bluuebunny/crossref_metadata_2025 huggingface dataset:
Automatic Frequency-Tracking Control for Ultrasound Welding System
Authors: Yarn Kao Feng , Wu King Kung , Ma Kai Hsing , Chang Wen Chung
Published: February 2011

A new frequency-tracking control method to catch the optimal working frequency for the high power ultrasonic welding system is proposed. In a high power ultrasonic resonant system, the induced high temperature will change the working frequency. Therefore, the proposed control method to track the optimal working frequency becomes very attractive and important. This control method is practically implemented by a FPGA chip which basically includes two logic circuits. One logic circuit is to find the optimal working frequency automatically and the other one is to adjust the working frequency by detecting the working current simultaneously. Experimental results exhibit the new method can effectively control and track frequency for high power ultrasonic welding system.
Synthesis of 20nm Colloidal Gold by Microwave Heating Method
Authors: Feng Jing Jing , Zhao Yang , Yang Xiang Yu , Zhao Hai Feng , Huang He
Published: February 2011

Colloidal gold immunochromatographic strip is a simple and convenient method for detecting harmful substances, such as Morphine and CLB. For the purpose of reducing sterically hinder and enhancing the measurement sensitivity, 20nm colloidal gold was choosed. Therefor, in this paper, the microwave heating method was improved to synthesize the 20nm collidal gold, the addtion of reductantan and the heating time were explored. We use transmission electron microscope and UV-vis spectroscope to character the size of series particles. The result showed that when 1ml reduces was added and the heating time was more than 2min, the gold particles were close to 20nm and much more uniform. In conclusion, the improved microwave method was more suitable for preparation of small diameter gold particles.
Ultrasonic Welding Driver with Class-E Inverter Design
Authors: Yarn Kao Feng , Wu King Kung , Ma Kai Hsing , Chang Wen Chung
Published: February 2011

A robust circuit design using matching technology to design the ultrasonic welding transducer driver with zero voltage switching is proposed. The feedback output voltage is used to control the oscillator frequency to achieve the self-tracking function. Experimental results exhibit that the Class-E inverter circuit can be effectively and stably applied on the high power ultrasonic welding system.
Study on Pavement Performance of Reclaimed Asphalt Mixture
Authors: Li Hao , Zhou Rui , Wang Xuan Cang
Published: February 2011

In order to improve the pavement performance of reclaimed asphalt mixture, using Marshall test, rutting test, splitting test and long-term aging test, taking stability, dynamic stability, fatigue strength, stiffness modulus, and freeze-thaw splitting tension strength as the target, the influence law of old asphalt mixture content and regenerant content on pavement performance of reclaimed asphalt mixture is systematically studied. The results show that: the proportion of old asphalt mixture has no influence on high temperature performance of reclaimed asphalt mixture. With the proportion of old mixture increases, the optimum asphalt-aggregate ratio, low temperature performance, water stability, and anti-aging property of reclaimed asphalt mixture decrease. Addition of regenerant improves the low temperature performance of reclaimed asphalt mixture, and reduces the strength and high temperature stability of reclaimed asphalt mixture. Research results have great guiding significance for old asphalt mixture content selection, regenerant content selection and improving pavement performance of reclaimed asphalt mixture.
The Influence of Different Product Process on the Effect Ingredient Content of Ningxia Lycium barbarum
Authors: Hu Yun Feng , Hu Han Yan , Jiang Chang Jie , Zhu Yan Hua , Wang Jian Ming
Published: February 2011

Lycium barbarum as raw materials, after press, enzymatic hydrolysis, separation and drying process to a series of different Lycium barbarum products, through determination of effective ingredients content, such as carotenoid, amino acid, crude protein, crude fat, tried to explore the influence of effective component on different processing methods. The result showed that after pressing, enzymatic hydrolysis, separation technology, a large number of carotenoid, amino acid was retained in original slurry, juice, clear juice only have little. The carotenoid content of freeze-drying fruit were lost obiously during the different course of drying, such as air-drying, mechanical-drying, freeze-drying. Spray drying can destroy crude protein and fat activity, but it can be used to improve free amino acid in Lycium barbarum.
Analysis and Research for Airplane Cockpit Sound’ICA Denoise Based on Blind Source Separation Principle
Authors: Cheng Dao Lai , Wang Qing Cheng , Yi Chui Jie , Yao Hong Yu
Published: February 2011

The characteristic of cockpit sound recorded by CVR is the key evidence in investigating accident causes for wrecked airplane. But many factors from inside and outside cockpit affects the analysis results, especially noise. And some analysis methods (such as FFT, WT, CZT, and so on) were impacted by internal and external environmental sound in aircraft cockpit. To solve the problems, further analysis and research for typical cockpit Sound’ ICA de-noising based on blind source separation principle. Firstly, the principle of de-noising analysis based on ICA are made in details ,including blind source separation and analysis of OGWE, maximum ratio of signal to noise of blind source separation algorithm; Then, process of cabin sound de-noising analysis based on ICA is done. Research indicates the de-noising of typical cockpit sounds is identical with the de-noising based on wavelet packet analysis in Matlab; more easy and reliable for the research and analysis of typical cockpit sound.
Bioinformatic Analysis and Characteristics of the Antigen SO7 of Eimeria Tenella MY Strain
Authors: Chen Xi Wen , Yin Miao , Wang Xiong Qing
Published: February 2011

