bluuebunny/crossref_metadata_2025 huggingface dataset:
Stability Analysis of Switched Systems with Mixed Delayed and Nonlinear Perturbations
Authors: Ding Xiu Yong , Shu Lan , Liu Xiu
Published: March 2011

This note deals with a class of switched systems with nonlinear perturbations in mixed delayed state. Based on the multiple functional appoach, we establish a delay dependent stability condition via designing appropriate switching rule. This result indicates that if the norm of system matrices is small enough, the uniform asymptotic stability is always achieved.
Temperature and Strain Rate Dependence of Deformation Microstructures of AZ31 Magnesium Alloy under Uniaxial Tension
Authors: Deng Wan Peng , Gao Zhan Feng , Li Xiao Wu
Published: March 2011

The tensile deformation microstructures of an extruded AZ31 Mg alloy were examined at temperatures ranging from room temperature to 250°C over a strain rate range from 10-4 s-1 to 10-2 s-1. It is found that the strain rate has an enhanced effect on the tensile flow behavior of AZ31 Mg alloy with increasing temperature, which is closely related to the changes of deformation microstructures. The tensile deformation of AZ31 Mg alloy is mainly accommodated by twinning and slipping at room temperature and 100°C, and the amount of deformation twins reduces with increasing temperature and decreasing strain rate. However, discontinuous dynamic recrystallization (DRX) occurs primarily at grain boundaries, and nearly no deformation twins form, as the temperature is as high as 250°C. With decreasing strain rate, more significant DRX takes place with an increasing DRX grain size. The tensile deformation of AZ31 Mg alloy at 250°C is thus primarily controlled by slipping and DRX.
Thermal Stability of Graphite/Copper Nanocrystalline Composite Powders Prepared by High Energy Mechanical Milling
Authors: Jin Yong Ping , Hu Ming
Published: March 2011

To provide reference for choosing technological parameters of subsequent powder densification, thermal stability of 3 h-milled 3 wt% graphite/copper nanocrystalline composite powders were investigated with such analytical methods as scanning electron microscopy (SEM), back-scattered electron images and X-ray diffraction (XRD). The results show that diffraction peak of graphite in XRD pattern is absent because of too small graphite particle. No major variation of grain size of Cu with annealing temperature is observed. Accumulation and growth of graphite phase aren’t seen. The microhardness is nearly constant for the annealed powders. Therefore, 3 h-milled 3 wt% graphite/copper nanocrystalline composite powders possess good thermal stability.
Influence of Extrusion Ratio on Forming of Thick-Walled Tube
Authors: Zhang Jian , Song Jian Hua , Wang Xiao Lan , Jin Xue Qin , Wang Zhi Hua
Published: March 2011

Employed DEFORM software to simulate vertical extrusion of large diameter thick-walled pipe, by using the Finite Element Method in the three-dimensional modeling software Pro/E of the CAD platform. Analyze the law of blank flow in extrusion process, distribution of stress and strain, and the influence of different extrusion ratio on deformation of thick-walled tube comparatively.
Relation between 3 Dimension Interface Topography and Residual Stress in Thermal Barrier Coatings
Authors: Han Zhi Yong , Wang Huan
Published: March 2011

Considering the difference of 3 dimension interface topography unit, the distribution of residual stress in thermal barrier coating was calculated using ABAQUS soft by finite element method. The calculating result shows that the residual stress is affected by interface topography unit obviously. Compressive stress exists in concave topography unit and tensile stress in convex topography unit. Stress concentrates in boundary of topography unit and reaches maximal value at the lowest and the highest place of concave and convex topography respectively. Compressive and tensile stress change with the size of topography unit distinctly.
Debt Financing, Corporate Governance and Overinvestment
Authors: Zhu Lei , Tang Bei
Published: March 2011

This paper examines the impact of debt financing on overinvestment in Chinese listed companies. Using an accounting-based framework to measure over-investment and free cash flow, we find evidence that, debt financing can’t mitigate overinvestment in Chinese listed manufacturing companies. Further tests examine whether firm’s governance structures are associated with overinvestment. The evidence suggests that governance factors also can’t mitigate over-investment in China. Reasons lie that hard constraint of debt financing doesn’t play its role in China. There also exists assets maturity and debt maturity mismatching problems in Chinese manufacturing listed companies.
Analysis and Application of a Kind of Hierarchical Fuzzy Systems
Authors: Wang Jie , Zhu Xiao Dong
Published: March 2011

In this paper a kind of hierarchical fuzzy systems was introduced. The characteristics and structural relation of this hierarchical fuzzy system were analyzed. The sensitivity between the input variables and the output variables and the position of variables in the hierarchical fuzzy system were given according to the importance of variables. The weight coefficient of variables was confirmed applying the methods of analytic hierarchical process (AHP). Then the structural analysis and the weight coefficient were applied to the forewarning system of oil drilling.
Based on Transcad of the Shortest Path Assignment Method
Authors: Li Qing Yin , Tang Rui , Tan Zhang Lu
Published: March 2011

