bluuebunny/crossref_metadata_2025 huggingface dataset:
A Reclamation System via a Pins-Module Tool for Touch Sensing Material Surfaces
Authors: Pa P.S.
Published: August 2013

This study demonstrates a designed pins-module tool and a precise reclamation system using a micro electroremoval process for sensing material of tin-doped indium oxide thin-films dissolved from a surface of polyethylene terephthalate of touch-panel. In the current experiment, a higher dissolution rate of the defective tin-doped indium oxide corresponds to high rotational speed of the cylinders tool with large flow rate of the electrolyte. A small diameter of the anode or a small diameter of the cathode combined with enough electric power, results in fast dissolution. The removal rate of tin-doped indium oxide thin-film is improved by decreasing the cylinders number. Importantly, the performance of a designed pins-module tool was found to be more effective in the micro electroremoval process. It requires only a short period of time to dissolve the nanostructured of tin-doped indium oxide easily and cleanly.
A Study on Deviations of the Jet with Traverse Speeds on Different Materials in Pocket Milling Using Abrasive Water Jet Machining Process
Authors: Gupta T.V.K. , Ramkumar J. , Tandon Puneet , Vyas N.S.
Published: August 2013

The current trend in abrasive water jet machining process is getting focused on milling applications using this technique. Abrasive water jet machining (AWJM) process is a well defined process for cutting or part separation. The present paper reports on the geometry obtained in controlled depth milling process of different materials. The dimensions considered in this paper are the pocket depth and the change in the kerf profile. Experimental observations are made relating the kerf profile with traverse speed and the mechanical properties of the work piece material. Tool paths for obtaining the pocket of size 9 mm x 20 mm are generated in raster mode and machined using AWJM on materials of varying hardness and at different traverse speeds. It is observed that there is a significant change in the geometry of the kerf profile and also the depth of the pocket with speed in conjuction with the material hardness.
Design and Analysis of Automotive Multi-Leaf Springs Using Composite Materials
Authors: Suprith N. , Annamalai K. , Naiju C.D. , Mahadevan Arjun
Published: August 2013

One of the oldest suspension components that are still in use, especially in commercial vehicles, is leaf springs. Due to high strength to weight ratio, the automobile industries have shown interest in replacing steel springs with composite leaf springs. This work is carried out on multi leaf springs having nine leaves, used in commercial vehicle. A Finite element approach for analysis of a multi leaf springs using ANSYS software is carried out. The model is generated using solid works and imported in ANSYS. The material of the leaf springs is 65Si7 (SUP9), composite leaf springs and hybrid leaf springs. Fatigue analysis of leaf springs is carried out for steel leaf springs, and Static analysis for steel leaf springs, composite leaf springs and hybrid leaf springs.
Vibration Characteristics and Optimization of Variable Cross-Section Cylindrical Shell Structure under Multi-Point Excitation
Authors: Chen Lin , Xie Xiao Zhong , Li Zhuo , Pang Fu Zhen
Published: August 2013

According to the loading feature and the structure form, a gear reducer box can be simplified to a variable cross-section cylindrical shell structure excited by multipoint force. Meanwhile, a theoretical model is developed to analyze the structural vibration and acoustic characteristics and to find out the dominant component of vibration. Then, the influence of different parameters, such as, the local structure thickness, constrained damping layer and the insulation layer on acoustic radiation performance of the variable cross-section cylindrical shell structure are investigated by numerical calculation. Finally, an optimization design scheme of a low-noise structure is proposed because of the two aspects about noise source and noise transfer path.
Photovoltaic Systems in University of Miyazaki
Authors: Yoshino Kenji , Nishioka Kensuke , Fukuyama Atsuhiko , Suzuki Hidetoshi , Otsubo Masahisa
Published: August 2013

We organized a project of solar cells in University of Miyazaki in order to develop the technologies for solar cells. We have four kinds PV module systems, such as hybrid Si Thin film (1 kW), Poly-Si (50 kW), CIS (100 kW) and CPV (14 kW×2). Their total is 179 kW. These take appoximately 5% of total electricity of the university.
Study on Refinement Mechanism of Sc and Zr as-Cast Al-7.2Zn-2.2Mg-1.8Cu Alloys
Authors: Wang Zhi Gang , Xu Jun , Li Bao , Zhang Zhi Feng
Published: August 2013

The effect of trace Sc and Zr on grain refinement of Al-7.2Zn-2.2Mg-1.8Cu as-cast ingot was studied by using optical microscopy and scanning electron microscopy with EDS. The results show that addition of only 0.20% Zr or 0. 20% Sc to Al-7.2Zn-2.2Mg-1.8Cu alloy can refine grains to a certain degree, and the addition of 0.10% Sc+0.20%Zr leads to stronger grain refinement, the average grain size is only 10-15μm. Al3Sc/Al3Zr composite particles in the melt work as the nucleation of heterogeneous nucleation during solidification.
The Research of Bohai Sea Fishery Metadata Based on the Semantic Web
Authors: Du Mei Fang , Ge Shi Yu
Published: August 2013