Avian coccidiosis is an intestinal disease of chickens caused by several species of protozoan parasites within the genus Eimeria. The total cost of this disease has been estimated to be at least $ 3 billions per year to the worldwide poultry industry. In order to develop a new generation of vaccine which can provide a safer, more effective and cost-effective approach for avian coccidiosis control, bioinformatic and molecular approaches are used to predict and analyze the structures and functions of Eimeria antigens. In the present study, the information about structures and functions of the antigen SO7 of Eimeria tenella（E.tenella） MY strain was predicted using bioinformatics softwares and tools. The SO7 gene was predicted to encode a polypeptide of 216 amino acids with a putative molecular mass of 22.369 kDa , no transmembrane domain in the polypeptide and a predicted isoelectric point of 6.86. The acid sequence analysis showed that the potential antigenic epitopes are situated in 25-33, 84-91, 101-107,148-152, 157-162,193-200, and 206-212 amino acids. The results obtained from the present study may provide necessary data for further study of E.tenella SO7 and development of recombinant vaccines and epitope vaccines.
Numerical and Experimental Investigation of Bump Foil Forming Process for Foil Air Bearings
Authors: Duan Wen Bo , Geng Hai Peng , Yang Bai Song , Sun Yan Hua , Yu Lie
Published: February 2011

In this paper, a simplified nonlinear finite element for bump foil forming process of foil air bearings is developed. The bump foil is dealt with as flexible deformable body, the upper die and lower die are considered as the rigid body without deformation. The friction model between bump foil and dies with velocity-dependent friction forces is described by arctan function. The forming process of SS304 Stainless Steel bump foil under different loads is investigated with rigid-plastic finite element method. The simulation results are compared with theoretical values and experimental results. Therefore more feasible process parameters are obtained to fabricate the bump foils.
Control on Arc Source Device during Arc Ion Plating
Authors: Li Yan Zhe , Fan Duo Wang , Zhao Yang
Published: February 2011

A controller based on DSP (Digital signal processor) is built during Arc Ion Plating. The purpose of controller is to realize real-time and flexible control on Arc Source Device. It is shown that by using DSP, Arc Source Device can be controlled and protected online. As a result, not only can Arc Source Device change output current according to the order from upper monitor momentarily, but also the faulty or failed Arc Source Device can be isolated rapidly.
Condensing Property Researches for the Inorganic Heat Pipes Condenser
Authors: Zhang Li Xi , Zhou Shuai , Chen Wen Bin
Published: February 2011

Inorganic heat pipe is a new kind of heat transfer elements. To research the condensing characteristics of inorganic heat pipe condenser under negative pressure, the test-bed is established. In condenser design, traverse baffles are used to enhance steam velocity and steam disturbance to liquid film to strengthen heat transfer. Orifice connected to vacuum pump is fixed on the underpart of condenser to prolong steam flowing path and avoid steam loss caused by pump sucking. The relationship between water output and absolute pressure is a quadratic curve. The differences between testing water outputs and theoretical ones are analyzed. The research supplies a design basis for the inorganic heat pipes condenser used in low temperature distillation desalination unit.
Application of Normalized Difference Water Index for Vegetation Water Content Monitoring from MODIS Data
Authors: Ding Yi , Gong Hui Li
Published: February 2011

The needs for vegetation water content monitoring originates from forest fire assessment: Firstly, the vegetation water content affects the forest ignition point; secondly, it affects the spread rate if the forest is on fire. Based on the above reasons, the inversion of vegetation water content in Da Hinggan Ling region of China was studied, using the Normalized Difference Water Index from MODIS (Moderate resolution Imaging Spectroradiometer) data, the relationship between the water content of vegetation and forest fire risk was preliminary analyzed.
Genetic Algorithm Solution for a Member Selection Problem of Supply Chain Network
Authors: Yang Peng
Published: February 2011

This paper studies a member selection problem of a supply chain network consisting of many different projects, such as supply, manufacturing, distribution, and logistics. It first takes those different projects as a whole one, considers the principal-agent relationships among these enterprises and establishes models using the nonanalytical objective function. It also proposes a genetic algorithm to generate a relatively reasonable solution and validates it with an example.
Software Reconfiguration Based on Service Model-Driven Architecture over Cloud Computing
Authors: Zhu Xi Yong , Gu Shan Shan , Wang Shi Xiong
Published: February 2011

