bluuebunny/crossref_metadata_2025 huggingface dataset:
The Design of Quasi-Z-Source Boost Converter
Authors: Shao Qin Yuan
Published: August 2014

According to analyzing the basic principle of intrinsically safe output quasi-Z-source Boost Converter, this topology can be modeled. When the quasi-Z-source network parameters Lz and Cz are much smaller than conventional converter parameter LC, transfer function can be order-reduced. Design the close-loop controller after the simplified transfer function model. Finally use the traditional cut-off output protection circuit to verify the theoretical analysis.
Design and Application of the Information Security Framework for Electric System Lifecycle
Authors: Shi Cong Cong , Zhao Wei , Zhu Liu Zhang , Ma Jun Wei
Published: August 2014

With the further promotion of electric enterprise information construction, industrialization and informationization have been deeply integrated. Power system safety and stability is highly dependent upon electric information system. However, as the electric business higher integrated, data more interactive, and structures more complex, electric information system would face serious security risks. Any simple system may become the "short board" of enterprise information security protection architecture, and any vulnerability may bring serious consequences. In this paper, we propose an information security framework for electric system lifecycle based on typical information security model. As the framework widely applied, the overall safety capacity of electric enterprise has increased substantially.
Magnetic Spectral Analysis Method of Ferromagnetic Mixture
Authors: Zhang Qin Lan , Lu Zhi Yong , Liu Xiang
Published: August 2014

There are different magnetic property of materials mixed in the mechanical wear of abrasive and powder processing. Depending on different alloy and magnetized material with different magnetic saturation characteristics, some substances reach the magnetic saturation in the magnetization processing soon, while some substances must be in a strong magnetic field to reach saturation, resulting in the magnetic property of combination material mixed with multi-component metal abrasive has multi-ingredient combination characteristics. Based on the PQ excitation measurement method, we analyze the magnetic property between the typical magnetic abrasive individual and combinations. We also build the magnetic spectral characteristics of the mixture which is made up of materials with different magnetic property, and finish the establishment of two mixtures mapping. This paper aims to explore the magnetic spectral analysis method of ferromagnetic mixture from the theory and experiment, and propose the magnetic spectrum analysis and calculation method of the mixture.
A 16 Bit 250MSPS Pipeline ADC
Authors: Li Ting , Zhang Yong , Wang Yan , Liu Lu , Wang Xu
Published: August 2014

In this paper, a 16 bit 250MSPS pipelined ADC is presented. To alleviate noise induced by mismatching of the MDAC sampling network and comparator sampling network, scaling network structure is applied; to implement high-speed sampling, a high-efficient front-end circuit structure is presented; to further improve the sampling rate, a double duty cycle clock circuit is presented; to improve the linearity of the ADC, the sample and hold circuit is removed and the improved clock controlled boost circuit is used. Simulation confirms that the ADC shows more than 95dB of SFDR for a 25.39-MHz sinusoidal input at 2Vpp at full sampling rate from a 0.18um CMOS process.
The Design and Implementation of Positioning System Based on GPS
Authors: Liu Yan Yan , Li Guo Ning , Wang Li Feng
Published: August 2014

This paper studies and implementation of positioning system based on GPS.The system consists of hardware platforms, positioning terminal software, positioning and monitoring service center. One of positioning terminal is based on Samsung's S3C2440 ARM9 processor, G600 communication module and u-blox GPS positioning module. Positioning terminal software Linux-based development of embedded real-time operating system, it's multi-tasking, real-time characteristics of software provides a good platform. Running on the Linux operating system is the terminal software, by driving the hardware platforms and Linux, the terminal software to complete the GPS positioning, and communications with control centers and other functions. The second type of positioning terminal is based on Android platform for mobile phones and other android pads. Such terminals can use the rich resources of the Android platform to achieve the map display, GPS positioning, communications with control centers. Monitoring platform is a GIS-based management platform, including the integration of the electronic map, and track positioning terminal location query.
Study of the Dynamic Characteristics of Piston Chamber Pressure and its Optimizing
Authors: Yan Bin Qu , Chen Shu Mei , Chen Chuan Ming
Published: August 2014

In order to develop a new type of high-performance axial piston pump, the impact of the dynamic response characteristics of piston chamber pressure to the stability of cylinder block were analyzed. This paper a new type of valve plate which combined two fixed throttling grooves with a triangular groove (called three-level gain) was put forward so as to reducing the excessive pressure adjustment of the dynamic response of piston chamber pressure and improving the stability of cylinder block. The simulation results indicate that not only the cavitation is reduced, but also the stability of the dynamic response of piston chamber pressure is remained at various swash plate angle which makes it applicable to variable piston pump. The results also indicate that the flow pulsation of variable displacement pump is significantly decreased in different operating conditions.
Application of ADS8364 on the Attitude and Heading Reference
Authors: Song Li Jun , Duan Zhong Xing , Chen Deng Feng , Xu Sheng Jun , Sun Ji Wu
Published: August 2014

