Search Results:　 1-20 of 860

1

22pPSB-17 Transient phenomena in globally coupled oscillators [in Japanese]

Kabutoya Rina , Kori Hiroshi , Sato Yuzuru , Shima Shin-ichiro , Toda Mikito

Meeting abstracts of the Physical Society of Japan 66(2-2), 251, 2011-08-24

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2

Femtosecond electron deflectometry for measuring transient fields generated by laser-accelerated fast electrons

Inoue Shunsuke , Tokita Shigeki , Otani Kazuto , Hashida Masaki , Sakabe Shuji

… The results of this study demonstrate the potential of electron deflectometry for measuring ultrafast phenomena in the femtosecond time domain. …

Applied Physics Letters 99(3), 2011-07

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3

Relation between instantaneous electric power and propagated phase difference on coupled van der Pol oscillators as a ladder [in Japanese]

NIIMI Kosuke , KUNIHIRO Seiko , ABURATANI Hitoshi , YAMAUCHI Masayuki

自然界において、数多くの同期現象がみられる。これらは、電気回路でもみられ、工業的にも利用がなされている。我々は、発振器の結合系において、梯子状や環状、格子状と様々な結合状態から、定常状態で隣接した発振器間の位相状態が、同相同期から逆相同期へ、または逆相同期から同相同期へ切り替わり続ける現象を発見し、位相反転波動と呼び観測、及び解析を行ってきた。また、これら位相反転波動に至る過度状態の現象として、位 …

IEICE technical report. Nonlinear problems 111(106), 95-100, 2011-06-23

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4

Transient and Unsteady behavior of a Radial-Inflow Turbine for Automotive Turbocharger(<Special Issue>Unsteady Phenomena of Heat and Fluid Flow) [in Japanese]

YAMAGATA Akihiro

Journal of the Gas Turbine Society of Japan 39(2), 98-105, 2011-03-20

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5

FDTD Simulation of Transfer Impedance of Calibration Current Target for ESD Testing [in Japanese]

GOTOH Tsuyoshi , TAKA Yoshinori , MORI Ikuko , FUJIWARA Osamu , ISHIGAMI Shinobu , YAMANAKA Yukio

… Transient electromagnetic fields caused by electrostatic discharges (ESDs) are known to cause a serious failure in high-tech information devices. … As a result, we found that the target has a transfer impedance of almost 1-j0 Ω at less than a few hundred MHz, though it has resonance phenomena around 2-3 GHz, which was validated by measuring scattering parameters of the target through a transmission line with a network analyzer. …

IEEJ Transactions on Electronics, Information and Systems 131(3), 606-612, 2011-03-01

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6

Simultaneous Three-dimensional Analysis of Gas-Solid Flow in Blast Furnace by Combining Discrete Element Method and Computational Fluid Dynamics

NATSUI Shungo , NOGAMI Hiroshi , UEDA Shigeru , KANO Junya , INOUE Ryo , ARIYAMA Tatsuro

… Under these conditions, detailed information on in-furnace phenomena is required to attain stable operation.In the present study, a combination model using the discrete element method and computational fluid dynamics (DEM-CFD) was introduced to understand the fully three-dimensional in-furnace phenomena in the whole blast furnace. …

ISIJ International 51(1), 41-50, 2011-01-15

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7

Two-Dimensional Analysis of Backside-Electrode and Gate-Field-Plate Effects on Buffer-Related Current Collapse in AlGaN/GaN HEMTs [in Japanese]

ONODERA Hiraku , NAKAJIMA Atsushi , HORIO Kazushige

バッファ層中に深いドナーと深いアクセプタを考慮したAlGaN/GaN HEMTの2次元過渡解析を行い,ゲートフィールドプレートの導入や裏面電極の付加がバッファ層に起因したラグ現象や電流コラプスに与える影響について調べた.その結果,アクセプタ濃度が高い場合,ゲートフィールドプレートの導入がラグ現象や電流コラプスの低減に効果的であることが示された.一方,アクセプタ濃度が比較的低い場合には裏面電極の存在 …