Cloud computing is changing the way enterprises develop and deploy information systems. With the rapid development and successful implementations of the model-driven architecure(MDA) and service-oriented architecture (SOA), clouding computing has become the focus of researches. This paper describes the design and implementation of a service template markup language (STML) and its integrated development tools, which provide a comprehensive solution to the reconfiguration of applications over cloud computing platforms. In the paper, we first analyze and point out the limitations of current software reconfiguration approaches, then propose a framework for a SMDA-based approach to software reconfiguration in a PaaS platform, next present a series of PaaS service models and an XML-based service template markup language, finally conclude by an example showing the practicability of the tools.
Dam Safety Analysis Based on Stepwise Regression Model
Authors: Hu De Xiu , Zhou Zhi Qi , Li Yong , Wu Xiao Long
Published: February 2011

The simulating and predicting analysis model is studied by the deformation monitoring data of Bikou earth-rockfill dam. Based on the least squares method of Statistics principles, the stepwise regression model has been established of earth-rockfill dam deformation displacement, which is used to fit and forecast the measured deformation data sequences of dam. The results shows that the deformation monitoring model of Bikou earth-rockfill dam having higher fitting precision, longer predict cycle, can be better applied to the fitting and prediction of dam deformation monitoring data.
Face Recognition Based on Wavelet Neural Network
Authors: Zhang Hong
Published: February 2011

It's well known that the technology of human face recognition has become a hot topicin pattern recognition field. Though a lot of progress has been made by many researchersthese years, many key problems still have to be solved in order to popularize the application of face recognition because of the complexity of face recognition. The background, development and main methods of face recognition are introducedfirstly in this paper, then a face recognition method which is based on wavelet transform,KL transform and BP neural networks is used in the paper.Here the face feature extraction includes wavelet transform and KL transform.Moreover,the recognition classifier is BP neural networks.The simulation testing in the paper holds good recognition rate.
Research on Semantic Retrieval System for the Document Knowledge Based on Domain Ontology
Authors: Liu Zi Yu , Zhang Dong Li , Li Xue Hui
Published: February 2011

Domain ontology can effectively organize the knowledge of that domain and make it easier to share and reuse. We can build domain ontology on thesaurus and thematic words and index document knowledge using domain ontology. Under which this paper designs a semantic retrieval system for the document knowledge based on domain ontology, and the system consists of four main components: ontology query, semantic precomputation for document and the concept similarity, semantic extended search and reasoning search. Finally, this paper makes an experiment on high-speed railway domain. The experimental results show that the developed semantic retrieval system can reach the satisfied recall and precision.
Research on the Capability of Survivability in Optical Network
Authors: Zhang Ning
Published: February 2011

Survivability is the capability of a network to maintain service continuity in the presence of faults within the network. In this paper, we presented the new survivability method and discussed the capability of survivability in optical network. The survivability in WDM networks is implemented using protectionand restorationtechniques. Protection is a static mechanism to protect against failure, where the resource for both the primary and the backup light-paths are reserved prior to the data communication. Restoration on the other hand, is a dynamic mechanism where the backup light-path is not set up until the failure occurs. Survivability using these techniques is usually provided to handle single link failures in the core network.
Research on New Routing Technology in WDM Network System
Authors: Zhang Ning , Ge Mao Chang
Published: February 2011

In this paper, a new routing design is presented. Interior gateway Protocols (IGPs), particularly Open Shortest Path First (OSPF), uses a simple single metric component, cost, which is based on the bandwidth of the link. Most large IP networks run Interior Gateway Protocols (IGPs) such as Open Shortest Path First (OSPF) or Intermediate System-Intermediate System (IS-IS) that select paths based on static link weights. Enhanced Interior Gateway Routing Protocol (EIGRP) is slightly more aware of the link characteristics in that it calculates a metric based on cumulative delay (delay is simply an arbitrary assigned value) and the minimum bandwidth value encountered between the source and destination. Routing technology can better the network operation efficiently.
Study of Intelligent Information System Based CAN Bus
Authors: Yao Zheng , Lou Guo Huan
Published: February 2011

In order to more rapidly and accurately diagnose the fault, the CAN bus was applied to system. In this article, an intelligent fault diagnosis method is presented for the diversity, uncertainty and complexity of device faults. The system can directly access self-test information and on-line test information, and information fusion technology, stator current and rotor vibration signals as a diagnostic characteristics input signal were introduced into the motor fault diagnosis. In accordance with the appropriate information, monitoring signs separately adopt a diagnosis sub-network to complete different aspects of fault diagnosis; diagnostic reasoning and drawing conclusions of fault diagnosis. Experiments show that this method is simple and effective. It can also be applied to other fault diagnosis of complex systems and has certain portability.
Towards Testing Web Applications: A PFSM-Based Approach
Authors: Qian Zhong Sheng , Miao Huai Kou
Published: February 2011

To ensure the quality of Web applications, Web testing is one of the effective methods. This paper proposes a Web usage model based on probable FSM (PFSM) which provides a way to derive the test cases for a Web application. The testing process is based on the idea that different parts of the Web application have different execution frequency. This testing method is a significant contribution to informed research.
Study on Tension Spring of Track Hydraulic Drill Rig
Authors: Qu Qing Wen , Wang Cheng Jun , Lou Xiao Dan
Published: February 2011

