bluuebunny/crossref_metadata_2025 huggingface dataset:
Reliability Evaluation for Binary Directed Tree-Structured Systems Based on Terminal Failure Limit-Value
Authors: Chen Wei , Liu Peng
Published: June 2011

This paper evaluates reliability of binary directed tree-structured systems based on terminal failure limit-value. For the difficult problem with complex structures and directed transitive relation, the paper describes nodes in the tree system using set algebra, and uses set operations to compute a combinational mode of failed nodes, and then describes it with family of sets. On that basis, an effective algorithm is shown, and a numerical example is given to illustrate the algorithm obtained in the paper.
The Automatic Control System Applied to Food Packing Production Line Based on STEP7-MICRO/WIN
Authors: Wang Wei , Ren Jian Hua
Published: June 2011

In this paper， we introduce a food production and packaging system. This system includes many processes, namely, mixing, blending, molding, drying, packaging, and relates to multiple devices. To ensure the quality of food production and packaging, it needs coordination of all procedures and controls based on process requirements to achieve different objectives, so we use PLC centralized control in the food production and packaging system. According to the control object, we allocated the PLC address and choose the PLC of Siemens S7-200. On the basis of control tasks, we designed a control flowchart and programmed for PLC control system of Siemens S7-200 using STEP7-MICRO/WIN programming software .The practical applications have proved the good results.
Multi-Objective Location Model Research and Application in the City Emergency Logistics Based on Different Product Materials
Authors: Liu Hong Zhi , Liu Li Na
Published: June 2011

We build up a multi-objective location model of emergency logistics center location, The model combined the construction cost of emergency logistics center with the point of shortest distance from the emergency needs of the logistics center to the limited demand, so that meet the different deployment strategies. We get satisfactory results in the practical by using parametric programming method for solving multi-objective model and verifying for the analysis of examples of this multi-objective decision. The model take into account the cost, efficiency and fairness, combined with the traditional model of coverage (covering model, gravity model and the P-median model).To meet the city's emergency different deployment strategy, the multi-objective location model solve and verify by the parametric programming method and some examples.
Study on DC Filter’s Performance of Different Match Properties in Materials Engineering
Authors: Zhang Li Xia , Kang Wei , Zheng Qing Qing
Published: June 2011

When the cell pack is tested, it need low ripple charging current to ensure the tester accuracy. It is very necessary to set proper DC filter which has excellent filtering characteristic and wide input/output range. The inner resistance of a cell pack is very small but the system is indefinite. If the DC filter is designed by the type of traditional matched filter, the flat-fading would inevitably occur. This would reduce the power transmission efficiency. This paper discussed the design philosophy of the non-matched filter and proposed a non-matched Chebyshev DC filter design method aimed at the special resistive-capacitive property of the cell pack. The method is proved to be correct and feasible by simulation.
Synthesizing Effect Model Based on Quasi-Linear Function in Intelligent Materials System
Authors: Luo Shu Xin , Li Jing , Li Fa Chao
Published: June 2011

Interval number is a common tool to describe uncertain information. Its ranking method plays a role in solving uncertain decision-making problems. In Ref. [1], by analyzing the feature and shortcomings of the current ranking methods, we proposed a ranking method based on quantity property, and systematically discussed the structure criteria, based on it, in this paper, we firstly introduce the definition of quasi-linear function and establishan order model of interval numbers based on it; secondly, with a specific example, we further analysis the property the order structure built in Ref. [1]. The result shows that this method can merge decision making consciousness into the decision making process effectively. In complex optimization system, decision making and other fields have a wide range of applications.
The Study and Application of Beating Degree’s Soft-Measurement Technology Based on FBP Algorithm in Product Materials System
Authors: Li Yan , Xu He Jin
Published: June 2011

Beating degree can not be measured on-line, study shows that beating degree is associated with pulp consistency, pulp flow rate, pressure of inlet pulp, the energy consumption of refining, the refining time etc. A beating degree’s soft-sensing model based on fbp algorithm was established .It was applied in beating degree’s control successfully. The actual result shows that this method can realize beating degree’s accurate measurement and lays the foundation for beating degree’s optimal control.
The Study of PSTN P2P Protocol in Distributed Multi-Database System in Intelligent Materials System
Authors: Song Xin Ai , Liu Tian Shi , Zhang Liu Mei
Published: June 2011

In intelligence materials system, sensor nodes may typically scattered around the targeted surveillance area. Therefore, all nodes within such network are responsible for collect and route data from sensors to receivers. Along with the development of intelligent materials databases, communication speed and efficiency may strongly affect the performance of distributed multi-database system. This paper firstly introduces a p2p distributed multi-database system architecture and its characteristics, moreover explains the node communication mechanism. Secondly, it proposes a protocol with its 4-layer structure and respectively explains the layer design ideas and functionalities. Finally, by analyzing the transmission efficiency and speed, the paper proposes the practicability and validity of protocol.
Research on the Small and Medium Sized Enterprise Informatization’s Model and Strategy of Development
Authors: Xie Jian Min , Qin Qin
Published: June 2011

