bluuebunny/crossref_metadata_2025 huggingface dataset:
The Research of Pedestrian Platoon Multiple Events at Signalized Intersection
Authors: Zhang Hui , Yu Quan , Rong Jian , Shi Li Ping
Published: August 2011

This paper studies the multiple events character of pedestrian platoon with the technique of video analysis. Meanwhile, applying K-means cluster, we select three criterions which are the average speed, the width and the length of pedestrian platoon, the crossing process was divided into multiple events at signalized intersections. The application of cluster analysis in the division of multiple events was proved through case study, and it reflected the phased characteristics of pedestrian platoon.
Sensor Compensation Based on Adaptive Ant Colony Neural Networks
Authors: Wang Xiu Fang , Liang Chong Chong , Jiang Jian Guo , Ju Li Li
Published: August 2011

In order to improve work stability and measurement accuracy of drilling inclinometer, and overcome the poor stability of Elman networks and lower compensation precision of genetic Elman neural networks, we combined ant colony algorithm and neural networks, using the Adaptive Ant Colony Algorithm that its pheromone evaporation factorand pheromone update strategy adjust adaptively to optimize Elman neural network weights and thresholds, and applied it to drilling inclinometer sensor compensation. Simulation results show that the compensation effect of adaptive ant colony Elman neural networks is better than that of Elman networks and genetic Elman networks, the compensation accuracy is 10-8.
Surface Shape Measurement Using Extended Photometric Stereo
Authors: Zheng Zuo Yong , Yang Bin
Published: August 2011

Photometric stereo is a widely-used non-contact optical technology for surface shape measurement in industry. However, it is subject two limitations: (1) all light directions used should be known; (2) reflection on the surface to be measured should obey the Lambertian model. In this paper, an extended photometric stereo is proposed to overcome these limitations. Firstly, initial light directions are estimated in terms of normals of those points on the silhouette; secondly, an iterative process is established to refine alternately both the normals and all light directions, with specular pixels removed; at last, the final surface shape is worked out by integrating the normals. Experimental results show the considerable feasibility of this algorithm.
Research on Testability Evaluation Method of Complex Equipment Based on Test Data in Development Phase
Authors: Chang Chun He , Yang Jiang Ping , Cao Peng Ju
Published: August 2011

Due to the lack of valid testability evaluation methods for complex equipment in the final phase, a new testability evaluation method based on test data in development phase is proposed. The problems that classic statistic method can produce the conclusion with low confidence level and high risk under the condition of small sample are effectively solved. This method adopts mixed prior distribution and determines the inheritance factor by using chi-square goodness of fit between the history test information and the field information. Finally, the fault detection rate of certain large-scale radar equipment is validated. The analysis result of the practical case proves that this method can produce evaluation conclusion with high confidence level, and shows that this method is more rational than the classical statistical method and the traditional Bayes method.
Quantitative and Comprehensive Evaluation of Qualitative Indices in Dam Safety Monitoring
Authors: Xu Bo , Xia Hui , Yao Yuan
Published: August 2011

Since there are few methods to evaluate the qualitative index in dam safety monitoring and the evaluation system is imperfect, in this paper a new quantitative and comprehensive evaluation method for qualitative index is explored with the introduction of the method of interval marking, Set-Valued Statistics, grey theory and Jousselme distance function. Firstly, the interval marking method and Set-Valued Statistics are used to obtain the comprehensive quantitative value; then the evaluation class of the comprehensive quantitative value is quantified and the evidence vector is obtained through grey theory; next the weights of all qualitative indices are obtained through Jousselme distance function; finally the comprehensive influence of the qualitative indices on dam safety is determined by using the evidence vector and weights. The case study proves that this method is feasible which can reasonably determine the influence of qualitative index on dam safety.
Initial Design of FAST Engineering Surveying Control Network
Authors: Luo Ya Bo , Zhu Li Chun , Ma Wei Li
Published: August 2011

The high precision surveying control network provides the positional and orientation datum for the construction and measure-control system of the Five- hundred-meter Aperture radio Sphere Telescope(FAST), which is deployed at the typical Karst depression. The design of the control network is in accordance with the 1:1000 topographic maps. The issues about the control station site selection ,distribution and construction are analyzed and discussed, and the initial results are provided in this paper.
The Slipping Shoe Motion Trajectory Analysis and Simulation of Spherical Swashplate Type Axial Piston Pump
Authors: Chen Yong Qin , Chen Jian Jun , Su San Mai
Published: August 2011

