bluuebunny/crossref_metadata_2025 huggingface dataset:
Study and Design on the Automatic Drying Machine of Spinneret
Authors: Wang Dong , Zhou Yang , Yang Chong Chang
Published: June 2014

This paper introduced spinneret cleaning technology. Aiming at the probles of noisy, low-efficiency, high-intensity, artificial drying in actual spinneret drying process of the factory, the process of spinneret automatic drying is studied and an automatic spinneret drying machine is designed. An experiment is conducted on the prototype of the machine, which shows that the work efficiency has increased dramatically and the noise has decreased obviously.
Iterative Learning Impedance Control for the Robot
Authors: He Jin Bao , Yao Zhan Wei , Luo Zai Fei , Li Guo Jun , Zhou Shi Guan
Published: June 2014

In this paper, an iterative learning impedance control(ITLC) algorithm is proposed. We designed an adaptive impedance controller that can be modified using iterative learning method. Moreover, the convergence of the proposed robot system is proven using the Lyapunov function to guarantee the global convergence of tracking error. Finally, by simulating and comparing the proposed learning impedance control scheme with that of the traditional impedance control, it confirms the effectiveness of ILIC .
Finite Element Analysis of Contact Stress for Herringbone Gear
Authors: Li Ke
Published: June 2014

Use UG to model and assemble herringbone gear. Through the ANSYS Workbench software, the engaging characteristics of the static state herringbone gear assembly model were confirmed and the analysis was executed to verify the gear design rationality.
Abiot: A Low Cost Agile Sonic Pest Control Tricopter
Authors: Quan Lei , Wang Fang , Li Rong
Published: June 2014

In this paper we introduce the concept of an agile electronic pest control intelligent device for commercial usage and we have evaluated its performance in comparison with other existing similar technologies. The frequency and intensities are changed with respect to the target pest however human behavior has been found to be inert with their exposure. The unit has been tested in lab conditions as well as field testing done have given encouraging results. The device can be a standalone unit and hence work for small scale viz. kitchen garden on the other hand multiple devices acting in coordination with each other give the desired output on a larger scale. Lastly, we chose a tricopter over the wider used quadcopter for greater yaw and agility. The work was funded by IEEE under AiyeHum – 2012 and the prototype was successfully built and tested. The system response effectiveness was found to 86.5% up to a distance of 15 meters.
Research on Size Synthesis Optimization Design of a Bionic Exoskeleton for Index Finger Rehabilitation
Authors: Meng Qing Yun , Tan Shi Li , Yu Hong Liu , Meng Qiao Ling , Yi Jin Hua
Published: June 2014

This paper presents a novel wearable robotic hand exoskeleton named ReHand-II for post-stroke rehabilitation. To ensure the consistency of rotation between exoskeleton joints and index finger joints and to realize reasonable range of movement, the kinematics models of left index finger and the exoskeleton are established. And design variables,constraints and objective function are determined. The size synthesis optimization design is realized. Ultimately the size value of each component parameter is determined. The hand exoskeleton is developed according to the results of the optimization. Finally, ReHand-II shows better bio-imitability and Wearable adaptability by wear experiment results.
The Direct Kinematics Solution of the 6-RSPS Simulator Platform with BP Networks
Authors: Li Jian Jun , Yang Chun Jie , Sun Wei Hong
Published: June 2014

A new structure of 6-RSPS simulator platform which can be rotated infinitely is presented. The solution of direct kinematics problem of parallel structure is the fundamental problem. For the solution of this problem, according to the links vector diagram, the relationship of the position and orientation of the platform between the length of links and the rotate angle of the under-hinge is derived. BP network is applied, then using the previous data obtained by inverse kinematics as the training data and testing data of BP network, the direct kinematics solution is obtained. Simulation results verified that the solution of direct kinematics applied the BP network can be meet the requirements completely and the error percentages are within the acceptable range.
Design and Modeling of a Biomimetic Stingray-Like Robotic Fish
Authors: Wang Yang Wei , Tan Jin Bo , Gu Bao Tong , Sang Peng Fei , Zhao Dong Biao
Published: June 2014

Freshwater stingrays employ enlarged undulating pectoral fins as their routine propulsion means. Their remarkable flexibility and maneuverability have provided many new inspirations for engineers. In this paper, a biomimetic stingray-like underwater robot was introduced. In order to investigate the mechanism of the undulatory propulsion, kinematic analysis and hydromechanics analysis were conducted. Lastly, underwater experiments were carried out to study the swimming performance of the robotic fish.
Method of Optimization Design of Permanent Magnet Retarder
Authors: Huang Yi Qi , Li Xiao Feng , Chen Yuan , Jiang Yu
Published: June 2014

