bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of Reversible Information Hiding Scheme Based on CARDBAL2 and Color Field Structure
Authors: Ren Shuai , Zhang Tao
Published: April 2011

Propose a new image processing method which named Color Field Structure (CFS). The direction of CFS represents the information. Take advantage of the feature that the energy of the image would gather and spread on four components (LL2, LH2, HL2 and HH2) in the sub-image after first-order CARDBAL2 multi-wavelet transform. Propose an Information Hiding Algorithm based on modifying the direction of CFS in four CARDBAL2 first-order sub-images. The maximum change of direction angle is usually less than π/2k. The information is divided into two parts, one part is embedded in LL2 and HH2, and the other part is embedded in LH2 and HL2. Use the Logistic chaotic map, Knight's Tour traversal and the genetic algorithm to improve the consistence of the embedded data bits’ order and the character of the sub-image. Experimental results indicate that the proposed scheme can increase invisibility and robustness separately by 28.64% and 23.06% averagely, and has certain ability against steganalysis such as Higher Order Statistics based on wavelet coefficients. Moreover, the scheme has excellent sensitivity of image processing.
EM Acceleration Algorithm Using the Vector-ε Apply in Multi-User Detection
Authors: Xian Jin Long , Li Jian Wu
Published: April 2011

The EM iterative algorithm is a very general and popular algorithm that commonly used for missing data to find maximum likelihood in recent years, which has the character of stability,flexibility and simlicity.However, the EM algorithm has a great weakness that the convergence speed is slowly; Acceleration of the EM algorithm using the Vector-ε method is proposed in order to solve this problem in this paper.In Multi-user Detection, via this accelerated algorithm, we get a good performance which trends to ML performance and improving the computational efficiency, and compared its speed of convergence with the EM algorithm that Vector-ε acceleration algorithm has faster convergence than the standard EM algorithm.
Design of the Continuous Casting Machine for Battery Grid
Authors: Gao Chang Yin , Li Wan Quan
Published: April 2011

In order to increase the production quality and efficiency of the battery grid, the new type of continuous casting machine is designed in this article. First the structure of the continuous casting machine is introduced, namely drum, shoe and clamp mechanism. Then, the drum is designed whose peripheral surface is machined the battery grid pattern machined ,in which the liquid circulation system is disposed to maintain its stable temperature. Finally the shoe is introduced which has an arcuate surface, and it is maintained in pressure-mating engagement with the outer peripheral surface of drum by the clamp mechanism The successful design of continuous casting machine will significantly increase the production efficiency and quality of battery grid.
Data Mining Techniques to Enhance Customer Lifetime Value
Authors: Lin Chia Chia , Shih Dong Her
Published: April 2011

It is proved by many studies that it is more costly to acquire than to retain customers. Consequently, evaluating current customers to keep high value customers and enhance their lifetime value becomes a critical factor to decide the success or failure of a business. This study applies data from customer and transaction databases of a department store, based on RFM model to do clustering analysis to recognize high value customer groups for cross-selling promotions.
Experimental Study on Influence of High-Borosilicate Glass Transmittance on Solar Cooling Tube Thermal Performances
Authors: Chen Fei , Zhao Hui Zhong
Published: April 2011

The experiment to test the solar radiation intensity through borosilicate glass tubes with a variety of different radius of curvatures and different qualities are taken on condition that the solar radiation intensity is from 23 W/㎡to1022W/㎡. When the diameter increasing to 65mm from 58mm, the single high-borosilicate glass tube’s transmittance changes to 93.2% from 93.5% and double’s transmittance changes to 88.2% from 90.1% .When high-borosilicate glass tube’s wall thickness is uniform and non-uniform, the transmittance is nearly the same. We can decrease the sleeve’s diameter to 58mm and the of evacuated solar collector outer tube’s diameter to improve the thermal performance of the cooling tube.
Study on Harmonic Analysis and Error Correction in Synchro to Digital Conversion
Authors: Liu Yan , Ye Ze Gang
Published: April 2011

The current implementation of the synchro to digital conversion (SDC) can not directly detect harmonic which can cause the problem of low precision angle measurement. To improve accuracy of angle, harmonic interference was analyzed and summarized in the axis-angle to digital conversion process. Through detailed research, a new angle measurement formula is proposed in this paper, this formula can be very good for angle error correction and compensation. In order to meet the practical requirements, a software measurement method based on FFT algorithm of harmonic analysis and error correction is put forward. Matlab simulation shows that the formula and method is effective and feasible.
Dynamic Pricing Model of Power Options in a Fractional Market
Authors: Zhang Hui , Meng Wen Yu
Published: April 2011

In this paper, we study the new method of option pricing based on the risk preference. We define the equivalent classes of random events based on the historical information and the risk preference. The dynamic pricing model of power options has been studied. Applying the conditional density function of the stock price process, we have given the explicit solution of the model. And we analyze the influence of Hurst parameter on pricing formula.
Measuring and Processing Complex Internet Topology
Authors: Xu Ye , Wang Zhuo
Published: April 2011

