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Sample records for choonpa kekkannai sanjigen

  1. Fundamental characteristics of forming bonded magnet power using ultrasonic vibration; Choonpa funmatsu seikei no kihon tokusei

    Energy Technology Data Exchange (ETDEWEB)

    Hashimasa, Y.; Okita, M.; Mino, S.; Ishigaki, N. [Sumitomo Metal Industries, Ltd., Osaka (Japan)

    1997-09-15

    Anisotropic Nd-Fe-B bonded magnet is prepared through the compaction molding of compound composed of Nd2Fe14B magnet powder and resin binder. Utilization of ultrasonic energy has been adopted as direct heating of the compound in stead of indirect heating. Only compound in the dies can be heated in a short time through the compound pressing with ultrasonic vibration using a punch. Under the same molding pressure, powder volume fraction of bonded magnet for the ultrasonic vibration molding was higher than that for the warm compaction molding. Temperature of the compound increased by adding ultrasonic vibration to the compound. Then, lubricating ability was improved with melting binder, which resulted in the improvement of the powder volume fraction of bonded magnet through vibration. Accordingly, it was clarified that mold having the same powder volume fraction of bonded magnet can be obtained under lower pressure using ultrasonic vibration compaction than that using warm compaction molding. 5 refs., 5 figs., 2 tabs.

  2. Faults survey by 3D reflection seismics; Sanjigen hanshaho jishin tansa ni yoru danso chosa

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    Tsuchiya, T.; Ejiri, T.; Yamada, N.; Narita, N.; Aso, H.; Takano, H.; Matsumura, M. [Dia Consultants Company, Tokyo (Japan)

    1996-10-01

    This paper describes fault survey by 3D seismic reflection exploration. Survey has been conducted mainly at flat land area without pavement not in urban area in Japan. Subsurface structure is complicated with intersecting multiple faults. In this area, a lot of geological investigations have been done prior to the seismic reflection exploration. Fairly certain images of faults have been obtained. However, there were still unknown structures. Survey was conducted at an area of 170m{times}280m in the CDP range. Measurements were carried out by using 100 g of dynamite per seismic generation point combined with 40 Hz velocity geophones. Fixed distribution consisting of lattice points of 12{times}12 was adopted as an observation method. In and around the lattice, a great number of explosions were carried out. The CDP stacking method and the method of migration after stacking were used for the data processing. The 3D structures of six horizons and five faults could be interpreted. Interpreted horizons were well agreed with the logging results. 3 figs.

  3. 3D pre-stack time migration; Kiruhihoffuho ni yoru sanjigen jugo mae jikan migration shori

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    Nakajima, Y.; Matsuoka, T. [Japan Petroleum Exploration Corp., Tokyo (Japan); Tsuru, T. [Japan National Oil Corp., Tokyo (Japan)

    1997-05-27

    This paper reports pre-stack migration in elastic wave exploration as to its algorithm and examples of processed data. The time migration processing hypothesizes that seismic waves propagate linearly. It calculates travel time by dividing the sum of the straight distance from a vibration transmitting point to an image point and the straight distance from the image point to a vibration receiving point with RMS velocity given as a parameter. To maintain the relative relation of amplitude sizes, the signal on an elliptic body is made smaller in inverse proportion to the size of that elliptic body. With regard to apparent interval of input trace as seen from the reflection surface, or with regard to density, the signal is made smaller by cos{theta} times. While this program deals with three-dimensional migration, its output turns out as an arbitrary two-dimensional plane. The program requires a huge amount of data processing, whereas a method is used, that the input trace is divided, each group is processed by using separate computers, and the results are summed up. 3 refs., 4 figs.

  4. Near-surface 3D reflections seismic survey; Sanjigen senso hanshaho jishin tansa

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    Nakahigashi, H.; Mitsui, H.; Nakano, O.; Kobayashi, T. [DIA Consultants Co. Ltd., Tokyo (Japan)

    1997-05-27

    Faults are being actively investigated across Japan since the Great Hanshin-Awaji Earthquake. Discussed in this report is the application of the 3D near-surface reflection seismic survey in big cities. Data from trenching and drilling is used for the geological interpretation of the surroundings of a fault, and the reflection seismic survey is used to identify the position, etc., of the fault. In this article, when the results obtained from the experimental field are examined, it is found that the conventional 2D imaging reflection survey betrays the limit of its capability when the geological structure is complicated, that the 3D reflection seismic survey, on the contrary, is capable of high-precision imaging and, when augmented by drilling, etc., becomes capable of a more detailed interpretation, and that it also contributes effectively to the improvement of local disaster prevention in big cities. Using as the model the Tachikawa fault that runs near JR Tachikawa Station, embodiment of the 3D reflection seismic survey is reviewed. For the acquisition of data excellent in quality in a 3D reflection seismic survey conducted utilizing the roads in the sector chosen for experiment in the urban area, the shock generating points and receiving points should be positioned by taking into account the parameters in the bin arranging process so that the mid-points will be regularly distributed on the surface. 3 refs., 11 figs., 1 tab.

  5. Three dimensional wavefield modeling using the pseudospectral method; Pseudospectral ho ni yoru sanjigen hadoba modeling

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    Sato, T.; Matsuoka, T. [Japan Petroleum Exploration Corp., Tokyo (Japan); Saeki, T. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center

    1997-05-27

    Discussed in this report is a wavefield simulation in the 3-dimensional seismic survey. With the level of the object of exploration growing deeper and the object more complicated in structure, the survey method is now turning 3-dimensional. There are several modelling methods for numerical calculation of 3-dimensional wavefields, such as the difference method, pseudospectral method, and the like, all of which demand an exorbitantly large memory and long calculation time, and are costly. Such methods have of late become feasible, however, thanks to the advent of the parallel computer. As compared with the difference method, the pseudospectral method requires a smaller computer memory and shorter computation time, and is more flexible in accepting models. It outputs the result in fullwave just like the difference method, and does not cause wavefield numerical variance. As the computation platform, the parallel computer nCUBE-2S is used. The object domain is divided into the number of the processors, and each of the processors takes care only of its share so that parallel computation as a whole may realize a very high-speed computation. By the use of the pseudospectral method, a 3-dimensional simulation is completed within a tolerable computation time length. 7 refs., 3 figs., 1 tab.