This paper introduced the method of multidisciplinary design optimization. The conceptual model of permanent magnet retarder was developed to maximize the brake torque of the permanent magnet retarder. The influences of magnetic field parameters, structural design parameters, rotor parameters and permanent magnet temperature parameters on the behaviors performance of the permanent magnet retarder were discussed. The design variables included the radial width and the axis length of permanent magnet, the number of permanent magnet, the radius of rotor, the thickness of rotor, and the air gas. The multidisciplinary design optimization in this paper is an effective method for the global design optimization of the permanent magnet retarder.
Tractor-Semitrailer Stability Integrated Control Based on TruckSim-Simulink Co-Simulation
Authors: Wei Chao Yi , Long Zhi Yu , Xie Lei , Xie Min Yan
Published: June 2014

A nonlinear tractor-semitrailer simulation model is established based on TruckSim. The control system which is designed in Matlab-Simulink contains roll, yaw folding and ABS integrated control strategy. A TruckSim-Simulink co-simulation model is constructed, and is based on which, tractor-semitrailer stability integrated control is simulation tested by a fishhook condition. The results reveal that the control system is effective. The proposed control scheme can significantly reduce the accidents of roll, jackknifing and yaw loss of control of a tractor semi-trailer, improving the vehicle driving stability.
Research on Positioning Control of Pneumatic-Hydraulic Intensifier
Authors: Yang Xin Jun
Published: June 2014

The properties of hydraulic driving are good speed-load characteristics, anti-forward rushing and accurate positioning at any location. While the properties of pneumatic driving are clean, efficient, fast. All the advantages of hydraulic and pneumatic driving can be combined in Pneumatic-hydraulic intensifier. So it is widely used in varies fields. Its very important to control the position of Pneumatic-hydraulic intensifier. In this paper, a Fuzzy self-tuning PID controller was designed and simulation experiment was done. Simulation results show that the controller performs well.
Research and Implementation of Tool Space Compensation Technology of Five Axis CNC Machine
Authors: Li Chuan Jun , Liu Qiang , Liu Huan
Published: June 2014

This paper analyzes the structure and classification of five-axis CNC machine, According to the nonlinear error analysis, tool center point and put heart point location model is established and derived the space of five-axis CNC machine tool cutting tool length compensation algorithm formula;Combined with two-dimensional CNC machine tool compensation principle and Kinematics Transform Algorithm (KTA) formula the same radius compensation algorithm formula is deduced, and within the scope of linear error analysis verified the result of the algorithm.Cutter compensation technology provides a method for the space.
Study on Tool Path Generation and Direct Interpolation Method
Authors: Chen Liang Ji , Li Hui Ying , Zhang Hai Jun
Published: June 2014

At present, Non-Uniform Rational B-Spline (NURBS) curves are mostly used to generate arbitrary contour of a complex shape in the CAD field. In this article, a new method with NURBS technology is presented and realized in a location and federate controlling system. In the method, the tool paths and the cutter locations (CL) were represented into NURBS curves based on the same knot vector. The above CL data was firstly calculated and then transformed to five motion commands of five axes of machine through the real-time post-procession algorithm. The acceleration/deceleration controlling method is also presented to avoid the impact of machine. The proposed 5-axis spline interpolation method is realized and the experimental result of machining shows that the method is valid.
Graphical Fault Diagnosis Expert System of CNC Machine Tool Based on B/S
Authors: Shen Bin , Zhao Shu Yu , Wang Jia Hai , Fleischer Juergen
Published: June 2014

Based on the authors previous work of developing an expert system for fault diagnosis of CNC machine tool, this paper studied the theory and method of CNC remote fault diagnosis expert system based on B/S, and presents schema and structure of the expert system in detailed. Case based reasoning is used for the multi-alarm diagnosis, and rule based reasoning is used for single-alarm diagnosis. At last fault diagnosis expert system was designed and developed making use of C# and ASP.NET.
Design of Real-Time Large Field Video Display System Based on FPGA
Authors: Chen Jiang Bo , Qiao Yong Ming , Hou Zhuo Wei
Published: June 2014

In order to realize the large field or view digital video images into PAL format analog video output,this article introduce a real-time display system of large visual field in the basis of FPGA. Apply the EP2S30F672I4 chip of the StraixII series to be the core processing unit, which is from the Altera; and the CSC12M25BMP19 camera, from the Teli, to be the image data source, with 25 Hz of output frame rate and a resolution of 2048 x 2048 on images. The Cameralink interface is adopted to be the data transmission channel between the camera and interface card, which carries out the configuration of the camera, image data acquisition, caching, image reduction and PAL format conversion, and finally accomplishes the image real-time display.This paper discusses the FPGA implementation of double bilinear interpolation algorithm, including image data frames buffer, the vertical and horizontal interpolation. The experiments results show that our expects are achieved by the algorithm and the hardware implementation.
Design of Embedded Software Reliability Testing Scheme and Protocol for Intellectual Ammeter
Authors: Gao Xin , Wang Ping , Zhao Bing , Liu Ying , Huang Nan
Published: June 2014

Currently embedded software reliability testing of intellectual ammeter is through software comparison, which has poor scalability and can’t detect software’s fault tolerance ability after failure in running scene. In this regard, this paper presents a detection platform’s construction scheme for intellectual ammeter software reliability testing and designs testing communication protocol based on Ethernet master-slave mode. Experiments prove that the testing protocol possesses high usability and flexibility, and has value for intellectual ammeter software testing.
3D Magnetic Field and Temperature Rise Analysis of Dry-Type Transformer Based on Finite Element Method
Authors: Xu Hui , Yin Zhong Dong
Published: June 2014