Spherical swashplate type axial piston pump slipping shoe hole shape and reasonable position design is key points for pump working. Current calculation method which adapted average parameters as final size is not accurate in theory. In this paper ,according to the relationship between geometry and motion of piston pump, coordinate transformation is used three times to deduce motion trajectory equation,and drive motion trajectory curve. The method discussed is precise ，it can be used to provide reference for slipping shoe hole design.
Integrated Application of Three In Situ Stress Measurement Techniques
Authors: Li Yuan , Qiao Lan , Sui Zhi Li
Published: August 2011

The CSIRO overcoring stress relief and hydraulic fracturing methods are the most popular methods used for the measurement of in-situ stress at depth. One major advantage of the CSIRO overcoring stress relief method is that the three dimensional state of stress can be obtained, but the measurement must be done in an excavated tunnel[1]. Hydraulic fracturing method can be carried out on the ground surface, but it assumed that one of the principal stresses direction is vertical[2,3]. In terms of the disadvantages of the two methods, the techniques based on core orientation and acoustic emission behavior of rocks are incorporated in the in-situ stress measurement in order to obtain the in-situ stress conditions at depth in Shuichang Iron Mine. According to the comparison of the measurement data obtained from the acoustic emission test in the laboratory and CSIRO overcoring stress relief measurement in the field, effectiveness of the acoustic emission test is confirmed. In addition, the relationships between in-situ stresses and tectonic settings are analyzed. Finally, the distribution of in-situ stresses in Shuichang Iron Mine is given, which provides a meaningful guideline for the following mining and design.
Study on a Method to Measure Welding Arc Plasma Axis Temperature at Fixed Point
Authors: Yu Zhi Li , Lu Feng Gui , Liu An Hua
Published: August 2011

In this page, arc imaging system was estabished with the double agglutination lens ,screen , dimmer glasses, aperture and precise mobile platform. The imaging system was aligned by laser, so that clear and magnified image could be shown on receiving screen basing on this system which is helpful for the specific position of measuring temperature . Spectroscopic diagnostics about welding arc plasma were carried out with this system and spectrometer HR4000CG-UV-NIR . Argon I spectral lines were chosen for calculation from welding arc spectrum collected and the modified double-line method was used to calculate arc temperature . The arc temperature measured with this method in this paper is similar to the result reported in the literatures. The experiment results show that the system established to measure the arc plasma axis temperature at fixed point is possible.
Acoustic Method of Detection of Optical Thin Films Damage
Authors: Ding Yi , Su Jun Hong , Liang Hai Feng
Published: August 2011

Laser damage threshold of optical thin film is a critical parameter in measuring laser induced damage. The key to testing damage threshold is judging the injury incident accurately. It has been found that when high-energy laser on the film, there will be sounds generated. In the present paper, acoustic method was applied to determine thin films damage. A brief analysis will be given on feasibility of acoustic method in judging thin films damage. Acoustic acquisition system will be established. In the experiment, we will average laser energy into 10 grades, each grade test 10 points. The sound wave of each point will be record. At the same time, we use image method judge damage of the thin films and record the result. By studying the sound waves of the thin films in different laser energy，it is easy to judge whether the optical films is damaged. The measured result is compared with image method. Both of them have a preferable consistency. The analysis shows that the acoustic method can be used effectively to determine laser-induced damage and it can be used in online inspection conveniently.
Virtual Instrument-Based Cable and Harness Test System Hardware Design and Development
Authors: Wang Qi
Published: August 2011

The virtual instruments utilize the powerful graphic environment and on-line help of computer to establish the virtual instrument panel and control the instrument, analyze and display the data, replace the traditional instruments and change their using modes, improve their functions and efficiency. This system utilized the virtual instruments technology, and PC/104 bus-based embedded data acquisition to develop the cable and harness test hardware system.
Lab Windows/CVI Platform-Based Cable and Harness Test System Software Design
Authors: Wang Qi
Published: August 2011

As a link maintaining an interconnection relationship, the cable and harness are widely used for many fields such as electronic measurement, chemical industry, electric engineering, mineral exploration, medical treatment, vibration analysis, acoustic analysis, fault diagnosis and teaching & research etc, so the testing of cable and harness is very important. This system utilized Lab Windows/CVI as the core control software, developed the cable and harness test software system on the basis of hardware equipment. According to the different properties of testing parameters, respectively designed the corresponding test methods, through software setting, process and compare the data read-back, and determine whether the technical parameters of cable and harness are qualified or not according to the specified determination basis.
A SAT-Based Pattern Generation Method for Diagnosis Multiple Scan Chain Faults
Authors: Wang Fei , Wang Da , Yang Hai Gang
Published: August 2011

