bluuebunny/crossref_metadata_2025 huggingface dataset:
Effect of Palm Kernel Meal as Melamine Urea Formaldehyde Adhesive Extender for Plywood Application: Using a Fourier Transform Infrared Spectroscopy (FTIR) Study
Authors: Ong Huei Ruey , Prasad Reddy , Rahman Khan Md. Maksudur , Chowdhury Md. Najmul Kabir
Published: October 2011

Increased demand for wood adhesives, environmental concerns, and the uncertainty of continuing availability of petrochemicals have led to recent attention on protein-based adhesives. This study was conducted to investigate the physico-chemical interaction of palm kernel meal (PKM) with melamine urea formaldehyde (MUF) resins in adhesive formulation by using Fourier Transform Infrared (FTIR) Spectroscopy. The effect of hot press on PKM extender has been investigated by FTIR and blue shift is observed due to the hot press indicating that the functional groups (such as C=O, -OH and NH) are become more free in the samples. In the case of PKM-MUF blend bonding interactions observed where, PKM played the role as an extender. Red shift of C=O and N-H groups stretching in PKM-MUF-Wood blend is observed which suggests the interaction of these functional groups through hydrogen bonding. The results suggest that PKM extender-based MUF adhesive resins have potential application for the production of exterior plywood.
Analysis of the Thermal-Structure Coupling of the Band Brake
Authors: Hu Fu Cai , Li Hu Lin , Xie Bei Si
Published: October 2011

A 3D model of band brake is established with PRO/E software, and its thermal-structure nonlinear coupling is analyzed with finite element software MSC.Marc. Temperature field and stress field distribution of the brake band and the friction linings in braking process are calculated, and the failure mechanism of the connecting bolt is analyzed. All these provide references for optimization design.
Three-Body Abrasive Wear Behavior of Basalt and Glass Fabric Reinforced Epoxy Composites
Authors: Chairman C. Anand , Babu S.P. Kumaresh
Published: October 2011

Three-body abrasive wear behavior of basalt–epoxy (B–E) and glass–epoxy (G–E) composites have been investigated using Dry sand rubber wheel abrasion resistance for various abrading distance, viz., 150, 300, 450 and 600m and different loads(22N and 32N) at 200 rpm. The weight loss and specific wear rate as a function of load and abrading distance were determined. The weight loss increases with increasing load and also with abrading distance while the specific wear rate decreases with increase in abrading distance and increases with the load. Better abrasion wear resistance was observed in B-E composite compared to G–E composite. Scanning Electron Microscope (SEM) is used to examine the abraded composite specimens and revealed that the more damage occur to glass fiber compared to basalt fiber. Also good interfacial adhesion was observed between epoxy and basalt fiber which leads to good abrasive wear resistance.
Using Enhanced Landfarming System to Remediate Diesel Oil-Contaminated Soils
Authors: Kuo Yu Chia , Wang Sih Yu , Kao Chih Ming , Chen Chiu Wen , Sung Wen Pei
Published: October 2011

The objective of this study was to assess the potential of applying enhanced landfarming system on the treatment of diesel-oil contaminated soils. Laboratory reactors were conducted to determine the optimal operational conditions of the modified landfarming. Except of frequent soil tilling for air replacement, different additive was added in each reactor enhance the removal efficiency of total petroleum hydrocarbon (TPH). The additives used in this study included kitchen waste compost, petroleum-hydrocarbon (PH) degrading bacteria, rice husks, and activated sludge. PH-degrading bacteria were isolated from PH contaminated soils and activated sludge was collected from a wastewater treatment plant containing PH in the influent. PH-degrading bacteria and sludge were added to increase the microbial population and diversity. Rice husk was used as the bulking agent (soil to bulking agent volume ratio = 3:1) to increase the soil permeability. The compost (soil to compost volume ratio = 3:1) was used as organic amendment to increase both the microbial population and soil permeability. Results indicate that the highest first-order TPH decay rate and removal ratio were approximately 0.1 day-1 and 92.4%, respectively, observed in reactor containing compost. In the compost reactor, TPH dropped from 5,900 to 450 mg/kg and total viable bacterial counts increased from 9.4×105 to 7.2×108 cfu/g of soil within 25 days of incubation. This indicates that the kitchen waste compost contained high microbial population and organic content, which could cause the rapid bacterial growth and enhance the TPH degradation. The TPH removal ratios for sludge, PH-degrading bacteria, rice husks, and control reactors were 86.9, 83.1, 79.7, and 54%, respectively. This indicates that the soil tilling played an important role in the landfarming system, and significant amount of TPH removal was due to the volatilization mechanism. Adding sludge or PH-degrading bacteria could cause the increase in both the total microbial population and specific PH-degrading microbial consortia, which caused the increased TPH removal efficiency.
An Image Matching Algorithm Based on SIFT and Invariability of Feature Points Set
Authors: Wang Xue Tong , Xu Yao , Gao Feng , Bai Jing Yi
Published: October 2011

