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Bimonthly,Started in December 1984 Pesponsible institution:Department of Education of Guangdong Province Sponsor:Guangdong University of Technology Edited,Published,Distributed:Center of GDUT of GDUT Journal,Periodical Center of GDUT

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For the maintenance of academic integrity and ethics, all members of Journal of Guangdong University of Technology (editors, evaluation experts, and authors) must abide by the basic principles of this journal. This editorship strictly implements the peer review system, reviewing all contributions by going through a three-tier review precedure, namely, the editors' initial review, expert evaluation, and then the final review of deputy editors and editors-in-chief, guaranteeing and improving the quality of all the articles. This journal formulates this statement based on the guiding principles and criteria issued by the Committee of the Publication Ethics (COPE).

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, Volume 25 Issue 4

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System Optimizing Based on Function Additivity

Guo Kai-zhong,Huang Ji-ze,Xiong Hai-ou

Journal of Guangdong University of Technology. 2008, 25 (4): 1-4.

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To reveal the relationship between optimizing a certain function of the system and optimizing the relevant functions of its subsystems,which are necessary for realizing the function of the system,this paper studies the mechanism by which the function of the system is not equal to the sum of the relevant functions of its subsystems after probing into system function additivity,and obtains some laws about optimizing the system and its subsystems on condition that their functions are addible.Thus i...

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A Study of the Correlation Between Tube-diameter and Chirality in Electronic Dynamics of Single-walled Carbon Nanotubes

Yang Cheng-ying1,Ding Jian-wen2

Journal of Guangdong University of Technology. 2008, 25 (4): 5-8.

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Regarding both the finite size and the disorder,the dynamic behavior of electron in the single-walled carbon nanotubes with various tube-diameter and chirality is studied in terms of quantum diffusion theory.The results show that there exists a transition from ballistic to nonballistic behavior with the disorder strength increasing.Interestingly,the disorder and defect have different influences on the electronic transport in the nanotubes with various tube-diameter and/or chirality.For the large...

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Fabrication of Vortex Micromixers and Analysis of Their Mixing Characteristics

Wang Ling-xiu,Zhang Ren-yuan,Chen Guan-sheng,Li Shi-dong

Journal of Guangdong University of Technology. 2008, 25 (4): 9-12.

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Based on the diffusion theory during laminar flow,a passive vortex micromixer with higher mixing efficiency by rotation of fluids themselves in the mixer is designed.A simplified fabrication technique for the polymethylmethacrylate micromixer is introduced.Without adhesive,the whole process of the seal can be realized by screw fixation in ultra-pure water.and this way can be explained in theory.The depth of mixing chamber,machined surface roughness and appearance of micromixer were also characte...

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The Mixed Experimental Study and Numerical Simulation Analysis of Micro-Screw Mixers

Li Shi-dong,Zhang Ren-yuan,Chen Guan-sheng,Wang Ling-xiu

Journal of Guangdong University of Technology. 2008, 25 (4): 13-16.

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Is designed A simple structure passive micro-screw mixer without the exclusive turbulence device.According to the introduction to the process and result analysis of the mixed experiment,the relation between the mixed concentration and gray-scale is obtained.After establishing the mathematical and physical model and conducting the numerical simulation of commercial CFD software,this paper finds that the simulation results are similar to the experiment result.

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Monte-Carlo Simulation of Photocurrents of Oligosilanes

Yang Yan-ting1,Yan Yan-ming2,Wu Fu-gen1

Journal of Guangdong University of Technology. 2008, 25 (4): 17-20.

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Computer simulations of the curve of photocurrents with manifold oligosilane thin films is conducted,employing Monte-Carlo program.Considerint the hole is carried along the chain of oligosilane under the electric field while the number of the Si is less than 12,this paper got the wonderful curves,and the simulation result complies with the experimental data.The result indicates that the hole’s being captured by the hopping states between the oligosilane chains is the primary factor in holding ba...

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Effect of Alloy Powder and Electrolyte Amounts on the Performance of Nickel Hydrogen Battery

Pei Lei1,2,Yi Shuang-ping1,He Ye1,Chen Qi-meng1

Journal of Guangdong University of Technology. 2008, 25 (4): 21-23.

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It studies the effect of different alloy powder and electrolyte amounts on the discharging capacities,internal resistance,over charge performance and heavy current(4A) discharging performance of the nickel hydrogen battery.Experimental results show that the impact of cobalt contents of alloy on internal resistance is not big.1 C discharging capacities of cobalt contents 6.0% of alloy powder is higher than that of 5.5%,but the over-charge performance and the heavy current(4A) discharging performa...

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The Effect of Semi-Solid Processing Technology on the Performance of Sn-Bi Alloy

Liu Yao,Li Feng

Journal of Guangdong University of Technology. 2008, 25 (4): 24-27.