In the open international competitive environment, information technology has become the most critical competitive advantage in gaining access to one of the means. For the small and medium-sized enterprise, the information can improve the management capacity of enterprises, extended enterprises market; enhance the market's rapid response capability and adaptability. This article in analyzes in the small and medium-sized enterprise informationization advancement in the objective demand foundation, studied the small and medium-sized enterprise informationization to construct and to manage the pattern which and the strategy choice question in the process met; to affected the small and medium-sized enterprise informationization using the SWOT law the correlation factor to carry on the comprehensive thorough essence to analyze.
Efficiency Evaluation on Listed Power Company Based on Data Envelopment Analysis
Authors: Li Shi Hua , Zhao Shi De
Published: June 2011

The relationship between power industry and the national economic development are being more and more closely associated. The power companies supported by the government policy and attention in the stock market has gotten the developing priority, and has also been becoming one of important blocks on the stock markets. Use DEA method, select the appropriate input and output indexes, analyze the relative efficiency of the power companies and give evaluation of the results. Not only power companies, the majority of the shareholders, but also political decision-makers could get references from DEA evaluation.
Development of Stretchable Conductors by Depositing Gold Trace on Pre-Stretched Silicon Thin Film
Authors: Zhou De Bao
Published: June 2011

Stretchable conductors have more applications than traditional non-stretchable ones. Some of the examples can be the conductors in a bendable laptop or a bendable cell phone. This paper will focus on the manufacture of a stretchable conductor for the development of a pressure sensor system for the measurement of the body contact force of a tubular device with its environment, such as colonoscope. The conductor in this application will need to stretch up to 50% without the decrease of conductivity. The stretchable conductor is made by depositing a conductive material with good elasticity, such as gold trace, to a pre-stretched substrate, such a silicon rubber thin film. An Electron Beam Evaporator machine is used to make the deposition. Experimental results show that the conductivity of the conductor will keep unchanged even the stretch is up to 100%.
Moving Objects Detection Based on Gaussian Mixture Model and Saliency Map
Authors: Lin Li Li , Chen Neng Rong
Published: June 2011

The background modeling method based on the Gaussian mixture model (GMM) is usually used to detect the moving objects in static background. But when applied to dynamic background, for example caused by camera jitter, the wrong detection rate of moving objects is high, and thus affects the follow-up tracking. In addition, the method with GMM can not effectively remove the moving objects shadow region. This paper proposes a moving object detection method based on GMM and visual saliency maps, which not only can remove the disturbance caused by camera jitter, but also can effectively solve the shadow problem and achieve stable moving objects detection.
The AE Identification Methods to Welding Defect by Wavelet Analysis
Authors: Dou Yan Tao , Xu Xiao Li , Cai Xiao Jun , Wu Guo Xin , Sun Zhi Xiang
Published: June 2011

In the engineering applications area, welding defect is a major hidden danger of structure security. the bending failure process of welded specimens is detected by using AE technique and the data samples of typical welding defect source are collected, and by using wavelet technique the typical AE datas acquired through experiment are analyzed, characteristic information of the typical acoustic emission source such as electromagnetic noise, plastic deformation, micro-crack initiation, crack unsteady expansion and fracture, etc are extracted. A serial acoustic emission source identification methods based on the energy spectrum coefficients of wavelet are established and which can realize accurately distinguishing of different acoustic emission sources, so as to provide a theoretical basis to detect equipment welding defects by acoustic emission technology dynamic in engineering practice.
Design of the Monitoring and Matching System of the Visualization Battery Unit Based on PC Machine
Authors: Ding Dian Kuan , Wan Yi
Published: June 2011

By analyzing the application of the battery, the battery voltage monitoring system, lower computer and host computer communication system, and host computer visualization VB6.0 monitoring with battery group platform are designed based on multi-channel multi-MCU and the PC-based interactive respectively. In addition, the corresponding softwares are designed to achieve optimization of static and dynamic parameters matching. Practice has proved that the design has a fairly value for further perfecting the optimization of the battery matching.
Studies on MPPT in the Grid-Connected Photovoltaic Power Generation System Application
Authors: Ding Dian Kuan , Li Li Xin , Wan Yi , Xue Qi
Published: June 2011

A set of PV grid-connected controlling system basing on FPGA and MCU is designed after the study of PV grid-connected system in this paper. The function of FPGA is to control the inverter main current, and the MCU is used to realize the MPPT technology. It is very effective after testing.
Generalized Fuzzy Sample DEA Model and its Application in the Evaluation of Projects
Authors: Mu Ren , Ma Zhan Xin , Cui Wei , Wu Yun Morigen
Published: June 2011