To solve the problem of heterogeneity of Marine fisheries data and information island phenomenon, this paper is based on semantic Web technologies, suitable for fishing industry characteristics of data sharing and management mechanism, establish a unified interface standard information platform, develop the physical and chemical database metadata specifications, develop and release corresponding metadata management tool, to assist and guide the professional data center to complete the professional database metadata construction, for scientific and technological progress and innovation, government decision-making and support economic development.
Application of Variable Precision Rough Set and Integrated Neural Network to Bearing Fault Diagnosis
Authors: Niu Xiao Ling , Liu Bo , Lin Ke Zhang
Published: August 2013

The integration of variable precision rough set and neural network is introduced into the bearing fault diagnosis. VPRS-INN fault diagnosis method is proposed: First, utilize the information entropy method for discretization of continuous attributes, and then use attribute dependence degree of the variable precision rough set theory for heuristic reduction. based on the reduction, obtain the optimal decision support system. Finally according to the optimal design system, we design a integrated neural network for fault diagnosis. instances have proved the feasibility and high fault diagnosis rate of the method.
The Application of Entropy Weighting Ideal Point Method in Weapon and Equipment System of Systems Construction Risk Analysis
Authors: Zhao Zhi Qiang , Hao Jia Xin
Published: August 2013

The weapon and equipment system of systems (WESoS) construction risk analysis is great significance to enhance decision-making and management level of information technology WESoS construction. The concept of "entropy" in the information engineering is using to calculate the entropy, and the entropy weight is used to fix subjective weight, after that Combining ideal point method to evaluate and select the schemes, the best decision of WESoS construction is get. The model is of impersonality and in reason, which provided a simple and practical method for construction risk evaluation of WESoS.
The Hybrid Parallel Algorithm of Online Verification Based on P2P
Authors: Liu Gao Ming , Wang Xiao Bo , Song Wei , Li Chong Zhan
Published: August 2013

Taking into account the gradually expanded scale of large interconnected power system, especially the UHV synchronous grid successfully puts into operation. Traditional centralized computing will encounter the bottleneck of hardware computing power. A protection setting online checking hybrid parallel algorithm based on P2P is proposed. Peer-to-peer communications using P2P network technology to achieve inter-regional information fast interactive. The design of MPI+OpenMP hybrid parallel programming models and algorithms is emphatically introduced. Online checking two levels parallel of process-level and thread-level is achieved through the parallel analysis of online checking. Finally, the hybrid parallel algorithm was tested and compared based on P2P technology distributed parallel computing platform. The results show that the proposed algorithm is correct and effective.
Research on Setting Calculation Dynamic Partitioning Based on Data Center
Authors: Wang Xiao Bo , Song Wei , Gong Ren Min , He De Jun
Published: August 2013

This paper deals with the setting calculation data center (SCDC), which is based on Common Information Model (CIM). The construction consists of data splicing and graphics stitching. The splicing method of the information related to setting calculation gains more attention, especially the operation mode. Further more, it brings up a method called dynamic partitioning to improve calculation efficiency. It gives a proper element range relying on the maximum and the minimum operating modes provided by the grid. We only need to consider the network elements in this range to involve in setting calculation. Out of this range we use a simplified equivalent model. At last, the effectiveness and accuracy of the algorithm are verified by the result of the practical example and it is reasonable and effective in its application in engineering.
Analysis and Control of the Closed-Loop Current Based on Power Flow Calculation in Distribution Network
Authors: Gui Bao Li , Lu Jin Ling , Zhou Qing Jie , Gong Ren Min
Published: August 2013

With the development of our country electric power enterprise, closed-loop pour load operation has become increasingly frequent in power distribution network, the resulting circulation problems affect the safe operation of power grid. The calculation method of system is used by BX type solution fast decomposition method and it is very suitable for distribution integration, by the method we can calculate the steady state current and transient current of closed-loop. It also provide accurate current analysis and control. With analysis of examples, finally indicates that the method can offer good for dispatch staff for closed-loop operation decision support, and it has a certain guiding significance.
Research on Condition Evaluation Method of Relay Protection Based on Reliability Indices
Authors: Ren Huan , Xu Yan , Zhou Qing Jie
Published: August 2013

A method for condition evaluation based on reliability indices is proposed in this paper. The paper defines the reliability indices: failure rate, MTBF and availability. The condition evaluation system is proposed based on the contents of repair work and the structures of both protective device and the secondary circuit. The reliability indices are applied to evaluating the protection condition.
Analysis on Lightning Overvoltage of 500kV Substation
Authors: Shao Yu , Shao Ming , Shi Feng , Wang Kun
Published: August 2013

The article used the ATP-EMTP to study over-voltage condition of each device and propose the corresponding measures to limit over-voltage in a safe range, to ensure the security of the system and stable operation. The article has great means to the actual analysis of lighting disturbance.
A New Nonlinear Iterative Learning Controller for Road Simulator
Authors: Xu Gang , Zhou Jun Yu , Zhou Hong
Published: August 2013

