bluuebunny/crossref_metadata_2025 huggingface dataset:
A New Model Reduction Method for Time-Delay Systems
Authors: Sun Ling Fang , Meng Xiang Hua , Zhang Fei Fei
Published: March 2011

A new kind of frequency model reduction method is proposed for unstable processes with time delay based on genetic algorithm. By adopting error between actual model and objective model, the model reduction process is transformed into minimal optimization process. To direct at time-delay problem, phase angle condition is introduced to increase degree of approximation between reduction model and actual model. Performance index is optimized with genetic algorithm to enlarge the applicability of traditional algorithm; the problem of model reduction is solved effectively with this method. Simulation results show that the reduced order model not only can approximate the original model but also can give good dynamic and static characteristics.
Development of the On-Line Monitoring System for Fuel Cell Voltage
Authors: Li Jing , Pan Hong , Zhang Shu Juan , Sun Ling Fang
Published: March 2011

According to the single battery's series structure in the fuel cell stack, we develop an on-line fuel cell voltage monitoring system, and realize VISA library functions’ call and operation data acquisition and storage successfully in the Delphi development environment. It’s introduced mainly that the monitoring principle, hardware structure, software design and the main feature. The actual application proves that this system has realized high-precision and real-time monitoring of the output voltage of the fuel cell for multi-channel, and has multi-condition operation by setting original parameters easily, thereby, the system has more applicability and well reliability.
The Study of Score Analysis for Secondary School Based on Data Mining Technology
Authors: Hao Shang Fu , Zhang Zhi Qiang , Wei Ying Hui
Published: March 2011

Nowadays, the contents associated with deep score analysis is rarely involved in the existing secondary teaching management software, which is not conductive to fully develop the information implied by these data,without scientific teaching evaluation. Using data mining technology, multiple aspects of student score distribution will be shown accurately, identifying the regular factors affecting score changes. Standard score as the mathematical model is adopted in the system, choosing the standard SOA architecture model, and a scientific and efficient score analysis system based on JAVA, JSP is developed. The system provides decision support information for academic departments to promote better teaching work, and finally improve the quality of teaching.
A Research on Dynamic Scheduling Algorithm of Real-Time Operating Systems on Uniprocessor
Authors: Shang Kun , Ding Huan
Published: March 2011

Real-Time operating systems not only request the logical correctness, but also request the correct computing results in a set time and the instant response to the real-time tasks. Therefore scheduling algorithms of real-time operating systems become an important measure to determine the real-time capability of a system. In this paper, we discuss the dynamic priority scheduling algorithm –Priority Inheritance Scheduling Algorithm. Then we analyze the algorithm from two aspects: description and schedulability.
Attempt to Discuss New Period View of Vocational Selection on University
Authors: Yang Jing
Published: March 2011

Vocational selection is an important section of vocational value, and impact on the vocational selecting action for university students. In this new period of the development on market economy here in China, the opinions and attitudes when university students make their vocational selection become diversified. Therefore, today at the situation of the increasing employment stress for university students, there’s necessity for us to deeply investigate the problems on vocational selection views existing on university students, thus discover some valid measures on the improvement of university students’ vocational selection education’s effectiveness.
A Highway Safety Level Evaluation Model Based on Matter Element Analysis
Authors: Qin Zhi Bin , Liu Zhao Hui , Peng Ye Ying
Published: March 2011

Previously, factors affecting freeway network safety under all operational circumstances have been divided hierarchically. Consequently, evaluation indicators for highway safety have been established on the basis of specification and twin statistic data. We present a novel multi-objective comprehensive evaluation method for the safe operation of segments of a highway network, together with the calculation formula, based on matter element analysis. In addition, the method is evaluated using an example.
GIM(1) Model and its Application
Authors: Zeng Bin , Zeng Wu Jun
Published: March 2011

Although the GM(1,1) model has been successfully adopted in various fields and has been demonstrated promising prospect. The paper adopts different form of grey model which is a supplement of the grey model and we call it GIM(1) model. On the analyzing the unequal GM(1,1) model the paper uses the difference quotient method to establish the unequal interval GIM(1) model. The examples prove the method in the paper is effective which improves the accuracy of the grey model. It provides an effective way for the grey system application.
Dynamic Data Transmission Technique for Expendable Current Profiler
Authors: Zhang Qi Sheng , Deng Ming , Wang Qi , Feng Yong Qiang , Yang Rui
Published: March 2011

As an expendable profiler in marine environment, XCP (Expendable Current Profiler) is mainly to measure current speed, direction and temperature. The paper is to research dynamic sinking data transmission technique for XCP. Data transmission medium is a varnished wire with diameter of 0.1mm, length of 1,800m and two parallel wires. Transmission characteristics of varnished wires can be tested by experiment and computation. The paper is to research and design a kind of base band transmission system and analyze its characteristics and performance. By utilizing digital base band signaling transmission technique, indoor and marine testing results show that designed data transmission system can reach 1,800m on varnished wires with diameter of 0.1mm if XCP probe sinks dynamically by speed of 4m/s and transmission speed is 2,400bps.
Dynamic Simulation Tests on Influencing Factors of Deep Tilling Plow Working Performance
Authors: Hu Xiu Chi , Zheng Lan Xia , Jia Lei , Song Xin
Published: March 2011

