bluuebunny/crossref_metadata_2025 huggingface dataset:
Synthesis and Humidity Controlling Behaviors of Kaolinite/Polyacrylic Acid Composite
Authors: Wang Ji Hui , Sun Hong Ye , Ren Shu Ping
Published: January 2012

Kaolinite/polyacrylic acid composite was synthesized by using inverse suspend polymerization method, and the surface morphology, structure and humidity controlling behaviors of kaolinite/polyacrylic acid composite under different kaolinite content, neutralization degree and crosslinker concentration were analyzed and determined. The results show that kaolinite/ polyacrylic acid composite has a loose and porous surface. With the increasing of kaolinite content in composite, the humidity absorption and desorption ratio under the balance of reduction of moisture absorption component and raising of surface porosity increases firstly and then decreases. The humidity controlling behaviors of composite also rise initially with the increasing of neutralization degree and crosslinker concentration, and then drop down. The optimum preparation parameters are kaolinite content of 10%, neutralization degree of 80% and crosslinker concentration of 0.10%.
Developing Adaptive Neuro-Fuzzy Inference System for Controlling the Intelligent Universal Transformers in ADA
Authors: Sadeghi Maryam , Gholami Majid
Published: January 2012

This approach is carry out for developing the Adaptive Neuro-Fuzzy Inference System (ANFIS) for controlling the forthcoming Intelligent Universal Transformer (IUT) in regard of voltages and current control in both input and output stages which is optimized by particle swarm optimization. Current or voltages errors and their time derivative have been considered as the inputs of Nero Fuzzy controller for elaborating the firing angles of converters in IUT basic construction. ANFIS constructed from a fuzzy inference system (FIS) in which the membership function parameters are tuned according to the back propagation algorithm or in conjunction to the least squares method. A neural network maps inputs through input membership functions and associated parameters, and output membership functions and associated parameters to outputs which interprets the input-output map. The associated parameters of membership functions change through the learning algorithm by a gradient vector modeling the input output data in case of given parameters. Optimization method will be investigated to adjust the parameters according to error reduction computed by sum of the squared variation from actual outputs to the desired ones. Advanced Distribution Automation (ADA) is the state of art introducing for tomorrows distribution automation with the new invention in management and control. ADA is equipping by the Intelligent Equipment Devices (IED) in which IUT is a key point introducing as an intelligent transformer subjecting for tomorrows distribution automation in the near future. The proposed ANFIS is a control scheme develop for controlling the IUT by bringing the major advantages like harmonic Filtering, voltage regulation, automatic sag correction, energy storage, 48V DC option, three phase outputs in term of one phase input, reliable divers power as 240V 400HZ for communication utilization and two other 240V 60 HZ outputs, dynamic system monitoring and robustness in major disturbances occurred in terms of input and load variation.
Practical Mitigation of Voltage Sag by Resonant Grounding in Distribution Systems: Case Study of Provincial Electricity Authority
Authors: Songsiri Somchai , Sirisumrannukul Sompon
Published: January 2012

This paper proposes a practical mitigation solution to the voltage sag problem by resonant grounding for a 22-kV distribution system of Provincial Electricity Authority (PEA). The simulation is carried out to investigate the voltage sag impact at the low voltage side of the delta/wye distribution transformer connected at the fault location in the existing solidly grounded system and proposed resonant grounded system by ATP-EMTP simulation. The results indicate that the proposed resonant grounding can help all customers connected at the same bus survive from voltage sag problems and also keep the customers on the faulty feeder connected to the system being continuously supplied. In addition, the distribution system with resonant ground lengthens the useful lifetime of the upstream circuit breaker of the feeder as its number of operations is significantly reduced.
Study of Water Analysis in Reservoir of Small Cities and Towns
Authors: Fu Guo Kai , Hu Yi Yue , Zhang Chi
Published: January 2012

In recent years, problems like pollution to water sources and shortage of water resources are becoming more and more serious in the western region, and both domestic and foreign researchers have carried out lots of research work on the water treatment technology for such micro-polluted water. The article monitors the water quality of a reservoir in Chongqing, analyzes the changes of various water quality indices and reasons of the changes, conducts laboratory beaker coagulation test on water quality of specific stages, and has field pilot test on the raw water treatment. The test results show the best dosing amount of PAC and PAM in different seasons, best agitation force, maximum uprising flow rate, sludge return flow ratio, and optimum coagulant type by comparing PAC and molysite to obtain better water quality.
A Simple Control Strategy to Stabilize an Inverted Pendulum System
Authors: Sun Qian Lai , Sun Zhi Yi
Published: January 2012

A simple control strategy is presented to control An inverted pendulum. The control strategy is obtained via mathematical derivation based on the dynamical model of the inverted pendulum system. That control law is simple and independent of the model of the controlled plant. It is applicable for the multi input single output systems similar to inverted pendulum systems. A controller based on that method was designed to control an inverted pendulum. The structure of the controller is simple. And the parameter adjusting is relatively easy. Then the simulation study was realized. The simulation result shows that control law is valid for the inverted pendulum system.
Research on Real-Time Database of Configuration Software
Authors: Jing Shao Hong , Song Chao
Published: January 2012

