bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Detection of Parallel Arc Faults Based on the Characteristic Analysis in Time Domain
Authors: Wu Yuan , Song Zhong Xiao
Published: August 2013

Arc fault is one of main cause of fires which bring great loss and damage every year. Researchers show that the conventional circuit breakers probably fail to interrupt the circuit when an arc fault occurs. So, it is very important and necessary to find a new way to detect the arc fault. This thesis focuses on discussing the special characters of parallel arc faults, which are the main cause of fires. In this paper, not only the data of parallel faults, but also the normal working data of different apparatus are obtained. Two significant characters will be described and they will be the key criterions to detect the appearance of parallel arc faults. At last, we test the correctness of this method and get good results.
Fault Diagnosis of Rolling Bearing Based on the PSO-SVM of the Mixed-Feature
Authors: Ma Jun , Wu Jian De , Fan Yu Gang , Wang Xiao Dong , Shao Zong Kai
Published: August 2013

The rolling bearing is one of the most important and widely used parts in the rotating machinery. It is necessary to establish a reliable condition monitoring program which can avoid serious fault in the runtime and diagnose failure timely and accurately when it happens. This paper puts forward to a fault diagnosis method of rolling bearing based on the PSO-SVM of the mixed-feature. Firstly, we extract features in time domain, frequency domain, and order quenfrency domain. Secondly, select both Support Vector Machine (SVM) parameters by Particle Swarm Optimization (PSO) algorithm and kernel function of SVM classification model. Finally, classification model of SVM is designed by using the extracted salient features, kernel function and optimal parameter of PSO. The result verifies the effectiveness of the proposed method.
Color Composite of Digital Radiography Image and Region Growing Defect Detection
Authors: Tian Kai , Shi Jia Rong
Published: August 2013

DR image in industrial castings is usually a gray scale image and it has difficulty in simultaneously showing the defects within different thickness parts. To address this issue, the floating point type data obtained by the scanning of DR system is firstly converted into three gray scale images by the more gray stretch technique, where different gray scale images contain different thickness defects of the castings. Secondly, those three gray images are synthesized into one color image. The synthesized image contains lots of details of measured castings and its aim is to reduce the loss of image detail caused by the converting procedure. Then region growing model is exploited to segment the defects of images. Finally, experimental results show that the color synthesis method can better segment the casting defects of the different wall thickness.
A Testing Method for the Luminance Difference of Stereoscopic Television
Authors: Wu Dong Yan , Cao Jian Dong , Jin Yi
Published: August 2013

The luminance difference is one of the important factors of stereoscopic television. In this paper, according to the characteristics of stereoscopic television glasses, we use white window signal and black field signal to measure luminance difference of 3D TV. We adopt the left and right eye channel individually tested brightness. We chose the center point of stereoscopic television as measuring point. And then, we select a few of stereoscopic television as testing model. The proposed method may be helpful for the quality evaluation of stereoscopic television.
A Long-Term Frequency Dynamic Simulation Method of Power System with the Wind Farm Based on Quasi-Steady State Simulation
Authors: Sun Ying Yun , Jin Zhao Yu , Pu Tian Jiao , Yu Ting , Wang Wei , Ashan Ashan
Published: August 2013

With the continuous improvement of wind power penetration, the impact of the random fluctuation characteristics of wind power on the frequency control of the power system is growing. Currently, researchers began to study the methods of wind farms participation in frequency control to reduce the frequency adjustment pressure of other power plants and increase the wind power penetration. However, the existing simulation software for the short and long term frequency control of the power system is not so good. So in order to analyze the impact of load fluctuations or wind farm power fluctuations on system frequency control, this paper propose a frequency fluctuation simulation method based on the quasi-steady-state method.
External Network Equivalent of Wind Power Simulation for Fu Jian
Authors: Li Chuan Dong , Xu Jin Jin , He Hou Yu
Published: August 2013

In recent years, there was a rapid development of wind power. The impact of large amount of wind power integration into power system on the voltage and power quality could not be ignored. The characteristic of internal dynamics of wind turbine was complicated, as a result, it could not be simulated by electromechanical transient simulation soft (BPA). It was necessary for transformation from BPA to PSCAD which was electromagnetic transient simulation program. However, the modeling work for the external power grid was enormous and meaningless. In this paper, external network was equivalent based on the BPA data of actual grid combined with PSCAD. This method not only could simulate the influence both simple and effective, but also could establish the detailed model of the regional power grid and wind power. At the same time it has been effectively used in the analysis of wind power integration into actual wind projects of Fujian power grid which achieved very good results.
Influence of Curve Geometric Parameters on the Curve Negotiation Performance of Hot-Metal-Car
Authors: Feng Guo Sheng , Liu Huai Yin , Jia Su Mei , Wang Chao
Published: August 2013

