bluuebunny/crossref_metadata_2025 huggingface dataset:
Laminar Burning Velocity and Flammability Characteristics of Biogas in Spark Ignited Premix Combustion at Reduced Pressure
Authors: Anggono Willyanto , Wardana I.N.G. , Lawes M. , Hughes K.J. , Wahyudi Slamet , Hamidi Nurkholis
Published: August 2013

Biogas as a “Powergas” is an alternative fuel produced in digestion facilities, that is sustainable and renewable. Based on chemical analysis, the composition of the biogas produced in East Java is 66.4% methane, 30.6% carbon dioxide and 3% nitrogen. Methane is a flammable gas, whereas, nitrogen and carbon dioxide are inhibitors. Given it has a different composition to traditional fuels, a fundamental study of biogas flame propagation characteristics is desirable to quantify this important fuel property. Spherically expanding flames propagating at constant pressure are employed to measure the laminar burning velocity and flammability characteristics as mixture function of the mixture composition. These important parameters were measured using a photographic technique in a high pressure fan-stirred bomb. The characteristics of biogas-air flames were initially studied at reduced pressure and at various equivalence ratios from the lower flammable limit to the upper flammable limit. The results were compared with those from biogas-air flames at atmospheric pressure. Based on this experimental investigation, the laminar burning velocities of biogas-air mixtures at reduced pressure were 0.218 m/s for ϕ=0.75, 0.246 m/s for ϕ=0.80 and 0.269 m/s for ϕ=0.85 respectively and only for these biogas mixtures propagated at reduced pressure. At the same equivalence ratio (ϕ), the laminar burning velocities of the biogas-air mixtures at reduced pressure are higher than those at atmospheric pressure. The flammable region of biogas became narrower by reducing initial pressure. The dilution effect is stronger at reduced pressure. Therefore, the flammable composition mixture areas of biogas-air mixtures are more limited at reduced pressure than those at atmospheric pressure.
Technology of Laser Cladding of Powder Mixtures on Steel Substrate and Tribotechnical Characterization of Obtained Materials
Authors: Namazov S.N. , Rzaev E.D. , Dzhivishov V.F.
Published: August 2013

Complex approach to studying both qualitative and quantitative friction and wear characteristics of laser-clad layers has been applied. Both type and value of wear, friction factors have been determined as depended of the coating composition, load and temperature in dry friction. Comparative analysis between laser cladding and plasma spraying has been carried out.
On a Mechanizm of an Electric Field Influence on Physicotecnical Specifications of Materials
Authors: Rodzevich A.P. , Gazenaur E.G. , Krasheninin V.I.
Published: August 2013

The paper addresses experimental data that describe a constant noncontact electric field influence on physicotechnical specifications of materials, grown in an electric field, and conditioned in it. Experiments have shown that it is possible to control physical and technical specifications of materials changing intensity of a noncontact electric field during crystallization. It is observed that an electric field influences size, optical purity and conductivity of crystals grown in a field. Crystallization of inorganic salts in an electric field allows obtaining chemically pure crystals with minimum defects. A mechanism of an electric field influence on inorganic salts crystallization is provided.
Modeling Impulse Wire Feed Welding in Controlled Gas Shielding
Authors: Pavlov N.V. , Kryukov A.V. , Zernin E.A. , Polischuk V.A.
Published: August 2013

At present application of a shielding gas (Ar+CO2) is one of the methods to improve the efficiency of impulse wire feed welding. For further investigation of the considered welding method information processing technologies and the software required are to be applied. Special software “Modeling processes of controlled transfer of the electrode metal drop” is developed, and provides calculation of main technological welding parameters on the basis of adapted mathematical models and algorithms to compute a weld form, changes in heat zones and cooling speed of welded joint zones.
Method of Making Preforms for Composite Reversible Cutting Plates
Authors: Retyunski O.Y.
Published: August 2013

Variants of the up-to-date composite engineering materials. A process of cutting plates production is suggested and consists in rotating of a mould around its figural axis with changeable angular speed while a powder is loaded layer-by-layer into a mould
An Improved Recommendation Algorithm Based on Graph Model
Authors: Chen Hong , Gan Ming Xin , Song Meng Zhao
Published: August 2013

According to the problem that the traditional search algorithms dont consider the needs of individuals, various recommender systems employing different data representations and recommendation methods are currently used to cope with these challenges. In this paper, inspired by the network-based user-item rating matrix, we introduce an improved algorithm which combines the similarity of items with a dynamic resource allocation process. To demonstrate its accuracy and usefulness, this paper compares the proposed algorithm with collaborative filtering algorithm using data from MovieLens. The evaluation shows that, the improved recommendation algorithm based on graph model achieves more accurate predictions and more reasonable recommendation than collaborative filtering algorithm or the basic graph model algorithm does.
PSO Algorithm Based on Perception Range and Application in the Constrained Optimization
Authors: Liu Hong Xia
Published: August 2013

