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Sample records for bk020014 pall bds

  1. A Museum for Palle Nielsen

    DEFF Research Database (Denmark)

    Thorborg, Christoffer

    2016-01-01

    The present project attempts to articulate architecturally the psychic content in the danish graphic artist and draftsman Palle Nielsen's oeuvre. The museum inscribes itself within the city of Copenhagen as a part of it, but simultaneously establishes a taut vacuum between the city's buildings, t......, thereby setting these existing, surrounding monumental buildings in relief. The interior of the museum manifests itself as a dramatic, labyrinthine course of empty spaces, within which the visitor is deprived of contact with the city, and potentially loses his or her sense of place....

  2. CERES BiDirectional Scans (BDS) data in HDF (CER_BDS_TRMM-PFM_Edition1)

    Science.gov (United States)

    Wielicki, Bruce A. (Principal Investigator)

    Each BiDirectional Scans (BDS) data product contains twenty-four hours of Level-1b data for each CERES scanner instrument mounted on each spacecraft. The BDS includes samples taken in normal and short Earth scan elevation profiles in both fixed and rotating azimuth scan modes (including space, internal calibration, and solar calibration views). The BDS contains Level-0 raw (unconverted) science and instrument data as well as the geolocated converted science and instrument data. The BDS contains additional data not found in the Level-0 input file, including converted satellite position and velocity data, celestial data, converted digital status data, and parameters used in the radiance count conversion equations. The following CERES BDS data sets are currently available: CER_BDS_TRMM-PFM_Edition1 CER_BDS_Terra-FM1_Edition1 CER_BDS_Terra-FM2_Edition1 CER_BDS_Terra-FM1_Edition2 CER_BDS_Terra-FM2_Edition2 CER_BDS_Aqua-FM3_Edition1 CER_BDS_Aqua-FM4_Edition1 CER_BDS_Aqua-FM3_Edition2 CER_BDS_Aqua-FM4_Edition2 CER_BDS_Aqua-FM3_Edition1-CV CER_BDS_Aqua-FM4_Edition1-CV CER_BDS_Terra-FM1_Edition1-CV CER_BDS_Terra-FM2_Edition1-CV. [Location=GLOBAL] [Temporal_Coverage: Start_Date=1997-12-27; Stop_Date=2000-12-31] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Temporal_Resolution=1 day; Temporal_Resolution_Range=Daily - < Weekly].

  3. El Test BDS: Posibles Limitaciones

    Directory of Open Access Journals (Sweden)

    Sanz Carnero, Basilio

    2001-01-01

    Full Text Available El test BDS (1987 ha alcanzado un nivel de uso tan elevado que ha sido primeramente publicado en 1996, y, finalmente, elevado a formar parte de uno de los test que incorpora el difundido paquete informático conocido como E-views, en particular, en el caso de la última versión (Versión 4.0. Anticipándonos a lo que esto puede suponer, pretendemos asentar con la mayor claridad y simplicidad posible, los cometidos fundamentales del test BDS. En primer lugar, pretendemos en esta nota mostrar sus fundamentos, y sus limitaciones. Apuntamos, igualmente, algún atractor no detectado por el test, así como el uso sistemático y detallado del proceso a seguir para ejecutar el test. A lo largo del trabajo se exponen algunos criterios de elección de los parámetros principales. Las conclusiones fundamentales son, por un lado, que no es un test de caos determinista, y por otro, que es un test con poder para detectar estructura no lineal, tanto determinista como estocástica. Finalmente, se dan los resultados de aplicar el test original a varios atractores caóticos suficientemente conocidos.

  4. CERES BiDirectional Scans (BDS) data in HDF (CER_BDS_Aqua-FM3_Edition1-CV)

    Science.gov (United States)

    Wielicki, Bruce A. (Principal Investigator)

    Each BiDirectional Scans (BDS) data product contains twenty-four hours of Level-1b data for each CERES scanner instrument mounted on each spacecraft. The BDS includes samples taken in normal and short Earth scan elevation profiles in both fixed and rotating azimuth scan modes (including space, internal calibration, and solar calibration views). The BDS contains Level-0 raw (unconverted) science and instrument data as well as the geolocated converted science and instrument data. The BDS contains additional data not found in the Level-0 input file, including converted satellite position and velocity data, celestial data, converted digital status data, and parameters used in the radiance count conversion equations. The following CERES BDS data sets are currently available: CER_BDS_TRMM-PFM_Edition1 CER_BDS_Terra-FM1_Edition1 CER_BDS_Terra-FM2_Edition1 CER_BDS_Terra-FM1_Edition2 CER_BDS_Terra-FM2_Edition2 CER_BDS_Aqua-FM3_Edition1 CER_BDS_Aqua-FM4_Edition1 CER_BDS_Aqua-FM3_Edition2 CER_BDS_Aqua-FM4_Edition2 CER_BDS_Aqua-FM3_Edition1-CV CER_BDS_Aqua-FM4_Edition1-CV CER_BDS_Terra-FM1_Edition1-CV CER_BDS_Terra-FM2_Edition1-CV. [Location=GLOBAL] [Temporal_Coverage: Start_Date=1997-12-27; Stop_Date=2006-11-02] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Temporal_Resolution=1 day; Temporal_Resolution_Range=Daily - < Weekly].

  5. CERES BiDirectional Scans (BDS) data in HDF (CER_BDS_Terra-FM2_Edition1)

    Science.gov (United States)

    Wielicki, Bruce A. (Principal Investigator)

    Each BiDirectional Scans (BDS) data product contains twenty-four hours of Level-1b data for each CERES scanner instrument mounted on each spacecraft. The BDS includes samples taken in normal and short Earth scan elevation profiles in both fixed and rotating azimuth scan modes (including space, internal calibration, and solar calibration views). The BDS contains Level-0 raw (unconverted) science and instrument data as well as the geolocated converted science and instrument data. The BDS contains additional data not found in the Level-0 input file, including converted satellite position and velocity data, celestial data, converted digital status data, and parameters used in the radiance count conversion equations. The following CERES BDS data sets are currently available: CER_BDS_TRMM-PFM_Edition1 CER_BDS_Terra-FM1_Edition1 CER_BDS_Terra-FM2_Edition1 CER_BDS_Terra-FM1_Edition2 CER_BDS_Terra-FM2_Edition2 CER_BDS_Aqua-FM3_Edition1 CER_BDS_Aqua-FM4_Edition1 CER_BDS_Aqua-FM3_Edition2 CER_BDS_Aqua-FM4_Edition2 CER_BDS_Aqua-FM3_Edition1-CV CER_BDS_Aqua-FM4_Edition1-CV CER_BDS_Terra-FM1_Edition1-CV CER_BDS_Terra-FM2_Edition1-CV. [Location=GLOBAL] [Temporal_Coverage: Start_Date=1997-12-27; Stop_Date=2005-11-02] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Temporal_Resolution=1 day; Temporal_Resolution_Range=Daily - < Weekly].

  6. CERES BiDirectional Scans (BDS) data in HDF (CER_BDS_Terra-FM1_Edition1-CV)

    Science.gov (United States)

    Wielicki, Bruce A. (Principal Investigator)

    Each BiDirectional Scans (BDS) data product contains twenty-four hours of Level-1b data for each CERES scanner instrument mounted on each spacecraft. The BDS includes samples taken in normal and short Earth scan elevation profiles in both fixed and rotating azimuth scan modes (including space, internal calibration, and solar calibration views). The BDS contains Level-0 raw (unconverted) science and instrument data as well as the geolocated converted science and instrument data. The BDS contains additional data not found in the Level-0 input file, including converted satellite position and velocity data, celestial data, converted digital status data, and parameters used in the radiance count conversion equations. The following CERES BDS data sets are currently available: CER_BDS_TRMM-PFM_Edition1 CER_BDS_Terra-FM1_Edition1 CER_BDS_Terra-FM2_Edition1 CER_BDS_Terra-FM1_Edition2 CER_BDS_Terra-FM2_Edition2 CER_BDS_Aqua-FM3_Edition1 CER_BDS_Aqua-FM4_Edition1 CER_BDS_Aqua-FM3_Edition2 CER_BDS_Aqua-FM4_Edition2 CER_BDS_Aqua-FM3_Edition1-CV CER_BDS_Aqua-FM4_Edition1-CV CER_BDS_Terra-FM1_Edition1-CV CER_BDS_Terra-FM2_Edition1-CV. [Location=GLOBAL] [Temporal_Coverage: Start_Date=1997-12-27; Stop_Date=2006-11-02] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Temporal_Resolution=1 day; Temporal_Resolution_Range=Daily - < Weekly].

  7. CERES BiDirectional Scans (BDS) data in HDF (CER_BDS_Aqua-FM4_Edition1)

    Science.gov (United States)

    Wielicki, Bruce A. (Principal Investigator)

    Each BiDirectional Scans (BDS) data product contains twenty-four hours of Level-1b data for each CERES scanner instrument mounted on each spacecraft. The BDS includes samples taken in normal and short Earth scan elevation profiles in both fixed and rotating azimuth scan modes (including space, internal calibration, and solar calibration views). The BDS contains Level-0 raw (unconverted) science and instrument data as well as the geolocated converted science and instrument data. The BDS contains additional data not found in the Level-0 input file, including converted satellite position and velocity data, celestial data, converted digital status data, and parameters used in the radiance count conversion equations. The following CERES BDS data sets are currently available: CER_BDS_TRMM-PFM_Edition1 CER_BDS_Terra-FM1_Edition1 CER_BDS_Terra-FM2_Edition1 CER_BDS_Terra-FM1_Edition2 CER_BDS_Terra-FM2_Edition2 CER_BDS_Aqua-FM3_Edition1 CER_BDS_Aqua-FM4_Edition1 CER_BDS_Aqua-FM3_Edition2 CER_BDS_Aqua-FM4_Edition2 CER_BDS_Aqua-FM3_Edition1-CV CER_BDS_Aqua-FM4_Edition1-CV CER_BDS_Terra-FM1_Edition1-CV CER_BDS_Terra-FM2_Edition1-CV. [Location=GLOBAL] [Temporal_Coverage: Start_Date=1997-12-27; Stop_Date=2005-04-02] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Temporal_Resolution=1 day; Temporal_Resolution_Range=Daily - < Weekly].

  8. CERES BiDirectional Scans (BDS) data in HDF (CER_BDS_Aqua-FM3_Edition2)

    Science.gov (United States)

    Wielicki, Bruce A. (Principal Investigator)

    Each BiDirectional Scans (BDS) data product contains twenty-four hours of Level-1b data for each CERES scanner instrument mounted on each spacecraft. The BDS includes samples taken in normal and short Earth scan elevation profiles in both fixed and rotating azimuth scan modes (including space, internal calibration, and solar calibration views). The BDS contains Level-0 raw (unconverted) science and instrument data as well as the geolocated converted science and instrument data. The BDS contains additional data not found in the Level-0 input file, including converted satellite position and velocity data, celestial data, converted digital status data, and parameters used in the radiance count conversion equations. The following CERES BDS data sets are currently available: CER_BDS_TRMM-PFM_Edition1 CER_BDS_Terra-FM1_Edition1 CER_BDS_Terra-FM2_Edition1 CER_BDS_Terra-FM1_Edition2 CER_BDS_Terra-FM2_Edition2 CER_BDS_Aqua-FM3_Edition1 CER_BDS_Aqua-FM4_Edition1 CER_BDS_Aqua-FM3_Edition2 CER_BDS_Aqua-FM4_Edition2 CER_BDS_Aqua-FM3_Edition1-CV CER_BDS_Aqua-FM4_Edition1-CV CER_BDS_Terra-FM1_Edition1-CV CER_BDS_Terra-FM2_Edition1-CV. [Location=GLOBAL] [Temporal_Coverage: Start_Date=1997-12-27; Stop_Date=2006-01-01] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Temporal_Resolution=1 day; Temporal_Resolution_Range=Daily - < Weekly].

  9. CERES BiDirectional Scans (BDS) data in HDF (CER_BDS_Terra-FM2_Edition1-CV)

    Science.gov (United States)

    Wielicki, Bruce A. (Principal Investigator)

    Each BiDirectional Scans (BDS) data product contains twenty-four hours of Level-1b data for each CERES scanner instrument mounted on each spacecraft. The BDS includes samples taken in normal and short Earth scan elevation profiles in both fixed and rotating azimuth scan modes (including space, internal calibration, and solar calibration views). The BDS contains Level-0 raw (unconverted) science and instrument data as well as the geolocated converted science and instrument data. The BDS contains additional data not found in the Level-0 input file, including converted satellite position and velocity data, celestial data, converted digital status data, and parameters used in the radiance count conversion equations. The following CERES BDS data sets are currently available: CER_BDS_TRMM-PFM_Edition1 CER_BDS_Terra-FM1_Edition1 CER_BDS_Terra-FM2_Edition1 CER_BDS_Terra-FM1_Edition2 CER_BDS_Terra-FM2_Edition2 CER_BDS_Aqua-FM3_Edition1 CER_BDS_Aqua-FM4_Edition1 CER_BDS_Aqua-FM3_Edition2 CER_BDS_Aqua-FM4_Edition2 CER_BDS_Aqua-FM3_Edition1-CV CER_BDS_Aqua-FM4_Edition1-CV CER_BDS_Terra-FM1_Edition1-CV CER_BDS_Terra-FM2_Edition1-CV. [Location=GLOBAL] [Temporal_Coverage: Start_Date=1997-12-27; Stop_Date=2006-11-02] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Temporal_Resolution=1 day; Temporal_Resolution_Range=Daily - < Weekly].

  10. CERES BiDirectional Scans (BDS) data in HDF (CER_BDS_Aqua-FM4_Edition1-CV)

    Science.gov (United States)

    Wielicki, Bruce A. (Principal Investigator)

    Each BiDirectional Scans (BDS) data product contains twenty-four hours of Level-1b data for each CERES scanner instrument mounted on each spacecraft. The BDS includes samples taken in normal and short Earth scan elevation profiles in both fixed and rotating azimuth scan modes (including space, internal calibration, and solar calibration views). The BDS contains Level-0 raw (unconverted) science and instrument data as well as the geolocated converted science and instrument data. The BDS contains additional data not found in the Level-0 input file, including converted satellite position and velocity data, celestial data, converted digital status data, and parameters used in the radiance count conversion equations. The following CERES BDS data sets are currently available: CER_BDS_TRMM-PFM_Edition1 CER_BDS_Terra-FM1_Edition1 CER_BDS_Terra-FM2_Edition1 CER_BDS_Terra-FM1_Edition2 CER_BDS_Terra-FM2_Edition2 CER_BDS_Aqua-FM3_Edition1 CER_BDS_Aqua-FM4_Edition1 CER_BDS_Aqua-FM3_Edition2 CER_BDS_Aqua-FM4_Edition2 CER_BDS_Aqua-FM3_Edition1-CV CER_BDS_Aqua-FM4_Edition1-CV CER_BDS_Terra-FM1_Edition1-CV CER_BDS_Terra-FM2_Edition1-CV. [Location=GLOBAL] [Temporal_Coverage: Start_Date=1997-12-27; Stop_Date=2005-03-30] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Temporal_Resolution=1 day; Temporal_Resolution_Range=Daily - < Weekly].

  11. CERES BiDirectional Scans (BDS) data in HDF (CER_BDS_Aqua-FM3_Edition1)

    Science.gov (United States)

    Wielicki, Bruce A. (Principal Investigator)

    Each BiDirectional Scans (BDS) data product contains twenty-four hours of Level-1b data for each CERES scanner instrument mounted on each spacecraft. The BDS includes samples taken in normal and short Earth scan elevation profiles in both fixed and rotating azimuth scan modes (including space, internal calibration, and solar calibration views). The BDS contains Level-0 raw (unconverted) science and instrument data as well as the geolocated converted science and instrument data. The BDS contains additional data not found in the Level-0 input file, including converted satellite position and velocity data, celestial data, converted digital status data, and parameters used in the radiance count conversion equations. The following CERES BDS data sets are currently available: CER_BDS_TRMM-PFM_Edition1 CER_BDS_Terra-FM1_Edition1 CER_BDS_Terra-FM2_Edition1 CER_BDS_Terra-FM1_Edition2 CER_BDS_Terra-FM2_Edition2 CER_BDS_Aqua-FM3_Edition1 CER_BDS_Aqua-FM4_Edition1 CER_BDS_Aqua-FM3_Edition2 CER_BDS_Aqua-FM4_Edition2 CER_BDS_Aqua-FM3_Edition1-CV CER_BDS_Aqua-FM4_Edition1-CV CER_BDS_Terra-FM1_Edition1-CV CER_BDS_Terra-FM2_Edition1-CV. [Location=GLOBAL] [Temporal_Coverage: Start_Date=1997-12-27; Stop_Date=2005-11-02] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Temporal_Resolution=1 day; Temporal_Resolution_Range=Daily - < Weekly].

  12. CERES BiDirectional Scans (BDS) data in HDF (CER_BDS_Terra-FM1_Edition2)

    Science.gov (United States)

    Wielicki, Bruce A. (Principal Investigator)

    Each BiDirectional Scans (BDS) data product contains twenty-four hours of Level-1b data for each CERES scanner instrument mounted on each spacecraft. The BDS includes samples taken in normal and short Earth scan elevation profiles in both fixed and rotating azimuth scan modes (including space, internal calibration, and solar calibration views). The BDS contains Level-0 raw (unconverted) science and instrument data as well as the geolocated converted science and instrument data. The BDS contains additional data not found in the Level-0 input file, including converted satellite position and velocity data, celestial data, converted digital status data, and parameters used in the radiance count conversion equations. The following CERES BDS data sets are currently available: CER_BDS_TRMM-PFM_Edition1 CER_BDS_Terra-FM1_Edition1 CER_BDS_Terra-FM2_Edition1 CER_BDS_Terra-FM1_Edition2 CER_BDS_Terra-FM2_Edition2 CER_BDS_Aqua-FM3_Edition1 CER_BDS_Aqua-FM4_Edition1 CER_BDS_Aqua-FM3_Edition2 CER_BDS_Aqua-FM4_Edition2 CER_BDS_Aqua-FM3_Edition1-CV CER_BDS_Aqua-FM4_Edition1-CV CER_BDS_Terra-FM1_Edition1-CV CER_BDS_Terra-FM2_Edition1-CV. [Location=GLOBAL] [Temporal_Coverage: Start_Date=1997-12-27; Stop_Date=2006-01-01] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Temporal_Resolution=1 day; Temporal_Resolution_Range=Daily - < Weekly].

  13. CERES BiDirectional Scans (BDS) data in HDF (CER_BDS_Terra-FM1_Edition1)

    Science.gov (United States)

    Wielicki, Bruce A. (Principal Investigator)

    Each BiDirectional Scans (BDS) data product contains twenty-four hours of Level-1b data for each CERES scanner instrument mounted on each spacecraft. The BDS includes samples taken in normal and short Earth scan elevation profiles in both fixed and rotating azimuth scan modes (including space, internal calibration, and solar calibration views). The BDS contains Level-0 raw (unconverted) science and instrument data as well as the geolocated converted science and instrument data. The BDS contains additional data not found in the Level-0 input file, including converted satellite position and velocity data, celestial data, converted digital status data, and parameters used in the radiance count conversion equations. The following CERES BDS data sets are currently available: CER_BDS_TRMM-PFM_Edition1 CER_BDS_Terra-FM1_Edition1 CER_BDS_Terra-FM2_Edition1 CER_BDS_Terra-FM1_Edition2 CER_BDS_Terra-FM2_Edition2 CER_BDS_Aqua-FM3_Edition1 CER_BDS_Aqua-FM4_Edition1 CER_BDS_Aqua-FM3_Edition2 CER_BDS_Aqua-FM4_Edition2 CER_BDS_Aqua-FM3_Edition1-CV CER_BDS_Aqua-FM4_Edition1-CV CER_BDS_Terra-FM1_Edition1-CV CER_BDS_Terra-FM2_Edition1-CV. [Location=GLOBAL] [Temporal_Coverage: Start_Date=1997-12-27; Stop_Date=2005-11-02] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Temporal_Resolution=1 day; Temporal_Resolution_Range=Daily - < Weekly].

  14. CERES BiDirectional Scans (BDS) data in HDF (CER_BDS_Terra-FM2_Edition2)

    Science.gov (United States)

    Wielicki, Bruce A. (Principal Investigator)

    Each BiDirectional Scans (BDS) data product contains twenty-four hours of Level-1b data for each CERES scanner instrument mounted on each spacecraft. The BDS includes samples taken in normal and short Earth scan elevation profiles in both fixed and rotating azimuth scan modes (including space, internal calibration, and solar calibration views). The BDS contains Level-0 raw (unconverted) science and instrument data as well as the geolocated converted science and instrument data. The BDS contains additional data not found in the Level-0 input file, including converted satellite position and velocity data, celestial data, converted digital status data, and parameters used in the radiance count conversion equations. The following CERES BDS data sets are currently available: CER_BDS_TRMM-PFM_Edition1 CER_BDS_Terra-FM1_Edition1 CER_BDS_Terra-FM2_Edition1 CER_BDS_Terra-FM1_Edition2 CER_BDS_Terra-FM2_Edition2 CER_BDS_Aqua-FM3_Edition1 CER_BDS_Aqua-FM4_Edition1 CER_BDS_Aqua-FM3_Edition2 CER_BDS_Aqua-FM4_Edition2 CER_BDS_Aqua-FM3_Edition1-CV CER_BDS_Aqua-FM4_Edition1-CV CER_BDS_Terra-FM1_Edition1-CV CER_BDS_Terra-FM2_Edition1-CV. [Location=GLOBAL] [Temporal_Coverage: Start_Date=1997-12-27; Stop_Date=2006-01-01] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Temporal_Resolution=1 day; Temporal_Resolution_Range=Daily - < Weekly].

  15. CERES BiDirectional Scans (BDS) data in HDF (CER_BDS_Aqua-FM4_Edition2)

    Science.gov (United States)

    Wielicki, Bruce A. (Principal Investigator)

    Each BiDirectional Scans (BDS) data product contains twenty-four hours of Level-1b data for each CERES scanner instrument mounted on each spacecraft. The BDS includes samples taken in normal and short Earth scan elevation profiles in both fixed and rotating azimuth scan modes (including space, internal calibration, and solar calibration views). The BDS contains Level-0 raw (unconverted) science and instrument data as well as the geolocated converted science and instrument data. The BDS contains additional data not found in the Level-0 input file, including converted satellite position and velocity data, celestial data, converted digital status data, and parameters used in the radiance count conversion equations. The following CERES BDS data sets are currently available: CER_BDS_TRMM-PFM_Edition1 CER_BDS_Terra-FM1_Edition1 CER_BDS_Terra-FM2_Edition1 CER_BDS_Terra-FM1_Edition2 CER_BDS_Terra-FM2_Edition2 CER_BDS_Aqua-FM3_Edition1 CER_BDS_Aqua-FM4_Edition1 CER_BDS_Aqua-FM3_Edition2 CER_BDS_Aqua-FM4_Edition2 CER_BDS_Aqua-FM3_Edition1-CV CER_BDS_Aqua-FM4_Edition1-CV CER_BDS_Terra-FM1_Edition1-CV CER_BDS_Terra-FM2_Edition1-CV. [Location=GLOBAL] [Temporal_Coverage: Start_Date=1997-12-27; Stop_Date=2005-03-29] [Spatial_Coverage: Southernmost_Latitude=-90; Northernmost_Latitude=90; Westernmost_Longitude=-180; Easternmost_Longitude=180] [Data_Resolution: Temporal_Resolution=1 day; Temporal_Resolution_Range=Daily - < Weekly].

  16. CLIC BDS Tuning, Alignment and Feedbacks Integrated Simulations

    CERN Document Server

    Dalena, B; Schulte, D; Snuverink, J; Tomas, R; Jones, J; Latina, A; Resta, J

    2010-01-01

    The CLIC BDS tuning, alignment and feedbacks studies have been typically performed independently and only over particular sections of the BDS. An effort is being put to integrate all these procedures to realistically evaluate the luminosity performance.

  17. BDS tuning and luminosity monitoring in CLIC

    CERN Document Server

    Dalena, Barbara; Latina, Andrea; Marin, Eduardo; Pfingstner, Jurgen; Schulte, Daniel; Snuverink, Jochem; Tomas, Rogelio; Zamudio, Guillermo

    2011-01-01

    The emittance preservation in the Beam Delivery System (BDS) is one of the major challenges in CLIC. The fast detuning of the final focus optics requires an on-­line tuning procedure in order to keep luminosity close to the maximum. Different tuning techniques have been applied to the CLIC BDS and in particular to the Final Focus System (FFS) in order to mitigate static and dynamic imperfections. Some of them require a fast luminosity measurement. Here we study the possibility to use beam-­beam backgrounds processes at CLIC 3 TeV CM energy as fast luminosity signal. In particular the hadrons multiplicity in the detector region is investigated.

  18. Biocatalytic desulfurization (BDS) of petrodiesel fuels.

    Science.gov (United States)

    Mohebali, Ghasemali; Ball, Andrew S

    2008-08-01

    Oil refineries are facing many challenges, including heavier crude oils, increased fuel quality standards, and a need to reduce air pollution emissions. Global society is stepping on the road to zero-sulfur fuel, with only differences in the starting point of sulfur level and rate reduction of sulfur content between different countries. Hydrodesulfurization (HDS) is the most common technology used by refineries to remove sulfur from intermediate streams. However, HDS has several disadvantages, in that it is energy intensive, costly to install and to operate, and does not work well on refractory organosulfur compounds. Recent research has therefore focused on improving HDS catalysts and processes and also on the development of alternative technologies. Among the new technologies one possible approach is biocatalytic desulfurization (BDS). The advantage of BDS is that it can be operated in conditions that require less energy and hydrogen. BDS operates at ambient temperature and pressure with high selectivity, resulting in decreased energy costs, low emission, and no generation of undesirable side products. Over the last two decades several research groups have attempted to isolate bacteria capable of efficient desulfurization of oil fractions. This review examines the developments in our knowledge of the application of bacteria in BDS processes, assesses the technical viability of this technology and examines its future challenges.

  19. Measurement of B(Ds -> munu)

    CERN Document Server

    Abe, K; Aihara, H; Arinstein, K; Aso, T; Aulchenko, V; Aushev, T; Aziz, T; Bahinipati, S; Bakich, A M; Balagura, V; Ban, Y; Banerjee, S; Barberio, E; Bay, A; Bedny, I; Belous, K S; Bhardwaj, V; Bitenc, U; Blyth, S; Bondar, A; Bozek, A; Bracko, M; Brodzicka, J; Browder, T E; Chang, M C; Chang, P; Chao, Y; Chen, A; Chen, K F; Chen, W T; Cheon, B G; Chiang, C C; Chistov, R; Cho, I S; Choi, S K; Choi, Y; Choi, Y K; Cole, S; Dalseno, J; Danilov, M; Das, A; Dash, M; Dragic, J; Drutskoy, A; Eidelman, S; Epifanov, D; Fratina, S; Fujii, H; Fujikawa, M; Gabyshev, N; Garmash, A; Go, A; Gokhroo, G; Goldenzweig, P; Golob, B; Grosse-Perdekamp, M; Guler, H; Ha, H; Haba, J; Hara, K; Hara, T; Hasegawa, Y; Hastings, N C; Hayasaka, K; Hayashii, H; Hazumi, M; Heffernan, D; Higuchi, T; Hinz, L; Hoedlmoser, H; Hokuue, T; Horii, Y; Hoshi, Y; Hoshina, K; Hou, S; Hou, W S; Hsiung, Y B; Hyun, H J; Igarashi, Y; Iijima, T; Ikado, K; Inami, K; Ishikawa, A; Ishino, H; Itoh, R; Iwabuchi, M; Iwasaki, M; Iwasaki, Y; Jacoby, C; Joshi, N J; Kaga, M; Kah, D H; Kaji, H; Kajiwara, S; Kakuno, H; Kang, J H; Kapusta, P; Kataoka, S U; Katayama, N; Kawai, H; Kawasaki, T; Kibayashi, A; Kichimi, H; Kim, H J; Kim, H O; Kim, J H; Kim, S K; Kim, Y J; Kinoshita, K; Korpar, S; Kozakai, Y; Krizan, P; Krokovny, P; Kumar, R; Kurihara, E; Kusaka, A; Kuzmin, A; Kwon, Y J; Lange, J S; Leder, G; Lee, J; Lee, J S; Lee, M J; Lee, S E; Lesiak, T; Li, J; Limosani, A; Lin, S W; Liu, Y; Liventsev, D; MacNaughton, J; Majumder, G; Mandl, F; Marlow, D; Matsumura, T; Matyja, A; McOnie, S; Medvedeva, T; Mikami, Y; Mitaroff, W A; Miyabayashi, K; Miyake, H; Miyata, H; Miyazaki, Y; Mizuk, R; Moloney, G R; Mori, T; Müller, J; Murakami, A; Nagamine, T; Nagasaka, Y; Nakahama, Y; Nakamura, I; Nakano, E; Nakao, M; Nakayama, H; Nakazawa, H; Natkaniec, Z; Neichi, K; Nishida, S; Nishimura, K; Nishio, Y; Nishizawa, I; Nitoh, O; Noguchi, S; Nozaki, T; Ogawa, A; Ogawa, S; Ohshima, T; Okuno, S; Olsen, S L; Ono, S; Ostrowicz, W; Ozaki, H; Pakhlov, P; Pakhlova, G; Palka, H; Park, C W; Park, H; Park, K S; Parslow, N; Peak, L S; Pernicka, M; Pestotnik, R; Peters, M; Piilonen, L E; Poluektov, A; Rorie, J; Rózanska, M; Sahoo, H; Sakai, Y; Sakaue, H; Sasao, N; Sarangi, T R; Satoyama, N; Sayeed, K; Schietinger, T; Schneider, O; Schonmeier, P; Schümann, J; Schwanda, C; Schwartz, A J; Seidl, R; Sekiya, A; Senyo, K; Sevior, M E; Shang, L; Shapkin, M; Shen, C P; Shibuya, H; Shinomiya, S; Shiu, J G; Shwartz, B; Singh, J B; Sokolov, A; Solovieva, E; Somov, A; Stanic, S; Staric, M; Stypula, J; Sugiyama, A; Sumisawa, K; Sumiyoshi, T; Suzuki, S; Suzuki, S Y; Tajima, O; Takasaki, F; Tamai, K; Tamura, N; Tanaka, M; Taniguchi, N; Taylor, G N; Teramoto, Y; Tikhomirov, I; Trabelsi, K; Tse, Y F; Tsuboyama, T; Uchida, K; Uchida, Y; Uehara, S; Ueno, K; Uglov, T; Unno, Y; Uno, S; Urquijo, P; Ushiroda, Y; Usov, Yu; Varner, G; Varvell, K E; Vervink, K; Villa, S; Vinokurova, A; Wang, C C; Wang, C H; Wang, J; Wang, M Z; Wang, P; Wang, X L; Watanabe, M; Watanabe, Y; Wedd, R; Wicht, J; Widhalm, L; Wiechczynski, J; Won, E; Yabsley, B D; Yamaguchi, A; Yamamoto, H; Yamaoka, M; Yamashita, Y; Yamauchi, M; Yuan, C Z; Yusa, Y; Zhang, C C; Zhang, L M; Zhang, Z P; Zhilich, V; Zhulanov, V; Zupanc, A; Zwahlen, N

    2007-01-01

    We present preliminary results for the branching fraction B(Ds -> munu) using a 548 fb^-1 data sample collected by the Belle experiment at the KEKB e+e- collider. The Ds momentum is determined by full reconstruction of the recoil system in events of the type e+e- -> D*sDKX, D*s -> Ds gamma where X is any number of additional pions or photons from fragmentation. The full reconstruction method provides high resolution in the neutrino momentum and thus good background separation, equivalent to that reached at experiments at the tau-charm factories such as CLEO-c or BES. We obtain the preliminary branching fraction B(Ds -> munu) = (6.44 +- 0.76 (stat) +- 0.52 (syst)) x 10^(-3), implying a Ds decay constant of f_Ds = 275 +- 16 (stat) +- 12 (syst) MeV.

  20. The ISS Sensitizing Agents Data Bank (BDS).

    Science.gov (United States)

    Brunetto, Barbara; Binetti, Roberto; Ceccarelli, Federica; Costamagna, Francesca Marina; D'Angiolini, Antonella; Fabri, Alessandra; Ferri, Maurizio; Marcello, Ida; Riva, Giovanni; Roazzi, Paolo; Trucchi, Daniela; Tinghino, Raffaella

    2008-01-01

    The Istituto Superiore Sanità has developed a data bank on sensitizing substances (Banca Dati Sensibilizzanti, BDS), available on website (www.iss.it/bdse/), sharing complete, controlled and updated information coming from different sources, such as scientific publications, international agencies and governmental or non governmental organizations. It is worthwhile that the main objective of the BDS is not the classification of sensitizing or potentially sensitizing agents within specific risk classes, but it is essentially to provide concise and non confidential information related to this endpoint. At present, the BDS includes: all the substances officially classified by European Union, (Annex I to Directive 67/548/EEC), some substances listed in I (Directive 67/548/EEC) for endpoints different than "sensitization" but indicated as sensitizers by other relevant institutions, all the substances indicated as sensitizers by relevant agencies or institutions (ACGIH, DFG), some substances indicted as sensitizers by industry and other non-governmental organizations (ETAD and HERA), all the substances regarded as "potentially sensitizing dyes" by the Commission of the European Community for the award of the eco-label to textile products, some substances for which, even in the absence of any categorization by Union, ACGIH or DFG, it is not possible to exclude a sensitizing potential on the basis of reliable documents.

  1. Päike ja pall : [luuletused] / Ott Arder

    Index Scriptorium Estoniae

    Arder, Ott

    2001-01-01

    Sisu: Päike ja pall ; Õuna ja lõuna ; Kõige ilusam asi ; Emajõgi ; Väikemehe probleem ; Küünal ; Kapten ; Kaksteist kilu ja kaks teist kilu ; Suur ja seisev, ripub seinal ; Laul tagumisest vagunist ; Ultimaatum ; Ilus algus ; Pliiat(siga) ; Mure ja Amour ; kodust ja loomadest ; Eesli jõulupuu ; Aja saapad ; Lendav järv ; Unenäolaul ; Tere hommikust ja õhtust ; Kõik, mis juhtub ja ei juhtu ; Kas panna päkka või visata varvast ; Lihtne mees ; Väljaütlev ; Külm sõda ; Ohkav kruvi ; Metsa all ; Lauluke ; Unemetsades ; Suur rõõm ja väike mure ; Hea muusika ; Koer poiss ja plika ; Kes mängida veel ei oska ; Raske lumi ; Mere kaldal ; Unenäoukse taga

  2. Evaluation of GPS/BDS indoor positioning performance and enhancement

    Science.gov (United States)

    He, Zhe; Petovello, Mark; Pei, Ling; Olesen, Daniel M.

    2017-02-01

    This paper assesses the potential of using BDS and GPS signals to position in challenged environments such as indoors. Traditional assisted GNSS approaches that use code phase as measurements (i.e., coarse-time solutions) are shown to be prone to multipath and noise. An enhanced approach that has superior sensitivity and positioning performance-the so-called direct positioning receiver architecture-has been implemented and evaluated using live indoor BDS and/or GPS signals. Real indoor experiments have been conducted in Shanghai and significant improvement has been observed with enhanced approaches: results with BDS constellation show better horizontal positioning performance (biases are less than 10 m) than using GPS alone, but are slightly worse in the vertical axis; when using the enhanced approach with BDS and GPS, both horizontal and vertical axes show promising results for the environments considered herein; the coarse-time state converges faster and is more reliable compared to other solutions.

  3. Evaluation of GPS/BDS indoor positioning performance and enhancement

    DEFF Research Database (Denmark)

    He, Zhe; Petovello, Mark; Pei, Ling;

    2017-01-01

    This paper assesses the potential of using BDS and GPS signals to position in challenged environments such as indoors. Traditional assisted GNSS approaches that use code phase as measurements (i.e., coarse-time solutions) are shown to be prone to multipath and noise. An enhanced approach that has...... superior sensitivity and positioning performance—the so-called direct positioning receiver architecture—has been implemented and evaluated using live indoor BDS and/or GPS signals. Real indoor experiments have been conducted in Shanghai and significant improvement has been observed with enhanced approaches......: results with BDS constellation show better horizontal positioning performance (biases are less than 10m) than using GPS alone, but are slightly worse in the vertical axis; when using the enhanced approach with BDS and GPS, both horizontal and vertical axes show promising results for the environments...

  4. Choosing and using citation and bibliographic database software (BDS).

    Science.gov (United States)

    Hernandez, David A; El-Masri, Maher M; Hernandez, Cheri Ann

    2008-01-01

    The diabetes educator/researcher is faced with a proliferation of diabetes articles in various journals, both online and in print. Keeping track of cited references and remembering how to cite the references in text and the bibliography can be a daunting task for the new researcher and a tedious task for the experienced researcher. The challenge is to find and use a technology, such as bibliographic database software (BDS), which can help to manage this information overload. This article focuses on the use of BDS for the diabetes educator who is undertaking research. BDS can help researchers access and organize literature and make literature searches more efficient and less time consuming. Moreover, the use of such programs tends to reduce errors associated with the complexity of bibliographic citations and can increase the productivity of scholarly publications. The purpose of this article is to provide an overview of BDS currently available, describe how it can be used to aid researchers in their work, and highlight the features of different programs. It is important for diabetes educators and researchers to explore the many benefits of such BDS programs and consider their use to enhance the accuracy and efficiency of accessing and citing references of their research work and publications. Armed with this knowledge, researchers will be able to make informed decisions about selecting BDS which will meet their usage requirements.

  5. BDS/GPS组合相对定位方法及精度分析%Relative Positioning of Combined BDS/GPS and Its Accuracy Analysis

    Institute of Scientific and Technical Information of China (English)

    王世进; 秘金钟; 谷守周; 祝会忠

    2014-01-01

    基于BDS/GPS联合定位的时空基准统一,详细介绍BDS/GPS定位的数学模型.在伪距双差和载波相位相对定位两种算法的基础上,编写BDS/GPS定位程序处理实测的BDS/GPS短基线数据.最后对比和分析在BDS、GPS、BDS/GPS 3种模式下的定位精度水平.本文的分析为BDS/GPS的定位提供了一定参考.

  6. Contribution Analysis of BDS/GPS Combined Orbit Determination

    Science.gov (United States)

    Zhang, Qin

    2016-07-01

    BeiDou Navigation Satellite System (BDS) does not have the ability of global navigation and positioning currently. The whole tracking observation of satellite orbit and the geometry of reference station are not perfect. These situations influence the accuracy of satellite orbit determination. Based on the theory and method of dynamic orbit determination, the analytical contribution of multi-GNSS combined orbit determination to the solution precision of parameters was derived. And using the measured data, the statistical contribution of BDS/GPS combined orbit determination to the solution precision of orbit and clock error was analyzed. The results show that the contribution of combined orbit determination to the solution precision of the common parameters between different systems was significant. The solution precisions of the orbit and clock error were significantly improved except GEO satellites. The statistical contribution of BDS/GPS combined orbit determination to the precision of BDS satellite orbit, the RMS of BDS satellite clock error and the RMS of receiver clock error were 36.21%, 26.88% and 20.88% respectively. Especially, the contribution to the clock error of receivers which were in the area with few visible satellites was particularly significant. And the statistical contribution was 45.95%.

  7. Glacial Refugium of Pinus pumila (Pall.) Regel in Northeastern Siberia

    Energy Technology Data Exchange (ETDEWEB)

    Shilo, N A; Lozhkin, A V; Anderson, P M; Brown, T A; Pakhomov, A Y; Solomatkina, T B

    2007-02-10

    One of the most glowing representatives of the Kolyma flora [1], ''Pinus pumila'' (Pall.) Regel (Japanese stone pine), is a typical shrub in larch forests of the northern Okhotsk region, basins of the Kolyma and Indigirka rivers, and high-shrub tundra of the Chukchi Peninsula. It also forms a pine belt in mountains above the forest boundary, which gives way to the grass-underbrush mountain tundra and bald mountains. In the southern Chukchi Peninsula, ''Pinus pumila'' along with ''Duschekia fruticosa'' (Rupr.) Pouzar and ''Betula middendorffii'' Trautv. et C. A. Mey form trailing forests transitional between tundra and taiga [2]. Pinus pumila pollen, usually predominating in subfossil spore-and-pollen spectra of northeastern Siberia, is found as single grains or a subordinate component (up 2-3%, rarely 10%) in spectra of lacustrine deposits formed during the last glacial stage (isotope stage 2) in the Preboreal and Boreal times of the Holocene. Sometimes, its content increases to 15-22% in spectra of lacustrine deposits synchronous to the last glacial stage near the northern coast of the Sea of Okhotsk [3], evidently indicating the proximity of Japanese stone pine thickets.

  8. The PPP Precision Analysis Based on BDS Regional Navigation System

    Directory of Open Access Journals (Sweden)

    ZHU Yongxing

    2015-04-01

    Full Text Available BeiDou navigation satellite system(BDS has opened service in most of the Asia-Pacific region, it offers the possibility to break the technological monopoly of GPS in the field of high-precision applications, so its performance of precise point positioning (PPP has been a great concern. Firstly, the constellation of BeiDou regional navigation system and BDS/GPS tracking network is introduced. Secondly, the precise ephemeris and clock offset accuracy of BeiDou satellite based on domestic tracking network is analyzed. Finally, the static and kinematic PPP accuracy is studied, and compared with the GPS. The actual measured numerical example shows that the static and kinematic PPP based on BDS can achieve centimeter-level and decimeter-level respectively, reaching the current level of GPS precise point positioning.

  9. Research Progress of BDS/INS Integration Navigation Technology%BDS/INS组合导航技术研究进展

    Institute of Scientific and Technical Information of China (English)

    李红; 蔡成林

    2015-01-01

    With the development of the Beidou satellite navigation system technology,the study of BDS/INS has been a research focus currently.Discusses the development and application status of BDS/INS integrated navigation technology.Focuses on the pros and cons of principles of the integrated navigation method,further sums up the current BDS/INS integrated navigation technology and the current status,as well as it's application and research progress.Then summarizes the trends of the research of BDS/INS integration technology and providing valuable reference for further study of BDS/INS integration navigation technology.%随着北斗卫星导航系统(BDS)建设逐渐完善,BDS与惯性(INS)组合导航研究已成为导航技术最具应用前景的研究热点.对BDS/INS组合导航关键技术的发展及应用现状进行论述.重点分析组合导航方式的实现原理及优缺点,归纳总结BDS/INS组合导航技术及研究现状,并介绍其应用研究进展,总结BDS/INS组合导航技术研究趋势,对进一步深入研究BDS/INS组合导航技术具有借鉴意义.

  10. Evidence of Accelerated Evolution and Ectodermal-Specific Expression of Presumptive BDS Toxin cDNAs from Anemonia viridis

    OpenAIRE

    Aldo Nicosia; Teresa Maggio; Salvatore Mazzola; Angela Cuttitta

    2013-01-01

    Anemonia viridis is a widespread and extensively studied Mediterranean species of sea anemone from which a large number of polypeptide toxins, such as blood depressing substances (BDS) peptides, have been isolated. The first members of this class, BDS-1 and BDS-2, are polypeptides belonging to the β-defensin fold family and were initially described for their antihypertensive and antiviral activities. BDS-1 and BDS-2 are 43 amino acid peptides characterised by three disulfide bonds that act as...

  11. GPS 和 BDS 混合定位模型的可靠性分析%Reliability Analysis for GPS/BDS Integrated Positioning System

    Institute of Scientific and Technical Information of China (English)

    杨玲; 李博峰; 沈云中

    2015-01-01

    针对 BDS 不同于 GPS 卫星星座的特点,论述了不同 BDS 卫星对系统导航定位性能的贡献及影响程度,结合GPS 和 BDS 卫星的特点分析了星座分布对定位精度、系统可靠性及对故障的抗差能力强弱的影响。通过仿真实验分析对比了中国境内某点处 GPS、BDS 以及两者的组合系统的导航精度、系统可靠性及对故障的可区分能力的强弱,侧重分析了组合系统相较于单系统而言在抗差性及对故障的可区分性方面的改进效果。%Since the characteristic of BeiDou Satellite Navigation System (BDS)is different from Global Positioning System (GPS),we discussed the contribution of BDS satellites constellation to the system’s navigation performance,as well as the performance of GPS/BDS integrated system was analyzed,in terms of positioning accuracy,system reliability and integri-ty.Based on the simulation results,the positioning accuracy,system reliability and separability are compared among GPS, BDS and GPS/BDS integrated system.Most importantly,the performance improvement on fault detection and identification of GPS/BDS integrated system are analyzed,compared with GPS and BDS standalone systems.

  12. Vanemahüvitis : korduma kippuvad küsimused / Katre Pall

    Index Scriptorium Estoniae

    Pall, Katre, 1970-

    2007-01-01

    Sotsiaalministeeriumi spetsialist Katre Pall vastab lugejate küsimustele: vanemahüvitis ja teised peretoetused, muud tulud ja vanemahüvitis, ilma sünnituspuhkuseta, kui sünnitan Soomes. Lisatud: vanemahüvitise ABC

  13. An enhanced algorithm to estimate BDS satellite's differential code biases

    Science.gov (United States)

    Shi, Chuang; Fan, Lei; Li, Min; Liu, Zhizhao; Gu, Shengfeng; Zhong, Shiming; Song, Weiwei

    2016-02-01

    This paper proposes an enhanced algorithm to estimate the differential code biases (DCB) on three frequencies of the BeiDou Navigation Satellite System (BDS) satellites. By forming ionospheric observables derived from uncombined precise point positioning and geometry-free linear combination of phase-smoothed range, satellite DCBs are determined together with ionospheric delay that is modeled at each individual station. Specifically, the DCB and ionospheric delay are estimated in a weighted least-squares estimator by considering the precision of ionospheric observables, and a misclosure constraint for different types of satellite DCBs is introduced. This algorithm was tested by GNSS data collected in November and December 2013 from 29 stations of Multi-GNSS Experiment (MGEX) and BeiDou Experimental Tracking Stations. Results show that the proposed algorithm is able to precisely estimate BDS satellite DCBs, where the mean value of day-to-day scattering is about 0.19 ns and the RMS of the difference with respect to MGEX DCB products is about 0.24 ns. In order to make comparison, an existing algorithm based on IGG: Institute of Geodesy and Geophysics, China (IGGDCB), is also used to process the same dataset. Results show that, the DCB difference between results from the enhanced algorithm and the DCB products from Center for Orbit Determination in Europe (CODE) and MGEX is reduced in average by 46 % for GPS satellites and 14 % for BDS satellites, when compared with DCB difference between the results of IGGDCB algorithm and the DCB products from CODE and MGEX. In addition, we find the day-to-day scattering of BDS IGSO satellites is obviously lower than that of GEO and MEO satellites, and a significant bias exists in daily DCB values of GEO satellites comparing with MGEX DCB product. This proposed algorithm also provides a new approach to estimate the satellite DCBs of multiple GNSS systems.

  14. The CLIC BDS Towards the Conceptual Design Report

    Energy Technology Data Exchange (ETDEWEB)

    Tomas, Rogelio; /CERN; Dalena, Barbara; /CERN; Marin, Eduardo; /CERN; Schulte, Daniel; /CERN; Zamudio, Guillermo; /CERN; Angal-Kalinin, Deepa; /Cockcroft Inst. Accel. Sci. Tech.; Fernandez-Hernando, Juan; /Cockcroft Inst. Accel. Sci. Tech.; Jackson, Frank; /Cockcroft Inst. Accel. Sci. Tech.; Resta-Lopez, Javier; /Oxford U., JAI; Seryi, Andrei; /SLAC

    2012-07-05

    The CLIC Conceptual Design Report (CDR) must be ready by 2010. This paper aims at addressing all the critical points of the CLIC Beam Delivery Systems (BDS) to be later implemented in the CDR. This includes risk evaluation and possible solutions to a number of selected points. The smooth and practical transition between the 500 GeV CLIC and the design energy of 3 TeV is also studied.

  15. 最新蓝光家庭影院系统kardon harman/kardon BDS

    Institute of Scientific and Technical Information of China (English)

    杨照珩

    2011-01-01

    2011年6月,哈曼集团推出三款蓝光家庭影院系统——kardon harman/kardon BDS系列蓝光家庭影院系统BDS800,BDS600与BDS400。强大的BDS系统组件高度集成,集成了通用蓝光播放器(带RDS)、

  16. The Long-term Performance Analysis for On-board Atomic Clocks of BDS

    OpenAIRE

    WANG Yupu; LÜ Zhiping; Wang, Ning

    2017-01-01

    BeiDou Navigation Satellite System (BDS) has begun to provide regional services since the end of 2012. It plays an important role in analyzing the long-term performance of BDS satellite clocks in evaluating the performance of the whole system, determining and predicting satellite clock bias (SCB) etc. Precise satellite clock data products derived from multi-satellite orbit determination are used to conduct the performance analysis of BDS satellite clocks. Specifically, the characteristics of ...

  17. BDS/GPS伪距单点定位的精度对比分析%Precision Simulation Analysis of BDS/GPS Pseudo-Range Single Point Positioning

    Institute of Scientific and Technical Information of China (English)

    陈立; 王雷; 谭周燚

    2016-01-01

    本文主要介绍了BDS/GPS伪距单点定位的数学模型和算法分析,然后对BDS/GPS接收机接收到的单点定位的数据进行仿真实验分析。通过比较BDS与GPS在同一时段内X、Y、Z三个方向上的RMS值,PDOP值以及可见卫星数的变化,来比较BDS/GPS的伪距单点定位的性能。实验结果表明:北斗与GPS伪距单点定位性能相差不大,GPS的PDOP值约为1.8,BDS的PDOP值约为2.5,GPS的RMS定位精度在4m以内,北斗的RMS定位精度优于9m。%A mathematical model and algorithm analysis of BDS / GPS pseudo-range point positioning are introduced in this paper, and then the data of single point positioning which is received by the BDS/GPS receiver is simulated and analyzed. The RMS of BDS and GPS in the same period of X, Y, Z three directions and the PDOP values and changes in the number of visible satellites, the performance of BDS/GPS pseudo-range single point positioning are all compared. The results show that: PDOP value of GPS is about 1.8, PDOP value of BDS is about 2.5, RMS positioning precision of GPS is within 4m, RMS positioning precision of BDS is better than 9m.

  18. Improving Ambiguity Resolution for Medium Baselines Using Combined GPS and BDS Dual/Triple-Frequency Observations.

    Science.gov (United States)

    Gao, Wang; Gao, Chengfa; Pan, Shuguo; Wang, Denghui; Deng, Jiadong

    2015-10-30

    The regional constellation of the BeiDou navigation satellite system (BDS) has been providing continuous positioning, navigation and timing services since 27 December 2012, covering China and the surrounding area. Real-time kinematic (RTK) positioning with combined BDS and GPS observations is feasible. Besides, all satellites of BDS can transmit triple-frequency signals. Using the advantages of multi-pseudorange and carrier observations from multi-systems and multi-frequencies is expected to be of much benefit for ambiguity resolution (AR). We propose an integrated AR strategy for medium baselines by using the combined GPS and BDS dual/triple-frequency observations. In the method, firstly the extra-wide-lane (EWL) ambiguities of triple-frequency system, i.e., BDS, are determined first. Then the dual-frequency WL ambiguities of BDS and GPS were resolved with the geometry-based model by using the BDS ambiguity-fixed EWL observations. After that, basic (i.e., L1/L2 or B1/B2) ambiguities of BDS and GPS are estimated together with the so-called ionosphere-constrained model, where the ambiguity-fixed WL observations are added to enhance the model strength. During both of the WL and basic AR, a partial ambiguity fixing (PAF) strategy is adopted to weaken the negative influence of new-rising or low-elevation satellites. Experiments were conducted and presented, in which the GPS/BDS dual/triple-frequency data were collected in Nanjing and Zhengzhou of China, with the baseline distance varying from about 28.6 to 51.9 km. The results indicate that, compared to the single triple-frequency BDS system, the combined system can significantly enhance the AR model strength, and thus improve AR performance for medium baselines with a 75.7% reduction of initialization time on average. Besides, more accurate and stable positioning results can also be derived by using the combined GPS/BDS system.

  19. Evidence of accelerated evolution and ectodermal-specific expression of presumptive BDS toxin cDNAs from Anemonia viridis.

    Science.gov (United States)

    Nicosia, Aldo; Maggio, Teresa; Mazzola, Salvatore; Cuttitta, Angela

    2013-10-30

    Anemonia viridis is a widespread and extensively studied Mediterranean species of sea anemone from which a large number of polypeptide toxins, such as blood depressing substances (BDS) peptides, have been isolated. The first members of this class, BDS-1 and BDS-2, are polypeptides belonging to the β-defensin fold family and were initially described for their antihypertensive and antiviral activities. BDS-1 and BDS-2 are 43 amino acid peptides characterised by three disulfide bonds that act as neurotoxins affecting Kv3.1, Kv3.2 and Kv3.4 channel gating kinetics. In addition, BDS-1 inactivates the Nav1.7 and Nav1.3 channels. The development of a large dataset of A. viridis expressed sequence tags (ESTs) and the identification of 13 putative BDS-like cDNA sequences has attracted interest, especially as scientific and diagnostic tools. A comparison of BDS cDNA sequences showed that the untranslated regions are more conserved than the protein-coding regions. Moreover, the KA/KS ratios calculated for all pairwise comparisons showed values greater than 1, suggesting mechanisms of accelerated evolution. The structures of the BDS homologs were predicted by molecular modelling. All toxins possess similar 3D structures that consist of a triple-stranded antiparallel β-sheet and an additional small antiparallel β-sheet located downstream of the cleavage/maturation site; however, the orientation of the triple-stranded β-sheet appears to differ among the toxins. To characterise the spatial expression profile of the putative BDS cDNA sequences, tissue-specific cDNA libraries, enriched for BDS transcripts, were constructed. In addition, the proper amplification of ectodermal or endodermal markers ensured the tissue specificity of each library. Sequencing randomly selected clones from each library revealed ectodermal-specific expression of ten BDS transcripts, while transcripts of BDS-8, BDS-13, BDS-14 and BDS-15 failed to be retrieved, likely due to under-representation in our

  20. Recognition of colored noise in pseudo-phase space by using BDS statistics

    OpenAIRE

    Vasiuta, K. S.

    2009-01-01

    Algorithm for calculating BDS statistics based on determination of correlation integral is presented. The algorithm is based on statistical significance of correlation dimensionality of a process, represented in pseudo-phase space of the given dimensionality. For the first time a numerical method for classification of random processes by their “color” with using statistical properties of BDS statistics is suggested.

  1. BDS/GPS组合系统定位性能分析%Analysis of positioning performance on combined BDS/GPS system

    Institute of Scientific and Technical Information of China (English)

    张辉; 周田; 李博; 焦诚

    2014-01-01

    本文通过对比分析BDS、GPS、GLONASS、Galileo的发展现状和服务性能,探讨了BDS/GPS组合导航定位的相对优势.从可见性和定位精度方面对BDS/GPS组合系统的定位性能进行了仿真分析,给出了定量分析结果.仿真结果表明,采用BDS/GPS组合系统导航定位能够有效提高用户的定位精度和可见性,研究成果对BDS/GPS组合导航定位的精度验证和工程实现具有一定的参考价值.

  2. Research on BDS/GPS Single Frequency Software Receiver Algorithm%BDS/GPS单频软件接收机算法研究与实现

    Institute of Scientific and Technical Information of China (English)

    郑凯; 郭斐

    2014-01-01

    随着卫星导航定位技术及接收机的发展,软件接收机已成为当前研究的热点之一.根据北斗卫星导航定位系统(BDS)的接口控制文档(ICD),分析了BDS B1I信号,提出了一种基于并行码相位和并行频率捕获的算法,实现了对BDS-B1I/GPS信号的捕获跟踪、导航电文解码.利用HG-SOFTGPS02采集器采集的数据进行BDS/GPS定位,验证了该算法的可行性与合理性.

  3. Preface: BeiDou Navigation Satellite System (BDS)/GNSS+: Recent progress and new applications

    Science.gov (United States)

    Jin, Shuanggen

    2017-02-01

    Nowadays, the new China's BeiDou Navigation Satellite System (BDS) has been developed well. At the end of 2016, over 23 BDS satellites were launched, including five geostationary Earth orbit (GEO) satellites, five inclined geosynchronous orbit (IGSO) satellites and nine medium Earth orbit (MEO) satellites. The current BDS service covers China and most Asia-Pacific regions with accuracy of better than 10 m in positioning, 0.2 m/s in velocity and 50 ns in timing. The BDS with global coverage will be completely established by 2020 with five GEO satellites and 30 MEO satellites. The main function of BDS is the positioning, navigation and timing (PNT) as well as short message communications. Together with the United States' GPS, Russia's GLONASS and the European Union's Galileo system as well as other regional augmentation systems, more new applications of multi-Global Navigation Satellite Systems (GNSS) will be exploited and realized in the next decades.

  4. Modulation of neuronal sodium channels by the sea anemone peptide BDS-I.

    Science.gov (United States)

    Liu, Pin; Jo, Sooyeon; Bean, Bruce P

    2012-06-01

    Blood-depressing substance I (BDS-I), a 43 amino-acid peptide from sea anemone venom, is used as a specific inhibitor of Kv3-family potassium channels. We found that BDS-I acts with even higher potency to modulate specific types of voltage-dependent sodium channels. In rat dorsal root ganglion (DRG) neurons, 3 μM BDS-I strongly enhanced tetrodotoxin (TTX)-sensitive sodium current but weakly inhibited TTX-resistant sodium current. In rat superior cervical ganglion (SCG) neurons, which express only TTX-sensitive sodium current, BDS-I enhanced current elicited by small depolarizations and slowed decay of currents at all voltages (EC(50) ∼ 300 nM). BDS-I acted with exceptionally high potency and efficacy on cloned human Nav1.7 channels, slowing inactivation by 6-fold, with an EC(50) of approximately 3 nM. BDS-I also slowed inactivation of sodium currents in N1E-115 neuroblastoma cells (mainly from Nav1.3 channels), with an EC(50) ∼ 600 nM. In hippocampal CA3 pyramidal neurons (mouse) and cerebellar Purkinje neurons (mouse and rat), BDS-I had only small effects on current decay (slowing inactivation by 20-50%), suggesting relatively weak sensitivity of Nav1.1 and Nav1.6 channels. The biggest effect of BDS-I in central neurons was to enhance resurgent current in Purkinje neurons, an effect reflected in enhancement of sodium current during the repolarization phase of Purkinje neuron action potentials. Overall, these results show that BDS-I acts to modulate sodium channel gating in a manner similar to previously known neurotoxin receptor site 3 anemone toxins but with different isoform sensitivity. Most notably, BDS-I acts with very high potency on human Nav1.7 channels.

  5. Combined GPS + BDS for short to long baseline RTK positioning

    Science.gov (United States)

    Odolinski, R.; Teunissen, P. J. G.; Odijk, D.

    2015-04-01

    The BeiDou Navigation Satellite System (BDS) has become fully operational in the Asia-Pacific region and it is of importance to evaluate what BDS brings when combined with the Global Positioning System (GPS). In this contribution we will look at the short, medium and long single-baseline real-time kinematic (RTK) positioning performance. Short baseline refers to when the distance between the two receivers is at most a few kilometers so that the relative slant ionospheric and tropospheric delays can be assumed absent, whereas with medium baseline we refer to when the uncertainty of these ionospheric delays can reliably be modeled as a function of the baseline length. With long baseline we refer to the necessity to parameterize the ionospheric delays and (wet) Zenith Tropospheric Delay (ZTD) as completely unknown. The GNSS real data are collected in Perth, Australia. It will be shown that combining the two systems allows for the use of higher than customary elevation cut-off angles. This can be of particular benefit in environments with restricted satellite visibility such as in open pit mines or urban canyons.

  6. A Good Neighborhood for Cells: Bioreactor Demonstration System (BDS-05)

    Science.gov (United States)

    Chung, Leland W. K.; Goodwin, Thomas J. (Technical Monitor)

    2002-01-01

    Good neighborhoods help you grow. As with a city, the lives of a cell are governed by its neighborhood connections Connections that do not work are implicated in a range of diseases. One of those connections - between prostate cancer and bone cells - will be studied on STS-107 using the Bioreactor Demonstration System (BDS-05). To improve the prospects for finding novel therapies, and to identify biomarkers that predict disease progression, scientists need tissue models that behave the same as metastatic or spreading cancer. This is one of several NASA-sponsored lines of cell science research that use the microgravity environment of orbit in an attempt to grow lifelike tissue models for health research. As cells replicate, they "self associate" to form a complex matrix of collagens, proteins, fibers, and other structures. This highly evolved microenvironment tells each cell who is next door, how it should grow arid into what shapes, and how to respond to bacteria, wounds, and other stimuli. Studying these mechanisms outside the body is difficult because cells do not easily self-associate outside a natural environment. Most cell cultures produce thin, flat specimens that offer limited insight into how cells work together. Ironically, growing cell cultures in the microgravity of space produces cell assemblies that more closely resemble what is found in bodies on Earth. NASA's Bioreactor comprises a miniature life support system and a rotating vessel containing cell specimens in a nutrient medium. Orbital BDS experiments that cultured colon and prostate cancers have been highly promising.

  7. The Long-term Performance Analysis for On-board Atomic Clocks of BDS

    Directory of Open Access Journals (Sweden)

    WANG Yupu

    2017-02-01

    Full Text Available BeiDou Navigation Satellite System (BDS has begun to provide regional services since the end of 2012. It plays an important role in analyzing the long-term performance of BDS satellite clocks in evaluating the performance of the whole system, determining and predicting satellite clock bias (SCB etc. Precise satellite clock data products derived from multi-satellite orbit determination are used to conduct the performance analysis of BDS satellite clocks. Specifically, the characteristics of SCB data are discussed by using a proposed modified median absolute deviation (MAD to preprocess original SCB data. Long-term variations of satellite clocks' phase, frequency, frequency drift and model noise level are analyzed based on the quadratic polynomial SCB model. Frequency stability of BDS satellite clocks is calculated and discussed based on Overlapping Hadamard Variance. Periodicity of BDS SCB is analyzed by using spectral analysis method. Integrating the above mentioned discussions and corresponding experiment results, the long-term performance of BDS satellite clocks is relatively comprehensively evaluated and analyzed. In addition, some valuable conclusions are obtained. For example, in the aspects of noise characteristics and clock drift, the performance of MEO satellite clocks is the best, followed by the IGSO satellite clocks, and the GEO satellite clocks' performance is the worst. The average values of noise level and frequency drift of BDS satellite clocks are respectively 0.677 ns and 1.922×10-18. There are also obvious periodic terms in BDS SCB data derived from multi-satellite orbit determination and their primary periods are approximate equal or one-half to the corresponding satellite orbit periods. The average value of frequency stability of BDS satellite clocks is 1.484×10-13.

  8. Irradiation effect of nano-bubble dispersion strengthened (N-BDS) alloy

    Energy Technology Data Exchange (ETDEWEB)

    Oono, Naoko, E-mail: n-oono@eng.hokudai.ac.jp [Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan); Kawano, Ryohei [Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan); Shi, Shi, E-mail: shishiamy@gmail.com [Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan); Ukai, Shigeharu, E-mail: s-ukai@eng.hokudai.ac.jp [Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan); Hayashi, Shigenari, E-mail: hayashi@eng.hokudai.ac.jp [Faculty of Engineering, Hokkaido University, Kita 13, Nishi 8, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan); Kondo, Sosuke, E-mail: kondo@iae.kyoto-u.ac.jp [Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan); Hashitomi, Okinobu, E-mail: o-hashitomi@iae.kyoto-u.ac.jp [Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan); Kimura, Akihiko, E-mail: kimura@iae.kyoto-u.ac.jp [Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan)

    2013-11-15

    Nano-bubble dispersion strengthened (N-BDS) Fe was made from Fe and polymethylmethacrylate (PMMA) powder and irradiated by 6.4 MeV Fe{sup 3+} ions to investigate the cavity strengthening and the bubble to void evolution. The bubbles accelerated the irradiation-induced cavity growth. The hardness of the N-BDS Fe was 500 MPa higher than that of unalloyed Fe and the hardness increased by irradiation, while that of unalloyed Fe did not increase. Cavity is probably the origin of the irradiation hardening of N-BDS Fe.

  9. Discontinuities of BFKL amplitudes and the BDS ansatz

    Directory of Open Access Journals (Sweden)

    V.S. Fadin

    2015-12-01

    Full Text Available We perform an examination of discontinuities of multiple production amplitudes, which are required for further development of the BFKL approach. It turns out that the discontinuities of 2→2+n amplitudes obtained in the BFKL approach contradict to the BDS ansatz for amplitudes with maximal helicity violation in N=4 supersymmetric Yang–Mills theory with large number of colors starting with n=2. Explicit expressions for the discontinuities of the 2→3 and 2→4 amplitudes in the invariant mass of pairs of produced gluons are obtained in the planar N=4 SYM in the next-to-leading logarithmic approximation. These expressions can be used for checking the conjectured duality between the light-like Wilson loops and the MHV amplitudes.

  10. Discontinuites of BFKL amplitudes and the BDS ansatz

    CERN Document Server

    Fadin, V S

    2015-01-01

    We perform an examination of discontinuities of multiple production amplitudes, which are required for further development of the BFKL approach. It turns out that the discontinuities of 2 $\\to$ 2 + n amplitudes obtained in the BFKL approach contradict to the BDS ansatz for amplitudes with maximal helicity violation in N = 4 supersymmetric Yang-Mills theory with large number of colours starting with n = 2. Explicit expressions for the discontinuities of the 2 $\\to$ 3 and 2 $\\to$ 4 amplitudes in the invariant mass of pairs of produced gluons are obtained in the planar N=4 SYM in the next-to-leading logarithmic approximation. These expressions can be used for checking the conjectured duality between the light-like Wilson loops and the MHV amplitudes.

  11. Discontinuities of BFKL amplitudes and the BDS ansatz

    Science.gov (United States)

    Fadin, V. S.; Fiore, R.

    2015-12-01

    We perform an examination of discontinuities of multiple production amplitudes, which are required for further development of the BFKL approach. It turns out that the discontinuities of 2 → 2 + n amplitudes obtained in the BFKL approach contradict to the BDS ansatz for amplitudes with maximal helicity violation in N = 4 supersymmetric Yang-Mills theory with large number of colors starting with n = 2. Explicit expressions for the discontinuities of the 2 → 3 and 2 → 4 amplitudes in the invariant mass of pairs of produced gluons are obtained in the planar N = 4 SYM in the next-to-leading logarithmic approximation. These expressions can be used for checking the conjectured duality between the light-like Wilson loops and the MHV amplitudes.

  12. Improving Ambiguity Resolution for Medium Baselines Using Combined GPS and BDS Dual/Triple-Frequency Observations

    Science.gov (United States)

    Gao, Wang; Gao, Chengfa; Pan, Shuguo; Wang, Denghui; Deng, Jiadong

    2015-01-01

    The regional constellation of the BeiDou navigation satellite system (BDS) has been providing continuous positioning, navigation and timing services since 27 December 2012, covering China and the surrounding area. Real-time kinematic (RTK) positioning with combined BDS and GPS observations is feasible. Besides, all satellites of BDS can transmit triple-frequency signals. Using the advantages of multi-pseudorange and carrier observations from multi-systems and multi-frequencies is expected to be of much benefit for ambiguity resolution (AR). We propose an integrated AR strategy for medium baselines by using the combined GPS and BDS dual/triple-frequency observations. In the method, firstly the extra-wide-lane (EWL) ambiguities of triple-frequency system, i.e., BDS, are determined first. Then the dual-frequency WL ambiguities of BDS and GPS were resolved with the geometry-based model by using the BDS ambiguity-fixed EWL observations. After that, basic (i.e., L1/L2 or B1/B2) ambiguities of BDS and GPS are estimated together with the so-called ionosphere-constrained model, where the ambiguity-fixed WL observations are added to enhance the model strength. During both of the WL and basic AR, a partial ambiguity fixing (PAF) strategy is adopted to weaken the negative influence of new-rising or low-elevation satellites. Experiments were conducted and presented, in which the GPS/BDS dual/triple-frequency data were collected in Nanjing and Zhengzhou of China, with the baseline distance varying from about 28.6 to 51.9 km. The results indicate that, compared to the single triple-frequency BDS system, the combined system can significantly enhance the AR model strength, and thus improve AR performance for medium baselines with a 75.7% reduction of initialization time on average. Besides, more accurate and stable positioning results can also be derived by using the combined GPS/BDS system. PMID:26528977

  13. Improving Ambiguity Resolution for Medium Baselines Using Combined GPS and BDS Dual/Triple-Frequency Observations

    Directory of Open Access Journals (Sweden)

    Wang Gao

    2015-10-01

    Full Text Available The regional constellation of the BeiDou navigation satellite system (BDS has been providing continuous positioning, navigation and timing services since 27 December 2012, covering China and the surrounding area. Real-time kinematic (RTK positioning with combined BDS and GPS observations is feasible. Besides, all satellites of BDS can transmit triple-frequency signals. Using the advantages of multi-pseudorange and carrier observations from multi-systems and multi-frequencies is expected to be of much benefit for ambiguity resolution (AR. We propose an integrated AR strategy for medium baselines by using the combined GPS and BDS dual/triple-frequency observations. In the method, firstly the extra-wide-lane (EWL ambiguities of triple-frequency system, i.e., BDS, are determined first. Then the dual-frequency WL ambiguities of BDS and GPS were resolved with the geometry-based model by using the BDS ambiguity-fixed EWL observations. After that, basic (i.e., L1/L2 or B1/B2 ambiguities of BDS and GPS are estimated together with the so-called ionosphere-constrained model, where the ambiguity-fixed WL observations are added to enhance the model strength. During both of the WL and basic AR, a partial ambiguity fixing (PAF strategy is adopted to weaken the negative influence of new-rising or low-elevation satellites. Experiments were conducted and presented, in which the GPS/BDS dual/triple-frequency data were collected in Nanjing and Zhengzhou of China, with the baseline distance varying from about 28.6 to 51.9 km. The results indicate that, compared to the single triple-frequency BDS system, the combined system can significantly enhance the AR model strength, and thus improve AR performance for medium baselines with a 75.7% reduction of initialization time on average. Besides, more accurate and stable positioning results can also be derived by using the combined GPS/BDS system.

  14. Positioning Accuracy Analysis of GPS/BDS/GLONASS Network RTK Based on DREAMNET

    Directory of Open Access Journals (Sweden)

    YAO Yibin

    2016-09-01

    Full Text Available With BDS being continually providing service in the Asia-Pacific Region, GLONASS being fully operational with 24 satellites in orbit again and GPS modernization, multi-GNSS network RTK will become the development trend of network RTK in the future. The data of multi-GNSS will be process by data reserving, editing and managing system of network RTK (DREAMNET, which developed independently by this research group, to analyze and compare the positioning accuracy between different combinations of global navigation satellite system. According to the experiment, the positioning accuracy of GPS/BDS/GLONASS network RTK and GPS/BDS network RTK is highest, GPS and BDS only second. Besides, with the increasing of the cut-off elevation, the availability of single GPS network RTK significantly reduces. However with 40°cut-off elevations, positioning service with the accuracy of 0.005m in horizontal, 0.025m in vertical will be provided by GPS/BDS/GLONASS network RTK in 99.84% time of a day. Finally, the statistics of positioning accuracy for 15days show that the accuracy of 0.01m in horizontal, 0.025m in vertical could be reached in six situations, which including BDS and BDS/GLONASS network RTK. Besides, the accuracy of 0.006m in horizontal, 0.015m in vertical could be reached by GPS/BDS/GLONASS network RTK, proving that the positioning accuracy and stability of DREAMNET can meet the needs of surveying and mapping.

  15. Determination of Structural Parameters of Thin-Film Photocatalytic Materials by BDS

    Science.gov (United States)

    Korte, Dorota; Franko, Mladen

    2015-09-01

    A method for determination of structural parameters of some thin-film photocatalytic materials is presented. The analysis was based on the material's thermal parameter dependences on its surface structure or porosity and was thus performed by the use of beam deflection spectroscopy (BDS) supported by theoretical analysis made in the framework of complex geometrical optics. The results obtained by BDS were than compared with those received on the basis of AFM and SEM measurements and found to be in good agreement.

  16. Earth Rotation Parameter Solutions using BDS and GPS Data from MEGX Network

    Science.gov (United States)

    Xu, Tianhe; Yu, Sumei; Li, Jiajing; He, Kaifei

    2014-05-01

    Earth rotation parameters (ERPs) are necessary parameters to achieve mutual transformation of the celestial reference frame and earth-fix reference frame. They are very important for satellite precise orbit determination (POD), high-precision space navigation and positioning. In this paper, the determination of ERPs including polar motion (PM), polar motion rate (PMR) and length of day (LOD) are presented using BDS and GPS data of June 2013 from MEGX network based on least square (LS) estimation with constraint condition. BDS and GPS data of 16 co-location stations from MEGX network are the first time used to estimate the ERPs. The results show that the RMSs of x and y component errors of PM and PM rate are about 0.9 mas, 1.0 mas, 0.2 mas/d and 0.3 mas/d respectively using BDS data. The RMS of LOD is about 0.03 ms/d using BDS data. The RMSs of x and y component errors of PM and PM rate are about 0.2 mas, 0.2 mas/d respectively using GPS data. The RMS of LOD is about 0.02 ms/d using GPS data. The optimal relative weight is determined by using variance component estimation when combining BDS and GPS data. The accuracy improvements of adding BDS data is between 8% to 20% for PM and PM rate. There is no obvious improvement in LOD when BDS data is involved. System biases between BDS and GPS are also resolved per station. They are very stable from day to day with the average accuracy of about 20 cm. Keywords: Earth rotation parameter; International GNSS Service; polar motion; length of day; least square with constraint condition Acknowledgments: This work was supported by Natural Science Foundation of China (41174008) and the Foundation for the Author of National Excellent Doctoral Dissertation of China (2007B51) .

  17. BDS/GPS relative positioning for long baseline with undifferenced observations

    Science.gov (United States)

    Wang, Min; Cai, Hongzhou; Pan, Zongpeng

    2015-01-01

    Before and after the official beginning of Beidou navigation satellite system (BDS) regional service on December 27, 2012, many applications based on BDS such as real-time kinematic (RTK) and precise point positioning (PPP) with real data have been considered in the literatures. However, lack of precise satellite antenna correction and relatively low quality of BDS orbit and clock product is an obstacle for PPP and relative positioning over long baseline using BDS observations. In this paper, the Double Station Observation Processing (DSOP) method that directly uses undifferenced data is applied to relative positioning. By estimating the satellite clock offsets on-the-fly, the satellite dependent unmodelled error can be compensated. Moreover, the direct use of undifferenced observation makes the method easy to implement and flexible to adapt observations of multiple systems. Experiment results demonstrate that relative positioning based on BDS observations can be achieved at centimeter accuracy level which is better than conventional PPP results with limited computation burden increase. These results also indicate the promising potential of BDS to develop real-time service.