This article using three kinds of storage structure combined to store field data, that is memory database, relational database and document management system. This paper also gives the basic realization scheme of real-time database, and using Windows dynamic link library technology and the global shared memory technology to establish real-time database system.
Application of ART-2 Neural Network and Invariant Moment in Image Pattern Recognition
Authors: Hao Lei , Gao Yue Hua , Jia Rui Jun
Published: January 2012

This paper mainly uses image pre-processing and feature extraction to calculate the invariant moment of image, and ultimately realizes the image pattern recognition based on ART-2 neural network. Experimental results show that ART-2 neural network has high recognition rate. It also solves the contradiction between network's plasticity and stability, when new recognition model appears.
Contrast Research of Two Kinds of Integrated Sorting Algorithms
Authors: Li Xiao Bo
Published: January 2012

Boosting and Bagging are two kinds of important voting sorting algorithms. Boosting algorithm can generate multiple classifiers by serialization through adjustment of sample weight; Bagging can generate multiple classifiers by parallelization. Different algorithms are composed of different loss and different integration mode, through integration of Bagging and Boosting algorithm and naïve Bayes algorithm, the Bagging NB and AdaBoost NB algorithms are constructed. Through experiment contrast of UCI data set, the result shows Bagging NB algorithm is relatively stable, it can produce the sorting result superior than that of NB algorithm, AdaBoost NB algorithm is greatly affected by the singular value in data distribution, the result with foundation of NB algorithm is relatively poor on part of data set, and that might have negative influence on the classifier algorithm.
The Application of Remote Monitoring System Based on FPGA in Power System
Authors: Zhu Qi Shen
Published: January 2012

Modbus bus has been widely used in the power system. For the seamless integrated realization of enterprise control and management information, the remote interaction of Modbus bus meter data is needed. This design is based on the problems involved in the process of practical power system application. Using FPGA EP2C35F672 hardware platform, UART, DM9000A external chips are extended to complete remote operation and monitoring of Modbus equipment. The field bus and the Internet network interconnection can be realized, so the decentralization and open for control system are improved. The design can be used to rebuild the existing power field bus network. This design has good prospects and practical value.
Application of Interval Kalman Filtering Algorithm in Integrated Navigation Data Fusion
Authors: Ma Yun Feng
Published: January 2012

The traditional Kalman filter cannot be used directly when some system parameters such as certain elements of the system matrix are not precisely known or gradually change with time. Some uncertain parameters can be described as an interval model. An interval Kalman filtering algorithm is studied in this paper, which can be used to process a system with uncertain parameters. A simple inversion algorithm of interval matrix has been applied and its statistic performances and iterative form are similar to those of traditional Kalman filter. Simulation results show that such filtering algorithm can provide the real time accuracy error estimation and can be applied to such kind of low-cost integrated navigation system.
The Study of the Relation Between Faulty Tolerant Bound and Control Allocation
Authors: Zhang Xiao Jie , Chen You Long , Zhang Xiao Ping
Published: January 2012

Fault tolerant control can improve the safety of aircraft under control surface failures. Sometime the redundancy method losses its effectiveness when the actuator is impaired severely. Under this condition the fault tolerant method can not be used to compensate failures. The paper proposes a method to find the bound by analysis and computer by moment for fault tolerant control. And give the effect on control allocation. At last the fault tolerant bound is added to control allocation as one of limit conditions.
The Research on the Low Clutch’s Noise Detection Technology which Based on the Wavelet Transform
Authors: Chen Yue Dong , Yu Chang Zhong
Published: January 2012

The essay introduce the hardware Design based on the Line detection system, and apply the wavelet analysis theory to the low clutch’s fault signal processing to fulfill the low clutch’s noise detection which based on the wavelet transform. Practice shows that the continuous wavelet signal has a strong ability of fault detection, if reasonable choice of wavelet function and various parameters among the fault detection, the local feature of the fault signal can be intuitively got, thus supply the products with a effective tool. The current washing machine clutch all have a washing deceleration function, so it is called as low clutch. As one of the most common parts of rotating machinery, low clutch is also one of the easily damaged parts among the rotating machinery. According to statistics, thirty percent of the rotating machinery’s operational problems caused by the bearing faults[1]. Bearing defects can cause severely machine vibration and generation noise, or even cause damage to the equipment[4]. This article is mainly detect the low clutch’s vibration noise in operation by accelerometer, and deal with the collected data through wavelet transform, thus realize the On-line condition monitoring to the low clutch.
XFTRTS - A XtratuM Based Fault-Tolerant Real-Time Control System
Authors: Li Chan Juan , Zhang Chuan De , Zhou Qing Guo
Published: January 2012

