bluuebunny/crossref_metadata_2025 huggingface dataset:
Orientation Workspace Analysis of a Novel 3SPS+1PS Symmetrical Parallel Manipulator Based on Unit Quaternion
Authors: Yu Jing Li , Cheng Gang , Zhang Shuai , Zhang De Kun
Published: February 2011

For a novel 3SPS+1PS parallel manipulator with 4 degrees of freedom including three rotations and one translation, the formulae for solving the inverse kinematics equations are derived based on quaternion method. Unit quaternion is used to represent the position and orientation of moving platform, and the singularities caused by Euler angles are avoided. Combining the topological structure characteristics of the parallel manipulator, it only has three rotations when its moving platform is at a given translation position. Based on the inverse position/pose equations and the all the constraints of the parallel manipulator, the discrete algorithm for the orientation workspaces of 3SPS+1PS parallel manipulator where the moving platform is at some different given translation positions are designed. The research builds the theoretical basis for optimizing the orientation workspace with given position.
Trajectory Planning of Robotic Orthodontic Wires Bending Based on Finite Point Extension Method
Authors: Zhang Yong De , Jiang Ji Xiong
Published: February 2011

To meet the requirements of forming complex and hard-to-bend orthodontic wires’, this paper proposes to use MOTOMAN UP6 for the bending operation and develops the finite point extension method for robotic trajectory planning. The inputs of this method are the key points including the midpoints, endpoints and the position of the offset of an orthodontic wire. The dichotomy is adopted to search the ratio of chord length to arc length and the area surrounded by the chord and arc of adjacent key points. The number and positions of the controlled points are determined accordingly based on the required accuracy. The MATLAB is applied to calculate the angle of bending at each control point from the perspective of rebound elasticity. After the control points’ message was obtained, the experiment is developed and shown that the finite point’s extension method can be used to plan the trajectory of robotic bending operation with an improved accuracy and efficiency in comparison with current manual practice.
Research and Design of Range Positioning System Based on Ultrasonic Sensor for Intelligent Mobile Robot
Authors: Han Jun , Chang Rui Li
Published: February 2011

The technology of mobile robot is an important branch in robot research. In order to endow robot with capacity of intelligent control and autonomous navigation, and solve the problems such as high cost and large power consumption, a range positioning system based on ultrasonic sensor for intelligent mobile robot is designed in this paper. The system makes robot achieve some functions such as alarming, obstacle avoidance and the positioning.
Design of the System in Asynchronous Multiplexing at Low Rate
Authors: Zhang Yun Zuo , Zhang Xiu Qing
Published: February 2011

To meet the needs of a variety of applications, and solve the problem that some existing transmission equipment and terminal equipment can not be interconnected, a new fast method for clock recovery in digital communication is presented. Based on the basic theory of digital multiplexing technology, using FPGA large-scale integration technology, the design of the new system in asynchronous multiplexing at low rate is realized. In this system, 1 to 8 branchs low-speed data can be adaptive data multiplexing , and multi-frame structure can be set discretionarily. The design process and the realizing process to be adaptive are elaborated in this paper. Finally, test indicators are given, which meet the expected designing requirements.
A Microcontroller Based Controller Circuit for the Motion Control of an Articulated Robot with Three Degrees of Freedom
Authors: Ovy Enaiyat Ghani , Rokonuzzaman Mohammad , Ferdous Shah Muhammad , Chowdhury Nurul Absar
Published: February 2011

Due to the quick evolution of manufacturing processes, the demand for more flexible automation systems is on the rise. To answer these requirements, distributed motion control architecture based on intelligent drives tends more and more to replace the traditional solutions. This paper presents the control of an articulated arm robot with three degrees of freedom. The essential part of the robotic arm is a programmable microcontroller based system capable of driving basically three stepper motors design to form an anthropomorphic structure. This paper explains the method of interfacing the robotic arm stepper motors with the programmed Atmega16 microcontroller which is used to control the robot operations. C programming language is employed here in programming the microcontroller.
Smooth Track-Keeping and Real Time Obstacle Detection Algorithm and its PID Controller Implementation for an Automated Wheeled Line Following Robot
Authors: Rokonuzzaman Mohammad , Ferdous Shah Muhammad , Ovy Enaiyat Ghani , Hoque Md. Ashraful
Published: February 2011

Line following automated robots is extensively used in industries for smooth running of production. This paper presents a simple and effective solution for path tracking problem for a wheeled automated mobile robot which can be used for material handling in industries. A PID controller has been used for controlling the robot which is capable of moving safely by smooth track-keeping in partially structured environment without any collision with static or moving objects. The purpose of the project is to build a mobile robot which will provide fast, smooth, accurate and safe movement in any given line or track. A straight or wavy line would be simple to follow whereas aT-junction, 90 degree bends, acute angle bends and grid junctions would be difficult to navigate through. This is due to the physical kinematics constraints which are limited to motor response, position and turning radius of the robot. A line sensor configuration has been proposed to improve the navigation reliability of the mobile robot which uses differential drive system. A dynamic algorithm has been developed for detecting and following a specified line which ensures the reliable and safe movement of the robot.
The Remote Monitoring System for Fault Diagnosis Using ActiveX Control Technique
Authors: Shi Hai Ling , Song Yi Mei , Xiang Jia Wei , Yue Wei Wei , Liao Cai
Published: February 2011