  18. BDS/GPS Positioning Analysis in Various of Cut-off Elevations%不同高度截止角下BDS/GPS定位分析

    Institute of Scientific and Technical Information of China (English)

    田翌君; 赵冬青; 黄志勇; 吴昊

    2015-01-01

    研究了BDS/GPS联合RTK定位的理论和算法,主要包含了BDS/GPS组合系统在不同高度截止角下的可视卫星数与PDOP值的比较;BDS与GPS观测量精度的初步评估;双频联合RTK定位的模糊度解算和定位性能的分析等.得出如下结论:BDS/GPS组合系统的可视卫星数相对单系统明显增多,PDOP值减小,在大高度截止角下,其空间几何强度依然很高;随着高度截止角的增大,BDS与GPS受多路径影响明显减弱,其中GEO卫星受多路径影响最大;BDS观测量精度与GPS相当.BDS/GPS双频联合定位的定位精度相对于GPS或BDS虽没有明显提高,但在大高度截止角下,依然可以成功固定模糊度并实现高精度定位.这将显著改善GPS或BDS单系统双频RTK定位在受遮挡环境下的可用性和可靠性.

  19. Estimation of BDS DCB Combining GIM and Different Zero-mean Constraints

    Directory of Open Access Journals (Sweden)

    YAO Yibin

    2017-02-01

    Full Text Available As the limited number of the BeiDou Navigation Satellite System (BDS satellites and tracking stations currently, it's difficult to attain daily DCBs solution with precisely high accuracy based on BeiDou single system. In order to overcome the weakness above, two different zero-mean constraints for BDS satellites, called constraint one and constraint two, respectively, are used to estimate DCBs of BDS based on BeiDou observations from the multi-GNSS experiment (MGEX network and global ionosphere maps (GIM from the Center for Orbit Determination in Europe (CODE. The results show that the systematic difference of the overall trend under two different constraints is consistent, and the systematic difference of DCBC2I-C7I and DCBC2I-C6I is -3.3 ns and 1.2 ns, respectively. The systematic difference between BDS satellite DCBs and receiver DCBs has the same absolute value, but opposite signs instead. Compared to constraint one, The DCBs estimation of IGSO/MEO satellites under constraint two are more stable (the improvement of satellites DCBC2I-C7I and DCBC2I-C6I STD are up to 21%, 13%, respectively, the stability of IGSO and MEO satellites (STDs are within 0.1 ns, 0.2 ns, respectively is better than that of GEO satellites (STDs are 0.15~0.32 ns. DCB estimation of constraint one is not only consistent with the CAS/DLR products (Bias:-0.4~0.2 ns, but also takes into account the stability of BDS satellites DCB. Under the two different constraints, there is no obvious change in BDS receiver DCBs, meaning that the selection of constraints has no obvious influence on the stability of BDS receivers DCBs. The overall stability of BDS receiver DCBs is better than 1 ns. Due to the accuracy discrepancy of GIM in different latitudes, the stability of BDS receiver DCBs in the middle-high latitude (STDs are within 0.4 ns is better than that in low latitude region (STDs are 0.8~1 ns.

  20. Modeling and Assessment of GPS/BDS Combined Precise Point Positioning.

    Science.gov (United States)

    Chen, Junping; Wang, Jungang; Zhang, Yize; Yang, Sainan; Chen, Qian; Gong, Xiuqiang

    2016-07-22

    Precise Point Positioning (PPP) technique enables stand-alone receivers to obtain cm-level positioning accuracy. Observations from multi-GNSS systems can augment users with improved positioning accuracy, reliability and availability. In this paper, we present and evaluate the GPS/BDS combined PPP models, including the traditional model and a simplified model, where the inter-system bias (ISB) is treated in different way. To evaluate the performance of combined GPS/BDS PPP, kinematic and static PPP positions are compared to the IGS daily estimates, where 1 month GPS/BDS data of 11 IGS Multi-GNSS Experiment (MGEX) stations are used. The results indicate apparent improvement of GPS/BDS combined PPP solutions in both static and kinematic cases, where much smaller standard deviations are presented in the magnitude distribution of coordinates RMS statistics. Comparisons between the traditional and simplified combined PPP models show no difference in coordinate estimations, and the inter system biases between the GPS/BDS system are assimilated into receiver clock, ambiguities and pseudo-range residuals accordingly.

  1. BDS relative static positioning over long baseline improved by GEO multipath mitigation

    Science.gov (United States)

    Wang, Min; Chai, Hongzhou; Liu, Jun; Zeng, Anmin

    2016-02-01

    Due to the satellite and constellation deployment design, the variation pattern of multipath effect in BeiDou Navigation Satellite System (BDS) code observation is different from GPS. The amplitude of systematic multipath variation (SMV) exists in multipath combination series may exceed 0.5 m for some geostationary earth orbit (GEO) satellites, which is larger than the normal noise level of GPS code observation. After characterization of the variation pattern of BDS multipath series for BDS GEO satellites, we propose to improve the performance of relative positioning over long baseline by mitigating the SMV effect of GEO satellite. The proposed method uses the SMV extracted from multipath (MP) combination series with adaptive wavelet transform as correction for current day observation in post-processing use or as following day correction in real-time use. In addition, the Double Station Observation Processing (DSOP) method that directly uses undifferenced observation is applied for relative static positioning. Experiment results show improvement in convergence speed for both BDS only and BDS/GPS combined solution.

  2. The Proposal of a BDS Syllabus Framework to Suit Choice Based Credit System (CBCS)

    Science.gov (United States)

    Sethuraman, KR; Narayan, KA

    2016-01-01

    Introduction Higher education takes a new dimension universally in the form of choice based Credit System (CBCS). In India, the University Grants Commission (UGC) has made CBCS mandatory in all fields except for Health Profession. Not much attempts were made in designing a BDS syllabus to suit CBCS. Aim Aim of the study was to propose a model dental syllabus to fit into choice based credit system. Materials and Methods A model BDS syllabus Prototype for CBCS was designed based on the UGC guidelines for terms as well as calculations for CBCS. Engineering curriculum models from IIT and Anna University were also referred to. Results Semester based BDS syllabus was designed without changing the norms of Dental Council of India (DCI). All the must know areas of the subjects were considered as “core” areas and the desirable and nice to know areas are left for “electives” by the students. By this method, none of the subject was left out at the same time students are provided with electives to learn deeper on their topics of choice. Conclusion The existing BDS syllabus can be effectively modified by incorporating few changes based on the UGC regulations for Choice based credit system. The proposed framework gives an insight on the nature of modifications that are needed. By adopting this, BDS Course regulations can also follow CBCS without neglecting or reducing the weightage of any subject. PMID:27656467

  3. BDS/GPS单频软件接收机算法研究与实现

    Institute of Scientific and Technical Information of China (English)

    郑凯; 郭斐

    2014-01-01

    随着卫星导航定位技术及接收机的发展,软件接收机已成为当前研究的热点之一。根据北斗卫星导航定位系统(BDS)的接口控制文档(ICD),分析了BDS B1I信号,提出了一种基于并行码相位和并行频率捕获的算法,实现了对BDS-B1I/GPS信号的捕获跟踪、导航电文解码。利用HG-SOFTGPS02采集器采集的数据进行BDS/GPS定位,验证了该算法的可行性与合理性。

  4. BDS/GPS Dual Systems Positioning Based on the Modified SR-UKF Algorithm.

    Science.gov (United States)

    Kong, JaeHyok; Mao, Xuchu; Li, Shaoyuan

    2016-05-03

    The Global Navigation Satellite System can provide all-day three-dimensional position and speed information. Currently, only using the single navigation system cannot satisfy the requirements of the system's reliability and integrity. In order to improve the reliability and stability of the satellite navigation system, the positioning method by BDS and GPS navigation system is presented, the measurement model and the state model are described. Furthermore, the modified square-root Unscented Kalman Filter (SR-UKF) algorithm is employed in BDS and GPS conditions, and analysis of single system/multi-system positioning has been carried out, respectively. The experimental results are compared with the traditional estimation results, which show that the proposed method can perform highly-precise positioning. Especially when the number of satellites is not adequate enough, the proposed method combine BDS and GPS systems to achieve a higher positioning precision.

  5. Convergence Time and Positioning Accuracy Comparison between BDS and GPS Precise Point Positioning

    Directory of Open Access Journals (Sweden)

    ZHANG Xiaohong

    2015-03-01

    Full Text Available BDS/GPS data from MGEX were processed by TriP 2.0 software developed at Wuhan University. Both static and kinematic float PPP are tested by adopting precise satellite orbits and clocks provided by Research Center of GNSS, Wuhan University. The results show that the convergence time of BDS static PPP is about 80min while kinematic PPP is about 100min. For 3h observations, static positioning accuracy of 5 cm and kinematic positioning accuracy of 8 cm in horizontal, about 12 cm in vertical can be achieved. Similar to GPS PPP, precision in east component is worse than north. At present, BDS PPP needs longer convergence time than GPS PPP to reach an absolute positioning accuracy of cm~dm due to the lack of global tracking stations and the limited accuracy of orbit and clock products.

  6. BDS/GPS Dual Systems Positioning Based on the Modified SR-UKF Algorithm

    Directory of Open Access Journals (Sweden)

    JaeHyok Kong

    2016-05-01

    Full Text Available The Global Navigation Satellite System can provide all-day three-dimensional position and speed information. Currently, only using the single navigation system cannot satisfy the requirements of the system’s reliability and integrity. In order to improve the reliability and stability of the satellite navigation system, the positioning method by BDS and GPS navigation system is presented, the measurement model and the state model are described. Furthermore, the modified square-root Unscented Kalman Filter (SR-UKF algorithm is employed in BDS and GPS conditions, and analysis of single system/multi-system positioning has been carried out, respectively. The experimental results are compared with the traditional estimation results, which show that the proposed method can perform highly-precise positioning. Especially when the number of satellites is not adequate enough, the proposed method combine BDS and GPS systems to achieve a higher positioning precision.

  7. 盐地碱蓬的染色体核型分析%Karyotype analysis of Suaeda salsa (L.) Pall

    Institute of Scientific and Technical Information of China (English)

    张峰; 姚燕

    2013-01-01

    The paper originally analyzes the number of chromosomes and karyotype of Suaeda salsa (L. ) Pall. Results show that its chromosome number is 2n =18, and that its karyotype formula is K(2n) =2x = 18 = 16m +2sm. The karyotype is 1A based on the classification standard of Stebbins.%本文首次对盐地碱蓬(Suaeda salsa(L.)Pall.)的染色体数目和核型进行了分析研究.结果表明,盐地碱蓬的染色体数目2n=18,核型公式为K(2n)=18=16m +2sm.根据Stebbins的核型分类标准,盐地碱蓬的核型属1A型.

  8. 白芍的化学成分研究%A study on the chemical constituents of Paeonia lactiflora Pall

    Institute of Scientific and Technical Information of China (English)

    张晓燕; 王金辉; 李铣

    2001-01-01

    Five compounds were isolated from Paeonia lactiflora Pall.. Theywere identified as paeoniflorin(1),benzoylpaeoniflorin(2),galloylpaeoniflorin(3),1,2,3,4,6-galloyl glucose(4) and daucosterol(5).%从白芍(PaeonialactifloraPall.)的干燥根中分离得到5个化合物,经理化常数和光谱分析分别鉴定为芍药苷(1)、苯甲酰芍药苷(2)、没食子酰芍药苷(3)、1,2,3,4,6-五没食子酰基葡萄糖(4)和胡萝卜苷(5)。

  9. Cultivars of Medicinal Paeonia Lactiflora Pall.in China%中国药用芍药栽培品种

    Institute of Scientific and Technical Information of China (English)

    查良平; 王德群; 彭华胜; 杨俊

    2011-01-01

    Objective To investigate into the cultivars of medicinal Paeonia lactiflora Pall. from four genuine producing areas in China. Methods Four genuine producing areas of medicinal paeonia lactiflora Pall. in China were investigated, such as Bozhou in Anhui province, Heze in Shandong province, Zhongjiang in Sichuan province, and Pan’an in Zhejiang province. Germplasm of Paeonia Radix Alba in these areas were researched. Results There were six cultivars of Paeoniae lactiflora Pall. in China, namely, P. lactiflora ‘ Bozhoushaoyao ’ , P. lactiflora ‘ Hezeshaoyao ’ , P. lacti.flora ‘ Baihuachuanshaoyao ’ , P. lactiflora ‘ Honghuachuanshaoyao’ , P. lactiflora ‘ Baihuahangshaoyao ’ , and P. lactiflora ‘Honghuahangshaoyao’. The taxa key of the six cultivars was reported. Conslusion As Didao herbs, "Baishao" were derived from different cultivars of P. lactiflora Pall. .%目的 调查四大地道产区药用芍药的栽培品种.方法 对安徽亳州、山东菏泽、四川中江和浙江磐安的药用芍药进行标本研究.结果 目前我国药用芍药有6个栽培品种,分别为亳州芍药Paeonia lactiflora ‘Bozhoushaoyao'、菏泽芍药Paeonia lactiflora ‘Hezeshaoyao'、白花川芍药Paeonia lactiflora ‘Baihuachuanshaoyao'、红花川芍药Paeonia lactiflora ‘Honghuachuanshaoyao'、白花杭芍药Paeonia lactiflora ‘Baihuahangshaoyao'和红花杭芍药Paeonia lactiflora ‘Honghuahangshaoyao'.列出了6个栽培品种的分类检索表.结论 地道药材白芍来源于不同的栽培品种.

  10. Solution and Precision Analysis on Combined GPS/BDS Relative Positioning%GPS/BDS 组合相对定位解算及精度分析

    Institute of Scientific and Technical Information of China (English)

    吕金浩; 吕志伟; 杨剑伟; 王兵浩

    2014-01-01

    随着全球卫星导航系统的不断发展,多模导航定位已成为研究热点。本文对G PS/BDS组合相对定位的原理进行了阐述,编写了相关软件实现了G PS/BDS组合相对定位功能,并通过实测数据进行处理和分析,验证了方法的正确性。结果表明:在短基线下,北斗区域卫星导航系统相对定位精度可达毫米级,与G PS相当,组合系统定位精度在水平方向上有所提高,且稳定性好。%With the continuous development of global satellite navigation system ,multi-mode navigation has become a hot topic .This paper describes the principles of combined GPS/BDS relative positioning and program related software to achieve the function .By pro-cessing and analyzing the measured data ,the results verify the correctness of the method and show that :For the short baseline ,the relative positioning accuracy of regional BDS achieves Millimeter level and the same as GPS .The accuracy of combined GPS/BDS relative positio-ning is improved in a horizontal direction ,and combined GPS/BDS has a good stability .

  11. Study on stochastic models of BDS/GPS short-baseline solution%BDS/GPS短基线解算的随机模型研究

    Institute of Scientific and Technical Information of China (English)

    陈浩; 许长辉; 宋现锋; 孙伟

    2016-01-01

    针对BDS轨道高度存在差异进而影响短基线解算结果的问题,该文利用两组实测数据,研究BDS和BDS/GPS组合系统的短基线解算精度及可靠性,并探讨4种随机模型的性能.结果表明,BDS和BDS/GPS组合系统短基线解算精度能够达到厘米级,且模糊度解算的可靠性更高;4种随机模型性能相当,随着基线长度增加,MINQUE模型的优势降低;不同类型卫星轨道高度差异较大,高度角模型不适宜BDS和BDS/GPS组合系统短基线解算.

  12. Comparative analysis on ill-posedness in BDS/GPS carrier phase positioning%BDS/GPS载波相位定位病态性对比分析

    Institute of Scientific and Technical Information of China (English)

    邱晓璐; 刘根友; 段鹏硕; 王彬彬; 沙文东

    2015-01-01

    针对BDS/GPS载波相位定位的病态性问题,该文提出了采用条件数法对比分析BDS/GPS在我国不同地区、不同时段载波相位定位病态性及其在8个地面站的定位精度因子PDOP值变化情况,其中PDOP值能够反映单点定位的病态性.研究结果表明:BDS在我国大部分地区可用性良好,且其平均PDOP值随纬度的增大而线性增加;然而,BDS导航定位的病态性程度比GPS更为严重,BDS载波相位定位病态性程度不仅随观测时长变化,还与所处的位置变化有关,而GPS几乎不受观测地点的影响.研究成果可在BDS/GPS模糊度的快速、准确固定方面提供参考.

  13. Research on the BDS PPP Realizability and Precision in Sichuan Province%四川省BDS PPP可行性及精度分析

    Institute of Scientific and Technical Information of China (English)

    张晶晶; 向常淦; 张芯; 包海; 秘金钟; 左虎

    2014-01-01

    随着北斗系统(BDS)为亚太地区提供服务,我国北斗系统双频精密单点定位(PPP)的可行性与定位精度有待研究,为此本文首先探究了BDS 双频无电离层组合PPP算法及卡尔曼滤波参数估计策略,并在此基础上开发相应数据处理软件,对四川连续运行参考站的 BDS 观测数据进行处理分析,结果表明 BDS 可以在四川省实现PPP,其平面精度5cm以内,高程精度10cm以内,定位精度目前不及GPS PPP。

  14. Validation and analysis of the performance of dual-frequency single-epoch BDS/GPS/GLONASS relative positioning%BDS/GPS/GLONASS组合的双频单历元相对定位性能对比分析

    Institute of Scientific and Technical Information of China (English)

    汪亮; 李子申; 袁洪; 周凯

    2015-01-01

    随着我国北斗卫星导航系统(BeiDou Navigation Satellite System,BDS)的建成与运行,目前具备独立服务能力的系统包括GPS,GLONASS和BDS,多系统组合已成为GNSS导航定位发展的必然趋势.基于伪距或载波相位的相对定位是目前利用GNSS实现高精度定位的主要技术手段之一.本文重点分析对比了BDS/GPS/GLONASS单系统、双系统以及三系统组合共7种模式下双频伪距和单历元载波相位相对定位性能.结果表明:(1) BDS/GPS/GLONASS组合伪距和单历元载波相位相对定位时,三系统观测值误差比分别设为1∶1∶2和1∶1∶1较合适;(2) BDS/GPS组合的性能要优于GPS/GLONASS以及BDS/GLONASS组合,BDS/GPS/GLONASS三系统组合较双系统组合可进一步改善定位性能;(3)短基线条件下(<20 km),BDS/GPS/GLONASS组合伪距和单历元载波相位相对定位精度较单BDS,GPS,GLONASS系统分别提高了48.4%,31.7%,65.7%和6.1%,12.5%,39.4%.

  15. Simultaneous quantification of 11 isoquinoline alkaloids in Corydalis impatiens (Pall.) Fisch by HPLC.

    Science.gov (United States)

    Niu, Xiaofeng; Li, Weifeng; Xu, Hongbo; Liu, Xia; Qi, Lin

    2013-07-01

    Isoquinoline alkaloids are the primary active ingredients of Corydalis, but an analytical method for quality assessment of the active ingredients in Corydalis impatiens (Pall). Fisch has not been reported. A new, simple, and multiple-component quantification method was developed for the simultaneous quantification of 11 isoquinoline alkaloids including capnoidine, chelianthifoline, bicuculline, protopine, isoapocavidine, apocavidine, cavidine, tetrahydroepiberberine, ochotensimine, tetrahydrocoptisine, and tetrahydrocorysamine in C. impatiens. Separation of the isoquinoline alkaloids was performed on a RP C18 column (150 × 4.6 mm, 5 μm) with potassium dihydrogen phosphate buffer (pH 2.5, adjusted by phosphoric acid)/acetonitrile (53:47, v/v) containing 0.3% sodium dodecyl sulfonate. The flow rate and detection wavelength were set at 1 mL/min and 295 nm, respectively. Full validation of the assay was carried out including linearity, precision, accuracy, stability, LOD, and limit of quantitation. All calibration curves showed a good linear relationship (r > 0.999) in test range. The results demonstrated that the developed method was reliable, rapid, and specific. Six batches of C. impatiens samples from different sources were determined using the established method. The contents of alkaloids ranged from 11.68 to 351.83 μg/g. This method can be applied for quality evaluation and control of C. impatiens. Eleven isoquinoline alkaloids were first reported on simultaneous determination with HPLC.

  16. Isolation and Simultaneous Quantification of Nine Triterpenoids from Rosa davurica Pall.

    Science.gov (United States)

    Huo, Yayu; Gao, Yang; Mi, Jie; Wang, Xinrui; Jiang, Huimin; Zhang, Hailong

    2017-02-01

    Rosa davurica Pall. has been used as a traditional Oroqen medicine to treat dyspepsia, gastroenterologia, menoxenia and other diseases. In this study, the chemical constituents research on the fruit pulp of R. davurica led to the isolation and identification of nine bioactive pentacyclic triterpenoids and five of them were isolated from the plant for the first time. Subsequently a simple and rapid high-performance liquid chromatography (HPLC) method was established for the simultaneous quantification of the nine triterpenoids. The separation was performed on a Merges reverse phase (RP) C18 (250 × 4.6 mm, 5 μm) column through 40 min gradient delivery of 0.05% phosphoric acid aqueous solution and acetonitrile at a flow rate of 1.2 mL/min at 30°C and the detection wavelength selected was 210 nm. All of the calibration curves showed good linearity (R(2) > 0.9990) in the tested ranges. The limit of detection and the limit of quantitation were in the range of 0.21-1.27 μg/mL and 0.63-3.80 μg/mL, respectively. The established method also showed good precision, repeatability and recovery and can be used to the routine quality control of R. davurica and other herbs containing pentacyclic triterpenoids.

  17. Rhizobium helanshanense sp. nov., a bacterium that nodulates Sphaerophysa salsula (Pall.) DC. in China.

    Science.gov (United States)

    Qin, Wei; Deng, Zhen Shan; Xu, Lin; Wang, Na Na; Wei, Ge Hong

    2012-05-01

    Studying rhizobia in the root nodules of Sphaerophysa salsula (Pall.) DC in the northwest of China, we obtained five strains classified as genus Rhizobium on the basis of their 16S rRNA gene sequences. The sequence similarity of strain CCNWQTX14(T) with the most related species was 99.0%. Further phylogenetic analysis of housekeeping genes (recA and atpD) suggested the five strains comprised a novel lineage within Rhizobium. The nifH and nodD gene sequences of CCNWQTX14(T) were phylogenetically closely related with those of Sinorhizobium kummerowiae and R. sphaerophysae, respectively. The five strains isolated from different places were also distinct from related Rhizobium species using ERIC fingerprint profiles. The DNA-DNA hybridization value was 41.8% between CCNWQTX14(T) and Rhizobium sphaerophysae CCNWGS0238(T). Our novel strains were only able to form effective nodules on its original host Sphaerophysa salsula. Our data showed that the five Rhizobium strains formed a unique genomic species, for which a novel species Rhizobium helanshanense sp. nov. is proposed. The type strain is CCNWQTX14(T) (=ACCC 16237(T) =HAMBI 3083(T)).

  18. Relationship between Major Mineral Nutrient Elements Contents and Flower Colors of Herbaceous Peony (Paeonia Lactiflora Pall.

    Directory of Open Access Journals (Sweden)

    Chengzhong Li

    2015-02-01

    Full Text Available Herbaceous peony (Paeonia lactiflora Pall. is a famous ornamental plant with bright flowers and lush leaves. The flower petal can be used as a fragrant food additive. Understanding the mineral nutrient contents in P. lactiflora is necessary for guiding its cultivation practices as well as its use as a food additive. In this study, we investigated the mineral contents including Calcium (Ca, Potassium (K, Magnesium (Mg, Copper (Cu, iron (Fe and Zinc (Zn in petals and leaves of 20 selected herbaceous peony cultivars in four groups according to their flower colors and the relationship between major mineral nutrient elements contents and flower colors was assessed. In petals, the contents of minerals were in this order K>Ca>Mg>Fe>Zn>Cu; while in leaves were: Ca>K>Mg>Fe>Zn>Cu. Major element contents in petals and leaves among 4 cultivar groups were different at statistically significant levels. Petals in red or purple have higher amount of most major minerals than those in white or pink colors. The wide range of mineral element contents among cultivars is attributed to genotypic variations. The correlations of major mineral elements in the petals and leaves of herbaceous peony cultivars indicate that mineral ions compete for the same absorption sites. The results provided some scientific support for petal nutrition of herbaceous peony and selecting herbaceous peony flowers with dark colors for edible is feasible.

  19. 赤芍中的单萜类成分%Monoterpenes of Paeonia lactiflora Pall

    Institute of Scientific and Technical Information of China (English)

    王彦志; 冯卫生; 石任兵; 刘斌; 姜艳艳

    2008-01-01

    目的研究毛茛科植物赤药(Paeonia lactiflora Pall.)的化学成分.方法应用色谱技术分离纯化,波谱方法解析结构.结果从赤芍中分离出5个化合物:9-乙基芍药新苷A(1),(1S,2S,4R)-反式-1,8-桉叶素-2-O-(6-O-α-L-鼠李糖基)-β-D-葡萄糖苷(2),(1S,2S,4R)-反式-2-羟基-1,8-桉叶素(3),没食子酸(4),没食子酸乙酯(5).结论化合物1为新的天然产物,2、3为首次从赤芍中分离得到.

  20. Reproduction, aging and mortality rate in social subterranean mole voles (Ellobius talpinus Pall.).

    Science.gov (United States)

    Novikov, E; Kondratyuk, E; Petrovski, D; Titova, T; Zadubrovskaya, I; Zadubrovskiy, P; Moshkin, M

    2015-12-01

    Eusocial subterranean rodents of the Bathyergidae family have enormous longevity. The long lifespan of these species is associated with negligible senescence, that is, an absence of the signs of age-related deterioration in physical condition. The question arises as to whether these features are unique to eusocial Bathyergids or typical of other social subterranean rodents as well. In the present study, we analysed data from observations of a social subterranean Microtinae rodent, the northern mole vole (Ellobius talpinus Pall.), which, like mole-rats, has reproductive skew. Among the individuals captured in the wild and maintained in captivity, females that reproduced lived significantly longer than non-breeding females. We did not find any changes in muscle strength with age in any of the demographic groups studied. Faecal glucocorticoid concentrations before death were significantly higher in non-breeding females than in breeding females and males. Increased adrenocortical activity may be one mechanism responsible for the decreased lifespan of non-reproducing individuals of social subterranean rodents. We conclude that the patterns of aging, although different in some respects, are generally common for social subterranean rodents of different taxonomic groups.

  1. An Accurate Method for the BDS Receiver DCB Estimation in a Regional Network

    Directory of Open Access Journals (Sweden)

    LI Xin

    2016-08-01

    Full Text Available An accurate approach for receiver differential code biases (DCB estimation is proposed with the BDS data obtained from a regional tracking network. In contrast to the conventional methods for BDS receiver DCB estimation, the proposed method does not require a complicated ionosphere model, as long as one reference station receiver DCB is known. The main idea for this method is that the ionosphere delay is highly dependent on the geometric ranges between the BDS satellite and the receiver normally. Therefore, the non-reference station receivers DCBs in this regional area can be estimated using single difference (SD with reference stations. The numerical results show that the RMS of these estimated BDS receivers DCBs errors over 30 days are about 0.3 ns. Additionally, after deduction of these estimated receivers DCBs and knowing satellites DCBs, the extractive diurnal VTEC showed a good agreement with the diurnal VTEC gained from the GIM interpolation, indicating the reliability of the estimated receivers DCBs.

  2. Sensitivity requirements of assisted BDS and GPS in specification 3GPP TS 36.171

    Science.gov (United States)

    Jin, Xiaoxi; Chen, Xin; Ying, Rendong; Yang, Genke

    2016-01-01

    With the needs of growing location-based service, a more high-performance satellite positioning technology - assisted global navigation satellite system (A-GNSS assisted-GNSS) becomes a new hotspot in area of navigation and positioning. Now, 3GPP has already provided supports for GPS, Galileo, GLONASS and QZSS, SBAS, so standardization work of introduction BDS into 3GPP organization is very imperative. In this paper, we first analysis the performance of GPS L1 C/A with assistant information, then by taking into account the difference between BDS and GPS, including the unique nature of GEO/NGEO satellites' navigation message data length and format, we design the sensitivity requirements of BDS B1 following A-GPS. The results between A-GPS and A-BDS of typical sensitivity test cases are shown in this paper, which show that the suggested sensitivity requirements satisfy the minimum performance requirements under technical specification of 3GPP TS 36.171.

  3. Estimating the yaw-attitude of BDS IGSO and MEO satellites

    Science.gov (United States)

    Dai, Xiaolei; Ge, Maorong; Lou, Yidong; Shi, Chuang; Wickert, Jens; Schuh, Harald

    2015-10-01

    Precise knowledge and consistent modeling of the yaw-attitude of GNSS satellites are essential for high-precision data processing and applications. As the exact attitude control mechanism for the satellites of the BeiDou Satellite Navigation System (BDS) is not yet released, the reverse kinematic precise point positioning (PPP) method was applied in our study. However, we confirm that the recent precise orbit determination (POD) processing for GPS satellites could not provide suitable products for estimating BDS attitude using the reverse PPP because of the special attitude control switching between the nominal and the orbit-normal mode. In our study, we propose a modified processing schema for studying the attitude behavior of the BDS satellites. In this approach, the observations of the satellites during and after attitude switch are excluded in the POD processing, so that the estimates, which are needed in the reverse PPP, are not contaminated by the inaccurate initial attitude mode. The modified process is validated by experimental data sets and the attitude yaw-angles of the BDS IGSO and MEO satellites are estimated with an accuracy of better than . Furthermore, the results confirm that the switch is executed when the Sun elevation is about and the actual orientation is very close to its target one. Based on the estimated yaw-angles, a preliminary attitude switch model was established and reintroduced into the POD, yielding to a substantial improvement in the orbit overlap RMS.

  4. Positive and negative ionospheric responses to the March 2015 geomagnetic storm from BDS observations

    Science.gov (United States)

    Jin, Shuanggen; Jin, Rui; Kutoglu, H.

    2017-01-01

    The most intense geomagnetic storm in solar cycle 24 occurred on March 17, 2015, and the detailed ionospheric storm morphologies are difficultly obtained from traditional observations. In this paper, the Geostationary Earth Orbit (GEO) observations of BeiDou Navigation Satellite System (BDS) are for the first time used to investigate the ionospheric responses to the geomagnetic storm. Using BDS GEO and GIMs TEC series, negative and positive responses to the March 2015 storm are found at local and global scales. During the main phase, positive ionospheric storm is the main response to the geomagnetic storm, while in the recovery phase, negative phases are pronounced at all latitudes. Maximum amplitudes of negative and positive phases appear in the afternoon and post-dusk sectors during both main and recovery phases. Furthermore, dual-peak positive phases in main phase and repeated negative phase during the recovery are found from BDS GEO observations. The geomagnetic latitudes corresponding to the maximum disturbances during the main and recovery phases show large differences, but they are quasi-symmetrical between southern and northern hemispheres. No clear zonal propagation of traveling ionospheric disturbances is detected in the GNSS TEC disturbances at high and low latitudes. The thermospheric composition variations could be the dominant source of the observed ionospheric storm effect from GUVI [O]/[N2] ratio data as well as storm-time electric fields. Our study demonstrates that the BDS (especially the GEO) observations are an important data source to observe ionospheric responses to the geomagnetic storm.

  5. The BDS iGMAS RIOS station at Observatório Nacional, Rio de Janeiro

    Science.gov (United States)

    Humberto Andrei, Alexandre; Song, Shuli; Junqueira, Selma; Beauvalet, Laurene

    2016-07-01

    GNSS navigation satellites are currently being developed by all major players in the science and technology scene, to compete with the GPS system. Because their applications span many different areas, from traffic and cargo control, to geodesy and seismic monitoring, it is required to assess the coherence between the different constellations. BDS is the GNSS system currently developed in China. Its first generation of satellites consisted of 3 geostationnary satellites allowing geolocalisation in China only. In addition to these satellites, other satellites have been launched in geostationnary and geosynchronous orbits, as well as satellites orbiting with a classical GNSS semi-major axis. With these additions, the BDS system possesses 19 operating satellites, and though the system is mostly efficient for geolocalisation in Asia, the satellites are also visible in other parts of the globe. In parallel to the development of the BDS constellation, China has launched the iGMAS (International GNSS Monitoring and Assessment Service) project to develop a global tracking network of multi-GNSS geodetic receivers. One of the goals of this project is to evaluate the efficiency of the BDS constellation as well as the efficiency of the receivers developed by the Chinese laboratories. As part of the Brazilian program COSBAN leaded by the Foreign Affairs Ministry to foster up the science and technology partnership with China, materialized by the collaboration between the Shanghai Astronomical Observatory/CAS and the Observatório Nacional/MCTI, in Rio de Janeiro. Through it the RIOS-iGMAS station was installed at Observatório Nacional, where the RJEP GNSS station already operates as part of the Brazilian reference system. Thus at the Observatório Nacional can be observed satellites from any constellation with both systems of reception, leading to a direct, efficient way to compare the results obtained for each network. In this communication we focus on the determination of the

  6. Color suppressed contributions to the decay modes B_{d,s} -> D_{s,d} D_{s,d}, B_{d,s} -> D_{s,d} D^*_{s,d}, and B_{d,s} -> D^*_{s,d} D^*_{s,d}

    OpenAIRE

    Eeg, Jan O.; Fajfer, Svjetlana; Prapotnik, Anita

    2005-01-01

    The amplitudes for decays of the type $B_{d,s} \\to D_{s,d} D_{s,d}$, have no factorizable contributions, while $B_{d,s} \\to D_{s,d} D^*_{s,d}$, and $B_{d,s} \\to D^*_{s,d} D^*_{s,d}$ have relatively small factorizable contributions through the annihilation mechanism. The dominant contributions to the decay amplitudes arise from chiral loop contributions and tree level amplitudes which can be obtained in terms of soft gluon emissions forming a gluon condensate. We predict that the branching rat...

  7. ENVIRONMENTAL TECHNOLOGY VERIFICATION REPORT PHYSICAL REMOVAL OF CRYPTOSPORIDIUM OOCYSTS AND GIARDIA CYSTS IN DRINKING WATER PALL CORPORATION WPM-1 MICROFILTRATION SYSTEM AT PITTSBURGH, PA - NSF 00/09/EPADW395

    Science.gov (United States)

    Verification testing of the Pall Corporation WPM-1 Microfiltration Pilot System was conducted from February 3 to March 5, 1999. The Pall WPM-1 membrane is a hollow fiber type microfiltration membrane made of polyvinylidenefluoride (PVDF). It has a 0.1 micrometer ( m) nominal por...

  8. Anti-inflammatory and immunomodulatory effects of Paeonia lactiflora Pall., a traditional Chinese herbal medicine

    Directory of Open Access Journals (Sweden)

    Dong-Yi eHe

    2011-02-01

    Full Text Available In China, Korea and Japan, a decoction of the dried root without bark of Paeonia lactiflora Pall. has been used in the treatment of rheumatoid arthritis, systemic lupus erythematosus, hepatitis, dysmenorrhea, muscle cramping and spasms, and fever for more than 1200 years. A water/ethanol extract of the root is now known as total glucosides of paeony (TGP, which contains more than 15 components. Paeoniflorin is the most abundant ingredient and accounts for the pharmacological effects observed with TGP in both in vitro and in vivo studies. The analgesic effect of TGP was confirmed in various animal models of pain, which may be mediated partly by adenosine A1 receptor. The direct anti-inflammatory effects of TGP were observed in animal models of both acute and subacute inflammation, by inhibiting the production of prostaglandin E2, leukotrience B4, and nitric oxide, and by suppressing the increase of intracellular calcium ion concentration. TGP was also reported to have protective effects of cells against oxidative stress. In vitro, dual effects of TGP were noted on the proliferation of lymphocytes, differentiation of Th/Ts lymphocytes, and the production of pro-inflammatory cytokines and antibodies. In vivo, TGP inhibited the delayed-type hypersensitivity in immuno-activated mice, and enhanced the delayed-type hypersensitivity in immuno-suppressed mice. In adjuvant arthritis rats, paeoniflorin exerted immunosuppressive effects. The beneficial effects of TGP in treating rheumatoid arthritis were verified by randomized controlled trials. The adverse events of TGP were mainly gastrointestinal tract disturbances, mostly mild diarrhea.

  9. Herbaceous Peony (Paeonia lactiflora Pall. as an Alternative Source of Oleanolic and Ursolic Acids

    Directory of Open Access Journals (Sweden)

    Jun Tao

    2011-01-01

    Full Text Available Oleanolic acid (OA and ursolic acid (UA have been proven to possess many biological activities, and much attention is focused on the search for plants which are rich in OA and UA. In this report, the OA and UA accumulation characteristics were investigated in 47 cultivars of Chinese herbaceous peony (Paeonia lactiflora Pall. and were followed in three cultivars over different developmental stages as measured by high performance liquid chromatography (HPLC. OA and UA levels in leaves and stems demonstrated an overall upward trend from May 1 to September 15 except for UA in the leaves of “Hong Feng”. The maximum values of OA and UA in leaves of “Yangfei Chu Yu”, “Fen Zhu Pan” and “Hong Feng” were 852.98, 575.60, 290.48 μg/g FW and 924.94, 827.36, 432.67 μg/g FW, respectively. The maximum values of OA and UA in stems of “Yangfei Chu Yu”, “Fen Zhu Pan” and “Hong Feng” were 359.28, 90.49, 43.90 μg/g FW and 326.86, 82.25, 56.63 μg/g FW, respectively. OA and UA contents in leaves of 47 different herbaceous peony cultivars ranged from 66.73–618.12 and 36.23–665.14 μg/g FW, respectively, with average values of 171.62 and 227.57 μg/g FW, respectively. The results suggested that the aboveground parts of herbaceous peony may be used as an alternative source of OA and UA for medicinal purposes in addition to its ornamental purposes.

  10. STUDY ON POSITIONING WITH DIFFERENTIAL NETWORK OF BDS/GPS FUSION SYSTEM BASED ON MULTIPLE CORS REFERENCE STATIONS%基于CORS的多基准站BDS/GPS融合差分网定位性能分析

    Institute of Scientific and Technical Information of China (English)

    李鹤峰; 秘金钟; 党亚民; 吴任洪; 王世进; 刘国志

    2014-01-01

    Performance of positioning with differential network of BDS/GPS fusion system was analyzed using pseudo-range information through multiple reference stations differential positioning technology,based on BDS/GPS CORS test system.The experiment results indicate that positioning accuracy with multiple reference station BDS/GPS fusion system of single epoch real-time is not larger than 1 m,40 epoch real-time moving average positioning accuracy is about 0.5 m,pseudo-range positioning accuracy is improved greatly.The method can meet demand of users for navigation and positioning.%基于BDS/GPS CORS试验系统,利用伪距信息,通过多基站差分定位技术,对BDS/GPS融合差分网定位进行研究.结果表明,多基准站BDS/GPS融合差分网单历元实时定位精度优于1 m,40历元实时滑动平均定位精度0.5m左右,大大提高了常规伪距定位精度,能满足大多数用户的导航定位需求(精度0.1 ~10m).

  11. Establishment of Quality Standards of Paeonia Lactiflora Pall%关于芍药质量标准的制定

    Institute of Scientific and Technical Information of China (English)

    胡世林; 廖福龙; 周红涛; 冯学峰; 李文

    2004-01-01

    目的:芍药Paeonia lactiflora Pall.的根既作中药赤芍,又作白芍用,但主治病症有很大区别,本研究在探索这种区别科学性的基础上和确定芍药苷含量的可行标准.方法:直接从主要产区取样,用RAPD技术分析DNA多态性特征,用显微计数淀粉粒和草酸钙结晶的数量,用HPLC法测定芍药苷含量.结果:DNA和红外光谱指纹图谱可以区别野生和栽培,观赏栽培和药用栽培的芍药.赤芍中芍药苷含量不得低于3.5%;白芍中芍药苷的含量改为幅度限制,应在0.8%~3.5%之间,以区别于赤芍,证明中医临床将同一物种芍药区分为赤、白使用是科学的.结论:野生变家种并非是解决赤芍资源走向枯竭的正确途径;为完整准确地表达赤、白芍的来源,建议白芍定义为药用栽培芍药Paeonia lactiflora Pall. CV.Baishao经去皮、水煮等方法加工干燥的根,药材的拉丁名建议为Radix Paeoniae Lactiflorae Alba,因为同属其它种即使栽培也不作白芍用;赤芍定义为野生芍药Paeonia lactiflora Pall.var.1actiflora的干燥根,采用新的药材拉丁名Radix Paeoniae Lactiflorae Fera,因为赤芍并非赤色,其本质是野生来源;观赏芍药不能作白芍和赤芍,拉丁名亦应标明观赏Paeonia lactiflora Pall. CV.Ornata.

  12. BDS/GPS/GLONASS组合相对定位性能分析

    Institute of Scientific and Technical Information of China (English)

    项程程; 郭慧军; 李英超

    2014-01-01

    分别对BDS、GPS、GLONASS的时间和坐标系统进行统一,建立模型。再根据经典双差模型,可得BDS/GPS/GLONASS双差载波相位观测方程,对观测方程求解采用卡尔曼滤波算法。本文从观测数据质量、定位精度、定位精度收敛性对组合相对定位性能进行测试分析,得出BDS/GPS/GLONASS组合相对定位的优势大于单系统定位的结论。

  13. BDS 导航终端用户主观体验量化评价方法%The Method of Quantitative Evaluation of BDS Navigation Terminal User’s Subjective Experience

    Institute of Scientific and Technical Information of China (English)

    许培; 董晶晶

    2016-01-01

    In order to resolve the difficulty of quantitative evaluation of the user’s subjective experience quality of BDS nav-igation terminal,this paper got the users’feedback in army for the using feeling of BDS navigation terminal,through the methods such as design and implementation of the user interviews and questionnaire survey,which were based on the experi-ence accumulated in the process of BDS navigation terminal application security.In a hierarchical analysis method as the basic method,the paper puts forward a user’s subjective experience of quantitative evaluation of the BDS navigation terminal user experience evaluation index system.The system index and evaluation criteria are made in detail in the paper,and it also designs a set of test methods matched with the system,So that to achieve the quantitative evaluation of the user’s subjective feeling of BDS navigation terminal.%本文针对 BDS 导航终端的用户主观体验质量难以量化评价的问题,基于长期在 BDS 导航终端应用保障过程中积累的经验,通过针对性的设计并实施用户访谈、问卷调查等方式,获得了部队用户对 BDS 导航终端使用感受的真实反馈。以层次分析法为主要基础方法,提出了一种能够将用户的主观使用感受进行量化评价的 BDS 导航终端用户体验评价指标体系。文中对该体系的指标项目与评判标准做出了详细说明,并设计了一套与之配套的测试方法,实现了 BDS 用户终端在用户主观感受方面的量化评价。

  14. Analysis and compensation for code Doppler effect of BDS II signal under high dynamics

    Science.gov (United States)

    Ouyang, Xiaofeng; Zeng, Fangling

    2016-01-01

    In high dynamic circumstances, the acquisition of BDS (BeiDou Navigation Satellite System) signal would be affected by the pseudo-code Doppler. The pseudo-code frequency shift is more prominent and complex when BOC modulation has been adopted by BDS-II, but is not yet involved in current compensation algorithm. In addition, the most frequently used code Doppler compensation algorithm is modifying the sampling rate or local bit rate, which not only increases the complexity of the acquisition and tracking, but also is barely realizable for the hardware receiver to modify the local frequency. Therefore, this paper proposes a code Doppler compensation method based on double estimator receiver, which simultaneously controls NCO delay of code tracking loop and subcarrier tracking loop to compensate for pseudo-code frequency shift. The simulation and test are implemented with BDS-II BOC signal. The test results demonstrate that the proposed algorithm can effectively compensate for pseudo-code Doppler of BOC signal and has detection probability 3dB higher than the uncompensated situation when the false alarm rate is under 0.01 and the coherent integration time is 1ms.

  15. Voltage-gated potassium currents within the dorsal vagal nucleus: inhibition by BDS toxin.

    Science.gov (United States)

    Dallas, Mark L; Morris, Neil P; Lewis, David I; Deuchars, Susan A; Deuchars, Jim

    2008-01-16

    Voltage-gated potassium (Kv) channels are essential components of neuronal excitability. The Kv3.4 channel protein is widely distributed throughout the central nervous system (CNS), where it can form heteromeric or homomeric Kv3 channels. Electrophysiological studies reported here highlight a functional role for this channel protein within neurons of the dorsal vagal nucleus (DVN). Current clamp experiments revealed that blood depressing substance (BDS) and intracellular dialysis of an anti-Kv3.4 antibody prolonged the action potential duration. In addition, a BDS sensitive, voltage-dependent, slowly inactivating outward current was observed in voltage clamp recordings from DVN neurons. Electrical stimulation of the solitary tract evoked EPSPs and IPSPs in DVN neurons and BDS increased the average amplitude and decreased the paired pulse ratio, consistent with a presynaptic site of action. This presynaptic modulation was action potential dependent as revealed by ongoing synaptic activity. Given the role of the Kv3 proteins in shaping neuronal excitability, these data highlight a role for homomeric Kv3.4 channels in spike timing and neurotransmitter release in low frequency firing neurons of the DVN.

  16. Viljandi maakonna hariduselu vajab läbimõeldud raputust / Hendrik Agur, Tiina Pall, Aavo Palo ; küsitlenud Liisi Seil

    Index Scriptorium Estoniae

    Agur, Hendrik, 1965-

    2007-01-01

    Viljandist pärit Tallinna Gustav Adolfi Gümnaasiumi direktor Hendrik Agur, Tallinna Kristiine Gümnaasiumi direktor Tiina Pall ja Viljandi Paalalinna Gümnaasiumi direktor Aavo Palo arutlevad Viljandimaa hariduselu tuleviku üle. Sisus ka : Seil, Liisi. Klubi liidab ühes majas kasvanud haridusjuhte

  17. Precision Analysis of Pseudorange Single Point Positioning by BDS, GPS and Combined BDS/GPS%BDS、GPS及其组合系统伪距单点定位精度分析

    Institute of Scientific and Technical Information of China (English)

    陈浩; 许长辉; 高井祥; 宋现锋; 袁林山

    2015-01-01

    为研究北斗卫星导航系统(BDS)和BDS/GPS组合系统的定位性能,根据实测数据对比分析了GPS、BDS及BDS/GPS组合系统的可见卫星数、空间位置精度因子(PDOP)和伪距定位结果,以及BDS地球静止轨道(GEO)和中圆轨道/倾斜轨道(MEO/IGSO)卫星的定位结果;针对BDS与GPS观测值之间的精度差异,分别采用等权模型、高度角模型和Helmert模型研究组合系统的最优随机模型.研究表明:组合系统卫星的空间几何分布优于单系统;BDS定位的平面精度低于GPS,高程精度高于GPS,而BDS/GPS组合系统平面和三维精度高于单个系统;Helmert验后估计模型能够提高BDS/GPS组合定位的高程和三维定位精度.

  18. Sea level change from BeiDou Navigation Satellite System-Reflectometry (BDS-R): First results and evaluation

    Science.gov (United States)

    Jin, Shuanggen; Qian, Xiaodong; Wu, X.

    2017-02-01

    Sea level changes affect human living environments, particularly ocean coasts. The tide gauges (TG) can measure sea level change, while it is the relative variations with respect to the land. Recently, GPS-Reflectometry (GPS-R) has been demonstrated to measure sea level change as an altimetry. With the rapid development of China's BeiDou Navigation Satellite System (BDS), it may provide a new possible opportunity to monitor sea level changes with three frequencies (L2, L6 and L7). In this paper, BDS-Reflectometry (BDS-R) is the first time used to estimate the sea level changes based on Signal-to-Noise Ratio (SNR) data and triple-frequency phase and code combinations, which are compared to tide gauge observations. Results show that sea level changes from BDS SNR and phase combination have a good agreement with correlation coefficients of 0.83-0.91 and RMSEs of less than 0.6 m, while BDS code combination is not as good as others. Furthermore, a new negative linear model between phase and code peak frequencies and tide gauge observations is further obtained and analyzed, which improves the results from three-frequency phase and code combinations with the RMSE of about 10 cm and 18 cm.

  19. [Preclinical study of immunocorrection action of the sum of active substances of Coluria geoides (Pall.) Ledeb. (Rosaceae)].

    Science.gov (United States)

    Dutova, S V; Karpova, M R; Myadelets, M A; Myasnaya, N V; Sherstoboev, E Yu

    2015-01-01

    A preclinical study of the immunocorrection action of the sum of active substances isolated from ethereal-oil plants Coluria geoides (Pall.) Ledeb. (Rosaceae family) with respect to experimental immunodeficiency showed that preparations relieve symptoms of immunodeficiency caused by the administration of cyclophosphan: suppressed synthesis of anti-erythrocyte antibodies (agglutinine) and proliferative processes in the spleen. Under the influence of C. geoides preparations, the absolute numbers of cariocytes and antibody forming cells in spleen significantly increased (compared to the group of animals with experimental immunodeficiency) and in some cases reached the background level. The drugs studied produced a more pronounced stimulating effect on the synthesis of specific immunoglobulins and proliferation of antibody forming cells of spleen as compared to the effect of Echinacea tincture. Preparation C-2 (extract from underground organs and grass of C. geoides obtained by percolation method with 70% ethanol) is most promising for in-depth research and the development of new effective drugs with immunocorrecting properties.

  20. New versions of the BDS/GNSS zenith tropospheric delay model IGGtrop

    Science.gov (United States)

    Li, Wei; Yuan, Yunbin; Ou, Jikun; Chai, Yanju; Li, Zishen; Liou, Yuei-An; Wang, Ningbo

    2015-01-01

    The initial IGGtrop model proposed for Chinese BDS (BeiDou System) is not very suitable for BDS/GNSS research and application due to its large data volume while it shows a global mean accuracy of 4 cm. New versions of the global zenith tropospheric delay (ZTD) model IGGtrop are developed through further investigation on the spatial and temporal characteristics of global ZTD. From global GNSS ZTD observations and weather reanalysis data, new ZTD characteristics are found and discussed in this study including: small and inconsistent seasonal variation in ZTD between and stable seasonal variation outside; weak zonal variation in ZTD at higher latitudes (north of and south of ) and at heights above 6 km, etc. Based on these analyses, new versions of IGGtrop, named , are established through employing corresponding strategies: using a simple algorithm for equatorial ZTD; generating an adaptive spatial grid with lower resolutions in regions where ZTD varies little; and creating a method for optimized storage of model parameters. Thus, the models require much less parameters than the IGGtrop model, nearly 3.1-21.2 % of that for the IGGtrop model. The three new versions are validated by five years of GNSS-derived ZTDs at 125 IGS sites, and it shows that: demonstrates the highest ZTD correction performance, similar to IGGtrop; requires the least model parameters; is moderate in both zenith delay prediction performance and number of model parameters. For the model, the biases at those IGS sites are between and 4.3 cm with a mean value of cm and RMS errors are between 2.1 and 8.5 cm with a mean value of 4.0 cm. Different BDS and other GNSS users can choose a suitable model according to their application and research requirements.

  1. 一种BDS/GPS组合动态变形测量系统的模糊度实时算法分析%Research on Instantaneous Ambiguity Resolution ofIntegrated BDS/GPS For Kinematic Deformation Surveying

    Institute of Scientific and Technical Information of China (English)

    周蓉; 向民志; 薛志宏

    2014-01-01

    介绍了BDS/GPS组合载波相位双差定位的解算模型,分析了通常模糊度实时算法的不足,根据工程结构变形测量中,监测点初始坐标已知且在一定范围内变化的特点,提出了一种BDS/GPS组合测量系统模糊度单历元实时算法.通过实测的实验数据,验证了本文算法的正确性.

  2. Modulation of Kv3 subfamily potassium currents by the sea anemone toxin BDS: significance for CNS and biophysical studies.

    Science.gov (United States)

    Yeung, Shuk Yin M; Thompson, Dawn; Wang, Zhuren; Fedida, David; Robertson, Brian

    2005-09-21

    Kv3 potassium channels, with their ultra-rapid gating and high activation threshold, are essential for high-frequency firing in many CNS neurons. Significantly, the Kv3.4 subunit has been implicated in the major CNS disorders Parkinson's and Alzheimer's diseases, and it is claimed that selectively targeting this subunit will have therapeutic utility. Previous work suggested that BDS toxins ("blood depressing substance," from the sea anemone Anemonia sulcata) were specific blockers for rapidly inactivating Kv3.4 channels, and consequently these toxins are increasingly used as diagnostic agents for Kv3.4 subunits in central neurons. However, precisely how selective are these toxins for this important CNS protein? We show that BDS is not selective for Kv3.4 but markedly inhibits current through Kv3.1 and Kv3.2 channels. Inhibition comes about not by "pore block" but by striking modification of Kv3 gating kinetics and voltage dependence. Activation and inactivation kinetics are slowed by BDS-I and BDS-II, and V(1/2) for activation is shifted to more positive voltages. Alanine substitution mutagenesis around the S3b and S4 segments of Kv3.2 reveals that BDS acts via voltage-sensing domains, and, consistent with this, ON gating currents from nonconducting Kv3.2 are markedly inhibited. The altered kinetics and gating properties, combined with lack of subunit selectivity with Kv3 subunits, seriously affects the usefulness of BDS toxins in CNS studies. Furthermore, our results do not easily fit with the voltage sensor "paddle" structure proposed recently for Kv channels. Our data will be informative for experiments designed to dissect out the roles of Kv3 subunits in CNS function and dysfunction.

  3. A Method Based on Broadcast Ephemeris to Detect BDS Satellite Orbital Maneuver%一种基于广播星历的 BDS 轨道机动探测方法

    Institute of Scientific and Technical Information of China (English)

    燕兴元; 黄观文; 张睿; 张勤

    2015-01-01

    For BeiDou navigation satellite system (BDS),the orbital maneuver frequencies of GEO satellites and IGSO sat-ellites were high,the precision of precise orbit determination and precise positioning using BDS satellite were affected directly, thus it was particularly important to detect orbital maneuver accurately before the orbit determination. For the problem of BDS satellite orbital maneuver,this article provided a new method,based on broadcast ephemeris,to detect BDS satellites orbital maneuver. The decision matrix was built to judge the satellite orbital maneuver. It was constructed by the RMS value of two groups of all reference epochs positions,which were calculated by any two different reference epochs respectively. What’s more,two groups of three-days broadcast ephemeris were used to detect BDS satellites orbital maneuver with 312 th ,313 th and 314th of 2014 together with 008th ,009 th and 010th day of 2015,Results show that the satellite orbital maneuver can be detected by the proposed method.%BDS 中 GEO 卫星和 IGSO 卫星的轨道机动现象频繁,其直接影响后续 BDS 定轨定位精度,因而在 BDS 定轨解算前进行准确的轨道机动探测显得尤为重要。针对 BDS 轨道机动问题,本文给出了一种基于广播星历的 BDS 轨道机动探测方法,该方法的基本思路为利用广播星历任意一个参考历元恢复的卫星轨道弧段与其余参考历元恢复的卫星轨道弧段在对应时刻互差的均方根值构建精度判别矩阵,利用判别矩阵元素值与设定阈值进行比较从而判断卫星是否存在机动。数值算例中利用此方法分别对2014年第312、313、314天和2015年第008、009、010天的 BDS 合成的三天广播星历进行轨道机动探测,探测结果表明本文方法可以较好地探测出卫星轨道机动时刻。

  4. Modeling and assessment of triple-frequency BDS precise point positioning

    Science.gov (United States)

    Guo, Fei; Zhang, Xiaohong; Wang, Jinling; Ren, Xiaodong

    2016-11-01

    The latest generation of GNSS satellites such as GPS BLOCK-IIF, Galileo and BDS are transmitting signals on three or more frequencies, thus having more choices in practice. At the same time, new challenges arise for integrating the new signals. This paper contributes to the modeling and assessment of triple-frequency PPP with BDS data. First, three triple-frequency PPP models are developed. The observation model and stochastic model are designed and extended to accommodate the third frequency. In particular, new biases such as differential code biases and inter-frequency biases as well as the parameterizations are addressed. Then, the relationships between different PPP models are discussed. To verify the triple-frequency PPP models, PPP tests with real triple-frequency data were performed in both static and kinematic scenarios. Results show that the three triple-frequency PPP models agree well with each other. Additional frequency has a marginal effect on the positioning accuracy in static PPP tests. However, the benefits of third frequency are significant in situations of where there is poor tracking and contaminated observations on frequencies B1 and B2 in kinematic PPP tests.

  5. A Unified Model for BDS Wide Area and Local Area Augmentation Positioning Based on Raw Observations

    Directory of Open Access Journals (Sweden)

    Rui Tu

    2017-03-01

    Full Text Available In this study, a unified model for BeiDou Navigation Satellite System (BDS wide area and local area augmentation positioning based on raw observations has been proposed. Applying this model, both the Real-Time Kinematic (RTK and Precise Point Positioning (PPP service can be realized by performing different corrections at the user end. This algorithm was assessed and validated with the BDS data collected at four regional stations from Day of Year (DOY 080 to 083 of 2016. When the users are located within the local reference network, the fast and high precision RTK service can be achieved using the regional observation corrections, revealing a convergence time of about several seconds and a precision of about 2–3 cm. For the users out of the regional reference network, the global broadcast State-Space Represented (SSR corrections can be utilized to realize the global PPP service which shows a convergence time of about 25 min for achieving an accuracy of 10 cm. With this unified model, it can not only integrate the Network RTK (NRTK and PPP into a seamless positioning service, but also recover the ionosphere Vertical Total Electronic Content (VTEC and Differential Code Bias (DCB values that are useful for the ionosphere monitoring and modeling.

  6. Beam dynamic simulations of the CLIC crab cavity and implications on the BDS

    Energy Technology Data Exchange (ETDEWEB)

    Shinton, I.R.R., E-mail: ian.shinton@stfc.ac.uk [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); Cockcroft Institute of Accelerator Science and Technology, Daresbury (United Kingdom); Burt, G. [Engineering Department, Lancaster University, Lancaster (United Kingdom); Cockcroft Institute of Accelerator Science and Technology, Daresbury (United Kingdom); Glasman, C.J.; Jones, R.M. [School of Physics and Astronomy, University of Manchester, Manchester (United Kingdom); Cockcroft Institute of Accelerator Science and Technology, Daresbury (United Kingdom); Wolski, A. [Department of Physics, University of Liverpool, Liverpool (United Kingdom); Cockcroft Institute of Accelerator Science and Technology, Daresbury (United Kingdom)

    2011-11-21

    The Compact Linear Collider (CLIC) is a proposed electron positron linear collider design aiming to achieve a centre of mass energy of up to 3 TeV. The main accelerating structures in CLIC operate at an X-band frequency of 11.994 GHz with an accelerating gradient of 100 MV/m. The present design requires the beams to collide at a small crossing angle of 10 mrad per line giving a resultant overall crossing angle of 20 mrad. Transverse deflecting cavities, referred to as 'Crab cavities', are installed in the beam delivery system (BDS) of linear collider designs in order to ensure the final luminosity at the interaction point (IP) is comparable to that in a head on collision. We utilise the beam tracking code PLACET combined with the beam-beam code GUINEA-PIG to calculate the resulting luminosity at the IP. We follow a similar tuning procedure to that used for the design of the ILC crab cavities and anitcrab cavities. However an unexpected loss in luminosity of 10% was observed for the 20 mrad design was observed. It was discovered that the action of the crab cavities can affect the geometric aberrations resulting from the sextupoles used to correct chromatic effects in the beam delivery system. This has direct consequences regarding the design of the present CLIC BDS.

  7. Comparison and Analysis of Single-Epoch Attitude Measurement Performance with Combined BDS/GPS/GLONASS%BDS/GP S/GLONASS组合单历元姿态测量性能对比分析

    Institute of Scientific and Technical Information of China (English)

    张康; 郝金明; 刘伟平; 谢建涛; 陈逸伦

    2016-01-01

    Compared with a single satellite navigation system, the combination of multi-GNSS can significantly in-creases the number of available satellites, and improves the satellite geometry, so the application of combination of multi-GNSS becomes the focus of attention in recent years. The carrier attitude determination with combined BDS/GPS/GLONASS has the unmatchable advantage over a single system in complex observing conditions. This paper describes the double difference model used by ultra-short baseline solution with combined BDS/GPS/GLONASS and the basic principles of attitude determination, then the single-epoch attitude determination performance of multi-frequency combined BDS/GPS/GLONASS is analyzed. By setting different satellite elevation mask angle in static data analysis, it shows that: Compared with a single system or a combination of the two systems, the attitude determination with combined BDS/GPS/GLONASS can effectively improves the accuracy, stability, and availabili-ty. The attitude determination with combined BDS/GPS/GLONASS shows more value when carriers are moving in tall buildings, canyons and other shadowed serious complex environments.%相比于单一卫星导航系统,多卫星导航系统组合具有显著增加可用卫星数目、改善卫星空间几何结构等优点,因而多卫星导航系统组合应用成为近年来关注的热点。在复杂观测条件下,利用BDS/GPS/GLONASS组合进行载体姿态测量具有单系统无法比拟的优势。首先阐述了BDS/GPS/GLONASS组合超短基线解算的双差模型以及姿态测量基本原理;然后分析了BDS/GPS/GLONASS组合多频单历元姿态测量性能。通过实测静态数据设置不同高度截止角进行分析表明:相比于单系统及双系统组合的姿态测量, BDS/GPS/GLONASS组合能够有效地提高姿态测量的精度、稳定性和可用性。当运动载体处于高楼、峡谷等受遮挡严重的复杂环境时,BDS/GPS/GLONASS组合单历元姿态测量更具有应用价值。

  8. 高动态 BDS/GPS 联合接收机基带芯片设计与实现%Design and Implementation of Baseband ASIC for High Dynamic BDS/GPS Combined Receiver

    Institute of Scientific and Technical Information of China (English)

    侯冰; 张晓林; 郭九源; 赵雷

    2016-01-01

    A novel architecture of baseband ASIC for high dynamic BDS /GPS combined receiver is proposed.The design of general C /A code generator,carrier NCO,code NCO and architecture of acquisition and tracking channel,which is compatible with dual systems of BDS and GPS,is discussed in detail.The proposed architecture can decrease the acquisition time and improve the receiver’s dynamic range at low hardware cost.Based on the software simulation and FPGA prototype,a baseband ASIC is devel-oped.The above -mentioned design is fully verified by actual test results.%提出一种适用于高动态 BDS /GPS 联合接收机的基带芯片结构设计,主要包括兼容 BDS /GPS 的通用 C /A 码发生器模块、载波 NCO 模块、码 NCO 模块和捕获跟踪通道支路结构的设计。该设计可以节约硬件资源,提高卫星信号捕获速度和接收机动态范围。在软件仿真和 FPGA 原型验证的基础上,设计实现了一款 BDS /GPS 联合接收机基带芯片,实际样片测试结果验证了设计的有效性。

  9. 刺玫果多糖含量测定方法优选%Study on the Determination Method for Polysaccharide Content in Rosa davurica Pall.

    Institute of Scientific and Technical Information of China (English)

    陈帅; 孙毓婷; 李锐; 钟方丽

    2012-01-01

    To optimize determination method of polysaccharide content in Rosa davurica Pall. [Method] Through precision experiment , stability experiment, recovery rate experiment and linear relationship to compare the application of phenol sulfuric acid colorimetry method and anthranone sulfuric acid colorimetry method in determining polysaccharide content in Rosa davurica Pall. [ Results ] Phenol sulfuric acid colorimetry method was superior than anthranone sulfuric acid colorimetry method in determination of polysaccharide content in Rosa davurica Pall. [Conclusion] The above determination method is stable and reliable.%[目的]优选刺玫果多糖的含量测定方法.[方法]通过精密度试验、稳定性试验、回收率试验和线性关系考察比较苯酚硫酸法和蒽酮硫酸法2种常用多糖含量测定方法在测定刺玫果多糖中的应用.[结果]苯酚硫酸法测定刺玫果多糖含量优于蒽酮硫酸法.[结论]该研究确定的多糖含量测定方法稳定、可靠,可用于刺玫果多糖的含量测定.

  10. Pall摩擦耗能减震器减震性能研究%The shock absorption properties of Pall frictional energy dissipation shock absorber

    Institute of Scientific and Technical Information of China (English)

    孙志松

    2009-01-01

    Against to the fast developing status of structural shock absorption technology, the applied situation of Pall frictional energy dissipa-tion shock absorber was introduced. The basic constitution and shack absorption properties of Pall frictional energy dissipation shock absorber were analyzed, the result indicated that it can dissipate large amount seismic energy and had better shock absorption effect with energy dissipa-tion supporting of Pall frictional shock absorption device as protective structure.%针对结构减震技术迅速发展的现状,介绍了Pall摩擦耗能减震器的应用情况,就Pall摩擦耗能减震器的基本构造及减震性能进行了分析,结果表明:采用安装Pall摩擦减震装置的耗能支撑来保护结构,可耗散大量地震能量,减震效果好.

  11. A Kalman filter-based short baseline RTK algorithm for single-frequency combination of GPS and BDS.

    Science.gov (United States)

    Zhao, Sihao; Cui, Xiaowei; Guan, Feng; Lu, Mingquan

    2014-08-20

    The emerging Global Navigation Satellite Systems (GNSS) including the BeiDou Navigation Satellite System (BDS) offer more visible satellites for positioning users. To employ those new satellites in a real-time kinematic (RTK) algorithm to enhance positioning precision and availability, a data processing model for the dual constellation of GPS and BDS is proposed and analyzed. A Kalman filter-based algorithm is developed to estimate the float ambiguities for short baseline scenarios. The entire work process of the high-precision algorithm based on the proposed model is deeply investigated in detail. The model is validated with real GPS and BDS data recorded from one zero and two short baseline experiments. Results show that the proposed algorithm can generate fixed baseline output with the same precision level as that of either a single GPS or BDS RTK algorithm. The significantly improved fixed rate and time to first fix of the proposed method demonstrates a better availability and effectiveness on processing multi-GNSSs.

  12. A Kalman Filter-Based Short Baseline RTK Algorithm for Single-Frequency Combination of GPS and BDS

    Directory of Open Access Journals (Sweden)

    Sihao Zhao

    2014-08-01

    Full Text Available The emerging Global Navigation Satellite Systems (GNSS including the BeiDou Navigation Satellite System (BDS offer more visible satellites for positioning users. To employ those new satellites in a real-time kinematic (RTK algorithm to enhance positioning precision and availability, a data processing model for the dual constellation of GPS and BDS is proposed and analyzed. A Kalman filter-based algorithm is developed to estimate the float ambiguities for short baseline scenarios. The entire work process of the high-precision algorithm based on the proposed model is deeply investigated in detail. The model is validated with real GPS and BDS data recorded from one zero and two short baseline experiments. Results show that the proposed algorithm can generate fixed baseline output with the same precision level as that of either a single GPS or BDS RTK algorithm. The significantly improved fixed rate and time to first fix of the proposed method demonstrates a better availability and effectiveness on processing multi-GNSSs.

  13. Real-Time seismic waveforms monitoring with BeiDou Navigation Satellite System (BDS) observations for the 2015 Mw 7.8 Nepal earthquake

    Science.gov (United States)

    Geng, T.

    2015-12-01

    Nowadays more and more high-rate Global Navigation Satellite Systems (GNSS) data become available in real time, which provide more opportunities to monitor the seismic waveforms. China's GNSS, BeiDou Navigation Satellite System (BDS), has already satisfied the requirement of stand-alone precise positioning in Asia-Pacific region with 14 in-orbit satellites, which promisingly suggests that BDS could be applied to the high-precision earthquake monitoring as GPS. In the present paper, real-time monitoring of seismic waveforms using BDS measurements is assessed. We investigate a so-called "variometric" approach to measure real-time seismic waveforms with high-rate BDS observations. This approach is based on time difference technique and standard broadcast products which are routinely available in real time. The 1HZ BDS data recorded by Beidou Experimental Tracking Stations (BETS) during the 2015 Mw 7.8 Nepal earthquake is analyzed. The results indicate that the accuracies of velocity estimation from BDS are 2-3 mm/s in horizontal components and 8-9 mm/s in vertical component, respectively, which are consistent with GPS. The seismic velocity waveforms during earthquake show good agreement between BDS and GPS. Moreover, the displacement waveforms is reconstructed by an integration of velocity time series with trend removal. The displacement waveforms with the accuracy of 1-2 cm are derived by comparing with post-processing GPS precise point positioning (PPP).

  14. 基于BDS/GPS双系统的全球电离层建模

    Institute of Scientific and Technical Information of China (English)

    薛军琛; 宋淑丽; 朱文耀

    2015-01-01

    借助当前比较完善的GPS系统,建立基于BDS/GPS双系统的全球电离层模型,是克服BDS单系统建模弊端,提高全球电离层模型和硬件延迟(DCB)监测精度的一种有效途径.本文分析了基于BDS/GPS双系统的电离层模型所能达到的精度,以及GPS观测对DCB监测的辅助作用.文中选用了太阳活动峰年2013年2月11日–2014年1月13日336天的BDS/GPS双系统观测资料,利用15×15阶球谐函数模型建立了全球电离层模型(GIM/SHA),并利用IGS最终电离层产品(GIM/IGS)、双频实测VTEC和海洋测高数据对该双系统模型的电离层产品进行了全面的精度评估.结果表明:(1)通过与三种基准数据比对,GIM/SHA的外符合精度在3–6 tecu范围内,且系统性偏差较小;(2)GPS卫星P1P2频点DCB与IGS最终产品结果比较BIAS在0.1 ns内,RMS最大不超过0.2 ns;(3)通过比较BDS单系统与双系统生成的卫星和接收机B1B2频点DCB发现,两种方法解算的DCB均值差别为0.01–0.227 ns,双系统解算BDS卫星DCB稳定性稍优于单系统结果,但是GPS观测资料的加入能够明显地提高接收机DCB的稳定性;从14颗BDS在轨卫星B1B2频点DCB长期稳定性统计可见,各卫星DCB长期稳定性为0.2–0.3ns,其中GEO卫星稳定性水平稍差.

  15. BDS Precise Point Positioning for Seismic Displacements Monitoring: Benefit from the High-Rate Satellite Clock Corrections.

    Science.gov (United States)

    Geng, Tao; Su, Xing; Fang, Rongxin; Xie, Xin; Zhao, Qile; Liu, Jingnan

    2016-12-20

    In order to satisfy the requirement of high-rate high-precision applications, 1 Hz BeiDou Navigation Satellite System (BDS) satellite clock corrections are generated based on precise orbit products, and the quality of the generated clock products is assessed by comparing with those from the other analysis centers. The comparisons show that the root mean square (RMS) of clock errors of geostationary Earth orbits (GEO) is about 0.63 ns, whereas those of inclined geosynchronous orbits (IGSO) and medium Earth orbits (MEO) are about 0.2-0.3 ns and 0.1 ns, respectively. Then, the 1 Hz clock products are used for BDS precise point positioning (PPP) to retrieve seismic displacements of the 2015 Mw 7.8 Gorkha, Nepal, earthquake. The derived seismic displacements from BDS PPP are consistent with those from the Global Positioning System (GPS) PPP, with RMS of 0.29, 0.38, and 1.08 cm in east, north, and vertical components, respectively. In addition, the BDS PPP solutions with different clock intervals of 1 s, 5 s, 30 s, and 300 s are processed and compared with each other. The results demonstrate that PPP with 300 s clock intervals is the worst and that with 1 s clock interval is the best. For the scenario of 5 s clock intervals, the precision of PPP solutions is almost the same to 1 s results. Considering the time consumption of clock estimates, we suggest that 5 s clock interval is competent for high-rate BDS solutions.

  16. BD S三频观测值线性组合分析%Analysing The Linear Combination of the BDS Triple Frequency Observation

    Institute of Scientific and Technical Information of China (English)

    凌云; 侍荣; 丁锁妹

    2015-01-01

    Briefly introduces the theoretical basis of the linear combination of the observation in GNSS data processing .Based on the BDS triple frequency observation ,it makes a deep analysis in the characteristics of the different linear combinations of the BDS observations .And it provide the reference for BDS data processing .%简单介绍了GNSS数据处理中观测值线性组合的理论基础。基于BDS三频观测值,深入分析不同BDS观测值线性组合所具备的特点,为BDS数据处理提供参考。

  17. 白芍的中药代谢特征谱研究%Studies on metabolism of Chinese materia medica of radix from Paeonia lactiflora Pall

    Institute of Scientific and Technical Information of China (English)

    潘艳丽; 董玲; 刘洋; 石任兵; 徐暾海; 翟华强; 赵保胜; 方敏; 汪国鹏

    2011-01-01

    Objective To research the metabolism of components in the Radix of Paeonia lactiflora Pall. Methods (①) we established the HPLC fingerprint of water extract of Paeonia lactiflora Pall. and real-time monitored the chemical composition. (②) We established the HPLC fingerprint of rats' serum samples from hepatic portal vein, serum samples from aorta abdominalis and samples of intestinal absorption of Paeonia lactiflora Pall. (③) On this basis, using the established methods, I-IPLC fingerprint spectrum of serum samples,the sample of herb, the sample after intestinal metabolism, rats' serum samples from hepatic portal vein and rats'serum samples from aorta abdominalis were analyzed and compared in order to infer the metabolism of components in the Radix of Paeonia lactiflora Pall. Results 24 compositions were detected, seven of which were metabolized by intestinal flora and could not be absorbed into blood; six of them could not be absorbed directedly into intestinal; eight new compounds were absorbed into blood after bowel metabolism while they were not detected in water extract in Paeonia lactiflora Pall. Conclusion We could infer the metabolic processes of chemicals of Paeonia lactiflora Pall. in oral administration with this method.%目的 探讨芍药Paeonia lactiflora Pall.的干燥根中紫外可检出成分在大鼠体内的代谢过程。方法 ①运用HPLC-DAD技术,建立白芍水提物化学成分特征谱,进行其中总体化学成分的并行即时监测;②采用门静脉采血、腹主动脉采血、离体外翻肠囊法,建立白芍水提物入血成分、血中成分及肠吸收成分特征谱;③在相同色谱条件下,分析比较大鼠门静脉入血成分、腹主动脉血中成分及肠吸收成分的化学成分特征谱,推断白芍水提取物中化学成分的代谢过程。结果在分析的24种成分中,白芍中的6种成分不能被肠直接吸收:8种成分可被肠道直接吸收入血;7种成分被肠道

  18. BDS ambiguity resolution with the modified TCAR method for medium-long baseline

    Science.gov (United States)

    Tian, Yijun; Zhao, Dongqing; Chai, Hongzhou; Wang, Sai

    2017-01-01

    As the BeiDou Navigation Satellite System (BDS) attained initial regional operational status at the end of October 2012, real BDS data are available to investigate triple-frequency ambiguity resolution (AR) performance. In this contribution, analysis of the classical TCAR models and limiting factors is given. It is concluded that the residual double-differencing (DD) ionospheric delay is the key limitation to the medium and long range narrow-lane (NL) ambiguity resolution in step 3 of the classical TCAR method. To improve this algorithm, the third step of the classical TCAR method is modified accordingly. The modified TCAR comprises three major steps. Step 1 and step 2 are the same as the classical TCAR, which is the geometry-free determination of the extra-wide-lane (EWL) and wide-lane (WL) ambiguities. Then we can derive the DD first-order ionospheric delay estimated from the ambiguity-fixed EWL. As the noise term of the estimated DD ionospheric delay is very large, the smooth method is employed to correct the estimated DD ionospheric delay. In step 3, the smooth DD ionospheric delay is used to completely correct the single-epoch DD float NL ambiguity resolution. It is also noted that there exist cycle-slips which influence the process of the ionosphere-smooth method. This is followed by a procedure to repair the cycle-slip. As a result, the modified-TCAR method shows a much better performance than the classical TCAR method over medium and long baseline.

