bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimal Design of Bone Plate System Using Finite Element Method
Authors: Cho Ji Hyun , Song Byeong Uk , Seo Keum Hee , Min Kyung Tak , Seo Tae Il
Published: January 2012

This paper investigates a design optimization for "Bone Plate System" which can directly fix human bones fractured. The active trauma system consists of several shaped bone plates and implant screws for fixation of fractured human bones with various manual instruments allowing to handle them. The material corresponds to titanium because it was well known as harmless material when being inserted into human body. This system has to be suitably rigid as well as manually bended in orthopedic surgery operations. Then bone plates have to be designed with suitable shapes. In order to verify whether bone plates were well designed, a series of bending tests. However optimized shapes of bone plates have to be determined before unnecessary a number of bending tests. For this purpose FEM(Finite Elements Method) was applied during design process which allows us to investigate the bending strengths of bone plates. Based on FEM results, dimensions of bone plates were optimized in order to be suitably rigid without actual bending tests.
Thermo-Structural Coupled Topology Optimization of Micro-Capacitive Accelerometer
Authors: Chen Huan Yuan , Xie Yong Jun , Yan Dong Song , Liu Hao , Li Jing Ming
Published: January 2012

In order to enhance the working performance of micro-capacitive accelerometer in high temperature environment, the structure topology optimization of a micro-capacitive accelerometer is proposed. After the study of thermo-structural coupled governing equations and sensitivity analysis, the mass-block and elastic-beam structure of comb micro-capacitive accelerometer topology optimization model is established. Then the optimal topology forms of mass-block and elastic-beam structure are obtained with the MMA (method of moving asymptotes) method. At last, the calculating results indicate that the maximum deformation at acceleration detection direction is only 22nm at the operating temperature range of 0~300°C, which less than the maximum deformation of the limit value (25nm), and provides a reliable way for innovative design of micro-capacitive accelerometer.
Systematic Direct Solid Modeling Approach for Surface Micromachined MEMS
Authors: Li Jian Hua , Liu Yu Sheng , Ling Hao , Guo Wei Bin , He Gao Qi
Published: January 2012

Current MEMS design methods do not fulfill the needs of emerging complex MEMS devices. In this paper, a systematic direct solid modeling approach for surface micromachined MEMS design is proposed. In this approach, practical model of a surface micromachined MEMS device, designed in a traditional CAD environment, is simplified firstly; after simplification, masks and process sequences are generated through solid-based mask synthesis; then local variation is used to refining the 3D layer model; finally masks and process sequences are verified in rough simulation and accurate simulation. The approach aims at enabling designers to focus on creative design activity in an intuitive mode.
Computer Aided Understanding for Interaction between Stratified Slope and Bolt
Authors: Zhou Lian Jun , Li Xiao Min
Published: January 2012

Slope excavations are often constructed in stratified host rock masses in practice. The stratification in a rock mass is generally characterised by its planar geometry and persistence. The mechanical properties of the joints dictate both the deformation and strength characteristics of the stratified rock mass. Thus, it is imperative that the influence of the joints be incorporated in any type of load-deformation analysis of slope excavations in layered rock masses. Rock bolts have been widely used as the primary support system to stabilize the rock masses of slope. In general, rock bolts reinforce rock masses through restraining the deformation within rock masses and reduces the yield region around the excavation boundary. In order to improve bolting design, it is necessary to have a good understanding of the behaviour of rock bolts in deformed rock masses. In the present paper, the numerical analysis method is adopted to built the three springs bolt element; then the excavation in the stratified rock slope is simulated to improve the understanding of the slope deformation and bolt mechanical characteristic.
Geometry Information Extraction from the STEP Neutral File
Authors: Pan Hai Peng , Feng Hao
Published: January 2012

It is one of the key technologies for the integration of CAD/CAM/CAPP to extract the geometric model information. Based on a systematic analysis and comprehension on the expression of STEP geometry model, the map between EXPRESS and C++ was studied. The module of map has been developed as a dynamic link library, which facilitated the expansion of system. In order to ensure the coherence and availability of collected data, a module for data acquisition has also been designed. The reading and analysis for STEP neutral file has been realized so that the geometry information in the STEP-based three-dimensional model could be extracted. Application illustration, which is used for supporting the slicing process in rapid prototyping, has been also presented. The method put forward in the paper is conducive to the integration of different CAX systems.
Design for Green Cost of New Type Endless Rope Winch Based on LCC
Authors: Wang Xiao Hua , Wang Jian Wu , Li Bing Wen , Tang Bao
Published: January 2012

Based on Life Cycle Cost Analysis for Endless Rope Winch, this paper introduces the new design concept-Design For Green Cost (DFGC), and describes the specific design and methods of Endless Rope Winch in saving energy, reducing cost and other aspects, so as to improve efficiency and the green degree of winches by the greatest extent
The Enterprise Performance Management System for Mining Enterprises
Authors: Ming Jian , Hu Nai Lian
Published: January 2012

