Browsing by Issue Date, starting with "1995-09-20"

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管管作品三首
(1995-09-20)
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管管作品三首
(1995-09-20)
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管管作品三首
(1995-09-20)
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管管作品三首
(1995-09-20)
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管管作品三首
(1995-09-20)
管管
管管作品三首
(1995-09-20)
管管
STUDY ON THE REACTION-MECHANISM OF THE BASE-CATALYZED INTRAMOLECULAR DIELS-ALDER REACTION OF FURFURYL PROPARGYL ETHERS
(1995-09-22)
WU, HJ
;
YING, FH
;
SHAO, WD
;
應用化學系
;
Department of Applied Chemistry
STUDY ON THE REACTION-MECHANISM OF THE BASE-CATALYZED INTRAMOLECULAR DIELS-ALDER REACTION OF FURFURYL PROPARGYL ETHERS
(1995-09-22)
WU, HJ
;
YING, FH
;
SHAO, WD
;
交大名義發表
;
應用化學系
ALGORITHMS FOR THE RURAL POSTMAN PROBLEM
(1995-10-01)
PEARN, WL
;
WU, TC
;
工業工程與管理學系
;
Department of Industrial Engineering and Management
The rural postman problem (RPP) is a practical extension of the well-known Chinese postman problem (CPP), in which a subset of the edges (streets) from the road network are required to be traversed at a minimal cost. The RPP is NP-complete if this subset does not form a weakly connected network. Therefore, it is unlikely that polynomial-time bounded algorithms exist for the problem. In this paper, we review the existing heuristic solution procedures, then present two new algorithms to solve the problem near-optimally. Computational results showed that the proposed new algorithms significantly outperformed the existing solution procedures.
SUB-POISSON PHOTOELECTRON STATISTICS IN SATURATED LIGHT-ABSORPTION
(1995-10-01)
MENG, HF
;
物理研究所
;
Institute of Physics
We show that sub-Poisson photoelectrons can result from the finite relaxation time of the fundamental photoelectron-emitting entities, which could be individual atoms, or valence-band electrons, etc., depending on the type of the detectors. After identifying the precise quantum-mechanical criterion for a light without the intrinsic antibunching property, it is demonstrated that the variance to mean ratio of photoelectron counts within a fixed time period can be reduced to as small as 1/2, even for such light. The condition for strong fluctuation reduction is found to be the saturation of light absorption. Semiconductor photodetectors are considered in relative details, and their photoelectron statistics are expressed in terms of the intrinsic material parameters.
EFFECTS OF DRY-ETCHING DAMAGE REMOVAL ON LOW-TEMPERATURE SILICON SELECTIVE EPITAXIAL-GROWTH
(1995-10-01)
TSENG, HC
;
CHANG, CY
;
PAN, FM
;
CHEN, LP
;
電子工程學系及電子研究所
The epitaxial silicon layer selectively grown on the reactive ion etched (RIE) silicon substrate using CF4, CHF3 and Ar etching gases has been studied. Defects and contaminants induced by the RIE process result in a rough epilayer, and degrade the current-voltage (I-V) characteristics. An interfacial carbide layer is present between the epilayer and the RIE treated substrate. Using an efficient and convenient after-etching treatment with a CF4/O-2 low-energy plasma, we obtain a clean Si surface in the patterned oxide windows for selective epitaxial growth, and the electrical characteristics are significantly improved. (C) 1995 American Institute of Physics.
PRECLASSIFICATION OF HANDWRITTEN CHINESE CHARACTERS BASED ON BASIC STROKE SUBSTRUCTURES
(1995-10-01)
CHENG, RH
;
LEE, CW
;
CHEN, Z
;
資訊科學與工程研究所
;
Institute of Computer Science and Engineering
A method for preclassification of handwritten Chinese characters is presented. A set of basic stroke substructures is defined using the consistent stroke connection relations. A knowledge guided recognition process is employed to identify the types of the extracted basic stroke substructures found in a handwritten character. Then a 1-D character coding scheme is given to represent the character and the code can be also used for character preclassification.
A MODEL FOR PREDICTING PERFORMANCE OF AN ANNULAR DENUDER SYSTEM
(1995-10-01)
LU, CY
;
BAI, HL
;
LIN, YM
;
環境工程研究所
;
Institute of Environmental Engineering
A mathematical model for simultaneous gas diffusion, aerosol diffusion and evaporation is presented to predict performance of the annular denuder system. Approximating the aerosol size distribution by a lognormal function and using the statistical method of moment, the evolution of the three aerosol moments and the mass balance equations for the two associated gases in the annular denuder system are obtained. The governing equations were cast into dimensionless form and the performance of the model was validated by the existing data available in the literature. The effects of governing dimensionless groups on the model performance were evaluated in the sensitivity analysis. The model was then applied for sampling nitric acid gas using a typical range of atmospheric aerosol and gas properties to derive the performance equation of the annular denuder system. The methodologies presented herein are helpful in providing design and operational criteria of the annular denuder system for a real sampling of atmospheric reactive gases that minimizes measurement artifacts.
