bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on the Effect of Fuzzy PID Air-Fuel Ratio Closed Loop Control of a Natural Gas Engine
Authors: Li Yue , Song En Zhe , Zhang Zhan Hu , Zhao Guo Feng , Huang Shuai
Published: July 2014

The air-fuel ratio (AFR) control becomes an important research direction in gas engine. This article conducts air-fuel ratio (AFR) closed loop control research in a CNG engine. The injection pulse width of gas is controlled by a controller, oxygen sensor signal as a feedback signal. In order to make the engine can achieve the anticipated air-fuel ratio under different conditions; we adopt fuzzy self-tuning PID control strategy based on feed forward control. We transformed a 2135G diesel engine into the single fuel gas engine. Experimental investigation on the effect of air-fuel ratio closed loop control .Experimental results shows that, fuzzy self-tuning PID control strategy can control CNG engine air-fuel ratio working in the good condition.
The Design of Step Motor Subdivision Drive Controller Based on FPGA
Authors: Dong Hong Yan , Guo Hong Min
Published: July 2014

This paper, based on the EDA software platform and VHDL description method, introduces how to use the FPGA chip to control the multiphase stepper motor. This design, through automatic logic compilation optimization and simulation test and compile, finally completed the function of the stepping motor subdivision drive controller. By testing, it can achieve controlling positive &negative and subdivision for stepper angle.
The Study of Robot Obstacle Avoidance Based on Fuzzy Control
Authors: Li Shi Xiong , Yuan Qiang
Published: July 2014

This paper focuses on the fuzzy obstacle avoidance algorithm, which is based on the information in dynamic environment with high real-time performance and adaptability. The algorithm can convert the information acquired in three directions through the ultrasonic sensors into fuzzy variables and input into the fuzzy controller, and realize the robot obstacle avoidance according to the inference rules. In order to solve the calculation problem of fuzzy inference rules, a fuzzy inference algorithm based on the addressing is presented to save computing time.
Effect of Electrical Conductivity and Physical Performance about Vulcanization System in Conductive Silicon Rubber
Authors: Zhang Yue Xian , Li Bin
Published: July 2014

Vulcanization methods of conductive silicon rubber are described in this paper. Several common vulcanization agents are also be introduced. The conductivity and mechanical properties of the conductive silicon rubber composite materials are effected by vulcanization systems. The influence degree is introduced by respectively using different vulcanization method, vulcanizing time and vulcanizing temperature. The research progress of vulcanization system of conductive polymer composites is elaborated.
Switched Reluctance Drive System Design Based on DSP
Authors: Ding Xiao Jun , Hu En Dian , Hu Shi Gao , Zhao Tao
Published: July 2014

A switched reluctance motor drive (SRD) is designed in this paper. This system has the characteristics of simple structure and reliable performance. It is designed based on 3 phase, 12/8 pole, 2.2 KW switched reluctance motor (SRM). The TMS320LF2407A is chosen as the core controller. The type of half bridge is adopted in the main power converter circuit, and IGBT is used as the main power switching component and discrete components is used as the main power switch converter device driver circuit. Experimental results show that the designed system can be run steadily under rated load conditions. Moreover, the speed regulation of this system has satisfactory performance.
A New Powertrain System for Electric Hybrid Vehicles
Authors: Wang Ren Guang , Zhang Ming Jun , Shi Chuan Long
Published: July 2014

A new powertrain system was developed for electric vehicle driving application with adoption of one electric motor and one set of planetary gear set. With the control of fork, the sleeve of synchronizer can mesh two different parts on the left and right side; the system can provide pure electric driving, hybrid driving and regenerative braking operation modes to meet vehicle practical conditions. It can reduce both power train structure size and cost with fewer parts.
Photovoltaic Grid-Connected Generation Gnalog Device Gesign
Authors: Bai Xue Feng , Qiu Shi , Li Pei
Published: July 2014

With the reduction of non-renewable energy resources, energy conservation and development of new energy has become an important strategic plan around the world. Photovoltaic technology is also developing rapidly with more and more applications of solar energy. The project designed a set of solar photovoltaic grid-connected power generation analog devices. In this paper, the maximum power point tracking, DC-AC inverter technology, SPWM control technology related to single-phase grid-connected PV system have been studied, a comprehensive theoretical has been analyzed and to develop the relevant control scheme and design a set of simulator based on MSP430F169 microcontroller. The experimental results have met the target and achieved the desired effect.
Application of Back Propagation Neural Network for Partial Discharge Pattern Recognition
Authors: Chang Wen Yeau
Published: July 2014