Measuring complex Internet topology is primary research activities in Internet-related research fields and has become a focus recently. And due to the complexity of Internet topology, further processing is required and is thoroughly studied in this paper. First, Internet topology measurement is performed by CAIDA measurement approach with more than twenty monitors. Then the problem of sampling bias is quantitatively studied. Mathematical models are introduced into both the node bias problem and link bias problem, and final option is gained. Final results are that more than 156 CAIDA monitors are necessary in order to have a full Internet topology measurement result.
A Brief Study on Successful Reform of English Teaching in China Based on Web
Authors: Tian Xian Zhi
Published: April 2011

With the development of English Teaching, different kinds of teaching reform have been performed in the reform course. In fact, in the course of teaching, there are many teachers trying different ways to develop teaching efficiency. Some reforms are concerned only with teaching ways or methods, but some are concerned with teaching theories. Only with the realization and change of teaching theories can teachers reform their teaching ways. In the paper, the teacher will analyse some successful teaching reforms to reach teaching aims and improve teaching efficiency.
Multi-Objective Optimization Algorithm Based on Gene Expression Programming and Virus Evolution
Authors: Wang Wei Hong , Du Yan Ye , Li Qu
Published: April 2011

Evolutionary Multi-objective Optimization (EMO) is a hot research direction nowadays and one of the state-of-the-art evolutionary multi-objective optimization algorithms ——NSGA-II has gain wide attention and application in many fields. Gene Expression Programming (GEP) has a powerful search capability, but falls into local optimum easily. Based on the transformed GEP, NSGA-II and the virus evolution mechanism, a new multi-objective evolutionary algorithm GEP Virus NSGA-II is proposed. With the infection operation of virus population, the diversity of the host population is increased, and it’s much easier to jump out of the local optimum. And this algorithm has got good experimental results on 9 standard test problems.
GM(1,1) Model of Moving Average Operation to the Original Sequence and its Application
Authors: Zeng Bin , Zeng Wu Jun
Published: April 2011

The grey forecasting model has been successfully adopted in various fields and its accuracy is closely related with the original data. Improving the smoothness of the original sequence can increase the accuracy of GM(1,1) model and many researchers have done such work about the original sequence improvement. The paper adopts moving average operation on the original sequence and gets the new sequence with good smoothness. In the process of the establishment of GM(1,1) model the paper adopts the integral method to get the background values and expand the equal interval into the unequal interval. The examples show the method can fit and predict the system development more accurately which provides a new way for the data processing.
On Fuzzy Logic in Hydroturbine Temperature Fault Diagnosis in HESS
Authors: Xu Ye , Wang Zhuo
Published: April 2011

Hydroturbine temperature fault diagnosis in hydro-electrical simulation system (HESS) through a way of fuzzy logic is studied in this paper. Failure reasons of temperature-related subsystems of hydroturbine are firstly discussed, and fault diagnosis principles, thereby, are determined. Fuzzy logic, including membership function, fuzzy matrix and so on, are then studied and used in the fault diagnosis process. Finally, the fuzzy logic fault diagnosis is testified by examples and experiments to be acceptable in efficiency and accuracy.
Studies and Application of Heavy Equipment Fault Diagnosis System
Authors: Gan Yi , Liu Sha , Zhu Wen Bo
Published: April 2011

Analyze the ways to get fault information for heavy equipment fault diagnosis system, which are the control system of the device, layout sensors to get the key performance parameters, and human-computer interaction. In order to improve accuracy and efficiency of the diagnostic system, the methods of fault location tree retrieval and similar case retrieval are applied respectively according to the difference of fault information content in the diagnosis information database. The diagnosis system introduced in the paper gets effective initial application in the heavy equipment fault diagnosis system.
A Novel Algorithm Based on the Degree Tree for Graph Isomorphism
Authors: Hao Long
Published: April 2011

The graph isomorphism problem is to study the relationship between two graphs which seem to be different, but essentially identically. A novel algorithm based on the degree tree is proposed, where each node of the tree describes a given vertex and its neighboring information of a graph. Two vertexes in different graphs are regarded as mapping if the corresponding nodes and all their junior nodes are similar. Hence by comparing their degree trees, two graphs can be determined whether matching or not, and the mapping vertexes can be found. Experimental results show the approach’s performance.
Heart Sound Recognition - A Prospective Candidate for Biometric Identification
Authors: Cheng Xie Feng , Tao Ye Wei , Huang Zheng Jiang
Published: April 2011

Based on principles of human heart auscultation and the associated signal processing technology, we designed and manufactured "a double-header two-way voice auscultation detection device". The paper introduced a special human feature extraction method which is based on improved circle convolution (ICC) slicing algorithm combined with independent sub-band function (ISF). Follow we adopt a fire-new classification technology namely s1 and s2 model which is through two recognition steps to get different human’s heart sound features to assure validity, and then use similarity distance to carry out human heart sound pattern matching. The method was verified using 10 recorded heart sounds. The results show that identification accuracy is 85.7% in the two-step mode, and the error acceptance rate is less than 7%，and refusing error rate is less than 10% for normal people.
On Adaptive Synchronization in Complex Networks
Authors: Li Shu Liang , Wang Dan , Zhang Le
Published: April 2011