ADS8364 is a sixteen-bit parallel output that is sampling and conversion at the same time by six channels. It is a kind of high-precision chip sampling in power. ADS8364 is introduced which combined with practical application of DSP on the attitude and heading reference. ADS8364 which can carry out data collection of six channels is used in the attitude and heading reference for data collection of MEMS sensor of inertial. The data are transmitting to DSP which could complete processing of data and estimate of attitude. By analyzing the results of examination, the precision of MEMS gyroscope’s data which are collected by ADS8364 synchronously could satisfy the request of the attitude and heading reference.
A Dynamic Reactive Power Compensation Method of Super High-Power and High-Voltage Motor
Authors: Wang Yi Fei , Yuan You Xin , Chen Jing , Cheng Qi Jian
Published: August 2014

According to the low power factor and low running efficiency, a dynamic reactive power compensation method of the super high-power and high-voltage motor is proposed in this paper. The following works have been done in the study: topology of the dynamic reactive power compensation device; principle of the dynamic reactive power compensation method; control system of the dynamic reactive power compensation device; implementation of the dynamic reactive power compensation method. The amount of reactive power compensation can be adjusted smoothly and dynamically in the process of the super high-power and high-voltage motor soft-starting. The research of this paper has laid a theoretical foundation for this compensator in industrial applications. The novel design is characterized by flexible parameter setting, excellent soft starting performance of the super high-power and high-voltage motor and bright prospect in application.
The Higher Order Mechanical and Electric Fields for Arbitrarily Oriented Crack with the Physical Weak-Discontinuity
Authors: Dai Yao , Chong Xiao
Published: August 2014

The higher order crack-tip fields for anti-plane crack oblique to the interface between functionally graded piezoelectric materials (FGPMs) and homogeneous piezoelectric materials (HPMs) are presented. The crack is oriented in arbitrary direction. The crack surfaces are assumed to be electrically impermeable. The material properties of FGPMs are assumed to be linear functions with their gradient direction perpendicular to the interface. By using the eigen-expansion method, the high order crack tip stress and electric displacement fields are obtained. The analytic expressions of the stress intensity factors and the electric displacement intensity factors are derived.
Modeling and Simulation of Regenerative Braking Rectifier for Electric Vehicle
Authors: Zhou Mei Lan , Su Ge Hang , Wen Jia Bin
Published: August 2014

Aiming at the problem of low efficiency of recycling energy in the process of regenerative braking for electric vehicle, SVPWM algorithm is applied to the process of energy transformation of regenerative braking in this paper. It is derived and verified that, through using SVPWM, DC voltage fluctuation can be reduced in the process of rectification. The simulation model is built basing on the Volkswagen LAVIDA EV. The simulation experiment was carried out combining with the actual working status of electric vehicle regenerative braking. The simulation experimental results prove that DC voltage fluctuations can be decreased and the efficiency of regenerative braking rectifier can be increased through SVPWM. The following feature of rectifier in the braking condition is good.
An Optimization Method of Passive Dynamic Harmonic Filter Used for Medium Frequency Furnace
Authors: Liang Yan Ling , Chen Jing , Yuan You Xin , Cheng Qi Jian
Published: August 2014

The medium frequency furnace is a kind of a stable metal smelting device. The passive dynamic harmonic filter is applied for the medium frequency furnace. Its running results show that the filtering efficiency of this filter is different due to the change of the resonance point during its operation. The most serious situation is to increase the harmonic current of the power grid. Therefore, an optimization method of the passive dynamic harmonic filter used for the medium frequency furnace is proposed in this paper. The following works have been done in the study: to describe and analyze the causes of low filtering efficiency of the medium frequency furnace, to design the interlock circuit between the medium frequency furnace and the passive dynamic harmonic filter, to optimize method of running/pausing the passive dynamic harmonic filter. The passive dynamic harmonic filter with the optimized method has been successfully used in the medium frequency furnace. The running results show that the operation of the passive dynamic harmonic filter is normal and the filtering efficiency is greatly improved.
Review on the Principle and Applications of Acousto-Optic Effect
Authors: Kang Shuai
Published: August 2014

The acousto-optic effect is an important part of the optoelectronic technology, the basic principles and applications of acousto-optic effect have been introduced mainly based on the characteristics of acousto-optic effect in the paper, and we have summarized two acousto-optic diffraction ways---Raman Nath diffraction and Bragg diffraction, which are in application of the detection of planar defects, the acousto-optic modulation, acousto-optic deflection, acousto-optic modulation Q technology.
Study on Electronic Structure and Optical Properties of 21R-SiC Polytype
Authors: Zhang Fu Chun , Zhang Wei Hu
Published: August 2014