Scan chain design is a widely used design-for-testability (DFT) technique to improve test and diagnosis quality. However, failures on scan chain itself account for up to 30% of chip failures. To diagnose root causes of scan chain failures in a short period is vital to failure analysis process and yield improvements. As the conventional diagnosis process usually runs on the faulty free scan chain, scan chain faults may disable the diagnostic process, leaving large failure area to time-consuming failure analysis. In this paper, a SAT-based technique is proposed to generate patterns to diagnose scan chain faults. The proposed work can efficiently generate high quality diagnostic patterns to achieve high diagnosis resolution. Moreover, the computation overhead of proving equivalent faults is reduced. Experimental results on ISCAS’89 benchmark circuits show that the proposed method can reduce the number of diagnostic patterns while achieving high diagnosis resolution.
A Vernier Delay Line for Time Interval Measurement
Authors: Wang Xin Gang , Wang Fei , Yang Hai Gang
Published: August 2011

This paper presents a Vernier Delay Line (VDL) for time interval measurement. A dedicated multiplexer is inserted into each stage of the proposed VDL. As a result, the D-flip-flops in each stage can be served as a large delay cell as well as a traditional arbiter. Moreover, the proposed interface circuit can save time residue out for further fine granularity measurement. Experimental results show that the proposed VDL achieves a 30ns measurement range with 6600 transistors.
Synthesis and Characterization of CuInS2 and CuInSe2 Compounds by Vacuum Sintering Method
Authors: Wang Zhen Dong , Lai Zhen Quan , Chen Guo Rong
Published: August 2011

We report herein synthesis and characterization of CuInS2and CuInSe2compounds by vacuum sintering method. In this study, the manual-milled and ball-milled precursors including copper, indium, and sulfur (selenium) elements were sintered under vacuum at different temperatures for synthesis of CuInS2and CuInSe2compounds, respectively. The crystal structure, morphology and Raman property of the sintered powder were investigated by X-ray diffraction, scanning electron microscope and Raman scattering spectroscopy, respectively. The results show that the structure of the products, which was sintered with the manual-milled and ball-milled precursors, were transformed into the single chalcopyrite phase CuInS2powder at 923K and 623K, and the grain size are about 2～3μm and 250 nm, respectively. In addition, the CuInSe2 powder was synthesized about 723K via using the ball-milled powder including copper, indium, and selenium elements as the precursor.
Ab Initio Studies of Nb Doping Effect on the Formation and Diffusion of Oxygen Vacancy and Ti Interstitial in Rutile TiO2
Authors: Wang Xu , Wang Fu He
Published: August 2011

The effect of Nb doping on the formation and diffusion of O vacancies and interstitial Ti in rutile TiO2 are studied by the use of ab initio density-functional calculations. Our calculation showed that the activation energy for the diffusion of O vacancy with Nb doping is higher than that of pure. That owing to suppressive effect of Nb doping on the formation of O vacancy. Different from the effect of Nb doping on O vacancy, both of the formation energy and migration barrier of interstitial Ti increase with the Nb doping. Our calculated results may be one of the reasons why Nb doping can improve oxidation resistance of γ-TiAl.
Defect Induced by Heated Treatment in Silica Fiber Material
Authors: Xiao Zhong Yin , Luo Wen Yun , Wen Jian Xiang , Yin Jian Zhong , Wang Ting Yun
Published: August 2011

In this paper, defect induced by heated treatment in silica is studied. The formation process of defect is analyzed by the thermodynamic model. The results show that defect can be produced by thermal treatment process. The concentration of defect can be affected by many factors. The defect formation induced by heated treatment is related to the initial precursors. To pure silica glass, the precursors mainly come from the strained bonds of network. It can produce centers and nonbridging oxygen hole centers (NBOHCs). These defects are also related to the temperature of heated treatment and the conversion frequency between precursors and defects. The changes of defect concentration with temperature and conversion frequency are also discussed in detail.
The Influence of Different SHS Reaction Systems on the Properties of the Ceramic
Authors: Mao Yan , Hu Tian , He Le , Ju Guang Yu , Luo Chuan Hong
Published: August 2011