  6. Investigation of data acquisition parameters for Minami Noshiro 3D experiment using 3D seismic modeling; Sanjigen hado denpa modeling wo riyoshita Minami Noshiro sanjigen jishin tansa data shutoku parameter no kento

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    Tanaka, H.; Nakagami, K.; Minegishi, M. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center; Kano, R. [Teikoku Oil Co. Ltd., Tokyo (Japan)

    1996-10-01

    This paper describes how to grasp the characteristics of reflected waves which means how the reflected wave can be received in its magnitude depending on the complicated subsurface structure. Data acquisition parameters were also investigated, as to offset distance distribution and mute setting during the HMO correction. A velocity structure model was prepared for an area of 9km{times}8km including the given 3D seismic exploration area at Minami Noshiro, Akita Prefecture. For the geological sequence used for the velocity structure model, three formations, i.e., Katsurane Formation, Funakawa Formation, and Onagawa Formation, were inputted in an order from the shallower depth on the basis of the depth structure profile obtained from the previous data. Ray tracing was calculated by means of the two-dot dashed line tracing method. For this method, amplitude as well as travel time of waves can be calculated at the same time. This was effective for grasping the magnitude of reflected wave on simulating the traced data. For the velocity structure model used in this study, existing data inputted were old, which limited the quantity of information. However, this model would sufficiently contribute to the verification of survey design and the determination of optimal layout. 1 ref., 3 figs.

  7. Suppression of 3D coherent noise by areal geophone array; Menteki jushinki array ni yoru sanjigen coherent noise no yokusei

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    Murayama, R.; Nakagami, K.; Tanaka, H. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center

    1996-05-01

    For improving the quality of data collected by reflection seismic exploration, a lattice was deployed at one point of a traverse line, and the data therefrom were used to study the 3D coherent noise suppression effect of the areal array. The test was conducted at a Japan National Oil Corporation test field in Kashiwazaki City, Niigata Prefecture. The deployed lattice had 144 vibration receiving points arrayed at intervals of 8m composing an areal array, and 187 vibration generating points arrayed at intervals of 20m extending over 6.5km. Data was collected at the vibration receiving points in the lattice, each point acting independently from the others, and processed for the composition of a large areal array, with the said data from plural vibration receiving points added up therein. As the result of analysis of the records covering the data collected at the receiving points in the lattice, it is noted that an enlarged areal array leads to a higher S/N ratio and that different reflection waves are emphasized when the array direction is changed. 1 ref., 6 figs.

  8. Three-dimensional TDEM modeling using integral equation method. 2; Sekibun hoteishikiho ni yoru TDEM no sanjigen modeling. 2

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    Noguchi, K.; Endo, M. [Waseda University, Tokyo (Japan). School of Science and Engineering

    1996-05-01

    A study was made about integral equation-assisted numerical calculation in a time domain electromagnetic (TDEM) 3D modeling. The total number of cells should be minimized now that the time required for calculation depends a great deal upon the total number of cells. On the assumption of a thin plate-like layer of anomaly in presence, with its center positioned just below the receiving point and with its entirety buried in a homogeneous 100 Ohm m medium, the correlation between the distance and the maximum cell length in the horizontal direction and the method of dividing were examined. As the result, it was found that a dividing method respecting the exponential function shortens the calculation time and that, for obtaining a true response and for minimizing the calculation time, the length of the horizontal side of the cell nearest to the transmission source needs be set to be not more than 1/2 of the distance. It was also found that the length of the side in the direction of depth of the topmost cell needs be set to be not more than approximately 1/3 of the depth of the upper surface of the plate-shaped anomaly. 2 refs., 10 figs., 2 tabs

  9. Three dimensional reflection velocity analysis based on velocity model scan; Model scan ni yoru sanjigen hanshaha sokudo kaiseki

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    Minegishi, M.; Tsuru, T. [Japan National Oil Corp., Tokyo (Japan); Matsuoka, T. [Japan Petroleum Exploration Corp., Tokyo (Japan)

    1996-05-01

    Introduced herein is a reflection wave velocity analysis method using model scanning as a method for velocity estimation across a section, the estimation being useful in the construction of a velocity structure model in seismic exploration. In this method, a stripping type analysis is carried out, wherein optimum structure parameters are determined for reflection waves one after the other beginning with those from shallower parts. During this process, the velocity structures previously determined for the shallower parts are fixed and only the lowest of the layers undergoing analysis at the time is subjected to model scanning. To consider the bending of ray paths at each velocity boundaries involving shallower parts, the ray path tracing method is utilized for the calculation of the reflection travel time curve for the reflection surface being analyzed. Out of the reflection wave travel time curves calculated using various velocity structure models, one that suits best the actual reflection travel time is detected. The degree of matching between the calculated result and actual result is measured by use of data semblance in a time window provided centering about the calculated reflective wave travel time. The structure parameter is estimated on the basis of conditions for the maximum semblance. 1 ref., 4 figs.

  10. Three-dimensional analysis of the magnetic structure in Hokkaido, Japan; Hokkaido no sanjigen jiki kozo kaiseki

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    Makino, M. [Geological Survey of Japan, Tsukuba (Japan)

    1996-10-01

    The magnetic structure in Hokkaido was quantitatively analyzed by the magnetic anomaly distribution. This paper describes its characteristics. Detection of structural boundaries and 3-D analysis of double-layer structure were conducted for the regional magnetic data in a region with about 500 km square. There was not so large difference in patterns of magnetic anomaly distribution between the case that the direction of magnetization was set at 45{degree} to the west during the geomagnetic conversion according to Segawa and Oshima and the case that it was set as same as the current geomagnetic direction. The method of Blakely and Simpson was useful to detect the boundaries of magnetic structures. The structural boundaries obtained were more linear than the iso-magnetic contour lines. A new method has been conceived in which the approximation of 3-D magnetic structure analysis can be deduced, and the irregularity of magnetic basement can be determined by the repeated calculation. In practice, this method was applied to the magnetic data in the whole Hokkaido. The calculation was stably converged. It was found that the magnetic structure obtained in the Kamuikotan/Ishikari-Kitakami magnetic belt exhibited a fault structure having steep slopes accompanied by the basin structure in the western boundaries. 19 refs., 6 figs.

  11. 3D seismic experiment in difficult area in Japan; Kokunai nanchiiki ni okeru sanjigen jishin tansa jikken

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    Minegishi, M.; Nakagami, K.; Tanaka, H. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center

    1997-05-27

    Difficult area in this context means an exploration-difficult area supposed to store oil/gas but retarded in exploration for the lack of knowledge about the geological structure due to poor quality of available seismic survey records. Discussed in this paper is a survey conducted into an area covering the southern part of Noshiro-shi, Akita-ken, and Yamamoto-cho, Yamamoto-gun, Akita-ken. An area size suitable for data collection at a target depth of 2500m is determined using an interpretation structure compiled on the basis of available well data and 2D seismic survey data. The plan for siting shock points and receiving points is modified case by case as restrictive factors come to the surface (resulting from the complicated hilly terrain, presence of pipes for agricultural water, etc.). The peculiarities of seismic waves in the terrain are studied through the interpretation of the available well data and 2D seismic survey data for the construction of a 3D velocity model for the confirmation of the appropriateness of the plan for siting shock points and receiving points. Efforts are exerted through enhanced coordination with the contractor to acquire data so that a technologically best design may be won within the limits of the budget. The quality of the data obtained from this experiment is in general better than those obtained from previous experiments, yet many problems remain to be settled in future studies about exploration-difficult areas. 4 refs., 4 figs., 1 tab.