Based on the Transcad all-or-nothing assignment model is a kind of static method; do not consider the travel time will be affected by traffic flow. The insufficient is that it does not conform to reality. In order to solve the all-or-nothing assignment model that to putting all of traffic flow on the shortest path, the text through the defining of the effective path and the traffic flow of the effective path to improve all-or-nothing assignment model. So the other road traffic flow can also assign and the results can reflect the assignment of urban traffic directly. It can be used to study the dynamic traffic assignment and traffic simulation analysis.
Structural Analysis and Optimization of Aluminum Triple-Bubble Cabin
Authors: Zhang Yong Jie , Tao Peng
Published: March 2011

Based on 150 seats BWB civil aircraft, an aluminum triple-bubble cabin model are built. By large deformation analysis, the triple-bubble cabin is indicated the bending stress theory of non-cylindrical fuselage in the internal pressure. Zero-order parameter optimization arithmetic is employed to optimize the sizes of skin, stringers, beams and ribs in the triple-bubble cabin. By restricting the maximum stress and deformation, a light triple-bubble cabin configuration is obtained. The structural analysis method on the aluminum triple-bubble cabin is reliable and applicable.
The Research on the EC Individual Credibility Based on Linear Discriminant Analytic Hierarchy Process
Authors: Yang Zun Qi , Lin Hai
Published: March 2011

The paper gives the linear discriminant function (LDF) based on the theory of linear discriminant analysis (LDA) combined with computing weights of the different indicators by analytic hierarchy process (AHP) to predict a new e-commerce customer’s individual credibility level and analyzes the result of a simulation test to justify the theory in this research.
MRF Absorber Damping Control for Building Structural Vibration Response by Means of Genetic Optimum Algorithm
Authors: Li Lian Jin
Published: March 2011

A similar structure model has proposed for three-storey building structure based on similarity theory, thus differential equations are established for the 4-DOF vibration system. According to the vibration characteristics of resultant structures, the mass, stiffness and damping coefficient are obtained by using genetic optimum algorithm, and then an MRF absorber has been designed and fabricated based on the optimized absorber parameters obtained. Furthermore, a set of semi-active vibration control testing system for building structures is designed and a pilot study on the damping effect of the MRF absorber has been performed. By adjusting the shock absorber damping force, inertia force and movement frequency synchronously against the external excitation force, the installed MRF absorber could significantly reduce the vibration amplitude of the considered building structure, clearly evidencing the damping effect of the MRF absorber.
Implementation of Agile Supply Chain Information Integration System in Manufacturing Industry Based on Service-Oriented Architecture and Web Service
Authors: Zhang Wei , Xu Yan
Published: March 2011

Construction of agile supply chain enables enterprises to share their process, application and data in different regions, different computing environments and different applied systems. We studied data flow between enterprises in steel manufacturing industry supply chain and made analysis of supply chain nodes, data transfer and interactive process then put forward key services that need to be provided between different nodes, identified service agents and established inter-service interaction model .Finally, we implement the agile supply chain information integration system in manufacturing industry based on service-oriented architecture and web service ,which provides interfaces of the standard data structures and communication methods between manufacturers and external systems. Test data demonstrate that this solution makes the information exchange between systems of enterprises easier, flexible and extensible.
A Sub-Pixel Localization Algorithm on the Basis of Gauss Curve Fitting in Gradient Direction
Authors: Zhao Ni , Fu Chun Xian
Published: March 2011

The most important thing of the detection system is the locating accuray of the pattern edge. With respect to the conventional sub-pixel localizaton algorithm and the irregular edge of the target image, a Gauss curve fitting edge localization algorithm in gradient direction is presented based on the Sobel operator and the usual curve fitting edge localization algorithm; according to a gradient distribution of a target image, a Gauss curve is used to fit defected edges so as to realize sub-pixel location of the edges. Experiments demonstrate that the proposed method is rightness and effectiveness, can obviously improve the accuracy of edge localization and target recognition.
Joint Detection Algorithm in Downlink for TD-SCDMA Trunking System
Authors: Shen Xiao Xiang , Zhi Hui , Shao Shi Xiang
Published: March 2011

CDMA system is the interference-restricted system, In the TD-SCDMA trunking system, using more than one scrambling in a cell introduces multiple access interference (MAI).This paper analyzes improving the performance of MMSE and PIC Detectors in TD-SCDMA trunking system with different level MAI. It can be seen from the simulation result, the joint detection algorithm can improve the performance of downlink for TD-SCDMA trunking system, and it also can help to keep the stability of this system.
Modeling and Simulation of PHEV Regenerative Braking Test Platform
Authors: Zhang Jing Ming , Cui Shuang Shuang , Ren You Cun
Published: March 2011

In order to recycle regenerative braking energy, we built the PHEV regenerative braking test platform with model design concept, based on the parallel hybrid structure. We proposed a regenerative braking control strategy under parallel braking force distribution, and established the mathematical models for main elements of the platform. In order to confirm the performance and the operational reliability of the platform, simulation models of the regenerative braking system were built in MATLAB/Simulink by combining the test data with mathematic models. We chose universal NEDC drive cycles for simulation, and the results indicated that the regenerative braking energy was effectively recycled. The structure and control strategy of regenerative braking test platform was proved to be rational.
Prediction for Air-Bending Springback Radius of Sheet Metal Using Back Propagation Neural Network and Micro Genetic Algorithm
Authors: Fu Ze Min , Liu Guang Ming
Published: March 2011