IEICE technical report. Microwaves 110(359), 45-50, 2011-01-06

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8

Two-Dimensional Analysis of Backside-Electrode and Gate-Field-Plate Effects on Buffer-Related Current Collapse in AlGaN/GaN HEMTs [in Japanese]

ONODERA Hiraku , NAKAJIMA Atsushi , HORIO Kazushige

バッファ層中に深いドナーと深いアクセプタを考慮したAlGaN/GaN HEMTの2次元過渡解析を行い,ゲートフィールドプレートの導入や裏面電極の付加がバッファ層に起因したラグ現象や電流コラプスに与える影響について調べた.その結果,アクセプタ濃度が高い場合,ゲートフィールドプレートの導入がラグ現象や電流コラプスの低減に効果的であることが示された.一方,アクセプタ濃度が比較的低い場合には裏面電極の存在 …

IEICE technical report. Electron devices 110(358), 45-50, 2011-01-06

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9

Influence of Reactance Saturation of Large Turbine Generator in Transient Phenomena [in Japanese]

HIRAMATSU Daisuke , UEMURA Yoichi , TSUJIKAWA Kazuma , KOBAYASHI Masashi , KAKIUCHI Mikio , NAGAKURA Ken , HOSAKA Hitoshi , UEDA Takashi , OTAKA Toru

The authors have been studying characteristics of equivalent circuit model. The authors paid attention to the flux saturation influence of large turbine generator. Now the authors examined the various …

IEEJ Transactions on Power and Energy 131(1), 20-28, 2011-01-01

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10

Insulation coordination and EMC technologies for low-voltage and control circuits at power stations and substations [in Japanese]

発変電設備の低圧制御回路における絶縁協調EMC調査専門委員会

電気学会技術報告 (1234), 1-60,裏表紙, 2011-09
11

Analysis of Residual Vibrations beyond the Nyquist Frequency in Sampled-Data Positioning Control System

ATSUMI Takenori , MESSNER William C.

… To address this problem, we analyzed residual vibrations using a shock response spectrum (SRS) analysis employed for characterizing transient characteristics of mechanical resonances. … These phenomena were confirmed through experiments using the actual head-positioning system of the hard disk drive. …

Journal of System Design and Dynamics 5(7), 1444-1459, 2011

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12

Design Method of Servo Control System Using Notch-Filter for Flexible Arm and Its Applications

Mori Takahiko

… In order to reduce the sensor costs and to suppress spillover phenomena which are caused by ignored elastic modes of the plant, we introduce a pre-filter into an input which possesses characteristics of notch filter. … As a result, it enables to solve trade-off problem between suppression and transient. …

IEEJ Transactions on Electronics, Information and Systems 131(11), 1990-1999, 2011

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13

Transient Response of Viscoelastic Concentrated Suspensions After Reversal in Large Amplitude Oscillatory Shear Flow

Yoshida Ayumi , Narumi Takatsune

… Transient responses in shear rate and strain after each shear reversal were examined under sinusoidal stresses applied. … The viscoelastic suspensions have showed similar transient responses with fluidity increase to those observed with Newtonian carrier liquids. … Such kind of historical effects of viscoelasticity increased the fluidity at the first stage in the transient period and finished the whole transient phenomena with smaller strains. …

Nihon Reoroji Gakkaishi(Journal of the Society of Rheology, Japan) 39(4), 173-180, 2011

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14

Improvement of Transient Voltage Responses using an Additional PID-loop on ANFIS-based Composite Controller-SVC (CC-SVC) to Control Chaos and Voltage Collapse in Power Systems

Ginarsa I Made , Soeprijanto Adi , Purnomo Mauridhi Hery , Syafaruddin , Hiyama Takashi