Dry-type transformer is a high electric strength, high mechanical strength and high heat intensity transformer. With the acceleration of our city and countryside grid construction and the energy saving requirement in power industry, the application of dry-type transformer is expanding. Also, society proposes a higher standard in dry-type transformer. To improve its working capacity and reduce power loss further, we need to analyses its inner working conditions. This thesis uses finite element software ANSYS to build a model of dry-type transformer and gets its power loss and temperature distribution under different working capacity. After comparing this simulation results with experimental results, the accuracy of simulation method is proved. This simulation provides a structure optimization method of dry-type transformer. It can reduce design cycle and cost, help to spread the application of dry-type transformer.
A Study of Self-Adaptive Front Vehicle Recognition Algorithm Based on Multi-Features
Authors: Xu Mei Hua , Xia Chen Jun , Zheng Huai Meng
Published: June 2014

With the development of intelligent driving technology, recognition the vehicle in front of our cars became the hotspot in the field of intelligent driving research. This paper presents a self-adaptive front vehicle recognition algorithm with some unique improved method on the basis of analyzing and comparing the popular vehicle detection algorithm of domestic and foreign. Using the gray feature, vehicle shadow feature, taillights feature, license plate color domain feature and other features, the recognition algorithm can detect the vehicle in front of cars effectively, find out the safe passage area and avoid the potential risks. Finally, the feasibility of the algorithm is verified by experiment results with MATLAB tools.
Adaptive Background Image Calculation for Video Sequences Based on Optical Flow
Authors: Zhu Hui , Ji Xiao Peng
Published: June 2014

A new method is proposed to calculate the background in video sequences. The optical flow is estimated to determine the local regions occupied by moving objects. The background image is calculated by an efficient averaging process excluding the moving object regions, which overcomes the foreground-occluding problem in direct averaging method for background estimation. The experiments for traffic video processing prove the method’s effectiveness and robustness.
The Application of Image Processing in Medical Detection Technology
Authors: Wan Li Peng , Li Tian Cai , Li Gui Qin , Ruan Bin
Published: June 2014

The saliva pregnancy test apparatus is dependent on manual operation to obtain results by observing the saliva crystallization image with complex operation, how to recognize the saliva crystallization image quickly and accurately has become an important research topic. In this paper, an image recognition method on the crystallization of saliva is proposed. Firstly, gray processing on the original image, improved Otsu method is used to select the threshold and binaryzation. Then the proportion of black and white pixels is calculated to identify saliva crystal images with the percentage values. The results show that the method is simple and treatment results are accurate.
Improved Algorithm for Wavelet Threshold Denoising and Application in Crack Image Recognition
Authors: Li Hai Biao , Xia Xin
Published: June 2014

In crack image recognition, Donoho’s universal wavelet threshold de-noising method appears "over-kill" phenomenon due to the lack of self-adaptability of threshold value; hence the image may lose its edge details. To handle this problem, the Donoho’s universal threshold and threshold function are improved and an adaptive determination method of threshold coefficient is introduced in this paper. Experimental results shows that the proposed method can effectively remove digital image noise and achieve a better edge protection, higher edge preservation index, better visual effects and higher peak signal-to-noise ratio.
An Improved Rapid SURF Algorithm Based on Region of Interest
Authors: Liu Ya Jun , Wan Ren Quan , Wang Zhong Ren , Jiang Chang Cheng
Published: June 2014

The purpose of this paper is to research application of speed-up robust feature (SURF) based on the region of interest for workpiece matching and positioning. Thresholding is a simple but important method to perform image segmentation. In order to reduces the complexity of the data and simplifies the process of recognition, the image is segmented by threshold value method which eliminates and suppresses useless information of image background. The image matching algorithm shows a better performance on real-time than the standard SURF and it succeeds in accelerating the speed of image pre-processing before image matching. In addition, the good robustness and adaptability of SURF are maintained. Compared with the traditional algorithm, improved algorithm enhances the efficiency of vision inspection system and can be used in other applications of image matching.
View-Invariant Face Detection for Colorful Image
Authors: Zhang Hua , Wang Li Jia , Wang Zhen Jie , Yuan Wei Yi
Published: June 2014

To overcome illumination changes and pose variations, a pose-invariant face detection method is presented. First, an illumination compensation method based on reference white is presented to overcome the lighting variations. The reference white is obtained according to the component Y from YCbCr color space. Then, a mixture face model is constructed by the Cb and Cr from YCbCr color space and H from the HSV color space to extract faces from colorful image. At last, an eyes model is designed to locate eyes in the obtained face images, which can distinguish face from neck and arms ultimately. The presented method is conducted on the CASIA face database. The experimental results have shown that our method is robust to pose changes and illumination variations, and it can achieve well performance.
The Key Technology Research of Kinect Application in Sport Training
Authors: Che Yan Long , Lu Zhong Jin
Published: June 2014