This paper proposes a pattern recognition approach based on the back propagation (BP) neural network for identifying insulation defects of high-voltage electrical apparatus arising from partial discharge (PD). Pattern recognition of PD is used for identifying defects causing the PD, such as internal discharge, external discharge, corona, etc. This information is vital for estimating the harmfulness of the discharge in the insulation. Since an insulation defect, such as one resulting from PD, would have a corresponding particular pattern, pattern recognition of PD is significant means to discriminate insulation conditions of high-voltage electrical apparatus. To verify the proposed approach, experiments were conducted to demonstrate the field-test PD pattern recognition of model insulators with artificial defects are purposely created to produce the common PD activities of insulators by using feature vectors of field-test PD patterns. The experimental data are found to be in close agreement with the recognized data. The experimental results show that the proposed approach is very effective for recognizing the defects of high-voltage electrical apparatus.
High-Pressure Direct-Fired Steam-Gas Generator (HDSG) for Heavy Oil Recovery
Authors: Ren Meng Meng , Wang Shu Zhong , Qian Li Li , Li Yan Hui
Published: July 2014

High-pressure direct-fired steam-gas generator (HDSG) is to produce multiplex thermal fluid (contains water, CO2, N2 etc.) through efficient direct-contact heat transfer, which would utilize the flue gas heat and reduce the gas emission caused by ordinary boiler. Furthermore, the multiplex thermal fluid can promote the heavy oil recovery by both steam flooding and miscible flooding. This paper introduced three kinds of HDSG: pressurized submerged combustion vaporization (PSCV), multiplex thermal fluid generator and supercritical hydrothermal combustor, which are different in work pressure and method of mixing water and flue gas. Then, we discussed the economic efficiency of HDSG used for heavy oil recovery and concluded that although the pressurization of fuel and oxygen would cost as much as the energy saved by utilizing the flue gas heat, using HDSG for heavy oil recovery has other incalculable benefits such as miscible flooding, waste water treatment and reduction of heat loss through injection well. Finally, we indicated that supercritical hydrothermal combustor will be the trendy of HDSG and pointed out the future research should be carried out on the heat and mass transfer characteristic of the combustion field when water presents and the combustion stability and completeness when pressure increases.
Preparation and Characterization of Proton Exchange Membrane Based on Sulfonated Poly(arylene ether sulfone)/Polyacrylonitrile (SPAES/PAN)
Authors: Wei Hang , Li Guang
Published: July 2014

Sulfonated poly (arylene ether sulfone) s (SPAESs) exhibit good proton conductivity, thermal and mechanical properties, could act as candidates of proton exchange membranes for fuel cells. At the same time, the poor oxidative stability and excessive swelling ratio of SPAESs bring limitations for its further use. In this article, PAN was employed to mix with SPAES, and then SPAES/PAN blend membranes were prepared from the blend solution by casting. The water uptake, dimensional and oxidative stability, proton conductivity were measured with respect to the addition content of PAN, the phase morphology of the resultant SPAES/PAN were also observed by SEM. The results explained that the corporation of PAN into SPAES could reduce the water uptake and improve the oxidative stability of the obtained membranes compared with the pristine SPAES membrane. That the PAN phase distributed as separated domains in SPAES matrix was found, the interaction between SPAES and PAN may be present, which is responsible for the improvement of dimensional and oxidative stability. Although the proton conductivity of the blend membranes became reduced with increase of PAN content in the SPAES/PAN blend, the conductivity of 0.0265S/cm at 30°C could still be reached, satisfying the requirement for proton exchange membrane Fuel Cell
Study of DC System of UHV Converter Substation
Authors: Chen Ping , Wu Lei , Zhang Zhan Tao
Published: July 2014

Base on the conclusion of the DC system configuration of UHV (Ultra-high Voltage) converter substation. Analysis the settings of the 3rd DC power circuit, research on selection of automatic switching device. Provide valuable reference for the design of DC system of substation in DC transmission projects.
Key Technologies of AC-DC Integrated Power Source
Authors: Chen Ping , Yu Guang Yao , Li Peng Da
Published: July 2014

Analysis on potential problems as well as solutions of DC/DC communication power supply. In addition, inductive research has been conducted regarding DC system’s configuration, wiring, power supply mode and nominal voltage selection of existing substations to provide valuable reference for the design of DC system of substations in future.
Waste Heat Recovery Systems of Shampoo Drain Water from Barbershops
Authors: Sun Fang Tian , Li Cui Jie , Wang Rui Xiang , Li De Ying
Published: July 2014

Two waste heat recovery systems of barbershops were presented to increase its heat utilization efficiency. One was the waste heat recovery system with water-to-water heat exchanger (WHR-HE). The other is the waste heat recovery system with both water-to-water heat exchanger and heat pump (WHR-HE-HP). The two waste heat recovery systems were analyzed by both economics and thermodynamics principles. Compared to conventional heat utilization systems of barbershops, the WHR-HE decreases annual energy consumption by 54.2%, and the WHR-HE-HP decreases annual energy consumption by 87.5%. The gain investment recovery periods of WHR-HE and WHR-HE-HP are below half one year. Compared to the WHR-HE, the WHR-HE-HP is with larger energy-saving potential, lower running cost, larger first cost and larger gain investment recovery period. The critical value of energy-saving financial subsidy is 0.778 ¥/W for the WHR-HE-HP. The WHR-HE-HP is very suited to the large and medium-sized barbershops, especially in the cold climate zone.
Design of Cooling Water Scheme of Gas Compressing Station in West-to-East Gas Pipeline
Authors: Li Hong Tao , Xu Zhan Qiang , Zhu Ben Rui
Published: July 2014