  12. Flat plate approximation in the three-dimensional slamming; Heiban kinji ni yoru sanjigen suimen shogeki keisanho ni tsuite

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    Toyama, Y. [Mitsui Engineering and Shipbuilding Co. Ltd., Tokyo (Japan)

    1996-12-31

    A slamming load generated by interactive motions between a ship body and water face is an important load in ensuring safety of the ship. A flat plate approximation developed by Wagner is used as a two-dimensional slamming theory, but it has a drawback in handling edges of a flat plate. Therefore, an attempt was made to expand the two-dimensional Wagner`s theory to three dimensions. This paper first shows a method to calculate water face slamming of an arbitrary axisymmetric body by using circular plate approximation. The paper then proposes a method to calculate slamming pressure distribution and slamming force for the case when shape of the water contacting surface may be approximated by an elliptic shape. Expansion to the three dimensions made clear to some extent the characteristics of the three-dimensional slamming. In the case of two dimensions or a circular column for example, the water contacting area increases rapidly in the initial stage generating large slamming force. However, in the case of three dimensions, since the water contacting area expands longitudinally and laterally, the slamming force tends to increase gradually. Maximum slamming pressure was found proportional to square of moving velocity in a water contacting boundary in the case of three dimensions, and similar to stagnation pressure on a gliding plate. 12 refs., 17 figs., 1 tab.

  13. Formation of concentrated solid cluster in a liquid-solid mixture by ultrasonic wave. 3rd Report. Simulation by superposing Oseen`s flow field; Choonpa ni yoru suichu ryushi no cluster keisei. 3. Oseen sokudo kasaneawaseho ni yoru simulation

    Energy Technology Data Exchange (ETDEWEB)

    Asakura, K.; Nakajima, I. [Hokkaido University, Sapporo (Japan); Kaneko, T. [Science and Technology Agency, Tokyo (Japan); Hashimoto, T. [Hokkaido University, Sapporo (Japan). Faculty of Engineering; Imai, T. [Akita University, Akita (Japan). Faculty of Engineering

    1998-10-25

    The numerical calculation was carried out on the reported empirical result in the cluster formation of particles in water by ultrasonic wave. In addition, the attenuation of an ultrasonic wave was measured from sound pressure in a tube. Since the Reynolds number of the particles was less than 2, a method of using a local analytical solution was employed as the calculation method. A method superposing Oseen`s flow field was used for calculating the relative speed of the particles and the fluid. The following knowledge was obtained. It was observed from the actual measurement that the soundwave attenuated with the energy consumed through dispersion and absorption by the polyethylene particles in the fluid. The attenuation coefficient became larger in proportion to the particle concentration, with no difference caused by the particle size. Improvement was found necessary for the method of measuring attenuation factor in a high concentration area. It was judged possible, by verifying the mathematical method, to qualitatively calculate the interaction of the particles by the 1st order Oseen approximation. This method was applicable to a particle flow such as a standing wave in which particle movement is different in direction depending on the position. The method was effective to grasp the interaction of a discrete small number of particles but was limited in a large number. 14 refs., 16 figs.

  14. Measurements of ultrasonic waves by means of laser Doppler velocimeter and an experimental study of elastic wave propagation in inhomogeneous media; Laser doppler sokudokei ni yoru choonpa keisoku to ganseki wo mochiita fukinshitsu baishitsu no hado denpa model jikken

    Energy Technology Data Exchange (ETDEWEB)

    Nishizawa, O.; Sato, T. [Geological Survey of Japan, Tsukuba (Japan); Lei, X. [Dia Consultants Company, Tokyo (Japan)

    1996-05-01

    In the study of seismic wave propagation, a model experimenting technique has been developed using a laser Doppler velocimeter (LDV) as the sensor. This technique, not dependent on conventional piezoelectric devices, only irradiates the specimen with laser to measure the velocity amplitude on the target surface, eliminating the need for close contact between the specimen and sensor. In the experiment, elastic penetration waves with their noise levels approximately 0.05mm/s were observed upon application of vibration of 10{sup 6}-10{sup 5}Hz. The specimen was stainless steel or rock, and waveforms caught by the LDV and piezoelectric device were compared. As the result, it was found that the LDV is a powerful tool for effectively explaining elastic wave propagation in inhomogeneous media. The piezoelectric device fails to reproduce accurately the waves to follow the initial one while the LDV detect the velocity amplitude on the specimen surface in a wide frequency range encouraging the discussion over the quantification of observed waveforms. 10 refs., 7 figs.

  15. Experimental study on the aerodynamic performance of 3-dimensional vortex-blowers. Sanjigen uzuryu blower no kuriki seino ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Yamazaki, S.; Ito, E.; Fujio, M.; Fujita, H. (Hitachi, Ltd., Tokyo (Japan))

    1992-10-25

    Vortex blowers with two-dimensional blades have such deficiencies as low aerodynamic performance and high noise. Accordingly, discussions have been given on effects of three-dimensionalized blades on internal flows and aerodynamic performance with the objective of making the vortex blowers smaller in size, higher in performance, and lower in noise. A spiral flow exists in the flow path in a casing, which has its flow velocity increased as the flow rate is decreased. The flow velocity at the closing point reaches about two times as large as the circumferential speed of the blades in the case of having three-dimensional leading blades. The spiral flow outflowing from outer circumference of the blades into the casing flow path has its flow velocity nearly halved while swirling in semi-circular form in the casing flow path, by which a vortex blower converts the total pressure in the casing flow path to a static pressure. When the outlet angle in the axial direction is changed from 90[degree] (two-dimensional blade) to 50[degree](three-dimensional leading blade), the flow velocity components increase largely in the circumferential direction, with the pressure coefficient and the dynamic coefficient increasing by about two fold respectively. When the inlet angle in the axial direction is reduced to 40[degree] , the blade incident loss reduces, while the pressure coefficient improves by about 20% and the heat insulation efficiency by about 30%. 4 refs., 15 figs., 1 tab.