Evaluating the performance of activities or organizations by traditional data envelopment analysis model requires crisp input/output data. However, in real-world problems inputs and outputs are often with some fuzziness. To evaluate DMU with fuzzy input/output data, researchers provided fuzzy data envelopment analysis (FDEA) model and proposed related evaluating method. But up to now, we still cannot evaluate a fuzzy sample decision making unit (SDMU) for FDEA model. So this paper proposes a generalized fuzzy DEA model which can evaluate a sample decision making unit and a numerical experiment is used to illustrate this model.
Impact of Cutting Parameters on Surface Roughness in Milling Aluminum Alloy 6061 Using ANN Models
Authors: Liu Yu Mei , Jiang Zhao Liang , Li Zhi
Published: June 2011

The surface roughness is difficult to estimate in machining, especially for weak stiffness workpiece. So, prediction model of surface roughness using artificial neural network (ANN) is developed. This model investigates the effects of cutting parameters during milling Aluminum alloy 6061. The experiments are planned with four factors and four levels for developing the knowledge base for ANN training. Three-dimensional surface plots are generated using ANN model to study the effects of cutting parameters on surface roughness. The analysis reveals that cutting speed and feed rate have significant effects in reducing the surface roughness, while the axial and radial depth of cut has less effect. And the variations of surface roughness are highly non-linear with the cutting parameters.
Two Welding Models Application on Fatigue Analysis for Front Sub-Frame
Authors: Xu Jiang Tao , Guo Rui Xia
Published: June 2011

This article firstly established two finite element models of seam weld and spot-weld for the front sub-frame, then used the two models for seam weld and spot weld fatigue simulation analysis, next cooperated with bench test results for verification. After the above steps, we not only found the weak portion of the front sub-frame, but also provide reference for both optimum design and improving the bench test design.
An Improved Texture Compression Method for Graphics Hardware
Authors: Chen Hai Ying , Zhou Yin Yin
Published: June 2011

In this paper, we proposed an improved texture compression method for graphics hardware. We first give a detail introduction for the texture compression methods which are popular now. Then, an MIPMap-based texture compression method is proposed that is hybrid compression scheme. For smooth area, we can only use 2Bytes to represent the 4*4 pixels block by bilinear interpolation. Otherwise, we will use iPACKMAN algorithm to deal with the noise areas. Actually, this method is feasible to be implemented by hardware since it is very simple. Experimental results show that our method can achieve high compress ratio and high image quality.
Mine Fan Fault Diagnosis Based on EMD and SVM
Authors: Leng Jun Fa , Jing Shuang Xi
Published: June 2011

In this research, a new method based on EMD and SVM for mine fan fault diagnosis is introduced. With EMD, fault feature can be extracted quickly and accurately, and taken as the input samples for SVM with the outstanding non-linear pattern classification performances. 5 two-class SVM classifiers are designed in order to classify and diagnosis 5 typical fault patterns of mine fan. The result of this research shows that the integrative method of EMD and SVM is very fit for the intelligent diagnosis and fault patterns recognition, and it will lead to the possible development of an automated and on-line mine fan condition monitoring and diagnostic system.
Analysis of Smart Grid Affecting Electricity Market in China Based on Smart Materials
Authors: Li Hong Ze , Guo Sen , Wang Bao
Published: June 2011

China’s electricity market reform has been on almost 10 years, and the proposition of constructing "Strong Smart Grid” in China has aroused widespread concerns, and also made an impact on electricity market. To assess the impact on electricity market, considering the current situation of China's electricity market, based on smart materials, analyze the risks of electricity market from constructing smart grid in terms of low-carbon power accessing grid, wide-area interconnected power system and large-capacity batch of green energy accessing grid, and also propose some requirements for electricity market from the perspective of power quality, demand side management and trading platform. Developing smart grid will promote China’s electricity market reform.
Wireless Sensor Networks Security Issues as Smart Materials Systems
Authors: Chen Ying , Shu Jian
Published: June 2011

With the wide application of wireless sensor networks, their securities become research hotspot. Firstly, introduced the limiting factors of wireless sensor networks, summarized the security attack types and gave prevention strategies accordingly. Secondly, proposed the security technologies of wireless sensor networks, these technologies include key management and distribution, authentication and verification, and data fusion encryption technologies. Finally, discussed further security research interests.
A Brief Study on a Novel Texture Spectrum Descriptor for Material Images
Authors: Wu Xiao Sheng , Sun Jun Ding
Published: June 2011

The local binary pattern (LBP) operator has been proved to be theoretically simple yet very effective for texture description. However, it lacks the full description of texture in a region and produces a rather long histogram. A novel texture spectrum descriptor was proposed to alleviate these limitations in the paper. It uses the relation of 3 pixels in an 8-neighborhood, the center and the center-symmetric pixels, to define the local texture patterns. The new operator fully uses the texture information contained in the 8-neighbourhood and produces a rather short histogram. On the other hand, the new operator also has the same desirable properties as LBP, such as tolerance to illumination changes and computational simplicity. Experimental results demonstrate that the new descriptor achieves better performance than the conventional LBP with a rather short histogram
Simulated Annealing Optimization on Valve Spring of Diesel Engine
Authors: Xi Ping Yuan , Zhu Jiang
Published: June 2011