This document focuses on motors and frequency conversion equipments of stations of West-to-East Gas Pipeline, and introduces the present main cooling ways. Against water consumption, power consumption, and other economical index, analyze the selection process of cooling scheme in engineering design. Compare with the cost, workload of operation and maintenance of water cooling, air cooling and motor cooling. The result shows that water cooling is practicable in West-to-East Gas Pipeline and has validated in the established engineering. The method of scheme comparison proposed by this paper provides a reference for subsequent design.With the development of electronics technology, medium voltage high power frequency conversion speed regulation technology is increasingly mature. The technology that frequency conversion motor drives compressor unit has been gradually used in the long distance pipeline pressure field of oil and gas under the condition of reliable power supply, to replace the traditional gas turbine, and becomes the first choice of the pressurization equipment of the long distance pipeline, because of advantages of high technology, high efficiency, energy conservation and environment protection, economic benefits and so on[1-3].Stations of West-to-East Gas Pipeline are usually electrical driven. When the compressors operate, motors and frequency converters will produce large amounts of heat, which affects running state and equipment life. So choosing the economic and technological cooling water scheme is important for stations and the whole network to operate safely and stably[4-6].
Research on VSC-HVDC Based on Modular Multilevel Converter Technique
Authors: Chen Si Yu , Li Ya Lou , Hu Xiao Bo , Zhao Li , Chen Chao Xi
Published: July 2014

This paper introduces the topology and working principle of modular multilevel converter, simplifying its equivalent circuit before obtaining virtual equipotential. On the ground of the theoretical model of equivalent circuit, MMC-HVDC could adapt the same control strategy as the traditional method. So, on the platform of PSCAD/EMTDC, an eleven level MMC Dual-infeed HVDC system is established and nearest level modulation is adopted as its control strategy to sort voltage sharing of the modules. Experimental results prove the validity of the proposed model.
Design of a Low Phase Noise VCO for WSN Applications
Authors: Si Xiao Ming , Fan Xiang Ning , Tang Li , Jiang Jian
Published: July 2014

A fully integrated LC VCO with 1V low voltage supply, applied in the frequency synthesizer for wireless sensor network applications, is designed and implemented in TSMC 0.18μm RF/MS CMOS process with low power consumption and good phase noise performance. To conquer the problems brought by low voltage, the structure of VCO is carefully selected. A 4 bit switched capacitor array is used to widen tuning range without worsen the phase noise performance. Besides, a 2 bit switched tail current source array is used to achieve power consumption adapted to the desired operating scenario. Second harmonic filter technology is taken to improve phase noise performance. The VCO designed in this paper has good phase noise performance and low power consumption by optimization. The chip size is 860μm×730μm. Post-simulation results show that the frequency range is between 4.57~6.18GHz with tuning range 30%, the center frequency is 5.375GHz, and the power consumption of VCO core is between 2.6~4mW. At the meanwhile, phase noise is between-116.0~ -117.8dBc@1.0MHz.
Realization of Real-Time Transmission of Spectrum Data Based on the uPP Interface of OMAPL138
Authors: Wang Jie Feng , Huang Dong Hui , Li Chao Hai
Published: July 2014

This paper presents a high-speed and multi-thread-safe transmission based on the universal parallel port (uPP) of OMAPL138 and Field Programmable Gate Array (FPGA).With the aid of I/O module used with IOM mini-drivers (GIO module) under DSP/BIOS and internal direct memory access (DMA), this system can obtain a high momentary speed at 300MB/s. This system is designed for the real-time transmission of spectrum data and raw time-domain data which are most important data for monitoring the wireless frequency resource. The real-time transmission of spectrum data has been applied in a spectrum monitoring receiver.
A Programmable Frequency Divider for Multi-Standard Wireless Receivers
Authors: Wang Jia Feng , Fan Xiang Ning , Tang Li , Shi Xiao Yang
Published: July 2014

A programmable frequency divider based on divider-by-2/3 structure in fractional-N frequency synthesizer is presented, including a high speed divider-by-2 providing orthogonal signals for mixer. This paper firstly introduces two structures of programmable frequency divider, and analyzes the rationality of the circuit structure. Then it presents a method to determine the parameters of CMOS transistors in SCL structure. Finally, each component of the circuit is analyzed. The simulation results show that the programmable divider can work at 1 ~ 8 GHz and generates programmable division ratio from 32 to 127. This programmable frequency divider can be used in mobile communications, satellite navigation, short distance communication and other systems.
Application of Magnetic Control Shape Memory Alloy in Structural Vibration Control
Authors: He Jin Sheng , Wang She Liang , Weng Guang Yaun
Published: July 2014

In order to effectively use Magnetically Controlled Shape Memory Alloy (MSMA) for vibration control in civil engineering structure, the deformation mechanism and dynamic characteristics of the MSMA were studied; research methods apply to the constitutive relation of vibration control in civil engineering structure is given. Based on the study about MSMA vibration controller and its application in structural vibration control in engineering, MSMA in structure vibration control application prospect and development direction are introduced. At the same time, for the difficulties existing in the application are discussed in this paper. The results prove that MSMA materials in structural vibration control are of important value.
Method for Non-Destructive Measurement of Leaf Area Based on Binocular Vision
Authors: Zhao Li , Yang Li Li , Cui Shi Gang , Wu Xing Li , Liang Fan , Tian Li Guo
Published: July 2014

