bluuebunny/crossref_metadata_2025 huggingface dataset:
A Novel Channel Estimation Method Based on Power-Delay Profile
Authors: Yu Ying Xin , Wang Gang
Published: August 2014

Considering the physical layer specification of the IEEE802.11 protocol as background, a novel LSE (least square estimation) algorithm based on power-delay profile of wireless channel is proposed. In multi-path time-variant channel, receiver carries out a primary MMSE estimation using training symbols and pilots of OFDM symbol firstly. Then the channel impulse response is obtained from frequency response estimated by MMSE. Finally, LSE algorithm is applied to revise the channel impulse response according to the power-delay profile. The LSE algorithm can reduce the noise level of MMSE estimation in time-domain which is equivalent to increasing the SNR to the output of 2-D wiener filter. Simulation results confirm that the proposed LSE algorithm gains a better performance in contrast to MMSE algorithm. As the Doppler frequency shift increases, LSE outperforms more significantly than MMSE algorithm.
Research and Design of Urban LED Street Lamp Wireless Management System
Authors: Cui Meng , Qi Yu Lin
Published: August 2014

This article will Wave Mesh wireless ad-hoc network technology is applied to urban LED street lamp management system,with the single chip microcomputer 80C51F310 as the core,using real-time sensor testing environment brightness, and according to the brightness level of brightness, the LED street light illumination automatic adjustment;Aiming at the condition of the midnight staff less activity,using pyroelectric infrared human detection to control the brightness of the street lamp, the experimental data proved that energy saving effect is remarkable.The system safe and reliable, low cost,It has the advantages of single lamp remote monitoring,automatic dimming,electric energy measurement,alarm,fault diagnosis and fault location,etc.
Multi-Objective Optimization Model of Wind Farm and Pumped Storage Power Station
Authors: Sheng Si Qing , Sun Xiao Xia
Published: August 2014

This paper presents a multi-objective optimization model to solve the volatility and anti load characteristic of wind power. The pumped storage power station is introduced in this paper. Though pumping and watering, the pumped storage power station can cut peak down to smooth the wind power. Given to the economical efficiency of wind farm, operation efficiency of the wind storage joint system is investigated. In order to improve the wind rate, minimize abandon wind is employed in objective function. To demonstrate the effectiveness of the proposed model, a practical example is tested. The result shows that this model is feasible and effective.
Analysis of Heavy Metal Pollution in Used Electronic Products Recycling Area
Authors: Chai Yan Fang , Chen Hong Han
Published: August 2014

The biggest used electronic products recycling area in China has accelerated the economic development of the local area, however, it also has caused severe damage to the ecological environment, and posed great threat to the local residents, for which heavy metal pollution bears the most responsibility. Based on sampling of soil in researching area and principal component analysis, we found that the elements Ni, Cr, Zn, Cu, Pb and Cd were from man-made pollution sources, and that the elements As and Hg were not correlated with other elements, and were from independent pollution sources.
The Status and Challenges of Multi-Processor System-on-Chip’s Formal Verification
Authors: Tang Lin , Wu Jin Zhao
Published: August 2014

With the continuous advancement of processor manufacturing process as well as the exposed limitations of single-core Processors, Multi-Processor System-on-Chip (MPSoC) has become the inevitable outcome of the technological development and practical application needs. It is used to meet the requirements of multitasking, multifunctional and high performance computing. With the improvement of chip complexity, verification module also increases exponentially. Verification of MPSoC is becoming Bottleneck in the process of chip’s design. So this paper first introduces the origin of MPSoC, and analyzes developing tendency of its verification. And then, the theory and main challenges to the formal verification of MPSoC are discussed. This paper will provide support for building the verified theory method and technology that can meet the demand of MPSoC design, and Developing MPSoC high-level architecture design verification technology.
Simulation Research on Influence of SVC Switching Overvoltage on Phase Controlled Reactor
Authors: Li Jun Min , Li Jiang Tao , Yu Xin , Wang Shu Han , Wu Si Cong
Published: August 2014

In recent years, 66kV vertical TCR-type SVC was put into operation in several transformer substations at home. Compared to the compensation mode of the conventional 35kV SVC which is connected to 66kV busbar through by way of step-down transformer, the vertical compensation mode has the advantages of low loss and small maintenance amount. However, it is found that damage of phase controlled reactor in TCR happens in several scenes, and the technicians and research institutions studied this problem from such aspects as phase controlled reactor manufacturing process, SVC control strategy and natural environment of the transformer substations and obtained their own conclusions. This paper uses PSCAD software to conduct a simulation research on the 66kV vertical SVC system installed on a 220kV transformer substation at home and concluded that the SVC switching overvoltage might be the direct cause leading to damage of phase controlled reactor.
Study of Electron Beam Space Charge Effect of Electrostatic Focusing
Authors: Wang De
Published: August 2014

The influence of space charge in the space electron beam focusing system is introduced.Then charge-quantity distribution method which is used to calculate the density of space charge and the Computer Aided Design (CAD) method are put forward The result by programming calculation shows that the method is correct.
Analysis on Galloping Responses of Transmission Tower-Line System
Authors: Di Yu Xian , Zhu Kuan Jun , Liu Bin , Liu Long , Liu Cao Lan
Published: August 2014