The intensity of the spring was adjusted with finite element method and the distributive laws of stress field and displacement field were obtained. Thus the maximum shear stress was got through the formula of spring intensity. So, two methods on analyzing the stress of cylinder spiral tension spring were introduced in this paper. One is the finite element method; the other is the formula of spring intensity. Then analyzing the spring deformation under load clarifies the function of the finite element method upon spring design, selection and strength check, and improves the reliability of spring design and shortens design time.
A Novel Model for Production Distribution Optimization and its Solution
Authors: Zhao Xi , Li Ying
Published: February 2011

A production distribution problem (PDP) with the third party logistics (3PL) is discussed in the present paper. Then, a PDP model is built as an extended type of vehicle routing problem (VRP), which is a classical model in logistics. The novel model can be transformed into the combination of generalized travelling salesman problem (GTSP) and TSP with constraints. Some characters about the existing solutions of PDP are discussed. As a result, a genetic algorithm for PDP is proposed. Finally the result of numerical simulation shows the feasibility and effectiveness of the new model.
The Multi-Point Initiation Technology Based on Piezoelectric High-Voltage Converter of an Electronic Security System
Authors: Xiao Hong Bing , Guo Pei Yuan
Published: February 2011

The multi-point initiation control technology of electronic security systems uses high-performance and high-pressure transformer, which gains efficient multiple high-pressure slapper ignition energy. Because of its small size, light weight, good high frequency performance characteristics of electronic security systems for the high-voltage transformation circuit, piezoelectric transformer provides a new solution. Firstly, the structure and working principle of electronic security systems based on piezoelectric pressure converter is discussed in this paper. By analyzing the high-voltage converter output circuit of the equivalent load of converter, the frequency characteristics of the charging process for the piezoelectric-driven frequency high-voltage converter is designed in theory. To improve the efficiency of its high-voltage charge, control circuits such as quantum-based control mode design is presented. At last, high-voltage converter of piezoelectric multi-point initiation of electronic security systems technology is given here.
Simulation and Training Platform for Self-Propelled Gun Based on Semi-Physical Simulation
Authors: Cao Li Jun , Hu Hui Bin , Qin Jun Qi , Cao Xin Wen
Published: February 2011

Aiming at the teaching and training requirements of new equipments, a new kind of military teaching and training paltform for follow-up system of Self-Propelled Gun is put forward. The demand analysis, development program, design of software system and hardware sytem are discussed in detail. The data flows and control processes indicate that this simulation and training platform simulates the mechnical and electrical procedures under semiautomatic and fully-automatic mode completely and vividly. Through operating board, various circumstances and targets can be setted according to training receiver and sujects. Fault setting, detection and maintenance are convenient and easy to observe. This platform has been used in new equipment’s teaching and training and shows good effectiveness.
High Torque NdFeB PM Motor Design for Cab Lifting Device
Authors: Shi Li Wei , Zhang Xue Yi
Published: February 2011

Based on the analysis of the automatic cab lifting devices, a permanent magnet motor was designed to drive the piston pump. With the analysis of three classes of permanent-magnet materials for electric motors, the NdFeB permanent-magnet materials was selected to output enough power for the motor. The dimensions of the magnet and the rotor were determined through theoretical calculation and analysis. NdFeB permanent magnet pump motor has some characteristic as follows: low failure rate, simple structure, high reliability, low noise, high power. It can improve the safety, comfort and manipulation convenience of heavy truck.
Efficient Scene Change Algorithm Based on Statistical Feature in the DCT Domain
Authors: Wang Jian Feng , Jiang Jian Min
Published: February 2011

In this paper, we propose an effective scene change detection algorithm directly in compressed domain. The proposed scene change algorithm(including abrupt change and ) test the n frame and n+1 frame through the extracting the feature of each frame. When extract the features of frame, two-dimensional statistical feature m1-s from DCT coefficients without its inverse transform was computed, Divide m1-s space into 42 unequal partitions (subspaces) and count the numbers pr within the 42 subspaces (entries) as the feature vector to judge the different of the two frames. locating scene changes is operated by comparison tests. In comparison with existing representative techniques, the experimental results show the superiority of the proposed method in terms of precision and processing speed.
A Study of Wheel Flange Partial Wear Problem of Heavy Haul Locomotive
Authors: Ma Wei Hua , Luo Shi Hui , Song Rong Rong
Published: February 2011

Aimed to wheel flange partial wear problem, the heavy haul train dynamic model was setup, and the coupler and buffer system was setup in detail. The dynamic performance of the train under the longitudinal coupler press force was simulated. The wheel/rail lateral force and wheel flange wear were analyses. Simulation results shown that the front locomotive will suffer a big longitudinal press force for the delay of the brake force transfer; this will lead the rotation of the coupler. The lateral force will apply to the car body at the position of coupler, which was caused by the longitudinal coupler force and the rotation angle of the coupler, then the wheel flange partial wear were induced as a result.
Sequential Circuit Equivalence Checking Method Based on Minimizing Automation
Authors: Gu Yu Wan , Shi Guo Dong , Xie Shi Yan , Sun Yu Qiang
Published: February 2011