Modern agriculture is developing towards the direction of intelligent. We can realize the nondestructive measurement of plant leaf area by using the digital camera. In this paper, we make the same ratio between the camera’s screen and the background plate to overcome the problem of geometric distortion. Then we use two perpendicular digital cameras from the front and side to collect images respectively for curved leaf. Because there are characteristics of the image grey value mutation on the rage of the vane, we can extract the leaf by image segmentation. The leaf area can be calculated by the statistic of the pixels number according to the projection principle. Experiments show that, the error of leaf area measurement reduces from 13.51% to 5.93% by binocular vision. So this method not only can get the measurement of leaf area data, but also can effectively avoid the two-dimensional image distortion and improve the accuracy of leaf area calculation.
Optimization and Improvement of a Measuring Model for Coating Bonding Strength of Revolution Body
Authors: Zhang Jia Ying , Zhao Gang , Ding Hua Dong , Sun Ye Wang , Yang Jun Wei
Published: July 2014

The process of bonding strength measuring of revolution body coating was emulated by ANSYS. The stress curves with different substrate radiuses of coating bonding interface were drawn. Analyzing the results, and comparing the results with the measuring results of FeAlCrBSiNb in 20mm radius of revolution body and plane coating in the same process and material, they coincided with the finite element analysis results well. Analyzing the errors in the process of bonding strength measuring of revolution body coating, the optimized scheme of measuring model was proposed.
Research of Intelligent On-Line Detection Equipment for Arresting Wires
Authors: Wang Zheng , Zhu Xing Dong , Song Jian Hua
Published: July 2014

The Arresting wires are the key assembly of aircraft landing system on the carrier, the most of all the current detection systems have not the ability of ration detection, and the precision of the system are low. For these deficiency, an on-line detection system for arresting wires was designed, the on-line automatic monitor algorithm, local fault (LF) algorithm were studied. The system detecting destructive by the on-scene detection mode, fast transferring the detection data to the distant PC by industry Ethernet, analyzing and processing the data by software in PC; the experiment shows that the system designed having the ability to ration assessment of LF, detection speed being fast, detection precision being high, and compliance to operational condition.
Research on Path Planning Method for On-Line Measurement of Blisk
Authors: Zhang Lei , Yuan Qiang , Sun Qing Zhou , Song Yu , Zhao Ji
Published: July 2014

The blisk is an important component of aviation engine and its level of machining and measurement will directly affect the application properties of the engine. This paper investigates the on-line measurement of single blade of the blisk. The section lines and the points to be measured are determined by using the empirical formula based on B-spline theory and feature point extraction algorithm. The probe-blade interference problem is solved by dividing the measurement area into different sectors and the posture angle of the probe in different inference-free sector domain is determined. The CATIA simulation is conducted to validate the correctness of the path planning algorithm for measurement. The measuring path planning plays an important role in improving the efficiency and reducing the cost of measurement.
Target Area Detection Based on Piecewise Membership FSVM
Authors: Li Zhong Hai , Cao Hong Yan , Kou Xing Yuan , Man Xiang
Published: July 2014

Aiming at the target detection technique is time-consuming, noise and other issues, improved the application of FSVM in target detection, a piecewise fuzzy membership function is proposed based on LDA algorithm. The algorithm projected the original high-dimensional samples onto a one-dimensional space by LDA ,the original sample’s fuzzy weights is segment calculated based on the distribution of the projection point, reduce the impact of noise and outliers on classification results. In the simulation experiments, this method can effectively reduce the impact of unbalanced data to FSVM, improve the classification accuracy.
Finite-Element Analysis of a Measuring Model for FeAlCrBSiNb Coating Bonding Strength of Revolution Body
Authors: Zhang Jia Ying , Zhao Gang , Sun Ye Wang , Yang Jun Wei , Yang Huai Bin
Published: July 2014

The stress distribution of the coating interface in measuring bonding strength of revolution body coating was emulated. The stress curves of coating bonding interface were obtained. The abscission characteristics of coating were analyzed. It showed that Stress concentration occurred in the symmetric centre of the coating bonding interface. The coating peeled off from the symmetric centre to both sides of the sample interface in the measuring process. Avoiding shearing stress was a method to promote the measuring test of bonding strength of revolution body coating.
Detection of Broken Rotor Bars in Squirrel Cage Induction Motor Using Filter and Wavelet Analysis
Authors: Zhu Hong Yu , Hu Jing Tao , Gao Lei , Huang Hao
Published: July 2014