To meet the need of an open type of 140t hot-metal-car for improving design, the analysis model of the main parts was built up by using Pro/E software, and the moment of inertia of each component was calculated.Then the Pro/E model was imported into ADAMS/Rail for assembling to finish a hot-metal-car dynamic model. The possibility of derailment and the wheel/rail abrading were simulated and analyzed on the hot-metal-car. The result of analysis provides theoretical foundation for improvement design.
Research on SVPWM Inverter Transient Output Characteristic
Authors: Lin Cheng Wu , Wang Xue Jiao , Zheng Hao
Published: August 2013

The basic control theory of SVPWM is analyzed, and then the algorithm of SVPWM is established. Experimental device of SVPWM inverter based on DSP is established and the transient output characteristic of SVPWM inverter is researched and applied to achieve the rotor excitation control of double-fed motor. Experiment results show that the control algorithm of SVPWM and the control method of transient parameters output of SVPWM inverter proposed are feasible and have certain reference value to the research and application of SVPWM technology.
Vision-Based Route Recognition of AGV on ARM Platform
Authors: Huang Xiao Hua , Wang Ke , Huang Ze Yi , Chen Chun Peng
Published: August 2013

The AGV based on visional route recognition need to deal with problems of random interference of environment and real-time of algorithm. In this paper, an embedded platform based on ARM Cortex-A8 hardware is established, on which an implementation of the optimized algorithm is tested. The first algorithm of route recognition is based on binary spilt and morphology operator, and the second one is based on edge detection operators and Hough transform. The result of the experiment indicates a high performance on anti-interference and real-time.
Design and Implementation of Wireless Medical Monitor Based on WIFI Technology
Authors: Lei Wen Li , Ren Xin Cheng , Cao Xin Liang , Zhang Xin
Published: August 2013

In view of the development of domestic demand for wireless medical technology market, the paper presents a WIFI-based wireless medical monitor which used to collect body temperature, pulse and other physical characteristic parameters of patient in every ward in the building. The entire monitoring system is composed of wireless medical monitors distributed in each ward and monitoring center computer. Wireless medical monitor is developed based on embedded core processor ARM9 and embedded Linux operating system platform, which uses WiFi wireless network to send patient physical characteristic parameters data to the monitoring center computer. Monitoring center computer can be used to view, store, forward recorded patient physical characteristic parameters data, and provides a basis for the patient's next medical programs.
Objective Recognition Algorithm of Remote Sensing Image Based on Wavelet Transform
Authors: Li Ben Tu , Yuan Zhi Chao
Published: August 2013

The traditional template matching algorithm which has a high time complexity, is susceptible to noise. This paper proposed a algorithm which based on the features of continuous orthogonal wavelet Daubechies, decomposed images to be identified to multiple layers using wavelet tranformation. In order to get matching position, we select matching template in low-frequency images. Then get matched position in higher layers after doing inverse transformation to low-frequency image. Finally, accurate position of matching template will get in original images. The algorithm not only can reduce the searching time when images are matched, but also can filter out a certain amount of noise, and so reduce the noise interference.
Gauss Background Modeling Method Based on Multi-Scale Feature
Authors: Li Zhong Hai , Yu Peng Bo , Zhang Qing Cheng
Published: August 2013

The existing background modelings are mostly color vision characteristics modeling based on single pixel, which are easily influenced by light shadow, weather and noise, and can easily cause foreground apertures and false alarm discrete noise. This paper presents the background modeling based on multiscale Gauss parameters against deficiencies. the experimental results shows that it can efficiently solve the problem of cavity and false alarm discrete noise.
A Straight Line Preserving Seam Carving Technique
Authors: Tsai Yih Jia , Lin Hwei Jen , Li Yue Sheng
Published: August 2013

In this study, we would like to improve the existing seam carving methods by using an more appropriate edge map and with the aid of Hough transform to select more appropriate seams for removal. This would allow seam carving to adapt to a variety of environments, providing desired results for users.
Detection and Tracking of Cooperative Target for Space Exploration Task Based on Visual Measurement
Authors: Wang Jing Jing , Huang Jian Yu , Qin Shi Yin
Published: August 2013

The detection and tracking of cooperative targets are crucial significance in the rendezvous and docking of space targets. In this paper, a high performance detection and tracking method is proposed based on the combination of adaptive threshold sub-pixel detective positioning with the nearest neighbor clustering analysis of feature points in visual images. In order to enhance the accuracy of detective positioning the bilinear interpolation is employed to achieve sub-pixel coordinates positioning. And then the improved particle filter is used to carry out the prediction and tracking of cooperative targets so as to overcome stochasctic disturbances from stray light and noises. A series of experiment results indicate that the proposed method is characterized with its well performances of detection accuracy and real-time tracking and its outstanding simpleness and practicability so as to play important role in the implementation of cooperative target detection and tracking by visual measurement in the RVD of space exploration.
Design on the Monitor System of IPTV Program Broadcast
Authors: Lan Zhen Ping , Wang Yu Ru , Li Ping , Lei Dong Ming
Published: August 2013