  16. Improvement of wells turbine performance by means of 3D guide vanes; Sanjigen annai hane ni yoru wells turbine seino no kaizen

    Energy Technology Data Exchange (ETDEWEB)

    Takao, M.; Kim, T.H. [Saga University, Saga (Japan); Setoguchi, T. [Saga University, Saga (Japan). Faculty of Science and Engineering; Inoue, M. [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    2000-02-25

    Performance of a Wells turbine was improved by equipping 3D guide vanes before and behind a rotor. For further improvement, 3D guide vanes have been proposed in this paper. The performance of the Wells turbine with 2D and 3D guide vanes have been investigated experimentally by model testing under steady flow conditions. Then, the running and starting characteristics in irregular ocean waves have been obtained by a computer simulation. As a result, it is found that both of the running and starting characteristics of the Wells turbine with 3D guide vanes are superior to those of the turbine with 2D guide vanes. (author)

  17. Improved design of three-dimensional lens for low concentrator PV modules; Teishukogata taiyo denchiyo sanjigen lens no koseinoka ni kansuru kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Goma, S.; Yoshioka, K.; Saito, T. [Tokyo Univ. of Agriculture and Technology, Tokyo (Japan)

    1997-11-25

    Attention is paid to reduction in area required for solar cells by solar concentration as a means of solving cost limits of solar cells and unstable supply of Si materials. Low concentration solar cells are effective from the aspects of utilization of scattered light and unnecessary ray tracing. The optical concentration ratio was calculated of three-dimensional lens having design values of various north/south and east/west direction allowable incidence half angles. The three-dimensional lens are designed by cutting a rectangular parallelepiped by the two-dimensional composite elliptical plane designed by various allowable incidence half angles from two directions of north/south and east/west. Using Perez`s sky solar radiation models and meteorological data HASP, calculated were the annual accumulated global radiation ratio on an inclined surface and the optical efficiency. Calculated were the solar cell area ratio and solar concentration area ratio of the concentration type to obtain solar radiation the same as that of the planar type. From the optimization calculation, it was found that lens are optimal which have design values of north/south and east/west direction allowable incidence half angles of 30-70deg. The solar cell area ratio is 57% and the solar concentration area ratio is 1.2 times. It was found that by making the module area 1.2 times, more than 40% of the solar cells used can be saved. 5 refs., 8 figs.

  18. Three-dimensional seismic survey planning based on the newest data acquisition design technique; Saishin no data shutoku design ni motozuku sanjigen jishin tansa keikaku

    Energy Technology Data Exchange (ETDEWEB)

    Minehara, M.; Nakagami, K.; Tanaka, H. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center

    1996-10-01

    Theory of parameter setting for data acquisition is arranged, mainly as to the seismic generating and receiving geometry. This paper also introduces an example of survey planning for three-dimensional land seismic exploration in progress. For the design of data acquisition, fundamental parameters are firstly determined on the basis of the characteristics of reflection records at a given district, and then, the layout of survey is determined. In this study, information through modeling based on the existing interpretation of geologic structures is also utilized, to reflect them for survey specifications. Land three-dimensional seismic survey was designed. Ground surface of the surveyed area consists of rice fields and hilly regions. The target was a nose-shaped structure in the depth about 2,500 m underground. A survey area of 4km{times}5km was set. Records in the shallow layers could not obtained when near offset was not ensured. Quality control of this distribution was important for grasping the shallow structure required. In this survey, the seismic generating point could be ensured more certainly than initially expected, which resulted in the sufficient security of near offset. 2 refs., 2 figs.

  19. Three-dimensional mise-a-la-masse modeling using horizontal well; Suihei kosei wo mochiita ryuden den`iho no sanjigen modeling

    Energy Technology Data Exchange (ETDEWEB)

    Mizunaga, H.; Ushijima, K.; Hashimoto, K.; Masuda, K. [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    1996-10-01

    The 3-D model program was developed to apply a mise-a-la-masse method to linear current sources with optional shapes. Mise-a-la-masse method is a bipolar mapping survey method using current sources installed in wells, and recently has been widely used for direct exploration of geothermal reservoirs. This method is also used for monitoring underground fluid as electrode arrangement of fluid flow tomography for surveying underground fluid (geothermal fluid, underground water, petroleum). In the geothermal reservoir exploration, the casing pipes of wells are used as linear current sources, and measured data are processed as those based on vertical current source. In the largely inclined well, the inclination of current sources should be considered. The 3-D modeling program was developed by difference calculus using the theoretical potential equation and apparent resistivity based on linear current sources with optional 3-D shapes. The numerical model experiment result clarified that the previous theoretical equation for vertical wells is inapplicable to inclined linear current sources because of clear asymmetric apparent resistivity distribution. 6 refs., 6 figs.

  20. Pseudo-random data acquisition geometry in 3D seismic survey; Sanjigen jishin tansa ni okeru giji random data shutoku reiauto ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Minegishi, M.; Tsuburaya, Y. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center

    1996-10-01

    Influence of pseudo-random geometry on the imaging for 3D seismic exploration data acquisition has been investigate using a simple model by comparing with the regular geometry. When constituting wave front by the interference of elemental waves, pseudo-random geometry data did not always provide good results. In the case of a point diffractor, the imaging operation, where the constituted wave front was returned to the point diffractor by the interference of elemental waves for the spatial alias records, did not always give clear images. In the case of multi point diffractor, good images were obtained with less noise generation in spite of alias records. There are a lot of diffractors in the actual geological structures, which corresponds to the case of multi point diffractors. Finally, better images could be obtained by inputting records acquired using the pseudo-random geometry rather than by inputting spatial alias records acquired using the regular geometry. 7 refs., 6 figs.

  1. 3-D simulation of flows in a stationary straight cascade; Sentan sukima no aru seishi chokusen yokuretsu no nagare no sanjigen suchi simulation

    Energy Technology Data Exchange (ETDEWEB)

    Miyake, Y.; Kajishima, T. [Osaka University, Osaka (Japan). Faculty of Engineering; Nakade, K. [Osaka University, Osaka (Japan)

    1997-12-25

    A full three-dimensional simulations by means of a finite difference method of incompressible near-stall flows in a stationary straight cascade of blades is presented in this report. The aim of the work is to compare the flows with those in a rotating cascade which is described in the accompanying paper. Two cascades are nearly identical in geometry with respect to inlet flow condition, namely, same attack angle which is uniform in spanwise direction and also to flow in tip clearance. It is intended in these works to examine the validity of two-dimensional simulation of stalled flow in which flow-normal vortices play key role. The basis of the presumed flow pattern is too much different from measured flows and it is required to clarify the mechanism of the difference, in order to make two-dimensional simulation valid. The simulation presented here suggests that the flows, even if they are three dimensional, are basically similar to two-dimensional cascade flows but are quite different from those in the corresponding rotating cascade, due to centrifugal force applied in the latter. 9 refs., 12 figs., 1 tab.

  2. 3-D volume rendering visualization for calculated distributions of diesel spray; Diesel funmu kyodo suchi keisan kekka no sanjigen volume rendering hyoji

    Energy Technology Data Exchange (ETDEWEB)

    Yoshizaki, T.; Imanishi, H.; Nishida, K.; Yamashita, H.; Hiroyasu, H.; Kaneda, K. [Hiroshima University, Hiroshima (Japan)

    1997-10-01

    Three dimensional visualization technique based on volume rendering method has been developed in order to translate calculated results of diesel combustion simulation into realistically spray and flame images. This paper presents an overview of diesel combustion model which has been developed at Hiroshima University, a description of the three dimensional visualization technique, and some examples of spray and flame image generated by this visualization technique. 8 refs., 8 figs., 1 tab.