This paper has described the method to make Al2O3-based ceramic coating in the steel tube by using centrifugal SHS reaction involving Fe2O3 or CuO and Al. It has also analyzed the influence of three different self-propagating reaction systems on properties of the ceramic coating. Studies have shown that an appropriate increase of the reaction heat will help to improve the properties of the ceramic coating, such as ceramic coating’s porosity, purity, hardness, strength, wear and corrosion resistance as well. This paper provides a theoretical basis for the selection of SHS reaction system to make metallic ceramic coating .
Modeling of Biomimetic Robotic Fish Propelled by Passive Tail with Suitable Rigidity
Authors: Hu Qing Song , Chen Juan , Zhou Hua
Published: August 2011

This paper proposes a physics-based cruising speed model for biomimetic robotic fish propelled by the passive plastic foil actuator. Inspired by biological body and fins, a plastic foil with suitable rigidity and innovative structure are designed to acquire better propelling effect. The model captures the speed based on the analysis of the interaction between the tail and the water which considers the hydrodynamics. Experimental results have shown that the proposed model is able to predict the steady-state cruising speed of the robotic fish under a periodic actuation input. Since most of the model parameters are expressed in terms of fundamental physical properties and geometric dimensions, the model is expected to be beneficial in optimal design of the robotic fish.
Sliding Mode Current Observer for Sensorless Vector Control of PMSM
Authors: Zhu Yong Hua , Ye Wen Tong , Chen Yong
Published: August 2011

The sensorless control system of permanent magnet synchronous motor is a system with an uncertainty and external disturbance. This paper uses the control law of equivalent control matched with switching control according to the theory of variable structure with sliding mode control, and achieves a robust control of the uncertainty and external disturbance. In order to eliminate the adverse effect caused by the chattering of the sliding mode, a saturation function of the quasi-sliding mode is used instead of the traditional sign function. Simulations and experiments prove that this control technology has a nicer dynamic and static performance.
Shear Horizontal Surface Waves in a Functionally Graded Magneto-Electro-Elastic Half-Space
Authors: Yang Qian , Kong Yan Ping , Liu Jin Xi
Published: August 2011

We investigate the propagation of shear horizontal (SH) surface waves in a functionally graded magneto-electro-elastic half-space with hexagonal (6mm) symmetry. The material properties vary in the direction perpendicular to the free surface. The surface of the half-space is mechanically free, but subjected to four types of electromagnetic boundary conditions. These boundary conditions are electrically open/magnetically closed, electrically open/magnetically open, electrically closed/magnetically open and electrically closed/magnetically closed. The effects of the electromagnetic boundary conditions and the variation of material properties on the propagation characteristics of SH surface waves are analyzed. The results obtained show that except for the electrically open/magnetically closed condition, three sets of other electromagnetic boundary conditions sustain the propagation of SH surface waves. Different from the case in homogeneous materials, the existing SH surface waves in functionally graded half-spaces are dispersive.
Preparation and Separation Properties of Cyclodextrin-Segmented PU Membranes
Authors: Ye Hong , Wang Jing , Feng Xu Dong , Liang Hai Yan
Published: August 2011

Polyurethane (PU) pervaporation (PV) membranes are promising for the recovery of aromatic compounds in water. The novel cyclodextrin-segmented PU membranes were prepared using polybutadiene (HTPB) as soft segment and 4, 4’-diaminodiphenyl methane (MDA) and β-cyclodextrins (β-CDs) as chain extenders. The membranes had the special structures with β-CDs chemically segmented in PU backbones. The structures of these membranes were characterized by means of FT-IR and the swelling characteristics of those were studied. Furthermore, the PV performances were investigated for separating phenol/water mixtures at different temperatures. The results showed that the β-CDs-segmented PU membrane had better permeability and selectivity than those with β-CDs physically mixed. For 0.50 wt% phenol in feed mixture at 60 °C, these membranes had a flux of 4.05 kg µm m-2 h-1 and separation factor of 25. The permeation fluxes increased with the increased feed temperature, while the separation factors decreased.
Design and Research of Multi-Channel Temperature Calibration System Based on the LabVIEW
Authors: Hu Bing , Liu Xi Jun
Published: August 2011

According to industry and agriculture domain which applied temperature sensor need calibration. It is proposed the temperature calibration system design which based on the environmental of the LabVIEW programming to complete the parameter calibration and characteristics analysis of temperature sensor. The design communicates to serial bus by VISA programming interface to complete setting the temperature of the FLUKE9171 temperature calibrator, and get the temperature informations of the Multi-channel DS18B20 temperature sensor. It demarcates the collected data by using the method of the curve fitting, to complete the accurate calibration of the the temperature which collected by temperature sensor. The whole system design is parameters custom, intelligent, self-adaption, which has been applied on a sensor calibration system.
Evolvement Model of Eco-Industrial Cluster - Research Based on Complex Adaptive System
Authors: Qin Sun Tao , Fu Wei Wei
Published: August 2011