  19. Ex situ conservation of genetic resources of field elm (Ulmus minor Mill and European white elm (Ulmus laevis Pall

    Directory of Open Access Journals (Sweden)

    Aleksić Jelena

    2004-01-01

    Full Text Available Principles of the conservation of genetic resources of elms (Ulmus spp do not differ fundamentally from the general principles accepted for the conservation of genetic resources of other common Noble Hardwoods. Efficient conservation can best be achieved through appropriate combination of in situ and ex situ methods, which have distinct advantages. Besides that, ex situ conservation is employed when emergency measures are needed for rare endangered populations and when populations are too small to be managed in situ (e.g. risks of genetic drift and inbreeding. The aim of our research is ex situ conservation of genetic resources of field elm {Ulmus minor Mill and European white elm (Ulmus laevis Pall through establishment of field genebanks. Sampling was conducted in one population of field elm and one population of white elm. Plant material (buds from 8 trees of field elm and 10 trees of white elm was used for in vitro production of clones. Obtained clones will be used for establishment of field genebanks on the experimental estate of the Institute of Lowland Forestry and Environment.

  20. Microbial growth on pall rings: a problem when upgrading biogas with the water-wash absorption technique.

    Science.gov (United States)

    Tynell, Asa; Börjesson, Gunnar; Persson, Margareta

    2007-01-01

    Biogas is upgraded using an absorption with water-wash technique by 11 of a total of 14 upgrading plants in Sweden. However, problems with microbial growth on the pall rings in the absorption column, and in one case in the desorption column, have a negative impact on the upgrading of raw gas to vehicle gas. Five of the nine biogas plants studied here have experienced problems with microbial growth. The objectives of this study were to identify such microbial growth and to determine possible factors for its control, in order to provide recommendations for process management. A questionnaire was sent out and visits were made to the upgrading plants to collect information about the upgrading process. Phospholipid fatty acid (PLFA) analysis was performed to determine microbial biomass and community structure in samples from four upgrading plants. In samples from two of the plants, methane-oxidizing bacteria (type I methanotrophs) were indicated, while samples from one of the other plants showed biomarkers indicating actinomycetes. Factors affecting development of microbial growth were found to be water quality and the pH and temperature of the process water. Plants that used wastewater in the upgrading process experienced far more problems than those using clean water of drinking quality.

  1. 白芍化学成分及质量评价方法研究进展%Research Progress on Chemical Composition and Quality Control of Paeonia Lactiflora Pall

    Institute of Scientific and Technical Information of China (English)

    吴芳; 杜伟锋; 徐姗姗; 葛卫红; 来平凡

    2012-01-01

    The present single -index evaluation method of Paeonia actiflora Pall is too unilateral to reflect the inner quality of Paeonia lactiflora Pall comprehensively.This paper has reviewed the studies on chemical composition and quality control method and analytical technology of Paeonia lactiflora Pall in recent years in summary analysis.We focus on the multi-index evaluation method to control the quality of Paeonia lactiflora Pall,and put forward some new ideas to further improve the quality control of Paeonia lactiflora Pall.%现有的白芍的单指标评价方法,过于片面,不能全面的反映白芍的内在品质.作者通过对近几年来国内外文献的查阅,总结了白芍的化学成分、质量控制方法和分析技术,提出了采用多指标质量控制方法来控制白芍质量,为进一步完善白芍质量控制提供思路.

  2. POE增韧改性尼龙11复合材料流变性能的研究%Study on Rheological Property of PAll Composites Toughened by POE

    Institute of Scientific and Technical Information of China (English)

    郭云霞; 胡国胜; 牛慧军

    2011-01-01

    The rheological properties of PAll and its composites with POE were studied by using capillary rheometer. The results showed that PAll and its blend system are pseudoplastic fluids. The non-Newtonian indexes of the blend systems decrease remarkably when POE and POE-g-MAH are added in PAll. With the increase of POE-g-MAH content, the viscosities of the systems gradually rise.The viscous activation energy of PAll and POE blends decline as the increase of shearing stress, which indicate that the PAll and POE blend can be processed over a wide temperature at a high shearing stress.%采用毛细管流变仪研究了尼龙11(PA11)与POE复合材料的流变性能,结果表明:PA11及其与POE共混体系均属于假塑性流体,引入POE和POE-g-MAH增加了共混体系的非牛顿性,且随POE-g-MAH含量的增大,共混体系的表观粘度逐渐增大.PA11与POE共混体系的粘流活化能随着剪切应力的增大而降低,说明其在高剪切应力下可在较宽的温度范围内加工成型.

  3. Software Development of Combined BDS/GPS Baseline Calculating and Precision Analysis%BDS/GPS组合基线解算软件开发及精度分析

    Institute of Scientific and Technical Information of China (English)

    杨旭; 范大凤; 陈小轶; 汪洋

    2015-01-01

    主要论述了BDS/GPS组合的理论,基于VC++6.0开发了BDS/GPS组合基线解算软件,详细介绍了该软件的设计思路及主要功能.利用多组实例数据比较了单系统与双系统在伪距单点,伪距双差和载波双差方面的精度差异,全面分析了解算结果,从而验证了该软件的正确性,并得出了有益结论.

  4. Positioning Accuracy Analysis of GPS/BDS/GLONASS Network RTK Based on DREAMNET%基于DREAMNET的GPS/BDS/GLONASS多系统网络RTK定位性能分析

    Institute of Scientific and Technical Information of China (English)

    姚宜斌; 胡明贤; 许超钤

    2016-01-01

    随着BDS系统完成亚太地区组网、GLONASS系统再次实现满星座部署以及GPS系统的现代化,多系统集成已逐步成为网络RTK技术的发展趋势.本文结合笔者所在课题组自主研发的网络RTK数据处理系统DREAMNET,对不同卫星系统组合模式下的定位精度进行比较分析.试验结果表明,GPS/BDS/GLONASS网络RTK和GPS/BDS网络RTK的定位精度最高,GPS、BDS单系统网络RTK次之.此外,随着高度角的增加,GPS单系统网络RTK的可用性显著降低,而GPS/BDS/GLONASS网络RTK在高度角为40°时依然可以在99.84%的时间里提供水平精度0.01 m、高程精度0.025 m的定位服务.最后,对15 d的定位结果进行统计,包括不依赖GPS系统的BDS和BDS/GLONASS在内的6种组合方式皆可达到水平0.01 m、高程0.025 m的定位精度,其中GPS/BDS/GLONASS网络RTK则可以得到水平0.006 m、高程0.015 m的定位精度,证明DREAMNET的定位精度和稳定性完全可以满足测绘作业的需要.

  5. BDS/GPS单历元多频定向算法性能对比%Study on algorithm of BDS/GPS multi-frequency instantaneous heading determination and its performance analysis

    Institute of Scientific and Technical Information of China (English)

    单弘煜; 何俊; 刘心龙; 刘万科

    2016-01-01

    针对多频多系统定向的不同需求,该文采用了BDS/GPS单历元双差非组合定向算法以及附有基线长约束的最小二乘降相关平差模糊度固定方法.4组实测数据的处理结果表明,单频GPS、单频BDS的模糊度平均固定成功率分别为55.9%、84.3%;单频双系统、多频(双频三频)单系统及多频(双频或三频)双系统定向时,其模糊度固定成功率均可达98%以上;在模糊度固定正确的情况下,BDS/GPS组合定向的精度最高,且与单GPS较为相近,但两者都略高于单BDS,频率差异所带来的精度差异并不明显.

  6. Metabolomics coupled with multivariate data and pathway analysis on potential biomarkers in cholestasis and intervention effect of Paeonia lactiflora Pall.

    Directory of Open Access Journals (Sweden)

    Xiao eMa

    2016-02-01

    Full Text Available Background: The dried root of Paeonia lactiflora Pall. (PLP is a classical Chinese herbal medicine that has been used to treat hepatic disease for thousands of years. Our previous work suggested that PLP can be used to treat hepatitis with severe cholestasis. This study explored the mechanism by which PLP affects ANIT-induced cholestasis in rats using a metabolomics approach.Methods: The effects of PLP on serum indices (TBIL, DBIL, AST, ALT, ALP and TBA and the histopathology of the liver were analyzed. Moreover, UHPLC-Q-TOF was performed to identify the possible effect of PLP on metabolites. The pathway analysis was conducted to illustrate the pathways and network by which PLP treats cholestasis. Result: High-dose PLP remarkably down-regulated the serum indices and alleviated histological damage to the liver. Metabolomics analyses showed that the therapeutic effect of high-dose PLP is mainly associated with the regulation of several metabolites, such as glycocholic acid, taurocholic acid, glycochenodeoxycholic acid, L(D-arginine and L-tryptophan. A pathway analysis showed that the metabolites were related to bile acid secretion and amino acid metabolism. In addition, the significant changes in bile acid transporters also indicated that bile acid metabolism might be involved in the therapeutic effect of PLP on cholestasis. Moreover, a principal component analysis indicated that the metabolites in the high-dose PLP group were closer to those of the control, whereas those of the moderate dose or low-dose PLP group were closer to those of the ANIT group. This finding indicated that metabolites may be responsible for the differences between the effects of low-dose and moderate-dose PLP. Conclusions: The therapeutic effect of high-dose PLP on cholestasis is possibly related to regulation of bile acid secretion and amino acid metabolism. Moreover, these findings may help better understand the mechanisms of disease and provide a potential therapy for

  7. Correlations Between Foliar Stable Carbon Isotope Composition and Environ-mental Factors in Desert Plant Reaumuria soongorica (Pall.) Maxim.

    Institute of Scientific and Technical Information of China (English)

    Jian-Ying MA; Tuo CHEN; Wei-Ya QIANG; Gang WANG

    2005-01-01

    Leaves of 407 individuals of Reaumuria soongorica (Pall.) Maxim. collected from the major distribution areas were measured to investigate the distribution characteristics of the stable carbon isotope in this desert plant, as well as correlations between δ13C values and environmental factors. Results showed that δ13C values in R. soongorica ranged from-22.77‰. to-29.85‰. and that the mean δ13C value (-26.52‰)was higher than a previously reported δ13C value for a different desert ecosystem. This indicates that R.soongorica belongs to the C3 photosynthetic pathway and has higher water use efficiency than other species. The correlations between δ13C values and environmental factors demonstrated that the foliar δ13C values in R. soongorica increased significantly with decreasing mean annual precipitation and mean relative humidity, and decreased with decreasing duration of sunshine and evaporation. The spatial distribution trend of δ13C values in R. soongorica was not obvious and there was no significant correlation between the δ13C values and mean annual temperature. We conclude that different distribution trends in δ13C values for R. soongorica were likely caused by stomatal limitation rather than by nutrient-related changes in photosynthetic efficiency and that precipitation played an important role in the wide distribution range of R.soongorica. This pattern of δ13C values for R. soongorica reinforced that it is a super-xerophil in terms of its adaptive strategies to a desert environment.

  8. Identification of miRNAs Responsive to Botrytis cinerea in Herbaceous Peony (Paeonia lactiflora Pall. by High-Throughput Sequencing

    Directory of Open Access Journals (Sweden)

    Daqiu Zhao

    2015-09-01

    Full Text Available Herbaceous peony (Paeonia lactiflora Pall., one of the world’s most important ornamental plants, is highly susceptible to Botrytis cinerea, and improving resistance to this pathogenic fungus is a problem yet to be solved. MicroRNAs (miRNAs play an essential role in resistance to B. cinerea, but until now, no studies have been reported concerning miRNAs induction in P. lactiflora. Here, we constructed and sequenced two small RNA (sRNA libraries from two B. cinerea-infected P. lactiflora cultivars (“Zifengyu” and “Dafugui” with significantly different levels of resistance to B. cinerea, using the Illumina HiSeq 2000 platform. From the raw reads generated, 4,592,881 and 5,809,796 sRNAs were obtained, and 280 and 306 miRNAs were identified from “Zifengyu” and “Dafugui”, respectively. A total of 237 conserved and 7 novel sequences of miRNAs were differentially expressed between the two cultivars, and we predicted and annotated their potential target genes. Subsequently, 7 differentially expressed candidate miRNAs were screened according to their target genes annotated in KEGG pathways, and the expression patterns of miRNAs and corresponding target genes were elucidated. We found that miR5254, miR165a-3p, miR3897-3p and miR6450a might be involved in the P. lactiflora response to B. cinerea infection. These results provide insight into the molecular mechanisms responsible for resistance to B. cinerea in P. lactiflora.

  9. SINS/GPS/BDS紧耦合系统研究%Research on SINS/GPS/BDS Tightly Coupled System

    Institute of Scientific and Technical Information of China (English)

    薛冬; 黄国荣; 彭兴钊; 许刚

    2012-01-01

    With the process of Bei Dou network' s formation, the application prospect of SINS/GPS/BDS integrated navigation system is splendid. In view of SINS/GPS/BDS tightly couple system, firstly the coupled system' s kalman filter algorithm was researched, base on this foundation, through comparing with loosely coupled system and SINS system alone, the performance of SINS/GPS/BDS tightly coupled system was simulated, finally the coupled system' s failure detection performance was simulated by use of Chi2 - square residuary detection method. The results show that SINS/GPS/BDS tightly coupled system has a surperior performance, and the tightly coupled system can widen the application of integrated system and make for failure detection, and make for failure detection.%随着北斗卫星组网的推进,SINS/GPS/BDS组合导航系统应用前景广阔.针对SINS/GPS/BDS紧耦合系统,首先研究了紧耦合系统的卡尔曼滤波算法,在此基础上与松耦合系统、纯惯导进行比较,对SINS/GPS/BDS紧耦合系统性能进行仿真研究,最后利用残差检验法对紧耦合系统的故障检测性能进行了仿真;结果表明,紧耦合系统具有优越的性能,采用紧耦合系统能扩大组合导航系统的应用范围,便于故障检测.

  10. 不同贮藏年限白芍的化学成分分析%Chemical composition analysis of Paeonia lactiflora Pall.of different storage time

    Institute of Scientific and Technical Information of China (English)

    魏香兰; 万颖; 方如塘; 魏堂昇; 冀爱云

    2012-01-01

    目的 比较不同贮藏年限白芍的化合物含量变化.方法 采用HPLC法,测定不同贮藏年限的白芍中芍药苷、芍药苷亚硫酸酯、芍药内酯苷和没食子酸的含量.结果 芍药苷、芍药苷亚硫酸酯的含量变化与贮藏时间长短无明显相关性,芍药内酯苷含量随贮藏时间的延长存在降低的趋势,没食子酸含量变化不明显.结论 白芍可贮藏的年限较长,但采用硫磺熏蒸会大大降低芍药苷的含量.%Objective To comparc the chemical composition change in Paeonia lacliflora Pall, of different storage time. Methods Paeonia lacliflora Pall, of different storage time were determined by HPLC method with paconiflorin, paeonifiorin sulfite ester, albifiorin and gallic acid as the standards. Results The contents change of paconif1orin,paconif1orin suifite ester did not have obvious correlation'with the storage time, the content of albiflorin gradually decreased with storage period,and the content of gallic acid did not have significant change. Conclusions Paeonia lacliflora Pall, stores time is long,but sulphur fumigation will greatly reduce the content of paconiflorin.

  11. 单频BDS/GPS测姿算法研究与结果对比分析

    Institute of Scientific and Technical Information of China (English)

    刘心龙; 卢立果; 刘万科

    2015-01-01

    从数学模型、参数估计和模糊度快速固定等方面对BDS/GPS测姿算法进行了研究。采用最小二乘滤波和附有基线长约束的模糊度固定方法,充分利用了先验信息,确保了BDS/GPS测姿的模糊度固定成功率和可靠性。为验证算法的可行性,采用不同场景的多组实测数据进行了验证分析,结果表明,本文给出的单频BDS/GPS测姿算法是有效、可靠的,具有很高的模糊度固定成功率,总体可达99%,具有良好的应用前景。

  12. Voltage-dependent potassium currents during fast spikes of rat cerebellar Purkinje neurons: inhibition by BDS-I toxin.

    Science.gov (United States)

    Martina, Marco; Metz, Alexia E; Bean, Bruce P

    2007-01-01

    We characterized the kinetics and pharmacological properties of voltage-activated potassium currents in rat cerebellar Purkinje neurons using recordings from nucleated patches, which allowed high resolution of activation and deactivation kinetics. Activation was exceptionally rapid, with 10-90% activation in about 400 mus at +30 mV, near the peak of the spike. Deactivation was also extremely rapid, with a decay time constant of about 300 mus near -80 mV. These rapid activation and deactivation kinetics are consistent with mediation by Kv3-family channels but are even faster than reported for Kv3-family channels in other neurons. The peptide toxin BDS-I had very little blocking effect on potassium currents elicited by 100-ms depolarizing steps, but the potassium current evoked by action potential waveforms was inhibited nearly completely. The mechanism of inhibition by BDS-I involves slowing of activation rather than total channel block, consistent with the effects described in cloned Kv3-family channels and this explains the dramatically different effects on currents evoked by short spikes versus voltage steps. As predicted from this mechanism, the effects of toxin on spike width were relatively modest (broadening by roughly 25%). These results show that BDS-I-sensitive channels with ultrafast activation and deactivation kinetics carry virtually all of the voltage-dependent potassium current underlying repolarization during normal Purkinje cell spikes.

  13. Population genetic structure and mating system in the hybrid zone between Pinus sibirica Du Tour and P. pumila (Pall.) Regel at the Eastern Baikal Lake shore

    OpenAIRE

    E. A. Petrova; S. N. Goroshkevich; Y.S. Belokon; D.V. Politov

    2013-01-01

    Genetic structure of sympatric Pinus sibirica Du Tour and P. pumila (Pall.) Regel populations and putative interspecific hybrids between them was analyzed in the Baikal Lake region (Barguzin Biosphere Natural Reserve, Davsha River basin) by means of 31 allozyme loci controlling 18 enzyme systems. Several alleles at loci Adh-1, Fest-2, Lap-3, Pgi-1, Sod-3 and Skdh-1 were diagnostic for P. sibirica, while alleles typical for P. pumila were detected at loci Gdh, Got-3, Lap-3, Mdh-2, Mdh-4, Pepca...

  14. 白芍化学成分的UPLC/Q-TOF-MS分析%Analysis on chemical constituents of Paeonia lactiflora Pall.by UPLC/Q-TOF-MS

    Institute of Scientific and Technical Information of China (English)

    母会丹; 朱靖博; 丁燕; 寇自农; 王振中; 萧伟

    2013-01-01

    采用超高压液相色谱-飞行时间质谱(UPLC/Q-TOF-MS)在正离子、负离子模式下分析了白芍(Paeonia lactiflora Pall.)甲醇提取物中的化学成分.液相色谱分离条件为:色谱柱:Waters ACQUITYTM UPLC BEH C18(100×2.1mm,1.7μm),乙腈和0.1%甲酸水溶液梯度洗脱,体积流量为0.2 mL/min,质谱条件为:Waters ACQUITY Q-TOF-MS质谱仪,电喷雾接口,正、负离子模式检测.共推测出9个化合物的化学结构,分别为没食子酰基蔗糖,芍药苷亚硫酸酯,芍药内酯苷,芍药苷,没食子酰芍药苷及其3种同分异构体和苯甲酰芍药苷.探讨总结了芍药苷类化合物可能的裂解方式.%An ultra-performance liquid chromatography/quadrupole time-of-flight mass spectrometric (UPLC/QTOF-MS) method was established to analyze chemical constituents of the methanol extract of Paeonia lactiflora Pall.in positive and negative modes.The chromatographic separation was performed on a Waters ACQUITYTM UPLC BEH C18(100 × 2.1 mm,1.7 μm) using a mobile phase consisting of 0.1% formic acid water solution (A) and acetonitrile (B).The flow rate was 0.2 mL/min.The mass spectrometer was Waters ACQUITY QTOF-MS equipped with an electrospray ionization (ESI) interface in negative and positive modes.The chemical constituents of Paeonia lactiflora Pall.were well isolated and detected by this method.9 compounds were identified,and they were galloylsucrose,paeoniflorin sulfonate,albiflorin,paeoniflorin,galloylpaeoniflorin and its isomers,benzoylpaeoniflorin.The fragmentation pathway of paeoniflorin and albiflorin was inferred referring to the possible fragmentation.The results showed that the method was simple and rapid for the identification of the chemical constituents of Paeonia lactiflora Pall.

  15. LHCb: Measurement of the relative yields of the decay modes $B_{d,s} \\to D^{\\pm}_{(s)}\\pi^{\\mp}$ and $B_{d,s} \\to D^{\\pm}_{(s)} K^{\\pm}$ and determination of $f_d /f_s$ for 7 TeV $pp$ collisions

    CERN Multimedia

    David, P; Morawski, P; Witek, M; Akiba, K; Serra, N; Storaci, B; Tuning, N; Williams, M; Easo, S; Carson, L; Poluektov, A

    2011-01-01

    A fit to the invariant mass distributions is used to determine the relative abundances of the four decay modes $B_{d,s} \\to D^{\\pm}_{(s)}\\pi^{\\mp}$ and $B_{d,s} \\to D^{\\pm}_{(s)} K^{\\mp}$ for $B_{d,s}$ mesons produced in 7 TeV $pp$ collisions at the LHC. From these, the relative branching fractions of the kaon modes with respect to the pion modes, and the value of $f_d /f_s$, are determined.

  16. Cultivating Erect Milkvetch (Astragalus adsurgens Pall.) (Leguminosae) Improved Soil Properties in Loess Hilly and Gullies in China

    Institute of Scientific and Technical Information of China (English)

    WANG Zhan-bin; WANG Qing-yi

    2013-01-01

    Erect milkvetch (Astragalus adsurgens Pall.), a leguminous grass, is a major source of fuel and forage, and has an important role in the restoration of the degraded ecosystems in central and northeastern China. The objective of this work was to investigate how erect milkvetch planting would affect the physical and chemical properties of soil in degraded arable lands. Soil samples at the depths of 0-20 and 20-40 cm were collected from erect milkvetch planting fileds at ages of 0, 1, 2 and 3 yr. Changes in soil bulk density, soil porosity, total N and P, organic matter content, available P, hydrolysable N and available K were measured. The results showed that root biomass and above-ground plant biomass were both significantly increased with plantation age. The significant increase in root nodule biomass was not observed in the first two years. However, it was significantly increased after three years. Root growth of erect milkvetch improved soil structure, and hence, decreased soil bulk density and increased soil porosity. Furthermore, the nitrogen fixation by erect milkvetch and return of erect milkvetch plant to soil increased the soil total N, hydrolysable N and organic matter content of the soil. Low concentrations of P in the soil with erect milkvetch planting could be ascribed to high plant uptakes and possibly to high sequestrations of P in plant biomass. Concentrations of K significantly increased during the first two years of erect milkvetch planting. The high accumulation of K under erect milkvetch cultivation in the first two years could partly be attributed to low plant uptake, and partly to relatively quick recycling within plant-soil systems. Three years after erect milkvetch plantingr, K accumulation at 0-20 cm soil layer was significantly lower than that from non-vegetated field sites, which could be attributed to high plant uptake. These parameters, except for soil bulk density, were all decreased with increasing soil depth. Soil total N, organic

  17. BDS/GPS精密单点定位性能分析%Analysis of Performance of BDS/GPS Combined Precise Point Positioning

    Institute of Scientific and Technical Information of China (English)

    盛传贞; 贾丹; 肖根如; 张京奎

    2016-01-01

    北斗特殊的卫星星座布局导致不同地域用户的卫星观测结构存在差异,基于XMIS、 POHN和MAYG站的数据讨论了北斗星座结构对精密单点定位(PPP)技术定位性能的影响,分析了BDS观测数据对BDS/GPS联合PPP 定位的改善。分析表明,北斗卫星几何结构和卫星频繁升降是导致北斗动态PPP定位精度差的重要原因,因此,对于北斗系统地面观测条件较差的用户站而言,无法基于单北斗动态PPP实现高精度定位,但是可将北斗系统作为有效补充,采用BDS/GPS联合PPP动态定位方式进行高精度定位,虽然该方式对定位精度改善不明显,但是可有效改善收敛速度(约为20%~45%)。%The special constellation geometry of Beidou Navigation Satellite System ( BDS ) causes different observed Geometric Dilution of Precise(GDOP)for users in various regions.The article,based on the data from XMIS,POHN and MAYG stations,mainly discusses the influence of different BDS satellite constellation structures on the positioning results.From the analysis,conclusions can be made as follows:the GDOP and frequent rise and set of BDS satellite is the important reason for the low precision in BDS kinematic PPP,therefore,for users with poor observation conditions for BDS satellite,it′s difficult to achieve high precision kinematic PPP with only BDS data,but these users can use the BDS data as an effective supplementary,and can obtain high precision using kinematic BDS/GPS PPP based on GPS data combined with BDS data.Though the improvement of position accuracy is not obvious,it′s an efficient way for improvement of the convergence rate( about 20~45% ) .

  18. 北斗卫星导航系统伪距差分定位技术研究%Research on the Technology of BDS Pseudorange Differential Positioning

    Institute of Scientific and Technical Information of China (English)

    戴伟; 李明峰; 吴继忠

    2015-01-01

    阐述了北斗卫星导航系统(BDS )伪距差分定位模型,比较了该模型与G PS伪距差分定位模型的差异。结合实例对BDS和GPS的基线解算进行了比较,分析了两模型基线解算结果的精度,发现伪距差分能达到亚米级至米级的精度,可为BDS地基增强建设提供新思路;并探讨了BDS卫星可见数对伪距差分定位的影响,得出有益的结论。%T he model of BDS pseudorange differential positioning is introduced ,and the differences between BDS and GPS for pseudorange differential positioning are discussed . Through two examples of baseline solving ,it is proved that the precision on a level of meter and even sub‐meter may be reached with BDS for pseudorange differential positioning which is beneficial for the development of BDS ground based augmentation system .Furthermore the influence of the number of visible satellites on the precision is discussed and some benefi‐cial conclusions are made.

  19. Research on Process of BDS Writing into ICAO SARPs%北斗系统进入国际民航组织SARPs的研究

    Institute of Scientific and Technical Information of China (English)

    梁思远; 杨文辉

    2014-01-01

    开展北斗系统(BDS)国际标准化工作是BDS发展的一个重要环节,本文对BDS进入国际民航组织的标准和建议措施(SARPs)的主要工作和过程进行了分析研究。首先对国际民航组织现有标准体系进行了研究。对 BDS 进入国际民航组织 SARPs 过程,针对不同 SARPs内容所需要的做的主要工作进行了描述。最后给出了BDS进入国际民航组织SARPs的路线图。%International standardization work is important portion in BDS developing process. The main tasks and process of BDS writing into International Civil Aviation Organization (ICAO) standards and recommended practices (SARPs) are analyzed in this paper. Firstly, the standards system of ICAO is studied. Then the main tasks are described for BDS writing into SARPs different segments. The road map of BDS enters ICAO SARPs is proposed.

  20. Modulation of Kv3 Subfamily Potassium Currents by the Sea Anemone Toxin BDS: Significance for CNS and Biophysical Studies

    OpenAIRE

    Yeung, Shuk Yin M; Thompson, Dawn; Wang, Zhuren; Fedida, David; Robertson, Brian

    2005-01-01

    Kv3 potassium channels, with their ultra-rapid gating and high activation threshold, are essential for high-frequency firing in many CNS neurons. Significantly, the Kv3.4 subunit has been implicated in the major CNS disorders Parkinson’s and Alzheimer’s diseases, and it is claimed that selectively targeting this subunit will have therapeutic utility. Previous work suggested that BDS toxins (“blood depressing substance,” from the sea anemone Anemonia sulcata) were specific blockers for rapidly...

  1. Experimental Study on Paeonia Lactiflora Pall Taken as Low Tension Gastrointestinal Contrast Agent%白芍作为低张力胃肠造影药物的实验研究

    Institute of Scientific and Technical Information of China (English)

    朱力萤; 李雅杰; 贾玉石; 刘鹭鸶

    2014-01-01

    目的:探讨白芍作为低张力胃肠造影药物的可行性。方法:实验分为空白组、阳性对照组、白芍低中高剂量组;采用小鼠碳末排出实验、小肠推进实验和豚鼠离体回肠运动实验观察白芍水提液对肠运动的影响。结果:白芍中高剂量均能够延迟小鼠碳末排出时间,降低小肠推进率,增加豚鼠离体回肠平滑肌振幅变化。结论:白芍具有减慢肠蠕动、松弛肠平滑肌作用,具有作为低张力胃肠造影剂的可行性。%Objective:To explore the feasibility of Paeonia lactiflora Pall was taken as low tension gastroin-testinal contrast agent .Methods: Experiment was divided into control , positive control and low , middle, high dose Paeonia lactiflora Pall groups .Carbon discharge and small intestinal propelling experiment in mice and movement of guinea pigs'isolated ileumwere applied to observe the effects of Paeonia lactiflora Pall water extract on intestinal movement .Results:Paeonia lactiflora Pall of middle and high dose could delay carbon discharge time in mice, reduce the advance rate of mice'small intestinal propelling and increase the changes of amplitude of guinea pigs'isolated ileum smooth muscle .Conclusion: Paeonia lactiflora Pall can slow bowel movement and relax intestinal smooth muscle , which can be taken as low tension gastrointestinal contrast agent to apply .

  2. Determination of Mineral Elements Utilization of Paeonia lactiflora Pall by ICP-AES%ICP-AES法检测芍药对矿质元素的吸收利用

    Institute of Scientific and Technical Information of China (English)

    简在友; 王文全; 李卫东; 孟丽; 许桂芳; 王秋玲; 王丹

    2011-01-01

    The contents of K, Ca, Na, Mg, Fe, Cu and so on in the roots of Paeonia lactiflora Pall and in the soil in which they grew were determined by ICP-AES technique to study the mineral elements utilization of P. Lactiflora Pall. The results indicate that the elements utilization rate of P. Lactiflora Pall is different in different locations, so the contents of mineral elements in the roots of P. Lactiflora Pall and even the quality of medicinal materials coming from them in different locations are different The contents of Ca, Fe, Zn and so on in Chi Shao in Heilongjiang and Inner Mongolia are relatively high. The contents of mineral elements in soil influence not only themselves' utilization but also other mineral elements utilization of P. Lactiflora Pall.%为了分析芍药对土壤矿质元素的吸收利用规律,采用ICP-AES法检测了不同产地芍药根和相应土壤中K,Ca,Na,Mg,Fe,Cu等主要矿质元素含量.结果表明:不同产地的芍药对土壤中矿质元素的吸收利用效率不同,反映在不同产地的芍药根中有些矿质元素含量有明显差异,从而使各地芍药药材质量在矿质元素方面也有差异,以黑龙江和内蒙古等地的赤芍中Ca,Fe,Zn等元素含量偏高;土壤中有些矿质元素不仅影响芍药对这种元素的吸收利用,而且影响芍药对其他元素的吸收利用.

  3. BDS Based on the Uses of the Oceans Icebergs Envisaged for the Service of Mankind%基于 BDS 利用海洋上冰山为人类服务的设想

    Institute of Scientific and Technical Information of China (English)

    郭英起; 范国敏; 刘甫斌; 毕继鑫

    2015-01-01

    The ocean iceberg although called 'Ocean killers',but if humans are able to well prepared in advance ,also can use the tip to the service of humanity .This paper ex‐pounds the ocean iceberg characteristics ,and studied the compass navigation satellite system (BDS) based on the assumption of utilization of marine an iceberg in the service of mankind . The research conclusion can also be for future construction of digital ocean to provide refer‐ence .%海洋上冰山虽然被人们称为“海洋杀手”,但是如果人类能够在远航之前做好充分的准备,亦可以利用冰山为人类服务。本文阐述了海洋上冰山的特点,而且研讨了基于北斗卫星导航系统(BDS )利用海洋上冰山为人类服务的设想。本文研讨的结论也可以为以后数字海洋的建设提供参考。

  4. Isolation and structure identification of chemical principles from Paeonia Lactiflora Pall.%赤芍化学成分的分离与结构鉴定

    Institute of Scientific and Technical Information of China (English)

    王彦志; 石任兵; 刘斌

    2006-01-01

    目的研究毛茛科植物芍药(Paeonia lactiflora Pall.)的化学成分.方法应用色谱技术分离纯化,NMR、MS等波谱方法解析化学结构.结果从赤芍中分离出9个化合物,分别鉴定为:芍药苷(Ⅰ),羟基芍药苷(Ⅱ),苯甲酰芍药苷(Ⅲ),芍药新苷(Ⅳ),4-乙基-芍药苷(Ⅴ),邻苯三酚(Ⅵ),二氢芹菜素(Ⅶ),苯甲酸(Ⅷ),β-谷甾醇(Ⅸ).结论化合物Ⅴ、Ⅵ和Ⅶ为首次从赤芍中分离得到.

  5. 白芍中芍药苷的提取工艺研究%Study on extraction process of paeoniflorin from Paeonia lactiflora Pall

    Institute of Scientific and Technical Information of China (English)

    阎星如; 李英杰; 田杰

    2014-01-01

    Percolation method is used to extract paeoniflorin from Paeonia lactiflora Pall. Referring to the content of Paeoniflorin, orthogonal design was applied for optimum extraction process. The orthogonal experiment, the optimum extraction process conditions: soaking 24 hours in 15 volumes 70% ethanol percolation process can get a higher extraction rate of paeoniflorin.%采用渗漉法对白芍中芍药苷进行提取,以芍药苷为指标,用正交试验采用3因素3水平对工艺进行优化,得到的较佳工艺条件为浸渍24 h,用15倍体积70%的乙醇渗漉提取可以获得较高的芍药苷提取率。

  6. An Enhanced Box-Wing Solar Radiation pressure model for BDS and initial results

    Science.gov (United States)

    Zhao, Qunhe; Wang, Xiaoya; Hu, Xiaogong; Guo, Rui; Shang, Lin; Tang, Chengpan; Shao, Fan

    2016-04-01

    Solar radiation pressure forces are the largest non-gravitational perturbations acting on GNSS satellites, which is difficult to be accurately modeled due to the complicated and changing satellite attitude and unknown surface material characteristics. By the end of 2015, there are more than 50 stations of the Multi-GNSS Experiment(MGEX) set-up by the IGS. The simple box-plate model relies on coarse assumptions about the dimensions and optical properties of the satellite due to lack of more detailed information. So, a physical model based on BOX-WING model is developed, which is more sophisticated and more detailed physical structure has been taken into account, then calculating pressure forces according to the geometric relations between light rays and surfaces. All the MGEX stations and IGS core stations had been processed for precise orbit determination tests with GPS and BDS observations. Calculation range covers all the two kinds of Eclipsing and non-eclipsing periods in 2015, and we adopted the un-differential observation mode and more accurate values of satellite phase centers. At first, we tried nine parameters model, and then eliminated the parameters with strong correlation between them, came into being five parameters of the model. Five parameters were estimated, such as solar scale, y-bias, three material coefficients of solar panel, x-axis and z-axis panels. Initial results showed that, in the period of yaw-steering mode, use of Enhanced ADBOXW model results in small improvement for IGSO and MEO satellites, and the Root-Mean-Square(RMS) error value of one-day arc orbit decreased by about 10%~30% except for C08 and C14. The new model mainly improved the along track acceleration, up to 30% while in the radial track was not obvious. The Satellite Laser Ranging(SLR) validation showed, however, that this model had higher prediction accuracy in the period of orbit-normal mode, compared to GFZ multi-GNSS orbit products, as well with relative post

  7. Uniform Design for Optimizating Regeneration Shoots Directly from Tender Leaves and Plant Regeneration System of Rhododendron chrysanthum Pall.%基于均匀设计优化牛皮杜鹃嫩叶直接再生芽苗及植株再生体系

    Institute of Scientific and Technical Information of China (English)

    李玉梅; 姜云天; 孙智慧

    2008-01-01

    [Objective] The experimental was aimed to screen the optimum regeneration shoot induction media and rooting media for tender leaves of Rhododendron chrysanthum Pall.[Method] The tender leaves of Rhododendron chrysanthum Pall were taken as explants to select the optimum bud induction media and rooting media through uniform design and the screening results were verified.[Result] The optimum media for regeneration shoot of Rhododendron chrysanthum Pall contained 1/4 MS,3.70 mg/L ZT, 0.02 mg/L IAA and 1.00 mg/L KT and its induction rate was 95.5% and the rooting media contained modified MS, 0.10 mg/L IAA and 0.07 mg/L NAA and its rooting rate was 98%. [Conclusion] Through this experiment, regeneration systems for regeneration shoot and regenerated plant from tender leaves of Rhododendron chrysanthum Pall were created successfully.

  8. 超声辅助水代法提取芍药籽油工艺条件优化%Optimization of ultrasound-assisted aqueous extraction of oil from Paeonia lactiflora Pall. seed

    Institute of Scientific and Technical Information of China (English)

    2016-01-01

    研究超声辅助水代法提取芍药籽油的工艺条件,并对其脂肪酸组成进行分析.研究了超声时间、液料比、超声功率和超声温度4个主要因素对芍药籽出油率的影响.在单因素试验的基础上,采用响应面法对超声辅助水代法提取工艺进行了优化.优化后的最佳提取工艺条件为:超声时间56 min,超声温度54℃,液料比8:1,超声功率885 W.在最佳工艺条件下,芍药籽出油率为27.99%.利用GC-MS分析芍药籽油脂肪酸组成,共鉴定出19种脂肪酸,主要脂肪酸为亚麻酸(48.01%)、亚油酸(41.30%),总不饱和脂肪酸含量大于90%.%The process conditions of ultrasound-assisted aqueous extraction of oil from Paeonia lactiflora Pall. seed were studied, and fatty acid composition of the oil was analyzed. The effects of four factors on extraction rate of Paeonia lactiflora Pall. seed oil were studied, including ultrasonic time,ratio of liquid to solid, ultrasonic power and ultrasonic temperature. Based on single factor experiment, the extraction process of Paeonia lactiflora Pall. seed oil was optimized by response surface methodology. The optimal extraction conditions were obtained as follows:extraction time 56 min,extraction temperature 54℃,ratio of liquid to solid 8:1 and ultrasonic power 885 W. Under these conditions,the extraction rate of Paeonia lactiflora Pall. seed oil was 27. 99%. The fatty acid composition of Paeonia lactiflora Pall. seed oil was analyzed by GC-MS,and nineteen kinds of fatty acids were identified. The main fatty acids in Paeonia lactiflora Pall. seed oil were linolenic acid(48. 01%)and linoleic acid(41. 30%),and the total content of unsaturated fatty acids was above 90%.

  9. Performance Analysis on Carrier Phase-Based Tightly-Coupled GPS/BDS/INS Integration in GNSS Degraded and Denied Environments

    Directory of Open Access Journals (Sweden)

    Houzeng Han

    2015-04-01

    Full Text Available The integration of Global Navigation Satellite Systems (GNSS carrier phases with Inertial Navigation System (INS measurements is essential to provide accurate and continuous position, velocity and attitude information, however it is necessary to fix ambiguities rapidly and reliably to obtain high accuracy navigation solutions. In this paper, we present the notion of combining the Global Positioning System (GPS, the BeiDou Navigation Satellite System (BDS and low-cost micro-electro-mechanical sensors (MEMS inertial systems for reliable navigation. An adaptive multipath factor-based tightly-coupled (TC GPS/BDS/INS integration algorithm is presented and the overall performance of the integrated system is illustrated. A twenty seven states TC GPS/BDS/INS model is adopted with an extended Kalman filter (EKF, which is carried out by directly fusing ambiguity fixed double-difference (DD carrier phase measurements with the INS predicted pseudoranges to estimate the error states. The INS-aided integer ambiguity resolution (AR strategy is developed by using a dynamic model, a two-step estimation procedure is applied with adaptively estimated covariance matrix to further improve the AR performance. A field vehicular test was carried out to demonstrate the positioning performance of the combined system. The results show the TC GPS/BDS/INS system significantly improves the single-epoch AR reliability as compared to that of GPS/BDS-only or single satellite navigation system integrated strategy, especially for high cut-off elevations. The AR performance is also significantly improved for the combined system with adaptive covariance matrix in the presence of low elevation multipath related to the GNSS-only case. A total of fifteen simulated outage tests also show that the time to relock of the GPS/BDS signals is shortened, which improves the system availability. The results also indicate that TC integration system achieves a few centimeters accuracy in

  10. Performance analysis on carrier phase-based tightly-coupled GPS/BDS/INS integration in GNSS degraded and denied environments.

    Science.gov (United States)

    Han, Houzeng; Wang, Jian; Wang, Jinling; Tan, Xinglong

    2015-04-14

    The integration of Global Navigation Satellite Systems (GNSS) carrier phases with Inertial Navigation System (INS) measurements is essential to provide accurate and continuous position, velocity and attitude information, however it is necessary to fix ambiguities rapidly and reliably to obtain high accuracy navigation solutions. In this paper, we present the notion of combining the Global Positioning System (GPS), the BeiDou Navigation Satellite System (BDS) and low-cost micro-electro-mechanical sensors (MEMS) inertial systems for reliable navigation. An adaptive multipath factor-based tightly-coupled (TC) GPS/BDS/INS integration algorithm is presented and the overall performance of the integrated system is illustrated. A twenty seven states TC GPS/BDS/INS model is adopted with an extended Kalman filter (EKF), which is carried out by directly fusing ambiguity fixed double-difference (DD) carrier phase measurements with the INS predicted pseudoranges to estimate the error states. The INS-aided integer ambiguity resolution (AR) strategy is developed by using a dynamic model, a two-step estimation procedure is applied with adaptively estimated covariance matrix to further improve the AR performance. A field vehicular test was carried out to demonstrate the positioning performance of the combined system. The results show the TC GPS/BDS/INS system significantly improves the single-epoch AR reliability as compared to that of GPS/BDS-only or single satellite navigation system integrated strategy, especially for high cut-off elevations. The AR performance is also significantly improved for the combined system with adaptive covariance matrix in the presence of low elevation multipath related to the GNSS-only case. A total of fifteen simulated outage tests also show that the time to relock of the GPS/BDS signals is shortened, which improves the system availability. The results also indicate that TC integration system achieves a few centimeters accuracy in positioning based

  11. Design and Research of GPS/BDS Airborne Equipment in General Aviation%通用航空GPS/BDS机载设备研究及设计

    Institute of Scientific and Technical Information of China (English)

    贺星; 方成

    2016-01-01

    本文描述了 GPS/BDS 机载设备的总体架构和详细设计方法。基带处理部分,给出了基于PMF-FFT的捕获算法。基带处理电路主要完成对射频通道传送过来的中频信号进行采样、数字滤波、信号处理、功能解算等功能。GPS/BDS 机载设备具备兼容 GPS、BDS 和 GLONASS卫星导航系统的能力;具备卫星导航系统历书、星历、原始测量数据输出、RAIM处理、差分处理、多种数据格式输出、BIT系统自检、工作状态提示等能力。%This paper describes the structure and design method in detail for the GPS/BDS of airborne equipment. In the baseband processing parts, the acquisition algorithm based on PMF-FFT is presented. Baseband processing circuit mainly complete the collection, the digital filtering, the signal processing and function calculating of intermediate frequency signal that from RF channel. GPS airborne equipment has the ability of satellite navigation system, meanwhile has the capability of compatible with GPS, BDS and GLONASS. The equipment has ability of receiving almanac and ephemeris of satellite navigation system, the original measurement data output, RAIM processing, difference processing, a variety of data format output, BIT system self-checking, status display and so on.

  12. GPS/BDS的RTK定位算法研究%Real-Time Kinematic Positioning Algorithm of GPS/BDS

    Institute of Scientific and Technical Information of China (English)

    王世进; 秘金钟; 李得海; 祝会忠

    2014-01-01

    针对附加模糊度参数的Kalman滤波函数模型和随机模型,提出了一种确定实时动态(real-time kinematic,RTK)定位中Kalman滤波参数的方法.利用该算法,采用自编的GPS/BDS RTK定位程序处理了实测的GPS/BDS短基线数据,对比和分析了GPS、BDS、GPS/BDS三种RTK定位组合模式下的定位精度水平.在短基线的情况下,GPS/BDS的RTK定位精度相对于GPS或者BDS没有明显提高,但是得到固定解所需的时间明显减少.

  13. A geometry-free and ionosphere-free multipath mitigation method for BDS three-frequency ambiguity resolution

    Science.gov (United States)

    Chen, Dezhong; Ye, Shirong; Xia, Jingchao; Liu, Yanyan; Xia, Pengfei

    2016-08-01

    Because of the unknown systematic errors and special satellite constellations in the Beidou system (BDS), it is difficult to quickly and reliably determine the ambiguity over long-range baselines in continuously operating reference station (CORS) network. This study seeks to improve the effectiveness and reliability of BDS ambiguity resolution (AR) by combining the geometry-free and ionosphere-free (GFIF) combination and multipath mitigation algorithm. The GFIF combination composed with three-frequency signals is free of distance-dependent errors and can be used to determine the narrow lane ambiguity. The presence of multipath errors means that not all ambiguities can be correctly achieved by rounding the averaged GFIF ambiguity series. A multipath model of the single-differenced (SD) GFIF combination from the previous period is established for each individual satellite. This model is subtracted from the SD GFIF combination for the current day to remove the effects of multipath errors. Using three triangle networks with lengths of approximately 120, 80 and 50 km, we demonstrate that the proposed method improves the AR performance. The ambiguity averaged first fixing time is typically less than 1801 s for inclined geosynchronous orbit (IGSO) and medium earth orbit (MEO) satellites and less than 2007 s for the ˜ 42° elevation geostationary earth orbit (GEO) C02 satellite. However, it is more time consuming for the low-elevation GEO satellites C04 (˜ 18°) and C05 (˜ 28°). Kalman filtering is used to estimate the troposphere delays and two unfixed ambiguities by employing the ionosphere-free observations of all ambiguity-fixed/unfixed satellites. The experimental results show that only tens of seconds are required for AR in around 90 km baselines.

  14. Petrography and Geochemistry (Trace, Ree and Pge of Pedda Cherlo Palle Gabbro-Diorite Pluton, Prakasam Igneous Province, Andhra Pradesh, India

    Directory of Open Access Journals (Sweden)

    Subramanyam K.S.V.

    2015-09-01

    Full Text Available Prakasam Igneous Province (PIP is an important geological domain in the Eastern Dharwar Craton (EDC, found in the junction zone between the EDC and Eastern Ghat Mobile Belt (EGMB. The Pedda Cherlo Palle (PCP gabbros are massive, leucocratic-mesocractic, and show cumulus textures with minerals plagioclase, cpx, and amphiboles. Compositionally, plagioclase is a labradorite-bytownite, cpx is diopside to augite, olivines are hyalosiderites and amphiboles are magnesiohornblendes. PCP gabbros have normal SiO2, high Al2O3, moderate to high TiO2, Na2O and medium Fe2O3, so, classified as subalkaline tholeiitic gabbros. Fractionated rare earth element (REE patterns, high abundance of large ion lithofile elements (LILE and transitional metals coupled with light REE (LREE relative enrichment over heavy REE (HREE and Nb are characteristics of partial melting of depleted mantle and melts that have undergone fractional crystalisation. These partial melts are enriched in LREE and LILE, due to the addition of slab derived sediment and fluids. PCP gabbros contain low abundance (5.1 to 24.6 ng/g of platinum group elements (PGE, and show an increase in the order Ir>Os>Pt>Ru»Pd>Rh. We propose that the subduction related intraoceanic island arc might have accreted to the southeastern margin of India to the east of Cuddapah basin in a collisional regime that took place during Ur to Rodinia amalgamations.

  15. Population genetic structure and mating system in the hybrid zone between Pinus sibirica Du Tour and P. pumila (Pall. Regel at the Eastern Baikal Lake shore

    Directory of Open Access Journals (Sweden)

    E.A. Petrova

    2013-12-01

    Full Text Available Genetic structure of sympatric Pinus sibirica Du Tour and P. pumila (Pall. Regel populations and putative interspecific hybrids between them was analyzed in the Baikal Lake region (Barguzin Biosphere Natural Reserve, Davsha River basin by means of 31 allozyme loci controlling 18 enzyme systems. Several alleles at loci Adh-1, Fest-2, Lap-3, Pgi-1, Sod-3 and Skdh-1 were diagnostic for P. sibirica, while alleles typical for P. pumila were detected at loci Gdh, Got-3, Lap-3, Mdh-2, Mdh-4, Pepca, Pgi-1, Pgd-2, Pgd-3, Pgm-1 and Pgm-2. All hybrids were heterozygous for the diagnostic Skdh-2 locus. Classification into hybrids and parental species using PCA analysis of multilocus allozyme genotypes had good correspondence with diagnoses made by morphological and anatomical analyses. Approximately 27% of embryos in P. pumila seeds had P. sibirica paternal contribution, and 8% of haplotypes in effective pollen pool combined alleles typical for P. pumila and P. sibirica, and therefore were classified as pollinated by the hybrids. About 83% of embryos in seeds from the hybrids most likely originated from fertilization by P. sibirica pollen, 14% from P. pumila and 3% from hybrid trees. This result favours the view that hybrids make both male and female contributions to the reproductive output of the population and confirm the presence of backcrosses and F2 hybrids.

  16. RAIM Availability and Results Analysis Under BDS%BDS系统下RAIM算法可用性及结果分析

    Institute of Scientific and Technical Information of China (English)

    阎贝; 段可植

    2014-01-01

    The availability of RAIM algorithm, the principle of fault detection and fault recovery are introduced in this paper. According to the requirements of BDS positioning accuracy, the availability of RAIM algorithm under BDS were obtained by simulation calculation and influences of DOP value on RAIM and ANP availability are analyzed.%本文介绍了接收机自主完好性监测(RAIM)算法的可用性、故障检测及故障排除的原理及方法流程,结合BDS系统下定位精度的需求,通过仿真计算,得到了BDS系统下RAIM算法的可用性结果,并分析了DOP值对RAIM算法可用性及实际导航性能(ANP)的影响。

  17. Accuracy Analysis of Precise Point Positioning Based on Combined GPS and BDS%基于GPS和BDS组合精密单点定位精度分析

    Institute of Scientific and Technical Information of China (English)

    张震

    2015-01-01

    Beidou navigation positioning system ( BDS) has begun to provide such services as continuous passive po-sitioning,navigation and timing to most areas of the Asia Pacific since the end of 2012.In the article,theory of GPS and BDS precise point positioning (PPP) is described briefly.The ionosphere-free model and Kalman filtering model are given here.Then several static and dynamic measurement data of GPS and BDS are used to calculate PPP .Before calcu-lating the station position , we correct the tropospheric delay , relative error , the earth rotation error and so on .And we make a comparison of standalone experiment result between BDS and GPS .The experimental results show to us that the number of visible GPS satellites is a little more than BDS normally ,but sometimes just the opposite .The constellation of BDS is well and it has good performance .Therefore,the precision of static PPP reaches to 9.89 cm and the dynamic ex-periment reaches to the level of dm.As to the positioning trajectory,the BDS’s is just the same as the dynamic GPS’s, which conforms to the demand of BDS design .When combined GPS and BDS, we get a more precise result with static precision 1~2cm and the dynamic result within 10cm.%北斗定位导航系统( BDS)于2012年底开始向亚太大部分地区正式提供连续无源定位、导航、授时等服务。本文简要介绍GPS和BDS精密单点定位( PPP )的原理,给出了无电离层组合模型及Kalman滤波模型,并利用实测的GPS和BDS静态与动态观测数据进行精密单点定位实验。实验改正了对流层延迟影响、相对论效应、地球自转、多路径影响和观测噪声等误差,比较了GPS、BDS和二者组合定位的实验结果。实验结果表明:通常情况GPS平均可视卫星颗数多于BDS系统,但在特殊情况下,BDS卫星颗数多于GPS;BDS卫星星座分布良好,系统性能稳定,静态PPP收敛后精度达到9.89 cm,动态PPP精度能达到分米级

  18. 北斗RTK在铁路勘测中应用研究及精度分析%Application and accuracy analysis of BDS RTK in Railway Survey

    Institute of Scientific and Technical Information of China (English)

    魏好; 梁永

    2015-01-01

    研究试验BDS、GPS、BDS+GPS三种RTK测量模式下水平和高程精度情况,分析不同定位模式间坐标较差,比较测量结果与已知点间的坐标较差。研究结果表明, BDS RTK 定位精度与GPS RTK基本相当,满足铁路测量规范的要求;BDS和GPS组合RTK定位在山区、林区和城区作业环境困难地区较单系统定位更具优越性。

  19. Single-frequency, dual-GNSS versus dual-frequency, single-GNSS: a low-cost and high-grade receivers GPS-BDS RTK analysis

    Science.gov (United States)

    Odolinski, Robert; Teunissen, Peter J. G.

    2016-11-01

    The concept of single-frequency, dual-system (SF-DS) real-time kinematic (RTK) positioning has become feasible since, for instance, the Chinese BeiDou Navigation Satellite System (BDS) has become operational in the Asia-Pacific region. The goal of the present contribution is to investigate the single-epoch RTK performance of such a dual-system and compare it to a dual-frequency, single-system (DF-SS). As the SF-DS we investigate the L1 GPS + B1 BDS model, and for DF-SS we take L1, L2 GPS and B1, B2 BDS, respectively. Two different locations in the Asia-Pacific region are analysed with varying visibility of the BDS constellation, namely Perth in Australia and Dunedin in New Zealand. To emphasize the benefits of such a model we also look into using low-cost ublox single-frequency receivers and compare such SF-DS RTK performance to that of a DF-SS, based on much more expensive survey-grade receivers. In this contribution a formal and empirical analysis is given. It will be shown that with the SF-DS higher elevation cut-off angles than the conventional 10° or 15° can be used. The experiment with low-cost receivers for the SF-DS reveals (for the first time) that it has the potential to achieve comparable ambiguity resolution performance to that of a DF-SS (L1, L2 GPS), based on the survey-grade receivers.

  20. Gating currents from a Kv3 subfamily potassium channel: charge movement and modification by BDS-II toxin.

    Science.gov (United States)

    Wang, Zhuren; Robertson, Brian; Fedida, David

    2007-11-01

    Kv3 channels have a major role in determining neuronal excitability, and are characterized by ultra-rapid kinetics of gating and a high activation threshold. However, the gating currents, which occur as a result of positional changes of the charged elements in the channel structure during activation, are not well understood. Here we report a study of gating currents from wild-type Kv3.2b channels, expressed in human embryonic kidney (HEK) cells to facilitate high time-resolution recording. On-gating currents (I(g,on)) had extremely rapid kinetics such that at +80 mV, the time constant for the decay of I(g,on) was only approximately 0.3 ms. Decay of I(g,on) appeared mono-exponential at all potentials studied, and in support of this, the charge-voltage (Q-V) relationship was fitted with a single Boltzmann function, supporting the idea that only one charge system is required to account for the time course of I(g,on) and the voltage dependence of Q(on). The voltage (V((1/2))) for half movement of gating charge was -8.4 +/- 4.0 mV (n = 6), which closely matches the voltage dependence of activation of Kv3.2b ionic currents reported before. Depolarizations to more positive potentials than 0 mV decreased the amplitude and slowed the decay of the off-gating currents (I(g,off)), suggesting that a rate-limiting step in opening was present in Kv3 channels as in Shaker and other Kv channels. Return of charge was negatively shifted along the potential axis with a V((1/2)) of Q(off) of -80.9 +/- 0.8 mV (n = 3), which allowed approximately 90% charge return upon repolarization to -100 mV. BDS-II toxin apparently reduced I(g,on), and greatly slowed the kinetics of I(g,on), while shifting the Q-V relationship in the depolarizing direction. However, the Q-V relationship remained well fitted by a single Boltzmann function. These data provide the first description of Kv3 gating currents and give further insight into the interaction of BDS toxins and Kv3 channels.

  1. The Algorithm of Single-epoch Integer Ambiguity Resolution between Middle-range BDS Network RTK Reference Stations

    Directory of Open Access Journals (Sweden)

    ZHU Huizhong

    2016-01-01

    Full Text Available The algorithm of double frequency carrier phase integer ambiguity resolution between middle-range reference stations at single-epoch is proposed. The ambiguity candidates of B1 frequency and B2 frequency carrier phase are selected by linear relationship between carrier phase ambiguities of B1 frequency and B2 frequency carrier phase. The double difference ionosphere delay errors can be calculated by the ambiguity candidates of double frequency carrier phase. Then the linear calculation model of double difference ionosphere delay errors can be established by the double difference ionosphere delay errors according to the spatial relationship between the ionosphere delay errors of each satellites on reference stations. And the ambiguities of B1 frequency and B2 frequency carrier phase are searched and fixed in the establishing of the linear calculation model of double difference ionosphere delay errors. This algorithm is tested by the data of BDS CORS network. The results indicate that the double difference integer ambiguity between reference stations can be fixed at single-epoch, and this algorithm avoids the effect of cycle clips.

  2. Paeonia lactiflora Pall. protects against ANIT-induced cholestasis by activating Nrf2 via PI3K/Akt signaling pathway

    Directory of Open Access Journals (Sweden)

    Ma X

    2015-09-01

    Full Text Available Xiao Ma,1,2 Yan-ling Zhao,2 Yun Zhu,3 Zhe Chen,1,2 Jia-bo Wang,4 Rui-yu Li,1,4 Chang Chen,1,2 Shi-zhang Wei,1,2 Jian-yu Li,3 Bing Liu,5 Rui-lin Wang,3 Yong-gang Li,3 Li-fu Wang,3 Xiao-he Xiao4 1Pharmacy College, Chengdu University of Traditional Chinese Medicine, Chengdu, People’s Republic of China; 2Department of Pharmacy, 302 Military Hospital of People’s Liberation Army, Beijing, People’s Republic of China; 3Department of Integrative Medical Center, 302 Military Hospital of People’s Liberation Army, Beijing, People’s Republic of China; 4China Military Institute of Chinese Medicine, 302 Military Hospital of People’s Liberation Army, Beijing, People’s Republic of China; 5School of Chinese Medicine, The University of Hong Kong, Hong Kong Background: Paeonia lactiflora Pall. (PLP, a traditional Chinese herbal medicine, has been used for hepatic disease treatment over thousands of years. In our previous study, PLP was shown to demonstrate therapeutic effect on hepatitis with severe cholestasis. The aim of this study was to evaluate the antioxidative effect of PLP on alpha-naphthylisothiocyanate (ANIT-induced cholestasis by activating NF-E2-related factor 2 (Nrf2 via phosphatidylinositol 3-kinase (PI3K/Akt signaling pathway. Materials and methods: Liquid chromatography-mass spectrometry (LC-MS was performed to identify the main compounds present in PLP. The mechanism of action of PLP and its therapeutic effect on cholestasis, induced by ANIT, were further investigated. Serum indices such as total bilirubin (TBIL, direct bilirubin (DBIL, aspartate aminotransferase (AST, alanine aminotransferase (ALT, alkaline phosphatase (ALP, γ-glutamyl transpeptidase (γ-GT, and total bile acid (TBA were measured, and histopathology of liver was also performed to determine the efficacy of treatment with PLP. Moreover, in order to illustrate the underlying signaling pathway, liver glutathione (GSH content and mRNA or protein levels of glutamate

  3. Digital Gene Expression Analysis to Screen Disease Resistance-Relevant Genes from Leaves of Herbaceous Peony (Paeonia lactiflora Pall. Infected by Botrytis cinerea.

    Directory of Open Access Journals (Sweden)

    Saijie Gong

    Full Text Available Herbaceous peony (Paeonia lactiflora Pall. is a well-known traditional flower in China and is widely used for landscaping and garden greening due to its high ornamental value. However, disease spots usually appear after the flowering of the plant and may result in the withering of the plant in severe cases. This study examined the disease incidence in an herbaceous peony field in the Yangzhou region, Jiangsu Province. Based on morphological characteristics and molecular data, the disease in this area was identified as a gray mold caused by Botrytis cinerea. Based on previously obtained transcriptome data, eight libraries generated from two herbaceous peony cultivars 'Zifengyu' and 'Dafugui' with different susceptibilities to the disease were then analyzed using digital gene expression profiling (DGE. Thousands of differentially expressed genes (DEGs were screened by comparing the eight samples, and these genes were annotated using the Gene ontology (GO and Kyoto encyclopedia of genes and genomes (KEGG database. The pathways related to plant-pathogen interaction, secondary metabolism synthesis and antioxidant system were concentrated, and 51, 76, and 13 disease resistance-relevant candidate genes were identified, respectively. The expression patterns of these candidate genes differed between the two cultivars: their expression of the disease-resistant cultivar 'Zifengyu' sharply increased during the early stages of infection, while it was relatively subdued in the disease-sensitive cultivar 'Dafugui'. A selection of ten candidate genes was evaluated by quantitative real-time PCR (qRT-PCR to validate the DGE data. These results revealed the transcriptional changes that took place during the interaction of herbaceous peony with B. cinerea, providing insight into the molecular mechanisms of host resistance to gray mold.

  4. 基于HPLC技术分析白芍根茎与主根部分的主成分含量差异%Determination of paeoniflorin and albiflorin in taproot and rhizome of Paeonia lactiflora Pall.

    Institute of Scientific and Technical Information of China (English)

    郑金凤; 王景红; 宗志勇; 路广义

    2016-01-01

    Objective To determine the content of paeoniflorin and albiflorin in the different sample treatment of Paeonia lactiflora Pall. . Methods The HPLC method was used to detected, the chro-matographic condition was RP-C18 (4 mm×250 mm,5 μm) column with HCN-water(25 ∶ 75) as mobile phase, flow velocity was 1. 0 mL/min, with the detection wavelength was 230 nm, column temperature was 30℃. Results The content of paeoniflorin and albiflorin in taproot and rhizome of Paeonia lactiflora Pall. was increased after peeled. Whether boiled or peeled, the content of paeoniflorin and albiflorin in rhizome was higher than taproot of Paeonia lactiflora Pall. . Conclusion Rhizome of Paeonia lactiflora Pall. has the potential to use as medicinal parts, it could be exploited and used in further.%目的:采用高效液相色谱法检测亳芍不同的样品处理方法下主根和根茎部分芍药苷和芍药内酯苷的含量。方法采用高效液相色谱法,色谱条件:C18柱( phenomenex公司,250 mm ×4.6 mm,5μm);流动相:乙腈-水(25:75);检测波长为230 nm;柱温:30℃;流速为1.0 mL/min。结果经过煮制后的白芍去皮主根或根茎所含芍药苷和芍药内酯苷的总含量低于未煮制;白芍的主根和根茎部分去皮后芍药苷和芍药内酯苷总含量高于未去皮的主根和根茎;无论是否煮制,是否去皮,白芍根茎中芍药苷和芍药内酯苷的含量均高于主根。结论白芍根茎有作为药用部位的基础。

  5. Rapid ambiguity resolution over medium-to-long baselines based on GPS/BDS multi-frequency observables

    Science.gov (United States)

    Gong, Xiaopeng; Lou, Yidong; Liu, Wanke; Zheng, Fu; Gu, Shengfeng; Wang, Hua

    2017-02-01

    Medium-long baseline RTK positioning generally needs a long initial time to find an accurate position due to non-negligible atmospheric delay residual. In order to shorten the initial or re-convergence time, a rapid phase ambiguity resolution method is employed based on GPS/BDS multi-frequency observables in this paper. This method is realized by two steps. First, double-differenced un-combined observables (i.e., L1/L2 and B1/B2/B3 observables) are used to obtain a float solution with atmospheric delay estimated as random walk parameter by using Kalman filter. This model enables an easy and consistent implementation for different systems and different frequency observables and can readily be extended to use more satellite navigation systems (e.g., Galileo, QZSS). Additional prior constraints for atmospheric information can be quickly added as well, because atmospheric delay is parameterized. Second, in order to fix ambiguity rapidly and reliably, ambiguities are divided into three types (extra-wide-lane (EWL), wide-lane (WL) and narrow-lane (NL)) according to their wavelengths and are to be fixed sequentially by using the LAMBDA method. Several baselines ranging from 61 km to 232 km collected by Trimble and Panda receivers are used to validate the method. The results illustrate that it only takes approximately 1, 2 and 6 epochs (30 s intervals) to fix EWL, WL and NL ambiguities, respectively. More epochs' observables are needed to fix WL and NL ambiguity around local time 14:00 than other time mainly due to more active ionosphere activity. As for the re-convergence time, the simulated results show that 90% of epochs can be fixed within 2 epochs by using prior atmospheric delay information obtained from previously 5 min. Finally, as for positioning accuracy, meter, decimeter and centimeter level positioning results are obtained according to different ambiguity resolution performances, i.e., EWL, WL and NL fixed solutions.

  6. TEQC与CF2PS在BDS数据预处理中的应用%Application of TEQC and CF2PS in BDS Data Pre-Processing

    Institute of Scientific and Technical Information of China (English)

    党金涛; 李建文; 黄海; 罗璠

    2014-01-01

    This paper analyzes the advantages and disadvantages of TEQC and CF2PS ap-plied in the pre-processing of the BDS observational data,and describes the principle and meth-od of TEQC and CF2PS in quality check,data edit and file plot.For poor human-computer in-teraction and slow manual operation of TEQC and CF2PS,the program for the pre-processing of the BDS observational data is wrote,and the functions is actualied of batch processing and graph visualization.Finally,combined with an practical application example,the basic approach of BDS data pre-processing is researched,and the results show that the data quality is improved greatly.%分析了利用 TEQC和 CF2PS进行 BDS观测数据预处理的优缺点,介绍了 TE-QC和CF2PS在质量检查、数据编辑和文件绘图中的原理与方法。针对 TEQC和 CF2PS人机交互性差和手动操作慢的缺点,编写了 BDS观测数据预处理软件,实现了批处理和图形可视化的功能。最后结合实例,探讨了数据预处理的基本思路,结果表明,经过预处理后的数据质量得到了较大提高。

  7. A Method for Calculating BDS Triple-Frequency Multipath Error and its Analysis%一种计算北斗三频多路径的方法及其结果分析

    Institute of Scientific and Technical Information of China (English)

    时荣

    2015-01-01

    多路径误差分析是北斗卫星导航系统性能评估的一项重要内容。本文给出了一种新的计算3频多路径误差的方法,该方法只需对B1和B2载波相位观测值进行处理就能得到3个频率的伪距多路径误差。利用MGEX跟踪站的数据计算了BDS的多路径误差,从GPS和BDS多路径误差比较以及纬度、轨道和频率因素分析了BDS多路径误差的特性,结果表明,BDS多路径误差小于0.5 m,符合质量检查要求,其性能优于GPS卫星系统。%Analysis of multipath error is an important task to evaluate BDS performance.A method for calculating BDS triple-fre-quency multipath error is proposed.The method can get three frequency pseudo range multipath errors when only the B1 and B2 carrier phase is processed.Using the MGEX tracking stations data, BDS multipath errors are calculated.The difference between GPS and BDS multipath and the effect of latitude, orbit and frequency for multipath is analyzed.The results show that BDS multipath error is less than 0.5m which satisfies quality checking.BDS performance is superior to GPS satellite system.

  8. Breeding and Matching Technology of Suaeda salsa(L.﹚Pall. Greening Cultivation Strains%盐地碱蓬绿化栽培品系的选育与配套技术

    Institute of Scientific and Technical Information of China (English)

    邵秋玲; 谢小丁

    2014-01-01

    General saplings are not adapt to the saline-alkali soil and grow normally under the special soil conditions of the Yellow River Delta. This phenomenon has seriously hampered the afforestation and urban greening. Based on the detailed in-vestigation and researches of the local high salt tolerance of wild halophyte Suaeda salsa (L.﹚ Pall., a number of dominant plants adapting to severe saline were found. Through harvesting and planting alone, and generational purifying, two Suaeda salsa (L.﹚ Pall. greening cultivation strains tolerating salinity level of 2% or more were bred. Supporting cultivation techniques were studied to overcome the reliance on foreign soil greening coastal saline, form greening plant species with local charac-teristics, and enrich the biodiversity of the coastal saline areas.%黄河三角洲地区特殊的土壤条件导致一般苗木因不适应当地的盐碱地条件而不能正常生长,严重制约了造林及城市绿化。对当地耐盐程度高的野生耐盐植物盐地碱蓬[Suaeda salsa(L.)Pall.]进行详细调查和研究,发现了多个适宜重度盐碱地绿化的优势单株,通过单采单种,逐代纯合,选出了2个耐盐程度在2%以上的盐地碱蓬绿化栽培品系。研究了其配套栽培技术,在一定程度上克服了盐碱地依赖客土绿化的弊端,形成具有当地特色的绿化植物种类,丰富了盐碱地区的生物多样性。

  9. HPLC法双波长同时测定赤芍中4种成分的含量%HPLC Ddouble Wavelength Simultaneous Determination of Four Components in Paeonia lactiflora Pall

    Institute of Scientific and Technical Information of China (English)

    柳梦婷; 方婧; 孙昊; 吴宏伟; 付梅红; 杨洪军

    2014-01-01

    目的:采用高效液相色谱法,在不同检测波长下同时测定赤芍中儿茶素、芍药苷、苯甲酸、丹皮酚4种成分的含量。方法色谱柱为Diamonsil C185μm 250×4.6 mm,以0.1%甲酸-乙腈为流动相进行梯度洗脱,检测波长为230 nm (儿茶素、芍药苷、苯甲酸),275 nm(丹皮酚),流速1 mL·min-1,柱温30℃。结果不同产地赤芍中4种成分含量差异较大,7批不同产地赤芍药材中儿茶素、芍药苷、苯甲酸和丹皮酚的含量范围分别为:0%~0.052%、1.044%~4.326%、0.126%~0.249%、0.022%~1.060%。结论本法操作简便、准确、重复性好,可用于赤芍药材中儿茶素、芍药苷、苯甲酸、丹皮酚含量的测定。%Objective To establish a HPLC method for determining the content of catechin, paeoniflorin, benzoic acid and paeonol in Paeonia lactiflora Pall at different wavelength. Methods It was performed on Diamonsil colunm C18 μm 250×4.6 mm, mobile phase was 0.1%methanoic acid-methyl cyanide, gradient elute, detection wavelength was 230 nm (catechin, paeoniflorin, benzoic acid) and 275 nm (paeonol), flow rate was 1mL·min-1, and colunm temperature was 30℃. Results The contents of four active components in Paeonia Lactiflora Pall from different habitats were quite different. The contents of catechin, paeoniflorin, benzoic acid and paeonol were 0%~0.052%, 1.044~4.326%, 0.126~0.249%, 0.022~1.060%respectively. Conclusion The method is simple and accurate with good reproducibility, it is suitable for determining the contents of catechin, paeoniflorin, benzoic acid and paeonol in Paeonia lactiflora Pall.

  10. Analysis of BDS/GPS Integrated Navigation System in Asia-Pacific Region%BDS和GPS导航系统亚太地区定位性能分析

    Institute of Scientific and Technical Information of China (English)

    雷俊科

    2015-01-01

    通过仿真在轨的北斗卫星和GPS卫星,利用STK覆盖功能分析北斗、GPS和北斗/GPS组合导航系统在亚太地区的定位性能,并比较北斗/GPS组合卫星导航系统与单系统相比的优势。仿真结果表明北斗/GPS组合卫星导航系统在亚太地区有更好的可用性,能提供更高精度的导航定位服务。%The working BDS and GPS satellites are simulated in this paper. The performance of BDS,GPS and BDS/GPS integrated navigation system is analyzed by using STK coverage tools. The result shows that BDS/GPS integrated navigation system has a better availability and it can provide more precise poisoning service.

  11. Smart Device-Supported BDS/GNSS Real-Time Kinematic Positioning for Sub-Meter-Level Accuracy in Urban Location-Based Services

    Directory of Open Access Journals (Sweden)

    Liang Wang

    2016-12-01

    Full Text Available Using mobile smart devices to provide urban location-based services (LBS with sub-meter-level accuracy (around 0.5 m is a major application field for future global navigation satellite system (GNSS development. Real-time kinematic (RTK positioning, which is a widely used GNSS-based positioning approach, can improve the accuracy from about 10–20 m (achieved by the standard positioning services to about 3–5 cm based on the geodetic receivers. In using the smart devices to achieve positioning with sub-meter-level accuracy, a feasible solution of combining the low-cost GNSS module and the smart device is proposed in this work and a user-side GNSS RTK positioning software was developed from scratch based on the Android platform. Its real-time positioning performance was validated by BeiDou Navigation Satellite System/Global Positioning System (BDS/GPS combined RTK positioning under the conditions of a static and kinematic (the velocity of the rover was 50–80 km/h mode in a real urban environment with a SAMSUNG Galaxy A7 smartphone. The results show that the fixed-rates of ambiguity resolution (the proportion of epochs of ambiguities fixed for BDS/GPS combined RTK in the static and kinematic tests were about 97% and 90%, respectively, and the average positioning accuracies (RMS were better than 0.15 m (horizontal and 0.25 m (vertical for the static test, and 0.30 m (horizontal and 0.45 m (vertical for the kinematic test.