Nonlinear finite element model of a transmission tower-line system was set up and galloping of iced bundle conductors in the system was numerically simulated by means of ANSYS software. Based on galloping trajectories, vibration frequency, galloping order, conductor tension; unbalanced tension characteristics of iced conductors, it was shown that values of the conductor amplitudes by the tower-line system model are increased by 20% compared to the conductor model. The values of the strain tower unbalanced tensions by the tower-line system model are decreased by 20% and the values of the suspension tower unbalanced tensions by the tower-line system model are decreased by 62.5% compared to the conductor model conductor-insulator mode1. The galloping order is different for different span, due to the impact of the order of galloping. The amplitude of the vertical galloping is increasing while the increasing span, but it is not linear increase.
Research and Analysis of Clinical Application of Intelligent Low Temperature Plasma System
Authors: Liu Zhi Bin , Mao Xiao Bo
Published: August 2014

According to the requirements of general surgical operation, we designed the plasma therapy system which took the microprocessor as the control core based on medical low temperature plasma technology. Making use of High-frequency AC electric field exciting ions in the electrolyte can generate low temperature plasma. Conclusion: the low-temperature plasma therapy system can significantly reduce blood loss and length of incision, shorten operating time, and postoperative complications in general surgical operation.
Research on Spectral Data Acquisition System
Authors: Yu Li Ge
Published: August 2014

This paper introduces a kind of spectral data acquisition system based on the linear CCD. The spectral acquisition circuit, data conversion and storage circuit were designed. The synchronization of the spectral data acquisition, data conversion and storage were achieved using VHDL. Finally, the spectrum contained noise is processed by the wavelet denoising theory. The experimental results show that the proposed scheme is feasible.
A BGP Fast Convergence Mechanism Based on Doubtful Path Judgment
Authors: Yu Chao , Wang Xing Wei , Huang Min
Published: August 2014

The stability of Border gateway protocol (BGP) are directly related to the performance of the Internet. However, experiments show that BGP has serious slow convergence problem and its performances cannot meet communication needs well. Thus, a BGP fast convergence mechanism based on doubtful path judgment is proposed in this paper. Firstly, by analyzing the relationships between failure paths, doubtful paths containing failure links are computed. Secondly, a policy of doubtful path validity inquiry and its corresponding messages are designed to avoid computing wrong doubtful paths while multiple links fail simultaneously. Meanwhile, in order to avoid the waste of network resources caused by the policy, a finite state machine is designed to handle nodes’ state transitions. Finally, doubtful paths are suppressed to take part in routing decisions in the stage of BGP path exploration and the fast convergence is achieved. The mechanism is implemented on the prototype system, and its validity and practicability are tested. Experiment results show that the mechanism is feasible and effective.
Convergence Analysis of a High Order Schema for the Ordinary Fractional Diffusion Equation
Authors: Cao Jun Ying , Wang Zi Qiang
Published: August 2014

The block-by-block method extended by Kumar and Agrawal to fractional differential equations. Cao et al. proposed a high order schema which is based on an improved block-by-block approach, which consists in finding 4 unknowns simultaneously at each step block through solving a 4 × 4 system. We rigorously analytically prove that this method is convergent with order for , and order 6 for .
A Hierarchical Algorithm for Mobile Ad-Hoc Networks
Authors: Yang Juan , Zhang Zhi Jun , Luo Jian Lu
Published: August 2014

For mobile ad hoc networks, hierarchical algorithm can reduce communication relay and enhance the QoS of MANETs. In this paper, A hierarchical algorithm-FGM algorithm is proposed. This algorithm based on dynamic node’s Multi-feature fusion and Gibbs Random Field—Maximum a Posterior. The simulation results verify the effectiveness of the algorithm.
A Constant Envelope OFDM Signal Generation Algorithm Based on Frequency Domain Noise Shaping
Authors: Gu Qing Shui , Wei Chen
Published: August 2014

Presents a OFDM signal generation method which transforms general OFDM signal to constant envelope signal. Through out-of-band of original OFDM signal insertion synthetic noise signal, the composite signal in time domain is constant envelope, and in in-band can achieve a high signal-to-noise ratio. Simulations show that the method can be used in OFDM system to improve the efficiency of power amplifier. Simulations show that the method does not need too high sampling rate, at the same time there is no stability problems, compared to the high efficiency power amplifier based on time-domain Sigma-Delta modulation technology.
Research on Algorithm to Improve Performance of Fluid-Assisted Polishing
Authors: Wan Shao Song , Cao Jian , Yan Cong
Published: August 2014