A plow surface-soil system dynamic simulation model was established, through MathCAD and ANSYS/LS-DYNA, on which the dynamic simulation tests were carried out by experimental design method. The discipline and mechanism about forming parameters of guiding curve and the plow working factors influencing on two targets, traction resistance and turn performance, were discussed and the factors optimization was made. The results show that tangent angle of guiding curve endpoints has a remarkable influence on two targets; in addition, it is benefit for reducing traction resistance and enhancing turn performance when the angle is large. Under the optimal condition, traction resistance is 4.40kN and turn performance reaches the optimal level 8.0.
Tribometer Design of Slide Bearings under Micro-Load
Authors: Hu Xiu Chi , Zhang Jian Zhong , Zhang Jun Hai , Zheng Lan Xia
Published: March 2011

A type of tribometer for experimental study of tribological performance of journal bearings under micro-load was developed, which utilizes the method of load counterpoise to obtain mechanics equilibrium state of the test rig so as to apply load from zero. A laser device and a PSD sensor were used to measure the displacement and friction force with high precision without contact. The friction coefficient is obtained from the frictional angle of the cantilever and displacement of PSD sensor. Two methods were used for the measurement of friction coefficient, friction angle and frictional torque equilibrium. The former measures the angle resulting from friction, and the latter utilizes the exterior torque to poise the rig mechanics state under the rotating condition. The zero location on PSD is at the tail end of test process. Through reaching one side weight limitation with pulley at the static state, calibration of load was completed. The tribometer can measure friction, stick-slip of journal bearings under micro-load. Furthermore, measurements of wider range of load and /or friction coefficient were achieved by setting the structure parameters of the tribometer. With data sampling and processing capability, bearing bulk temperature and friction coefficient can be obtained continuously with adjustable load or/and speed.
Wireless Sensor Networks for Search and Rescue Operations
Authors: Ab. Aziz Nor Azlina , Ab. Aziz Kamarulzaman
Published: March 2011

Global climate change is increasing the occurrence of extreme climate phenomenon with increasing severity, both in terms of human casualty as well as economic losses. Authorities need to be better equipped to face these global truths. This paper reviewed a technological solution for search and rescue operations using wireless sensor networks (WSN). WSN is able to provide more efficient search and rescue operations and lessening the risk faced by rescuers. In this paper the design issues and existing WSN for search and rescue projects are reviewed.
The Impact of Slack on the Innovation of Material Firms
Authors: Zhong He Ping
Published: March 2011

Although organizational slack research posits various relationships between a firm’s slack resources and innovation, findings to date have been ambiguous. To provide insight into this relationship, this paper studies the impact of slack resources on the innovation performance of material firms by using empirical analysis based on the data get from 54 firms in Henan Province by questionnaire. The result shows that the relationship between slack resources and innovation in material firms is the inverted U-shaped. Overall, results highlight the importance of additional research into intervening factors impacting the slack–innovation relationship.
Research on Stretching Order of Tendons in PC Curved Box Girder Bridge
Authors: Yang Ze Ying , Zhao Yu , Liu Zhi Sheng
Published: March 2011

This paper is based on an existed bridge---ramp bridge A of Mu-Shi interlinked flyover on Zao-Mu Freeway. The model of curved Box Girder Bridge was built using finite element method to simulate the stretching of prestressed tendons. To start with, several different alternative stretching orders were proposed, and afterwards, mechanical reflection of bridge under different stretching orders was calculated and evaluated respectively by commonly used finite element analysis software Midas. Additionally, evaluation principle was to avoid the appearance of tension in the concrete and to minimize stress fluctuation during stretching. To sum up, optimal stretching sequence was put forward after comparison of the calculation results based on the proposed evaluation principle. Moreover, the optimum sequence referred in this paper and the research approach can provide some valuable referential information about the stretching of prestressed tendons of bridges in the same style.
Study on the Method for Fault Sample Selection Based on Fuzzy Clustering
Authors: Wang Hong Xia , Liu Shuang Shuang , Ye Xiao Hui
Published: March 2011

A new method of fault sample selection is presented. First, the mapping relationship is established between the system components and system functions attributes according to the similarity of the system components and system functions attributes, the components are clustered to the class by fuzzy clustering method; then the fault sample is selected in the class according to relation of the faults propagation, the selected fault sample is validated by using the function adequacy and test adequacy. Finally From experimental results, the conclusion can be drown that the cost of this method is lower and the fault detection ratio is high. Compare with the other method the new method has certain advantages.
The Excellent Traits of a Class of Orthogonal Quarternary Wavelet Wraps with Short Support
Authors: Wang Guo Xin , Hua De Lin
Published: March 2011