There is a shortcoming that particle swarm algorithm is ease fall into local minima. To avoid this drawback, this paper insert into a perception range that from Glowworm swarm optimization. according to domain to determine a perception range, within the scope of perception of all the particles find an extreme value point sequence. All the particles that in the perception scope find a extreme value point sequence, which apply roulette method, in order to choose a particle instead of global extreme value. So as to scattered particle, and avoid the local minima.
Multi-Response Linear Polynomial Regression Models Designs
Authors: Zhang Xuan Hao
Published: August 2013

The multi-response linear polynomial model is transformed into a single response polynomial model. In symmetric test area, for the polynomial models the A-D- and E-optimal experimental designs are obtained.
An Effective Optimization Method Based on the Genetic Algorithm to Solve TSP
Authors: Hu Xi Tao , Huang Jun , Wu Shun Xiang
Published: August 2013

The Traveling Salesman Problem is one of the most intensively studied problems in computational mathematics. Due to the basic genetic algorithm convergence speed is slow, easy to stagnation. We present in this paper a new improved mutation strategy to solve this problem. Roulette wheel selection strategy is used to avoid running into trap of the part best value. And simulated niche method is introduced to accelerate the search process effetively. This algorithm has been checked on a set of 144 cities in China and it outperforms the results obtained with other TSP heuristic methods.
Multi-Agent Collaborative Research Based on an Optimization Method about Multiple Evaluation Function with Hybrid Particle Swarm with Constraints
Authors: Wang Zai Jun , Fang Bao Fu , Liu Wei
Published: August 2013

This paper presents an optimization method about multiple evaluation function with hybrid particle swarm with constraints on the base of an optimization algorithm of hybrid particle swarm, which is used to solve the problem of multi-agent collaboration in the rescue simulation system. The optimization process uses a variety of evaluation function and also calculates the constraint relationship among the evaluation functions on the particle iterative process in order to obtain multi-objective optimization results that meet multiple conditions. The method is suitable for the collaborative problem among a variety of heterogeneous agents, which presents the collaboration among heterogeneous agents through constraints. The method proves to be effective in the practical application of the rescue simulation system.
Application of Wavelet Algorithm in Spectral Analysis
Authors: Cui Wei Ping , Yu Zhen
Published: August 2013

The purpose of this paper is combined with the advantages of wavelet transform and FFT, using wavelet transform to change the signal decomposition, and the use of FFT and filter for the reconstructed signal to decompose the signal and extract the different frequency components. In processing, we find that there is frequency alias in sub-band reconstruction which is caused by Mallat algorithm. In this article, we offer a solution of this problem.
A New Image Segmentation Method Based on FCM and Ant Colony Algorithm
Authors: Lu Jue , Hu Rong Qiang
Published: August 2013

FCM method and ant colony algorithm are all traditional algorithms in image segmentation. The two algorithms can complement each other. The combination of two algorithms will improve image segmentation and speed up algorithms convergence. Tests prove new hybrid algorithm is more effective than single algorithm in image segmentation detection.
Study on Cooperative Evolution Behaviors in Spatial Public Goods Game Based on Self-Questioning Mechanism
Authors: Feng Rui Xue , Ge Juan
Published: August 2013

We introduce a self-questioning mechanism under spatial public goods game in the framework of Evolutionary Game Theory where players are located on a square lattice and realize it by a intensity parameter a. By stimulation and analysis, we find that compared with the original Fermi updating (a=0), the introduction of the self-questioning (a>0) can be better promote cooperative behavior at the smaller r. Subsequently, we stimulate in self-questioning mechanism (a=1), the cooperator frequency fc as a function of the factor r for different values of noise K. Results show that at the larger and smaller noise K, the system presents a considerably different cooperation phenomenon. Whats more, fc as a function of r has center symmetry nature about point (5.0, 0.5) whatever the noise K is. Further analysis indicates the reasons for the formation of these phenomena. Finally, we report the agents average payoff in the steady state and its reasons for it.
Low-Power High-Modularity Architecture for 8-Point DCT Computation
Authors: Huang Hai , Liu Jiang Ming , Wu Bo , Wang Wei Dong
Published: August 2013

In this paper, a low-power and high-modularity architecture for 8-point discrete cosine transform (DCT) computation is proposed. The coordinate rotation digital computer (CORDIC) based fast algorithm for DCT computation is derived using matrix decomposition. The sum-angle formula and double-angle formula is used to reduce the CORDIC types. Thus, a high-modularity DCT architecture is obtained by reusing the unique rotation angle CORDIC. The experimental results show that the proposed DCT architecture has lower power and higher modularity than other known architectures.
Research on Real-Time Network Forensics Based on Improved Data Mining Algorithm
Authors: Chang Xu , Pei Shan Shan , Su Na
Published: August 2013