The remote monitoring system for fault diagnosis based on B/S model is established using ActiveX control and virtual instrument (VI) techniques. The system consists of clients, network communications and remote fault diagnosis center. Remote panel technology based on B/S model using LabVIEW is constructed to realize the real-time display the results of remote monitoring. The remote fault diagnosis is achieved based on expert system. The temperate monitoring example shows the effective of this system.
Design of Measure Control System for Thermal Defects Based on ZigBee
Authors: Xiong Jun Hua , Xu Shi Qing , Yun Chao
Published: February 2011

To measure and control thermal defects of power station, continuous power is provided to the ZigBee wireless temperature sensors by using monocrystalline silicon solar cells and thermoelectric generation modules, which can collect and process the real-time temperatures of high voltage equipments in the station. Simultaneity, the system can solve the problem that overheat faults can not alarm timely when efficiency of solar cell decreases during the continuous rainy days. The remote real-time controlling is realized by using client and server programs of VC + +.NET. The lossless compression and real-time image transmission are implemented through employing the screen grid-division method and the Huffman compression algorithm. All of these provide a technical assurance to the remote controlling of heat vice of high-voltage equipments in multi-stations.
Research on Simulation and Experiment for Piezoelectric Smart Structures
Authors: Yang Rui , Liu Xiao Shun , Ren Hao Yi
Published: February 2011

Interdigitated electrodes piezo-actuator has been widely applied in smart structures. Based on the analogy between the equation of inverse piezoelectric effect and piezoelectric strain decomposition, the driving voltage is simulated for mechanical load in this paper. Firstly, stress simulation method of piezoelectric actuators can be employed to the static displacement of piezoelectric cantilever beam and wing-box structure. Then, a modified coefficient is needed to modify the ferroelectric properties of the high voltage of the interdigitated electrodes piezoelectric composite materials. Finally, the experimental results indicate that stress simulation method of piezoelectric actuators is valid, and it can accurately simulate deformation of piezoelectric smart structures. The Error is little, which meets simulation requirements.
The Appraisal of Velcro’s Surface Quality Based on Machine Vision Systems
Authors: Zhao Da Xing , Lin Qing
Published: February 2011

The most important problem of the Velcro Manufacturer face is to control the surface quality, and how to improve the product quality has become the key of the enterprise. Therefore, this paper take the research on the examination method of the Velcro’s surface flaw, and propose a simply and effectively detection method on the marginal check and the flaw extraction of the buckle in the considering of the system’s real-team and the effectiveness. The experiments have been carried on the results been analyzed under the Visual c + + develop environment. Experimental results show that the system can detect the common defect of the fastening surface accurately and classify them.
A Layer-Driven Trouble Hunting in Satellite-Networks of Cyberspace
Authors: Yin Jie , Li Qian Mu , Hou Jun
Published: February 2011

With the development of the Satellite-Networks, information globalization becomes the tendency of human development. But the Satellite-Networks have some characteristics, such as the diversity of coupling form, the asymmetry of terminal distributing and Satellite-Networks’ opening and so on. Leading the Satellite-Networks faced with faults emerged one after another, so orientating the fault node in time is very important to guarantee the integrality and usability of Satellite-Networks system. According to the layer-driven principles, a new type of trouble hunting system is presented. In it, event detection sequences are viewed as positive selection event database, and a trouble hunting matrix will be built up and analyzed. The experiment shows good trouble location ability.
Molding CAE Technology and its Application Research
Authors: Wang Yan Feng
Published: February 2011

In this paper, the study of numerical simulation method used in jet molding CAE major technology is carried out, including simulation of filling flow process, keeping the stress process, cooling process, warping deformation and molecular orientation and so on; also makes a system induced study on injection molding CAE successfully applied in the injection mold design.
Construction and Realization of Networked Virtual Test System Based on LabVIEW
Authors: Cai Gong Xuan
Published: February 2011

This paper analyses the construction mode and the structure composition of hardware and software of networked virtual test system; explores solutions and realization technology for LabVIEW-based networked virtual test; carries out researches on remote control technology of networked virtual instrument; develops the networked virtual data acquisition and processing system based on LabVIEW; realizes the acquisition, transmission and processing of remote data as well as the remote control of the running state of virtual instrument.
Investigation of the Unsteady Flow for the Supersonic Jet Element
Authors: Xu Yong , Zhang Guo Qing , Wang Fei
Published: February 2011

The unsteady viscous flow of the supersonic jet element (SJE) was simulated numerically based on CFD technology. A dual time-stepping scheme and AMG scheme were employed to solve the unsteady flows in SJE, and the reasons of thrust fluctuation during the wall-attachment state of SJE are found out. Based on the pressure cloud and streamlines, the vortices generated by the unsteady flow on attached wall had also been investigated and drawn some conclusions.
Two-Point Floating Clamping Device Based on Fixed Cylinder with Double-Piston and Toggle-Lever Force Amplifier
Authors: Si Guang Ju , Zhong Kang Min , Jia Jun Peng
Published: February 2011