By using the theory of complex adaptive system(CAS), a searching analysis of Eco-Industrial Cluster was put forward by the strategy of control, organization and evolvement,then proved that Eco-Industrial Cluster system is a real complex adaptive system(CAS), a relevant concept model was built up, and then a dynamic simulation modeling for Eco-Industrial Cluster also constructed on SWARM platform. By researching the complexity, creativity, learning and adaptability of the system, the author was trying to build up a new theory and practice method for both programmers and managers of Eco-Industrial Clusters.
Agroforestry Systems in Northern Temperate Zone and Productive Perspectives
Authors: Liu Ting Xiang , Zhang Shu Wen
Published: August 2011

As the traditional land application system, agroforestry systems had developed quickly in decades for the demand of agriculture, forestry and sustainability science under the background of global changeing. In this review, the authors described the classification of agroforestry systems in Europe, China and North America based on their components, spatial&temporal arrangement, function, and agro-ecological zone. Then, this paper discussed the productive characteristics of crop and tree components, especially for elevated CO2. Some directions considering research focuses and problems are suggested in China.
Study on Effects of Organic Carbon Emission of Land Use Change in Shenzhen City, China
Authors: Liu Wei Ling , Zhang Lin Bo , Ye You Hua , Zou Jian Feng
Published: August 2011

The effects of terrestrial carbon cycle caused by Land use change on are obvious. Urbanization is an important reason of land use change. Based on the soil and plant data that field sampled, five remote sensing data of 1979, 1989, 1995, 2000 and 2003, the effects on ecosystem organic carbon pool from1979 to 2003 caused by land use change in Shenzhen city are analyzed. The land use changes are mainly occurred between the following 8 land types, farmland, wood land, grass land and construction land. The results show that form 1979 to 2003 carbon emissions caused by land use change in Shenzhen City totally reduced by 337.24 × 104Mg C (1Mg C = 1 × 106g C). The average annual carbon emissions arrive up to 24.09 × 104Mg C. Among them, the emissions caused by the reductions of farmland and forest area are respectively 252.26 × 104Mg C and 111.73 × 104Mg C. The organic carbon increment caused by garden land increase is 47.37 × 104Mg C. The results show that Urbanization process totally is a carbon sink process. The study is valuable for assessing the relations between carbon effects and land development and ecological restoration planning in the process of rapid urbanization.
Simple Balance Computing Studies Distilled in the Process of the Oil Distillation Based on Excel
Authors: Shi Zhao Hui
Published: August 2011

Based on the Excel software , we have studied the Numeric computations and quantitative research of the easy balance to distill for the distillation process, we could use Excel to achieve the calculation in five cases about the ideal system of two-component foam and flash of dew point problems.Also we could analyze the impact of reduced pressure on its equilibrium. Calculations show that Pressure-relief can greatly reduce the bubble and the dew point of the Ethyl Benzene - Styrene Mixtures , but the relative volatility increases little, having little effects on the degree of difficulty of separation.In vacuum distillation, the relative volatility α with the liquid phase mole fraction x changes almost nothing. We can also confirme that Excel has the versatility, which is simple and easy to master.It’s own library functions can be used the power of simple programming,in iterative calculations and data fitting, etc. which is of the complex chemical process.
Optimization Problem of Excel Programming Calculation for Mayonnaise Prescription
Authors: Luo Zhi Yang , Zhao Hong Xia , Yuan Xin , Li Yuan
Published: August 2011

The method combining linear programming theory and computer technology, affords the possibility for the Optimization problem of food prescription in engineering design. Excel's Solver function may be used to solve problems with up to 200 decision variables, enough to calculate the most problems about food prescription. Combined design requirement of mayonnaise prescription, the decision variables, constraint condition and mathematics model of cost are established. The optimization prescription of minimum cost is gotten through the function of Excel programming calculation. It may provide valuable reference for the application of computer in prescription design.
A Meteorological Data Service System and its Application
Authors: Yu Xin Wen , Yang Yan Chen , Zhang Xu
Published: August 2011