The traditional sports training coach is one-to-one or one-to-many face-to-face training, it not only take the limitation of time and place, but also the high cost of training, coach resources nervous. In order to solve this problem, a growing number of professional sports training or national training began to apply motion capture to sports training. Kinect through the accurate grasp athlete body contour and body position to determine the position player action, and action corresponding to the role of sports training or operation. This article is based on motion capture device, combined with the feature of sports activities, to provide effective solutions for sports training, so as to enhance the level of sport athletes.
A Survey on Solar Image Segmentation Techniques
Authors: Fan Yuan Yuan , Li Wei Jiang , Wang Feng
Published: June 2014

Image segmentation is one of the basic problems of image processing, also is the first essential and fundamental issue in the solar image analysis and pattern recognition. This paper summarizes systematically on the image segmentation techniques in the solar image retrieval and the recent applications of image segmentation. Then the merits and demerits of each method are discussed in this paper, in this way we can combine some methods for image segmentation to reach the better effects in astronomy. Finally, according to the characteristics of the solar image itself, the more appropriate image segmentation methods are summed up, and some remarks on the prospects and development of image segmentation are presented.
A New Method to Explore the Marine Topography by Gravity Gradiometry
Authors: Ji Bing , Bian Shao Feng , Wang Zhi
Published: June 2014

It is very dangerous for AUV and other vehicles to traverse through the ocean, where there are many barriers. Some technologies such as active sonar and blue-green lasers can not be used to explore these barriers in some special realm, because signal is sent out during the exploring. In order to solve this problem, a new method by using the character of the submarine topography will engender gravity gradient is proposed. An example of calculate the gravity gradient of a subulate topography is given, from the example can find that the gravity gradient aroused by the barrier is very large and can be observed by the gradiometer easily, the result proved the method of this paper is feasible. This study provided a new method for the underwater carrier to avoidance collision, and the method has passive and all-weather characters.
A New Compressed Sensing Image Transmission Scheme in Wireless Sensor Networks
Authors: Yang Ming , Wang Zhong Gen , Zhang Liang
Published: June 2014

If the nodes in a multi-media data transmission system can not meet low power in traditional wireless sensor networks (WSNs), it will greatly reduce the network life cycle. On the basis of quantized compressive sensing (QCS), this paper presents a communication model which can analyze the impact of uniform quantization coding and Hoffman coding on image’s transmission and reconstruction. According to the prior probability of image measurement, this paper proposes a novel scheme for non-uniform quantizer.The simulation results show that the multi-media data transmission system can obtain images effectively and reduce the distortion by using the proposed scheme.
The Research on Measurement Accuracy of RIM-FOS
Authors: Jin Yuan Qiang , You Liang
Published: June 2014

There are many factors that can effect on accuracy of reflective intensity-modulated fiber optic sensor (RIM-FOS). Operational object is a major element among them to fiber optic sensor, which is used in measurement of dynamic and static clearance of steam turbine, studied in this topic. For this reason, this letter researches on scattering characteristic of light on surface of medium and distributed function of outline of medium’s surface, and computes and analyzes on their effect on measuring. All of above are benefit to improve accuracy of this kind of sensors.
Development of Piezoelectric Three-Dimensional Dynamometer for Φ300mm Wafer Grinder
Authors: Zhang Jun , Wang Wei , Qian Min , Kang Ren Ke , Ren Zong Jin
Published: June 2014

Due to the requirements of on-line detection of grinding force in the grinding process, this paper utilizes the structural characteristics of ultra-precision grinder with double-spindle and single-workstation, and then presents a grinding dynamometer based on piezoelectric effect of quartz crystals. Besides, the grinder dynamometer can measure grinding force in three directions, and the static properties of dynamometer are experimentally tested in a special experiment table. Moreover, the on-line static calibration and the actual grinding experiment of dynamometer installed in the silicon wafer grinder are performed. The results indicate that the grinding dynamometer has satisfactory static properties, that is, the linearity and repeatability are less than 1%, and the cross-talks are also less than 5%. As a result, each indicator has full reached the operating requirements in using of large diameter silicon wafer grinding force measuring.
Transient Signal Detection in Non-Gaussian Noise Using Stochastic Resonance and Wavelet Domain Power-Law Detector
Authors: Dong Hua Yu , Yang Zhi
Published: June 2014

The detection of weak transient signal buried in non-Gaussian noise is investigated. Non-Gaussian noise is modeled by Gaussian mixture distribution. 3-level quantizer is used as a nondynamic stochastic resonance method to enhance SNR of weak signal. NL-length samples of signal are arranged into a matrix. Every column of the matrix is calculated into M-level decomposition. Based on the squared value of the detail and approximation coefficients, a novel Power-Law detector in wavelet domain is established. Numerical experiments and comparison show that, on the same SNR and false alarm rate, proposed method could provide higher detection probability.
Calibration Methods of Proximate Analyzer
Authors: Wang Long , Xu Yang , Li Xian Hong
Published: June 2014

