bluuebunny/crossref_metadata_2025 huggingface dataset:
An Improved FastICA Algorithm and its Application in Image Feature Extraction
Authors: Chen Li Juan , Zou Xiang Jun , Chen Bing Bing , Chen Yan , Li Jing , Zou Hai Xin , Xiong Jun Tao
Published: February 2011

There are most important features hiding in the higher-order statistics information of the images. They are extracted by classical fast-fixed independent component analysis (FastICA algorithm) which requires a large amount of calculation and it is sensitive on the selection of initial point. To overcome the two shortcomings, an improved FastICA algorithm is proposed and mathematical models are constructed. And they are applied to obtain the basic vectors from the images. Finally, take litchi fruit image in natural environment as an instance and experiment with Matlab software. The results show that there are less computation and stronger stability of the improved FashICA algorithm used to extract image features.
The Study on Conic Outline Correction Processing with Column Grinding Wheel
Authors: Li Yan , He Hui Fan , Liu Yong , Zhao Biao Dan
Published: February 2011

In order to make more uniform wheel wear, save production and reduce production costs, we improve the production process and optimize the processing way with the interpolation algorithm and the speed distributed computing by making the error analysis. And then the production process is gradually developed into green, environmental, lower consumption, higher income process.
Design of the Evaluation System for the Value of the Mobile Internet Service
Authors: Chen Xia , Lu Ting Jie
Published: February 2011

The development of the Mobile Internet attracts the world’s attention, and how to evaluate the value of the Mobile Internet Services is one of the basic research issues. The existing evaluation systems for the value of the Mobile Internet Services mainly concerns the customers, however a promising service also need to realize the value of the operating companies, to make the “win-win” between the customers and the operating companies. This paper has established a comprehensive evaluation system based on both of the customers and the operating companies, and verified the application of this evaluation system by taking the example of the Personal Information Services of the Mobile Internet.
Singularity Elimination of Parallel Mechanism by Redundant Actuations
Authors: Zhang Yanfei , Gong Jinliang , Wei Xiu Ting
Published: February 2011

Singularity is a basic problem for parallel mechanism design because of its many negative influences on the mechanism performances. Traditionally, three kinds of singularities are suitable for analysis of the parallel mechanisms. By considering both the common and redundant actuation parallel mechanisms, general kinematic model is used to obtain input factor matrix and output factor matrix. Based on ranks of the two matrices, the singularity type becomes easy to judge. And the second kind of singularity can be reduced or eliminated by adding special redundant actuation sub-chains. A two-degree-of-freedom parallel mechanism is provided to illustrate the method about how to create the needed redundant actuation sub-chains.
Research on the Emission Property of Cold Cathode Emitter with Enhanced Bar Electrode in a FED Panel
Authors: Wu Chao , Cui Yan
Published: February 2011

Using carbon nanotube (CNT) as cathode material, the field emission display (FED) panel with enhanced bar electrode was fabricated. With the photolithography process, the indium tin oxide (ITO) film was divided to form the cathode ITO electrode. The printed silver slurry was sintered to act as the cathode silver electrode, which was prepared on the cathode ITO electrode surface. The insulation layer was also fabricated on the cathode plate. The CNT paste was screen-printed on the surface of cathode ITO electrode and cathode silver electrode to form the field emitter. The detailed fabrication process of FED panel was given, and the sealed FED panel showed better field emission properties. Because of the enhanced bar electrode, the large field emission current was obtained.
Study of Parallel Algorithm Based on OpenMP in Myocardial Simulation
Authors: Wang Juan , Zhang Hong , Wu Rui Juan , Yang Lin , Liu Yong Bo
Published: February 2011

Computer simulation is an important method in the study of cardiac electrophysiology. However, complicated studies in tissues are difficult because of the long computation time. In order to speed up the simulation, in this paper a parallel algorithm based on OpenMP was studied on a multi-core computer. The Noble 91 mathematical model was used to develop a two-dimensional tissue. By initiating a reentrant wave, properties of the conventional sequential program, programs of the data parallelism and functional parallelism were analyzed and compared. The results showed that the execution time of the data parallelism was only about one-fourth of the sequential execution time and its efficiency was high, however, the execution time of the functional parallelism was approximately ten times of the sequential execution time and its efficiency became low. Therefore, the method of the data parallelism could significantly reduce the computation time and was suggested to be a good choice in the myocardial simulation.
Research on Evaluation of Group-Buying Website Based on FAHP
Authors: Chen Shou Ming , Li Ru
Published: February 2011

The group-buying online, a boom of e-commerce phenomenon, expands rapidly in China. Hence, the evaluation of group-buying website is essential for CEO to improve their website performance and for consumers to select the platform to purchase. However, the evaluation of group-buying website is a multiple-criteria decision making (MCDM) problem that is not easy to determine. For this reason, we propose analytical hierarchy process based approaches Fuzzy AHP, to evaluate the group-buying websites. In addition, a case study is presented to demonstrate how the approach can help in solving such problems in practice.
Parallel Knowledge Community Detection Algorithm Research Based on MapReduce
Authors: Xu Min , Yang Pan Pan , Ma Jie
Published: February 2011

