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收集所有交通大學研究人員與學生個人或團體所發表之各項學術著作，涵蓋期刊論文、教師專書、學位論文等項。;;Collections of Publications of NCTU Researchers and Students Like Journal Papers and Thesis.

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🏛️國立陽明交通大學機構典藏

Access type: Open accessAuthor: search.filters.author.Huang, CC

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Now showing 1 - 10 of 42
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    Effect of enantiomeric excess on surface structures and phase sequences in free-standing liquid-crystal films
    (2002-12-01)
    Cady, A
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    Liu, ZQ
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    Han, XF
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    Wang, ST
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    Veum, M
    We present differential optical reflectivity and null transmission ellipsometry data from several mixtures of MHPBC enantiomers. From this data, we have determined the chiral smectic phase sequence as a function of enantiomeric excess. The data suggest a change in the structure of the smectic-C(alpha)* phase and the surface tilt state as the enantiomeric excess is reduced. The results also show that the intermediate phases, smectic C(FI2)*, smectic C(FI1)*, and smectic C(alpha)*, disappear sequentially on reducing the net chirality.
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    Triplet-to-singlet exciton formation in poly(p-phenylene-vinylene) light-emitting diodes
    (2003-01-24)
    Lin, LC
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    Meng, HF
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    Shy, JT
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    Horng, SF
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    Yu, LS
    The triplet to singlet exciton formation ratio in a MEH-PPV light-emitting diode is measured by comparing the triplet-induced absorptions with optical and electric excitations at the same singlet exciton density. The ratio is a strong universal decreasing function of the averaged electric field. Using 4 ns for singlet to triplet intersystem crossing time, the ratio is significantly larger than the spin-independent value 3 at intermediate field but is reduced to about 2 for higher field.
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    Multiple-cell square-type layout design for output transistors in submicron CMOS technology to save silicon area
    (1998-06-01)
    Ker, MD
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    Wu, CY
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    Huang, CC
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    Chen, TY
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    電子工程學系及電子研究所
    A new multiple-cell square-type layout design is proposed to realize the large-dimension output transistors for submicron low-voltage CMOS ICs. By using this layout design, the layout area of CMOS output buffers can be effectively reduced 30-40% with respect to the traditional finger-type layout. The drain-to-bulk parasitic capacitance of the output transistors is also reduced 40% by this square-type layout. Experimental results in a 0.6 mu m CMOS process have shown that the maximum driving (sinking) capability per unit layout area of a CMOS output buffer realized by the proposed multiple-cell square-type layout is improved 54% (34%) more than that by the traditional finger-type layout. The human-body-model (machine-model) ESD robustness per unit layout area of the CMOS output buffer realized by the proposed multiple-cell square-type layout is increased 25.2% (17.3%) as comparing to that by the traditional finger-type layout. (C) 1998 Published by Elsevier Science Ltd. All rights reserved.
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    Alkaline hydrolysis of the sludge generated from a high-strength, nitrogenous-wastewater biological-treatment process
    (1998-07-01)
    Lin, JG
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    Ma, YS
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    Huang, CC
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    環境工程研究所
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    Institute of Environmental Engineering
    The production of acrylonitrile butadiene styrene (ABS, a petrochemical product) in Taiwan is one of the biggest manufactoring processes in the world. The large amount of ABS sludge generated in the wastewater treatment plant from the highly nitrogenous-wastewater contains significant amount of complex and biorefractory organic substances. Resource recovery is the optimal conception of the traditional sludge treatment for the purpose of organic matters removal. An alkaline pretreatment method is used to enhance the efficiency of biological hydrolysis of industrial wastewater sludge in the present study. The operating conditions for the alkaline pretreatment of the ABS sludge were maintained at room temperature (25+/-3 degrees C), reaction time of 24h, total solids in the feed of 0.5-2%, and NaOH dosages of 10-50 mg l(-1). Considering the increasing concentrations of soluble chemical oxygen demand and biochemical oxygen demand, the experimental results indicated that the alkaline pretreatment method was useful in biodegradability enhancement. (C) 1998 Elsevier Science I;tn. All rights reserved.
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    Effects of age and gender on remote pointing performance and their design implications
    (1999-03-20)
    Hsu, SH
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    Huang, CC
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    Tsuang, YH
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    Sun, JS
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    工業工程與管理學系