In present work, the distribution of electric field strength on the surface of work piece was analyzed through ANSYS and theoretical equation. Moreover, the attractive force acting on particles that disperses in ER polishing fluid was calculated. A series of basic experiments were conducted, it is aimed to find out the effective process parameters on the surface roughness using the work piece as electrode. Vehicle handling directional stability has been more and more important, experiments for steering wheel corner step input response, steering oil tank response property, steady state turning and steering angle of all steering wheels were conducted in this paper, the experimental results show that multi-wheel steering system can fulfill its function very well and reach target angle, it provides a new method for researching for the vehicle handling directional stability.
Research on Stall Aerodynamics Modeling Based on WNN Trained by AFS-PSO Hybrid Algorithm from Flight Data
Authors: Gan Xu Sheng , Tang Xue Qin , Gao Hai Long
Published: August 2014

To accurately depict the dynamic characteristics for aircraft stall by aerodynamic model, a Wavelet Neural Network (WNN) stall aerodynamic modeling method based on Particle Swarm Optimization (PSO) algorithm and Artificial Fish Swarm (AFS) algorithm is proposed. Numerical examples show that the proposed method has a good prediction precision, and it is also effective and feasible to build the aerodynamic model from flight data for aircraft stall.
Incidence Coloring Number of Some Join Graphs
Authors: Dong Gui Xiang , Liu Xiu Fang
Published: August 2014

The incidence coloring of a graph is a mapping from its incidence set to color set in which neighborly incidences are assigned different colors. In this paper, we determined the incidence coloring numbers of some join graphs with paths and paths, cycles, complete graphs, complete bipartite graphs, respectively, and the incidence coloring numbers of some join graphs with complete bipartite graphs and cycles, complete graphs, respectively.
Image Transmission Based on QC-LDPC Codes with Simple Recursive Encoding Form
Authors: Xu Hua
Published: August 2014

Low encoding delay and complexity is very important for image transmission. This paper proposes a novel image transmission scheme with low encoding complexity. The proposed scheme is based on quasi-cyclic low density parity check (QC-LDPC) codes with a simple recursive encoding form (SREF QC-LDPC code) which results in low encoding complexity and delay. Constructing the SREF QC-LDPC codes in this scheme composes of two main steps, construction of the base matrix and the exponent matrix. We combine the differential evolution and protograph extrinsic information transfer (PEXIT) method to optimize the base matrix of QC-LDPC code. Consequently, the exponent matrix and the parity check matrix are constructed. Simulation results show that the proposed scheme based on SREF QC-LDPC code can provide a good tradeoff between the performance and complexity.
The Simulation of English Character Encryption Encoding Optimized Communication Model
Authors: Zhang Fang Fang
Published: August 2014

In order to enhance the security of the English character document, data-level information security issues have been researched on the English characters document. Use object-oriented programming to get the character information in English characters document and also get the encoding. Use the “long key stream” algorithm to encrypt. During the process of encryption and decryption, the lossless of English characters file format information is maintained. Also, the setting of encryption and decryption is introduced. English characters document which use this encryption method cannot be cracked illegally. Research on this simulation model guarantees the information safety of English characters document on bottom-level.
Research on the Programming of Calculation and Analysis of the Improved Finite Element Method Based on Matlab
Authors: Jiang Lei
Published: August 2014

Matlab tools are used to improve the programming in the process of calculation and analysis by adopting the continuous and discrete numerical methods developed in modern times with the variational principles and the subdivision interpolation as the basis, so as to implement the finite element analysis of the module, which is one of the most important method to solve the calculation and analysis in the calculation of complex engineering by finite element method. Firstly, according to the development of finite element method, and the characteristics of point process, we analyze the fundamental characteristics of the finite element method. On the basis of this, combined with the Matlab visual programming GUI component, we has designed the improved calculation and analysis programming of finite element method. In order to verify the rationality of the process, triangular unit division method is used to carry out the empirical analysis. And the results show that this method is effective, and has very strong practicability.
Research and Analysis of Data Mining Based on Clustering Algorithm
Authors: Lu Guo Sheng , Wang Chen Sheng , Yang Hai Lu , Zhao Li Chang
Published: August 2014

Data mining is the frontier research topic in the field of information processing and database technology, is recognized as one of the most promising key technologies. Data mining is a collection of statistics, machine learning, database, pattern recognition, artificial intelligence and other disciplines, which is a new inter-discipline. Data mining put more emphasis on discovering implicit knowledge in huge amounts of data and the scalability of the algorithm, and is a technology very close to the actual use, with high technical content, bigger implementation difficulty.
MADM and Rank Similarity-Based Network Selection Algorithm in Heterogeneous Networks
Authors: Zhu Xue Wen , Zhu Qi
Published: August 2014

In order to provide better service for the users, this paper put forwards a new algorithm for network selection. Firstly, the algorithm acquires weights’ vectors by analytic hierarchy process (AHP), G-1, entropy weighting method (EW) and variable coefficient (VC). Then combine the weights’ vector according to the similarity of different methods. Finally select the target network with the best performance. The simulation results show that the proposed algorithm can provide subscribers with better quality of service.
Research on a New Type of Multi-Link Variable Compression Ratio by Interpolation Algorithm of Zadoff-Chu Sequence
Authors: Cao Jian , Ma Hai Ying , Li Gang
Published: August 2014