  3. Three dimensional numerical modeling for investigation of fracture zone filled with water by borehole radar; Borehole radar ni yoru gansui hasaitai kenshutsu no sanjigen suchi modeling

    Energy Technology Data Exchange (ETDEWEB)

    Sanada, Y.; Watanabe, T.; Ashida, Y. [Kyoto University, Kyoto (Japan); Hasegawa, K.; Yabuuchi, S. [Power Reactor and Nuclear Fuel Development Corp., Tokyo (Japan)

    1997-05-27

    Water bearing fracture zones existing in rock mass largely influence the underground water flow and dynamic property of rock mass. The detailed survey of the location and size of water bearing fracture zones is an important task in the fields such as civil engineering, environment and disaster prevention. Electromagnetic waves of high frequency zones can be grasped as a wave phenomenon, and the record obtained in the actual measurement is wave forms of time series. In the exploration using borehole radar, this water bearing fracture zone becomes the reflection surface, and also becomes a factor of damping in the transmitted wave. By examining changes which these give to the observed wave forms, therefore, water bearing fracture zones can be detected. This study made three dimensional numerical modeling using the time domain finite difference method, and obtained the same output as the observed wave form obtained using borehole radar. By using this program and changing each of the parameters such as frequency and resistivity in the homogeneous medium, changes of the wave forms were observed. Further, examples were shown of modeling of detection of water bearing fracture zones. 5 refs., 16 figs., 1 tab.

  4. Fundamental study of interpretation technique for 3-D magnetotelluric data using neural networks; Neural network wo mochiita sanjigen MT ho data kaishaku gijutsu no kisoteki kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    Kobayashi, T.; Fukuoka, K.; Shima, H. [Oyo Corp., Tokyo (Japan); Mogi, T. [Kyushu University, Fukuoka (Japan). Faculty of Engineering; Spichak, V.

    1997-05-27

    The research and development have been conducted to apply neural networks to interpretation technique for 3-D MT data. In this study, a data base of various data was made from the numerical modeling of 3-D fault model, and the data base management system was constructed. In addition, an unsupervised neural network for treating noise and a supervised neural network for estimating fault parameters such as dip, strike and specific resistance were made, and a basic neural network system was constructed. As a result of the application to the various data, basically sufficient performance for estimating the fault parameters was confirmed. Thus, the optimum MT data for this system were selected. In future, it is necessary to investigate the optimum model and the number of models for learning these neural networks. 3 refs., 5 figs., 2 tabs.

  5. Simulation study using 3-D wavefield modeling for oil and gas exploration; Sanjigen hadoba modeling wo mochiita sekiyu tanko no simulation study

    Energy Technology Data Exchange (ETDEWEB)

    Sato, T.; Matsuoka, T. [Japan Petroleum Exploration Corp., Tokyo (Japan); Saeki, T. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center

    1997-05-27

    As the surroundings of objects of oil exploration grow more complicated, seismic survey methods have turned 3-dimensional and, in this report, several models are examined using the 3-dimensional simulation technology. The result obtained by the conventional wave tracking method is different from actual wavefields, and is unrealistic. The difference method among the fullwave modelling methods demands an exorbitantly long computation time and high cost. A pseudospectral method has been developed which is superior to the difference method, and has been put to practical use thanks to the advent of parallel computers. It is found that a 3-dimensional survey is mandatory in describing faults. After examining the SEG/EAGE Salt model, it is learned that the salt is well-developed and that 3-dimensional depth migration is required for sub-salt exploration. It is also found through simulation of the EAGE/S Overthrust model, which is an elastic model, that no quality records are available on thrust zones in complicated terrains. The records are poor in quality since the actually measured wavefield is regarded as an acoustic wavefield when it is an elastic wavefield. 1 refs., 18 figs., 2 tabs.

  6. Indirect boundary element method for three dimensional problems. Analytical solution for contribution to wave field by triangular element; Sanjigen kansetsu kyokai yosoho. Sankakukei yoso no kiyo no kaisekikai

    Energy Technology Data Exchange (ETDEWEB)

    Yokoi, T. [Building Research Institute, Tokyo (Japan); Sanchez-Sesma, F. [Universidad National Autonoma de Mexico, (Mexico). Institute de Ingenieria

    1997-05-27

    Formulation is introduced for discretizing a boundary integral equation into an indirect boundary element method for the solution of 3-dimensional topographic problems. Yokoi and Takenaka propose an analytical solution-capable reference solution (solution for the half space elastic body with flat free surface) to problems of topographic response to seismic motion in a 2-dimensional in-plane field. That is to say, they propose a boundary integral equation capable of effectively suppressing the non-physical waves that emerge in the result of computation in the wake of the truncation of the discretized ground surface making use of the wave field in a semi-infinite elastic body with flat free surface. They apply the proposed boundary integral equation discretized into the indirect boundary element method to solve some examples, and succeed in proving its validity. In this report, the equation is expanded to deal with 3-dimensional topographic problems. A problem of a P-wave vertically landing on a flat and free surface is solved by the conventional boundary integral equation and the proposed boundary integral equation, and the solutions are compared with each other. It is found that the new method, different from the conventional one, can delete non-physical waves from the analytical result. 4 figs.

  7. Three dimensional flow analysis in a radial turbine rotor. 2nd Report. Flow field near tip clearance and turbine efficiency; Radial turbine nai nagare no sanjigen suchi kaiseki. 2. Yokutan sukima kinbo no nagare to turbine koritsu ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Tsuchiya, N. [The University of Tokyo, Tokyo (Japan); Yoshiki, H. [The University of Tokyo, Tokyo (Japan). Institute of Industrial Science

    1999-08-25

    Three dimensional viscous flow analysis was performed in a radial turbine rotor. Tip clearance area was filled with another computational grid and multi-block analysis code was adopted. Clearance height was changed from 0 mm to 1 mm to investigate its influence to leakage flow and turbine efficiency. The results showed that flow field near tip clearance was mainly decided by relation between scraping flow and leakage jet. Leakage mass flow increased greatly at the latter half of rotor passage. Turbine efficiency tended to improve as tip clearance became small. Especially good improvement was found between 0.5 mm and 0.25 mm. It may be cause that scraping flow was dominant at the middle of rotor passage. (author)

  8. Estimation of subsurface structures in a Minami Noshiro 3D seismic survey region by seismic-array observations of microtremors; Minami Noshiro sanjigen jishin tansa kuikinai no hyoso kozo ni tsuite. Bido no array kansoku ni yoru suitei