Two-point floating clamping device, widely used in manufacturing field, can effectively ensure the same clamping force on different workpieces or different surfaces in one workpiece. But due to the application of unitary suspended articulated cylinder, traditional two-point floating devices have disadvantages such as poor working status, great impaction, vibration and noise. A kind of innovatively designed two-point floating clamping devices, with rigidly fixed cylinder replacing unitary suspended articulated cylinder, is presented in this paper. To solve the problem of insufficient degrees of freedom, three different methods are applied. This device has significant advantages in compact structure, small impaction and vibration noise. Moreover, the working principle and mechanical calculation formulas are presented in this paper, which is instructive to the industrial field.
The NC Mechanism of Reciprocating Rectilinear Movement at High Frequency Based on Two Symmetrical Cranks
Authors: Wang Ming Di , Zhong Kang Min , Chen Zheng
Published: February 2011

The reciprocating rectilinear moving mechanism is applied widely in the industry, which is now usually driven by the non-symmetrical mechanism. Due to the changing radial force generated by the slider, the big friction loss and the vibration noise are caused. And, the size of travel in reciprocating motion is fixed and can not be adjusted. In order to overcome these defections, the reciprocating rectilinear moving mechanism at high frequency driven by the stepper or servo motors based on two symmetrical cranks is innovated in this paper, in which the linear movement is converted by the two cranks. The radial forces in this innovated mechanism are quite symmetrical and balanced, so the friction loss can be almost ignored and the oscillation noise is very small too. Then, through programming, the angle range of stepper or servo motors can be controlled to output any required displacement and any required force. Thus, the scope of application of this mechanism is expanded extremely.
3D Laser Inner Engraving Path Generation and Simulation for Crystal Glass
Authors: Zhu Hu , Li Nan , Liu Zhi Jun
Published: February 2011

The method of laser inner engraving path generation and simulation for crystal glass is presented based on STL(Stereo Lithography) model. To generate the laser exposure points that are adaptive to the surface of model, the contour lines are obtained by cutting the STL model with unequal distance using a series of plans that are perpendicular to Z-axis. Then the contour lines are offset and scattered, and then the path is generated by sorting and connecting each discrete point in order. Simultaneously, simulation method of laser inner engraving for crystal glass is also proposed. The case studies show that the method can primely realize the engraving path generation and the simulation for the laser inner engraving of crystal glass, and that the system runs stably and reliably.
Symmetric Beauty: Double-Position Numerical Control Press Based on Lever-Toggle Force Amplifying Mechanism Driven by Linear Servo Motor
Authors: Wu Fan , Wang Ming Di , Zhong Kang Min
Published: February 2011

According to the conception of symmetric beauty in the aesthetics, a new kind of numerical control press with double operating positions based on lever-toggle force amplifying mechanism driven by linear servo motor is introduced here. Its working principle, characteristic features and mechanical calculating formulas are given also. Compared with traditional mechanical press based on the crank-linkage-slider mechanism driven by common AC motor, the system has following advantages: two operating positions, higher energy transmission and production efficiency, no environmental pollution; lower cost of machine tool. Through rationally designing the acceleration curve of the pressure head, the impacting noise of the system can be reduced greatly. This press is especially suitable for blanking and low-stretching process.
Control System of Bellows Welding Equipment Based on Motion Controller
Authors: Ren Zhong Wei , Duan Zhen Yun , Zhao Wen Hui , Zhang Yi
Published: February 2011

In order to improve the integration and automation level of control system of bellows automatic welding equipment, an open control system of bellows welding equipment is proposed which is based on "PC+motion controller" according to the characteristics of welding bellows and current technology of welding control. IPC D610 and the motion card NextmoveES is effectively connectted by RS232 + RS232 / RS485 communication interface. And the integrated top software of control system is developped by using VB based on API function which is provided by controller, parameters setting and real time monitoring tasks module are completely integrated on one system. The syetem is reliable and effectively, the automation level of the bellows welding is greatly improved.
A New Time Series Regression Method Based on Support Vector Machine Plus and Genetic Algorithm
Authors: Sun Wei , Meng Guo Xiang , Ye Qian , Zhang Jian Zheng , Zhang Li Weng
Published: February 2011

Support vector machine (SVM) is gaining popularity on time series analysis due to its advanced theory foundation. The introduction of the hidden information on the basis of SVM is called support vector machine plus (SVM+). However, the hidden information which provides something closely associated with the time series increases the difficulty of training SVM model. In this paper, a new time series regression method GA-RSVM+ is put forward, in which Genetic Algorithm (GA) is used to search the optimal combination of free parameters. The experimental result shows that GA-RSVM+ can accurately determine the parameters on its own and achieve best regression precision. This method has a clear advantage in the regression analysis of time series.
A Fault Detecting System of Intelligent Detection and Diagnosis
Authors: Shao Ren Ping , Li Yong Long , Hu Wen Tao
Published: February 2011