The frame theory has been one of powerful tools for researching into wavelets. In this article, the notion of orthogonal nonseparable quarternary wavelet wraps, which is the generalizati- -on of orthogonal univariate wavelet wraps, is presented. A novel approach for constructing them is presented by iteration method and functional analysis method. A liable approach for constructing two-directional orthogonal wavelet wraps is developed. The orthogonality property of quarternary wavelet wraps is discussed. Three orthogonality formulas concerning these wavelet wraps are estabished. A constructive method for affine frames of L2(R4) is proposed. The sufficient condition for the existence of a class of affine pseudoframes with filter banks is obtained by virtue of a generalized multiresolution analysis. The pyramid decomposition scheme is established based on such a generalized multiresolution structure.
K-Connected Target Coverage Problem Based on Cliffford Algebra in Wireless Sensor Networks
Authors: Cao Wen Ming , Li Xiong Feng , Wang Mao Wei
Published: March 2011

An important issue in deploying a WSN is to provide target coverage with high energy efficiency and fault-tolerance. Sensor nodes in a wireless sensor network are resource-constrained, especially in energy supply, and prone to failure. In this paper, we study the problem of constructing energy efficient target coverage based on Cliffford Algebra . More specifically, we propose solutions to forming k-connected coverage of targets with the minimal number of active nodes based on Cliffford Algebra. We propose two heuristic algorithms to solve the problem. We have carried out extensive simulations to study the performance of the proposed algorithms. The evaluation results have demonstrated their desirable efficiency.
An Interval-Index-Oriented Intelligent Optimization Method and its Industrial Application
Authors: Cai Ming Shan , Kong Ling Shuang
Published: March 2011

Based on the strong coupling and interval requirement of multiple quality indices, the interval-index-oriented optimization method is proposed to effectively realize the optimal control of alumina blending process. Firstly, the lexicographic interval goal programming model is built to describe the process requirements for quality indices. Then, based on the characteristics of the programming model, a kind of classificatory knowledge base is constructed by using the empirical knowledge accumulated in long-term production and the expert reasoning strategy is proposed to realize the optimal control of quality indexes with interval constraints. The results of industrial application shows that the proposed method can realize the optimal control of quality indices. It provides a good optimization mode for other blending processes of nonferrous metal production.
Strong Tracking Filter Based on Extended Kalman Filter for Data Processing of Underwater Vehicle
Authors: Li Ye , Lu Zhen , Pang Yong Jie
Published: March 2011

A strong tracking filter based on suboptimal fading extended Kalman filter was proposed to ensure the perception for the motion state of underwater vehicles accurate in the paper. For the uncertainty of nonlinear system model, the strong tracking filter theory was introduced, orthogonality principle was put forward. Then suboptimal fading factor was pulled in, and extended Kalman filter for nonlinear system was established. The strong tracking filter was applied to data processing of underwater vehicle, and results indicate that it can effectively improve the accuracy and robustness of underwater navigation information.
Research on Complex Mechanism of Oligarchy Pricing Based on Price Repeated Game Model
Authors: Sun Zhi Hui , Ma Jun Hai
Published: March 2011

Based on domestic and international study, this paper proposes an innovative Bertrand model and discusses its complex dynamics characteristics. Results show that the best choice for oligopoly is to reduce price adjustment speed and the satisfactory game result is to maintain equilibrium price. According to oligopolies’ game strategy, the paper uses parameters adjustment control method to make the chaotic state of price stable at the equilibrium state.
Analysis of Power System’s Critical Damping
Authors: Bu Jing , Jiang Ning Qiang
Published: March 2011

In this paper, the analytical formulations among the damping factor and the other parameters are studied by Melnikov method for the classic second-order model of power system. The proximity of Melnikov method is analyzed by comparison between the obtained critical damping factor with the result by time-domain simulation method. It points out that this method exist great error in the range of engineering application. To solve this problem, an improved method is proposed to calculate the critical damping factor based on RBFNN. Finally, simulations show that it can effectively improve the calculation accuracy.
Study of SCR Denitration Efficiency under Different Boiler Load Conditions
Authors: Hu Man Yin , Jin Yi Jing , Wang Xiu Hong , Sun Yu
Published: March 2011

With the use of energy, the pollution is more and more serious. As the largest pollution family, coal-fired power plant must control the pollution strictly. It established model of a coal-fired power plant SCR system, and simulated the denitration under different boiler load conditions, to get the denitration efficiencies and the regular of the denitration efficiency under different boiler load conditions. It can provide recommendations for practicality run in coal-fired power plant SCR system.
A Knowledge Reduction Method Based on Concept Lattice
Authors: Wang Xu Yang
Published: March 2011