    Energy Technology Data Exchange (ETDEWEB)

    Okada, H.; Ling, S.; Ishikawa, K. [Hokkaido University, Sapporo (Japan); Tsuburaya, Y.; Minegishi, M. [Japan National Oil Corp., Tokyo (Japan). Technology Research Center

    1997-05-27

    Japan National Oil Corporation Technology Research Center has carried out experiments on the three-dimensional seismic survey method which is regarded as an effective means for petroleum exploration. The experiments were conducted at the Minami Noshiro area in Akita Prefecture. Seismometer arrays were developed in radii of 30 to 300 m at seven points in the three-dimensional seismic exploration region to observe microtremors. The purpose is to estimate S-wave velocities from the ground surface to the foundation by using surface waves included in microtremors. Estimation of the surface bed structure is also included in the purpose since this is indispensable in seismic exploration using the reflection method. This paper reports results of the microtremor observations and the estimation on S-wave velocities (microtremor exploration). One or two kinds of arrays with different sizes composed of seven observation points per area were developed to observe microtremors independently. The important point in the result obtained in the present experiments is that a low velocity bed suggesting existence of faults was estimated. It will be necessary to repeat experiments and observations in the future to verify whether this microtremor exploration method has that much of exploration capability. For the time being, however, interest is addressed to considerations on comparison with the result of 3D experiments using the reflection method. 4 refs., 7 figs.

  9. Three-dimensional computer simulation at vehicle collision using dynamic model. Application to various collision types; Rikigaku model ni yoru jidosha shototsuji no sanjigen kyodo simulation. Shushu no shototsu keitai eno tekiyo

    Energy Technology Data Exchange (ETDEWEB)

    Abe, M.; Morisawa, M. [Musashi Institute of Technology, Tokyo (Japan); Sato, T. [Keio University, Tokyo (Japan); Kobayashi, K. [Molex-Japan Co. Ltd., Tokyo (Japan)

    1997-10-01

    The past study of safety at vehicle collision pays attention to phenomena within the short time from starting collision, and the behavior of rollover is studied separating from that at collision. Most simulations of traffic accident are two-dimensional simulations. Therefore, it is indispensable for vehicle design to the analyze three-dimensional and continuous behavior from crash till stopping. Accordingly, in this study, the three-dimensional behavior of two vehicles at collision was simulated by computer using dynamic models. Then, by comparison of the calculated results with real vehicles` collision test data, it was confirmed that dynamic model of this study was reliable. 10 refs., 6 figs., 3 tabs.

  10. Wetting on a plate with three-dimensional random heterogeneity and roughness. Equilibrium state and contact angle observed macroscopically; Sanjigen random na seijo wo motsu kotaimenjo deno nure kyodo. Energy heiko joken to kyshitekina sesshokukaku no kankei ni tsuite

    Energy Technology Data Exchange (ETDEWEB)

    Kato, K.; Azuma, T. [Osaka City Univ., Osaka (Japan)

    1999-11-25

    A theoretical study was conducted to investigate the wetting behavior of liquid meniscus on a vertical plate with three-dimensional random characteristics of heterogeneity and roughness. The thermodynamic stable condition was derived by considering the minimum of system free energy. The local stable condition leads to a result similar to that obtained for a plate with two-dimensional characteristics, i.e., the system has many meta-stable states. For the stable condition of the whole system, a relation was derived between macroscopically observed contact angle and the surface characteristics. The product of cosine of the contact angle and liquid surface tension is equal to the energy difference for the liquid to wet the plate by apparent unit area. If the liquid wets the solid surface reversibly, there is only one contact angle observed macroscopically. This fact suggests that the contact angle hysteresis is caused by the irreversible motion when the liquid advances or recedes on the solid surface. The well-known Cassie and Wenzel's contact angles are explained as those corresponding to thermodynamically stable condition when the liquid wets the solid reversibly. (author)

  11. Three-dimensional analysis of internal flow characteristics in the injection nozzle tip of direct-injection diesel engines; Sanjigen suchi kaiseki ni yoru DI diesel kikan no nenryo funsha nozzle nai ryudo tokusei no kaimei

    Energy Technology Data Exchange (ETDEWEB)

    Ogawa, H.; Matsui, Y.; Kimura, S. [Nissan Motor Co. Ltd. Tokyo (Japan)

    1997-10-01

    To reduce the exhaust emissions and fuel consumption of direct-injection diesel engines, it is essential to optimize the fuel injection equipment closely related to combustion and emission characteristics. In this study, three-dimensional computation has been applied to investigate the effects of the injection nozzle specifications (e.g., sac volume, round shape at the inlet of the nozzle hole) and needle tip deviation on internal flow characteristics. The computational results revealed that the effects of the nozzle specifications and needle tip deviation with a smaller needle lift on internal flow characteristics and a general approach to optimize the injection nozzle specifications were obtained. 3 refs., 10 figs., 1 tab.

  12. Characteristics of the fluorescent substances in the Yodo River system by three-dimensional excitation emission matrix spectroscopy; Sanjigen reiki/keiko kodoho ni yoru yodogawa suikeichu no keiko busshitsu no tokucho

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, Y.; Nakaguchi, Y.; Hiraki, K.; Kudo, M.; Kimura, M.; Nagao, S. [Japan Atomic Energy Research Inst., Tokyo (Japan)

    1998-08-01

    Organic substances in the river water in Yodo River system were analyzed by three-dimensional excitation emission matrix spectroscopy. Fluorescent substances were taken as an index of organic substances. The amount of fluorescent substances varied widely depending on the environment of river basin. It is suggested that the fluorescent substances are composed of organic substances which is not directly originated from biological activity. It is suggested that the fluorescent substances were produced by leaching of river bottom sediment. The fluorescent substances in Yodo River system consists of fulvic acid-like substances and protein. The analysis of fluorescent substances in river water by three-dimensional excitation emission matrix spectroscopy can be useful means for estimation of variation and origin of fluorescent substances. For better understanding of features of fluorescent substances in the surface water into which various kinds of substances enter, it is necessary to determine the exact sampling points based on the consideration of different sources and to make a database of peak positions for identification of fluorescent substances from fluorescence intensity peak. 29 refs., 3 figs., 2 tabs.