Springback radius is a very important factor to influence the quality of sheet metal air-bending forming. Accurate prediction of springback radius is essential for the design of air-bending tools. In this paper, a three-layer back propagation neural network (BPNN), integrated with micro genetic algorithm (MGA), is proposed to solve the problem of springback radius. A micro genetic algorithm is used for minimizing the error between the predictive value and the experimental one. Based on air-bending experiment, the prediction model of springback radius is developed by using the integrated neural network. The results show that more accurate prediction of springback radius can be obtained with the MGA-BPNN model. It can be taken as a valuable tool for air-bending forming of sheet metal.
Reseach on Distributed Material Requirements Planning Based on Distributed Decision Support Systems
Authors: Sheng Yu Kui , Lan Wan Lian
Published: March 2011

Distributed Material Requirements Planning is widely used in manufacture enterprise. The decentralized decisions of purchasing and warehousing can be coordinated by Distributed Decision Support Systems. Distributed Decision Support Systems can improve flexibility to make right decision instantly.
Installing and Debugging Skills of Satellite Television Receiving System
Authors: Wang Feng Ming , Zhang Zhan Xin , Li Rui Qiang
Published: March 2011

A brief introduction to the component of satellite television receiving system and qualitative analysis of the various factors that influence satellite signal. The emphasis is to illustrate different methods and techniques about adjusting an antenna when receiving signal with an analog receiver and a digital signal receiver.
A Multiple-Objective Algorism Design and Strategy Study Based on Target Space Partitioning
Authors: Shang Zhao Xia , Liu Hong
Published: March 2011

This paper proposed a multiple-objective algorism based on target space partitioning and demonstrated its evolution and optimization. The result showed that this algorism is effective in keeping the even distribution and convergence of the solutions. This paper also proposed an innovative design idea for algorism computation – the concept of tolerance is introduced and by adopting the double-population storage mechanism, the algorism's overall optimization capability is improved.
Developing the Balanced Scorecard Strategies for Vocational College Library
Authors: Hsieh Ling Feng , Wu Mu Chen , Chin Jiung Bin
Published: March 2011

This study attempts to comprehend the influence on vocational college library in Taiwan through the four structural dimensions of the balanced scorecard on financial perspective, customer perspective, internal process perspective, and learning and growth perspective, and investigate them further and thoroughly. Based on the author’s fifteen-years working experience on vocational college library, this paper provides management strategies to assist vocational college library in enhancing performance of library service, and expect to create a new vision for future development of vocational college library in Taiwan.
Assessment Analysis of Financial Stability in Central China Considering the Asset Bubble Situation — Based on the Empirical Analysis of Financial Sector in Hubei Province
Authors: Hu Li Qin , Tang Lu Qiao , Chen Rui
Published: March 2011

Financial stability has become the world focus. Considering the imbalance of regional economic development and the unique economic features of the central region, this paper analyzes the assessment of financial stability in central region. Taking financial sector in Hubei as an example, we measure the regional financial stability condition after removing asset bubbles by introducing the concept of asset bubble, contingent balance sheet. The empirical result turns out to be greater market value fluctuations of the financial sector, and in general, the actual risk of asset structure in Hubei financial sector is relatively low. However, in terms of trend, the obvious increase of asset liability ratio is coherent to the stability assessment of financial department, during the financial crisis in 2008.
The Construction of the Enterprise Culture after Financial Crisis
Authors: Wang Yue Fen , Zhao Mei Hui
Published: March 2011

Financial crisis reflects that the value of enterprise is the key to lead the development of the enterprise. Combining with the vacancy of the enterprise culture, insufficient innovation of the Enterprise culture, and ineffective measures of the enterprise culture construction, and so on, this paper comes up with some countermeasures such as the enterprise should correct understanding of the enterprise culture, strengthen the construction of enterprise’s learning organization, fully exert the entrepreneurial spirit of enterprise leaders so as to improve the competitiveness and the ability of dealing with the crisis.
An Effective Mutual Authentication Scheme for Hierarchical Mobile IP
Authors: Liu Chang Hua , Ren Xiu Qing
Published: March 2011

In order to improve the efficiency and security of the authentication for Hierarchical Mobile IP protocol, we propose a novel authentication scheme, which introduced identity signature and digital envelope to authenticate the sender and receiver of the registration packet. Theoretically prove that the scheme is an effective mutual authentication scheme, and improve the security and resist security attacks.
Product Information Forecast Based on B-P Neural Network
Authors: Xie Wei Cheng , Li Ling Ling , He Zi Yang , Chen Chang Min
Published: March 2011