A parallel checking method is proposed in the paper, in order to improve the speed of sequential circuit checking. The graph form of sequential circuits is isomorphic to finite state machine; a parallel sequential circuit equivalence checking method is designed using parallel minimization method of finite state machine. At last, the effectiveness and feasibility of the method is proved with an instance.
Preparation and Properties of Composite Photocatalyst of Needle ZnO Nanorod Grafted in the Pores of Expanded Graphite
Authors: Zhao Song Jian , Wang En Qiang , Zhu Min Cong , Ding Li Na , Zhang Ying Chen , Li Deng Xin
Published: February 2011

A composite photocatalyst of needle ZnO nanorod grafted in the pores of expanded graphite (EG) was prepared by a process of hydrolysis method directly, in which the expanded graphite was prepared by microwave irradiation. Scanning electron microscope (SEM) and Fourier transformation infrared spectroscope (FT-IR) were used to characterize the structure and the chemical structure of the photocatalyst. The results indicate that expanded graphite had a unique net-like pores structure and ZnO Nanorod was loaded on EG to form EG/ZnO composite photocatalyst.
TiO2 Nanotube Deposited in the Pores of Expanded Graphite by Microwave Irradiation
Authors: Wang En Qiang , Zhu Min Cong , Zhang Ying Chen , Li Deng Xin
Published: February 2011

We prepared a composite photocatalyst of Stick TiO2 nanorod loaded on expanded graphite(EG).The growth of TiO2 in the pores of EG by sol–gel method under normal temperature and pressure was investigated. Results sugest that pores of the EG which can load catalyst particles (TiO2 nanotube) is the physical base. Stick TiO2 nanorod can be well loaded on EG to form EG/TiO2 composite photocatalyst. So a unique process trying to load TiO2 photocatalyst on EG to EG/TiO2 composite photocatalyst was developed by us.
An Effective Genetic Algorithm for the Vehicle Routing Problem with Multiple Depots
Authors: Li Yun Yao , Liu Chang Shi
Published: February 2011

The vehicle routing problem with multiple depots was considered in this paper, and a genetic algorithm for the proposed problem was designed to minimize the vehicle number and total travel distance. Performances are compared with other heuristics recently published in the literature, the computational results show that the proposed approaches produce high quality results within a reasonable computing time.
Population Diversity Strategy in Gene Expression Programming
Authors: Zhang Yong Qiang , Xiao Jing
Published: February 2011

Population diversity is one of the most important factors that influence the convergence speed and evolution efficiency of gene expression programming (GEP) algorithm. In this paper, the population diversity strategy of GEP (GEP-PDS) is presented, inheriting the advantage of superior population producing strategy and various population strategy, to increase population average fitness and decrease generations, to make the population maintain diversification throughout the evolutionary process and avoid “premature” to ensure the convergence ability and evolution efficiency. The simulation experiments show that GEP-PDS can increase the population average fitness by 10% in function finding, and decrease the generations for convergence to the optimal solution by 30% or more compared with other improved GEP.
Anycast Routing Algorithm Based on Hybrid Strategy
Authors: Xue Jian Sheng , Wang Wei , Zhao Chen , Zhang Yu
Published: February 2011

To solve problem of the routing optimization and load balance in the selection of multimedia server,this paper is aimed to design an anycast routing algorithm based on hybrid strategy that combined ant colony optimazition algorithm with differential evolution algorithm,during the process of route discovery,considering not only the status of link,such as bandwidth,delay,but also introducing the server status,to discover a combination of the server and path which meet the requirement and achieve or near to the best.And then guiding the users’ request to the best server.
Fuzzy Support Vector Machines Control for Robotic Manipulator
Authors: Zhu De Quan , Mei Tao , Cao Cheng Mao
Published: February 2011

To improve the control precision of robotic manipulator, fuzzy support vector machines control method for robotic manipulator was presented based on genetic algorithm and least square algorithm. Fuzzy algorithm was used to decouple joints. Using support vector machines, fuzzy logical control of complete process and treatment of non-linear signal were realized. The parameters of controller were optimized by hybrid learning algorithm. First, least square algorithm was used for off-line optimization to form support vector machines control system. Then, genetic algorithm was used for on-line optimization to get the optimal performance parameters of support vector machines and the optimal fuzzy proportional parameters. Simulation results of a two-link manipulator demonstrated that the control method designed gets tracking effect with high precision.
Research on the Fouling Prediction Based on Hybrid Kernel Function Relevance Vector Machine
Authors: Sun Ling Fang , Xie Hong Gang , Qiao Li Hong
Published: February 2011

The research on the fouling prediction of heat exchanger is significantly to improve operational efficiency and economic benefits of the plants. Based on the relevance vector machine with Gaussian kernel function, polynomial kernel function and hybrid kernel function, simulation research on the fouling prediction was introduced. We construct a six-inputs and one-output network model according to the fouling monitor principle and parameters with MATLAB, all training data came from the Automatic Dynamic Simulator of Fouling and input the network after normalized processing and reclassification. Simulations show that the root mean square error of fouling prediction with hybrid kernel function is less than simple kernel function, and has the better prediction precision.
Training Algorithm of BP Networks Based on Improved Ant Colony Algorithm
Authors: Ren Yu Yan , Sun Ming , Bao Jie , Wang Hong Rui
Published: February 2011