  13. Three-dimensional modeling in the electromagnetic/magnetotelluric methods. Accuracy of various finite-element and finite difference methods; Denjiho MT ho ni okeru sanjigen modeling. Shushu no yugen yosoho to sabunho no seido

    Energy Technology Data Exchange (ETDEWEB)

    Sasaki, Y. [Kyushu University, Fukuoka (Japan). Faculty of Engineering

    1997-05-27

    To enhance the reliability of electromagnetic/magnetotelluric (MT) survey, calculation results of finite-element methods (FEMs) and finite difference methods (FDMs) were compared. Accuracy of individual methods and convergence of repitition solution were examined. As a result of the investigation, it was found that appropriate accuracy can be obtained from the edge FEM and FDM for the example of vertical magnetic dipole, and that the best accuracy can be obtained from the FDM among four methods for the example of MT survey. It was revealed that the ICBCG (incomplete Cholesky bi-conjugate gradient) method is an excellent method as a solution method of simultaneous equations from the viewpoint of accuracy and calculation time. For the joint FEM, solutions of SOR method converged for both the examples. It was concluded that the cause of error is not due to the error of numerical calculation, but due to the consideration without discontinuity of electric field. The conditions of coefficient matrix increased with decreasing the frequency, which resulted in the unstable numerical calculation. It would be required to incorporate the constraint in a certain form. 4 refs., 12 figs.

  14. 3D seismic survey in Honjo, Akita. Problems and struggles in acquisition and processing; Akitaken Honjo koku ni okeru sanjigen jishin tansa. Genba sagyo to data shori ni okeru mondaiten

    Energy Technology Data Exchange (ETDEWEB)

    Imahori, S.; Kotera, Y.; Nakanishi, T. [Japan Energy Development Co. Ltd., Tokyo (Japan)

    1997-05-27

    Honjo mining area where investigations are conducted is hilly and has a complicated terrain with gas pipes buried in the ground just under the access road disabling the proper positioning of shock-generating large excavators or vibrators. Auger`s shallow hole shooting method is used in this survey to execute blastings at 639 points. In this method using charge depths of 4m, different from the conventional method using deeper charge depths (20-25m), surface waves prevail in the shot records giving rise to a new problem of removing them in the stage of data processing. The 2D filter that is a powerful tool in 2D data processing is not available in a 3D-survey where the tracing intervals are irregular in the shot records. In the effort of this time, a window length as a parameter in the direction of time is specified, and the F-X dip filtering method is employed in which any event that linearly continues beyond a certain number of traces in the said window is eliminated as a linear noise. It is recommended that the weighting function be changed in the direction of space since surface wave velocities are different at different locations. 1 fig., 1 tab.

  15. Leading research report for fiscal 1998. Research and study of 3-dimensional cell structure module engineering; 1998 nendo sendo chosa kenkyu hokokusho. Sanjigen saibo soshiki module kogaku chosa kenkyu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    For the formation of cellular tissues to replace bionic tissues, researches were conducted about technologies of forming bionic tissue modules by culturing various kinds of cells. As for the materials and methods for constructing cellular tissues, researches were conducted about the trends of research and development of 3-dimensional tissue culturing matrices and materials for micromanipulation. As for the development of technologies for the functionalization of 3-dimensionally structured cells, research and study were conducted about the technology of 3-dimensional cell structure organization through application of physical stimulation, the biochemical technology of differentiation inducing, and the differentiation inducing technology for hetero tissue culturing. As for the development of technologies for evaluation using 3-dimensionally structured cells, light CT (computer tomography), analysis and evaluation using spectroscopy and the like, feasibility of the biochemical analysis of the cell state using biosensors, technologies for measuring the secretion of carcinogenic and toxic substances, etc., were studied. In addition, the development of organic models to replace test animals, industrial evolution of 3-dimensional tissue module engineering, etc., were investigated. (NEDO)

  16. Fiscal 1999 achievement report on regional consortium research and development project. Regional consortium research field (Development of super-devices for medical equipment by 3-dimensional microstructure machining technology - 3rd year); 1999 nendo micro sanjigen kako gijutsu ni yoru iryo kikiyo super device no kaihatsu seika hokokusho (dai 3 nendo)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2000-03-01

    In the development of micromechanisms, a highly efficient micromotor capable of outputting 25g/cm is developed, in which a DC motor, 4mm in diameter and 12.5mm in length, and a deceleration mechanism are combined. A technology is established of manufacturing microtubes 0.1mm in internal diameter of various materials for use with medical equipment. A direct cam screw type discharge mechanism for minute amounts is developed. It is now foreseen that a cartridge (air pressurized) discharge mechanism and a tube pump will be commercialized. A microjoint is developed with a built-in micro check valve for medicine flow channels. A microfilter is developed using a polypropylene hollow yarn membrane. A microsensor is developed, which responds to a 0.01-second change in flow rate at an error rate of {+-}3% or less. A microcomputer control system is test-produced. Newly developed devices are integrated for the test production of a portable device for sustained infusion of medicine, and the product is found to be superior to the existing systems. Also described are the utilization of various micromachining techniques. (NEDO)

  17. Fiscal 2000 achievement report on the research and development of medical and welfare apparatus/technology High-speed and 3-dimensional X-ray CT system using cone beam X-ray (Energy use rationalization); 2000 nendo iryo fukushi kiki gijutsu kenkyu kaihatsu seika hokokusho. Kosoku cone beam sanjigen X sen CT (energy shiyo gorika)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    2001-05-01

    In the study of a 3-dimensional data reconstruction system, the fabrication of an interface to serve between the data transmission section and the image reconstruction unit was complete, and evaluation was started of its performance and capability. In the effort to develop a 3-dimensional image processing system, specifications were deliberated for image reading systems and DICOM (digital imaging and communications in medicine) converters for clinical research, and articles to be ordered were selected. For dealing with a multi-platform system and enabling image-aided dignoses by plural users, a browser plug-in type web-based GUI (graphical user interface) was employed as the user interface and in the image server. The system construction was complete, and performance evaluation was started. In developing the total system, designing and manufacturing were started of the data transmission section, the bed and its rotary mount, and the high-voltage generation unit for the X-ray tube and X-rays. Preparation was started of a system control software program. (NEDO)

  18. Fiscal 1998 research report. R and D on the nanometer-controlled optical disk system / Magnetic domain- response 3-D optical memory technology (Development of rational use technology of energy); 1998 nendo nanometa seigyo hikari disk system no kenkyu kaihatsu seika hokokusho (jiku oto sanjigen hikari memory gijutsu). Energy shiyo gorika gijutsu kaihatsu

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    This report describes the fiscal 1998 result on the magnetic domain-response 3-D optical memory of the nanometer-controlled optical disk system. The magnetic domain response technology is a next-generation optical disk technology which copies fine bits recorded on a recording layer on a read-out layer while magnifying them, and detects the bit smaller than a read out optical spot as large signal level. Magnetic domain-response read out of a fine magnetic domain of 0.12{mu}m in mark length and 0.60{mu}m in track width recorded by optical pulse magnetic field modulation was attempted under the conditions of conventional wavelength (around 680nm) and NA (0.55), and succeeded in expanding unobservable signals up to saturated amplitudes. This is equivalent to a 2-D recording density of 10Gbit/in{sup 2}. Crosstalk-free read out was also verified. As for R and D on the magnetic circular polarization enhanced multiple read out system, the 2-wavelength read out system was fabricated by using 515nm Ar laser light and 780nm semiconductor laser light. It was verified in 2- wavelength read out test that the multi-wavelength read out system is reasonable theoretically. (NEDO)