  12. UNDERGRADUATE MBBS AND BDS STUDENTS’ OPINION BASED SURVEY ON CURRENT TEACHING PRACTICES IN PHARMACOLOGY AND CHANGES RECOMMENDED FOR BETTERMENT OF THE SAME

    Directory of Open Access Journals (Sweden)

    Mohammed Waseem

    2014-12-01

    Full Text Available CONTEXT: Pharmacology is one of the most fundamental subjects in the field of medicine and a good grasp of this subject is vital for any clinical practitioner. The teaching of pharmacology in medical and dental colleges of India has evolved from mere didactic lectures to audio-visual aid based lectures and computer based learning. Evolution of teaching methods is an on-going process and a docent needs proper feedback from the pupils regarding their opinion on what is satisfactory and what needs improvement. AIMS: By way of this survey-based study we aim to grasp the MBBS and BDS students’ opinion regarding the teaching practices in pharmacology and changes recommended for the betterment of the same. METHODS AND MATERIALS: After obtaining due approval of the Institutional Ethics Committee, the study was conducted amongst 2nd year exam going MBBS and BDS students of M R Medical College and S Nijalingappa Dental College, Gulbarga, Karnataka in the Department of Pharmacology M R Medical College. An exhaustive questionnaire based survey was prepared of 17 questions with choices ranging from 3-8 different options. RESULTS AND CONCLUSION: The result of our study favours the need for pharmacology as a subject to be more clinically oriented as well as being technologically sound. The students overall have a positive outlook of pharmacology (53% and consider lectures as the most appropriate and helpful teaching method (62%. Introduction of group discussion is one change that is warranted by students overwhelmingly (41%, followed by introduction of clinical pharmacology exercises (31%. A vast majority of the students (70% found the lectures in pharmacology to be interesting and want them to be more clinically oriented. The importance of pharmacology in clinical decision making is well understood by the majority of students and they aim to act in that behest. Also, we find that computer based learning is a new and important tool coming up in the arsenal

  13. Smart Device-Supported BDS/GNSS Real-Time Kinematic Positioning for Sub-Meter-Level Accuracy in Urban Location-Based Services.

    Science.gov (United States)

    Wang, Liang; Li, Zishen; Zhao, Jiaojiao; Zhou, Kai; Wang, Zhiyu; Yuan, Hong

    2016-12-21

    Using mobile smart devices to provide urban location-based services (LBS) with sub-meter-level accuracy (around 0.5 m) is a major application field for future global navigation satellite system (GNSS) development. Real-time kinematic (RTK) positioning, which is a widely used GNSS-based positioning approach, can improve the accuracy from about 10-20 m (achieved by the standard positioning services) to about 3-5 cm based on the geodetic receivers. In using the smart devices to achieve positioning with sub-meter-level accuracy, a feasible solution of combining the low-cost GNSS module and the smart device is proposed in this work and a user-side GNSS RTK positioning software was developed from scratch based on the Android platform. Its real-time positioning performance was validated by BeiDou Navigation Satellite System/Global Positioning System (BDS/GPS) combined RTK positioning under the conditions of a static and kinematic (the velocity of the rover was 50-80 km/h) mode in a real urban environment with a SAMSUNG Galaxy A7 smartphone. The results show that the fixed-rates of ambiguity resolution (the proportion of epochs of ambiguities fixed) for BDS/GPS combined RTK in the static and kinematic tests were about 97% and 90%, respectively, and the average positioning accuracies (RMS) were better than 0.15 m (horizontal) and 0.25 m (vertical) for the static test, and 0.30 m (horizontal) and 0.45 m (vertical) for the kinematic test.

  14. Investigated the Wild Resources of the Endangered Species Trillium kamtschaticum Pall .in Jiaohe City,Jilin Province%吉林省蛟河市濒危药用植物白花延龄草资源调查1)

    Institute of Scientific and Technical Information of China (English)

    刘继永; 邵财; 张浩; 曲正义

    2014-01-01

    To provide the references for setting up the measures of wild resources protection and sustain-able utilization of T .kamtschaticum Pall ,researching on the dangerous ecological mechanism ,By studied on the geographical distribution ,entironment ,Community types and unit area reserves of the wild re-sources of the endangered species T .kamtschaticum Pall .in Jiaohe City ,Jilin Province.%通过对吉林省蛟河市濒危药用植物白花延龄草野生资源的地理分布、生态环境、群落类型及单位面积蕴藏量等调查研究,为制定野生白花延龄草资源的保护与可持续利用措施,研究其致危生态机理,提供参考。

  15. Studies on morphological structure of leaves of Suaeda salsa(L.) Pall in two different saline environments%两种不同盐浓度环境中盐地碱蓬叶 的形态结构特征研究

    Institute of Scientific and Technical Information of China (English)

    章英才; 张晋宁

    2001-01-01

    通过光学显微镜和扫描电镜观察,研究了盐生植物盐地碱蓬叶的形态解剖学特征.结果表明,盐地碱蓬是典型的贮盐植物;生长在两种不同盐浓度环境中的盐地碱蓬,在叶外部形态及内部结构方面表现出显著的性状差异.%The morphological and anatomical features of leaves of halophyte Suaeda salsa (L.) Pall were observed and studied using microscope and scanning electron microscope. The results show that Suaeda salsa (L.) Pall is a typical salt store plant, which shows significant character difference in external morphology and internal structure of leaf in two different saline environments.

  16. A Comparative Study of Static Pseudorange Single Point Positioning by Double Frequency between BDS and GPS%北斗/GP S双频静态伪距单点定位结果对比分析∗

    Institute of Scientific and Technical Information of China (English)

    卢伟俊; 万庆涛; 范江涛; 张杰; 王晓岚; 李婧华; 马冠一

    2016-01-01

    BeiDou Navigation Satellite System ( BDS) was put into operation in Asian Pacific region in December 2012. To give a comprehensively comparative study of static pseudorange single point positioning between BDS and Global Positioning System (GPS), the double frequency data was sampled at 10s interval for 56h in Beijing in April 2014. The number of visible BDS satellites is larger than that of GPS. However, since BDS constellation is not finished yet, it has a positioning dilution of precision (PDOP) value of 2. 49, which is a little larger than that of GPS:2. 12. The standard error of unit weight is 2. 28m and 2. 50m for BDS and GPS, respectively. This indicates that BDS has a better psuedorange precision than GPS. The occurrence frequency of gross error is 0. 57%for BDS and 1. 02%for GPS, which shows that the usability of BDS is better than that of GPS. After removing the gross error, inner coincidence accuracy of BDS is better than that of GPS. It is 3. 24m in horizontal direction and 4. 40m in vertical direction for BDS. It is 3. 90m horizontally and 5. 47m vertically for GPS. But deviation between standard coordinate of BDS (8. 50m, 3. 73m, -0. 80m) is less satisfying than that of GPS (4. 50m, 2. 25m, 0. 56m), which means that BDS is better than GPS on stability but less accurate than GPS. It can be predicted that BDS will achieve better performance with the improvement and fulfillment of its constellation.%北斗卫星导航系统于2012年12月对亚太地区正式投入运行。为了对相关性能参数进行全面的分析比较,利用2014年4月在北京采集的观测时间56 h历元间隔10 s的原始双频数据,分别得到北斗与全球定位系统的静态伪距单点定位结果。北斗的可见卫星数多于全球定位系统,但是由于星座布局尚未完善,北斗的位置精度因子( Position Dilution of Precision, PDOP)均值为2.49,略大于全球定位系统的位置精度因子均值2.12。北斗的单位权中误差均值为2.28 m

  17. 中药白芍愈伤组织的培养及其中芍药苷的测定%Study on Callus Culture of Paeonia lactiflora pall and Determination of Paeoniflorin in Callus

    Institute of Scientific and Technical Information of China (English)

    凌庆枝; 董丽辉; 章聪敏; 高莉莉; 江海龙; 冯定军; 周海滨

    2013-01-01

    [Objective] To establish the methods of callus culture,and determine the content of paeoniflorin in callus cells of Paeonia lactiflora pall.[Method] Leaves and stem sterilized were cut into tissue pieces and inoculated on different induction medium and regeneration medium.Paeoniflorin was extracted from callus and the content of paeoniflorin was determined by TLC and HPLC.[Result] The results showed that medium of 1/2MS + 0.2 mg/L 2,4-D + 2.0 mg/L 6-BA + 0.2 mg/L NAA were fit for stem callus induction,and medium of 1/2MS + 1.0 mg/L 2,4-D + 1.5 mg/L 6-BA were fit for leaves callus induction.Regeneration medium of callus is 1/2MS + 0.1 mg/L 2,4-D + 1.0 mg/L ZT + 0.5 mg/L NAA.The content of paeoniflorin of callus is 0.068 9 mg/g by HPLC.[Conclusion] Leaf and stem of Paeonia lactiflora pall could be induced to form callus.There are paeoniflorin in callus cells of Paeonia lactiflora pall.%[目的]建立中药白芍愈伤组织培养的方法,并测定其中芍药苷的含量.[方法]以白芍叶、茎为外植体,接种于不同的愈伤诱导培养基和继代培养基上培养愈伤组织,并提取愈伤组织中的芍药苷,用TLC和HPLC法测定愈伤组织中芍药苷的含量.[结果]适合白芍茎的诱导愈伤培养基是1/2MS +0.2 mg/L2,4-D +2.0 mg/L 6-BA +0.2 mg/L NAA,叶的最适诱导培养基是1/2MS+ 1.0 mg/L 2,4-D+ 1.5 mg/L 6-BA,白芍愈伤继代培养适合培养基为1/2MS +0.1 mg/L2,4-D+ 1.0 mg/L ZT +0.5 mg/L NAA.经HPLC测定每克干白芍愈伤组织中的芍药苷含量为0.068 9 mg.[结论]中药白芍的叶和茎可诱导形成愈伤组织,且形成的愈伤组织中含有芍药苷.

  18. A Geometry-Based Cycle Slip Detection and Repair Method with Time-Differenced Carrier Phase (TDCP for a Single Frequency Global Position System (GPS + BeiDou Navigation Satellite System (BDS Receiver

    Directory of Open Access Journals (Sweden)

    Chuang Qian

    2016-12-01

    Full Text Available As the field of high-precision applications based on carriers continues to expand, the development of low-cost, small, modular receivers and their application in diverse scenarios and situations with complex data quality has increased the requirements of carrier-phase data preprocessing. A new geometry-based cycle slip detection and repair method based on Global Position System (GPS + BeiDou Navigation Satellite System (BDS is proposed. The method uses a Time-differenced Carrier Phase (TDCP model, which eliminates the Inner-System Bias (ISB between GPS and BDS, and it is conducive to the effective combination of GPS and BDS. It avoids the interference of the noise of the pseudo-range with cycle slip detection, while the cycle slips are preserved as integers. This method does not limit the receiver frequency number, and it is applicable to single-frequency data. The process is divided into two steps to detect and repair cycle slip. The first step is cycle slip detection, using the Improved Local Analysis Method (ILAM to find satellites that have cycle slips; The second step is to repair the cycle slips, including estimating the float solution of changes in ambiguities at the satellites that have cycle slips with the least squares method and the integer solution of the cycle slips by rounding. In the process of rounding, in addition to the success probability, a decimal test is carried out to validate the result. Finally, experiments with filed test data are carried out to prove the effectiveness of this method. The results show that the detectable cycle slips number with GPS + BDS is much greater than that with GPS. The method can also detect the non-integer outliers while fixing the cycle slip. The maximum decimal bias in repair is less than that with GPS. It implies that this method takes full advantages of multi-system.

  19. A Geometry-Based Cycle Slip Detection and Repair Method with Time-Differenced Carrier Phase (TDCP) for a Single Frequency Global Position System (GPS) + BeiDou Navigation Satellite System (BDS) Receiver.

    Science.gov (United States)

    Qian, Chuang; Liu, Hui; Zhang, Ming; Shu, Bao; Xu, Longwei; Zhang, Rufei

    2016-12-05

    As the field of high-precision applications based on carriers continues to expand, the development of low-cost, small, modular receivers and their application in diverse scenarios and situations with complex data quality has increased the requirements of carrier-phase data preprocessing. A new geometry-based cycle slip detection and repair method based on Global Position System (GPS) + BeiDou Navigation Satellite System (BDS) is proposed. The method uses a Time-differenced Carrier Phase (TDCP) model, which eliminates the Inner-System Bias (ISB) between GPS and BDS, and it is conducive to the effective combination of GPS and BDS. It avoids the interference of the noise of the pseudo-range with cycle slip detection, while the cycle slips are preserved as integers. This method does not limit the receiver frequency number, and it is applicable to single-frequency data. The process is divided into two steps to detect and repair cycle slip. The first step is cycle slip detection, using the Improved Local Analysis Method (ILAM) to find satellites that have cycle slips; The second step is to repair the cycle slips, including estimating the float solution of changes in ambiguities at the satellites that have cycle slips with the least squares method and the integer solution of the cycle slips by rounding. In the process of rounding, in addition to the success probability, a decimal test is carried out to validate the result. Finally, experiments with filed test data are carried out to prove the effectiveness of this method. The results show that the detectable cycle slips number with GPS + BDS is much greater than that with GPS. The method can also detect the non-integer outliers while fixing the cycle slip. The maximum decimal bias in repair is less than that with GPS. It implies that this method takes full advantages of multi-system.

  20. 固相萃取-高效液相色谱-电喷雾串联质谱法分析芍药和酒芍药的水溶性化学成分%Analysis of Components in Aqueous of Paeonia Lactiflora Pall and Paeonia Lactiflora Pall Preparation with Wine by Solid Phase Extraction-High Performance Liquid ChromatographyElectrospray Ionization Mass Spectrometry

    Institute of Scientific and Technical Information of China (English)

    何忠梅; 孙佳明; 张辉; 王华

    2009-01-01

    利用固相萃取-高效液相色谱-电喷雾串联质谱法(SPE-HPLC-DAD-ESI-MS2)分析了芍药(Paeonia lactiflora Pall.)及其炮制品酒芍药(Paeonia lactiflora Pall.preparated with wine)水煎液中化学成分的种类和结构,并对其主要有效成分芍药苷进行了定量测定.用此方法得到了芍药和酒芍药水煎液的紫外色谱(UV)图、总离子流色谱(TIC)图和萃取离子色谱(EIC)图,以及相应色谱峰的紫外光谱图和EIC/MS2的质谱图.对其进行解析,发现芍药和酒芍药水煎液中所含化学成分基本一致,但酒芍药水煎液中除主要活性成分芍药苷含量基本未变外,其它酚酸性化学成分含量相对于芍药水煎液均有不同程度的下降.同时鉴别出芍药和酒芍药水煎液中共同含有的16种成分,它们分别是:蔗糖、(+)-儿茶素、Mudanpioside E、芍药新苷、芍药内酯苷、氧化芍药苷、芍药苷、羟基芍药苷、没食子酰芍药苷*、牡丹皮苷Ⅰ、苯甲酰芍药苷、三没食子酰葡萄糖、四没食子酰葡萄糖、五没食子酰葡萄糖.以上分析说明,酒炙可保留芍药的药效,同时"缓和其酸寒伐肝之性".

  1. BDS/GPS精密单点定位收敛时间与定位精度的比较%Convergence Time and Positioning Accuracy Comparison between BDS and GPS Precise Point Positioning

    Institute of Scientific and Technical Information of China (English)

    张小红; 左翔; 李盼; 潘宇明

    2015-01-01

    BDS/GPS data fromMGEX were processed by TriP 2 0. software developed at Wuhan University . Both static and kinematic float PPP are tested by adopting precise satellite orbits and clocks provided by Research Center of GNSS ,Wuhan University .The results show that the convergence time of BDS static PPP is about 80 min while kinematic PPP is about 100 min .For 3 h observations ,static positioning accuracy of 5 cm and kinematic positioning accuracy of 8 cm in horizontal ,about 12 cm in vertical can be achieved . Simil ar to GPS PPP ,precision in east component is worse than north .At present ,BDS PPP needs longer convergence time than GPS PPP to reach an absolute positioning accuracy of cm~dm due to the l ack of global tracking stations and the limited accuracy of orbit and clock products .%采用武汉大学卫星导航定位技术研究中心发布的北斗精密卫星轨道和钟差,在TriP 20.软件的基础上实现了BDS PPP定位算法,并利用大量实测数据进行了BDS/GPS静态PPP和动态PPP浮点解试验。结果表明,BDS静态PPP的收敛时间约为80 mi n ,动态PPP的收敛时间为100 mi n;对于3 h的观测数据,静态 PPP收敛后定位精度优于5 cm ,动态 PPP收敛后水平方向优于8 cm ,高程方向约12 cm;与GPS PPP类似,东分量上定位精度较北分量稍差。当前由于BDS的全球跟踪站有限,精密轨道和钟差精度不如GPS ,因此BDS PPP的收敛时间较GPS长,但收敛后可实现厘米至分米级的绝对定位。

  2. BDS与GPS群延迟的异同分析与应用%Analysis and research of difference between BDS-TGD and GPS-TGD

    Institute of Scientific and Technical Information of China (English)

    王彬; 刘经南; 隋心

    2015-01-01

    针对BDS群延迟与GPS群延迟在定义以及导航定位应用中的差异问题,该文提出了在当前各接收机生产厂家输出的BDS广播星历RINEX 2.1x格式不统一情况下,BDS广播星历群延迟信息的正确使用方法,以及在进行导航定位解算时应该注意的问题.从观测方程出发,详细阐述BDS-TGD与GPS-TGD的异同,针对当前的BDS广播星历现状,通过对比分析得出各接收机生产厂家对BDS广播星历群延迟信息的处理方式,并给出各种情况下该信息的正确使用方法.利用实测的BDS观测数据进行实验取得了良好的定位效果.该文对于BDS群延迟定义的认识及其在导航定位应用中正确使用具有一定的参考价值.

  3. BDS satellite flying area definition and monitoring ability of ground tracking network%利用广播星历确定BDS卫星飞行区域

    Institute of Scientific and Technical Information of China (English)

    徐华君; 王海涛

    2016-01-01

    针对北斗卫星导航系统(BDS)采用异构星座,其GEO、IGSO卫星飞行区域并非全球覆盖,传统监测站覆盖性能分析方法不宜直接应用以及导航卫星在轨运行时受到多种摄动影响,其实际运行区域与设计区域有别等问题,提出采用实测数据界定BDS导航卫星飞行区域的方法,并以BDS试验评估系统国内跟踪站网及GPS/BDS测试评估系统跟踪站网为例,分析了监测网的覆盖性能.实验证明本文提出的方法可较为合理、能够较准确地描述BDS地面跟踪站网的监测覆盖性能.

  4. Analysis of BDS Applications to Carry out Conformity Assessment%北斗卫星导航系统应用产品开展合格评定工作的思考

    Institute of Scientific and Technical Information of China (English)

    许冬彦; 马丽娜; 王维嘉

    2015-01-01

    As well as BeiDou navigation satellite system (BDS)begin to provide Full operational Service for China and its surrounding areas formally by the end of 2012,the government also gave out policies about BDS applications,and the industry and regional application demonstration propel steadily,BDS ushers a major historical opportunity of “large-scale,community, industrialization and internationalization”.Application products based on the BDS start to put into the mass market,there are so many types of manufacturers and products but lack of brand trust,so the consumers have difficult to choose from these products,these will impede the development of BDS products in domestic and international markets.Carry out conformity as-sessment of BDS applications products will help to improve the law-abiding awareness of market players,build market order of fair competition,ensure the quality and safety of various goods and service in the market,protect consumer,guide the orderly development of the market,and promote international trade and BDS industry developed health and sustainable.In this paper, we researched the significance of BDS conformity assessment,studied needs analysis as well as domestic and overseas status of BDS conformity assessment,put forward some proposal about working mechanism to carry out conformity assessment of BDS, hoping to play a role as reference to carry out conformity assessment work of products of satellite applications.%随着北斗卫星导航系统2012年底正式提供运行服务,国家对北斗系统应用政策出台,北斗系统导航行业和区域示范应用稳步推进,北斗系统导航迎来“规模化、社会化、产业化、国际化”的重大历史机遇。合格评定作为证明执行法律和贯彻标准的一个有力手段,世界发达国家非常重视推行合格评定工作,普遍实行了产品认证及市场准入制度。开展北斗系统应用产品的合格评定有利于提高市场主体的守法意

  5. 白刺果实提取物的体外抑菌活性研究%In vitro antimicrobial activity of extracts from fruits of Nitraria sibirica pall.

    Institute of Scientific and Technical Information of China (English)

    张桂霞; 齐敬浩; 任旭; 陈贵林

    2012-01-01

    Evaluated the in vitro antimicrobial activity of Nitraria sibirica Pall. Fruits extracts to provide the basis for utilizating Nitraria resources and developing natural food antiseptic. Nitraria sibirica Pall. fruits were extracted with 95% ethanol,then fractionated with petroleum ether,chloroform,ethyl acetate and n-butanol respectively. The filter paper disc diffusion method was performed to determine the influence of the different extracts on the growths of 3 bacterium(Escherichia coil, Bacillus subtilis, Staphyloccocus aureus) and 4 fungus(Penici//ium sp., Rhizopus sp. ,Aspergillus niger, Saccharomyces cerevisiae ) ,and the minimal inhibitory concentrations(MICs) of ethyl acetate extracts againts the 3 kinds of bacterium were tested using the doubling dilution method.The results showed that the ethyl acetate,ethanol and chloroform extracts had antibacterial activity against the 3 kinds of bacterium. In addition ,the ethyl acetate extracts presented higher antibacterial activity than others. The MIC of ethyl acetate extract against Escherichia coil, Bacillus subtilis, Staphyloccocus aureus were 25,25, 50mg/mL. None of the extracts exhibited inhibitory activity against Fungus.%探讨白刺果实提取物的体外抑菌活性,以期为白刺果实的综合利用及天然食品防腐剂的开发提供依据。用石油醚、氯仿、乙酸乙酯和正丁醇分别对白刺果实95%乙醇提取物进行萃取,纸片法测定各萃取部分对大肠杆菌、枯草芽孢杆菌、金黄色葡萄球菌、酵母菌、青霉、根霉和黑曲霉7种常见的食源性污染菌的抑菌效果,并通过倍比稀释法测定乙酸乙酯部分对其中3种细菌的最低抑菌浓度。结果表明:白刺果实乙酸乙酯部分、乙醇部分和氯仿部分对3种供试细菌均有抑菌作用,其中乙酸乙酯部分抑菌效果最好,且乙酸乙酯部分对3种细菌的抑制强弱顺序为:枯草芽孢杆菌〉大肠杆菌〉金黄色葡萄球菌

  6. A drift line bias estimator: ARMA-based filter or calibration method, and its application in BDS/GPS-based attitude determination

    Science.gov (United States)

    Liang, Zhang; Yanqing, Hou; Jie, Wu

    2016-06-01

    The multi-antenna synchronized receiver (using a common clock) is widely applied in GNSS-based attitude determination (AD) or terrain deformations monitoring, and many other applications, since the high-accuracy single-differenced carrier phase can be used to improve the positioning or AD accuracy. Thus, the line bias (LB) parameter (fractional bias isolating) should be calibrated in the single-differenced phase equations. In the past decades, all researchers estimated the LB as a constant parameter in advance and compensated it in real time. However, the constant LB assumption is inappropriate in practical applications because of the physical length and permittivity changes of the cables, caused by the environmental temperature variation and the instability of receiver-self inner circuit transmitting delay. Considering the LB drift (or colored LB) in practical circumstances, this paper initiates a real-time estimator using auto regressive moving average-based (ARMA) prediction/whitening filter model or Moving average-based (MA) constant calibration model. In the ARMA-based filter model, four cases namely AR(1), ARMA(1, 1), AR(2) and ARMA(2, 1) are applied for the LB prediction. The real-time relative positioning model using the ARMA-based predicting LB is derived and it is theoretically proved that the positioning accuracy is better than the traditional double difference carrier phase (DDCP) model. The drifting LB is defined with a phase temperature changing rate integral function, which is a random walk process if the phase temperature changing rate is white noise, and is validated by the analysis of the AR model coefficient. The auto covariance function shows that the LB is indeed varying in time and estimating it as a constant is not safe, which is also demonstrated by the analysis on LB variation of each visible satellite during a zero and short baseline BDS/GPS experiment. Compared to the DDCP approach, in the zero-baseline experiment, the LB constant

  7. A drift line bias estimator: ARMA-based filter or calibration method, and its application in BDS/GPS-based attitude determination

    Science.gov (United States)

    Liang, Zhang; Yanqing, Hou; Jie, Wu

    2016-12-01

    The multi-antenna synchronized receiver (using a common clock) is widely applied in GNSS-based attitude determination (AD) or terrain deformations monitoring, and many other applications, since the high-accuracy single-differenced carrier phase can be used to improve the positioning or AD accuracy. Thus, the line bias (LB) parameter (fractional bias isolating) should be calibrated in the single-differenced phase equations. In the past decades, all researchers estimated the LB as a constant parameter in advance and compensated it in real time. However, the constant LB assumption is inappropriate in practical applications because of the physical length and permittivity changes of the cables, caused by the environmental temperature variation and the instability of receiver-self inner circuit transmitting delay. Considering the LB drift (or colored LB) in practical circumstances, this paper initiates a real-time estimator using auto regressive moving average-based (ARMA) prediction/whitening filter model or Moving average-based (MA) constant calibration model. In the ARMA-based filter model, four cases namely AR(1), ARMA(1, 1), AR(2) and ARMA(2, 1) are applied for the LB prediction. The real-time relative positioning model using the ARMA-based predicting LB is derived and it is theoretically proved that the positioning accuracy is better than the traditional double difference carrier phase (DDCP) model. The drifting LB is defined with a phase temperature changing rate integral function, which is a random walk process if the phase temperature changing rate is white noise, and is validated by the analysis of the AR model coefficient. The auto covariance function shows that the LB is indeed varying in time and estimating it as a constant is not safe, which is also demonstrated by the analysis on LB variation of each visible satellite during a zero and short baseline BDS/GPS experiment. Compared to the DDCP approach, in the zero-baseline experiment, the LB constant

  8. 兴安圆柏嫩枝扦插过程中相关生理特征分析%Analysis of the physiological characteristics during the root formation of cuttings of Sabina davurica (Pall.) Ant.

    Institute of Scientific and Technical Information of China (English)

    郭英超; 李燕玲; 王子岚; 杜克久

    2012-01-01

      In order to discuss the cuttings rooting mechanism and to enhance the rooting rate of Sabina davurica (Pall.) Ant, the variations of the content of the water and nutrient components in twig cuttings were analyzed during the rooting process after treated with different endogenous hormones. The results show that the water and the soluble carbohydrate increased first and decreased later during the rooting process. The content of the soluble amylum presented a single peak curve, the soluble protein was a typical bi-modal curve. The plant hormones treatment promoted nutrient components transformation. All the changes were good for cuttings root-ing.%  为了提高兴安圆柏扦插生根率,探讨兴安圆柏的扦插生根机理,本试验采取不同激素处理兴安圆柏嫩枝插穗,分析嫩枝插条内水分及营养物质含量变化。结果表明,插穗生根过程中,水分、可溶性糖都是先降低后升高的过程,可溶性淀粉变化呈现升-降的单峰曲线,可溶性蛋白变化为升-降-升-降的双峰曲线。激素处理促进插穗内营养物质的转化,促进插穗生根。

  9. Teatro y memoria: la recreación del mundo rural en Las manos, de José Ramón Fernández, Yolanda Pallín y Javier G. Yagüe

    Directory of Open Access Journals (Sweden)

    Vilches de Frutos, M. Francisca

    2002-06-01

    Full Text Available Current research on twentieth-century Spanish theater reveals a high number of historical plays, a tendency that has continued during the last five years. Some of the most significant writers currently writing for the stage are actively revising the recent past in their work. In this context, three playwrights stand out —Jose Ramon Fernandez, Yolanda Pallin and Javier G. Yague— thanks to the critical and commercial success of their Las manos (Hands, a play about young people who live in a rural area of Spain during the decade of the 1960s. The study of the play's themes and its reception bring to light the reasons behind this historical recreation and the favorable response accorded it by critics and audiences.El análisis de las representaciones escénicas llevadas a cabo en España durante el siglo XX permite apreciar la existencia de un elevado número de obras históricas. Esta tendencia ha tenido continuidad en el último lustro, donde algunos de los más destacados autores dramáticos no han dudado en iniciar una revisión del pasado reciente. En este contexto no debe sorprender el éxito crítico y comercial alcanzado por José Ramón Fernández, Yolanda Pallín y Javier G. Yagüe con Las manos, una obra protagonizada por jóvenes pertenecientes al ámbito rural español en la década de los sesenta. El estudio de sus claves temáticas y de su recepción permitirá explicar las razones para recrear este período histórico y las causas de su excelente acogida.

  10. Determination of Amygdalin in Amygdalus pedunculatus Pall Products by Reversed-phase High Performance Liquid Chromatography%反相高效液相色谱法测定长柄扁桃仁产品中苦杏仁苷含量

    Institute of Scientific and Technical Information of China (English)

    寇凯; 许宁侠; 申烨华

    2013-01-01

    A method of reversed-phase high performance liquid chromatography(RP-HPLC) has been developed for the determination of amygdalin in amygdalus pedunculatus pall products.The sample of amygdalin in amygdalus pedunculatus pall was extracted in methanol.The separation was perfomed with a mobile phase of methanol and water and acetonitrile(2∶85∶ 13) and a detection wavelength of 220 nm.The average content of amygdalin in amygdalus pedunculatus pall detected by this method is 1.44 %.The linear range was from 50 to 300 μg/mL(r=0.9996).The limit of detection for amygdalin was 1.2 μg/mL,the average recovery was 98.9% (n=5).The method is accurate,reproducible and can be used for the quality control of amygdalin.%本文采用反相高效液相色谱建立了长柄扁桃仁系列产品中苦杏仁苷含量的测定方法.长柄扁桃仁系列产品中的苦杏仁苷经甲醇提取,以V(甲醇)∶V(水)∶V(乙腈)=2∶85∶13为流动相进行洗脱,在220 nm检测波长下,测得长柄扁桃仁中苦杏仁苷的平均质量分数为1.44%.方法线性范围为50~300 μg/mL,线性相关系数r=0.9996,检出限为1.2 μg/ml,平均回收率为98.97%(n=5).

  11. 基于BDS观测网的卫星钟差完备性监测%Research on Integrity Monitoring of Satellite Clock Error on the Basis of BDS Network

    Institute of Scientific and Technical Information of China (English)

    陈仲怀; 廖超明; 谷守周

    2013-01-01

    卫星钟差质量直接影响高精度用户的定位结果,因此需对钟差实时监测,即为卫星钟差完备性监测,它是导航系统完备性理论体系中重要的组成部分.本文基于BDS伪距观测值,利用多个BDS/GPS基准站计算卫星钟差,并分析各卫星与不同基准站观测值的残差,若某一卫星的观测值残差与其他卫星残差差异超过限值,应给出示警信息,实现BDS卫星钟差的完备性监测.基于上述理论,针对BDS网观测数据进行BDS卫星钟差完备性监测,并分析BDS卫星钟差的监测结果.该方法初步实现了BDS卫星钟差完备性监测,为后续BDS完备性监测理论研究提供了一定的技术支持.

  12. Simulation of Navigation Performance Analysis of SINS/BDS Based on ARS Aidance%ARS辅助SINS/BDS组合导航系统性能仿真分析

    Institute of Scientific and Technical Information of China (English)

    马卫华; 袁建平; 罗建军

    2006-01-01

    捷联惯导/北斗双星定位组合系统(SINS/BDS)可采用间段组合的方式以避免"北斗"系统有源定位暴露目标的缺点;多普勒主动雷达导引头(ARS)可利用波束速度连续辅助惯导,弥补"北斗"系统无速度信息、不能全程使用的缺点.以巡航导弹为应用对象构建了SINS/BDS/ARS卡尔曼组合导航滤波器,探讨利用ARS提高SINS/BDS组合系统精度的潜力.研究表明ARS辅助可降低BDS接收机关闭期间SINS导航误差的增长速度,加快BDS接收机工作期间SINS/BDS组合速度信息的收敛速度,转向机动时辅助效果更好.利用该方法可在不增加设备和成本的前提下提高SINS/BDS组合导航系统精度,降低惯性器件的精度,缩减BDS接收机工作时间,具有一定的应用潜力.

  13. 理化因子对芍药花色苷呈色的影响∗%Effect of Physical and Chemical Factors on Coloring of Anthocyanins Obtained from Herbaceous Peony (Paeonia lactiflora Pall.)

    Institute of Scientific and Technical Information of China (English)

    赵大球; 郝召君; 陶俊

    2015-01-01

    研究了理化因子对芍药花色苷溶液在体外呈色的影响。结果表明:芍药花色苷溶液在黑暗、室温(20℃)等条件下表现稳定;在自然光、紫外光、蓝光、白光、低温(4℃)、氧化剂(H2O2)、还原剂(Na2SO3)、Cu2+、Mn2+、Mg2+、Zn2+、Fe2+等条件下易于降解,颜色变淡;而红光、黄光、高温(40℃、60℃)、Na+对花色苷溶液具有一定的增色作用;不同pH对芍药花色苷溶液呈色影响并不一致。研究结果可为通过理化因子来调控芍药花色奠定基础。%The effect of physical and chemical factors on the coloring of anthocyanins in herbaceous peony (Paeonia lactiflora Pall.) was investigated in this paper. The results showed that darkness and room temperature (20℃) had no effect on the stability of anthocyanins. Furthermore, natural light, ultraviolet light, blue light, white light, low temperature (4℃), oxidant (H2O2), reductant (Na2 SO3 ) , Cu2+, Mn2+, Mg2+, Zn2+and Fe2+promoted the degradation of anthocyanins. In addition, red light, yellow light, high temperature (40℃ and 60℃) and Na+had color enhancing effect on an⁃thocyanins, and different pH value had different color effect on anthocyanins. These results would lay a foundation for regulating P. lactiflora flower color by physical and chemical factors.

  14. BDS thin film damage competition

    Energy Technology Data Exchange (ETDEWEB)

    Stolz, C J; Thomas, M D; Griffin, A J

    2008-10-24

    A laser damage competition was held at the 2008 Boulder Damage Symposium in order to determine the current status of thin film laser resistance within the private, academic, and government sectors. This damage competition allows a direct comparison of the current state-of-the-art of high laser resistance coatings since they are all tested using the same damage test setup and the same protocol. A normal incidence high reflector multilayer coating was selected at a wavelength of 1064 nm. The substrates were provided by the submitters. A double blind test assured sample and submitter anonymity so only a summary of the results are presented here. In addition to the laser resistance results, details of deposition processes, coating materials, and layer count will also be shared.

  15. A Method of BDS Relative Positioning over Long Baseline Considering the Influence of Multipath Effect from GEO Satellite%一种顾及GEO卫星多路径效应影响的BDS长距离相对定位方法

    Institute of Scientific and Technical Information of China (English)

    王敏; 柴洪洲; 刘鸣; 陈艳丽; 刘军

    2016-01-01

    提出了一种北斗卫星导航系统BDS长距离相对定位方法。在该方法的观测量随机模型中,考虑了BDS的GEO卫星伪距观测量中的系统性多路径变化趋势项的影响;并采用基于非组合观测值的 DSOP (Double Station Observation Processing)方法进行数据解算。分别对BDS单系统和BDS/GPS组合相对定位解算结果进行了分析,实验结果都表明采用该方法能够显著提高定位结果的收敛速度。%In this paper a novel method for BDS based relative positioning over long baseline is proposed. The in-fluence of systematic multipath variation is considered in the observation stochastic model. And the Double Station Observation Processing DSOP method that directly uses undifferenced observation is used for relative positioning estimation. By analyzing the positioning result of BDS only solution and BDS/GPS combined solution the distinct improvement in convergence speed is demonstrated.

  16. Palle Qvist's Blog about Digital Teaching

    DEFF Research Database (Denmark)

    Qvist, Palle

    2010-01-01

    Blog created to support the first pedagogical day about e-learning arranged by the official AAU – “Pedagogical open day in Aalborg 17th of March 2010″. New articles added continuosly......Blog created to support the first pedagogical day about e-learning arranged by the official AAU – “Pedagogical open day in Aalborg 17th of March 2010″. New articles added continuosly...

  17. A Control Technology for Plantlets Fast Growing of Rhododendron chrysanthum Pall.in Changbai Mountain%长白山牛皮杜鹃种苗速生调控技术

    Institute of Scientific and Technical Information of China (English)

    顾地周; 沈红梅; 闫中雪; 徐鹏佳; 袁浩; 杨丽娟; 王秋爽; 张学士

    2014-01-01

    We used the plantlets of Rhododendron chrysanthum Pall.to study the main factors with different levels by repeated experiments with multi factorial for establishing a control system of plantlets fast growing of R.chrysanthum.The the main factors with levels for plantlets fast growing of R.chrysanthum are under the light hours of 13 h· d-1 , the interval time of topdressing nutrient solution of 21-22 days, the light intensity of 700-800 lx and the temperature of 26℃.The longitudi-nal growth height and transverse diameter of plantlets of R.chrysanthum were 17.6 cm and 6.0 mm in 25 d, and 26.0 cm and 7.4 mm in 50 d, respectively.The growing height and stem diameter of contrast plant were only 8.8 cm和2.0 mm in 25 d, and 10.2 cm and 2.9 mm in 50 d, respectively.We got the optimization for plantlets fast growing of R.chrysanthum.%本研究以牛皮杜鹃组培苗为供试植物,通过多因子交叉重复试验对影响牛皮杜鹃组培苗快速生长的各主要因素及其水平的作用进行了探讨,旨在探索并建立一种牛皮杜鹃种苗快速生长的调控方法。结果表明:最适合牛皮杜鹃组培苗快速生长的主要因素及其水平是光照时间为13 h· d-1、营养液追施间隔时间为21~22 d、光照强度为700~800 lx和温度为26℃。经过25 d的调控处理,牛皮杜鹃组培苗纵向生长高度和横向直径分别达到17.6 cm和6.0 mm,对照组仅分别达到8.8 cm和2.0 mm;50 d后纵向生长高度和横向直径分别达到26.0 cm和7.4 mm,而对照组仅分别达到10.2 cm和2.9 mm。初步得到牛皮杜鹃种苗速生的优化组合,该组合将有利于牛皮杜鹃种苗的快速生长。

  18. 基于GPS/BDS融合的精密单点定位及精度分析%The Precise Point Positioning and Precision Analysis Based on GPS/BDS Double System

    Institute of Scientific and Technical Information of China (English)

    周超

    2016-01-01

    基于北斗卫星导航系统(BDS)/GPS融合定位在时空基准上具有统一性,在详细阐述了GPS/BDS融合定位的函数模型和随机模型的基础上,利用MATLAB软件编写了双系统融合定位的程序,并处理了实测的GPS/BDS数据,最后从静态定位与动态定位两方面分析了GPS、BDS、GPS/BDS的定位结果.结果表明,这3种方式都能获得厘米级的静态与动态的定位精度,但对统计精度来说,组合方式较单一方式更具优势.

  19. Map-aided BDS/INS Integration Based Track Occupancy Estimation Method for Railway Trains%地图辅助北斗/惯导组合的列车轨道占用估计方法

    Institute of Scientific and Technical Information of China (English)

    刘江; 蔡伯根; 王剑

    2014-01-01

    卫星导航在铁路运输系统众多基于位置的应用服务中具有广阔的应用前景,我国自主建设的北斗卫星导航系统已正式开始提供区域服务,为卫星导航在铁路系统中的应用发展提供了重要契机。在采用卫星导航实现列车定位的过程中,列车轨道占用状态的估计识别是列车位置描述的重要内容和定位正确性必要前提,本文结合高速列车追踪接近预警系统这一应用背景,根据系统功能及性能的实际需求,提出一种基于地图辅助北斗/惯导组合的列车轨道占用估计方法,该方法利用地图辅助信息对北斗/惯导融合所需系统模型进行约束,并采用交互多模型估计策略将列车组合定位过程与轨道占用状态估计进行结合,有效实现了轨道占用识别的实时性和自主性。论文采用实际现场测试数据对所提出的轨道占用估计方法进行了验证,并通过与 GPS模式的比较探讨了我国北斗卫星导航系统在铁路系统应用中的可行性和实际性能。%Satellite navigation has broad prospects in multiple location-based railway applications and services. Presently,the autonomously developed BeiDou Navigation Satellite System (BDS)in China has become capable of providing local services,which is promoting great opportunities for its application and development in rail-way transportation systems.When using the satellite navigation system in train positioning,track occupancy state estimation is an important factor in train position description and an essential precondition of positioning correctness.In this paper,based on the requirements of the high-speed train collision early warning system, the map-aided BDS/INS(Intertial Navigation System)integration based track occupancy estimation method was proposed,in which the assistant information from the electronic track map was involved to constrain the kine-matic models in BDS/INS data fusion,and the

  20. 响应面试验优化微波法提取刺玫籽原花青素的工艺%Optimization of Microwave-Assisted Extraction of Proanthocyanidins from Rosa davurica Pall. Seeds by Response Surface Methodology

    Institute of Scientific and Technical Information of China (English)

    容晨曦; 张秀玲; 李铁柱; 胡济美; 张杰; 李倬林

    2016-01-01

    The microwave-assisted extraction of proanthocyanidins (PC) fromRosa davnrica Pall. seeds was optimized using the response surface methodology. The PC content ofRosa davnrica Pall. seeds was determined to be (1.55± 0.12) g/100 g by iron salt catalysis method. The results of one-factor-at-a-time experiments showed that the addition of 0.2% sodium hexametaphosphate (SH) provided the best stability for the proanthocyanidins. Extraction time, solid to liquid ratio, microwave power, and ethanol concentration were selected as independent variables, while the extraction yield of PC was taken as response variable. The optimization was carried out based on Box-Behnken experimental design by investigating the individual and combined effects of the four factors on the response variable. The optimum extraction conditions were determined as follows: extracting time, 70 s; material to liquid ratio, 1:20 (g/mL); microwave power, 360 W; and ethanol concentration, 60%. Under these conditions, the PC yield in one extraction cycle obtained was 72.58% with a relative error of 1.12% as compared with the model prediction of 73.46% indicating that these parameters are reliable. In first three cycles, 93.19% of the measured PC were extracted.%利用响应面分析,对微波法提取刺玫籽中原花青素工艺进行优化。采用铁盐催化法测定原花青素质量分数,结果表明刺玫籽中原花青素总含量为(1.55±0.12) g/100 g。单因素试验结果表明,六偏磷酸钠添加量为0.2%时能达到最佳稳定效果。在此基础上,选取提取时间、料液比、微波功率、乙醇体积分数为自变量,以原花青素提取率为响应值,采用Box-Behnken设计方法,研究各因素及其交互作用对原花青素提取率的影响。结果表明,最佳工艺参数为:提取时间70 s、料液比1∶20(g/mL)、微波功率360 W、乙醇体积分数60%。经验证,单次提取原花青素的提取率为72.58%,与预测值73.46%

  1. 水分胁迫下 AM 真菌和根瘤菌对沙打旺生长及养分吸收的影响%Inoculation of arbuscular mycorrhizal fungi and Rhizobium on the growth and nutrition uptake of Astragalus adsurgens Pall .under water stress

    Institute of Scientific and Technical Information of China (English)

    吴福勇; 武玉坤; 毕银丽; 齐礼帅; 李丽娟

    2013-01-01

      利用温室盆栽试验研究水分胁迫下接种丛枝菌根(Arbuscular mycorrhizal ,AM)真菌和根瘤菌(Rhizobium meliloti)对沙打旺(Astragalus adsurgens Pall .)生长和养分吸收的影响。在土壤相对含水量65%和35%条件下,分别设不接种(对照)、单接根瘤菌、单接摩西球囊霉(Glomus mosseae)和双接根瘤菌与摩西球囊霉等4个处理。结果发现:干旱胁迫显著抑制沙打旺AM真菌侵染率(P<0.05),而接种根瘤菌在两种水分条件下均显著促进摩西球囊霉对沙打旺根系的侵染(P<0.05)。接种AM真菌不仅显著提高沙打旺对P的吸收(P<0.05),而且明显促进根瘤的生长。无论是在干旱条件下或是在正常供水条件下,双接根瘤菌与摩西球囊霉处理对沙打旺生长及养分吸收的效应显著高于单接菌处理,植株地上部、地下部生物量以及N、P、K等吸收量均为最大。结果表明:AM真菌与根瘤菌双接种技术在干旱、半干旱区受损生态系统的植被恢复中具有一定的应用潜力。%A pot trial was conducted in greenhouse to investigate the effects of arbuscular mycorrhizal (AM ,Glomus mosseae) and Rhizobium on the growth and nutrition uptake of Astragalus adsurgens Pall .under water stress .There were four treatments ,including control (no inoculation) ,inoculation of Rhizobium ,inoculation of G .mosseae and dual inoc-ulation of Rhizobium and G .mosseae ,either in 35% or 65% of soil relative water content .The results showed that wa-ter stress significantly (P<0 .05) decreased the mycorrhizal infection of A .adsurgens ,while the inoculation of Rhizobi-um significantly ( P<0 .05) increased the infection regardless of water condition .The inoculation of G .mosseae not only significantly increased P uptake of A .adsurgens ,but also increased the growth of root nodules .Regardless of water con-dition ,the dual inoculation of G .mosseae and Rhizobium

  2. BDS/GPS/GLONASS/GALILEO 组合卫星导航系统仿真分析%Simulation and Analysis of BDS/GPS/GLONASS/GALILEO Integrated Satellite Navigation System

    Institute of Scientific and Technical Information of China (English)

    潜成胜; 马大喜

    2013-01-01

    全球卫星定位系统因其高精度、全天候等优点而被广泛应用,但是单一导航系统容易受环境及人为干扰,导致在区域精度和连续性上有较大问题。本文对组合导航系统进行仿真,组合中国BDS、美国GPS、俄罗斯GLONASS和欧盟的GALILEO四个全球卫星导航系统,利用仿真数据对目前GPS单一系统、当前不完整组合系统、未来完整组合系统在赣州地区的几何精度衰减因子( GDOP)值、可见卫星数及导航精度进行对比分析。通过仿真结果可以发现,与单一的GPS系统相比,组合系统在可见卫星数、GDOP和导航精度上都有非常大的优势。%The Global satellite Positioning System is applied widely because of its advantages of high accuracy and all-weather operation .However ,a single satellite positioning system is more susceptible to environmental and human dis-turbance ,which causes significant problems about precision and continuity in region .In this paper ,an integrated naviga-tion system which includes the Chinese BDS ,the U.S.GPS,the Russian GLONASS and the EU’s GALILEO was applied to be simulated .And the simulated data was used to compare the current single GPS system ,the current incomplete inte-grated system and the future complete integrated system ’ s GDOP,the number of visible satellites and navigation accuracy in Ganzhou area .The simulation results reveal that the integrated navigation system is more advantage than the single GPS system in GDOP ,the number of visible satellites and navigation accuracy .

  3. 基于双频伪距组合评估北斗广播电离层精度%Precision Assessment of Broadcast Ionospheric Model of BDS Based on Double-frequency Pseudo-range Combination

    Institute of Scientific and Technical Information of China (English)

    程娜; 贾小林

    2015-01-01

    Ionospheric delay is one major factor which affecting GNSS positioning,navigation,timing (PNT).In order to meet the needs of single-frequency users,the BDS provides the Klobuchar 8-parameters correction model in geographic coordi-nate system for ionospheric delay.In the monitoring and evaluation system,there are usually two methods to assess the broad-cast Ionospheric model,1)assessment by IGS precise ionospheric;2)assessment by dual-frequency pseudo-orange combina-tion.In this paper,the second method is used to assess the BDS’s broadcast ionosphericmodel.The results show that RMS and STD of broadcast ionospheric model are in 1.0 m,the relative precision is usually about 50%.%电离层时延误差是影响全球卫星导航系统定位、导航、授时精度的主要因素之一,为了满足单频用户的需求,我国北斗系统采用 Klobuchar 8参数模型进行电离层时延改正。在监测评估体系中,采用两种方法对电离层预报精度进行评估,1)全球卫星导航系统国际服务协会精密电离层模型评估;2)双频伪距组合评估。基于第二种方法对北斗系统的Klobuchar 模型进行了评估。评估结果显示,北斗系统广播电离层模型绝对精度包括均方根及标准差都在1.0 m 以内;相对精度 PER 一般为50%左右。

  4. Bd/s -> mu+ mu- in ATLAS

    CERN Document Server

    AUTHOR|(INSPIRE)INSPIRE-00215268; The ATLAS collaboration

    2016-01-01

    The ATLAS Experiment has conducted a search for the rare decays of Bs and Bd into mu+mu-. 25 fb−1 of integrated luminosity of proton-proton collisions collected during LHC Run 1 were studied and new results were obtained, as presented in this talk. An upper limit is set on the Bd to mu+mu- branching ratio of BR(Bd to mu+mu-) < 4.2×10−10 at 95% confidence level. For Bs, ATLAS measurement yields the branching ratio BR(Bs to mu+mu-)=(0.9+1.1−0.8)×10−9. The result is consistent with the Standard Model expectation and other available measurements.

  5. Bd/s -> mu+ mu- in ATLAS

    CERN Document Server

    Guenther, Jaroslav; The ATLAS collaboration

    2016-01-01

    The ATLAS Experiment has conducted a search for the rare decays of Bs and Bd into mu+mu-. 25 fb−1 of integrated luminosity of proton-proton collisions collected during LHC Run 1 were studied to provide new results presented in this talk. An upper limit is set on the branching ratio BR(Bd to mu+mu-) < 4.2×10−10 at 95% confidence level. For Bs, ATLAS measurement yields the branching ratio BR(Bs to mu+mu-)=(0.9+1.1−0.8)×10−9. The result is consistent with the Standard Model expectation and other available measurements.

  6. α-Glucosidase Inhibitory Activitives of S.xanthoxylon Bunge ,N.tangutorum Bobr and N.sibirica Pall, grown in Neimenggu from Zygophyllaceae%内蒙古产白刺、小果白刺和霸王α-葡萄糖苷酶抑制活性

    Institute of Scientific and Technical Information of China (English)

    常星; 康文艺

    2012-01-01

    首次利用体外α-葡萄糖苷酶抑制模型对内蒙古产3种蒺藜科植物的9个提取物进行活性评价,并与阳性对照Acarbose比较,发现3种植物均有抑制α-葡萄糖苷酶活性.其中白刺石油醚提取物对α-葡萄糖苷酶的抑制活性(IC50 =81.80 mg/L)最高,其余依次为小果白刺乙酸乙酯提取物(IC50=610.29 mg/L),霸王石油醚(IC50=627.22mg/L)和乙酸乙酯提取物(IC50 =838.40 mg/L),它们的抑制活性远大于阳性对照Acarbose( IC50=1103.01 mg/L).结果发现,不同植物不同溶剂提取物的α-葡萄糖苷酶抑制活性不同.同一植物不同溶剂提取物相比较,甲醇提取物的α-葡萄糖苷酶抑制活性不及乙酸乙酯和石油醚提取物.%The a-glucosidase inhibitory activities of nine extracts from three species of Zygophyllaceae in Neimenggu were evaluated in vitro by 96-microplate-based method for the first time. All these three species showed a-glucosidase inhibitory activities compared with the positive control " acarbose ". Among these nine extracts, petroleum ether extract of Nitraria tangutorum Bobr. Had the highest inhibitory activity (IC50 =81.80 mg/L) .followed by the ethyl acetate extract of N. Sibirica Pall( IC50 = 610.29 mg/L) ,the petroleum ether extract (IC50, = 627. 22 mg/L) and ethyl acetate extract (IC50 =838.40 mg/L) of Sarcozygium xanthoxylon Bunge,all of which are much higher than that of acarbose (IC50= 1103.01 mg/mL). Different extracts of different plants showed different inhibitory activies, while the inhibitory activity of different extracts from the same plant varied a lot. The methanolic extract had lower inhibitory activity than that of ethyl acetate extract and petroleum ether extract.

  7. Sotsiaaluuringud aitavad juhtida perepoliitikat / Kati Karelson, Katre Pall

    Index Scriptorium Estoniae

    Karelson, Kati

    2003-01-01

    Riiklikust perepoliitikast, selle tulemuste analüüs ja võrdlus teistes Euroopa riikides rakendatud institutsionaalsete meetmetega. Artikkel põhineb Euroopa Komisjoni 5. raamprogrammi projektina rahastatud ja aastail 2000-2003 korraldatud uuringu IPROSEC tulemustel. Skeemid. Tabel

  8. Shoot multiplication and plant regeneration in Caragana fruticosa (Pall.) Besser

    Institute of Scientific and Technical Information of China (English)

    ZHAI Xiao-jie; YANG Ling; SHEN Hai-long

    2011-01-01

    Different nutrient media can affectin vitro culturing protocols,and experimentation under varied growth conditions is valuable in plants where in vitro methods are in preliminary stages.We carried out the first in vitro propagation studies for the endangered species Caragana fruticosa (Fabaceae).We evaluated various nutrient media for their inpact on shoot elongation and axillary bud proliferation using different concentrations of 6-benzylaminopurine (BA) and α-naphthaleneacetic acid (NAA).Shoot elongation was evaluated based on adventitious shoot primary culture and subculture regeneration from Caragana seedlings.Our goal was to improve both micropropagation and regeneration in C.fruticosa.MS nutrient media was superior to 1/2MS macronutrients,DKW,QL,and WPM for shoot elongation and axillary shoot proliferation.Shoots grown on 1/2MS and WPM exhibited some chlorosis,and shoots on QL produced larger leavers than plants growing on normal medium.The shoot proliferation coefficient on MS media supplemented with 2.22 μM BA and 0.44 μM BA + 2.69 μM NAA was significantly higher than that with other treatments in the primary culture.Shoots on 2.22 μM BA showed a higher proliferation coefficient (3.17) than others in the subculture.Shoots were rooted on 1/2MS medium with the addition of different concentrations of NAA.The optimal concentration for rooting was 0.27 μM NAA (74%).Roots exhibited many stout and long root hairs.Survivl of established plantlets was 82% at 30 days after transfer to soil.Plants established in the green house showed normal growth and displayed no apparent morphological differences compared to stock plants.

  9. Accountability and transparency of financial sector supervision / Pall Gunnar Palsson

    Index Scriptorium Estoniae

    Palsson, Pall Gunnar

    2001-01-01

    Finantsjärelvalve üheks oluliseks tingimuseks on läbipaistvus. Rahvusvahelise Valuutafondi poolt vastu võetud raha- ja rahanduspoliitika heade tavade koodeksist. Ülevaade Islandi finantsinspektsiooni töökorraldusest

  10. Pall oma väravasse? / Heidi Pruuli

    Index Scriptorium Estoniae

    Pruuli, Heidi, 1954-

    2008-01-01

    ETV peatoimetaja arvates näitavad nii Riigikogu kui ka valitsus rahvusringhäälingu vastu üles ükskõiksust ja tõrjuvust ning ta viitab litsentsimaksu kaotamisele, samal ajal kui rahvusringhäälingu tänavusi eelarvetoetusi vähendati 37 mln. krooni võrra

  11. ЦВЕТЕНИЕ И ПЛОДОНОШЕНИЕ РАСТЕНИЙ GENTIANA SCABRA BUNGE И G. TRIFLORA PALL. НА ЮГЕ ПРИМОРСКОГО КРАЯ РОССИИ

    OpenAIRE

    Янь, Чжиюань; Сунь, Янь; Царенко, Н.

    2009-01-01

    Изложены результаты наблюдений за цветением и плодоношением двух видов горечавок (Gentiana scabra Bunge и G. triflora Pall.) на юге Приморского края. Установлено, что основными насекомыми-опылителями являются шмели. Выявлены оптимальные сроки для проведения работ по гибридизации. Отмечено, что при выращивании растений в культуре не нарушаются сроки прохождения основных фенологических фаз....

  12. BDS Thin Film UV Antireflection Laser Damage Competition

    Energy Technology Data Exchange (ETDEWEB)

    Stolz, C J

    2010-10-26

    UV antireflection coatings are a challenging coating for high power laser applications as exemplified by the use of uncoated Brewster's windows in laser cavities. In order to understand the current laser resistance of UV AR coatings in the industrial and university sectors, a double blind laser damage competition was performed. The coatings have a maximum reflectance of 0.5% at 355 nm at normal incidence. Damage testing will be performed using the raster scan method with a 7.5 ns pulse length on a single testing facility to facilitate direct comparisons. In addition to the laser resistance results, details of deposition processes and coating materials will also be shared.

  13. Summary of the BDS and MDI CLIC08 Working Group

    CERN Document Server

    Tomás, R; Ahmed, I; Ambatu, PK; Angal-Kalinin, D; Barlow, R; Baud, J P; Bolzon, B; Braun, H; Burkhardt, H; Burt, GC; Corsini, R; Dalena, B; Dexter, AC; Dolgashev, V; Elsener, K; Fernandez Hernando, JL; Gaillard, G; Geffroy, N; Jackson, F; Jeremie, A; Jones, RM; McIntosh, P; Moffeit, K; Peltier, F; Resta-López, J; Rumolo, G; Schulte, D; Seryi, A; Toader, A; Zimmermann, F

    2008-01-01

    This note summarizes the presentations held within the Beam Delivery System and Machine Detector Interface working group of the CLIC08 workshop. The written contributions have been provided by the presenters on a voluntary basis.

  14. The introduction of digital dental technology into BDS curricula.

    Science.gov (United States)

    Chatham, C; Spencer, M H; Wood, D J; Johnson, A

    2014-12-05

    The aim of this study was to determine the degree to which digital dental technologies have been introduced into the curricula of UK dental schools. A survey was carried out of all the UK dental schools that teach undergraduate dental students. The survey contained six questions and was designed to determine if digital dental technology techniques or systems were being taught in the curricula, what these techniques were, and whether the school dental laboratories supported these techniques. Sixteen schools were surveyed and 11 replied: a response rate of 69%. Forty-five percent of the schools that replied did not teach digital dental technology in their curriculum. Of the 55% of schools who did teach digital dental technology, 50% gave lectures or demonstrations while the other 50% allowed practical involvement by the student. Two thirds of these stated that not all the students participated in practical usage. Seventy-three percent of the schools that replied had dental laboratories using some, but not all the digital dental technology techniques listed. Eighty percent of the schools that were not teaching digital dental technology said it was because it was not included in the curriculum, and 20% stated it was due to a lack of technical expertise or support.

  15. Harman kardon(哈曼卡顿)BDS

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    Harmankardon(哈曼卡顿)集团推出BDS系列蓝光家庭影院娱乐系统,BDS系统集成了通用蓝光播放器,能清晰、高保真地重现电影与音乐播放效果,还可以配合Bridge IIIP扩展底座播放iPod与iPhone的内容。

  16. ЧИСЛО ХРОМОСОМ И ГИБРИДИЗАЦИЯ ГОРЕЧАВКИ ШЕРОХОВАТОЙ (GENTIANA SCABRA BUNGE) И ГОРЕЧАВКИ ТРЕХЦВЕТКОВОЙ (GENTIANA TRIFLORA PALL.) НА ЮГЕ ПРИМОРСКОГО КРАЯ РОССИИ

    OpenAIRE

    ЛИЦЗЕ ЮЙ; СИНЬСИНЬ ЛИ; ЯНЬ СУНЬ

    2016-01-01

    Изучены числа хромосом и проведены эксперименты по искусственной гибридизации лекарственных растений Gentiana scabra Bunge и G. triflora Pall., широко используемых в Китае. На обширном материале показано, что оба вида характеризуются одним и тем же числом хромосом (2n=26), что может способ-ствовать успешной гибридизации этих видов. Для G. triflora число хромосом установлено впервые. В условиях культуры были получены гибриды этих видов и проанализирована их фертильность. Установлено, что в вар...

  17. Effect of Lanthanum on Methanol Fuel Exhaust Deep Oxidation over Pall adium Catalyst

    Institute of Scientific and Technical Information of China (English)

    王幸宜; 万颖; 卢冠忠

    2003-01-01

    The performance of deep oxidation of methanol on supported Pd catalyst was examined by a chromatograph-micro-reactor. The results show that the addition of La into γ-Al2O3 support can affect greatly the performance of the Pd catalyst. In the absence of CO, La can decrease the content of oxygen-containing intermediate, although La can not lower the light-off temperature of methanol oxidation. In the presence of CO, La can lower the light-off temperature, decrease the amount of CO adsorption, and weaken evidently "CO inhibition" to the oxidation of methanol. By XPS technique, it is shown that La modifies the electronic structure of Pd, which attributes to the modifications of the catalytic performance.

  18. Preventing microbial growth on pall-rings when upgrading biogas using absorption with water wash

    Energy Technology Data Exchange (ETDEWEB)

    Haakansson, Anna

    2006-07-15

    For produced biogas to be usable as vehicle fuel it has to be upgraded to a higher energy content. This is accomplished by elevation of the methane concentration through removal of carbon dioxide. Absorption with water wash is the most common upgrading method used in Sweden today. The upgrading technique is based on the fact that carbon dioxide is more soluble in water than methane. Upgrading plants that utilises this method have problems with microbial growth in the system. This growth eventually leads to a stop in operation due to the gradually drop in upgrading capacity. The aim of this thesis were to evaluate the possibility to through some kind of water treatment maintain an acceptable level of growth or altogether prevent it in order to maintain an acceptable process capacity and thereby avoid the need to clean. Through collection of literature the implementation possibilities were evaluated with regard to efficiency, economic sustainability and if there would be a release of any harmful substances. In order to prevent the microbial growth in the columns the treatment should either focus on removing microorganisms or limit the accessible nutrients. For the single pass system it is concluded that the treatment should reduce the biofilm formation and be employed in an intermittent way. Among the evaluated treatments focusing on the reduction of microorganisms the addition of peracetic acid seems to be the most promising one. For the regenerating system the treatment method could focus on either one. As for the single pass system peracetic acid could be added to reduce the amount of microorganism. To reduce the amount of organic matter an advanced oxidation process could be deployed with the advantage that it also could remove the microorganisms.

  19. Wexler's Great Smoke Pall: a chemistry-climate model analysis of a singularly large emissions pulse

    Science.gov (United States)

    Field, R. D.; Voulgarakis, A.

    2011-12-01

    We model the effects of the smoke plume from what was arguably the largest forest fire in recorded history. The Chinchaga fire burned continuously during the summer of 1950 in northwestern Canada during a very dry fire season. On September 22nd, the fire made a major advance, burning an area of approximately 1400 km2. Ground and aircraft observations showed that from September 22 to 28, the smoke plume from the emissions pulse travelled over northern Canada, southward over the Great Lakes region and eastern US, across the Atlantic, and to Western Europe. Over the Great Lakes region, the plume remained thick enough to create twilight conditions in the mid-afternoon, and was estimated to have caused a 4 oC cooling at the surface. While many instances of long-range transport of wildfire emissions have been detected over the past decade, we know of no other wildfire which created such an acute effect on downward shortwave radiation at such a long distance. As a result, the fire was an important analogue event used in estimating the effects of a nuclear winter. Simulations with the nudged version of the GISS chemistry-climate model accurately capture the long-range transport pattern of the smoke emissions in the free-troposphere. The timing and location of aircraft observations of the plume over the eastern US, North Atlantic and the United Kingdom were well-matched to modeled anomalies of CO and aerosol optical depth. Further work will examine the model's ability to create twilight conditions during the day, and to provide an estimate of the consequent cooling effects at the surface from this remarkable emissions pulse.

  20. Phenolic Compounds from Halimodendron halodendron (Pall. Voss and Their Antimicrobial and Antioxidant Activities

    Directory of Open Access Journals (Sweden)

    Jihua Wang

    2012-09-01

    Full Text Available Halimodendron halodendron has been used as forage in northwestern China for a long time. Its young leaves and flowers are edible and favored by indigenous people. In this study, eleven phenolic compounds were bioassay-guided and isolated from the aerial parts of H. halodendron for the first time. They were identified by means of physicochemical and spectrometric analysis as quercetin (1, 3,5,7,8,4'-pentahydroxy-3'-methoxy flavone (2, 3-O-methylquercetin (3, 3,3'-di-O-methylquercetin (4, 3,3'-di-O-methylquercetin-7-O-β-D-glucopyranoside (5, isorhamentin-3-O-β-D-rutinoside (6, 8-O-methylretusin (7, 8-O-methylretusin-7-O-β-D-glucopyranoside (8, salicylic acid (9, p-hydroxybenzoic acid (ferulic acid (10, and 4-hydroxy-3-methoxy cinnamic acid (11. They were sorted as flavonols (1–6, soflavones (7 and 8, and phenolic acids (9–11. Among the compounds, flanools 1–4 revealed a strong antibacterial activity with minimum inhibitory concentration (MIC values of 50–150 μg/mL, and median inhibitory concentration (IC50 values of 26.8–125.1 μg/mL. The two isoflavones (7 and 8 showed moderate inhibitory activity on the test bacteria. Three phenolic acids (9, 10 and 11 showed strong antibacterial activity with IC50 values of 28.1–149.7 μg/mL. Antifungal activities of the compounds were similar to their antibacterial activities. All these phenolic compounds showed significant antimicrobial activity with a broad spectrum as well as antioxidant activity based on 1,1-diphenyl-2-picrylhydrazyl (DPPH radical scavenging and β-carotene-linoleic acid bleaching assays. In general, the flavonol aglycones with relatively low polarity exhibited stronger activities than the glycosides. The results suggest the potential of this plant as a source of functional food ingredients and provide support data for its utilization as forage as well.

  1. Analysis of Codon Usage Patterns in Herbaceous Peony (Paeonia lactiflora Pall. Based on Transcriptome Data

    Directory of Open Access Journals (Sweden)

    Yanqing Wu

    2015-10-01

    Full Text Available Codon usage bias, which exists in many genomes, is mainly determined by mutation and selection. To elucidate the genetic features and evolutionary history of herbaceous peony (Paeonia lactiflora, a well-known symbol of prosperity in China, we examined synonymous codon usage in 24,216 reconstructed genes from the P. lactiflora transcriptome. The mean GC content was 44.4%, indicating that the nucleotide content of P. lactiflora genes is slightly AT rich and GC poor. The P. lactiflora genome has a wide range of GC3 (GC content at the third synonymous codon position distribution, with a significant correlation between GC12 and GC3. ENC (effective number of codons analysis suggested that mutational bias played a major role in shaping codon usage. Parity Rule 2 (PR2 analysis revealed that GC and AU were not used proportionally. We identified 22 “optimal codons”, most ending with an A or U. Our results suggested that nucleotide composition mutation bias and translational selection were the main driving factors of codon usage bias in P. lactiflora. These results lay the foundation for exploring the evolutionary mechanisms and heterologous expression of functionally-important proteins in P. lactiflora.

  2. [Genotypic Diversity of Wolbachia pipientis in Native and Invasive Harmonia axyridis Pall., 1773 (Coleoptera, Coccinellidae) Populations].

    Science.gov (United States)

    Goryacheva, I I; Blekhman, A V; Andrianov, B V; Gorelova, T V; Zakharov, I A

    2015-08-01

    The distribution and variability of reproductive symbiotic Wolbachia pipientis bacteria were studied in seven native and six invasive H. axyridis populations. Wolbachia-infected individuals were found in two invasive and two native populations. We demonstrated for the first time an infection of invasive H. axyridis populations with Wolbachia. Two new molecular forms of Wolbachia were detected by a system of multilocus typing. The supergroup A Wolbachia was found for the first time in H. axyridis. The detected genotypic diversity of Wolbachia indicates repeated and independent infection events in the evolutionary past of H. axyridis.

  3. Распознавание цветных шумов в псевдофазовом пространстве с использованием BDS статистики

    OpenAIRE

    Васюта, Константин Станиславович

    2009-01-01

    Показан алгоритм вычисления BDS статистики, в основе которой лежит вычисление корреляционного интеграла. Алгоритм основан на статистической значимости корреляционной размерности процесса, вложенного в псевдофазовое пространство заданной размерности. Впервые предложен численный метод классификации случайных процессов по их «цвету» с использованием статистических свойств BDS статистики....

  4. Evaluation of the Effects of Sativex (THC BDS: CBD BDS) on Inhibition of Spasticity in a Chronic Relapsing Experimental Allergic Autoimmune Encephalomyelitis: A Model of Multiple Sclerosis.

    Science.gov (United States)

    Hilliard, A; Stott, C; Wright, S; Guy, G; Pryce, G; Al-Izki, S; Bolton, C; Giovannoni, G

    2012-01-01

    This study investigated the antispasticity potential of Sativex in mice. Chronic relapsing experimental allergic encephalomyelitis was induced in adult ABH mice resulting in hind limb spasticity development. Vehicle, Sativex, and baclofen (as a positive control) were injected intravenously and the "stiffness" of limbs assessed by the resistance force against hind limb flexion. Vehicle alone caused no significant change in spasticity. Baclofen (5 mg/kg) induced approximately a 40% peak reduction in spasticity. Sativex dose dependently reduced spasticity; 5 mg/kg THC + 5 mg/kg CBD induced approximately a 20% peak reduction; 10 mg/kg THC + 10 mg/kg CBD produced approximately a 40% peak reduction in spasticity. Sativex has the potential to reduce spasticity in an experimental mouse model of multiple sclerosis (MS). Baclofen reduced spasticity and served as a positive control. Sativex (10 mg/kg) was just as effective as baclofen, providing supportive evidence for Sativex use in the treatment of spasticity in MS.

  5. Effect of Calcium Sprays on Mechanical Strength and Cell Wall Fractions of Herbaceous Peony (Paeonia Lactiflora Pall. Inflorescence Stems

    Directory of Open Access Journals (Sweden)

    Jintao Ge

    2012-04-01

    Full Text Available Calcium is an essential element and imparts significant structural rigidity to the plant cell walls, which provide the main mechanical support to the entire plant. In order to increase the mechanical strength of the inflorescence stems of herbaceous peony, the stems are treated with calcium chloride. The results shows that preharvest sprays with 4% (w/v calcium chloride three times after bud emergence are the best at strengthening “Da Fugui” peonies’ stems. Calcium sprays increased the concentrations of endogenous calcium, total pectin content as well as cell wall fractions in herbaceous peonies stems, and significantly increased the contents of them in the top segment. Correlation analysis showed that the breaking force of the top segment of peonies’ stems was positively correlated with the ratio of water insoluble pectin to water soluble pectin (R = 0.673 as well as lignin contents (R = 0.926 after calcium applications.

  6. Prevention and Control of Gentiana macrophylla Pall Root Rot Disease%秦艽根腐病的防治

    Institute of Scientific and Technical Information of China (English)

    程远辉; 侯志江; 徐中志

    2014-01-01

    The root rot is a major disease affecting yield of Gentiana macrophyl a pal , reducing yield or even causing total crop failure. This research introduced the occurrence characteristics and various control techniques of root rot of Gentiana macrophyl a pal , in order to provide references for farmers.%根腐病是影响秦艽产量的最主要病害,发病后会造成秦艽严重减产甚至绝收。笔者总结了秦艽根腐病的发生特点及各种防治技术,以期为广大药农提供指导。

  7. ADST Cold Start Procedures for the BDS-D M1/XROD 1.1.0

    Science.gov (United States)

    1993-08-20

    describes the user’s ability to regenerate a GT- Il1 computer GTOS4.7 operating system and load the MI/XROD application software. Us rocede com"s of...memory ma for the TX BAckead (Subsyem 0) md a minimum of 2MB of active m__m_ Y am for theT backead Cusys ).SWION EPO CMC Ethmc cwd (fcliums a

  8. On the ABJM four-point amplitude at three loops and BDS exponentiation

    Science.gov (United States)

    Bianchi, Marco S.; Leoni, Matias

    2014-11-01

    We study the three-loop four-point amplitude in ABJM theory. We determine the dual conformal invariant integrals with highest number of propagators and fix their coefficients by two-particle cuts. Evaluating such a combination of integrals in dimensional regularization we provide evidence for exponentiation of the amplitude, including the finite terms. In addition we show that the three-loop amplitude can be expressed in terms of classical polylogarithms of uniform degree of transcendentality.

  9. On the ABJM four-point amplitude at three loops and BDS exponentiation

    CERN Document Server

    Bianchi, Marco S

    2014-01-01

    We study the three-loop four-point amplitude in ABJM theory. We determine the dual conformal invariant integrals with highest number of propagators and fix their coefficients by two-particle cuts. Evaluating such a combination of integrals in dimensional regularization we provide evidence for exponentiation of the amplitude, including the finite terms. In addition we show that the three-loop amplitude can be expressed in terms of classical polylogarithms of uniform degree of transcendentality.

  10. Taking Academic Freedom Seriously: Exploring the Legal and Moral Underpinnings of BDS

    NARCIS (Netherlands)

    J.D. Handmaker (Jeff)

    2015-01-01

    textabstractThe call for a cultural and academic boycott of Israel that was launched by Palestinian civil society in 2004 represents a decisive turning point in the long-time Palestinian struggle for social justice and academic freedom and the broader struggle for Palestinian self-determination. Alo

  11. Being Dementia Smart (BDS): A Dementia Nurse Education Journey in Scotland.

    Science.gov (United States)

    Macaden, Leah

    2016-06-24

    There is a global demographic transition secondary to population ageing. The number of older people living with multimorbidities including dementia has been significantly rising both in developed and developing countries. It is estimated that there would be 74.7 million people living with dementia by 2030 that would escalate to 135.46 million by 2050. 62 % of people with dementia currently live in low and middle income countries that are very poorly resourced to cope with this epidemic. Dementia is now duly recognised as a national priority within the UK and a global priority at the 2013 G8 Summit. Management and care of an individual with dementia requires a multidisciplinary approach with expertise and a competent skill base. Nurses are central to the delivery of dementia care delivery in hospitals, community and residential care settings. It is against this background that this pre-registration integrated dementia curriculum was developed to build capacity and capability with dementia expertise among the future nursing workforce in Scotland in line with the National Dementia Strategy.

  12. Penguin contributions to CP phases in $B_{d,s}$ decays to charmonium

    CERN Document Server

    Frings, Philipp; Wiebusch, Martin

    2015-01-01

    The precision of the CP phases $2\\beta$ and $2\\beta_s$ determined from the mixing-induced CP asymmetries in $B_d\\to J/\\psi K_S$ and $B_s\\to J/\\psi \\phi$, respectively, is limited by the unknown long-distance contribution of a penguin diagram involving up quarks. We analyze the infrared QCD structure of this contribution and find that all soft and collinear divergences either cancel between different diagrams or factorize into matrix elements of local four-quark operators up to terms suppressed by $\\Lambda_{QCD}/m_{\\psi}$, where $m_{\\psi}$ denotes the $J/\\psi$ mass. Our results allow us to calculate the penguin-to-tree ratio $P/T$ in terms of the matrix elements of these operators and to constrain the penguin contribution to the phase $2\\beta$ as $|\\Delta \\phi_d|\\leq {0.68}^\\circ$. The penguin contribution to $2\\beta_s$ is bounded as $|\\Delta \\phi_s^{0}|\\leq {1.03}^\\circ$, $|\\Delta \\phi_s^{\\parallel}|\\leq {1.28}^\\circ$, and $|\\Delta \\phi_s^{\\perp}|\\leq {0.95}^\\circ$ for the case of longitudinal, parallel, and ...