A new method has been developed for the detection of broken rotor bars fault in squirrel cage induction motor during startup regimes. The incipient detection of fault is made by using DWT analysis of FIR low pass filtered original startup transient current signal. The extracted particular characteristic evolution of the time-varying signal is used as a fault index. The method was tested using healthy and damaged 3.0kW squirrel cage induction motors under no-load conditions. The results indicate that the method yields a high degree of performance in fault identification.
A Correction Method of Fish-Eye Lens Based on Projective Reconstruction
Authors: Zhu Jun Chao , Wan Li , Liu Na , Zhang Bao Feng
Published: July 2014

Fish-eye lens is a special wide angle lens shooting all of the information within 185 degrees at the same time, but the image taken by it cause distortion. In order to fit for people's visual habits, the images need a correction. This article proposes a correction method of fish-eye lens based on projective reconstruction and verified the effectiveness of the method by the experiment.
A Secure Image Watermarking Using Visual Cryptography and Discrete Fractional Fourier Transform
Authors: Wang Hong Yang
Published: July 2014

In this paper we proposed a secure image watermarking algorithm for digital image using the visual cryptography (VC) and discrete fractional Fourier transform (DFRFT). We use the visual secret sharing scheme to construct two shares, namely, master share and ownership share. Features of the original image are extracted using Non-Negative Matrix Factorization (NMF), and are used to generate the master share. Ownership share is generated with the help of secret image (watermark) and the master share, using VC technique. In case of any dispute, the master shares and ownership shares can be stacked together to give the copyright image verifying the ownership about the host image. In order to achieve the robustness and security, the properties of VC, DFRFT and NMF are used in our scheme. The experimental results show that the proposed scheme is strong enough to resist various signal processing operations.
Comparison Research about Wavelet and Moving Smoothing Method Applied in Denoising X-Ray Diffraction Patterns of Tibetan Medicine
Authors: Liu Yuan , Duan Xin Wen , Hu Cheng Xi , Sun Hao , Zhu Jian Rui
Published: July 2014

Comparison research for XRD patterns between Modulus Maximum denoising (marked MJ) and thresholding denoising (marked Thr) all based on wavelet analysis, and the Savitzky-Golay filter (marked SG), as well as variation of denoising effect with required parameters of SG method, was investigated for the first time. The results showed that the Thr method exhibited a good smoothing effect for mineral XRD patterns with sharp peaks, and the MJ method was more suitable for plant-based XRD patterns with broad dispersive peaks. Although the SG method with the optimized parameters possessed a higher denoising property for both the two kinds of patterns, the determination of optimized parameters was hard and needed to be specified by users.
Content-Aware Image Retargeting Based on Semantic Analysis
Authors: Cheng Hao , Li Wei , Zhong Pei Min
Published: July 2014

This paper presents a retargeting approach based on semantic analysis. Our approach has better performance in images that have comlicated backgroud or multi-objects. Our aim is to protect important object in retargeting process. So we brought in object recognition and image importance calculation for retargeting. This approach consists of three parts: object recognition, the importance of image calculation and image retargeting. (i) Firstly we optimized semantic texton forest (STF)[11]and got much better results of object recognition.(ii) Secondly we presented a method called dynamically adjust importance image calculation. (iii) Thirdly we give a retargeting method based on triangular mesh. According to importance image we cover Delaunay triangular mesh on image and solve optimization mesh transforming based on energy function which subjects to least energy loss and boundary restraint. Compared with previous approaches, our method has better result in some complex scene images.
DSP Transplantation of Motion Object Detection Algorithm Based on TMS320DM642
Authors: Zhang Xiao Ling , Xie Peng , Zhang Bao Feng
Published: July 2014

To build motion object detection system based on DSP (Digital Signal Processor), the motion object detection algorithm by existing is transplanted to the DSP development environment based on adopted DSP hardware system.DSP migration process of the moving object detection algorithm is expounded. First of all, Real-time Workshop tool module in Simulink to establish CCS project file which can be identified by TMS320DM642, then testis processor in the loop (PIL) to verify its correctness. Create system model by Simulink instead of the traditional programming to create DSP project files shorten the development cycle and improve the enforceability of the program. Theresults show that the project files generated by the Simulink can meet the requirements in terms of complete moving object detection.
Helium Bubbles Effect on the Mechanical Properties of CLAM Alloys by Milte-Scale Simulations
Authors: Zhang Jing Wei , Cai Jun , Jiang Shuang , Guo Xin , Sun Qiao Zhi , Wang Yan Dong
Published: July 2014

The effect of the different sizes and densities of He bubble on the mechanical properties of CLAM alloy was studied by milt-scale simulation method. It is found that with the increasing of helium bubble size and density, the yield strength and yield strain of CLAM alloys reduced, and the yield strength and yield elongation are predicted to be consistent with the experimental results.
Research on General DEA Model Based on the Grey Linear Programming
Authors: Xia De Chang , Li Ben Tu , Wang Jin Ping , Shi Gui Ping
Published: July 2014

Based on the traditional general DEA model, this paper proposed gray general DEA model which is based on the grey linear programming, and did some study. Then, we get the optimal solution of the gray general DEA by using a method of θ positioned programming solution. Thus, we can know the validity of decision-making unit of the gray general DEA.
A New Approach for Task Allocation in Complex Network
Authors: Meng Hua , Yuan Ya Yan
Published: July 2014

