bluuebunny/crossref_metadata_2025 huggingface dataset:
Individualized Online English Teaching Assisted by QQ Webpages
Authors: Sun Dong Ling
Published: October 2014

The thesis gives a report of the creative application of QQ Webpages to improve the studying effects and efficiency of the students after class. It is firstly pointed that education advances with the development of technology, and technology is the productive force of education. Then the thesis gives a brief report of a case study by the present researcher. Also, in the creative construction of the QQ WebPages, it is argued how the technical problems were solved and how QQ WebPages were constructed. Lastly the feedback from the subjects and the summary from the researcher are reported.
Network Management System Design of Education Based on J2EE and JSP Network Framework
Authors: Zhang Hong Chong , He Jin
Published: October 2014

With the rapid development and mature of information technology, the teaching management system also needs to actively explore how to use the new technology to further enhance the level and quality of educational management. In this paper, based on the J2EE theory framework, it builds the basic model of network teaching management system, and implements the development of safety and usability function of the management system by using JSP dynamic management technology. Then it establishes the mathematical model of multi-level target algorithm, and the model is applied in the process of OperationDAO components connection, which has improved the efficiency, safety, and universal applicability of the teaching management system. Finally, the network teaching management system is tested. Through the testing, it indicates that the transmission of system data is stable, which meets the needs of the system function design, and provides theoretical reference for the development of teaching management system.
Research on the Evaluation of Students’ Development Based on Support Vector Machine
Authors: Zhang Li Na , Yang Bo
Published: October 2014

This paper applies SVM theory to the evaluation of student development system, and study on the content of students’ development contains, at the same time establish the evaluation index system of students’ development. Through the use of sample data on the evaluation system for a certain amount of training, we get a trained model, then evaluate and analyze the students’ data to be measured. This approach can make students’ assessment more accurate and reasonable, and evaluation results can be used in scientific. It can be seen from the development point of view, evaluation of all aspects of students' quality, and reduce the error caused by subjective on evaluation process.
Study on the Information Commons Construction of the University Library
Authors: Liu Xiao
Published: October 2014

Information Commons accords with the development direction of the university library services. This paper analyzed the conception of Information Commons and its service features, simply described the construction of Information Commons and issues needing to be concerned.
Reduction of Pesticide Residues on Fresh Vegetables with Chemical Germicidal Water Treatment
Authors: Wang Ying , Harnoode Chokto
Published: October 2014

In this study, we researched the degradation of the 2 pesticides (phorate and chlorpyrifos) by Chemical Germicidal Water (CGW). Degradation effect of CGW on the 2 pesticides in spinach was related with reaction time and available chlorine concentrations (ACC). Our research showed that fresh CGW with different ACC had different abilities to reduce the 2 pesticides (phorate and chlorpyrifos). The degradation effect would be strengthened following with the increase of reaction time and ACC. Compared with tap water treatment, the concentration of phorate has significant decrease (P<0.05), which reach above to 92.5% ,8.8%,4.0% and 2.2% after treated with 5 mg/L,10 mg/L,20 mg/L and 50 mg/L ACC, respectively. What’s more, pesticide residues on fresh spinach after 20 minutes of immersion in 5 mg/L,10 mg/L,20 mg/L and 50 mg/L ACC of CGW reduced chlorpyrifos by 86.5% ,21.7% ,9.8% and 7.4%. Further, the best soaking time for CGW was 20 minutes for reduce the degradation of the phorate and chlorpyrifos . These results indicate that CGW is an ideal candidate for reducing the pesticide residues in the field of food processing industry.
Reusable Electrochemical Biosensor for Sensitive Detection of Single Nucleotide Polymorphisms Based on Gold Nanoparticle Self-Assembly
Authors: Zhang Song Bai , Tang Chun Jiao , Luo Liao Yong , Liu Na , Sun Qin Li , Hu Xia , Liu Xue Wen , Shen Guan Gyu , Lu Ji Lin , Qiu Li Ping , Zhou Shi Biao
Published: October 2014

A reusable electrochemical biosensing strategy based on gold nanoparticle involved layer-by-layer self-assembly for sensitive detection of single nucleotide polymorphisms is proposed in this study. Making use of the strong sulfur-Au affinity, ethanthiol and capture probe modified gold nanoparticles are self-assembled onto the surface of gold electrode successively. The target DNA hybridizes with the capture probe and ferrocene labeled signaling probe successively via sandwich hybridization reaction. By measuring ac current voltammetry, the target DNA can be sensitively detected in a linear dynamic range from 4.1-410 nM with a low detection limit of 2 nM. Making use of self-assembled gold nanoparticles layer, a large amount of capture probes can be modified onto the gold electrode, supporting the high sensitivity of the proposed strategy. In addition, good reproducibility, high selectivity and stability are achieved. In particular, the biosensor can be easily regenerated by melting in hot water, making it reusable.
Study on Hydrolysis of Yeast-Wall with Lytic Enzyme for Extraction of Astaxanthin from Phaffia rhodozyma
Authors: Jian Hua Li , Song Guang Jun
Published: October 2014

