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World Journal of Clinical Cases 2022年第20期10卷 7020-7028页

作者： Junya Tsunoda tomohiko nishi Takafumi Ito Gaku Inaguma tomohiko Matsuzaki Hiroaki Seki Nobutaka Yasui Michio Sakata Akihiko Shimada Hidetoshi Matsumoto Department of Surgery Keiyu HospitalYokohama 220-8521Japan Department of Internal Medicine Keiyu HospitalYokohama 220-8521Japan

BACKGROUND Radiofrequency ablation(RFA)is an effective treatment for early-stage hepatocellular carcinoma(HCC).Although RFA is a relatively safe technique compared with surgery,several complications have been reported to be following/accompanying this *** diaphragmatic hernia caused by RFA is rare;however,the best surgical approach for its treatment is *** present a case of laparoscopic repair of diaphragmatic hernia due to *** SUMMARY An 80-year-old woman with segment VIII HCC was treated twice in 5 years with RFA;28 mo after the second RFA,the patient complained of right hypochondriac *** tomography revealed that the small intestine was incarcerated in the right *** patient was diagnosed with diaphragmatic hernia and underwent laparoscopic repair by non-absorbable running *** patient’s postoperative course was favorable,and the patient was discharged on postoperative day *** diaphragmatic hernia has not recurred 24 mo after *** Laparoscopic treatment of iatrogenic diaphragmatic hernia is effective and minimally invasive.

关键词： Diaphragmatic hernia Radiofrequency ablation Hepatocellular carcinoma Complication Laparoscopic surgery Case report

A novel shaft-less double suction mini pump

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Science China(Technological Sciences) 2010年第1期53卷 105-110页

作者： nishi Michihiro Kyushu Institute of Technology Sensui-cho 1TobataKitakyushu 804-8550Japan

A novel double suction shaft-less mini pump was developed for heat control of small energy systems in this *** mini pump impeller with an exit diameter of 40 mm was combined with the motor rotor supported by the hybrid dynamic *** specific speed of the pump was 125 min-1 m3 min-1 *** hydraulic performance of the pump was investigated experimen-tally under four rotational *** the test results,it was recognized that the pump could provide a flow discharge of 5 L/min and head of 1.5 m,which are applicable for the heat control system of a 3 kW fuel cell.A three-dimensional turbulent flow simulation in the pump was also conducted near the design *** numerical results showed that the average hydraulic performance of the mini pump was predicted *** the internal flow simulation,it was revealed that the favorable inflow condition upstream of impeller inlet could be attained by applying the double suction shaft-less design for the mini pump.

关键词： double suction seal-less shaft-less uniform inflow mini pump

ELASTOMERIC SEISMIC-PROTECTION ISOLATORS FOR BUILDINGS AND BRIDGES

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Chinese Journal of Polymer Science 2013年第1期31卷 50-57页

作者： Toshio nishi Nobuo Murota International Division Tokyo Institute of Technology Department of Seismic Isolation &Vibration Control Development

A giant earthquake of magnitude 9.0 occurred in Pacific Ocean off of Tohoku District Japan on March 11,2011. The highest seismic intensity of 7 in JMA scale was recorded in Miyagi. In the Tohoku district, around 230 buildings are seismically isolated （hereafter, SI） mainly by elastomeric isolators （seismic rubber bearings）. According to the official survey reports by several organizations （for example）, the records of those buildings have verified the effectiveness of the seismic isolation. The response acceleration of the SI buildings was reduced by 30% to 50% of the input ground acceleration. Additionally, the difference of the conditions inside the room between SI and the fixed-base buildings was obvious as well as the damage in main structures of the buildings. The displacements of the isolators by the earthquake were around 200 mm according to the records of the instruments. As a result, the performance of SI buildings and the elastomeric isolators in the Tohoku District -- Off the Pacific Ocean Earthquake 2011 were excellent, and the efficiency of the seismic isolation was verified by the records of many buildings in wide area.

关键词： Elastomeric isolator Seismic isolation Rubber bearing.

