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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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Preparation of PVA-SA-PLA Composite Hydrogels and the Diffusibility Performance for NH+4

Lai Zi-ni1,2,Cui Ying-de3,Liang Can-qiang2,Wang Shuai2

Journal of Guangdong University of Technology. 2009, 26 (3): 1-4.

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Hydrogel materials were synthesized by PVA,SA and PLA microspheres,with 5 % calcium chloride and boric acid as crosslinkers.The ammonia ion permeability of the hydrogel is investigated through static penetration.It discusses the effects of the material performance of penetration on ammonia ions.The permeability of ions in hydrogel can be described according to the solution diffusion model.The single-factor test shows that the best production process conditions to prepare hydrogel are crosslinkin...

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The Compatibility of Al-Si Phase Change Materials with Metal Containers and the Protective Coating

Wang Dan,Li Feng,Zhang Ren-yuan,Chen Xiao,Mao Ling-bo

Journal of Guangdong University of Technology. 2009, 26 (3): 5-9.

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The silicon alloy of aluminum is the outstanding energy storage metal material,but it has stronger corrosion of container materials used for putting the alloy.0Cr25Ni20 stainless steel was used as the sill of container materials under the circular conditions of 620 ℃ and 520 ℃ for a long time.In order to further slow down corrosion,the graphite powder,TiB2,the organic resin were used as 3 kinds of heat coatings of main composition.The experimental result indicates that the coating can inhibit th...

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Thermal Cycling Stability of Paraffin Wax as Phase Change Materials for Solar Energy Storage

Chen Xiao,Zhang Ren-yuan,Ke Xiu-fang,Xu Jian-xia

Journal of Guangdong University of Technology. 2009, 26 (3): 10-12.

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Thermal stability of phase change materials,paraffin wax including paraffin wax 54#~56#、paraffin wax 56#~58#,and paraffin wax 58#~60#,with melting temperature between 50 ℃~60 ℃,is studied.The melting temperature and latent heat of paraffin wax were determined by using DSC technique after 1,100,200 and 300 times thermal cycles.The accelerated thermal cycle tests indicate that the melting temperature and latent heat of the paraffin wax change slightly.

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Influence of Dispersion Mode on Stability of Carbon-black Nano-suspensions

Mao Ling-bo1,Zhang Ren-yuan1,Ke Xiu-fang1,Pang Jin-shan1,2

Journal of Guangdong University of Technology. 2009, 26 (3): 13-16.

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To select suitable dispersion equipment,magnetic stirring dispersion,ultrasonic dispersion and ball milling dispersion were experimental researched with w(nano-carbon-black)=0.05 % in Ethylene Glycol aqueous solutions.Magnetic stirring and ultrasonic waves were dispersed at room temperature,and dispersion time was 30 min.The rotational speed of ball milling dispersion was 300 r/min,and ball milling time was 4 h.Gum Arabic was used as dispersant,and w(Gum Arabic) was 0.1%.The results show that th...

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Application Study of Displaying Air Current with Solid Tracer Elements of MgCO3

Ruan Cai-qun,Liu Li-ru,Xie Ling

Journal of Guangdong University of Technology. 2009, 26 (3): 17-19.

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By visualizing the fluid object in question,the fluid flow status can be observed directly.According to the relative theory in fluid dynamics,it analyzes the following characteristic of solid tracer elements used to display the air current.The white powder of MgCO3 as tracer elements was directly put into the air stream,and the results of the experiment were compared with those of the theoretical analysis.The results show that it is an effective way to display the air current with powder of MgCO...

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Theoretical Research on the Influence of the Air Content on the Friction Coefficient of Concrete

Xia Xiao-zhou1,2,Zhang Qing2,Li Li-juan1

Journal of Guangdong University of Technology. 2009, 26 (3): 20-23.