The pinning adaptive synchronization of a class of weighted complex networks is investigated in detail and several criteria are obtained for locally exponentially asymptotic synchronization. The detailed number of pinned nodes to achieve network synchronization can be estimated by calculating the eigenvalue of the minor matrix of extended coupling matrix. Compared with the general adaptive controllers, the convergence speed of the proposed pinning adaptive controllers is greatly enhanced by an adjustable parameter.
Speech Signal Denoise Based on LMS Algorithm in Simulink
Authors: He Yan Ping
Published: April 2011

The adaptive noise cancellation system by LMS algorithm need not to know the prior knowledge of input speech signal and noise, and can carry out denoise. In this paper, we present a general approach to using Simulink to build adaptive filter which may denoise for noise added speech signal. Simulation results show that this method has the good suppression ability for the noise of collection speech signal.
Intelligent Health Diagnosis Method for Aircraft Based on Multi-Source Information Fusion
Authors: Cui Jian Guo , Zhao Wei , Zhang Hong Mei , Lv Rui , Shi Peng
Published: April 2011

In order to diagnose the health status of aircraft effectively, a health diagnosis method based on D-S evidence theory is proposed. Firstly, this method apperceives the healthy information of a real aircraft stabilizer with real time by using AE(Acoustic Emission, AE) detecting system. Secondly, use the wavelet transform to extract feature of the AE signal, including three characteristics of maximum value (MA), singular value (SVD), standard deviation (STD) to set up characteristic vector, then using GRNN and BP neural network to classify the characteristic vector. Finally, D-S evidence theory is used for decision reasoning. Therefore, The Health State of aircraft can be diagnosed. Experiments show that the monitor has good performance to recognize and diagnose the fatigue crack of aircraft structural parts, which is proposed to be effective.
Research and Implementation of Conglutinated Macrophage Image Segmentation Based on Improved Watershed Algorithm
Authors: Wang Ping , Chen Rong , Luo Wei , Xia Rui Hua
Published: April 2011

In the process of macrophage image manufacture, cell adhesion often appears because of equipment or man-made reason and then influences subsequent automatic detection and analysis. The traditional watershed algorithm is easy to cause over-segmentation for the volatility of gray extremum. To overcome these phenomena, an improved watershed algorithm which was based on macrophages image segmentation was introduced in this paper. The simulation results show that the improved algorithm can effectively segment adhesive macrophages and restrain the over-segmentation phenomena with an acceptable computation speed.
Distributed Information Fusion Structure Based on Data Fusion Tree
Authors: Xue Ying Hua , Li Jing
Published: April 2011

A distributed information fusion structure based on data fusion tree is built to realize precise localization and efficient navigation for the mobile robot. The multi-class, multi-level information from robot and environment is fused using different algorithms in different levels, and make the robot have a deeper understanding to the whole environment. Experiments demonstrate that the new model proposed in the paper can improve the positioning precision of robot greatly, and the search efficiency and success rate are also better than traditional mode.
Laboratory Investigate of the Effect of Fine Aggregates on Asphalt Mixture Materials
Authors: Ye Yong , Cai Yi Zhou
Published: April 2011

The objective of this study is to investigate and evaluate the effect of fine aggregates (aggregate size smaller than or equal to 2.36 mm) on the compressive strength and creep behavior of asphalt mixtures. The variables that are considered in the study include the sizes and gradations of fine aggregate. A kind of standant aggregate gradation and four kinds of reduced aggregate gradation mixture specimens are used. Uniaxial compression and static creep tests were realized at different loading conditions. The test results showed that the different fine aggregate sizes do not result in significant differences in compressive strength and creep values using the same percentage of fine aggregates (38.4%). Only the different gradations showed a little differences for mixtures made with different gradations but same aggregate size (between 2.36 and 1.18 mm).
Simulation and Optimization to the Information Security Management Measure Based on the Parallel Control
Authors: Wang Peng
Published: April 2011

To improve the effectiveness of management measure for the information security, the parallel control approach is employed to the optimization of information security management measure. The simulation software Extend is applied to build the artificial system of information security management system, and the information security management measure is evaluated via the artificial system. A parallel control system is applied to achieve the interaction between the true system and the artificial system to minimize their difference. The computational experiment method is used to continuously adjust the information security management measure, and obtains the satisfied information security management measure finally. Take the public Internet network management as example to illustrate this method can achieve the real-time simulation, evaluation and optimization of information security management measure.
Multifunction Synchro-to-Digital Conversion on Software Design
Authors: Liu Yan , Ye Ze Gang
Published: April 2011

