Browsing by Issue Date, starting with "1993-12-15"

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COMPRESSIVE AND TENSILE STRAIN EFFECTS ON HOLE TUNNELING IN AN INGAAS/ALLNAS ASYMMETRICAL COUPLED-QUANTUM-WELL
(1993-12-15)
CHEN, PA
;
CHANG, CY
;
JUANG, C
;
電控工程研究所
;
Institute of Electrical and Control Engineering
Hole tunneling dynamics are investigated in a strained asymmetrical coupled quantum well (ACQW). The tunneling probabilities between heavy-hole states are calculated at different internal strains on the basis of the time-dependent Schrodinger equation analysis with the Luttinger-Kohn and an additional strain Hamiltonians. In a certain range of strain, a higher oscillation frequency (but a smaller oscillation amplitude) of hole tunneling at resonance is obtained in a biaxial tensile strain ACQW at in-plane wave vector k(parallel-to) = 0. The biaxial compressive strain is observed to lower the oscillation frequency. With a nonzero wave vector (k(parallel-to) not-equal 0), the oscillation frequency is found to be dominated by mixing effects and less dependent on the internal strain. The oscillation frequency remains roughly constant; however, the biaxial compressive strain ACQWs would still have a larger oscillation amplitude than biaxial tensile strain ACQWs.
CONDITIONAL CONVERGENCE OF PHOTOREFRACTIVE PERCEPTRON LEARNING
(1993-12-15)
HSU, KY
;
LIN, SH
;
YEH, P
;
光電工程學系
;
Department of Photonics
We consider the convergence characteristics of a perceptron learning algorithm, taking into account the decay of photorefractive holograms during the process of interconnection weight changes. As a result of the hologram erasure, the convergence of the learning process is dependent on the exposure time during the weight changes. A mathematical proof of the conditional convergence, as well as computer simulations of the photorefractive perceptrons, is presented and discussed.
THE ROLE OF DRYING-CONTROL CHEMICAL ADDITIVES ON THE PREPARATION OF SOL-GEL DERIVED PLZT THIN-FILMS
(1993-12-15)
CHANG, DA
;
CHOH, YH
;
HSIEH, WF
;
LIN, P
;
TSENG, TY
Films of Pbx/100La(x)/100(Zry/100 Tiz/100)1-x/400O3 with x = 8, y = 65 and z = 35 (PLZT(8/65/35)) with a single perovskite structural phase were successfully prepared by using drying-control chemical additives in sol-gel processing followed by rapid thermal annealing at 600-degrees-C for only 1 min on Si(Pt) substrates. The roles of the drying-control chemical additives ethylene glycol and formamide in the gel preparation were studied. The hysteresis loop of PLZT(8/65/35) thin film was measured. The remanent polarization and coercive field were found to be about 1.3 muC cm-2 and 15 kV cm-1, respectively.
MICROWAVE DIAMOND SYNTHESIS WITH HIGH OXYGEN HYDROCARBONS (CARBON-DIOXIDE, OXYGEN)
(1993-12-15)
CHEN, CF
;
CHEN, SH
;
HONG, TM
;
KO, HW
;
SHEU, SE
Our previous study demonstrated that a higher growth rate and improved crystallinity resulted from using CH4-CO(2)s in diamond deposition. The possibility of diamond synthesis using a high oxygen-containing liquid hydrocarbon, dimethyl carbonate (C3H6O3) supplemented by CO2 or 0(2) was therefore explored in the present study. Well-faceted diamond was deposited when the ratios of the respective flow rates for CO2/C3H6O3 and O-2/C3H6O3 were 6%-8% and 1.5%-2.25%. The growth rates of the diamond films, which were of high quality, were 3.6 and 1.7 mu m h(-1) respectively. The diamond films displayed different surface morphology and crystal features in these gas mixtures, i.e. the diamond film possessed more (311) and (100) facets in the O-2-C3H6O3 mixture at a power of 400 W. The diamond film deposited from 6.75% CO2 in C3H6O3 was indicated by the roughness determination not only to possess a higher growth rate but also to attain a smooth surface with a roughness of 0.048 mu m (R(a)). The surface roughness of the diamond film was 0.083 mu m for 2% O-2 in C3H6O3. The intensities of CO, OH and O produced from O-2-C3H6O3 mixtures were observed by optical emission spectroscopy measurements to be greater than those produced from CO2-C3H6O3 mixtures, but the intensities of C(2)d CH showed the opposite trend. This was the main difference between the CO2-C3H6O3 and O-2-C3H6O3 mixtures. Therefore a larger amount of etching agents appears to block the nucleation of diamond in O-2-C3H6O3 mixtures. The complete results of our study, including Raman and X-ray diffraction analyses, are presented here.