Valve spring of diesel engine is the important components in the valve assembly. Valve spring does not undertake cyclic variable loading at work, but also must overcome the additional load caused the vibration from valves at high speed. The simulated annealing algorithm has become one of the important tools for solving complex optimization problems, because of its intelligence, widely used and global search ability. In order to reduce the impact of the negative inertia force of Valve spring on valve timing in the high-speed movement, and save materials and reduce costs of spring. the objective function should be specified that the mass of a spring inclines to minimum based on meeting allowable strength.
Research on 2-D SDCT Performance Based on Transform Basic Matrix
Authors: Sun Wen Bang , Chen He Xin , Chen Hong , Sun Wen Bing
Published: June 2011

Now, 2-D DCT has been used widely. But the 2-D DCT is operated by two-time1-D DCT successively, which can’t embody the space characteristic of 2-D transform well. To overcome such drawbacks, the paper proposed 2-D SDCT operation method. Firstly, some matrix operation principles are defined. Then, the transform basic matrix used for SDCT operation was build and the operation principle of SDCT is described in detail. Finally, the performance of 2-D SDCT was described systematically. The theoretical analysis shows that the proposed method makes 2-D DCT succinct to express, easy to comprehend and convenient to operate.
Augmented-Stability Controller Design for a UAV’s Longitudinal Motion
Authors: Xing Xiao Jun , Yan Jian Guo
Published: June 2011

With the purpose of overcoming the defect that unmanned air vehicles (UAVs) are easily disturbed by air current and tend to be unstable, an augmented-stability controller was developed for a certain UAV’s longitudinal motion. According to requirements of short-period damping ratio and control anticipation parameter (CAP) in flight quality specifications of GJB185-86 and C*, linear quadratic regulator (LQR) theory was used in the augmented-stability controller’s design. The simulation results show that the augmented-stability controller not only improves the UAV’s stability and dynamic characteristics but also enhances the UAV’s robustness.
Analysis of Economic Loss Caused by Ground Material Subsidence
Authors: Lei Wei
Published: June 2011

Ground subsidence is one of the environmental geological problems today which arises in the process of world urbanization and can't be ignored. It is related closely to the local economic activities, and causes great hazard to the sustainable socio-economic development. Therefore, this problem has been paid much attention to by the whole society for a long time. The author of this paper analyzes the urban ground subsidence mechanism by adopting Terzaghi's effective stress principle and one-dimensional consolidation theory, and puts forward measures to prevent and control the ground subsidence.
A Kind of Combination Feature Division and Diversity Measure of Multi-Classifier Selective Ensemble Algorithm
Authors: Wang Yan , Wang Xiu Xia , Lai Sheng
Published: June 2011

In ensemble learning, in order to improve the performance of individual classifiers and the diversity of classifiers, from the classifiers generation and combination, this paper proposes a kind of combination feature division and diversity measure of multi-classifier selective ensemble algorithm. The algorithm firstly applied bagging method to create some feature subsets, Secondly using principal component analysis of feature extraction method on each feature subsets, then select classifiers with high-classification accuracy; finally before classifier combination we use classifier diversity measure method select diversity classifiers. Experimental results prove that classification accuracy of the algorithm is obviously higher than popular bagging algorithm.
Analysis of Weifang City’s Economic Development Competence According to Certain Economic Materials
Authors: Zhang Guang Yi , Zhao Tian Peng , Dong Wan Yan
Published: June 2011

Urban economy has been deemed to be the leading power for regional economic and social development and it has everything to do with citizen income increase, local financial strengthen and organizational economic vigor. Weifang has a sound geographic position for it shares the common border of coastal and inland cities, which is beneficial to the whole provincial economic development. AHP methodology is applied to construct the evaluation system for urban economic development competence and an index system developed out of it is employed to compare the economic development competence from 2005 to 2009. Finally, the analysis of problems and weaknesses occurred thereby in the past five years is made, accompanied by constructive comments and suggestions. In recent years, rapid development has made Weifang among the tops in total economic volume in Shandong.To research Weifang’s economic development competence, to clarify Weifang’s regional economic development strategy, and to seize the opportunity to develop Weifang are meaningful to Weifang and Shandong.This article uses multiple statistic methods and social economic statistic software SPSS to standardize the indexes of Weifang from 2005 to 2009. It uses AHP to calculate each index’s weight, and gets the final comprehensive score of its economic development competence, on the basis of which it analyze Weifang’s economy and find the weak points so as to strengthen its economic development competence by giving relative suggestions.
The CFD Modeling of Probe-Drogue Aerial Refueling Equipment for UAV
Authors: Yuan Dong Li , Xi Qing Biao , Li Wen Chao , Xing Xiao Jun
Published: June 2011