  13. Z-mediated charge and CP asymmetries and FCNCs in $B_{d,s}$ processes

    CERN Document Server

    Chen, Chuan-Hung; Wang, Wei

    2010-01-01

    We show model-independently that the upper bound for the negative like-sign charge asymmetry $(-A^b_{s\\ell})$ is $ (3.16_{-0.48}^{+0.49})\\times 10^{-3}$ when the constraints from the $B_q-\\bar B_q$ mixings and the time-dependent CP asymmetries (CPAs) for $B_q\\to J/\\Psi M_q$ with $M_q=K,\\phi$ and $q=d,s$ are taken into account. Although the upper bound is smaller than the measured value by the D{\\O} Collaboration at Fermilab, it is still one order of magnitude larger than the standard model (SM) prediction and sensitive to new CP violating effects. To illustrate the potential large $|A^{b}_{s\\ell}|$, we show the influence of new $SU(2)_L$ singlet exotic quarks in the vector-like quark model, where the $Z$-mediated flavor changing neutral currents (FCNCs) are generated at tree level. In particular, we demonstrate that (a) the like-sign charge asymmetry could be enhanced by a factor of two in magnitude; (b) the CPA of $\\sin2\\beta^{J/\\Psi \\phi}_s$ could reach to $-15\\%$; (c) the CPA of $\\sin2\\beta_{\\phi K_S}$ cou...

  14. Harman/Kardon哈曼 BDS 800/600/400蓝光家庭影院系统

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    外观时尚,功能多样,简单易操作——Harman/Kardon BDS系列蓝光家庭影院系统就是最多家庭梦寐以求的娱乐系统,而此系统设计筒约时尚,轻松匹配各式家居环境。

  15. A lane-level LBS system for vehicle network with high-precision BDS/GPS positioning.

    Science.gov (United States)

    Guo, Chi; Guo, Wenfei; Cao, Guangyi; Dong, Hongbo

    2015-01-01

    In recent years, research on vehicle network location service has begun to focus on its intelligence and precision. The accuracy of space-time information has become a core factor for vehicle network systems in a mobile environment. However, difficulties persist in vehicle satellite positioning since deficiencies in the provision of high-quality space-time references greatly limit the development and application of vehicle networks. In this paper, we propose a high-precision-based vehicle network location service to solve this problem. The major components of this study include the following: (1) application of wide-area precise positioning technology to the vehicle network system. An adaptive correction message broadcast protocol is designed to satisfy the requirements for large-scale target precise positioning in the mobile Internet environment; (2) development of a concurrence service system with a flexible virtual expansion architecture to guarantee reliable data interaction between vehicles and the background; (3) verification of the positioning precision and service quality in the urban environment. Based on this high-precision positioning service platform, a lane-level location service is designed to solve a typical traffic safety problem.

  16. Geoffrey Layton Slack OBE (Mil), CBE, TD, BDS DDS, FDSRCS, FDS Glas, FFDRCSI, Dip Bact (1912-1991).

    Science.gov (United States)

    Gelbier, Stanley

    2014-02-01

    It is with some pride that the author worked in Geoffrey Slack's department from 1963 to 1967 and even retained a working relationship with him after that time. Slack was Professor of Dental Surgery (1959-1976) and later Professor of Community Dental Health (1976-1977) at The London Hospital Medical College, within the University of London. The change in titles came about as a result of recognition of his contribution to developments in public health and community dental care and services, for many of which he was directly responsible. He was Dental Dean from 1965 until 1969. Upon retirement in 1977 he became Emeritus Professor. In addition, he was Dean of the Faculty of Dental Surgery at the Royal College of Surgeons of England from 1974 to 1977.

  17. Muusikamaailm : CPE Bachi käsikirjad tagasi Saksamaale. Täna uusooper Londonis. Theodorakise ooperid plaadil. David Golub lahkunud. Preemia Palle Mikkelborgile / Priit Kuusk

    Index Scriptorium Estoniae

    Kuusk, Priit, 1938-

    2001-01-01

    Ukraina nõustus tagastama Saksamaale C.P.E. Bachi muusikakäsikirjad, mis Nõukogude Liidu armee sealt II Maailmasõja ajal ära viis. Inglise Rahvusooperis lavastuvast D.Saweri ooperist "From Morning to Midnight". M.Theodorakise kolm ooperit (antiiktriloogia "Elektra", "Antigone" ja "Medeia") ilmusid seoses maestro 75. juubeliga kaheksal CD-plaadil. Lühidalt D.Golubist. Põhjamaade Nõukogu tänavuse muusikapreemia võitis P.Mikkelborg

  18. A study on the NMR spectrum of monoterpene glucosides from Paeonia lactiflora Pall.%芍药单萜苷的NMR谱学研究

    Institute of Scientific and Technical Information of China (English)

    张晓燕; 王金辉; 李铣

    2001-01-01

    A study on the NMR spectral character of paeoniflorin, amonoterpene glucoside, was carried out and its proton signals of 1H-NMR were completely assigned by means of HMQC、HMBC、1H-1H COSY and ROSEY for the first time.%利用HMBC,HMQC,1H-1HCOSY,ROSEY等核磁技术第一次完整地确定了芍药苷中碳氢信号的归属。

  19. 尼龙11/POE共混物的形态与力学性能%The Morphology and Mechanical Properties of PAll/POE Blends

    Institute of Scientific and Technical Information of China (English)

    郭云霞; 胡国胜; 李迎春; 杨云峰; 王志强

    2012-01-01

    采用动态力学分析(DMTA)和扫描电镜(SEM)等方法研究了相容剂乙烯辛烯共聚物接枝马来酸酐聚合物(POE-g-MAH)对尼龙11(PA11)共混体系力学性能及共混物形态的影响。结果表明,混合弹性体中m(POE-g-MAH)/m(POE)=2∶1时,PA11共混物的缺口冲击强度达到81.2 kJ/m^2;共混物缺口冲击强度对MAH接枝率敏感;加入混合弹性体,共混体系分子间的作用力增大,损耗峰向高温方向移动,Tg升高;PA11与POE各个共混体系的β松弛峰高显著低于纯PA11的,加入POE和POE-g-MAH可有效降低PA11的吸水性;POE-g-MAH可显著改善PA11/POE共混材料的相容性,使分散相尺寸减小,分布均匀,且材料缺口冲击强度显著增大。%The effect of maleic anhydride grafted polyolefin elastomer(POE-g-MAH) as compatilizer on the mechanical properties and morphology of polyamide 11(PA11)/POE blends was investigated using dynamic mechanical analysis(DMTA) and scanning electron microscope(SEM).The results show that when the ratio of POE-g-MAH and POE in mixed elastomer is 2:1,the notched impact strength of PA11 blends reaches 81.2 kJ/m2.The notched impact strength of blends is sensitive to MAH grafted rate.When mixed elastomer is added into PA11,the intermolecular forces of blends system increase and the loss peaks move to the high temperature which results in higher Tg.The β relaxation peak of each blends of PA11 and POE is significantly lower than that of pure PA11,which illustrates that POE and POE-g-MAH can effectively reduce water absorptivity of PA11.POE-g-MAH can improve the miscibility between PA11 and POE,decrease the particle size of dispersion phase and obviously increase the notched impact strength of these blends.

  20. Técnicas inalatórias: workshop

    OpenAIRE

    Dias, Hermínia Brites

    2011-01-01

    Objectivos: caracterizar os principais dispositivos de administração dos BDs inalados; caracterizar o procedimento da administração dos BDs inalados de acordo com o dispositivo utilizado; caracterizar as respostas funcionais aos BDs.

  1. Smart Device-Supported BDS/GNSS Real-Time Kinematic Positioning for Sub-Meter-Level Accuracy in Urban Location-Based Services

    OpenAIRE

    Wang, Liang; LI Zishen; Zhao, Jiaojiao; Zhou, Kai; Wang, Zhiyu; Yuan, Hong

    2016-01-01

    Using mobile smart devices to provide urban location-based services (LBS) with sub-meter-level accuracy (around 0.5 m) is a major application field for future global navigation satellite system (GNSS) development. Real-time kinematic (RTK) positioning, which is a widely used GNSS-based positioning approach, can improve the accuracy from about 10–20 m (achieved by the standard positioning services) to about 3–5 cm based on the geodetic receivers. In using the smart devices to achieve positioni...

  2. 基于Allan方差的BDS随机误差分析%Stochastic Errors Analysis of BDS Based on Allan Variance

    Institute of Scientific and Technical Information of China (English)

    刘乾坤; 隋立芬; 陈泉余; 王凌轩

    2016-01-01

    BDS观测数据噪声的辨识对提高BDS定位精度具有非常重要的意义,大量研究表明GPS非差随机模型并不服从高斯白噪声分布,北斗系统由于其星座和频率的多样性,噪声特征将明显不同于GPS.本文利用iGMAS大量高频实测数据,通过Allan方差分析,对比研究了BDS的噪声成分与其参数.试验结果表明,BDS非差噪声成分与GPS相同,主要为白噪声与一阶马尔科夫过程噪声.但是具体参数不同.BDS相位白噪声为2.50 mm,大于GPS的2.33 mm;GM过程噪声为2.38 mm·s-1/2,小于GPS的4.43 mm·s-1/2,相关时间为77.07 s,大于GPS的55.51s.大量试验数据表明BDS的噪声参数聚集程度大于GPS,对环境的敏感程度低,噪声相关时间更长,过程噪声更小,这在北斗精密定位中还有待精化.

  3. GPS/BDS组合姿态测量及精度分析%Combined GPS/BDS Attitude Determination and Accuracy Analysis

    Institute of Scientific and Technical Information of China (English)

    王珍; 丁乐乐; 黄恩兴; 马强

    2015-01-01

    给出了GPS/BDS组合双差观测模型和姿态测量解算算法,采用Kalman滤波进行动态基线解算的参数估计,利用LAMBDA方法固定双系统模糊度,获得动态基线固定解,最后通过基线的坐标系转换获得姿态角。比较了单系统和GPS/BDS双系统静态姿态角与动态短基线解算结果。试验结果表明,GPS/BDS组合姿态测量的精度和可靠性较GPS单系统都有显著提高。

  4. BDS用户设备的电磁兼容现状及进展%Status and Progress of EMC of BDS User Equipment

    Institute of Scientific and Technical Information of China (English)

    李琳; 谭述森

    2015-01-01

    针对BDS用户设备与其邻频系统的电磁兼容问题,提出BDS用户设备电磁敏感度优化和BDS业务保护相结合的解决途径.针对内部诱因要素——BDS用户设备电磁敏感,设计合理可行的电磁敏感度优化方案,尽可能优化BDS用户设备电磁敏感度;针对外部诱因要素——邻频系统电磁辐射,制定贴切直观的BDS业务保护要求,给予BDS用户设备具备规范性效力的基本保护.BDS用户设备电磁敏感度的显著优化以及BDS业务保护要求的付诸实施,可较彻底解决BDS用户设备的电磁兼容问题.

  5. Research on Single-Epoch and Single-Frequency GLONASS/BDS RTK Positioning%GLONASS/BDS单历元单频RTK定位研究

    Institute of Scientific and Technical Information of China (English)

    谢建涛; 郝金明; 林文贵; 于合理; 田英国

    2015-01-01

    天空中导航卫星的可见数不断增加对整周模糊度的解算带来了有利的影响,极大改善了GNSS单历元单频RTK定位的精度和可靠性.针对GLONASS/BDS组合定位时的时空基准统一问题进行了分析;并针对GLONASS信号频分多址的特点,对GLONASS/BDS单历元单频RTK定位的数学模型进行了研究;最后通过实测数据对模型可行性进行了验证.结果表明,GLONASS/BDS单历元单频RTK定位是可行的,并且在北向上的定位精度要优于BDS单历元双频RTK定位.

  6. GPS/BDS静态基线处理方法及其结果分析%GPS/BDS Static Baseline Processing Method and Result Analysis

    Institute of Scientific and Technical Information of China (English)

    王霞迎; 秘金钟

    2013-01-01

    由于GPS和BDS存在差异,其数据处理方法也有所不同.本文详细叙述了两系统在时空基准方面的不同及GPS、BDS、GPS/BDS联合载波相位差分的数学模型,编写程序处理实测数据,得出3种组合的精度均在毫米级,在BDS卫星个数较少的情况下,其定位精度仅有3mm~4mm的差别,GPS/BDS双系统改善了BDS单系统的定位精度.

  7. 变结构违约相关的BDS定价模型%BDS Pricing Model with Variable Structure of Default Correlation

    Institute of Scientific and Technical Information of China (English)

    刘向华; 肖雪平

    2014-01-01

    次贷危机爆发后CDS的定价和风险监控成为研究热点.BDS是具有多个参考资产的CDS,其最重要的问题是定义参考资产之间的违约相关性.利用Copula函数描述资产之间的相关结构具有较好的特点.提出运用变结构的Copula函数来描述违约相关性的BDS定价模型,考虑到经济形势转换对BDS定价的影响,对违约密度和违约相关性引入马尔科夫转换机制,并运用蒙特卡洛模拟进行比较分析.研究表明,变结构违约相关的BDS价格处于不带机制转换两个初始状态的BDS价格的中间.由于BDS价格与违约密度正向变动而与违约相关性反向变动,因此经济形势转换对BDS定价的影响实际上是违约密度和违约相关性综合作用的结果.

  8. Evaluation of tooth preparations for Class II cavities using magnification loupes among dental interns and final year BDS students in preclinical laboratory

    Directory of Open Access Journals (Sweden)

    Khyati Narula

    2015-01-01

    Conclusions: Magnifying loupes help the dental students to have better vision, thus improved dexterity with hands while preparing the tooth for restoration. However, dental students have to get adapted to the loupes for the ease of using loupes. Using loupes frequently may help them to get adapted to the loupes.

  9. A model-independent analysis of final-state interactions in \\bar B_{d/s}^0 --> J/psi pi pi

    CERN Document Server

    Daub, J T; Kubis, B

    2015-01-01

    Exploiting $B$-meson decays for Standard Model tests and beyond requires a precise understanding of the strong final-state interactions that can be provided model-independently by means of dispersion theory. This formalism allows one to deduce the universal pion-pion final-state interactions from the accurately known $\\pi\\pi$ phase shifts and, in the scalar sector, a coupled-channel treatment with the kaon-antikaon system. In this work an analysis of the decays $\\bar B_d^0 \\to J/\\psi \\pi^+\\pi^-$ and $\\bar B_s^0 \\to J/\\psi \\pi^+\\pi^-$ is presented. We find very good agreement with the data up to 1.05 GeV with a number of parameters reduced significantly compared to a phenomenological analysis. In addition, the phases of the amplitudes are correct by construction, a crucial feature when it comes to studies of $CP$ violation in heavy-meson decays.

  10. 77 FR 18270 - Acceptance Decision for the Unrestricted Use of the Former Michigan Chemical Company-Breckenridge...

    Science.gov (United States)

    2012-03-27

    ... Former Michigan Chemical Company (MCC), Breckenridge Disposal Site (BDS) (also known as NWI Breckenridge... radioactive filter cake was buried at the BDS. Burial of the filter cake at the BDS was permitted under AEC... terminated the license in 1971, concluding that the BDS was suitable for unrestricted use. Several...

  11. 75 FR 29371 - Self-Regulatory Organizations; The NASDAQ Stock Market LLC; Notice of Filing of a Proposed Rule...

    Science.gov (United States)

    2010-05-25

    ...-regulatory organization (``SRO'') markets, as well as broker-dealers (``BDs'') and aggregators such as the... attract internalized transaction reports. It is common for BDs to further and exploit this competition by... or BDs to produce jointly proprietary data products. Additionally, non-BDs such as order routers...

  12. Full sun-spay-cutting method of Rosa Davurica Pall ' twig cutting%全光雾喷法在刺玫果嫩枝扦插上的应用

    Institute of Scientific and Technical Information of China (English)

    周军方; 段进潮; 徐岩; 任跃英; 王远亮; 肖兴利; 王秀萍

    2011-01-01

    全光雾喷法扦插育苗是近几年应用较多的快速育苗技术,它具有生根快、繁殖率高的特点,是快速繁殖优良品种苗木的一条重要途径。笔者对刺玫果分别用普通扦插和全光雾喷法进行夏季嫩枝扦插试验,结果表明用浓度为2×10-5g/mL的IBA浸泡16小时处理的插穗使用全光雾插法生根率可高达96%。%Full sun-spay-cutting method is the most applied on rapid seedling technique in recent years, its characteristic takes root quickly and reproductive rate high. It is important way of good varieties 'rapid propagation. By using chemical treatments of IBA on twig cuttings under common cutting and the full sun-spay-cutting method for summer cuttings test .The results show that adopted full sun-spay-eutting method ,which was cutting stems in summer, dousing in 2×10-5g/mL IBA for 16 hours .The rooting rate could reach 96%.

  13. Effects of Harvest Stage on Ornamental Quality of Cut Flow ers of Herbaceous Peony (Paeonia lacti f lora Pall .)%采收期对芍药切花保鲜效果的影响

    Institute of Scientific and Technical Information of China (English)

    高水平; 魏春梅; 王焰; 吕明; 范丙友

    2013-01-01

    It is one of the most critical postharvest technologies to harvest cut herbaceous peony flowers at most suitable developmental stages .Using herbaceous peony cv .‘Xishimian’ as materi-als ,the effects of developmental stages on the vase life ,the opening life ,the flower diameter ,and the fresh weight loss rate were analyzed in order to ascertain the most suitable harvest stage for herbaceous peony .The result showed that the vase life and the opening life of cut herbaceous peo-ny flowers harvested at stage Ⅱ (Unfold-petal stage) were longer than at stages Ⅲ (Changing-color stage) and Ⅳ (Soft-bud stage) .Although the flower diameters of cut flower harvested at stage Ⅱ were smaller than at stages Ⅲ and Ⅳ ,the ornamental quality was not reduced signifi-cantly .Preservation solution (2% sucrose+200 mg/L 8-HQ+1 mol/L STS) had a good effect on flower diameter and reduced the fresh weight loss rate for herbaceous peony cv .‘Xishimian’ .%适期采收是芍药切花采后保鲜的关键技术。为确定芍药切花的最适采收期,以西施面芍药为材料,研究了采收期对芍药切花的瓶插寿命、开放寿命、切花花径、鲜质量损失率的影响。结果表明,Ⅱ级(松瓣期)采收的芍药切花瓶插寿命及开放寿命均优于Ⅲ(转色期)和Ⅳ级(暄蕾期)花,尽管切花花径略小于Ⅲ和Ⅳ级花,但其观赏价值并未明显降低;保鲜液(2%蔗糖+200 m g/L 8羟基喹啉+1 mol/L硫代硫酸银)对于增大切花花径、延缓并减少切花鲜质量损失具有一定促进作用。

  14. 超声提取白刺中总生物碱及大孔树脂纯化的工艺研究%Ultrasound extraction total alkaloids from Nitraria sibirica Pall and process research of macroporous resin purification

    Institute of Scientific and Technical Information of China (English)

    王玉玲; 曾会明; 张建秋; 马挺军

    2013-01-01

    为优化西伯利亚白刺种籽中总生物碱的提取工艺,采用超声波提取总碱,以硫酸阿托品为对照品,酸性染料比色法测定白刺中总生物碱的含量,探讨料液比、提取温度、时间、乙醇浓度4个因素的影响,确定最佳提取参数.从7种大孔吸附树脂中筛选出对白刺生物碱有最佳分离纯化效果的一种树脂,研究其对生物碱静态、动态吸附、解析效果.研究结果表明,当料液比为1∶20,温度60℃,时间40 min,乙醇浓度70%时,总生物碱提取率(生物碱/种籽重)最高,217.372 9 μg/g D101对白刺总生物碱的吸附、解析效果最好,对其进行动态吸附,可知最佳的工艺条件为上样液pH值为5,流速为0.75 mL/min,乙醇的洗脱浓度为80%.%In order to optimize the extract condition, total alkaloids in Nitraria sibirica was extracted by ultrasound and the content of total alkaloids was determined by the acidic dye colorimetry, the effects of solid-liquid ratio, temperature, time and ethanol concentration on the optimum extraction parameters were investigated, thereby determining the optimal extraction parameters; the best one of isolation and purification from seven kinds of resin were screened out to research its effects on the alkaloids of static, dynamic adsorption. The results show that with the conditions of solid-liquid ratio of 1:20, temperature 60 ℃, time 40 minutes, ethanol concentration of 70%, the highest total alkaloid extract rate was 217.372 9 μg/g; the adsorption and resolution effects of D101 on N. sibirica's total alkaloids were the best, the dynamic adsorption tests proved that the optimum process conditions were: sample solution pH 5, flow rate 0.75mL/min, ethanol concentration 80%.

  15. 叶底珠各部位中一叶荻碱和别一叶荻碱的含量测定%Content determination of securinine and allosecurinine from every section of Securinega suffruticosa(Pall.)Rehd.

    Institute of Scientific and Technical Information of China (English)

    吕海花; 李雪晴; 王冉冉; 徐凌川

    2016-01-01

    采用高效液相色谱法测定叶底珠中一叶荻碱和别一叶荻碱在各部位中的含量.结果表明,一叶获碱在各部位的质量分数w根皮>w细根>w枝干皮>w木部>w嫩叶芽(济南)>w枝叶>w根>w嫩叶芽(临沂).别一叶荻碱在各部位的质量分数w根皮>w细根>w木部>w枝干皮>w根>w嫩叶芽(临沂)>w嫩叶芽(济南)>w枝叶.本实验为叶底珠生药成分中一叶荻碱和别一叶荻碱的定性和定量测定提供了科学依据.

  16. 亳白芍GAP示范基地环境质量的评价%Study on Environmental Quality of the GAP base of Paeonia lactiflora Pall.in Bozhou

    Institute of Scientific and Technical Information of China (English)

    俞年军; 金传山; 姚宗凡; 王韵琴; 李文军

    2004-01-01

    亳白芍为毛茛科植物芍药Paeonia lactiflora Pall.的干燥根,为安徽亳州地区的道地栽培药材,因质量好、产量大而著名。安徽济人药业有限公司在亳州市谯城区十八里镇建立了亳白芍GAP生产基地。现就亳白芍实验示范基地环境质量的研究结果报告如下。

  17. Taxonomy Icon Data: Polysphondylium pallidum [Taxonomy Icon

    Lifescience Database Archive (English)

    Full Text Available Polysphondylium pallidum Polysphondylium pallidum Polysphondylium_pallidum_L.png Polysphondylium_pall...idum_NL.png Polysphondylium_pallidum_S.png Polysphondylium_pallidum_NS.png http://bioscien...cedbc.jp/taxonomy_icon/icon.cgi?i=Polysphondylium+pallidum&t=L http://biosciencedbc.jp/taxonomy_icon/icon.cgi?i=Polysphondylium+pall...idum&t=NL http://biosciencedbc.jp/taxonomy_icon/icon.cgi?i=Polysphondylium+pall...idum&t=S http://biosciencedbc.jp/taxonomy_icon/icon.cgi?i=Polysphondylium+pallidum&t=N

  18. Hi-C Observations of Penumbral Bright Dots: Comparison with the IRIS Results

    Science.gov (United States)

    Alpert, S. E.; Tiwari, S. K.; Moore, R. L.; Savage, S. L.; Winebarger, A. R.

    2014-01-01

    We observed bright dots (BDs) in a sunspot penumbra by using data acquired by the High Resolution Coronal Imager (Hi-C). The sizes of these BDs are on the order of 1 arcsecond (1') and are therefore hard to identify using the Atmospheric Imaging Assembly's (AIA) 0.6' pixel -1 resolution. These BDs become readily apparent with Hi-C's 0.1' pixel -1 resolution. Tian et al. (2014) found penumbral BDs in the transition region (TR) by using the Interface Region Imaging Spectrograph (IRIS). However, only a few of their dots could be associated with any enhanced brightness in AIA channels. In this work, we examine the characteristics of the penumbral BDs observed by Hi-C in a sunspot penumbra, including their sizes, lifetimes, speeds, and intensity. We also attempt to relate these BDs to the IRIS BDs. There are fewer Hi-C BDs in the penumbra than seen by IRIS, though different sunspots were studied and Hi-C had a short observation time. We use 193 A Hi-C data from July 11, 2012 which observed from 18:52:00 UT{18:56:00 UT and supplement it with data from AIA's 193 A passband to see the complete lifetime of the dots that were born before and/or lasted longer than Hi-C's 5-minute observation period. We use additional AIA passbands and compare the light curves of the BDs at different temperatures to test whether the Hi-C BDs are TR BDs. We find that most Hi-C BDs show clear movement, and of those that do, they move in a radial direction, toward or away from the sunspot umbra, sometimes doing both. BDs interact with other BDs, combining to fade away or brighten. The BDs that do not interact with other BDs tend to move less and last longer. We examine the properties of the Hi-C BDs and compare them with the IRIS BDs. Our BDs are similar to the exceptional values of the IRIS BDs: they move slower on average and their sizes and lifetimes are on the higher end of the distributions of IRIS BDs. We infer that our penumbral BDs are some of the larger BDs observed by IRIS.

  19. 77 FR 2331 - Self-Regulatory Organizations; NYSE Arca, Inc.; Notice of Filing and Immediate Effectiveness of...

    Science.gov (United States)

    2012-01-17

    ... (``SRO'') markets, as well as internalizing broker-dealers (``BDs'') and various forms of alternative... number of SROs, TRFs, BDs, and ATSs that currently produce proprietary data or are currently capable of... Edge. The fact that proprietary data from ATSs, BDs, and vendors can bypass SROs is significant in...

  20. 77 FR 1537 - Self-Regulatory Organizations; The NASDAQ Stock Market LLC; Notice of Filing and Immediate...

    Science.gov (United States)

    2012-01-10

    ..., the Commission granted self-regulatory organizations (``SROs'') and broker-dealers (``BDs'') increased... legislative history. If the free market should determine whether proprietary data is sold to BDs at all, it... ``eyeballs'' that contribute to their advertising revenue. Retail BDs, such as Schwab and Fidelity,...

  1. Optimização terapêutica na DPOC

    OpenAIRE

    Dias, Hermínia Brites

    2010-01-01

    Objectivos do estudo: identificar os principais broncodilatadores inalados e o seu mecanismo básico de acção; caracterizar as respostas funcionais aos BDs; caracterizar os principais dispositivos de administração dos BDs inalados; caracterizar o procedimento da administração dos BDs inalados de acordo com o dispositivo utilizado.

  2. 75 FR 71475 - Self-Regulatory Organizations; International Securities Exchange, LLC; Notice of Filing and...

    Science.gov (United States)

    2010-11-23

    ... numerous self-regulatory organization (``SRO'') markets, as well as internalizing broker-dealers (``BDs... discipline for the inputs of proprietary data products. The large number of SROs, TRFs, BDs, and ATSs that... BDs to produce joint proprietary data products. Additionally, order routers and market data...

  3. Assessing markets for business development services : what have we learned so far

    OpenAIRE

    Miehlbradt, Alexandra Overy

    2002-01-01

    Based on data from 13 assessments of business development services (BDS) markets. Explores the stage of development of various BDS markets and examines how organizations can assess the potential for their development. Discusses common preconceptions about BDS markets and identifies similarities and differences across services and countries.

  4. 75 FR 41916 - Self-Regulatory Organizations; The NASDAQ Stock Market LLC; Notice of Filing of a Proposed Rule...

    Science.gov (United States)

    2010-07-19

    ... broker-dealers (``BDs'') and aggregators such as the Direct Edge and LavaFlow electronic communications... common for BDs to further and exploit this competition by sending their order flow and transaction... or BD can combine with any other ECN, broker-dealer, or multiple ECNs or BDs to produce...

  5. 78 FR 21172 - Self-Regulatory Organizations; NYSE MKT LLC; Notice of Filing and Immediate Effectiveness of...

    Science.gov (United States)

    2013-04-09

    ..., as well as internalizing broker-dealers (``BDs'') and various forms of alternative trading systems... offering. Existence of Alternatives. The large number of SROs, BDs, and ATSs that currently produce..., NYSE Arca, NASDAQ OMX, BATS, and Direct Edge. The fact that proprietary data from ATSs, BDs,...

  6. 75 FR 73140 - Self-Regulatory Organizations; NASDAQ OMX PHLX, Inc.; Notice of Filing and Immediate...

    Science.gov (United States)

    2010-11-29

    ... (``SRO'') markets, as well as internalizing broker-dealers (``BDs'') and various forms of alternative... (January 8, 2010), 75 FR 2915 (January 19, 2010) (SR-ISE- 2009-103). The large number of SROs, TRFs, BDs..., BD, or multiple ATSs or BDs to produce joint proprietary data products. Additionally, order...

  7. 76 FR 70178 - Self-Regulatory Organizations; International Securities Exchange, LLC; Notice of Filing and...

    Science.gov (United States)

    2011-11-10

    ... numerous self-regulatory organization (``SRO'') markets, as well as internalizing broker-dealers (``BDs... discipline for the inputs of proprietary data products. The large number of SROs, TRFs, BDs, and ATSs that... BDs to produce joint proprietary data products. Additionally, order routers and market data...

  8. 75 FR 47668 - Self-Regulatory Organizations; NASDAQ Stock Market LLC; Notice of Filing and Immediate...

    Science.gov (United States)

    2010-08-06

    ... broker-dealers (``BDs'') and various forms of alternative trading systems (``ATSs''), including dark... attract internalized transaction reports. It is common for BDs to further and exploit this competition by... discipline for the inputs of proprietary data products. The large number of SROs, TRFs, BDs, and ATSs...

  9. 75 FR 39315 - Self-Regulatory Organizations; The NASDAQ Stock Market LLC; Notice of Filing and Order Granting...

    Science.gov (United States)

    2010-07-08

    ... organization (``SRO'') markets, as well as internalizing broker-dealers (``BDs'') and various forms of... for BDs to further and exploit this competition by sending their order flow and transaction reports to.... The large number of SROs, TRFs, BDs, and ATSs that currently produce proprietary data or are...

  10. 75 FR 47871 - Self-Regulatory Organizations; The NASDAQ Stock Market LLC; Notice of Filing of a Proposed Rule...

    Science.gov (United States)

    2010-08-09

    ... self-regulatory organization (``SRO'') markets, as well as internalizing broker-dealers (``BDs'') and... reports. It is common for BDs to further and exploit this competition by sending their order flow and... proprietary data products. The large number of SROs, TRFs, BDs, and ATSs that currently produce...

  11. 76 FR 47630 - Self-Regulatory Organizations; International Securities Exchange, LLC; Notice of Filing and...

    Science.gov (United States)

    2011-08-05

    ... numerous self-regulatory organization (``SRO'') markets, as well as internalizing broker-dealers (``BDs... discipline for the inputs of proprietary data products. The large number of SROs, TRFs, BDs, and ATSs that... BDs to produce joint proprietary data products. Additionally, order routers and market data...

  12. 78 FR 41447 - Self-Regulatory Organizations; BATS Y-Exchange, Inc.; Notice of Filing and Immediate...

    Science.gov (United States)

    2013-07-10

    ... broker-dealers (``BDs'') increased authority and flexibility to offer new and unique market data to the... history. If the free market should determine whether proprietary data is sold to BDs at all, it follows... degree of price sensitivity on the part of BDs with order flow, since they may readily reduce costs...

  13. 75 FR 19444 - Self-Regulatory Organizations; The NASDAQ Stock Market LLC; Notice of Filing and Order Granting...

    Science.gov (United States)

    2010-04-14

    ...'') markets, as well as broker-dealers (``BDs'') and aggregators such as the DirectEdge electronic... attract internalized transaction reports. It is common for BDs to further and exploit this competition by... or BDs to produce jointly proprietary data products. Additionally, non-broker-dealers such as...

  14. Papers

    DEFF Research Database (Denmark)

    Thoft-Christensen, Palle

    The chapters in this Volume 7 of a series of PAPERS are based on papers published in the period 2004 - 2008 authored/co-authored by Palle Thoft-Christensen......The chapters in this Volume 7 of a series of PAPERS are based on papers published in the period 2004 - 2008 authored/co-authored by Palle Thoft-Christensen...

  15. Ds+ Exclusive Hadronic Decays Involving omega

    OpenAIRE

    The CLEO Collaboration; Ge, J. Y.

    2009-01-01

    Using data collected near the Ds*+ Ds- peak production energy Ecm=4170 MeV by the CLEO-c detector, we search for Ds+ exclusive hadronic decays involving omega. We find B(Ds+ -> pi+ omega) = (0.21 +- 0.09 +- 0.01)%, B(Ds+ -> pi+ pi0 omega) = (2.78 +- 0.65 +- 0.25)%, B(Ds+ -> pi+ pi+ pi- omega) = (1.58 +- 0.45 +- 0.09)%, B(Ds+ -> pi+ eta omega) = (0.85 +- 0.54 +- 0.06)%, B(Ds+ -> K+ omega) K+ pi0 omega) K+ pi+ pi- omega) K+ eta omega)

  16. Hi-C Observations of Penumbral Bright Dots

    Science.gov (United States)

    Alpert, S. E.; Tiwari, S. K.; Moore, R. L.; Savage, S. L.; Winebarger, A. R.

    2014-01-01

    We use high-quality data obtained by the High Resolution Coronal Imager (Hi-C) to examine bright dots (BDs) in a sunspot's penumbra. The sizes of these BDs are on the order of 1 arcsecond (1") and are therefore hard to identify using the Atmospheric Imaging Assembly's (AIA) 0.6" pixel(exp -1) resolution. These BD become readily apparent with Hi-C's 0.1" pixel(exp -1) resolution. Tian et al. (2014) found penumbral BDs in the transition region (TR) by using the Interface Region Imaging Spectrograph (IRIS). However, only a few of their dots could be associated with any enhanced brightness in AIA channels. In this work, we examine the characteristics of the penumbral BDs observed by Hi-C in a sunspot penumbra, including their sizes, lifetimes, speeds, and intensity. We also attempt to find any association of these BDs to the IRIS BDs. There are fewer Hi-C BDs in the penumbra than seen by IRIS, though different sunspots were studied. We use 193 Angstroms Hi-C data from July 11, 2012 which observed from approximately 18:52:00 UT- 18:56:00 UT and supplement it with data from AIA's 193 Angstrom passband to see the complete lifetime of the dots that were born before and/or lasted longer than Hi- C's 5-minute observation period. We use additional AIA passbands and compare the light curves of the BDs at different temperatures to test whether the Hi-C BDs are TR BDs. We find that most Hi-C BDs show clear movement, and of those that do, they move in a radial direction, toward or away from the sunspot umbra. Single BDs interact with other BDs, combining to fade away or brighten. The BDs that do not interact with other BDs tend to move less. Many of the properties of our BDs are similar to the extreme values of the IRIS BDs, e.g., they move slower on average and their sizes and lifetimes are on the higher end of the IRIS BDs. We infer that our penumbral BDs are the large-scale end of the distribution of BDs observed by IRIS.

  17. Test on precision of combined single-frequency GPS/BDS deformation monitoring system%单频GPS/BDS组合变形监测系统精度测试

    Institute of Scientific and Technical Information of China (English)

    石强; 戴吾蛟; 杨国祥; 曾凡河; 李广春

    2016-01-01

    为测试单频GPS/BDS组合变形监测系统的精度,选择在五强溪库岸边坡环境,采用人工变形模拟位移装置进行了多组精度测试实验数据采集,并采用自主研发的GPS/BDS组合变形监测数据处理软件进行数据处理.结果表明,在该库岸边坡变形监测环境下,单频GPS/BDS组合变形监测系统的定位精度优于GPS、BDS单系统,其定位精度比单频GPS系统在E方向提高0.8mm,N方向提高1.2mm,U方向提高4.5mm.说明在有较多遮挡的变形监测环境中;GPS/BDS组合系统能明显改善监测精度.

  18. Establishing Calibration Center for BDS Navigation and Positioning Products Based on Signal Simulator%基于信号模拟器的BDS导航定位产品检测中心建设

    Institute of Scientific and Technical Information of China (English)

    许江涛; 庞尚益; 吴学文; 董旭明

    2015-01-01

    随着BDS导航定位产品的应用日益广泛,随之带来的检定需求越来越迫切.针对此类产品的检定,提出了建立BDS导航定位产品检测中心,开展BDS导航定位产品检定方法研究,对各类BDS导航定位产品的测量精度、定位精度和各项计量性能等做出定量、有效、精确的评估和校正.文章介绍了BDS接收机检测方案,着重介绍了BDS接收机室内检定研究先期取得的一些成果和存在的不足,提出了攻克方向.通过实验验证,利用BDS接收机室内检定系统进行BDS接收机检定,理论和方法可行.

  19. Impact analysis of GPS/BDS combined positioning on success rate of ambiguity-fixing%GPS/BDS组合定位对模糊度固定成功率的影响

    Institute of Scientific and Technical Information of China (English)

    隋心; 徐爱功; 施闯

    2015-01-01

    为分析GPS/BDS组合系统在模糊度固定方面的性能,采用不同长度短基线观测数据和GPS/BDS组合定位软件,分别对GPS单系统、BDS单系统和GPS/BDS组合系统下的模糊度固定成功率进行统计分析,研究结果表明:GPS/BDS组合系统能够显著改善模糊度固定成功率,即使在单频情况下组合系统相对于单系统也可快速准确的对模糊度进行固定.

  20. 双频BDS实时精密单点定位算法和精度分析%Accuracy analysis of dual-frequency BDS real-time precise point positioning algorithm

    Institute of Scientific and Technical Information of China (English)

    刘国仕; 薛建华; 付文举

    2016-01-01

    为了对BDS实时精密单点定位性能进行评估,该文提出了一种适用于BDS系统的实时精密单点定位算法.采用无电离组合模型作为双频实时精密单点定位的数学模型,采用电离层残差法和Melbourne-Wübbena组合实时探测相位周跳,进而单历元实时估计坐标、模糊度等参数,实现了BDS双频实时精密单点定位算法.基于此算法,采用轨道钟差产品和采样间隔为1 s的观测数据,模拟实时BDS双频精密单点定位算法,并评估其定位精度.实验结果表明:BDS双频实时定位的平面精度和三维精度均为0.2m左右.

  1. Helmert variance component estimation of BDS satellite orbit determination and algorithm improvement%一种利用方差分量估计的BDS卫星定轨算法

    Institute of Scientific and Technical Information of China (English)

    祖安然; 宋力杰; 王琰; 李中全

    2016-01-01

    针对采用Helmert方差分量估计的方法来调节BDS不同类型卫星之间的权比时,出现的区域站MEO卫星观测值数量少、卡尔曼滤波开始阶段不稳定等问题,提出了一种待滤波稳定后再进行Helmert方差分量估计的改进算法.该算法可以根据卫星类型以及它们的数目,自适应地采取不同的策略.基于BDS观测数据的实验结果表明,采用改进的Helmert方差分量估计方法进行BDS卫星卡尔曼滤波定轨,提高了BDS卫星轨道平均径向精度.

  2. “植物的呼吸现象”的教学设计——北京数字学校(BDS)一节录像课的教学设计与思考

    Institute of Scientific and Technical Information of China (English)

    刘玮

    2013-01-01

    通过引导学生对植物呼吸现象一系列实验的设计、分析、归纳总结得出本节课的核心概念,并应用概念解决实际问题.本节内容是一节BDS录像课,根据其特有形式,笔者从3个方面分析、思考如何上好BDS录像课的关键点.

  3. 基于动态阿伦方差的北斗星载原子钟特性分析%Analysis of Characteristics of BDS On-board Atomic Clocks Based on Dynamic AllanVariance

    Institute of Scientific and Technical Information of China (English)

    李铸洋; 米科峰; 周培元

    2016-01-01

    针对传统的阿伦方差等评价手段无法实现对星载原子钟进行动态性能评估的缺陷,将动态阿伦方差引入到BDS星载原子钟的监测和评估中.采用BDS多星定轨卫星钟差产品,基于动态阿伦方差算法对BDS原子钟在轨性能进行了研究,并利用BDS星地双向无线电时间比对钟差数据对其结果进行了对比和验证.实验结果表明,动态阿伦方差算法可以实现对BDS星载原子钟动态特性的有效评估,BDS原子钟的万秒稳定度的量级基本为在10-14,但是随着时间有一定的变化.

  4. Assessment of the Contribution of BeiDou GEO, IGSO, and MEO Satellites to PPP in Asia—Pacific Region

    Directory of Open Access Journals (Sweden)

    Qile Zhao

    2015-12-01

    Full Text Available In contrast to the US Global Positioning System (GPS, the Russian Global Navigation Satellite System (GLONASS and the European Galileo, the developing Chinese BeiDou satellite navigation system (BDS consists of not only Medium Earth Orbit (MEO, but also Geostationary Orbit (GEO as well as Inclined Geosynchronous Orbit (IGSO satellites. In this study, the Precise Point Positioning (PPP and PPP with Integer Ambiguity Resolution (IAR are obtained. The contributions of these three different types of BDS satellites to PPP in Asia-Pacific region are assessed using data from selected 20 sites over more than four weeks. By using various PPP cases with different satellite combinations, in general, the largest contribution of BDS IGSO among the three kinds of BDS satellites to the reduction of convergence time and the improvement of positioning accuracy, particularly in the east direction, is identified. These PPP cases include static BDS only solutions and static/kinematic ambiguity-float and -fixed PPP with the combination of GPS and BDS. The statistical results demonstrate that the inclusion of BDS GEO and MEO satellites can improve the observation condition and result in better PPP performance as well. When combined with GPS, the contribution of BDS to the reduction of convergence time is, however, not as significant as that of GLONASS. As far as the positioning accuracy is concerned, GLONASS improves the accuracy in vertical component more than BDS does, whereas similar improvement in horizontal component can be achieved by inclusion of BDS IGSO and MEO as GLONASS.

  5. Hi-C Observations of Sunspot Penumbral Bright Dots

    CERN Document Server

    Alpert, Shane E; Moore, Ronald L; Winebarger, Amy R; Savage, Sabrina L

    2016-01-01

    We report observations of bright dots (BDs) in a sunspot penumbra using High Resolution Coronal Imager (Hi-C) data in 193 \\AA\\ and examine their sizes, lifetimes, speeds, and intensities. The sizes of the BDs are on the order of 1\\arcsec\\ and are therefore hard to identify in the Atmospheric Imaging Assembly (AIA) 193 \\AA\\ images, which have 1.2\\arcsec\\ spatial resolution, but become readily apparent with Hi-C's five times better spatial resolution. We supplement Hi-C data with data from AIA's 193 \\AA\\ passband to see the complete lifetime of the BDs that appeared before and/or lasted longer than Hi-C's 3-minute observation period. Most Hi-C BDs show clear lateral movement along penumbral striations, toward or away from the sunspot umbra. Single BDs often interact with other BDs, combining to fade away or brighten. The BDs that do not interact with other BDs tend to have smaller displacements. These BDs are about as numerous but move slower on average than Interface Region Imaging Spectrograph (IRIS) BDs, rec...

  6. RECYCLING RECOVERED WOOD-BASED MATERIALS. FLATNESS, MOR AND MOE OF PANELS MADE FROM RECOVERED WOODEN BASED MATERIALS

    Directory of Open Access Journals (Sweden)

    Andrea DEÁK

    2015-12-01

    Full Text Available The objective of the research was to study the mechanical properties of recovered solid wood and wood-based materials, to create new panels made of strips of recovered oak and spruce wood, particleboards and blockboards and to study their mechanical properties, feasibility and use. Flatness, MOR and MOE were determined for the solid wood and wood-based materials recovered from construction and demolition sites. Four types of experimental panels (PL1, PL2, PALL1 and PALL2 were manufactured from solid wood strips alternating with either particleboard or blockboard strips glued edge to edge. Some of their physical and mechanical properties were investigated. All new panels made from recovered materials fell within allowable limits specified in European standard requirements for panel flatness. Panels type PL2, PALL1 and PALL2 show better values for MoR and MoE parallel to the grain when compared to the respective values for the recovered wood-based materials of which they are made, but panels type PL1 show no change. Panels type PALL2 are preferable to panels type PALL1 due to better mechanical properties. Panels type PL1 and PL2 show no such differences in their structure. The results also show that these new panels can be used successfully in furniture production, provided panels type PL1, PL2 ad PALL1 do not bear loads perpendicular to the grain or receive reinforcing elements.

  7. Ambiguity resolved precise point positioning with GPS and BeiDou

    Science.gov (United States)

    Pan, Li; Xiaohong, Zhang; Fei, Guo

    2016-07-01

    This paper focuses on the contribution of the global positioning system (GPS) and BeiDou navigation satellite system (BDS) observations to precise point positioning (PPP) ambiguity resolution (AR). A GPS + BDS fractional cycle bias (FCB) estimation method and a PPP AR model were developed using integrated GPS and BDS observations. For FCB estimation, the GPS + BDS combined PPP float solutions of the globally distributed IGS MGEX were first performed. When integrating GPS observations, the BDS ambiguities can be precisely estimated with less than four tracked BDS satellites. The FCBs of both GPS and BDS satellites can then be estimated from these precise ambiguities. For the GPS + BDS combined AR, one GPS and one BDS IGSO or MEO satellite were first chosen as the reference satellite for GPS and BDS, respectively, to form inner-system single-differenced ambiguities. The single-differenced GPS and BDS ambiguities were then fused by partial ambiguity resolution to increase the possibility of fixing a subset of decorrelated ambiguities with high confidence. To verify the correctness of the FCB estimation and the effectiveness of the GPS + BDS PPP AR, data recorded from about 75 IGS MGEX stations during the period of DOY 123-151 (May 3 to May 31) in 2015 were used for validation. Data were processed with three strategies: BDS-only AR, GPS-only AR and GPS + BDS AR. Numerous experimental results show that the time to first fix (TTFF) is longer than 6 h for the BDS AR in general and that the fixing rate is usually less than 35 % for both static and kinematic PPP. An average TTFF of 21.7 min and 33.6 min together with a fixing rate of 98.6 and 97.0 % in static and kinematic PPP, respectively, can be achieved for GPS-only ambiguity fixing. For the combined GPS + BDS AR, the average TTFF can be shortened to 16.9 min and 24.6 min and the fixing rate can be increased to 99.5 and 99.0 % in static and kinematic PPP, respectively. Results also show that GPS + BDS PPP AR outperforms

  8. Ambiguity resolved precise point positioning with GPS and BeiDou

    Science.gov (United States)

    Pan, Li; Xiaohong, Zhang; Fei, Guo

    2017-01-01

    This paper focuses on the contribution of the global positioning system (GPS) and BeiDou navigation satellite system (BDS) observations to precise point positioning (PPP) ambiguity resolution (AR). A GPS + BDS fractional cycle bias (FCB) estimation method and a PPP AR model were developed using integrated GPS and BDS observations. For FCB estimation, the GPS + BDS combined PPP float solutions of the globally distributed IGS MGEX were first performed. When integrating GPS observations, the BDS ambiguities can be precisely estimated with less than four tracked BDS satellites. The FCBs of both GPS and BDS satellites can then be estimated from these precise ambiguities. For the GPS + BDS combined AR, one GPS and one BDS IGSO or MEO satellite were first chosen as the reference satellite for GPS and BDS, respectively, to form inner-system single-differenced ambiguities. The single-differenced GPS and BDS ambiguities were then fused by partial ambiguity resolution to increase the possibility of fixing a subset of decorrelated ambiguities with high confidence. To verify the correctness of the FCB estimation and the effectiveness of the GPS + BDS PPP AR, data recorded from about 75 IGS MGEX stations during the period of DOY 123-151 (May 3 to May 31) in 2015 were used for validation. Data were processed with three strategies: BDS-only AR, GPS-only AR and GPS + BDS AR. Numerous experimental results show that the time to first fix (TTFF) is longer than 6 h for the BDS AR in general and that the fixing rate is usually less than 35 % for both static and kinematic PPP. An average TTFF of 21.7 min and 33.6 min together with a fixing rate of 98.6 and 97.0 % in static and kinematic PPP, respectively, can be achieved for GPS-only ambiguity fixing. For the combined GPS + BDS AR, the average TTFF can be shortened to 16.9 min and 24.6 min and the fixing rate can be increased to 99.5 and 99.0 % in static and kinematic PPP, respectively. Results also show that GPS + BDS PPP AR outperforms

  9. Comprehensive Comparisons of Satellite Data, Signals, and Measurements between the BeiDou Navigation Satellite System and the Global Positioning System.

    Science.gov (United States)

    Jan, Shau-Shiun; Tao, An-Lin

    2016-05-13

    The Chinese BeiDou navigation satellite system (BDS) aims to provide global positioning service by 2020. The combined use of BDS and Global Positioning System (GPS) is proposed to provide navigation service with more stringent requirements. Actual satellite data, signals and measurements were collected for more than one month to analyze the positioning service qualities from both BDS and GPS. In addition to the conversions of coordinate and timing system, five data quality analysis (DQA) methods, three signal quality analysis (SQA) methods, and four measurement quality analysis (MQA) methods are proposed in this paper to improve the integrated positioning performance of BDS and GPS. As shown in the experiment results, issues related to BDS and GPS are resolved by the above proposed quality analysis methods. Thus, the anomalies in satellite data, signals and measurements can be detected by following the suggested resolutions to enhance the positioning performance of the combined use of BDS and GPS in the Asia Pacific region.

  10. Binge drinking during adolescence and young adulthood is associated with deficits in verbal episodic memory

    Science.gov (United States)

    Cadaveira, Fernando; Caamaño-Isorna, Francisco; Rodríguez-Holguín, Socorro

    2017-01-01

    Binge drinking (BD), a harmful pattern of alcohol consumption, is common during adolescence. Young adults with alcohol use disorders exhibit hippocampal alterations and episodic memory deficits. However, it is not known how these difficulties progress in community BD adolescents. Our objective was to analyze the relationship between BD trajectory and verbal episodic memory during the developmental period spanning from adolescence and to early adulthood. An initial sample of 155 male and female first-year university students with no other risk factors were followed over six years. Participants were classified as stable non-BDs, stable BDs and ex-BDs according to the third AUDIT item. At baseline, participants comprised 36 ♂/ 40 ♀ non-BDs (18.58 years), 40 ♂/ 39 ♀ BDs (18.87 years), and at the third follow-up, they comprised 8 ♂/ 8 ♀ stable non-BDs (25.49 years), 2 ♂/ 2 ♀ stable BDs (25.40) and 8 ♂/ 12 ♀ ex-BDs (24.97 years). Episodic memory was assessed four times with the Logical Memory subtest (WMS-III) and the Rey Auditory Verbal Learning Test (RAVLT). Generalized linear mixed models were applied. The results showed that, relative to non-BDs, stable BDs presented difficulties in immediate and delayed recall in the Logical Memory subtest. These difficulties remained stable over time. The short-term ex-BDs continued to display difficulties in immediate and delayed recall in the Logical Memory subtest, but long-term ex-BDs did not. The effects were not influenced by age of alcohol onset, frequency of cannabis use, tobacco use or psychopathological distress. In conclusion, BD during adolescence and young adulthood is associated with episodic memory deficits. Abandoning the BD pattern may lead to partial recovery. These findings are consistent with the vulnerability of the adolescent hippocampus to the neurotoxic effects of alcohol. PMID:28152062

  11. Binge drinking during adolescence and young adulthood is associated with deficits in verbal episodic memory.

    Science.gov (United States)

    Carbia, Carina; Cadaveira, Fernando; Caamaño-Isorna, Francisco; Rodríguez-Holguín, Socorro; Corral, Montse

    2017-01-01

    Binge drinking (BD), a harmful pattern of alcohol consumption, is common during adolescence. Young adults with alcohol use disorders exhibit hippocampal alterations and episodic memory deficits. However, it is not known how these difficulties progress in community BD adolescents. Our objective was to analyze the relationship between BD trajectory and verbal episodic memory during the developmental period spanning from adolescence and to early adulthood. An initial sample of 155 male and female first-year university students with no other risk factors were followed over six years. Participants were classified as stable non-BDs, stable BDs and ex-BDs according to the third AUDIT item. At baseline, participants comprised 36 ♂/ 40 ♀ non-BDs (18.58 years), 40 ♂/ 39 ♀ BDs (18.87 years), and at the third follow-up, they comprised 8 ♂/ 8 ♀ stable non-BDs (25.49 years), 2 ♂/ 2 ♀ stable BDs (25.40) and 8 ♂/ 12 ♀ ex-BDs (24.97 years). Episodic memory was assessed four times with the Logical Memory subtest (WMS-III) and the Rey Auditory Verbal Learning Test (RAVLT). Generalized linear mixed models were applied. The results showed that, relative to non-BDs, stable BDs presented difficulties in immediate and delayed recall in the Logical Memory subtest. These difficulties remained stable over time. The short-term ex-BDs continued to display difficulties in immediate and delayed recall in the Logical Memory subtest, but long-term ex-BDs did not. The effects were not influenced by age of alcohol onset, frequency of cannabis use, tobacco use or psychopathological distress. In conclusion, BD during adolescence and young adulthood is associated with episodic memory deficits. Abandoning the BD pattern may lead to partial recovery. These findings are consistent with the vulnerability of the adolescent hippocampus to the neurotoxic effects of alcohol.

  12. Evaluation of the efficiency of biofield diagnostic system in breast cancer detection using clinical study results and classifiers.

    Science.gov (United States)

    Subbhuraam, Vinitha Sree; Ng, E Y K; Kaw, G; Acharya U, Rajendra; Chong, B K

    2012-02-01

    The division of breast cancer cells results in regions of electrical depolarisation within the breast. These regions extend to the skin surface from where diagnostic information can be obtained through measurements of the skin surface electropotentials using sensors. This technique is used by the Biofield Diagnostic System (BDS) to detect the presence of malignancy. This paper evaluates the efficiency of BDS in breast cancer detection and also evaluates the use of classifiers for improving the accuracy of BDS. 182 women scheduled for either mammography or ultrasound or both tests participated in the BDS clinical study conducted at Tan Tock Seng hospital, Singapore. Using the BDS index obtained from the BDS examination and the level of suspicion score obtained from mammography/ultrasound results, the final BDS result was deciphered. BDS demonstrated high values for sensitivity (96.23%), specificity (93.80%), and accuracy (94.51%). Also, we have studied the performance of five supervised learning based classifiers (back propagation network, probabilistic neural network, linear discriminant analysis, support vector machines, and a fuzzy classifier), by feeding selected features from the collected dataset. The clinical study results show that BDS can help physicians to differentiate benign and malignant breast lesions, and thereby, aid in making better biopsy recommendations.

  13. Estimation of differential code biases for Beidou navigation system using multi-GNSS observations: How stable are the differential satellite and receiver code biases?

    Science.gov (United States)

    Xue, Junchen; Song, Shuli; Zhu, Wenyao

    2016-04-01

    Differential code biases (DCBs) are important parameters that must be estimated accurately and reliably for high-precision GNSS applications. For optimal operational service performance of the Beidou navigation system (BDS), continuous monitoring and constant quality assessment of the BDS satellite DCBs are crucial. In this study, a global ionospheric model was constructed based on a dual system BDS/GPS combination. Daily BDS DCBs were estimated together with the total electron content from 23 months' multi-GNSS observations. The stability of the resulting BDS DCB estimates was analyzed in detail. It was found that over a long period, the standard deviations (STDs) for all satellite B1-B2 DCBs were within 0.3 ns (average: 0.19 ns) and for all satellite B1-B3 DCBs, the STDs were within 0.36 ns (average: 0.22 ns). For BDS receivers, the STDs were greater than for the satellites, with most values BDS satellite DCBs between two consecutive days was BDS DCBs, they only require occasional estimation or calibration. Furthermore, the 30-day averaged satellite DCBs can be used reliably for the most demanding BDS applications.

  14. Astrophysics of brown dwarfs; Proceedings of the Workshop, George Mason University, Fairfax, VA, Oct. 14, 15, 1985

    Science.gov (United States)

    Kafatos, Minas C. (Editor); Harrington, Robert S. (Editor); Maran, Stephen P. (Editor)

    1986-01-01

    Various reports on theoretical and observational studies of brown dwarfs (BDs) are presented. The topics considered include: astrometric detection of BDs, search for substellar companions to nearby stars using IR imaging, constraints on BD mass function from optical and IR searches, properties of stellar objects near the main sequence mass limit, search for low-mass stellar companions with the HF precision velocity technique, dynamical search for substellar objects, search for BDs in the IRAS data base, deep CCD survey for low mass stars in the disk and halo, the Berkeley search for a faint solar companion, the luminosity function for late M stars, astronomic search for IR dwarfs, and the role of the Space Telescope in the detection of BDs. Also addressed are: theoretical significance of BDs, evolution of super-Jupiters, compositional indicators in IR spectra of BDs, evolution of BDs and the evolutionary status of VB8B, the position of BDs on universal diagrams, theoretical determination of the minimum protostellar mass, Population II BDs and dark halos.

  15. Pell数平方倒数的无限和%The Infinite Sum of Reciprocal of the Square of the Pell Numbers

    Institute of Scientific and Technical Information of China (English)

    张文鹏; 王婷婷

    2011-01-01

    In this paper, we consider infinite sums derived from the reciprocals of the square of the Pall numbers. Then applying the floor function to the reciprocals of this sums ,we obtain a new and interesting identity involving the Pell numbers.

  16. Uikala prügila sai puhastusseadmed / Külli Kriis

    Index Scriptorium Estoniae

    Kriis, Külli, 1961-

    2004-01-01

    Ilmunud ka: Severnoje Poberezhje, 22. mai 2004, lk. 3. 21. mail 2004 Ida-Virumaal Uikala prügilas avatud puhastusseadmete kompleksist, mille valmistas ja paigaldas rahvusvaheline ettevõte Pall Corporation

  17. The hidden world within plants

    NARCIS (Netherlands)

    Hardoim, Pablo R.; Overbeek, Van Leonard S.; Berg, Gabriele; Pirttilä, Anna Maria; Compant, Stéphane; Campisano, Andrea; Döring, Matthias; Sessitsch, Angela

    2015-01-01

    <p>All plants are inhabited internally by diverse microbial communities comprising bacterial, archaeal, fungal, and protistic taxa. These microorganisms showing endophytic lifestyles play crucial roles in plant development, growth, fitness, and diversification. The increasing awareness of and inform

  18. NCBI nr-aa BLAST: CBRC-VPAC-01-0563 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-VPAC-01-0563 gb|ABP35650.1| cytochrome b [Globodera pallida] gb|ABP35651.1| cytochrome b [Globodera pal...lida] gb|ABP35652.1| cytochrome b [Globodera pallida] gb|ABP35653.1| cytochrome b [Globodera pall...ida] gb|ABP35654.1| cytochrome b [Globodera pallida] gb|ABP35656.1| cytochrome b [Globodera pall...ida] gb|ABP35657.1| cytochrome b [Globodera pallida] gb|ABP35658.1| cytochrome b [Globodera pall...ida] gb|ABP35659.1| cytochrome b [Globodera pallida] emb|CAL64133.1| cytochrome b [Globodera pall

  19. Two New Antibacterial Iridoids from Patrinia rupestris

    Institute of Scientific and Technical Information of China (English)

    2006-01-01

    Two new iridoids (1 and 2) were isolated from the roots of Patrinia rupestris (Pall.) Juss.Their structures were elucidated by spectroscopic methods. Compounds 1 and 2 exhibited strong antibacterial activities against Eschecichia coli and Staphylococcus aureus, respectively.

  20. Data mining approach to evaluating the use of skin surface electropotentials for breast cancer detection.

    Science.gov (United States)

    Sree, S Vinitha; Ng, E Y K; Acharya, U Rajendra

    2010-02-01

    The Biofield Diagnostic System (BDS) uses a score formed with measured skin surface electropotentials and a prior Level Of Suspicion (LOS) value (predicted by the physician based on the patient's ultrasound or mammography results) to calculate a revised Post-BDS LOS to indicate the presence of breast cancer. The demographic details, BDS test results, and the recorded electropotential values form a potentially useful dataset, which can be further explored with data mining tools to extract important information that can be used to improve the current predictive accuracy of the device. According to the proposed data mining framework, the BDS dataset with 291 cases was first pre-processed to remove outliers and then used to select relevant and informative features for classifier development and finally to evaluate the capability of the built classifiers in detecting the presence of the disease. Two popular feature selection techniques, namely, the filter and wrapper methods, were used in parallel for feature selection. A few statistical inference based classifiers and neural networks were used for classification. The proposed technique significantly improved the BDS prediction accuracy. Also, the use of prior LOS and, hence, the Post-BDS LOS, associates a mild subjective interpretation to the current prediction methodology used by BDS. However, the feature subset selected in our analysis that gave the best accuracy did not use either of these features. This result indicates the possibility of using BDS as a better objective assessment tool for breast cancer detection.

  1. NCBI nr-aa BLAST: CBRC-ACAR-01-0676 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-ACAR-01-0676 sp|Q9BDS7|GPR15_MACFA G-protein coupled receptor 15 gb|AAK25741.1...|AF291670_1 orphan seven transmembrane receptor GPR15 [Macaca fascicularis] Q9BDS7 1e-103 56% ...

  2. NCBI nr-aa BLAST: CBRC-OGAR-01-1054 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-OGAR-01-1054 sp|Q9BDS7|GPR15_MACFA G-protein coupled receptor 15 gb|AAK25741.1...|AF291670_1 orphan seven transmembrane receptor GPR15 [Macaca fascicularis] Q9BDS7 0.0 87% ...

  3. NCBI nr-aa BLAST: CBRC-ETEL-01-1442 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-ETEL-01-1442 sp|Q9BDS7|GPR15_MACFA G-protein coupled receptor 15 gb|AAK25741.1...|AF291670_1 orphan seven transmembrane receptor GPR15 [Macaca fascicularis] Q9BDS7 1e-167 80% ...

  4. Single Point Positioning Accuracy Analysis of Beidou System%北斗系统单点定位精度分析

    Institute of Scientific and Technical Information of China (English)

    刘继州

    2015-01-01

    The positioning accuracy of single BDS system and BDS/GPS integrated system in the Asia-Pacific region are analyzed based on Beidou system ( BDS ) and GPS measurements .Results indicate that the horizontal and vertical positioning accuracy of BDS system can achieve 2m and 6m, respectively, which can meet the demand of BDS navigation users .The positioning accuracy of BDS/GPS integrated system is superior to single BDS system . BDS/GPS integrated system increases the number of visible satellites , and also improves the reliability and availa-bility of the navigation user .%基于北斗系统和GPS实测数据,分析了BDS单系统与BDS/GPS 组合系统在亚太地区的定位精度。结果表明, BDS单系统水平方向的定位精度可达2m,高程方向定位精度可达6m,可满足导航用户定位需求。同时, BDS/GPS组合系统定位精度优于BDS单系统,能提高导航用户定位的可靠性与可用性。

  5. NCBI nr-aa BLAST: CBRC-OPRI-01-1077 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-OPRI-01-1077 sp|Q9BDS7|GPR15_MACFA RecName: Full=G-protein coupled receptor 15... gb|AAK25741.1|AF291670_1 orphan seven transmembrane receptor GPR15 [Macaca fascicularis] Q9BDS7 1e-176 77% ...

  6. NCBI nr-aa BLAST: CBRC-OLAT-05-0030 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-OLAT-05-0030 sp|Q9BDS7|GPR15_MACFA G-protein coupled receptor 15 gb|AAK25741.1...|AF291670_1 orphan seven transmembrane receptor GPR15 [Macaca fascicularis] Q9BDS7 5e-52 40% ...

  7. NCBI nr-aa BLAST: CBRC-SARA-01-1392 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-SARA-01-1392 sp|Q9BDS7|GPR15_MACFA G-protein coupled receptor 15 gb|AAK25741.1...|AF291670_1 orphan seven transmembrane receptor GPR15 [Macaca fascicularis] Q9BDS7 1e-169 81% ...

  8. NCBI nr-aa BLAST: CBRC-RMAC-02-0010 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-RMAC-02-0010 sp|Q9BDS7|GPR15_MACFA G-protein coupled receptor 15 gb|AAK25741.1...|AF291670_1 orphan seven transmembrane receptor GPR15 [Macaca fascicularis] Q9BDS7 0.0 98% ...

  9. NCBI nr-aa BLAST: CBRC-RMAC-02-0030 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-RMAC-02-0030 sp|Q9BDS8|CCR3_MACFA C-C chemokine receptor type 3 (C-C CKR-3) (C...C-CKR-3) (CCR-3) (CCR3) (CKR3) (CD193 antigen) gb|AAK25739.1| chemokine receptor CCR3 [Macaca fascicularis] Q9BDS8 0.0 98% ...

  10. Bromodomain and extra-terminal (BET) family proteins: New therapeutic targets in major diseases

    Indian Academy of Sciences (India)

    Balasundaram Padmanabhan; Shruti Mathur; Manjula Ramu; Shailesh Tripathi

    2016-06-01

    The bromodomains and extra-terminal domain (BET) family proteins recognize acetylated chromatin through their bromodomains (BDs) and helps in regulating gene expression. BDs are chromatin ‘readers’; by interacting with acetylated lysines on the histone tails, they recruit chromatin-regulating proteins on the promoter region to regulate gene expression and repression. Extensive efforts have been employed by the scientific communities worldwide, to identify and develop potential inhibitors of BET family BDs to regulate protein expression by inhibiting acetylated histone (H3/H4) interactions. Several small molecule inhibitors have been reported, which not only have high affinity, but also have high specificity to BET BDs. These developments make BET family proteins to be an important therapeutic targets, for major diseases such as cancer, neurological disorders, obesity and inflammation. Here, we review and discuss the structural biology of BET family BDs and their applications in major diseases.

  11. Best proportion of two Chinese herbal medicines on central muscular hypertonia rats to relax spasm and relieve pain: a screening process for Shaoyao Gancao decoction composed of Paeonia latiflora Pall.and Glycyrrhiza uralensis Fisch.%芍药甘草汤对中枢性肌张力增高大鼠解痉止痛最佳配比的筛选研究

    Institute of Scientific and Technical Information of China (English)

    杨旭; 王景霞; 张建军; 郑媛; 郭慧娟; 朱映黎; 罗武政

    2015-01-01

    目的 探讨不同配伍比例芍药甘草汤对中枢性肌张力增高大鼠的解痉止痛作用.方法 采用线拴法所致的脑卒中恢复期痉挛性肌张力增高大鼠模型,以巴氯芬为对照,实验组分别给予芍药甘草汤1∶1、1.5∶1、3∶1、7∶1、24∶0 5个不同配伍比例,给药3周后测定其神经功能评分、肌张力、及痛阈的变化.结果 不同配伍比例的芍药甘草汤均有解痉止痛的作用,可不同程度的缓解卒中后痉挛状态,但对于不同指标其最佳比例有所不同.其改善神经行为障碍的最佳比例是1∶1;降低肌张力的最佳比例是3∶1;对疼痛耐受性的最佳比例为7∶1.结论 芍药甘草汤对于中枢损伤所致的痉挛性肌张力增高有很好的柔筋止痛作用,综合判断其解痉止痛的最佳比例是3∶1.

  12. Impact of salt stress on the features and activities of root system for three desert halophyte species in their seedling stage

    Institute of Scientific and Technical Information of China (English)

    YI LiangPeng; MA Jian; LI Yan

    2007-01-01

    Linkage between belowground and aboveground sections of ecological system is mainly depending on root system. But root system is the parts of plant that people less understand. The absorption function of root system is closely related to their morphology and activity. Moreover root system can interact with the environmental stress under the adverse situation, and adjust its system to take adaptation responses in morphology and physiology to strengthen its survival chance. This research is focused on three desert halophyte species of H. ammodendron (C.A.Mey.) Bge., S. physophora Pall., and S.nitraria Pall. under solution culture, to study the differences of their root system morphology and activity in the seedling stage under varying salt concentration conditions. The study results show that: A certain salt concentration can promote development of these three halophytes; but rather high salt concentration will restrain their growth, in particular inhibit the root system development. Under the same salt concentration condition, S. nitraria Pall. grows fast and accumulates the largest amount of biomass. Under relatively low salt concentration, the length of axial root and the total length of root system of these three halophyte species are all increased; and compared to the checking samples, S.physophora Pall. occupies the top place of root system growth, but the high salt concentration will restrain the increase of total root length; among them, the impact intensity on S. physophora Pall. is lighter than to H. ammodendron (C.A.Mey.) Bge. and S. nitraria Pall. is lighter; the salinity does not bring distinct influence on the average diameter of root system of these three plant species, but trends to reducing the size; under the solution culture conditions, the middle and lower parts of the axial root of H. ammodendron (C.A.Mey.) Bge. and S. physophora Pall. are rather equally distributed, but the central zone of S. nitraria Pall. root system is more significantly

  13. The Yin and Yang of human beta defensins in health and disease

    Directory of Open Access Journals (Sweden)

    Aaron eWeinberg

    2012-10-01

    Full Text Available Rapidly evolving research examining the extended role of human beta-defensins (hBDs in chemoattraction, innate immune-mediated response and promotion of angiogenesis suggest that the collective effects of hBDs extend well beyond their antimicrobial mechanism(s. Indeed, the numerous basic cellular functions associated with hBDs demonstrate that these peptides have dual impact on health, as they may be advantageous under certain conditions, but potentially detrimental in others. The consequences of these functions are reflected in the overexpression of hBDs in diseases, such as psoriasis, and recently the association of hBDs with pro-tumoral signaling. The mechanisms regulating hBD response in health and disease are still being elucidated. Clearly the spectrum of function now attributed to hBD regulation identifies these molecules as important cellular regulators, whose appropriate expression is critical for proper immune surveillance; i.e., expression of hBDs in proximity to areas of cellular dysregulation may inadvertently exacerbate disease progression. Understanding the mechanism(s that regulate contextual signaling of hBDs is an important area of concentration in our laboratories. Using a combination of immunologic, biochemical and molecular biologic approaches, we have identified signaling pathways associated with hBD promotion of immune homeostasis and have begun to dissect the inappropriate role that beta-defensins may assume in disease.

  14. Nanoencapsulated budesonide in self-stratified polyurethane-polyurea nanoparticles is highly effective in inducing human tolerogenic dendritic cells.

    Science.gov (United States)

    Flórez-Grau, Georgina; Rocas, Pau; Cabezón, Raquel; España, Carolina; Panés, Julián; Rocas, Josep; Albericio, Fernando; Benítez-Ribas, Daniel

    2016-09-25

    The design of innovative strategies to selectively target cells, such antigen-presenting cells and dendritic cells, in vivo to induce immune tolerance is gaining interest and relevance for the treatment of immune-mediated diseases. A novel loaded-nanosystem strategy to generate tolerogenic dendritic cells (tol-DCs) was evaluated. Hence budesonide (BDS) was encapsulated in multiwalled polyurethane-polyurea nanoparticles (PUUa NPs-BDS) based on self-stratified polymers by hydrophobic interactions at the oil-water interface. DCs treated with encapsulated BDS presented a prominent downregulation of costimulatory molecules (CD80, CD83 and MHCII) and upregulation of inhibitory receptors. Moreover, DCs treated with these PUUa NPs-BDS also secreted large amounts of IL-10, a crucial anti-inflammatory cytokine to induce tolerance, and inhibited T lymphocyte activation in a specific manner compared to those cells generated with free BDS. These results demonstrate that PUUa NPs-BDS are a highly specific and efficient system through which to induce DCs with a tolerogenic profile. Given the capacity of PUUa NPs-BDS, this delivery system has a clear advantage for translation to in vivo studies.

  15. 至简 至美 至动听——harman/kardon BDS系列蓝光家庭影院系统上市

    Institute of Scientific and Technical Information of China (English)

    方懿

    2011-01-01

    2011年6月,全球领先的音响产品制造商啥曼集团将推出三款蓝光家庭影院系统——harman/kardon BDS 800,BDS 600与BDS400。BDS系列产品设计简约流畅,操作便捷易上手,让你在家中就可轻松享受豪华影院般的震撼音效。

  16. 哈曼献礼:家庭专业影院新风暴——harman/kardon BDS系列蓝光家庭影院系统

    Institute of Scientific and Technical Information of China (English)

    2011-01-01

    在家中就可轻松享受豪华影院般的震撼音效,这是每个对影音有高要求的人都在追求的梦想·全球领先的音响产品制造商哈曼集团全新推出的三款蓝光家庭影院系统——harman/kardon BDS 800-BDS 600与BDS 400·让我们梦想成真。

  17. Studies on a New Random Packing-Plum Flower Mini Ring%新一代的乱堆填料——梅花扁环

    Institute of Scientific and Technical Information of China (English)

    费维扬; 孙兰义; 郭庆丰

    2002-01-01

    The hydrodynamics and mass transfer of Plum Flower Mini Ring (PFMR), Pall Ring and Intalox Saddle were studied in a 600 mm diameter column with air-oxygen-water system over a wide range of liquid loads. It was shown fiom the experiments that PFMR had much lower resistance, larger throughput and higher mass transfer efficiency than Pall Ring and Intalox Saddle. It was clear from the comparison that existing equations could not predict the performance of packings very well at high liquid loads. Therefore, new semi-empirical equations of pressure drop, flooding gas velocity and height of transfer unit (HTU) were proposed based on the experimental data.

  18. Accretion and Outflow Activity in Brown Dwarfs

    CERN Document Server

    Riaz, B

    2013-01-01

    An investigation of the magnetospheric accretion and outflow signatures in sub-stellar objects is a natural extension of similar studies conducted on classical T Tauri stars (CTTS), and helps understand if brown dwarfs (BDs) follow the same formation mechanism as stars. Over the past decade, evidence for accretion in very low-mass stars (VLMs) and BDs has been accumulated using various techniques, which indicates that the overall accretion characteristics are continuous across the sub-stellar boundary. Outflow activity in VLMs and BDs has been confirmed based on spectro-astrometry of forbidden emission lines observed in the optical, and in millimetre continuum images of CO J=2-1 emission. This review summarizes the past and current state of observational work on accretion and outflow activity in VLMs and BDs, particularly with the advent of new instruments such as VLT/X-Shooter which has allowed the study of several accretion and outflow indicators over a wider wavelength range.

  19. Analysis of Beidou CORS Real Time Dynamic Positioning Accuracy Experiment%北斗CORS实时动态差分定位精度实验分析

    Institute of Scientific and Technical Information of China (English)

    张秀斌

    2016-01-01

    目前,兼容北斗导航卫星系统(BDS)的中山市连续卫星定位服务系统(ZSCORS)已经建成,分析ZSCORS环境下的BDS、GPS、BDS/GPS的实时动态差分定位精度很有必要.本文选择12个C级GPS控制点进行精度测试,分别采集BDS、GPS及BDS/GPS组合信号观测值,并进行统计分析,在ZSCORS实时动态差分定位环境下,BDS精度与GPS相当,BDS/GPS组合精度和效率明显高于BDS、GPS.