By testing the running gear system with fault, the vibration signals of gear system are acquired at different speeds. Using wavelet de-noising by threshold to extract the useful feature signals, combining time-frequency analysis with intelligence detection theory of wavelet analysis, the feature signals are decomposed into different frequency bands. Then, according to the energy feature theory, the magnitude of energy in each frequency band is calculated to identify different faults in different running conditions successfully. Based on above all, it called the MATLAB Script Node in LabVIEW to process and diagnose the acquired feature signals with fault. And, a gear fault detection system, Virtual Instrument Diagnostic System, is developed by combining both advantages of LabVIEW and MATLAB, using hybrid programming method about both of them. The system possesses various functions like as: collection, analysis, feature extracting, fault detecting, diagnosis and so on. The results show that the diagnosis system runs well and can be used in the detection and diagnosis of actual operation system.
Electrical Control System Designing Based on Logic Relation Chart
Authors: Cheng Guang Zhen , Cheng Yuan Bo
Published: February 2011

Based on working flow and control demand for figuration machine of the grinding material, a work process sketch map is drawn. According to the logic design method and step of electrical control circuitry, a logic relation chart can be finished. Considering basic logic adaptable condition of relay expression, operation component work zone must be arranged reasonably and operation component logic expression must be expressed clearly and then the operation component logic expression can be ultimately converted into equivalent electrical control circuit diagram so as to realize control requirements.
Research on the Control and Key Technology for Parallel Operation System of Mobile Generator
Authors: Mao Long Bo , Wang Wei Jun , Yang Jing
Published: February 2011

This paper research the conditions and the methods of generator parallel operation, analyzed the difficult in parallel operating technology of mobile generator, offered a parallel operating system control method based on frequency control，voltage regulation，synchronization tracking control and active power allocation control of mobile generator. According to the national military standard, tested on the parallel operation between the same power mobile generators and different power mobile generators, the result of the test proved the validity of the control scheme brought out by this paper.
A Novel Symbolic OBDD Algorithm for Generating Mechanical Assembly Sequences Using Decomposition Approach
Authors: Xu Zhou Bo , Gu Tian Long , Chang Liang , Li Feng Ying
Published: February 2011

The compact storage and efficient evaluation of feasible assembly sequences is one crucial concern for assembly sequence planning. The implicitly symbolic ordered binary decision diagram (OBDD) representation and manipulation technique has been a promising way. In this paper, Sharafat’s recursive contraction algorithm and cut-set decomposition method are symbolically implemented, and a novel symbolic algorithm for generating mechanical assembly sequences is presented using OBDD formulations of liaison graph and translation function. The algorithm has the following main procedures: choosing any one of vertices in the liaison graph G as seed vertex and scanning all connected subgraphs containing seed vertex by breadth first search; transforming the problem of enumerating all cut-sets in liaison graph into the problem of generating all the partitions: two subsets V1and V2of a set of vertices V where both the induced graph of vertices V1and V2are connected; checking the geometrical feasibility for each cut-set. Some applicable experiments show that the novel algorithm can generate feasible assembly sequences correctly and completely.
Design of the Control Circuit Based on FPGA for the Underwater Trash Detection System
Authors: Zhao Guo Ku , Zhang Qi
Published: February 2011

For the detection of underwater trashes, the ultrasonic detection system is a necessary deceive. In the traditional ultrasonic detection system, echo signal is generally processed by analog circuit, and only the distance information is obtained. In order to determine the distance and material of target, the amplitude of echo wave also need to be extracted, and FPGA is employed to control high-speed AD and process data. The design of control circuit based on FPGA is presented here. The control circuit includes modules of clock, high-speed data processing, communication and transmitting control. On the basis of the system design, simulation, implementation, the system experiments are completed. The results show: the functions of the control circuit based on FPGA are implemented correctly, but the system power consumption needs to be reduced more.
Based on Balance Scorecard to Make Teacher Performance Appraisal in College
Authors: Zhao Li Li , Wu Zhuo Ping
Published: February 2011

Teacher performance appraisal in college is important to stimulate teachers’ motivation and promote college development. Teacher is a special group in society, based on the several appraisal principles, to make reasonable performance appraisal system of them. It can strengthen staff construction in college and make significance to its development. This paper brings Balanced Scorecard to evaluate teachers’ performance, and follows equality principle to make comprehensive teacher performance appraisal in college.
Building Energy Consumption Prediction of Housing Industry in China Based on Hybrid Models
Authors: Xie Ying
Published: February 2011

Building energy consumption is a vital part of the total energy consumption in China, it is meaningful to predict the building energy consumption exactly as it is useful in the effective implementation of energy policies and is propitious for further expansion of the housing industry. In this paper, based on the factor analysis theory to reduce the dimension of the building energy consumption index, hybrid models of BP neural network and Least Squares Support Vector Machines are constructed respectively to predict the building energy consumption. Relevant data is collected from National Bureau of Statistics of China (1981~2009). Data analysis shows the proposed models, especially based on LS-SVMs, have more steady performance and higher accuracy.
The Digital Ink-Jet Printing Properties of Cashmere Treated by Low-Temperature Plasma
Authors: Tian Jun Ying , Pang Rui Dong
Published: February 2011