The current Synchro-to-Digital conversion (S/DC)with high reliability, high accuracy and widely used in the military field, but it has high cost and low tracking speed, not suitable for high speed and low-cost industrial applications. In this work, the principle of synchro and the harmonics of the synchro output signals are investigated. Multifunction S/DC software design using FFT algorithm and IIR digital filter technology is proposed. It Integrated many functions, such as angle position, harmonics analysis and filter, it also improved measurement accuracy and speed, reduced the cost. The simulation results by Matlab show that the method is feasible.
Speed Management on Icy and Snowy Pavement of Urban Road
Authors: Wu Li Xin , Cheng Guo Zhu
Published: April 2011

Icy and snowy pavement create obvious adverse impacts on road safety so that speed management is necessary for safety. According to the analysis of driver’s brake reaction time and vehicle’s brake distance on icy and snowy pavement, automobile’s parking distances were calculated and given under the condition of different speed and icy and snowy pavement types through observed friction coefficient data of snowy pavement, rough icy pavement, smooth icy pavement and icy-snowy pavement. The calculation method of maximum safe speeds under the condition of different icy and snowy pavement types and traffic volume were put forward. And suggestion values of car’s maximum safe speed when driving on icy and snowy pavement were given.
Structural and Optical Properties of ZnO Nanorods Thin Films by Solution-Growth Method
Authors: Ting Chu Chi , Chang Sie Ping
Published: April 2011

Highly c-axis-oriented ZnO nanorods thin films were obtained on silica glass substrates by a simple solution-growth technique. The most compact and vertically-aligned ZnO nanorods thin film with the thickness of ~800 nm and average hexagonal grain size of ~200 nm exhibits the average visible transmittance 85%, refractive index 1.74, and packing density 0.84. As we demonstrate here, the solution-growth technique was used to produce high-quality and dense ZnO nanorods thin films, and is an easily controlled, low-temperature, low-cost, and large-scale process for the fabrication of optical-grade thin films.
An Anomaly Intrusion Detection Based on Hidden Markov Model System Call Sequenc
Authors: Wang Dong Liang , Wang Zhi Gang
Published: April 2011

To improve detection accuracy, Utilizing HMM (Hidden Markov model) and BW to building model, the detection accuracy improves greatly. First, the research progress of intrusion detection is recalled, then the model based on Markov and BW is presented. An example of using system call trace data which is used in intrusion detection, is given to illustrate the performance of this model. Finally, comparison of detection ability between the above detection method and others is given. It is found that the IDS based on HMM System Call sequence has improve the accuracy greatly.
A Multi-Swarm Cooperative Perturbed Particle Swarm Optimization
Authors: Yang Xiang Jun , Zhao Yi Long , Chen Yu Chuang , Zhao Xin Chao
Published: April 2011

Combined with a variety of ideas a Multi-swarm cooperative Perturbed Particle Swarm Optimization algorithm (MpPSO) is presented to improve the performance and to reduce the premature convergence of PSO. This algorithm includes the idea of multiple swarms to improve the evolution efficiency by information sharing between populations to avoid falling into local optimum caused by single population. It also includes the idea of perturbing the swarms beside the global best solution, which can escape from local optimum. Experiments show that the proposed algorithm MpPSO has better performance, better convergence and stability when comparing with the traditional and the recently improved particle swarm optimization.
Research on the Construction of Financial Accounting Information Systems
Authors: Chen Jie , Xia Fang Yi
Published: April 2011

The rapid development of network technology and the increasing maturity of e-commerce technology have integrated the financial accounting information system, originally a single closed system of value stream, into a unified enterprise information management system of logistics and value stream. This paper presents suggestions on how to construct the financial accounting information system: exploring new management mode and implementing management reform; standardizing business processes and establishing a standardized management system; addressing the interface issues between various operation systems to achieve resource sharing; building new financial software systems to achieve real-time reporting of accounting information; establishing financial accounting information management systems to improve the accuracy and reliability of accounting information.
Price Game Based Spectrum Sharing in Cognitive Radio Networks
Authors: Li Yi Bing , Yang Rui , Ye Fang
Published: April 2011

The competitive price model is applied in the analysis of spectrum sharing in cognitive radio networks. As the prices of shared spectrum are determined independently by primary users in practical application, to deal with the solution of equilibrium price without acknowledgement of current price strategies from other primary users, the iterative method is used to calculate price of the shared spectrum. In order to achieve better characteristics, an exponential iterative method for the competitive price based spectrum sharing model is proposed. It can achieve the desired spectrum price only with the prices strategies during last iteration. Simulation results show that the proposed exponential gradient iterative scheme can achieve the equilibrium price that maximizes the profits of primary users, and have better convergence performance than linear gradient iterative scheme.
Implementation of Grid Resources and Services Based on WSRF
Authors: Zhong Luo , Zuo Gan , Song Hua Zhu
Published: April 2011

Traditional web service resource hasn't the concept of state and exists many limitations in application. WS-Resource of WSRF solved this problem. This paper elaborated the principal standard protocol specifications in WSRF, analyzed WS-resources characteristics, gave the implementation steps of grid resource and service, and finally validated the superiority of WSRF resource model with an example.
The Analysis for the Environmental Impact of Natural Gas Leakage and Diffusion into the Atmosphere
Authors: Hou Qing Min , Jiao Wen Ling , Zou Ping Hua
Published: April 2011