Lytic enzyme produced by Bacillus circulans A1.383-2 was proved to be able to hydrolyze the cell wall of Phaffia rhodozyma effectively and make astaxanthin be extractable by the uniform design. When the hydrolysis temperature and pH to modify the yeast-walls were 37°C and 5.0, respectively, and 33ml lytic enzyme (1603.8u.g-1 dry yeast) was added, over 98% of the astaxanthin could be extracted within 16.5h.
Testing of Fiber Contents in Mixture Textiles by NIR Combined with BP Neural Network
Authors: Liu Li , Yan Li , Xie Yao Cheng
Published: October 2014

Textiles are necessaries of human life. The fiber content is index of textile quality and how to measure it has important meaning. A method for testing fiber contents in mixture textiles by near infrared spectroscopy (NIR) was researched. The near infrared Spectra of samples in the range of 4000 cm-1 - 10000 cm-1 were obtained. Noise reduction and compression of spectra data was done by wavelet transform (WT). The reconstructed spectral signals were established based on WT and the correction models based on back propagation (BP) neural network were built. Comparisons between the BP neural network models at different analysis scale and the model of partial least square method (PLS) were given. When the structure of neural network is 11-9-2 for cotton/ terylene mixture samples and 21-13-2 for cotton/wool mixture samples, the best accuracy and fastest convergence speed is achieved. Experimental results have shown that this approach by Fourier transform NIR based on the BP neural network to predict the fiber content of textile mixture can satisfy the requirement of quantitative analysis and is also suitable for other fiber contents measurement of mixture textiles.
The Antioxidant Effects of Germinating Tartary Buckwheat Vinegar
Authors: Li Yun Long , Ma Ting Jun , Li Hong Mei , Hu Jun Jun , Bian Jun Sheng , Shan Fang
Published: October 2014

The present study was to evaluated the antioxidant capacity and the effect to the D - galactose senile mice of buckwheat vinegar which maked by sprouting buckwheat, divided healthy Kunming male mice into blank, positive control, model and three dose groups of vinega made by stirring buckwheat randomly. After 6 weeks, it was determined the activity of antioxidant enzyme and malondialdehyde in mice with different doses groups. The results showed that: the stirring buckwheat vinegar exhibited strong 1,1-diphenyl-2-picrylhydrazyl (DPPH) (IC50 was 0.58*10-2 ) and total antioxidant capacity (210.58 mmolFe2SO4•ml-1 ); the vinegar can droped the level of MDA and improved the activity of SOD in liver of D - galactose senile mice. The low-dose group can improved the activity of SOD in serum. However, for the aging mice, the buckwheat vinegar had no effect on behavior when they were in the new environment, the ability of reduced the activity of TChE in brain and the level of MDA in serum was not significant, at the same time, the activity of GSH-px in the serum couldn't be enhanced.
FEM Study and Characterization on Laser Shock Peening of TC4 Titanium Alloy Structure
Authors: Hu Chen , Qi Hou Jun , Zhang Xing Hui , Che Zhi Gang , Zhang Shu Ying
Published: October 2014

This paper, using the finite element software ABAQUS, establishes the model of laser shock peening (LSP) of TC4 titanium alloy, and analyzes the influence of different parameters on the residual stress of TC4 titanium alloy and plastic deformation. The results show that LSP can make the surface of TC4 titanium alloy have large compressive stress and plastic deformation, hardness and prolong the fatigue life of materials. Laser energy and the impact frequency are the main factor of surface residual stress effects. The multi-point LSP can perform processing enhanced in surface area, and form residual compressive stress on the surface of the material and in a certain depth.
Using the Seldinger Technique Cerebral Angiography (DSA) Line of Intravascular Interventional Treatment for Patients with Care
Authors: Cheng Rui Lian , Yan Mei Xia
Published: October 2014

In the event of cerebrovascular disease, simple medical treatment is very difficult to have expected effect. Interventional therapy is a new type of diagnosis and treatment in cerebrovascular technology, with advantage of less trauma, safer, more curative effect, quicker recovery, and easier to accept. Neurology department in the hospital i belonging to had performed the Seldinger technique cerebral angiography (DSA) for 68 patients with intravascular interventional therapy from January 2013 to January 2014. Through the establishment of special preoperative and postoperative nursing dedicative team, implement the system of process type intensive care good results have been achieved.
An Antenna with High Gain Applied in Grain Moisture’s Measurement
Authors: Wang Hong Wei , Liu Pei
Published: October 2014

When depoting grain for storage, the thickness of grain mass is a vital issue for the purpose of measuring its moisture content. The measurement method is focused on microwave technology, which is to collect the electromagnetic variation data of the amplitude and phase shift from the mass.The proper thickness for the mass is about 5cm and the width is less than 1m. An antenna with a high gain and a saucer-shaped pattern is in great need. This paper provides a 8-element structured antenna array with a gain of over 17dBi, especially with a particular pattern of butterfly shape.The high gain helps to penetrate a thick grain layer, and the butterfly shaped pattern is beneficial to scan more sampling sites from the same facet.The simulation results from HFSS 14.0 are also shown in this paper. When the antenna is hanged over the grain surface at a distance,it is capable to gather more data on moisture content for a wide range of the grain mass. This antenna model really fits the needs of warehousing entry for grain.
Nanomechanical Measurement Methods on the Basis of MEMS
Authors: Luo Feng , Zhang Liang , Zhang Zhi Kai
Published: October 2014