The density functional theory based on first-principles plane wave ultrasoft pseudopotential method is adopted to study the electronic structure and the optical linear response function of 21R-SiC. The calculated data include the lattice parameter, the energy band structure, the density of states, the electric charge density, the complex dielectric function and the absorption coefficient, theoretically giving the relationship between the electronic structure and the optical properties of 21R-SiC. The dielectric function and the extinction coefficient of 21R-SiC are investigated by using the calculated energy band structure to provide the theoretical basis for the design and application of 21R-SiC photoelectric material. At the same time, the calculating result also provides the possibility for us to accurately monitor and control the growth process of SiC material.
The Design of Radio Frequency Transceiver Module Based on MCU+RF Structure
Authors: Ren Shao Jie , Hao Yong Sheng , Ge Zhi Jun
Published: August 2014

In order to solve the presence of security, efficiency and other issues in data transmission, the paper designed a wireless communication module based on wireless transceiver chip nRF24L01 and MSP430F2132 microcontroller which can achieve safe and efficient short-distance data transmission. The module has the advantages of low cost, high stability and low power consumption and has a broad application prospects.
The Study on Preventing Users Electic Larceny
Authors: Yang Ying Ying , Shan Yi , Liu Zhi Tong , Li Jian Feng , Jin Jing , Zhu Wen Long , He Li Shuai , Ren Dong Xia , Li Na , Liu Xiao
Published: August 2014

For a long time,users electic larceny has been a headache topic of the electric power department.The users long-term electic larceny has brought great economic loss to the power supply department.In recent years,the stealing power means are emerging in an endless stream,and they have been broght mant difficulties to prevent electic larceny.But the road is high one feet evil spirite is high one a unit of lengh, according to the study on electic energy meter,we will understand the electic larceny means at the sours.Therefore, further study of stealing power means is also our current priority,only the better anti-stealing electic power means, can be completely blocked leak.
The Research and Application of Standard Modular all Insulation Transformer Station
Authors: Wang Gang , Chen Ji Xin , Wang Ning
Published: August 2014

In the power distribution network , transformer station is the most common device, which is related with the power supply security , the landscaping , and has the most maintenance .It is also a large number device that realize standardized equipment very difficult . According to the original power distribution transformer station which has poor ability to withstand the natural disasters, unreliable operation, the low intelligent level, non-insulation, easy to rust, backward technology, environment is not harmonious and other problems, adopt the industrial design concept and method, developing standard modular all insulation transformer station. New type transformer station materials are advanced and reliable, complete all insulation,free-maintenance,have effect for security, anti-corrosion, environmental protection, beautiful, portable, simple.Further ensure personnel and equipment security, convenient operation and management.This article respectively introduces from the new type transformer station research contents, technical route, play the role, application effect and so on.
Simulation of Drag Reduction Mechanism of the Wing Tip
Authors: Liu Xiao Lei , Liu Xue Wei , Song Li Min , Jin Dun , Li Yuan Kai
Published: August 2014

In this paper, the international common CFD software were installed on the flat three-dimensional optimal design wing tip and winglet wing for three-dimensional simulation, and use the results post-processing software post-processing.
Chromatographic Analysis of Oil-Based Electrical Equipment Discharge Failure
Authors: Liu Guo Bin , Wang Ning , Wang Qing Hao , Hai Tian Shu , Zhao Chuan Zong , Hu Gui Bin , Jiao Hong Zhi , Bi Chuan Bing , Cao Hui Yan
Published: August 2014

Discharge of failure was the fault type are likely to occur in transformers, bushings, transformers, and the extent of damage to the equipment is a serious and direct impact on the stable operation of the system, first introduced the principle and gas chromatographic analysis its test methods, then gas chromatography equipment discharge failure is how to judge the conduct described. Through the analysis of transformer oil chromatographic method can be found as early as possible transformers and other equipment inside the existence of latent failures, thus chromatography is to oversee and guarantee the safe operation of an important means of transformer.
Simulation Research on Solutions to 66kV Vertical SVC Switching Overvoltage and the Implementation
Authors: Guo Kun Ya , Zhang Wen You , Jin Peng , Li Jiang Tao , Chen Yong Jia , Wang Shu Han , Wu Si Cong
Published: August 2014

The dry hollow reactor has the features of good inductance linearity and heat dissipation and is not easy to produce ferromagnetic resonance with capacitive load in the system. Therefore, the phase controlled reactor in TCR-type SVC is usually a dry hollow reactor. According to years’ actual operating condition, the phase controlled reactor in 35kV SVC or SVC at a lower level operates stably while tree discharge or breakdown failure frequently happens to the phase controlled reactor in the 66kV vertical SVC, which seriously affects the stable operation of the equipment. This paper puts forward a method of installing arrester on the phase controlled reactors to relieve the SVC switching overvoltage impulse and protect the phase controlled reactors. Besides, it uses PSCAD to conduct a simulation and verifies the feasibility of this method.
Photochromic and Electrochromic Properties of Ruthenium Alkynyl Complexes Based on Dithienylethene Unit
Authors: Wan Ping Nan , Cui Han Feng , Lin Yan
Published: August 2014