Knowledge community detection algorithm is a main technical means to knowledge discovery in complex network. It is used to discover the potential community structures to provide a basis for web services, for example, personalized recommendations. In this paper, a parallel algorithm for knowledge community detection based on MapReduce is proposed. This paper, through various experiments, proves that the efficiency of the parallel algorithm is increased significantly.
Research on the Optimal Model of the Account Sale of the Products in Declining Period of Life Cycle Based on the Demand Shifting
Authors: Sun Qing Wen , Huai Liu
Published: February 2011

Research on the account sale only focused on account sale itself, and it can’t support enterprises sufficiently to make decision of account sale in theory and methodology. So considering the impact of account sale on cash sale in the process of account sale of enterprises, the demand shifting of cash sale because of account sale, the cash sale and account sale characteristics in declining period of products and applying the theories of product life cycle (PLC) and dynamic programming, the paper set up the optimal model of decision-making in declining period of life cycle for the purpose of maximizing total profit of cash sale and account sale and made out the optimal starting time, then determined the best credit policy by exploring the relation between the optimal starting time of account sale and enterprises making credit policies. The paper provides certain proof for enterprises to make reasonable and economical credit policies.
An Improved Asymmetrical Half-Bridge Driving Circuit
Authors: Liao Zhi Ling , Xu Dong , Song Zhong Qi , Xu Yan Jie
Published: February 2011

Aiming at the demerit of the traditional flux coupling driving circuit, an improved driving circuit is proposed which has some advantages, such as simple structure, low cost, the driving source isolated from the main circuit, etc. The proposed circuit can be used on the maximum power point tracking circuit of solar cell which has a wide range duty cycle. The circuit principle analysis is given. At last, experimental results are provided to verify its practicability.
An Improved Engineering Model of Silicon Solar Cell
Authors: Liao Zhi Ling , Xu Yan Jie , Xu Dong
Published: February 2011

An improved engineering model of silicon solar cell is proposed, which uses only four electrical parameters under standard test conditions provided by manufactures. Simulation and experimental results show that the model error was 6 percent below for various combinations of solar radiation and temperature and its accuracy is sufficient for most practical engineering cases.
Comprehensive Analysis of Active Electrified Railway Compensation
Authors: Wang Guo , Tian Ming Xing , Ren En En , Ding Li Na
Published: February 2011

Traction load in electrified railway result in the power supply system contains a lot of negative sequence, harmonic and reactive current. It is necessary to analysis the compensation principle based on active compensation of electrified railway traction power supply system. According to the relation between primary winding and secondary winding of regular traction transformer, we deduced general voltage and general current transform formula, and then deduced completely and negative sequence compensation formulas. It also gives the method of reduce active compensation capacity.
Deposition of Titanium Nitride Film on Mg-Li Alloys by DC Reactive Magnetron Sputtering
Authors: Chen Yu Qiang , Gao Fu Yi , Peng Hong Yan , Jiang Hong Wei , Yin Long Cheng , Wang Dan , Huang Hai Liang
Published: February 2011

A number of studies have shown that TiN film is correlated with corrosion resistance. In this study, we used a reactive direct current magnetron sputtering system to prepare TiN coating on Mg-Li alloys at low temperature. The intermediate TiN layer of thickness was about 1.6 μm from Ti target (99.99% purity). The structures of the resulting nanocatalysts were investigated, using X-ray diffraction analysis (XRD). The surface morphology of the coating was observed by Atomic Force Microscope (AFM). In the corrosive compare experiment the samples of Mg-Li alloys with and without titanium nitride film were put in solution with 5% NaCl respectively. We fund that the Mg-Li alloys with TiN coating has a lower rate of liberation of hydrogen, and the eroded surface morphology was examined by Scanning Electron Microscopy (SEM), it prove that the TiN deposition on the surface of Mg-Li alloys has improved the corrosion resistance performance.
The Research of Newton Iteration Method Based on Hyperchaos Chen System to Mechanism Synthesis
Authors: Liu Qi Yuan , Luo You Xin , Zeng Bin , He Zhe Ming
Published: February 2011

Many questions in natural science and engineering are transformed into nonlinear equations to be found. Newton iterative method is an important technique to one dimensional and multi-dimensional variables and iterative process exhibits sensitive dependence on initial guess point. For the first time, a new method based on utilizing hyperchaos Chen systems to obtain locate initial points to find all solutions of the nonlinear questions and taking improved Newton iterative method was proposed and it has higher solving efficiency compared with chaos Chen systems. The numerical examples in linkage synthesis and approximate synthesis show that the proposed method is correct and effective.
Study on Magnetic Field Effect of AC Motor
Authors: Feng Yue , Zhao Yang
Published: February 2011

This paper analyzed the establishment of pulsating magnetic field for the single-phase asynchronous motor. Put forward a theory of pulsating magnetic field. A discussion of the method is given by graphical analysis of the magnetic field and mathematical derivation of MMF. The analysis is included the magnetic field effect of the three phase asynchronous motor and the two phase AC servo motor. That is synthesized by single-phase pulsating magnetic field based on some way.
A Stackelberg Dynamic Game Model for Climate Change
Authors: Zou Xiao Yan
Published: February 2011