This paper, guided by market demand, puts forward the mining enterprise performance management system for the purpose of enhancing the competitiveness of the enterprise. According to the scarcity of the mineral resource, the system improves the current situation of the separations of the operations management and the performance management. The system associates the operations plan, the budget plan and the performance management, integrating the strategic process and the operations process, which constructs the core of the enterprise executive ability. The system continuously improves the level of the business operations management and meets the requirements of the enterprise strategic management and of rational exploitation and utilization of the mineral resource, supporting mining enterprises to make decisions on the business strategy.
Design of Basis Weight Instrument Based on Wireless Transmission Technology
Authors: Wang Shu Guang , Zhao Yong
Published: January 2012

Design a kind of basis weight instrument based on wireless transmission technology, which adapt to the basis weight measurement and control system. Show the hardware and software structure. It uses C8051F353 as MCU, and uses CC1100 as wireless communication chip. The instrument can control the scanning bracket to detect paper’s basis weight on line automatically, or remote manual control. It may connect to wireless sensor network, or integrated in DCS. The precision is high to 0.05%. It can be used to detect all kinds of paper and board by using different radiate source.
Graph Applications to Data Structures
Authors: Manjula V.
Published: January 2012

This paper presents a topic on Graph theory and its application to data Structures which I consider basic and useful to students in APPLIED MATHEMATICS and ENGINEERING.This paper gives an elementary introduction of Graph theory and its application to data structures. Elements of Graph theory are indispensable in almost all computer Science areas .It can be used in Some areas such as syntactic analysis, fault detection, diagnosis in computers and minimal path problems. The computer representation and manipulation of graph are also discussed so that certain algorithms can be included .A major theme of this paper is to study Graph theory and its Application to data structures Furthermore I hope the students not only learn the course but also develop their analogy perceive, formulate and to solve mathematical programs Thus Graphs especially trees, binary trees are used widely in the representation of data structures this course one can develop mathematical maturity, ability to understand and create mathematical argumentsMethod of derivation is procedure given in the text books with necessary formulae and their application . Concepts and notations from discrete mathematics are useful in studying and describing objects and problems in branches of computer science, such as computer algorithms, programming languages.
Electrical Defect Detection in Thermal Image
Authors: Haidar Ahmed M. A. , Asiegbu Geoffrey O. , Hawari Kamarul , Ibrahim Faisal A. F.
Published: January 2012

Electrical and Electronic objects, which have a temperature of operating condition above absolute zero, emit infrared radiation. This radiation can be measured on the infrared spectral band of the electromagnetic spectrum using thermal imaging. Faults on electrical systems are expensive in terms of plant downtime, damage, loss of production or risk from fire. If the threshold temperature is timely detected, the electrical equipment failures can be avoided. This paper presents a straightforward approach for thermal analysis that examines power loads and large area thermal characteristics. A thermal imaging camera was used to collect thermal pictures of the tested system under various operating conditions. These pictures are analyzed using thermal diagnosis system in order to detect the fault location that may occur and improve inspection efficiency.
The Application of the Internet of Things in the Smart Grid
Authors: Zou Qiao Ming , Qin Li Jun , Ma Qi Yan
Published: January 2012

The application and development of the Internet of Things have close relationship with the construction of smart grid. Generally, each of electrical equipment can be connected together by wireless communication technology and sensing technology in the Internet of Things to make the smart grid become a real-time interactive electrical network. This paper summarizes the development situation, analyzes its structure and characteristics and introduces the key technologies supporting the application of the Internet of Things. In view of the functions and features of the Internet of Things and the development requirements of smart grid, it analyzes the specific application scope and level of the Internet of Things in the smart grid. It makes some concrete analysis and discussion about the application of the Internet of Things in the asset management and remote automatic reading meter system of smart grid and summaries and prospects the application situation of the Internet of Things in the smart grid
SOADL-EH: Service-Oriented Architecture Description Language Supporting Exception Handling
Authors: Wang Quan Yu , Ying Shi , Jia Xiang Yang , Lv Guo Bin , Shuai Yun
Published: January 2012

To solve the problem of the construction of service-oriented software architecture with fault tolerant, the paper proposes SOADL-EH, a novel service-oriented software architecture description language supporting exception handling. With the capability of modeling normal SOA and the provision of software architecture elements such as exception handling services, exception handling connectors and exception handling configurations, etc., this language can separate clearly the exception handling logic from the normal business logic of the service-oriented software architecture layer, which makes up the shortage in exception handling capability of the existing Architecture description language.
A Spread-Out Design for Dual-Band GPS Microstrip Antenna
Authors: Zhao Xin , Miao Jun Gang , Jiang Jing Shan
Published: January 2012