Feature points can be used to match images. Candidate feature points are extracted through SIFT firstly. Then feature points are selected from candidate points through singular value decomposing. Distance between feature points sets is computed According to theory of invariability of feature points set, images are matched if the distance is less than a threshold. Experiment showed that this algorithm is available.
Enhance ASM Based on DCT-SVM for Facial Feature Points Localization
Authors: Fu You Jia , Li Jian Wei , Xiang Ru Xi
Published: October 2011

Focused on the facial feature points localization, the enhance ASM algorithm based on modeling texture by the DCT-SVM is proposed. First, the statistical shape model is built. Then, some key feature points are selected and their texture models are built by the DCT-SVM. In the subsequent searching, the feature points are divided into two classes based on their reliability gained by DCT-SVM detector, by combining the reliable feature points to the shape constraint, the original shape can finally match to the target face. Experiments show the algorithm is robust to the expressions change and can better locate the features than the traditional ASM.
Experimental Study on Laser Assisted Milling of Sintered Silicon Nitride Ceramics
Authors: Wang Xiang Wei , Zhang Hong Zhi , Wu Xue Feng , Wang Yang , Yan Li Jun
Published: October 2011

Laser assisted milling (LAML) is a potential method for machining difficult-to-machine materials such as superalloys and ceramics, which uses a high power laser to focally heat a workpiece prior to material removal with a traditional cutting tool. A laser assisted milling experimental system was set up to investigate the cutting process of LAML of sintered silicon nitride. Effects of operating parameters on cutting forces, chip morphology, surface roughness and subsurface damage were investigated. The results showed the feasibility and advantages of LAML of ceramics including good surface, decreasing cutting force and tool wear, and no micro-crack zones.
Conceptual Design Program of Drilling Fixture to Create and Evaluation Methods
Authors: Li Bi Qiong , Hu Zhi Tao , Liu Cheng
Published: October 2011

This paper explores conceptual design of drilling fixture based on the functional layer analysis, the fuzzy judgment algorithm is introduced from the initial solution of principle to the final optimized design scheme. This paper describes the thoughts and algorithm of conceptual design of drilling fixture based on fuzzy judgment, this method in many schemes to choose the optimal scheme is feasible.
Inverse Kinematic and Dynamic Analyses of the 6-UCU Parallel Manipulator
Authors: Liu Guo Jun , Zheng Shu Tao , Ogbobe Peter O. , Han Jun Wei
Published: October 2011

From the practical viewpoint, the inverse kinematics and dynamics of a practical Stewart platform, the 6-UCU parallel manipulator, are established in this paper. The velocities and accelerations of the manipulator are derived with the consideration of the attachments of the joints, and then the driving forces actuated by the actuators and the reaction forces applied to the joints are derived based on the Newton Euler method. In the last, the correctness of the equations established in this paper is confirmed by the study of a case. These equations can be used as the base for the precise analysis of the 6-UCU parallel manipulator.
Relation between Actual Mass and Simulation Mass of Far-Field Underwater Explosion
Authors: Xie Zui Wei , Wu Xin Yue , Wan Qiang
Published: October 2011

The far-filed underwater explosive shock wave pressure and impulse is simulated by the FEM code LS-DYNA, and the simulation results are found having rapid decay characteristic through compared with the empirical results. Based on this phenomenon, the relations, whose validity is verified through a computation instance, between simulation mass and actual mass under given initial conditional is obtained by using curve fitting. Using those equations, the accuracy of LS-DYNA to simulate far-field underwater explosive can significantly be increased, thus the ability of this code to simulate far-field underwater explosion is enhanced.
Research on the Hydrodynamic Forces of the Torsional Wave Propulsion by Extended Large-Amplitude Elongated-Body Theory
Authors: Du De Feng , Jiang Xiao Qin
Published: October 2011

Torsional wave propulsion is different from transversal wave propulsion. Based on the characteristic feature of fin ray’s motion, we divide the dorsal fin along the radial direction into a series of long narrow bands. For each band, the analysis method is the same as the method computing hydrodynamic force of transversal wave propulsion. Then we give an integral calculation over fin ray’ length. We analyze the influence of the swing amplitude, frequency and length of fin as well as wave numbers and ratio of wave speed to swimming speed on hydrodynamic force. The calculated results show that: 1. the average thrust on the dorsal fin is directly proportional to the square of swing amplitude and frequency of fin ray. 2. The average thrust on the dorsal fin is directly proportional to the biquadrate of ray’s length. 3. As the wave numbers increase, the average thrust begins with a little increase and then turns to decrease. When the wave number roughly equals to 1.5, it reaches to a maximum. 4. If the fin frequency is fixed, the average thrust is of maximum when the ratio of wave speed to swimming speed roughly equals to 1.4.
Research on Online Monitoring for the Main Drive System of Rolling Mill
Authors: Hou Yu , Kong Jian Yi , Wang Xing Dong
Published: October 2011

An online monitoring method for the main drive system of rolling mill is studied in this paper. The monitoring objects are drive shaft torque, rolling force, and other related process signals of the rough rolling mill. A non-contact torque measurement method based on induction power supply was adopted, and this kind of power supply for sensors and transmitters can provide a long-term stable power supply, and make the system work continuously. The overall monitoring system includes signal acquisition module, network communication module, database server module, status monitoring and alarm module, signal processing and analysis module, and client server module. The realization of the monitoring system can help to prevent catastrophic damage and reduce additional costs due to unexpected downtime.
Application of Ultrasonic Guided Waves Testing Method in Coiled Springs
Authors: Zhou Fang Jun , Wang Yue Min , Shen Chuan Jun , Sun Feng Rui , Zhang Hong Tao
Published: October 2011