Climate-Change (Global warming) is the central point on the current agenda of the international environmental policy. This paper proposes a model to formulate the global warming policy as dynamic Stackelberg or Leader-Follower Game. In this game, an international agency or international agreement is the leader, who will decide the emission abatement rate of each region; and the followers are several regions who control their consumption of carbon-energy relating to carbon emissions. The challenge of this model is to solve its equilibrium since it is not a liner-quadratic game model.
A New Procedure for Designing a Kind of Orthogonal Vector-Valued Multiscaled Wavelets and Wavelet Wraps
Authors: Gao Hong Wei
Published: February 2011

In this paper, notion of vector-valued multiresolution analysis is introduced. So does the notion of orthogonal vector-valued wavelets A necessary and sufficient condition on the existence of orthogonal vector-valued wavelets is presented by using paraunitary vector filter bank theory and matrix theory. A novel method for constructing a kind of orthogonal shortly supported vector -valued wavelets is presented.
Development of Energy Management System in Integrated Iron and Steel Works
Authors: Zhang Qi , Wang Xiao Ying , Zhang Da Wei , Du Tao , Cai Jiu Ju
Published: February 2011

Energy management system (EMS) will be one of energy-saved technologies for iron and steel route. The paper analyzes EMS structure and development focusing on the energy forecasting, optimization and other key technologies in iron and steel works. Taking gas management subsystem of EMS as an example, the forecasting and optimization are described. Byproduct gas is one of important energy medium in energy system, which can play a significant role in energy savings in iron and steel works. In this paper, the models of byproduct gas generation, consumption prediction and optimal utilization are developed for predicting and distributing byproduct gases to make them emit zero. The results show that: EMS should have hardware and software technology conditions to exert its functions; Energy medium, such as byproduct gas and steam, prediction and optimization will be play an important role in energy conservation and emission reduction.
Spring-Back Evaluation of Stretch Bending Process Based on Chaboche Combined Isotropic-Kinematic Hardening Laws
Authors: Hu Jing , Li Xiao Xing , Chung Kwan Soo , Yao Rao
Published: February 2011

We present a study on spring-back prediction in the stretching bending process using the Chaboche model combined isotropic-kinematic hardening law and Mises yielding criterion, and a material user subroutine (VUMAT, UMAT) program was developed base on the ABAQUS interface for the model. The effects of different hardening law on the spring-back in the stretch forming process was also analyzed and compared. The simulation results show that the combined isotropic-kinematic hardening law has the better spring-back prediction compared with the pure isotropic and kinematic hardening law in the stretch forming process, which is verified by the experimental results.
A Study of Orthogonal Vector-Valued Binary Wavelets and Wavelet Packs with Integer Dilation Constant
Authors: Lv Yan Hui , Chen Qing Jiang
Published: February 2011

The notion of orthogonal vector-valued binary wavelet packs is introduced. Their traits is investigated by virtue of time-frequency analysis method and finite group theory. Orthogonality formulas are established. Orthonormal wavelet pack bases are obtained. A novel method for constructing a kind of orthogonal shortly supported vector-valued wavelets is presented.
Engine Cells Performance Characteristics Modeling and Evaluating
Authors: Zhu Rui , Liu Zhi Rong , Fan Jia Wei
Published: February 2011

For the engine cells performance deterioration and fault diagnostics, the cells operation contributions to engine parameters changes are analyzed to account for the cells deterioration impact on parameters deviation to the EPR based baselines which are optimally modeled by polynomial regression method. The cells performance evaluation strategies for the engine type in this study are achieved through the WF-EGT, (N1-N2)-P25/P2, P3/P2-EGT linear correlation match and baseline deviation analysis and applied for verification.
Design on the Mode of Urban Renewal Public Service Platform
Authors: Deng Ji Qiu , Xie Yang , Chen Xiao Xiang , Li Jun
Published: February 2011

For urban renewal, there are a lot of benefit-related subjects and their needs are cumbersome. As a result, the functions and mode of the platform are relatively complicated. In order to build a platform to solve the problem of public service missing in urban renewal, a study about the needs of the subjects and the function requirements of the platform has first been done. According to this study, we proposed the architecture and mode of urban renewal public service platform, and carried out a detailed analysis of its internal structure, service mode and guarantee system. The platform is finally designed as an open and service-oriented distributed system. Through this way, the design is consistent with the actual operation of urban renewal and can be used to build the platform.
Study on Performance for Fiber Asphalt Mixture Resistance to Water Damage
Authors: Xu Wei , Wang Xuan Cang
Published: February 2011