This paper propose a new design of dual-band GPS microstrip antenna by spreading out the patches on the ground plane. With two independent patches, the antenna operates at two frequencies, which are available in different GPS systems. When patches are spread on the ground plane, the beam of radiation pattern shifts away and axial ratio degrades. In this design, two patches are printed on two independent substrates with a compact design, and positions of two antennas are optimized. Finally, above problems are solved with a conductive vaulted base. The design procedure is discussed, and optimized results are presented.
The Application of Fuzzy C Mean Clustering Algorithm on Image Processing Based on .NET Component
Authors: Lai Yue Shen , Ma Tian Ming , Tian Jun Wei
Published: January 2012

Using mixed programming of MATLAB.NET component and C# with the fuzzy C means clustering algorithm in image processing. Create MWArray Interface, full use of C# programming interface of the good and citing MATLAB generated dynamic link library (dll). The image processing operations through the dll into the FCM segmentation function of the MATLAB, and return threshold value. Finally, complete segmentation of gray image. Experimental results show that this method keeps the same segment effect as that the traditional FCM has. Using C # reference MATLAB Program, simple software interface programming, enhanced security, and expanded scope of use.
Research on the Switch Scheduling Algorithm of Networked Control System
Authors: Cui Qing Quan , Wang Ya Hui , Wei Dong , Zhang Shao Jun
Published: January 2012

Networked Control System is the focus of current research in control field, and the use of a shared network introduces new challenges, therefore, it is significant to research scheduling algorithms for improving the control and schedule performance of NCS. In the paper, according to the challenges existing in scheduling algorithms, a new scheduling algorithm called Switch scheduling is proposed, and the calculation method of switching conditions is also given. In the proposed algorithm, network-induced delay and network utilization are considered to satisfy the different network condition with appropriate scheduling algorithm. The proposed algorithm improves the network utilization and the efficiency of data transmission, and guarantees the system stability. Finally, a simulation example is conducted to validate the feasibility and superiority of the proposed switch scheduling.
Segmenting Lung Fields in CT Image Using Legendre Moments and Active Contour
Authors: Lai Jun , Xu Ke
Published: January 2012

Conventional methods that perform lung segment -ation in CT slices rely on a large contrast in hounsfield units between the lung and surrounding tissues. However, the lung fields are affected by high density pathologies, and they are discontinuities in the pixel intensities, the traditional segment- ation methods can’t get the good results. Here, we present a new segmentation method of the active contour, which is constraining with respect to a set of fixed reference shapes of lung fields. This approach is based on the shapes descriptors by the legendre moments computed from the shape regions, and it can be used in some complex lung field segmentation, especially suitable for the segmentation of lung field with the juxta-pleural pulmonary nodules. Experiments illustrate that the proposed method is able to segment the lung fields in the CT images successfully.
Study of Off-Line Handwritten Chinese Character Recognition Based on Dynamic Pruned Binary Tree SVMs
Authors: Zhu Cheng Hui , Xu Xiao Li , Wang Jian Ping , Xu Xiao Bing
Published: January 2012

The Chinese off-line handwritten recognition is a multi-class classification problem. Since there exits certain relation between some classes, it is unnecessary to differentiate all types of the Chinese characters at the time of identifying one type of Chinese character. In this paper, an improved dynamic pruned binary tree SVM multi-classification algorithm is presents. Unvalued support vector is removed at each identification, then a new binary tree is reconstructed according to the features of the structure of the Chinese character, The number of the support vector machines is reduced and the identification speed is increased. Compared with different multi-class classification algorithms, the simulation results show that the method can improve the speed of identifying the classes of the Chinese characters. It is effective and accuracy high.
Security Analysis of Proxy Mobile IPv6 Authentication Protocol with IPv4 Support
Authors: Tie Ling , He Di
Published: January 2012

Proxy mobile ipv6 protocol is a mandatory protocol to support inter-working among heterogeneous mobile broadband networks. In order to support compatibility to IPv4 network, a mobility infrastructure in the proxy mobile ipv6 that provide ipv4 extension is presented in this article. An authentication protocol based on authentication option is proposed to protect this proxy mobile IPv6 protocol with IPv4 support. A SVO formal Analysis method is used to prove the security of this protocol.
Design and Realization of High Speed Data Transmission Based on PCI Bus of DM642
Authors: Zhang Bao Feng , Chang Xiao Kun
Published: January 2012

For realizing data acquisition and transmission based on PCI bus, a device driver was designed for data acquisition card, which use TMS320DM642 of TI and it’s PCI interface as transfer protocol. And in this development, we use VC++6.0, DDK and DriverStudio3.2 to develop the PCI bus driver for Windows XP, and realizing DMA high-speed data transfer method between data acquisition card and computer RAM.
The Design of a 150V/50Hz High-Quality Single-Phase Inverter Based on TMS320LF2407A
Authors: Wang Zhen , Liu Ling Shun
Published: January 2012