管管作品兩首
(1993-12-15)
管管
管管作品兩首
(1993-12-15)
管管
管管作品兩首
(1993-12-15)
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管管作品兩首
(1993-12-15)
管管
NOVEL FABRICATION TECHNIQUE TOWARDS QUANTUM DOTS
(1993-12-20)
LIU, DC
;
LEE, CP
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
A novel technique for semiconductor quantum dots fabrication is demonstrated. Using the technique of thermal etching or thermal evaporation during molecular beam epitaxial growth with a built-in evaporation mask, semiconductor quantum dots were obtained in a single growth run.
河川彎道動床數值模式之發展應用研究
(1994)
葉克家
;
國立交通大學土木工程研究所
蜿蜒河川可視為由不同曲率半徑反應及彎曲角度之彎道銜接直線段所組成.水流通過彎道時,由於離心力之作用而產生二次流.二次流產生後,將造成凹岸處河床之淘刷及凸岸處之淤積,因而造成凹岸之崩塌退縮以及凸岸之淤積成長.就河川治理而言,河道兩岸之穩定為其目標.故對彎道水理之了解,實為河川治理現劃上重要之工作.本研究根據現有之彎道理論,發展一套具工程實用價值之二維度動床彎道數值模式,具有推估河川彎道在工程計畫實施前後凹凸岸河床沖淤變化之情形,以及模擬在河床上設置潛板後流場之變化與沖淤改善情形等功能.此外,並藉由實例之驗證,以確定模式之實用性.
硼化鈦及碳化鈦強化氮化矽的陶瓷複合切削工具(III)
(1994)
黃肇瑞
;
Jow-LayHuang
;
國立成功大學材料工程學研究所
A FUZZY MODEL OF RIDER CONTROL FOR A MOTORCYCLE UNDERGOING LANE CHANGE
(1994)
WU, JC
;
LIU, TS
;
交大名義發表
;
機械工程學系
;
National Chiao Tung University
A rider-motorcycle system can be treated as a representative man-machine system in view of the major role that both the rider and the motorcycle play in determining the performance of the integrated system. Of interest in this work is the handling property which is crucial to safety during riding. In this study, al mathematical model of three-dimensional multi-body dynamics is constructed, which accounts for not only motorcycle dynamics but also the rider's posture change. Since a fuzzy controller is essentially a nonlinear process representing the qualitative knowledge of human experts on the behaviour of systems and desired control actions, a fuzzy control method is applied to determine a rider's handling action. The fuzzy controller based on fuzzy rules and fuzzy reasoning methods plays the role of the rider in a rider-motorcycle system. Accordingly, a rider-motorcycle system undergoing lane change is simulated. The time variation of steering angle, yaw rate, and lateral acceleration are demonstrated. Effects of yaw rate and lateral acceleration on handling property are examined-based on Bode plots.
利用模糊控制理論來強化堆疊類神經網路取用能力之研究
(1994)
游寶達
;
Yu, Pao-Ta
;
國立中正大學資訊工程研究所
主動脈與腎動脈血流波之測量及分析
(1994)
王唯工
;
中央研究院物理研究所
以電流傳輸元件所設計之萬用電流濾波電路之改良
(1994)
張俊明
;
CHANG CHUN-MING
;
私立中原大學電機工程學系
新竹交通大學圖書資訊廣場景觀工程規劃案（1994-1996）
(1994)
不詳
圖為〔緣慧潤生〕小件不銹鋼模型。
染整特用化學品之合成及其應用---(I) 染色助劑起泡性之改善
(1994)
陳耿明
;
CHEN KENG-MING
;
國立台灣工業技術學院纖維工程技
動態雷達影像品質提昇計劃---子計畫一：高解析度影像雷達信號處理
(1994)
馬杰
;
MAR JEICH
;
私立元智工學院電機工程學系
超大型油輪艉流場解析與船形設計能力建立之研究---總計畫(II)
(1994)
黃正利
;
Huang,Zheng-Li
;
國立台灣大學造船工程學研究所
ADAPTIVE VOLTERRA-DFE AND TIMING RECOVERY IN DIGITAL MAGNETIC RECORDING SYSTEM
(1994)
LIN, JY
;
WEI, CH
;
電控工程研究所
;
Institute of Electrical and Control Engineering