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Xue Y.,Guangdong Polytechnic Institute | Xu L.,Shanghai University | Qiu B.,Guangdong Polytechnic Institute | Wang L.,Shanghai University | Zhang G.,Shanghai University
Eurasip Journal on Wireless Communications and Networking | Year: 2016

With the rise of social data media, the cyber world nearly parallels to the real world. The trajectory of a hot event is reflected in social media by Public Opinion Data Space (OS) and Actual Behavior Data Space (BS). However, the relationships with a variety of mechanisms in each space or between them are often unknown. To solve the above issues, the traditional methods for inferring relationship are by performing a statistical similarity analysis of time sequence from dynamic elements. In specially, the research of clustering nonlinear correlation data object is rare, so we propose Matrix Similarity Clustering Algorithm (MSCA) based on random matrix theory and combined with sliding window technology to cluster the similarity of multidimensional time sequences. This method is effective to detect the trend relationship of time sequences with multiple dynamic elements. In addition, we construct a knowledge map to analyse the relationships in OS and BS. © 2016, The Author(s).

Xie X.-T.,Guangdong Polytechnic Institute | Xie X.-T.,Guangdong University of Technology | Zhang B.-X.,Guangdong University of Technology
Xitong Gongcheng Lilun yu Shijian/System Engineering Theory and Practice | Year: 2015

This paper proposed a lead time and capacity decision-making model with considering demand is sensitive to lead time and lead time guarantee has certain reliability. On this basis, we used queuing theory to establish M/M/1 enterprise's model by the characteristics of manual operation make-to-order systems, and M/D/1 enterprise's model by the characteristics of automatic make-to-order systems. The solutions of the two models show that the optimal promised lead time and capacity expansion have the relationship of the function of Nike, and the values of them are restricted by the lead time reliability. After some management revelations are presented by further analyzing the models. Finally, a numerical example was to verify the validity of models. ©, 2015, Systems Engineering Society of China. All right reserved.

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.

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.

Wang J.,South China Normal University | Qin X.,Guangdong Polytechnic Institute | Jiang Y.,South China Normal University | Wang X.,South China Normal University | And 4 more authors.
Optics Express | Year: 2016

A proof-of-principle demonstration of a one-way polarization encoding quantum key distribution (QKD) system is demonstrated. This approach can automatically compensate for birefringence and phase drift. This is achieved by constructing intrinsically stable polarization-modulated units (PMUs) to perform the encoding and decoding, which can be used with four-state protocol, six-state protocol, and the measurement-device-independent (MDI) scheme. A polarization extinction ratio of about 30 dB was maintained for several hours over a 50 km optical fiber without any adjustments to our setup, which evidences its potential for use in practical applications. © 2016 Optical Society of America.

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.

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.

Xu F.,Key Laboratory of Key Technology on Agricultural Machine and Equipment | Xu Y.,Guangdong Polytechnic Institute | Li C.,Key Laboratory of Key Technology on Agricultural Machine and Equipment
Advanced Materials Research | Year: 2012

In order to high efficiently prevent and cure the diffusion of heavy metal loss in mining area, this paper investigated the main ways of heavy metal loss, built the diffusion model of its non-steady-state and uniform loss, and solved the model by integration, a time-varying function on the path of heavy metal loss which diffused into soil and runoff waters in the mine area was acquired, and a method of efficient prevention and cure was obtained. The results shows that the continuous existence of heavy metal in the mining area will aggravate and increase the regional pollution of soil and runoff waters, among them, the diffusion speed of heavy metal loss dissolved into runoff waters due to soil erosion in mining area will be faster and the hazard will be lager, there exists a high pollution concentration in the estuarine of new waters which the runoff flowed into. The effective recovery of heavy metal residue and waste liquid in mining area, and the decrease of discharge concentration is the important ways to effectively reduce the improvement costs of heavy metal pollution area and improve the harnessing effect, if further combing the restorations of engineering plants and bacteria improvement for heavy metal polluted area, which would be more efficient and rapid, and is worth studying and popularizing. © (2012) Trans Tech Publications, Switzerland.

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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