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🏛️國立陽明交通大學機構典藏

Author: search.filters.author.Huang, CC

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Now showing 1 - 10 of 63
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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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    A background comparator calibration technique for flash analog-to-digital converters
    (2005-01-01)
    Huang, CC
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    Wu, JT
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    電子工程學系及電子研究所
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    Department of Electronics Engineering and Institute of Electronics
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    Unsteady vortex roll structures in a mixed convective air flow through a horizontal plane channel: A numerical study
    (1997-02-01)
    Yu, CH
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    Chang, MY
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    Huang, CC
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    Lin, TF
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    機械工程學系
    A three-dimensional unsteady numerical simulation was conducted to investigate the buoyancy induced vortex how structures in a forced air flow through a bottom heated horizontal plane channel. In particular, a third-order upwind finite difference scheme was chosen to solve the Navier-Stokes and energy equations. In the ranges of the Reynolds number Re from 20 to 50 and Rayleigh number Ra up to 31 000, several roll structures were predicted. In the steady flow at high Re and low Ra after the initial transient the longitudinal rolls possess spanwise symmetry and grow regularly to a fully developed state as it proceeds downstream. While in the time periodic flow at low Re and high Ra the rolls may tilt towards the right side wall and the flow is asymmetric or they may tilt to both sides and are symmetric, depending on the particular case studied. This roll tilting causes the rolls to terminate as they encounter the side walls. Meanwhile, new space is provided in the region near the other side of the duct or near the central vertical plane for the generation of new cells. It is also noted that the rolls are wavy in axial direction. Moreover, the rolls change their sizes during moving downstream and no fully developed state can be discerned. Based on the present data, correlating equations for the onset of convection and Hopf bifurcation were proposed. Copyright (C) 1996 Elsevier Science Ltd.
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    Predicting the permeability and tensile behavior of high density polyethylene/tie/polyamide 6 three-layer films
    (2004-12-01)
    Huang, CH
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    Wu, JS
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    Huang, CC
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    應用化學系
    ;
    Department of Applied Chemistry
    Multilayer films with multiple properties have been widely applied in the packaging industry. In order to know the two most important properties, ie permeability and tensile property, of the multilayer films, we examined model predictions and the properties of the individual component layers to provide an efficient method to design desired multilayer structures. The series model was employed for predicting permeability; there is good agreement between experimental data and this model for predicting both gas and water vapor permeabilities of three-layer films with various thickness fractions of polyamide 6 (PA-6). We can also predict the parameters of the constitutive equation, which described the plastic deformation of the three-layer films, from those of the individual component layers, with particularly high accuracy by using the additive rule. However, there was a larger discrepancy between the model and experimental data at high crosshead speeds due to the generation of heat during deformation. (C) 2004 Society of Chemical Industry.
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    Reactive compatibilization of polymer blends of poly(butylene terephthalate) (PBT) and polyamide-6,6 (PA66) .1. Rheological and thermal properties
    (1997-04-01)
    Huang, CC
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    Chang, FC
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    應用化學系
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    Department of Applied Chemistry
    Epoxy resin (EEW = 2060) has been demonstrated to be an efficient reactive compatibilizer for the incompatible polymer blends of polyamide-6,6 (PA66) and poly(butylene terephthalate) (PET). Processability improvement has been achieved by reducing die swell and melt fracture during blending extrusion. Reactions involved in this three-component system are very complex but only the coupling reactions between epoxy and PBT and PA66 endgroups are considered essential. This epoxy resin is more compatible with PET than with PA66 but the reactivity of the former is slower than that of the latter. Additionally, PET has a lower melting temperature than that of PA66; this epoxy resin therefore has the first chance to react with PBT, then with PA66, at the interface. Certain mixed copolymers, epoxy-co-PBT-co-PA66, are expected to be formed and to anchor at the interface. These mixed copolymers are believed to be the major contributor in improving the compatibility of incompatible PA66/PBT blends. (C) 1997 Elsevier Science Ltd.
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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.