In this paper,application of defect detection by ultrasonic guided waves in springs has been studied in three aspects,which are theoretical calculation, simulation modeling and experiments.For the springs structure is helix and it can not be directly described easily,less work has been done on theoretical calculation of elastic wave propagation in the springs.The elastic wave equation of the spiral structure is established and calculated numerically here,considering the theoretical calculation helps to quantitative analyze the law of elastic wave propagation in the springs.Then guided waves dispersion relations corresponding is achieved.The experimental results of spring field testing agree well with the theoretical calculations and simulations,indicating the effectiveness of ultrasonic guided waves inspection in springs.
Investigation on the Rheological Behavior of PA11/POE/OMMT Nanocomposites
Authors: Zhang Yan Fei , Li Ying Chun , Hu Guo Sheng
Published: October 2011

The rheological behavior of PA11/POE/OMMT nanocomposites was studied by using XLY-Ⅱ rheometer. The curves of lgτω~lg, lgηa!lg, lgηa!1/T were obtained. The experimental results showed that PA11/POE/OMMT nanocomposites were pseudoplastic fluid. The apparent viscosity of the blends reduced with the increase of the shearing stress.Compared with PA11/POE blends, the addition of OMMT increased the apparent viscosity. The viscous activation energy of PA11/POE/OMMT blends declined as the increase of shearing stress, which indicated that the PA11/POE/OMMT blends could be processed over a wide temperature at a high shearing stress.
A Short-Term Load Forecasting Method of Warship Based on PSO-SVM Method
Authors: Li Dong Liang , Zhang Xiao Feng , Qiao Ming Zhong , Cheng Gang
Published: October 2011

The power load characteristics of warship on a specific task was analyzed,and a task-based forecasting method for warship short-term load forecasting was presented. the new influencing factors of warship power load were used in modeling which is different with the land grid and civilian vessels grid. Theory of particle swarm optimization and Support vector machine was disscused first, and the method of particle swarm optimization was improved to have the ability of adaptive parameter optimization. and the method of support vector machine was improved by the adaptive PSO optimizational method. then a new adaptive short-term load forecasting model was established by the adaptive PSO-SVM method. finally Through simulation results show that the adaptive PSO-SVM method is highly feasible to predict with high accuracy and high generalization capability.
A Role of Low Energy Grain Boundaries in the Abnormal Grain Growth in Fe-3%Si Alloy
Authors: Zhu Ye Chao , Mao Jiong Hui , Tan Fa Tang , Qiao Xue Liang
Published: October 2011

Low energy grain boundaries were considered to be important in abnormal grain growth by theoretical deduction. The disorientation angles and coincidence site lattice grain boundaries distribution of more than 20 Goss grains and their neighboring matrix grains in primary recrystallized Fe-3%Si alloy were investigated using an electron backscatter diffraction method. It was found that the frequency of low energy grain boundaries of Goss grains which are more likely to abnormally grow are higher than their neighboring matrix grains, which indicated that low energy grain boundaries play a dominant role in the abnormal grain growth of Fe-3%Si alloy. The result meets well with the abnormal grain growth theory.
Significance Tests on Design Factors Affecting the Frequency Performance of Spherical Cymbal Transducer
Authors: Wu Shi Lin , Zhang Qi , Xiong Jiu Long
Published: October 2011

Orthogonal experiment was used to optimize the design of spherical cymbal transducer. Through variance analysis of orthogonal experiment results, the primary and secondary order that each design factor affects the frequency performance of spherical cymbal transducer has been found. At the same time, the significant level of each design factor has been gained. Those factors which have highly significant or significant effects on the frequency performance of spherical cymbal transducer should be considered carefully during design spherical cymbal transducer, and those factors which have no significant effects can be ignored. In this way, the design factors were reduced, and the design complexity of spherical cymbal transducer was simplified.
Delay Loop Current Control Methods of Shunt Active Power Filter
Authors: Liu Gui Ying , Su Shi Ping
Published: October 2011

Active power filter is a widely used harmonic suppression and reactive power compensation, it can on the smart grid in the harmonic and reactive to better dynamic compensation. This paper analyzes the parallel active power filter compensation principle, the use of DC voltage loop control that contains the ip-iq method for the detection of smart grid command current and fixed delay loop current tracking control method for shunt APF current tracking control using Matlab / Simulink simulation model build and control the angle from a different instance of simulation. The simulation results shows that different nonlinear load thyristor firing angle, fixed delay loop current tracking control can be effective in real-time tracking control, real-time simulation model system can detect the operation command contained in the current system, and effective compensation, to achieve the desired results.
Heat and Mass Transfer Finite Element Simulation of Clay Ceramic Prototype in High-Temperature Drying
Authors: Meng Fei , Zhang Hai Ou , Wang Gui Lan , Ping Xue Cheng
Published: October 2011