According to the requirement of a missile’s power supply, a 150V/50Hz high-quality single-phase inverter has been developed, and the CPU is TMS320LF2407A, and the main circuit is full-bridge inverter intelligent power module (IPM), and SPWM control method has been used too. The stability and the accuracy of the output voltage of this power supply have been improved because of the use of the digital PID regulator. The results of experiments show that the power supply has the advantages of the simple-circuit, the high-quality output-waveform, the high-stability output-voltage and so on.
Adaptive Variable Structure Control for Uncertain Linear Time-Invariant Delay Singular Systems
Authors: Meng Bo , Gao Cun Chen , Tang Shu Hong
Published: January 2012

This paper discusses the control problems of singular linear time-invariant delay systems with uncertainties. A new adaptive variable structure control strategy is given by Lyapunov stability theory. The invariance of sliding mode is proved in the circumstances of the external disturbance and parameter perturbation with matching conditions. Through memory and memoryless of the linear state feedback, the control strategy ensure that system reaches sliding mode in finite time and the closed-loop system is global asymptotic stable. Simulation results further show that the strategy is feasible and effective.
Research and Simulation on the Algorithm of Guided Projectile Strapdown Inertial Navigation System
Authors: Tian Jian Hui , Zhao Jia Sheng , Cao Yan , Wang Wei , Xu Wei , Mu Sheng
Published: January 2012

To improve the hit probability and damage probability of guided projectile, made the strapdown inertial navigation technology better application in guided projectile, based on the feature of short range and short flying time of guided projectile, a simplification model of SINS (strapdown inertial navigation system) was proposed. The optimal 3-subsample rotation vector simulation platform was founded based on the tradition method, and this system was also checked by simulation using three-channel databases from simulator testing. The results show that this system not only can satisfy the requirement of real-time and precision, but also can improve the relative error to 10-6. The influence of direction draft to the guided projectile is also reduced.
Design of the UHF RFID Passive Tag Vibration Measurement Instrument
Authors: Ma Zhen Zhou , Yu Sheng Kun , Liu Hong , Hu Sha , Fu Yang
Published: January 2012

According to the anti-vibration performance test requirements to the UHF RFID passive tag in the application of civil aviation luggage transport, the paper designs a vibration measurement instrument for UHF RFID passive tag. A vibration test scheme is designed based on non-resonance single-axis inertial vibration principle, which builds the mathematical model and vibration equation. Thereafter, a software ADAMS is applied to simulate the vibration performance, and the effects of motor speed, eccentric quality and spring stiffness coefficient are analyzed to provide the basis for the further manufacturing. Finally, a prototype is realized, and a vibration performance test based on piezoelectric accelerometer is proposed to obtain the performance parameters. The test shows that the parameters including vibration frequency and the maximum peak to peak vibration displacement satisfy the design requirements.
Motion Path Editing Based on Constraint Detection
Authors: Yan Gao , Xu Jian Zhong
Published: January 2012

This paper introduces a method for interactive direct manipulation of motion capture animation, which allows a user to alter positional properties of a motion and preserves the motions’ quality. The algorithm contains three stages: motion analysis, motion path editing, and constraint reconstruction. Our experiments show that by using the algorithm human motion can be transformed successfully from the old path to the new path.
Monitoring System of Weighing Fruit Grader Based on Labwindows/CVI
Authors: Jiang Jun Sheng , Song Jian , Sun Xue Yan
Published: January 2012

For the sake of overcoming the shortcoming of the manual sorting fruit such as inefficiency, inconformity and labor intensity, the weighing fruit grader is designed. The machine is composed of mechanism, computer, data acquisition card, DC PWM system, and pressure sensor. In the system, automatic fruit grading is realized according to the weight measured by pressure sensor. Based on the virtual instrument technology, a humanized human-computer interface is designed by means of Labwindows/CVI. Experiments explain that the precision of the fruits sorting is 96% when the velocity of the transport system is 0.5m/s. The system owns high real-time performance and dependability and it has a good application prospect.
The Design of Image Compression with BP Neural Network Based on the Dynamic Adjusting Hidden Layer Nodes
Authors: Li Jing , Wu Xin Hui , Qin Chang Hai , Zhao Jing
Published: January 2012

Aiming at the image compression algorithms with the used BP neural network ,they have inherent defects of poor universality and long training time, a model of the dynamic adjusting hidden layer nodes of BP neural network is designed. According to the training image, using the correlation coefficient and dispersion degree of the same hidden layer’s nodes, we cut and delete some no nodes, this algorithm not only can improve learning speed effectively but also has certain generalization ability, and can complete the task of no- training images compression through experiments.
Study on Assessment Model of Lightning Proof Abilities of HV Transmission Line Based on ArcGIS
Authors: Lai Guo Fang , Ji Yan Fei , Gu Zhi Peng , Liu Gang
Published: January 2012