Compared with the traditional multi-link and variable compression ratio mechanism, the new engine had compact styling and lower designed costs. There are many factors that can affect the engine network performance, such as delay, packet loss and capacity utilization. Application examples show that, this system can significantly improve the efficiency of aerodynamic design. Compare the kinematics function with the new design with the prototype 250 engine and the traditional multi-link and variable compression ratio mechanism by using the virtual simulation software MSC-Adams. The contrast result suggested that the new design had higher combustion efficiency and charging efficiency than the prototype engine.
Interpolation Algorithm Application to New Ultra-Precision Polishing Instrument
Authors: Wan Shao Song , Cao Jian , Yan Cong
Published: August 2014

This paper presented the key techniques development of motor/generator (M/G) for the FES system in recent years, and summarized the latest developments of three machines such as: induction machine (IM), reluctance machine (RM) and permanent magnet machine (PMM) including traditional structure PMM and Halbach structure PMM, which now widely used in the FES system. Ultra smooth surface polishing techniques are the important part in the ultra precision machining system. The new ultra-precision polishing instrument which fit for the precision polishing in the elbow’s internal surface has been researched in this paper. The polishing instrument is a sphere which performs rotating-jet polishing and flexibly dragged by the string. The simulation result has proved that the polishing instrument can polish the internal surface of the elbow and achieve the purpose of the improving roughness of the internal surface.
A Study on Public Satisfaction of County Electronic Government Affairs: Taking Linzhang County in Hebei Province for Example
Authors: Qi Zhi Juan , Sun Gui Ping
Published: August 2014

With the thorough development of electronic government affairs , the key point of the study has been the electronic government affairs in the county regions. This paper will start with the characteristics of electronic government affairs in the county regions , grasp the core of electronic government affairs which is taking the public as the center, and put forward an evaluating model of public satisfaction in county electronic government affairs. Then with the basis of this indicator , a questionnaire survey will be conducted. And finally with the practical data , the AHP method will be adopted to carry out an empirical study on public satisfaction of electronic government affairs.
Simulation Analysis of the Seal Plate in the Composite Slurry Valve Based on ANSYS
Authors: Wu Jie , Wang Jia Quan , Wang Dong Zheng
Published: August 2014

The composite slurry valve is applied widely in the high pressure mud shipping tube because of maintenance easily and disassembly. Composite slurry valve plays a vital role, which combined application is more; ram is one of the important components of composite slurry valve. But deflection is easy to occur in the seal plate of the composite slurry valve, so as to make sealing failure. This article mainly aims at the seal plate has carried on the design and analysis, finite element modeling, and study the corresponding constraints, in the process of loading method. It is very important to improve structural design and performance of entity modeling and finite element analysis of the gate valve. Aiming at present situation and development trends of CAD and CAE technology of oil field gate valve, using Sold Works and ANSYS software seamless link, three dimensions modeling to the gate valve, virtual assemble and finite element analysis were carried out successfully. According to the analysis result, the improvement scheme based on the theory analysis was put forward, thus offering the theoretical basis for the whole structural optimization design and performance improvement of the gate valve.
Comprehensive Evaluation of Low Carbon Economy Based on Rough Set Theory
Authors: Chen Cang , Liu Hai Sheng
Published: August 2014

Rough Set Theory is a mathematic tool which mainly deals with the uncertain knowledge. In this paper a new comprehensive evaluation model of low carbon economy based on rough set is formed. At last, the results of comprehensive evaluation of low carbon economy of 6 provinces based on this model are obtained which show this method is effective and feasible.
A Study of Path Planning Algorithm in VANETs
Authors: Zhang Ling
Published: August 2014

Based on GPS and RFID technology, a vehicle path planning guidance system is analyzed in this paper. Specially, the ant colony optimization in the vehicle path planning application of Internet in vehicles environment is proposed, and an improved strategy is put forward to provide an efficient path planning algorithm for the construction of intelligent transportation system. As an alternative of wireless radio and guidance display screen and other primary induction means, the ant colony optimization in this work could supply some significant exploring and thinking for currently construction of the intelligent transportation system.
On PSO Based BP Neural Network
Authors: Hu Peng , Song Xiao Quan
Published: August 2014

Particle swarm optimization (PSO) based BP neural network is introduced , which is superior to the traditional BP neural network . The traditional BP neural network and PSO algorithm is illustrated respectively, and introduces how to apply PSO algorithm in BP neural network. The numerical simulation proves that PSO-BP neural network performs better than traditional BP neural network.
Overview of PeneloPET: A PET-Dedicated Monte Carlo Simulation Toolkit
Authors: Liu Hao Jia , Zhao Shu Jun
Published: August 2014

PeneloPET is a PET-dedicated Monte Carlo simulation toolkit, which is based on PENELOPE. This article describes the characteristics and the general process of PeneloPET simulation. Then we compare the simulation results of PeneloPET and GATE to model the GE Healthcare eXplore Vista microPET system respectively, including sensitivity and noise equivalent count rate. The results show that PeneloPET simulation data corresponds with the data from real scanners and GATE simulation, and proves PeneloPET is an accurate toolkit for PET simulation.
Novel APAM Projectile Firing Data Algorithm Using Firing Table Fitting Method
Authors: Shu Xin , Lou Wen Zhong , Lu Yu Fei , Yin Long , Jin Xin , Guo Ming Ru
Published: August 2014