Microwave low temperature plasma（LTP）which is a physical processing method is used to modify the physical and chemical properties of cashmere fiber, thus improve digital printability. The paper mainly studies the effects of low temperature plasmas modification on the scale structure, the change of chemical component, hydrophilicity, printing properties of cashmere. The results show that low temperature plasmas treatment can make cashmere fiber scale edge blunted but keep in the integrity of scale structure. Hydrophilicity of cashmere fiber is improved as lipid substances exposed to the surface of fiber are damaged and yielding hydrophilic groups. In digital printing process, the k/s values of cashmere pretreated by low temperature plasma are higher than untreated ones because of the micro-etching of low temperature plasmas and yielding hydrophilic groups on cashmere surface. Cashmere fiber modified by low temperature plasmas can be steamed at 90°C for 0.5h. The application research of low temperature plasmas to cashmere fiber modification can improve the quality of cashmere products and reduce water and energy consumption.
Research on the Ink Penetration Depth into Offset Paper
Authors: Yang Yong Gang , Gao Qiao Zhuo
Published: February 2011

In order to predict and control the ink penetration depth, The base properties of 5 offset paper were firstly measured, namely, tightness、smoothness and K&N ink absorbency, etc. Then the penetration depth when offset magenta ink of the same volume entered into these papers was tested after printing. It was analyzed on the influences of offset paper and print processes on ink penetration depth. Finally, the relationships between the ink penetration depth under pressure and that under no pressure were studied. The results showed that both the tightness and smoothness of offset papers had impact on ink penetration into the paper internal structure, and the total ink penetration depth was about 1/5~1/3 of the thickness of the offset papers. In addition, the ink penetration depth under pressure was obviously lager than that under no pressure.
Optical Fiber Temperature Sensor Based on Fluorescence Mechanism
Authors: Wang Shu Tao , Cui Yan Yan , Huang Liang
Published: February 2011

Fluorescence optical-fiber temperature sensor based on Planck’s law is studied in this paper. Sapphire fiber is adopted as thermal probe. With steady physical chemistry performance, higher melting point, low loss in the waveband of 0.3~0.4 μm , sapphire fiber is very attractive for temperature optical fiber sensing and near infrared energy delivery. Making use of the method of FFT transformation to carry on measurement of fluorescence life time, the measured fluorescence life time can be obtained by tangent value of first non-zero phase angle. This method has virtues such as fast speed, small error and no background interference. Among the detection range from 0 to 450 , the thermometer has an average temperature resolution of 0.4°C .The experimental results show that the temperature measuring system can effectively decrease the influence of instability of light source and intensity variation in measuring channel on measurement results. This system also has advantages of high accuracy, very high temperature resolution, good dynamic response and immunity to the electro-magnetic interference.
Digital Simulation of Bridge Wind Fields Based on Wavelet Method
Authors: Jiang Tian Hua , Peng Jing Rong
Published: February 2011

Digital simulation of stochastic wind velocity field is prerequisite to flutter or buffeting analysis of long-span bridges in time-domain. Wavelet method was applied to the simulation of the stochastic wind field, performing the effective simulation of spatial stochastic wind field. According to the idea of multi-resolution analysis and orthonormal wavelets, relationship between wavelet coefficients and PSD(power spectral density)function is deduced , then the wavelet coefficients on each and every scale are obtained from the given PSD function, the intermittency was introduced into wavelet coefficients while at the same time preserves the target spectral characters. As a result, the inverse wavelet transform is applied to generate stationary wind velocity history through the given wavelet coefficients. A numerical example to illustrate the application of the proposed method for the simulation of a bridge wind velocity ﬁeld is provided.
Some Improvements of Genetic Programming in Data Fitting
Authors: Jie Hu , Feng Jia Quan , Chen Da Lin
Published: February 2011

This paper proposed some improvement measures of Genetic Programming (GP) in data fitting, including developed new ways of crossover and mutation, improved the calculation efficiency greatly, and avoided the problem of parse tree expansion. The new adopted mutation method improved the problem of constant modification to some extent. Numerical simulation obtained a considerable good fitting and prediction precision.
Structure Design of a New Kind of Rotary Refrigeration Compressor
Authors: Li Jie , Ou Yang Xin Ping , Zhang Lian Jie
Published: February 2011

This paper introduces the working principle and components structure of a new kind rotary refrigeration compressor which receives the merits of some existing rotary refrigeration compressors and discards some application limitation. The new type refrigeration compressor has the characteristics of fewer parts as well as simple structure, easy manufacturing, smooth operation and wide application capacity. In this paper the author puts emphasis on the discharge structure, capacity regulation mechanism, piston flexibleness and seal body.
Study on Physical Simulation Experiments of Different Chemical Displacement Systems
Authors: Wu Wen Xiang , Mu Deng Hui , Liu Qing Dong
Published: February 2011