According to the characteristics of high precision and massive amounts of data processing during real-time network forensic, combining the defects of traditional Apriori algorithm which scan data sets more times, the paper improved Apriori algorithm, the data set is divided into parallel processing blocks, and then use dynamic itemsets counting method weight each block to construct tree, and depth-first search the tree, mark the data set which is divided out of the data block, and dynamic evaluation all the items set which has counted in order to acquire frequent itemsets, reducing the number of scanning, improved data processing capability of network forensics, use K-mediods algorithm for secondary mining to improve the accuracy, reduce network data loss, improve legal effect of network crime evidence.
A Microblog Classification Scheme Based on Partial Indexing
Authors: Wang Bai Rong , Yuan Jing Bo , Yang Ji Hao
Published: August 2013

As a new media platform, the social network like microblog has aroused wide concern in recent years. People become more and more interested in information from microblog. How to retrieval the huge amount of newly created contents in real time is the key issue of microblog, so real-time search is a scalable indexing service that microblog must provide. Analysis on Sina microbolg, a microblog classification and indexing process has been put forward on basis of partial indexing mechanism. Instead of indexing the whole dataset, a partial index is to index the records that may be queried with high probability. The classification scheme can effectively save the real-time search costs and obtain microblog data with high quality.
Research on the Attack and Defense Technologies of Wireless Sensor Networks
Authors: Yang Xiang , Wang Wei
Published: August 2013

Wireless sensor network is one of the three emerging technologies which have changed peoples life in the 21st century. More and more scholars at home and abroad are interested in wireless sensor network because of its vast potentials for future development. However, because of openness of the wireless sensor network, it is easily attacked by several network aspects. This paper will introduce the basic concept of wireless sensor network first and then present potential safety hazards on each protocol stack layer of the wireless sensor network from the perspective of layered network. An overview of the current popular means of defense on each protocol stack layer will also be summarized and the future research trend of attack and defense means of the wireless sensor network will be put forward finally in this paper.
Access Control Based on File View
Authors: Mao Xin Yu
Published: August 2013

Constructing the tree type logic structure of a file and introducing the view mechanism of database system into the file system, the hierarchical structure of view files is created. Different files ( view files ) are provided to different users according to their levels or interests by mapping layer by layer with beginning of the minimum access unit (the logic block). It can solve the problem of the discrepancy of users views.
Mining User Interests and Change Patterns in Microblog
Authors: Liu Dong , Wu Quan Yuan
Published: August 2013

Nowadays, more and more people use microblogs to share information. Consequently, mining microblog users behavior features is very valuable. In the paper, we propose a user interest mining framework. After data pre-processing, VSM is used to generate the feature vector of the tweet sets. Furthermore, k-bit binaries called interest hash-value and continuous interest hash-value are generated by use of Simhash algorithm. The user interests and change patterns could be mined by analyzing the hamming distance sequences between adjacent two hash-values. Taking Sina microblog as background, a series of experiments are done to prove the effectiveness of the algorithms.
Cooperative Mechanism of Local Memory and Cache in Network Processors
Authors: Yuan Bo , Fan Jin Dou , Liu Bin
Published: August 2013

Traditional network processors (NPs) adopt either local memory mechanism or cache mechanism as the hierarchical memory structure. The local memory mechanism usually has small on-chip memory space which is not fit for the various complicated applications. The cache mechanism is better at dealing with the temporary data which need to be read and written frequently. But in deep packet processing, cache miss occurs when reading each segment of packet. We propose a cooperative mechanism of local memory and cache. In which the packet data and temporary data are stored into local memory and cache respectively. The analysis and experimental evaluation shows that the cooperative mechanism can improve the performance of network processors and reduce processing latency with little extra resources cost.
Graphs as Models of Scale-Free Networks
Authors: Yao Bing , Yang Chao , Yao Ming , Wang Hong Yu , Chen Xiang En , Zhang Xiao Min , Li Mo Gang
Published: August 2013

In bioinformatics research field, researchers from biology, and physics, mathematics, computer science and other disciplines explore the mystery of genetic language by the combination of experimental researches and theoretical analysis, and try reveals the essence of biological genetic information. Bollobás and Riordan pointed out that the definition of scale-free in the context of network graph models has never been made precise. We use spanning trees and other graphs to illustrate some results and phenomenon and try expressing mathematically key notions from researching scale-free networks, and explore constructions and operations of complex networks.
Discussion about Big Data Mining Based on Hadoop
Authors: Deng Zhong Hua , Fan Bing , Lu Ying Jun , Li Zhi Fang
Published: August 2013

