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Chen Z.,South China Agricultural University | Liu Z.-M.,South China Agricultural University | Xu Y.-C.,Guangdong Polytechnic Institute
Proceedings - 2nd IEEE International Conference on Advanced Computer Control, ICACC 2010 | Year: 2010

The researches on the high efficient, safe and accurate measurement system of magnetic head pitch and roll angles for the HAA in HDD are relatively lack now. In this paper, the perspective projection transformation of the magnetic head object point in the reference image plane was expressed by using the rotary tensor transformation matrix, and the principle for projection deviation angle between the actual object point and ideal object point was derived. Thus, the measurement system hardware with two sets of two-dimensional platforms and CCD camera for measuring magnetic head spatial pitch and roll angles was established, and based on Wit7.0 toolkit and using Microsoft VB6.0 programming language, the measurement system software were obtained by secondary development. Also, the stable performance of the measurement system based on computer vision was demonstrated in the practical application. © 2010 IEEE.

She L.,Guangzhou University | Qiu L.,Guangzhou University | Wang K.,Guangdong Polytechnic Institute
ICCREM 2013: Construction and Operation in the Context of Sustainability - Proceedings of the 2013 International Conference on Construction and Real Estate Management | Year: 2013

Based on the present situation of building energy conservation design in China and the characteristics of hot summer and warm winter zones, the influencing factors of building energy conservation design in hot summer and warm winter zones is analyzed in this article. The analysis covers: energy conservation technology (which includes design standards for energy conservation, building envelope structure and materials of energy conservation); economic influencing factors (which include internal and external economic laws); and social cognitive factors (which include the awareness of governments, developers and citizens). Conclusions made on various kinds of measures (which include the courage of using passive control methods, promotion of economic incentive policy and improvement of social cognition) should be taken for the situation that building energy conservation design has not been valued in hot summer and warm winter zones. © 2013 American Society of Civil Engineers.

Yunyun Z.,Guangdong Polytechnic Institute | Guoqing Z.,Guangdong University of Technology | Weixiong W.,Guangdong University of Technology | Weixiong L.,Tech Force
Heat and Mass Transfer/Waerme- und Stoffuebertragung | Year: 2014

Under hard acceleration or on a hill climb of (hybrid) electronic vehicles, the battery temperature would increase rapidly. High temperature decreases the battery cycle life, increases the thermal runaway, and even causes a battery to explode, that making the management of battery temperature an important consideration in the safety using of electronic vehicles. A study of increasing heat transfer area from the beginning design phase has been conducted to determine and enhance the heat dissipation on the battery surface. Both experiment and simulation methods were used to analyze the cooling performance under identical battery capacities and heights. Optimal external dimensions and cell sizes with the consideration of better battery workability was obtained from the analysis. The heat transfer coefficients were investigated in order to regulate the battery temperature under safety operating range. It was found that the temperature of the experiment battery would be controlled under safety critical when the cell was designed for 180 mm × 30 mm × 185 mm sizes and the surface heat transfer coefficient was 20 W m-2 K -1 at least. © 2014 Springer-Verlag Berlin Heidelberg.

Xu Y.-C.,Guangdong Polytechnic Institute | Shen S.-Q.,Guangdong Polytechnic Institute | Chen Z.,South China Agricultural University
Proceedings - 2nd IEEE International Conference on Advanced Computer Control, ICACC 2010 | Year: 2010

Because sugarcane average unit yield was affected by multiple factors in its growth and its inherent law was lack of external correlation data mining, the precise of the prediction method was low. Recently, the adaptive of modern intelligent genetic neural network algorithm for multi-factor effect has been strong, and the prediction accuracy has been high, but with which in sugarcane average unit yield prediction the researches are few. In this paper, based on the characteristics of external factor variable, the input multiple factors of sugar varieties, weather, etc. are optimized by multiple regression model, and the weight and threshold and the network structure of neural network model are optimized by the genetic model of SGA / IGA, etc., which improves the adaptive fitness of genetic BP neural network model. Moreover, an example comparison of this algorithm and the gray linear system, S-BP, SGA-BP, IGA-BP on sugarcane average unit yield prediction is made. The results show that the integrated prediction accuracy and effectiveness of the improved genetic BP (IGA-BP) algorithm model on sugarcane average unit yield is optimal. This research provides a means of accurate prediction for sugarcane market price in significant fluctuations. © 2010 IEEE.

Liang J.,Guangdong Polytechnic Institute | Wu Z.,Guangdong Polytechnic Institute
Mathematical Problems in Engineering | Year: 2015

A model of 2 kW air-cooled proton exchange membrane fuel cell (PEMFC) stack has been built based upon the application of lightweight hybrid vehicle after analyzing the characteristics of heat transfer of the air-cooled stack. Different dissipating models of the air-cooled stack have been simulated and an optimal simulation model for air-cooled stack called convection heat transfer (CHT) model has been figured out by applying the computational fluid dynamics (CFD) software, based on which, the structure of the air-cooled stack has been optimized by adding irregular cooling fins at the end of the stack. According to the simulation result, the temperature of the stack has been equally distributed, reducing the cooling density and saving energy. Finally, the 2 kW hydrogen-air air-cooled PEMFC stack is manufactured and tested by comparing the simulation data which is to find out its operating regulations in order to further optimize its structure. © 2015 Jingming Liang and Zefeng Wu.

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