This study proposes a new method to search optimal parameters of BP networks based on improved ant colony algorithm. The algorithm proposed that each ant searches only around the best solution of the previous iteration with, which can reduce search space fast. is proposed for improving the solution performance to reach global optimum fairly quickly. Simulation results indicate that optimize parameters of BP networks with this method can not only overcome the limitations both the slow convergence and the local extreme values by basic BP algorithm, but also improve the learning ability and generalization ability.
The Empirical Study of Listed Electric Power Companies’ Horizontal Merger with the Factor Analysis Model
Authors: Liu Chong Ming , Wang Lin
Published: February 2011

Merger and acquisition is currently the mainly way of power enterprise to pursue scale effect and improve competitiveness. So it is necessary to research the method to evaluate the merger effectiveness. In this paper, the common methods are analyzed, and a new factor analysis model based on the index-system-method is established. The comprehensive score gained from the model can stand for annual comprehensive performance of the merger company; then paired t-test the comprehensive scores of two different years; finally, whether the merger caused significant performance can be known.
Decomposition and Stability Analysis for Complex Systems with Dynamic Interconnections
Authors: Ouyang Xin Yu , Chen Xue Bo
Published: February 2011

A method to decompose dynamic complex systems is proposed, that is, by using the dynamic inclusion principle and permutation transformation, complex system with information constrains of dynamic topology structure is decomposed as a group of pair-wise decoupled subsystems in the expanded space. Then according to the Lyapunov method, the connective stability of pair-wise subsystems is discussed by constructing Lyapunov functions in the case all isolated systems are stable, the conditions of connective stability for the expanded system are obtained, which are also adapt to the original system based on inclusion principle. Finally, the theorem and deduction of connective stability for the dynamic interconnnected complex system are given.
Cold and Heat Source Energy-Saving Reconstruction for Central Air-Conditioning System in a Research and Development Center of Shanghai
Authors: Wang Jin , Xin Jing Jing , Zhou You Tao , Li Xin Lin , Li Shu Sheng
Published: February 2011

Central air-conditioning energy consumption accounts for a large proportion of the buildings. And cold and heat source energy consumption accounts for about two-thirds of central air-conditioning system. For a research and development center in Shanghai, because cold and heat source capacity largely surpasses the actual demand, we propose to combine with cold sources of the two buildings. We call it "two-in-one" reconstruction. When cooling load is small, we use cold source in one building to support the two buildings. After implementation, by return on investment analysis, the average electric energy-saving rate is 9.6%. Investment can be recovered within one year.
Strength Analysis on Crankshaft Structure Parameters
Authors: Chi Tao , Wang Zhong Fu
Published: February 2011

In order to evaluate the impact of crankshaft structure parameters on the transition strength of main journal and crank arm, this paper takes the crankshaft of V8 engine as the research object, using the finite element method to analyze, and then processing the experimental results with orthogonal experimental method throughout the experimental design, with the crankshaft parameters’ significant analysis of the crank arm overlap degree, main journal diameter, main journal length, crank pin diameter, crank pin length, etc, to obtain their impacts on the strength, and provide the instructive recommendations of crankshaft design and optimization.
Servo System Compound Control Based on SMC
Authors: Wang Shu Fang , Yang Zhi Yong , Zhao Lin Hui
Published: February 2011

It is difficult to fulfill effective control since nonlinear and uncertain factors for an antenna servo system. In this paper, a compound sliding-mode control strategy is proposed. In order to control servo system effectively, depart it into two parts. One is reference model without considering disturb and uncertain, the other is real model including disturb and uncertain. To one part, choose reasonable sliding surface and design controller law. To another part, RBF neural network is taken in order to acquire upper bound of uncertain. Simulation and experiment results show the effect of control scheme.
Empirical Research on China's Regional Economic Distribution and Characteristics
Authors: Lu Xiao Guang , Zhu Jian Qun , Fan Meng Ying
Published: February 2011

According to the second economic census data of Jiangsu Province, this paper firstly uses PCA-HCA model based on provincial cities data to classify economic regions. And then, it uses BLR-HCA model to reclassify the economic regions based on counties data. Finally, it comes to the conclusion that the past regional classification ways of Jiangsu Province need to be updated. The research on regional economy is dynamic and timely, while deepening the division of labor and finance is an effective way to develop Jiangsu’s regional economy.
An SIS Epidemic Model with Feedback Mechanism in Scale-Free Networks
Authors: Gong Guang Wu , Zhang Da Min
Published: February 2011

A new susceptible-infected-susceptible model with feedback mechanism is proposed. The dynamic behavior of the epidemic model with feedback mechanism in scale-free networks is researched by theoretical analysis and computer simulation. The results show that feedback mechanism can reduce the stable infective ratio of system; however, it can not influence the epidemic threshold of system. The results can help us to understand rightly epidemic spreading process in reality networks and guide people to design effective epidemic preventive and controlling measures when epidemic outbreaks.
Moving Vehicles Detection Based on Pair Edge Difference and Background Subtraction
Authors: Cui Yu Yong , Zeng Zhi Yuan , Cui Wei Hong , Fu Bi Tao , Liu Wei
Published: February 2011