A novel binuclear ruthenium alkynyl complexes with dithienylethene unit [{(MePh-tpy)(PPh3)2RuCl}2(C≡C-DTE-C≡C)](ClO4)2 (II) has been synthesized and characterized by elemental analysis and NMR spectra. Its photochromic behaviors and redox properties have also been investigated. The results indicated that the open-ring isomers of the metal complex could be triggered, either by light or electricity, to convert to their closed forms.
Vibration Analysis of Shaft-Bladed System Undergoing both Global Motion and Elastic Deformation
Authors: Yao Xue Shi
Published: August 2014

The vibration model of on a shaft-bladed system is built undergoing both global motion and elastic deformation by finite element method (FEM).The blade’s dynamic equation in rotating reference frame is established.The various effects are analysed such as Coriolis force,centrifugal force,spin softening,acceleration ect,which have influence to a blade vibtation frequencies in varying degrees.The shaft’s dynamic equation in stationary reference frame is deduced by setting gyroscopic matrix and inertia effects.The beam element model in the shaft-bladed system was set and the critical speeds were calculated.Calculation shows that the effects of the prestress and spin softening have great influence on shaft-bladed system vibration frequencies.The blade’s frequencies decreases slightly because the blade stiffness reduced in the system relatively.The work lays a basic foundation for improving the dynamic stability of the rotor system.
Research of HCC-SVPWM Method for Photovoltaic Grid-Connected Inverter with APF Function
Authors: Yang Hua , Luo Ji , Cheng Lei Meng , Su Wei , She Yun Jia
Published: August 2014

In the paper, the system model of photovoltaic grid-connected inverter with APF function is established, proposing HCC-SVPWM control method based on the analysis of voltage space vector and detecting current by using ip-iq algorithm. The system not only makes full use of PV power, but also compensates harmonics and reactive currents of the loads very well. The availability of such theory is proved by the simulation.
Problems and Countermeasures in the Development of Wind Energy Industry in China
Authors: Liu Chong Ming , Du Qian
Published: August 2014

Wind energy industry in China has developed from the rapid growth into a period of steady growth. This paper analyzes the development status of wind energy industry in China , pointing out the problem in the development of wind energy generation equipment quality needs to be strengthened, digestion and absorption problems of wind energy technology, the defecting in wind energy development planning and approval mechanisms , mode of financing , market segmentation , and climatic factors, giving advices such as the proposing quality standards, broading the financing channels, promoting the sustainable development of countermeasures in place to sustainable development of wind energy.
Research on Realization of Over-Current Protection Based on Multi-Agent Strategy
Authors: Rui Qian , Qian Su Qin
Published: August 2014

Targeting at the improvement and optimization of the deficiencies of traditional over-current protection, multi-agent strategy is applied in relay protection to improve the fast response of the backup protection. While confirming the feasibility of the above-mentioned strategy, PLC and field bus techniques are adopted to realize information interaction and liaison among multiple agents and host computer in the environment, converting the original passive time-limit mechanism to active strategic collaboration. And the thesis materializes the effective application of the microcomputer-based, multi-agent-based protection in specific projects.
The Experiment and Simulation Study of the Powered Resonance Tube Driven by Annular Jet
Authors: Tian Zhang Fu , Gong Chang Chao , Kong Xiao Peng , Sun Hai Yang
Published: August 2014

In order to generate low frequency acoustic wave and minish the ratio of the length to diameter, it is appropriate to instead the circular jet by annular jet as the high pressure gas power. So the larger diameter of jet and resonator are got in the condition of the same pressure and flux. Flow simulations and experiments have been performed in order to better understand the behavior of the powered resonance tube (PRT) driven by annular. Simulation and experiment results show the PRT can be excited by a annular jet, and produce low frequency high-amplitude dynamic pressures and acoustic emission. The compression wave and expansion wave transmit into and out of the resonance tube alternately in a cycle and a cycle can be decomposed to two distinct stages of filling and evacuation. In experiment PRT can work in the low frequency at very low pressure, and PRT can generate intense sound wave at frequency from 50~3200Hz.
Simulation Research on 40Gbit/s Hybrid WDM/TDM PON System
Authors: Yang Jiang Nan , Huang Li Qun , Tang Xue Li
Published: August 2014

Recently, wavelength division mulplexing (WDM) technology has been extensively studied, and various WDM-PON architectures have been proposed for next-generation passive optical network (PON). In this paper, we combine the TDM with WDM architecture to achieve high-speed, long-distance transmission. To reduce the cost of ONU, we achive the colorless ONU by placing a Reflective Semiconductor Optical Amplifier (RSOA) in the uplink transmission. We build the whole architecture to simulate the Hybrid WDM/TDM PON System in Optisystem and the experimental results prove that the architecture is feasible and reasonable.
The Application of Entropy Method in Wind Power Combined Prediction
Authors: Li Kang Ping
Published: August 2014