In this paper, we investigate the leakage and diffusion characteristics of natural gas. As results show, when the natural gas leaks from the pipeline, it jet into the atmosphere in the form of positively buoyant jets. As a result, a hazardous area can appear at an altitude of 150m from the ground. Furthermore, the natural gas has a low concentration near the ground, this means the natural gas is less harmful to human body. In addition, the wind should be considered in the transport of leaked natural gas.
Cloud Computing Security Issues and Mechanisms
Authors: Yang Shu Guo
Published: April 2011

Cloud computing is regarded as one of the most enticing technologies and potential silver bullet in the IT industry. Because of open condition and general-purpose nature of cloud, security issue is becoming a bottle neck of rapid development and broad application of cloud computing. Firstly, this paper addresses cloud customers’ significant concerns about and requirements of cloud security. Secondly, cloud security risks and threats posed by the pervasive and ad hoc nature of the cloud are comprehensively analyzed. Finally, some effective and dependable security mechanisms are proposed to lower cloud security risks and meet security requirements of cloud customers. Especially, a novel scheme for integrity and copyright protection of customers’ works in the cloud is presented based on digital watermarking and digital signature.
Study on Design and Development of Mechanical Engineering Network Courses
Authors: Lin Qing Fu
Published: April 2011

It’s hard to directly transmit ‘Mechanical Engineering Online Courses’ on the computer network, for there are many diagrams with complex structures and much information capacity. By course systems analysis, course scripts making, multimedia materials production; with choice of database server platform, application technologies like streaming media and dynamic web page technology, image and video processing, the essay makes the online course design more easily and the direct transmission speed on the computer network more quickly, and helps majority of teachers design and develop large-capacity online courses.
Research on Moisture Damage Research in Hunan Province Expressway Pavement
Authors: Ouyang Xiao Ying
Published: April 2011

According to moisture damage phenomenon of hunan province expressway, this study choses Lin-Chang, Lei-Yi, Heng-Zao as research object.The parameters of the pavement, such as void, thickness, asphalt-aggregate ratio and gradation of the asphalt concrete are measured, explored water damaged reasons in hunan specific hot and humid environment and puts forward the prevention countermeasures of asphalt pavement water damage-OGFC.
Border and Coastal Surveillance Sound Target Classification Based on Optimum Wavelet Packet Decomposition
Authors: Wang Yan , Li Zhi
Published: April 2011

The present work contributes to the field of border and coastal surveillance sound target classification. A new feature extraction method is proposed based on the optimum wavelet packet decomposition (OWPD). According to the frequency characteristic of border and coastal surveillance sound signals, each signal is decomposed by selective multi-scale wavelet packet decomposition (WPD) and the OWPD tree is obtained. From their high dimension OWPD coefficients, we build the meaningful and compact energy feature vectors, then use them as the input vectors of the BP neural network to classify the border and coastal surveillance sound types. Extensive experimental results show that the classification efficiency is up to 94% using this feature extraction method, improved 6% compared with the method based on WPD.
Development Strategy for Requirement of ICTs in Engineering Learning of Comprehensive Regional Higher Education Institutes of PRC
Authors: Chen Yan Hui
Published: April 2011

Information and communication are key to the ability of the organization to respond to change. Information and communication technology (ICT) penetrates into all aspects of economy. Now graduate of comprehensive regional higher education institutes (CRHEIs) are main source of workers. Those CRHEIs should improve their quality of learning for their student being good workers. In this paper, we analyses ICT–based learning issues from undergraduates preparing for postgraduate entrance exams and undergraduates seeking a job in Linyi University. The methodology for carrying out the tasks mainly contains questionnaires according to normative Delphi technique. The research provides information and communications strategy which CRHEIs authorities should take in order to properly integrate ICTs in their CRHEIs and get their benefits.
A Brief Analysis on the Construction of Banking Office Automation System
Authors: Li Zhen , Zhao Yan Fang , Li Min
Published: April 2011

As one of the most important parts of the financial organizations nowadays, banking industry plays an important role in not just the area of high-speed operation of the sociaty’s economy but also in the area of currency exchange. The Wave of Information Technology, which has caused a swift-development of the whole world’s economy, brings about both opportunity and challengs never arised to the banking industry. The sociaty, as it is becoming more intellectual and automatic, has post a harder demand for the working efficiency of the banking industry. Therefore, the banking industry must enhance its construction of informationization and automation in order to strengthern its competitiveness as well as the economic construction of service sociaty. Banking office automation will improve the working efficiency along with modernized management level in the light of advanced computer technology.
Study of Rock-Soil Aggregate’s Shear Strength in Da-Liu Expressway
Authors: Huang Bin , Zeng Xian Ying
Published: April 2011