Formal concept analysis and rough set theory provide two different methods for data analysis and knowledge processing. Knowledge reduct in this paper combines the two models. For an initial data sets described by formal context, look for absolute necessary attribute sets by applying rough set theory. The sets can image the concepts and hiberarchy structure completely. Then calculate the value cores of attributes values for all objects and delete redundant attributes. At last, delete repeated instances and get the minimum formal context. Construct the concept lattice of the minimum formal context can diminish the size of concept lattice of the initial table at a certain extent.
Research on IGMP and its Implementation for Switch Management
Authors: Lu Sheng
Published: March 2011

Based on a kind of new intelligent controller for industrial Ethernet: ICIE (Intelligent Controller for Industrial Ethernet), this paper proposed a new mechanism to minimize the congestion which is based on the taking an adaptive decision during transferring multicast messages by IGMP snooping. It has a further discussion on services design on the switch. And it analyzes on the implementation for switch management for ICIE. It is through the external devices solicitation of join messages that allow the IGMP Snooping component to correctly decipher on which ports the downstream listeners are connected.
Online Fuzzy Intelligent Control Based on Resultant Cutting Force in the End Milling
Authors: Li Mao Yue , Fu Hong Ya , Han Zhen Yu
Published: March 2011

To improve production quality and reduce machining time, machining parameters need to be monitored and adjusted automatically in milling. An integrated controller which is modular, configurable and based on OMAC, is established. The hardware platform, resultant cutting force constraint and its fuzzy control rules have been introduced in detail. In the fuzzy controller designed, two inputs and one output are used with five fuzzy sets for the controller, and the output rate of feed-rate can be changed from 50% to 200%. This controller has the abilities of reducing fluctuation range of cutting force, adjusting feed-rate intelligently, which is a part of CNC system. The experiment results show it can realize the real time status monitoring with this system, reduce the cutting force fluctuation, and adjust the feed-rate intelligently during machining.
Applications of 3S in Yellow River’s Flood Control
Authors: Hu Jie , Han Ling , Liu Hao Jie , Gao Qing Fang
Published: March 2011

This article introduces applications of 3S, Geographical Information System (GIS), Global Position System (GPS) and Remote Sensing (RS), in river’s flood control. Take revising the Lower Yellow River’s 1:50 000 riverway topographic maps as an example, the author elaborates how to use 3S to update the existing maps. It has shown that update of maps based on 3S is short in work period, cheap in cost and simple in process. Moreover, the revised topographic maps are with high precision and they can meet the urgent data requirements of Yellow River’s flood control. It can also provide a strong data support for the construction of Digital Yellow River.
Analysis of Collected Heat by Solar Collectors Fixed on the Outside Wall of Balcony
Authors: Zhang Li Xi , Gao Shi Yuan , He Qing Yuan , Zhang He Fei
Published: March 2011

It is studied the collected heat by collectors fixed on the outside wall of balconies when the shape and direction of balconies, and inclination angle of collectors are changed. Total heat collected by three walls of the rectangle balcony toward southeast or southwest is more than the one collected under other conditions. Total heat collected by rectangle balcony toward south would be increased when the inclination angles β of collectors are reduced. As β=70°, and the collectors were installed only on the south wall, to make water temperature above 60 °C in 150 L tank, extra energy needed is equivalent to 46.5 kg/a standard coal; if collectors were installed outside three walls of balcony, extra energy is not needed.
Study on the Forecasting Method of Grain Potential Productivity of Heilongjiang Province
Authors: Zhang Hong
Published: March 2011

Study on grain potential productivity is important for a country to crop production planing,population controling,natural resources utilization and environmental protection.This article has defined the food production potential connotation, advanced the food production potential adva -ce in technology driving influence prediction theory. Has established the overall modelling method, series forecast techniques and so on partition modelling method tendency. Proposed the prediction theory and establishes the system forecast technique may take our country food production potential and even the estimation rationale and the method foundation, and may apply other similar system's predict that its application prospect is very widespread.
Interferometer Environmental Error Compensation Based on Refractive Index’s Spatio-Temporal Coupling Model
Authors: Gao Zhen Yu , Zhang Ming , Hu Jin Chun , Zhu Yu , Duan Guang Hong
Published: March 2011

By analyzing the length measurement principle of interferometer, the key of environmental error compensation of interferometer is modeling the refractive index distribution along the measurement optical path. The spatio-temporal coupling models of temperature, pressure and humidity were established through the collected data by sensors, using the block pulse operator method. Then the model of refractive index over time along the optical path was obtained by Edlén’s formulation, and the environmental error compensation was achieved. The simulation results of lithography mask stage’s movement environmental flow and measurement showed that this method can compensate interferometer environmental error well, and the following residual error was reduced to less than 1nmso that the resolution level was achieved.
Existence and Uniqueness for Stochastic Predator-Prey System of Two Species with Age-Structured
Authors: Li Fei Fei , Zhang Qi Min
Published: March 2011

In this paper we introduce a stochastic age-dependent predator-prey system. Existence and uniqueness of strong solution for a stochastic population system of two species with age-dependent are proved. The analysis uses Barkholder-Davis-Gundy’s inequality,ItÔ's formula and some special inequalities to achieve our purpose.
A Platform Based on Network Environment for the Trade Information
Authors: Zhu Lin , Li Jia Shan
Published: March 2011

