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Efficient CRT-based residue-to-binary converter for the arbitrary moduli set

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Science china(Information Sciences) 2011年第1期54卷 70-78页

作者： CHEN JianWen & YAO RuoHe School of Electronic and Information Engineering,south china university of technology, Guangzhou 510640,china 1. School of Electronic and Information Engineering South China University of Technology Guangzhou 510640 China

The conversion from residue to weighted binary representation plays an important role in the residue number *** on Chinese Remainder Theorem,a new residue-to-binary converter using arbitrary moduli set is *** new converter uses the difference-correction algorithm for the conversion output and eliminates the modulo M operation,where M is the dynamic range of the residue number *** sizes of the multipliers and modular multipliers in the new converter are small,thereby reducing the area and delay of the proposed *** and synthesis results indicate that the new converter is more area-time effcient than the published converters based on Chinese Remainder Theorem.

关键词： RNS Chinese Remainder Theorem difference correction modular arithmetic residue-to-binary arbitrary moduli set

A Novel Sulfided Mo/C Catalyst for Direct Vapor Phase Carbonylation of Methanol at Atmospheric Pressure

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Journal of Natural Gas Chemistry 2003年第1期12卷 31-36页

作者： Feng PengDepartment of Chemical Engineering, south china university of technology, Guangzhou 510640, china Department of Chemical Engineering South China University of Technology Guangzhou 510640 China

The direct carbonylation of methanol, without any halide in the feed as apromoter, is presented. A series of Mo catalysts supported on activated carbon, γ-Al_2O_3 and SiO_2were prepared. The results show that the support greatly affects the Mo catalyst in the directvapor-phase carbonylation of methanol, and activated carbon is the best supports of the investigatedsupports. In addition, the relationships between adsorptions of NH_3 and CO and carbonylation ofmethanol were investigated. A novel sulfided Mo/C catalyst had high activity and selectivity for thevapor phase carbonylation of methanol to methyl acetate without the addition of a CH_3I promoter tothe feed. The reaction conditions were optimized at a reaction temperature of 573 K, a methanolconcentration of 23 mol% and a carbon monoxide space velocity of 3,000 L/(kg·h). Under theseoptimal conditions a methanol conversion of 50%, carbonylation selectivity of 80 rnol%, andspace-time yield of 8.0 mol/(kg·h) were obtained. The active phase of this novel sulfided Mo/Ccatalyst is the non-crystalline phase, and the active component is present as MoS_(2.5) on thesurface of the activated carbon.

关键词： methanol carbonylation sulfided catalyst molybdenum catalystsupport activated carbon heterogeneous catalysis

CATHODIC REDUCTION OF METAL-CHLORIDE COORDINATION IONS

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中国有色金属学会会刊：英文版 1994年第1期4卷 39-44页

作者： Zen, Zhenou(Department of Applied Chemistry Chemistry,south china university of technology, Guangzhou510641, china)Yang, Songqing(Department of Chemistry, Central south university of technology, Changsha 410083, china)

ＣＡＴＨＯＤＩＣＲＥＤＵＣＴＩＯＮＯＦＭＥＴＡＬ－ＣＨＬＯＲＩＤＥＣＯＯＲＤＩＮＡＴＩＯＮＩＯＮＳＺｅｎ，Ｚｈｅｎｏｕ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＣｈｅｍｉｓｔｒｙＣｈｅｍｉｓｔｒｙ，ＳｏｕｔｈＣｈｉｎａ... 详细信息

ＣＡＴＨＯＤＩＣＲＥＤＵＣＴＩＯＮＯＦＭＥＴＡＬ－ＣＨＬＯＲＩＤＥＣＯＯＲＤＩＮＡＴＩＯＮＩＯＮＳＺｅｎ，Ｚｈｅｎｏｕ（ＤｅｐａｒｔｍｅｎｔｏｆＡｐｐｌｉｅｄＣｈｅｍｉｓｔｒｙＣｈｅｍｉｓｔｒｙ，ＳｏｕｔｈＣｈｉｎａＵｎｉｖｅｒｓｉｔｙｏｆＴｅｃｈｎ...

关键词： cathodic reduction metal chloride coordination ions copper chloride zinc chlo-ride lead chloride chronopotential method

Some features of welding arc radiation

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china Welding 1996年第2期5卷 96-101页

作者： SONG Yonglun(Prof.south china university of technology,Guangzhou,510641,china)

This investigation is an attempt to obtain quantitative knowledge of the radiation from welding arc,which includes intensity distribution,radiant energy transfer and *** attention is paid to the meaning of optical thickness of welding arc at different welding current *** may provide an useful basis for practical applications,such as ultraviolet radiation protection,information sensingfrom welding arc light,as well as temperature and density measurement in arc plasmas.