In the reservoir condition of Liaohe oil field, the indoor physical simulation experiments of polymer / surfactant binary combination flooding and polymer / surfactant / alkali (ASP) flooding in the artificial cores have been conducted. The results show that enhanced oil recovery of polymer flooding is about 24.4%, by utilizing experiment project that polymer molecular weight is 19 million, main slug concentration is 1500mg/L. Binary flooding system that molecular weight of polymer is 19 million, main slug concentration is 1500mg/L, 0.3% surfactant YR has improved the oil recovery by 30.1%. The ASP flooding system (19 million 1500mg/L polymer +0.3% surfactant SS+ 1.2%Na2CO3) has improved the oil recovery by 28.4%. It can be seen that the binary flooding system is best.
Trend Analysis of the Slow-Speed and Heavy-Load Equipment with Acoustic Emission
Authors: Li Min , Yang Jian Hong , Xu Jin Wu
Published: February 2011

The application of AE measurement for condition monitoring of the slow-speed and heavy-load equipment is gaining ground. However, different AE features are sensitive to fault in varying degrees when they are employed in the trend analysis. Therefore, in this paper the focus is on the selection of the appropriate AE features for the trend analysis. First the AE features are ranked by Laplacian Score method according to their importance, and then a new feature index is obtained by the fusion of the features with their ranking scores, which serve as weight coefficient in this condition. The degradation data of the bearings in the belt conveyor are used to prove that the proposed method is effective.
The Effect of Coefficient of Thermal Conductivity of Fabric-Layer on Human Body Temperature Fields
Authors: Li Jing
Published: February 2011

Through founding the mathematical model of heat and mass transfer, discussing quantitatively the temperature fields distribution in the case of body wearing cloth has an important significance in the lucubrate of garment thermal comfortability. Establishment of the 2D heat transfer model about upper arm is according to the characteristics of the arm’s heat and mass transfer. The distributing of temperature fields of upper arm transverse section under human wearing varying fabrics is accepted by using finite element analysis software ANSYS. This method can be extended to the whole body temperature fields. And the results have an important reference value for the study of garment thermal comfortability.
Study on Industrial Waste Sites Monitoring Based on Remote Sensing Technology
Authors: Zhao Wen Hui , Liu She
Published: February 2011

Large scale of the industrial waste is not timely disposed of due to economic rapid development. It is the main reason why environmental pollution problem is getting more and more serious and we should monitor the pollution of industrial waste. A MODIS (Moderate Resolution Imaging Spectroradiometer) senor is used for long-time and dynamic environment monitor because it has advantages of high time resolution and high spectral resolution characteristics etc. SPOT satellite data is used to analyze the ground vegetation for its higher ground resolution and rich product data bases. The influence of industrial waste on environment is analyzed and the result of research is verifyed with the information of local meteorological agent and observation data of site. This method can be used for monitoring wide-range industrial waste and have good performance of monitoring and early warning industrial waste sites which are in mountainous area.
Effect of Different Packaging Films on Senescence of Pleurotus Nebrodensis Auto MAP
Authors: Li Xi Hong , Xue Ting , Li Yuan Yuan , Chen Li
Published: February 2011

Pleurotus nebrodensis were packaged with PVC and PE with different thickness (0.03 mm and 0.05 mm) at 4°С. Package gas composition, respiration rate and relative electrolyte leakage were measured during storage at 4°С and 95%RH for 28 days. The results showed that auto modified atmosphere pattern would be formed at 7th day of the storage. The atmosphere concentration in the package of 0.05 mm films was 0.1~5% O2and 6%~10%CO2after 7days, then maintaining the atmosphere concentration stable in the following days of the storage test. Compared to the 0.03 mm film, the 0.05 mm film was more effective for decreasing respiration rate and electrolyte leakage of pleurotus nebrodensis to delay its senescence. It could be taken for granted that pleurotus nebrodensis was apt to storage in the circumstance of low O2and high CO2.
The Optimum Design of Large-Scale Inner-Tower Truss-Supporting Structure Based on Finite Element Analysis
Authors: Wang Xiao Jing , Li Dong Hui , Gao Zhi Hu
Published: February 2011

A kind of truss-work used in large-scale tower is introduced in this paper. According to this example, a method of optimization design using the optimum function of ANSYS, which is one of the finite element software, is searched and discussed.
The Regenerative Experiment of Activated Alumina Granules
Authors: Wu Dao Ji , Li Ding , Weng Li Rui , Zheng Wei Jie , Qu Xiao Yan
Published: February 2011