With the rapid growth of the national economy, the demand for electricity is increasing rapidly. In order to ensure electric power system operates safely and stably, much attention has been paid to insulation condition and lightning proof abilities of HV transmission lines. Nowadays the study of lightning protection of transmission line, which takes districts as the research object, has certain limitations. To provide a more rational basis for insulation design of the new transmission lines as well as insulation improvement in the old, this paper brings in a new analysis method based on ArcGIS. It is also taking the environmental factors, such as landscape along the transmission lines, into consideration. This method first filters and statistically analyzes lightning location data, and establishes assessment model of lightning proof abilities of transmission lines, which can serve as reference for finding the segment struck by lightning. In order to verify the feasibility of the model, this paper took a 220kV transmission line of a region in the Pearl River Delta as an example, and analyzed the distribution of parameters of lightning activities for the past decade. The result shows that the segments where flashover trip occurred have great relevance with the results of the data analysis. It is true that the model can be provided as a reference to the improvement of the insulation level of lines.
The Voltage Output Characteristics of New 24-Pulse Rectification System under Unbalanced Source Voltage
Authors: Ma Xi Geng , Xu Jun Tao , Lu Mao Zeng
Published: January 2012

The traditional 6-pulse high-power rectifier has defects such as large harmonic content and low power factor in application. The 24-pulse rectification system based on autotransformer can restrain the harmonics and improve power factor effectively. This paper derivate the input current and output voltage’s characteristics of 24-pulse rectification system under balanced grid. At the same time, the author simulate and analysis various impacts of different situations of unbalanced grid on these two characteristics on the basic of real grid ,which has an important guiding significance on the application of the 24-pulse rectification system.
An Improved Channel Estimation Method for LTE Uplink
Authors: Zeng Zhao Hua , Xue Li Jun , Zhao Qian
Published: January 2012

As users of the increasing demand for multimedia services, 3GPP long term evolution system proposed the Long Term Evolution, LTE. LTE is the most important improvements with a new air interface technology to provide users with higher peak rates. Accurate channel estimation is to ensure the transmission quality of LTE system and the key to its advantages. In pursuit of lower bit error rate (BER), this paper based on pilot signals TDD LTE system on the uplink channel estimation algorithm. Use LS algorithm, MMSE algorithm and svd algorithm. Based on these three improved svd algorithm, it gave the simulation results.
Consumers Energy Efficiency Practices
Authors: Kabalan A.
Published: January 2012

This paper aims to give the consumer a list of energy saving practices in order to reduce the usage of energy in residential and commercial buildings. Such practices are crucial to any residential or commercial setting before embarking on installing renewable energy systems such as solar power systems. Those methods are relatively cheap to implement and has the potential to provide energy savings up to 30 %.
Intelligent Universal Transformers Online Adaptive Control via Artificial Neural Network
Authors: Sadeghi Maryam , Gholami Majid
Published: January 2012

Adaptive control is a novel methodology introducing for dynamic identification and control of nonlinear system in case of unknown parameters and absence of precise mathematical model. The Artificial Neural Networks (ANNs) suggest the parallel algorithm in resolving paradigms and result on a robust control fashion in which learning algorithm resembling to the biological brain. Back propagation algorithm is proposed for updating the ANN weighting factors through the on line learning procedure. This research is carry out to investigate the ANN trained algorithm to elaborate the switching angle signals for controlling the Intelligent Universal transformer (IUT) in input and output stages. IUT motive the Advanced Distribution Automation (ADA) with the new invention in automation, management and control. ANN online adaptive scheme is developed for controlling the input current and output voltages of IUT with the major benefits and service option advantages, comprising from a voltage regulation in real time operation, capability on providing three phase power outputs in case of one phase input, energy storage capability,48V DC output option, harmonic Filtering, reliable divers power 240V AC 400HZ for communication usage together with two 240 V AC 60 HZ outputs, automatic sag correction, dynamic system monitoring and system robustness in term of input and load disturbances.
Importance of Holidays for Short Term Load Forecasting Using Adaptive Neural Fuzzy Inference System
Authors: Akdemir Bayram , Çetinkaya Nurettin
Published: January 2012

In distributing systems, load forecasting is one of the major management problems to carry on energy flowing; protect the systems, and economic management. In order to manage the system, next step of the load characteristics must be inform from historical data sets. For the forecasting, not only historical parameters are used but also external parameters such as weather conditions, seasons and populations and etc. have much importance to forecast the next behavior of the load characteristic. Holidays and week days have different affects on energy consumption in any country. In this study, target is to forecast the peak energy level the next an hour and to compare affects of week days and holidays on peak energy needs. Energy consumption data sets have nonlinear characteristics and it is not easy to fit any curve due to its nonlinearity and lots of parameters. In order to forecast peak energy level, Adaptive neural fuzzy inference system is used for hourly affects of holidays and week days on peak energy level is argued. The obtained values from output of the artificial intelligence are evaluated two fold cross validation and mean absolute percentage error. The obtained two fold cross validation error as mean absolute percentage error is 3.51 and included holidays data set has more accuracy than the data set without holiday. Total success increased 2.4%.
Parameter Determination for Back-to-Back Converters in Power Systems to Enhance Interface Flow Margins
Authors: Ohn Sung Min , Song Hwa Chang , Jang Byong Hoon
Published: January 2012