According to the fast increase of Information data and continuous enhancement of people’s requirement for analyze of information, it is more and more difficult to get requisite information to judgment and decision-making. For solving these problems, the design of an intelligent forecast system based on back propagation neural network is introduced. And the framework, data processing and arithmetic of the system are presented. By continuously running program debugging and optimization settings to modify the parameters, the predicted results and actual test results is to be closer.
A Topology Based on a Local World Evolving Model for PSO
Authors: Ni Jia Cheng , Li Li , Qiao Fei
Published: March 2011

In this paper, we proposed a LW-PSO (PSO using a local world evolving model) by combining a local world evolving model with the “survival of the fittest” evolution mechanism. The concept of population structural entropy, a new diversity measure is defined and used to control the evolution process of the population topology of LW-PSO so the balance between the exploration and exploitation can be preserved during the population evolution. The experimental results show that LW-PSO can outperform the standard PSO with the lbest topology and the gbest topology especially in the multimodal problems and the extra time cost is negligible.
An Overview of Human-Computer Interaction Based on the Camera for Disabled People
Authors: Gao Guo Wei , Duan Xin Yu
Published: March 2011

In spite of the growing focus on human-computer interaction design promoted by researchers and practitioners, there remains a large user population that is generally overlooked: people with physical disabilities. Most of HCI of disabled require wearing extra instruments, the HCI based on the camera is easy, efficient and comfortable. In this paper, we combined the applied and basic research, both drawing from psychological research and contributing new ideas to compare some HCI based on camera. We discuss user and products, and technology, highlighting challenges, open issues, and emerging applications for HCI based on camera of disabled.
Automatic MRI Brain Tumor Segmentation System Based on Localizing Active Contour Models
Authors: Wang Ying , Lin Zhi Xian , Cao Jian Guo , Li Mao Qing
Published: March 2011

In this paper, an automatic segmentation system was developed for MRI brain tumor. Local region-based active contour models were suitable for heterogeneous features of brain MRI image. But the models are sensitive to initial contour, which generally requires manual setting. An automatic MRI brain tumor segmentation system were developed based on localized contour models, which can identify tumor-dominant slice, set initial contour automatically and segment tumor’s contours from all MRI slices autonomously. K-means clustering and grayscale analysis were combined to identify tumor-dominant slice. Multi-threshold algorithm with the aid of erosion and dilation operators was adopted to obtain an initial contour for the tumor-dominant slice. The segmentation contour from the local active contour models was applied as initial contours of two-side neighboring slices. MRI brain tumor data were applied to validate the automatic segmentation system.
Design of Intelligent Supervision System for Production Safety in Mine Areas
Authors: Zhuang Cheng , Fu Chang Qing , Zhuang Si Ming
Published: March 2011

Based on investigation into available monitoring and control system technology at home and abroad, this paper presents extensive surveys and thorough analysis of the safety supervision system being employed in Chinese coal mines. Taking a mine area as example and according to years of working experience in technical management of coal mines, the author combines the status quo of the mine area and existing problems in the supervision system for production safety in Chinese coal mines, and provides a design proposal of supervision system for production safety in coal mines, where a digitalized supervision system for production safety in coal mines serving dual-function of supervising production safety and commanding accident rescue is designed.
Damping Controller Based on Output Prediction Observer and LMI Method
Authors: Luo Ke , Yu Hai Ying
Published: March 2011

To damp the inter-area low-frequency oscillation in power systems, a wide-area damping supplementary inter-area controller, based on output prediction observer and LMI method, was designed in this paper. Simulation results of a test system show that the wide-area damping controller can well damp inter-area low-frequency oscillation, and is insensitive to time-delay to some degree.
Optimization of Phase Change Materials Used in Asphalt Pavement to Prevent Rutting
Authors: Chen Mei Zhu , Hong Jing , Wu Shao Peng , Lu Wan , Xu Guang Ji
Published: March 2011

Rutting is a common and serious phenomenon in asphalt pavement especially in high temperature areas. Phase change material (PCM) can adjust temperature through storing and releasing thermal energy during phase change process and has been used in thermal energy storage areas and building materials. However, the use of PCM to regulate the temperature of asphalt pavement has not been widely studied. In this paper, the feasibility of temperature self-control asphalt pavement using PCM was studied for preventing rutting. The temperature-control mechanism of asphalt pavement with PCM has been presented. The selection criteria of PCM used in asphalt pavement have been made. Meanwhile, a paraffin/expanded graphite shape-stabled phase change material with a phase change temperature range of 40°C~50°C has been used in this study. The temperature rising test of asphalt concrete showed that sample with PCM exhibited a lower temperature than the control sample, which indicates that it is feasible to use PCM in asphalt pavement for lowering temperature and preventing rutting.
The Short-Term Load Forecasting Model Based on Improved Gene Expression Programming Arithmetic
Authors: Li Yan Mei , Wang Jing Min
Published: March 2011

Applying the improved gene expression programming arithmetic to optimization plan,the convergence rate and precision of the model can be improved,which can be used to load forecasting. Preprocessing the load sample data,and applying the flexible skills of the improved gene expression programming arithmetic ,the paper forecasts the whole point load of future short-term to see the same point load sequence of different work-day as sample.Through a case analysis,the improved gene expression programming arithmetic has been proved to have more efficiency and faster convergence rate than optimization methods.
Analysis on the Acquisition between Ping an Insurance Company of China, Ltd and Shenzhen Development Bank Limited Company
Authors: Zeng Qi , Wang Long Ling
Published: March 2011