Nowadays there are a few works which are concerned with the virtualization technology and the fault-tolerance technology, because virtualization system can provide an environment allowing multiple operating systems running in concurrent way. In this paper, we based on a real-time hypervisor-XtratuM, propose the architecture of a fault-tolerant real-time control system (XFTRTS), which provide local backup execution and to support different level diversity including N-version programming on a single host. Furthermore, we implement a prototype of XFTRTS and test its important performance metric–latency, which is within two microseconds.
The Research of Mutlibeam Data Registration Algorithm Basing on False Grey Scale Double-Zone Matching
Authors: Han Qing Nan , Hao Yan Ling
Published: January 2012

Combined with the characteristics of multibeam bathymetric data and grey scale image, this paper proposed an algorithm of mutlibeam data registration based on false grey scale double-zone matching. By analyzing the original grey normalized matching algorithm, this paper improved the original algorithm by adding another matching zone, and then deals the mutlibeam data with the algorithm of false grey scale and the new method this paper proposed. Finally, verified the new algorithm both on theory and simulation, and evaluated the running speed of the algorithm. The simulation results showed that the algorithm did improve the speed of program, which meets the requirement of real-time in multibeam data matching better.
MRAC for Direct Drive Electronic-Hydraulic Servo System
Authors: Han Lei , Wang Hong Jie , Li De You , Yao Yang
Published: January 2012

In order to improve the accuracy, stability and rapidity of response, the paper built the mathematic model, and designed the high order system following the low order model based on Popov Hyperstable theory. Then applied this control method and PID method in actual system, compared them in time domain response. The result approves that the system owns better rapid and stable characteristics, satisfying the requirement when the direct drive electronic-hydraulic position control system changes its conditions. Further, improves that the theory is correct, certificates that the MRAC is very adaptive to the direct drive electronic-hydraulic servo system.
Research on Short-Delay Adaptive Current Protection Scheme for Shipboard Electrical Power Systems
Authors: Zhen Hong Bin , Zhang Xiao Feng , Qi Lian Suo , Huang Jing
Published: January 2012

For specific mission and unique configure of Shipboard Electrical Power Systems (SEPS), their relay protection schemes are different from Terrestrial Electrical Power Systems (TEPS). With development of system capacity and network topology, the traditional three-step current protection method can not meet protection demands, which has the feature of off-line setting. Based on the characteristic and requirement of SEPS, a new short-delay adaptive current protection scheme is proposed, which can automatically adjust current settings of short-delay protection on-line according to the system operation state. Simulation results of typical instance verify the feasibility and validity to improve protection performance.
The Design of Intellingent Fire Monitor System Based-On Digital Image
Authors: Liu Xiao Xu , Huang Xiao Li , Cao Lin
Published: January 2012

Fire seriously affects people's lives and property, a large space building early fire detection and fighting has always been an international problem. Combining image recognition and processing technologies, intelligent control technology, we design an image-based intelligent fires fighting monitor system. Using this system, able to automatic pursuit fire, automatic alarm, timely and effective fixed fire-fighting in a large space. Can be used to protect the larger, higher risk important places. The system network flexibility, expandability, has been successfully applied to many practical projects.
GPS-Based Navigation for the Blind
Authors: Cao Lin , Huang Xiao Li
Published: January 2012

Based on GPS positioning technology，taking ARM920T core S3C2440A processor as the control core, complete the design of blind navigation. The navigator can be more accurate to tell the current time, direction, location names and other detailed information for the blind and their families by means of voice broadcast and liquid crystal display, the system easy to operate, simple and greatly enhanced the bind’s ability to walk around, better usability, may become widely used by the blind.
Design Low Voltage FGMOS Operational Amplifier for Power Applications
Authors: Jamal M. B. K. , Chew S. P. , Ismail Khadijah , Noormiza S. B. M.
Published: January 2012

Due to the rise in demand for portable electronic device, low power and low voltage circuit design is extremely important for the appliances like computers, laptops, mobile phones and etc. Low power dissipation results in longer battery life and better integration density. This can be achieved by designing a modified low voltage op amp. The design of low voltage op amp in this paper is the combination of several low voltage analog cells. The modified low power op amp in this paper is built based on low voltage basic op amp. In this paper, the design objective is to achieve certain criteria such as supply voltage as low as 1 V, high gain more than 40 dB, low power consumption and high bandwidth. The use of FGMOS would increase the operating range of op amp through programming the threshold voltage of the FGMOS. This project is simulated using Silvaco Gateway and Expert.
Ultra Wideband Indoor Positioning Using Kalman Filters
Authors: Zhang Li , Zhang Hao , Cui Xue Rong , Gulliver T Aaron
Published: January 2012

A time-difference-of-arrival (TDOA) positioning technique for indoor ultra wideband (UWB) systems is presented. Non-line-of-sight (NLOS) propagation error is a major source of error in positioning systems. Therefore an NLOS mitigation technique employing a Kalman filter is utilized to reduce the NLOS errors in indoor UWB environments. An extended Kalman filter (EKF) is used to process the TDOA data for mobile positioning and tracking. Performance results are presented which show that the proposed scheme can significantly improve the positioning accuracy in a UWB environment.
Web Surface Defect Segmentation Based on Stationary Wavelet Transform
Authors: Wang Zheng
Published: January 2012