A NOVEL PLANARIZATION OF TRENCH ISOLATION USING POLYSILICON REFILL AND ETCHBACK OF CHEMICAL-MECHANICAL POLISH
(1995-10-01)
CHENG, JY
;
LEI, TF
;
CHAO, TS
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
The planarization of trench isolation refilled by deposition oi polysilicon was investigated. Results show that the planarization by RIE etching has poor surface planarity. On the other hand, an excellent surface planarity can be achieved by the CMP process resulting from the high etching selectivity of polysilicon to nitride. This simple process provides a very promising candidate for trench isolation.
A NOVEL PLANARIZATION OF TRENCH ISOLATION USING POLYSILICON REFILL AND ETCHBACK OF CHEMICAL-MECHANICAL POLISH
(1995-10-01)
CHENG, JY
;
LEI, TF
;
CHAO, TS
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
The planarization of trench isolation refilled by deposition oi polysilicon was investigated. Results show that the planarization by RIE etching has poor surface planarity. On the other hand, an excellent surface planarity can be achieved by the CMP process resulting from the high etching selectivity of polysilicon to nitride. This simple process provides a very promising candidate for trench isolation.
CONVERGENCE-RATES OF ITERATIVE SOLUTIONS OF ALGEBRAIC MATRIX RICCATI-EQUATIONS
(1995-10-01)
JUANG, J
;
NELSON, P
;
應用數學系
;
Department of Applied Mathematics
We consider the iterative solutions of a certain class of algebraic matrix Riccati equations with two parameters, c(0 less than or equal to c less than or equal to 1) and alpha(0 less than or equal to alpha less than or equal to 1). Here c denotes the fraction of scattering per collision and alpha is an angular shift. Equations of this class are induced via invariant imbedding and the shifted Gauss-Lengendre quadrature formula from a ''simple transport model.'' The purpose of this paper is to describe the effects of the parameters c, alpha, and N (the dimension of the matrix) on the convergence rates of the iterative solutions. We also compare the convergence rates of those iterative methods.
CLUSTERING APPROACH TO GROUPING OBJECTS IN MESSAGE-PASSING SYSTEMS
(1995-10-01)
CHANG, WT
;
TSENG, CC
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資訊工程學系
;
Department of Computer Science
Grouping related objects into processing nodes is one of the cost-effective solutions in distributed OOP. The authors propose a hierarchical clustering grouping strategy to minimize the cost of invocations on a given class hierarchy in a distributed manner.
LASER-DIODE-BASED OPTOELECTRONIC SUBHARMONIC PHASE-LOCKED LOOP
(1995-10-01)
LIN, GR
;
YANG, CR
;
PAN, CL
;
交大名義發表
;
光電工程學系
An optoelectronic technique for synthesis of frequency-versatile electrical signals phase-locked to the optical clock is proposed. The key component is an integrated-optic modulator (IOM) operated in the nonlinear regime. With a photodetctor, the IOM functions as an optoelectronic subharmonic mixer for intermixing microwave signals that are subharmonics of the optical clock, As a first demonstration, phase-locked subharmonics and fractional harmonics of the optical clock at f(o) = 500 MHz, with frequency equal to f(o)/n or (m/n)f(o), where n = 2,3,4... and m/n = 2/5,2/3,4/3,3/2 and 5/3 etc;, are generated and characterized.
THE REVERSIBILITY OF 6 GEOMETRIC COLOR SPACES
(1995-10-01)
SHIH, TY
;
交大名義發表
;
土木工程學系
;
National Chiao Tung University
;
Department of Civil Engineering
Color coordinate systems provide a way to address, to describe, and to manipulate colors. in the field of image processing and computer graphics, several color models in common use include RGB, HVC, HSV HLS, and ISH. In this study, the reversibility of several color coordinate systems and their numerical characteristics are studied. All these models are classified as user-oriented and related to the perceptual color space.
CONTROLLING FLUORINE CONCENTRATION AND THERMAL ANNEALING EFFECT ON LIQUID-PHASE DEPOSITED SIO2-XFX FILMS
(1995-10-01)
YEH, CF
;
CHEN, CL
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
Silicon oxide (SiO2-xFx) with fluorine naturally incorporated can be prepared by the liquid-phase deposition (LPD) method at 15 degrees C. The fluorine is uniformly distributed in the bulk of the LPD oxide. The fluorine incorporation as well as the qualitative properties can be accurately controlled by varying the amount of H2O added. A high temperature process has considerable effect on the low temperature fluorinated oxide. FTIR and XPS spectra show that Si-F and SiO-H bonds can restructure with densification at higher thermal annealing temperature, and that restructuring is a function of temperature. Film densification with increasing temperature is also discussed in terms of Si-O-Si bond angle and Si-Si bond length.