关键词： welding arc radiation optical property

Integration of chemical product development, process design and operation based on a kilo-plant

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Progress in Natural Science:Materials International 2006年第6期16卷 600-606页

作者： QIAN Yu, WU Zhihui and JIANG Yanbin (School of Chemical Engineering, south china university of technology, Guangzhou 510640, china) [a] School of Chemical Engineering South China University of Technology Guangzhou China

Presented in this paper is an integrated approach of computer-aided product development, process design and operation analysis based on a kilo-plant. The implemented kilo-plant, as a research platform to manufacture product in kilogram-scale, was designed especially for fine and specialty chemicals. The characteristics of product synthesis, process operation and product quality control are investigated coupled with computer-aided monitoring, online modeling, simulation and operation process optimization. In this way, chemical product discovery, process design and operation are integrated in a systematic approach, in the aim to respond to rapid changing marketplace demands to new products.

关键词： integration kilo-plant product development process operation process analysis.

Estimation of underdetermined mixing matrix based on support vector machine

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Progress in Natural Science:Materials International 2007年第11期17卷 1363-1367页

作者： Yang Zuyuan and Xie Shengli(School of Electrics & Information Engineering, south china university of technology, Guangzhou 510641, china) School of Electrics & Information Engineering South China University of Technology Guangzhou 510641 China

In underdetermined blind source separation (BSS), a novel algorithm based on extended support vector machine (SVM) is proposed to estimate the mixing matrix in this paper, including the number of the active sources. Instead of traditional clustering algorithms, it mainly takes the modulus of observations and the number in each direction of arrival, without any prior knowledge about the sources except for sparsity, and it is not sensitive to the initial values. Simulations are given to illustrate availability and robustness of our algorithm.

关键词： underdetermined BSS SVM clustering

RAZUMIKHIN-TYPE THEOREMS FOR ASYMPTOTIC STABILITY OF IMPULSIVE STOCHASTIC FUNCTIONAL DIFFERENTIAL SYSTEMS

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Journal of Systems Science and Systems Engineering 2010年第1期19卷 72-84页

作者： Pei CHENG~1 Feiqi DENG~2 Xisheng DAI~3 Systems Engineering Institute,south china university of technology,Guangzhou 510640,china Systems Engineering Institute South China University of Technology Guangzhou China

In this paper, we investigate the pth moment uniformly asymptotic stability of impulsive stochastic ftmctional differential systems by extending some Razumikhin-type theorems. Based on the Lyapunov functions and Razumikhin techniques, some criteria are established and their applications to impulsive stochastic delay systems are proposed. An illustrative example shows the effectiveness of our results.

关键词： Stochastic functional differential systems Impulse Razumiltial theorems Asymptotic stability

A STUDY OF THE INFLUENCE OF INTERFACIAL DAMAGE ON STRESS CONCENTRATIONS IN INTRAPLY HYBRID COMPOSITES

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Acta Mechanica Solida Sinica 2001年第2期14卷 161-168页

作者： Zeng Qingdun Lin Xuehui (College of Traffic and Communications, south china university of technology,Guangzhou 510640, china) Coll. of Traffic and Communications South China University of Technology Guangzhou 510640 China

In the axial tensile failure process of intraply hybridcomposites, the breakage of some fibers may lead to interfacialdamage, thus directly influencing the local stress concentrationsnear the sites of breakage. A modified shear-lag model, in which theinterfacial damage is considered, is proposed. Based on the model,the influence of interfacial shear strength on the stressconcentrations and the lengths of interfacial damage zone is firststudied. The present results also provide an important theoreticalbasis for investigating the failure mechanism and hybrid effects forsuch kind of composites.

关键词： intraply hybrid composites interfacial damage stress concentration

AN OPTIMAL KANBAN SYSTEM IN A MULTI-STAGE,MIXED-MODEL ASSEMBLY LINE

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Journal of Systems Science and Systems Engineering 2010年第1期19卷 36-49页

作者： Lei YANG~1 Xiaopeng ZHANG~2 Mingyue JIANG~3 School of Business Administration,south china university of technology Guangzhou 510640,china School of Business Administration South China University of Technology Guangzhou China

This paper studies the parameter design and the performance optimization of a Kanban system without stockouts in a multi-stage, mixed-model assembly line. The model of a Kanban system based on production processes is established by examining the relationship among the set-up time, the amount of work in process （WIP）, the capacity indicated by a Kanban, and the takt-time ratio. A novel method for optimizing performance on the premise of no stockouts is proposed. Empirical results show that the amount of WIP is reduced remarkably after optimization.

关键词： Multi-stage mixed-model assembly line Kanban management amount of WIP one-piece flow