Typical characteristics of web manufacturing process ,when compared with other sheet or flat product manufacturing, are the large value of web width and production speed .So the development of new and efficient algorithm invokes the interests of many researchers. This paper describes a novel approach based on stationary wavelet transform for the segmentation of web surface defect. The segmentation is performed firstly by decomposing the gray level image into sub-band images and then by an image fusion scheme for the sub-images. Compared with orthogonal wavelet transform (OWT), the notable advantage of stationary wavelet transform (SWT) is its shift invariance. These properties are especially important for defect detection. Image fusion makes full use of available information in each sub-band images to obtain better output results when compared with ordinary image enhancement. Experimental results demonstrate the validity of our method. The proposed method is targeted for web surface defect inspection but has the potential for broader application areas such as steel, wood and fabric defect detection. With the development of high performance signal processors, spectral analysis or a combination of statistical and spectral analysis would be the trend of web surface defect inspection.
Inplementation of an Efficient Parallel Multilevel Fast Multipole Algorithm
Authors: Chen You Feng , Su Dong Lin , Zhao Xiao Ying , Guo Dan Dan , Deng Li Peng
Published: January 2012

This paper is concerned with the implementation of the parallel multilevel fast multipole algorithm(MLFMA) for large scale electromagnetics simulation on shared-memory system. The algorithm is implemented on a method of moment discretisation of the electromagnetics scattering problems.The developed procesure is validated by compared to benchmarks defined by Electromagnetics Code Consortium(EMCC) .The procesure can evaluate large problemssuch as electromagnetics scattering of aircraft at high-frequency with up to several millions of unknowns.
Dynamic Grid-Based Algorithms in DDM
Authors: Wang Hui Ru , Ding Jing
Published: January 2012

For large-scale distributed interactive simulation, it is important and difficult for data to communicate among thousands of objects. The purpose of the Data Distribution Management (DDM) service performs data filter and reduces irrelevant data between federations. Grid-based algorithm can only manage to filter part of irrelevant data. Experimental results show that, compare with normal grid-based algorithms, the dynamic multicast method can minimize.
A Self-Adaptive and Variable Step Length Alopex Algorithm
Authors: Li Dong
Published: January 2012

Alopex is a heuristic and optimum algorithm. A self-adaptive and variable step length Alopex algorithm was raised to exceed local optimal solution and to approximate global optimal solution based on modified Alopex algorithm. To improve modified Alopex approximation precision further and eliminate the follow-on shocks appearance, the reasonable alter of δin was implemented. The simulation results show algorithm optimized is practicable and effective.
Qualitative Analysis of Acoustics Emission Signal Parameter Character during the Bending Loading Course
Authors: Wang Wei , Zhen Yu , Heng Hui Ming , Wei Hong Xing , Cheng Wei Dong , Qi Wei
Published: January 2012

In order to find the typical acoustic emission (AE) parameters for distinguishing the original specimen without being welded and the specimen with blowhole defect all made of WELDOX960 steel. Three-point bending test on the two specimens were conducted respectively. Firstly, from the procedural map, we deduced that the reason why there was such a sudden energy leap is because of the activities of welding crack, and the multistage energy release also because of the step by step propagation of welding crack in despite of any kind of welding defect. AE parameter distribution map and statistical distribution analysis results also validated the before-mentioned judgment. We found the parameter distribution map of amplitude, count, duration time and centroid frequency of the two specimens were distinctly different, thus those characters can be used as the indicator on its own for distinguishing the two kinds of AE source, i.e., the plastic deformation and the crack generation and propagation
Identification of Complex System Based on Neural Network
Authors: Dou Zhen Hai , Wang Ya Jing
Published: January 2012

In order to conquer the difficulty of building up the mathematics model of some complex system, model identification method based on neural network is put forward. By this method, according to actual sample datum, the complex model of crude oil heating furnace is identified at appropriate quantity of net layers and notes. The identification results show that output of model can basically consistent with the actual output and their mean squared error (MSE) almost is 0. Therefore, model identification method based on neural network is an effective method in complex system identification.
Ant Colony Algorithm Application in Water Treatment Control System Parameter Tuning
Authors: Chen Shu Qian , Zhang Li Hong
Published: January 2012