A new combined method of wind power prediction based on entropy method is proposed according to information fusion technique. Firstly, Carry out the wind-power forecast with BP neural network, radial basis function neural network and support vector machine respectively. Then, weights of combination forecasting can be obtained according to the degree of variation of prediction error sequence. Case study was carried out to investigate the validity of the novel algorithm and the results illustrated that the proposed combined model can improve the short term forecasting accuracy of wind power effectively by tracking the change of wind power.
An IPv6 Based QoS Unicast Routing Mechanism
Authors: Duan Hong Chao , Wang Xing Wei , Huang Min
Published: August 2014

IPv6 is the core protocol of Future Internet. Thus, IPv6 based QoS (Quality of Service) routing mechanisms need to be developed to support diverse QoS requirements of new network applications. In this paper, an IPv6 based QoS unicast routing mechanism is proposed based on OSPFv3 and BGP4 +. By introducing QoS state message and extending the link state database and link state advertisement, the collection, storage and release of intra-domain QoS information are realized. By introducing NLRI (Network Layer Reachability Information) which supports QoS, the release and revocation of inter-domain QoS routing information are realized. The mechanism not only provides QoS support, but also is compatible with the existing routing protocols. It can be quickly and effectively deployed in networks. A prototype implementation of the proposed mechanism is completed, which is tested under a video conference application over the CERNET2 topology. The results indicate that it is feasible and effective with good performance.
A Spam Filtering Scheme Based on Scalable Decision Tree
Authors: Wang Jing , Wang Xing Wei , Huang Min
Published: August 2014

Nowadays, Internet has been flooded with spams, which not only disrupts routine network application, but also affects people’s normal life and work. Thus, an accurate and effective spam filtering scheme is indispensable. In this paper, the scalable decision tree is utilized to analyze feature information of email-header to obtain anti-spam rules, which can be further used to filter spams. As is shown in the test result that the proposed scheme has satisfying performance and it is feasible in spam filtering.
A Trustworthy QoS Unicast Routing Scheme Based on Population Adaptive Based Immune Algorithm
Authors: Liu Jin Yang , Wang Xing Wei , Huang Min
Published: August 2014

In this paper, a trustworthy QoS unicast routing scheme based on trustworthy network is proposed. First, a cognitive network model is designed, referring to the intelligence of artificial immune system. Then, trustworthiness of each node is evaluated by deploying sliding window mechanism and analyzing the behavior record of each node. Finally, a population adaptive based immune of trustworthy QoS unicast routing algorithm is proposed, referring to the adaptive process of antibody identifying antigen. We verify the effectiveness of our scheme by using large-scale computer emulation experiments and compare it to existing classical algorithms. The results show that the proposed algorithm is both feasible and effective for providing users with better QoS, etc.
Target Value Analysis Based on Data Mining Technology
Authors: Chen Pei Bin , Hu Lan , Yang Hui , Xue Xiang Feng , Liu Chuan Xu , Li Xin Jian
Published: August 2014

In this paper, the data mining technology and the mining process was explained; and several common methods of data mining were described. Based on the characteristics of the target value, application of text classification and textual association in the target value mining were discussed, and the process model of data mining concerning target value was also expressed.
Research on the Neural Network Learning Evaluation Model of Meteorological Technical Personnel
Authors: Deng Xu Hua , Gan Xiang Gen , Wu Ren
Published: August 2014

With the increasingly salient social influence of virtual practice, personalized lifelong learning concept could be realized through network platform. The new learning environment and platform generate the new evaluation system and model. The working experience and features of network learning of the meteorological technical personnel determine the difference between network evaluation model and the traditional summative evaluation system.. The nonlinearity between input vector and output vector also determines the neural network learning evaluation model orientation. The training and simulation show that the network learning evaluation achieves its best effect when the hidden node is 4.
An Efficient Improved Algorithm of Convex Hull
Authors: Liu Shao Hua , Zhang Jia Hua
Published: August 2014

This paper introduced points and directed line segment relation judgment method, the characteristics of generation and Graham method using the original convex hull generation algorithm of convex hull discrete points of the convex hull, an improved algorithm for planar discrete point set is proposed. The main idea is to use quadrilateral to divide planar discrete point set into five blocks, and then by judgment in addition to the four district quadrilateral internally within the point is in a convex edge. The result shows that the method is relatively simple program, high computational efficiency.
Casting Process and Simulation of K19 Cylinder Block
Authors: Chen Yi , Yang Gang , Yang Yi , Wang Kang Sheng , Lu Chen Guang
Published: August 2014

Cylinder blocks are the most important parts of engine, and their qualities will fundamentally determine the efficiency of engine. In this work, the casting process of K19 engine cylinder block was studied. A casting process was designed and assessed by the numerical software MAGMA to produce cylinder block castings. An actual experiment of casting was carried out and the mechanical properties of the casting were examined. The simulation results show the liquid metal smoothly fills the casting mold and no shrinkage cavity and porosity are formed in the castings. The cylinder block produced by the actual experiment exhibits superior mechanical properties to common ones, which proves the casting process designed is suitable for producing high quality cylinder block castings. The research shows that numerical simulation can provide very useful guidance for the production of castings
An Improved Algorithm for Color Medical Image Compression Based on DCT
Authors: Yang Qiang , Wang Hua Jun , Luo Xue Gang
Published: August 2014