  19. Achievement report for fiscal 1998 on research and development project for regional consortiums. Regional consortium field (Development of a three-dimensional high-speed bio-micromanipulation system (the second year)); 1998 nendo chiiki consortium bun'ya. Sanjigen kosoku bio micro manipuration system no kaihatsu (dai 2 nendo)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    Research and development are made on a bio-micromanipulation system that can substitute human being to perform three-dimensionally selective, large-quantity, repeated, high-speed and high-accuracy processing in micro and nano zones in bio-technologies. Fiscal 1998 has incorporated different component technologies into the common platform structured in last year to structure a high-speed laser manipulator separating device and a three-dimensional micromanipulation device and to perform basic experiments. The structure can sort out arbitrarily only the selected species from a large quantity of microorganisms dispersed in aqueous solution, and separate them at a high speed. Intended objects are trapped by laser beam, and substances other than those intended are removed from the electric field. Then, the trapped objects are moved by laser beam and recovered. This operation can be performed even at DNA level. A positioning and fixing device for cell anatomy was manufactured on a trial basis. In addition, a three-dimensional micromanipulation device was structured, and basic experiments were carried out on force measurement and control. A micro flow path forming technology was established by using a micro processing technology. This paper also describes a commercialization survey. (NEDO)

  20. Achievement report for fiscal 1998 on research and development project for regional consortiums. Regional consortium field (Development of super devices for medical treatment devices using three-dimensional micro processing technology (the second year)); 1998 nendo chiiki consortium bun'ya. Maikuro sanjigen kako gijutsu ni yoru iryo kikiyo super device no kaihatsu (dai 2 nendo)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    It is intended to develop super devices for medical treatment devices using a three-dimensional micro processing technology by developing and combining precision processing technologies accumulated in the Suwa area. Main targets were placed on device size reduction, and a high reliability portable chemical liquid sustaining injector. This paper describes achievements made in fiscal 1998. Micromotors currently used have as low output torque as 1/4 of the target. Enhancement of reduction gear mechanism efficiency and durability is the problem to be solved. Microtubes with an inner diameter of 0.1 mm were produced on a trial basis by using four kinds of materials. The delivery mechanism assured the targeted flow rate successfully by using the direct cum screw system, but reduction in driving torque is desired. Completion of the cartridge system is also in the realm of aim. Joints will be moved closer to commercialization by selecting materials taking into account the chemical resistance and disposition. Micro connectors and cables still have problems for development. The bubble sensor was virtually decided to be of optical type from the points of detection performance requirements. Detectors and peripheral devices will be reduced in dimensions, and their reliability will be enhanced. The flow rate sensor has a problem to be solved in responsiveness to intermittent flows. (NEDO)

  1. Ionization current in N2 gas. 11. Three dimensional analysis for loss processes of metastable particles affected by the reflection at the boundary; N2 gas chu ni okeru denri denryu. 11. Kyokai deno hansha wo koryoshita jun`antei reiki ryushi sonshitsu katei no sanjigen kaiseki

    Energy Technology Data Exchange (ETDEWEB)

    Suzuki, S.; Ito, H.; Sekizawa, H.; Ikuta, N. [Chiba Institute of Technology, Chiba (Japan)

    1998-10-01

    Loss processes of the nitrogen metastable molecule N2(A{sup 3}{Sigma}u{sup +}) in plane parallel electrodes have been investigated by us previously by solving the diffusion equation. Our procedure is based on an analysis using the third kind of boundary condition which can take account of finite values for the density of N2(A{sup 3}{Sigma}u{sup +}) at the electrode surfaces. The values of the effective lifetime of N2(A{sup 3}{Sigma}u{sup +}) calculated from this analysis were reasonably consistent with our experiments. This paper describes the behavior of the effective lifetimes of N2(A{sup 3}{Sigma}u{sup +}) in a cylindrical cavity. The analytical treatment of the diffusion equation for N2(A{sup 3}{Sigma}u{sup +}) proposed by us is extended to the three dimensional space. We report the nature of the effective lifetimes of metastable molecule in the cylindrical cavity systematically. 16 refs., 9 figs.

  2. Non-Newtonian fluid flow and heat transfer in a porous medium. 2nd Report. Prediction of porous inertia based on a three-dimensional numerical model; Takoshitsutainai no hi Newton ryutai no netsuryudo. 2. Sanjigen suchi model ni yoru takoshitsutai kansei koka no yosoku

    Energy Technology Data Exchange (ETDEWEB)

    Inoue, M.; Nakayama, A. [Shizuoka University, Shizuoka (Japan). Faculty of Engineering

    1996-09-25

    Three-dimensional numerical calculations have been performed to simulate the viscous and porous inertia effects on the pressure drop in a non-Newtonian fluid flow through a porous medium. Cubes placed in an infinite space have been proposed as a three-dimensional model of microscopic porous structure. A full set of three-dimensional momentum equations is solved along with the continuity equation at a pore scale, so as to simulate a flow through an infinite number of obstacles arranged in a regular pattern. The microscopic numerical results, thus obtained, are processed to extract the macroscopic relationship between the pressure gradient-mass flow rate. Comparing the results based on the two- and three-dimensional models, it has been found that only the three-dimensional model can capture the porous inertia effects on the pressure drop correctly. 13 refs., 6 figs.

  3. Fiscal 1998 survey report. Medical equipment (Development of fine sampling/analysis system for blood / Development of high-precision 3-D image diagnosis system / Development of low-invasion operation support system / Total development of artificial internal organ technologies); 1998 nendo chosa hokokusho. Iryo kiki (ketsuekinado biryo saishu, biryo bunseki system kaihatsu/koseido sanjigen eizo shindan system kaihatsu/teishinshu shujutsu shien system kaihatsu/jinko zoki gijutsu sogo kaihatsu)

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1999-03-01

    For efficient medical care supply systems, the R and D of advanced medical care technology and equipment largely contribute to productivity improvement for medical care services. Among them, a progress of medical care technology is becoming important for preparation of efficient and fair supply systems. MITI thus established 'Medical care and welfare equipment development project' in 1994, and has promoted the strategic long-term R and D project of medical care and welfare equipment as joint R and D project of NEDO and private enterprises. In fiscal 1998, on the development of the fine sampling/analysis system for blood, the high- precision 3-D image diagnosis system, the low-invasion operation support system, and the artificial internal organ technologies since fiscal 1996, this project clarified essential technical issues based on the future view, selected some themes to be newly developed in the future, and surveyed and evaluated the details of their R and D concretely. (NEDO)