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Semisolid Sn-Bi alloy slurry can be obtained by mechnical stirring technology.On the basis of the condition tests of stirring speed and shear time,the microstructure and mechanics properties of semi-solid alloy were studied by optical microscopy and universal testing machine.Test results show that the optimal microstructure of semisolid Sn-Bi alloy can be obtained at shear time 10 min with fixed agitating rate 320 r/min,at the temperature of 145 ℃ or so,and the smaller and nearly rounded solid p...

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The Liquid Cooling System of the Ni-MH Battery Pack for Hybrid Electric Vehicles

Wu Zhong-jie,Zhang Guo-qing

Journal of Guangdong University of Technology. 2008, 25 (4): 28-31.

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With regard to heat dissipation of Ni-MH batteries,a creative design adopting the tube-in-tube liquid cooling for the BTMS has been presented,based on the analysis of the thermal management system of the battery pack for HEVS home and abroad.The design efficient and economical,and all the designs of the parts and the system have been completed.A battery model has been built and compartmentalized with the mesh in GAMBIT.The result of the flow simulation in FLUENT shows that this cooling system ca...

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Robust H_∞ Control of Uncertain Singular Systems with Time-delay

Fan Yong-qing,Jin Chao-yong,Hu Nan-hui

Journal of Guangdong University of Technology. 2008, 25 (4): 32-36.

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The problem of parametric uncertaintiy and external disturbance robust H∞ control of linear singular systems with time delay is discussed.Parametric uncertainty is assumed to be norm bounded.The considered systems are not assumed to be regular and impulse-free beforehand.By using linear matrix inequality method,Delay-dependent sufficient conditions were obtained so that the closed-loop system was not only regular,impulse-free and stable,but it also satisfied a prescribed H∞ performance condition...

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Robust Stability of Uncertain Neutral Systems with Time-delays

Chen Zhen-feng,Jin Chao-yong,Chen De-ying,Fan Yong-qing

Journal of Guangdong University of Technology. 2008, 25 (4): 37-40.

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It analyzed based on the Lyapunov-Krasovskii functional theorem,the robust stability of uncertain neutral systems with time-delays by introducing appropriate matrix variables,and obtainod some new asymptotic stability criteria.Numerical examples show that the results are effective and less conservative than some existing results.

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High Rank Circulant Graphs and a Series of Strong Regular Graphs with Hyperenergy

Chen Wen-ke,Guo Da-chang

Journal of Guangdong University of Technology. 2008, 25 (4): 41-43.

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From the definitions of the energy of a graph and the production of two graphs are given,and their characteristics are analyzed the Bi-Circulant graphs are extended to high ranks circulant graphs.The expressions of their energy.What’s more,a series of strong regular graphs with hyperenergy also can be obtained based on the conclusions from Igor about circulant graphs. 更多还原

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A Block Lower Bidiagonal Preconditioner with GMRES for Systems Derived from Generalized Adams Methods(GAM)

Hou Jia-xun,Guo Da-chang

Journal of Guangdong University of Technology. 2008, 25 (4): 44-48.

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It introduces a lower block bidiagonal preconditioner with GMRES method for solving the linear systems derived from the GAM is introduced.The theoretical arguments and numerical results are given to illustrate that our method is very effective.

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A Study of the Measurement of Lengthways Displacement Applying ESPI

Zhang Qiao-fen,Shi Zhi-wei,Wang Kun

Journal of Guangdong University of Technology. 2008, 25 (4): 49-51.

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A brief introduction to the composition of the ESPI(electric speckle pattern interferometry) is presented.It expounds the interferometry principle of Lengthways Displacement measurement,getting the 3-D lengthways displacement using CCD technology and image processing sofeware. 更多还原

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Algorithm of Graded Embedding Multi-watermarking Based on Encryption of Hyperchaos

Zhang Hui-hua,Zheng Sheng-lin,Pan Bao-chang,Gan Yan-fen,Wen Chuan-xue

Journal of Guangdong University of Technology. 2008, 25 (4): 52-55.

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To prevent that existing single watermarking from being easily attacked and to enhance the security of the general encryption method of multi-watermarking,this paper proposes the algorithm of graded embedding multi-watermarking,based on encryption of hyperchaos.This algorithm of graded embedding multi-watermarking uses hyperchaos sequence to encrypt multi-watermarking,graded embedding of multi-watermarking in original image.In the process of extracting watermarking,this graded Embedding multi-wa...

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An Improved Fast-ICA Algorithm Based on Fourth-Order Cumulant

Jian Ke,Cui Zhi-tao

Journal of Guangdong University of Technology. 2008, 25 (4): 56-60.

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Fast-ICA method is a popular good algorithm nowadays.Tt proposes a new independent component analysis algorithm which uses fourth-order cumulant as the optimized criterion,and improves Newton iteration method by analyzing batch processing fixed-point fast-ICA method.The validity and performance of the proposed algorithm are verified by extensive computer simulations.