As a Cloud computing platform, Hadoop has huge advantages in Data mining. The main aspects of Hadoop for data mining are discussed. A technical framework for big data mining based on Hadoop is analyzed.
Study on Martial Arts Teaching System Reform Based on ICT Method
Authors: Zhu Kun Xue
Published: August 2013

with the implementation of new teaching reform, universities begin to reform the teaching mode. Sports has also been included in the reform on important curriculum system. Martial art courses have many functions which are welcomed by students, such as, self-defense, physical fitness and so on. But according to the investigation that martial arts curriculum resources are limited, many students cant successfully choose it. Even if students have selected, the teaching effect is not good due to the large number of students. In order to realize the teaching goal of students as the main body, students emotion as the main line, the paper relies on the latest information technology ICT method to study the reform of Martial Arts teaching system, and based on the ICT network integrated information service, it has made experimental verification on the system integration and equipment leasing of Martial Arts teaching system. On the basis of the requirement in "sports and healthy curriculum standard", it has made the teaching goal for students mastering certain difficulty training routines and the mutual practice, which achieves the comprehensive reform of Martial Arts teaching system, and provides a theoretical reference for the study of sports teaching new reform scheme.
Study on the Operation Model of Colleges Network Learning Propaganda and Public Opinion Guidance Based on the Internet
Authors: Li Chen Liang , Zhu Ming Xia
Published: August 2013

With the development of computer information science and technology, Internet has a large number of network propaganda and public opinion page every day. Through the network micro message and the micro-blog forwarding, network propaganda and public opinion have the impact on the development and stability of colleges, so the study network propaganda and public opinion has important significance for the development of colleges. Under this background, based on the computer Internet technology, the Internet erection of network propaganda guidance mode are analyzed, and compared with the fuzzy minimum production tree theory and the C language software, the network construction is verified. Finally the iterative process of finding the network transmission is relatively stable, after 800 iterative steps, numerical is slowly increasing, in which the maximum value is about 0.0001. The seven school propaganda is been as the minimum spanning of tree main network, its sum of weighted has been up to 1606.
Research and Implementation of the Web E-Mail System Based on the Cloud Media Platform
Authors: Li Bo Ran , Cao San Xing , Gou Feng Yi
Published: August 2013

With the rise and development of cloud technology, cloud-based systems has been widely used in various fields of Internet-based applications. This paper discusses the application model of cloud technology in media platforms. The second section of the paper presents the operating environment of the cloud media platform. Finally, this paper analysis specifically the implementation of the web E-mail system based on the cloud media platform presented above.
A Real-Time Traffic Lights Scheduling Strategy
Authors: Zhou Bin Bin
Published: August 2013

In this paper, we study the problem of real-time traffic lights scheduling in a three-dimension intersection. Here, we propose a traffic lights scheduling strategy to optimize the traffic lights sequence and duration according to traffic data detected and predicted in real-time, containing traffic volume, delays and traffic density. Simulations are carried out to compare the performance in terms of average delays, and the evaluation depicts that this strategy can obtain lower average waiting delays.
Research on Enterprise Information Security of the ERP System
Authors: Wang Cheng
Published: August 2013

With the wide application of ERP system in manufacturing enterprises in China, Issues of enterprise information security are becoming increasingly influential. On the basis of elaborating information security and information risk, this article analysis systematically the enterprise information security management system, and explore the key information security problems in ERP environment, and proposed the corresponding countermeasures and suggestions.
Online Self-Test System Grouping Function of Genetic Algorithm-Based Optimization
Authors: Zhang Li Ping , Xue Da Shen
Published: August 2013

The paper mainly discusses the genetic algorithm to optimize the test paper module and Research and Implementation of online self-test system. Online self-test characteristics of the system, coding, crossover and mutation improvement on traditional genetic algorithm. Experimental results show that, the improved genetic algorithm has better performance than the conventional genetic algorithm, improves the efficiency of solving the quality of test paper and issues, promotes a more widely used online self-testing system in the field of education.
Construction of Knowledge Model in Collaborative Learning System
Authors: Hao Shang Fu , Zhang Xia , Sun Bai Li
Published: August 2013

Base on the study of interactive collaborative learning system, a construction program of a knowledge-centric interactive collaborative learning system is proposed. The program adopts the knowledge point as the smallest element of teaching resource library, and constructs knowledge model through the relationship between knowledge points. In this paper, the course Computer Organization Principles is taken as an example to build knowledge point repository which is with a certain applicable value and be of guiding significance for the subsequent collaborative learning research.
Research of AODV Protocol Based on Ant Colony Algorithm
Authors: Wang Jun She , Zhang Yun , Li Xiao Long
Published: August 2013

in order to reduce the congestion in AODV protocol and decrease the time taking to find the route, CA-AODV protocol was applied to a routing selection algorithm with cognitive ability of an ant colony algorithm. The algorithm uses probability routing and diffusion of pheromone improving routing search capabilities, around development send congested nodes, to improve the route algorithm performance, enhance the adaptability of the algorithm. By comparing the improved routing algorithm With the original AODV protocol, the simulation results show that, the routing algorithm reduces the end-to-end delay and network congestion.
A Comparative Study on Feature Selection in Chinese Text Classification Problem
Authors: Li Hu , Zou Peng , Han Wei Hong
Published: August 2013