In this paper we show a heuristic method for a kind of task allocation model, which is easy to extend to other situations. Comparing to previous methods, our algorithm is effective with low complexity of computation. In some special cases, we show that our solution is the optimal solution.
A New Disassembly Approach for Binary Code Using Dynamic Multiple-Path Exploration and Static Disassembly
Authors: Qiu Jing , Su Xiao Hong , Ma Pei Jun
Published: July 2014

We present a new approach for disassembling executables with self-modifying code. Self-modifying code is very common in malware. Conventional static or dynamic approaches cannot handle self-modifying code very well. We combine static and dynamic analysis to fight against self-modifying code with the multiple-path exploration technique. The evaluation results indicate that our approach works well in disassembling executables with self-modifying code with high precision and code coverage compared with the state-of-art disassembler.
Algorithm for Wireless Sensor Network Data Fusion Based on Radial Basis Function Neural Networks
Authors: Yang Zi , Chen Ming Rui , Wu Wei
Published: July 2014

This paper presents a data fusion method on wireless sensor network based on radial basis function neural networks. In consideration of the hierarchical relationship topology wireless sensor networks, data acquisition, handling and delivery, we proposed a typical classification approach based on radial basis function neural networks. Optimization strategy adopted to process node data for each node indicated different reaction related with energy consumption. Simulation results verify that the method converges fast and effectively.
Architecture Analysis of Public Cloud in Vocational Colleges
Authors: Cheng Cong
Published: July 2014

The paper targets at vocational colleges with weak information technology infrastructure, analyzes their traditional cost structure, utilization and cost utility of IT resources, discusses the cost analysis model of public cloud if accessible, and explores appropriate IT strategies for rapid development based on actual cases.
Maintenance Optimization of the OLED Manufacturing Process
Authors: Chang Peng , Ao Yin Hui
Published: July 2014

OLED (Organic light-emitting diodes) is a kind of brand-new display technology. The production involves many processes and different equipments. We studied the optimization problem of interval of preventive maintenance in OLED processes. With the help of ExtendSim software, we perform quantitative analysis and adjusted the productive process. Considering the cost of the preventive maintenance and random corrective repair, We optimized the interval of periodic maintenance with the limit of total output and obtained the best profit and lowest maintenance cost.
Non-Uniform Probabilistically Quantized Distributed Consensus Applied on Sensors Network
Authors: Xu De Hong , Peng Huan Xin , Liu Bin
Published: July 2014

In order to improve the accuracy of distributed consensus under digital communication, in the paper, assuming the initial states of nodes following uniform distribution, a non-uniform quantization scheme based on probabilistic quantization is proposed, and the entire data range is divided based on µ-law non-uniform quantization scheme. The quantization step-size near the average of initial states is smaller, and the corresponding quantization errors are smaller. Base on the proposed quantization scheme, a non-uniform probabilistically quantized distributed consensus algorithm is proposed. The performance and the mean square errors of the non-uniform probabilistically quantized distributed consensus algorithm is analyzed, by analyses and simulations, the results show the non-uniform probabilistically quantized distributed consensus can reach a consensus, and the mean square error is far smaller than that of probabilistically quantized distributed consensus.
Online Sponsored Search Budget Allocation across Search Engines: A Simulation Analysis
Authors: Zhou Bao Jian , Qi Wei , Chen Li Gang , Ye Qiang
Published: July 2014

Recently, sponsored search has been rapidly growing which increase tremendous interests in improving performance in search engine marketplace. The complexity of market dynamics makes it difficult for advertisers to maximizing the effect of advertising. Simulation analysis is a more viable option than real world testing especially in fast accomplishing different experiments and effectively prompting decision making supports. In this paper, the sponsored search budget allocation problem model integrated with quality score for single search engine has been explored and then extended to multiple quality-based search engines. Also, several advertising policies have been proposed and verified under the general simulation framework in both single and multiple search engine scenarios.
Research on One Secure Solution for Multiple Factor Ambiguous Pattern Recognition System
Authors: Wang Xiao Mei , Bian Sheng Qin , Zheng Rong , Wang An
Published: July 2014

Ambiguous pattern recognition is a very important technology in the field of science including engineering application nowadays, it uses methods of fuzzy mathematics enabling the computer to recognize and judge the objective things. But, the research on ambiguous pattern recognition system rarely involves the field of security, while in fact both the participant of the pattern recognition and the database need to protect their privacy. This paper mainly introduces the secure multi-party computation into the field of ambiguous pattern recognition, raises a new solution for the secure multi factor ambiguous pattern recognition system under the half honest model, and proves the validity and security of the protocol.
RF Front-End Design and Implementation Based on Application of Software Radio
Authors: Pan De Min , Shang Wen Jing , Wang Nan , Victor Rublev
Published: July 2014

Digitizing architecture of band-pass sampling at IF(Intermediate Frequency) is a kind of software radio structure of high practical value. One kind of application in the digitizing architecture of band-pass sampling at IF of RF (Radio Frequency) front-end hardware is designed in this paper. The experimental results show that this kind of RF front-end has great practical value and research significance.
Simulation Design of W-CDMA/3GPP Communication System
Authors: Feng Meng Lu , Yang Shu Hui , Chen Ying Chao
Published: July 2014