This study is based on 8 large-scale outdoor tests of rock-soil aggregate in Da-Liu Expressway subgrade construction site.and has got the rock-soil aggregate’s characteristics and strength parameters of deformation. Proposing alternate dry-wet effect should be taken into account in the shakedown analysis of rock-soil aggregate slope. This study provides the necessary basis for the Da-Liu Expressway slope stability analysis and control of Settlement. It also provides an important basis for further research which has been widely used in various projects RM systems approach, especially to determine physical parameters of rock-soil aggregate.
Velocity Temperature Characteristics of Time Domain Reflectometry Cable Length Measurement System
Authors: Song Jian Hui , Chen Liang
Published: April 2011

Traveling wave velocity is the key to the measuring accuracy of the time-domain reflectometry cable length measurement system. The velocity value is affected by many factors. In order to reduce the ambient temperature impact on velocity, the velocity temperature characteristics of time domain reflectometry cable length measurement system are studied. The change law of the traveling wave propagation velocity in the cable with the change in ambient temperature is studied. The velocity temperature error compensation coefficients of traveling wave in the PVC insulated cable is obtained according to the experimental data by measuring the traveling wave velocity in these cables at different temperature. Experimental results show that the measuring accuracy of the time-domain reflectometry cable length measurement system is improved significantly by velocity temperature compensation.
An Improved Algorithm of Keyframe Extraction for Video Summarization
Authors: Qu Zhong , Gao Teng Fei
Published: April 2011

Video segmentation and keyframe extraction are the basis of Content-based Video Retrieval (CBVR), in which keyframe selection plays the central role in CBVR. In this paper, as the initialization of keyframe extraction, we proposed an improved approach of key-frame extraction for video summarization. In our approach, videos were firstly segmented into shots according to video content, by our improved histogram-based method, with the use of histogram intersection and nonuniform partitioning and weighting. Then, within each shot, keyframes were determined with the calculation of image entropy as a reflection of the quantity of image information in HSV color space of every frame. Our simulation results in section 4 prove that extracted key frames with our method are compact and faithful to the original video.
Risk Analysis for the Construction Phases of Long-Span CFST Arch Bridge Based on Finite Element Analysis
Authors: Zhang Yu Feng , Sun Guo Fu
Published: April 2011

As a part of virtual simulation of construction processes, this paper deals with the quantitative risk analysis for the construction phases of the CFST arch bridge. The main objectives of the study are to evaluate the risks by considering an ultimate limit state for the fracture of cable wires and to evaluate the risks for a limit state for the erection control during construction stages. Many researches have been evaluated the safety of constructed bridges, the uncertainties of construction phases have been ignored. This paper adopts the 3D finite element program ANSYS to establish the space model of CFST Arch Bridge, and to calculate the linear, the geometrical nonlinear and the double nonlinear buckling safety factors under the six different lode cases. Then the bridge’s risks are evaluated according to the results calculated which provide a reference for design of similar project.
The Construction and Application of Chaotic Polynomial Family
Authors: Sun Chun Ling
Published: April 2011

Chaotic sequence is of vast application value and is suitable for the sequence encryption. In this thesis, the essence of the chaotic time sequence was analyzed; the limit of the chaotic sequence in the application was pointed out and the new scheme to construct the chaotic polynomial family was suggests. Also, the principle of constructing chaotic polynomial and the constructing process of the chaotic polynomial families were discussed. Several important simulation results were listed.
Research on the Impeller Tip Screenout Fault Feature Extraction of the Submersible Pump Units Based on Wavelet Analysis
Authors: Liu Guang Fu , Tao Feng Yang , Li Xin Guang
Published: April 2011

The sealed electric submersible pumps (ESP) are the main device to extract oil in the world. Many faults of ESPs can lead to fierce vibration. The impeller tip screenout fault may shorten the service life of ESP, even lead to halt. The vibration signals were acquired from normal ESPs and impeller tip screenout fault ESPs, with vibration acquisition instrument based on three-dimensional piezoelectric sensor. The typical frequency characteristics were extracted from the well-head vibration data of normal and fault ESPs with wavelet analysis. According to the fault feature, the key characteristics of impeller tip screenout fault were extracted, with which the malfunction ESPs on spot can be distinguished from normal ones. The test result indicates that the method can be used in oil field to diagnose impeller tip screenout fault efficiently.
Risk Assessment Model to Natural Disaster in County Unit Based on Information Diffusion Technology
Authors: Hao Lu , Zhang Xiao Yu , Shu Zhi Liang
Published: April 2011

Accurate assessment to disaster risk is one of the keys to reducing disaster losses. However, due to the fact that the disaster situation data series in county unit are always relatively short, available data are often not sufficient for disaster risk analysis. In this paper, a risk analysis method based on information diffusion theory was applied to create a new disaster risk analysis model (CURAM), and the risk of disaster can be evaluated on higher spatial resolution of county unit. Visual Basic and Map Objects were used to establish CURAM applying object oriented technique and component technique. CURAM provided risk evaluate function to natural disaster in county unit, and thematic map making and output, etc. The risk assessment results calculated by CURAM indicated that information diffusion technology was highly capable of extracting useful information and therefore improved system recognition accuracy.
Optimization on the Improvement Schemes of Production Logistics System Based on Flexsim Simulation
Authors: Peng Jian Liang
Published: April 2011