PTV is a kind of digital television service developed by telecommunication operation business, which provides multicast, VOD and time-shifted, as well as a variety of value-added applications. The broadcasting quality of the IPTV program will determine the popularization of this service. This article mainly analyzes the broadcasting mode, monitors the key parameters and standards of IPTV program. It layouts the IPTV program broadcasting monitoring system, and defines the monitoring function to specific equipment to guide the development implementation of the system.
A Class of Large Family of Binary Sequences with Low Correlation and Large Linear Span
Authors: Chen Jun , Chen Yun
Published: August 2013

In this paper, a new family of binary sequences of period is proposed, where and . The presented family takes 7-valued correlation values , , , , , and . For and , it is proved that the proposed sequence family has linear spans , where l = 2, 3, 4, 5, 6, 7, and the distribution of linear span of sequences in is determined.
MapReduce Implementation of Face Recognition Based on HOG Feature and NSMD
Authors: Li Shi Zhao , Huang Hao Feng , Xiao Nan Feng
Published: August 2013

There are some problems in the traditional face recognition: too sensitive to light, its classification is too simple, hard to apply to distributed system. For these problems, this paper does three work: used HOG feature in the face recognition, that improved it get more steady feature in different type of light; putting forward NSMD (Nearest Sample Max Distance), it try to find some partly best classifications to unite one strong classification, so the classification hyperplane can be more far from the sample boundary; finally the algorithms of this paper specially the one-to-one design mode are adapt to MapReduce, so its feasible to own the advantages of distributed system (expansively safety...). With the experiment analysis, the work gets their goals: HOG feature can be adapt to different lights, NSMD can get better rate of identification, the MapReduce algorithms can get fine speed-up ratio.
Research on the Smart Grid Dispatching System Based on Cloud Computing
Authors: Li Lian , Huang Zhi Xin
Published: August 2013

Dispatching being the core of the power operation and control, intelligent dispatching is the key point of the construction of unified and strong smart grid. During the construction of smart grid dispatching technical support system, many key points and difficulties must be addressed including massive data storage and processing, huge computational applications of security and stability assessment, unified management and flexible expansion of the system, flexible deployment and dispatching operations, integration of calculation and analysis capabilities. Based on the relevant characteristics of cloud computation, there latest technologies using cloud computation and the optimization of platform in constructing smart grid dispatching technical support system were discussed.
Database Design for Archives Management System
Authors: You Kai He , Li Hong Yan , Zhao Sheng
Published: August 2013

Archive management system based on modern information technology as the support, the archives information as management object, the archives work as the core and implement management information system, database design is the core work of the development of archives management system work, this article launches the research from four aspects according to the database design process. First, from the business requirements, functional requirements, performance requirements, such as security requirements for demand analysis; Second, according to the result of requirement analysis, conceptual design using E-R diagram; Third, converting E-R diagram logic structure supported by the database management system; Fourth, for the logic model to determine the storage structure and access method. In this paper, it based on the relational database design, a relational database with full-text database is the development direction of the future.
An Efficient Parallel Montgemery Cryptography for Multi-Core Processor
Authors: Yuan Shi Ji , Sun Ming Feng , Liu Zhi Hua , Huang Wen Jing
Published: August 2013

The classical Montgomery ladder algorithm (MPL) is an effective way to improve the operational efficiency of elliptic curve cryptography. First, an improved MPL is proposed by loop unrolling, and then the Montgomery elliptic curve encryption and decryption process is realized using data parallel and task parallel. The experimental results show that the ratio of acceleration parallel processing efficiency can reach 70%, and the method can effectively improve the speed of elliptic curve encryption algorithm.
A Flexible Workflow Engine for Product Design Process
Authors: Yu Cong , Yan Yan , Lv Ning
Published: August 2013

Traditional workflow engine is lack of flexibility when applied to product design process, therefore this paper designs a flexible workflow engine based on B/S architecture. Firstly, this paper analyzes the product design process and its flexibility need, then analyzes and designs the framework of the flexible workflow engine. In the framework of the engine, dynamic modifier module is an important part to realize the flexibility. Secondly, this paper illustrates the operation process of flexible workflow engine with a product design case to verify its applicability and effectiveness.
Numerical Simulation of Energy Saving at Different Air Supply Angles in Air-Conditioned Room
Authors: Yang Jun Qiang , Li Ming Jun
Published: August 2013

The air-conditioned room in small space is studied by establishing the mathematical model of the air flow arrangement for energy saving. The energy saving effect is analyzed numerically at different angles under circumstance of the most common way of one-side up supply and down return. Our results show that if air supply angle is set at , the energy utilization coefficient is maximum value,and air condition reaches best energy-saving state. Our design method can be referenced valuably for the air exit design and regulating of air-conditioned room in real project.
The Cleaning Performance Simulation of Rear Rolling Type Sweeper
Authors: Wang Zhi Qiang , Bian Xue Liang , Feng You Ning
Published: August 2013

