Browsing by Issue Date, starting with "1995-02-16"

Now showing 1 - 20 of 87051

SPEAKER-INDEPENDENT MANDARINE PLOSIVE RECOGNITION WITH DYNAMIC FEATURES AND MULTILAYER PERCEPTRONS
(1995-02-16)
CHEN, WY
;
CHEN, SH
;
交大名義發表
;
電信工程研究所
;
National Chiao Tung University
A new method for recognising plosives in isolated Mandarin syllables is discussed in the Letter. After automatically detecting the plosive segment of the input utterance, some dynamic features are extracted from its spectral parameter contours using orthonormal polynomial transforms. Next, an MLP trained with an algorithm based on a minimum error criterion is employed to distinguish plosives using these features. A promising recognition rare of 73.6% is achieved in a speaker-independent test using a database containing utterances of 110 syllables uttered by 100 speakers.
INHIBITION OF BIRDS BEAK IN LOCOS BY NEW BUFFER N2O OXIDE
(1995-02-16)
CHAO, TS
;
CHENG, JY
;
LEI, TF
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
In the Letter new N2O buffer oxide was used to replace the conventional dry oxide for LOGOS isolation. This new structure can result in a shorter bird's beak than the conventional structure without adding extra steps and inducing the defect in silicon substrate.
BOND-STRUCTURE CHANGES OF LIQUID-PHASE DEPOSITED OXIDE (SIO2-XFX) ON N2 ANNEALING
(1995-02-20)
YEH, CF
;
CHEN, CL
;
LUR, W
;
YEN, PW
;
電子工程學系及電子研究所
共創一個和諧感通的的社會(上)
(1995-02-20)
周昭翡
共創一個和諧感通的的社會(下)
(1995-02-21)
周昭翡
POLYURETHANES SYNTHESIZED FROM POLYESTER POLYOLS DERIVED FROM PET WASTE .3. MECHANICAL-PROPERTIES
(1995-02-22)
LEE, SC
;
SZE, YW
;
LIN, CC
;
交大名義發表
;
材料科學與工程學系
SYNTHESIS OF SIDE-CHAIN LIQUID-CRYSTALLINE POLYOXETANES CONTAINING 4-(ALKANYLOXY)PHENYL TRANS-4-ALKYLCYCLOHEXANOATE SIDE-GROUPS
(1995-02-27)
LU, YH
;
HSU, CS
;
應用化學系
;
Department of Applied Chemistry
The synthesis of side-chain liquid crystalline polyoxetanes containing 4-(alkanyloxy)phenyl trans-4-alkylcyclohexanoate side groups is presented. Differential scanning calorimetry, optical polarizing microscopy, and X-ray diffraction measurements reveal polymorphism of mesophases for all obtained polymers. Both spacer length and terminal alkyl length have a profound influence on the nature and thermal stability of the mesophases. Although the polyoxetane backbone is more flexible than the polymethacrylate backbone, side-chain crystallization did not occur for any of the synthesized polymers.
FINITE MATRIX COMPUTATIONS APPLIED TO THE SCATTERING OF A WAVEPACKET IN THE COULOMB POTENTIAL
(1995-02-28)
PEN, UL
;
JIANG, TF
;
物理研究所
;
Institute of Physics
We develop a finite dimensional matrix method to treat wavepacket propagation in potential scattering problems. The method is useful for general quantum mechanical problems. The scattering dynamics of a minimum uncertainty wavepacket in the Coulomb potential is presented.
LIQUID-PHASE BONDING OF YTTRIA-STABILIZED ZIRCONIA WITH CAO-TIO2-SIO2 GLASS
(1995-03-01)
CHIOU, BS
;
YOUNG, CD
;
DUH, JG
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
A 36.8wt % CaO-26.2 wt % TiO2-37.0 wt % SiO2 glass (CTS) was employed as the ceramic brazer for the bonding of 3 mol % yttria stabilized zirconia (YSZ3). Sandwich-like YSZ3-CTS-YSZ3 specimens were fabricated and temperature dependence of the bonding strength was evaluated. An optimum bonding process was achieved at a bonding temperature of 1424 degrees C for 30 min with CTS glass slurry having a glass/organic ratio of 1.82. The effects of processing parameters on the bending was investigated on the basis of the metallurgical evolution at the interface. In addition, predominating factors affecting the bonding strength were also explored.