A new model based nonlinear iterative learning controller to replicate multiple reference trajectory is presented. The approach consists of a constrained Gauss-Newton numerical optimization algorithm, which is able to inverse a nonlinear system accurately. It uses the moving horizon idea from MPC to improve the computational efficiency. Combined with a class of nonlinear state-space model and an existing nonlinear iterative learning control scheme, this allows accurate tracking control of a nonlinear system. Numerical results are used to illustrate the algorithm.
Time Delay Model for SRAM Compiler
Authors: Song Qiang , Peng Chun Yu , Zhou Hong Gang , Tan Shou Biao
Published: August 2013

In this paper, we introduced an effective time delay model for SRAM compiler, which represents an important performance of SRAM. Our method divide the delay time into several periods, including decoder delay, word line delay, bit line delay and SA delay. The theory is useful in predicting the delay time when the SRAM size is changed. Simulations by Hsim in 65nm CMOS process proves a high accuracy.
A Study on Dynamic Inversion of UAV
Authors: Tou Ka Hou , Yang Jian Ying
Published: August 2013

In this paper, preliminary effort of pre-flight test lateral control method study is presented. Parameters and coefficients of candidate UAV (Unmanned Aviation Vehicle) are calculated for modeling and linearization. For controller design, dynamic inversion is used to cancel the dynamic coupling between attitudes. Stability of inversion loop controller which applied on non-ideal inversion is studied. Finally, simulation is present to compare the PI and nonlinear PI controller based on dynamic inversion.
Design of Process Management for ARM Based Multi-Process Mono-Kernel
Authors: Qu Bo
Published: August 2013

This paper describes design and implementation of process management for ARM based multi-process mono-kernel, including creation of init process, process fork, process exit, process waiting, process switching and process schedule. An example is provided at the final of the paper to show the effect of process management for the mono-kernel. The entire kernel is developed from scratch by the author of this paper on Linux with GNU tool chain, suitable not only for further research but also as embedded OS design demo for related curriculum teaching.
The Design of High-Speed Data-Collection System Based on EZ-USB FX2
Authors: Mo Guo Min , Guo Ya Hong , Zhang Jun An
Published: August 2013

A high-speed data collection and transfer system is designed in this paper. The hardware system is based on EZ-USB FX2 and high speed A/D sampling model based on MAX1198. The frame of hardware is discussed in details. Finally, the solution of software and the firmware flow are provided. The designed system has many advantages such as high-speed, plug and play, easiness to use and expand. It can be used for reference in universal research of real-time and high-speed data transfer system.
Implementation of High Power Power-Over-Ethernet System Based on LTPoE++
Authors: Huang Jian Yu , Zhang Qi Sheng , Zhang Sheng Quan
Published: August 2013

A new Power over Ethernet (PoE) proprietary specification known as LTPoE++ and its solution for high power PoE system is introduced. A 90W single port high power PoE system based on the LTPoE++ solution using power sourcing equipment (PSE) controller LTC4274A-4 and powered device (PD) controller LT4275A produced by Linear Technology is illustrated, including overall structure, features, hardware frames, functions and their implementation. Finally working process of the system is analyzed.
Information-Based Path Analysis of the Career Guidance for Chinese College Students from a Comparison Perspective
Authors: Liu Lu Ji , Cheng Fang
Published: August 2013

The information technology application of the career guidance for college students is the organic integration of the career guide ideas and the technological innovations. It is also an inevitable trend and requirements of the career guidance for college students to move forward under the new circumstances. Therere still big gaps between our current graduate career services information website and foreign countries in the network resource integration, the employment environmental prediction, the socio-professional status, the information service system, the career education curriculum development, the vocational aptitude measurement and on-line counseling, etc. The information-based paths of the career guidance for college students mainly are the career information network and its rational application, the diversity guide contents and its innovation methods, and the personalized main requirements and its interactive exchanges, and construct a comprehensive and compatible database of employment information platform, etc.
An Intelligent Customer Service Representative Operating System
Authors: Wang Wei Min , He Dong Chun
Published: August 2013

In this paper, we introduced an intelligent Customer Service Representative (CSR) Operating System. The system contains three modules: Knowledge Management (KM) module, Natural Language Process (NLP) module and CSR Operating (CSRO) module. The KM module manages knowledge. When get query through phone, Internet, Fetion, QQ, etc. from customer, the NLP module understands the query and gives recommended reply. If confirms that the reply is right, NLP module replies the query automatically. The CSRO module confirms that the reply is right or retrieves the right reply quickly from the knowledge base, and gives the reply. The system can increase self-service scale and improve CSR's efficiency. The system has been successfully used in a domestic telecom company since May 2010, and achieved a satisfactory result.
Physiological Signal — Based Engagement Level Analysis under Fuzzy Framework
Authors: Ismail Elliana , Ghazali Aimi Shazwani , Sidek Shahrul Naim
Published: August 2013