Information explosion brings lots of challenges to text classification. The dimension disaster led to a sharp increase of computational complexity and lower classification accuracy. Therefore, it is critical to use feature selection techniques before actual classification. Automatic classification of English text has been researched for many years, but little on Chinese text. In this paper, several classic feature selection methods, namely TF, IG and CHI, are compared on classifying Chinese text. Meanwhile, we take imbalanced data into consideration in the paper. Experimental results show that CHI performed better than IG and TF when the dataset is imbalanced, but no obvious difference on balanced data.
The Influence on Reactive Voltage of Large Scale Wind Power Connected to Grid
Authors: Lv Xiang Yu , Dong Tian , Yuan Ye , Li De Xin , Han Xiao Juan
Published: August 2013

Large scale wind power integration has influenced the safety of power system. Taking wind power integration in Jilin as example, the paper describes the influencing factors of large scale wind power integration on reactive power of the grid in detail firstly, then analyze the reactive voltage in four typical ways, and discuss the impact of the wind power fluctuations on the grid reactive voltage.
Leading Phase Operation and Voltage Regulation of Synchronous Generators
Authors: Lv Xiang Yu , Bi Zheng Jun , Dong Tian , Chang Xue Fei , Han Xiao Juan
Published: August 2013

The leading phase operation of generator is an effective method to reduce voltage of the key point which is much high in valley load period. This paper reviews the history on leading phase of generator and introduces the current situation on stable monitoring of the generators leading phase capacity. Meanwhile, this paper proposes main restricted conditions of generator leading phase and analyzed in details. At last some experiments are performed for part generating sets with a capacity of 100MW above in one province and obtained the experiment results on voltage regulation through leading phase of synchronous generating sets.
Sensor Robust Fault-Tolerant Control of Uncertain Systems with Time-Delays
Authors: Hu Ling Yan
Published: August 2013

According to the sensor failure possibly existing in engineering systems, the LMI approach is applied to design the passive fault-tolerant controller for a class of uncertain systems with state and control time-delay. The stable criterion of the sensor fault-tolerant system is given in LMIs to guarantee the closed-loop system to have robust stabilization and robust fault-tolerant capability basing on Lyapunov stability theory. A multi-state fault model is built to simulate the different fault types for sensor or other component fault. A numerical example of a heat treatment furnace is given to verify the effectiveness of the approach.
A New Regulated Power Supply Design
Authors: Wu Shi De , Yang Jin Feng , Ma Ze Yu
Published: August 2013

Based on the principle of electronic transformers, a new type of the power supply is designed, and the factors affecting the switching frequency are given. The feedback mechanism of the new power supply is analyzed in detail. Whats more, the pulse width modulation which controls switch tube adopts the RS flip-flop PWM. Finally based on the TL431, a 50W regulated power supply is design, which has a simple structure, small size, and low cost.
The Control System Design of AC Servo PMSM Based on an EMCU
Authors: Wang Xue Wen , Deng Zhou Hu , Yun Xiao , Zhang Long , Zhang Yuan
Published: August 2013

The mathematical vector model of a permanent magnet synchronous motor (PMSM) has first been discussed in this paper, and a servo control system based on Space Vector Pulse Width Modulation (SVPWM) has been designed, in which a enhanced Microprogrammed Control Unit (EMCU) is combined with drive chips and the relevant control software to achieve the precise control of PMSM. In order to control the position, speed and current of the PMSM, six SVPWM signals are generated with the motor vector control method, and the vector control strategy with three closed loops is projected. According to the control principle, the circuits of the hardware modules are designed and built, and the program of the control process is compiled and downloaded the EMCU, and then the human-computer interaction interface of the system is implemented by LabVIEW. The results of the test show that the control system designed can control the rotating speed and the high-speed pendulum operation of PMSM precisely.
Study on Project of Photovoltaic Power Plant Connecting to the Grid
Authors: Shu Yi Shi , Ma Li Li , Peng Chao
Published: August 2013

Large scale photovoltaic generation is another way to generate electricity.When a large capacity PV system connected to the grid,much impact could be brought to the grid due to its uncertainty. In this paper, there are research and analysis about the technology and characteristics of the photovoltaic power plants connected to the grid, make a strong practical impacts.
Study of Droop Characteristic in Advanced Co-Phase Traction Power Supply System
Authors: Wang Yuan , He Xiao Qiong , Shu Ze Liang , Xu Zheng  Xiang , Zhou Ying Ying
Published: August 2013

The disadvantages of two existing traction power supply modes are analyzed and advanced co-phase traction power supply system based on three-phase to single-phase converter is studied in the paper. Then, the chain model of network and the constant power model of locomotive are established. According to the above results, further analysis of the circulating-impedance and the feasibility study of droop control in this system are presented. The circulating-current analysis results of the advanced co-phase traction power supply system and the droop control of the system are given in the end of the paper.
Research about Dielectric Loss Detector Based on Frequency Conversion Method
Authors: Hua Guo Hua , Shen Zhong Ru
Published: August 2013