  20. Solenoid and Synchrotron radiation effects in CLIC

    CERN Document Server

    Dalena, B; Tomás, R; Angal-Kalinin, D

    2010-01-01

    The emission of Synchrotron Radiation in the CLIC BDS is one of the major limitations of the machine performance. An extensive revision of this phenomenon is presented with special emphasis on the Interaction point (IP) solenoid.

  1. 5th China Satellite Navigation Conference

    CERN Document Server

    Jiao, Wenhai; Wu, Haitao; Lu, Mingquan

    2014-01-01

    China Satellite Navigation Conference (CSNC) 2014 Proceedings presents selected research papers from CSNC2014, held on 21-23 May in Nanjing, China. The theme of CSNC2014 is 'BDS Application: Innovation, Integration and Sharing'. These papers discuss the technologies and applications of the Global Navigation Satellite System (GNSS), and the latest progress made in the China BeiDou System (BDS) especially. They are divided into 9 topics to match the corresponding sessions in CSNC2014, which broadly covered key topics in GNSS. Readers can learn about the BDS and keep abreast of the latest advances in GNSS techniques and applications.  SUN Jiadong is the Chief Designer of the Compass/ BDS, and the Academician of Chinese Academy of Sciences (CAS); JIAO Wenhai is a researcher at China Satellite Navigation Office; WU Haitao is a professor at Navigation Headquarters, CAS; LU Mingquan is a professor at Department of Electronic Engineering of Tsinghua University.

  2. Long-term repeated biodesulfurization by immobilized Rhodococcus erythropolis KA2-5-1 cells

    Energy Technology Data Exchange (ETDEWEB)

    Naito, M.; Kawamoto, T.; Tanaka, A. [Kyoto Univ., Yoshida (Japan). Dept. of Synthetic Chemistry and Biological Chemistry; Fujino, K.; Kobayashi, M.; Maruhashi, K. [Advanced Technology and Research Inst., Petroleum Energy Center, Shizuoka (Japan)

    2001-07-01

    In this study, biodesulfurization (BDS) was carried out using immobilized Rhodococcus erythropolis KA2-5-1 in n-tetradecane containing dibenzothiophene (DBT) as a model oil (n-tetradecane/immobilized cell biphasic system). The cells were immobilized by entrapping them with calcium alginate, agar, photo-crosslinkable resin prepolymers (ENT-4000 and ENTP-4000), and urethane prepolymers (PU-3 and PU-6); and it was found that ENT-4000-immobilized cells had the highest DBT desulfurization activity in the model oil system without leakage of cells from the support. Furthermore, ENT-4000-immobilized cells could catalyze BDS repeatedly in this system for more than 900 h with reactivation; and recovery of both the biocatalyst and the desulfurized model oil was easy. This study would give a solution to the problems in BDS, such as the troublesome process of recovering desulfurized oil and the short life of BDS biocatalysts. (orig.)

  3. A MATLAB-Based Boundary Data Simulator for Studying the Resistivity Reconstruction Using Neighbouring Current Pattern

    OpenAIRE

    Tushar Kanti Bera; Nagaraju, J.

    2013-01-01

    Phantoms are essentially required to generate boundary data for studying the inverse solver performance in electrical impedance tomography (EIT). A MATLAB-based boundary data simulator (BDS) is developed to generate accurate boundary data using neighbouring current pattern for assessing the EIT inverse solvers. Domain diameter, inhomogeneity number, inhomogeneity geometry (shape, size, and position), background conductivity, and inhomogeneity conductivity are all set as BDS input variables. D...

  4. Improvement of Biodesulfurization Rate of Alginate Immobilized Rhodococcus erythropolis R1

    OpenAIRE

    Derikvand, Peyman; Etemadifar, Zahra

    2014-01-01

    Background: Sulfur oxides released from the burning of oil causes severe environmental pollution. The sulfur can be removed via the 4S pathway in biodesulfurization (BDS). Immobilization approaches have been developed to prevent cell contamination of oil during the BDS process. Objectives: The encapsulation of Rhodococcus erythropolis R1 in calcium alginate beads was studied in order to enhance conversion of dibenzothiophene (DBT) to 2-hydroxy biphenyl (2-HBP) as the final product. Also the e...

  5. Early life stress perturbs the maturation of microglia in the developing hippocampus.

    Science.gov (United States)

    Delpech, Jean-Christophe; Wei, Lan; Hao, Jin; Yu, Xiaoqing; Madore, Charlotte; Butovsky, Oleg; Kaffman, Arie

    2016-10-01

    Children exposed to abuse or neglect show abnormal hippocampal development and similar findings have been reported in rodent models. Using brief daily separation (BDS), a mouse model of early life stress, we previously showed that exposure to BDS impairs hippocampal function in adulthood and perturbs synaptic maturation, synaptic pruning, axonal growth and myelination in the developing hippocampus. Given that microglia are involved in these developmental processes, we tested whether BDS impairs microglial activity in the hippocampus of 14 (during BDS) and 28-day old mice (one week after BDS). We found that BDS increased the density and altered the morphology of microglia in the hippocampus of 14-day old pups, effects that were no longer present on postnatal day (PND) 28. Despite the normal cell number and morphology seen at PND28, the molecular signature of hippocampal microglia, assessed using the NanoString immune panel, was altered at both ages. We showed that during normal hippocampal development, microglia undergo significant changes between PND14 and PND28, including reduced cell density, decreased ex vivo phagocytic activity, and an increase in the expression of genes involved in inflammation and cell migration. However, microglia harvested from the hippocampus of 28-day old BDS mice showed an increase in phagocytic activity and reduced expression of genes that normally increase across development. Promoter analysis indicated that alteration in the transcriptional activity of PU.1, Creb1, Sp1, and RelA accounted for most of the transcriptional changes seen during normal microglia development and for most of the BDS-induced changes at PND14 and PND28. These findings are the first to demonstrate that early life stress dysregulates microglial function in the developing hippocampus and to identify key transcription factors that are likely to mediate these changes.

  6. NCBI nr-aa BLAST: CBRC-PHAM-01-1276 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-PHAM-01-1276 sp|Q9BDS8|CCR3_MACFA RecName: Full=C-C chemokine receptor type 3; Short=C-C CKR-3; Short...=CC-CKR-3; Short=CCR-3; Short=CCR3; Short=CKR3; AltName: CD_antigen=CD193 gb|AAK25739.1| chemokine receptor CCR3 [Macaca fascicularis] Q9BDS8 0.0 97% ...

  7. A MATLAB-Based Boundary Data Simulator for Studying the Resistivity Reconstruction Using Neighbouring Current Pattern

    Directory of Open Access Journals (Sweden)

    Tushar Kanti Bera

    2013-01-01

    Full Text Available Phantoms are essentially required to generate boundary data for studying the inverse solver performance in electrical impedance tomography (EIT. A MATLAB-based boundary data simulator (BDS is developed to generate accurate boundary data using neighbouring current pattern for assessing the EIT inverse solvers. Domain diameter, inhomogeneity number, inhomogeneity geometry (shape, size, and position, background conductivity, and inhomogeneity conductivity are all set as BDS input variables. Different sets of boundary data are generated by changing the input variables of the BDS, and resistivity images are reconstructed using electrical impedance tomography and diffuse optical tomography reconstruction software (EIDORS. Results show that the BDS generates accurate boundary data for different types of single or multiple objects which are efficient enough to reconstruct the resistivity images for assessing the inverse solver. It is noticed that for the BDS with 2048 elements, the boundary data for all inhomogeneities with a diameter larger than 13.3% of that of the phantom are accurate enough to reconstruct the resistivity images in EIDORS-2D. By comparing the reconstructed image with an original geometry made in BDS, it would be easier to study the inverse solver performance and the origin of the boundary data error can be identified.

  8. A MATLAB-Based Boundary Data Simulator for Studying the Resistivity Reconstruction Using Neighbouring Current Pattern.

    Science.gov (United States)

    Bera, Tushar Kanti; Nagaraju, J

    2013-01-01

    Phantoms are essentially required to generate boundary data for studying the inverse solver performance in electrical impedance tomography (EIT). A MATLAB-based boundary data simulator (BDS) is developed to generate accurate boundary data using neighbouring current pattern for assessing the EIT inverse solvers. Domain diameter, inhomogeneity number, inhomogeneity geometry (shape, size, and position), background conductivity, and inhomogeneity conductivity are all set as BDS input variables. Different sets of boundary data are generated by changing the input variables of the BDS, and resistivity images are reconstructed using electrical impedance tomography and diffuse optical tomography reconstruction software (EIDORS). Results show that the BDS generates accurate boundary data for different types of single or multiple objects which are efficient enough to reconstruct the resistivity images for assessing the inverse solver. It is noticed that for the BDS with 2048 elements, the boundary data for all inhomogeneities with a diameter larger than 13.3% of that of the phantom are accurate enough to reconstruct the resistivity images in EIDORS-2D. By comparing the reconstructed image with an original geometry made in BDS, it would be easier to study the inverse solver performance and the origin of the boundary data error can be identified.

  9. Tidal evolution of planets around brown dwarfs

    CERN Document Server

    Bolmont, Emeline; Leconte, Jérémy

    2011-01-01

    The tidal evolution of planets orbiting brown dwarfs (BDs) presents an interesting case study because BDs' terrestrial planet forming region is located extremely close-in. In fact, the habitable zones of BDs range from roughly 0.001 to 0.03 AU and for the lowest-mass BDs are located interior to the Roche limit. In contrast with stars, BDs spin up as they age. Thus, the corotation distance moves inward. This has important implications for the tidal evolution of planets around BDs. We used a standard equilibrium tidal model to compute the orbital evolution of a large ensemble of planet-BD systems. We tested the effect of numerous parameters such as the initial semi-major axis and eccentricity, the rotation period of the BD, the masses of both the BD and planet, and the tidal dissipation factors. We find that all planets that form at or beyond the corotation distance and with initial eccentricities smaller than \\sim 0.1 are repelled from the BD. Some planets initially interior to corotation can survive if their ...

  10. Comprehensive Comparisons of Satellite Data, Signals, and Measurements between the BeiDou Navigation Satellite System and the Global Positioning System

    Directory of Open Access Journals (Sweden)

    Shau-Shiun Jan

    2016-05-01

    Full Text Available The Chinese BeiDou navigation satellite system (BDS aims to provide global positioning service by 2020. The combined use of BDS and Global Positioning System (GPS is proposed to provide navigation service with more stringent requirements. Actual satellite data, signals and measurements were collected for more than one month to analyze the positioning service qualities from both BDS and GPS. In addition to the conversions of coordinate and timing system, five data quality analysis (DQA methods, three signal quality analysis (SQA methods, and four measurement quality analysis (MQA methods are proposed in this paper to improve the integrated positioning performance of BDS and GPS. As shown in the experiment results, issues related to BDS and GPS are resolved by the above proposed quality analysis methods. Thus, the anomalies in satellite data, signals and measurements can be detected by following the suggested resolutions to enhance the positioning performance of the combined use of BDS and GPS in the Asia Pacific region.

  11. Using BeiDou system for precise positioning in central Europe

    Science.gov (United States)

    Kwasniak, Dawid; Cellmer, Slawomir; Nowel, Krzysztof

    2016-04-01

    In 2012 the Chinese navigation satellite system called BeiDou System (BDS) has reached the regional operational capabilities over the area of East Asia. Currently the BDS system consists of 5 medium orbit satellites MEO, 6 geosynchronous satellites IGSO and 5 geostationary satellites GEO and provides regional coverage by its navigation signals. Also in Europe BDS satellites can be used to determine position. In 2015 the third phase of BSD system development has started, aimed at providing global coverage and compatibility with other GNSS systems. As a result, BDS will broadcast signals at the same frequency as GPS L1 and L5 and Galileo E1, E5a and E5b. In the presented research we carried out relative positioning using the MAFA method. This was the first time when this method was applied to process BDS signals. The results show that it is possible to obtain precise position in central Europe using BDS signals only. However, with its current constellation, this is not possible 24/7, but in periodic time windows.

  12. Social Media Rhetoric of the Transnational Palestinian-led Boycott, Divestment, and Sanctions Movement

    Directory of Open Access Journals (Sweden)

    Jennifer Hitchcock

    2016-02-01

    Full Text Available This article uses rhetorical analysis to determine the effectiveness and characteristics of social media usage by the Boycott, Divestment, and Sanctions (BDS movement targeting Israel. Hundreds of local student, community, and religious groups in the United States use social media platforms such as Twitter and Facebook to promote BDS discourse and organize local BDS-related events. Even though social media platforms are important for an international movement composed of a very dispersed population, with millions of Palestinians also living under military occupation, the history of traditional media use during the First Intifada also suggests that social media are not necessary for mobilizing Palestinians at the local level. A preliminary rhetorical analysis of several BDS-related Facebook pages and Twitter accounts reveals that the BDS movement’s social media usage functions similarly in some ways to other contemporary mass movements by facilitating on-the-ground actions and delivering useful information to supporters. BDS movement social media discourse, however, does not establish the same level of emotional connection or interactivity with audiences as some other recent movements have, but these limitations can be partly explained by the unique political, material, and rhetorical constraints of the situation.

  13. Simulating Conditional Deterministic Predictability within Ocean Frontogenesis

    Science.gov (United States)

    2014-03-26

    in small patches as would be expected from coincidental correlation. The areas of maximal correlation are the area south of the Kuroshio and west of...dx.doi.org/10.1029/2004JC002712. Pallàs-Sanz, E., Johnston , T.M.S., Rudnick, D.L., 2010. Frontal dynamics in a California current system shallow front: 1

  14. Eesti Energia nõukogu liikmed Jaotusvõrgu hinnatõusutaotlust kommenteerima ei kipu / Katre Pilvinski

    Index Scriptorium Estoniae

    Pilvinski, Katre

    2010-01-01

    Eesti Energia nõukogu liige Kalle Palling kommenteerib peaminister Andrus Ansipi öeldut, et Eesti Energia investeeringud tuleb üle vaadata. Nõukogu liikme Rein Kilgi sõnul tunduvad talle rünnakud Eesti Energia vastu ülekohtused

  15. Global exchange and accumulation of non-native plants

    NARCIS (Netherlands)

    Kleunen, Van Mark; Dawson, Wayne; Essl, Franz; Pergl, Jan; Winter, Marten; Weber, Ewald; Kreft, Holger; Weigelt, Patrick; Kartesz, John; Nishino, Misako; Antonova, Liubov A.; Barcelona, Julie F.; Cabezas, Francisco J.; Cárdenas, Dairon; Cárdenas-Toro, Juliana; Castaño, Nicolás; Chacón, Eduardo; Chatelain, Cyrille; Ebel, Aleksandr L.; Figueiredo, Estrela; Fuentes, Nicol; Groom, Quentin J.; Henderson, Lesley; Inderjit,; Kupriyanov, Andrey; Masciadri, Silvana; Meerman, Jan; Morozova, Olga; Moser, Dietmar; Nickrent, Daniel L.; Patzelt, Annette; Pelser, Pieter B.; Baptiste, María P.; Poopath, Manop; Schulze, Maria; Seebens, Hanno; Shu, Wen Sheng; Thomas, Jacob; Velayos, Mauricio; Wieringa, Jan J.; Pyšek, Petr

    2015-01-01

    <p>All around the globe, humans have greatly altered the abiotic and biotic environment with ever-increasing speed. One defining feature of the Anthropocene epoch is the erosion of biogeographical barriers by human-mediated dispersal of species into new regions, where they can naturalize and cause e

  16. Kontseptuaalne ja liikumispõhine nüüdistants Täiskuu tantsufestivalil Soomes / Evelin Lagle

    Index Scriptorium Estoniae

    Lagle, Evelin, 1986-

    2010-01-01

    Tantsufestivalist "Täudenkuun Tanssit" (Full Moon Dance Festival). Tantsulavastustest - Tommi Kitti "Riff", Jyrki Karttuneni "Situation Room", Kenneth Kvanströmi "Destruction Song", Liisa Petti "Mabel or the Gueen of Bones", Elina Pirineni "A Friend of the Pianist", Johanna Tuukkaneni "Outstanding Performance" ja Palle Granhoj sooloetendus "(...It's a Very Big Secret...)"

  17. Supported bimetallic nano-alloys as highly active catalysts for the one-pot tandem synthesis of imines and secondary amines from nitrobenzene and alcohols

    NARCIS (Netherlands)

    Meenakshisundaram, Sankar; He, Qian; Dawson, Simon; Nowicka, Ewa; Lu, Li; Bruijnincx, Pieter C. A.; Beale, Andrew M.; Kiely, Christopher J.; Weckhuysen, Bert M.

    2016-01-01

    The synthesis and functionalization of imines and amines are key steps in the preparation of many fine chemicals and for pharmaceuticals in particular. Traditionally, metal complexes are used as homogeneous catalysts for these organic transformations. Here we report gold-palladium and ruthenium-pall

  18. Self-Determination and Bilingualism

    Science.gov (United States)

    Landry, Rodrigue; Allard, Real; Deveau, Kenneth

    2009-01-01

    This article focuses on additive bilingualism for minority group children, more specifically the development of strong literacy skills in English and in the children's language. The personal autonomization language learning (PALL) model is presented. It specifies eight testable hypotheses. Self-determination theory (SDT) is central in the PALL…

  19. Väikeste ridamajade rida Kloostrimetsas = A Row of Little Row Houses in Kloostrimetsa / Urmas Oja

    Index Scriptorium Estoniae

    Oja, Urmas, 1981-2012

    2003-01-01

    Neljast ridaelamust, millest kaks on propjekteerinud Ado Eigi (Ado Eigi Arhitektuuribüroo, konstruktsioonid: Uno Pall, projekt 2002, valminud 2003), ühe Ott Kadarik ja Mihkel Tüür (COO Arhitektid, projekt 2002, valminud 2003) ning ühe arhitektuuribüroo Kosmos (valminud 2004). Sisevaade, 6 välisvaadet, 5 korruste plaani

  20. Hydrodynamic behaviour of a gas—solid counter-current packed column at trickle flow

    NARCIS (Netherlands)

    Roes, A.W.M.; Swaaij, van W.P.M.

    1979-01-01

    Trickle flow of a more or less fluidized catalyst through a packed column is a promising new gas—solid counter-current operation. The hydrodynamic, behaviour of such a column, filled with dumped PALL rings, has been investigated, while some results have been obtained with RASCHIG rings and cylindric

  1. Obama and Cameron’s Ping-pong Diplomacy Show

    Institute of Scientific and Technical Information of China (English)

    李新

    2011-01-01

    They seemed like best mates. Every time one of them got a point,they did a high fiv(e击掌相庆). The men were the British Prime Minister,David Cameron, and the President of the USA, Barack Obama.The palling around(结伴玩耍)took place during Mr. Obama’s state

  2. Eestlaste pension kinnisvaraturu meelevallas / Anne Oja

    Index Scriptorium Estoniae

    Oja, Anne, 1970-

    2007-01-01

    Ilmunud ka: Delovõje Vedomosti 22. aug. lk. 6. Eesti pensionifondid on kinnisvarasse paigutanud umbes miljard krooni. Kinnisvarafirmade võlakirjade hind võib kujuneda madalaks. Pankade kommentaarid. Vt. samas: Tulevased pensionärid magavad rahulikult. Tabel: Pensionifondide investeeringud kinnisvarasse. Kommenteerivad: Ingmar Mattus, Kalle Palling, Karoli Hindriks, Pertti Rahnel, Andre Nõmm, Urmas Laur, Kristjan Lepik. Kommentaarid ainult eestikeelse art. juures

  3. TWAS Participating in Social Advancement --An Interview with Prof. Jacob Palis

    Institute of Scientific and Technical Information of China (English)

    2012-01-01

    "We should have the promotion of research and development in the industry, and for that scientists should be hired ... Science not only should be promoted by its intellectual challenges of understanding nature, but also should be towards applications in benefit of Society, without reservations that science would be less noble because of that." Prof. Jacob Palls.

  4. Validation of a real-time PCR based method for detection of Clostridium botulinum types C, D and their mosaic variants C-D and D-C in a multicenter collaborative trial

    NARCIS (Netherlands)

    Woudstra, C.; Skarin, H.; Anniballi, F.; Auricchio, B.; Medici, De D.; Bano, L.; Drigo, I.; Hansen, T.; Löfström, Ch.; Hamidjaja, R.; Rotterdam, van B.; Koene, M.G.J.

    2013-01-01

    Two real-time PCR arrays based on the GeneDisc(®) cycler platform (Pall-GeneDisc Technologies) were evaluated in a multicenter collaborative trial for their capacity to specifically detect and discriminate Clostridium botulinum types C, D and their mosaic variants C-D and D-C that are associated wit

  5. Validation of a real-time PCR based method for detection of Clostridium botulinum types C, D and their mosaic variants C-D and D-C in a multicenter collaborative trial

    DEFF Research Database (Denmark)

    Woudstra, C.; Skarin, H.; Anniballi, F.

    2013-01-01

    Two real-time PCR arrays based on the GeneDisc® cycler platform (Pall-GeneDisc Technologies) were evaluated in a multicenter collaborative trial for their capacity to specifically detect and discriminate Clostridium botulinum types C, D and their mosaic variants C-D and D-C that are associated...

  6. Monoterpene Glycosides from the Roots of Paeonia lactiflora

    Institute of Scientific and Technical Information of China (English)

    Xiao Ling WANG; Wei JIAO; Xun LIAO; Shu Ling PENG; Li Sheng DING

    2006-01-01

    A new monoterpene glycoside, together with nine known ones, 3-O-methylpaeoniflorin,mudanpioside J, paeoniflorin, benzoylpaeoniflorin, oxypaeoniflorin, benzoyloxypaeoniflorin,oxybenzoylpaeoniflorin, albiflorin and lactiflorin, was isolated from the roots of Paeonia lactiflora Pall.. The structure of the new compound was elucidated as galloylalbiflorin by the spectroscopic evidence including ESI-MS, 1D- and 2D-NMR spectra.

  7. Dihydrochalcone glycosides from Oxytropis myriophylla

    OpenAIRE

    2011-01-01

    Abstract Chemical investigations of the 70% alcohol extract of Oxytropis myriophylla (Pall.) DC. (Leguminosae) have afforded the new natural product neohesperidin dihydrochalcone (1) and the known phloretin-4'-O-β-D-glucopyranoside (2), which was the first reported from the genus Oxytropis. This paper reports the isolation and full spectroscopic characterization of compounds 1 and 2 by NMR, UV, IR and MS data.

  8. Conference on Policies on Pesticide Use by Local and Regional Authorities 25th April 2006 Wageningen UR, Wageningen, The Netherlands

    NARCIS (Netherlands)

    Graugaard, S.; Jensen, K.; Melander, B.; Kempenaar, C.

    2006-01-01

    Table of Contents: 1. Inventory of policies on pesticide use by local and regional authorities in the 7 project countries (DE, DK, FI, LV, NL, SE, UK) [Palle Kristoffersen & Anne Merete Rask (DK)]; 2. Dutch policy regarding pesticide use on hard surfaces [Wilbert van Zeventer (NL)]; 3. Handling

  9. Individual Bromodomains of Polybromo-1 Contribute to Chromatin Association and Tumor Suppression in Clear Cell Renal Carcinoma.

    Science.gov (United States)

    Porter, Elizabeth G; Dykhuizen, Emily C

    2017-02-17

    The architecture of chromatin is governed, in part, by ATP-dependent chromatin remodelers. These multiprotein complexes contain targeting domains that recognize post-translational marks on histones. One such targeting domain is the bromodomain (BD), which recognizes acetyl-lysines and recruits proteins to sites of acetylation across the genome. Polybromo1 (PBRM1), a subunit of the Polybromo-associated BRG1- or hBRM-associated factors (PBAF) chromatin remodeler, contains six tandem BDs and is frequently mutated in clear cell renal cell carcinoma (ccRCC). Mutations in the PBRM1 gene often lead to the loss of protein expression; however, missense mutations in PBRM1 have been identified and tend to cluster in the BDs, particularly BD2 and BD4, suggesting that individual BDs are critical for PBRM1 function. To study the role of these six BDs, we inactivated each of the six BDs of PBRM1 and re-expressed these mutants in Caki2 cells (ccRCC cells with the loss of function mutation in PBRM1). Four of the six BDs abrogated PBRM1 tumor suppressor function, gene regulation, and chromatin affinity with the degree of importance correlating strongly to the rate of missense mutations in patients. Furthermore, we identified BD2 as the most critical for PBRM1 and confirmed BD2-mediated association to histone H3 peptides acetylated at lysine 14 (H3K14Ac), validating the importance of this specific acetylation mark for PBRM1 binding. From these data, we conclude that four of the BDs act together to target PBRM1 to sites on chromatin; when a single BD is mutated, PBRM1 no longer controls gene expression properly, leading to increased cell proliferation.

  10. Three novel Anas platyrhynchos avian β-defensins, upregulated by duck hepatitis virus, with antibacterial and antiviral activities.

    Science.gov (United States)

    Ma, Deying; Lin, Lijuan; Zhang, Kexin; Han, Zongxi; Shao, Yuhao; Liu, Xiaoli; Liu, Shengwang

    2011-10-01

    Three novel Anas platyrhynchos avian β-defensins (Apl_AvBDs), Apl_AvBD4, 7 and 12, were identified successfully and characterized in tissues from Peking ducks in the present study. The cDNA fragment of Apl_AvBD4 contained 171 bp, and encoded 56 amino acids. The complete nucleotide sequences of Apl_AvBD7 and 12 contained 204 bp and 198 bp open reading frames, which encoded 67 and 65 amino acids, respectively. Both recombinant and synthetic forms of the three Apl_AvBDs showed antibacterial activity against most of the bacteria investigated, including Gram-negative and Gram-positive bacteria, except for Salmonella choleraesuis. In addition, the antibacterial activity of all the three Apl_AvBDs decreased significantly in 150 mM NaCl. Significant antiviral activity of the three Apl_AvBDs was shown against duck hepatitis virus (DHV). However, none of the Apl_AvBDs showed significant hemolytic activity. Additionally, the expressions of the three Apl_AvBDs in response to DHV infection was highly variable, and significant upregulation of Apl_AvBD7 in liver was found in response to infection at different time points. Expression of Apl_AvBD4 in thymus, and of Apl_AvBD7 in bone marrow was induced in a time-dependent fashion by DHV infection. In contrast, expression of Apl_AvBD12 was found to be significantly decreased, and was hard to detect in cecal tonsil, spleen, bursa of Fabricius, and thymus of ducks at some time points after DHV infection. The present results demonstrate that Apl_AvBDs play vital roles in the immune response of ducks against bacterial and viral pathogens.

  11. Accuracy analysis of continuous deformation monitoring using BeiDou Navigation Satellite System at middle and high latitudes in China

    Science.gov (United States)

    Jiang, Weiping; Xi, Ruijie; Chen, Hua; Xiao, Yugang

    2017-02-01

    As BeiDou Navigation Satellite System (BDS) has been operational in the whole Asia-Pacific region, it means a new GNSS system with a different satellite orbit structure will become available for deformation monitoring in the future. Conversely, GNSS deformation monitoring data are always processed with a regular interval to form displacement time series for deformation analysis, where the interval can neither be too long from the time perspective nor too short from the precision of determined displacements angle. In this paper, two experimental platforms were designed, with one being at mid-latitude and another at higher latitude in China. BDS data processing software was also developed for investigating the accuracy of continuous deformation monitoring using current in-orbit BDS satellites. Data over 20 days at both platforms were obtained and were processed every 2, 4 and 6 h to generate 3 displacement time series for comparison. The results show that with the current in-orbit BDS satellites, in the mid-latitude area it is easy to achieve accuracy of 1 mm in horizontal component and 2-3 mm in vertical component; the accuracy could be further improved to approximately 1 mm in both horizontal and vertical directions when combined BDS/GPS measurements are employed. At higher latitude, however, the results are not as good as expected due to poor satellite geometry, even the 6 h solutions could only achieve accuracy of 4-6 and 6-10 mm in horizontal and vertical components, respectively, which implies that it may not be applicable to very high-precision deformation monitoring at high latitude using the current BDS. With the integration of BDS and GPS observations, however, in 4-h session, the accuracy can achieve 2 mm in horizontal component and 4 mm in vertical component, which would be an optimal choice for high-accuracy structural deformation monitoring at high latitude.

  12. Mindfulness and bodily distress.

    Science.gov (United States)

    Fjorback, Lone Overby

    2012-11-01

    We have created a mindfulness approach to treat patients who experience multiple, persistent, and disabling physical symptoms that cannot be explained by a well-defined medical or surgical condition. Randomized controlled trials in this area are few, and research is hampered by the lack of clear definitions. Bodily distress syndrome (BDS) or bodily stress is an empirically defined definition unifying various conditions such as fibromyalgia, chronic fatigue syndrome, and somatization disorder. In the present PhD, we explored whether patients suffering from BDS may be committed to mental training in the form of mindfulness therapy, which is a mindfulness program specifically targeted patients suffering from BDS. The theoretical model for including mindfulness training in the treatment of BDS is based on identified neurobiological impairments in these patients and the neurobiological improvements that mindfulness training may offer. BDS is a major public health issue possibly associated with the pathology of the immuno-endocrine and autonomic nervous system. BDS patients are often stigmatized, and effective treatment is rarely delivered, which leaves these patients isolated, left by themselves, vulnerable to potentially harming medical and/or alternative treatments. Accordingly, there is a need for non-harming practical tools that patients can learn to master so that they can improve the ability to take responsibility for their own health and wellbeing. Mindfulness-Based Stress Reduction (MBSR) is a group program that employs mindfulness practice to alleviate suffering associated with physical, psychosomatic, and psychiatric disorders. Mindfulness-Based Cognitive Therapy (MBCT) is designed to prevent depressive relapse. Paper I and II present systematic literature reviews only of randomized controlled trials on MBSR and MBCT. The effect of MBSR has been explored on fibromyalgia in three studies, none of them showed convincing results, but gave some indications as to

  13. Epidemiology of Birth Defects Based on a Birth Defect Surveillance System from 2005 to 2014 in Hunan Province, China.

    Directory of Open Access Journals (Sweden)

    Donghua Xie

    Full Text Available To describe the epidemiology of birth defects (BDs in perinatal infants in Hunan Province, China, between 2005 and 2014.The BD surveillance data of perinatal infants (for stillbirth, dead fetus or live birth between 28 weeks of gestation and 7 days after birth were collected from 52 registered hospitals of Hunan between 2005 and 2014. The prevalence rates of BDs with 95% confidence interval (CI and crude odds ratio (ORs were calculated to examine the associations of infant gender, maternal age, and region (urban vs rural with BDs.From 2005 to 2014, there were a total of 925413 perinatal infants of which 17753 had BDs, with the average prevalence of 191.84 per 10000 PIs (perinatal infants, showing a significant uptrend. The risks of BDs are higher in urban areas versus rural areas (OR = 1.20, in male infants versus female infants (OR = 1.19, and in mothers above age 35 versus those below age 35 (OR = 1.24. The main five types of BDs are Congenital heart defects (CHD, Other malformation of external ear (OMEE, Polydactyly, Congenital malformation of kidney (CMK, and Congenital talipes equinovarus (CTE. From 2005 to 2014, the prevalence rates (per 10000 PIs of CHD and CMK increased significantly from 22.56 to 74 (OR = 3.29, 95%CI: 2.65-4.11 and from 7.61 to 14.62 (OR = 1.92, 95%CI:1.30-2.84, respectively; the prevalence rates of congenital hydrocephalus and neural tube defects (NTDs decreased significantly from 11.8 to 5.29 (OR = 0.45, 95%CI: 0.31-0.65 and from 7.87 to 1.74 (OR = 0.22, 95%CI: 0.13-0.38, respectively.The prevalence rates of specific BDs in perinatal infants in Hunan have changed in the last decade. Urban pregnant women, male perinatal infants, and mothers above age 35 present different prevalence rates of BDs. Wider use of new diagnosis technology, improving the ability of monitoring, strengthening the publicity and education are important to reduce the prevalence of BDs.

  14. Microbial phytase addition resulted in a greater increase in phosphorus digestibility in dry-fed compared with liquid-fed non-heat-treated wheat-barley-maize diets for pigs.

    Science.gov (United States)

    Blaabjerg, K; Thomassen, A-M; Poulsen, H D

    2015-02-01

    The objective was to evaluate the effect of microbial phytase (1250 FTU/kg diet with 88% dry matter (DM)) on apparent total tract digestibility (ATTD) of phosphorus (P) in pigs fed a dry or soaked diet. Twenty-four pigs (65±3 kg) from six litters were used. Pigs were housed in metabolism crates and fed one of four diets for 12 days; 5 days for adaptation and 7 days for total, but separate collection of feces and urine. The basal diet was composed of wheat, barley, maize, soybean meal and no mineral phosphate. Dietary treatments were: basal dry-fed diet (BDD), BDD with microbial phytase (BDD+phy), BDD soaked for 24 h at 20°C before feeding (BDS) and BDS with microbial phytase (BDS+phy). Supplementation of microbial phytase increased ATTD of DM and crude protein (N×6.25) by 2 and 3 percentage units (Pphytase and soaking (P=0.02). This was due to a greater increase in ATTD of P by soaking of the diet containing solely plant phytase compared with the diet supplemented with microbial phytase: 35%, 65%, 44% and 68% for BDD, BDD+phy, BSD and BSD+phy, respectively. As such, supplementation of microbial phytase increased ATTD of P in the dry-fed diet, but not in the soaked diet. The higher ATTD of P for BDS compared with BDD resulted from the degradation of 54% of the phytate in BDS by wheat and barley phytases during soaking. On the other hand, soaking of BDS+phy did not increase ATTD of P significantly compared with BDD+phy despite that 76% of the phytate in BDS+phy was degraded before feeding. In conclusion, soaking of BDS containing solely plant phytase provided a great potential for increasing ATTD of P. However, this potential was not present when microbial phytase (1250 FTU/kg diet) was supplemented, most likely because soaking of BDS+phy for 24 h at 20°C did not result in a complete degradation of phytate before feeding.

  15. Detection of brown dwarf-like objects in the core of NGC3603

    CERN Document Server

    Spezzi, Loredana; De Marchi, Guido; Young, Erick T; Paresce, Francesco; Dopita, Michael A; Andersen, Morten; Panagia, Nino; Balick, Bruce; Bond, Howard E; Calzetti, Daniela; Carollo, C Marcella; Disney, Michael J; Frogel, Jay A; Hall, Donald N B; Holtzman, Jon A; Kimble, Randy A; McCarthy, Patrick J; O'Connell, Robert W; Saha, Abhijit; Silk, Joseph I; Trauger, John T; Walker, Alistair R; Whitmore, Bradley C; Windhorst, Rogier A

    2011-01-01

    We use near-infrared data obtained with the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope to identify objects having the colors of brown dwarfs (BDs) in the field of the massive galactic cluster NGC 3603. These are identified through use of a combination of narrow and medium band filters spanning the J and H bands, and which are particularly sensitive to the presence of the 1.3-1.5{\\mu}m H2O molecular band - unique to BDs. We provide a calibration of the relationship between effective temperature and color for both field stars and for BDs. This photometric method provides effective temperatures for BDs to an accuracy of {\\pm}350K relative to spectroscopic techniques. This accuracy is shown to be not significantly affected by either stellar surface gravity or uncertainties in the interstellar extinction. We identify nine objects having effective temperature between 1700 and 2200 K, typical of BDs, observed J-band magnitudes in the range 19.5-21.5, and that are strongly clustered towards the luminous...

  16. Dielectric response and novel electromagnetic modes in three-dimensional Dirac semimetal films

    Science.gov (United States)

    Kotov, O. V.; Lozovik, Yu. E.

    2016-06-01

    Using the Kubo formalism we have calculated the local dynamic conductivity of a bulk, i.e., three-dimensional (3D), Dirac semimetal (BDS). We obtain that at frequencies lower than Fermi energy the metallic response in a BDS film manifests in the existence of surface-plasmon polaritons, but at higher frequencies the dielectric response is dominated and it occurs that a BDS film behaves as a dielectric waveguide. At this dielectric regime we predict the existence inside a BDS film of novel electromagnetic modes, a 3D analog of the transverse electric waves in graphene. We also find that the dielectric response manifests as the wide-angle passband in the mid-infrared (IR) transmission spectrum of light incident on a BDS film, which can be used for the interferenceless omnidirectional mid-IR filtering. The tuning of the Fermi level of the system allows us to switch between the metallic and the dielectric regimes and to change the frequency range of the predicted modes. This makes BDSs promising materials for photonics and plasmonics.

  17. A CURRICULAR PARADIGM BASED UPON VEDIC EPISTEMOLOGY: AN APPROACH TO DEVELOPING THE WHOLE PERSON

    Directory of Open Access Journals (Sweden)

    Dr. Kumar LAXMAN

    2012-10-01

    Full Text Available The Bhaktivedanta Dharma School (BDS provides quality but yet affordable holistic education to the local Indonesian community in Bali. The school’s educational orientation is inspired by the Vedic (Hindu goals of fruition of knowledge (Vedanta or the essence of the Vedic scriptures and devotion (Bhakti to God (Krishna. The curriculum integrates the best of both the eastern and western approaches to enriching young minds. The strengths of both value systems are seen to be crucial in the all-round, dynamic development of children. Not only is academic excellence emphasized but character development and awareness of the higher spiritual purpose of life are also imparted to the kids. The role of the teacher extends beyond the taught curriculum and s/he plays a vital role in the character development of the child, through his or her own personal example. This paper examines the pedagogical effectiveness of the implemented framework of holistic education at BDS based upon the perceptions and experiences of the teachers working in the school. An ethnographic approach was employed as the main research methodology with participant observation and open-ended interviewing the primary means of data collection and analysis. A total of six teachers working at BDS were interviewed in this study. The findings of the study provide deeper insights on the differences between BDS and mainstream, traditional schools in terms of their structural and curricular characteristics and the key challenges participant teachers faced in orientating to the alternative learning culture of BDS.

  18. HABITABLE PLANETS ECLIPSING BROWN DWARFS: STRATEGIES FOR DETECTION AND CHARACTERIZATION

    Energy Technology Data Exchange (ETDEWEB)

    Belu, Adrian R.; Selsis, Franck; Raymond, Sean N.; Bolmont, Emeline [Universite de Bordeaux, LAB, UMR 5804, F-33270, Floirac (France); Palle, Enric [Instituto de Astrofisica de Canarias, E-38205 La Laguna (Spain); Street, Rachel [Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, Suite 102, Goleta, CA 93117 (United States); Sahu, D. K.; Anupama, G. C. [Indian Institute of Astrophysics, Koramangala, Bangalore 560034 (India); Von Braun, Kaspar [NASA Exoplanet Science Institute, California Institute of Technology, MC 100-22, Pasadena, CA 91125 (United States); Figueira, Pedro [Centro de Astrofisica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto (Portugal); Ribas, Ignasi, E-mail: belu@obs.u-bordeaux1.fr [Institut de Ciencies de l' Espai (CSIC-IEEC), Campus UAB, Facultat de Ciencies, Torre C5, parell, 2a pl., E-08193 Bellaterra (Spain)

    2013-05-10

    Given the very close proximity of their habitable zones, brown dwarfs (BDs) represent high-value targets in the search for nearby transiting habitable planets that may be suitable for follow-up occultation spectroscopy. In this paper, we develop search strategies to find habitable planets transiting BDs depending on their maximum habitable orbital period (P{sub HZ{sub out}}). Habitable planets with P{sub HZ{sub out}} shorter than the useful duration of a night (e.g., 8-10 hr) can be screened with 100% completeness from a single location and in a single night (near-IR). More luminous BDs require continuous monitoring for longer duration, e.g., from space or from a longitude-distributed network (one test scheduling achieved three telescopes, 13.5 contiguous hours). Using a simulated survey of the 21 closest known BDs (within 7 pc) we find that the probability of detecting at least one transiting habitable planet is between 4.5{sup +5.6}{sub -1.4}% and 56{sup +31}{sub -13}%, depending on our assumptions. We calculate that BDs within 5-10 pc are characterizable for potential biosignatures with a 6.5 m space telescope using {approx}1% of a five-year mission's lifetime spread over a contiguous segment only one-fifth to one-tenth of this duration.

  19. Monitoring and evaluation algorithm of GNSS signal in space availability

    Science.gov (United States)

    Wang, Ershen; Zhang, Qing; Tong, Gang; Qu, Pingping; Pang, Tao

    2017-02-01

    In civil aviation and other navigation application fields, the availability of Global Navigation Satellite System (GNSS) in Signal in Space (SIS) is a key indicator to evaluate the performance. In this paper, the SIS availability of Global Positioning System (GPS) and BeiDou Navigation Satellite System (BDS) are evaluated and analyzed. The model of satellite availability algorithm is constructed based on the Markov process, with its reliability investigated. Moreover, the evaluation algorithm of constellation availability is developed. Based on the evaluation models, the performance of GPS SIS and BDS SIS is evaluated by using the measured data, respectively. Combined with the availability standard of GPS Standard Positioning Service (SPS) performance standards and BDS Signal In Space Interface Control Document (Version 2.0), the proposed evaluation models of SIS availability are effective and the performance of GPS SIS and BDS SIS conform the availability of performance standards, respectively. Meanwhile, the results are instructive for the study of the availability performance monitoring and the evaluation of global BDS.

  20. BANYAN. VII. A New Population of Young Substellar Candidate Members of Nearby Moving Groups from the BASS Survey

    CERN Document Server

    Gagné, Jonathan; Cruz, Kelle L; Lafrenière, David; Doyon, René; Malo, Lison; Burgasser, Adam J; Naud, Marie-Eve; Artigau, Étienne; Bouchard, Sandie; Gizis, John E; Albert, Loïc

    2015-01-01

    [Abbreviated] We present the results of a near-infrared (NIR) spectroscopic follow-up survey of 182 M4-L7 low-mass stars and brown dwarfs (BDs) from the BANYAN All-Sky Survey (BASS) for candidate members of nearby, young moving groups (YMGs). We confirm signs of low-gravity for 42 new BD discoveries with estimated masses between 8-75 $M_{Jup}$ and identify previously unrecognized signs of low gravity for 24 known BDs. This allows us to refine the fraction of low-gravity dwarfs in the high-probability BASS sample to $\\sim$82%. We use this unique sample of 66 young BDs, supplemented with 22 young BDs from the literature, to construct new empirical NIR absolute magnitude and color sequences for low-gravity BDs. We obtain a spectroscopic confirmation of low-gravity for 2MASS J14252798-3650229, which is a new $\\sim$27 $M_{Jup}$, L4 $\\gamma$ bona fide member of AB Doradus. We identify a total of 19 new low-gravity candidate members of YMGs with estimated masses below 13 $M_{Jup}$, seven of which have kinematically ...

  1. Peer assisted learning: teaching dental skills and enhancing graduate attributes.

    Science.gov (United States)

    Cameron, D A; Binnie, V I; Sherriff, A; Bissell, V

    2015-09-25

    This study describes a pilot project in which peer assisted learning (PAL) is used to teach dental clinical skills. A cluster randomised controlled trial compared opinions of Bachelor of Dental Surgery (BDS) students from peer-led groups versus staff-led groups in a clinical (impression taking) and a pre-clinical (handpiece skills) task. BDS5 (peer tutors) in their final year delivered teaching to BDS1 (tutees) for each task. Quantitative data from tutees and the peer tutors was gathered from questionnaires, along with open written comments. PAL was well received by both tutees and peer tutors. BDS1 tutees rated BDS5 peer tutors highly for delivery of information, and level of feedback. The tutees considered peer tutors more approachable and less intimidating than staff. Peer tutors reported their own knowledge had increased as a result of teaching. In a summative OSCE (objective structured clinical examination) four months following the teaching, no statistical significant difference between the performance of peer-led and staff-led groups was found at stations related to the subject matter in question. It is argued that PAL, as well as being a useful method of delivering subject-specific teaching, is able to contribute to the development of graduate attributes.

  2. Habitable Planets Eclipsing Brown Dwarfs: Strategies for Detection and Characterization

    Science.gov (United States)

    Belu, Adrian R.; Selsis, Franck; Raymond, Sean N.; Pallé, Enric; Street, Rachel; Sahu, D. K.; von Braun, Kaspar; Bolmont, Emeline; Figueira, Pedro; Anupama, G. C.; Ribas, Ignasi

    2013-05-01

    Given the very close proximity of their habitable zones, brown dwarfs (BDs) represent high-value targets in the search for nearby transiting habitable planets that may be suitable for follow-up occultation spectroscopy. In this paper, we develop search strategies to find habitable planets transiting BDs depending on their maximum habitable orbital period (P HZ out). Habitable planets with P HZ out shorter than the useful duration of a night (e.g., 8-10 hr) can be screened with 100% completeness from a single location and in a single night (near-IR). More luminous BDs require continuous monitoring for longer duration, e.g., from space or from a longitude-distributed network (one test scheduling achieved three telescopes, 13.5 contiguous hours). Using a simulated survey of the 21 closest known BDs (within 7 pc) we find that the probability of detecting at least one transiting habitable planet is between 4.5^{+5.6}_{-1.4}% and 56^{+31}_{-13}%, depending on our assumptions. We calculate that BDs within 5-10 pc are characterizable for potential biosignatures with a 6.5 m space telescope using ~1% of a five-year mission's lifetime spread over a contiguous segment only one-fifth to one-tenth of this duration.

  3. Dynamics of Subarcsecond Bright Dots in the Transition Region above Sunspots and Their Relation to Penumbral Micro-jets

    Science.gov (United States)

    Samanta, Tanmoy; Tian, Hui; Banerjee, Dipankar; Schanche, Nicole

    2017-02-01

    Recent high-resolution observations have revealed that subarcsecond bright dots (BDs) with sub-minute lifetimes appear ubiquitously in the transition region (TR) above sunspot penumbra. The presence of penumbral micro-jets (PMJs) in the chromosphere was previously reported. It was proposed that both the PMJs and BDs are formed due to a magnetic reconnection process and may play an important role in heating of the penumbra. Using simultaneous observations of the chromosphere from the Solar Optical Telescope (SOT) on board Hinode and observations of the TR from the Interface Region Imaging Spectrograph, we study the dynamics of BDs and their relation to PMJs. We find two types of BDs, one that is related to PMJs, and another that does not show any visible dynamics in the SOT Ca ii H images. From a statistical analysis we show that these two types have different properties. The BDs that are related to PMJs always appear at the top of the PMJs, the vast majority of which show inward motion and originate before the generation of the PMJs. These results may indicate that the reconnection occurs at the lower coronal/TR height and initiates PMJs at the chromosphere. This formation mechanism is in contrast with the formation of PMJs by reconnection in the (upper) photosphere between differently inclined fields.

  4. Analysis of BeiDou Satellite Measurements with Code Multipath and Geometry-Free Ionosphere-Free Combinations.

    Science.gov (United States)

    Zhao, Qile; Wang, Guangxing; Liu, Zhizhao; Hu, Zhigang; Dai, Zhiqiang; Liu, Jingnan

    2016-01-20

    Using GNSS observable from some stations in the Asia-Pacific area, the carrier-to-noise ratio (CNR) and multipath combinations of BeiDou Navigation Satellite System (BDS), as well as their variations with time and/or elevation were investigated and compared with those of GPS and Galileo. Provided the same elevation, the CNR of B1 observables is the lowest among the three BDS frequencies, while B3 is the highest. The code multipath combinations of BDS inclined geosynchronous orbit (IGSO) and medium Earth orbit (MEO) satellites are remarkably correlated with elevation, and the systematic "V" shape trends could be eliminated through between-station-differencing or modeling correction. Daily periodicity was found in the geometry-free ionosphere-free (GFIF) combinations of both BDS geostationary Earth orbit (GEO) and IGSO satellites. The variation range of carrier phase GFIF combinations of GEO satellites is -2.0 to 2.0 cm. The periodicity of carrier phase GFIF combination could be significantly mitigated through between-station differencing. Carrier phase GFIF combinations of BDS GEO and IGSO satellites might also contain delays related to satellites. Cross-correlation suggests that the GFIF combinations' time series of some GEO satellites might vary according to their relative geometries with the sun.

  5. Analysis of BeiDou Satellite Measurements with Code Multipath and Geometry-Free Ionosphere-Free Combinations

    Directory of Open Access Journals (Sweden)

    Qile Zhao

    2016-01-01

    Full Text Available Using GNSS observable from some stations in the Asia-Pacific area, the carrier-to-noise ratio (CNR and multipath combinations of BeiDou Navigation Satellite System (BDS, as well as their variations with time and/or elevation were investigated and compared with those of GPS and Galileo. Provided the same elevation, the CNR of B1 observables is the lowest among the three BDS frequencies, while B3 is the highest. The code multipath combinations of BDS inclined geosynchronous orbit (IGSO and medium Earth orbit (MEO satellites are remarkably correlated with elevation, and the systematic “V” shape trends could be eliminated through between-station-differencing or modeling correction. Daily periodicity was found in the geometry-free ionosphere-free (GFIF combinations of both BDS geostationary Earth orbit (GEO and IGSO satellites. The variation range of carrier phase GFIF combinations of GEO satellites is −2.0 to 2.0 cm. The periodicity of carrier phase GFIF combination could be significantly mitigated through between-station differencing. Carrier phase GFIF combinations of BDS GEO and IGSO satellites might also contain delays related to satellites. Cross-correlation suggests that the GFIF combinations’ time series of some GEO satellites might vary according to their relative geometries with the sun.

  6. Microbial phytase addition resulted in a greater increase in phosphorus digestibility in dry-fed compared with liquid-fed non-heat-treated wheat-barley-maize diets for pigs

    DEFF Research Database (Denmark)

    Blaabjerg, Karoline; Thomassen, Anne-Marie; Poulsen, Hanne Damgaard

    2015-01-01

    and fed one of four diets for 12 days; 5 days for adaptation and 7 days for total, but separate collection of feces and urine. The basal diet was composed of wheat, barley, maize, soybean meal and no mineral phosphate. Dietary treatments were: basal dry-fed diet (BDD), BDD with microbial phytase (BDD......The objective was to evaluate the effect of microbial phytase (1250 FTU/kg diet with 88% dry matter (DM)) on apparent total tract digestibility (ATTD) of phosphorus (P) in pigs fed a dry or soaked diet. Twenty-four pigs (65±3 kg) from six litters were used. Pigs were housed in metabolism crates......+phy), BDD soaked for 24 h at 20°C before feeding (BDS) and BDS with microbial phytase (BDS+phy). Supplementation of microbial phytase increased ATTD of DM and crude protein (N×6.25) by 2 and 3 percentage units (P

  7. Long-term evolution of the inclined geosynchronous orbit in Beidou Navigation Satellite System

    Science.gov (United States)

    Tang, Jingshi; Hou, Xiyun; Liu, Lin

    2017-02-01

    China's Beidou Navigation Satellite System (BDS), unlike other navigation satellite systems, uses several inclined geosynchronous orbits (IGSO) to enhance the accuracy of regional or global navigation. In order to maintain a safe space environment in the vicinity of its operational orbit, it is necessary that the decommissioned satellites be well disposed of. To understand the underlying dynamics that affect the BDS IGSO, we study this problem from two aspects. In this paper, we first theoretically analyze the problem using the simplified models with 1 and 2 degrees of freedoms (1-/2-dof). Then we extensively investigate the numerically propagated orbits for 200 and 1000 years, applying the results from these simplified models and seeking proper explanations for the underlying dynamics. We especially focus on the eccentricity evolution, which is a major concern regarding the collision hazard. We expect to understand the underlying dynamics governing the long-term evolution of BDS IGSO and gain helpful insight into future disposal strategies.

  8. Dynamics at the Polymer/Nanoparticle Interface in Poly(2-vinylpyridine)/Silica Nanocomposites.

    Energy Technology Data Exchange (ETDEWEB)

    Holt, Adam P [ORNL; Griffin, Phillip [University of Tennessee (UTK) and Oak Ridge National Laboratory (ORNL); Bocharova, Vera [ORNL; Agapov, Alexander L [ORNL; Imel, Adam E [ORNL; Dadmun, Mark D [ORNL; Sangoro, Joshua R [ORNL; Sokolov, Alexei P [ORNL

    2014-01-01

    The static and dynamic properties of poly(2-vinylpyridine)/silica nanocomposites are investigated by temperature modulated differential scanning calorimetry, broadband dielectric spectroscopy (BDS), small-angle X-ray scattering (SAXS), and transmission electron microscopy. Both BDS and SAXS detect the existence of an interfacial polymer layer on the surface of nanoparticles. The results show that whereas the calorimetric glass transition temperature varies only weakly with nanoparticle loading, the segmental mobility of the polymer interfacial layer is slower than the bulk polymer by 2 orders of magnitude. Detailed analysis of BDS and SAXS data reveal that the interfacial layer has a thickness of 4 6 nm irrespective of the nanoparticle concentration. These results demonstrate that in contrast to some recent articles on polymer nanocomposites, the interfacial polymer layer is by no means a dead layer . However, its existence might provide some explanation for controversies surrounding the dynamics of polymer nanocomposites.

  9. Improved Measurement of Absolute Hadronic Branching Fractions of the Ds+ Meson

    CERN Document Server

    Onyisi, P U E; Cinabro, D; Smith, M J; Zhou, P; Naik, P; Rademacker, J; Edwards, K W; Briere, R A; Vogel, H; Rosner, J L; Alexander, J P; Cassel, D G; Das, S; Ehrlich, R; Gibbons, L; Gray, S W; Hartill, D L; Heltsley, B K; Kreinick, D L; Kuznetsov, V E; Patterson, J R; Peterson, D; Riley, D; Ryd, A; Sadoff, A J; Shi, X; Sun, W M; Yelton, J; Rubin, P; Lowrey, N; Mehrabyan, S; Selen, M; Wiss, J; Libby, J; Kornicer, M; Mitchell, R E; Besson, D; Pedlar, T K; Cronin-Hennessy, D; Hietala, J; Dobbs, S; Metreveli, Z; Seth, K K; Tomaradze, A; Xiao, T; Powell, A; Thomas, C; Wilkinson, G; Asner, D M; Tatishvili, G; Ge, J Y; Miller, D H; Shipsey, I P J; Xin, B; Adams, G S; Napolitano, J; Ecklund, K M; Insler, J; Muramatsu, H; Pearson, L J; Thorndike, E H; Artuso, M; Blusk, S; Mountain, R; Skwarnicki, T; Stone, S; Wang, J C; Zhang, L M

    2013-01-01

    The branching fractions of Ds meson decays serve to normalize many measurements of processes involving charm quarks. Using 586 pb^-1 of e+ e- collisions recorded at a center of mass energy of 4.17 GeV, we determine absolute branching fractions for 13 Ds decays in 16 reconstructed final states with a double tag technique. In particular we make a precise measurement of the branching fraction B(Ds -> K- K+ pi+) = (5.55 +- 0.14 +- 0.13)%, where the uncertainties are statistical and systematic respectively. We find a significantly reduced value of B(Ds -> pi+ pi0 eta') compared to the world average, and our results bring the inclusively and exclusively measured values of B(Ds -> eta' X)$ into agreement. We also search for CP-violating asymmetries in Ds decays and measure the cross-section of e+ e- -> Ds* Ds at Ecm = 4.17 GeV.

  10. Enhancement of dibenzothiophene biodesulfurization using {beta}-cyclodextrins in oil-to-water media

    Energy Technology Data Exchange (ETDEWEB)

    Ainhoa Caro; Pedro Leton; Eloy Garcia-Calvo; Leonardo Setti [Universidad de Alcala, Madrid (Spain). Departamento de Quimica Analitica e Ingeniera Quimica

    2007-11-15

    It has been reported that biodesulfurization (BDS) of dibenzothiophene (DBT) in oil-to-water emulsions is carried out by growing cells of the aerobic Rhodococcus erythropolis IGTS8 strain and developing the so-called 4S desulfurization pathway. On adding {beta}-cyclodextrins, it is possible to improve the BDS yields, increase the diffusion of DBT into the aqueous phase or avoid the HBP accumulation. Moreover, by using greater biocatalyst initial concentrations and adding 15 ppm of {beta}-cyclodextrin, a very high BDS yield has been observed, but the presence of mass transfer limitations and the inhibition effects were not satisfactorily avoided. The Haldane kinetic model agreed well with the experimental results obtained, and the values of the kinetic parameters were determined. Short communication. 20 refs., 2 figs., 2 tabs.

  11. A CONCEPTUAL TRAJECTORY MULTIDIMENSIONAL MODEL: AN APPLICATION TO PUBLIC TRANSPORTATION

    Directory of Open Access Journals (Sweden)

    FRANCISCO MORENO

    2011-01-01

    Full Text Available Actualmente, gracias a tecnologías como los sistemas de posicionamiento global y dispositivos móviles provistos de sensores, se puede recopilar una gran cantidad de datos sobre objetos móviles, e.g., datos relacionados con la trayectoria seguida por estos objetos. Por otra parte, las Bodegas de Datos (BDs, usualmente modeladas mediante una vista multidimensional de los datos, son bases de datos especializadas para ayudar en la toma de decisiones. Desafortunadamente, las BDs convencionales ofrecen poco soporte para la gestión de trayectorias. Aunque existen algunas propuestas que tratan con BDs de trayectorias, ninguna de ellas se enfoca en su modelamiento conceptual multidimensional. En este artículo se extiende un modelo conceptual multidimensional espacial donde se incorporan las trayectorias como conceptos de primera clase. Con el fi n de mostrar la conveniencia de la propuesta, se presenta un ejemplo relacionado con transporte público.

  12. Emissions and climate-relevant optical properties of pollutants emitted from a three-stone fire and the Berkeley-Darfur stove tested under laboratory conditions.

    Science.gov (United States)

    Preble, Chelsea V; Hadley, Odelle L; Gadgil, Ashok J; Kirchstetter, Thomas W

    2014-06-03

    Cooking in the developing world generates pollutants that endanger the health of billions of people and contribute to climate change. This study quantified pollutants emitted when cooking with a three-stone fire (TSF) and the Berkeley-Darfur Stove (BDS), the latter of which encloses the fire to increase fuel efficiency. The stoves were operated at the Lawrence Berkeley National Laboratory testing facility with a narrow range of fuel feed rates to minimize performance variability. Fast (1 Hz) measurements of pollutants enabled discrimination between the stoves' emission profiles and development of woodsmoke-specific calibrations for the aethalometer (black carbon, BC) and DustTrak (fine particles, PM2.5). The BDS used 65±5% (average±95% confidence interval) of the wood consumed by the TSF and emitted 50±5% of the carbon monoxide emitted by the TSF for an equivalent cooking task, indicating its higher thermal efficiency and a modest improvement in combustion efficiency. The BDS reduced total PM2.5 by 50% but achieved only a 30% reduction in BC emissions. The BDS-emitted particles were, therefore, more sunlight-absorbing: the average single scattering albedo at 532 nm was 0.36 for the BDS and 0.47 for the TSF. Mass emissions of PM2.5 and BC varied more than emissions of CO and wood consumption over all tests, and emissions and wood consumption varied more among TSF than BDS tests. The international community and the Global Alliance for Clean Cookstoves have proposed performance targets for the highest tier of cookstoves that correspond to greater reductions in fuel consumption and PM2.5 emissions of approximately 65% and 95%, respectively, compared to baseline cooking with the TSF. Given the accompanying decrease in BC emissions for stoves that achieve this stretch goal and BC's extremely high global warming potential, the short-term climate change mitigation from avoided BC emissions could exceed that from avoided CO2 emissions.

  13. Folic acid and primary prevention of birth defects.

    Science.gov (United States)

    Taruscio, Domenica; Carbone, Pietro; Granata, Orietta; Baldi, Francesca; Mantovani, Alberto

    2011-01-01

    Birth defects (BDs) are an important public health problem, due to their overall incidence, occurring in 2-3% of live births in European Union. Neural tube defects (NTDs) are among major NTDs, due to their severity and relatively high incidence; in the meanwhile NTDs are also the most effectively preventable BDs to date. In particular, an adequate folic acid (FA) intake reduces both the occurrence and the recurrence of NTDs; FA is the synthetic form of folates, naturally occurring vitamins in a number of foods, especially vegetables. The daily intake of 0.4 mg of FA should be recommended to all women of childbearing age who plan to become pregnant. The Italian Network for Primary Prevention of BDs through FA Promotion has achieved a significant improvement in FA awareness and use in the periconceptional period. Nevertheless, primary prevention of BDs needs to make further progress; the Italian National Centre for Rare Diseases participates in european sureveillance of congenital anomalies (EUROCAT) Joint Action as coordinator of activities on the effectiveness of BDs prevention. Mandatory food fortification with FA has not been introduced in any European country. The health benefits of FA in reducing the risk of NTDs are undisputed; however mechanistic and animal studies suggest a relationship between high FA intakes and increased cancer promotion, while human studies are still inconsistent and inconclusive. A Working Group organized by the European Food Safety Authority pointed out significant uncertainties about fortification safety and the need for more studies; currently, FA intake from fortified foods and supplements should not exceed 1 mg/day in adults. In conclusion, based on up-to-date scientific evidence, the Italian Network strategy pivots on periconceptional supplementation integrated with promotion of healthy eating habits, support to health education, enhancing the role of women in managing life choices about their health and pregnancy and increasing

  14. “北斗”卫星导航系统仿真与全球覆盖分析%Simulation and Global Coverage Analysis of Beidou Navigation Satellite System

    Institute of Scientific and Technical Information of China (English)

    王尔申; 岳孝东; 何赫; 曲萍萍

    2016-01-01

    为了解“北斗”卫星导航系统( BDS)的星座分布及其正式运行后卫星在全球范围内的覆盖情况,依据BDS卫星轨道参数,使用卫星工具包( STK)构建了完整的BDS空间星座,对BDS卫星轨道信息、可见性以及对地覆盖品质进行分析。在对可见性及覆盖品质的分析中,分别仿真分析了在4个不同的城市和全球范围进行观测得到的几何精度因子( GDOP)和导航精度等参数性能。研究结果对分析BDS系统的服务性能以及提高BDS的导航精度有一定的参考意义。%To learn constellation distribution and satellites global coverage after formal operation of Beidou navigation satellite system( BDS) ,this paper simulates the complete constellation of BDS by Satellite Tool Kit( STK) with the published information of BDS satellite orbit parameters. The orbital parameters,access and coverage of satellites are analyzed based on the simulated constellation of BDS. The performance of ge-ometric dilution of precision( GDOP) and navigation accuracy in four different stations and global area are simulated. The results of this study have a certain reference value for analyzing the service performance and improving BDS navigation accuracy.

  15. BeiDou satellite's differential code biases estimation based on uncombined precise point positioning with triple-frequency observable

    Science.gov (United States)

    Fan, Lei; Li, Min; Wang, Cheng; Shi, Chuang

    2017-02-01

    The differential code bias (DCB) of BeiDou satellite is an important topic to make better use of BeiDou system (BDS) for many practical applications. This paper proposes a new method to estimate the BDS satellite DCBs based on triple-frequency uncombined precise point positioning (UPPP). A general model of both triple-frequency UPPP and Geometry-Free linear combination of Phase-Smoothed Range (GFPSR) is presented, in which, the ionospheric observable and the combination of triple-frequency satellite and receiver DCBs (TF-SRDCBs) are derived. Then the satellite and receiver DCBs (SRDCBs) are estimated together with the ionospheric delay that is modeled at each individual station in a weighted least-squares estimator, and the satellite DCBs are determined by introducing the zero-mean condition of all available BDS satellites. To validate the new method, 90 day's real tracking GNSS data (from January to March in 2014) collected from 9 Multi-GNSS Experiment (MGEX) stations (equipped with Trimble NETR9 receiver) is used, and the BDS satellite DCB products from German Aerospace Center (DLR) are taken as reference values for comparison. Results show that the proposed method is able to precisely estimate BDS satellite DCBs: (1) the mean value of the day-to-day scattering for all available BDS satellites is about 0.24 ns, which is reduced in average by 23% when compared with the results derived by only GFPSR. Moreover, the mean value of the day-to-day scattering of IGSO satellites is lower than that of GEO and MEO satellites; (2) the mean value of RMS of the difference with respect to DLR DCB products is about 0.39 ns, which is improved by an average of 11% when compared with the results derived by only GFPSR. Besides, the RMS of IGSO and MEO satellites is at the same level which is better than that of GEO satellites.

  16. Identification, expression and activity analyses of five novel duck beta-defensins.

    Directory of Open Access Journals (Sweden)

    Deying Ma

    Full Text Available In the current study, five novel avian β-defensins (AvBDs were identified and characterized in tissues from Peking ducks (Anas platyrhynchos. The nucleotide sequences of these cDNAs comprised 198 bp, 182 bp, 201 bp, 204 bp, and 168 bp, and encoded 65, 60, 66, 67, and 55 amino acids, respectively. Homology, characterization and comparison of these genes with AvBD from other avian species confirmed that they were Apl_AvBD1, 3, 5, 6, and 16. Recombinant AvBDs were produced and purified by expressing these genes in Escherichia coli. In addition, peptides were synthesized according to the respective AvBD sequences. Investigation of the antibacterial activity of the Apl_AvBDs showed that all of them exhibited antibacterial activity against all 12 bacteria investigated (P<0.05 or P<0.01. In addition, the antibacterial activity of all of the AvBDs against M. tetragenus and P. multocida decreased significantly in the presence of 150 mM NaCl (P<0.01. None of the AvBDs showed hemolytic activity. Consistent with their broad-spectrum antibacterial activity, the five novel Apl_AvBDs inhibited replication of duck hepatitis virus (DHV in vitro significantly (P<0.05. The mRNA expression of all five Apl_AvBD in most tissues, including immune organs and the liver, was upregulated in response to DHV infection at different time points. These findings provide evidence that these defensins activate the immune response to combat microbial infection.

  17. Implications of large B0d-B¯0d mixing

    Science.gov (United States)

    Du, Dongsheng; Zhao, Zhiyong

    1987-09-01

    Implications of the large B0d-B¯ 0d mixing measured by the ARGUS Collaboration are examined. Possible large top-quark mass is estimated. In addition, large CP-nonconservation effects in the two-body nonleptonic decays of B0d-B¯ 0d and B0s-B¯ 0s are recalculated. The results show that we still need ~106 Bd,s0-B¯ d,s0 pairs for testing these CP-nonconservation effects in the Bd,s0-B¯ d,s0 system.

  18. Hi-C Observations of Sunspot Penumbral Bright Dots

    OpenAIRE

    Alpert, Shane E.; Tiwari, Sanjiv K.; Moore, Ronald L.; Winebarger, Amy R.; Savage, Sabrina L.

    2016-01-01

    We report observations of bright dots (BDs) in a sunspot penumbra using High Resolution Coronal Imager (Hi-C) data in 193 \\AA\\ and examine their sizes, lifetimes, speeds, and intensities. The sizes of the BDs are on the order of 1\\arcsec\\ and are therefore hard to identify in the Atmospheric Imaging Assembly (AIA) 193 \\AA\\ images, which have 1.2\\arcsec\\ spatial resolution, but become readily apparent with Hi-C's five times better spatial resolution. We supplement Hi-C data with data from AIA'...

  19. Start-to-End Tracking Simulations of the Compact Linear Collider

    CERN Document Server

    Resta-Lopez, Javier; Dalena, Barbara; Schulte, Daniel; Snuverink, Jochem; Stulle, Frank; Tomas, Rogelio; Latina, Andrea

    2010-01-01

    We present the current status of the beam tracking simulations of the Compact Linear Collider (CLIC) from the exit of the damping ring to the interaction point, including the ring to main linac (RTML) section, main linac, beam delivery system (BDS) and beam-beam interactions. This model introduces realistic alignment survey errors, dynamic imperfections and also the possibility to study collective effects in the main linac and the BDS. Special emphasis is put on low emittance transport and beam stabilisation studies, applying beam based alignment methods and feedback systems. The aim is to perform realistic integrated simulations to obtain reliable luminosity predictions

  20. China Satellite Navigation Conference

    CERN Document Server

    Liu, Jingnan; Fan, Shiwei; Wang, Feixue

    2016-01-01

    These Proceedings present selected research papers from CSNC2016, held during 18th-20th May in Changsha, China. The theme of CSNC2016 is Smart Sensing, Smart Perception. These papers discuss the technologies and applications of the Global Navigation Satellite System (GNSS), and the latest progress made in the China BeiDou System (BDS) especially. They are divided into 12 topics to match the corresponding sessions in CSNC2016, which broadly covered key topics in GNSS. Readers can learn about the BDS and keep abreast of the latest advances in GNSS techniques and applications.

  1. The Superconducting Magnets of the ILC Beam Delivery System

    Energy Technology Data Exchange (ETDEWEB)

    Parker, B.; Anerella, M.; Escallier, J.; He, P.; Jain, A.; Marone, A.; /Brookhaven; Nosochkov, Y.; Seryi, Andrei; /SLAC

    2007-09-28

    The ILC Beam Delivery System (BDS) uses a variety of superconducting magnets to maximize luminosity and minimize background. Compact final focus quadrupoles with multifunction correction coils focus incoming beams to few nanometer spot sizes while focusing outgoing disrupted beams into a separate extraction beam line. Anti-solenoids mitigate effects from overlapping focusing and the detector solenoid field. Far from the interaction point (IP) strong octupoles help minimize IP backgrounds. A low-field but very large aperture dipole is integrated with the detector solenoid to reduce backgrounds from beamstrahlung pairs generated at the IP. Physics requirements and magnetic design solutions for the BDS superconducting magnets are reviewed in this paper.

  2. Two Na+ and Cl- Hyperaccumulators of the Chenopodiaceae

    Institute of Scientific and Technical Information of China (English)

    Ke-Fu ZHAO; Hai FAN; Jie SONG; Ming-Xia SUN; Bao-Zeng WANG; Sheng-Qiang ZHANG; I. A. UNGAR

    2005-01-01

    The authors found five sodium (Na+) and chloride (Cl-) hyperaccumulating halophytes in the Temperate Desert of Xinjiang, China and studied two of them (Suaeda salsa (L.) Pall. and Kalidium folium (Pall.) Moq.). K. folium and S. salsa had a NaCl content of 32.1% and 29.8%, respectively, on a dry weight basis. X-ray microanalysis of the Na+ in the vacuole, apoplasts and cytoplasm of the two plants indicated a ratio of 7.3:5.6:1.0 in K. folium and 7.3:6.6:1.0 in S. salsa. These data show that K. folium and S. salsa both have a high Na+ and Cl-accumulating capacity, which is related to high activity oftonoplast H+-ATPase and H+-PPase.

  3. Studies on a New Random Packing-Plum Flower Mini Ring

    Institute of Scientific and Technical Information of China (English)

    费维扬; 孙兰义; 等

    2002-01-01

    The hydrodynamics and mass transfer of Plum Flower Mini Ring(PFMR),Pall Ring and Intalox Saddle were studied in a 600mm diameter column with air-oxygen-water system over a wide range of liquid loasds.It was shown from the experiments that PFMR had much lower resistance,larger throughput and higher mass transfer efficiency than Pall Ring and Intalox Saddle.It was clear from the comparison that existing equations could not predict the performance of packings very well at high liquied loads.Therefore,new semi-empirical equations of pressure drop,flooding gas velocity and height of transfer unit(HTU)were proposed based on the experimental data.

  4. Study on the Original Plants and Macroscopic Characters of Radix Paeoniae%白芍的原植物鉴定及药材形态观察

    Institute of Scientific and Technical Information of China (English)

    周义峰; 杭悦宇; 陈丙銮

    2005-01-01

    对我国10个主产区的不同类型白芍原植物及药材,制作标本,进行形态鉴别.结果表明,我国主产区白芍原植物为芍药Paeonia lactiflora Pall.和毛果芍药P.lactiflora Pall.var.trichocarpa(Bunge)Stern.前者的药材,呈圆柱形,表面类白色至红棕色,有纵皱纹及细根痕,偶有残存的棕褐色外皮.断面较平坦,类白色或微棕红色,木质部具有放射状纹理,味酸;后者的药材,多呈长条形,外皮棕色,断面粉性足,味甘.

  5. NCBI nr-aa BLAST: CBRC-ETEL-01-0139 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-ETEL-01-0139 gb|AAX45302.1| cytochrome b [Globodera pallida] gb|AAX45304.1| cytochrome b [Globodera pal...lida] gb|AAX45307.1| cytochrome b [Globodera pallida] gb|AAX45308.1| cytochrome b [Globodera pall...ida] gb|AAX45309.1| cytochrome b [Globodera pallida] AAX45302.1 0.085 24% ...

  6. NCBI nr-aa BLAST: CBRC-DYAK-08-0032 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-DYAK-08-0032 gb|AAX45321.1| cytochrome b [Globodera pallida] gb|AAX45322.1| cytochrome b [Globodera pal...lida] gb|AAX45323.1| cytochrome b [Globodera pallida] gb|AAX45324.1| cytochrome b [Globodera pall...ida] gb|AAX45325.1| cytochrome b [Globodera pallida] gb|AAX45326.1| cytochrome b [Globodera pallida] AAX45321.1 0.95 22% ...

  7. NCBI nr-aa BLAST: CBRC-ETEL-01-0139 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-ETEL-01-0139 gb|AAX45297.1| cytochrome b [Globodera pallida] gb|AAX45298.1| cytochrome b [Globodera pal...lida] gb|AAX45299.1| cytochrome b [Globodera pallida] gb|AAX45300.1| cytochrome b [Globodera pall...ida] gb|AAX45303.1| cytochrome b [Globodera pallida] gb|AAX45305.1| cytochrome b [Globodera pallida] AAX45297.1 0.085 24% ...

  8. NCBI nr-aa BLAST: CBRC-DYAK-08-0033 [SEVENS

    Lifescience Database Archive (English)

    Full Text Available CBRC-DYAK-08-0033 gb|AAX45321.1| cytochrome b [Globodera pallida] gb|AAX45322.1| cytochrome b [Globodera pal...lida] gb|AAX45323.1| cytochrome b [Globodera pallida] gb|AAX45324.1| cytochrome b [Globodera pall...ida] gb|AAX45325.1| cytochrome b [Globodera pallida] gb|AAX45326.1| cytochrome b [Globodera pallida] AAX45321.1 2.1 22% ...