This paper presents a method to determine parameters of BTB (back-to-back) converters in terms of the enhancement of interface flow margins. Interface flow margin is by definition a measure of how much active power can be transferred from the external areas to the study area with the fixed load demand, and it is mainly constrained by system voltage stability. BTB converters are controllable equipments with the active power flow through them, and its DC link in fact can divide the AC systems at the location and hence can reduce the fault current level. This paper first calculates margin enhancement sensitivities at the nose point of F-V curves and formulates an optimization problem to update the BTB parameters to improve the margins. This procedure is repeated performed until the required margin enhancement is achieved.
Survey of Harmonic Profile on Electrical Distribution Network in Indonesia
Authors: Mawardi A. , Pranyoto Pranyoto , Sunarto D. , Firmansyah M. , Habibie A.S.
Published: January 2012

Profile of harmonic current condition required for power system distribution planning and harmonic management, different type of load emit different profile of harmonic, not only spectrum and amplitude but also time of event. These paper present surveys of current condition level of harmonic emission at different Voltage point of common coupling (PCC) and costumers type. Measurement located on PLN West Java distribution area.
Analysis of Casing Strength of Fracturing Sand Control in Deep Well Based on CAE Simulation Technology
Authors: Wang Wei Zhang , Yan Xiang Zhen
Published: January 2012

It used to be held that fracturing sand control construction would severely affect the strength and duration of casing in deep well. Based on 5 inch and 7inch casings, the article intends to conduct modeling and analysis, by means of the finite element method, of a multi-tube model of casing of different steel grades and a combination of different perforation parameters, under different environmental conditions (different internal and external pressure). The results show that under the same perforation parameters, the equivalent stress within the casing increases with the external pressure and the changes linearly. Equivalent stress within the casing decreases drastically with the increase of internal pressure. When the internal pressure is greater than the external pressure, the equivalent stress of the casing tends to slow down. Stress condition in the casing perforation improves when internal pressure is applied in the casing. The result shows that fracturing sand control construction improves the stress condition of the casing rather than affect the strength and duration of casing.
Autonomous Aerial Refueling for UAVs Based on GPS/MV
Authors: Wang Long , Dong Xin Min , Guo Jun , Jia Hai Yan
Published: January 2012

According to the UAV autonomous aerial refueling based on GPS/Machine Vision integration, the restrictions on the sensors during docking are analyzed. An adaptive Federal Kalman Filter (AFKF) is proposed, which is based on extended Kalman filter arithmetic, after modeling the sensors measurement models. Reference trajectory of docking is planed using cubic interpolators and docking control laws are designed with LQR. Simulation results show that the controller ensure the stabilized tracking and docking, and the AFKF outputs is continuous and stabilized during sensor failure comparing to centralize Kalman filter.
Robust Stability and Stabilization of Deterministic Networked Control Systems
Authors: Wang Yan Ping , Zhu Qi Xin
Published: January 2012

Feedback control systems wherein the control loops are closed through a real-time network are called networked control systems. Under some special conditions proposed in literature, the networked control systems with stochastic time delay can be transformed a deterministic system with a constant delay. Based on linear time invariant discrete time process, the robust stability of deterministic networked control systems is analyzed and the designing method of robust state feedback controller for deterministic networked control systems is proposed in this paper for the first time. An example is given to verify the theory results of this paper.
Optimization of Kernel Function Parameters SVM Based on the GA
Authors: Zhang Jian Hua
Published: January 2012

That Support Vector Machines applies to image recognition have good results，But the kernel function C and parameters of the SVM which influence the result and performance has not been decided. Against this question, this paper bring forward a new algorithm that combines SVM with GA to classify and uses GA to select excellent kernel function, the results of experiment show Image Recognition based on SVM and GA are effective.
Research on Technology of the Global Geographic Data Sets Generation Based on the Original Remote Sensing Data
Authors: Feng Wen Quan , Zhou Gan , Fang Yong
Published: January 2012

To meet the simulation and testing requirements of HY-1 Satellite ground operation control system simulation subsystem, a global geographic data sets based on original remote sensing data was proposed. This paper detailed the function and data processing methods of the data sets, mainly including data structure and the key algorithm of the satellite calibration and data filling required in the data sets generation process. At last, using the data simulation function of ground station, the generated raw data would be sent to real ground operation control system, and the processed images showing the data sets were filled with good results
Seismic Wavelet Estimation Using High-Order Statistics and Chaos-Genetic Algorithm
Authors: Sun Hong Tao , Dai Yong Shou , Wang Fang , Peng Xing
Published: January 2012