This paper describes a method based on the pair edge difference and background subtraction to detect the moving vehicles, The presented method consists of three procedures, using CANNY detector to refine the frame pair edge information, then get -1 and 1 from a edge difference between two continuous frame, thirdly, the background subtraction is used to detect the moving vehicles, at last, if -1 and 1 can pair and the background subtraction edge information 1 ,the moving vehicles are detected. Experiments show our method is useful and has a good result.
Extraction Axis of Three-Dimensional Blood Vessel Images Based on Energy Constraint Equation
Authors: Wang Yong Sheng , Li Jun Li , Chen Shuang
Published: February 2011

Extracting axis of 3D blood vessel images is very important and useful to quantify blood vessel in medical diagnosis. According to blood vessel features, we constructed the energy constraint equation of blood vessel. The initial skeleton curve of blood vessel images obtained by thinning algorithm dynastically converges to the position of the axis under energy constraint equation and along gradient direction of the distance field of blood vessel images. When the equation energy reaches a minimum value, the initial skeleton curve also fixes in the axis position at this time. Experimental results show that the position of the blood vessels axis extracted by this method is accurate, and the axis preserves topology and connectivity.
Analyzing Abutment Safety Degree of Slope Based on Dynamic Quasi Continuous Model
Authors: Song Zhan Ping , Chen Fei Xiong , Wang Jun Xiang
Published: February 2011

Aiming at the complexity of high arc dam, and the limitation of conventional methods static and rigid body hypotheses of conventional slope stability analysis, which bring great difference with true engineering state. The paper proposed a concept of “abutment safety degree” considering the affection of dam body, and developed the model including dynamic contact element reflecting local rock crack and quasi continuous medium reflecting large deform. Based on above model, combing with 3D element strength reduction method and strain control criterion, the resist safety degree calculation method for dam shoulder high slope of high arc dam system has been constructed, which can fit the complex geo-mechanical engineering. Finally, the method is used in the dam shoulder slope analysis of Xiaowan arc dam system with height of 300m, the result is satisfied, the calculated safety degree is decreasing 20% to the result of conventional method. The method provides a powerful way to the safety evaluation of complex engineering.
The Study of Ontology Reasoning to Semantic Web
Authors: Cheng Xian Yi , Yang Ai Qin , Cheng Xue Yun
Published: February 2011

The next generation Web, Semantic Web, has recently been drawn considerable attention from both academia and industry. The ontology is regarded as the cornerstone of the Semantic Web, is playing an important role with the knowledge expression and knowledge reasoning. Ontology language, Description Logic and the relationships of them were presented. This paper analyzes the principle of semantic reasoning about DL and reasoning machine. Finally, performers testify the practical reasoning task about a concrete Ontology construction.
The Applications of Description Logics in Natural Language Processing
Authors: Cheng Xian Yi , Cheng Chen , Zhu Qian
Published: February 2011

As a sort of formalizing tool of knowledge representation, Description Logics have been successfully applied in Information System, Software Engineering and Natural Language processing and so on. Description Logics also play a key role in text representation, Natural Language semantic interpretation and language ontology description. Description Logics have been logical basis of OWL which is an ontology language that is recommended by W3C. This paper discusses the description logic basic ideas under vocabulary semantic, context meaning, domain knowledge and background knowledge.
Model of Vehicular Movement in Simulation of Vehicular Ad Hoc Networks
Authors: Zhang Li Cui , Xu Xu , Wang Zhi Gang , Xiao Ping , Xu Xiao Fei
Published: February 2011

Currently, the research on Vehicular Ad hoc Networks(VANETs) is hot. Vehicular movement model is an important factor, which affects the simulation results of VANETs. In the simulation of VANETs, Vehicular movement model used in the urban environment should consider not only the characteristics of the vehicular movement, but also the role of obstructing the radio waves. In this paper, after a detailed analysis of vehicle motion features, it gives a vehicular movement model based on directed graph. The simulation shows that the model can well reflect the movement of vehicles in the real world, and the influence of urban environment on the network performance.
Unbiased H∞ Infinite Filtering for Stochastic Systems with Data Packet Losses
Authors: Li Yu Mei , Zhao Bin , Guan Xin Ping
Published: February 2011

This paper presents the unbiased H∞ filter design for stochastic systems with data packet losses. By constructing unbiased filter, the complexity and computational burden of the real-time filtering process are reduced greatly. Delay-dependent sufficient conditions for stochastic system with data packet losses are proposed in terms of linear matrix inequalities (LMIs). Numerical example demonstrates the proposed approaches are effective.
Analysis of Initial Stress Anchor Wire Anchoring Mechanism and its Parameter Optimization
Authors: Zhang Yan Bo , Kang Zhi Qiang , Wang Ying Chun
Published: February 2011