Through analyzed the cleaning process of rear rolling type sweeper, the theoretical model of waste particle trajectory was established during the sweeper working process by using the contact theory of modern contact dynamics, and the ideal theory track of waste particle was simulated and optimized by using MATLAB. The three-dimensional solid model of the working device was created by using UG software, and virtual prototype model was completed by using ADAMS software, and rigid brush was replaced by neutral file with brush features characterize that was generated by finite element analysis software, and contact relationship of waste particle during the working process was added by ADAMS contact order, and rigid-flexible coupling virtual prototype system was completed and kinematics simulation was run. Finally, compared the trajectory curve from ADAMS simulation with the theoretical path from MATLAB, the Theoretical model was proved correctness. The theoretical research and simulation analysis was made test and verify each other. Facilitate the development of the same type of products.
Ultrasonic Slurry Concentration Meter Design
Authors: Han Xiao Min , Wang Jian Min , Wang Cong Cong
Published: August 2013

This design is based on the theory of ultrasonic attenuation,design of pulp concentration is C8051F021 microcontroller as the core of the meter, And contains the ultrasonic transmitting circuit, receiving circuit, the power amplification circuit, detection shaping circuit, LCD display circuit, 485 communication circuit. In addition to the data processing by appropriate filtering software, shield the noise and clutter signal, the rich information of real-time display, and the measurement of data transmission in serial port to a PC through the analysis and comparison.
Camera Calibration Method Based on Halcon
Authors: Zhang Zhi Xian , Liang Li , Deng Yong
Published: August 2013

Aiming at the applications of computer vision,a nonlinear image geometrical model for array CCD camera was build and the interior parameters and exterior parameters as well were analyzed.By applying Halcon calibration board with circular targets plane of matrix gridding type and functions library,a camera calibration algorithm and accuracy analysis were given.Experiments indicated that the parameters were accurate and this method is simple and it improves the calibration precision and computation speed, and has a good cross-platform portability.
Effects of Plug Position on Mannesmann Piercing in Drill Steel Production
Authors: Zhao Yu Qian , Yu En Lin , Hou Dong Xiao , Tang Xue
Published: August 2013

To enhance the microstructure properties and dimensional accuracy of drill steel, rigid plastic finite element methods were used to analysis the Mannesmann piercing in drill steel production. The three-dimensional thermal-force coupling FEM models were built with different plug position. Influence of plug position on the force and strain rate is got through simulation. The results show that the dimensional accuracy of drill steel hollow can by increased by the amount of increase plug position.
The Hydraulic Stability of Heating Network with Remote Measurement and Control System
Authors: Jiang Ju Yuan , Yin Ya Bing , Lin Nai Tan
Published: August 2013

In order to eliminate hydraulic imbalance phenomenon of the heating network, this article briefly introduces the operation principle of the system. The remote control system uses computer information and communication technology to monitor the network flow, through the pressure curve to estimate the hydraulic condition. According to the analysis of pipe resistance properties and the hydraulic balance calculation, the system will change the valve opening intelligently, to make the heating network running in a hydraulic balance condition. The vortex flow meter and flow control valve can be used to adjust the water flow of primary and secondary network, such measure will ensure the hydraulic stability of heating system, save the thermal energy consumption.
Waste Fiber Recycled Concrete Performance Based on Fracture Mechanics Research
Authors: Zhou Jing Hai , Cheng Lin , Dong Wei
Published: August 2013

This paper studies on the waste fiber strength test of 88 concrete beams crack , the beams section-dimension are 100mm×100mm and length 500mm. Research on recycled aggregate replacement ratio, the waste fiber length and incorporation, the crack height-ratio effect on fracture toughness of concrete. The result indicates that the waste fibers can effectively limit extension and perforation of crack of recycled aggregate, increasing the ductility of concrete, enhancing fracture properties of concrete and conducive to the improvement of fracture toughness of concrete.
Degradation Characteristics of Combined Rotor for Turbine Considering Stress Relaxation of Rod
Authors: Su Yong Lei , Wang Ai Lun , Li Xue Peng
Published: August 2013

Considering stress relaxation of rod under high temperature, pretightening force of rod changing with time was obtained. A finite element contact model with interface was analyzed and contact stiffness under different loads was concluded. Combining contact stiffness of the microscopic model with the stress analysis result of turbine interface, a calculating method for dynamic characteristic of combined rotor considering contact stiffness was presented, effect of rod relaxation on dynamic characteristic of combined rotor was obtained. The results showed that pretightening force of rod was decreasing due to stress relaxation, degradation of combined rotor that natural frequency drift caused by the stress relaxation of rod.
Design of the Sled Motor Based on the Bionics
Authors: Du Qiu Lei , Pan Li Ai
Published: August 2013

In this paper, bionic design of the sled motor body has been introduced on the basis of the main structural features of sled motor. The bionic design included the body design and color design. The theories of the law of formal beauty for the shape and color collocation have been rationally analyzed. And the conclusion has been achieved that there is one process from sensibility to rationality in the bionic model design and color design. It is also the design process, rule and pattern of the abstract form in bionic design.
Summary of the Developing Status of Greenhouse Tray Seeder and Seed Metering Device
Authors: Si Hui Ping , Sun Liang , Jie Chen , Wu Jun Hui , Lin Kai Yan
Published: August 2013