Medical image compression technology has great significance in the field of medical image engineering and clinical application. The current image compression technology is mainly for gray image, Few people study on medical image color compression algorithm. This paper presents a compression algorithm for color image based on DCT. First, the algorithm change the color medical image of RGB space to SAT space, this transformation ensures the medical image without distortion, and effectively reduce the mean image of each dimension of component. Then, the algorithm make the DCT transform for color image compression in the SAT space. Experimental shows that the improved algorithm in color medical image compression has achieved good results.
Wavelet Neural Network with PLS Feature Extraction and its Application in Aerodynamic Modeling for Aircraft Stall
Authors: Gan Xu Sheng , Tang Xue Qin , Gao Hai Long
Published: August 2014

An aerodynamic modeling method based on WNN with Partial Least Squares (PLS) is proposed. In the method, PLS first is applied to extract the feature of original aerodynamic data samples, and then the obtained feature is used to establish the WNN aerodynamic model for aircraft stall from flight test data. Simulation results are given to illustrate that the proposed method is effective and feasible.
Physical Essence of Stall Phenomena and its WNN-Based Aerodynamic Modeling from Flight Data
Authors: Gan Xu Sheng , Tang Xue Qin , Gao Hai Long
Published: August 2014

To understand the characteristics of aircraft stall for better aerodynamic model, the physical essence of the stall phenomena of aircraft is first introduced, and then a Wavelet Neural Network (WNN) is proposed to set up the stall aerodynamic model. Numerical examples indicates that through the deep cognition of the stall phenomena of aircraft the proposed stall aerodynamic method has a better accuracy than the traditional neural network and is also effective and feasible.
Study on Ant Colony Algorithm about Resource Search and Optimization in Cloud Manufacturing
Authors: Chen Zhi Gao
Published: August 2014

These years, a new networked manufacturing mode named cloud manufacturing is arising. Cloud manufacturing comprehensively uses various information technology, manufacturing technology and management technology, through virtualization and servitization of manufacturing hardware and software resources. CloudM is to provide user with on-demand, always-ready, high-quality and low-consumption service, which is available from product design, manufacturing, testing, simulation and maintenance and other manufacturing lifecycle process. Service composition is one of the key issues in implementing CloudM system. In this paper, an adaptive ant algorithms have been proposed, which In hadoop environment to optimize the use of composite service execution path. As the experimental result shown, this method can effectively avoid the congestion of data on the critical path.
Chaotic-Sequence-Based Channel Estimation Algorithm for Secure Optical OFDM Systems
Authors: Wang Han Dong , Huang Li Qun , Yao Feng
Published: August 2014

In this paper, in order to improve the security of optical OFDM system, we propose a new method to generate the pilot sequence of channel estimation using chaotic sequence. Firstly, we assign initial values to chaotic system, and calculate a chaotic sequence through an iteration method, then converting it into a binary sequence as the pilot of a DFT-based channel estimation algorithm. When the receiving end doesn’t know the chaotic-sequence-based pilot, the system will have very high BER, and can not restore the original data, which indicate that the new method provides a certain degree of security for optical OFDM systems without increasing the system complexity.
Multicast Routing Algorithm with QoS Constraints in Mobile Ad Hoc Networks
Authors: Li Yue , Liu Yin Hui , Luo Zhong Bao
Published: August 2014

Through the study of MANET's QoS multicast routing problem, we propose a heuristic-demand multicast routing algorithm. Algorithm combines the MANET network bandwidth estimation algorithm, redefined the select function, restrictions request packets of flooding algorithm, to ensure fair treatment delay and bandwidth. Simulation results show that the algorithm has the advantage of fewer routing overhead, high success rate.
Application of AHP in Determining the Weights of Evaluation
Authors: Chen Ning Ning
Published: August 2014

In this paper,based on the AHP analysis, we puts forward a concept of Analytic Hierarchy Process, In order to achieve to determine the index weight more scientifically. And verify the scientific and reasonable of this method by example.
Research on the Construction of Crowdsourcing Platform
Authors: Liu Ying , Dang De Peng
Published: August 2014

According to the problem that there have not any research focuses on building a general crowdsourcing platform that can be serviced any enterprises. This paper have studied the key issues such as the platform framework, operation mode and construction principles and other issues to be considered when building such a special crowdsourcing platform. The crowdsourcing platform that build based on the key issued studied in this paper has greater practical value, which can be used as the communication bridge between crowdsourcers and contractors and service all the enterprises and the community, thus achieving a win-win goal between the crowdsourcers and contractors.
Compatibility Check for Flight Test Data from Aircraft Based on Maximum Likelihood Method
Authors: Gan Xu Sheng , Tang Xue Qin , Gao Hai Long
Published: August 2014