Recently microelectromechanical systems (MEMS) have found increasingly more applications in measurement technique in form of sensors and actuators. Here a report on the development and test of nanomechanical measurement methods and systems on the basis of MEMS will be delivered. A nanoforce actuator, a nanotensile test system which are all realized in the form of MEMS are in the focus. Design and numerical simulation of the nanoforce actuator with the help of finite element analysis (FEA) are detailed . In the article the principle of these measurement systems, the design, the manufacture and the assembly of the MEMS as well as first test results and achieved performance parameters are described.
Laser-Arc Hybrid Welding Properties of Aluminum Alloy 6005A
Authors: Jin Xing Ye , Song Guang  Hao , Zheng Wei Gang
Published: October 2014

6005A extruded aluminum with good heat resistance, corrosion resistance, weldability, also has a relatively high strength, good overall performance, designed to meet the speed requirements of the body. Optional 6005A-T5 aluminum alloy sheet be 11 kinds of process parameters laser - arc hybrid welding, by comparison, select standardized test results carried out to optimize weld joints microstructure, mechanical properties of weld performance analysis.
Target Recognition Technology Based on Wavelet Transform
Authors: Chen Yu , Song Yu Long , Huo Fu Rong
Published: October 2014

Hybrid optoelectronic joint transform correlator is a very effecitve tool to recognize a target, which has important application in military and industry field. However, in actual applications, under some situations, such as complex target background or insufficient contour information etc., the intensity of correlation peaks will be weak. Sometimes, the weak intensity of correlation peaks can not be recognized by joint transform correlator. Wavelet transform is adopted to process the joint target image. The principles of joint transform correlator and wavelet transform are given in this paper. As an actual example, a tank target is adopted to test the feasibility and effectiveness of this method. From computer simulation, we can get good experimental effect. After wavelet transform of joint target image, the intensity of correlation peaks has been increased obviously. Optical experiments confirm the feasibility and effectiveness of this method further. Amounts of experiments prove wavelet transform can extract the target contour effectively. Based on the principle of the proposed algorithm, the target recognizing rate can be increased to a higher level.
Design of Automatic Aerial Air Pollution Monitoring System
Authors: Tang Zhi Wei
Published: October 2014

Based on air pollution situation, make the ball with hydrogen floating in the air height of 50 meters as the aerial air pollution automatic detection mobile platform, based on sensor technology, embedded technology, thrust composite applications, GPRS, GPS and other hardware combined with the lower position machine applications、PC software system , conducted the system requirements analysis, software and hardware architecture design and description. The system solves the common aerial equipment’s problem of letting propeller blown air when detecting air parameters, using aerial balloon floating platform for air-parameter sensor automatically detects collection. Achieve operational automation, thus greatly reduce the work intensity of aerial air pollution monitoring and management, reduce the error of manual operation may occur, improve the efficiency of environmental protection, promote informatization construction of environmental protection work. This paper elaborates the overall design process of aerial air pollution automatic monitoring system.
A Direct Torque Control Driven Vessel Actuator Device
Authors: Jiang Hui Lue , Liu Bo , Liu Chuan Dao
Published: October 2014

Actuator is one of the most important auxiliary mechanisms used to control the ship heading. Focused on the existed shortages of conventional hydraulic driven vessel actuator as complex structure, low efficiency and response etc, by the analysis of torque variation to access the impact of direct torque control and design an actuator used direct torque control of which is simple and easy to implement. Simulation results show that this scheme can reduce system without dynamic performance, low-speed operation to expand the scope of the system, reducing the torque ripple, while improving the low-speed torque of the motor.
A Novel Memristor Chaotic Circuit Based on CFOA
Authors: Hong Qing Hui , Zeng Yi Cheng , Li Zhi Jun
Published: October 2014

In this work, we propose a novel memristor chaotic circuit, which is composed of a current feedback op amp (CFOA) and a piecewise-linear memristor. The dynamic properties of the new circuit are demonstrated, such as system dissipation、equilibrium stability、phase portrait、Lyapunov exponent spectrum and bifurcation analysis. Numerical simulation results show that the circuit produces a class of special chaotic attractors. By adjusting the system parameter, the proposed circuit performs chaotic and hyper-chaotic behaviors from inverse doubling-periodic .
Adaptive Fault-Tolerant Congestion Control via Dynamic Output Feedback
Authors: Bi Song , Zhang Feng Mei , Han Cun Wu , Liu Lei , Sun De Hui
Published: October 2014