To research the automatic alignment problem in autonomous aerial refueling docking phase for UAV, by simulating the aerodynamic parameters of aerial refueling equipment the Probe-Drogue aerial refueling model was built. The three-dimensional graphics of the refueling hose intercepted segment, drogue and stable umbrella were drawn using CATIA, which were imported into GAMBIT for generating three-dimensional flow field grids. Then, the refueling hose intercepted segment model was calculated after setting the solution parameters in FLUENT for different flow angles and Mach number. At the same time, monitoring the convergence of the residuals, a group of stable aerodynamic parameters were obtained, which provided needed parameters for aerial refueling modeling.
Study on Driving System Based on EEG
Authors: Jiang De Rong
Published: June 2011

Driving System, which is programmed by C#, is a car driving manipulation to simulate the real car driving movement, obtain sense of simulation system. Obviously, Driving System has a lot of advantages as a driving system for fatigue detecting monitor. In driving system, there are three parts, which are the driving Environment, Data acquisition and Data analysis. Driving System can fulfill the interactivity and real time effectively, and has been used successfully in the drowsiness of driving, which can be familiarly analyzed with arithmetic of EEG.
The Provincial Network Planning Model Study Based on 0-1 Mixed Integer for Programming Tobacco Commercial Enterprise
Authors: Tong Xin Shun , Liu Shuang
Published: June 2011

In order to adapt to the trend of modern logistics, coordinate the planning of tobacco logistics across the province, and save logistics resource, lower logistics cost and promote the core competitiveness of tobacco logistics, we use the 0-1integer programming method to build the network planning model for tobacco business. To revise the objective function and limitation factor of general location model for tobacco industry, and to make overall planning for the distribution system across the province, and make it more cost competitiveness.
The Finite Element Analysis of Coupling Law of Stress Field / Seepage Field in Permeable Stratum Medium
Authors: Huang You Quan
Published: June 2011

The research of reservoir fluid-solid coupling theory, especially that multiphase fluid seepage caused by water injection and exploitation, the change of stress state and the coupling between the reservoir deformations. In recent years, it caused than the great interest of chinese scholars, one of the hot topics is become the reservoir engineering and related field of research. According to the basic theory of rock mechanics, fluid mechanics in porous medium, geologic mechanics, calculated mechanics and fluid-solid coupling seepage, a mathematical and numerical model of seepage field and stress field coupling is developed in porous medium and a computer program is designed with the method of finite element technique. The Coupling Law of depressurizing exploitation Seepage field /Stress field in porous medium is studied. By the method of numerical simulation the variation law of stress-strain with time and space around borehole of impermeable rock medium, variety law of rock physical properties parameters is studied. Results show that the change of stress and strain is due to the fluid pressure of change by caused, the fluid pressure is greater, and the Stress and strain change is bigger. So from the far field pore pressure can be seen in near bottom-hole formed bigger fluid pressure, to reservoir boundaries, fluid pressure quickly cut. So, from the pore pressure of far field Pp are 15 Mpa, Pp are 21 Mpa, and Pp are 24Mpa,we can see that bigger flow pressure formed at the well bottom nearby. To the boundary of reservoir, the flow pressure decreases very quickly.
On the Digital Design Using the Chinese Traditional Folk-Custom Color Culture Research
Authors: Zhou Yue Xi , Zhang Xi Miao
Published: June 2011

Based on economic and social development to discuss the application of traditional folk color culture in digital design, its purpose is to increase the national culture value in the digital design. Firstly, using Game theory analyzes the necessity of the application of traditional folk color culture in the digital design. Secondly, using computer graphics and mathematical language carry on the culture innovation of the traditional folk-custom color culture. Finally, explains practical application of the traditional folk-custom color culture in digital design. Through practice, proves the feasible of that the traditional folk color culture is used in the digital design.
Design of a Solid Rocket Motor for Characterization of Spinning
Authors: Wang Zai Cheng , Jiang Chun Lan , Li Ming
Published: June 2011

Although the rocket propulsion technologies have been used for several decades, the traditional motor can not meet the special rotating requirement. A kind of spinning solid rocket motor (SSRM) which used as power device of some kinds of dispenser was introduced. This kind of motor has the structure characterization for tangential nozzles. Its design scheme and prediction of interior ballistic performance were discussed. And the main factors should to be considered in design were analyzed comprehensively. In order to research working performance of the SSRM static test was carried out. The calculation and test results indicate that the design can satisfy general requirement of its application normally.
Research on Contact Characteristics of the Foundation for Wind Turbine Generator System
Authors: Jiang Li , Xu Xin Yong , Zhang Di
Published: June 2011

The 3-D FEM numerical model of foundation for wind power turbine generator system is created, based on the platform of ANSYS. The non-linear contact between the foundation stub part and concrete is introduced. The internal mechanical characteristics and laws are studied when the tower structure is bearing the random direction wind load. The laws of the settlement and deformation of the tower are discussed and the contact status of contact areas is attained. The numerical analysis which considers the contact status and material nonlinearity is more rational. The research results provide the indigenous design and optimization of our nation scientific basis.
Cold Fusion Experimental Research on Repairing Shaft of Automatic Transmission
Authors: Yan Hong Juan , Li Jiang Ying , Liu Feng Bin , Qu Min
Published: June 2011