June 12, 2009, Ping An Insurance (Group) Company of China, Ltd published announcement that it would adopt " directional addition + agree on transfering " to acquire Shenzhen Development Bank. The news came out, all walks of life proclaimed comments in droves, which account for the majority, so far the transaction has been gained first certainty from the China Insurance Regulatory Commission, Department of Commerce, China's Bank Regulatory Commission, China's Securities Regulatory Commission and other departments. This paper attempts to review the process of this incident, briefly analyze of the advantages and disadvantages after its acquisition, discuss the guided significance to mixed operation of China's financial industry.
Chloride Ions Penetration Resistance of Steam-Cured Concrete for Railway Precast Elements
Authors: He Zhi Min , Liu Jun Zhe , Wang Tian Hong
Published: March 2011

By use of ASTM C1202, this paper studied the influence of mineral admixtures on the chloride ions penetration resistance of the steam-cured concrete. The experimental results indicated that mineral admixtures improved the permeability properties of high-performance concretes, but at different rates depending on the binder type. FA required a relatively longer time to get its beneficial effect. For each 10%~40% replacement of OPC by FA in a concrete mix, the values of coulomb charge of steam-cured and standard curing concrete reduces by 8%~17% at180 days. When 30% weight of the OPC were replaced by FA and ground blast furnace slag(GBFS), the inclusion of 30% mineral admixtures provided a significant improvement to the chloride ions penetration resistance properties of steam-cured and standard curing concrete at 28 days and 180 days, especially for the combination of 10% FA and 20% GBFS (double adding).
Study on Incentive Mechanism of Large-Scale Dredging Project Based on Fairness Preference
Authors: Zhou Bin , Zhang Zi Gang
Published: March 2011

This paper establishes fair incentive model of large-scale dredging project using principal-agent theory and fairness preference theory and analyzes the influence of technical parameters of ships and bid price of the dredging project on principal, agent incentives and profits. Study shows that the principal-agent model must be corrected, so this paper puts forward correction methods and calculation methods.
The Error Analysis and Data Processing of Leaf Water Potential
Authors: Zhou Zong Guo , Lou Yin Xia , Chu Jian
Published: March 2011

For the implementation of precision irrigation (PI), it is most important to measure precisely plant water potential. The traditional measuring instruments still can not meet the need for continuous automatic detection of plant water potential, and have difficulty detecting living plant water potential. Plant water potential soft- sensing is one of the ways worth exploring. The first thing we should think about is the accuracy of the data. Filter the information of plant water potential acquired by the detecting system and further analyze this information to discover the change rules on the plant water potential.
The Eco-Efficiency Evaluation on Petrochemical Industry Based on Three-Stage DEA Model
Authors: Yao Feng Ge , Zhang Ping
Published: March 2011

Petrochemical industry produces long-lasting industrial waste gas, waste water and waste residues which affect ecological environment in our country seriously. The eco-efficiency rate is a significant indicator in evaluation industrial sustainable development, which represents the efficiency of alleviation pressure on the environment using natural resources in the economic growth. In this paper, we used three-stage DEA model to evaluate the eco-efficiency of the petrochemical industry. The empirical analysis shows that it is feasible to use the three-stage DEA model on evaluation the eco-efficiency of the petrochemical industry. The conclusion is has a practical and theoretical significance to promote sustainable development level of petroleum enterprise.
Application of a New Energy Supply Scheme in Remote Areas and Research for Energy-Saving Technology
Authors: Li Xiao Xiong , Niu Shuang Guo
Published: March 2011

To solve no electricity in remote areas, a new type of power supply scheme is designed and a multi-function power cabinet and a energy-saving lighting are manufactured. Moreover they are applied in wang-an management office in Yellow river, This can not only supply enough power for it,but also save invest and energy, so it is very significant today.
Face Detection Based on Skin and Improved ICA
Authors: Wang Yan , Jiang Zheng Wu
Published: March 2011

Face detection has been developed into one independent research direction. This paper proposes a detection method based on the combination of skin color and improved ICA. The method makes face detection in color images real and abandons the conventional way of detecting grey rather than color images. Its description is as follows: In the beginning, skin color mode should be founded on the basis of a new color space called H_SI_I. Then with the help of prior knowledge, image preprocessing can be implemented to obtain candidates’ faces, which will be detected by improved ICA. Experiments demonstrate that the method proposed by this paper has better effect than the conventional face detection based on subspace as far as speed and accuracy is concerned.
Analysis and Solutions to the Problems of Audio-Visual Archives Management
Authors: Chang Yue
Published: March 2011