The paper presents real-time affective state detection, in particular, the engagement level detection by using physiological signals under fuzzy framework. In order to develop the fuzzy model, the engagement model is developed by using data collected from controlled design experiment. In measuring the level of engagement, the physiological signals; namely the Electrooculogram (EOG) is recorded using G-tec data acquisition system. In the experiment, the data collected are the average endogenous eye blinks and the average trajectory errors recorded from the trajectory that the subjects have to follow in completing specific tasks. For the tasks, the subjects are asked to track a set of prescribed paths within the allocated times and have to obey different speed constraints. Various shapes of trajectories are given to the subjects in order to study the level of engagement while performing the task. The data then are used to develop the fuzzy model to measure the level of engagement (LOE) of the subjects. Following the experiments, a series of questionnaires are given to the subjects to verify their engagement level when performing the experiments. Preliminary analysis on the data shows a good match between the experimental results and the questionnaire.
Design and Implement a Computer Network Security Education Game on
iOS
for University Students
Authors: Liang Hui , Shi Min Yong
Published: August 2013

Internet attack is increasing and causing enormous economic loss in recent years. The network security literacy learning for educating students to defense Internet attack becomes more important. With the rapid development of computer and the mobile communication technology, the concept of entertainment is not new in todays Mobile Learning life and its purpose is to make the learning process more enjoyable when making people gain learning environment and resources anytime and anywhere. This paper integrates a funny computer network security education game into an iOS-based M-Learning platform which makes the learning process more fun and effective for its student end-users.
Application of Ontology Technology in Agricultural E-Commerce
Authors: Dong Wei , Zhang Jing , Zhu Jie , Liu Xu Ning
Published: August 2013

To solve the problems of semantic heterogeneity in agricultural e-commerce, improve standardization of agricultural products in agricultural e-commerce, the agricultural e-commerce is investigated from the perspective of ontology. The paper firstly introduces the concept and theory of ontology, analyzes agricultural products activities during the process of e-commerce, and evaluates the application of ontology technology in agricultural e-commerce, then develops the e-commerce standards for the agricultural products, and builds the ontology knowledge base of agricultural e-commerce, implementing the standardization of agricultural knowledge in agricultural e-commerce. The simulation results indicate that the application of ontology in the agricultural e-commerce solves the problems of traditional agricultural e-commerce, and provides sharing platform for the agricultural knowledge, contributing to the development of agricultural e-commerce.
Design and Implementation of an Elementary School Online Registration and Enrollment Position Allocation System Based on Three-Tier Architecture
Authors: Chen Zhan Fang , Zhang Xiao Ming , Chen Qi Chang , Ma Teng Fei , Wang Huan , Feng Xin
Published: August 2013

With extensive and thorough research on the three-tier B/S/D architecture and software development theory, we develop an elementary school online registration and allocation system using the bit-operation and template layered management technology in authorization management and implemented a three-tier management information system for Changchun city educational bureau, districts educational bureau to local elementary schools. In the allocation module, we propose an isometric random sample algorithm which is a fair and efficient allocation algorithm. Later, we discuss our in-depth analysis on the overall framework of the platform and each function module of the elementary school online registration and allocation system.
The Birthday Problem of People with a Given Distribution
Authors: He Lin Xi , Zhang Zhi Gang
Published: August 2013

The problem of birthday is an ancient and interesting problem in probability theory. The traditional birthday problem has a conclusion that the probability of the same birthday among people will reach 50% when the number of people reached 23. This paper studies the issue of people with a given distribution and discusses the probability that people have the same birthday among a given crowd.
Position Control of 3-DOF Underactuated Manipulators with Last Passive Joint Using Fuzzy Logic Control
Authors: Xia Qi Xiao , Yu Yue Qing , Ren Zhi Quan
Published: August 2013

Underactuated manipulator is one kind of second order nonholonomic dynamics systems. How to control this system is still an open problem. This paper proposes a fuzzy strategy to control three DOF underactuated manipulator with a last passive joint. Four measures are selected to construct the fuzzy logic controller. The four measures are divided into two classes; one class is concerning first link, another class concerning the second link. Four fuzzy logic processors are designed to deal with the measure errors, respectively. The four fuzzy logic processors are also divided into two classes according to the two measure classes. Then, the processed results from the four processors are composed to produce control signs to compensate the errors occurring in the manipulator motion. This method simplifies the design of the fuzzy logic controller. Finally, numerical simulation verifies the fuzzy controller.
Research on Railway Information Service Architecture Based on Grid
Authors: Qin Yu Yang , Wang Xi Fu
Published: August 2013

In order to meet the demand for railway information service, Discussed the grid connotation and the theory of grid architecture, used Service-Oriented idea, the architecture of railway information service was proposed in the grid environment, the level of architecture was determined, Meanwhile composition, functions and the hierarchical relationship of the architecture were discussed in detail, the research focus on providing the top guidance for the construction of the railway information grid system.
A New Forming Method of Tapered Wire-Pole with Square Cross-Section
Authors: Xia Hong Yan , Qi Zhan Jun , Wu Di
Published: August 2013