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Underdetermined Blind Source Separation Based on Locally Sparse Representations

He Chun-lan1,Wan Zhe2

Journal of Guangdong University of Technology. 2008, 25 (4): 61-64.

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It proposes a new algorithm of locally sparse blind source separation for estimating the mixed matrix A.This method doesn’t require all the samples of the sources are strictly sparse.Firstly all the vectors in the same line were searched for and classified.And then the mixed matrix A determined.The simulation illustrates the effectiveness of this algorithrn.

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Application of Brightness Normalization in Image Processing

Cai Jian-xin,Wang Ren-huang,Huang Yin-yi

Journal of Guangdong University of Technology. 2008, 25 (4): 65-68.

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Regardirer the problem of varying lighting in industrial Image processing pipeline system,this paper(introduces) a brightness normalization method of image by using conics fitting and statistical moments of histogram.First,it used conics fitting method to equalize the image’s brightness of each section,and then adjusted different illumination images to the same brightness level by applying the histogram statistics method.Thus,the strength of illumination no longer affects the test result.

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General Matlab Simulation Model of Photovoltaic Module Based on S-function

Wang Feng,Zhang Miao,Zhang Mao-dun

Journal of Guangdong University of Technology. 2008, 25 (4): 69-72.

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A general model of photovoltaic module based on its mathematic model by using the S-function in Matlab is introduced.The model can simulate the I-V and P-V characteristics of the actual photovoltaic modules at different radiant intensity and temperature.It can be used to do the simulation research on dynamic photovoltaic power system directly.The simulation results prove the rationality and generality of this model.

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Power System Analysis Software Package——BPA in Chinese Copyright

Zhang Yan,Mao Xiao-ming,Chen Shao-hua

Journal of Guangdong University of Technology. 2008, 25 (4): 73-77.

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The power system simulation software is an important tool for programming,research,operating and teaching of the power system.BPA(Bonneville Power Administration) in Chinese copyright has many traits,such as,complete models,strong functions,flexible uses and convenient operation.Especially,it adapts to the simulation of large scale AC/DC power system.It introduces BPA from the aspects of mathematical models,software functions,input and output.It sets out the functions of BPA by the simulation ba...

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Design and Application of Three-level Measure & Control Networks in Enterprises

Tian Xin-liang,Cheng Han-xiang,Jing Huai-cheng

Journal of Guangdong University of Technology. 2008, 25 (4): 78-82.

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From the perspective of practical application,it introduces the design and implementation of the distributed heterogeneous system three-level Measure & Control networks used in an electrical wiring equipment limited corporation.The existing defects of Measure & Control networks and management modes in enterprise are pointed out.The whole design concept,structure,function,as and the design of software,hardware and transmission lines are discussed.It focuses on how to use the Delphi 7.0 to...

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A Study of the Relationship Between Coverage and Capacity in 3G Network Planning

Li Ming1,Liu Hai-lin2

Journal of Guangdong University of Technology. 2008, 25 (4): 83-85.

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In 3G wireless network planning,priority must be given to the coverage and capacity.It discusses the relationship between capacity and coverage beginning with the reverse link budget and propagation model,and gives each kind of simulation results,based on WCDMA system with area load and service demand taken into consideration,which provides reference for wireless network planning.

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Two and Three-dimensional Stability Analyses of Slopes with Local Load on Top Surface(Ⅰ)——Using Strength Reduction Finite Element Method

Yang Xue-qiang1,Ling Ping-ping2,Yang Rui1,Chen Gui-lin3

Journal of Guangdong University of Technology. 2008, 25 (4): 86-93.

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Different equivalent area Drucker-Prager yield criteria on π-plane,such as DP4,DP5 and DP6 yield criteria,can give an approximate estimation of soil failure strength under plane strain condition,which is why the equivalent area DP yield criteria are widely used for two-dimensional slope stability analyses.Combining true triaxial strength failure tests of sand,it demonstrates from quantitative point that the DP4 yield criterion is conservative for safety factor prediction of slope stability,where...

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Disease Analysis and Reinforcement Practice of Nanshui Bridge

Lin Wei-xin1,Liu Hong-rui2,Wu Dong-liang2

Journal of Guangdong University of Technology. 2008, 25 (4): 94-97.

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By the regular surface inspection and special structure examination of Nanshui Bridge in Jinwan District,Zhuhai City,it presents a cause analysis,and proposes reinforcement measures regarding the common diseases in the reinforced concrete bridge,such as steel bar corrosion,bar exposure,concrete abscission,expansion crack,bearing damage and so on.

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Research on Trip Generation Forecasting Model for New Districts

Lu Jian-feng

Journal of Guangdong University of Technology. 2008, 25 (4): 98-100.

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Because of the deficiency of conventional traffic generation forecasting method for the new urban districts,a new model,based on the mechanism of land use-traffic demand,is established.Considering the scale and usage of land utilizing and location potential,it establishes a traffic creating forecasting model which introduces a location potential coefficient.

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