This paper presents an innovative application of a management platform based on network environment for the trade information. The platform is an application on the web-based designed to service human resource in cultural trade, and economic entities, &. The system is based on modern pedagogy, and theory and method of combining advanced internet technology by priding students’ information on seeking job, in the same time, it will provide the information of authoritative data for the real economic unit to access to meet the needs of people resume through the online platform.
Relationship between Riverway's Fractal Dimension and River Flood of the Lower Yellow River
Authors: Hu Jie , Han Ling , Gao Qing Fang , Liu Peng Jun
Published: March 2011

Fractal theory was used to study the rules of Yellow River’s food happening. The author put forward a method, grid method, to calculate the riverway’s fractal dimension. After comparing the fractal dimensions and flood peak discharges of the Lower Yellow River parts, some helpful conclusions have been achieved. At a certain scale range, riverway of the Lower Yellow River shows some fractal characteristics, that is self-similarity. The fractal dimension of the Lower Yellow River changes with the flood peak discharge. Usually, the bigger the fractal dimension, the more curving the river way, the bigger the flood peak discharge, the bigger the possibility that flood happens. As a result, the fractal dimension can be regarded as a quantitative index to predict flood.
Low-Carbon Selection Decision for Logistics Enterprises Based on Evolutionary Game under the Supervision of Government
Authors: Zhou Ye , He Hui , Wang Yan Feng
Published: March 2011

The emission of greenhouse gases leading to global climate warming has caused widespread concern on the part of governments worldwide. As one of the main sources of carbon emissions, modern logistics occupies a unique position for energy saving. But as economic entities, logistics enterprises have no real incentive to implement low-carbon logistics operations, which needs government to stimulate logistics enterprises to implement low-carbon strategy through regulations. Constructed an Evolutionary Game Model for logistics enterprises to implement low-carbon selection decision under the supervision of the government, analyzed the effcts of different regulative parameters on the implementation of low-carbon strategy in logistics business. The results show that government's regulation and strategies play a crucial role in carrying out the low-carbon strategy. Finally, according to different evolution conditions and conclusions, it proposes appropriate supervision strategies for government to promote logistics enterprises to put the low-carbon strategy into effect.
Application of BP Neural Net Work and PCA in Prediction of Plant Diseases Control
Authors: Shi Ming Wang
Published: March 2011

Wheat sharp eyespot is an important plant disease of wheat roots. To improve the accuracy of prediction of this disease and to control the disease effectively, This paper presents a new prediction model by principal components analysis (PCA) and back propagation artificial neural network (BP-ANN) methods. The application of BP and PCA in forecasting plant diseases was also summarized. Application of BP Neural Network and PCA in Prediction for wheat Diseases. To build diagnosing wheat diseases based on BP neural network, and PCA was discussed. The precision of the simulation is the high, fault tolerant capacity is better, reliability, and robustness are better. The result of the forecast model is satisfied. So the model of predicting wheat disease based on adaptive neural networks has the important reference value. The test results showed to build the early warning model is effective and likely which, will provide a model to set up the effective early warning platform. Results showed that BP neural network and PCA had a strong application value in the diagnosis of plant diseases.
Application for Fiber Bragg Grating Sensor in Internal Force Testing of Lining Structure
Authors: Yang Jian Guo , Ma Wei
Published: March 2011

In order to know about the change of concrete stress and internal forces during the construction period of one highway tunnel, to evaluate the safety of lining structure, to take precautions against early diseases and to avoid loss in result of structural instability, linear arrays of fiber Bragg grating sensor in series were used for continuous monitoring typical lining cross section based on wavelength division multiplex. A mass of initial data was acquired. Furthermore, internal forces and early concrete stress of lining were analyzed according to time stress curve and internal force diagram. It has been found that fiber Bragg grating is highly adaptable to tunnel environment and the test method is of high accuracy. Therefore, the method discussed in this paper can be used for field test of tunnel structure extensively.
Research on QoS Multipath Routing on ACO Algorithm
Authors: Lin Na , Shao Zhi Xue , Chen Xiang Yu
Published: March 2011

Unlike traditional routing schemes that route all traffic along a single path, multipath routing strategies split the traffic among several paths in order to ease congestion. It has been widely recognized that multipath routing can be fundamentally more efficient than the traditional approach of routing along single paths. According to the characteristics of ant colony algorithm and the ideal of multipath routing. This paper proposes a QoS multipath routing on ACO Algorithm. ACO was improved in three aspects. As a ant selects the next hop, the utilization ratio of router's buffer queue is added into the criterion of selection, introducing the utilization ratio of link to update the global pheromone, selecting multiple paths to transfer data. Simulation experiments show the algorithm can achieve network loading balance, reduce the likelihood of congestion, and impove the utilization of network resources.
Networked Management of Non-Book Materials
Authors: Wang Lan Jing
Published: March 2011

