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世界建筑 2024年第4期 50-53页

作者： guangzhou Atelier cnS Architectural Design Limited Company school of Architecture, south china university of technology guangzhou Urban Planning and Design Company Limited 广州市竖梁社建筑设计有限公司华南理工大学建筑学院广州市城市规划设计有限公司

先锋社区位于市桥之心,自古以来承担着番禺政商中心的城市职能,是千年番禺历史文化的缩影,拥有显赫的宗族聚落文化和丰富的工商贸易文化遗存。21世纪以来,因番禺积极融入广州主城区发展,向北形成经济、教育、居住集聚区,导致番禺城市重... 详细信息

先锋社区位于市桥之心,自古以来承担着番禺政商中心的城市职能,是千年番禺历史文化的缩影,拥有显赫的宗族聚落文化和丰富的工商贸易文化遗存。21世纪以来,因番禺积极融入广州主城区发展,向北形成经济、教育、居住集聚区,导致番禺城市重心北移,市桥的功能和空间日渐衰落,成为番禺城市发展的洼地,旧日荣光不再。在中国全面推进城镇老旧小区改造的背景下,本项目以历史文化保护与集体回忆再现为导向,探究不同于一般老旧社区微改造的新路径、新思路。

关键词：历史文化保护老旧社区城市职能微改造集聚区集体回忆重心北移文化遗存

Microwave peak absorption frequency of liquid

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Science china(Physics,Mechanics & Astronomy) 2008年第9期51卷 1254-1263页

作者： HAN GuangZe1 & CHEN MingDong2 1 Department of Physics,south china university of technology,guangzhou 510640,china 2 guangzhou Auto College,south china university of technology,guangzhou 510800,china 1. Department of Physics South China University of Technology Guangzhou 510640 China 2. guangzhou Auto College South China University of Technology Guangzhou 510800 China

Microwave-assisted extraction is a new effective method which has practical ap-plications in many fields. Microwave heating is one of its physical mechanisms,and it also has the characteristic of selectivity. When the applied microwave fre-quency equals a certain absorption frequency of the material (or specific compo-nent),the material will intensively absorb microwave energy. This is also known as resonant absorption,and the frequency is called the peak absorption frequency which depends on the physical structure of the material. In this work,dynamic hy-drogen bond energy was included in molecular activation energy; with the liquid cell model,the expression of interaction energy between dipolar molecules was derived. The rotational relaxation time was gotten from the Eyring viscosity formula. Then based on the relationship between dielectric dissipation coefficient and re-laxation time,the expression of microwave peak absorption frequency as a func-tion of the material physical structure,rotational inertia and electrical dipole mo-ment of molecules was established. These theoretical formulas were applied to water and benzene,and the calculated results agree fairly well with the experi-mental data. This work can not only deepen the study of the interaction between microwave and material,but also provide a possible guide for the experiment of microwave-assisted extraction.

关键词： microwave-assisted extraction microwave heating relaxation time liquid viscosity peak absorption fre-quency

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

Linearly time-varying channel estimation and training power allocation for OFDM/MIMO systems using superimposed training

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Science china(Information Sciences) 2011年第7期54卷 1456-1470页

作者： ZHANG Han 1,DAI XianHua 2 & Pan DaRu 1 1 school of Physics and Telecommunication Engineering,south china Normal university,guangzhou 510006,china 2 Department of Information Science and technology,SUN Yat-sen university,guangzhou 510026,china 1. school of Physics and Telecommunication Engineering South China Normal University Guangzhou 510006 China2. Department of Information Science and Technology SUN Yat-sen University Guangzhou 510026 China

We address the problem of estimating the linearly time-varying (LTV) channel of orthogonal frequency division multiplexing (OFDM)/multiple-input multiple-output (MIMO) systems using superimposed training (ST).The LTV channel is modeled by truncated discrete Fourier *** on this model,a two-step approach is adopted to estimate the LTV channel over multiple OFDM *** also present performance analysis of the channel estimation and derive a closed-form expression for the channel estimation *** is shown that the estimation variances,unlike that of the conventional ST-based schemes,approach to a fixed lower-bound as the training length increases,which is directly proportional to information-pilot power *** wireless communication systems with a limited transmission power,we optimize the ST power allocation by maximizing the lower bound of the average channel *** results show that the proposed approach outperforms the frequency-division multiplexed training schemes.

关键词： OFDM/MIMO systems linearly time-varying channel estimation superimposed training training power allocation

DIMPLE FORMATION ON FRACTURE SURFACE OF STEEL 55SiMnMo

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Acta Metallurgica Sinica(English Letters) 1993年第2期6卷 140-143页

作者： LIANG Sizu LIANG Yaoneng LIU Zhengyi south china university of technology,guangzhou,china Lecturer,Department of Mechanical Engineering No.2,south china university of technology,guangzhou 510641,china south china Univ of technology Guangzhou China

The fracture surface of the normalized steel 55SiMnMo was observed,under tensile device at- tached on the SEM,to be of ductile dimple feature on the bainite which is composed of lath ferrite and austenite *** dimple is essentially nucleated in the *** the austenitic plastic deformation is remarkable during fracturing,the tear ridge of dimple is very sharp.

关键词： dimple plastic deformation ductile fracture steel 55SiMnMo

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

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.

Entropy Assessment on Environmental Influence of Condense Heat in Recovery System in Air-Conditioning Refrigerating Machine

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湖南大学学报（自然科学版） 2009年第S1期36卷 96-101页

作者： TANG Wen-wu1,2,WANG Han-qing1,2(1.school of Energy Science and Engineering,Central south university,Changsha,Hunan 410083,china 2.school of Civil Engineering,Hunan university of technology,Zhuzhou,Hunan 412008,china) school of Energy Science and Engineering Central South University Changsha 410083 China school of Civil Engineering Hunan University of Technology Zhuzhou 412008 China

This paper presented an entropy evaluation method for the influences of condense heat recovery system on the *** at the damage of the condense heat to the environment,an entropy of resource loss and an emission entropy from the condense heat recovery system in the air conditioning refrigerating machine were *** the evaluation of the entropies,we developed a new algorithm for the parameter identification,called the composite influence coefficient,based on the Least Squares Support Vector Machine *** simulation,the numerical experiments shows that the Least Squares Support Vector Machine method is one of the powerful methods for the parameter identification to compute the damage entropy of the condense heat,with the largest training error being-0.025(the relative error being-3.56%),and the biggest test error being 0.015(the relative error being 2.5%).

关键词： air-conditioning refrigerating machine condense heat entropy evaluation LS-SVM

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