It is difficult to give shapes for tapered wire-pole with square cross-section in conventional plastic working process. A new dieless drawing method for making wire-pole has been developed. Through the dieless drawing theoretical study and experimental analysis of the wire-pole, a new wire-pole dieless drawing process is developed. The methods to ascertain key technique parameter are given out and the drawing velocity model is established. The experimental study shows that the dieless drawing technique is reasonable novel, the equipment is simple and one dieless drawing production procedure can replaces complete forming procedure in the general for tapered wire-pole dieless forming, which completes the deformation heat treatment, enhances the product’s overall performance simultaneously and has the practical value.
Design and Analysis of the Quadruped Walking Robot Based on 3-RPS Parallel Mechanism
Authors: Wang Hong Bo , Wang Yun , Sang Ling Feng , Gu Qi Fang , Feng Yong Fei
Published: August 2013

Based on the importance of the robot for the elderly and the disabled, a quadruped walking robot using 3-RPS parallel mechanism as the basic leg mechanism is proposed. The structure of the basic leg is described, and the whole structure of the quadruped walking robot is formed. Then taking the workspace of the basic leg as the standard, the optimum size parameters of the upper platform and the lower platform of the based leg are achieved. Meanwhile the workspace of the basic leg is obtained by the anti-solution search method. Taking the basic leg as analysis object and applying the virtual organization method, the kinematic expression is got. All of these analyses lay a theoretical foundation for the further study on the quadruped walking robot with parallel leg mechanism.
PC the Study of KF Technology in Metal Mold Standard Components Modeling Application
Authors: Shu Yu Feng , Fan Si Li , Zhang Hai Ying
Published: August 2013

Discusses the Dongguan Changan mold in economic development status and the necessity to establish mold standard parts library, study the technology and related steps for product design in UG / KF environment. Using this technology to solve the problem, unable to integrate into traditional CAD design engineering knowledge and laid the foundation for enterprise storage and reuse of design knowledge, to improve design efficiency and quality and to further the design of intelligent rapid response.
Study on Throttle Methods for Hydrostatic Bearing
Authors: Jiang Gui Yun , Wang Yong Qin , Yan Xin Chun
Published: August 2013

In hydrostatic bearing, the applied load is carried through the compensatory effect of restrictors. Different throttle methods will bring different oil film rigidity and carrying capacity. There are mainly four types restrictors such as capillary,orifice,slide valve and film feedback restrictors. The mathematical models of carrying capacity and oil film rigidity of the hydrostatic bearings throttled by the restrictors mentioned above were presented. The oil film rigidity of hydrostatic bearings throttled by different restrictors were analyzed. Reynolds equation was provided and the numerical solution model was constructed. The pressure fields show the static performances of hydrostatic bearing with different restrictors.
Improved Path Planning Algorithm Based on Partial Distance Feature Vector Matching
Authors: Zhang Zhi Jie
Published: August 2013

Robotic path planning algorithm is an important research content of optimization. The improved path planning algorithm, based on distance measurement, use the feature vector for obtaining the location and for identifies different distances in search space. In order to improve the efficient of collision detection, the earth feature vector and taboo search theory were used as tools, combined with partial matching tech and fuzzy logic could get faster and more accurate outcomes than the algorithm only use fuzzy logic.
Engine Parameters Optimization Design for Mine Dump Truck Based on the Genetic Algorithm
Authors: Chang Lv
Published: August 2013

The interface is constructed between the mine dump trucks performance simulation software and the genetic algorithm, aiming at the very complex relationship between the mine dump truck engine and its dynamic performance and fuel economy. The optimization of the objective function, optimization variables and constraints are designed. Genetic algorithm is used to design type 3303B mine dump trucks. The optimization of the design results are compared and analyzed on before and after and the results show that the fuel economy of the optimization of genetic algorithm is better than the original car, fuel consumption reduced 0.51 every km.
Research on Power Systems-Driven Model of Hybrid Electric Sanitation Vehicle
Authors: Si Chuan Sheng , Shang Zhuang Zhuang
Published: August 2013

Combined with the actual situation of sanitation vehicle at home and abroad, the text analyzes development trend of hybrid electric sanitation vehicle, selected assembly-driven structure of parallel electric sanitation vehicle power systems,designed two different programs of power systems, and this program plays an important role in improving the dynamic and economy of sanitation vehicle.
A Survey Study of Factors Influencing the Customer Satisfaction of Group Buying Sites
Authors: Yang Lu Ming , Li Du Cang Hai , Yang Xu Zhao
Published: August 2013

Group buying--a new way of shopping online is emerging, customers can shopping by forming groups by themselves to persuade the sellers to reduce the price. Group buying sites greatly enhance the bargaining power between the customers and the merchants. This paper contributes to the using the factor analysis, nine factors including commodity information, trading levels, commodity inspection, the after-sales service, corporate image, website design Personality services, the quality of service and logistics distribution that will affect the customer satisfaction comes down to two factors, these two factors are defined based on Herzberg's two-factor theory, obtains the group buying customer satisfaction of the hygiene factors and motivation factors. Then based on the results give merchants more advise to improving customer satisfaction.
One New Maintenance Model of Generating Units in Power System
Authors: Zhang Xiao Qin , Feng Yu Zhao , Zhang Heng , Huangfu Wei Hua , Zhuo Ming , Chen Yi
Published: August 2013