The cold fusion at room temperature is used to repair the shaft of automatic transmission. In the experiment, the low-carbon steel, the high-carbon steel and 65Mn steel were selected as restorative materials. The microstructures of shaft repaired with different materials were observed by the scanning electric microscope (SEM) after the shafts were repaired. The results show that the microstructure of shaft which was repaired by the high-carbon steel and 65Mn steel is martensite that has high hardness and better wear resistance. The interface of the matrix and filled material is metallurgic combine. The cold fusion can improve the surface properties of the matrix when the suitable material is selected as restorative material.
Numerical Computation of Grazing Bifurcation for Periodic Orbit
Authors: Hu Qing Wan , Liu Yong Cai
Published: June 2011

In this paper, a numerical algorithm for computing grazing bifurcation of periodic orbit in autonomous planar systems is derived and analyzed. We propose an analytical condition which to ensure the orbit quadratically intersects the switching manifold. Based upon this, we take into a new phase condition which ensure there is a branch of periodic orbits. The nondegenerate condition with respect to its bifurcation parameter is presented to ensure the defining equation well posed. A numerical simulation is carried out for the bifurcation diagram of the van der pol system, which agrees with analytical results very well.
Environmental Efficiency Measurement Based on Cross-Efficiency DEA Models in Power Industry
Authors: Niu Dan , Guo Shu Yu
Published: June 2011

Air pollution becomes more serious with the development of industry. Taking the “sustainable development” into account, more and more corporations consider environment as an important feature in their products. Because coal is the main consumption of power industry and coal combustion can produce air pollution seriously, how to measure the environmental efficiency in power industry becomes more significant. Although there are many of synthetic evaluation methods were proposed for measuring the green degree of production, such as AHP (Analytic Hierarchy Process), PCA (Principal Components Analysis), DEA (Data Envelopment Analysis) etc., the shortcomings of each method for measure green performance are appeared in practical application. A peer appraisal methodology, denoted as cross-efficiency DEA, was applied in this paper to measure the environmental efficiency of power industry in US.
The Research of Constructing Rough Concept Lattices Model
Authors: Xu Hong Sheng , Wang Ting Zhong
Published: June 2011

Formal concept lattices and rough set theory are two kinds of complementary mathematical tools for data analysis and data processing. The algorithm of concept lattice reduction based on variable precision rough set is proposed by combining the algorithms of β-upper and lower distribution reduction in variable precision rough set. The traditional algorithms aboutβvalue select algorithm, attribute reduction based on discernibility matrix and extraction rule in VPRS are discussed, there are defects in these traditional algorithms which are improved. Finally, the generation system of concept lattice based on variable precision rough set is designed to verify the validity of the improved algorithm and a case demonstrates the whole process of concept lattice construction.
A Theoretical Study on the Transfer Impedance of a Plane Current Probe
Authors: Zhang Bing Wei
Published: June 2011

This paper theoretically analyzes the transfer impedance of a plane current probe. The plane current probe is an effective device that is used to measure conducted current flowing on the surface of a metal structure. One of the hot topics for plane current probe is to obtain its transfer impedance. Most research concentrates on designing calibration devices and measuring the values of the transfer impedance. However, they all do not carry out theoretical study on transfer impedance. In this paper, the equivalent circuit of the signal detection system of the probe was established based on a transformer model. Furthermore, the expression of transfer impedance was derived from the equivalent circuit. The curve shape of transfer impedance obtained from this study has a good agreement with the measured ones. This fact validates the equivalent circuit and the theoretical formula. Subsequently, influence on the value of transfer impedance was analyzed based on the expression with change of some parameters, e.g., turns of coil winding, dimension of ferrite core, permeability of ferrite core, distributed capacitance. The result gained from the above analysis will provide guidance on the design and application of the plane current probe.
Study on the Recognition Algorithms of Hole and Drawing Boss Features in Auto Body Panels Based on UG
Authors: Li Di , Kang Wen Qian , Guo Peng Wei
Published: June 2011

Feature recognition is the key technology in establishing auto body panel CAPP system. Hole features and draw boss features has been classified according to their forming and function properties in this paper. Recognition algorithms have been developed for hole feature and drawing boss feature, which can also distinguish two dimensional hole and three dimensional hole, and differentiate circle hole and non circle hole automatically. The algorithms can also recognize the drawing bosses and judge whether the boss has holes. Furthermore, the algorithms can give out the parameters of hole and drawing boss recognized, such as radius of circle hole, minimum radius of curvature of shaped hole’ boundaries, the parameters of hole in the drawing boss, the edges’ ID of the hole and the surfaces’ ID of the boss.
The Analysis and Design of University Examination Management System
Authors: Li Ning , Guo Mei , Wang Jian Ping
Published: June 2011