This paper establish a firing data calculation algorithm for the novel anti personnel / anti materiel multipurpose projectile (APAM), and the simulation results demonstrate the validity of the algorithm. The algorithm highly compatible with tank. The algorithm has very fast calculation speed, low requirement for hardware. The algorithm is helpful to improve the firing rate of the tank, reduce the equipment cost of new ammunition system.
A Modified Differential Evolution Algorithm for Numerical Optimization Problems
Authors: Xia Hong Gang , Wang Qing Zhou
Published: August 2014

To efficiently enhance the global search and local search of Differential Evolution algorithm ( DE), A modified differential evolution algorithm (MDE) is proposed in this paper. The MDE and the DE are different in two aspects. The first is the MDE Algorithm use a strategy of Pitch adjustment instead of original mutation operation, this can enhance the convergence of the MDE, the second is integrate the opposed-learning operation in the crossover operation to prevent DE from being trapped into local optimum. Four test functions are adopted to make comparison with original DE, the MDE has demonstrated stronger velocity of convergence and precision of optimization than differential DE algorithm and PSO.
An Improved Variable Step Size LMS Algorithm Based on Sigmoid Function
Authors: Liu Li , Wang Qiong , Bai Hong Ping
Published: August 2014

LMS (Least Mean Square) algorithm performance is analyzed. Then something has been done on SVSLMS that is an improved variable step size LMS algorithm based on sigmoid function. The improved algorithm has faster convergence rate, stronger channel tracking capability, better anti-noise performance and steady-state error performance compared with SVSLMS, for it makes parameters and change with channel characteristics. Theoretical analysis is the same as computer simulation results, which proves that the performance of the improved algorithm is superior to SVSLMS algorithm.
An Evaluation Method of Node Importance in Complex Network
Authors: Sun Rui , Luo Wan Bo
Published: August 2014

The evaluation of node importance is a very meaningful research in complex networks. This paper analyze the characteristics of complex network and consider the effects of nodes for the evaluation of node importance, introduces the idea of data field in theoretical physics and establishes the evaluation method of node importance based on topological potential in complex network. Through the theoretical and experimental analysis, it is proved that this method can evaluate the importance of node in complex network in a fast and accurate way, which is significant both to theory and practice.
Study on Equipment Quality Monitoring Information Transmission System Based on BeiDou Navigation Satellite System Short Message Communication
Authors: Deng Da Quan , Li Wan Lin , Chen Yan , Zhao Fang
Published: August 2014

Because the equipment management of wide geographic distribution and it is difficult to obtain real-time equipment quality status for the equipment management system. The system built a quality monitoring and management system of distributed equipment, formed the command and data exchange network based on Beidou satellite system, achieved the timely transmission of information quality monitoring equipment, accurated grasp equipment status, realized the equipment safeguard informatization, accurated security provides the means to support.
Study on IIR Adaptive Frequency Estimator in the Multi-Frequency Estimation
Authors: Zhu Dong Xu , Zhi Jiu Ying , Fu Gang
Published: August 2014

Propose a use of IIR adaptive frequency estimator to achieve multi-frequency estimation algorithm. Analysis IIR filter characteristics, indicating that the second-order IIR model has a single peak characteristics, to achieve stable convergence; while the higher-order IIR model polymorphic, so the need for the estimated parameters are initialized. More traditional phase locked loop algorithm, which has no mixing components, to achieve the advantages of full-band frequency estimation, frequency estimation accuracy under the same environment and phase locked loop fairly.
6σ and 6 Sigma Management
Authors: Hu Xiao Ming
Published: August 2014

This article introduced the 6 sigma management and 6 sigma level. The key point is to explain 3.4DPMO how to calculate. And,it also introduced the important means of six sigma management. At last,it shows the application of six sigma.
Research on Periodic Punctured Binary Complementary Sequence Pair Set
Authors: Gao Jun Ping , Li Qi , Zhang Yan
Published: August 2014

A new discrete perfect signal named periodic punctured binary complementary sequence pair set is proposed. Several construction methods are proposed, such as using perfect punctured binary sequence pair or array pair, column orthogonal matrix, mate set interleaved operation, and periodic production methods etc. More periodic punctured binary complementary sequence pair sets could be generated through these methods. Research results show that it has wider existent scope and could be applied in engineering as a kind of perfect signal with good correlation properties.
Theory of Cylindrical Gas Film Seal
Authors: Chen Tao , Liu Mei Hong
Published: August 2014

This paper mainly introduces the related theory and method of cylindrical gas film seal, the structure and principle of the cylindrical gas film seal, and solving the mathematical model, introduces several methods commonly used for solving the gas film pressure, and compare these methods, get the applicable conditions and calculation error of these methods.
Study and Implementation of Mobile Information Service System for Agriculture Based on Things
Authors: Luo Wei , Chen Ya Hui , Ye Ji Hua
Published: August 2014