Study on Performance and Flow Field of an Undershot Cross-Flow Water Turbine Comprising Different Number of Blades

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Journal of Thermal Science 2017年第5期26卷 413-430页

作者： Yasuyuki nishi Kentaro Hatano Terumi Inagaki Department of Mechanical Engineering Ibaraki University 4-12-1 Nakanarusawa-cho Hitachi-shi Ibaraki 316-8511JAPAN Graduate School of Science and Engineering Ibaraki University 4-12-1 Nakanarusawa-cho Hitachi-shi Ibaraki316-8511 JAPAN

Recently, small hydroelectric generators have gained attention as a further development in water turbine technology for ultra low head drops in open channels. The authors have evaluated the application of cross-flow water turbines in open channels as an undershot type after removing the casings and guide vanes to substantially simplify these water turbines. However, because undershot cross-flow water turbines are designed on the basis of cross-flow water turbine runners used in typical pipelines, it remains unclear whether the number of blades has an effect on the performance or flow fields. Thus, in this research, experiments and numerical analyses are employed to study the performance and flow fields of undershot cross-flow water turbines with varying number of blades. The findings show that the turbine output and torque are lower, the fluctuation is significantly higher, and the turbine efficiency is higher for runners with 8 blades as opposed to those with 24 blades.

关键词： Water Turbine Cross-Flow Turbine Free Surface Performance Flow Field Number of Blades

Study on the Rotor Design Method for a Small Propeller-Type Wind Turbine

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Journal of Thermal Science 2016年第4期25卷 355-362页

作者： Yasuyuki nishi Yusuke Yamashita Terumi Inagaki Department of Mechanical Engineering Ibaraki University Graduate School of Science and Engineering Ibaraki University

Small propeller-type wind turbines have a low Reynolds number,limiting the number of usable airfoil ***,their design method is not sufBciently established,and their performance is often *** ultimate goal of this research is to establish high-performance design guidelines and design methods for small propeller-type wind *** that end,we designed two rotors:Rotor A,based on the rotor optimum design method from the blade element momentum theory,and Rotor B,in which the chord length of the tip is extended and the chord length distribution is *** examined performance characteristics and flow fields of the two rotors through wind tunnel experiments and numerical *** results revealed that the maximum output tip speed ratio of Rotor B shifted lower than that of Rotor A,but the maximum output coefficient increased by approximately 38.7%.Rotors A and B experienced a large-scale separation on the hub side,which extended to the mean in Rotor *** difference in separation had an impact on the significant decrease in Rotor A's output compared to the design value and the increase in Rotor B's output compared to Rotor A.

关键词： Wind Turbine Propeller-Type Horizontal Axis Blade Element Momentum Theory Rotor Design Method

STRUCTURE AND DYNAMICS OF POLYMERIC MATERIALS IN NANO-SCALE

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Chinese Journal of Polymer Science 2011年第1期29卷 43-52页

作者： Toshio nishi So Fujinami Ken Nakajima WPI Advanced Institute for Materials Research Tohoku University

The nano-palpation technique, i.e., nanometer-scale elastic and viscoelastic measurements based on atomic force microscope, is introduced. It is demonstrated to be very useful in analyzing nanometer-scale materials properties for the surfaces and interfaces of various types of soft materials. It enables us to obtain not only structural information but also mechanical information about a material at the same place and at the same time.

关键词： Nano-palpation Atomic force microscope Soft material Young's modulus Viscoelasticity.

NUMERICAL STUDY OF FLOW IN CONICAL DIFFUSER WITH VORTEX GENERATOR JETS

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Chinese Journal of Mechanical Engineering 2007年第1期20卷 5-9页

作者： LIU Xiaomin nishi Michihiro School of Energy and Power Engineering Xi＇ an Jiaotong University xi’an 710049 China Mechanical Engineering Department Kyushu Institute of Technology Kitakyushu 804-8550 Japan

To develop vortex generator jet （VGJ） method for flow control, the turbulence flow in a 14° conical diffuser with and without vortex generator jets are simulated by solving Navier-Stokes equations with k-ε turbulence model. The diffuser performance, based on different velocity ratio （ratio of the jet speed to the mainstream velocity）, is investigated and compared with the experimental study. On the basis of the flow characteristics using computation fluid dynamics （CFD） method observed in the conical diffuser and the downstream development of the longitudinal vortices, attempt is made to correlate the pressure recovery coefficient with the behavior of vortices produced by vortex generator jets.