Accurate and effective seismic wavelet estimation has an extreme significance in the seismic data processing of high resolution, high signal-to-noise ratio and high fidelity. The emerging non-liner optimization methods enhance the applied potential for the statistical method of seismic wavelet extraction. Because non-liner optimization algorithms in the seismic wavelet estimation have the defects of low computational efficiency and low precision, Chaos-Genetic Algorithm (CGA) based on the cat mapping is proposed which is applied in the multi-dimensional and multi-modal non-linear optimization. The performance of CGA is firstly verified by four test functions, and then applied to the seismic wavelet estimation. Theoretical analysis and numerical simulation demonstrate that CGA has better convergence speed and convergence performance.
PID Controller Parameters Identification Based on Data Model
Authors: Meng Qing Bo , Yin Yi Xin , Qiao Gui Ling
Published: January 2012

To tune PID controller’s parameters, the algorithm based on the Data-Model of Controlled plant is presented. With input and output data, Data Model as well as the feature data of controlled plant is identified by the Convolution Equation, and then the fastest control signal referenced to ideal fastest response is calculated according to the constraint condition of control signal. Finally, the closed loop control system of the controlled plant is designed, and the PID parameters are identified by the Least-Squares-Method (LSM) with the data of the fastest control signal.
The Improvements of the Nonsingular H-Matrix Determination
Authors: Yue Rong , Yin Ping
Published: January 2012

This paper improves the main results in an article named "A note of partial double diagonal-dominant matrix ", and puts forward a new determination method of H-matrix.
The Measurement of Software Aging Damage and Rejuvenation Strategy for Discrete Web Services
Authors: Guo Jun , Song Xin Ya , Wang Yun Sheng , Zhang Bin , Li Xian Li
Published: January 2012

the problem of software aging widely exists in long-running software system, and the solution is software rejuvenation. Traditional software rejuvenation strategy has some deficiencies in solving the problems of discrete web services aging, for example, the higher failure rate and the poorer stability. Therefore, considering the discrete web services has the loose coupling characteristic, we establish and revise the discrete web service aging damage model by using multiple linear regression method to calculate the aging damage of an individual web service. On this basis, based on the web service priority, call frequency and aging condition, we propose an adaptive rejuvenation strategy which ensures the key web services’ quality. The experiment result shows that, compared with traditional rejuvenation strategy, this strategy improves the stability and dependability of the web services.
Research on the On-Line Optimal Degree Evaluation System Based on Extensics Theory
Authors: Zhong Liang Wei , Xia Zheng Xing , Ni Jing
Published: January 2012

A new evaluation system based on the optimal degree evaluation method and combined with the comprehensive optimal degree evaluation method and the extensible optimal degree evaluation method is put forward in this paper, as an effective means in conducting the comprehensive multi-expert optimal degree evaluation to eliminate the convergences or conflicts that may occur in other evaluation methods while choosing measurement conditions. Meanwhile, the on-line optimal degree evaluation system developed on this theory is discussed in this paper too and proves its correctness by an application example of vertical machining centers.
SFGPR RFI Suppression Using Wavelet Packet Selective Algorithm
Authors: Wang Lei , Wang Tao , Peng Qian , Li Wei , Zhou Yin , Hao Qiang
Published: January 2012

This paper presents a wavelet packet selective algorithm to suppress the radio frequency interference (RFI) in the step-frequency ground-penetrating radar (SFGPR). Based on the property and the form of RFI in the frequency domain of radar echo, the methods of RFI suppression are studied, and the new algorithm is proposed. Using the new algorithm to suppress the RFI in experimental GPR data, the result of the experimentation shows that the algorithm can effectively suppress the RFI in SFGPR. Finally, the performance of the algorithm is analyzed and evaluated. Compared with the median filter algorithm, the ability of the new algorithm to suppress the RFI is significantly improved.
The Structure Principle of Knowledge Mesh and its Application
Authors: Yang Ren Zi , Yan Hong Sen
Published: January 2012

Aiming at the rationality of new knowledge mesh, which is obtained from the self-reconfiguration of knowledgeable manufacturing systems, the inherent structure principle of the knowledge mesh is studied. Firstly, the sets of the knowledge points are classified by the equivalent relations, and the function topological space is constructed. The relationships between the sets of the knowledge points and the function topological space are established by the real set. In the function topological space, the conclusions of the base are given, which show the essential mapping relationships of the knowledge mesh, the topological space and the base. After knowing the principle, the structure of the knowledge mesh is reduced by using the equivalent relations, the base and the basic knowledge points. The completeness of the complex relationships in the knowledge mesh is studied by the transitive closure. These conclusions can reduce the structure and enhance the rationality of the knowledge mesh. Finally the given example shows that these theories are effective.
The Study of Wind Farm’s Equivalence Method and Verification
Authors: Lin Hong , Chao Qin
Published: January 2012