The reliability of the power system is guaranteed mainly by electric network company under the environment of electricity market, the economic factors was considered firstly for each power plant when the maintenance schedule was established. This paper synthesizes all kinds of factors related to the economics, based on which a new model is sets up .The applicability to the power plants economics is verified by a case analysis. Keywords: electricity market; new model; maintenance; economics; reliability; power plant
Wheeled Mobile Robot Tracking Control without Velocity Measurement
Authors: Wang Qiang , Tong Guang , Xing Xin
Published: August 2013

In this paper, a new robust trajectory tracking control scheme for wheeled mobile robots without velocity measurement is proposed. In the proposed controller, the velocity observer is used to estimate the velocity of wheeled mobile robot. The dynamics of wheeled mobile robot is considered to develop the controller. The proposed controller has the following features: i) The proposed controller has good robustness performance; ii) It is easy to improve tracking performance by setting only one design parameters.
Research on the Walking Control Strategy of Roboticized Roadheader Based on the Fuzzy Control
Authors: Gong Jian , Liu Wei , Wang Fu Zhong
Published: August 2013

This paper considers the problem of trajectory deviating for a class of roboticized roadheader. The motion model of roadheader is first established based on the analysis of excavation construction procedure, then the fuzzy control strategy based on dual-modality structure is proposed to realize directional adjustment and forward-walking control. The relationship between steering angle and driving wheel speed and the establishment of fuzzy control model are mainly focused. The experiment results indicate that the control strategy can satisfy the requirements of excavation construction procedure, and the remote control of roadheader can also be conducted. It is shown that the proposed approach can take an important role in few or unattended roadheader working face construction.
Service Robot Passive Safety Impedance Mechanism Design and Dynamics Analysis
Authors: Liu Xiao , Xu Lin Sen , Zhao Jiang Hai , Luo Min Zhou , Feng Bao Lin
Published: August 2013

The wide application of service robot caused security problems between humans and robots. Through the theoretical analysis and mathematical formula based on the calculation. Designing a novel safe impedance joint mechanism consisting of an inclined link, a slider with rollers, and linear springs is proposed. Analysis the institutions of different friction between rollers and tilt links in the form of organization function at the same time. Using solidworks software to mechanism of 3D modeling, the design of two different partial CAM model, importing ADAMS software and analysis the function, Comparison between simulation data and experimental data consistency, for later used in robot mechanical arm to provide a theoretical basis.
A New Robust Tracking Approach in NLOS Environments
Authors: Wu Cheng Dong , Liu Peng Da , Zhang Yun Zhou , Cheng Long , Ru Jing Yu
Published: August 2013

In wireless sensor networks, NLOS propagation often enlarges the errors of position estimates when time-of-arrival (TOA) measurements are used. To mitigate the effects caused by NLOS propagation, herein, an EKF-based robust non-parametric approach is proposed. In this paper, we utilize the variable kernel method to obtain an approximate noise density function, which is inexpensively computational and then used to improve the mobile positioning accuracy. Note that the standard EKF often works well when NLOS error is adequately low. This property could also be used to improve the accuracy of mobile positioning. In the proposed algorithm, a hard decision is employed to choose the rational position estimate which may come from the non-parametric approach or the standard EKF. Numerical simulations show a significant improvement over the standard EKF.
Research on Dynamic Characteristic of Charging Valve of the Full Hydraulic Braking System
Authors: Ning Yue , Liu Xin Hui , Chen Jin Shi , Wang Zhan , Li Qian Wen
Published: August 2013

This paper introduce the working principle of accumulator charging valve. According to the static analysis of principle and structure of the valve, the model of accumulator charging valve was established by AMESim. which simulated the charging pressure and other charging characteristics. According to the result of the simulation, some technical advices for improving the performance of the full hydraulic system are provided. Thecomparison between simulation and experiment proved that the model of the valve was accurate and reliable. The performance of the charging valve meets the request of the full hydraulic braking system exactly.
A Multi-Rate Implementation of Auditory Filter Bank
Authors: Chen Jin Lun
Published: August 2013

The auditory filter-bank is the key component of auditory model, and its implementation involves a lot of computations. The time spent by an auditory filter-bank to finish its work has a significant effect on the real-time implementation of auditory model-based audio signal processing systems. In this paper, a multi-rate implementation of auditory filter bank is presented. Through using low sampling rate for the filters with low centre frequency, and using high sampling rate for the filters with high centre frequency, we can greatly reduce the computation requirement.
A Hand-Written Character Recognition Based on Feature Coding
Authors: Du Yan Rui , Chen Li Hui , Xie Bin
Published: August 2013

This paper analyzes the structure of character by theory and experiment, and developes a hand-written character recognition system, this system recognize character by giving feature a code. It is proved feature is simple and definite ,and this system is valid.
Image Processing Based on Improved Signal Estimation Algorithm
Authors: Chen Guang Xun , Du Yan Hui , Zhang Lei , Qin Pan Ke
Published: August 2013