This paper adopts frequency conversion method to avoid same frequency interfered, and deduces the dielectric loss factor and the equivalent capacitance using the harmonic analysis. Based on this theory, a DSP+FPGA detecting platform was built. At last, utilizing capacitance and resistance to simulate as dielectric loss measurement sample, the experiment was conducted.
Research on Thermal Resistance of Power MOSFET Based on the Structure Function
Authors: Chao Xiao , Wang Li Xin
Published: August 2013

The research of thermal resistance, an important parameter for the thermal characterization of Power MOSFET device, is gaining increasing importance. Structure function, a novel and popular method, can be used to analyse the thermal characterization of Power MOSFET. In this paper, Wiener filter, a frequency-domain method of performing deconvolution that produces the structure function, is proposed. This method is applied to a Power MOSFET device in a TO-39 package. The thermal resistance of this Power MOSFET device was analysed from the structure function based on Wiener filter method.
HHT-Based Selection of Optimal Time-Frequency Patterns for Motor Imagery
Authors: Gong Ping , Chen Min You , Zhang Li , Jian Wen Juan
Published: August 2013

In this paper, a novel method based on Hilbert-Huang transform (HHT) is presented to select optimal timefrequency patterns for single-trial motor imagery electroencephalograph (EEG). The method comprises three progressive steps: 1) employ Empirical Mode Decomposition (EMD) method to decompose EEG signal into a superposition of components or functions called IMFs, and then apply Hilbert transform to the IMFs to calculate the instantaneous frequency and instantaneous amplitude; 2) select the IMFs including the most useful frequency components 3) the optimal timefrequency patterns can be selected according to the instantaneous frequency and instantaneous amplitude of the selected IMFs. After selecting the optimal timefrequency patterns, the features extracted by different methods are classified by Fisher linear discriminator. The results showed that the proposed method could improve the classification accuracy.
The Advanced Peak Cancellation Implement Method for OFDM Signals in CMMB
Authors: Liu Qian Hui , Wang Jian
Published: August 2013

High peak-to-average power ratio (PAPR) is one of the main disadvantages for OFDM signals, which will always result in low power efficiency of power amplifier. The peak cancellation method is a powerful PAPR reduction technique. In this paper, the advanced peak cancellation implement method (APC) is proposed for OFDM signals. Extensive simulations demonstrate that in comparison with the conversational peak cancellation implement method, the APC is more suitable for OFDM signals due to less iteration and comparative performance.
A Research on a Method of Error Separation Based on Wavelet Analysis
Authors: Yao Gang , Zhao Jian Jun , Sun Jing Jie
Published: August 2013

According to the error character of the systematic error and random error in calibration data, we put forward using wavelet analysis method to the process of separating error. We give the basic principle and method to dispose random error with Wavelet Analysis. When choosing the threshold, we use GCV(Generalized Cross Validation) principle. Then use IA to search the best value of GCV function and realize the separation simulation of random error in the MATLAB. During the selection operation of IA(Immune Algorithm), the expecting propagation probability is computed in order to guarantee the diversity of the colony and the robustness of algorithm. The results of simulation show that the combination of Wavelet Transform and IA can achieve the aim of separation and have some application prospect in this field.
The Design and Implementation of a Video Image Acquisition System Based on VFW
Authors: Wang Wei Hua
Published: August 2013

Along with the development of technologies on computer, electronic and communication, there are more and more applications of digital image acquisition and processing technology used in computer and portable systems, such as videophone, digital cameras, digital television, video monitoring, camera phones and video conferencing etc. Digitized image makes image digital transmit with high quality, which facilitates image retrieval, analysis, processing and storage. In applications such as video conferencing, it is a crucial premise to capture videos. So, in this paper, we mainly introduce the video capture technology by exploiting the VFM video services library developed by Microsoft. Software based on VFW can directly capture digital videos or digitize the traditional analog videos and then clipping them.
Maximum Average Correlation Height Filter Based on Pulsed Neural Network for Distorted Target Recognition
Authors: Li Xiang , Zhou Dong Ming , Nie Ren Can , Deng Hai Ying , Li Hong Mei
Published: August 2013

A novel method for image recognition using Pulsed Coupled Neural Network (PCNN) based on Maximum Average Correlation Height (MACH) filtering is proposed. Firstly based on the property of synchronous pulses oscillation for the similar group of neurons in PCNN, segment image to extract edge information, and this effectively suppresses noise. Subsequently the synthesized MACH is adopted to excellently realize the distorted target recognition using appropriate filter parameters depending on different targets. The simulations results show that the output correlation peak is obvious, and validate the effectiveness and accuracy of the method for distortion target recognition.
Multi-Layer and Adaptive Edge Detection Method Based on Multi-Scale Gabor Wavelets
Authors: Dong Xia Bin , Huang Xin Sheng , Xu Wan Ying , Shen Lu Rong
Published: August 2013