  9. German Unification: Security Implications for Europe

    Science.gov (United States)

    1990-07-01

    Press. 1978. 4. Calleo. David. Beyond American Hegemony: The Future of the Western Alliance, New York, Basic Books. 1987. 5. Cahen. Alfred . The...Grosser. Alfred , Germany in Our Time: A Political HistDry of the Postwar Years. London: Pall Mall Press. !971, 7. Grosser. Alfred . The Western...Washington: National Defense University Press. 1987. :7, Schutze ., Walter. France and Germany: Cooperation and Conflict in Defence and Security. Geneva

  10. Näitused kunstiakadeemias

    Index Scriptorium Estoniae

    2003-01-01

    EKA galeriis näitusel "Kirju pall" esitavad "krutskilist ökokunsti" rühmitus Puhas Rõõm, Mart Viljus, Anu Vahtra, Maris Mändel, Katrin Tees, Reimo Võsa-Tangsoo, Erki Kasemets, Raivo Hool. Aula fuajees näeb Jaak Soansi juhendamisel valminud skulptuuriosakonna õppetöid, valdavalt poliitikute skulptuurportreid. Osalevad Kristiina Järvelaid, Jelena Levtshenkova, Rene Reinumäe, Kaisa Uusoksa, Marju Vaher

  11. Airborne Sensor Potential for Habitat Evaluation Procedures (HEP).

    Science.gov (United States)

    1986-02-01

    guidelines for the d, vol-Ipitnet (A airborne sensor 3ppi ic~tions to the US Fish and Wililtifc...fr.iq J.Iqjsn *uld q~jq pooCg - A0,I- P.9A -41100fi uPall- -iied qus. o .;A (W.3 P.S’-.9. .1JI1OP. ua.l.t:4 𔃻𔃾lti P.,SC)Pts r.- aaop s0ul-~r9Iw

  12. Dihydrochalcone glycosides from Oxytropis myriophylla

    Directory of Open Access Journals (Sweden)

    She Gaimei

    2011-11-01

    Full Text Available Abstract Chemical investigations of the 70% alcohol extract of Oxytropis myriophylla (Pall. DC. (Leguminosae have afforded the new natural product neohesperidin dihydrochalcone (1 and the known phloretin-4'-O-β-D-glucopyranoside (2, which was the first reported from the genus Oxytropis. This paper reports the isolation and full spectroscopic characterization of compounds 1 and 2 by NMR, UV, IR and MS data.

  13. Archaeological Investigations in Upland Kaneohe: Survey and Salvage Excavations in the Upper Kamo’oali’i Stream Drainage Area Kaneohe, Ko’olaupoko, Oahu, Hawaii,

    Science.gov (United States)

    1976-06-01

    From the foot of the Pall] thence the road passed through a dense coppice of Pandanus trees laden with large fruits and beautiful male flowers...very limited. In the streams were some freshwater fish, mainly tiiapia and guppies , and small crayfish (both Macrobraohiiv ::’- manus [Randall] and...assemblages both display very similar distribution, both indicating normal distributions of sample ages. Table 6-14 presents the basic statistics for

  14. Designing and Validating Ternary Pd Alloys for Optimum Sulfur/Carbon Resistance in Hydrogen Separation and Carbon Capture Membrane Systems Using High-Throughput Combinatorial Methods

    Energy Technology Data Exchange (ETDEWEB)

    Lewis, Amanda [Pall Corporation, Port Washington, NY (United States); Zhao, Hongbin [Pall Corporation, Port Washington, NY (United States); Hopkins, Scott [Pall Corporation, Port Washington, NY (United States)

    2014-12-01

    This report summarizes the work completed under the U.S. Department of Energy Project Award No.: DE-FE0001181 titled “Designing and Validating Ternary Pd Alloys for Optimum Sulfur/Carbon Resistance in Hydrogen Separation and Carbon Capture Membrane Systems Using High-Throughput Combinatorial Methods.” The project started in October 1, 2009 and was finished September 30, 2014. Pall Corporation worked with Cornell University to sputter and test palladium-based ternary alloys onto silicon wafers to examine many alloys at once. With the specialized equipment at Georgia Institute of Technology that analyzed the wafers for adsorbed carbon and sulfur species six compositions were identified to have resistance to carbon and sulfur species. These compositions were deposited on Pall AccuSep® supports by Colorado School of Mines and then tested in simulated synthetic coal gas at the Pall Corporation. Two of the six alloys were chosen for further investigations based on their performance. Alloy reproducibility and long-term testing of PdAuAg and PdZrAu provided insight to the ability to manufacture these compositions for testing. PdAuAg is the most promising alloy found in this work based on the fabrication reproducibility and resistance to carbon and sulfur. Although PdZrAu had great initial resistance to carbon and sulfur species, the alloy composition has a very narrow range that hindered testing reproducibility.

  15. Designing and Validating Ternary Pd Alloys for Optimum Sulfur/Carbon Resistance in Hydrogen Separation and Carbon Capture Membrane Systems Using High-Throughput Combinatorial Methods

    Energy Technology Data Exchange (ETDEWEB)

    Lewis, Amanda; Zhao, Hongbin; Hopkins, Scott

    2014-09-30

    This report summarizes the work completed under the U.S. Department of Energy Project Award No.: DE-FE0001181 titled “Designing and Validating Ternary Pd Alloys for Optimum Sulfur/Carbon Resistance in Hydrogen Separation and Carbon Capture Membrane Systems Using High-Throughput Combinatorial Methods.” The project started in October 1, 2009 and was finished September 30, 2014. Pall Corporation worked with Cornell University to sputter and test palladium-based ternary alloys onto silicon wafers to examine many alloys at once. With the specialized equipment at Georgia Institute of Technology that analyzed the wafers for adsorbed carbon and sulfur species six compositions were identified to have resistance to carbon and sulfur species. These compositions were deposited on Pall AccuSep® supports by Colorado School of Mines and then tested in simulated synthetic coal gas at the Pall Corporation. Two of the six alloys were chosen for further investigations based on their performance. Alloy reproducibility and long-term testing of PdAuAg and PdZrAu provided insight to the ability to manufacture these compositions for testing. PdAuAg is the most promising alloy found in this work based on the fabrication reproducibility and resistance to carbon and sulfur. Although PdZrAu had great initial resistance to carbon and sulfur species, the alloy composition has a very narrow range that hindered testing reproducibility.

  16. 78 FR 62820 - Self-Regulatory Organizations; The NASDAQ Stock Market LLC; Notice of Filing and Immediate...

    Science.gov (United States)

    2013-10-22

    ... Effectiveness of Proposed Rule Change To Extend Fee Pilot Program for NASDAQ Last Sale September 30, 2013... ``eyeballs'' that contribute to their advertising revenue. Retail BDs, such as Schwab and Fidelity, offer... characteristics of the product at issue and the evidence already presented. III. Date of Effectiveness of...

  17. The open service signal in space navigation data comparison of the Global Positioning System and the BeiDou Navigation Satellite System.

    Science.gov (United States)

    Jan, Shau-Shiun; Tao, An-Lin

    2014-08-19

    More and more Global Navigation Satellite Systems (GNSSs) have been developed and are in operation. Before integrating information on various GNSSs, the differences between the various systems must be studied first. This research focuses on analyzing the navigation data differences between the Chinese BeiDou Navigation Satellite System (BDS) and the United States' Global Positioning System (GPS). In addition to explaining the impact caused by these two different coordinate and time systems, this research uses an actual open service signal in space (SIS) for both GPS and BDS to analyze their current system performance. Five data quality analysis (DQA) mechanisms are proposed in this research to validate both systems' SIS navigation data. These five DQAs evaluate the differences in ephemeris and almanac messages from both systems for stability and accuracy. After all of the DQAs, the different issues related to GPS and BDS satellite information are presented. Finally, based on these DQA results, this research provides suggested resolutions for the combined use of GPS and BDS for navigation and guidance.

  18. Rapid on-site TLC-SERS detection of four antidiabetes drugs used as adulterants in botanical dietary supplements.

    Science.gov (United States)

    Zhu, Qingxia; Cao, Yongbing; Cao, Yingying; Chai, Yifeng; Lu, Feng

    2014-03-01

    A novel facile method has been established for rapid on-site detection of antidiabetes chemicals used to adulterate botanical dietary supplements (BDS) for diabetes. Analytes and components of pharmaceutical matrices were separated by thin-layer chromatography (TLC) then surface-enhanced Raman spectroscopy (SERS) was used for qualitative identification of trace substances on the HPTLC plate. Optimization and standardization of the experimental conditions, for example the method used for preparation of silver colloids, the mobile phase, and the concentration of colloidal silver, resulted in a very robust and highly sensitive method which enabled successful detection when the amount of adulteration was as low as 0.001 % (w/w). The method was also highly selective, enabling successful identification of some chemicals in extremely complex herbal matrices. The established TLC-SERS method was used for analysis of real BDS used to treat diabetes, and the results obtained were verified by liquid chromatography-triple quadrupole mass spectrometry (LC-MS-MS). The study showed that TLC-SERS could be used for effective separation and detection of four chemicals used to adulterate BDS, and would have good prospects for on-site qualitative screening of BDS for adulterants.

  19. Effect of non-universal Z boson on lepton flavor violating decays

    CERN Document Server

    Mohanta, R

    2010-01-01

    We study the three body lepton flavor violating (LFV) decays $\\mu^- \\to e^- e^+ e^-$, $\\tau^- \\to l_i^- l_j^+ l_j^-$ and the semileptonic decay $\\tau \\to \\mu \\phi $ in a model with an extra non-universal $Z$ boson. We also calculate the branching ratios for LFV leptonic $B$ decays, $B_{d,s} \\to \\mu e$, $B_{d,s} \\to \\tau e$ and $B_{d,s} \\to \\tau \\mu$. The new physics parameter space is constrained by using the experimental limits on $\\mu^- \\to e^- e^+ e^-$ and $\\tau^- \\to \\mu^- \\mu^+ \\mu^-$. We find that the branching ratios for $\\tau \\to eee $ and $\\tau \\to \\mu \\phi$ processes could be as large as $\\sim {\\cal O}(10^{-8})$ and ${\\rm Br} (B_{d,s} \\to \\tau \\mu,~ \\tau e) \\sim {\\cal O}(10^{-10})$. For other LFV $B$ decays the branching ratios are found to be too small to be observed in the near future.

  20. Combustion products of 1,3-butadiene inhibit catalase activity and induce expression of oxidative DNA damage repair enzymes in human bronchial epithelial cells

    OpenAIRE

    2008-01-01

    1,3-Butadiene, an important petrochemical, is commonly burned off when excess amounts need to be destroyed. This combustion process produces butadiene soot (BDS), which is composed of a complex mixture of polyaromatic hydrocarbons in particulates ranging in size from

  1. Bodily Distress Syndrome

    DEFF Research Database (Denmark)

    Budtz-Lilly, Anna; Vestergaard, Mogens; Moth, Grete

    2011-01-01

    , and their interpretation of the content of the contact. The patients were asked to complete questionnaires on symptom score for BDS, self evaluated health (SF-12), mental health (Symptom Check List: SCL), health anxiety (Whiteley-7), smoking, alcohol dependency (CAGE) and patient evaluation of practice (DanPEP). Results...

  2. Relation between Brown Dwarfs and Exoplanets

    CERN Document Server

    Torres, Lauren Melissa Flor; Schröeder, Klauss-Peter; Caretta, César A; Jack, Dennis

    2016-01-01

    One of the most debated subjects in Astronomy since the discovery of exoplanets is how can we distinguish the most massive of such objects from very-low mass stars like Brown Dwarfs (BDs)? We have been looking for evidences of a difference in physical characteristics that could be related to different formation processes. Using a new diagnostic diagram that compares the baryonic gravitational potential (BGP) with the distances from their host stars, we have classified a sample of 355 well-studied exoplanets according to their possible structures. We have then compared the exoplanets to a sample of 87 confirmed BDs, identifying a range in BGP that could be common to both objects. By analyzing the mass-radius relations (MRR) of the exoplanets and BDs in those different BGP ranges, we were able to distinguish different characteristic behaviors. By comparing with models in the literature, our results suggest that BDs and massive exoplanets might have similar structures dominated by liquid metallic hydrogen (LMH).

  3. Importance of clinical posting for awareness on bio-medical waste in medical and paramedical students

    Directory of Open Access Journals (Sweden)

    Jemil S Makadia

    2014-10-01

    Full Text Available Background: The management of health care waste is the subject of considerable concern to public health. Unscientific disposal of health care waste may lead to the transmission of communicable disease which is a risk for health care professionals. Objective: The main objective of this study was to assess the awareness in the medical and paramedical students about bio-medical waste (BMW hazards and management and to see the impact of clinical posting in knowledge regarding BMW handling. Materials and Methods: This was a cross-sectional type of study. A total of 240 subjects was enrolled, 60 each from 1 st year students of MBBS, BDS, nursing, and MLT. They were interviewed for health care waste management practices. Results: Study shows overall awareness regarding BMW in nursing and MLT students were better than MBBS and BDS students. We found that about the infection like HIV almost all the students were equally aware but awareness about hepatitis B infection was more in MBBS and BDS students and also in nursing students compared with MLT students. All the students from four groups were almost vaccinated for tetanus toxoid but only 50% students were vaccinated for hepatitis B. Conclusion: The nursing and MLT students comparatively were having better knowledge and attitude than BDS and MBBS students in many aspects. However, overall knowledge of 1 st year students from all the groups was not satisfactory and number of students those who were vaccinated for hepatitis B was also low which put them at risk.

  4. The use of skin surface electropotentials for breast cancer detection--preliminary clinical trial results obtained using the biofield diagnostic system.

    Science.gov (United States)

    Sree, Subbhuraam Vinitha; Ng, E Y K; Kaw, G; U, Rajendra Acharya; Chong, B K

    2011-02-01

    The purpose of this study is to evaluate the efficiency of the Biofield Diagnostic System (BDS) as an adjunct to established diagnostic techniques such as mammography and ultrasound in differentiating benign and malignant breast lesions. The clinical trial was conducted at the Tan Tock Seng hospital, Singapore. 103 women scheduled for mammography and/or ultrasound tests participated in the study. The BDS test recorded a sensitivity of 100%, specificity of 97.6%, and an accuracy of 98.1%. The area under the ROC curve was 0.988 which was slightly lower than that of ultrasound (0.994) and slightly higher than that of mammography (0.951). The BDS test has demonstrated high sensitivity and specificity values in the studied population. The accuracy is also comparable to that of diagnostic techniques like mammography and ultrasound. Thus, it is evident that BDS can be a fast and reliable adjunct tool for getting a secondary opinion on lesions with indeterminate mammographic and sonographic results.

  5. 77 FR 61810 - Self-Regulatory Organizations; The NASDAQ Stock Market LLC; Notice of Filing and Immediate...

    Science.gov (United States)

    2012-10-11

    ... ``eyeballs'' that contribute to their advertising revenue. Retail BDs, such as Schwab and Fidelity, offer... possible, and equally reasonable, pricing strategies as the means of recovering total costs. NASDAQ pays... high prices for accessing posted liquidity. Other platforms may choose a strategy of paying...

  6. Observation of Two New Xi(-)(b) Baryon Resonances

    NARCIS (Netherlands)

    Aaij, R.; Adeva, B.; Adinolfi, M.; Affolder, A.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvarez Cartelle, P.; Alves, A. A.; Amato, S.; Amerio, S.; Amhis, Y.; An, L.; Anderlini, L.; Anderson, J.; Andreassen, R.; Andreotti, M.; Andrews, J. E.; Appleby, R. B.; Aquines Gutierrez, O.; Archilli, F.; Artamonov, A.; Artuso, M.; Aslanides, E.; Auriemma, G.; Baalouch, M.; Bachmann, S.; Back, J. J.; Badalov, A.; Baesso, C.; Baldini, W.; Barlow, R. J.; Barschel, C.; Barsuk, S.; Barter, W.; Batozskaya, V.; Battista, V.; Bay, A.; Beaucourt, L.; Beddow, J.; Bedeschi, F.; Bediaga, I.; Belogurov, S.; Belous, K.; Belyaev, I.; Ben-Haim, E.; Bencivenni, G.; Benson, S.; Benton, J.; Berezhnoy, A.; Bernet, R.; Bertolin, A.; Bettler, M. -O.; van Beuzekom, M.; Bien, A.; Bifani, S.; Bird, T.; Bizzeti, A.; Bjornstad, P. M.; Blake, T.; Blanc, F.; Blouw, J.; Blusk, S.; Bocci, V.; Bondar, A.; Bondar, N.; Bonivento, W.; Borghi, S.; Borgia, A.; Borsato, M.; Bowcock, T. J. V.; Bowen, E.; Bozzi, C.; Brett, D.; Britsch, M.; Britton, T.; Brodzicka, J.; Brook, N. H.; Bursche, A.; Buytaert, J.; Cadeddu, S.; Calabrese, R.; Calvi, M.; Calvo Gomez, M.; Campana, P.; Campora Perez, D.; Capriotti, L.; Carbone, A.; Carboni, G.; Cardinale, R.; Cardini, A.; Carson, L.; Akiba, K. Carvalho; Casanova Mohr, R. C. M.; Casse, G.; Cassina, L.; Castillo Garcia, L.; Cattaneo, M.; Cauet, Ch.; Cenci, R.; Charles, M.; Charpentier, Ph.; Chefdeville, M.; Chen, S.; Cheung, S. -F.; Chiapolini, N.; Chrzaszcz, M.; Vidal, X. Cid; Ciezarek, G.; Clarke, P. E. L.; Clemencic, M.; Cliff, H. V.; Closier, J.; Coco, V.; Cogan, J.; Cogneras, E.; Cogoni, V.; Cojocariu, L.; Collazuol, G.; Collins, P.; Comerma-Montells, A.; Contu, A.; Cook, A.; Coombes, M.; Coquereau, S.; Corti, G.; Corvo, M.; Counts, I.; Couturier, B.; Cowan, G. A.; Craik, D. C.; Crocombe, A. C.; Torres, M. Cruz; Cunliffe, S.; Currie, R.; D'Ambrosio, C.; Dalseno, J.; David, P.; David, P. N. Y.; Davis, A.; De Bruyn, K.; De Capua, S.; De Cian, M.; De Miranda, J. M.; De Paula, L.; De Silva, W.; De Simone, P.; Dean, C. -T.; Decamp, D.; Deckenhoff, M.; Del Buono, L.; Deleage, N.; Derkach, D.; Deschamps, O.; Dettori, F.; Dey, B.; Di Canto, A.; Di Domenico, A.; Dijkstra, H.; Donleavy, S.; Dordei, F.; Dorigo, M.; Dosil Suarez, A.; Dossett, D.; Dovbnya, A.; Dreimanis, K.; Dujany, G.; Dupertuis, F.; Durante, P.; Dzhelyadin, R.; Dziurda, A.; Dzyuba, A.; Easo, S.; Egede, U.; Egorychev, V.; Eidelman, S.; Eisenhardt, S.; Eitschberger, U.; Ekelhof, R.; Eklund, L.; El Rifai, I.; Elsasser, Ch.; Ely, S.; Esen, S.; Evans, H. -M.; Evans, T.; Falabella, A.; Faerber, C.; Farinelli, C.; Farley, N.; Farry, S.; Fay, R.; Ferguson, D.; Fernandez Albor, V.; Ferreira Rodrigues, F.; Ferro-Luzzi, M.; Filippov, S.; Fiore, M.; Fiorini, M.; Firlej, M.; Fitzpatrick, C.; Fiutowski, T.; Fol, P.; Fontana, M.; Fontanelli, F.; Forty, R.; Francisco, O.; Frank, M.; Frei, C.; Frosini, M.; Fu, J.; Furfaro, E.; Gallas Torreira, A.; Galli, D.; Gallorini, S.; Gambetta, S.; Gandelman, M.; Gandini, P.; Gao, Y.; Garcia Pardinas, J.; Garofoli, J.; Garra Tico, J.; Garrido, L.; Gascon, D.; Gaspar, C.; Gastaldi, U.; Gauld, R.; Gavardi, L.; Gazzoni, U.; Geraci, A.; Gersabeck, E.; Gersabeck, M.; Gershon, T.; Ghez, Ph.; Gianelle, A.; Giani, S.; Gibson, V.; Giubega, L.; Gligorov, V. V.; Goebel, C.; Golubkov, D.; Golutvin, A.; Gomes, A.; Gotti, C.; Gandara, M. Grabalosa; Graciani Diaz, R.; Cardoso, L. A. Granado; Grauges, E.; Graverini, E.; Graziani, G.; Grecu, A.; Greening, E.; Gregson, S.; Griftith, P.; Grillo, L.; Gruenberg, O.; Gui, B.; Gushchin, E.; Guz, Yu.; Gys, T.; Hadjivasiliou, C.; Haefeli, G.; Haen, C.; Haines, S. C.; Hall, S.; Hamilton, B.; Hampson, T.; Han, X.; Hansmann-Menzemer, S.; Harnew, N.; Harnew, S. T.; Harrison, J.; He, J.; Head, T.; Heijne, V.; Hennessy, K.; Henrard, P.; Henry, L.; Hernando Morata, J. A.; van Herwijnen, E.; Hess, M.; Hicheur, A.; Hill, D.; Hoballah, M.; Hombach, C.; Hulsbergen, W.; Hussain, N.; Hutchcroft, D.; Hynds, D.; Idzik, M.; Ilten, P.; Jacobsson, R.; Jaeger, A.; Jalocha, J.; Jans, E.; Jaton, P.; Jawahery, A.; Jing, F.; John, M.; Johnson, D.; Jones, C. R.; Joram, C.; Jost, B.; Jurik, N.; Kandybei, S.; Kanso, W.; Karacson, M.; Karbach, T. M.; Karodia, S.; Kelsey, M.; Kenyon, I. R.; Ketel, T.; Khanji, B.; Khurewathanakul, C.; Klaver, S.; Klimaszewski, K.; Kochebina, O.; Kolpin, M.; Komarov, I.; Koopman, R. F.; Koppenburg, P.; Korolev, M.; Kravchuk, L.; Kreplin, K.; Kreps, M.; Krocker, G.; Krokovny, P.; Kruse, F.; Kucewicz, W.; Kucharczyk, M.; Kudryavtsev, V.; Kurek, K.; Kvaratskheliya, T.; La Thi, V. N.; Lacarrere, D.; Lafferty, G.; Lai, A.; Lambert, D.; Lambert, R. W.; Lanfranchi, G.; Langenbruch, C.; Langhans, B.; Latham, T.; Lazzeroni, C.; Le Gac, R.; Van Leerdam, J.; Lees, J. -P.; Lefevre, R.; Leflat, A.; Lefrancois, J.; Leroy, O.; Lesiak, T.; Leverington, B.; Li, Y.; Likhomanenko, T.; Liles, M.; Lindner, R.; Linn, C.; Lionetto, F.; Liu, B.; Lohn, S.; Longstaff, I.; Lopes, J. H.; Lowdon, P.; Lucchesi, D.; Luo, H.; Lupato, A.; Luppi, E.; Lupton, O.; Machefert, F.; Machikhiliyan, I. V.; Maciuc, F.; Maev, O.; Malde, S.; Malinin, A.; Manca, G.; Mancinelli, G.; Mapelli, A.; Maratas, J.; Marchand, J. F.; Marconi, U.; Benito, C. Mann; Marino, P.; Maerki, R.; Marks, J.; Martellotti, G.; Martinelli, M.; Santos, D. Martinez; Vidal, F. Martinez; Martin Tostes, D.; Massafferri, A.; Matev, R.; Mathe, Z.; Matteuzzi, C.; Mazurov, A.; McCann, M.; McCarthy, J.; McNab, A.; McNulty, R.; McSkelly, B.; Meadows, B.; Meier, F.; Meissner, M.; Merk, M.; Milanes, D. A.; Minard, M. -N.; Moggi, N.; Rodriguez, J. Molina; Monteil, S.; Morandin, M.; Morawski, P.; Morda, A.; Morello, M. J.; Moron, J.; Morris, A. -B.; Mountain, R.; Muheim, F.; Mueller, K.; Mussini, M.; Muster, B.; Naik, P.; Nakada, T.; Nandakumar, R.; Nasteva, I.; Needham, M.; Neri, N.; Neubert, S.; Neufeld, N.; Neuner, M.; Nguyen, A. D.; Nguyen, T. D.; Nguyen-Mau, C.; Nicol, M.; Niess, V.; Niet, R.; Nikitin, N.; Nikodem, T.; Novoselov, A.; O'Hanlon, D. P.; Oblakowska-Mucha, A.; Obratsov, V.; Ogilvy, S.; Okhrimenko, O.; Oldeman, R.; Onderwater, C. J. G.; Orlandea, M.; Otalora Goicochea, J. M.; Otto, A.; Owen, P.; Oyanguren, A.; Pal, B. K.; Palano, A.; Palombo, F.; Palutan, M.; Panman, J.; Papanestis, A.; Pappagallo, M.; Pappalardo, L. L.; Parkes, C.; Parkinson, C. J.; Passaleva, G.; Patel, G. D.; Patel, M.; Patrignani, C.; Pearce, A.; Pellegrino, A.; Penso, G.; Altarelli, M. Pepe; Perazzini, S.; Perret, P.; Pescatore, L.; Pesen, E.; Petridis, K.; Petrolini, A.; Picatoste Olloqui, E.; Pietrzyk, B.; Pilar, T.; Pinci, D.; Pistone, A.; Playfer, S.; Plo Casasus, M.; Polci, F.; Poluektov, A.; Polyakov, I.; Polycarpo, E.; Popov, A.; Popov, D.; Popovici, B.; Potterat, C.; Price, E.; Price, J. D.; Prisciandaro, J.; Pritchard, A.; Prouve, C.; Pugatch, V.; Navarro, A. Puig; Punzi, G.; Qian, W.; Rachwal, B.; Rademacker, J. H.; Rakotomiaramanana, B.; Rama, M.; Rangel, M. S.; Raniuk, I.; Rauschmayr, N.; Raven, G.; Redi, F.; Reichert, S.; Reid, M. M.; dos Reis, A. C.; Ricciardi, S.; Richards, S.; Rihl, M.; Rinnert, K.; Rives Molina, V.; Robbe, P.; Rodrigues, A. B.; Rodrigues, E.; Perez, P. Rodriguez; Roiser, S.; Romanovsky, V.; Romero Vidal, A.; Rotondo, M.; Rouvinet, J.; Ruf, T.; Ruiz, H.; Ruiz Valls, P.; Saborido Silva, J. J.; Sagidova, N.; Sail, P.; Saitta, B.; Salustino Guimaraes, V.; Sanchez Mayordomo, C.; Sanmartin Sedes, B.; Santacesaria, R.; Santamarina Rios, C.; Santovetti, E.; Sarti, A.; Satriano, C.; Satta, A.; Saunders, D. M.; Savrina, D.; Schiller, M.; Schindler, H.; Schlupp, M.; Schmelling, M.; Schmidt, B.; Schneider, O.; Schopper, A.; Schune, M. -H.; Schwemmer, R.; Sciascia, B.; Sciubba, A.; Semennikov, A.; Sepp, I.; Sena, N.; Serrano, J.; Sestini, L.; Seyfert, P.; Shapkin, M.; Shapoval, I.; Shcheglov, Y.; Shears, T.; Shekhtman, L.; Sheychenko, V.; Shires, A.; Coutinho, R. Silva; Simi, G.; Sirendi, M.; Skidmore, N.; Skillicorn, I.; Skwarnicki, T.; Smith, N. A.; Smith, E.; Smith, E.; Smith, J.; Smith, M.; Snoek, H.; Sokoloff, M. D.; Soler, F. J. P.; Soomro, F.; Souza, D.; Souza De Paula, B.; Spaan, B.; Spradlin, P.; Sridharan, S.; Stagni, F.; Stahl, M.; Stahl, S.; Steinkamp, O.; Stenyakin, O.; Sterpka, F.; Stevenson, S.; Stoica, S.; Stone, S.; Storaci, B.; Stracka, S.; Straticiuc, M.; Straumann, U.; Stroili, R.; Sun, L.; Sutcliffe, W.; Swientek, K.; Swientek, S.; Syropoulos, V.; Szczekowski, M.; Szczypka, P.; Szumlak, T.; T'Jampens, S.; Teklishyn, M.; Tellarini, G.; Teubert, F.; Thomas, C.; Thomas, E.; Van Tilburg, J.; Tisserand, V.; Tobin, M.; Todd, J.; Tolk, S.; Tomassetti, L.; Tonelli, D.; Topp-Joergensen, S.; Torr, N.; Tournefier, E.; Tourneur, S.; Tran, M. T.; Tresch, M.; Trisovic, A.; Tsaregorodtsev, A.; Tsopelas, P.; Tuning, N.; Garcia, M. Ubeda; Ukleja, A.; Ustyuzhanin, A.; Uwer, U.; Vacca, C.; Vagnoni, V.; Valenti, G.; Vallier, A.; Gomez, R. Vazquez; Vazquez Regueiro, P.; Vazquez Sierra, C.; Vecchi, S.; Velthuis, J. J.; Veltri, M.; Veneziano, G.; Vesterinen, M.; Barbosa, J. V. V. B. Viana; Viaud, B.; Vieira, D.; Vieites Diaz, M.; Vilasis-Cardona, X.; Vollhardt, A.; Volyanskyy, D.; Voong, D.; Vorobyev, A.; Vorobyev, V.; Voss, C.; de Vries, J. A.; Wraldi, R.; Wallace, C.; Wallace, R.; Walsh, J.; Wandernoth, S.; Wang, J.; Ward, D. R.; Watson, N. K.; Websdale, D.; Whitehead, M.; Wiedner, D.; Wilkinson, G.; Wilkinson, M.; Williams, M. P.; Williams, M.; Wilschut, H. W.; Wilson, F. F.; Wimberley, J.; Wishahi, J.; Wislicki, W.; Witek, M.; Wormser, G.; Wotton, S. A.; Wright, S.; Wyllie, K.; Xie, Y.; Xing, Z.; Xu, Z.; Yang, Z.; Yuan, X.; Yushchenko, O.; Zangoli, M.; Zavertyae, M.; Zhang, L.; Zhang, W. C.; Zhang, Y.; Zhelezov, A.; Zhokhov, A.; Zhong, L.

    2015-01-01

    Two structures are observed close to the kinematic threshold in the Xi(0)(b)pi(-) mass spectrum in a sample of proton-proton collision data, corresponding to an integrated luminosity of 3.0 fb(-1), recorded by the LEICb experiment. In the quark model, two baryonic resonances with quark content bds a

  7. SHAPING THE BROWN DWARF DESERT: PREDICTING THE PRIMORDIAL BROWN DWARF BINARY DISTRIBUTIONS FROM TURBULENT FRAGMENTATION

    Energy Technology Data Exchange (ETDEWEB)

    Jumper, Peter H.; Fisher, Robert T., E-mail: robert.fisher@umassd.edu [University of Massachusetts Dartmouth, 285 Old Westport Road, N. Dartmouth, MA 02747-2300 (United States)

    2013-05-20

    The formation of brown dwarfs (BDs) poses a key challenge to star formation theory. The observed dearth of nearby ({<=}5 AU) BD companions to solar mass stars, known as the BD desert, as well as the tendency for low-mass binary systems to be more tightly bound than stellar binaries, has been cited as evidence for distinct formation mechanisms for BDs and stars. In this paper, we explore the implications of the minimal hypothesis that BDs in binary systems originate via the same fundamental fragmentation mechanism as stars, within isolated, turbulent giant molecular cloud cores. We demonstrate analytically that the scaling of specific angular momentum with turbulent core mass naturally gives rise to the BD desert, as well as wide BD binary systems. Further, we show that the turbulent core fragmentation model also naturally predicts that very low mass binary and BD/BD systems are more tightly bound than stellar systems. In addition, in order to capture the stochastic variation intrinsic to turbulence, we generate 10{sup 4} model turbulent cores with synthetic turbulent velocity fields to show that the turbulent fragmentation model accommodates a small fraction of binary BDs with wide separations, similar to observations. Indeed, the picture which emerges from the turbulent fragmentation model is that a single fragmentation mechanism may largely shape both stellar and BD binary distributions during formation.

  8. Laser-guided repair of complex bile duct strictures.

    NARCIS (Netherlands)

    Gulik, T. van; Beek, J.; Reuver, P. de; Aronson, D.C.; Delden, O. van; Busch, O.; Gouma, D.

    2009-01-01

    BACKGROUND: The repair of bile duct strictures (BDS) requires identification of healthy bile duct proximal to the stenosis. Identification may be difficult in complex bile duct injuries after cholecystectomy or partial liver resection. AIM: We describe a technique to identify the prestenotic bile du

  9. WISE/2MASS-SDSS Brown Dwarfs candidates using Virtual Observatory tools

    CERN Document Server

    Aberasturi, M; Martin, E L

    2011-01-01

    Massive imaging surveys in different passbands are the main contributors to the discovery of brown dwarfs (BDs). The Virtual Observatory (VO) represents an adequate framework to efficiently handle these vast datasets and filter them out according to specific requirements. Having an statistically significant number of BDs is mandatory to better understand their general properties as well as to identify peculiar objects. WISE, an all-sky survey in the infrared, provides an excellent opportunity to significantly increase the number of BDs, in particular those at the lower end of the temperature scale. The main aim of this work is to demonstrate that VO tools are efficient to identify BDs by cross correlating public catalogues released by large imaging surveys. Using VO tools we have performed a cross-match of the WISE Preliminary Release, the 2MASS Point Source and SDSS Data Release 7 catalogues over the whole area of sky that they have in common. Photometric and proper motion criteria were used to obtain a list...

  10. Status of the CLIC Beam Delivery System

    CERN Document Server

    Tomás, R; Resta López, J; Rumolo, G; Schulte, D; Schuler, P; Bolzon, B; Brunetti, L; Brunetti, L; Geffroy, N; Jeremie, A; Seryi, A; Angal-Kalinin, D; Jackson, F

    2010-01-01

    The CLIC Beam Delivery System (BDS) is experiencing the careful revision from a large number of world wide experts. This was particularly enhanced by the successful CLIC’08 workshop held at CERN. Numerous new ideas, improvements and critical points are arising, establishing the path towards the Conceptual Design Report by 2010.

  11. Precision Analysis of BeiDou Region Navigation and Positioning%北斗区域导航定位精度分析

    Institute of Scientific and Technical Information of China (English)

    曾琪; 何俊

    2015-01-01

    采用全球均匀分布MGEX站的观测数据,详细分析了北斗卫星导航系统(BDS)的卫星可见性、PDOP 值分布,以及伪距单点定位精度,并将其结果与GPS和BDS+GPS组合系统进行了比较分析,讨论了不同定权方法对 BDS+GPS 组合系统定位精度的影响. 试验结果表明,在全球大部分地区,GPS的定位性能优于北斗系统,在亚太中低纬度地区,BDS的定位精度与GPS相当甚至超过GPS;BDS+GPS组合系统的定位精度通常优于单一系统,但随机模型不准确也可能导致组合系统的定位精度不如单系统;Helmert方差分量估计可以在一定程度上提高组合定位精度.

  12. BeiDou inter-satellite-type bias evaluation and calibration for mixed receiver attitude determination

    NARCIS (Netherlands)

    Nadarajah, N.; Teunissen, P.J.G.; Raziq, N.

    2013-01-01

    The Chinese BeiDou system (BDS), having different types of satellites, is an important addition to the ever growing system of Global Navigation Satellite Systems (GNSS). It consists of Geostationary Earth Orbit (GEO) satellites, Inclined Geosynchronous Satellite Orbit (IGSO) satellites and Medium Ea

  13. The Open Service Signal in Space Navigation Data Comparison of the Global Positioning System and the BeiDou Navigation Satellite System

    Directory of Open Access Journals (Sweden)

    Shau-Shiun Jan

    2014-08-01

    Full Text Available More and more Global Navigation Satellite Systems (GNSSs have been developed and are in operation. Before integrating information on various GNSSs, the differences between the various systems must be studied first. This research focuses on analyzing the navigation data differences between the Chinese BeiDou Navigation Satellite System (BDS and the United States’ Global Positioning System (GPS. In addition to explaining the impact caused by these two different coordinate and time systems, this research uses an actual open service signal in space (SIS for both GPS and BDS to analyze their current system performance. Five data quality analysis (DQA mechanisms are proposed in this research to validate both systems’ SIS navigation data. These five DQAs evaluate the differences in ephemeris and almanac messages from both systems for stability and accuracy. After all of the DQAs, the different issues related to GPS and BDS satellite information are presented. Finally, based on these DQA results, this research provides suggested resolutions for the combined use of GPS and BDS for navigation and guidance.

  14. Israel: Background and U.S. Relations

    Science.gov (United States)

    2013-11-01

    42 Several reports identify Hezbollah as the perpetrator of the July 2012 suicide bus bombing in...country will lose its claim to be a democracy. It will, says Mr. Peres, become a ‘pariah’, just as South Africa did. The BDS [ boycott , divestment

  15. 78 FR 64569 - Self-Regulatory Organizations; NASDAQ OMX PHLX LLC; Notice of Filing and Immediate Effectiveness...

    Science.gov (United States)

    2013-10-29

    ...,'' Antitrust Law Journal, Vol. 70, No. 3 (2003). An exchange's BD customers view the costs of transaction... enable them to attract ``eyeballs'' that contribute to their advertising revenue. Retail BDs, such as... them to attract ``eyeballs'' that contribute to their advertising revenue. Retail broker-dealers,...

  16. Entrepreneurship Encouragement and Business Development Support at Universities and Science Parks: Proposal for a New Conceptualization

    Science.gov (United States)

    Arroyo-Vazquez, Monica; van der Sijde, Peter

    2008-01-01

    New stakeholders and new roles for old stakeholders have emerged with the development of entrepreneurial universities. A new systemic framework is therefore required which includes these various stakeholders and their goals and thus gives a clear picture of the process of entrepreneurship encouragement and business development support (EE&BDS).…

  17. Dynamics of water-alcohol mixtures: Insights from nuclear magnetic resonance, broadband dielectric spectroscopy, and triplet solvation dynamics

    Energy Technology Data Exchange (ETDEWEB)

    Sauer, D.; Schuster, B.; Rosenstihl, M.; Schneider, S.; Blochowicz, T.; Stühn, B.; Vogel, M. [Institut für Festkörperphysik, Technische Universität Darmstadt, Hochschulstraße 6, 64289 Darmstadt (Germany); Talluto, V.; Walther, T. [Institut für Angewandte Physik, Technische Universität Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt (Germany)

    2014-03-21

    We combine {sup 2}H nuclear magnetic resonance (NMR), broadband dielectric spectroscopy (BDS), and triplet solvation dynamics (TSD) to investigate molecular dynamics in glass-forming mixtures of water and propylene glycol in very broad time and temperature ranges. All methods yield consistent results for the α process of the studied mixtures, which hardly depends on the composition and shows Vogel-Fulcher temperature dependence as well as Cole-Davidson spectral shape. The good agreement between BDS and TDS data reveals that preferential solvation of dye molecules in microheterogeneous mixtures does not play an important role. Below the glass transition temperature T{sub g}, NMR and BDS studies reveal that the β process of the mixtures shows correlation times, which depend on the water concentration, but exhibit a common temperature dependence, obeying an Arrhenius law with an activation energy of E{sub a} = 0.54  eV, as previously reported for mixtures of water with various molecular species. Detailed comparison of NMR and BDS correlation functions for the β process unravels that the former decay faster and more stretched than the latter. Moreover, the present NMR data imply that propylene glycol participates in the β process and, hence, it is not a pure water process, and that the mechanism for molecular dynamics underlying the β process differs in mixtures of water with small and large molecules.

  18. Bubble detector's evaluation for neutron field measurement in a very known source

    Energy Technology Data Exchange (ETDEWEB)

    Ramalho, Eduardo; Silva, Ademir X. da, E-mail: ademir@nuclear.ufrj.b, E-mail: jdantas@con.ufrj.b [Coordenacao dos Programas de Pos-Graduacao de Engenharia (PEN/COPPE/UFRJ), RJ (Brazil). Programa de Engenharia Nuclear; Reina, Luiz, E-mail: reina@ien.gov.b [Instituto de Engenharia Nuclear (IEN/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Facure, Alessandro, E-mail: facure@cnen.gov.b [Comissao Nacional de Energia Nuclear (CNEN), Rio de Janeiro, RJ (Brazil)

    2011-07-01

    Measurements on neutron fields, mainly for dosimetric purposes, have been a major concern for ionizing radiation workers, because of the radiation protection issues. The present work aims to study the using of bubble detectors in neutron dosimetry and the Bubble Detector Spectrometer (BDS) was chosen for this task. Several experiments were performed in order to obtain spectra from such devices and their respective analysis and then they were compared to those which were obtained by other ways. An Am-Be calibration neutron source from Instituto de Radioprotecao e Dosimetria/Comissao Nacional de Energia Nuclear (IRD/CNEN) was used and its spectrum was compared to the one obtained by BDS. The possibility of the use of such devices as ambient dosimeters was also evaluated. Despite the uncertainties, especially in the lowest energy thresholds, the spectrum from BDS is in good agreement with the known ones and the use of BDS as a dosimeter demands a more detailed study due to some characteristics of the Am-Be source that produce high uncertainties in low energy thresholds. (author)

  19. Simultaneous approximation by certain Baskakov–Durrmeyer–Stancu operators

    Directory of Open Access Journals (Sweden)

    Vijay Gupta

    2012-10-01

    Full Text Available In the present paper, we establish some direct results in simultaneous approximation for Baskakov–Durrmeyer–Stancu (abbr. BDS operators Dn(α,β(f,x. We establish point-wise convergence, Voronovskaja type asymptotic formula and an error estimate in terms of second order modulus of continuity of the function.

  20. The large-scale disk fraction of brown dwarfs in the Taurus cloud as measured with Spitzer

    CERN Document Server

    Monin, J -L; Pinte, C; Rebull, L; Goldsmith, P; Fukagawa, M; Ménard, F; Padgett, D; Stappelfeld, K; McCabe, C; Carey, S; Noriega-Crespo, A; Brooke, T; Huard, T; Terebey, S; Hillenbrand, L; Guedel, M

    2010-01-01

    Aims. The brown dwarf (BD) formation process has not yet been completely understood. To shed more light on the differences and similarities between star and BD formation processes, we study and compare the disk fraction among both kinds of objects over a large angular region in the Taurus cloud. In addition, we examine the spatial distribution of stars and BD relative to the underlying molecular gas Methods. In this paper, we present new and updated photometry data from the Infrared Array Camera (IRAC) aboard the Spitzer Space Telescope on 43 BDs in the Taurus cloud, and recalculate of the BD disk fraction in this region. We also useed recently available CO mm data to study the spatial distribution of stars and BDs relative to the cloud's molecular gas. Results. We find that the disk fraction among BDs in the Taurus cloud is 41 \\pm 12%, a value statistically consistent with the one among TTS (58 \\pm 9%). We find that BDs in transition from a state where they have a disk to a diskless state are rare, and we st...

  1. 北斗卫星导航系统在海事系统中的应用及展望%The Application and the Prospect of Beidou in Maritime Affairs

    Institute of Scientific and Technical Information of China (English)

    陈庆华; 张安民; 张永兵

    2016-01-01

    北斗卫星导航系统以其精准定位、定时和短报文收发能力,将导航、定时和通信有机融合在一起,为海事业务处理提供了极大的便利。本文简要阐述了北斗卫星导航系统在船舶管理、海事搜救、移动执法、载运货物管理等海事业务中的应用,并展望了北斗卫星导航系统在不同海事业务中将可发挥的巨大潜能。%Beidou Navigation Satellite System (BDS),with the ability of accurate positioning and short message transmission and receiving,combines navigation with communication,which makes its wide utility in the maritime affairs. The application of BDS in several different maritime affairs,such as management of the ships,maritime search,mobile execution,and goods managements. Analyzing the application of BDS in the fields of maritime affairs,a great potential utility of BDS can be expected.

  2. Applications of two-way satellite time and frequency transfer in the BeiDou navigation satellite system

    Science.gov (United States)

    Zhou, ShanShi; Hu, XiaoGong; Liu, Li; Guo, Rui; Zhu, LingFeng; Chang, ZhiQiao; Tang, ChengPan; Gong, XiuQiang; Li, Ran; Yu, Yang

    2016-10-01

    A two-way satellite time and frequency transfer (TWSTFT) device equipped in the BeiDou navigation satellite system (BDS) can calculate clock error between satellite and ground master clock. TWSTFT is a real-time method with high accuracy because most system errors such as orbital error, station position error, and tropospheric and ionospheric delay error can be eliminated by calculating the two-way pseudorange difference. Another method, the multi-satellite precision orbit determination (MPOD) method, can be applied to estimate satellite clock errors. By comparison with MPOD clock estimations, this paper discusses the applications of the BDS TWSTFT clock observations in satellite clock measurement, satellite clock prediction, navigation system time monitor, and satellite clock performance assessment in orbit. The results show that with TWSTFT clock observations, the accuracy of satellite clock prediction is higher than MPOD. Five continuous weeks of comparisons with three international GNSS Service (IGS) analysis centers (ACs) show that the reference time difference between BeiDou time (BDT) and golbal positoning system (GPS) time (GPST) realized IGS ACs is in the tens of nanoseconds. Applying the TWSTFT clock error observations may obtain more accurate satellite clock performance evaluation in the 104 s interval because the accuracy of the MPOD clock estimation is not sufficiently high. By comparing the BDS and GPS satellite clock performance, we found that the BDS clock stability at the 103 s interval is approximately 10-12, which is similar to the GPS IIR.

  3. An orally active Cannabis extract with high content in cannabidiol attenuates chemical induced intestinal inflammation and hypermotility in the mouse

    Directory of Open Access Journals (Sweden)

    Ester Pagano

    2016-10-01

    Full Text Available Anecdotal and scientific evidence suggests that Cannabis use may be beneficial in inflammatory bowel disease (IBD patients. Here, we have investigated the effect of a standardized Cannabis sativa extract with high content of cannabidiol (CBD, here named CBD BDS for CBD botanical drug substance, on mucosal inflammation and hypermotility in mouse models of intestinal inflammation. Colitis was induced in mice by intracolonic administration of dinitrobenzenesulfonic acid (DNBS. Motility was evaluated in the experimental model of intestinal hypermotility induced by irritant croton oil. CBD BDS or pure CBD were given - either intraperitoneally or by oral gavage - after the inflammatory insult (curative protocol. The amounts of CBD in the colon, brain and liver after the oral treatments were measured by HPLC coupled to ion trap-time of flight mass spectrometry. CBD BDS, both when given intraperitoneally and by oral gavage, decreased the extent of the damage (as revealed by the decrease in the colon weight/length ratio and myeloperoxidase activity in the DNBS model of colitis. It also reduced intestinal hypermotility (at doses lower than those required to affect transit in healthy mice in the croton oil model of intestinal hypermotility. Under the same experimental conditions, pure CBD did not ameliorate colitis while it normalized croton oil-induced hypermotility when given intraperitoneally (in a dose-related fashion or orally (only at one dose. In conclusion, CBD BDS, given after the inflammatory insult, attenuates injury and motility in intestinal models of inflammation. These findings sustain the rationale of combining CBD with other minor Cannabis constituents and support the clinical development of CBD BDS for IBD treatment.

  4. Expression and new exon mutations of the human Beta defensins and their association on colon cancer development.

    Directory of Open Access Journals (Sweden)

    Abdelhabib Semlali

    Full Text Available The development of cancer involves genetic predisposition and a variety of environmental exposures. Genome-wide linkage analyses provide evidence for the significant linkage of many diseases to susceptibility loci on chromosome 8p23, the location of the human defensin gene cluster. Human β-defensins (hBDs are important molecules of innate immunity. This study was designed to analyze the expression and genetic variations in hBDs (hBD-1, hBD-2, hBD-3 and hBD-4 and their putative association with colon cancer. hBD gene expression and relative protein expression were evaluated by Real-Time polymerase chain reaction (qPCR and immunohistochemistry, respectively, from 40 normal patients and 40 age-matched patients with colon cancer in Saudi Arabia. In addition, hBD polymorphisms were genotyped by exon sequencing and by promoter methylation. hBD-1, hBD-2, hBD-3 and hBD-4 basal messenger RNA expression was significantly lower in tumor tissues compared with normal tissues. Several insertion mutations were detected in different exons of the analyzed hBDs. However, no methylation in any hBDs promoters was detected because of the limited number of CpG islands in these regions. We demonstrated for the first time a link between hBD expression and colon cancer. This suggests that there is a significant link between innate immunity deregulation through disruption of cationic peptides (hBDs and the potential development of colon cancer.

  5. Antibiotic overusage and resistance: A cross-sectional survey among pediatric dentists

    Directory of Open Access Journals (Sweden)

    Sapna Konde

    2016-01-01

    Full Text Available Introduction: Most human orofacial infections originate from odontogenic infections and prescribing antibiotics has become a ubiquitous phenomenon. The World Health Organization (WHO has recognized the inappropriate, indiscriminate, and irrational use of antibiotics leading to antibiotic resistance as a global problem. Objective: The objective of this survey is to compare the antibiotic prescription pattern and the awareness of antibiotic resistance among Bachelor of Dental Surgery (BDS practitioners and pediatric dentists. Materials and methods: A hundred BDS practitioners and 100 pediatric dentists included in the study were given a questionnaire containing both open-ended and closed-ended questions. The questionnaire comprised information pertaining to antibiotic prescription for most common oral conditions, commonly prescribed antibiotics, their dosage, etc. Results: The majority of the practitioners prescribed antibiotics for managing oral diseases. On comparing the prescription patterns between the BDS practitioners and pediatric dentists, there was an overprescription in the BDS group for many conditions, which was statistically significant. Amoxicillin was the most commonly prescribed drug in both the groups. In the presence of an anaerobic infection, the most preferred drug was a combination of amoxicillin and clavulanic acid with metronidazole. With regard to the duration of antibiotic prescription, 74% BDS practitioners prescribed antibiotics as a 3-day course and 60% pediatric dentists resorted to a 5-day course, which was statistically significant. The awareness regarding antibiotic prophylaxis and antibiotic resistance was found to be adequate in both the groups. However, there was a general lack of awareness with regard to the guidelines for antibiotic prescribing in both the groups. Conclusion: Practitioners should prescribe antibiotics in accordance with the guidelines to curb antibiotic resistance, an emerging public health

  6. An Orally Active Cannabis Extract with High Content in Cannabidiol attenuates Chemically-induced Intestinal Inflammation and Hypermotility in the Mouse

    Science.gov (United States)

    Pagano, Ester; Capasso, Raffaele; Piscitelli, Fabiana; Romano, Barbara; Parisi, Olga A.; Finizio, Stefania; Lauritano, Anna; Marzo, Vincenzo Di; Izzo, Angelo A.; Borrelli, Francesca

    2016-01-01

    Anecdotal and scientific evidence suggests that Cannabis use may be beneficial in inflammatory bowel disease (IBD) patients. Here, we have investigated the effect of a standardized Cannabis sativa extract with high content of cannabidiol (CBD), here named CBD BDS for “CBD botanical drug substance,” on mucosal inflammation and hypermotility in mouse models of intestinal inflammation. Colitis was induced in mice by intracolonic administration of dinitrobenzenesulfonic acid (DNBS). Motility was evaluated in the experimental model of intestinal hypermotility induced by irritant croton oil. CBD BDS or pure CBD were given - either intraperitoneally or by oral gavage – after the inflammatory insult (curative protocol). The amounts of CBD in the colon, brain, and liver after the oral treatments were measured by high-performance liquid chromatography coupled to ion trap-time of flight mass spectrometry. CBD BDS, both when given intraperitoneally and by oral gavage, decreased the extent of the damage (as revealed by the decrease in the colon weight/length ratio and myeloperoxidase activity) in the DNBS model of colitis. It also reduced intestinal hypermotility (at doses lower than those required to affect transit in healthy mice) in the croton oil model of intestinal hypermotility. Under the same experimental conditions, pure CBD did not ameliorate colitis while it normalized croton oil-induced hypermotility when given intraperitoneally (in a dose-related fashion) or orally (only at one dose). In conclusion, CBD BDS, given after the inflammatory insult, attenuates injury and motility in intestinal models of inflammation. These findings sustain the rationale of combining CBD with other minor Cannabis constituents and support the clinical development of CBD BDS for IBD treatment. PMID:27757083

  7. An Orally Active Cannabis Extract with High Content in Cannabidiol attenuates Chemically-induced Intestinal Inflammation and Hypermotility in the Mouse.

    Science.gov (United States)

    Pagano, Ester; Capasso, Raffaele; Piscitelli, Fabiana; Romano, Barbara; Parisi, Olga A; Finizio, Stefania; Lauritano, Anna; Marzo, Vincenzo Di; Izzo, Angelo A; Borrelli, Francesca

    2016-01-01

    Anecdotal and scientific evidence suggests that Cannabis use may be beneficial in inflammatory bowel disease (IBD) patients. Here, we have investigated the effect of a standardized Cannabis sativa extract with high content of cannabidiol (CBD), here named CBD BDS for "CBD botanical drug substance," on mucosal inflammation and hypermotility in mouse models of intestinal inflammation. Colitis was induced in mice by intracolonic administration of dinitrobenzenesulfonic acid (DNBS). Motility was evaluated in the experimental model of intestinal hypermotility induced by irritant croton oil. CBD BDS or pure CBD were given - either intraperitoneally or by oral gavage - after the inflammatory insult (curative protocol). The amounts of CBD in the colon, brain, and liver after the oral treatments were measured by high-performance liquid chromatography coupled to ion trap-time of flight mass spectrometry. CBD BDS, both when given intraperitoneally and by oral gavage, decreased the extent of the damage (as revealed by the decrease in the colon weight/length ratio and myeloperoxidase activity) in the DNBS model of colitis. It also reduced intestinal hypermotility (at doses lower than those required to affect transit in healthy mice) in the croton oil model of intestinal hypermotility. Under the same experimental conditions, pure CBD did not ameliorate colitis while it normalized croton oil-induced hypermotility when given intraperitoneally (in a dose-related fashion) or orally (only at one dose). In conclusion, CBD BDS, given after the inflammatory insult, attenuates injury and motility in intestinal models of inflammation. These findings sustain the rationale of combining CBD with other minor Cannabis constituents and support the clinical development of CBD BDS for IBD treatment.

  8. 基于北斗卫星的预警信息发布技术研究及实现%Technology and Implementation of Warning Information Distribution Based on Beidou Satellite

    Institute of Scientific and Technical Information of China (English)

    王春芳; 陈永涛; 李春来; 蒋克俭

    2014-01-01

    利用北斗卫星短报文通信功能,以广播方式发布预警信息,可提高预警信息的覆盖范围和时效性,填补我国海洋及陆地边远地区预警信息发布空白。但北斗卫星预警信息发布存在传输速率低、冗余信息量大、长预警信息发布成功率低的问题。该文对北斗卫星预警信息发布系统的系统结构、协议体系和关键问题开展研究,通过指挥机并联、预警信息编码、影响区域识别、联合补包等方法,解决了北斗卫星预警信息发布系统建设的关键问题。在此基础上,该文设计了预警信息网络发布协议、预警信息北斗发布协议和预警信息北斗传输协议,并开发了原型系统。%Warning information distribution (WID)is a key aspect in effective disaster risk reduction.All coun-tries in the world are engaged in establishment and improvement of WID system over all kinds of transmis-sion media.China has established an effective meteorological WID system based on radio,television,tele-phone,Internet,short message service,LED screen,village horn,etc.The system will be upgraded into a national level public emergencies WID system for all hazard events.But due to signal coverage,some areas of China are still uncovered and the time effect of WID still needs improving. Beidou satellite (BDS)is a navigation satellite system of China with short message communication ca-pability.Its communication signal can cover all Chinese territory and surrounding areas.BDS has two communication methods,peer to peer and broadcast.The broadcast manner is of great value in improving the coverage and time effect of WID in China,especially in marine and distant land areas. However,WID based on BDS has some key problems such as low transmission rate,huge amount of redundant information (having no relevance to local area)and low reliability of long message distribution. To solve these problems,improved schemes are proposed on the system

  9. Fully biodegradable coronary stents : progress to date.

    Science.gov (United States)

    Ramcharitar, Steve; Serruys, Patrick W

    2008-01-01

    The limitations of currently available metallic drug-eluting stents have renewed interest in biodegradable stents (BDS). Apart from removing the (offending) foreign material that may potentiate a thrombotic event, BDS have the advantage of avoiding 'full metal jackets,' and thus can preclude subsequent coronary surgery. In addition, they do not interfere with the diagnostic evaluation of non-invasive imaging such as cardiac magnetic resonance and CT. There are now several BDS in development or in clinical trials that incorporate a variety of biodegradable polymer technologies. Two broad categories of materials are generally used: those made from organic biopolymers and those made from corrodible metals. However, to date, none of the materials/stents tested have been able to establish a perfect balance between biocompatibility, the kinetics of degradation needed to maintain mechanical strength to limit recoil, and inflammation. However, studies, such as the ABSORB trial with the everolimus eluting poly-L-lactide stent, which demonstrated comparable restenotic rates with bare metallic stents and a low incidence of major adverse cardiac events (MACE) at 12 months of 3.3%, with only one patient having a non-Q-wave myocardial infarction and no target lesion revascularization, suggest that there has been significant progress with respect to the earlier prototypes. The acute recoil observed could potentially be addressed with the polytyrosine REVA stent currently being evaluated in the RESORB trial, which incorporates a novel locking mechanism within its design. Alternative BDS designs include the combination of an antiproliferative drug with endothelial progenitor cell capturing antibodies to facilitate epithelialization and/or dual eluting having, in addition to the antiproliferative drug, polymeric salicyclic acid to limit inflammation. Compared with biodegradable polymers, there are fewer metals used in the manufacture of BDS. The only metal BDS in trials is the

  10. Precise orbit determination for quad-constellation satellites at Wuhan University: strategy, result validation, and comparison

    Science.gov (United States)

    Guo, Jing; Xu, Xiaolong; Zhao, Qile; Liu, Jingnan

    2016-02-01

    This contribution summarizes the strategy used by Wuhan University (WHU) to determine precise orbit and clock products for Multi-GNSS Experiment (MGEX) of the International GNSS Service (IGS). In particular, the satellite attitude, phase center corrections, solar radiation pressure model developed and used for BDS satellites are addressed. In addition, this contribution analyzes the orbit and clock quality of the quad-constellation products from MGEX Analysis Centers (ACs) for a common time period of 1 year (2014). With IGS final GPS and GLONASS products as the reference, Multi-GNSS products of WHU (indicated by WUM) show the best agreement among these products from all MGEX ACs in both accuracy and stability. 3D Day Boundary Discontinuities (DBDs) range from 8 to 27 cm for Galileo-IOV satellites among all ACs' products, whereas WUM ones are the largest (about 26.2 cm). Among three types of BDS satellites, MEOs show the smallest DBDs from 10 to 27 cm, whereas the DBDs for all ACs products are at decimeter to meter level for GEOs and one to three decimeter for IGSOs, respectively. As to the satellite laser ranging (SLR) validation for Galileo-IOV satellites, the accuracy evaluated by SLR residuals is at the one decimeter level with the well-known systematic bias of about -5 cm for all ACs. For BDS satellites, the accuracy could reach decimeter level, one decimeter level, and centimeter level for GEOs, IGSOs, and MEOs, respectively. However, there is a noticeable bias in GEO SLR residuals. In addition, systematic errors dependent on orbit angle related to mismodeled solar radiation pressure (SRP) are present for BDS GEOs and IGSOs. The results of Multi-GNSS combined kinematic PPP demonstrate that the best accuracy of position and fastest convergence speed have been achieved using WUM products, particularly in the Up direction. Furthermore, the accuracy of static BDS only PPP degrades when the BDS IGSO and MEO satellites switches to orbit-normal orientation

  11. Studies on the Chemical Constituents of Ferula songorica%阿魏的化学成分研究

    Institute of Scientific and Technical Information of China (English)

    胡跃; 李晓东; 李国玉; 李肖宇; 张珂; 左文健; 曾毅梅; 王金辉

    2009-01-01

    目的:研究准格尔阿魏Ferula songorica Pall.ex Spren in Roem.et Schult的化学成分.方法:利用各种色谱方法进行分离纯化,根据波谱解析、理化常数分析及文献对照进行结构鉴定.结果:从阿魏根茎95%乙醇提取物中分离得到3个化合物,分别为2,4-二羟基-α-氧代-苯乙酸(1),3,3',4,4'-联苯四甲酸(2),2,4-二羟基苯甲酮(3).结论:化合物2是新天然产物,化合物1为首次从该植物中分离得到.%Objective: To study the chemical constituents from the rhizome of Ferula songorica Pall. ex Spreng. in Roam. et Schult.. Methods: The constituents were isolated by chromatography methods such as silica gel,Sephadex LH-20, ODS column and HPLC. Physico-chemical properties and spectroscopic analysis were employed for the structural identification. Results:Three compounds were obtained and their structure were identified as 2,4-di-hydroxy-α-oxo-phenylaectic acid ( 1 ), 3,3 ; 4, 4'-biphenyhetracarboxylic acid ( 2 ), 2,4-dihydroxyacetophenone ( 3 ).Conclusion: Among these compounds, compound 2 is a new natural products and compound 1 is isolated from rhizome of Ferula songorica Pall. ex Spreng. in Roem. et Schult. for the first time.

  12. Can breathing circuit filters help prevent the spread of influenza A (H1N1) virus from intubated patients?

    Science.gov (United States)

    Heuer, Jan F; Crozier, Thomas A; Howard, Glenn; Quintel, Michael

    2013-01-01

    Zielsetzung: Im März 2010 berichteten weltweit mehr als 213 Länder über laborchemisch bestätigte Influenza H1N1-Infektionen mit mindestens 16.813 Toten. In einigen Ländern wurden rund 10 bis 30% der hospitalisierten Patienten auf eine Intensivstation aufgenommen und bis zu 70% dieser Patienten benötigten eine mechanische Beatmung. Es stellt sich die Frage, ob Beatmungsfilter in der Lage sind Viruspartikel von einem infizierten Patienten daran zu hindern, das Beatmungsgerät sowie die Raumluft zu kontaminieren. Wir untersuchten Filter, die routinemäßig in unserer Abteilung benutzt werden, auf ihre Wirksamkeit und Effizienz hinsichtlich des Influenza Virus H1N1 (A/PR/8/34)). Methoden: Laboruntersuchungen von drei Filtern (PALL Ultipor(®) 25, Ultipor(®) 100 und Pall BB50T Beatmungsfilter, hergestellt von Pall Life Sciences) unter Verwendung eines monodispersen Aerosols von Influenza A (H1N1) Virus in einem Luftströmungsmodel mit Viruspartikeln quantifiziert als zytopathologische Effekte in kultivierten Kaninchen-Nierenzellen (MDCK). Ergebnisse: Die initiale Viruslast von 7.74±0.27 log10 wurde hinter den Filtern auf eine Viruslast von ≤2.43 log10 reduziert. Dieses Ergebnis entspricht einer Virusfiltration von ≥99.9995%.Schlussfolgerung: Die drei getesteten Filter verhinderten eine Ausbreitung des Virus, es deutet also daraufhin, dass die Verwendung dieser Filter das Risiko einer Virusübertragung von intubierten und beatmeten Patienten an das Beatmungsgerät und die Raumluft reduzieren kann.

  13. 芍药叶的黄酮提取工艺研究%The Study of Extracting Flavone from Leaves of Peony

    Institute of Scientific and Technical Information of China (English)

    袁云香; 王建鹏

    2016-01-01

    To investigate the availability of the Paeonia lactiflora Pall leaves flavonoids , the leaves of Paeonia lactiflora Pall as raw material and organic solvent were wsed to extract the flavones in its leaves water bath method . To optimize extraction process of total flavonoids from Paeonia lactiflora Pall, the effects of influencial factors on to-tal flavonoids concentration were discussed by single factor test and orthogonal designed experiments .The optimal condition for total flavonoids extraction was solid-liquid ratio 1∶25, ethanol concentration 70%, extraction duration 1.5 h and extraction temperature 70 ℃.Under this condition , the flavonoids extraction efficiency was 4.687%.%为了研究芍药叶黄酮的可利用性,以芍药叶片为原料,采用有机溶剂水浴法来提取芍药叶中的黄酮。采用单因素实验法和正交实验法,对芍药叶中的黄酮的提取率进行了研究。研究结果显示,芍药叶黄酮的最适提取条件为:固液比是1∶25、乙醇的体积分数是70%、提取温度是70℃、提取时间是1.5 h。提取率达4.687%。

  14. Cell-baswd non-invasive prenatal testing

    DEFF Research Database (Denmark)

    Uldbjerg, Niels; Singh, Ripudaman; Christensen, Rikke;

    CONTROL ID: 2520273 ABSTRACT FINAL ID: OC06.03 TITLE: Cell based Non-invasive Prenatal Testing (NIPT) AUTHORS (FIRST NAME, LAST NAME): Niels Uldbjerg2, Ripudaman Singh4, Rikke Christensen3, Palle Schelde4, Ida Vogel1, Else Marie Vestergaard3, Lotte Hatt4, Steen Kølvrå4 INSTITUTIONS (ALL): 1....... Department of Clinical Genetics, Aarhus University Hospital, Aarhus N, none, Denmark. 2. Obstetrics and Gynecology, Aarhus University Hospital Skejby, Aarhus, Denmark. 3. Clinical Genetics, Aarhus University Hospital, Aarhus, Denmark. 4. Arcedi Biotech Aps, Aarhus, Denmark. ABSTRACT BODY: Objectives: NIPT...

  15. Chromatographic determination of radiochemical purity. Replacement of ITLC SG; Chromatographische Bestimmung der radiochemischen Reinheit von Radiopharmaka. Alternativen zu ITLC SG

    Energy Technology Data Exchange (ETDEWEB)

    Wunderlich, G.; Herrling, P.; Kotzerke, J. [Universitaetsklinikum Carl Gustav Carus, Technische Univ. Dresden (Germany). Klinik und Poliklinik fuer Nuklearmedizin; Zuern, A.; Anders, P. [ROTOP Pharmaka AG, Radeberg (Germany)

    2010-07-01

    Thin layer chromatography is well established for quality control of radiopharmaceuticals. A convenient and widely used stationary phase are ITLC SG strips. However, the Pall Corporation stopped manufacturing of the silica gel impregnated glass fibre strips (ITLC SG). Material, Methods: As a replacement we tested silicic acid impregnated glass fibre strips from Varian (ITLC SA) and sufficient mobile phases. Results: The chromatography with these strips takes two to three times longer than with ITLC SG, but it is in an acceptable range. Only three mobile phases are necessary to test most of the common in-house made radiopharmaceuticals. Conclusion: The proposed method is suitable for routinely measuring the radiochemical purity of radiophamaceuticals.

  16. Geochemistry of surficial sediments along the central southwest coast of India - Seasonal changes in regional distribution

    Digital Repository Service at National Institute of Oceanography (India)

    Balachandran, K.K.; Joseph, T.; Nair, M; Sankaranarayanan, V.N.; Das, V.K.; Sheeba, P

    .N. Sankaranarayanan, V. Kesavadas and P. Sheeba Kational Institute of Oceanography Regional Centre P.O. Box. 1616 Cochin-682 014. India ABSTRAcr _ BALACHANDRAN. KK.; JOSEPH, T.; NAIR. M.; SAl\\'KARA.,\\,ARAYANAIIo", V.N.: KESAVADAS, V., and SHEER.';, P., 2003...-earth element;; in the fluvial fraction « 4 IJ-m) that also date back to one~ct of sampling during 1981. Inadequacies in all the above stud ies have been their proper addressing of the influence 'If Seasonal Analysis of Sediment Geochemistry 665 Legend: PALL...

  17. Reconsidering Figurative, Graphic Art of the 1950s Danish Art Scene

    DEFF Research Database (Denmark)

    Burmeister Kaaring, Liza

    2013-01-01

    entitled Mennesket (Man), and featured figurative, graphic art, concerned with depictions of the human figure and with the post-war psychological condition of the individual human being. Among the artists were Palle Nielsen, Svend Wiig Hansen, Dan Sterup-Hansen and Henry Heerup. The exhibitions took place......The article contributes to a revision of today’s understanding of the 1950s Danish art scene. By presenting three exhibitions and analysing the reception of them, I point out that figurative art enjoyed a much more central role than later accounts have recognised. All three exhibitions were...

  18. User’s Manual for the AFSATCOM Terminal Upgrades Life Cycle Cost Model. Volume I.

    Science.gov (United States)

    1981-10-01

    roimber ot groupings. onuly the average - 11(1 to he1 ,pecif ie elt br mo, of the parameters A c r-,e Lt. I I ! iew. thev lidit it-tt lonl anld class if...training by the production contractor; - Type 2 is Air Force service training performed by Type 1 trainees ; - Recurring training is that necessitated...class hours per day for a type 2 training class. PALl = average daily pay and allowance during training for a type I trainee . PAL2B = average daily pay

  19. Drip Irrigation Conditions within the Scope of Mixed Deposited Salt Resistant to Salt Grass and the Changing Trend of Salt%滴灌条件下积盐范围内混种耐盐草及盐分变化趋势的研究

    Institute of Scientific and Technical Information of China (English)

    穆哈西; 赛尔江·乌尔曼别克

    2011-01-01

    以pH=7.9的水作为灌溉水源,土壤含水率、土壤密度及滴头流量不同的条件下,对土壤湿润体的变化过程进行试验,确定湿润峰及积盐范围,在积盐范围内混种盐角草和猪毛菜。测定土壤酸碱度及易溶盐离子总量的减少量,并积盐范围内混种的盐角草和猪毛菜与普通土壤中栽培的盐角草和猪毛菜的盐含量进行对比。结果表明,盐角草吸走部分Na+、Cl-离子,猪毛菜吸走土壤中的CO32-、SO42-离子,积盐范围内土深20cm处总含盐量降低了0.26g/kg。%pH=7.9 to the water as irrigation water,soil moisture,soil bulk density and drops under the condition of different head flow,moist soil body of the change process,determine the wet peak and deposited salt,salt in product range within the scope of mixed salt grass and Salsola collina pall.Angle Measuring soil ph and soluble salt ions decrease of total amount deposited salt,and within the scope of mixed salt grass and Salsola collina pall.and Angle of the cultivation common soil salt Angle grass and Salsola collina pall the salt content of the dishes were compared.The results show that,salt Angle grass attract part,making Na+ and CI-ions,Salsola collina pall salt inhibit drain on the soil of CO2-3 and SO2-4 ions,deposited salt-within 20 cm deep soil in salt content at reduced total 0.26 g/kg.

  20. Erythrocentaurin, Biosynthesis Postulation and Biomimetic Synthesis

    Institute of Scientific and Technical Information of China (English)

    LEI,Jun; YUAN,Xiang-Hui; LIU,Zhu-Lan; LIU,Jian-Li

    2004-01-01

    @@ Erythrocentaurin is a relatively simple nature product isolated from the root of Gentiana macrophylla Pall.[1] The co-existed of gentiopicroside from the same species led to speculation that erythrocentaurin is a biosynthesis product of gentiopicroside. The transformation of secologanin to carbocyclic aglycone under biomimetic condition has already known (Scheme 1).[2,3] The postulated biosynthesis pathway of erythrocentaurin may be in the same way. In the process the cyclic hemiacetal of the aglycone opened to the dialdehyde which then undergoes a vinylogous aldol reaction, and then dehydroxylation and double bond migration to the title compound (Scheme 2).

  1. Déficits sociales en adolescentes con sobrepeso y obesidad

    OpenAIRE

    Lacunza, Ana Betina; Caballero, Silvia Valeria; Salazar Burgos, Ramiro Joaquín; Sal, Javier; Filgueira Blanche, Josefina

    2016-01-01

    El objetivo de este trabajo fue identificar las habilidades sociales de adolescentes con sobrepeso y obesidad de contexto urbano y rural de Tucumán. Se realizaron mediciones antropométricas a una muestra de 276 adolescentes de 11 a 20 años, asistentes a escuelas públicas; se les administró además la Batería de Socialización BAS-3 (Silva Moreno y Martorell Pallás, 1989), y una encuesta nutricional como sociodemográfica. Se encontró un 18% de adolescentes con diagnostico de sobrepeso y obesidad...

  2. A proposal to use satellite-based air pollution mapping for standardising the siting of bioindicators

    Energy Technology Data Exchange (ETDEWEB)

    Sifakis, N.I. [National Observatory of Athens, Pendeli (Greece). Inst. for Space Applications and Remote Sensing

    2002-07-01

    Satellite Earth observation (EO) data, providing synoptic and repetitive views of environmental phenomena, can be used to detect pollution palls, assess the pollution load and map its dispersion around urban areas. The pollution assessment by EO is carried out in terms of 'optical thickness' quantifiable by optical atmospheric effects on the satellite imagery. Visual photointerpretation and digital processing of satellite images of the Greater Athens Area allowed obtaining, for the first time, synoptic views of the pollution dispersion in an around the Athens basin. These 'satellite pollution maps' matched very well with the results from bioindication studies carried out in the same area. (orig.)

  3. 关于龙胆草口服剂量的探讨

    Institute of Scientific and Technical Information of China (English)

    孙皎月

    2001-01-01

    @@龙胆草是较常用的中药,为龙胆科(Gentianaceae)多年生草本植物,龙胆(Gentiana scabra Bunge)或三花龙胆(Gtriflora Pall),以干燥根茎入药(以根为主).药典记载其性味:苦寒,具有清热燥湿、泻肝胆实火、清下焦湿热功能,用量为3~6g[1].

  4. A straightforward methodology for designing continuous monoclonal antibody capture multi-column chromatography processes.

    Science.gov (United States)

    Gjoka, Xhorxhi; Rogler, Karl; Martino, Richard Alexander; Gantier, Rene; Schofield, Mark

    2015-10-16

    A simple process development strategy for continuous capture multi-column chromatography (MCC) is described. The approach involves a few single column breakthrough experiments, based on several simplifying observations that enable users to rapidly convert batch processes into well-designed multi-column processes. The method was validated using a BioSMB(®) (Pall Life Sciences) lab scale multi-column system and a mAb capture process employing Protein A resin. The approach enables users to optimize MCC processes based on their internal preferences and constraints without requiring any mathematical modeling expertise.

  5. A new species of Astragalus (Fabaceae from west coast of Baikal Lake (Irkutsk Oblast

    Directory of Open Access Journals (Sweden)

    N. V. Stepantsova

    2015-05-01

    Full Text Available A new species, Astragalus rytyensis Stepantsova (Fabaceae, growing on the west coast of the lake Baikal, is described. Morphological differences from related taxa – A. versicolor Pall., A. austrosibiricus Schischk., and A. inopinatus Boriss., are discussed and uncertain position of the new species in the system of the genus is emphasized which is intermediate between subg. Phaca (L. Bunge sect. Hemiphaca Bunge and subg. Cercidothrix Bunge sect. Onobrychium Bunge. Ecological and phonological features of A. rytyensis are reported and chromosome numbers of the new (2n = 6x = 48 and related species are counted.