The commonly used method for high resolution velocity analysis in seismic data processing and interpreting is based on signal estimation algorithm. However, the numerical realization of this method is complicated and time-consuming due to the process of signal-noise separation requiring enormous loop calculations before constructing the energy function. In this paper, we improved the method on the base of multi-trace signal estimation. This improved method made full use of amplitude information that can enhance the anti-noise ability and improve the resolution greatly. Meanwhile, this method has more economical calculation cost than other methods for it didnt require multiple loop calculations.
Rough Set Theory Based Hybrid Method for Network Intrusion Detection
Authors: Jiao Na
Published: August 2013

In this paper, we propose an intrusion detection method that combines rough set theory and Fuzzy C-Means for network intrusion detection. The first step consists of feature selection which is based on rough set theory. The next phase is clustering by using Fuzzy C-Means. Rough set theory is an efficient tool for further reducing redundancy. Fuzzy C-Means allows objects which are belong to several clusters simultaneously, with different degrees of membership. To evaluate the performance of the introduced approach, we applied them to the international Knowledge Discovery and Data mining intrusion detection dataset. In the experimentations, we compare the performance of the rough set theory based hybrid method for network intrusion detection. Experimental results illustrate that our algorithm is accurate model for handling complex attack patterns in large network. And the method can increase the efficiency and reduce the dataset by looking for overlapping categories.
Application of Variable Precision Rough Set in Power Transformer Fault Diagnosis
Authors: Gan Shu Chuan , Zhou Ai Hua , Guo Hui , Tang Ling
Published: August 2013

The variable precision rough set theory is introduced into the fault diagnosis of power transformer. Using the reduction method of the variable precision rough set,the hidden information in power transformer faults data is reduced , and the information which plays a major role in fault classification can be obtained. This approach can overcome the defects of the classical rough set, such as the sensitivity to noise of input information, and accordingly improves the accuracy of fault diagnosis. The example shows that the variable precision rough set used in the power transformer fault diagnosis, enhance the robustness of the data analysis and processing, so, the proposed approach has a more effective diagnostic performance.
Building a Temporary VM-Based Testing Subsystem for Evaluating the Validity of a Hybrid SSL-VPN System
Authors: Chen Chang Sheng , Lin Ming Hua
Published: August 2013

In this paper, we proposed to build a temporary testing system withvirtual machine (VM)technology for studying the performance issues (e.g., number ofsessions,load-sharingmechanism) and the availability of a newly built hybridSSL-VPNsystem before rolling out the service. Moreover, we had designedtesting casesto help locate the configuration bugs and/or improper settings, and use them as guidelines for re-adjusting the system configuration to meet the design considerations. As shown in the paper, using the VM technology helps make both thedeploymentand thetestof the SSL-VPN service to become more effective (e.g., easier to reconfigure the system, more scalable).
Ultra-High Resistance Measurement Based on Offset Current Compensation
Authors: Wang Xiao Jun , Zhao Yong Jie , Xue Jian
Published: August 2013

An on-line offset current compensation method is proposed to improve ultra-high resistance (UHR) measurement more accurately and reliably. Iterative compensation algorithm is firstly adopted to generate compensation current by adjusting the compensation DAC to decrease the offset current to approximate zero, and then on-line offset current measurement algorithm is employed to ensure the time-varying offset current is always in an appropriate range. This algorithm can maintain a continuous unsaturated measurement process. Experiment results show that the uncertainty (k=2) is 1.4% for 1014Ω and 5.5% for 1015Ω under ±1000V based on the offset current compensation method proposed, which has been successfully implemented in a commercial UHR meter.
Mixed Measurement State Estimation of the Equivalent Current Transformation Based on Generalized Tellegen's Theorem
Authors: Lin Gui Hua , Wang Tao , Wang Yu Ying , Zheng Li Guo
Published: August 2013

One of the most important ways to enhance the speed of state estimation is to establish the constant matrix Jacobian. This essay puts forward the state estimation method of the equivalent current transformation based on the Generalized Tellegens Theorem. This estimation method establishes the constant Jacobian matrix without neglecting the secondary factor making use of the Generalized Tellegens Theorem, solves the numerical stability problem caused by the establishment of the constant Jacobian matrix in the current state estimation, and has the advantages of a relatively rapid computing rate, making advantage of measuremnt of WAMS and SCADA system, and an unparalleled astringency. The method put forward in this essay has been verified through IEEE-30 Node System, and the efficiency of it has been fully proved by the example results.
Travelling Wave Fault Location for Distribute Cable Network Based on Distributed Measurement
Authors: Xu Yan , Qiu Shi , Shi Di Feng , Huang Guo Lin
Published: August 2013

This template carries out a three-terminal accurate fault location method for distribute cable network. It is improved from type D principle fault location method. Radial distribution network is decomposed into T-type networks. A set of formulas based on three-terminal data can calculate fault distance and find fault branch. Only first transient wave heads is needed. Shorter transmission distance makes it more accurate to extract first wave heads with wavelet. The distributed measurement offers redundant transient voltage data. These data is fully used to improve location success rate and accuracy. The simulation result in ATP-EMTP shows that the location accuracy isnt influenced by wave speed, catadioptric wave, grounding resistance and initial fault phase angle.
The Study of Manufacturing and Ingot Characterization of U-Zr Alloys
Authors: Masrukan
Published: August 2013