In the DPST (Direct Prototype Spray Tooling) sprayed directly prototype tooling technology of Huazhong University of Science and Technology , due to brittle characteristics of ceramic materials, there was low efficient in the processing of large mold .The study would obtain sprayed ceramic prototypes through Industrial robots directly milling of ceramic rough technology, However, clay ceramic prototype embryos after milling would occur large shrinkage in the high-temperature drying and consolidation. In the paper it has established a clay material mathematical model of heat and mass transfer in the high-temperature drying process, and carried out finite element simulation in the ABAQUS, obtained shrinkage deformation law of the clay material.
Optimization Design of Excitation Strategy on Vibrating Wire Sensor
Authors: He Hu , Sun Jian Hui , Tian Dong Cheng , Li Na
Published: October 2011

There are two ways of excitation on steel-string sensor—high-voltage plucked excitation or low-voltage scanning frequency excitation. But both of them have disadvantages. The disadvantages of high-voltage plucked excitation are that it has a large damage to sensor, the signals got through this way attenuate fast, and measurement accuracy of the signals is poor. On the other hand, low-voltage sweeping excitation scans a long time and signals got though this way are hard to catch. This paper proposes a kind of feedback type low excitation method, which is pre-excite a sensor with a lower voltage on plucked vibration, and use vibration frequency got from this way as output of the excitation driver to vibrate the sensor for the second time. Because the feedback signal frequency is approximate to the real one, the string can reach a resonance state in a very short time. The optimal excitation strategy is verified by a new designed exciting and measuring circuit. It is confirmed that resonance amplitude can be larger in a shorter excitation time by this way, and result in an enhanced anti-interference ability, reduced the cost of signal processing circuit, increased available measuring time and improved the accuracy of frequency measurement.
The Model and Algorithm of Doppler Radar Speed Measurement System
Authors: Yang Rong , Zhang Jie , He Yan Ling , Huang Yang
Published: October 2011

Based on the measurement of train speed, this paper briefly describes the basic principle of Doppler speed measurement and the design of speed measurement system. By the analysis of test signal which simulates the actual speed signal and comparison of the simulation results, the AR power spectrum estimation algorithm is selected as the model of speed measurement system, and the Burg method is selected to evaluate the Doppler frequency. Then the effect of parameters such as sampling frequency, length of the input vector, FFT length and estimation order on power spectrum estimation are analyzed, the optimization principles of the parameters are defined. Finally, the determined method is simulated with a high-noise, multi-jamming signal and has good results. The accuracy, stability and immunity are proved by the simulation.
Track Initiation Based on Extended Trellis and Randomized Hough Transform
Authors: Zhang Yan Hang , Su Xiao Hong , Ma Pei Jun
Published: October 2011

This paper presents a track-before-detect (TBD) algorithm for detection of unknown quantity of targets with parabolic tracks. First, eliminate large number of clutters orderly by expanded trellis and the method of mean power. And then get candidate parabolas by Randomized Hough Transform (RHT). The true tracks of the targets are extracted successfully by a strategy of outliers eliminating at last. Experimental results indicate that the proposed algorithm is capable of detecting multiple targets without the assumptions of an upper bound to the number of targets.
Based on FE Method to Research Resistant Rutting Ability of Pavement Structure in Heilongjiang Province
Authors: Cao Peng , Feng De Cheng , Jing Ru Xin
Published: October 2011

Using visco-elastoplastic-plastic finite element method, the resistant ability to rutting occurring in Heilongjiang province express way has been analyzed. Base on the numerical results, it has been found that the location of rutting occurring mainly existed in middle course, So some modified measurement of middle course to enhance the resistant rutting ability has been proposed. At the same time, A new user Subroutine, which is named dload of ABAQUS, has been employed to simulate the moving vehicle load ,this article has proposed a new method to predict rutting behavior .
Design of the Environment Multi-Parameters Recorder Based on MSP430 SCM
Authors: Wang Qian , Liu Shu Xia , Zhao Xiao Shun , Jiang Wen Jun
Published: October 2011

The paper selected reasonable sensitive parameters for detecting and designed environment multi-parameters recorder with MSP430 SCM, which is the core of the recorder. It can realize to test, display, and store data in the Nonvolatile Ferroelectric Random Access Memory FM31256, even if the power of the system is shut off, the data does not lose. Utilizing Multi-parameters recorder, it can measure strength of four kinds of environment parameters, which include temperature, humidity, illumination and the concentration of carbon dioxide at the same time, and also can detect one kind parameter in four kinds of parameters. Using the interface chip CH375 which supported USB host-device mode, it can communicate with flash memory disk or PC, conveniences the using for different people in different situations.
High Altitude Airship Flight Control System Design and Simulation
Authors: Fan Yong Hua , Li Xin , Yu Yun Feng
Published: October 2011