The precision plug tray seeder is mainly used to implement precision seeding, and it is the key equipment to accomplish the goal of mechanized and automated seedling in the greenhouse. The plug seedlings planter can greatly improve the productivity of labor and reduce labor intensity at the same time. The seed metering device is the core component of precision plug tray planter. Its performance directly influences the production, the sowing quality and the cost. The purpose of this paper is to introduce the study of the plug seedlings planter for domestic and abroad, and particularly Introduce three typical seeder (plate-typeneedle-likeroller-type). Keywords:Seeder;Seed Metering Device;Plug Seedlings;Greenhouse.
Air-Gap Magnetic Field Optimization to Reduce Losses in High Speed Bearingless Permanent Magnet Synchronous Motor
Authors: Zhang Tao , Jia Hong Yun , Zhang Hui Ping , Ji Jian Xiang
Published: August 2013

In this paper, the high speed motor hybrids with a radial-axial 3 degree of freedom hybrid magnetic bearing unit and BPMSM unit is proposed. The radial suspension force and magnetic field distributions with different magnetized mode are calculated. The losses are calculated and compared using time-stepping finite element method. The research results have shown that the high-speed BPMSM with Halbach array permanent magnet rotor has sinusoidal air-gap magnetic field, minimum losses.
Simulation and Research of Multiple Degree Freedom Vibration System Based on MapleSim
Authors: Wang Zhen , Wu Tao
Published: August 2013

To discuss the modeling method and simulation analysis of multiple degree of freedom vibration system by using the Maple/MapleSim simulation software, the seismic response of the ground buildings model and the torsional vibration of gear shaft model are used as examples respectively. The application of MapleSim in the process on signal analysis, extraction of the dynamic equation and solution of the natural frequency of multiple degree of freedom vibration system are expounded concretely. While the modeling speed is improved, this method also reduces the programming process and the difficulty of programming. It provides an effective reference for handling similar multiple degree of freedom vibration system simulation.
Force and Simulation Analysis of Thrust Rod on Heavy Commercial Vehicle Balanced Suspension
Authors: Li Zan , Shi Wen Ku , Wang Qian , Ke Jun , Teng Teng , Zhou Yu Fei , Liu Tian Yun , Wu Zhi Yong , Dong Yong Wei
Published: August 2013

The thrust rod is the key load-bearing part of the balanced suspension on heavy commercial vehicle. In order to optimize the structure and study the durability of it, we carried out the force and simulation analysis. In this paper, the model of thrust rod and guide mechanism was simplified. Under all driving conditions, force analysis was done for fully-loaded vehicle and force calculation formulae of thrust rods in different directions were derived. Multi-body dynamics model of the vehicle was established with ADAMS and we compared the differences of the two algorithms. Then the results of the two algorithms were compared with the load spectrum test results. We find the calculated results are in good agreement with engineering requirements.
Evaluation of Palm Oil Combustion Characteristics by Using the Chemical Equilibrium with Application (CEA) Software
Authors: Hosseini Seyed Ehsan , Wahid Mazlan Abdul , Salehirad Saber , Seis Mohsin M.
Published: August 2013

Variety of edible and nonedible oils can be used as the feedstock for biodiesel production. Among the edible oil source includes both virgin vegetable oils and waste vegetable oils. Rapeseed, soybean, and palm oils are most commonly used to produce biodiesel. In addition to its sources, the combustion process, the amount of produced energy, and the rate of emissions from biofuel inflammation also are crucial in to the ability of biodiesel to meet global energy demands. The level of energy produced and the rate of emissions can be evaluated with Chemical Equilibrium with Applications (CEA) software. This paper attempts to scrutinize and determine the palm oil combustion properties under various thermodynamic conditions using the CEA software.
Wear Behaviour of Palm Olein at Different Operating Temperature
Authors: Syahrullail Samion , Chiong Ing Tiong
Published: August 2013

One of the main disadvantages of vegetable oil as an industrial lubricant is its poor performance at high temperature. In this experimental work, the performance of refined, bleached and deodorized (RBD) palm olein was tested at different operating temperatures using four-ball tribometer, following the procedure of ASTM D 4172. The result produced by RBD palm olein was compared with the result by additive free paraffinic mineral oil. The result showed that the RBD palm olein had lower coefficient of friction compared to the paraffinic mineral oil. However, the wear scars on the ball bearings surface lubricated with RBD palm olein were larger compared to those lubricated with paraffinic mineral oil.
Study on Wearable Computer Applications in the Industrial Field
Authors: Wu Kai , Li Qing Shui
Published: August 2013

Wearable computer will give a huge impact on traditional industries, which can effectively overcome the traditional industrial areas in the mobile monitoring, data acquisition, and the difficulties encountered by the large and complex equipment installation, maintenance and breakdown maintenance, special industrial field operations, remote collaboration. This paper is to study the wearable computer applications in the industrial field, and wearable computer design specifications. The model of the hardware and software is designed based on these indicators, and study and design a complete design.
Analysis of Oligopoly on Electric Power Market under Asymmetric Information
Authors: Luo Yong , Li Fang
Published: August 2013