With the development of information carriers and information recording means, non-book materials have experienced considerable changes in type and number. Moreover non-book materials play an increasingly important role in information resources construction by virtue of increasing user demand for non-book materials.At present non-book materials in the library are short of effective management and unable to meet user demand, which reduces user satisfaction and damages the image of the library. The author holds the opinion that establishing networked management of non-book materials is crucial. In order to solve this problem, the author mainly expounds 5 indispensible aspects of networked management in non-book materials: classification unification and descriptive standardization; transformation of information; networked management; establishing regional joint service system; paying attention to the copyright problem.
Discussion on the Lightning Protection for Video Surveillance System
Authors: Du Guang Chao
Published: March 2011

Due to the low level of overvoltage withstand and over-current withstand, the overvoltage caused by direct lightning stroke, lightning-wave intrusion, lightning induction etc. can pose an enormous threat to video surveillance system device, and the lightning protection problems appear very important. Adopt effective lightning protection measures in the light of lightning harm features of the constituent parts of video surveillance system like front-end device, transmission lines, surveillance center, etc. Practice has proved that the proposed lightning protection measures can play an important role for improving the security of video surveillance system.
Computer Graphic Control on the Battery Monitoring System
Authors: Yarn Kao Feng , Wu King Kung , Lin Wen Bin
Published: March 2011

In this study, the MITSUBISHI PLC (FX2n-32MR) is used to achieve the lead-acid battery monitoring system. The battery is by way of rater and FX-2AD used in charging state. The analog and digital data are transmitted to PLC to get the real-time monitoring and control. During charging, time and voltage keep constant to reach charging optimization condition. In addition, AD590 is used as reference measurement and battery protection in temperature control.
The Research on Media Audience Market Segmentation Based on Cluster Analysis
Authors: Lu Wei
Published: March 2011

This paper is based on the theories of consumer market segmentation. With the use of Cluster Analysis and regarding the characters of media market, the article also analyzes the Index System of Audience Structure. With the help of SPSS statistical analysis software, we will set a new analysis system about media audience structure, which has multiple indicators. In addition, there is one specific case about classification and structure of the television audience.
Controllability of Multi-Rate Networked Control Systems with Short Time Delay
Authors: Zhu Qi Xin
Published: March 2011

Feedback control systems wherein the control loops are closed through a real-time network are called networked control systems. Multi-rate networked control systems mean the sampling rates of notes in networked control systems are not the same. The controllability of multi-rate networked control systems are investigated in this paper for the first time. Based on the mathematic model of multi-rate networked control systems with short time delay, some sufficient or necessary conditions for controllability of multi-rate networked control systems are got using stochastic systems approach.
Research on Evolution of Chinese Telecom Industry Ecosystem Based on Logistic Model
Authors: Chen Fei , Yang Tian Jian , Wang Rui Yu
Published: March 2011

In order to study the evolution strategy adopted by the telecom industry in a new competitive environment, this paper introduces an ecological theory and method. The authors build a model for the telecom industry’s ecosystem and analyze the dynamic evolution process of the telecom industry through a Logistic model. The results show, when the telecom industry’s ecosystem comes to the mature phase, the main body of it need to change the evolution strategy from quickly occupying market with quantity to expanding market capacity by improving business innovation and constantly developing new value-added services. Different from traditional qualitative analysis, the dynamic and quantitative method adopted by this study gives a deep insight for the evolution mechanism of the telecom industry’s system, and guides the telecom market towards rational development.
Ammeter Interface Device and Monitoring System Based on Wireless Sensor Networks
Authors: Tan Min Sheng , Tian Hai Tao , Chen Qiong
Published: March 2011

A kind of wireless monitoring interface device based on wireless sensor networks for ammeters was proposed. Ammeters connected by UART or pulse interface to get ammeters’ real-time data. Then, an ammeter monitoring system based on wireless sensor networks (AMSBW) was designed. The system consist building-WSN and community wireless monitoring center. And user’s ammeters, ammeter wireless monitoring interface devices and building-sink nodes were included in the building-WSN; the center sink node and monitoring host were contained in community monitoring center. The functions of real-time monitoring, remote control and preventing electricity-stolen were designed in the AMSBW which had simple installation and configuration. Then a software system to test the AMSBW was exploited. At last, system’s tests results show that it could effectively achieve the goal of real-time monitoring and control ammeter.
Haptic Feedback Interaction Design and Implementation in Virtual Spinal Fixation Surgery System
Authors: Song Hua Zhu , Cheng Cong , Zhao Bin , Liu Bo
Published: March 2011

This paper proposed the solution of haptic feedback interaction, which can be used for 3D interaction in Virtual Spinal Fixation Surgery System. We frist introduced the traditional Proxy-based Volume Haptics solution, and then proposed the Haptic feedback primitive based on it. There are four Haptic feedback primitive: point, line, plane and direct force. The haptic feedback system developing model is composed by Haptic Rendering and Graphics Rendering. The paper designed interface and classes based on this model, and then implemented the haptic feedback system at last. With this system, we can feel the load carring condition, speed up the virtual operation and provide data analysis more accurately.
Composite Event Processing for Data Streams and Domain Knowledge
Authors: Liu Jun Qiang , Guan Xiao Ling
Published: March 2011