To accurately identify the nonlinear model for aircraft, maximum likelihood method is introduced to analyze the flight test data for compatibility check, which can satisfy the kinematics equations of aircraft at the same time. The experiment shows that the proposed method has a good compatibility check effect, and it is also effective and feasible for flight test data for aircraft.
Settlement Prediction of Buildings Based on BP Neural Network
Authors: Li Jian Cheng
Published: August 2014

At present, the traditional neural network model have been used in settlement prediction of buildings area, but there are some limitations. In this paper, BP neural network is applied in the settlement prediction of buildings and the prediction result is compared with the measured values. The results show that: the use of BP neural network to predict the settlement of existing buildings is feasible. The study results can provide a reference for the anti-seismic performance census of existing large area buildings.
Wind Speed Forecasting Based on Least Squares Support Vector Machine and Particle Swarm Optimization
Authors: Zhang Jun
Published: August 2014

This paper is based on Least Squares Support Vector Machine theory to build the wind speed forecasting model. Meanwhile, as there is still no effective choice method of Least Squares Support Vector Ma-chine parameter, this paper tried to use Particle Swarm Optimization theory to optimization choice for parameter. And last, use wind farm observed wind speed (sampling interval is 1 minute) of three days to forecast the next minute wind speed through this paper's wind forecasting model, and prediction result is that the MAPE is only 4.63%, the prediction effect is relative ideal, confirm the feasibility of applying the Particle Swarm Optimization Algorithm and Least Squares Support Vector Machine theory to forecast the wind speed, it will provide theoretical support to wind farm layout and wind power forecasting and so on.
Numerical Simulation of Temperature and Effective Strain Distribution of Aluminum Alloy in the Whole Rough Rolling Process
Authors: Zhang Bo , Liang Xiao Ping , Fu Jun Feng
Published: August 2014

A two-dimensional finite element mathematical model of rough rolling in "1+4" hot continuous rolling of 5052 aluminum alloy was developed by using finite element software Deform, The temperature and effective strain distribution of the strip in different process parameters has been investigated in by simulating the mathematical model in different simulation conditions. The process parameters such as rolling speed, initial temperature, contact heat transfer coefficient between work roll and strip have been considered. The simulation conditions were built by the means of orthogonal experiment. The process parameters, which can make the temperature and effective strain of the strip in a relatively uniformity distribution, were achieved by analyzing the simulation results under different simulation conditions. To judge the uniformity of the temperature and effective strain distribution of the strip quantitative in different simulation conditions, standard deviation has been used as a criterion.
Data Mining Algorithm of Frequent Probability Item Based on Sliding Window
Authors: Zhang Zhi , Fu Qi
Published: August 2014

In order to meet the uncertain data stream mining demand in large dynamic database, a frequent probability item mining algorithm was proposed base on sliding window. The mass data in the database was regarded as a data stream. In the window model of data stream, the frequent item set was extracted according to the probability frequency distribution information of data. Compared to the traditional algorithm, the mining environmental constraints of the certain data stream was overcome, the defect that the relevant information was easy to lose was improved. The true information of data was reflected fully, and the most accurate frequent item was minded. Simulation result shows that the new algorithm can mine the frequent items accurately, and the accuracy rate is higher than the traditional method. It can process the data quickly. It provides effective strategy for analyzing the large database, and it can meet the memory requirement and performance requirement in database analysis and mining.
Research on Cultural Industry Distributed Network Control Model Based on Genetic Algorithm
Authors: Xue Hong Wei
Published: August 2014

The network economy era brings new challenges to all aspects of society, and the construction of network culture industry also brings an urgent request. Due to the complexity of network culture industry, the construction and study of cultural network industry has certain challenging. In order to realize the massive network industrial data analysis, we introduce the genetic algorithm into the network control model, and put forward the distributed network control model based on genetic algorithm, which can realize the massive data analysis. In order to verify the effectiveness of the algorithm, this paper uses MATLAB genetic algorithms toolbox to debug the algorithm, and obtains the genetic algorithm fitness curve and the data transmission quantity statistics. It provides the theory reference for the construction of network culture industry.
Performance Test and Algorithm Design of Kinematics Electronic Platform Based on Nonlinear Fitting Algorithm
Authors: Ying Shu Juan
Published: August 2014

With the continuous expansion of internet shopping, e-commerce platform is also increasing, which also contains a large number of sports consumer e-commerce platform. This paper introduces the concept of RBV into the sports consumer e-commerce platform, and optimizes the design of the platform by using nonlinear fitting principle, finally obtains the basic structure of sports consumption e-commerce platform. In order to verify the validity and reliability of the platform, this paper uses Rebuild function of VC software to debug platform algorithm. Through calculation it is found that the nonlinear fitting algorithm designed in this paper is more stable than the general algorithm, and its stability is above 90%, which is accord with the design requirements. It provides a new computer method for the studying sports consumption.
The Design of Compressed Sensing Image Reconstruction Algorithm Based on Structure Priori Model
Authors: Zhang Lin , Zeng Xia Ling
Published: August 2014