Aiming at finding the effect of load changing on electricity market, this paper studied Cournot model with asymmetric information based on load forecasting. Firstly, a perfect competition market structure with asymmetric information was built, and a market equilibrium price was obtained based on Cournot model with no load forecasting. Then, using game theory, the impact of load forecasting on intrinsic market power is evaluated analytically based on Cournot model. Finally, the relationship between market equilibrium price, generators profits and the load forecasting result k was obtained by numerical simulation. Some insights were got from this paper. The accuracy of load forecasting will directly affect profits of investment, market equilibrium prices and market forces. And load forecasting is useful if the forecasting error rate is held under 33%. Therefore, the key is to improve the accuracy of load forecasting.
An Improvement Inspection Policy for C2F6 Gas Used in Semiconductor Manufacturing
Authors: Huang I Ping , Chyu Chiuh Cheng
Published: August 2013

This research proposes an inspection policy aiming to improve the application of C2F6 in semiconductor manufacturing. For the gas product C2F6, total inspection is commonly employed by the producers before it is sent to downstream manufacturers. The study develops a Bayesian rectifying inspection sampling model with the objective of minimizing expected total cost from the producers standpoint. The factors that influence the total cost include gas product quality, inspection cost, sampling information, product failure cost, inspection accuracy, and decision on the remaining units. Influence diagram is used to represent the problem and derive the total objective function. The application of the model is presented via a real world company using the last four years of data. The proposed inspection policy yields an average of 15% cost savings using a cost reduction estimation method based on hyper-geometric distribution.
Abrasive Granularity Impact on Water Jet Technology Head Vibrations during Cutting Steel
Authors: Bicejova Luba , Pavlenko Slavko , Maščeník Jozef
Published: August 2013

The submitted paper deals with analyses of impact of water jet technology head vibrations due to variations of kinds and granularity of abrasive during steel cutting manufacturing process using AWJ technology. The paper points at necessity to diagnose and subsequently eliminate possible sources of adversed vibrations. They can influence lifetime and wear of water jet technology head, they can lower reliability as well as cutting edge quality.
Fault Diagnosis and Prognostic Methods Based on Hybrid System Theory for MEHI Systems in Aircraft
Authors: Wen Zhen Hua , Hou Jun Xing , Jiang Zhi Qiang
Published: August 2013

Health management is the primary technical approach to ensure the safety and reliablity in aircraft. The degradation process of Mechanical Electrical and Hydraulic Integration (MEHI) systems have the characteristics of the hybrid system. In this paper, we firstly review the research on the hybrid systems in recent years, then based on the hybrid system theory , present the fault diagnosis and prediction for MEHI system in aircraft. Lastly proposes a fusion method for predicting the failure time based on the data-driven and system physical characteristics.
Comprehensive Dynamic Model of a Viscously Damped RF-MEMS Switch Including Squeeze Film and Impact Force Effects
Authors: H. El-Sinawi Ameen , A. Awad Omar , H. El-Sinawi Abdulaziz
Published: August 2013

This work presents a new approach to modeling the dynamic behavior of a viscously damped RF-MEMS switch. The model takes into account the effect of squeeze film on resonance frequencies of the switch structure. It also presents a new approach to modeling the impact force as well as its effect on transient pull-in, and release dynamics of the perforated switch membrane. Simulation results of the proposed model are validated against experimental results of the same exact switch, and the comparison was impressive. Model results show that the model is able to capture the experimental behavior of the switch with less than 2% error.
The Realization of Moving Target Tracking
Authors: Li Guang Long , Zhu Xiang Bin , Geng Hai
Published: August 2013

This paper is mainly talking about processing, analysis and understanding of video signal in intelligent video surveillance, and we designed an efficient target detection and recognition model. Through the model to detect the target object in motion and then track the detected target. Eventually we achieved real-time monitoring of the unguarded areas. The focus of this article is about how to achieve the moving target tracking in OpenCV (Open Source Computer Vision Library) environment.
An Improved Space Vector Modulation Method of Matrix Converter
Authors: Sun Jin , Zhang Lei , Wang You Min , Zhang Jun Chao
Published: August 2013

Based on study of space vector modulation, cca novel over-modulation strategy of matrix converter is proposed for the problem of low voltage transfer ratio of matrix converter. According to the relation of the voltage space vector trace and hexagon trace vector, the control level is divided into linear modulation level and over-modulation level. The over modulation strategy is achieved by transforming the voltage modulation coefficient. The simulation results demonstrate that the voltage transfer ratio can be up to 0.955.
An Improved and Realized Volatility Strategy of the Ant Colony Optimization Algorithm
Authors: Cui Fang Song , Feng Wei , Pan Da Zhi , Cheng Guo Zhong , Yang Shuang
Published: August 2013