ORIENTATION OF THE NI MAGNETIC-MOMENTS IN NI-ZN FERRITES
(1995-03-01)
PONG, WF
;
CHANG, YK
;
SU, MH
;
LIN, HJ
;
HO, GH
We report the Ni L(2,3)-edges magnetic circular dichroism measurements of the ZnxNi1-xFe2O4 (x = 0.0, 0.26, 0.50, and 0.75) ferrimagnet. The Ni average magnetic moments were found to decrease significantly with increasing Zn content. This observation is interpreted in terms of the Yafet-Kittel type canting of the Ni magnetic moment and shows values greater than those of the Fe magnetic moment determined from Mossbauer and neutron diffraction measurements. This work provides new information on the effect of Zn doping of Ni-O-Ni and Fe-O-Fe superexchange couplings.
SIMPLE ANALYTICAL METHOD OF CAVITY DESIGN FOR ASTIGMATISM-COMPENSATED KERR-LENS MODE-LOCKED RING LASERS AND ITS APPLICATIONS
(1995-03-01)
LIN, KH
;
LAI, YC
;
HSIEH, WF
;
交大名義發表
;
光電工程學系
An analytical method based on a renormalized q parameter for Gaussian-beam propagation and properly matched self-consistent complex q parameters is proposed to aid in the design of arbitrary-astigmatism-compensated Kerr-lens mode-locked ring cavity lasers. The q parameters throughout the ring cavity can be calculated by solution of an algebraically quadratic equation for an arbitrarily thick Kerr medium when the intracavity laser power is less than the self-trapping power. The Kerr-lens mode-locking strength at the curved mirror was calculated over the stable range. The results indicate that the astigmatism is best compensated so that the stable range of x and y directions have optimal overlapping. Although to maximize the hard-aperturing effect the curved mirror separation must be at the far edge of the stable range, pump and cavity field matching inside the Kerr medium is also necessary. In addition, the insertion of a vertical slit is more effective than insertion of a horizontal slit. A spiking phenomenon is found in the intracavity z scan curve, which can be observed only with thick Kerr materials and a high laser power.
NEURO-FUZZY MODELING AND CONTROL
(1995-03-01)
JANG, JSR
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SUN, CT
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資訊工程學系
;
Department of Computer Science
Fundamental and advanced developments in neuro-fuzzy synergisms for modeling and control are reviewed. The essential part of neuro-fuzzy synergisms comes from a common framework called adaptive networks, which unifies both neural networks and fuzzy models. The fuzzy models under the framework of adaptive networks is called Adaptive-Network-based Fuzzy Inference System (ANFIS), which possess certain advantages over neural networks. We introduce the design methods for ANFIS in both modeling and control applications. Current problems and future directions for neuro-fuzzy approaches are also addressed.
TRANSFER-FUNCTION BETWEEN WAVE HEIGHT AND WAVE PRESSURE FOR PROGRESSIVE WAVES - REPLY
(1995-03-01)
KUO, YY
;
CHIU, JF
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交大名義發表
;
土木工程學系
;
National Chiao Tung University
Modification of Mononobe-Okabe theory
(1995-03-01)
Fang, YS
;
Chen, TJ
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交大名義發表
;
National Chiao Tung University
GENERALIZED MINIMAL DISTORTION SEGMENTATION FOR ANN-BASED SPEECH RECOGNITION
(1995-03-01)
CHEN, SH
;
CHEN, WY
;
交大名義發表
;
電信工程研究所
;
National Chiao Tung University
A generalized minimal distortion segmentation algorithm is proposed to solve the time alignment problem for ANN-based speech recognition. By modeling dynamics of spectral information of an acoustic segment with smooth curves obtained by orthonormal polynomial expansion, a speech signal is optimally divided into segments and then recognized by an MLP recognizer. Experimental results showed that the proposed method outperforms the standard CDHMM method.