Activated alumina granules is a primary sorption media . The intention of this experiment is to get out of the difference between the different regenerate medias, caustic soda and alumina sulfate . Experimental result shows the renewal adsorption capacity of activated alumina using caustic soda regenerate is more than using aluminum sulfate .Under the same experiment condition ,aluminum sulfate can regain 13.27mg/g adsorption capacity while using 0.8 per cent caustic soda to regenerate alumina and 5.36mg/g using 4 per cent aluminum sulfate .The intensity of activated alumina granules reduces when we use caustic soda as regenerate media .The mass wastage of activated alumina granules is between 12% and 14% using caustic soda as regenerate media and between 6% and 8%uing aluminum sulfate .It is needed to neutralized by hydrochloric acid or aluminum sulfate after regenerated by caustic soda .Without neutralized, the concentration of treated water is over 1.0mg/l in the beginning.And neutralized with hydrochloric acid or aluminum sulfate, the efficacious run time can achieve 23 hours and 31hours .
Research and Analysis of the Effects of Building Height on Wind Vibration Sensation in High-Rise Steel Structure
Authors: Zhang Hong , Chu Shi Gang , Liu Yong Hui
Published: February 2011

With social progress and technological development, especially the applications of analysis of structural material ,structural system, and construction scheme ,high-rise buildings are becoming higher, lighter and more flexible.Therefore, the paper aims to make designs in accordance with requested comfort sensation, by providing practical measures.Judging standards adopted in this paper is top maximum acceleration, along with variation trend derived from analysing comfort sensation difference between cross-wind and along-wind acceleration.
Study and Application of Bridge Structure Finite Element Model Updating Based on Static-Load Testing
Authors: Deng Miao Yi , Li Fuen
Published: February 2011

A method for continuous box-girder bridge structure finite element (FE) model updating based on static-load testing is proposed. The procedure includes field static-load testing, FE modeling, FE model (parameter) updating, etc. Based on this procedure, the structure FE model updating for an expressway 5-span pre-stressed concrete continuous box-girder bridge is conducted. And the bridge structure static FE model, which is consistent with the static-load testing actual measure response, is gained. The updated FE model (parameter) is foundation of structural performance evaluation for the bridge.
Cooling Process after HTST Orange Juice Sterilization Optimization Based on CFD
Authors: Wang Jin Feng , Xie Jing , Tao Le Ren , Wang Yong Hong , Yang Xin Yu
Published: February 2011

In order to study the juice cooling process after sterilization to obtain the accurate process and reduce the energy used in the cooling, the orange juice in can high temperature short time (HTST) sterilization process was calculated. The maximum temperature of juice in can was defined as 60°C. By using FLUENT, a kind of software which combines hydrodynamics, mathematics and computer technology, we were able to put different fluids into analog computation and numerical experiment to solve problems related to hydrodynamics. Orange juice cooling numerical experiment after HTST sterilization was carried out. The optimization cooling process was obtained: 20°C(293K),14 minutes;15°C(288K),13 minutes; 10°C(283K) ,13minutes; 5°C(278K), 12minutes and 0°C(273K), 12minutes. Using Carnot efficiency in Reverse Carnot cycle, the energy consumption was: 288W, 325W, 348W, 391W, 417W in accordance. And in the result, the optimized process was : 20°C(293K),12 minutes.
Symmetric Beauty: Multi-Point Press Based on Parallel and Synchronous Toggle Mechanism Driven by Pneumatic Muscle
Authors: Qin Pei Liang , Wang Ming Di , Zhong Kang Min
Published: February 2011

Compared with the traditional rigid pneumatic cylinder, the pneumatic muscle has many outstanding advantages such as large ratio between output force and diameter, large ratio between output force and weight. However, it can only provide the tension, can not provide the thrust force, it is a one-orientation output force component. In this paper, two different diameters pneumatic muscle, combined with the parallel and synchronous toggle force-amplified mechanism,a new type of multi-point press has been innovated. The large-diameter pneumatic muscle will be used for the working stroke of the pressure travel, while the small-diameter pneumatic muscle will be used for the return travel. The tension of the pneumatic muscle will decrease with the increases of the contraction; the force-amplified coefficient of the toggle mechanism will increase with the decrease of the pressure angle, which is taken full account of this complementary relationship between them. So the output force curve of the press is improved smoothly.
Application of Materials on Foil Thrust Bearings for Micro Turbines
Authors: Zhou Quan , Hou Yu , Chen Ru Gang
Published: February 2011

Foil bearing that has a soft surface is a kind of air bearing. The performances of foil bearings are greatly affected by the materials of bearing surface, which is called foil element. In order to estimate the performance of foil bearings, two kinds of foil thrust bearings that are made of different materials respectively were tested in a micro turbine system, which contains rotation part and static part. Load capacity and stability of these foil thrust bearings were investigated in experiments. The results show that bearing which contains rubber has higher load capacity and bearing which contains copper foil has higher stability. According to the work in this paper, applications with different requirements can adopt suitable foil thrust bearing.
Physical and Electrical Properties of Lead-Free (Na0.5K0.5)NbO3-(Bi0.5Na0.5)TiO3 Ceramics
Authors: Wang Chun Huy
Published: February 2011