This paper presents a fault-tolerant congestion control algorithm for Internet via dynamic output feedback. The controller is designed based on adaptive technique and robust H∞ approach. Simulation result is given to verify the effectiveness of the proposed algorithm.
Analysis and Manufacturing of Conformal Cooling Channels in Injection Mold
Authors: Gao Guo Qiang , Liu Yu Shan , Cai Yu Jun
Published: October 2014

In view of the cooling difficulty in complex injection mold, the difference between conventional cooling channels and Conformal Cooling Channels (CCC) is researched. CCC is superior to conventional cooling channels on cooling effect according to the simulation analysis of plastic flow based on Autodesk Moldflow Insight software. Considered the manufacturing difficulty of CCC, an approach which uses three-dimensional printing and investment casting is put forward in the end.
Characteristic Analysis of Three-Bladed Darrieus Wind Turbine Based on the Multiple Streamtube Model
Authors: Chen Jing Ru , Zhao Zhen Zhou , Li Tao
Published: October 2014

The paper analyzes the effect of airfoil thickness, camber and blade pitch angle on the performance of the three-bladed Darrieus wind turbines. The research results show that the increase of airfoil thickness, camber and pitch angle of blade, can improve power coefficient when the wind turbine tip speed ratio between zero and four. The increase of thickness and camber of the airfoil leads to running tip speed ratio range of wind turbine get narrowed, and reduces the power coefficient when wind turbine runs in high tip speed ratio range. When the pitch angle of blade is 1˚, power coefficient reaches the maximum value. Negative pitch angle has a bad impact on power coefficient and even creates negative power coefficients.
Comparative Research on Attitude Algorithm of the Multi-Rotor UAV Based on the Gyroscope
Authors: Zhang Xin , Yu Lan
Published: October 2014

Obtaining the flight attitude of high accuracy, high reliability is a prerequisite for achieving the autonomous flight of the multi-rotor UAV. MEMS gyroscope can solve attitude angle individually. The paper adopts Euler angle and quaternion algorithms respectively to calculate attitude angle of the multi-rotor UAV. The flight experiment shows that the quaternion algorithm can guarantee the accuracy and the stability of the attitude angle calculation. The root-mean-square errors of the pinch roll and heading angles which are calculated by the quaternion algorithm are 2.947o, 3.606o and 9.769o, which can meet the demand for the autonomous flight of the multi-rotor UAV.
Design and Implementation of Humanized Temperature Control for Hotel Air-Conditioning
Authors: Li Zhi
Published: October 2014

In some star hotels, humanized air-conditioning temperature control has become a necessary condition to improve the service. Obviously, the traditional single function of air temperature control cannot meet this requirement. This paper proposes an intelligent control system for air-conditioning combining, through which users can set desire temperature compared with the actual temperature detected, thus achieving humanized control. The experiments show that the proposed system achieves good results in humanized control of the air-conditioning temperature.
Design and Simulation of Car-Following Control System for Intelligent Vehicles
Authors: Xu Guo Yan , Lin Xiao Min , Ding Neng Gen , Gao Feng
Published: October 2014

To improve the driving safety and comfort during car-following, a hierarchical car-following control system is designed. The upper-level controller determines the desired longitudinal velocity according to the vehicle state information from sensors and the minimum safety distance model based on time headway. The lower-level controller with switch logic between throttle and brake is employed for the longitudinal velocity control. The optimal PID parameters in the lower-level controller are tuned with orthogonal experimental design (OED) method, aiming at minimizing the comprehensive index about safety and comfort. Co-simulations of the car-following system are implemented in the simulation platform based on PreScan and Matlab/Simulink. The following vehicle is controlled to track a leading vehicle with a preset time-varying velocity, ensuring a safety distance between the two vehicles and improving driving comfort. The simulation results show that the car-following control system has a good performance on car-following and is suitable for intelligent vehicles.
Research on Cutting Deformation Mechanism of Hardened Steel
Authors: Guo Pei Quan , Lai Xiao Li , Liu Fen
Published: October 2014

Cutting deformation mechanism of hardened steel has been studied. The influences of the cutting parameter for the chip roots have been researched with single factor testes. The influences of the per tooth feed rate and cutting speed for the shear angle and shear strain also have been obtained by lots of trials, choosing more appropriate axial depth of cut and radial depth of cut.
Design of Control System for Hydraulically Vibrated Processing Tomato Fruit Seedling Separation Device
Authors: Wang Li Hong , Liang Rong Qing , Li Cheng Song , Kan Za , Qin Jin Wei
Published: October 2014

Eccentric style processing tomato fruit seeding separation device exist high machining and assembly precision or other issues. In order to solve this problem, the mode of vibration of hydraulic replaced the eccentric style to drive the fruit seedling separation roller to separate processing tomato effectively. To facilitate adjustment of the hydraulic system, a kind of control circuit PLC as the core was designed according to the actual production requirements. PLC and other elements were selected. The system control signal frequency was initially set up as 1~5 HZ, within the frequency range hydraulic simulation software was used to simulate and analyze the hydraulic vibration system. The result shows that the system rams steady when the input signal frequency range was 1~5HZ.
Moving Object Tracking with Mobile Robot Using Camera and Laser
Authors: Wu Ming , Li Lin Lin , Wei Zhen Hua , Li Cheng Jian , Wang Hong Qiao
Published: October 2014