ON THE CONVERGENCE OF THE L(P)-NORM ALGORITHM FOR POLYNOMIAL PERCEPTRON HAVING DIFFERENT ERROR SIGNAL DISTRIBUTIONS
(1995-03-01)
CHANG, CH
;
SIU, S
;
WEI, CH
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電控工程研究所
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Institute of Electrical and Control Engineering
The convergence property of the l(p)-norm algorithm for polynomial-perceptron having different error signal distributions will be analyzed in this paper. To see the effect of error signal on the convergence rate, two types of activation functions are considered in the analysis: one is of a linear type and the other is of a sigmoidal type. Different activation functions yield different ranges of output signal and, in turn, yield different error signal distributions. Linear activation function causes the error signal to be distributed in an uncertain way, while sigmoidal activation function causes it to be distributed in a tightly bounded region. Based on this difference the convergence property of the l(p)-norm algorithm, 1 less than or equal to p less than or equal to 2, is investigated in this paper. Expressions of average learning gains are obtained in terms of the power metric p, the error probability, and the upper bound bf the error signal distribution. Analytic results indicate that it is of particular value in using the l(p)-norm algorithm for the perceptron using sigmoidal activation functions. Computer simulation of an adaptive equalizer using this algorithm confirms the theoretical analysis.
A WORST-CASE OF CIRCULARITY TEST ALGORITHMS FOR ATTRIBUTE GRAMMARS
(1995-03-01)
WU, PC
;
WANG, FJ
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交大名義發表
;
資訊工程學系
;
National Chiao Tung University
Although the circularity test problem for attribute grammars (AGs) has been proven to be intrinsically exponential, to date, a worst case for the existing circularity test algorithms has yet to be presented. This note presents a worst-case AG in which the number of incomparable dependency graphs induced at the root is exponential. The worst case can help to clarify the complexity of the problem.
LATERAL TITANIUM SILICIDE GROWTH AND ITS SUPPRESSION USING THE A-SI/TI BILAYER STRUCTURE
(1995-03-01)
LOU, YS
;
WU, CY
;
電子工程學系及電子研究所
;
Department of Electronics Engineering and Institute of Electronics
The effects of internal oxygen impurities released from the TiSiO2 reaction on the lateral silicide growth using the a-Si/Ti bilayer structure are presented. The lateral silicide growth can be effectively retarded by internal oxygen impurities using a-Si/Ti bilayer process after silicidation at a temperature below 700 degrees C. Compared with the simultaneously processed single Ti layer process, it is observed that both high-level oxygen impurities and their redistribution in the possible Si-diffusion paths play the same important role on the suppression of the lateral silicide growth. Finally, the oxygen redistribution-dependent kinetics is developed to give a self-consistent explanation fo; the experimental observations from both the single Ti layer process and the a-Si/Ti bilayer process.
PULSE BUILDUP DYNAMICS OF AN ACTIVELY MODE-LOCKED LASER-DIODE ARRAY IN THE EXTERNAL-CAVITY
(1995-03-01)
WANG, CL
;
KUO, JC
;
CHANG, CS
;
PAN, CL
;
交大名義發表
Dynamic pulse evolution characteristics of an actively mode-locked laser diode array in the external cavity have been investigated, Numerical calculations based on modified traveling-wave rate equations reproduce experimentally observed pulse and spectral width evolution and show that the buildup time is about 45 round-trips, We have also performed a theoretical analysis to understand which of the laser operating parameters would affect the buildup dynamics, It is shown that either higher de bias current or larger radiative recombination coefficient (which is inversely proportional to the excited-state lifetime) will render the laser exhibiting shorter steady-state pulse width and faster evolution to the steady state, Other parameters affecting the buildup, but to a lesser extent, include the radio-frequency (RF) modulation current, spontaneous emission coefficient, and gain coefficient, The power reflectivities of the output mirror and the antireflection coated diode facet, on the other hand, have little effect on the pulse width and buildup time for single pulse generation.
ORIENTATION ASSIGNMENT OF STANDARD CELLS USING A FUZZY MATHEMATICAL TRANSFORMATION
(1995-03-01)
YAN, JT
;
HSIAO, PY
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資訊工程學系
;
Department of Computer Science
It is well known that minimising total wire length reduces routing area in a standard cell layout. After the placement phase, another advanced improvement on total wire length is made by assigning the orientations of standard cells. In the paper, based on fuzzy c-means clustering, the authors develop two-way constrained fuzzy graph clustering and the transformation between the orientation assignment of standard cells and the constrained graph bisection to minimise total wire length. Finally, the proposed algorithm has tested several standard cell layouts, and the experimental results show that the proposed algorithm produces significant wire reduction on total wire length.