Audio-visual archives are national important part of files. Compared to traditional paper files, there are some differences in the carrier, requirements, and storage conditions and so on. Many people ignore this distinction which results in the current problems of management. Some people even have some misunderstanding of it. The management system is not perfect and there are other problems, such as poor storage conditions, difficulty of collection and so on. In order to make good use of audio-visual archives, these issues are should be solved and improved.
A Method of Extracting Opinion from Chinese Product Review
Authors: Liu Rui , An Yi , Song Lang
Published: March 2011

Automatic opinion mining and summarization from online reviews are very useful for customers and merchants. This paper proposes a method to extract opinions from Chinese product reviews. Firstly, reviews are pre-processed and the sentiment features are extracted based on a sentiment lexicon. Then, it finds out the matching target attribute using the extracted sentiment features base on the using co-occurrence knowledge of topic feature and sentiment feature. After the opinions were found, it generates the summary for products according to the most common opinions.
Urban Competitiveness Measure Analysis of Jinan and Qingdao Cities
Authors: Zhang Guang Yi , Li Xiao Hui , Zhang Ping
Published: March 2011

The comparative analysis of Jinan and Qingdao which are located in Shandong peninsula is made with the purpose of improving urban competitiveness of these two most influential cities and reinforcing Shandong province’s macroeconomic strength accordingly. The analytic hierarchy process (AHP) methodology is applied to structure an urban competitiveness model. Furthermore, a dynamic evaluation of both cities is conducted based on evaluation methodology involving factorial analysis and AHP, which is followed by strategic proposals beneficial to both of them and is thus conducive to the region’s economic harmonious development.
Synthesis of Highly Ordered Nanotubular Oxide Layers on Ti-6Al-4V Alloys by Anodization Technique
Authors: Liu Shi Kai , Zuo Hong Sen , Yang Hai Bin , Zou Wen Jun , Li Zheng Xin
Published: March 2011

Highly ordered nanotube arrays were fabricated via electrochemical anodization of Ti-6Al-4V (TC4) alloy foils in aqueous fluorine containing electrolytes. The formation of ordered nanotubular films was affected by the applied anodization potential and the anodization time. The optimal applied voltage and anodization time were 20V and 1h, respectively, as-prepared anodic nanotubular films were in highly ordered with the average inner diameter of about 120nm, the wall thickness of 17nm and the tube length about 300nm. The tubular nanostructures were examined by field emission scanning electron microscopy. The possible nanotube formation mechanism was also discussed.
Intersection Signal Optimizing on Condition of Ice-and-Snow
Authors: Mao Cheng Yuan , Pei Yu Long , Cheng Guo Zhu , Mo Xuan Yan
Published: March 2011

Comparing to the condition of normal road surface, the driving speed, headway, following-up speed, start-up time, braking time, start-up delay and walking speed are different on the condition of ice-and-snow. This paper surveyed and contrastively analyzed the traffic flow characteristics on the two conditions, optimized the intersection signal, and then verified the validity of the method by simulation.
Hybrid Dynamic Principal Conponent Analysis Approach for Fault Detection in Steel Rolling Process
Authors: Shi Huai Tao , Liu Jian Chang , Li Long , Zhang Yu
Published: March 2011

In traditional dynamic principal component analysis (DPCA) for fault detection, there are some drawbacks such as an excess of the number of principal components (PCs), low computational efficiency, etc. For dealing with the problem, this paper develops a hybrid dynamic principal component analysis (HDPCA) technique, this method can remove spacial and serial correlation by divide-and-conquer algorithm instead of parallel processing strategy, which can detect individual fault accurately and efficiently. The strip breaking fault in steel rolling process is used to demonstrate the improved performance of developed technique in comparison with traditional DPCA fault detection methods. It can be perceived that HDPCA algorithm has the better performance of fault detection and computational efficiency.
UHF RFID Reader Implementation for EPC C1G2 Protocol
Authors: Xu Li Yan , Sun Ling Ling , Xiao Zhi Hua , Hu Fei Yue
Published: March 2011

UHF RFID system has been mainly used in logistics,production and supply chain management. The implementation of UHF RFID reader with excellent performance is still challenging. This paper presents a UHF RFID reader implementation for EPC C1G2 protocol. EPC C1G2 physical layer architecture and some critical modules like encoder ,decoder, modulator and demodulator are described in details. All modules are verified in FPGA and the experiments demonstrate that the designed RFID reader baseband system could perform well.
Solution to Design Difficulties in E-Business VR Platform
Authors: Kuang Rui Hu , Kuang Ju Chi , Chen Ze Ming
Published: March 2011

Framework in e-business platform based on VRT (Virtual Reality Technology) was discussed, and difficulties in the process were investigated, which was followed by corresponding solutions. Then solution was got as: (1) in allusion to exceptional situation in the server-side, the mechanism of cutoff and junction is wondrously effective by the way of using the language statements, “try” and “catch”; (2) packaging data enables server-side to receive a great deal of data, and to escape data pileup; (3) using the way of scene switchover can settle harmonization of the whole and the part; (4) problem of motion picture flicker can be commendably solved by using double buffer memory of technology with Java; (5) the key numeration algorithm of bitmap rotation can account for the problem of quick rotation of bitmap.
Spatial Load Forecasting by Data Fusion Technology
Authors: Zheng Hua , Xie Li , Zhang Li Zi
Published: March 2011