With the rapid development of mobile networks and networking technology, agricultural information services will change in the concept, content, patterns and so on. This paper analyzes the existing agricultural information services, mobile information services to build the mobile information services system for agriculture based on android platform can provide the supply and demand of agricultural products in a timely and implement the efficient flow of agricultural information. Users can get more friendly and convenient user interface localized modes of operation than WAP pages through the system, users can obtain real-time mobile service information. Description of the experimental system is feasible in practice.
Design of Body Sensor Network Intelligent Terminal Network Communication’s Method
Authors: Song Chuan Zhen
Published: August 2014

To meet the needs of Body Sensor Network (BSN) intelligent terminal remote communication ,the scheme of network communication design in the Android intelligent terminals is provided .And combined with the characteristics of Android ,the method of Android network communication’s development is discussed .Firstly ,the architecture of intelligent health-cloud system and Android’s framework are introduced .And then the HTTP ,Web Service and other means of communication in Android are analyzed. Finally, a model of network communication in the intelligent medical is constructed and network communication in the intelligent terminal is carried out .The results show that Android can effectively take control of network communication in the BSN’s intelligent terminal and it has practical value.
Temptation to Defect May Promote Cooperation in Prisoner’s Dilemma Game
Authors: Pan Qiu Hui , Jia Jia Lin , Jiang Kun , He Ming Feng
Published: August 2014

In this paper, basing on the prisoner’s dilemma model proposed by M.A.Nowak, we present a model to research the action of temptation to defect in prison’s dilemma model. Firstly, we determine whether a player changes its strategy depends on a Fermi equation which is related to the payoffs of the player and its neighbors. If the player changes its strategy next time step, it will select the strategy adopted by the one who gets the highest payoff among its neighbors as its own strategy. Form the results we find that when four neighbors are considered, the density of cooperators will present a downtrend. Well, when eight neighbors are considered, the density of cooperators will decline at the beginning and increase suddenly afterwards. When twelve neighbors are considered, if the density of cooperators is reduced to zero, cooperation will appear again. Thus, the increase of temptation to defect may promote cooperation.
Research on Verification Method of OpenGL Simulated Image Based on Camera Calibration
Authors: Gao Teng Fei , Zeng Zhao Yang
Published: August 2014

OpenGL can correctly simulate real photogrammetric imaging by setting reasonable parameters. It’s an important tool to achieve the simulation of real three-dimensional object or scene imaging to two-dimensional CCD (Charge-coupled Device) plane. However, the images are lack of reliability verify. To solve this problem, we propose a method that can verify OpenGL simulated images on the basis of analyzing OpenGL image-forming principle. Firstly, the checkerboard images of different positions are taken by real camera and intrinsic and external parameters are calibrated. Subsequently, we use OpenGL to produce the same intrinsic and external parameters of checkerboard image by setting correct parameters. Finally, the simulated and real images’ matching point pair RMSE value is calculated based on Harris operator. By comparison, the validity and reliability of OpenGL simulated images are verified by some numerical simulation.
Prony Algorithm's Application on Extracting the Parameters of the Power System Transient Fault
Authors: Yan Jun , Lan Yong Wen , Fang Wei , Hou Xu , Mei Jing Cheng
Published: August 2014

The essay describes the basic principles and the method of application of prony algorithm, as well as how to use prony algorithm to fit fault signal and extract the corresponding transient parameters. And on this basis, the order of the signal model, the data window length, sampling interval and the parameters such as attenuation factor are determined. Then, the correctness of the prony algorithm is verified by the means of extracting of the small current grounding fault transient component.
Methods for Digital to Analog Conversion of Arts Image Fusion Based on Multimedia Technology
Authors: Wang Fang Li , Wu Jun Fang
Published: August 2014

Fine arts, in recent years, with the rapid development of information technology, its diverse artistic expression trends to be more obvious, at the same time, the artistic expression based on multimedia has been paid more attention by the fields. This paper firstly analyzes the general characteristics of art image fusion process in multimedia environment. On this basis, the digital-to-analog conversion (DAC) method of multimedia artistic expression is proposed, which takes the Gauss Pyramid as basis. In order to verify the scientificity of this method, this paper adopts the empirical method to carry on the empirical analysis. The results show that multimedia artistic expression behavior of fine arts based on this method is significant, and has strong practicability and operability.
Effects of NbC/VC Addition on Mechanical Properties of Ultrafine Grained Cemented Carbides
Authors: Jiang Ai Min , Jiang Xian Quan , Zhao Zi Peng , Yang Jin , Yu Rong
Published: August 2014

The samples are prepared by vacuum sintering technology, and the effects of VC/NbC combined addition on the mechanical properties of the WC-8% Co alloys with superfine grain are investigated. The results show that: with the transformation of Co-doped inhibitors content, the grain growth is inhibited and the grain size 460nm at 0.4%NbC/0.4%VC. The mechanism that Co-doped NbC/VC on the effective reduction of ultrafine WC-8%Co cemented carbides was analyzed. The 0.4%NbC/0.4%VC addition equipped with the best integrated properties was obtained in this study. And sintered sample were investigated with SEM.
Analysis of Vortex-Induced Vibration and Heat Transfer of an Elastic Cylinder at Low Reynolds Numbers
Authors: Lin Wei , Chen Zuo Bing , Yu JiuYang , Zheng Xiao Tao
Published: August 2014