Manufacturing and characterization of U-Zr alloys for PWR fuel types have been conducted. At first U-Zr alloy ingot was made by melting U and Zr metal in the electric arc furnace that is equipped with a water cooler and in an atmosphere of argon gas. Ingot manufacturing of U-Zr alloy was done at Zr concentration 35%, 45%, 55% and 65% weight respectively. U-Zr ingot result was cut for testing, such as: density, hardness, microstructure and phases. Density testing was done by using Autopicnometer, hardness by using microhardness, microstructure by using optical microscope, and phase by XRD. The density test results showed that the increase of Zr will decrease the density, while the hardness tends to increase. At Zr concentration amount 35 % (U-35Zr) the U-35Zr density is 11.2409 g/cc and at concentration amount of 65% (U-65Zr) the U-65 Zr density to be 8.4673 g/cc, while the hardness at 35% of Zr (U-35Zr) the hardness is 374 HV and will be 400 HV at concentration of Zr amount 65%. The microstructure observation result showed that increasing of Zr will increase the amount of grain and δ1 phases, while the result of phases testing showed that the U-Zr alloy tested had been dominated by the δ1 phases. From this experiment can be concluded that adding of Zr will influence the physical properties, mechanical, and microstructure formed. Keywords: Manufacturing, characterization, U-Zr , fuel, PWR.
Determination of Losses & Loss Coefficients of Solar Flat Plate Collector when Wind Velocity & Tilt Angle at Zero Value – An Experimental Study
Authors: Bhatt M.K. , Sutaria B.M. , Gaderia S.N. , Channiwala S.A.
Published: August 2013

The flat plate collector is one of the most widely used device for harnessing solar energy. Measurement of various losses occurring in a flat plate collector is important for design as well as evaluation for efficiency under different conditions. The major part of overall heat loss is the top heat loss. The various losses such as bottom loss, side loss, edge loss, corner loss, sealing loss & top loss etc, are measured as well as recorded. There are forty eight thermocouples located at different points.
Comparison Analysis of Piezoelectric Vibration Control Methods for Autobody Thin-Wall Structure
Authors: Shen Chuan Liang , An Xiao Wen , Han Ye , Wang Da Xue
Published: August 2013

The piezoelectric materials have the positive and inverse piezoelectric effects. The piezoelectric elements can be served as actuators and sensors. The piezoelectric elements are adopted to control the vibration of autobody thin-wall structure. The proportional control, proportional-derivative control and independent modal space control based on LQR (Linear Quadratic Regulator) are simulated by using finite element method. The piezoelectric patched autobody thin-wall structure is simplified to a square plate with peripheral clamped boundary. The finite element model is established. The central node displacement is monitored as a control variable in these control methods. Central patched plate and surrounding patched plate are analyzed under the three control methods. The effectiveness of vibration control is obtained. Compared with proportional control, the proportional-derivative control has advantage of oscillation suppression at the beginning vibration control and has more obvious vibration control effectiveness. Compared with the above two control methods, the independent modal space control based on LQR has a better stability and vibration suppression effectiveness.
Effects of pH on Tin Nanoparticles Prepared Using a Modified Polyol Synthesis
Authors: Chee Sang Soo , Lee Jong Hyun
Published: August 2013

The effects of pH on the morphology and size distribution of Sn nanoparticles (NPs)synthesized using a modified polyol method were investigated. An ammonia solution wasused to increase the pH, and at pHvalues ranging from 10.3 to 12, the average size and size deviation of thesynthesized Sn NPs decreased with increasing pH. We believe that higherpH enhances the rate of reduction of Sn ions during the synthesis, resulting inan increase in nucleation. Therefore, theconcurrent formation of many nuclei might be the main cause for the reduction inaverage particle size and for the enhancement in size uniformity.
Effect of Rare Earth Elements on Machining Characteristics of Austenitic Stainless Steels without Lead Addition
Authors: Li Zhuang , Wu Di , Lv Wei , Kang Shao Pu , Zheng Zhen
Published: August 2013

Rare earth elements (REE) are harmless for human health. REE addition contributes to the improvement of the machinability of the steels. In the present paper, machining characteristics of austenitic stainless steels without lead addition were investigated by adding free-machining elements, such as sulfur, REE and bismuth. The results have shown that large numbers of rounded, globular shaped inclusions were obtained for both steels. The machinability of steel B is better than that of steel A, and the cutting forces of steel B are lower than those of steel A at various cutting speeds. Lead can be substituted by REE and bismuth in free machinable austenitic stainless steels. REE significantly affects machining characteristics of austenitic stainless steels without lead addition. The mechanical properties of both steels were similar, and their fracture exhibited ductile characteristics. Satisfactory machinability and mechanical properties can be obtained for both steels.