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The concrete is taken as the matrix,and the air holes produced in concrete as the inclusions.Based on the assumption of the D-P yield criterion for concrete matrix,the macroscopic D-P yield criterion for Air-entrained Concrete is finally derived by introducing the energy density supporting function and constructing the approximating function sequence to solve the non derivable problem on the boundary of the air hole for energy density supporting function.The decreasing influence of the air conte...

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Research on the Curves Versus Moment Hysteretic Behavior of Thin-walled Cold-formed Steel Beams

Xie Zhao-ping

Journal of Guangdong University of Technology. 2009, 26 (3): 24-30.

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Eight thin-walled cold-formed steel beams were in cyclically increased loading conditions during the experiment.It investigated the failure shape,and analysed moment versus curvature hysteretic curves.By the analyses,some important parameters of earthquake resistant capability can be reviewed,such as hysteretic behavior,ductility and energy dissipation.They are listed as follows:The Cold-formed thin-walled steel beams exhibits stable hysteresis behavior up to local buckling,and then shows consid...

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Research on the Concrete Quality Control of Concrete-filled Steel Tubular Structure

Dong Song1,2

Journal of Guangdong University of Technology. 2009, 26 (3): 31-33.

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Compared with such concrete defects inspection methods as strike and drilling,the ultrasonic methods has a better suitability for inspection of concrete defects.

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The Structure Parameter Identification of Flexible Floating Lapping Machines

Huang Zhi-jian,Fu Hui-nan,Bu Yan-shan

Journal of Guangdong University of Technology. 2009, 26 (3): 34-37.

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As diamond lapping processing system’s excitation cannot be distinctly detected,Autoregrssive moving-average(ARMA) model the equivalent formulation of the differential equations of vibrating structure was established.Then the identification problem of structural parameters was transformed into the identification problem of parameters of ARMA model.The wavelet method was used in detecting data’s noise reduction.The result shows that the identification precision has been enhanced.

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Kinetic Simulation and Experimental Research on 1100 kN Crank Press Driven by AC Servo Motor

Xiao Yang1,Sun You-song1,Shi Guo-liang1,Li Mian1,Liu Wei1,Li Shao-pei2,Li Xin-zhong2

Journal of Guangdong University of Technology. 2009, 26 (3): 38-41.

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The common asynchronous inductive motor replaced by AC servo motor,an 1100 kN AC servo crank press was developed.The flywheel and clutch eliminated,the flexible and intelligent control of the new AC press was realized.A big capacitor was used in the circuit in order to save and release electric energy.Transmission and driving-control systems of the press are introduced.The mathematic model of the electromechanical system is established and the numerical simulation is conducted.The experimental r...

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Simulation of the Effects of the Connecting Passage on Air Flow Field in the Swirl Chamber

Tang Zhi,Xiong Rui,Liu Fang,Yu Gang

Journal of Guangdong University of Technology. 2009, 26 (3): 42-45.

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The law of the gas’ change in pressure and temperture in the swirl chamber can be got,through using FLUENT software,from the three-dimensional numerical simulation of the combustion process of S195 swirl chamber of diesel engine.Through the comparative analysis,the impact of the connecting passage on air flow field at different angles in the swirl chamber can be obtained.

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Optimization Design of the Silicon Oil Damper for the Engine Crankshaft

Wang Hong-yun

Journal of Guangdong University of Technology. 2009, 26 (3): 46-49.

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The configuration of the silicon oil damper was introduced firstly.The double pendulum model of the crankshaft system with a silicon oil damper is developed.Then,the effects of the design parameters of the silicon oil damper on the torsional vibration amplitude of the crankshaft were analyzed by using the model.An optimization method for determining the design parameters of a silicon oil damper is presented.The proposed method aims at reducing the max torsional vibration amplitude of the cranksh...

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Optimized Control of Uncertain Delay Arm Wrestling Contest Control Systems

Feng Guang1,Wang Qin-ruo2

Journal of Guangdong University of Technology. 2009, 26 (3): 50-53.