Proximate analyzer is broadly used for determination of coal, so it is very important to evaluate its performance, orderly, the proximate analyzer is needed to be calibrated by metrology organizations. But there is no standard or regulation for proximate analyzer calibration in our country. On the basis of the function characteristics of proximate analyzer, the authors have suggested the calibration methods of temperature control performance, indication error and repeatability of ash and volatile, and the general technical requirement which includes appearance, insulation resistance, and insulation strength. The experimental results prove that this method can evaluate the performance of the proximate analyzer accurately and comprehensively.
Research on Power and Brake Detection Integration of Wheeled Construction Machinery
Authors: Gong Cong Cong , Lu Ming , Ling Hai Feng , Li Bo
Published: June 2014

The power and brake performance of wheeled construction machinery are separately detected on different test equipment in present chassis detection line. A new method is put forward in the veiw of high cost, large area occupied and low treatment efficiency of the traditional line. A DC dynamometer is provided as the power absorbing device and the reverse drag device to combine the two separate platforms in the proposed method, and the mathematical model of DC dynamometer is built based on the principle of chassis performance test. The parameter of dynamometer is determined by calculating, and power and brake detection integration of the wheeled construction machinery is achieved on the integrated test platform.
Research on the Metrological Verification System for an Equipment
Authors: Huang Yun Lai , Bai Hang , Feng Ji Wei , Fan Hong Zhi , Ma Jiang Feng
Published: June 2014

Because of not considering the metrology problems at the time of production, it is necessary to developing the metrological verification system for an equipment. Firstly, the design requirements and principles of the metrological verification system are analyzed. Secondly,the implementation and principle of the hardware of the general equipment and special equipment verification device in the system are presented in detail. Thirdly,the system software development tools, the design ideas and operation interface are introduced. Finally, the metrological verification system has made an objective assessment.
Design and Calibration of a Cutting Force Dynamometer
Authors: Ren Zong Jin , Zhang Jun , Jia Zhen Yuan , Shang Yong Yan
Published: June 2014

In modern industry the processing quality and precision become the concerned aspects. The cutting force dynamometer could ensure the two points by adjusting the cutting parameters. A piezoelectric dynamometer is introduced. The electric potential of X0 and Y0 crystal wafer has been analyzed by ANSYS under Fz, Fx and Mz. For the Fx and Mz measurement, the charge distribution expression is calculated by nonlinear elasticity and piezoelectric theory. The dynamometer is designed and the calibration experiments have been had. The nonlinearity and repeatability of Mz, Fx, and Fz are 0.77% and 1.05%, 0.46% and 0.58%, 0.34% and 0.69.
Influence of Temperature and Pressure on Nozzle Array Fluidic Gyroscope
Authors: Chen Jing Bo , Piao Lin Hua , Zhao Jing Jing , Ding Xia
Published: June 2014

In this paper, the temperature and pressure distribution in sensitive element of nozzle array structure gyroscope is analyzed. Using ANSYS-FLOTRAN CFD software, the finite element simulation is conducted by a series of procedures, such as two-dimensional model building of fluidic gyroscope, mesh, load applying and equation solving. The temperature and pressure distributions of nozzle array structure fluidic gyroscopes are calculated. The results show that the thermal wires heat temperature of the surrounding gas which place at 1.5mm from the outlet, and which produce internal temperature gradient in sensitive cavity, temperature changes symmetry of the cavity center. The pressure near the outlet is higher than any other position in the cavity, and which is 0.21109Pa. In this paper, the structure optimization of nozzle array gyroscope which provides effective theoretical basis for improving its performance.
An On-Line Water Quality Monitoring System for the Reservoirs Based on Android
Authors: Dai Zi Wen , Liao Hai Yang
Published: June 2014

According to the demand of water quality automatic monitoring in many large or medium reservoirs, we proposed an on-line water quality monitoring system. It is composed of wireless sensor networks and an embedded monitoring platform. We built a novel early-warning model to well adapt to the regular pattern of water quality change in the reservoirs. As a result, an Android application with outstanding control experience is achieved for real-time monitoring, water pollution early warning and water quality comprehensive assessment. Experimental results show that the system can work stably for a long time and provide accurate monitoring information continuously. It can also detect the abnormal signals of water quality in time and alarm. The system efficiently satisfies the requirement of water quality on-line automatic monitoring.
Electromagnetic Shielding Technology Applications in the Electronics Shelter
Authors: He Ting , Tang Hong Xia , Lv Kang , Wan Jun Lin
Published: June 2014

First, briefly introduced the theory of electromagnetic shielding; second, analyzed electromagnetic shielding technology in practical and applied perspective, at the same time, pointed out the key points of electromagnetic shielding cabin design; at last, proposed improvement for the follow-up study.
Performance Analysis and Simulation of BCH Code in Communication
Authors: Shang Qi Xing , Zhang Cong
Published: June 2014