At present, the fibers improve the performance that asphalt mixture resistance to water damage is still lack systematical awareness. For the different asphalt types, different fiber types, different fiber content of the asphalt mixture, the Marshall residual stability test and freeze-thaw splitting test are carried out, residual stability MS0 and the split strength ratio TSR are choosed as the measure indicators, the results show that: the addition of fibers and the use of modified asphalt can improve asphalt road performance obviously, modified asphalt is the better choice of improving the performance for mixture resistance to low-temperature water damage, the fiber types sorting for improving effects, whch is asphalt mixture’s performance for resistance to water damage, are obtained, and the optimal content scope of different fiber types are obtained too, research achievement can provide scientific guidance and reference for design and construction of fiber asphalt mixture.
Influence of Permanent Magnet Thickness on Loss of Permanent Magnet Brushless DC Motor
Authors: Tang Yu , Xu Yong Xiang , Liang Wei Yan
Published: February 2011

The permanent magnet thickness is a main consideration for the permanent magnet brushless DC motor design. The effect of the magnet thickness on the different loss of the motor and motor output power is considered through the circuit-field coupling finite element method under the full-load operation. 2D transient thermal analysis is carried out as the verification of the design result. The motor is fabricated and the experimental results prove that the design motor with the certain magnet thickness can fulfill the requirements.
Research on Informationization of Financial Management Based on E-Commerce
Authors: Chen Jie , Xia Fang Yi
Published: February 2011

As e-commerce is widely used in modern enterprises, it’s necessary for enterprises to innovate their financial management modes so that corporate financial management could adapt to the requirements of the development of informationization. This research firstly studies the background in which Informationization of financial management based on E-commerce has developed and the connotation of the concept. Then, it analyzes the basic features of financial management in the e-commerce environment and points out the major deficiencies of traditional financial management. Finally, it makes suggestions on how to build an informationization system for financial management based on e-commerce. It is hoped that these analyses and suggestions would be helpful in working out a new mode of corporate financial management.
The Impact of RFID on Supply Chain’s Cost and Profit
Authors: Liang Yan , Cui Hui Jie , Wang Xin
Published: February 2011

In the realm of supply chain, this paper indicates that the costs of supply chain, as well as the bullwhip effect, decrease through building up a model to compare the cost and profit of supply chain before and after using RFID. In addition, profit of supply chain increases at the same time.
Study on the Strength Characteristics of Municipal Solid Waste
Authors: Zhang Zhen Ying , Wu Da Zhi
Published: February 2011

Basing on the traditional tri-axial test on large-scale samples, the strength characteristics of municipal solid waste have been studied. The municipal solid waste is divided into three parts: incompressible solid waste material, reinforced material that is difficult to be biodegraded and the material that is easy to be biodegraded. The proportions of these three parts are 35%, 15% and 50%, respectively. Laboratory test has been performed for different initial void ratios, different proportion of ingredients and different confining pressures. The testing results show that the initial void ratio is the main factor that influences the strength of the municipal solid waste. Besides, the principle effective stress increases with the axial strain in a hardening increasing trend, even though the total axial strain has reached 40%. The principle effective stress also increases with the confining pressure that applied on the testing sample. Furthermore, the principle effective stress decreases with the increasing of the initial void ratio.
Sensor Drifting Fault Diagnosis Based RS and ANN
Authors: Hou Zhi Jian , Chen Huan Xin
Published: February 2011

A strategy based on rough set (RS) and artificial neural network (ANN) is developed to detect and diagnose sensor drifting faults. The reduced information is used to develop classification rules and train the neural network to infer appropriate parameters. The differences between measured thermodynamic states and predicted states obtained from models for normal performance (residuals) are used as performance indices for sensor fault detection and diagnosis. Simultaneous temperature sensor drifting faults of the supply chilled water (SCW) and return chilled water (RCW) can be diagnosis successfully.
A Novel Modified Particle Filter Algorithm
Authors: Gao Qing Hua , Wang Jie , Jin Ming Lu
Published: February 2011

The particle filter (PF) algorithm provides an effective solution to the non-linear and non-Gaussian filtering problem. However, when the motion noises or observation noises are strong, the degenerate phenomena will occur, which leads to poor estimation. In this paper, we propose a modified particle filter (MPF) algorithm for improving the estimated precision through a particle optimization method. After calculating the coarse estimation with the traditional PF, we optimize the particles according to their weights and relative positions, then, move the particles toward the optimal probability distribution. The state estimation and target tracking experiments demonstrate the outstanding performance of the proposed algorithm.
Research on Nonlinear Simulation of Spiral Case in High Head Hydropower Station
Authors: Xu Wei , Ma Zhen Yue , Zhang Cun Hui
Published: February 2011

Based on applying nonlinear simulation with 3D FEM and elastic and plastic damage model of concrete, considering contact property between steel spiral case and peripheral reinforced concrete, calculating the stress levels of reinforced concrete and steel liner computed between directly-embedded spiral case (scheme I) and keeping constant internal pressure spiral case (scheme II), as well as examining the reinforced concrete crack and damage produced by water pressure, the result clearly indicated that scheme II was more excellent than scheme I in high head hydropower station on having the best performance of steel, limiting crack of the concrete, reducing the damage region and decreasing damage index of the concrete.
Linear Precoder-Based Signal Design of H-BLAST in MIMO Wireless Communications System
Authors: Zhang Yan Yu , Zhang Shui Lian , Zhu Yi Jun , Zhu Yao
Published: February 2011