The vortex-induced vibration and heat transfer of circular cylinders at low Reynolds number (Re=50~180) was numerical analyzed. The cylinder motion was modeled by a mass-spring-damper system, and the motion equation of the cylinder was solved by Newmark-β method, and then the cylinder velocity was written into the UDF of Fluent, finally, the dynamic mesh technique was used to solve the coupling between the cylinder and flow. The results including “Lock-on” and “Beat” phenomena were obtained, and the effect of mass ration on "Lock-on" was analyzed, furthermore, the influence of vortex-induced vibration on convective heat transfer was also discussed.
Driving Position Comfortability Design of a Low Aerodynamic Drag Energy Saving Car
Authors: Ding Nan , Chen Yue Tong , Li Can Huan , Lei Jia Ning , Qian Jin He , Yang Bo
Published: August 2014

The current Jilin University’s energy-saving car has two problems.Firstly,long time driving let the driver get a pain in the neck,which is uncomfortable. Secondly,the low overheight of the carbody result in a bad vision. This paper try to show how we solve these problems. In order to ease the neck pain and better the vision, the driving space should be increased,which may result in the grow of aerodynamic drag.That’s not welcome. So as to realize the relative balance between driving comfort and aerodynamic drag of energy-saving car. Our group consider the relationship between these two factors, make a wooden model to get the feedback about the actual feeling and calculate the aerodynamic drag by using analysis softwares. Finally,we got a better design plan which satisfied both the aerodynamic drag and driving comfort. The new design plan not only bring energy-saving car’s driving more comfortable,but let us accumulate lots of design experience of energy-saving car.
Numerical Simulation and Experimental Study on Vibration-Decreasing Function of the Barrier Holes
Authors: Lei Zhen , Kang Qiang , Zhao Ming Sheng , Chi En An
Published: August 2014

The finite-element software ANSYS/LS-DYNA was used to study the influence of various parameters of barrier hole on the vibration-decreasing effect, such as the diameter, spacing, depth, hole number and row number of barrier holes and distance from blast holes to barrier holes. The simulation study indicates that: vibration-enhancing area and vibration-decreasing area exist together behind the barrier holes; various parameters of barrier holes can apparently affect the location, range and results of the vibration-enhancing area and the vibration-decreasing area; With bigger diameter, shorter distance, larger number and deeper barrier holes, the better vibration-decreasing results will come out; Under the conditions of numerical simulation in this paper, the effect of double-row barrier holes are better than that of single-row barrier holes, and the effect of vibration-decreasing of triangle layout form is almost the same as rectangle layout form of barrier holes; the changing distance between vibration barrier holes and blast holes will have a fluctuating effect on the vibration-decreasing effect, thus we should select the best location of vibration barrier holes based on the actual engineering conditions in practical engineering. The largest vibration-decreasing ratio of the barrier holes we have obtained at the test site is 33.3%, which is successfully utilized in the production explosion, so we have verified effectiveness of vibration-decreasing effect of the barrier holes.
Entity Analysis of Shear Lag about Grooved Beam
Authors: Chen Mu , Xue Jiang Hong , Gan Neng
Published: August 2014

We establish the entity model of groove beams in Midas FEA. Then we compare and analysis the shear lag effect of prestressed reinforcement caused in different locations. It can provide some suggestions for prestressed rib of groove beams. The result shows that when the prestressed steel beam is located in the middle of small beam, the effect of shear lag is maximum and the shear lag effects of prestressed in two ends are similar, Prestressed reinforcement can be arrangement refer to the results.
Simulation of Piping Process Based on Coupling Seepage and Erosion
Authors: Zhang Jin
Published: August 2014

Only the preliminary stage of piping process can be simulated by current seepage-erosion coupled piping model. In order to enhance the simulation capability, a modified piping model is presented. Theory analysis shows that the governing equations of the modified piping model have significant advantages in practicality and solution accuracy. The solving process of the model is analyzed, with the result showing that the out-of-bounds appearance of the field variables is the major factor interrupting the solving process. Then a new solution technique called dynamic constraint is proposed, which can ensure the validity of field variables. Numerical example indicates that the new governing equations and dynamic constraint technique can enormously enhance the simulation capability of the model, and the piping process can be effectively simulated.
Cluster Analysis of Optimization Algorithm Based on the Athletics’ Mechanics Simulation Model of SimMechanics
Authors: Peng Gang
Published: August 2014

With the development of information technology, computer intelligence technology has been applied in all areas of life include sports biomechanics measurement field. The application of computer intelligent simulation in sports biomechanics measurement became a hot research topic in the field. The article first analyzes the principle and characteristics of cluster analysis. Based on this, it designs a simulation environment of athletics and constructs the analysis model of motion data using clustering analysis algorithm. In order to verify the practicality of the method, this paper establishes mechanical simulation model using SimMechanics. Through the analysis, we can see that the method can significantly reflect body change functions after track and the effect is significant. This method has strong practicability.
Failure Mode Analysis of Bedding Rock Slope Affected by Rock Mass Structural Plane
Authors: Chi En An , Tao Tie Jun , Zhao Ming Sheng , Kang Qiang
Published: August 2014