In recent years the processing of composite event queries over data streams has attracted a lot of research attention. Traditional database techniques were not designed for stream processing system. Furthermore, example continuous queries are often formulated in declarative query language without specifying the semantics. To overcome these deficiencies, this article presents the design, implementation, and evaluation of a system that executes data streams with semantic information. Then, a set of optimization techniques are proposed for handling query. So, our approach not only makes it possible to express queries with a sound semantics, but also provides a solid foundation for query optimization. Experiment results show that our approach is effective and efficient for data streams and domain knowledge.
An Exploratory Study on Road Traffic Safety Based on Fault-Tolerant Concept
Authors: Hu Li Wei , Pei Yu Long , Li Xue
Published: March 2011

Base on researching the source and development of fault tolerance theory, this paper discusses the working mechanism of fault tolerance, and illustrates the workflow and dependability of fault tolerance. So there is a widespread belief that this is feasible that fault tolerance theory is used in the traffic safety study. Through summarizing the progress of the fault-tolerant study in road traffic field at home and abroad, the paper gets some enlightenment from these literatures, finally gives the prospect of fault-tolerant theory which is used in the road traffic safety research.
Algorithms for Routing Protocol in Wireless Sensor Networks
Authors: Liao Ying , Hao Wei Xu , Li Wei Qun
Published: March 2011

Wireless sensor networks (WSNs) detect and monitor the outside physical state by the sensor nodes organizing automatically. Routing protocol is one of most important parts research contents of WSNs. This paper analyses and compares routing protocols of wireless sensor networks with other networks, and summarizes characteristics and the appropriate application by studying recent routing protocols for sensor networks. Finally, the important features and the future trends of routing protocols possess are putted forward.
The Application of Data Mining in Constructivist Learning
Authors: Li Li , Xu Fang Liang
Published: March 2011

The constructivist learning based on data mining technology is a senior learning process, it realized the discovery to the unknown knowledge, it reflected knowledge construction goal that constructivism pursue. In this paper, we first briefly introduced the data mining technology and constructivist learning, analyzed the necessity of the application of data mining technology on constructivist learning, and then put forward the viewpoint of the combination between them, finally, we discussed how to implement the data mining in constructivist learning.
Experimental Study of Melt Electrospinning in Parallel Electrical Field
Authors: Hao Ming Feng , Liu Yong , He Xue Tao , Xie Peng Cheng , Yang Wei Min
Published: March 2011

In this paper, self-designed electrospinning equipment was used to make a series of electrospinning experiments with materials of polypropylene. The influences of the receiver area, the upper plate area, and the overlapping area between the receiver and the upper plate, on the melt spinning electric field, the spinning efficiency, and the fiber diameter, were investigated respectively. The results showed that when the other parameters were kept unchanged, with the increase of the receiver’s diameter, the electric field strength and spinning efficiency increased, and the fiber diameter increased at first and then decreased; the bigger the overlapping area between the receiver and the upper plate, the more stable the vertical spinning path.
Study on the Surface Treatment of Special Screw for Light Guiding Plate’s Precision Injection Molding
Authors: Gou Gang , Xie Peng Cheng , Wen Zhen Xing , Ding Yu Mei , Yang Wei Min
Published: March 2011

Defects such as black spots and yellow surfaces appeared in the process of injection molding light guiding plate as a result of the failure surfaces of the screw and screw tip. To choose and optimize the solutions of different surface treatments of the special screw for light guiding plate, the stripping performance testing platform was established. The experimental results showed that TiN and TiAlN or similar coatings by physical vapor deposition could significantly reduce the adhesion force between polycarbonate (PC) and different coatings. Through surface topography analysis of diversified coatings with SEM and AFM, TiAlN coatings represented the excellent surface quality of its smoothness, continuum, and low surface wave. To enhance the bonding force between the molding screw and coatings, TiAlN/Cr and TiAlN/Ti multi-films was developed which owned much more firm bonding force than TiAlN and good surface quality to be suitable for the special screw for manufacturing light guiding plate.
Study on the Synthesis and Properties of EP/PU Composite
Authors: Wang Xiao Qian , Huang Zhi Xiong , Zheng Juan Li , Mei Qi Lin
Published: March 2011

Isocyanate-terminated polyurethane was synthesized from polyethylene glycol and toluene disocyantes, which was used to modify the epoxy resin. D-230 was chosen as hardener to produce the PU/EP composite. The structure of composite was characterized by FTIR spectrum. Mechanical properties of the epoxy resin with different PU content were studied. Additionally, damping properties of the PU/EP composite were investigated using DMA, and the results showed that the damping properties of EP evidently improved by blending with PU and with the testing frequency increased, the spectra of tanδ-T shifted to higher temperature.
Simulation of Non-Isothermal Crystallization under Varying Cooling Rates for Polymer Melts
Authors: Qiu Bi Wei , Chen Jing Bo , Zhang Bin , Shen Chang Yu
Published: March 2011