Mobile communication has gone through two generation of development, now the third generation mobile communication technology has been mature and widely used. Achieving the third generation mobile communication technology is intended to give users a better mobile voice call quality, faster mobile data speeds and more multimedia services, to attain large capacity and high spectral efficiency. W-CDMA, one of the three mainstream standard of international third generation mobile communication technology, is based on the foundation of GSM/GPRS and evolve. This paper describes the 3GPP core technology, which is based on W-CDMA, and using ADS to complete the simulation of W-CDMA/3GPP communication system.
SRCE: Security Protocol in RFID Back-End System Based on Certificate and ECDH
Authors: Zhang Bing , Wan Guo Gen
Published: July 2014

The RFID back-end system is the core of the thing of networking technical framework, and it has suffered more security threats. In the face of these security problems in the backend system, this paper design a node bidirectional authentication and key exchange protocol based on certificate and ECDH(SRCE), to guarantee the safety of the RFID backend systems. The analysis result indicates that the protocol obtain smaller key sizes and higher computational efficiency on the performance, furthermore, there are many security properties in which, such as data confidentiality, mutual entity authentication, against known key attack, etc.
The Converter Steelmaking End Point Prediction Model Based on RBF Neural Network
Authors: Dong Xian Liang , Dong Shi
Published: July 2014

The mathematical model of convert steelmaking end point prediction model based on RBF(Radical Basis Function) is presented in this paper. According to the end point prediction problem of the converter steelmaking production prediction problem, we establish the forecast model of converter steelmaking process which describes the relationship between variables such as hot metal quality, oxygen blowing, the quality of the cooling agent and additives etc. and the end point molten steel temperature and carbon content. The prediction system is multidimensional and nonlinear. The model between variables and the target is unknown. For this situation, this paper applies RBF neural network to forecast target, establishing the prediction model based on RBF neural network. So as to obtain the variables and the mathematical model between steel endpoint temperature and carbon content.
Wireless LAN Security Enhancement through Trusted Computing Technology
Authors: She Xin Ping , Xu Jian Ming
Published: July 2014

Wireless communication can provide ubiquitous access to the Internet and more convenience than wired communication. Due to the wide open nature of wireless radio, security over a wireless environment is more complicated. From the initial IEEE 802.11 to IEEE 802.11i, more robust security methods have been adopted to eliminate underlying attacks. IEEE 802.11i is based on the assumption that all participants are honest that they will act as they are expected. But usually it is not true. How to recognize a genuine user, how to keep authentication data safely, and how to prevent dishonest supplicant accessing WLAN are big challenges. Trusted Computing can be used to improve security status of endpoint. Applying Trusted Computing technology can solve these challenges and enhance WLAN security.
Design and Implementation of CRC Error Correction for ADS-B System Responding Based on FPGA
Authors: Ma Yu Ping , Zhang Jun
Published: July 2014

Automatic Dependent Surveillance Broadcast (ADS-B) system signal error detection and correction process scheme are introduced in this paper, and the working principle of cyclic redundancy check (CRC) is described. Then, this paper provides an error correction algorithm based on the confidence judgment and an error correction process flow chart based on ADS-B system. Finally, the design of CRC checksum is performed by taking use of Verilog HDL, and the simulation and verification are achieved in Modelism software platform. Experimental results show that the algorithm can carry out verification and error correction for ADS-B responding signal and can improve the reliability of ADS-B system signal transmission.
Cracking Analysis and Reinforcement Method for a Thin-Wall Plain-Concrete Pier
Authors: Ye Wen Ya , Wu Xiao Qing
Published: July 2014

In view of the rapid development of the high-speed rail construction in China at present, some new plain concrete piers of railway bridges cracked in an increasing trend. Combining a real project, this paper analyzed the causes of the cracking in massive concrete piers through the actual construction condition and the materials prosperities, and made corresponding prevention and improvements for the cracking, provided the reinforcing treatment of cracking piers with corresponding programmes. The analysis and treatment measures for the project will present a reference for the similar projects in the future.
Impact on Ultrasonic Level Test Method of Concrete Crack Depth
Authors: Chang Jian Mei , Yuan Jun Hong , Zhao Yun Yan
Published: July 2014

Level test method is widely used to detect concrete crack depth. Accuracy of the methods is determined by measurement of concrete velocity and transit time. Some proposals are presented to improve accuracy of the test in terms of on-site testing methods as well as crack direction besides judgment of initial wave and role of steel reinforcement nearby. It proves well by way of project example.
Structural Damage Detection Based on Ridge Estimation Method
Authors: Guo Hui Yong , Sheng Mao , Li Zheng Liang
Published: July 2014