In Thermal Power Generation and heating Water Treatment process, duo to the water supply pipeline pressure and flow changes, the traditional PID control system controller cannot the prompt track response, PH value of water changes in a larger range, increased damage to the boiler pipes. In order to solve the problem which the control parameters optimizes, improves the system performance, proposed a new Ant colony algorithm PID parameters optimization strategy, this solution can combine characteristics that Ant colony algorithm can fast find the most superior parameter solution stably and PID can precise adjustment. In the control process, taken the PID parameters as a colony of ants, used to control the absolute error integral function as the optimization objective, dynamically adjust the PID control parameters in the control process, so as to realize the PID parameters on-line tuning, to improve real-time of the water treatment control system, improved the stability of the system, and achieve a better control effect.
Electric Vehicles and the Vehicle-to-Grid Technology
Authors: Tu Yi Yun , Bian Xiao Yan , Li Can , Cheng Lin , Li Hong Zhong
Published: January 2012

Electric vehicles(EVs) potentially provide some valued services to the power grid. In this paper, a review of the history, the concept, the types of EVs are discussed. Meanwhile, as EVs moves to electric drive, an opportunity opens for “vehicle-to-grid” (V2G). V2G describes a system in which battery EVs, plug-in hybrid EVs or fuel cell Evs communicate with the power grid to provide peak power, spinning reserves or regulation services. In addition, it can provide renewable energy storage and backup in the future. So the functions, the scheme , the transition path and the foreground of V2G are introduced.
Price Discovery Analysis of Oil Futures Market: A View of Interaction Effect
Authors: Zeng Yong , Chen Lei
Published: January 2012

Whether oil futures market can perform price discovery function well is very important in global economics and energy markets. The interaction between oil spot and futures prices exists due to intraday information transfer and arbitrage trading. However, the traditional methods used in price discovery analysis ignore the interaction, and thus introduce the biased conclusions. This paper uses simultaneous equation analyze the interaction effect between oil spot and futures returns, estimates the model by the method of modified identification through heteroskedasticity (modified ITH) and examines price discovery function of oil futures markets. Using weekly spot and futures prices of Brent crude oil, gas oil and heating oil between Feb 12, 1999 and Jan 30, 2009, the results suggest oil futures return will affect the corresponding oil spot return. The unidirectional interaction exists. This indicates the information will transfer from futures markets to spot markets and oil futures markets have the major price discovery function. This paper also offers a new view of examining price discovery, i.e. interaction effect.
Real-Time Computerized Tomography of Clay Deformation during Triaxial Compression
Authors: Sun Hong , Ge Xiu Run , Niu Fu Jun , Hou Ming Xun
Published: January 2012

Clay is a kind of structured material, and its inner structure changes with the loading. Therefore it is meaningful to analyze the deformation characteristics of clay at mesoscale. Real-time Computerized Tomography (CT) scanning experiments of clay subjected to triaxial loading were performed. The most significant aspect of the study was that real-time scanning was performed without unloading during shearing test. The deformation of clay subjected to triaxial loading is basically manifested by uniform deformation at the mesoscale. If clay structure and adhesions between soil particles are of big difference, the deformation is manifested by localized deformation. The latter average CT number-strain curve is divided into three stages as: (a) damage starts; (b) damage develops; and (c) softening failure.
Static and Dynamic Characteristics Study of Wind Turbine Blade
Authors: Zhu Jie , Cai Xin , Pan Pan , Gu Rong Rong
Published: January 2012

Structural analysis of wind turbine blade is a necessary part in the process of blade design. Based on the ANSYS software, the stress and strain distribution analysis of a kind of 1500kW horizontal axis wind turbine blade is carried out at the action of ultimate flapwise loads, the vibration mode shapes of this blade are also analyzed in this paper, thus providing some reference value for the larger-scale wind turbine blade on structural design．
Perception about the Rebound Effect Appearing after Energy Efficiency Improvement in the Household Sector of China
Authors: Ouyang Jin Long , Hokao Kazunori
Published: January 2012

The ubiquitous discrepancies between predicted and actual outcome of energy efficiency improvement have attracted much attention of the Chinese experts in the field of household energy efficiency. But few people in China realize that it is rebound effect that induces such discrepancies, which at present has been widely accepted in the developed countries. First, in this article the definition and formation process of the rebound effect in the household sector have been described. Then, a high rebound effect of at least more than 30% and more than 50% has been perceived through the combination of the actual situation of China and the experience of other countries. Finally, the influence of the rebound effect in the household sector has been proven negative on the energy demand and energy security of China.
A Comparative Study on Oil System for Supercritical Steam Turbine Made in Domestic with 600MW Capacity
Authors: Guo Jing Xiao , Xie Dan Mei
Published: January 2012