The high altitude airship can not have desired performance to control the altitude rapidly and accurately when the elevator or ancillary air bursa charge or deflation is used only, because the elevator has little efficiency when the velocity is low and auxiliary air bursas charge or deflation control is very slow. It is present a method to design flight control system for a high altitude airship using auxiliary air bursas charge or deflation and elevator combination control. This combination control scheme is that the ancillary air bursa and elevator are also used to control the airship attitude to get large raise velocity and the ancillary air bursa control is used to adjust the airship altitude for suspension. In this paper, a high altitude airship model with compound control of elevator and ancillary air bursa charge and deflation is given firstly. Then the combination controller is designed by using fuzzy self-tuning control. Finally, it has been proved by simulation that the flight control system has desirable performance and the compound control scheme is feasible.
Review of the Tele-Calibration Technology
Authors: Fang Tian Chi , Wu Shi Lin , Wang Jing , Wang Zhi Hu
Published: October 2011

This paper aims to present a new way of providing calibration services, which uses the Internet to expand present calibration technology and makes the calibration process easy to operate. A new technology that is known as “tele-calibration” is presented. Further, this paper also discusses the general construction of the tele-calibration systems.
Robust Fault Detection for Singular Stochastic Systems
Authors: Zhang Ai Qing
Published: October 2011

-This paper deals with the problem of fault detection filter (FDF) design for singular stochastic systems . By using an observer-based FDF as a residual generator,the robust fault detection is formulated as a filtering problem. Based on linear matrix inequalities (LMIS) techniques and stability theory of stochastic differential equations, stochastic Lyapunov function method is adopted to design a FDF such that, the filter residual system is sensitive to the fault but robust to the exogenous disturbance.Sufficient conditions are proposed to guarantee the stochastically mean-square stablility with an performance for the faulty detection system. The existence of a FDF for the system under consideration is achieved in terms of LMIS . Moreover, the expressions of desired fault detection filter are given.
A Balance Ability Evaluation Method Based on Multidimension Passive Motion Excitement from 6-PSS Robot
Authors: Xiao Jin Zhuang , Yang Xin Cai , Wang Hong Rui , Liu Kun
Published: October 2011

Focusing on personal balance ability evaluation, a method was developed to improve the dependency to many uncertainties, and to enhance veracity and objectivity, where impulse disturbance for human gravity center was produced by a six degree-of-freedom motion platform of 6-PSS under feet, and corresponding wave of gravity center was measured by a force plate real time. Dynamic process of overcoming this disturbance was abstracted as classic second-order linear model, where the product of damp coefficient and undammed circular frequency was estimated through recorded data based on system identification theory. By using this value, settling time was calculated and used as the balance evaluating index. Through the evaluating results of 103 students or graduate students, the feasibility of this method was validated, and reference ranges of healthy persons’ settling time were concluded for clinical balance evaluation.
Mechanics Analysis of the Vibrating Subsoiler System Considering Material Acting Force
Authors: Xin Li Li , Liang Ji Hui , Qiu Li Chun
Published: October 2011

Soil has elastic-plastic deformation under vibrating working condition. And the acting force between the soil and the vibrating subsoiler parts is of complication. In order to study the effect of the material acting force to the vibrating subsoiler system kinetics features, this paper establishes the vibrating subsoiler system mechanics model considering material acting force. It adopts numerical integral to answer and analyze this model and verify the correctness of the model through comparison of the simulation data and experimental data. The analysis shows that when the amplitude is between 0.01m-0.02m and the vibrating frequency is between 14Hz-16Hz, the vibrating subsoiler can have a comparatively good performance.
Adaptive Fuzzy Velocity-Based Routing for MANET
Authors: Li Chang Le , Zhang Han Xiao , Hao Bin Bin , Li Jian Dong
Published: October 2011

In Ad hoc On-Demand Distance Vector Routing (AODV) protocol, numerous control messages consume a large quantity of the network resources, which deteriorates the effectiveness of AODV. In this paper, Fuzzy Velocity-based AODV (FV-AODV) is proposed for improving the reliability and effectiveness of AODV in wireless mobile ad hoc network (MANET). According to the velocities of network nodes, FV-AODV adaptively adjusts the HELLO_INTERVAL, which is the transmission time interval of two successive HELLO messages. The simulation results demonstrate that the reliability and effectiveness of FV-AODV are improved comparing with AODV.
Comparison of Synchronizing Speed Limitations of Networked Lorenz Oscillators when Coupling Strength Tends to Infinity
Authors: Liu Ge Qun , Xu Xiao Ming
Published: October 2011

Limitation of synchronizing speed is a key feature for finite time synchronization of complex networks. We studied such limitations as coupling strength tends to infinity for networks with Lorenz oscillator as nodes under conditions that nodes were coupled in different ways. It was found that if nodes are coupled by only one state variable, coupling by second variable has the highest synchronizing speed. If nodes are coupled by two state variables, coupling by second and third variables has the highest synchronizing speed. If nodes are coupled by all three variables, the limitation of synchronizing speed will approach infinity.
Multi-User Detection of DS-CDMA Based on Improved-FastICA
Authors: Liu Xiao Zhi , Feng Da Wei , Zhang Tian Shuang
Published: October 2011