Initial stress anchor wire anchoring technology has the merits of fast speed, small perturbation and economic when healing unstable rock side slope. Choosing the spacing, position, angle of reinforcement anchor wire plays a vital role in reinforcement stability and economy. The landslide of an open pit was elected as project background in this paper. Operation model was set up by Lagrange arithmetic which analyzed the reinforcement mechanic and broken pattern of anchor wire. And it defined that the optima spacing is 8m. The anchor wire reinforcement angle and institution position research were researched by using limit balance theory. The optimum design angle obtained is -20°~20°, and the optimum institution position is in the range of 1/5~1/2 of the lower reinforcement side slope height.
Parameters Selection and Application of LS-SVM Based on Chaotic Ant Swarm Algorithm
Authors: Xie Chun Li , Zhao Dan Dan , Wang Juan , Shao Cheng
Published: February 2011

Parameters selection plays an important role for the performance of least squares support vector machines (LS-SVM). In this paper, a novel parameters selection method for LS-SVM is presented based on chaotic ant swarm (CAS) algorithm. Using this method, the optimization model is established, within which the fitness function is the mean square error (MSE) index, and the constraints are the ranges of the designing parameters. The proposed method is used in the identification for inverse model of the nonlinear systems, and simulation results are given to show the efficiency.
Multicast Model for Broadband Multimedia Satellites over ATM Networks
Authors: Guan Ming Xiang , Xing Yun Feng , Wan Xue Yuan
Published: February 2011

Multicast delivery has become more and more important in modern multimedia applications for broadband satellites over ATM networks. Multimedia integrates texts, audios, videos and still images in a variety of applications. The data in this media can be time critical in terms of maximum delay and delay jitter. In order to satisfy all these applications, the network needs to have an efficient multicasting mechanism using the true capability of ATM networks. In this paper, a bi-directional multipoint-to-multipoint multicast model was proposed for broadband multimedia satellites over ATM networks, which uses a single tree for a multicast group consisting of multiple participants that are either senders, receivers, or a mix of both. We first discuss why the resequencer model will not be suitable for multimedia traffics, then propose the model to solve the problems. The mean queueing delays of our model are not sensitive to mean size of the data packet while the mean queueing delays and of the resequencer model are very sensitive to mean size of the data packet.
A Novel Carrier Acquisition for HAPS Communication System in High Dynamic Scenario
Authors: Guan Ming Xiang , Wan Xue Yuan , Wang Le
Published: February 2011

To detect and receive the high dynamic and high information-rate signal for communication platform in the stratosphere, it is necessary to design digital system to acquire and track the carrier. In the high dynamic and high information-rate situation, the most important aspect is the great influence of Doppler frequency shift and high information rate on the carrier acquisition and track. Carrier acquisition and track in the high dynamic and high information-rate situation was implemented by means of the combination of FPGA and frequency, phase lock loop. A new algorithm using DQPSK for carrier acquisition and track was proposed and the validity of the design and algorithm was proved by means of trials and comparison with EKF method in the high dynamic and high information-rate situation.
Research on Software-Hardware Co-Design of Reconfigurable CNC System
Authors: Wang Tao , Wang Li Wen , Liu Qing Jian
Published: February 2011

The reconfiguration technology of CNC system is divided into two interactive levels: hardware system reconfiguration and software system reconfiguration. The hardware system reconfiguration is based on a rapid field programming of Field which is performed with different FPGA configuration files. Meanwhile, software system reconfiguration is conducted through design, modification, selection and configuration of different databases on a guiding software reconfiguration development platform. Then, the software-hardware co-design of the system reconfiguration is discussed. Finally, an application case of aforementioned reconfiguration methods is given. A CNC system with 5 synchronously moveable axes in total 8 stepping axes is reconfigured successfully from the existing CNC system with 3 synchronously moveable axes in 4 ones.
Empirical Study on Ordering Policy for Multi-Products in Fresh Food Supply Chains
Authors: Huang Yin , Li Xia Miao , Liu Da Peng
Published: February 2011

Food supply chain is a complex process. The author develops a model that will provide both researchers and practitioners with a means of determining the optimal ordering policy for multi-products in fresh food supply chain. By using computer simulation. this paper conduct for a numerical analysis to the ordering policy of products of a food company in Hubei province to analyze the properties of total cost functions under each of the six different ordering policies and proposes an approximate optimal ordering policy of multiple products. Based on the models and analysis, it is found that agglomeration effect plays an important role in determine ordering policy of multiple products.
Smart Antenna Adaptive Interference Suppression in TD-SCDMA System
Authors: He Hong , Wu Cong Cong , Li Hang , Yang Tong , He Lin , He Ying
Published: February 2011

The Smart Antenna which can adaptively track the user signals plays an important role in reducing the interferences among users in TD-SCDMA. This paper focuses on the study of the smart antenna adaptive beam-forming algorithm and aims at realizing the design and emulation of it by using the least mean square algorithm (LMS) and the recursive least squares algorithm (RLS). And by the comparison and analysis of the result, we want to learn its effectiveness in reducing the interferences in TD-SCDMA system.