Nowadays, numbers of supercritical steam turbines made in domestic with 600MW capacity have been put into operation in China. The safety of these units will have great impact on the safety and stability of the network. The features of these units, such as constructions, governing modes and system arrangements receive much more attentions. This paper analyzes the characteristics of oil system of supercritical 600MW steam turbine made in domestic from following aspects: lube oil system and EH oil supply system etc.
A Parellelzing Modified Particle Swarm Optimizer and its Application to Discrete Topological Optimization
Authors: Yang Bin , Zhang Qi Lin
Published: January 2012

recently, a modified Particle Swarm Optimizer (MLPSO) has been succeeded in solving truss topological optimization problems and competitive results are obtained. In order to reduce its execution time for solving large complex optimization problem, a parallel version for this optimizer (PMLPSO) is studied in this paper. This paper first gives an overview of PSO algorithm as well as the modified PSO, and then a design and an implementation of parallel PSO is proposed. Since most of structural problems involve discrete design variables, an effect strategy is involved in MLPSO in order to operate on discrete variables. The performance of the proposed algorithm is tested by two examples and promising speed-up rate is obtained. Final part is conclusion and outlook.
An Improved Artificial Fish Swarm Algorithm and its Application
Authors: Guan Xin , Yin Yi Xin
Published: January 2012

An improved algorithm (AFSA-IWO) was developed based on the artificial fish swarm algorithm (AFSA) and invasive weed optimization (IWO). It introduces IWO, and improves its mechanism of the competitive exclusion to meet practical application. Convergence analysis was performed with some typical benchmark test functions and comparison was made with AFSA. At the same time, it uses the AFSA-IWO to optimize the PID parameters. The results showed that the approach presented better ability in leaping over the local extremum and enhancing local exploration, and can void blind searching in the later evolution period. So it is a global optimization algorithm with good feasibility and high efficiency.
Design and Implementation of CRM Based on Data Mining
Authors: Wang Hui Ping , Zhong Ruo Wu
Published: January 2012

Basic theory knowledge of CRM and data mining is introduced in this paper; and the features of CRM based on data mining are analyzed. Based on an example of telecommunication industry, the function modules are designed.
Research on an Single Pattern Matching Algorithm
Authors: Zheng Qiang
Published: January 2012

The design of exact single pattern string matching algorithm with high performance is the basis of all string matching problems. To overcome the defects of low efficiency of pattern matching, this paper improves one of the fastest exact single pattern matching algorithms known on English text, which is SBNDM2。The simplest form of the BNDM core loop is obtained, in which there are only 5 instructions per-character read by amending the relationship between position in the pattern and bit in the bit mask. And a cross-border protection method is added to the algorithm in order to reduce the cost of cross-border inspection. Two algorithms named S2BNDM and S2BNDM′ are presented. The experimental results indicate that both S2BNDM and S2BNDM′are faster than SBNDM2 in any case.
Analysis on Deck Replacement Plans of the Main Span of Jiubao Bridge
Authors: Su Qing Tian , Yang Guo Tao , Wu Chong
Published: January 2012

Bridge decks in composite bridges endure local vehicle load directly and failure is apt to occur in bridge decks, so the decks in Jiubao Bridge were designed to be renewable components. Space finite element model of Jiubao Bridge was established. Stress variation of upper and lower edge of the girder under dead load was analyzed when each deck changed locally. Stress variation processes of various whole span replacement plans had been analyzed and the stress envelope was obtained. The calculation results show that local bridge deck replacement has no obvious influence on the steel girder stress. While the plan that remove bridge decks from mid-span to arch foot has less influence on the girder stress compared to other whole span replacement plan.
A Novel Transient Directional Unit Based on Adaptive Median Filtering
Authors: He Ren Wang , Yang Yi Bo
Published: January 2012

A new transient directional unit for extra high voltage(EHV) power transmission lines is proposed, which identifies fault direction by means of comparing the time-domain transient energy of the forward traveling-wave with that of the backward one in the very short period of time after fault occurs. The unit algorithm is designed with the technology of adaptive median filtering, which is first employed to process the forward and backward traveling-waves, and then calculates the time-domain transient energy ratio of the forward traveling-wave to the back one, by which the fault direction is discriminated. Numerous ATP-EMTP simulation tests show that this proposed directional unit not only operates reliably, sensitively and ultra-high-speed, but also endure the influences of various factors, including different fault types, fault locations, transition resistances or fault inception angles. It will be worthy of application greatly.
Calculation of Reservoir Water Content Index Based on C#
Authors: Gao Bing Kun , Song Zhao Yun , Yue Mao Xing
Published: January 2012

The reservoir water content index calculation is an important task of geological logging. This paper overcomes the existing error at calculating the water content index with traditional method, implements a set of water content index calculation software with C# programming. It enables data import, create evaluation chart board for water content automatically, data storage and other functions, and after users manually draw partition lines, the software can accurately calculate the water content index of the given points and new points, and also can predict the properties for new reservoir points according to the calculated water content index. This software implements detailed evaluate information of reservoir water content, saves a lot of human resources and achieves office automation.
A Wireless Sensor Network Localization Method Based on Dynamic Path Loss Exponent
Authors: Qiao Gang Zhu , Zeng Jian Chao
Published: January 2012