Lead-free (1-x)(Na0.5K0.5)NbO3-x(Na0.5Bi0.5)TiO3(x=0.02, 0.04, 0.06, 0.08, and 0.10) ceramics have been prepared by the conventional mixed oxide process. For 0.98(Na0.5K0.5)NbO3-0.02(Na0.5Bi0.5)TiO3ceramics, the electromechanical coupling coefficients of the planar mode kp and the thickness mode kt reach 0.33 and 0.62, respectively, after sintering at 1100°C for 5 h. The ratio of the thickness coupling coefficient to the planar coupling coefficient is 1.88. Our results show that 0.98(Na0.5K0.5)NbO3-0.02(Na0.5Bi0.5)TiO3solid solution ceramics are promising lead-free ceramics for high-frequency electromechanical transducer applications.
Catalytic Hydrothermal Depolymerization Technology and Kinetics of DGEBA/EDA Epoxy Resin
Authors: Zhang Jian Qiu , Deng Wu Yan , Zu Jian Hua , Ding Hong Bo , Cai Pei
Published: February 2011

Depolymerization of thermosetting epoxy resin with environmental-friendly heteropolyacid catalyst at temperatures between 270°C-350°C in H2O medium. The effect of the factors catalyst, temperature and time on the depolymerization was researched. UV spectrum was used to characterize the thermal stability of heteropolyacid catalyst. The products of depolymerization were analysed qualitatively and quantitatively by means of GC/MS and GC. The results indicated that the main depolymerized products were phenol, p-isopropylphenol and bisphenol-A (BPA). The results showed adding heteropolyacid contribute to enhancing the rate of depolymerization and increasing the yield of BPA. Also, the depolymerization kinetics of epoxy resin was researched and the activation energy was calculated.
Novel and Saving Energy Lifting Permanent Magnet Design
Authors: Ding Ning , Zhang Ding Tong , Pei Yi Zheng
Published: February 2011

An novel Rare Earth Lifting Permanent Magnet was designed, which can completely overcome the disadvantages found from conventional lifting electromagnet. The working principle of Rare Earth Lifting Permanent Magnet is developed. At the same time, a perfect self-acting driving system was invented, which guarantees that the attracted ferromagnetic cargo or products can be picked up or unloaded fast and conveniently without using any electricity at all. Industry prototypes were manufactured, and they verified that the proposed Rare Earth Lifting Permanent Magnet was feasible.
Design and Simulation of the Cleaning Parts of Comb-Type Cotton Picker
Authors: Yuan Yi Ping , Sun Wen Lei , Huang Shuai , Ni Yi You
Published: February 2011

The Qing-ling machine is the cleaning part of Comb-type cotton picker. Its working performance directly affects the complete machine efficiency. In order to improve popularizing rate of Comb-type cotton picker, combining with the cotton varieties, the plant characteristics, climatic conditions and the harvests requirements in Xinjiang, the reasonable structures, transmission system and design parameters of Qing-ling machine are put forward. Virtual prototypes of key components are set up under Pro/E. the kinetic simulation data are obtained by using ADAMS. Simulation results prove design correctness and provide relevant data for further research.
Study on the Blend Film Prepared by Chitosan and Gelatin
Authors: Wang An Na , Wu Li Gen , Li Xiu Ling , Sun Yu Dan , Wang Jie , Wang Shao Wen , Jia Ai Xia , Wang Chao , Zhang Yuan Yuan , Fu Qin Qin , Xu Xiang Ying
Published: February 2011

The viscosities of blend solution mixed with various concentration of chitosan and gelatin were investigated and the properties of the blend films prepared by gelatin and chitosan were studied by FT–IR, DSC and SEM in this paper. The results indicated that the viscosity of blend systems increased with the concentration increasing of chitosan, and that of mixed solution decreased with the concentration increasing of gelatin; there existed strong interactions between chitosan and gelatin molecular chains through hydrogen bond formation and chemical reaction; the surface of blend film had a relatively uniform and compact surface and the thermal stable of blend film was higher than pure gelatin film.
Impermeability of Wet-Sieving Fine Aggregate Concrete Made from Ordinary Concrete
Authors: Li Xiao Ke , Zhao Shan , Sun Li , Zhao Shun Bo
Published: February 2011

The research is part of wet-sieving concrete technique for building thermal insulated reinforced concrete composite wall. The fine aggregate concrete is made from ordinary concrete passing sieve with square mash of 15 mm for casting surface concrete layer of the wall, the recomposed concrete is made of residual concrete stayed on sieve and ordinary concrete for casting reinforced concrete structural wall. The impermeability of fine aggregate concrete and recomposed concrete are measured by water permeation method and chloride-ion permeation method, the relative permeability and chloride-ion diffusion coefficients of concrete are determined. Based on the test, the effects of the changes of aggregate series, sand ratio and cement paste on the impermeability of concrete are analyzed.
Fluid-Structural Coupling Analysis of Composite Material Blades for the Offshore Wind Power Generator
Authors: Tsai Gwo Chung , Li Wei Shiue , Chang Yun Yuan , Tseng Jui Tang
Published: February 2011

This article will perform the fluid-structural coupling analysis of composite material blades of the offshore wind power. The computer engineering software GH Bladed is used to get the wind pressure on the offshore wind power generator, than ANSYS engineering software is used to calculate the stress and strain distribution in the blades. From the analytical results, the stress distribution in the blades can be a basic data to design a new blade for the offshore wind power generator.