The ability to provide high data rate is a key measure in modern communications system. MIMO(Multiple Input Multiple Output) has emerged as an technique that increases the data rates in 3G systems. In this paper， MIMO signal design based on adaptive modulation and the precoding technology is studied.A scheme for adaptive modulation based on eigenvalues is developed and a precoding matrix will be used at the transmitter according to singular value decomposition. We present a second-time allocation algorithm，rather than traditional waterfilling power allocation.This algorithm together with substream selection，precoding technology and adaptive modulation is the proposed signal design of Horizontal Bell Lab Layed Space and Time （H-BLAST）in MIMOsystem.The scheme is to make the best of constrained power resources based on given QoS.
Study on an Inventory Model of Sales System with Multiple Customer Classification
Authors: Fan Bo , Li Yu Yu
Published: February 2011

Firms segment customers into different classes to which they offer the same product in order to fulfill their demands better. An inventory model of sales system is developed, where customers are classified based on the volume they purchase and penalties levied for delays. The global optimal solution is proved and obtained theoretically and numerically. It is shown that seller should improve the service level of certain class of customer, decrease the order quality, and shorten the length of order cycle when the shortage cost of this class is increased, and seller should keep service level, shorten the length of order cycle, and increase the order quality when the demand of any class of customer is increased.
Classification of the Yangon’s Ports in Myanmar with Efficiency Measurement by Using DEA
Authors: Han Mu Mu , Lin Guo Long , Yang Bin
Published: February 2011

Container terminal production is both an important and complicated element in the contemporary global economy. Amongst other methods, the efficiency of container port or terminal production can potentially be analyzed by Data Envelopment Analysis (DEA). This paper aims to evaluate the efficiencies of the Yangon’s ports using the two alternative techniques. This paper provides a preliminary analysis of Yangon’s port sector for the period (1998-99 to 2007) using DEA in order to asses the impact of transformation. The results are therefore important in terms of the extent to which Yangon’s ports will be capable of competing effectively in the port industry. The scale of merger and takeover activity across the port industry has been extensive in recent years and this can be expected to increase as new opportunities for market penetration and consolidation emerge in the new-private ports sector.
Auto-Tuning of Optimal PI Controller Satisfying Sensitivity Value Constrains
Authors: Chen Yong Hui , Zeng Xiao Hui , Tan Gong Quan
Published: February 2011

For a first-order lag process with dead-time models (FOPDT) under step load disturbances, optimal parameters of proportional and integral (PI) controller are obtained through numerical optimization based on minimizing the integrated time and absolute error (ITAE), or maximizing the integral gain. The optimizations are under constrains of sensitivity functions. Then, the tuning formulas for PI controllers are adjusted according to parameters from numerical fittings of optimized values within a large scope of the ratio of the inertia time to the dead-time of processes. Finally, the process information is acquired from closed-loop tests of a two-channel relay and the process is approximately modeled with a FOPDT model in order to achieve parameter auto-tuning of controllers. The approach proposed is proved to be effective according to simulation results.
Effects of Magnetic Concentrator on MFL Signals Using FEA
Authors: Song Qiang
Published: February 2011

Magnetic flux leakage (MFL) is a non-destructive testing method used to inspect ferrous materials. However, there are a variety of factors that can affect the MFL inspection tool’s ability to detect and characterize anomalies. MFL signals obtained during the inspection of pipes have been simulated using 3D finite element analysis (FEA) and the effects of magnetic concentrator on MFL signals are investigated. Measurements of the leakage flux with various defect depths or widths indicate that the axial component of MFL are improved by magnetic concentrator with the result that significant advantages could be obtained in defect detection schemes, in that the signal to noise ratio (SNR) of MFL signals can be improved by magnetic concentrator.
Double Step Reducing Characteristics Analysis of On-Board High Pressured Hydrogen Transmission
Authors: Li Jing , Zhang Xi , Yin Yao Bao
Published: February 2011

Pressure reducing and control is the key technology in hydrogen transmission for fuel cell cars. A double step system with two direct reducing valves had been provided in this paper. These two valves depressurize the tank hydrogen pressure from 35MPa or 70MPa to 5MPa at first, then to 0.16MPa, adapting the fuel cell demands. The valves static analysis show the flow rate and pressure characteristics are rigid. The dynamic simulation display the valves quick response and pressure control accuracy are satisfied fuel cell working condition. The analogue experiments verify the system reducing performance and the double step reducing system is applicable to fuel cell cars hydrogen transmission.
A Robust Terminal Sliding Mode Adaptive Control for Robot Manipulators
Authors: Qin Zhen Hua , He Xiong Xiong
Published: February 2011