The path loss exponent shows the effect of space environment on the RF signals in wireless communication model. In most RSSI based location method the path loss exponent is assigned a fixed empirical value which can not reflect the actual environmental impact of the wireless signal, which lead to low position accuracy and considerable positioning error. Aiming at some complex and rapidly changing environment a path loss exponent dynamic acquired algorithm is proposed, which can calculate the actual path loss exponent with the distance and the RSSI value information between adjacent beacon nodes. On basis of the path loss exponent dynamic acquired algorithm a path loss exponent dynamic acquired based localization algorithm is proposed which can estimate the blind node position with the actual path loss exponent, and can improve the adaptability to the environment of the RSSI location algorithm. The simulation shows that the positioning accuracy of proposed method is significantly improved and the effect of proposed method is more precise than the common RSSI method under the same environment.
A Digital Regulator for FPGA Implementation
Authors: Qian Xiang Ping , Qiao Wei Ming , Zhou Zhong Zu , Chen Xi Meng , Jing Lan
Published: January 2012

A digital regulator architecture implemented in FPGA is described which is used in the accelerator power supply. To save the delay time, the device is based on combinational circuit and special data format. The multiplier uses the partial products generated by modified Booth algorithm, Carry look-ahead adder and Wallace tree. The regulator is written in Verilog, and is synthesized into FPGA. The synthesis results shows that the proposed regulator can run 200MHZ clock rate in FPGA EP3C25F256 and the whole feedback time is as short as 3 clock periods.
Resolution to Safety Access Control of USB Movable Storage Device
Authors: Yu Zhen Hai , Liu Xin Jun
Published: January 2012

USB movable storage devices have been bringing significant convenience for data interchange among computers while chances of invalid copy and sensitive data leakage are exposed. In order to decrease the leakage possibility of confidential information, unilateral control takes effect in USB device. This paper introduces how to realize the unilateral control of USB device and elaborates the key technique thereof.
A Method of Lower S/N Signal Detection by Amplifier and Computer
Authors: Lu Qi Rong , Wei Yan Bing , Huang Bing , Gao Dong Mei
Published: January 2012

A new detection method of weak signal mixed in strong noise is proposed. The method includes theory scheme, hardware and software. It detects and processes signal by using the instrument magnifying technology and single-chip microcomputer control. By means of virtual instrumentation simulation and display, this design provides effective methods to detect µA-level weak signal in piezoelectric infrared detector. Through the experiment of simulate low frequency weak signal detection, the system fully reveals its practicality and superiority in the field of lower S/N signal detection.
Detection Design and Implementation of Image Capture and Processing System Based on FPGA
Authors: Xu Guo Sheng
Published: January 2012

Due to the project in this article, a kind of image capture and processing system based on FPGA is proposed, the low cost high performance FPGA is selected as the main core, the design of the whole system including software and hardware are implemented. The system achieves to functions of the high -speed data collection, the high -speed video data compression the real time video data Network Transmission and the real time compression picture data storage. the data processed was transferred to PC through USB2.0 real-time to reconstruct defects microscopic images. Experimental results prove right and feasible by adopting the algorithm and scheme proposed in this paper.
The Study Processing Based on CCD Scanning and Detecting Device on FPGA
Authors: Li Chang Ming , Xu Guo Sheng
Published: January 2012

To solve the crossing-linkable polyethylene (XLPE) insulation compound purity evaluation problem, a high speed scanning measurement system was designed according to FPGA. With the updated information technology and advanced electronic devices, it is possible to develop a new inspecting technology for sorting, checking and evaluating material quality, by which defects microscopic images can be real-time recorded, processed and displayed. The result shows that this system can measure the size of impurity particles of XLPE cable materials correctly, it also can find out the accurate location and numbers of impurity particles. The resolving power of this method can reach 20 m and the error is less than 10%.The possibility that the impurity particles can be checked out is up to 100%.
Research for Multi-Path Transmission and Network Coding in Wireless Sensor Network
Authors: Xia Zhuo Qun , Liu Chao , Zhu Xue Han , Liu Pin Chao , Xie Li Tong
Published: January 2012

Wireless sensor network (WSN) is a emerging, highly integrated field which involves several subjects and colligate knowledge at present .It contains a large number ,even thousands of nodes concentrating with the monitor that controls wireless communications network systems .The nodes extensively distributed have facility of breaking down because of the diversified environment and exhausting of energy .For the limit of energy and communication capacity, this paper comes up with a new kind of technique that we import the multi-path transmission combined with network coding into WSN to balance network load, reduce energy consumption integrally and extend network life cycle.
An Encryption Algorithm by Scrambling Image with Sudoku Grids Matrix
Authors: Wang Yue Yue , Wan Dong , Sheng Hong Yu
Published: January 2012

An image encryption algorithm by scrambling both the pixel location and the pixel value with sudoku grids matrix is proposed in this paper. As there is a certain mapping mode Between the Natural order and the numeric order in the row, line and block in sudoku grids, the proposed algorithm adopts the sudoku grids as secret key and scrambles the image according to the certain mapping mode. The algorithm is suitable for image with any size. The simulation experiments show that it has good encryption efficiency and perfect encryption effects. Also the transferring attack can be distributed equally by the algorithm which has high robustness, and good restoration result is produced.
Research on Pitch Extraction Algorithm of Noisy Speech
Authors: Xing Hong Yan , Yu Cui Hua , Li Peng
Published: January 2012