Recent years, the common adaptive edge detection algorithms use merely the global character of images, and the local character is ignored. The lack of image information always leads these algorithms are difficult to detect the low contrast edges and sensitive to asymmetric illumination. A novel adaptive edge detection algorithm is proposed to improve the edge detection performance. First, the original image is filtered to obtain the edge response image by introducing multi-scale Gabor filters. Second, non-maxima suppression technique is used on the edge response image to get the coarse edge points. Then, the edge response image is delaminated to adaptively select different thresholds towards different pixels of different layers according to pixels local mean and variance values. The fine edge points are got after filtering the edge response image with these thresholds. Finally, combine the coarse edge points and fine edge points together and get the final edge. Experimental results show that the proposed algorithm achieves lower contrast edge detection and robustness to asymmetric illumination, has better edge detection performance.
Detection and Reconstruction for LFM Echo Signal Based on Blind Compressed Sensing
Authors: Fang Biao , Huang Gao Ming , Gao Jun
Published: August 2013

A novel framework of sub-Nyquist sampling and reconstruction for linear frequency modulation (LFM) radar echo signal based on the theory of blind compressive sensing is proposed. This mechanism takes LFM echo signals as a sparse linear combination under an unknown order p of fractional Fourier transform (FRFT) domain. Firstly, make use of good energy concentration of LFM signal in proper FRFT domain to determine the optimal order, which meets the convergence conditions. Secondly, construct DFRFT basis dictionary according to the specific sparse FRFT domain dominated by p. To reconstruct the sources, the simple orthogonal matching pursuit (OMP) is chosen with less data storage and lower computational complexity. Finally, simulations are taken on testing the proposed framework, realizing the undersampling and reconstruction without the knowledge of priori sparse basis for LFM radar echo signals, and the results are provided to verify the feasibility and efficiency of the novel method.
Robust H∞ Control for Uncertain Discrete Networked Control Systems
Authors: Chen Long , Qu Bai Da
Published: August 2013

This study is concerned with the robust H control for a class of uncertain discrete Networked Control Systems (NCSs). The NCSs with bounded network-induced delay and data packet dropout are modeled as closed-loop systems with time-varying input delay. By using new Lyapunov-Krasovskii function and combining Jessen inequality and reciprocal convex technique, a sufficient condition which asymptotically robust stabilizes closed-loop systems and satisfies H performance index is derived. This study needs fewer Linear Matrix Inequality (LMI), compared with the existing literature. Therefore, the result obtains lower conservativeness. Finally, the robust H controller is obtained with an improved cone complementarity linearization (ICCL).Simulation results show the effectiveness of the proposed method.
Efficient Multi-Target Tracking Based on Meanshift and PNN
Authors: Wang Zhi Ming
Published: August 2013

Multi-target tracking is one of the basic and difficult tasks in video analysis and understanding. This paper proposed an efficient tracking algorithm based on meanshift algorithm and PNN (Probability Neural Network) background model. Firstly, PNN detection results were used to initialize targets for meanshift tracking. Secondly, in the succeeding frames, every target was matched to detected regions before tracking. At last, only targets which couldnt match with new regions need tracking with meanshift tracking algorithm. Experimental results show that mean search steps for every target were dramatically reduced compare with original mean shift tracking algorithm.
The Feature Extraction and Matching Algorithm Based on the Fire Video Image Orientation
Authors: Lu Ying , Wang Hui Qin , Xu Fei , Liu Wei Guang
Published: August 2013

Because the SIFT (scale invariant feature transform) algorithm can not accurately locate the flame shape features and computationally intensive, this article proposed a stereo video image fire flame matching method which is a combination of Harris corner and SIFT algorithm. Firstly, the algorithm extracts image feature points using Harris operator in Gaussian scale space and defines the main directions for each feature point, and then calculates the 32-dimensional feature vectors of each feature point descriptor and the Euclidean distance to match two images. Experimental results of image matching demonstrate that the new algorithm improves the significance of the shape of the extracted feature points and keep a better match rate of 96%. At the same time the time complexity is reduced by 27.8%. This algorithm has a certain practicality.
Variable Window Stereo Matching Based on Phase Congruency
Authors: Guo Long Yuan , Sun Chang Yin , Zhang Guo Yun , Wu Jian Hui
Published: August 2013

The major challenge in area stereo matching algorithms is to find appropriate window size and shape. Phase congruency is robust to noise and can reflects the gray changes. With these benefits, the paper first detects image and determines pixels characteristics according to phase congruency. Then, different window will be used to matching according to different feature pixels. After using cost function which combined with non-parametric measure and gray value, the final disparity map will be obtained. The result of experiment indicates that the algorithm can generates more accurate disparity map.
Bone Repair with Compressive Sensing Based on MRI
Authors: Zhou Feng , Pei Yi Jian , Wu Hao , Chen Zhi Jun
Published: August 2013