Examination management system is a system of scheduling classrooms for college students to take normal examinations and rehabilitation examinations under the circumstance of credits. The system is divided into foreground and background, and the former has the functions to inquire and display examination information, while the latter has the functions to complete the arrangement of the examination messages. And it finally generates target database for the foreground, thus meeting the needs of the work for the educational administration department, overcoming the insufficiency of manual arrangement, improving the working efficiency, reducing the errors to meet the present work requirement.
PEG and ODA as Composite Templates to Prepare Porous TiO2 Films by Sol-Gel Method
Authors: Zhang Wen Jie , Bai Jia Wei
Published: June 2011

Porous TiO2 films were prepared through dip-coating on glass substrates using composite templates of PEG and ODA. Photocatalytic activity of the photocatalyst was evaluated by measuring removal rate of aqueous methyl orange under UV light irradiation. The addition of composite templates had obvious influence on surface morphology of the films. Layered and porous structures formed in the surface due to the function of templates. When the amount of PEG in the composite template increased from 0.1 g to 1.9 g, adsorption edge of the films moved to longer wavelength region. When the amount of PEG increased to 1.0 g, there were sharp decrease of specific surface area and cumulative pore volume. The improving photocatalytic activity as a result of addition of PEG can be noticed.
Constructing Domain Ontology Based on Fuzzy Set and Concept Lattice
Authors: Wang Ting Zhong , Xu Hong Sheng
Published: June 2011

The major content in FCA is to extract formal concepts and connections between them from data in form of formal context so as to form a lattice structure of formal concepts. Fuzzy set theory and fuzzy logic are acknowledged as an appropriate formalism for capturing imprecise and vague knowledge. The paper offers a methodology for building ontology for knowledge sharing and reusing based on fuzzy concept lattices union. This paper makes up these defects by applying formal concept analysis theory and fuzzy sets to construct concept hierarchies of ontology, and the experiments shows the CPU Time in the attribute numbers, indicating that FFCA is superior to FCA in building the ontology of semantic web.
The Influence of the Grinding Force to the Material Removal Rate in the Heavy Load Honing
Authors: Guo Jian Ye , Yu Chao , Cai Guang Qi
Published: June 2011

This paper took the grinding force in the heavy load honing as the object to research, it mainly analyzed the influence of the grinding force to the material removal rate. First the mathematical model of grinding force was established from starting with the honing pressure. Then the mathematical model of material removal rate was established according to the relationship between material removal volume and honing pressure. Finally the influence of the honing pressure to the material removal rate was analyzed with the aid of software. The results of this paper have important theoretical significance to optimize the processing technology of heavy load honing and further enhance the machining precision and the honing efficiency.
Imprecise DEA Model Based on TOPSIS
Authors: Xu Ji Heng , Li Ling , Liu Jian Yong , Fu Cheng Qun , Zheng Ji Lin
Published: June 2011

In view of the defect that TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) can not deal with imprecise data properly in multiple criteria decision making. And the weights are often hard to reflect the fact because of subjective preference of decision makers. We proposed a hybrid model combines TOPSIS and imprecise DEA model to improve the disadvantages. Ideal DMU and anti-ideal DMU were built, and the corresponding positive ideal point and negative ideal point were established. Imprecise DEA was set up and an upper-lower limit method is utilized to formulate the imprecise efficiency scores of the two hypothetical DMUs. Based on the distances between DMU0 and the two hypothetical DMUs respectively, imprecise relative closeness was formulated to rank the superiority of all DMUs. The imprecise DEA model based on TOPSIS can avoid too subjective weights and make the evaluation more rational. A numerical example indicated the efficiency of the hybrid measure.
Study of the Second Order Sensitivity of the Fiber Bragg Gratings
Authors: Zhang Gui Hua
Published: June 2011

According to the Bragging equation, the general mathematical formulas of the temperature change error and the strain error are got under the consideration of the second-order temperature sensitivity and the second-order strain sensitivity. The two error curves are given in the conditions of T = 20°C and e = 1000me.
Research on Simulation on Classroom Discipline Based on Complex System Theory with Scientific Teaching Materials
Authors: Zhao Chun Xiao , Zhang Xiu Fang , Gong Wei Na
Published: June 2011

Classroom discipline is a complex and variable dynamic process, classroom problem behavior always leads classroom discipline problem that will affect teaching quality. The simulation on classroom discipline of multiagent system based on complex system theory uses dynamic simulation platform NetLogo. The result of simulation shows that this method can reproduce the dynamics of discipline behavior’s three stages in ecological classroom. This simulation provides forceful support for the classroom discipline management of teachers.
Optimization and Design of Coal Mine Safety Supervision Information Flow Based on Internet/Intranet
Authors: Ren Da Wei , Gai Li Li , Yang Ning
Published: June 2011