A robust adaptive terminal sliding mode control(SMC) algorithm is developed for the trajectory control of the rigid manipulators. The upper bounds of uncertain nonlinearities and unknown internal parameters of rigid manipulators are estimated through an adaptive mechanism and used for the main part of the controller, and additional part based terminal sliding mode technique is used to compensate the bounded parameters estimation error and achieve robustness of the control system. Continuous sliding mode controller is developed by replacing the signum functions with saturation functions to reduce the chattering that traditional sliding mode have common. The proposed design method is evaluated on a 2-DOF robot manipulator to demonstrate the effectiveness of the theory.
Analysis of a Triple-Effect Low Temperature Distillation Desalination Process
Authors: Zhang Li Xi , Zhang Li Xi , Zhang He Fei
Published: February 2011

A new process of low temperature triple-effect distillation desalination is designed. Firstly, the appropriate effect number is determined. The total heat transfer coefficients and the heat loads of each evaporator are calculated. When the pressure differences between near effects are equal to △P, the freshwater outputs and the heat transfer coefficients of every effect would be increased as △P improved; if △P is too low, the seawater un-evaporated in the last evaporator would be difficult to flow into the next one. By analysis, the appropriate value of △P is 0.005 MPa. If the seawater flowing into the first effect is preheated by the heat source flow outpouring the unit, the total heat utilization rate and the freshwater output would be enhanced.
Algorithms and Algorithm Analysis of Logical Difference Operation of Variable Precision Lower Approximation Operator and Grade Upper Approximation Operator
Authors: Zhang Xian Yong , Mo Zhi Wen , Xiong Fang
Published: February 2011

This paper aims to construct new operation of approximation operators, and explore its calculation. First it proposes logical difference operation of variable precision lower approximation operator and grade upper approximation operator. Then regular algorithm and structural algorithm are proposed and analyzed, and furthermore, a conclusion is drawn that structural algorithm has advantages in time complexity and space complexity. Finally a practical example is given to illustrate the new operation and its algorithms.
Experimental Investigation of Porous Micro Heat Sink for Electronics Cooling Application
Authors: Su Ka Lin , Liu Jing , Rong Jun , Wan Jun Hua
Published: February 2011

A novel porous micro heat sink system was presented for dissipating high heat fluxes of electronic device. The flow and heat transfer of porous micro heat sink was investigated by experiment at the condition of high heat fluxes, and the results showed that the heat load of up to 280W was removed by the heat sink, and the heater junction temperature was 63.8°C at the coolant flow rate of 5.1cm3/s. The whole heat transfer coefficient of heat sink increased with the increases of coolant flow rate and heat load, and the maximal heat transfer coefficient was 33kW(m2.°C)-1 in the experiment. The minimum value of 0.19°C/W for whole thermal resistance of heat sink was achieved at flow rate of 5.1cm3/s, and increasing of coolant flow rate and heat fluxes could decrease the thermal resistance.
Reason-Factor for Online Impulsive Buying
Authors: Chen Wen Jing , Teng Yue
Published: February 2011

Online shopping has become a new shopping style. There is little research about online impulsive buying (OIB). We develop the questionnaire of the reasons for OIB by open and structured questionnaires. There are all about 327 participants took part in our survey, of which 102 participated in the open questionnaire and another225 participated in the structured questionnaire. Based on content analysis, we found that the reason for OIB includes four factors: perceived usefulness, price, entertainment and interpersonal interaction. Internal consistency analyses and CFA (Confirmatory Factor Analysis) showed the questionnaire had high reliability and validity.
Method for Two-People Multiple-Attribute Decision Making and its Application
Authors: Zhang Fang Wei , Xu Shi He , Shi Bao
Published: February 2011

In this paper we study the multi-attribute group decision-making problems and put forward a kind of method. In this method, based on clustering evidence theory, the decision-making information is translated into evidences to support different decision-making program. Then, by the amount of evidences, decision-making program ranking is completed. The method’s character can not only rank the decision-making programs by their merits, but also give each program the probability to be the best. Finally, an example is given to show the rationality and effectiveness of the new method.
A Research Methodology Based on Design Science for the Construction of Cognitive Maps: The Case of a Chinese Steel Company’s Strategic Decision Making
Authors: Zhong Ying Hong , Liu Hong Wei
Published: February 2011

In turbulent business environment, executives’ cognition plays an important role in their understanding and the process of decision making. Cognitive map helps the senior executives in their thought process. The construction of information-based cognitive map, however, is a wicked problem, which could hardly be tackled by hard systems methodologies. Design science provides a good solution. This paper puts forward a research methodology, which is divided into six activities, to build up an information systems (IS) based cognitive map for cognitive decision support. The methodology is demonstrated by a case study of a Chinese steel company’s strategic decision making.
Optimal PID Control of Heat Exchanger Temperature
Authors: Yang Xing Hua , Liu Ting Rui , Sun Jing
Published: February 2011

To maintain the outlet temperature at the desired set-point, a high-order outlet temperature control model is established for a shell-and–tube heat exchanger, which is based on the analysis of its heat transfer process and dynamic properties .The Optimal PID control is applied to the temerature control system on the basis of this model, and the tuning parameters of the PID controller are obtained by numerical solving of a formulated optimization problem using Matlab/Simulink. An experimental control system is set up to testify the effect of the optimal PID control. The simulation result and the practice show that the control system has a favorable control performance.
Development Countermeasures of Chongqing Tourism E-Commerce
Authors: Zhang Yu Rong
Published: February 2011