Pitch detection in noisy environment plays an important role in speech analyzing and recognition. In the light of the properties of Hilbert-Huang transform and the EMD soft-threshold de-noising method, an effective pitch detection method for noisy speech signal is proposed in this paper. Firstly, the EMD soft-threshold de-noising method is applied to realize the background noise reduction, secondly, using the Hilbert-Huang transform to detect the pitch period of the de-noising speech signal. The analysis proposed in this paper show that, compared with the conventional methods of the pitch detection of the noisy speech, especially for the low signal to noise ratio (SNR), this approach has a higher accuracy.
Enhanced Line Pilot Impedance Algorithm Based on Parameter Identification
Authors: Xia Jing De , Suo Nan Jia Le , Wu Shou Shan , Wang Li , He Shi En , Liu Kai
Published: January 2012

This paper proposes a novel enhanced transmission line pilot impedance algorithm based on parameter identification, which is defined by the fault component sampling values of voltages and currents at both terminals of this line, and is used to distinguish the internal faults from the external faults. For the external fault, the magnitude of the computing inductance or resistance are greater than the determining data based on the series positive sequence inductance or resistance of the protected line, whereas they are smaller than the aforesaid setting values for the internal faults. The algorithm eliminates the inter-phase coupling caused by the unbalanced grounding fault, so it is the individual phase protection algorithm and possesses the high stability and reliability and immunes to the influence of load state and fault resistance. Performance analysis shows that the algorithm can be used various length lines through the line capacitances time domain compensation and may directly apply the line including the series compensating capacitors. Because the algorithm uses the short data window criterion, it has the short operating time and the little influence of transient components. It builds 1000kV 500km line model on EMTP, uses a laboratory model simulation data of a power system from Lan Zhou Dong to Xian Yang 750kV, executes the simulations under each fault. The simulation results indicate the fact that this algorithm can judge the aforesaid various fault state.
Study on a New Industrial Control Protocol – Ethernet/IP and its Implementation
Authors: Liu Chuan Hui
Published: January 2012

This paper has a discussion on the new industrial protocol – EtherNet/IP protocol (EIP), which is a new standard of field bus standard. It is an open industrial networking standard that supports real-time I/O messaging, explicit message exchange. It uses commercial off-the-shelf Ethernet communication chips and physical media. In this paper we have done a detailed study on the composition of EIP packet, EIP command of its application, EIP message transfer and it industrial implementation architecture.
The Design and Realization of Multi-COM Protocol Switch Server Based on ARM and FPGA
Authors: Liu Xiao Ming , Zheng Shu Hui
Published: January 2012

Based on the system hardware structure and the function of ARM system and the function of FPGA circuit, the realization of multi-COM protocol switch server is put forward. This way not only enables the developing work to be divided clearly into different parts, but also enhances the expansibility of the server, sustains complex functions, and makes the realization simply. This system has been realized and had a good effect when it works.
The Design of Course-Oriented Online Judge
Authors: Yi Chao , Du Xiao Yu , Feng Su , Li Si Yuan , Zhuo Yue
Published: January 2012

In this paper, the disadvantages in traditional item bank are analyzed, and traditional Online Judge is improved to fit the course teaching. Then, Algorithm Design and Analysis course is taken as an example to demonstrate how to apply COOJ to course teaching. After that, COOJ's advantages are analyzed against traditional Online Judge and Web-Based Collaborative Learning Platform.
Main Points of Environmental Protection in Three Jiang Yuan Area
Authors: Gu Xiao Xu , Li Zhu Long , Shi Wei
Published: January 2012

This article analyses ecological environment in three jiang yuan area, and deeply studies main technical points of environmental protection. While it takes examples from environmental improvement on Qinghai-Tibet highway,puts up main technical points of environmental protection in Xining-Yushu road, and suggests research interests of environmental protection in three jiang yuan area. So this article plays an important guidance for road construction in three jiang yuan area.
Optimization of Mixed-Cultivation Conditions of Methanotrophs from the Aged Refuse
Authors: Mei Juan , Zhao You Cai , Su Qun , Han Dan , Huang Ren Hua , Chen Hao Quan
Published: January 2012

Methanotrophs-bearing liquid cultivated from the aged refuse has been proved to be effective for improving methane oxidation ability of landfill cover materials, and this is significant for CH4 emission control in landfill site. Optimization of mixed-cultivation conditions of methanotrophs from the aged refuse was studied in this paper. It was demonstrated that the best inoculums mode was using supernatant liquor of the aged refuse and nitrate minimal salt medium (NMS), and the lag phase of the growth was only 37 hours. The optimum growth of methanotrophs was observed at 28~35°C. Paraffin was attested to be useful for mixed methanotrophs cultivation and the highest methane oxidation rate reached 4mL/h with paraffin added.