Safety is the most important thing in coal mine production. There are many kinds of hidden dangers. In order to discover and eliminate the hidden dangers, the safety supervision becomes one of the most popular methods in current coal mine safety management, but there is not an unitive and normalized flow of collection, transmission, and processing and so on links of safety supervision information. Through applying the thought of business optimization, this paper formed a set of safety supervision information flow, supplied method and technical support for the coal mine management.
Study on Line Balancing for a Type of Lamp Assembling
Authors: Yao Wei Xin
Published: June 2011

This paper applied stopwatch to measure the work time of workstations on lamp assembling line. It studied issues effecting line production capability such as bottleneck workstations and superfluous capability. To overcome these shortcomings this paper suggests new line balancing schema. The schema includes reallocation of the work content, adjustment of the equipment and workers of each workstation. This improvement saves extra work shifts and reduces labor cost.
Research on Industrial Field Diagnostics and Management System Based on the IOT
Authors: Li Jing Zhao , Cheng Jian , Jin Xing
Published: June 2011

Industrial field diagnosis and management system based on the Internet of things which has advanced technologies and perfect functions was designed, through the analysis on industrial field diagnosis technology, information fusion methods and the framework of industrial the Internet of things,. Field fault detection, fault diagnosis and fault isolation and the structures of the sensing layer, the middleware layer and the application layer of the Internet of things of industrial as well as information fusion algorithms of data level, feature level and decision level were made to correspond to each other and site diagnosis knowledge, the Internet of things technology and information fusion algorithm were used to achieve remote monitoring center or handheld terminal on site for industrial site diagnosis and management functions. A good solution was provided for equipment manufacturers and industrial applying the Internet of things to do site diagnosis and management.
Study on ANN Based Forecast Model of Weather Disease
Authors: Wu Qian , Bi Jian Chao
Published: June 2011

Forecasting the weather diseases is a complex process with strong uncertainty. In order to improve the forecast accuracy, the paper proposed a sort of forecast model for weather diseases based on the artificial neural network. By means of ANN, lots of sample data could be trained so as to optimize the connecting weighting value of ANN, finally the forecast effect of weather diseases has been intuitively verified by experiment simulation. The factor resulted in weather diseases could be the following weather parameters, such as temperature of a day, relative humidity, air pressure, wind speed and so on. The paper takes respiratory disease treatment records as an example, the simulation result points out that it is consistent between the change trend of being sick and the actual situation. The study result shows that the model is reasonable and feasible, and could forecast weather disease more effectively.
The Content Acquisition Method of Libnids-Based University Network Public Opinion
Authors: Liu Cheng Qi , Xu Ying , Xu Jian Feng
Published: June 2011

It's one of the important management job of each university currently that discovering and monitoring the public network opinion in the campus.This article describes some of the major basic research of the university network public opinion discovering and monitoring system .First and foremost,this paper studies the method of capture packets on the outlet of campus network using Libnids network security development kit.Second,the contents of HTTP, POP3 and STMP packets are separately analyzed . Finally, The data obtained from the above steps provide the ideal data preparation. for the the university network public opinion discovering and monitoring system .
Another Attack on Tso's Short Signature Scheme Based on Bilinear Pairings
Authors: Kong Fan Yu , Wu Lei , Yu Jia
Published: June 2011

In 2009, R. Tso et al. proposed an efficient pairing-based short signature scheme which is provably secure in the Random Oracle Model. In this paper, we propose a new key substitution attack on Raylin Tso et al.’s short signature scheme. For a given message and the corresponding valid signature, the malicious attacker can generate a substituted public key. Everyone verifies the signature successfully with the malicious attacker’s substituted public key. Therefore, Raylin Tso et al.’s short signature scheme has a security flaw in the multi-user setting.
Research on the Integrated Testing System for Machine Parameters
Authors: Liao Gao Hua , Liu De Hui
Published: June 2011

A virtual instrument which has the function of data acquisition, displaying and saving, time domain analysis, frequency domain analysis and so on is developed successfully. It combines the developed VI software Labview with the software Star for modal analysis，and makes program for controlling the data acquisition card，to generate a file with a fixed data format，and applies this file in Star System to complete the experiment of modal analysis. In using VI (virtual instrument) for modal analysis of mechanical structure the system realizes data collection、save、display、analysis and processing. From actual working we can make a conclusion that it has the advantage of low-cost, stability, high rate, efficiency and reliability.
A Static Defect Checker for Interprocedural Array Bound
Authors: Chen Hong He , Jin Da Hai , Gong Yun Zhan , Liu Chuan Chang
Published: June 2011

Array bound is a concealed security defect. It generally cannot be found in the compiling progress, so it is extremely easy to cause a system crash. In this paper, we describe a static array bound checker, which concentrates on the defect of interprocedural array bound. This method is achieved by using the technology of static analysis, interval arithmetic and procedure summary, so it can detect the faults before the progress running. We finally give an experiment to verify the effectiveness and the high precision of this method. The method has been applied to practical projects.