… These phenomena are deeply explored using both detailed and approximate models in this paper. … The ANFIS-based CC-SVC with an additional PID-loop was proposed to control these problems and to improve transient response of the detailed model. … The main function of the PID-loop was to increase the minimum voltage and to decrease the settling time at transient response. …

IEEJ Transactions on Power and Energy 131(10), 836-848, 2011

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15

Ultra Fast Response AC-Coupled Burst-Mode Receiver with High Sensitivity and Wide Dynamic Range for 10G-EPON System

HARA Kazutaka , KIMURA Shunji , NAKAMURA Hirotaka , YOSHIMOTO Naoto , HADAMA Hisaya

A 10-Gbit/s-class ac-coupled average-detection-type burst-mode receiver (B-Rx) with an ultra fast response and a high tolerance to the long consecutive identical digits has been developed. Key feature …

IEICE Transactions on Communications E94.B(7), 1845-1852, 2011

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16

Theoretical Model of Homogeneous Nucleation Generation to Quench with Jet Impingement

MONDE Masanori , HASAN Mohammad Nasim , MITSUTAKE Yuichi

… In this model, a characteristic liquid cluster at the boundary is considered and the condition of homogeneous nucleation generation is characterized at a moment when the average temperature in the liquid cluster reaches the condition of ∂Tavg/∂t = 0, that is energy consumption due to bubble nucleation and subsequent growth balances transient external energy deposition, at which bubble generation and growth in the cluster cause the liquid sensible energy to decrease. …

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 77(776), 1158-1164, 2011

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17

Real-Scale Numerical Simulation of Gas Entrainment Phenomena in Fast Reactor

ITO Kei , KUNUGI Tomoaki , OHSHIMA Hiroyuki , KAWAMURA Takumi

… To evaluate gas entrainment (GE) phenomena in a large-scale sodium-cooled fast reactor, the authors are developing a high-precision numerical simulation algorithm for gas-liquid two-phase flows based on a volume-of-fluid methodology. … Thanks to these improvements, it is confirmed that the developed simulation algorithm can reproduce the GE phenomena in a simple experiment. …

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B 77(776), 978-981, 2011

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18

Adsorption and Desorption Simulation of Carbon Canister Using n-Butane as Model Compound of Gasoline

Sato Kazunari , Kobayashi Noriyuki

自動車の燃料タンクから排出される蒸散燃料ガスには人体に有害な物質が含まれており，法規制により排出が厳しく制限されている。大気中への蒸散ガス放出（破過）を防止する装置であるカーボンキャニスターは，内部の活性炭充填層でガスを吸着することでタンクからの排出を抑制する。本研究では，自動車から排出される蒸発燃料ガスの主成分であるn-ブタンと活性炭の吸脱着・拡散現象を実験と数値計算から明確にして，活性炭層内で …

Journal of the Japan Petroleum Institute 54(3), 136-145, 2011

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19

Finite Element Implementation of an Elastoplastic Constitutive Equation in the Presence of Hydrogen

LIU Lijun , MIRESMAEILI Reza , OGINO Masao , KANAYAMA Hiroshi

… To model the local phenomena associated with hydrogen, the local flow stress is considered decreasing with the increasing of hydrogen concentration. … We then combine the ADVENTURE-Solid with an in-house advection diffusion finite element program, to analyze a transient hydrogen diffusion-elastoplastic coupling problem ahead of a crack tip. …

Journal of Computational Science and Technology 5(1), 62-76, 2011

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20

Theoretical Model of Nanoparticle Detection Mechanism in Microchannel with Gating Probe Electrodes

DOI Kentaro , UEDA Masahiro , KAWANO Satoyuki

… However, details of electro-fluid dynamics phenomena remain to be clarified. … In the present study, a theoretical model is developed to explain the mechanism of the detection of charged metallic particles using gating nanoelectrodes, focusing on electric transient responses observed experimentally. …

Journal of Computational Science and Technology 5(2), 78-88, 2011

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