Multi-user detection (MUD) is used to control multiple access interference (MAI) and promote system performance and capacity, which is one of the key technology for CDMA system. Independent component analysis (ICA) aims to recover a set of unknown mutually independent source signals from theirs observed mixtures without knowledge of the mixing coefficients. FastICA, one of the ICA methods, has been successfully applied in various fields. But the classical FastICA does not converge quickly. In multi-user detection of direct sequence code division multiple access (DS-CDMA) system, we proposes an Improved-FastICA algorithm to reduce multiple access interference (MAI). The improved-FastICA algorithm uses a new Fifth-order Newton iterative method to estimate the negentropy. The experimental results show that the improved algorithm has the advantages of smaller bit error rate than traditional algorithm. The Improved-FastICA is more suitable for applications in DS-CDMA system.
The Analysis of Miss Distance Sensitivity to Target Maneuvers for the Terminal Guidance System
Authors: Yao Yu , Wang Xing Dan , Yang Bao Qing , Guo Jian
Published: October 2011

This paper gives a new definition, the Miss Distance Sensitivity to Target Maneuvers (MDSTM), which evaluates the robustness of the Terminal Guidance System (TGS) and gives the degree of exact miss distance caused by the inaccurate estimates of target maneuver. In this paper, the criterion of sensitivity analysis is the ratio of miss distance to target maneuver. The form of the TPN is investigated and then the GTPN guidance law is also proposed. Then, considering cases that the flight control system without dynamics and the dynamics characteristic can not be ignored, the MDSTM performance of TGS governed with TPN and GTPN for step acceleration target maneuvers are analyzed. Finally, the sensitivity analysis results of the system are listed in the paper, and the conclusions of how the effect the MDSTM were given in the end of the paper.
Fault Diagnosis of Power Quality
Authors: Ou Yang Lan
Published: October 2011

The proposed method in this paper indicates two issues, selection of discriminative features and classiﬁes event classes with minimum error. Wavelets features (WF) of power quality (PQ) events are extracted using wavelet transform (WT) and fuzzy classiﬁers classify events using these features. The captured signals are often corrupted by noise; the non-linear and non-stationary behaviors of PQ events make the detection and classiﬁcation tasks more cumbersome. Performance comparison of the proposed method is made with three other fuzzy classiﬁers using different wavelets and superiority is veriﬁed. In the proposed approach of event classiﬁcation, fuzzy product aggregation reasoning rule based method has been used.
Nonlinear Resonant Generator for Harvesting Energy from Human Wrist Vertical Shaking
Authors: Sun Kai , Liu Guo Qiang , Xu Xiao Yu
Published: October 2011

Based on the structure of permanent magnet (PM) spring, composed of one fixed end magnet and one moving magnet, a nonlinear resonant electromagnetic micro-generator is designed, which is suitable for human wrist vertical shaking and can be used as an emergency power source for portable electronic products, such as cell phone. Generator model is built under the condition of resistive load, which has been solved numerically through simulation. The model is validated by the measured results and can be used for further study of generator optimization and power processing circuits. The experimental results show that the prototype could generate power as high as 50 mW under the condition of simple harmonic driving acceleration with the amplitude of 0.8g(7.84 m/s2) and the frequency of 3.33 Hz.
Real-Time Database System Implementation of Railway Signal Power Source Remote Monitoring
Authors: Qu Zhi Jian , Liu Li
Published: October 2011

Railway signal is a key technology for high-speed railway，which is the foundation to keep the high-speed train line. Railway signal power is the automatic blocking of railway lines and 10kV lines transform into 380V power through after the power supply for railway signals. Signal power as the railway traffic signal of the power supply, it belongs to the first level of power system load. Its 10kV high voltage side stik up by the major of electric, 380V low voltage side maintenance by the signal major. When the signal power failure, often occur shirk responsibilities between the different majors, in order to define the responsibilities of the accident better, which need automation remote monitoring for main railway lines of the railway signal power and scheduling control as soon as possible[1-3].
Preparation and Research of AuNi Cathode Catalyst for Direct Methanol Fuel Cell
Authors: Yan Shao Hui , Zhu Wei Li , Zhang Shi Chao
Published: October 2011

AuNi alloy was synthesized by vacuum arc melting in high-purity argon atmosphere. The AuNi alloy was characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy (EDS), and X-ray photoelectron spectroscopy (XPS). The results of EDS indicated that Au and Ni atoms were well-distributed in the alloy. Moreover, the results of XPS exhibited an electronic transfer from Ni to Au in AuNi phase. The Electrocatalytic oxygen reduction reaction (ORR) activity and the methanol tolerance of the AuNi alloy were respectively investigated using the RDE method and the electrochemical cyclic voltammetry. The results suggested that O2was directly oxidized to H2O on the AuNi catalyst via an approximate four-electron reduction pathway, and that the AuNi catalyst had a high electrocatalytic activity for the ORR and an acceptable methanol tolerance, simultaneously.
Research of Project Investment Control Based on Life Cycle Theory
Authors: Peng Jun Li , Li Xiao
Published: October 2011

Project Investment Control runs through the whole process of project construction, and after the future decision-making stage, the design, tendering, construction, and the final account of the cost-control effect determine the final results of project investment control. In this paper, reference to relevant examples of actual projects, not only discusses the factors that affect the project investment during each stage of project implementation, but also suggests some corresponding control measures in use of life cycle theory, designed to provide reference for investment control of project construction.
Calculation on the Internal Force of Deeply Buried Anti-Slide Pile by Using Finite Difference Method Based on the m-k Type Method
Authors: Fan Qiu Yan , Wang Mei Qian , Xu Sheng Cai
Published: October 2011