This paper mainly introduces the basic principles of BCH code, which is a type of error control codes. The error control system is an important method to improve the communication transmission system. Communication system that containing BPSK modulation is built by MATLAB and through simulating and analyzing the performance of BCH communication systems, it was discovered that the BCH code transmission characteristic has significant gain. This paper provides the theory basis for the projects that contain BCH code.
Research on S-Band DDS-Driven PLL Low Spurious Frequence Synthesizer
Authors: Zhao Yue , Liu Yun Qing
Published: June 2014

In the development process of modern radio communication device, it is important of merits that the frequency of the generator performance, which can directly affect the performance of the communication device. In usual, often used to motivate phase-locked loop (PLL) to realize the broadband frequency synthesizer of low noise and direct digital synthesizer (DDS) of small step. This paper expounded a kind of technology that realized S-band DDS-driven PLL low spurious frequence synthesizer.Designed to get which the bandwidth of 250MHz and spurious suppression indicators meet the whole band is better than -65dBc.
Fast Demodulation Algorithm for Rate Compatible Modulation by Log-Map Principle
Authors: Zou Qin , Wang Min
Published: June 2014

Rate compatible modulation (RCM) is a promising technology to smooth rate adaption of physical layer in wireless network, and do not request the accurate channel estimation. Since RCM demodulation adopt probability convolution operator in belief propagation algorithm, it greatly bring big computing complexity. This paper proposes fast demodulation algorithm for RCM by using log-map principle. First, we propose a new demodulation algorithm by a novel approach to convert arithmetic domain to logarithm domain. Then, we design a parallel manner that to find multivariable computation in Log-MAP algorithm for hard implementation. Finally, we evaluate fast demodulation algorithm by two evaluation metrics BER and goodput, respectively. Our analysis show that the demodulation complexity can be reduced about 90%. While experimental results show that the fast demodulation algorithm performance only has a marginal loss.
Simulation Research on MAC Layer Protocol Base on OPNET Modeler
Authors: Mao Yong Ming , Zhang Dong Wei , Kan Feng Long
Published: June 2014

Modeling and simulation of MAC layer protocols for wireless sensor networks was realized, including WOO-MAC, IEEE802.11 and S-MAC base on OPNET Modeler. On three aspects performance of the average end-to-end information delay, the end-to-end throughput and the average energy consumption, the simulation results were analyzed and research. And the results base on WOO-MAC protocol showed better performance than IEEE802.11 and S-MAC.
ZigBee Network Routing Algorithm Based on the Research
Authors: Chen Nan , Wang Chang Tao , Kan Feng Long , Zhao Lan Guang
Published: June 2014

ZigBee is the new standard that has been developed for low cost, low data rate and low power consumption wireless network,The routing algorithm is the key of the research and development work. This paper introduces the ZigBee protocol model of specification, And focuses on the ZigBee protocol network layer routing algorithm, Analyzes the advantages and disadvantages of tree routing and AODVjr routing algorithm.
The Development and Applications of SAW RFID Technology
Authors: Chen Fei , Mao Jian
Published: June 2014

SAW (Surface acoustic wave) is an elastic wave, which spreads in the presence of solid half-space and the energy concentrates on the vicinity of the solid surface. SAW-RFID technology is purely passive and low cost, long reading distance and resistant to harsh environments. It has a wide use in the intelligent transportation, logistics management, access control systems, district personnel and vehicle management and other fields. This paper focuses on the principles of the SAW-RFID system, introduces some multi-recognition ways of the SAW-RFID system in detail and discusses the applications of SAW-RFID technology.
Cluster-Based Multipath Routing Algorithm of Ant Colony System for Wireless Sensor Networks
Authors: Zhang Jun Ye , Chen Dong Ya
Published: June 2014

Due to the special demand of energy control and balancing the energy of nodes in wireless sensor networks，multipath routing based on ant colony system(MACS)was proposed. The algorithm utilizes the self-organization，self-adaptability and dynamic optimization capabilities of the ant colony to find the optimal routing and suboptimal routing from sources to Sink．Simulation results show the algorithm balances energy consumption of nodes and extends network lifetime effectively．
A Class of Nonlinear Difference Inequality with Weakly Singularity in Engineering
Authors: Hou Zong Yi , Wang Wu Sheng
Published: June 2014

In this paper, we discuss a class of new nonlinear weakly singular difference inequality, which is solved by change of variable, the mean-value theorem for integrals and amplification method, Gamma function, and explicit bounds for the unknown functions is given clearly.
Application of the Improved Mapping Approach to Exact Solutions and Chaotic Patterns for a Nonlinear Equation
Authors: Lei Yan , Ma Song Hua , Fang Jian Ping
Published: June 2014

Starting from an improved mapping approach and a linear variable separation approach, a series of exact solutions of the (2+1)-dimensional Boiti-Leon-Manna-Pempinelli system (BLMP) is derived. Based on the derived variable separated solution, we obtain some special localized excitations such as dromion, solitoff and chaotic patterns.
Two Differential-Integral Inequalities in Engineering
Authors: Wang Wu Sheng , Huang Chun Miao
Published: June 2014