In order to identify structural damage locations and extent, a method based on ridge estimation and modal strain energy is presented in this paper. First, structural modal strain energy is given and a modal strain energy sensitivity damage equation is obtained. Then, considering the TikhonovTT regularization theoryTT, a ridge estimation method is proposed to solve the damage equation and ridge parameter of the method is optimized. Simulation results demonstrate that the proposed damage detection method based on ridge estimation and modal strain energy can identify structural damage locations and extent with good accuracy.
Study on Damage Identification of Simple Beam Bridge Based on the First-Order Curvature Mode Ratio
Authors: Qin Yong
Published: July 2014

Starting with damage identification index method on the basis of the curvature mode, the first-order curvature mode ratio is proposed, and then it is made a numerical simulation analysis for a single span simple beam bridge with ANSYS. The identification of structure damage degree under the damage on the single position is studied. The fitted polynomial based on the derivation of the first-order curvature mode ratio can estimate the damage degree; it has a good reference value for the damage detection of structures in practical engineering.
Study on Strain Transfer of Substrate Encapsulation FBG Strain Sensor
Authors: Sun Li , Zhang Bo , Li Chuang , Yue Chuan Yun
Published: July 2014

The FBG sensors of measuring stress and strain on the surface of concrete are mainly based on substrate encapsulation in engineering. Since the substrate encapsulation FBG sensor has a multilayer structure, there is certain consumption when the stress is transferred from the surface of concrete to optical fiber, which leads to difference between measured value and actual value. This paper analyzes the influencing factors of strain transfer rate by the method of theoretical calculation and finite element analysis. The formula of strain transfer is thereby obtained.
The Defect Diagnose Method of Piles with Lateral Excitation Based Wavelet Transform
Authors: Zhou Hua Jian , Wang Xin Quan , Zhang Shi Min , Liao Juan , Huang Ying Sheng , Lin Rong Geng
Published: July 2014

Aiming at the defect happened in existing bridges, a side-excitation way is adopted. Here, the mutual interfere phenomenon between transverse-and longitudinal-wave will appear, which certainly will be influence the reflection the information from fault position. Meanwhile, considering the responses of displacement are too lower, the velocities are used as test data so as to reduce the influence of noise. In the paper, the eigencurves with significant distinctions is suggested, the feasibility of the proposed method is demonstrated by a concrete item.
The Defect Diagnosing Method of Existing Bridges Based on Acceleration Responses
Authors: Wang Xin Quan , Zhang Shi Min , Liao Juan , Huang Ying Sheng , Wang Xian Kai
Published: July 2014

Aiming at the defect happened in existing bridges, a side-excitation way is adopted. Here, the mutual interfere phenomenon between P-wave and S-wave will appear, which certainly will be influence the reflection of the information from fault position. In the paper, considering that the multi-resolution and local features within time-frequency of signal can be appeared by wavelet transform, a defect diagnosing method which utilize eigencurves of acceleration responses is presented, a group typical eigencurves which fit for reinforced concrete piles are given.
Accuracy Enhancement of Videogrammetrey for Structural Dynamic Displacement Measurement with Adaptive Filtering
Authors: Qin Liang Zhong , Zhou Hua Fei , Xie Zi Ling , Lu Cheng Yuan
Published: July 2014

Displacement is a good descriptor of the structural behavior and safety status. However, measuring displacement of structures under dynamic excitations is still a challenging task. Videogrammetry shows great potential for dynamic displacement measurement, benefiting from its non-contact and long-distance characteristics. Nevertheless, its all-weather performance has to be fully evaluated before gaining wide applications. This study therefore carried out an investigation into the environmental effects of the all-weather videogrammetry for structural dynamic displacement monitoring. First, long-term outdoor dynamic displacement monitoring tests were carried out. Virtual structural displacement was generated by a motion simulation device and monitored by a commercialized industrial digital camera. The adaptive filter was then employed to filter out noises, which had the primary input of the major displacement component and the reference input of the minor displacement component. The results show that the adaptive filter is well capable of filtering out noises and the measurement accuracy of videogrammetry is significantly enhanced.
Structural Damage Identification Based on Dynamic Analysis of the Scale Model
Authors: Liu Qing Yang , Gong Yao , Xu Zhen
Published: July 2014

This paper has been prototyped fine 1:20 scale model of the finite element numerical simulation analysis of each parameter sensitivity test conditions, based on similar principles of dynamics, through the production of about 1/20 the proportion of prototype scale model of the bridge, dynamic characteristics of research conducted scale model of finite element analysis, and study whether there are cracks in the presence of dynamic response mode model, summarized the structure of the bridge structure in a given period reflect the physical characteristics of the local sound voiceprint and bridges under the geometric structure of the physical parameters of a period of time to maintain the basic stability conditions, the "voiceprint" has a high probability of stability.
Grid Structure Damage Location Base on Cross-Correlation Function
Authors: Yu Zhe Fu , Huo Lin Sheng , Zhang Lei
Published: July 2014

According to the regular pattern of the grid structure truss, learning from the methods applied to composite damage detection, for grid structure, the paper proposed the concept of the amplitude matrix which comes from cross-correlation function of response signals. A corresponding amplitude distribution map can be obtained. The injuries in different position bring different amplitude distribution maps. The damage area would be determined by comparing these maps with the map derived from intact structure.