When the scale of wind farm is increased quickly, if not considering the impedance of the collection system within wind farm, the bigger error in power flow calculation may be caused. In this paper a simple equivalence method calculating the collector system equivalence impedance by using the equivalence power loss is proposed and wind farm’s equivalence output power model considering wake effect and wind speed is established. The models are applied in power flow calculation of the natural wind farm connected to Urumqi grid, Xinjiang. The results compared with original system power flow show that this method has lower error. By using the losses in the collector system, the method of computing the equivalence impedance is verified in this paper. The equivalence impedance of collector system is calculated from total active power loss and total reactive power loss and current flow of the collector system. The error analysis showed that the equivalence impedance of collector system has lower error. The test results show that the proposed equivalence method is effective and logical and has a certain practicality. The reference is given for farther studying safety and stability operation of electric power system including wind farm.
A Fast Algorithm for Vector ARMA Parameter Estimation
Authors: Chen Zhi Qing , Xia You Shen
Published: January 2012

In this paper, a fast algorithm for vector autoregressivemoving-average (ARMA) parameter estimation under noise environments is proposed. Based on an equivalent AR parameter model technique and a Yule-Walker equation technique, solving the parameter estimation problem of the VARMA model is well converted into solving linear equations. Therefore, the proposed algorithm has a lower computational complexity and a faster speed than conventional algorithms. Application examples with application to Lorenz systems confirm that the proposed algorithm can obtain a good solution.
Hybrid Behavior Ant Colony Algorithm
Authors: Wei Xian Min
Published: January 2012

In basic ant colony algorithm optimization process, for the ant colony algorithm in speeding up the convergence rate and avoiding stagnation, ant colony algorithm based on hybrid behavior is studied in this paper. By the ant behavior definition and implementation of the algorithm, the instance confirms that the ant colony algorithm based on hybrid behavior has a more stable solving performance than the basic ant colony algorithm.
Fast Passive Synthetic Array Parameter Estimation by Ant Colony Optimization
Authors: Zou Da Yong , Hou Yun Shan
Published: January 2012

The Maximum Likelihood(ML) estimator for passive synthetic arrays incurs heavy computation when search for signal azimuth and frequency at the same time. To reduce its computational complexity, we introduced Ant Colony Optimization(ACO) to work with it. A new kind of ACO technique for continuous domain featured by Gauss kernel function is used to sample the ML spectrum, which is regarded as the fitness function in the process. The resulted estimator is called Ant Colony Optimization based ML (ACO-ML). Simulations show that ACO-ML not only reduces the computational complexity greatly but also maintains the excellent performance of the original ML estimator.
Development of Network Driver Program Based on pxa270 and Embedded Linux
Authors: Kang Hong Yan
Published: January 2012

A research about the development of network driver program based on pxa270 is done. Implementation principle and running process of network driver based on embedded Linux is introduced. Through the example of LAN91C111 driver that is done in embedded Linux operating system, development process of network driver based on Linux operating system is analyzed.
Design and Realization of Telephone Voice System Based on D081A Voice Board
Authors: Xu Yao Zhong , Wang Qing Xian , Kong Chuan , Fu Hong Guang
Published: January 2012

CTI is a new technology combines communication technology with Internet. The Telephone Voice System is typical application of CTI. This paper presents the design and realization of a Telephone Voice System, utilizing D081A voice boards of DongJin Company. System structure, module di-vision and realization procedures are demonstrated. The system code is compiled with VC++, and database adopts SQLite. The system realizes recording, playback and other basic functions, and network calls function is extended. Users can operate the system with telephone, which is simple and convenient.
A Reversible Data Hiding for JPEG Images
Authors: Liao Gui Long , Zhang Xin Peng
Published: January 2012

A novel reversible data hiding technique for JPEG images is proposed in this paper. Consecutive zeros in the tail of DCT coefficient sequence in each block are exploited to embed a number of secret bits by modifying only one coefficient. Thanks to the efficient data embedding in the DCT coefficients, the proposed scheme can provide a good rate-distortion performance. Also, when having an image containing secret data, one can perfectly recover the original image after extracting the embedded data. Experimental results show that the proposed scheme outperforms the previous method.
Drag Reduction of Gas-Liquid Two-Phase Flow in Steel Pipes with Different Inclination Geometry
Authors: Liu Lei , Guo Xin Feng , Guo Qiu Yue , Fan Hui Qing , Zhong Zhu Hai
Published: January 2012

It is significant to make researches on drag reduction in two-phase transport pipeline because two-phase flow has high energy dissipation. API X 52 steel pipe with diameter of 40mm is used in this paper to simulate pipeline with different inclination geometry including horizontal, up-inclined and vertical sections. The up-inclined section has an inclination angle of eight degree. Experiments and theoretical analysis are carried out to study the drag reduction characteristics of gas-liquid two-phase flow in these three sections. The drag reducing agents used here is polyacrylamide. It is found that two-phase drag reduction varies with pipe inclination geometry. The largest drag reduction efficiency occurs in horizontal pipes and which is up to seventy percent. Drag reduction efficiency in up-inclined section is up to sixty percent. Drag reduction in vertical section is the lowest and which can be up to about thirty percent. A mechanistic drag reduction model is proposed to predict drag reduction in gas-liquid two-phase flow. The results predicted are in good agreement with the experiment data.