In recent years, people pay more and more attention on E-commerce. Chongqing has abundant tourism resources and the rapid development of tourism E-commerce has brought new opportunities for Chongqing. However, at present, the development situation of Chongqing tourism E-commerce is not ideal now. There are many problems existing in Chongqing tourism E-commerce, such as the lower application level of tourism E-commerce , the lack of unified planning, the lag of “soft construction” and the poor sense of cooperation between tourism enterprises etc. Therefore, countermeasures were proposed in this paper from four aspects: chang tourists online consumption concept, strengthen the integration and supervisory work of Chongqing tourism E-commerce sites, strengthen talented person troop construction of the tourism E-commerce and strengthen laws and regulations construction of tourism E-commerce.
Calibration for Gas Flowmeter with Tracer Gas Dilution Method
Authors: Zeng Xian Yang , Chi Zuo He , Zheng Ming Guang
Published: February 2011

The principle of calibration for gas flowmeter with tracer gas dilution method is introduced, and experiments on calibration for gas flowmeter in a 0.300m internal diameter and 90 degree bent pipe are presented, which CO and air were selected as tracer gas and gas stream. The sampling points were downstream of the bend pipe around 9D (D is the internal diameter of pipe),12D and 15D, respectively. The results show that the radial and axial mixing between tracer gas and air have been uniformed downstream of the bend pipe at the sampling point of 12D and 15D when the flow rate above 3.2m/s, and the relative error of the flow rate calibration attains the level of 4.3%. The calibration accuracy depends on the tracer gas injection flow rate, tracer gas concentration at the sampling point, and the uniformity of tracer gas concentrations downstream at the sampling point. Calibration for gas flowmeter with tracer gas dilution method is feasible, and it provides a method for industrial gas flowmeter calibration in pipeline transportation.
Fast Multipole Virtual Boundary Element - Least Square Method for Solving 2-D Elastic Problems
Authors: Jiang Yan Tao , Chen Si Tian , Li Cheng Hua
Published: February 2011

In this paper, the fast multipole virtual boundary element - least square method (Fast Multipole VBE - LSM) is proposed and used to simulate 2-D elastic problems, which is based on the fast multipole method (FMM) and virtual boundary element - least square method (VBE - LSM).The main idea of the method is to change computational model by applying the FMM to conventional VBE - LSM. The memory and operations could be reduced to be of linear proportion to the degree of freedom (DOF) and large scale problems could be effectively solved on a common desktop with this method. Numerical results show that this method holds virtues of high feasibility, accuracy and efficiency. Moreover, the idea of this method can be generalized and extended in application.
A Study of Listening Training Materials for Chinese Colleges Students in Second Language Acquisition
Authors: Wu Chun Mei
Published: February 2011

In classroom, students do more listening than reading. Listening competence is “larger” than speaking. The significance of listening in second language acquisition can never be overestimated. Listening comprehension has been a focus for college English learning for years in China. With the information obtained from listening, learners build up their own linguistic system and are ready to retrieve whatever they want when they speak and write. There are many factors that affect listening, among which materials play a key role in facilitating listening comprehension. In order to achieve the final goal of promoting listening competence, teacher must realize that listening materials should be tailored to the needs of individuals. Based on the exploration of the nature of listening comprehension, this paper verifies the elements hindering learners’ listening competence on the basis of the need analysis and Krashen’s input hypothesis. With a questionnaire conducted at Wuhan Polytechnic University ，and the author accordingly concludes that a feasible materials should meet the learners’ requirements so that the enhancement of listening comprehension can be achievd.
Research on Multiform Circuit Multi-Carrier Transmitter in Smart Grid
Authors: Wang Wen Xing , Cao Xing Lin
Published: February 2011

Transmitter is one of the communications-equipment in modern industrial. The basic principles of the transmitter is described in this article at fist, and then the multi-carrier multiple smart grid electricity transmitter is proposed. The transmitter takes advantage of multi-carrier communication technology and more effective solution to solve measurement data transmission problems in smart grid. In the carrier module, the source information with high-rate is changed into low-rate parallel data streams, and then is modulated, the modulation signal is added and changed into transmitted signal, and each carrier can use different modulation. Low-speed data is demodulated by appropriate demodulation mode at the receiving end, and then original data stream is synthesized by parallel -to-serial conversion.
Application in DSP/FPGA Design of Matlab/Simulink
Authors: Liu Yong Mei , Guan Yong , Zhang Jie
Published: February 2011

As an off-line simulation tool, the modular modelling method of Matlab/Simulik has the features of high efficiency and visualization. In order to realize the fast design and the simulation of prototype systems, the new method of SignalWAVe/Simulink mix modelling is presented, and the Reed-Solomon codec encoder-decoder model is built. Reed-Solomon codec encoder-decoder model is simulated by Simulink. Farther, the C language program and model the .out executable file are created by SignalWAVe RTW Options module, which completes the hard ware co-simulation. The simulation result conforms to the theoretical analysis, thus it has proven the validity and the feasibility of this method.
An Algorithm and Characteristics Concerning a Sort of Orthogonal Ternary Matrix-Valued Frame Wavelet Packs
Authors: Guo Hong Lin , Wang Rong Qian
Published: February 2011