Compressed sensing is referred to as the CS technology; it can realize image compression and reconstruction process in low sample rate. It has great potential to reduce the sampling rate and improve the quality of image processing. In this paper, we introduce the structure prior model into the compressed sensing and image processing, and make the image reconstruction of high dimensional optimization process simplified into a series of low dimensional optimization process, which improves the processing speed and image quality. In order to verify the effectiveness and reliability of the proposed algorithm, this paper uses combined control form of C language and MATLAB software to design the programming of structure prior model, and use the Simulink environment to debug the program. Through the calculation we get the image block and the reconstruction result. It provides the technical reference for the research on image compressed sensing technology.
Research and Implementation of Extension Strategy Generating System
Authors: Huang Hai Ou
Published: August 2014

It is instructed by Extension study’s theories and methods,and combining the knowledge of Artificial Intelligence ,taking adventage of the method of Date Mining ,in sesearching of the rule which settling contradictions in the process of decision making,accordingly,set up extension model,finally settle contradictions.
An Advanced Genetic Algorithm Apply to Test Data Generation for Paths Coverage
Authors: Feng Xian Bin , Ding Rui , Zhang Yan , Dong Hong Bin
Published: August 2014

An advanced genetic algorithm is proposed to apply to test data generation for paths coverage. We advanced the classical genetic algorithm: divided the population into “families”, using the family-in-crossover in each family and PSO-crossover operator between two families which commixed the thought of particle swarm; Then, the fitness function is designed by consider of the difference degree and the degree of approximation, and the model of the advanced genetic algorithm applying to test data generation for paths coverage is given in detail. Finally, the proposed algorithm is applied to a benchmark program, and compared with previous algorithms; the results show that the proposed algorithm is obviously advantageous in the number of generations and time consumption.
Ontology Construction Research for the Mobile Phones' Reviews on the Internet
Authors: Sun Yi Ming , Han Chun Lei
Published: August 2014

In order to automatically identify the mobile phones' reviews that the users comment on the mobile phone on the internet and obtain valuable information from the reviews, this paper presents the process of constructing ontology for the mobile phones' reviews and preliminarily establish a domain ontology of the mobile phones' reviews. The ontology construction adopts the Protégé tool and the Seven Steps method of Stanford University research. The ontology can provide convenience for the semantic information mining on Web mobile phones' reviews, and it can provide a new method to effectively mine the use feelings of the phone from a large number of mobile phone users' reviews.
The Evaluation of Communication Network Reliability Based on Markov Process
Authors: Cui Li Min , Wu Yun Na
Published: August 2014

This paper introduces the general model of Markov repairable system, combined with the typical design of 750kV substation communication system, put forward the Markov general model for 750kV substation communication system, a communication system reliability evaluation system based on the state of the equipment. Sensitivity analysis of the equipment failure rate and repair rate parameters on the system reliability, the failure rate and repair rate impact on system reliability, to develop communication system state maintenance, and provide a method to improve the reliability of system.
Data Warehouse Algorithm Study with a Novel Mutation Operator
Authors: Cao Jian , Li Gang , Zhang Cheng Tao
Published: August 2014

Focused on the issue of establishing data warehouse in data mining study, the study also considered the current situation of researches into dynamic plan recognition. This paper aims to enhance the performance of PSO in complex optimization problems and proposes an improved PSO variant by incorporating a novel mutation operator. The results obtained extend and improve the corresponding theorem for independent identically distributed random variables sequence.
The Tooth Profile of Car Synchronous Belt Influencing on the Stress Distribution
Authors: Shi Yao Chen , Li Zhan Guo , Yang Xiu Guang
Published: August 2014

This paper aim at the ZA type car synchronous belt, using the CATIA software create the synchronous belt and pulleys 3D model, divide synchronous belt mesh with ANSYS software, and import into the multi-body dynamics software RecurDyn and build up the dynamic simulation model of the car synchronous belt transmission through the MFBD (more flexible body dynamics) techniques. Analyzed the transmission performance of the synchronous belt、contact stress of tooth surface and tension stress. It propose the stress distribution between belt and pulley, and the distribution state of the tensile stress. It provide a digital simulation and design method to design the car synchronous belt tooth shape, analysis the transmission performance and select the material of rubber and the reinforcing cords.
Image Fusion Algorithm by SGCMG Design and Time Accumulation Error Analysis
Authors: Cao Jian , Bai Yun , Ma Hai Ying
Published: August 2014

In order to make full use of texture features of image when fusing images, and taking into account the inherent advantages of fractal theory in this respect, a novel image fusion algorithm, which has been applied to large foreign spacecraft already, but late start and only limited to configurations and steering law study in China. Based on the needs of agility small satellites, this article explained the method of SGCMG principle prototype design and proposed the influence on SGCMG output torque precision generated by time accumulation error first time. This article provided a new idea for future SGCMG project development and had good reference value for SGCMG research.