In this paper, we establish two new differential-integral inequalities. Under several practical assumptions, the inequality is solved by adopting novel analysis techniques, such as: change of variable, amplification method, differential and integration, and the dialectical relationship between constants and variables, and explicit bounds for the unknown functions are given clearly. The derived results can be applied in the study of some practical problems in engineering.
An Advanced AOI-Cast Algorithm Based on PCA
Authors: Wang Yan
Published: June 2014

Voronoi-based Overlay Network (VON) has been proposed that promises to maintain high overlay topology consistency in a bandwidth-efficient manner. VoroCast constructs a spanning tree across all AOI neighbors based on Voronoi diagrams, while FiboCast dynamically adjusts the messaging range by a Fibonacci sequence. VoroCast improves the AOI scalability of P2P-based NVEs. However, one potential drawback of the schemes is that the child node degrees are only based on peers' positions, but not node capacities. Since each node in VoroCast has different capacity, packet loss will be unavoidable. VoroCast may lead to lower multicast efficiency in AOI. To these problems, an Advanced AOI-cast algorithm based on PCA is presented. In the algorithm, node capacity is related to node CPU (c), node bandwidth (b) and node memory (m), and the node capacity is calculated according to the PCA. An undirected graph is formed through all the nodes in the AOI and the edge weights are calculated by the Gaussian function. Through the prim algorithm, to generate the minimum spanning tree of the weighted undirected graph, and the minimum spanning tree is used as the final multicast tree. The message is delivered through the multicast tree. The simulation results show that the algorithm gains a greater improvement on multicast efficiency, and achieves better scalability.
Observer-Based Control of a Class of Switched Fuzzy Systems
Authors: Yang Hong , Lü Huan Huan , Zhang Le
Published: June 2014

For the non-measurable states, a control of switched fuzzy systems is presented based on observer. Using switching technique and multiple Lyapunov function method, the fuzzy observer is built to ensure that for all allowable external disturbance the relevant closed-loop system is asymptotically stable. Moreover, switching strategy achieving system global asymptotic stability of the switched fuzzy system is given. In this model, a switching state feedback controller is presented. A simulation shows the feasibility and the effectiveness of the method.
Switching Control for a Class of Switched Fuzzy Systems
Authors: Yang Hong , Lü Huan Huan , Zhang Le
Published: June 2014

A switching control of uncertain switched fuzzy systems is presented. In this model, each subsystem of switched system is an uncertain fuzzy system. Using Multiple Lyapunov function method and switching technique, the relevant closed-loop system is asymptotically stable for all allowable uncertainties. Moreover, switching strategy achieving system global asymptotic stability of the uncertain switched fuzzy system is given. The main condition is given in form of LMI which are more solvable. A simulation shows the feasibility and the effectiveness of the method.
The Design of Automated Parking Brake Performance Test Equipment
Authors: Yan Jin , Lin Feng , Ye Zhen Zhou , Shao Jian Wen
Published: June 2014

In order to test the parking brake performance of in-use vehicle, in this research, we designed a set of automated test system which could calculate the parking brake performance. The automated test system which was composed of four parts: vehicles weighing device, automatic traction gear, force cell, and intelligent control unit would calculate the braking force based on the traction force and the total mass of the vehicle. The results indicate that this test equipment is found to be convenient application, small floor coverage and reliable.
Converter Control Strategy Analysis on EESG
Authors: Lin Zi Xu , Xu Hong Hua
Published: June 2014

With respect to the permanent magnet synchronous generator, electrical excitation synchronous generator (EESG) can control excitation and its price does not fluctuate with the rare earth materials market, so it has been applied widely. This paper introduces the converter which controls power on excitation instead of the traditional vector control technology. This system has a simple hardware structure, high system efficiency. The simulation results demonstrate the correctness of the proposed converter control strategy.
Siemens PLC Software Redundancy in the Design and Implementation of Biomass Pellet Fuel Gasification Test of Strength
Authors: Li Xing Lan , Liu Jin , Xie Yue , Yun Tan You
Published: June 2014

Scientific and technological research for improving raw material gas quality test conducted using redundant control technology, build a platform-based control system hardware and software redundancy Siemens S7-300PLC soft environment, including system design, working principle, hardware and software design. Realization of loading and unloading, gasification combustion, feeding, excessive combustible gas containing oxygen treatment, processing and gas shutdown emptying, composition and temperature computing gasification process control, equipment control, remote centralized monitoring, data processing and management data communications and surveillance and other important parts of pellet fuel from biomass gasification to purify the whole process automation and control, equipment design and process design for a living material gas industrialization process system provides a strong basis.
The Study on an Automatic Safety Warning System of Mistakenly Entering Charged Interval
Authors: Chen Lei
Published: June 2014

In order to avoid the substation staffs mistakenly entering charged interval and resulting in personal safety accidents, combined with the actual situation of substation maintenance work, we designed an automatic warning system. Each component was given the functions and basic principles .The system used a variety of sensors to detect people approaching charged region to improve the reliability of warning. And it can communicate with the maintenance management computers via RS485.
Research on the Path Optimization Algorithm of Drilling Rig Discharging Pipe System
Authors: Jiang Zheng Qing , Wang Bin Bin , Dong Huai Rong , An Qing Bao
Published: June 2014