This paper presents a simultaneous localization, mapping (SLAM) and object tracking (OT) method based on laser and camera data fusion to achieve simultaneous estimation of robot state, environment features states and object’s trajectory in unknown environments. The proposed algorithm is using Full-Correlation Extended Kalman Filter (FCEKF) frameworks, and the system state is combination of robot state, feature states and object state. Object observation is come from two sensors, one is camera and the other is laser. Camshift method is used to get object measurements from camera image, at same time, consistency grid map method is used to get the same object measurements from laser ranger finder, those same object measurements come from different sensor is inputted to FCEKF, and improving robustness and accuracy of system state estimation. The experimental results show that the proposed algorithm is effective to object tracking in outdoor unknown environments.
PLC Application in Carrying Manipulator
Authors: Wang Xin Wen , Wang Feng Lan
Published: October 2014

The robot is the product of the development of science and technology,they are moving towards intelligence, miniaturization of direction.The manipulator based on PLC is more widely used.Manipulator based on PLC makes use of PLC programming control, realizes the manipulator clamping, loosen, left, right, up and down. PLC manipulator, a development trend in the future, not only easy to learn, and more common, easy to operate.
Research on Wide Range and Assembled Slide Rheostat for Electrical Engineering Based on Auto Control
Authors: Li Rui , Qiu Bian , Song Shu Yong , Zhang Yue , Zhang Tong Yu
Published: October 2014

In view of the risk to use the traditional rheostat Slide Rheostat and the contradiction between its range and accuracy, in this paper, designed automatically adjust the rheostat of resistance based on the traditional rheostat, and further study on combination relationship between different range and precision resistor. The host controller and the under controller was designed too. The slide rheostat can solve the existing problems between range and resistance and operational safety, and improve the safety and adjusting speed during operation.
Study on Dynamic Response of Joints Accuracy to the Slider Crank Mechanism of Internal Combustion Engine
Authors: Zhang Fa Jun , Zhu Xin , Wang Shan Shan , Pu Yin Lin , Li Lin Zi , Lin Hui
Published: October 2014

Nonlinear equivalent spring resistance model and Coulomb friction model is used to construct a dynamic mathematical model for a multi-body system, which contains clearance. In the paper an internal combustion engine dynamic model has created for simulated analysis. It shows that joints accuracy and driver speed have obvious effects on crank slider dynamic disturbance. Also joints clearance and the increase of driver speed lead to lower positional accuracy, worse stability and reliability, which has very important theoretical significance and practical value on the analysis of the performance of internal combustion engine.
Selective Esterification of Ethylene Glycol Ethyl Ether over Silica-Cerous
Authors: Wang Yong Jie , Zhu Shi Yao , Zhang Geng Qiang
Published: October 2014

With silica-cerous of high activity as catalyst, ethylene glycol ethyl ether acetate was synthesized from ethylene glycol ethyl ether and acetic acid. The proper conditions for the synthesis were obtained by a single factor experiment and orthogonal experiment. Based on 0.3 mol acetic acid, the optimum conditions were as follows: the mass ratio of silica-cerous (15% loaded sulfate cerous) / acetic acid being 0.056 : 1, the mol ratio of acetic acid / ethylene glycol ethyl ether being1 : 1.2, the amount of cyclohexane being 30 mL, reaction temperature being 90 °C, and reaction time being 2 h. Such optimal conditions give the highest yield of 99.53 % and selectivity of 100 % of ethylene glycol ethyl ether acetate. Its structure was confirmed by IR, and the catalyst still has high activity after being reused for five times.
The Design of the High Tension Line Mechanical Deicing Unit
Authors: Shao Ming Xi
Published: October 2014

In recent years, our country south parts of the rain and snow freeze disaster occurred frequently, which resulted in increased surface of the transmission line icing, gravity, high voltage transmission line widespread damage. In order to avoid the high tension line crushed, to guarantee the normal electricity, you need to clear the ice on the high tension line in time. Through the analysis of all kinds of existing de-icing technology advantages and disadvantages, put forward in this paper, the high tension line of mechanical deicing unit. Paper first puts forward the overall scheme of deicing unit needed to solve in the design of the main problems, and then expounds the axis and in addition to the design and calculation of the ice skates finally, and locking mechanism and regulating mechanism and so on the design of mechanical parts.
Design of Energy-Saving Piezoelectric Actuator Drive for High Frequency Servo Valve
Authors: Pan Wei , Lu Chang Hou , Liu Zi Chao
Published: October 2014