In order to overcome the shortcomings of precocity and stagnation in ant colony optimization algorithm, an improved algorithm is presented. Considering the impact that the distance between cities on volatility coefficient, this study presents an model of adjusting volatility coefficient called Volatility Model based on ant colony optimization (ACO) and Max-Min ant system. There are simulation experiments about TSP cases in TSPLIB, the results show that the improved algorithm effectively overcomes the shortcoming of easily getting an local optimal solution, and the average solutions are superior to ACO and Max-Min ant system.
3-D Imaging Based Ultrasonic Phased Array Theory for Composite Structure Damage Identification
Authors: Sun Ya Jie , Zhang Yong Hong , Qian Cheng Shan , Zhang Zi Jia , Wang Qi
Published: August 2013

The Lamb wave phased array theory is utilized to analysis the damage scattered signals to identify the structure defect. The damage scattered signals are gotten by comparing the health signals with the damage signals. Phased array theory based structural health monitoring can scan the structure in a certain range of 0°~180° by controlling the time delay of the excitation signals and the response signals. The processed signals in monitoring direction is shown on 3-D imaging to express the damage location in the structure. The method is verified by the experiment on the composite structure and the result shows that the Lamb wave phased array method can detect the damage in the composite structure and the 3-D image clearly displays the structure damage location.
Optimization of Combustion Characteristics of Mg/PTFE Fuel-Rich Pyrotechnical Propellant Based on Neural Network Tool Kit of MATLAB
Authors: Fan Lei , Pan Gong Pei , Ouyang Di Hua , Chen Xin , Guo Bin
Published: August 2013

Configuration and algorithm of BP neural network and characteristics of MATLAB programming language are introduced in this article. Establishing BP neural network becomes easy with relevant functions of design, training and simulation of neural network provided by neural network tool kit of MATLAB. Users can call relevant programs according to their own requirements without being bothered about writing huge amount of algorithm programs. This paper discusses the methods and procedure of designing BP neural network with MATLAB neural network tool kit in detail. Optimization of combustion characteristic of Mg/PTFE fuel-rich pyrotechnical propellant was taken as an example to verify the feasibility of the approach.
T-Wave Alternans Detection Analysis and Software Design
Authors: Yan Kang Hui , Wan Xiang Kui , Dai Lin
Published: August 2013

ECG machine, currently on the market are generally not a function of the T-wave alternans detection analysis. Studies have shown that T-wave alternans can accurately predict sudden cardiac death, higher predictive accuracy in the case of combination of left ventricular ejection fraction (Left Ventricular Ejection Fraction, LVEF). This paper presents the design of function modules of T-wave alternans software based on the QT environment. Focus on the data processing module of the software, such as the QRS wave detection, T wave detection, the matrix of the T-wave extraction, T-wave alternans detection.
Artificial Neural Networks for Structural Health Monitoring of Helicopter Harsh Landings
Authors: Vallone Giorgio , Sbarufatti Claudio , Manes Andrea , Giglio Marco
Published: August 2013

The aim of the current paper is to explore fuselage monitoring possibilities trough the usage of Artificial Neural Networks (ANNs), trained by the use of numerical models, during harsh landing events. A harsh landing condition is delimited between the usual operational conditions and a crash event. Helicopter structural damage due to harsh landings is generally less severe than damage caused by a crash but may lead to unscheduled maintenance events, involving costs and idle times. Structural Health Monitoring technologies, currently used in many application fields, aim at the continuous detection of damage that may arise, thereby improving safety and reducing maintenance idle times by the disposal of a ready diagnosis. A landing damage database can be obtained with relatively little effort by the usage of a numerical model. Simulated data are used to train various ANNs considering the landing parameter values as input. The influence of both the input and output noise on the system performances were taken into account. Obtained outputs are a general classification between damaged and undamaged conditions, based on a critical damage threshold, and the reconstruction of the fuselage damage state.
Control System Integration for Dual Clutch Transmissions Based on Modular Approach
Authors: Liu Yong Gang , Lei Zhen Zhen , Lu Li Lai , Chen Liang
Published: August 2013

Modular approach has been adopted in this paper to divide DCT transmission control unit into four modules, which are clutch control, synchronizer control, shift assembly control and vehicle control respectively. The function for each module has been analyzed and the control logic relations among these modules have also been established for modular integration. Moreover, the modeling process and control strategies for each module have been established for respective control objection. On this basis, the simulation model of transmission control unit for DCT has been built using the Matlab/Simulink platform, and the simulation has been carried out at given throttle opening. The results show that the control strategy of transmission control unit for DCT has been validated, which provides theoretical basis for DCT product development.
Strengthening and Toughening of Unsaturated Polyester by Using Some Additives in Gear Application
Authors: Najim A. Saad , Nizar Jawad Hadi , A-Rida Russul Mohmmad
Published: August 2013