In this work, the notion of matrix-valued multiresolution analysis of space L2(Rn, Cs×s) is introduced. A method for constructing orthogonal matrix-valued ternary wavelet packs is developed and their properties are discussed by means of time-frequency analysis method, matrix theory and functional analysis method. Three orthogonality formulas concerning these wavelet packets are provided. Finally, new orthonormal wavelet pack bases of space L2(Rn, Cs×s) are obtained by constructing a series of subspaces of orthogonal matrix-valued wavelet packets.
Users' Fuzzy Cognition Knowledge Learning in Interactive Evolutionary Computation and its Application
Authors: Hao Guo Sheng , Zhao Xiang Jun , Huang Yong Qing
Published: February 2011

user in interactive evolutionary computation (IEC) has the characteristic of fuzzy cognition. Based on this, a method to learn users’ fuzzy cognition knowledge is given. The method includes the fuzzy expression of the basic elements of IEC such as search space, population, gene sense unit and so on. Then a method to increase the performance of IEC based on the knowledge of users’ fuzzy cognition is given. The above results enrich the researches of IEC users' cognition.
The Study about Parsing of RGG Grammar
Authors: Shi Zhi Yuan , Sun Yu Qiang , Gu Yu Wan , Ji Fu Quan , Du Jing Fen
Published: February 2011

Visualization is the main form of human-computer interaction. The grammar formal description of visual language opens and explores the s application cope and theoretical research field of grammar. At present, graph grammar describing visual language is one of the best the formal methods. In the paper, formal parsing method of RGG grammar is studied deeply, a parsing algorithm about RGG grammar is described, and its application on Petri net is discussed.
Development of Injection Mould Design System Based on UG
Authors: Guo Shu Jun , Sun Wen Lei , Ping Zong Bao , Pan Hong
Published: February 2011

The development process of specialization injection mould design system orienting the injection mould industry based on UG has been studied using related technologies of UG redevelopment for the market demand of more variety, more objective, high quality and short-term concerning the injection mould industry. This paper introduces the key technologies of system development, mainly including interface technologies of UG calls MFC dialog, technologies of parameter modeling and accessing to the database, then demonstrates the process of parameter modeling using this system with an example. The system helps the management for parts library and standard size parameters database of the injection mould, and can enhance the automation and intelligent process of injection mould design.
Optimization Design of Self-Excited Oscillation Cavity
Authors: Zhu Hong Jun , Qiu Bo Shi , Yang Xiao Lu , Jia Qing Kun
Published: February 2011

Along with the over exploitation of oil and gas resources, complicated reservoirs should be exploited in abominable environments. New drilling methods, drilling tools and drilling crafts for breaking rock are urgently needed. In drilling project, opening radial holes in the wall of self-excited oscillation cavity, more drilling fluid absorbed from annulus and more hydraulic energy could be obtained to break rock efficiently. Therefore, in this paper, self-increasing flux of cavity with different velocity in annulus, ratio of upper and lower nozzle diameters and diameter of aperture were simulated using CFD numerical method. Then flow fields in different aperture conditions and the best aperture parameter were obtained. Some references can be provided to actual drilling for further better jet breaking rock and improving drilling speed, which also have a good economic benefit.
Simulation Analysis of Hydraulic Jet Pump
Authors: Zhu Hong Jun , Qiu Bo Shi , Jia Qing Kun , Yang Xiao Lu
Published: February 2011

Hydraulic jet pump is one of the mixing-reaction equipments using high-speed jet for work force to deliver energy and mass of fluid. Many factors affect the efficiency of this pump, and the mechanism is very complex. The present work aims to study the influence of different hydraulic structures on the efficiency. Based on computational fluid dynamics, two-dimensional oil flow in hydraulic jet pump with different structural parameters (area ratio, throat length and spray distance) was simulated. Calculation results show that: area ratio determines the suction capacity, throat length determines the mixing efficiency, and spray distance determines the outlet pressure. Since numerical simulation method can reduce experimental expenses and design cycle, our approach may provide some references for safe design and engineering practice of hydraulic jet pump.
Application of SVM Based on Improved Quantum Particle Swarm Optimization in Bio-Mimetic Robotic Horse
Authors: Ren Yu Yan , Bao Jie , Sun Ming , Wang Hong Rui
Published: February 2011

Quantum principles is introduced in particle swarm optimization to optimize SVM, aiming that common optimization algorithms of SVM are easy to relapse into local extreme values and optimization result bad. Quantum particle swarm optimization can improve traverse property of particle, thus can overcome the limitation of local extreme values and optimize SVM well. Use the optimized SVM to control the motion of bio-mimetic robotic horse. And simulation results show that this algorithm can achieve the best control effect quickly and accurately.