Traditional studies of crystallization kinetics are often limited to idealized conditions where the temperatures or the cooling rates are constant. In real manufacturing processes, however, the external conditions change continuously, which make the kinetics of crystallization dependent on instantaneous conditions, especially on changing cooling rate. To obtain the crystallization information in manufacturing processes, lots of mathematical models for the non-isothermal crystallization kinetics are raised. But most of them concentrate on constant cooling rates melts crystallization behavior and pay little attention to the condition of varying cooling rates, which is more close to actual processing conditions. Based on the thermodynamics theory of crystallization, I.J. RAO and K.R. RAJAGOPAL derived a general specific model for quiescent crystallization (it is simplified as RAO model below). In order to verify the RAO model’s simulation effect on changing cooling rates crystallization, the constant cooling rates and varying cooling rates melts crystallization of isotactic polypropylene, high density polyethylene and nylon 6 were all investigated using the DSC technique. The results showed that the model predictions and experimental results were in good agreement.
Research on the Curing Behaviour and Morphology of an Epoxy/OMMT Nanocomposite System
Authors: Lin Guang Yi , Qu Dian Wei , Wang Chuan Sheng
Published: March 2011

The curing behaviour of an epoxy/OMMT nanocomposites system which was composed of a bifunctional epoxy resin with an anhydride curing agent and OMMT was investigated. Differential scanning calorimetry (DSC) was used to investigate the curing behaviour of the nanocomposites system. As for the nanocomposites system containing different amounts of OMMT, the values of activation energy, reaction order, theoretic gelling temperature and theoretic curing temperature were evaluated by kinetic equations. And the effect of OMMT on the curing reaction and the curing reaction mechanism of the system were discussed. The results showed that the curing process is at 100°C for 1hr, 170°C for 2hr when the OMMT content is 3%. XRD was used to observe the interlayer spacing of the OMMT and SEM was used to survey the morphology of nanocomposites system.
Study on the Dense Phase Pneumatic Conveying Property of Carbon Black
Authors: Li Zhi Hua , Liu Jian Feng , Jiao Lei , Guo Lei
Published: March 2011

The dense phase pneumatic conveying system of carbon black and the experimental process are introduced in the paper. According to the test data, the factors that influence the carbon black conveying performance are analysed. This paper points out that the higher of air flow rate will increase the conveying capacity of carbon black, but will approach to a critical value. The open pressure of the blow pot has a optimal extent, in which the carbon black conveying time will be the shortest. This paper also points out that the longer the conveying distance, the higher the carbon black fragmentation rate.
Influence Analysis of Sampling Time for Synthesis of Carbon Nanotubes in the V-Type Pyrolysis Flame
Authors: Liu Yuan Chao , Sun Bao Min , Ding Zhao Yong
Published: March 2011

Synthesis of carbon nanotubes from V-type pyrolysis flame is a kind of novel method. It needs simple laboratory equipments and normal atmosphere pressure. The V-type pyrolysis flame experimental system is introduced. Carbon source is the carbon monoxide and heat source is from acetylene/air premixed flame. Pentacarbonyl iron, served as catalyst, is transported by spray- pyrolysis method into the flame. The carbon nanotubes were characterized by scanning electron microscope and transmission electron microscope. This study aims to find the formation rule of carbon nanotubes from the V-type pyrolysis flame in different sampling times. The carbon nanotubes with less impurity and high yield were captured successfully in the V-type pyrolysis flame. The diameter of carbon nanotubes was approximate between 10nm and 20nm, and its length was dozens of microns. When the sampling time was below 3 minutes, the growth of carbon nanotubes came into the preparation growth period. The length of the carbon nanotubes increased gradually and the diameter had no obvious change with the extension of sampling time. When the sampling time was continued to the 5th minute, the growth of carbon nanotubes came into the exuberant growth period. The carbon nanotubes growth was finished within 5minutes. Longer sampling time was meaningless after the carbon nanotubes formation.
Process Analysis and Numerical Simulation of UHMW-PE Pipe Gas-Assisted Precision Molding
Authors: Tong Feng Hua , Qin Jian Hua
Published: March 2011

The method of molding in barrel is a new technology of extruding pure UHMW-PE pipes continuously on single screw extruder. Its significant advantage is that the pure UHMW-PE tube is extruded continuously and efficiently without any additives. In order to get UHMW-PE pipe with smooth surface, high dimensional accuracy and excellent performance, the tube should be molded precisely by the gas-assisted device. This paper will analyze the principle of UHMW-PE pipe gas-assisted precision molding and simulate the process. The analytical results such as temperature, time and internal stress distribution provide a theoretical basis for the design of the gas-assisted precision molding device.