In present paper a new composite materials of (polyester/ (GF, SiC, PVC, Cu)) was prepared and studied to be used in gear applications. Samples were prepared with range of short length fiber (0.02-0.08 mm) and the weight fraction of E-glass fiber varying from (0-25)% . The best sample according to the wear resistance criterion was selected and some additives were used to improve impact, tensile, hardness, and thermal conductivity . These additives are 5% SiC, 6% PVC and 4% Cu. Samples properties were evaluated by using standard mechanical and physical testing. The results show improvement in all mechanical and thermal properties. Although the tensile strength decreases with increasing volume fraction of fiber content.
Tool Selection for Machining of Free Form Surfaces
Authors: Ersoyoglu Ali Serhat , Ünüvar Ali
Published: August 2013

The most important factor that affects the cost of the processing of free-form surfaces are cutting tool data. Therefore in this study, we develop a tool selection algorithm to manufacture of free form surfaces with minimum cost and time. This system can read surface information from IGES file and convert to NURBS and than determine convenient tools. The developed system in this study is implemented with Visual C++ and tested with machining of free form surfaces. As a result of testing, we have seen the tool path with developed system is shorter than conventional methods.
Buoyancy Effect on the Wake of a Confined Circular Cylinder during Opposing Laminar Mixed Convection Heat Transfer
Authors: Guillén Iván , Treviño Cesar , Martínez-Suástegui Lorenzo
Published: August 2013

Particle image velocimetry (PIV) measurements are carried out in an experimental investigation of transient laminar opposing mixed convection to assess the thermal effects on the wake of an isothermal circular cylinder placed horizontally and confined inside a vertical closed-loop downward rectangular water channel. The buoyancy effect on the flow distributions are revealed for flow conditions with Reynolds number based on cylinder diameter of Re=170, blockage ratio D/H=0.287, aspect ratio, L/D=6.97 and values of the buoyancy parameter (Richardson number) of Ri=0 and 1. Results show that the wake closure length and Strouhal number slightly decrease for increasing Richardson number.
Simulation of 2-D Dam Break Using Improved Incompressible Smoothed Particle Hydrodynamics Based on Projection Method
Authors: Pourabdian Majid , Qate Mehran , Javareshkian Alireza , Farzbod Ali
Published: August 2013

This paper deals with numerical modeling of water flow which is generated by the break of a dam. The problem is solved by applying a new Incompressible Smoothed Particle Hydrodynamics (ISPH) algorithm based on projection method. The proposed ISPH model has two steps. In the first step, the incompressibility of fluid is maintained regarding to the changes of intermediate and initial particles densities at the first half-time step (stability step). In the second step, by computing the divergence of the intermediate secondary velocity at the second half-time step (accuracy step), the incompressibility is satisfied completely. In fact, by using this method both stability and accuracy are increased. The simulation illustrates the formation and subsequent propagation of a wave over the horizontal plane. It is shown that the model predictions compare well with experimental data.
Numerical Analysis of Superplastic Forming for Sandwich Structure of 5083 Al-Alloy
Authors: Liu Shou Fa , Dou Xiao Li , Wu Song Li
Published: August 2013

Finite element analysis of superplastic forming process for a hollow sandwich structure of aluminum alloy was carried out with MARC software, which can predict the thickness distribution of the structure, and optimize the pressure-time curve to control the maximum strain rate, which provided reference basis for the forming pressure of the subsequent experiment.
Seepage Characteristics Analysis of Geomembrane Earthrock Dams
Authors: Peng Yun Feng , Hao Dan
Published: August 2013

As a new kind of seepage control material, the geomembrane has been widely used in embankment dam, yet the seepage characteristics and effect of the geomembrane have not been studied on theory. Based on seepage mechanism in geomembrane, this thesis classifies the seepage into two types: one is permeability of geomembrane itself; the other is defect leakage flux in geomembrane. After studies respectively the influencing factors of permeability and defect leakage flux in geomembrane, the corresponding engineering measures were summed up. The study shows that the reasonable design and careful construction are requisite condition for the success of geomembrane seepage prevention works. At last, the philosophy of leak-position detection with electricity and its function in construction quality assurance was described.
Three Gorges Reservoir Water Level Fluctuation Influents on the Stability of the Slope's Analysis
Authors: Wu Li Ming , Wang Zhen Qiang
Published: August 2013

Since the three Gorges reservoir Water storage, reservoir water level have about 30m water levels fluctuation every year, different level will lead to the bank slope infiltration lines rise and fall, and influent on the bank slopes stability. The test according to Manzo reservoir laboratory test data and geological survey report, using the finite element software of ANSYS to establish the finite element model. The model put different water level decline speed, different osmotic coefficient and the different infiltration recharge tension cases to analysis separately,the result shows:1) more greater the reductions speed, more steeper the saturation lines luffing, more adverse the slopes stability;2) more smaller the permeability coefficient, more poor the slopes drainage capacity,more steeper the infiltration line, more poor the slopes stability; 3) seepage lines position higher than no infiltration seepage lines position.
The Numerical Simulation Analysis of Irregular Frame Structure Dynamic Characteristics
Authors: Zhang Fang
Published: August 2013

A bump of irregular frame structure as an example, the use of ANSYS software, the structure dynamic characteristics analysis, given the cycle ratio and modal participation mass percentage, as the bump of irregular frame structure design reference.