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For the Internet-based networked control,long and uncertain time delay causes the performance of control systems to degrade quickly.It uses the Lyapunov function and linear matrix inequality to derive the stability condition and the sufficient conditions of H∞ performance criterion.It also designs and develops the Internet-based arm wrestling contest control system by socket technology.The experiments indicate that the algorithm can improve the performance of the networked control system.

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A Method of Lip Locating Based on Canny Algorithms and Projection

Yang Dong-tao

Journal of Guangdong University of Technology. 2009, 26 (3): 54-56.

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First,the HSV skin model and the geometrical feature are used to detect the face.And then the face is segmented in order to reduce the disturbance by eyes and eyebrows.Finally the lip is accurately located with canny algorithms and projection.The experimental results show that this method is simple and exact.

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A Pretreatment of Image Based on Reformative Homomorphic Filtering

Guo Gui-fa,Wang Ren-huang,Wang Huan

Journal of Guangdong University of Technology. 2009, 26 (3): 57-59.

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After analyzing the features of the images which glisten and have large area dizzy brightness,a new method is proposed.The reformative homomorphic filtering is combined with the function of Gauss,for the pretreatment of the images.Simulated by the experiment,clear binary images can be obtained.Experimental results show that the proposed method is effective.

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Color Grading Based on Three-dimensional Euclidean Distance

Wang Huan,Wang Ren-huang,Guo Gui-fa

Journal of Guangdong University of Technology. 2009, 26 (3): 60-63.

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A method for the classification of white colour,based on the three-dimensional Euclidean distance is proposed.First of all,a white panel was used as the standard measure of the standard light source in which the standard image was thaken,the RGB tri-color respective values of the color were got,and then translated into color space CIELUV.Re-classification of the color in the same light source was conducted to obtain their RGB points.The three-dimensional Euclidean distance was used to measure th...

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Trusted Network Management System Based on Trusted Computing

Hu Xiao-bing,Feng Guang

Journal of Guangdong University of Technology. 2009, 26 (3): 64-67.

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The application of Trusted Computing Platform and implementation is discussed,pointing out that the purpose of the application of trusted computing platform is to set up a trusted network system,and network-based trusted management information system by trusted computing platform applications.Based on the analysis of the environment of trusted network information management system,it employs this model in the information system of graduate student at Guangdong University of Technology.

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The Identification of the Vehicle Licensing Alphabet with the Real-time Joint Fourier Transformation Correlation Recognition

Ma Bei-he,Chen Li,Lei Liang,Wang Bo,Wang Qu,Ma Xiao,Xu Huan-kun

Journal of Guangdong University of Technology. 2009, 26 (3): 68-71.

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Based on the optical Joint Fourier Transformation correlation recognition,the power spectra of the united transformation of the reference image and the target image of a license plate and the distributions of the relative intensity are inputted into the computer for processing.The available information of the spectra is collected and quantified.The relative degree is Real-time evaluated according to the outputted relative peaks and their acutances.The experimental result shows that the relative ...

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An Improved Anti-collision Algorithm Based on Binary Search Algovithm in the RFID System

Deng Jie,Cheng Liang-lun

Journal of Guangdong University of Technology. 2009, 26 (3): 72-76.

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How to quickly and accurately identify the tags in the region of the reader is a key issue of the RFID anti-collision algorithm.In order to efficiently solve the problem that it takes so long a time for the binary search algorithm to identify all the tags in the region of the reader,it proposes an improved anti-collision algorithm,based on the binary search algorithm.By setting a stack and a variable count,it introduces the converse search.Simulation results show that the improved algorithm sign...

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A New Flexible Stellar Auto-Searching Algorithm

Wang Xian,Su Cheng-yue,Wang Ting-ting,Zhou Dong-yue

Journal of Guangdong University of Technology. 2009, 26 (3): 77-81.

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【Abstract】 A stellar auto-searching algorithm,based on mathematical morphology,was proposed.Then a new centering algorithm—Gaussian Fit,was chosen to calculate the center of the stellar image.Real CCD images were used to test the algorithm.The measurement results show the effectiveness of the proposed algorithm.