Based on Flexsim simulation, we can easily come up with the best program for the production logistics system to improve production efficiency. First of all, by simulating the running of the original program, we can find out the bottlenecks in the production logistics system. Then, accordingly change the various parameters of the production logistics system and rearrange the layout of the workshop, thereby getting the improved program for the production logistics system. Next, simulate the running of the improved program, the results of which show that the improved program can remove the existing bottlenecks in the production logistics system. As a result, not only is the utilization of resources and equipment improved, but also production plans can be smoothly carried out. There is some practical and guiding value in this research approach and its results.
Research and Application of Paper Machine Frequency Conversion Driving System Based on PLC
Authors: Liu Wen Bo , Xu De Yu
Published: April 2011

This paper studied some kinds of realization modes of speed chain compute, load distribution and operation aimed at the realization of paper machine driving system. The frequency conversion control system based on PLC cooperating with digital manipulator was brought forward. It was mainly made up of three parts: PLC, frequency converter and digital manipulator. It used PLC to realize digital speed chain and load distribution. And it exchanged data and parameters by communication through field bus network. The results indicate that the problems of speed chain compute, load distribution and operation were solved effectively by data gathering and computing with PLC, so it is a driving system of high performance.
Website Characteristics and Online Consumers’ Repurchase Behavior: An Empirical Study
Authors: Wang Hai Ping
Published: April 2011

Online consumers experience a three-stage transaction process and every stage has its different characteristics, we developed a model based on S-O-R (Stimulation-Organism-Response) framework to show how they influence online consumers’ repurchase behavior. We used data collected from undergraduates by specified online purchase and the method of Structure Equation Modeling (SEM) to test the model. The empirical findings indicated that three aspects of website characteristics including website design, functionality and usability, post-purchase service quality all significantly affected online repurchase behavior both directly and indirectly through consumer satisfaction.
Key Issues for Personalized Learning Service Provision in Ubiquitous Learning Environments
Authors: Li Lu Yi , Zheng Yan Lin , Zheng Fan Lin
Published: April 2011

Learning itself is substantially ubiquitous, while real ubiquitous learning needs can only be supported by appropriate learning technologies. Technology enhanced personalized learning service is indispensable for ubiquitous learning. This paper discusses several key issues for personalized learning service provision in ubiquitous learning environments, including learner modeling, context management, ontology adoption and service visualization.
Drivers and Inhibitors of E-Commerce Adoption in Small and Medium Sized Enterprises
Authors: Wang Heng , Hou Jin Chang
Published: April 2011

E-commerce have become increasingly popular in our everyday business and personal lives. For many organizations, competitiveness in e-commerce requires a successful presence on the web. This paper provided an insight about factors affecting business-to-business e-commerce adoption and implementation in small and medium-sized enterprises. The research is based on a wide literature review, focused on proposing a theoretical model of technological, environmental and organizational factors influencing e-commerce adoption and implementation. The results of the empirical research provided indication to small and medium-sized enterprises interested to adopt business-to-business e-commerce, large companies interested to conduct e-commerce transactions with small and medium sized companies and policy makers.
Application of Multifactor Ranking Method in Industrial Project Site Selection
Authors: Liu Ai Fang , Guo Shu Rong
Published: April 2011

Industrial construction project site selection, which shall focus on analyzing economical factor of much difference from various plans with consideration of the influences by social political, economical and environmental factors, put forward Multifactor Ranking Method. It combines the Analytic Hierarchy Process and Distance Comprehensive Evaluation Method based on Spatial Statistics together with working out weight of each factor by Analytic Hierarchy Process firstly, ranking the relative proximity of decision object by Distance Comprehensive Evaluation Method secondly, making best decision subsequently. Lastly, it is applied to ranking the advantages and disadvantages of the alternative sites of a power plant project and the results proved to be objective and effective.
Design of Wireless Automatic Meter Reading System
Authors: Sai Yao Zhang , Ma Ru Jian
Published: April 2011

Community property management in metering and charging of resource and energy consumption, such as water, electricity and gas charging are a time-consuming, laborious, tedious and monotonous work. It also needs a large amount of computing and the computing requires high accuracy because the dispute will affect the social security easily. The current used meter reading and charging systems for resource and energy consumption of household are analyzed in this paper. The wireless automatic meter reading and charging systems are also discussed. A design scheme is proposed based on short-range wireless meter reading communication technology. The combination of CC1100 radio frequency module and GPRS network is used in the scheme. The system has the characteristics of low in price, simple in structure and good stability.
A Trace Inequality for Symmetric Nonnegative Definite Matrices
Authors: Wang Shi Qing
Published: April 2011