Spatial load forecasting is one of key problems in the process of electric system planning. But due to the special complexity of the power load, spatial load forecasting is still unsolved and need to be studied further. Here spatial load forecasting is presented by data fusion technology. In detailed, the samples are firstly classified by grey clustering, which results in the better-performanced samples labeled with the grey leagues. After that, as limited samples as be concerned, various LS-SVMs are trained by the corresponding classified samples. In this way, complicated nonlinear regression modeling of spatial load and its influenced factors is accomplished by LS-SVM with more efficient training. Finally, real data are employed to test the proposed approach.
Research on Nonlinear Coupling Analysis Based on Polynomial Model
Authors: Liu Guang Fu , Zhang Wei Gong
Published: March 2011

For a multi-dimension force transducer, the mutual coupling between any two force transducers is unavoidable, and normally, the coupling characteristic is nonlinear. But the nonlinear coupled transducers are often treated as linear coupled ones since the difficulty of nonlinear decoupling. The 6-axis wheel force transducer (WFT), as the key instrument of vehicle roadway test system, the precision of which is influenced badly by the mutual coupling. The linear coupling analysis and decoupling method was introduced, on the basis of which, the polynomial nonlinear coupling model was derived, and the polynomial nonlinear decoupling method was discussed. The measurement data of WFT were processed. The results indicate that the accuracy of nonlinear decoupling is higher than that of linear decoupling.
Mathematical Modeling and Cultivation of Student Mathematics
Authors: Dong Ji Xue , Zhang Hong
Published: March 2011

The article analyzes undergraduate Mathematical Modeling Competition’s characteristics and the theory foundation thoroughly,and points out the significance of this competition both in improving colledge students’innovation ability and in higher mathematical education reform. It concentrately summarizes and expatiates the prominent problems in present undergraduate Mathematical Modeling education from four aspects:students’ ability,teachers’quality,teaching facilities and the management and organization of the school,on basis of this,the article puts forward teaching strategies for undergraduate Mathematical Modeling,and also dwells on how to improve the thinking principles and capabilities about undergraduate Mathematical Modeling by examples. Establishes the teaching mode of colledge mathematical modeling and thoroughly analyses the hierarchy of mathematical modeling’s teaching and basic principles for selecting titles.At last,the article proposes several questions which we should pay attention to about colledge mathematical modeling teaching.
An Extended Throughput Model of SCTP with Scalab Congestion Control
Authors: Liu Chang Hua , Yuan Cao
Published: March 2011

The technologies of Wireless local networks and cellular network are very popular and more and more service under the integrated heterogeneous environment. Stream Control Transmission Protocol (SCTP) is considered as an ideal to support the communication between them by enabling a mobile client to freely switch the IP address in different networks. In this paper, we propose an extended analytical model for SCTP which consider the congestion window and scalable of congestion control mechanism. A great advantage of our model is that establishing a relationship between the throughput and congestion control mechanism. Furthermore, the analytical model provides a useful tool to improve congestion control mechanism of SCTP.
Cloud Storage: the New Choice of Digital Libraries Store
Authors: Wang Zun Xin
Published: March 2011

The continuous development of the digital library construction proposed high storage requirement, the traditional storage technology has become increasingly unable to meet the needs of digital library development. The emergence of cloud storage technology for digital libraries provide a new storage options, compared with traditional storage, cloud storage has obvious advantages. This paper analyzed the data type of digital library, by comparison with the traditional storage to study the advantages of cloud storage.
Research on Confidentiality about Provenance Based on Logical Key Hierarchy
Authors: Wang Feng Ying , Li Xiu Mei
Published: March 2011

By analysing the security needs and the threat model of data provenance, a Key distribution algorithm based on Logical Key Hierarchy(LKH) is brought forward aiming at the confidentiality of provenance. In this paper, we make use of the LKH tree to reduce the storage of the keys for session encryption keys(SEK) of provenance records and decrease the transmission overhead of the provenance chains, which meet the requirement of compressing provenance chains, and then propose the method of dynamic expansion number of auditors that works out the problem of the auditors number dynamic changes existing in the safety requirements for confidentiality of provenance records.
The Application of Fuzzy Clustering Method in the Division of Reservoir Flow Unit
Authors: Yang Er Long
Published: March 2011

Based on the sedimentary character of six time cells in P1 Beierxi of Sabei developed region in Daqing oil field, this paper applies fuzzy mathematics method to divide reservoir flow unit. At present, there is no uniform division method, because flow unit is a fuzzy set with multi factor influence. There is great uncertainty among every influential factor, so does the influence extent of every factor to flow unit division. It isn’t objective to divide flow unit by one factor or simple congruence of several factors. However, the fuzzy mathematic method is fit to analyze the uncertainty relation in system or among systems. When the data of core well is in defect, applying the fuzzy clustering method to divide flow unit and combining development practice can reduce human factor greatly and make classification more objective and rational.
Theoretical Analysis of Resource Swap for Reuse Based Hardware Task Scheduling in Reconfigurable System
Authors: Fu Ting Ting , Liu Peng
Published: March 2011