The paper presents a circuit topology favorable to drive piezoelectric actuators for high frequency servo valve. It begins with a short overview of different energy-saving PZA drive types and their tradeoff between efficiency and circuit complexity. Then the mechanical structure and equivalent model of the piezoelectric servo valve are described. And the circuit topology including an energy-saving oscillator, an efficient DC bias power and a repetitive controller especially for tracking reciprocating motion, is proposed. The efficiency-improved PZA drive is then derived from the above design. Finally, the drive together with the servo valve is tested in the simulation experiments.
The Design of Mine Hoist Speed Regulation System Based on Ziegler-Nichols PID Control
Authors: Dai Yue Ming , Qiao Shu Yun
Published: October 2014

In this paper, a method based on Ziegler Nichols - frequency response of the adaptive PID controller is proposed. The control circuit online identify important critical frequency response characteristics of process object through input and output data in the normal process operation, and then the system online update PID controller parameters based on Ziegler - Nichols tuning rules or by the improved method. The adaptive process of PID controller does not require any prior knowledge of the system, but it can always guarantee control circuit run in the best condition . The results show that the method has stronger robustness and adaptive ability.
Optimization of Processing Conditions and Properties of Epoxy Microcapsule
Authors: Cai Xiu Lan , Fu Da Tian , Qu Ai Lan
Published: October 2014

A series of microcapsules were prepared by interfacial polymerization method using epoxy and urea formaldehyde resin as core material and shell material, individually. The effects of processing conditions on the properties of epoxy microcapsules were systematically investigated based on w(Core), average diameter and decomposition temperature of microcapsules through the method of orthographic factorial design and the most optimum processing conditions were included. The results indicated that core/shell mass ratio was the most important factor on w(Core), average diameter and decomposition temperature of microcapsules. The optimum processing conditions were concluded: 1:1 for the core/shell mass ratio, 300 rpm for agitation rate and 0.8% DBS as emulsifier. The microcapsules prepare in the optimum processing conditions were well encapsuled and presented thin shell and smooth surface. Moreover, the addition of 10% microcapsules can improve the mechanical properties of epoxy matrix greatly.
A Novel Multilevel Inverter Using Vector Control Method
Authors: Yu Tao , Xu Qi Lei , Park Sung Jun
Published: October 2014

In this paper a novel space vector control method is proposed here. It can be used in the multi level inverter consists of low frequency transformers. The proposed method is entirely based on the programming way and is different with the conventional method. It has the following advantages: similar response time with the conventional method and flexible expansion.
Research on the Multimodal Interaction System Based on Reception Robot
Authors: Miao Wei Ying , Wang Xi Meng
Published: October 2014

Multimodal interaction system is designed to reduce the burden of user awareness, providing convenient and efficient human-computer interaction environment. This paper attempts to combine reception robot and multimodal interaction system to broaden the research field of multimodal interaction system. By analyzing the characteristics of the reception robot itself, combined with the design principles of multimodal interaction system, we designed the reception robot’s multimodal interaction system. It has tried action, voice, appearance and other aspects on vision, auditory, tactile and other channels, has a certain significance.
The Design of Radar Automatic Fault Detection System Based on Virtual Instrument Technology
Authors: Zeng Xian Lin , Zou Tao , Peng Jian Hua
Published: October 2014

With the development of computer technology, the intelligent technology and the virtual instrument technology is becoming more and more important in the testing field, the radar automatic detection system described in this article concludes virtual instrument system, detection platform and troubleshooting software. The system can individually and comprehensively and quickly check the performance of the equipment for automatic diagnosis, greatly improving the technical support capabilities of the equipment. Functionally, it can be easily expanded and upgraded, with a high value of promotion and application prospects.
The Design of Monitoring System for Bridge Cable Tension Based on ARM
Authors: Du Chun Wei , Chen Xue Li , Xia Chun Mei
Published: October 2014

The paper illustrates the monitoring system of cable tension of bridge based on ARM. The system, consisting of wireless sensor nodes, the gateway node and ARM-based system, can implement many functions, such as real-time monitoring, data storage and display, historical data query and alarm of exceeding standard. In addition, such a system, verifying simple structure, low power consumption and reliable performance, has broad prospects in the filed of monitoring system of cable stress of bridge.
Development of Compact Versatile Acquisition Platform for Wireless Sensing Applications
Authors: Huang Wu Huang , Kreil Matthias , Cheng Jing Yuan , Wang Bing , Zhou Bo , Lukowicz Paul
Published: October 2014

In this paper we present a compact and versatile acquisition platform designed by modularized method, which is useful and flexible for various sensing applications (such as mechanic detection and ubiquitous computing) thanks to the combination of high resolution analog-to-digital converter (ADC), low power consumption and exchangeable wireless transmission. The 31*45 mm2 module supports simultaneous acquisition on maximum 8 channels with an effective number of bits (ENOB) of 20.9 at most and a sampling rate of up to 32KSPS each. Also we implement two popular modes of wireless transmission featuring high data rate and low power, namely a transmission rate of 21.3Kbps using Bluetooth low energy (BLE, power consumption 30mW) and 263Kbps using WiFi (723mW). Additionally, two typical wireless sensing applications, floor vibration detection and electrocardiograph (ECG) signal acquisition, are tested to demonstrate the performance of this platform. Results show that the characteristic of this platform can primely satisfy the requirements of these applications featuring high resolution, low power and high-efficient wireless data transmission, which is greatly helpful for exploring-stage experiments in wireless sensing application cases.
Coal Dust Recognition Based on Concave Point Extraction and Ellipse Fitting
Authors: Zhang Wei , Yi Hong Bo , Wang Xiao Wen
Published: October 2014