  6. 正交试验法提取白芍中芍药甙的工艺研究

    Institute of Scientific and Technical Information of China (English)

    甘恕潮; 李成网

    2001-01-01

    @@ 白芍为毛茛科植物芍药(paeonia lactiflora pall)的干燥根,具有平肝止痛,养血调经,敛阴止汗之功效.用于头痛眩晕,胁痛,腹痛,四肢挛痛,血虚萎黄,月经不调,自汗,盗汗.为了控制其提取质量,我们以白芍中主要成分芍药甙含量为指标,采用正交试验法对提取工艺进行优选,获得了最佳条件.

  7. 芍药的化学成分研究%STUDY ON THE CHEMICAL CONSTITUTENTS FROM PAEONIA LACTIFLORA

    Institute of Scientific and Technical Information of China (English)

    王文祥; 蒋小岗; 顾明; 顾振纶

    2000-01-01

    毛茛科植物芍药(Paeonia lactiflora pall)的干燥根的醇提液经大孔树脂处理后,在其有效部位分得6个化合物,鉴定为苯甲酸(Benzoic acid Ⅰ)、没食子酸(Gallic acid Ⅱ)、没食子酸乙酯(Ethyl gallateⅢ)、芍药甙(Paeoniflorin Ⅳ)、氧芍药甙(Oxypaeoniflorin Ⅴ)和苯甲酰芍药甙(Benzoyl paeoniflorinⅥ).

  8. HPLC考察DA201大孔树脂对芍药苷的吸附容量%Study on Adsorption Capacity of Paeoniflorin on DA201 Macro Reticular Resin by HPLC Method

    Institute of Scientific and Technical Information of China (English)

    滕坤; 张莲珠; 张海丰

    2006-01-01

    白芍是毛茛科植物芍药(Paeonia lactiflora Pall.)的干燥根,主要活性成分为芍药苷.现代药理研究表明,芍药苷具有抗炎、镇痛、抗惊厥和免疫调节等作用,临床应用广泛,疗效确切.笔者就DA201大孔树脂对芍药苷的吸附容量进行考察,为更好地分离纯化芍药苷提供参考.

  9. 芍药的种植技术

    Institute of Scientific and Technical Information of China (English)

    王秀芳

    2002-01-01

    @@ 白芍为毛莨科植物芍药(Paeonia lactiflora Pall.)的干燥根.白芍味苦、酸,性微寒,归肝、脾经.具有平肝止痛、养血调经、敛阴止汗之功能.用于头脑眩晕、胁痛、腹痛、四肢挛痛、血虚萎黄、月经不调、自汗、盗汗等症.不宜与藜芦同用.

  10. OPERATION CASTLE. Radiological Safety. Volume 1

    Science.gov (United States)

    1985-09-01

    Service Manual 105-33* "Radioactivity Ground Pall-cit Plot", dated 1 Ausist 1951# revised as /JrISM 105-33 "Radio- activity Fall-out and RADEX Plots...established. In addition, a plotting device and manual based essentially on the AWSM 105-33 technique, is in preparation by the Naval Aerologiecl Service...of tho roquircmont to ^orato in radiologiaally eontaaiaatad watara» • a. Studiaa bo initiated ta dotendno oothoda of preventing eenaeatration of

  11. Measurement of body dissatisfaction in college-enrolled Mexican American Women: A Rasch-based examination of the validity and reliability of the EDI-III.

    Science.gov (United States)

    Stein, Karen Farchaus; Riley, Barth Brian; Hoyland-Domenico, Lisa; Lee, Chia-Kuei

    2015-12-01

    Measures of body dissatisfaction have not been validated for Mexican American (MA) women, who evaluate their bodies differently than Caucasian women. In this study, the psychometric properties of the EDI-III, Body Dissatisfaction Subscale (BDS) were examined in a sample of college-enrolled MA women using the Rasch Rating Scale Model. Criterion validity was also addressed. BDS evidenced good item fit, person and item reliability, once poorly correlated items were removed. Two qualitatively distinct dimensions of body dissatisfaction were identified: (1) overall body shape and stomach, and (2) the lower body. Validity of the scales was supported. Results suggest: MA women's satisfaction with overall body shape is not synonymous with attitudes toward their lower body.

  12. Toxicity evaluation of 2-hydroxybiphenyl and other compounds involved in studies of fossil fuels biodesulphurisation.

    Science.gov (United States)

    Alves, L; Paixão, S M

    2011-10-01

    The acute toxicity of some compounds used in fossil fuels biodesulphurisation studies, on the respiration activity, was evaluated by Gordonia alkanivorans and Rhodococcus erythropolis. Moreover, the effect of 2-hydroxybiphenyl on cell growth of both strains was also determined, using batch (chronic bioassays) and continuous cultures. The IC₅₀ values obtained showed the toxicity of all the compounds tested to both strains, specially the high toxicity of 2-HBP. These results were confirmed by the chronic toxicity data. The toxicity data sets highlight for a higher sensitivity to the toxicant by the strain presenting a lower growth rate, due to a lower cells number in contact with the toxicant. Thus, microorganisms exhibiting faster generation times could be more resistant to 2-HBP accumulation during a BDS process. The physiological response of both strains to 2-HBP pulse in a steady-state continuous culture shows their potential to be used in a future fossil fuel BDS process.

  13. Preparation for microgravity science investigation of compound semiconductor crystal growth

    Science.gov (United States)

    Fripp, A. L.; Debnam, W. J.; Clark, I. O.; Crouch, R. K.; Carlson, F. M.

    1985-01-01

    Preparatory work on Bridgman directional solidification (BDS) of PbSnTe crystals prior to microgravity crystal growth experiments on Shuttle flights are reported. Gravitational effects become important in crystal growth when density gradients are present. The situation is critical in BDS of PbSnTe because of the necessity of obtaining homogeneous compositional distributions, which can be disturbed when convective processes occur. Numerical models have been defined which quantify the effects of convection in the crystal growth solution. The models were verified by earth-based crystal-growth tests in a two-zone furnace using equal concentrations of each of the elements. Data are provided to demonstrate the differences in composition among crystals grown at different orientations to the gravitational field vector.

  14. MHV amplitude for 3->3 gluon scattering in Regge limit

    CERN Document Server

    Bartels, J; Prygarin, A

    2010-01-01

    We calculate corrections to the BDS formula for the six-particle planar MHV amplitude for the gluon transition 3->3 in the multi-Regge kinematics for the physical region, in which the Regge pole ansatz is not valid. The remainder function at two loops is obtained by an analytic continuation of the expression derived by Goncharov, Spradlin, Vergu and Volovich to the kinematic region described by the Mandelstam singularity exchange in the crossing channel. It contains both the imaginary and real contributions being in agreement with the BFKL predictions. The real part of the three loop expression is found from a dispersion-like all-loop formula for the remainder function in the multi-Regge kinematics derived by one of the authors. We also make a prediction for the all-loop real part of the remainder function multiplied by the BDS phase, which can be accessible through calculations in the regime of the strong coupling constant.

  15. THE INITIAL MASS FUNCTION MODELED BY A LEFT TRUNCATED BETA DISTRIBUTION

    Energy Technology Data Exchange (ETDEWEB)

    Zaninetti, Lorenzo, E-mail: zaninetti@ph.unito.it [Dipartimento di Fisica, Via Pietro Giuria 1, I-10125 Torino (Italy)

    2013-03-10

    The initial mass function for stars is usually fitted by three straight lines, which means it has seven parameters. The presence of brown dwarfs (BDs) increases the number of straight lines to four and the number of parameters to nine. Another common fitting function is the lognormal distribution, which is characterized by two parameters. This paper is devoted to demonstrating the advantage of introducing a left truncated beta probability density function, which is characterized by four parameters. The constant of normalization, the mean, the mode, and the distribution function are calculated for the left truncated beta distribution. The normal beta distribution that results from convolving independent normally distributed and beta distributed components is also derived. The chi-square test and the Kolmogorov-Smirnov test are performed on a first sample of stars and BDs that belongs to the massive young cluster NGC 6611, and on a second sample that represents the masses of the stars of the cluster NGC 2362.

  16. BDS对GPS定位精度的改进

    Institute of Scientific and Technical Information of China (English)

    杜新远

    2015-01-01

    2012年底,中国的北斗卫星导航系统(BDS)正式服务于亚太地区,这是继GPS和GLONASS之后第三个成熟的卫星导航系统.文中为探索BDS系统对GPS系统定位精度改进展开研究,在对BDS和GPS系统时空基准统一的基础上,构建了BDS/GPS系统联合单点定位的数学模型,以某CORS站的GNSS实测数据为例,分析了BDS对GPS的增强作用,得出有益的结论.

  17. Discrepancy between actual and ideal body images; Impact on eating and exercise behaviors.

    Science.gov (United States)

    Anton, S D; Perri, M G; Riley, J R

    2000-12-01

    This study examined how discrepancies between actual and ideal body images are related to eating and exercise patterns. A total of 115 college-age women completed the Body Discrepancy Scale (BDS, a measure of the discrepancy between one's "actual" vs. "ideal" weight and size), a leisure-time physical activity survey, and questionnaires assessing the intake of fat and fiber (i.e., fruits and vegetables), as well as measures of maladaptive eating attitudes and behaviors. Partial correlations (controlling for Body Mass Index, BMI) showed that scores on the BDS were significantly (P'sbody image dissatisfaction (r=.32) and binge eating (r=.32). Collectively, these findings suggest that discrepancies between actual and ideal body images are associated with maladaptive eating and exercise patterns.

  18. Bioefficacy of budesonide loaded crosslinked polyelectrolyte microparticles in rat model of induced colitis.

    Science.gov (United States)

    Crcarevska, M Simonoska; Dodov, M Glavas; Petrusevska, G; Gjorgoski, I; Goracinova, K

    2009-12-01

    A targeted delivery system for inflammatory bowel diseases, chitosan-Ca-alginate microparticles efficiently loaded with budesonide (BDS), were designed using one-step spray-drying process. They were eudragit-coated and examined for in vivo efficacy. Experimental colitis was induced by rectal instillation of 2,4,6-trinitrobenzene sulphonic acid (TNBS) into male Wistar rats. Drugs were administered by oral gavage daily for 5 days. Colon/body weight ratio, gross morphological and histological evaluation, and clinical activity score were determined as inflammatory indices. Individual clinical and histological evaluation showed that colitis severity was suppressed the most greatly in order BDS properties (one-way ANOVA, P < 0.05). The results established the prediction by previous in vitro studies.

  19. Measurements of the absolute branching fractions for D-s(+) -> eta e(+)nu(e) and D-s(+) -> eta ' e(+)nu(e)

    NARCIS (Netherlands)

    Ablikim, M.; Achasov, M. N.; Ahmed, S.; Ai, X. C.; Albayrak, O.; Albrecht, M.; Ambrose, D. J.; Amoroso, A.; An, F. F.; An, Q.; Bai, J. Z.; Bakina, O.; Ferroli, R. Baldini; Ban, Y.; Bennett, D. W.; Bennett, J. V.; Berger, N.; Bertani, M.; Bettoni, D.; Bian, J. M.; Bianchi, F.; Boger, E.; Boyko, I.; Briere, R. A.; Cai, H.; Cai, X.; Cakir, O.; Calcaterra, A.; Cao, G. F.; Cetin, S. A.; Chai, J.; Chang, J. F.; Chelkov, G.; Chen, G.; Chen, H. S.; Chen, J. C.; Chen, M. L.; Chen, P. L.; Chen, S. J.; Chen, X.; Chen, X. R.; Chen, Y. B.; Cheng, H. P.; Chu, X. K.; Cibinetto, G.; Dai, H. L.; Dai, J. P.; Dbeyssi, A.; Dedovich, D.; Deng, Z. Y.; Denig, A.; Denysenko, I.; Destefanis, M.; De Mori, F.; Ding, Y.; Dong, C.; Dong, J.; Dong, L. Y.; Dong, M. Y.; Dorjkhaidav, O.; Dou, Z. L.; Du, S. X.; Duan, P. F.; Fang, J.; Fang, S. S.; Fang, X.; Fang, Y.; Farinelli, R.; Fava, L.; Fegan, S.; Feldbauer, F.; Felici, G.; Feng, C. Q.; Fioravanti, E.; Fritsch, M.; Fu, C. D.; Gao, Q.; Gao, X. L.; Gao, Y.; Gao, Z.; Garzia, I.; Goetzen, K.; Gong, L.; Gong, W. X.; Gradl, W.; Greco, M.; Gu, M. H.; Gu, Y. T.; Guan, Y. H.; Guo, A. Q.; Guo, L. B.; Guo, R. P.; Guo, Y.; Guo, Y. P.; Haddadi, Z.; Hafner, A.; Han, S.; Hao, X. Q.; Harris, F. A.; He, K. L.; He, X. Q.; Heinsius, F. H.; Held, T.; Heng, Y. K.; Holtmann, T.; Hou, Z. L.; Hu, C.; Hu, H. M.; Hu, J. F.; Hu, T.; Hu, Y.; Huang, G. S.; Huang, J. S.; Huang, X. T.; Huang, X. Z.; Huang, Y.; Huang, Z. L.; Hussain, T.; Andersson, W. Ikegami; Ji, Q.; Ji, Q. P.; Ji, X. B.; Ji, X. L.; Jiang, L. W.; Jiang, X. S.; Jiang, X. Y.; Jiao, J. B.; Jiao, Z.; Jin, D. P.; Jin, S.; Johansson, T.; Julin, A.; Kalantar-Nayestanaki, N.; Kang, X. L.; Kang, X. S.; Kavatsyuk, M.; Ke, B. C.; Kiese, P.; Kliemt, R.; Kloss, B.; Kolcu, O. B.; Kopf, B.; Kornicer, M.; Kupsc, A.; Kuhn, W.; Lange, J. S.; Lara, M.; Larin, P.; Leithoff, H.; Leng, C.; Li, C.; Li, Cheng; Li, D. M.; Li, F.; Li, F. Y.; Li, G.; Li, H. B.; Li, H. J.; Li, J. C.; Li, Jin; Li, K.; Li, K.; Li, Lei; Li, P. L.; Li, Q. Y.; Li, T.; Li, W. D.; Li, W. G.; Li, X. L.; Li, X. N.; Li, X. Q.; Li, Y. B.; Li, Z. B.; Liang, H.; Liang, Y. F.; Liang, Y. T.; Liao, G. R.; Lin, D. X.; Liu, B.; Liu, B. J.; Liu, C. X.; Liu, D.; Liu, F. H.; Liu, Fang; Liu, Feng; Liu, H. B.; Liu, H. H.; Liu, H. H.; Liu, H. M.; Liu, J.; Liu, J. B.; Liu, J. P.; Liu, J. Y.; Liu, K.; Liu, K. Y.; Liu, L. D.; Liu, P. L.; Liu, Q.; Liu, S. B.; Liu, X.; Liu, Y. B.; Liu, Y. Y.; Liu, Z. A.; Liu, Zhiqing; Loehner, H.; Long, Y. F.; Lou, X. C.; Lu, H. J.; Lu, J. G.; Lu, Y.; Lu, Y. P.; Luo, C. L.; Luo, M. X.; Luo, T.; Luo, X. L.; Lyu, X. R.; Ma, F. C.; Ma, H. L.; Ma, L. L.; Ma, M. M.; Ma, Q. M.; Ma, T.; Ma, X. N.; Ma, X. Y.; Ma, Y. M.; Maas, F. E.; Maggiora, M.; Malik, Q. A.; Mao, Y. J.; Mao, Z. P.; Marcello, S.; Messchendorp, J. G.; Mezzadri, G.; Min, J.; Min, T. J.; Mitchell, R. E.; Mo, X. H.; Mo, Y. J.; Morales, C. Morales; Muchnoi, N. Yu.; Muramatsu, H.; Musiol, P.; Nefedov, Y.; Nerling, F.; Nikolaev, I. B.; Ning, Z.; Nisar, S.; Niu, S. L.; Niu, X. Y.; Olsen, S. L.; Ouyang, Q.; Pacetti, S.; Pan, Y.; Patteri, P.; Pelizaeus, M.; Peng, H. P.; Peters, K.; Pettersson, J.; Ping, J. L.; Ping, R. G.; Poling, R.; Prasad, V.; Qi, H. R.; Qi, M.; Qian, S.; Qiao, C. F.; Qin, J. J.; Qin, N.; Qin, X. S.; Qin, Z. H.; Qiu, J. F.; Rashid, K. H.; Redmer, C. F.; Ripka, M.; Rong, G.; Rosner, Ch.; Ruan, X. D.; Sarantsev, A.; Savrie, M.; Schnier, C.; Schoenning, K.; Schumann, S.; Shan, W.; Shao, M.; Shen, C. P.; Shen, P. X.; Shen, X. Y.; Sheng, H. Y.; Shi, M.; Song, W. M.; Song, X. Y.; Sosio, S.; Spataro, S.; Sun, G. X.; Sun, J. F.; Sun, S. S.; Sun, X. H.; Sun, Y. J.; Sun, Y. Z.; Sun, Z. J.; Sun, Z. T.; Tang, C. J.; Tang, X.; Tapan, I.; Thorndike, E. H.; Tiemens, M.; Uman, I.; Varner, G. S.; Wang, B.; Wang, B. L.; Wang, D.; Wang, D. Y.; Wang, Dan; Wang, K.; Wang, L. L.; Wang, L. S.; Wang, M.; Wang, P.; Wang, P. L.; Wang, W.; Wang, W. P.; Wang, X. F.; Wang, Y. D.; Wang, Y. F.; Wang, Y. Q.; Wang, Z.; Wang, Z. G.; Wang, Z. H.; Wang, Z. Y.; Wang, Z. Y.; Weber, T.; Wei, D. H.; Weidenkaff, P.; Wen, S. P.; Wiedner, U.; Wolke, M.; Wu, L. H.; Wu, L. J.; Wu, Z.; Xia, L.; Xia, Y.; Xiao, D.; Xiao, H.; Xiao, Z. J.; Xie, Y. G.; Xiong, X. A.; Xiu, Q. L.; Xu, G. F.; Xu, J. J.; Xu, L.; Xu, Q. J.; Xu, X. P.; Yan, L.; Yan, W. B.; Yan, W. C.; Yan, Y. H.; Yang, H. J.; Yang, H. X.; Yang, L.; Yang, Y. X.; Ye, M.; Ye, M. H.; Yin, J. H.; You, Z. Y.; Yu, B. X.; Yu, C. X.; Yu, J. S.; Yuan, C. Z.; Yuan, W. L.; Yuan, Y.; Yuncu, A.; Zafar, A. A.; Zallo, A.; Zeng, Y.; Zeng, Z.; Zhang, B. X.; Zhang, B. Y.; Zhang, C.; Zhang, C. C.; Zhang, D. H.; Zhang, H. H.; Zhang, H. Y.; Zhang, J.; Zhang, J. J.; Zhang, J. L.; Zhang, J. Q.; Zhang, J. W.; Zhang, J. Y.; Zhang, J. Z.; Zhang, K.; Zhang, L.; Zhang, S. Q.; Zhang, X. Y.; Zhang, Y.; Zhang, Y.; Zhang, Y. H.; Zhang, Y. T.; Zhang, Yu; Zhang, Z. H.; Zhang, Z. P.; Zhang, Z. Y.; Zhao, G.; Zhao, J. W.; Zhao, J. Y.; Zhao, J. Z.; Zhao, Lei; Zhao, Ling; Zhao, M. G.; Zhao, Q.; Zhao, Q. W.; Zhao, S. J.; Zhao, T. C.; Zhao, Y. B.; Zhao, Z. G.; Zhemchugov, A.; Zheng, B.; Zheng, J. P.; Zheng, W. J.; Zheng, Y. H.; Zhong, B.; Zhou, L.; Zhou, X.; Zhou, X. K.; Zhou, X. R.; Zhou, X. Y.; Zhu, K.; Zhu, K. J.; Zhu, S.; Zhu, S. H.; Zhu, X. L.; Zhu, Y. C.; Zhu, Y. S.; Zhu, Z. A.; Zhuang, J.; Zotti, L.; Zou, B. S.; Zou, J. H.

    2016-01-01

    By analyzing 482 pb(-1) of e(+)e(-) collision data collected at root s = 4.009 GeV with the BESIII detector at the BEPCII collider, we measure the absolute branching fractions for the semileptonic decays D-s(+) -> eta e(+)nu(e) and D-s(+) -> eta ' e(+)nu(e) to be B(D-s(+) -> eta e(+)nu(e)) = (2.30 +

  20. Australian Disaster Research Directory (Including Some Contributions from New Zealand). Provisional--1983.

    Science.gov (United States)

    1983-06-01

    Adelaide, GPO Box 438, Adelaide, S,:uth Australia 5001 (08) 2285333 Kenneth A Brown BDS, FICD, Senior Lecturer in Forensic Odontology , Department of...which included projects relevant to disaster victim identification, as follows: To develop for Australia internationally compatible odontological methods...hazard-related course: 2.251G Toxicology , Occupational and Public Health. University of New South Wales PO Box 1 Kensington NSW 2033 (02) 6630351 Dr

  1. Accuracy Analysis of a Box-wing Theoretical SRP Model

    Science.gov (United States)

    Wang, Xiaoya; Hu, Xiaogong; Zhao, Qunhe; Guo, Rui

    2016-07-01

    For Beidou satellite navigation system (BDS) a high accuracy SRP model is necessary for high precise applications especially with Global BDS establishment in future. The BDS accuracy for broadcast ephemeris need be improved. So, a box-wing theoretical SRP model with fine structure and adding conical shadow factor of earth and moon were established. We verified this SRP model by the GPS Block IIF satellites. The calculation was done with the data of PRN 1, 24, 25, 27 satellites. The results show that the physical SRP model for POD and forecast for GPS IIF satellite has higher accuracy with respect to Bern empirical model. The 3D-RMS of orbit is about 20 centimeters. The POD accuracy for both models is similar but the prediction accuracy with the physical SRP model is more than doubled. We tested 1-day 3-day and 7-day orbit prediction. The longer is the prediction arc length, the more significant is the improvement. The orbit prediction accuracy with the physical SRP model for 1-day, 3-day and 7-day arc length are 0.4m, 2.0m, 10.0m respectively. But they are 0.9m, 5.5m and 30m with Bern empirical model respectively. We apply this means to the BDS and give out a SRP model for Beidou satellites. Then we test and verify the model with Beidou data of one month only for test. Initial results show the model is good but needs more data for verification and improvement. The orbit residual RMS is similar to that with our empirical force model which only estimate the force for along track, across track direction and y-bias. But the orbit overlap and SLR observation evaluation show some improvement. The remaining empirical force is reduced significantly for present Beidou constellation.

  2. Improvement of orbit determination accuracy for Beidou Navigation Satellite System with Two-way Satellite Time Frequency Transfer

    Science.gov (United States)

    Tang, Chengpan; Hu, Xiaogong; Zhou, Shanshi; Guo, Rui; He, Feng; Liu, Li; Zhu, Lingfeng; Li, Xiaojie; Wu, Shan; Zhao, Gang; Yu, Yang; Cao, Yueling

    2016-10-01

    The Beidou Navigation Satellite System (BDS) manages to estimate simultaneously the orbits and clock offsets of navigation satellites, using code and carrier phase measurements of a regional network within China. The satellite clock offsets are also directly measured with Two-way Satellite Time Frequency Transfer (TWSTFT). Satellite laser ranging (SLR) residuals and comparisons with the precise ephemeris indicate that the radial error of GEO satellites is much larger than that of IGSO and MEO satellites and that the BDS orbit accuracy is worse than GPS. In order to improve the orbit determination accuracy for BDS, a new orbit determination strategy is proposed, in which the satellite clock measurements from TWSTFT are fixed as known values, and only the orbits of the satellites are solved. However, a constant systematic error at the nanosecond level can be found in the clock measurements, which is obtained and then corrected by differencing the clock measurements and the clock estimates from orbit determination. The effectiveness of the new strategy is verified by a GPS regional network orbit determination experiment. With the IGS final clock products fixed, the orbit determination and prediction accuracy for GPS satellites improve by more than 50% and the 12-h prediction User Range Error (URE) is better than 0.12 m. By processing a 25-day of measurement from the BDS regional network, an optimal strategy for the satellite-clock-fixed orbit determination is identified. User Equivalent Ranging Error is reduced by 27.6% for GEO satellites, but no apparent reduction is found for IGSO/MEO satellites. The SLR residuals exhibit reductions by 59% and 32% for IGSO satellites but no reductions for GEO and MEO satellites.

  3. Discontinuities of multi-Regge amplitudes

    CERN Document Server

    Fadin, V S

    2014-01-01

    In the BFKL approach, discontinuities of multiple production amplitudes in invariant masses of produced particles are discussed. It turns out that they are in evident contradiction with the BDS ansatz for $n$-gluon amplitudes in the planar $N$=4 SYM at $n\\ge 6$. An explicit expression for the NLO discontinuity of the two-to-four amplitude in the invariant mass of two produced gluons is is presented.

  4. Positron annihilation and relaxation dynamics from dielectric spectroscopy and nuclear magnetic resonance: Cis-trans-1,4-poly(butadiene)

    Science.gov (United States)

    Bartoš, J.; Šauša, O.; Schwartz, G. A.; Alegría, A.; Alberdi, J. M.; Arbe, A.; Krištiak, J.; Colmenero, J.

    2011-04-01

    We report a joint analysis of positron annihilation lifetime spectroscopy (PALS), dielectric spectroscopy (BDS), and nuclear magnetic resonance (NMR) on cis-trans-1,4-poly(butadiene) (c-t-1,4-PBD). Phenomenological analysis of the orthopositronium lifetime τ3 - T dependence by linear fitting reveals four characteristic PALS temperatures: T_{b1} ^G = 0{.63}T_g^{PALS}, T_g^{PALS}, T_{b1} ^L = 1.22T_g^{PALS}, and T_{b2} ^L = 1.52T_g^{PALS}. Slight bend effects in the glassy and supercooled liquid states are related to the fast or slow secondary β process, from neutron scattering, respectively, the latter being connected with the trans-isomers. In addition, the first bend effect in the supercooled liquid coincides with a deviation of the slow effective secondary βeff relaxation related to the cis-isomers from low-T Arrhenius behavior to non-Arrhenius one and correlates with the onset of the primary α process from BDS. The second plateau effect in the liquid state occurs when τ3 becomes commensurable with the structural relaxation time τα(Tb2). It is also approximately related to its crossover from non-Arrhenius to Arrhenius regime in the combined BDS and NMR data. Finally, the combined BDS and NMR structural relaxation data, when analyzed in terms of the two-order parameter (TOP) model, suggest the influence of solidlike domains on both the annihilation behavior and the local and segmental chain mobility in the supercooled liquid. All these findings indicate the influence of the dynamic heterogeneity in both the primary and secondary relaxations due to the cis-trans isomerism in c-t-1,4-PBD and their impact into the PALS response.

  5. Riconoscimento del profilo professionale del bibliotecario documentalista in sanità

    OpenAIRE

    Truccolo, Ivana; Vidale, Claudia; Falcetta, Anna Maria; Merighi, Roberta

    2006-01-01

    In Italy the reference institution for all librarians is AIB (Associazione Italiana Biblioteche), while AIDA, the Association for the Advanced Documentation, contributes to develop documentation diffusion and information science. The Ministry of Health also plays an important role in supporting the libraries of Biomedical Research Institutes (IRCCS). The BDS Association (Bibliotecari Documentalisti della Sanità) was founded in 2000 with the purpose of highlight the specific activities perf...

  6. 1,25-Dihydroxyvitamin-D3 Induces Avian β-Defensin Gene Expression in Chickens.

    Directory of Open Access Journals (Sweden)

    Long Zhang

    Full Text Available Host defense peptides (HDPs play a critical role in innate immunity. Specific modulation of endogenous HDP synthesis by dietary compounds has been regarded as a novel approach to boost immunity and disease resistance in animal production. 1,25-dihydroxy vitamin D3 (1,25D3 is well known as a powerful HDP inducer in humans, but limited information about the effect of 1,25D3 on HDPs in poultry is available. Here, we sought to examine whether 1,25D3 could stimulate avian β-defensin (AvBD expression in chickens. We used chicken embryo intestinal epithelial cells (CEIEPCs and peripheral blood mononuclear cells (PBMCs to study the effect of 1,25D3 on the expression of AvBDs. We observed that 1,25D3 is able to up-regulate the expression of several AvBDs in CEIEPCs and PBMCs, whereas it increased the amounts of AvBD4 mRNA in CEIEPCs only in the presence of lipopolysaccharide (LPS. On the other hand, LPS treatment not only inhibited the expression of CYP24A1 but also altered the expression pattern of VDR in CEIEPCs. Furthermore, AvBDs were not directly regulated by 1,25D3, as cycloheximide completely blocked 1,25D3-induced expression of AvBDs. Our observations suggest that 1,25D3 is capable of inducing AvBD gene expression and is a potential antibiotic alternative through augmentation of host innate immunity as well as disease control in chickens.

  7. Identification of innate immune antiretroviral factors during in vivo and in vitro exposure to HIV-1.

    Science.gov (United States)

    Zapata, Wildeman; Aguilar-Jiménez, Wbeimar; Feng, Zhimin; Weinberg, Aaron; Russo, Aniello; Potenza, Nicoletta; Estrada, Hernando; Rugeles, María T

    2016-03-01

    Defensins, RNases and cytokines are present at mucosal barriers, main ports of HIV entry, and are potential mediators of the resistant phenotype exhibited by HIV-1-exposed seronegative individuals (HESN) during sexual exposure. We aimed to determine the role of soluble factors in natural resistance to HIV-1 infection. Vaginal/endocervical/oral mucosal samples were taken from 60 HESN, 60 seropositive (SP) and 61 healthy controls (HC). Human neutrophil peptide 1 (hNP-1), human beta defensin (hBD) 2 and 3, RNases, MIP-1β and RANTES mRNA transcripts were quantified by qPCR and in vitro single-round, recombinant-based viral infectivity assay was used to evaluate the anti-HIV-1 activity of hBDs and RNases. HESN expressed significantly higher levels of hNP-1, hBDs mRNA in oral mucosa compared to HC (P < 0.05). In genital mucosa, significantly higher mRNA levels of MIP-1β, RANTES and RNases were found in HESN compared to HC (P < 0.05). HBDs and RNases inhibit HIV-1 replication, particularly R5 at entry, reverse transcription and nuclear import of the viral life cycle. hNP-1, hBDs, MIP-1β, RANTES and RNases, collectively could contribute to HIV-1 resistance during sexual exposure. Moreover, the inhibition of HIV-1 infection in vitro by hBDs and RNases suggests that they may be exploited as potential antiretrovirals.

  8. Building a Capabilities Network to Improve Disaster Preparation Effort in the Pacific Command Area of Responsibility

    Science.gov (United States)

    2013-06-01

    and Community Participation.” • Microfinance – CSR’s microfinance program focus on providing training people on how to save money and provide...disasters. ú Concern Worldwide U.S. also provides training in the areas of “ microfinance products; infrastructural development, necessary to small...business generation; and business development services (BDS) in which microfinance activities are promoted to stimulate work for the poorest-who we

  9. Overcoming the Challenges of BeiDou Receiver Implementation

    Directory of Open Access Journals (Sweden)

    Mohammad Zahidul H. Bhuiyan

    2014-11-01

    Full Text Available Global Navigation Satellite System (GNSS-based positioning is experiencing rapid changes. The existing GPS and the GLONASS systems are being modernized to better serve the current challenging applications under harsh signal conditions. These modernizations include increasing the number of transmission frequencies and changes to the signal components. In addition, the Chinese BeiDou Navigation Satellite system (BDS and the European Galileo are currently under development for global operation. Therefore, in view of these new upcoming systems the research and development of GNSS receivers has been experiencing a new upsurge. In this article, the authors discuss the main functionalities of a GNSS receiver in view of BDS. While describing the main functionalities of a software-defined BeiDou receiver, the authors also highlight the similarities and differences between the signal characteristics of the BeiDou B1 open service signal and the legacy GPS L1 C/A signal, as in general they both exhibit similar characteristics. In addition, the authors implement a novel acquisition technique for long coherent integration in the presence of NH code modulation in BeiDou D1 signal. Furthermore, a simple phase-preserved coherent integration based acquisition scheme is implemented for BeiDou GEO satellite acquisition. Apart from the above BeiDou-specific implementations, a novel Carrier-to-Noise-density ratio estimation technique is also implemented in the software receiver, which does not necessarily require bit synchronization prior to estimation. Finally, the authors present a BeiDou-only position fix with the implemented software-defined BeiDou receiver considering all three satellite constellations from BDS. In addition, a true multi-GNSS position fix with GPS and BDS systems is also presented while comparing their performances for a static stand-alone code phase-based positioning.

  10. Overcoming the challenges of BeiDou receiver implementation.

    Science.gov (United States)

    Bhuiyan, Mohammad Zahidul H; Söderholm, Stefan; Thombre, Sarang; Ruotsalainen, Laura; Kuusniemi, Heidi

    2014-11-21

    Global Navigation Satellite System (GNSS)-based positioning is experiencing rapid changes. The existing GPS and the GLONASS systems are being modernized to better serve the current challenging applications under harsh signal conditions. These modernizations include increasing the number of transmission frequencies and changes to the signal components. In addition, the Chinese BeiDou Navigation Satellite system (BDS) and the European Galileo are currently under development for global operation. Therefore, in view of these new upcoming systems the research and development of GNSS receivers has been experiencing a new upsurge. In this article, the authors discuss the main functionalities of a GNSS receiver in view of BDS. While describing the main functionalities of a software-defined BeiDou receiver, the authors also highlight the similarities and differences between the signal characteristics of the BeiDou B1 open service signal and the legacy GPS L1 C/A signal, as in general they both exhibit similar characteristics. In addition, the authors implement a novel acquisition technique for long coherent integration in the presence of NH code modulation in BeiDou D1 signal. Furthermore, a simple phase-preserved coherent integration based acquisition scheme is implemented for BeiDou GEO satellite acquisition. Apart from the above BeiDou-specific implementations, a novel Carrier-to-Noise-density ratio estimation technique is also implemented in the software receiver, which does not necessarily require bit synchronization prior to estimation. Finally, the authors present a BeiDou-only position fix with the implemented software-defined BeiDou receiver considering all three satellite constellations from BDS. In addition, a true multi-GNSS position fix with GPS and BDS systems is also presented while comparing their performances for a static stand-alone code phase-based positioning.

  11. Nonthyroidal illness syndrome in patients with subarachnoid hemorrhage due to intracranial aneurysm Sindrome da doença não tiroideana em pacientes com hemorragia subaracnoidea devida a aneurisma cerebral

    Directory of Open Access Journals (Sweden)

    Luiz Augusto Casulari

    2004-03-01

    Full Text Available We have previously reported that subarachnoid hemorrhage due to ruptured intracranial aneurysm (SH is associated with changes in the hormonal profile in the first 24 hours after the event. We proposed that the hormonal changes observed are due to the intense stress to which the patients are exposed. However, the thyroidal hormonal profile is indicative of the presence of a nonthyroidal illness syndrome (NTIS. In this paper, we examined whether the change in the thyroid hormone profile is compatible with a NTIS. Two groups of patients were included in the study: A 30 patients with SH (21 females and 9 males; 41.7±11.4 years and B a control group including 25 patients with benign diseases of the spine (BDS (lumbar disc hernia or stable spinal trauma (8 females and 17 males; 41.3±14.2 years. In a subgroup of eight patients of each group serum triiodothyronine (T3 and reverse T3 levels were measured. The blood samples were obtained between 8:00 and 9:00 AM. The following results were obtained: The SH group had smaller serum T3 and free T4 levels than the BDS group (pNós apresentamos previamente que a hemorragia subaracnoidea devido à ruptura de aneurisma intracraniano (SH está associada com alterações no perfil hormonal nas primeiras 24 horas após o evento. Nós propusemos que as alterações hormonais observadas são devidas ao intenso estresse ao qual os pacientes estão expostos. Contudo, o perfil hormonal tireoidiano é indicativo da presença da síndrome da doença não tireoidiana (NTIS. Neste trabalho, examinamos se as alterações no perfil dos hormônios tireoidianos são compatíveis com a NTIS. Dois grupos de pacientes foram incluídos no estudo: A 30 pacientes com SH (21 mulheres e 9 homens; 41,7±11,4 anos e B um grupo controle incluindo 25 pacientes com doenças benignas da coluna (BDS (hérnia de disco lombar ou estável trauma da coluna (8 mulheres e 17 homens; 41,3±14,2 anos. Em um subgrupo de oito pacientes de cada grupo

  12. Self assembled hyaluronic acid nanoparticles as a potential carrier for targeting the inflamed intestinal mucosa.

    Science.gov (United States)

    Vafaei, Seyed Yaser; Esmaeili, Motahareh; Amini, Mohsen; Atyabi, Fatemeh; Ostad, Seyed Naser; Dinarvand, Rassoul

    2016-06-25

    To develop a nanoparticulate drug carrier for targeting of the inflamed intestinal mucosa, amphiphilic hyaluronic acid (HA) conjugates were synthesized, which could form self-assembled nanoparticles (NPs) in aqueous solution and budesonide (BDS) was loaded into the HANPs. Their particle sizes were in the range of 177 to 293nm with negative surface charge. The model of inflammatory CACO-2 cells was utilized to investigate the therapeutic potential of budesonide loaded HA nanocarriers. The highest expression of CD44 receptors was found on inflamed Caco-2 cells, as determined by flow cytometry. FITC-labeled HANPs revealed greater uptake in inflamed CACO-2 cells compared to untreated CACO-2 and CD44-negative cell lines, NIH3T3. BDS loaded HANPs displayed almost no toxicity indicating HANPs are excellent biocompatible nano-carriers. BDS loaded HANPs demonstrated higher anti-inflammatory effect on IL-8 and TNF-α secretion in inflamed cell model compared to the same dose of free drug. These results revealed the promising potential of HA nanoparticles as a targeted drug delivery system for IBD treatment.

  13. Combustion products of 1,3-butadiene inhibit catalase activity and induce expression of oxidative DNA damage repair enzymes in human bronchial epithelial cells.

    Science.gov (United States)

    Kennedy, Christopher H; Catallo, W James; Wilson, Vincent L; Mitchell, James B

    2009-10-01

    1,3-Butadiene, an important petrochemical, is commonly burned off when excess amounts need to be destroyed. This combustion process produces butadiene soot (BDS), which is composed of a complex mixture of polycyclic aromatic hydrocarbons in particulates ranging in size from DNA damage in NHBE cells. Thus, our aims were to determine the effect of butadiene soot ethanol extract (BSEE) on both enzyme activity and the expression of proteins involved in the repair of oxidative DNA damage. Catalase was found to be sensitive to BDS as catalase activity was potently diminished in the presence of BSEE. Using Western analysis, both the alpha isoform of human 8-oxoguanine DNA glycosylase (alpha-hOGG1) and human apurinic/apyrimidinic endonuclease (APE-1) were shown to be significantly overexpressed as compared to untreated controls after exposure of NHBE cells to BSEE. Our results indicate that BSEE is capable of effectively inactivating the antioxidant enzyme catalase, presumably via oxidation of protein amino acids. The presence of oxidized biomolecules may partially explain the extranuclear fluorescence that is detected when NHBE cells are treated with an organic extract of BDS. Overexpression of both alpha-hOGG1 and APE-1 proteins following treatment of NHBE cells with BSEE suggests that this mixture causes oxidative DNA damage.

  14. The initial mass function of simple and composite stellar populations

    CERN Document Server

    Kroupa, P

    2007-01-01

    (abridged) The case can be made for a rather universal stellar IMF form that can be approximated by a two-part power-law function in the stellar regime. However, there exists a possible hint for a systematic variation with metallicity. A picture is emerging according to which the binary properties of very-low-mass stars (VLMSs) and BDs may be fundamentally different from those of late-type stars implying the probable existence of a discontinuity in the IMF, but the surveys also appear to suggest the number of BDs per star to be independent of the physical conditions of current Galactic star formation. Star-burst clusters and thus globular cluster may, however, have a much larger abundance of BDs. Very recent advances have allowed the measurement of the physical upper stellar mass limit, which also appears to be disconcertingly robust to variations in metallicity. Furthermore, it now appears that star clusters may be formed such that the most-massive stars just forming terminate further star-formation within t...

  15. Investigating the rotational evolution of very low-mass stars and brown dwarfs in young clusters using Monte Carlo simulations

    CERN Document Server

    Vasconcelos, M J

    2016-01-01

    Context. Very low-mass (VLM) stars and brown dwarfs (BDs) present a different rotational behaviour from their solar mass counter-parts. Aims. We investigate the rotational evolution of young VLM stars and BDs using Monte Carlo simulations under the hypothesis of disk locking and stellar angular momentum conservation. Methods. We built a set of objects with masses ranging from 0.01 Mo to 0.4 Mo and considered models with single- and double- peaked initial period distributions with and without disk locking. An object is considered to be diskless when its mass accretion rate is below a given threshold. Results. Models with initial single-peaked period distributions reproduce the observations well given that BDs rotate faster than VLM stars. We observe a correlation between rotational period and mass when we relax the disk locking hypothesis, but with a shallower slope compared to some observational results. The angular momentum evolution of diskless stars is flatter than it is for stars with a disk which occurs ...

  16. Dealing with phraseology in business dictionaries: focus on dictionary functions – not phrases

    Directory of Open Access Journals (Sweden)

    Leroyer, Patrick

    2006-01-01

    Full Text Available The language of written business communication is characterised by the extensive use of phraseology, not only in terms of collocations and idiomatic expressions, but also of standard phrases in prototypical business genres. In any case, the phraseological information should be included in business dictionaries (in the following referred to as BDs in accordance with the planned dictionary functions. Hence, the selection and presentation of the phraseological information should be decided by the lexicographer on the basis of the user needs alone and not on the recommendations of the phraseological literature about lexicographical practice. In this paper, I will firstly explain why lexicography and phraseology, although closely associated in a large number of studies, are quite different disciplines, and how their shared interest for dictionary practice in general is based on radically different views. I will then discuss the dictionary functions of BDs and focus on a number of concepts featuring extensive phraseological solutions to show and argue that dealing with phraseology in BDs should always keep focus on dictionary functions.

  17. Is a biomarker-based diagnostic strategy for invasive aspergillosis cost effective in high-risk haematology patients?

    Science.gov (United States)

    Macesic, N; Morrissey, C O; Liew, D; Bohensky, M A; Chen, S C-A; Gilroy, N M; Milliken, S T; Szer, J; Slavin, M A

    2017-01-27

    Empirical antifungal therapy is frequently used in hematology patients at high risk of invasive aspergillosis (IA), with substantial cost and toxicity. Biomarkers for IA aim for earlier and more accurate diagnosis and targeted treatment. However, data on the cost-effectiveness of a biomarker-based diagnostic strategy (BDS) are limited. We evaluated the cost effectiveness of BDS using results from a randomized controlled trial (RCT) and individual patient costing data. Data inputs derived from a published RCT were used to construct a decision-analytic model to compare BDS (Aspergillus galactomannan and PCR on blood) with standard diagnostic strategy (SDS) of culture and histology in terms of total costs, length of stay, IA incidence, mortality, and years of life saved. Costs were estimated for each patient using hospital costing data to day 180 and follow-up for survival was modeled to five years using a Gompertz survival model. Treatment costs were determined for 137 adults undergoing allogeneic hematopoietic stem cell transplant or receiving chemotherapy for acute leukemia in four Australian centers (2005-2009). Median total costs at 180 days were similar between groups (US[Formula: see text] for SDS [IQR US[Formula: see text

  18. BeiDou Satellites Assistant Determination by Receiving Other GNSS Downlink Signals

    Directory of Open Access Journals (Sweden)

    Lei Chen

    2016-01-01

    Full Text Available GNSS’s orbit determinations always rely on ground station or intersatellite links (ISL. In the emergency of satellite-to-ground links and ISL break-off, BeiDou navigation satellite system (BDS satellites cannot determine their orbits. In this paper, we propose to add a spaceborne annular beam antenna for receiving the global positioning system (GPS and global navigation satellite system (GLONASS signals; therefore, the BDS satellites may be capable of determining their orbits by GPS/GLONASS signals. Firstly, the spectrum selection, the power isolation, the range of Doppler frequency shift, and changing rate are taken into account for the feasibility. Specifically, the L2 band signals are chosen for receiving and processing in order to prevent the overlapping of the receiving and transmitting signals. Secondly, the minimum number of visible satellites (MNVS, carrier-to-noise ratio (C/N0, dilution of precision (GDOP, and geometric distance root-mean-square (gdrms are evaluated for acquiring the effective receiving antennas’ coverage ranges. Finally, the scheme of deploying 3 receiving antennas is proved to be optimal by analysis and simulations over the middle earth orbit (MEO, geostationary earth orbit (GEO, and the inclined geosynchronous satellite orbit (IGSO. The antennas’ structures and patterns are designed to draw a conclusion that installing GPS and GLONASS receivers on BDS satellites for emergent orbits determination is cost-effective.

  19. Study of the dielectric properties of weathered granite, basalt and quartzite by means of broadband dielectric spectroscopy over a wide range of frequency and temperature.

    Science.gov (United States)

    Araujo, Steven; Delbreilh, Laurent; Antoine, Raphael; Dargent, Eric; Fauchard, Cyrille

    2016-04-01

    Broadband Dielectric Spectroscopy (BDS) allows the measurement of the complex impedance of various materials over a wide range of frequency (0.1 Hz to 2 MHz) and temperature (-150 to 400°C). Other properties can be assessed from this measurement such as permittivity and conductivity. In this study, the BDS is presented to figure out the complex behaviour of several rock parameters as a function of the temperature and frequency. Indeed, multiple processes might occur such as interfacial polarization, AC and DC conductivity. The measurements of a weathered granite, basalt and quartzite were performed. The activation energy associated to each process involved during the measurement can be calculated by following the relaxation time as a function of the temperature, taking into account the Havriliak-Négami model. The principle of the technique and the whole study is presented here and several hypothesis are advanced to explain the dielectric behaviour of rocks. Finally, as the range of frequency and temperature of the BDS method is common to several electromagnetic and electrical techniques applied in subsurface geophysics, some perspectives are proposed to better understand geophysical measurements in hydrothermal systems.

  20. Estimating Zenith Tropospheric Delays from BeiDou Navigation Satellite System Observations

    Directory of Open Access Journals (Sweden)

    Xin Sui

    2013-04-01

    Full Text Available The GNSS derived Zenith Tropospheric Delay (ZTD plays today a very critical role in meteorological study and weather forecasts, as ZTDs of thousands of GNSS stations are operationally assimilated into numerical weather prediction models. Recently, the Chinese BeiDou Navigation Satellite System (BDS was officially announced to provide operational services around China and its neighborhood and it was demonstrated to be very promising for precise navigation and positioning. In this contribution, we concentrate on estimating ZTD using BDS observations to assess its capacity for troposphere remote sensing. A local network which is about 250 km from Beijing and comprised of six stations equipped with GPS- and BDS-capable receivers is utilized. Data from 5 to 8 November 2012 collected on the network is processed in network mode using precise orbits and in Precise Point Positioning mode using precise orbits and clocks. The precise orbits and clocks are generated from a tracking network with most of the stations in China and several stations around the world. The derived ZTDs are compared with that estimated from GPS data using the final products of the International GNSS Service (IGS. The comparison shows that the bias and the standard deviation of the ZTD differences are about 2 mm and 5 mm, respectively, which are very close to the differences of GPS ZTD estimated using different software packages.

  1. A homogeneous analysis of disks around brown dwarfs

    CERN Document Server

    Liu, Y; Bayo, A; Nielbock, M; Wang, H

    2015-01-01

    We re-analyzed the Herschel/PACS data of a sample of 55 brown dwarfs (BDs) and very low mass stars with spectral types ranging from M5.5 to L0. We investigated the dependence of disk structure on the mass of the central object in the substellar regime based on a homogeneous analysis of Herschel data from flux density measurements to spectral energy distribution (SED) modeling. A systematic comparison between the derived disk properties and those of sun-like stars shows that the disk flaring of BDs and very low mass stars is generally smaller than that of their higher mass counterparts, the disk mass is orders of magnitude lower than the typical value found in T Tauri stars, and the disk scale heights are comparable in both sun-like stars and BDs. We further divided our sample into an early-type brown dwarf (ETBD) group and a late-type brown dwarf (LTBD) group by using spectral type (=M8) as the border criterion. We systematically compared the modeling results from Bayesian analysis between these two groups, a...

  2. Protoplanetary Disk Masses from Stars to Brown Dwarfs

    CERN Document Server

    Mohanty, Subhanjoy; Mortlock, Daniel; Pascucci, Ilaria; Scholz, Aleks; Thompson, Mark; Apai, Daniel; Lodato, Giuseppe; Looper, Dagny

    2013-01-01

    We present SCUBA-2 850um observations for 7 very low mass stars (VLMS) and brown dwarfs (BDs): 3 in Taurus, 4 in the TWA, and all classical T Tauri (cTT) analogs. We detect 2 of the 3 Taurus disks, but none of the TWA ones. Our 3sigma limits correspond to a dust mass of 1.2 MEarth in Taurus and a mere 0.2 MEarth in the TWA (3--10x deeper than previous work). We combine our data with other sub-mm/mm surveys of Taurus, rho Oph and the TWA to investigate trends in disk mass and grain growth during the cTT phase. We find : (1) The minimum disk outer radius required to explain the upper envelope of sub-mm/mm fluxes is 100 AU for intermediate-mass stars, solar-types and VLMS, and 20 AU for BDs. (2) While the upper envelope of disk masses increases with Mstar from BDs to VLMS to solar-types, no increase is seen from solar-type to intermediate-mass stars. We propose this is due to enhanced photoevaporation around intermediate masses. (3) Many disks around Taurus and rho Oph intermediate-mass and solar-type stars evin...

  3. Chemical abundances of stars with brown-dwarf companions

    CERN Document Server

    Sánchez, D Mata; Israelian, G; Santos, N C; Sahlmann, J; Udry, S

    2014-01-01

    It is well-known that stars with giant planets are on average more metal-rich than stars without giant planets, whereas stars with detected low-mass planets do not need to be metal-rich. With the aim of studying the weak boundary that separates giant planets and brown dwarfs (BDs) and their formation mechanism, we analyze the spectra of a sample of stars with already confirmed BD companions both by radial velocity and astrometry. We employ standard and automatic tools to perform an EW-based analysis and to derive chemical abundances from CORALIE spectra of stars with BD companions. We compare these abundances with those of stars without detected planets and with low-mass and giant-mass planets. We find that stars with BDs do not have metallicities and chemical abundances similar to those of giant-planet hosts but they resemble the composition of stars with low-mass planets. The distribution of mean abundances of $\\alpha$-elements and iron peak elements of stars with BDs exhibit a peak at about solar abundance...

  4. Orbital effects of spatial variations of fundamental coupling constants

    CERN Document Server

    Iorio, Lorenzo

    2011-01-01

    We deal with the effects induced on the orbit of a test particle revolving around a central body by putative spatial variations of fundamental coupling constants $\\zeta$. In particular, we assume a dipole gradient for $\\zeta(\\bds r)/\\bar{\\zeta}$ along a generic direction $\\bds{\\hat{k}}$ in space. We analytically work out the long-term variations of all the six standard Keplerian orbital elements parameterizing the orbit of a test particle in a gravitationally bound two-body system. It turns out that, apart from the semi-major axis $a$, the eccentricity $e$, the inclination $I$, the longitude of the ascending node $\\Omega$, the longitude of pericenter $\\pi$ and the mean anomaly $\\mathcal{M}$ undergo non-zero long-term changes. By using the usual decomposition along the radial ($R$), transverse ($T$) and normal ($N$) directions, we also analytically work out the long-term changes $\\Delta R,\\Delta T,\\Delta N$ and $\\Delta v_R,\\Delta v_T,\\Delta v_N$ experienced by the position and the velocity vectors $\\bds r$ and...

  5. Time evolution of ground motion-dependent depolarisation at linear colliders

    CERN Document Server

    Bailey, I; Beckmann, M; Hartin, A; Helebrant, C; Kaefer, D; List, J; Moortgat-Pick, G

    2011-01-01

    Future linear colliders plan to collide polarised beams and the planned physics reach requires knowledge of the state of polarisation as precisely as possible. The polarised beams can undergo depolarisation due to various mechanisms. In order to quantify the uncertainty due to depolarisation, spin tracking simulations in the International Linear Collider (ILC) Beam Delivery System (BDS) and at the Interaction Point (IP) have been performed. Spin tracking in the BDS was achieved using the BMAD subroutine library, and the CAIN program was used to do spin tracking through the beam-beam collision. Assuming initially aligned beamline elements in the BDS, a ground motion model was applied to obtain realistic random misalignments over various time scales. Depolarisation at the level of 0.1% occurs within a day of ground motion at a noisy site. Depolarisation at the IP also exceeds 0.1% for the nominal parameter sets for both the ILC and for the Compact Linear Collider (CLIC). Theoretical work is underway to include ...

  6. Long-term evolution of the inclined geosynchronous orbit in Beidou Navigation Satellite System

    Science.gov (United States)

    Tang, Jingshi; Hou, Xiyun; Liu, Lin

    2016-07-01

    China's Beidou Navigation Satellite System (BDS), unlike other navigation satellite systems, uses several inclined geosynchronous orbits (IGSO) to enhance the accuracy of regional or global navigation. In order to maintain a safe space environment in the vicinity of its operational orbit, it is necessary that the decommissioned satellites be well disposed of. Following up the study on the specific BDS IGSO satellites in the previous COSPAR Scientific Assembly, we now extend the study to understand the underlying dynamics and discuss the long-term evolution of such orbits from a more general perspective. In this paper, we first theoretically analyze the problem using simplified models of 1 and 2 degrees of freedoms (1-/2-dof). Then we extensively investigate the numerically propagated orbits for 200 and 1000 years, applying the results from these simplified models and seeking proper explanations for the underlying dynamics. We especially focus on the eccentricity evolution, which is a major concern regarding the collision hazard. We expect to understand the underlying dynamics governing the long-term evolution of BDS IGSO and gain helpful insight into future disposal strategies.

  7. Finding benchmark brown dwarfs to probe the IMF as a function of time

    CERN Document Server

    Pinfield, D J; Day-Jones, A C; Folkes, S L; Jones, H R A; Kendall, T R; Lucas, P W; Steele, I A

    2006-01-01

    Using a simulated disk brown dwarf (BD) population, we find that new large area infrared surveys are expected to identify enough BDs covering wide enough mass--age ranges to potentially measure the mass function down to ~0.03Mo, and the BD formation history out to 10 Gyr, at a level capable of establishing if BD formation follows star formation. We suggest these capabilities are best realised by spectroscopic calibration of BD properties (Teff, g and [M/H]) which, when combined with a measured luminosity and an evolutionary model can give BD mass and age relatively independent of BD atmosphere models. Such calibration requires an empirical understanding of how BD spectra are affected by variations in these properties, and thus the identification and study of "benchmark BDs" whose age and composition can be established independently. We identify the best sources of benchmark BDs as young open cluster members, moving group members, and wide (>1000AU) BD companions to both subgiant stars and high mass white dwar...

  8. Rotational studies in the Orion Nebula Cluster: from solar mass stars to brown dwarfs

    CERN Document Server

    Rodriguez-Ledesma, Maria Victoria; Eislöffel, Jochen

    2009-01-01

    Rotational studies at a variety of ages and masses are important for constraining the angular momentum evolution of young stellar objects (YSO). Of particular interest are the very low mass (VLM) stars and brown dwarfs (BDs), because of the significant lack of known rotational periods in that mass range. We provide for the first time information on rotational periods for a large sample of young VLM stars and BDs. This extensive rotational period study in the 1 Myr old Orion Nebula Cluster (ONC) is based on a deep photometric monitoring campaign using the Wide Field Imager (WFI) camera on the ESO/MPG 2.2m telescope on La Silla, Chile. Accurate I-band photometry of 2908 stars was obtained, extending three magnitudes deeper than previous studies in the ONC. We found 487 periodic variables with estimated masses between 0.5 Msun and 0.015 Msun, 124 of which are BD candidates. This is by far the most extensive and complete rotational period data set for young VLM stars and BDs. In addition, 808 objects show non-per...

  9. The properties of brown dwarfs and low-mass hydrogen-burning stars formed by disc fragmentation

    CERN Document Server

    Stamatellos, Dimitris

    2008-01-01

    We suggest that a high proportion of brown dwarfs are formed by gravitational fragmentation of massive extended discs around Sun-like stars. Such discs should arise frequently, but should be observed infrequently, precisely because they fragment rapidly. By performing an ensemble of radiation-hydrodynamic simulations, we show that such discs fragment within a few thousand years, and produce mainlybrown dwarf (BDs) stars, but also planetary mass (PM) stars and very low-mass hydrogen-burning (HB) stars. Most of the the PM stars and BDs are ejected by mutual interactions. We analyse the statistical properties of these stars, and compare them with observations. After a few hundred thousand years the Sun-like primary is typically left with a close low-mass HB companion, and two much wider companions: a low-mass HB star and a BD star, or a BD-BD binary. There is a BD desert extending out to at least ~100 AU; this is because BDs tend to be formed further out than low-mass HB stars, and then they tend to be scattered...

  10. New Brown Dwarfs and an Updated Initial Mass Function in Taurus

    CERN Document Server

    Luhman, K L

    2004-01-01

    I have performed a search for young low-mass stars and brown dwarfs (BDs) in 2 regions encompassing a total area of 4 deg^2 in the Taurus star-forming region, discovering 15 new members of Taurus. In addition, I present 7 new members outside of these areas from the initial stage of a survey of all of Taurus. These 22 objects exhibit spectral types of M4.5-M9.25 and masses of 0.3-0.015 M_sun according to the theoretical evolutionary models of Baraffe and Chabrier, 7 of which are likely to be BDs. Emission in H(alpha), He I, Ca II, [O I], and [S II] and excess emission in optical and near-IR bands among some of these objects suggest the presence of accretion, outflows, and circumstellar disks. The results from the 4 deg^2 survey have been combined with previous studies of Taurus to arrive at an IMF for a total area of 12.4 deg^2. As in the previous IMFs for Taurus, the updated IMF peaks at a higher mass (0.8 M_sun) than the mass functions in IC 348 and Orion (0.1-0.2 M_sun). Meanwhile, the deficit of BDs in Tau...

  11. Multi-wavelength Study of Transition Region Penumbral Subarcsecond Bright Dots Using IRIS and NST

    CERN Document Server

    Deng, Na; Tian, Hui; Kleint, Lucia; Liu, Chang; Xu, Yan; Wang, Haimin

    2016-01-01

    Using high-resolution transition region (TR) observations taken by the Interface Region Imaging Spectrograph (IRIS) mission, Tian et al. (2014b) revealed numerous short-lived subarcsecond bright dots (BDs) above sunspots (mostly located in the penumbrae), which indicate yet unexplained small-scale energy releases. Moreover, whether these subarcsecond TR brightenings have any signature in the lower atmosphere and how they are formed are still not fully resolved. This paper presents a multi-wavelength study of the TR penumbral BDs using a coordinated observation of a near disk-center sunspot with IRIS and the 1.6 m New Solar Telescope (NST) at the Big Bear Solar Observatory. NST provides high-resolution chromospheric and photospheric observations with narrow-band H-alpha imaging spectroscopy and broad-band TiO images, respectively, complementary to IRIS TR observations. A total of 2692 TR penumbral BDs are identified from a 37-minute time series of IRIS 1400 A slitjaw images. Their locations tend to be associat...

  12. Paeonol attenuates inflammation-mediated neurotoxicity and microglial activation

    Institute of Scientific and Technical Information of China (English)

    Kyong Nyon Nam; Byung-Cheol Woo; Sang-Kwan Moon; Seong-Uk Park; Joo-young Park; Jae-Woong Hwang; Hyung-Sup Bae; Chang-Nam Ko; Eunjoo Hwang Lee

    2013-01-01

    Chronic activation of microglial cells endangers neuronal survival through the release of various proinflammatory and neurotoxic factors. The root of Paeonia lactiflora Pall has been considered useful for the treatment of various disorders in traditional oriental medicine. Paeonol, found in the root of Paeonia lactiflora Pall, has a wide range of pharmacological functions, including anti-oxidative, anti-inflammatory and neuroprotective activities. The objective of this study was to examine the efficacy of paeonol in the repression of inflammation-induced neurotoxicity and microglial cell activation. Organotypic hippocampal slice cultures and primary microglial cells from rat brain were stimulated with bacterial lipopolysaccharide. Paeonol pretreatment was performed for 30 minutes prior to lipopolysaccharide addition. Cell viability and nitrite (the production of nitric oxide), tumor necrosis factor-alpha and interleukin-1beta products were measured after lipopolysaccharide treatment. In organotypic hippocampal slice cultures, paeonol blocked lipopolysaccharide-related hippocampal cell death and inhibited the release of nitrite and interleukin-1beta. Paeonol was effective in inhibiting nitric oxide release from primary microglial cells. It also reduced the lipopolysaccharide-stimulated release of tumor necrosis factor-alpha and interleukin-1β from microglial cells. Paeonol possesses neuroprotective activity in a model of inflammation-induced neurotoxicity and reduces the release of neurotoxic and proinflammatory factors in activated microglial cells.

  13. Response to the comment on: “Soon, W., and Legates, D.R., solar irradiance modulation of equator-to-pole (Arctic) temperature gradients: empirical evidence for climate variation on multi-decadal timescales. Journal of Atmospheric and solar-terrestrial physics, 93, (2013) 45-56” by F. Meunier and A. H. Reis

    Science.gov (United States)

    Soon, Willie; Legates, David R.

    2015-06-01

    We thank Meunier and Reis (hereafter as MR) for their comments on our paper. We, however, do not see the relevance of their alternative interpretation to our original results and believe this reflects their confusion regarding our conclusions rather than a discussion on physical mechanisms. In the context of this quote, note that even Pallé et al. (2009:3)admitted that “while the deseasonalized CERES data has a small year to year variability (Fig. 2 of Pallé et al., 2009), the Earthshine data seem to present overly large interannual anomalies, along with a large size of the error bars associated to the yearly means [which] is mostly due to sampling issues, as Earthshine measurements are taken from a single station.”To put this in a different way, the relatively short duration of Earthshine or satellite-borne measurements of global albedo is unable to provide the necessary information on how this important quantity may vary on multi-decadal timescales as studies by Soon and Legates (2013). We note that efforts to 'reconstruct' Earth albedo over a 120-to-130 year period have been discussed by Zavalishin (2014) but we stress that such research requires non-independent information regarding surface temperatures and some unproven assumptions about the thermal inertia of the hydrosphere.

  14. Blowing-machine representation of various meteorological situations for the study of rejection into the atmosphere; Essais de representation en soufflerie des diverses situations meteorologiques pour l'etude des rejets dans l'atmosphere

    Energy Technology Data Exchange (ETDEWEB)

    Chassany, J.Ph. [CEA Marcoule, Centre de Production de Plutonium, 30 (France)

    1964-07-01

    A stratified blowing-machine has been built making it possible to introduce into the tests a vertical temperature gradient. The similitude conditions have been examined. The development tests have made it possible to observe and to film the shape of the smoke pall emitted by a chimney in different cases. Stationary waves have been obtained in steady state conditions and the cross-section of the pall has also been studied. It appears that certain diffusion studies justify the use of a stratified blowing-machine. (author) [French] Une soufflerie stratifiee permettant d'introduire dans les experimentations le gradient vertical de la temperature a ete realisee. Les conditions de similitude ont ete examinees. Des essais de mise au point ont permis d'observer et de filmer l'allure du panache de fumee emis par une cheminee dans differents cas. La formation d'ondes stationnaires en regime stable a ete obtenue et la section droite du panache a ete egalement etudiee. Il apparait que certaines etudes de diffusion doivent justifier l'emploi d'une soufflerie stratifiee. (auteur)

  15. 科布尔黄耆(豆科)新异名及其在中国分布的新资料%New Synonym and New Distribution Records of Astragalus koburensis Bunge (Leguminosae) in China

    Institute of Scientific and Technical Information of China (English)

    张敏; 刘建军; 康永祥; 王平; 徐朗然

    2012-01-01

    Based on specimen collection and identification as well as studies of many other specimens in several major herbaria of China,this paper firstly reported the species Astragalus koburensis Bunge in domestic literature. The previous mistake which identify A. koburensis Bunge with A. galactites Pall. has been corrected. And a species A. ningxiaensis Podlech et L. R. Xu,was reduced to a new synonym of A. koburensis Bunge. Distribution range and eco-geographical characteristics of A. koburensis Bunge in China have also been discussed in this paper.%通过野外标本采集、鉴定和对国内标本馆大量标本的观察研究,在国内文献中首次报道了科布尔黄耆(Astragalus koburensis Bunge);纠正了之前国内几个标本馆将科布尔黄耆鉴定为乳白花黄耆(A.galactites Pall.)的错误;同时将宁夏黄耆(A.ningxiaensis Podlech et L.R.Xu)处理为科布尔黄耆的一个异名;并对科布尔黄耆在中国的分布范围和生态地理特征进行了讨论.

  16. 基于深度置信网络和双谱对角切片的低截获概率雷达信号识别%Research on Low Probability of Intercept Radar Signal Recognition Using Deep Belief Network and Bispectra Diagonal Slice

    Institute of Scientific and Technical Information of China (English)

    王星; 周一鹏; 周东青; 陈忠辉; 田元荣

    2016-01-01

    A novel recognition algorithm for Low Probability of Intercept (LPI) radar signal based on deep learning of radar signals' Bispectra Diagonal Slice (BDS) is proposed in this paper. Firstly, a Deep Belief Network (DBN) model is established on stacked Restricted Boltzmann Machines (RBM), then the model is used for layer-by-layer unsupervised greedy learning of radar signals' BDS. Secondly, a Back Propagation (BP) algorithm is applied to fine tune parameters of DBN model with a supervised way according to learning error. Finally, the BDS-DBN model is constructed to classify and recognize unknown LPI signals. The theoretical analysis and the simulation results show that, the average recognition accuracy of the proposed algorithm for Frequency Modulation Continuous Wave (FMCW), Frank, Costas and FSK/PSK signals can reach 93.4%or ever higher while the SNR is better than 8 dB, which is better than that of Principal Component Analysis-Support Vector Machine (PCA-SVM) algorithm and Principal Component Analysis-Linear Discriminant Analysis (PCA-LDA) algorithm.%基于深度置信网络(DBN)对信号双谱对角切片(BDS)结构特征进行学习,实现低截获概率(LPI)雷达信号识别.该方法首先建立基于受限玻尔兹曼机(RBM)的DBN模型,对LPI雷达信号的BDS数据进行逐层无监督贪心学习,然后运用后向传播(BP)机制在有监督学习方式下根据学习误差对DBN模型参数进行微调,最后基于该BDS-DBN模型实现未知信号的分类和识别.理论分析和仿真结果表明,信噪比高于8 dB时,基于BDS和DBN的识别方法对调频连续波(FMCW),Frank,Costas,FSK/PSK 4类LPI信号的综合识别率保持在93.4%以上,高于传统的主成分分析加支持向量机法(PCA-SVM)和主成分分析加线性判别分析法(PCA-LDA).

  17. Induction and Proliferation Conditions of Onion(Allium cepa L.) Embryogenic Callus%洋葱胚性愈伤组织的诱导及增殖条件的研究

    Institute of Scientific and Technical Information of China (English)

    代月; 吴雄; 朴炫春; 霍雨猛; 缪军; 廉美兰

    2012-01-01

    [目的]探讨洋葱离体培养的最佳条件,为建立其高频再生体系及转基因研究奠定技术基础.[方法]以洋葱(Allium cepa L.)种子为外植体,对洋葱愈伤组织的诱导、胚性愈伤组织获得及增殖的培养条件进行了初步研究.[结果]不同培养基种类对愈伤组织的诱导有影响,BDS优于MS和B5培养基;当培养基中2,4-D浓度为0.5 mg,/L时种子出愈率最高;适当降低生长素浓度,添加分裂素BA能够促进胚性愈伤组织的发生,且无分化现象产生,胚性愈伤组织诱导最佳培养基为BDS+2,4-D 0.25 mg/L+BA 2.0 mg/L,增殖最佳培养基为BDS+2,4-D O.25 mg/L+BA 1.0 mg/L.[结论]该试验建立的基因转化受体系统为洋葱基因转化奠定了良好基础.%[Objective] To explore the best conditions for the in vitro culture of onion, so as to lay technical foundation for its trangenic research and the establishment of high frequency regeneration system. [ Method] With the onion seeds as explants, the induction and proliferation conditions of onion (Alliiim r.epa L. ) callus and embryogenic callus were preliminarily studied. [ Result] The types of callus produced certain impact on the induction of callus, BDS was better than MS and B5; the callus rate was the highest at the concentrations of 0. 5 mg/L 2,4-D; the appropriate reduction of auxin concentration and addition of cytokinin BA could promote the induction of enbryogenic callus without differentiation, the best embryogenic callus induction medium was BDS +2,4-D 0. 25 mg/L + BA 2.0 mg/L and the best proliferation medium was BDS + 2,4-D 0.25 mg/L + BA 1.0 mg/L. [Conclusion] Hie transgenic receptor system established in this experiment lays good foundation for the genetic transformation of onion.

  18. Atmospheric circulation of brown dwarfs and directly imaged extrasolar giant planets with active clouds

    Science.gov (United States)

    Tan, Xianyu; Showman, Adam

    2016-10-01

    Observational evidence have suggested active meteorology in the atmospheres of brown dwarfs (BDs) and directly imaged extrasolar giant planets (EGPs). In particular, a number of surveys for brown dwarfs showed that near-IR brightness variability is common for L and T dwarfs. Directly imaged EGPs share similar observations, and can be viewed as low-gravity versions of BDs. Clouds are believed to play the major role in shaping the thermal structure, dynamics and near-IR flux of these atmospheres. So far, only a few studies have been devoted to atmospheric circulation and the implications for observations of BDs and directly EGPs, and yet no global model includes a self-consistent active cloud formation. Here we present preliminary results from the first global circulation model applied to BDs and directly imaged EGPs that can properly treat absorption and scattering of radiation by cloud particles. Our results suggest that horizontal temperature differences on isobars can reach up to a few hundred Kelvins, with typical horizontal length scale of the temperature and cloud patterns much smaller than the radius of the object. The combination of temperature anomaly and cloud pattern can result in moderate disk-integrated near-IR flux variability. Wind speeds can reach several hundred meters per second in cloud forming layers. Unlike Jupiter and Saturn, we do not observe stable zonal jet/banded patterns in our simulations. Instead, our simulated atmospheres are typically turbulent and dominated by transient vortices. The circulation is sensitive to the parameterized cloud microphysics. Under some parameter combinations, global-scale atmospheric waves can be triggered and maintained. These waves induce global-scale temperature anomalies and cloud patterns, causing large (up to several percent) disk-integrated near-IR flux variability. Our results demonstrate that the commonly observed near-IR brightness variability for BDs and directly imaged EGPs can be explained by the

  19. THE BIOCATALYTIC DESULFURIZATION PROJECT

    Energy Technology Data Exchange (ETDEWEB)

    Scott Collins; David Nunn

    2003-10-01

    The analysis of Petro Star diesel sulfur species is complete and a report is attached. Further analytical efforts will concentrate on characterization of diesel fuel, hydrodesulfurized to varying degrees, in order to determine sulfur species that may be problematic to hydrogen treatment and represent potential target substrates for biodesulfurization in a combined HDS-BDS process. Quotes have been received and are being considered for the partial treatment of Petro Star Inc. marine diesel fuel. Direction of research is changing slightly; economic analysis of the hyphenated--BDSHDS, BDS-CED--has shown the highest probability of success to be with a BDS-HDS process where the biodesulfurization precedes hydrodesulfurization. Thus, the microorganisms will be tailored to focus on those compounds that tend to be recalcitrant to hydrodesulfurization and decrease the severity of the hydrodesulfurization step. A separate, detailed justification for this change is being prepared. Research activities have continued in the characterization of the desulfurization enzymes from multiple sources. Genes for all DszA, -B, -C and -D enzymes (and homologs) have been cloned and expressed. Activity determinations, on a variety of substituted benzothiophene and dibenzothiophene substrates, have been carried out and continue. In addition, chemical synthesis efforts have been carried out to generate additional substrates for analytical standards and activity determinations. The generation of a GSSM mutant library of the ''Rhodococcus IGTS8 dszA'' gene has been completed and development of protocols for a high throughput screen to expand substrate specificity are nearing completion. In an effort to obtain improved hosts as biocatalyst, one hundred-thirty ''Rhodococcus'' and related strains are being evaluated for growth characteristics and other criteria deemed important for an optimal biocatalyst strain. We have also begun an effort to generate

  20. Are female daycare workers at greater risk of cytomegalovirus infection? A secondary data analysis of CMV seroprevalence between 2010 and 2013 in Hamburg, Germany

    Directory of Open Access Journals (Sweden)

    Stranzinger, Johanna

    2016-04-01

    Full Text Available Background: Close contact with asymptomatic children younger than three years is a risk factor for a primary cytomegalovirus (CMV infection. In pregnant women, such primary infection increases the risk of CMV-induced feto- or embryopathy. Daycare providers have therefore implemented working restrictions for pregnant daycare workers (DCWs in accordance with legislation and guidelines for maternity protection. However, little is known about the infection risk for DCWs. We therefore compared the prevalence of CMV antibodies of pregnant DCWs to that of female blood donors (BDs.Method: In a secondary data analysis, the prevalence of anti-CMV IgG among pregnant DCWs (N=509 in daycare centers (DCCs was compared to the prevalence of female first-time BDs (N=14,358 from the greater region of Hamburg, Germany. Data collection took place between 2010 and 2013. The influence of other risk factors such as age, pregnancies and place of residence was evaluated using logistic regression models. Results: The prevalence of CMV antibodies in pregnant DCWs was higher than in female BDs (54.6 vs 41.5%; OR 1.6; 95%CI 1.3–1.9. The subgroup of BDs who had given birth to at least one child and who lived in the city of Hamburg (N=2,591 had a prevalence of CMV antibodies similar to the prevalence in pregnant DCWs (53.9 vs 54.6%; OR 0.9; 95%CI 0.8–1.2. Age, pregnancy history and living in the center of Hamburg were risk factors for CMV infections.Conclusion: The comparison of pregnant DCWs to the best-matching subgroup of female first-time BDs with past pregnancies and living in the city of Hamburg does not indicate an elevated risk of CMV infection among DCWs. However, as two secondary data sets from convenience samples were used, a more detailed investigation of the risk factors other than place of residence, age and maternity was not possible. Therefore, the CMV infection risk in DCWs should be further studied by taking into consideration the potential preventive