Sea or land rig requires a lot of roots in the drilling process. The catwalk-machine generally transports drill pipe to the second floor units. The rooted is established by dynamic rat holes, stored in boxes and taken from the rooted box during the drilling process. Automatic control systems for the rig on the stand of emissions complete automatic access of rooted. Previous control systems adopt the method of fixed access in order to complete the order for reducing control, although such control program is simple but the production efficiency is not high. In this paper, to access the walking path [1] in the process of the minimum as the optimization goal, not to block the internal root deposit box for qualification, designed a control algorithm to optimize the access path, which greatly improves access efficiency, reducing the distance of sports equipment, with high practical value.
The Study of Simulation on Variable-Frequency Air Conditioning Systems Adopted by Control Strategy of Hybrid Automata
Authors: Liu Ze Qin , Wu Zhen Jing
Published: June 2014

This paper setup the hybrid automata control model of variable-frequency air conditioning by adopting Stateflow simulation toolbox of Matlab. The regulated quickness of the hybrid automata control model was simulated and validated by comparing PID control in Simulink. The hybrid automata control strategy was proposed in this paper for exploring hybrid features of the frequency conversion air conditioning control system. Comparing the traditional PID model, the result indicated the convergence speed of hybrid automata control strategy was faster to control the compressor operating frequency, better to simulate indoor energy balance, and to control the operation frequency state of the compressor. The paper showed the control strategy of hybrid automata control could achieve temperature control better, and the studied model has the better effects.
Facilities Vegetables Monitoring and Control System Design Based on WCF and Internet of Things
Authors: Yan Li , Wang Guo Wei , Wu Shui Fang
Published: June 2014

The production of facilities vegetable affected significantly by environmental factors, therefore it require real-time monitoring information of light, air temperature and humidity, soil temperature and humidity, and timely early warning and controlling, to prevent irreparable damage. This study achieved real-time monitoring and timely warning of environmental factors, and optimal control of pumps and roller blinds in the Facility vegetable. We have adopted Internet of Things technology and WCF communication interface, the system through C # language and the SQL Server database to prepare. The application in Jilin Province Jinta Industrial (Group) Co.Ltd. has showed that the system is better, achieved the purpose of high yield income.
The Multi-Attributes Assessment Method of Control Performance Based on Data Driven
Authors: Qi Liang Cai , Kong Hai Zhi , Qiu Jian Wen , Liu Yu Qiu , Du Xiao Guang
Published: June 2014

The performance of a controller is usually characterized by several attribute indexes. In this context, this paper applies multi-attribute decision-making techniques to the assessment of control performance, which takes into account both stochastic and deterministic performance indexes. Case studies demonstrate the validity of the proposed method.
Design of Household Multi-Function Vacuum Cleaner
Authors: Jin Hong Yan , Zhu Zhi Wei
Published: June 2014

After a long development and optimization, existing vacuum cleaners' technology has been mature. This design take multi-function vacuum cleaner as the main research object, take the family as for the target user group, research and analyse the market, adopt the method of bionic design, put forward design demand characteristics of the vacuum cleaner: simple and novel shape, convenient operation, interesting etc. Then design a more professional household multi-function vacuum cleaner to meet the needs and pursuit of people's life .
Optimization of the Dynamic Performance of the Direct Drive Volume Control System Based on Orthogonal Experiment
Authors: Huang Ai Qin , Wang Yong
Published: June 2014

Direct drive volume control (DDVC) electro-hydraulic servo system has many advantages compared to the valve control system. However, its application scopes were restricted by its poor dynamic performance. To study the reason for the low dynamic response, mechanical model of DDVC electro-hydraulic servo system is established. Structure parameters influencing the dynamic performance are analyzed. To optimize the structure parameters, the methodology of orthogonal experiment is presented. The selection of factors and levels of the experiment and the choice of the evaluation index are also revealed. The proposed methodology is carried out by simulation software and an optimal configuration is obtained. The dynamic response of the DDVC system with the optimal parameters is simulated. The results show that the dynamic performances are improved. The cross-over frequencyincreases from 0.0046 rad/s to 0.0442 rad/s, and the rise time Tr decreases from 488.6s to 47.90s.
Student Attendance Check System Based on Fingerprint Identification Technology
Authors: Lv Chao , Liu Zheng Dong , Zhang Hai Bo , Xiu Yi
Published: June 2014

The current card attendance check system in colleges has the problems of low efficiency and accuracy, and severe condition of taking attendance for others. To solve these problems, we have designed attendance check system for college students based on fingerprint identification technology. This system can share information with educational administration system, offering such functions as academic year and semester management, classroom management, lesson management, and schedule management, and attendance check authority management, etc. This system utilizes the characteristics of fingerprints, which carries uniqueness and stability and adopts the increasingly mature fingerprint identification technology. It can improve the quality and efficiency of attendance management for college students, and promote the information construction on campus.