With the development of society, much technology has been invented, many problems have been conquered. But it is still very hard for medical science. For example, physicians usually obtain the lesion information by means of medical imaging equipment and computer visualization techniques, to judge the symptoms, and develop appropriate treatment programs. However, it is hard for Magnetic Resonance Imaging (MRI) equipment to get high-quality image of the lesion, and then extract the pathological features of high quality. This paper will introduce a method to overcome this tough stuff. This paper attempts to adopt compressed sensing technology for image processing in the bone repair process. Lesion images are first acquired via MRI, then with the wavelet transform, to get the sparse matrix by the wavelet coefficient sparse representation. The method can obtain compressed images, and extract the corresponding pathological features without reducing the image quality.
Remote Attendance System Based on RFID
Authors: Zhong Bo Cheng , Shen Yi Jun
Published: August 2013

Radio Frequency Identification (RFID) is an automatic identification technology that can identify the objects at a distance.This paper presents the design of remote attenance system based RFID. The system is implemented for the automation of time and attenance using a new mode of barrer-free channel. With a simple setting, the attendance system is capable of recording real time attendance, counting attendance and attenance statistics analysis. Reports and charts will be provided for the top management to make decision, annual review, and planning on man power. The applied result of the system shows that it is simple and effective.
Research on the Establishment of Psychology Teaching Mode Based on IT Multidimensional Interaction
Authors: Li Shang Hong
Published: August 2013

with the rapidly development of modern education, the degree of integration of information and modern education has been strengthen continually. The new education model of information technology and modern education is related with traditional education. They are complete and mutually promote in the teaching process. This paper analyzes the basic connotation of psychology teaching. Based on the principle of teaching and research mission of the psychology, this paper profiles psychology teaching feedback and coupled revelation of information communication model. This paper establishes psychology teaching multi-dimensional interactive model of the IT environment using the qualitative analysis method. This paper determines the effectiveness of teaching effectiveness through the effectiveness of the computer information entropy which provides a theoretical basis and practical guidance for the psychology teaching reform and innovation.
The Efficiency Analysis of R&D Activities for Listed High Technology Enterprises in Western China
Authors: Ma Zhan Xin , Li Ping Ping , Yi Ru
Published: August 2013

in order to understand the use of research and development resources of high-tech enterprises in western China, the research and development efficiency evaluation index system is built from the research and development expenditures, research and development personnel, profitability, development ability and technological innovation ability in this paper. DEA method is applied to evaluate the relative research and development efficiency of 27 listed high-tech enterprises in western China. Empirical results show that the overall level of all samples is not high, and most of the enterprises are in inefficiency stage. There is direct proportion between size of assets and R&D efficiency for enterprises.
Risk Assessment of Cascading Failure Based on Serious Failure Analysis
Authors: Tu Wen Wen , Zeng Yuan , Li Peng , Huang He
Published: August 2013

Based on the theory and methods of early evolution rule of cascading failure, the paper puts forward a kind of cascading failure selection and risk analysis method basing on the system failure severity, which can availably take consideration of the interplay of the before and after fault as well as the cumulative effect between successive failures. IEEE RTS-79 system is taken as an example to illustrate the effectiveness of the algorithm.
Research on Competitive Strategies of Telecom Operators in Post-3G Era Based on Industry Chain Value Stream
Authors: Zhong Wei , Wang Jian Ming , Zhang Yang
Published: August 2013

This paper systematically analyzes the evolution of telecom industry chain, and builds a telecom industry chain value stream model. Besides, the article presents a competitive strategy model of telecom industry chain, which is based on the telecom operators perspective on maintaining the dominance in the chain.
The Application and Research of Warehouse Information Intelligent Management Based on Cloud Computing
Authors: Li Chao Lin , Shi Hui
Published: August 2013

With the advancement of intelligent management of modern society, all involves mass data controll, implementation and operation for various types of intelligent management system. Cloud computing makes it possible to deal with these mass data operation , as well as turn the application of cloud computing into intelligent information management in warehouse managemet information system. In this paper, through the detailed analysis of the structure of the warehouse management information system of the functional requirements, taking advantage of the organic combination of different information technology of cloud computing and four function modules, so that the warehouse information management operates and develops more intelligent and effective, opening up new ways to achieve the intelligent management of warehouse information.
Research on the Coupling Relationship of Cognitive Scheme between Ba Culture and ESP Driving Safety System
Authors: Zhang Si You , Wang Chang Ying
Published: August 2013

In Chinese, there are two meanings of the character Ba. One meaning is a reference, which refers to the leaders of Governors alliance in ancient China. Another meaning is the verbalization of a noun, which means Ba by power and violence. With the development of automobile industry, the more cars on the street, the lower of the cars price. Under the influence of divers psychological factors, road hogs appear frequently when overtaking and traffic jams happen. These uncivilized phenomena would give rise to serious jams and traffic accidents. This paper has a research on the phenomena and features of drivers psychological factors of road hog under the above Background. Consequently, ESP Driving Safety System is designed. Employing fuzzy control principle, this system realizes the interaction between drivers and ESP. ESP restrains psychological factors of road hogs successfully and it is the giant of safety driving system.