Trace inequalities naturally arise in control theory and in communication systems with multiple input and multiple output. One application of Belmega’s trace inequality has already been identified [3]. In this paper, we extend the symmetric positive definite matrices of his inequality to symmetric nonnegative definite matrices, and the inverse matrices to Penrose-Moore inverse matrices.
k-NN Based MCS Selection in Distributed OFDM Wireless Networks
Authors: Meng Qing Min , Gu Xiong , Tian Feng , Zheng Bao Yu
Published: April 2011

Cognitive radio is seen as an intelligent wireless communication system that can learn and adapt the surrounding environment. Cognitive engine is the core component of implementation of cognitive radio. Information in knowledge base of cognitive engine can be obtained by using of machine learning. In this work, we consider wireless networks with clustered nodes and OFDM physical layer and present a combined sub-channel selection and modulation and coding rate selection based on k-Nearest Neighbor classification algorithm. Computer simulation results show that, in frequency selective fading channel, the scheme makes a new network node easy to choose appropriate modulation and coding rate.
Simulation of Geometry and Heat Transfer in a Thin Wall Produced by Direct Laser Powder Deposition
Authors: Kheloufi Karim , Amara El Hachemi
Published: April 2011

A three dimensional model for direct laser powder deposition process is developed to simulate the geometry and the thermal field in building a single-bead wall (thin-wall). This model was employed using the Fluent commercial code to which several modules were appended (User Defined Functions UDF). The temperature distribution, the geometrical features of the generated structure, and thermal cycles have been carried out. We show that the results analysis can provide guidance for the process parameter selection in LPD. , and develop a base for further residual stress analysis.
Modeling the Formation of Periodic Nanostructures on Solid Surface Induced by Femtosecond Laser Ablation by Particle-in-Cell Method
Authors: Djouder Madjid , Itina Tatiana E. , Lamrous Omar
Published: April 2011

In this paper, we simulate by the particle-in-cell method (PIC) the mechanisms of femtoseconde (fs) laser interactions with a metallic or semiconductor target. Our aim is to identify the mechanisms that are responsible for surface nanostructure formation when laser fluences are close to the ablation threshold. For this purpose, we use a theoretical approach, which considers the solid as a gas of free electrons in a lattice of immobile ions. As a result, the simulations shown that those nanostructures occur during the first moments of the interaction and are due to the inhomogeneous distribution of the density of the electrons
Study of API 5L X52 Carbon Steel Treated in Oxygen Plasma Discharge
Authors: Demri Boualem , Mansour Dalila
Published: April 2011

Oxidation in oxygen plasma of API 5L X52 carbon steel samples was realized in glow electric discharge, under primary vacuum of 8.10-2 torr for a period of 50 hours, under tension discharge of -1000 V and a sample current of 15 mA. The treated steel samples have been characterized through microscopic observations; optical microscopy and Scanning Electronic Microscopy (SEM) coupled with Energy Dispersive Spectroscopy (EDS) microanalysis. These observations permit to reveal microstructural modifications arising from the treatment in oxygen plasma discharge. X Rays Diffraction (XRD) investigation has been realized for the crystallographic characterization of surface modification. The steel samples submitted to the glow discharge show a good surface aspect, with blue black color. Microscopic observations of samples at different stages of treatment, show structural modifications of steel’s surface. SEM observations show surface morphology changes after treatment, and EDS analysis reveal an oxygen implantation within the steel. XRD investigation shows the formation of an iron oxide (Fe2O3) on the surface of the steel specimens after treatment.
Experimental Study of Evolution of NO and NO2 in a Positive Corona Discharge
Authors: Medjahdi I.S. , Lemerini M. , Pontiga Francisco , Moreno H. , Ferouani A.K. , Medjahdi R.D.
Published: April 2011

In this work, we present an experimental study of the reduction of NO and the creation of NO2 by positive corona discharge in N2/O2 mixture (95% N2, 5%O2), where 200ppm of NO are injected at atmospheric pressure. The corona discharge was generated using a wire- to- cylinder reactor. The applied voltage is 5kV and 7 kV and it was maintained for  50 minutes. Ultraviolet absorption spectroscopy operating in the wavelength range 190-330 nm was used to identify the species and quantify their concentration, According to Beer Lambert law who give concentration from absorbance. The temperature was maintained constant for 300K. The obtained resultant show nitrous oxide NO has been destroyed with the augmenta¬tion of corona current. We note different times to NO removal, 50 minutes at 5 kV and 20 minutes at 7 kV. And we observe the creation of NO2 and the apparition of ozone O3.
Photo-Detachment of H- in Magnetized Cascaded Arc Hydrogen Plasma
Authors: Elhamali Suleiman M. , Bouzed A. , Hashkel Anwar M.
Published: April 2011

In the blue region of the magnetized hydrogen plasma the population inversion has been observed. Possible reaction responsible for the inversion is molecular ion recombination that gives an overpopulation of states 4, 5 and 6. This inversion can be eliminated by using Nd: YAG laser, λ=1064 nm (1.15 eV) to photo-detach H- (0.75 eV). Approximately 60% of Hα and less than 10% of Hβ have been destroyed.