Based on the discrete element numerical simulation, the change of failure modes of slope influenced by parameters of rock mass structural plane is studied. It is shown the failure modes shift gradually from the bedding sliding failure modes to the sliding-bending failure modes with the increase of the strength of the rock mass structural plane; The slope failure modes are mainly sliding failure modes with the increasing of the normal and shear stiffness and spacing of rock structural plane. Failure modes shift from shearing slip failure modes to shearing slip and buckling failure modes and finally to the tilting failure modes with the increase of the rock structural plane dip angle. The impact of the rock structural plane cohesion to the slope stability is the greatest, and the stiffness is the least.
The Analysis on the Scheme of the Flue Gas Compressor of a 300 MW Oxy-Fuel Pulverized Coal Fired Boiler
Authors: Gao Jian Qiang , Sun Shao Dong , Wang Li Kun , Wang Ning
Published: August 2014

The compression of the flue gas is one of the most critical processes of CO2 recycling in oxy-fuel combustion technology. With a 300 MW Oxy-fuel pulverized coal fired boiler taken as an example of study, the selection of compressors of its flue gas compressing system is analyzed by the thermodynamic calculation. In this paper, two centrifugal compressors with the same specification are in parallel running as Scheme 1 of selection, while an axial compressor and a piston compressor are in series operation as Scheme 2 of selection. It shows that the Scheme 2 has the advantage of the energy consumption and water separation of the flue gas in inter-cooler comparing with Scheme1.
Numerical Simulation of Aluminum Extrusion Process Using Body-Fitted Grids Based Finite Volume Method
Authors: Zhang Yu Jie , Gong Xiao Feng , Wang Rui , Feng Xiao Qing
Published: August 2014

A mathematic model of aluminum extrusion process using body-fitted grids based finite volume method was studied and established in this paper. The basic goverment equations of the finite volume method were built, body-fitted grids were used to mesh computational region, basic goverment equations were discretized on body fitted grids directly, so complex coordinate conversion was avoided by no use of aptamer coordinate system. Initial conditions, boundary conditions and calculation processes of aluminum extrusion process finite volume method were studied and established, a program had been written based this model and a typical process of aluminum extrusion was simulated, amount of physical fields such as velocities, effective stress and effective strain rate etc. were obtained, the results were compared with that simulated by finite element method, so the feasibility and exactness of the mathematic model is proved.
Research Method of Aerodynamic Characteristics of Heavy Duty Truck in Crosswind
Authors: Zhang Zhe , Ren Lin Lin , Li Jie
Published: August 2014

The research program of crosswind aerodynamics was formulated with yaw model test of the relative motion principle for a domestic heavy duty truck. This approach was applied separately wind tunnel test and numerical simulation, to obtain six aerodynamic coefficients of the corresponding heavy duty truck model, and the numerical simulation method was proved to be true by comparative analysis. The conclusions of aerodynamic characteristics got from simulation could provide a useful reference to reduce the impact on crosswind handling stability and the fuel consumption of the heavy duty truck.
Rear Female Dummy Submarining Research Base on C-NCAP Regulation
Authors: Zhu Hai Tao , Zhong Yan Hui , Ji Yi
Published: August 2014

The 5% female dummy submarining phenomenon often occur In the C-NCAP two type's frontal collisions,. The submarining not only will cause the serious damage to human body's abdomen, The dummy abnormal movement form will cause body other parts to receive injury. The article introduced the submarining assessment method, carry on the rear seat 5% female dummy localization and experiment deferred to the C-NCAP management rule, through 7 vehicle type's data analyses, carried on the further revelation to the submarining phenomenon.
Study on Metal Flow in the Finish Rolling Process of Large-Sized H-Beam
Authors: Ma Jin Hong , Tao Bin , Yao Xiao Han
Published: August 2014

According to the production data of a rolling H-beam factory, the FE model of hot continuous rolling process of H-beam is built. With the FEM software of DEFORM-3D, the continuous rolling of H-beam was simulated. On base of simulation result, the metal flow and deformation law are discussed. Because of the flange and web is deformed in the different deformation zone, the metal flow law of flange and web is complex, especially the metal of the conjunction of flange and web. In this paper, the metal flow of large-sized H-beam in finishing rolling process is analyzed.
Study of Fluid Type Smart Spiral Flatting Machine
Authors: Yuan Jian Ming , Wang Yong Long , Wang Gong Xiang
Published: August 2014

Based on the needs of leveling granular materials, a automation control mobile smart spiral flatting machine that can walk directly on the railroad car is researched. The machine is mainly composed of helical pushing mechanism, lifting, walking, anti-deviations, rack construction, power plant, electronic control devices and other components. The technical characteristics of the machine is described in detail, include structure, working principle and intelligent control scheme and key technologies, which provide basic research guide for the smart spiral flatting machine.