A new coal dust particle recognition algorithm based on concave points extraction and ellipse fitting is proposed for the features of irregularities and particle overlap. The new algorithm includes contour processing and ellipse fitting in this paper. In the part of contour processing, the feature points are obtained with polygonal approximation on the edge of a binary dust particles image, and then concave points of overlapping particles are extracted by the method of angle combined with size, finally the edge is segmented by concave points. To solve the problem that direct least square ellipse fitting is easily affected by noise points, bare bones particle swarm optimization is introduced to find global optimum fitting parameters and the segmented edge is ellipse fitted. Experiment results show this proposed algorithm obtains better recognition performance.
Determining the Region of Single-Target Interest Area by Prediction Method in Wireless Multimedia Sensor Networks
Authors: Zhang Huan , Zeng De Wen , Wang Wen Tao , Li Jian Jun , Wang Wei , Fan Xiao Ping
Published: October 2014

Gray values have always been altered in images collected by wireless multimedia sensor networks because of changes in light, weather and other conditions of monitored environment. In this case it may lead to the non-interest areas in the images to be misjudged as interest areas. If there are only a small number of pixels that have been affected in an image, the probability of misjudgment is smaller. However, if the affected pixels are massive, the difference method may judge many of non-interest areas as interest areas by mistake. This will increase the energy consumption of image compression process. Besides, it would not help to improve image quality. Therefore in the case of fixed reference frame, when there is an abrupt change in background environment, and only one concerning target in the image, we propose a method to predict the interest areas of current frame image by using the interest areas of history frames and the movement trend of the moving target. Binary-conversion based on the interest area and background area on the previous two historical frames. By using the connected component labeling algorithm based on run-length coding a single-target interest area can be determined. Predictor is determined according to coordinates’ extremes of two frames, and then the interest area of the current frame is predicted according to the previous frame and the predictor.
A New Image Denosing Method via Variable Splitting Gradient Projection for Constrained Total Variation with Sparsity
Authors: Liao Fan , Wu Jia Song , Ouyang Jun Lin , Coatrieux Jean Louis , Shu Hua Zhong
Published: October 2014

The total variation (TV) models have been successfully used for image denoising problem, but most of them usually smooth out the details while removing the noise. In this paper, we propose a new image denoising method that incorporates the sparsity priori information into the traditional TV models. We then solve the optimization problem by combining the variable splitting and dual approaches. Our method can be applied to both isotropic and anisotropic TV models. Experimental results show that the proposed method outperforms the existing methods.
Design and Implementation of Test Case Selection Based on Map Reduce
Authors: Liu Yu Lin , Wang Yan , Zhou Jian Tao
Published: October 2014

In the traditional software testing, a large collection of test cases of the tested system automatically generated , in the process of actual execution, all of the test cases are executed is not possible. Normally, we test a certain function of the tested system, so choosing the test cases about a certain function is very important. This paper focuses on solving the problem of choosing test cases about a certain function of the tested system based on CPN model, the method which is based on purpose is used in this process. In the process of test cases selection, there are a whole lot of repeated calculation and operation, this characteristic just can make it combined with the parallel advantage of cloud computing. In summary, this dissertation focus on the test cases selection problem, using MapReduce programming on Hadoop platform, a test case selection tool is designed to improve the efficiency and service capabilities of test selection, the result of the experiment is consistent with the expected result.
Simulation Data Lifecycle Management Based on Engineering Flight Simulation Platform
Authors: Yang Peng Lin , Xu Hong , Shen Wei Qun
Published: October 2014

Lifecycle management has been a hot spot in software engineering research domain. This paper tries to manage simulation data with the concept of lifecycle management, and then presents the concept of SDLM (Simulation Data Lifecycle Management). Meanwhile, the model of extended hyper graph core data which is used to implement SDLM and the way to build it were presented. All the work is in the background of engineering flight simulation platform.
Numerical Investigation of Flow in an Asymmetric Plane Diffuser Using a Multi-Scale Turbulence Model
Authors: Shi Zhong , Li Zhi Qiang , Gao Ge , Dong He , Guo Jian , Tang Wen Dong
Published: October 2014

The flow in an asymmetric plane diffuser was simulated using both the multiscale turbulence model based on the variable interval time average method and the standardk-εmodel based on the Reynolds average method. The numerical method used in this simulation is an unstructured staggered mesh scheme. The capability of the multi-scale model to simulate flow in an asymmetric plane diffuser has been validated. Pressure coefficient, frictional resistance coefficient and mean velocity profiles downstream are in agreement with experiments. Moreover, the results predicted by the multi-scale model are better than that predicted by the standardk-εmodel. The computational results show that the multiscale turbulence model can successfully simulate this type of separated flow.
Strength Analysis of Diesel Engine Crankshaft Based on Flexible Multi-Body Dynamics
Authors: Wang Ling Jin , Li Dan , Lu Xiu Xia , Li Pei Fan , Jia Ying Jun
Published: October 2014