In the past, when used the foundation coefficient to calculate the internal force of anti-slide pile, power series method is usually adopted. The deformation compatibility conditions and continuity conditions of sliding surface between non-anchoring section and anchoring section are exploited to determine the final result, causing the lengthy solution process and that there is no guarantee for the calculation accuracy. This paper uses the foundation coefficient method in the calculation of internal force of anti-slide pile and employs the “m-k” method with a more complicated up-down foundation structure to get the finite difference equation to determine the new-type deeply buried anti-slide pile displacement and internal force. Then the calculation on the internal force and displacement of the whole pile can be realized easily through the procedure method. Finally, this paper makes a contrastive analysis on the result of the finite difference method and finite element calculation through the case study. As long as the equal differential step length is small enough, the calculation accuracy can meet the demand of engineer design and the program graph processing result can optimize the design of anti-slide pile.
The Effect of the Ratio of H/W on the Performance of the Hybrid Wall Powered by Solar Energy
Authors: Liu Bin , Chen Jie Hua , Bennacer Rachid
Published: October 2011

The performance of the hybrid wall powered by solar energy was numerically simulated. The factor of H/W was discussed The performance parameters include the induced air mass of the outlet, the induced air velocity of the outlet and the temperature difference between the inlet and the outlet. The results show that ratio of H/W has an important effect on the performance of the hybrid wall powered by solar energy. The induced air mass of the outlet is decreased linearly with the ratio of H/W in a logarithmic coordinate. The temperature difference between the inlet and the outlet increases with the increasing of the ratio of H/W. But for the induced air velocity, it increases with the increasing of the ratio of H/W, and when the ratio is higher than 10, it decreases with the increasing of the ratio of H/W.
The Toughening Mechanism of Polyamide 6/EPDM-M/Nano-CaCO3 Ternary Composites with Sandbag Microstructure
Authors: Wang Yong Jie , Dong Yu Xin , Shi Yan Qin , Chen Si , Wang Xu
Published: October 2011

Ternary composites of Polyamide 6 (PA6), the mixture of Maleated and Unmaleated Ethylene Propylene Diene terpolymer rubber (named EPDM-M), and nanoCalcium Carbonate (nanoCaCO3) were prepared by one-step and two-step compounding routes. The toughness of the composites was tested by impact test. The microstructure morphology of impact surface and etched impact surface was investigated through scanning electron microscope (SEM). The result shows that toughness of the ternary composites with sandbag microstructure was 270 % higher than neat PA6. The SEM morphology shows that strongly elongated microfibrils and deformation are formed in ternary composite with sandbag microstructure, which cause larger shear yielding and crazes in the surrounding matrix to dissipate more impact energy. Additionally, strong ligaments are observed at the crack tip, which could promote plastic deformation and consumption of fracture energy.
Power Quality Disturbance Research of Grid-Connected Wind Generation Based on Fractional Fourier Transform with Wavelet Entropy
Authors: Chen Hua Li , Sun Yun Lian
Published: October 2011

In the process of connected wind generation with the power grid, the classification and recognition of power quality disturbance signals which are researched by the scholars at home and abroad are always the hot issues in Power System. A new method using Fractional Fourier Transform (FRFT) with Wavelet Entropy is presented for recognizing the signals of PQ disturbance based on the characteristics of power quality (PQ) signals. FRFT have better time-frequency aggregation and can choose better domain instead of and make PQ disturbance recognize more accurately with wavelet entropy. Simulation results demonstrate its effectiveness.
Economic Analysis of Solar Energy/Air Compound Source Heat Pump System
Authors: Liu Tao , Zhang Zhi Gang , Zhang Wei
Published: October 2011

The foundation, principle and prior condition and engineering economic Evaluation Criteria of engineering economic analysis are introduced. The economy for a solar energy/air source heat pump system is analyzed. Through a single air-cooled heat pump system, air conditioning in summer + winter heating systems, solar / air source compound heat pump system model analysis and comparison of three systems, integrated initial investment and running costs of both, come to solar / air source compound heat pump system has certain advantages in economical efficiency.
Experimental Study of Mechanical Properties of Fiber of Deep-Sea Mooring Cables
Authors: Zhou Gai Li , Li Linan , Li Shui Jiao , Wang Shi Bin
Published: October 2011

In order to learn the mechanical properties of deep-sea mooring lines, experimental studies involved in strength properties have been carried out in this thesis. In the fiber strength performance test, the small force-large deformation experimental device has been designed and optimized. As the fiber diameter is very small (about 40μm), microscope is chosen to measure the diameter. The intensity curve of fiber is divided into three typical phases. The yield strength, breaking strength and elastic modulus in initial stage can be calculated and the elastic modulus is basically a constant. With the increasing of loading rate, the breaking force reduces and gradually tends to stabilize. It has got the formula, breaking strength ∝.
Influence of Working Fluid Thermophysical Property on Thermal Performance of Flat-Plate Closed Loop Pulsating Heat Pipe
Authors: Wu Qing Ping , Wang Rui Xiang , Li Ya Jun , Xu Rong Ji , Li Yan Zhong
Published: October 2011