In reconfigurable system, hardware task placement algorithms are trying to find rectangle of available reconfigurable logic units in a fast manner. Furthermore, low cost and less fragmentation are another two metrics of high performance algorithm. In previous work we proposed a Transformable Vertexes Information based Algorithm (TVIA) for online task placement in reconfigurable system. In this paper, based on TVIA, we adopt Resource Swap scheme for reuse based hardware task scheduling. Hardware tasks will remain in the reconfigurable device after execution. Only when there is no enough space left for incoming tasks will previous tasks been swapped out from configurable device. This paper discusses the principle and procedure of resource swap management and compares several algorithms using simulation.
Study on Economic Evaluation Index System of Oil–Gas Exploration Project
Authors: Yin Ai Zhen
Published: March 2011

The existing economic evaluation index system of oil-gas exploration project lacks environmental efficiency index and social efficiency index, and has no definite risk index. This paper analyzed the existing economic efficiency indexes, added the social efficiency and environmental efficiency indexes. These indexes can efficiently reflect the project’s difference, moreover, the data can be obtained easily. This paper designed the indexes, which can weight project geology risk, the project risk and the economic risk. These indexes composed a systematic and comprehensive system of oil-gas exploration project economic evaluation index. This index system can reflect the project characteristic from different angles, and provide the policy-making reference for the policy-maker.
Research and Implementation on the Cloud of Chinese Letter
Authors: An Jun Xiu
Published: March 2011

The Chinese word clouds can view the Chinese documents based on users’ input or URL web sites, in accordance with the appearing frequency of words in the documents to generate a multi-state performance image, similar to the cloud images, namely, "word cloud". This system first obtains Chinese documents users view, cuts up words to the documents, then counts the frequency of each word, and finally puts the words on the appropriate framework based on the high or low word frequency, showing an effect of "word cloud". This system uses the hash algorithm making the output fonts not overlap, and generates personalized display images of Chinese word clouds, which makes users quickly understand the key information in Chinese documents and presents to users the different visual feelings.
The Implementation of Lunar Rover’s Trajectory Tracking Control of Based on Trigonometric Spline Wavelet
Authors: Wei Ling , Guo Qi
Published: March 2011

This article gives the trajectory tracking control methods of lunar rover vehicle on the flat slope based on a triangular spline wavelet structured. It is based on the dynamic model equations to describe the movement of lunar rover, sample the desired trajectory within a finite time; use triangular spline wavelet method, numerical solution of control parameters to achieve the desired trajectory tracking lunar rover control. This method is small, simple, high precision, and can achieve any desired trajectory tracking of non-linear curve. Numerical experiments verify the correctness and effectiveness of the method.
Fast Distributed Algorithm of Mining Global Frequent Itemsets
Authors: He Bo
Published: March 2011

Most distributed algorithms of mining global frequent itemsets worked on net structure network and adopted Apriori-like algorithm. Whereas there were some problems in these algorithms: a lot of candidate itemsets and heavy communication traffic. Aiming at these problems, this paper proposed a fast distributed algorithm of mining global frequent itemsets, namely, FDMGFI algorithm, which set centre node. FDMGFI algorithm made computer nodes compute local frequent itemsets independently with FP-growth algorithm, then the centre node exchanged data with other computer nodes and combined, finally, global frequent itemsets were gained. FDMGFI algorithm required far less communication traffic by the searching strategies of top-down and bottom-up. Theoretical analysis and experimental results suggest that FDMGFI algorithm is fast and effective.
Constructing Domain Ontology of E-Business Based on Rough Concept Lattices
Authors: Xu Hong Sheng , Song Jia
Published: March 2011

Variable precision rough set (VPRS) model and formal concept analysis are studied in this paper, include algorithm of reduction attribute and extraction rule. The traditional algorithms about attribute reduction based on discernibility matrix and extraction rule in VPRS are discussed, there are problems in these traditional algorithms which are improved. Rough concept lattice model is proposed based on integrating of variable precision rough set model and formal concept analysis, and is used to reduce formal context. The domain ontology model of e-business is built combined with knowledge of domain expert, and original ontology model of the United Nations Standard Products and Services Classification Code by way of core ontology in order to enhance system robustness and efficiency.
Diagnosis and Reconstruction on Institutional Culture of State-Owned Forestry Enterprises
Authors: Wang Yue Fen
Published: March 2011

This paper diagnoses institutional culture of state-owned forestry enterprises. Then, it reconstructs and fosters institutional culture for enterprises’ development to enhance the competitiveness of state-owned forestry enterprises. According to Denison Organizational Culture Model and Corporate-Culture Measurement and Assessment System of Redetac Consulting, this paper diagnoses seven dimensions and fifteen factors of institutional culture of state-owned forestry enterprises. This discovers that problems of leadership system, personnel system and management mode are more serious and indicates that business leaders should reconstruct those to form democratic decision-making, scientific training, performance assessment and other system and should adopt approaches of management by walking around, gather-style management, and people-oriented management.