Crankshaft is one of the key parts of the diesel engine. Several causes would be lead to the failure of the crankshaft. A novel strength analysis method is used for crankshaft high cycle fatigue simulation of the diesel engine based on flexible multi-body dynamics in this paper. In order to investigate the fatigue strength of other parts of the diesel engine at the same time, a complete coupled dynamic model of diesel engine crankshaft and block is built and coupled dynamics simulation is carried out. Then dynamics calculation results of each part is extracted for high cycle fatigue analysis and the reliability research of the crankshaft, The simulation results show that, the minimum safety factors of the crankshaft is 1.301, it meet the strength requirements, the safety factors of the block and the cap could be calculated at the same time. These suggest that this method can guide the design of the diesel engine crankshaft and has gained significant importance in practical study.
An Novel Computational Method and Application to Reconstruction of Dynamic Loads on a Plate
Authors: Wang Lin Jun , Cao Hui Ping , Xie You Xiang
Published: October 2014

We propose an novel computational method for solving dynamic loads identification problems. The algorithm considered here is detailedly given. The present method is applied to the identification of the multi-source dynamic loads on a surface of plate. Numerical simulations validate the stability and effectivity of the proposed method.
Influence of Dropper Spacing on Quality of Pantograph-Catenary Current Collection
Authors: Yu Mei Li , Liu Wen Zheng , Zhang Jian , Yan Cai Ying
Published: October 2014

Elasticity variations in railway overhead contact line would lead to the fluctuation of contact force between pantograph and contact wire and produce a negative effect on the stability of current collection. Dropper distribution is one of the key factors affecting the elasticity of the contact wire. In this paper, the influence of dropper spacing on elasticity and quality of current collection have been studied using finite element analysis method by simulation. By analyzing the changes of elasticity value and contact force under different conditions of dropper distribution, the effect laws of dropper spacing on the contact wire elasticity and the quality of current collection under the speeds of 300km/h, 350km/h and 400km/h have been obtained.
Vertical Planting Structure Design for Planter
Authors: Zhang Deng Quan , Wu Yan Juan , Zhang Chuang Kai
Published: October 2014

In view of many garlic drills without vertical planting structure so far, garlic clove cannot be vertical planted. A new design of vertical planting structure is proposed. The gripper for fixing garlic clove is designed. Moreover, the accurate cooperation is realized both transfer and vertical planting for garlic clove. Garlic clove is vertically inserted into the appropriate depth soil using the proposed machine. The structure of the proposed device is simple. It is convenient also to operate the device. The whole design of device is clever and cooperate appropriately. It can automatically operate from garlic clove fixing and transferring to garlic clove upright planting into appropriate depth soil. The effectiveness and feasibility of the proposed device is proved by lots of experiments. The result shown that the proposed device greatly improve plant efficiency, greatly improve the garlic budding rate, and effectively prevent the phenomenon of abnormal buds.
Thermal Economic Analysis of Desuperheating System in Large Scale Power Generation Unit
Authors: Deng Jian Ling , Fu Peng , Wang Ning Ling , Yang Yong Ping
Published: October 2014

The desuperheating water can affect the thermal economy in a power plant. Based on the equations of mass and energy balance equations for steam-water distribution, the calculation model for the thermal economic performance of the thermal system in a coal-fired power plant was established. And this model was used in a 1000MW ultra supercritical coal-fired power generation unit under different conditions with varying flow of desuperheating water (DW). The results show that the DW of reheater has larger impact on the thermal economic of power unit than that of superheater.
Graphic Method Profiling of the End Mill Cutter Generating the Screw Compressor Rotor
Authors: Popa Camelia Lacramioara , Popa Viorel
Published: October 2014

Helical rotors, components of screw compressors have different structural shapes: rotors circular front section, rotors elliptic front section or asymmetric rotors. Manufacturing rotors involves profiling a tool bordered by a revolution surface, enveloping of each helical channel. This paper proposes a method developed in AutoCAD, in order to determine the profile of end mill cutter which generates the helical channel. Graphic method is based on the principle of complementary theorems' "Substitute Circles Family Method" component of envelope surfaces theory.
V-Beam Thermal Actuator’s Performance Analysis Using Digital Image Correlation
Authors: Chiorean Radu , Dudescu Mircea Cristian , Pustan Marius , Hărdău Mihail
Published: October 2014

This paper analyses the influence of the V-beam thermal actuator’s geometrical parameters on its mechanical behavior. Experimental measurements were performed using Digital Image Correlation (DIC), which is a gray scale value tracking algorithm that evaluates the position shift of a pixel between at least two images taken at different deformation stages. These results are compared to multi-physics simulation data obtained using Finite Element Analysis (FEA) as well as to analytical values based on the electro-thermal and thermo-mechanical presented models.