    The purpose of this research is to investigate the effects of age and sex on remote pointing movements. In addition, an attempt was made to incorporate possible age-related or sex differences into the design of a remote pointing user interface. The subjects were recruited from three age groups (elderly, middle-aged, and young) with equal number of both sexes. The participants were required to perform cursor positioning tasks using a remote pointing device. Their static hand stability and remote positioning time were recorded and analyzed. The remote positioning time was further separated into two components: initial submovement duration and adjustment submovement duration. The results reveal that age-related effects reduced the subjects' ability to perform remote pointing tasks and also maintained hand stability. However, sex differences had no significant effect on either performance. Moreover, the results also reveal that remote positioning movements for the young group were mostly completed in their initial submovement phase, while the elderly subjects spent most of their movement time on the fine adjustment phase. In light of the fact that different age groups exhibit different kinds of movement behavior patterns, suggestions for the design of signal sensitivity, target features, and display/control gain in remote pointing user interface were outlined.
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    Joint synchronization in eureka 147 DAB system based on abrupt phase change detection
    (1999-10-01)
    Huang, YL
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    Sheu, CR
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    Huang, CC
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    交大名義發表
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    電信工程研究所
    We present a joint symbol, frame, and carrier synchronization method for the Eureka 147 DAB signal in this paper. Symbol timing is determined first by detecting an abrupt change in the phase angle of the complex product between the last quarter of a useful symbol and its cyclic extension in the guard interval. The detection of this abrupt change is based on the maximal likelihood (ML) principle. Frequency offset of fractional carrier spacing is estimated from the phase angle of the autocorrelation after symbol timing is estimated. Coarse frame synchronization and null symbol detection can also be achieved through this correlation information Frequency offset of integral carrier spacing is determined from the convolution outputs between a received phase reference symbol and several locally generated but frequency-shifted phase reference symbols. We found the length of a yard interval is the most important parameter for the synchronization algorithm to work. Simulation results show that the performance of this synchronization method approaches to the ideal synchronization case in both an additive white Gaussian noise (AWGN) channel and a two-path Rayleigh fading channel.
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    A packet-based CAPDM speech coder for PCN applications
    (2000-05-01)
    Liu, CH
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    Huang, CC
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    電信工程研究所
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    Institute of Communications Engineering
    In this paper, we present a median-rate speech coder, the controlled adaptive prediction delta modulation coder (CAPDM), which operates at 16 kb/s with good speech quality and low algorithm complexity [15], The coder is dedicated to personal communication network (PCN) applications and transmits speech samples on the basis of packets. It combines the features of one-step looking forward decision, syllabic companding, instantaneous companding, and adaptive prediction. In addition to the use of a short-term prediction filter, CAPDM also exploits the pitch property to predict speech waveform explicitly. With the aid of a pitch prediction filter, the performance of a CAPDM codec improves about 3 dB in segmental signal-to-noise ratio (SEGSNR), The average SEGSNR of CAPDM.FF is about 21 dB, which is 7 dB over traditional CVSD at 16 kb/s, We also utilize an adaptive postfilter (APF) to enhance the perceptual quality of the decoded speech. The mean opinion score (MOS) listening test of CAPDM.FF with APF shows that its average score achieves 4.19, which is as good as G.728 16-kb/s LD-CELP and is comparable with CCITT G.721 32-kb/s ADPCM, The complexity of CAPDM.FF is evaluated to be 8 MIPS, which Is much lower than that of LD-CELP and could be further reduced by adopting a smaller correlation window for pitch detection. To solve the problem of packet loss, we developed a packet-based waveform substitution method by reinitializing the codec parameters at the beginning of each packet. The simulation results show that CAPDM.FF could tolerate 5% of packet loss and still keep an SEGSNR at 10 db and an MOS at about 3.0.
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    A fully digital noncoherent and coherent GMSK receiver architecture with joint symbol timing error and frequency offset estimation
    (2000-05-01)
    Huang, YL
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    Fan, KD
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    Huang, CC
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    電信工程研究所
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    Institute of Communications Engineering
    We propose a fully digital noncoherent and coherent Gaussian minimum shift keying (GMSK) receiver architecture with joint frequency offset compensation and symbol timing recovery in this paper. Carrier phase offset ran be estimated if the coherent demodulation mode is adopted. The converted base-band complex signal is first frequency discriminated and then passed through a digital filter which performs a fast Fourier transform (FFT), The frequency offset can be estimated from the de component of the FPT, and the symbol timing error can be estimated from the phase angle of the FFT at a specified frequency which is equal to an integral multiple of half the bit rate. These two estimated parameters are then used for frequency offset compensation and symbol timing recovery during a preamble period. Coarse carrier phase can be estimated by averaging sampled in-phase and quadrature-phase signals and finding its phase angle within the preamble period after carrier frequency offset is estimated and compensated. The bit error rate (BER) performance of this GMSK receiver architecture is assessed for an additive white Gaussian noise (AWGN) channel by computer simulation.