关键词： Vortex generator jet (VGJ) Flow control Longitudinal vortex Numerical simulation

Approach to reducing the effect of bone-coal power station on radiation environment

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Nuclear Science and Techniques 2002年第4期13卷 264-269页

作者： nishi－Ying GUPei－Long 等 StateEnvironmentalProtectionAdministrationRadiationEnvironmentalMonitoringTechnicalCenter Hangzhou310012 StateEnvironmentalProtectionAdministrationRadiationEnvironmentalMonitoringTech

The effect of two bone-coal power stations(6MWe) on environment was investigated within the scope of the dose contribution caused by various radionucildes in different *** is found that the best measures to reduce the effect of bone-coal power station on radiation environment include to select a fine boiler system and a comprehensive utilization of the bone-coal cinder(BCC),soot and ash in the catchers.

关键词：天然燃料骨炭粉末站辐射环境

An experimental study on self-output-control characteristics of micro downwind rotor with coning soft blades

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Science China(Technological Sciences) 2010年第1期53卷 100-104页

作者： EGUCHI Hidenori YOSHIDA Kouichi nishi Michihiro Sophia Engineering CO. Ltd.Kikugaoka 1-15-25KokuraminamiKitakyushu 802-0981Japan Mechanical Engineering Department Kyushu Institute of TechnologySensui-cho 1TobataKitakyushu 804-8550Japan Senior Academy Kyushu Institute of TechnologySensui-cho 1TobataKitakyushu 804-8550Japan

In this short paper,we have treated the aerodynamic performance of micro downwind rotor with coning soft blades *** test wind rotor has the tip diameter of 1.5 m and three two-dimensional NACA0018 blades of 0.15 m chord whose material is light,soft and pliable foam plastic for perfect *** the wind tunnel test,it is realized that the performance is manageable by the coning angle of the rotor *** the present case,an improvement of the performance in lower wind speeds is achieved by using the coning blade of 20°.Besides,owing to the torsional deformation of very soft blade,the self-power control characteristic is observed in every test rotor regardless of coning angle in the range of 0°-20° under the wind speed less than 12 m/s.

关键词： micro wind turbine downwind self-output-control coning angle soft blade aerodynamic performance

Study on an Undershot Cross-Flow Water Turbine

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Journal of Thermal Science 2014年第3期23卷 239-245页

作者： Yasuyuki nishi Terumi Inagaki Yanrong Li Ryota Omiya Junichiro Fukutomi Department of Mechanical Engineering Ibaraki University 4-12-1 Nakanarusawa-choHitachi-shi Ibaraki 316-8511JAPAN Graduate School of Science and Engineering Ibaraki University 4-12-1 Nakanarusawa-choHitachi-shi Ibaraki316-8511JAPAN Institute of Technology and Science The University of Tokushima 2-1 Minamijosanjima-cho Tokushima-shiTokushima 770-8506 JAPAN

This study aims to develop a water turbine suitable for ultra-low heads in open channels, with the end goal being the effective utilization of unutilized hydroelectric energy in agricultural water channels. We performed tests by applying a cross-flow runner to an open channel as an undershot water turbine while attempting to simplify the structure and eliminate the casing. We experimentally investigated the flow fields and performance of water tur- bines in states where the flow rate was constant for the undershot cross-flow water turbine mentioned above. In addition, we compared existing undershot water turbines with our undershot cross-flow water turbine after at- taching a bottom plate to the runner. From the results, we were able to clarify the following. Although the effec- tive head for cross-flow runners with no bottom plate was lower than those found in existing runners equipped with a bottom plate, the power output is greater in the high rotational speed range because of the high turbine ef- ficiency. Also, the runner with no bottom plate differed from rtmners that had a bottom plate in that no water was being wound up by the blades or retained between the blades, and the former received twice the flow due to the flow-through effect. As a result, the turbine efficiency was greater for runners with no bottom plate in the full ro- tational speed range compared with that found in runners that had a bottom plate.

关键词： Water Turbine Cross-Flow Turbine Open Channel Performance Flow Visualization