Pulsating heat pipes are high efficiency heat transfer components having a great potential application in the field of electronic cooling and space applications. In this investigation, an experiment was conducted to study the influence of working fluid thermophysical properties on the thermal performance of flat-plate closed loop pulsating heat pipes (FCLPHP). The analysis of the forces acting on the liquid-vapor mixture shows that the surface tension, viscosity and latent heat of vaporization have important impact on the thermal performance of FCLPHP. The overall thermal resistance decreases with the decrease in surface tension, viscosity and latent heat of vaporization, leading to the heat transfer improvement of FCLPHP. An experimental correlation was developed to describe the relationship among the relative overall thermal resistance and the relative thermophysical properties. With the correlation, a sensitivity analysis was made. The results show that latent heat of vaporization is the prior factor to the all others to impact the thermal performance of FCLPHP.
Camera Self-Calibration with Planar Pattern Using Genetic Algorithm
Authors: Kao Chun Hao , Lo Rong Ching
Published: October 2011

In the paper, a stereo camera self-calibration method with Genetic Algorithm (GA) applied to the navigation of autonomous land vehicle (ALV) in a natural environment is proposed. The proposed method does not require specific object as a calibration pattern, e.g. checkerboard; conversely, it exploits common feature, for example: planes among natural scenes. In the evaluating process of GA, the coplanar condition of 3D points is employed as a fitness function to inspect the camera parameters. In addition, real valued GA is used because it does not only decrease the complexity of encoding and decoding process, but also increase the precision of solution. Comparing to conventional optimization methods, the camera self-calibration method based on GA can avoid being trapped in local minimum and does not need initial value or gradient information. Several experiments of the camera calibration with the stereo vision show that the proposed method can find approximate optimum solution.
Theoretical and Experimental Study on Exclusive-OR Gate Difference-Frequency Mixer
Authors: Dong Jin Feng , Zhang Wei Yu , Zhang Guo Xiong
Published: October 2011

A difference-frequency mixer based on exclusive-or gates with a filter at the output, which processes a variable frequency input signal and a reference input signal (produced by measurement system) to develop an output signal representative of the frequency difference between the two input signals, was studied in theory and simulation experiments. Digital difference-frequency mixers of this kind can be used in the output signal measurement of resonator-based sensors for high resolution and short measure time.
Performance Analysis of Radar and ESM Track Association Algorithms
Authors: Tu Yong Jun , Huang Gao Ming , Li Jing Hui , Ge Qing Lin
Published: October 2011

Statistical theory and fuzzy analysis are two primary methods of radar and ESM track association algorithms. Absolute-double-threshold rule was used to analyze these two association algorithms. Each algorithm was simulated in this paper. The simulation results show that both of these two track association algorithms have high probability of correct association, but the algorithm based on statistical theory has faster convergent speed and litter samples, while the other is simple, and has less calculation.
A Model of Tactic Threat Assessment in PAAIS
Authors: Yu Hui , Wu Tian Ai
Published: October 2011

The tactical situation assessment is the basis of Mission Planning, Emergency Action Planning, Firepower Assignment and Attack Ordering in PAAIS (Pilot Assistant Artificial Intelligent System). To take into account the current BVR (Beyond-Visual-Range) air combat threat assessment, we proposed a method which used the TOPSIS (Technique for Order Preference by Similarity to Ideal Solution) arithmetic to evaluate the air target threat. Compared to the other threat methods, this arithmetic has the characteristic of simple, computation fast, update expediently and so on. The simulation result indicated that it can respond quickly to the detected targets and satisfy the requirement of situation assessment in PAAIS.
Parameter Design Method of Stepped-Frequency Radar to Suppress Clutter
Authors: Wang Ying , Su Hong Yan , Zhu Huai Cheng , Yuan Qi
Published: October 2011

The stepped-frequency radar can measure the velocity between radar and target as while as obtain high range resolution. The Doppler shift of moving target may make its high resolution range profile move away from high resolution imaging region of stationary target. Consequently stepped-frequency radar possesses the ability of detecting dim target in clutter, which is suitable for attacking low-altitude dim target with low velocity. In this paper, the distribution of clutter is analyzed in frequency domain firstly. Then the design method of signal parameters is put forward based on the analysis in frequency domain. Finally, the simulation results demonstrate the effectiveness of the method.
Research on Relationships among Three Parameters in Short-Term Traffic Flow Forecasting
Authors: Xiao Xin Ping , Hu Yi Chen , Guo Huan
Published: October 2011

This paper expects to get the real-time changes of traffic flow by researching the relationships among the three basic parameters flow, speed and occupancy. we firstly carries out the statistical correlation analysis and grey relational analysis to study the connection between the traffic flow parameters flow and speed, flow and occupancy to get a conclusion that there doesn’t exist a significant linear relationship between neither of the comparisons, and the influence of speed on the flow is a little bigger than that of occupancy. Then we try to establish the binary linear regression model without the intercept and GM (0,3) model to do the data fitting, the final simulation results illustrate that the two methods has effects in some extent, also explain the complexity of traffic flow.