Meteorological conditions play an important role in agricultural practice and agricultural DSS usually takes weather data as a critical data source. A meteorological data service system was designed and implemented to provide better performance for Chinese users. Based on the service system, a web application providing online weather data retrieval and downloading was also developed. The service system was practically used in a decision support system for eucalypt management, and proved to be very feasible as an online weather data source for agricultural decision support system. Base on this service system, it is expected that agricultural researchers and decision support systems can easily obtain weather data and further improve their agricultural decision making process.
Nondestructive Measurement Model of Apple Internal Browning Based on FT-NIR Spectroscopy
Authors: Li Gui Feng
Published: August 2011

A rapid and nondestructive method for measuring internal browning of apple was put forward based on FT-NIR spectroscopy and the relationship between NIR spectroscopy nondestructive measurement and internal browning was developed. The NIR spectroscopies were acquired from 512 apples. Cluster analysis algorithm based on Euclidean distance was applied to selection of representative samples. The multivariable analysis concluding partial least squares (PLS) and multiple linear regression (MLR) were applied to build the regression models. The excellent model with high R2 (0.871) was obtained by PLS based on 3 wavelength ranges (950–1440 nm, 1480–1890 nm, 1960–2300 nm) and with multiplicative scatter correction (MSC) pretreatment. These suggest the model of apple internal browning was reliable with good predict ability and can meet the requirement to quick determination of internal browning of apples.
Modeling, Simulation and Automatic Control of Long Distance Water Transfer in Winter
Authors: Liu Guo Qiang , Wang Chang De , Guan Guang Hua , Yan Yi Bo
Published: August 2011

In order to automatically control the long distance water transfer in winter, mathematic models, modes of water transfer in winter, operation methods and control models of long distance canal system are introduced. After receiving the cold current forecast, the discharges must be reduced so as to decrease the flow velocity. When the flow velocities are all below 0.4m/s, ice flowers will accumulate and form ice cover. Then the canal system successfully achieves transition from normal open flow state to icing model state. This paper points the present research process and the further research issues.
Properties of Blends Combined with Corn Flours and Wheat Flours
Authors: Wang Yuan , Gao Hai Yan , Sun Yao Jun , Chen Ming
Published: August 2011

Rheology of composite flour between corn or extruded flour and wheat flour were studied. Corn flour and extruded flour greatly influenced the water absorption, development time, stability, degree of softening of composite flour. Composite flour (70:30) had better dough quality than other ratios of blends and the cold viscosity was appropriate for preparing dough.
Harmonious Labelings of Cj∪Ck∪Cl
Authors: Xi Jie
Published: August 2011

The disjoint union Cj∪Ck∪Cl is component of three cycles Cj, Ck and Cl. In this paper, we show that the disjoint union graph Cj∪Ck∪Cl is harmonious for odd j+k+l with l ≥j + k + 5.
Energy Flow Management for Hybrid Power System of Fuel Cell Robot
Authors: Chen Qi Hong , Yan Jin Chao
Published: August 2011

The fuel cell robot hybrid power system is a multiple-input and multiple-output nonlinear system. This paper established a model for the system using neural network model, and model predict control strategy was used to control energy split of the system. The simulation results show that the description of neural network has higher precision and good ability of global approximation.
Railway Steel Truss Coefficient of Lateral Force Distribution
Authors: Yang Shi Ruo , Chen Dan Qing
Published: August 2011

This paper illustrates the internal force calculation of the railway steel truss girder under the action of lateral load q by using the finite element method for truss segment. Load q is distributed with partition coefficients a1, a2 respectively on the top and bottom longitudinal bracing in conventional way and calculated as planar articulate. When two forces calculated respectively by using the spatial analysis and planar structure method are equal, lateral force distribution coefficient a1, a2 can be obtained. In the end of this paper we take examples of simple through beam of 48m, 64m, 80m, 144m, 192m, continuous through beam of 2×64m,3×64m, dual continuous deck beam of 2×64m and dual simple through beam of 64m and get the partition coefficient of the floor system plane, 0.77, and the other plane is 0.39.
Research on Parameter Simulation of Pulse Discharge Current in Permanent Magnet Motor Magnetization
Authors: Zhao Zhi Gang , Liu Fu Gui , Wang You Hua , Ren Peng Xiang , Yang Jing , Zhao Lu Zhen , Kan Yu Huai
Published: August 2011

In order to improve the magnetization effect of permanent magnet motor, it is requires accurate and efficient magnetization circuit except that we choose the permanent magnet with high coercive force. The method of pulse discharging for permanent magnet motor magnetization is simple, fast speed and the magnetization effect is good. The parameter selection of pulse circuits influences the magnetization effect directly. The pulse circuit parameters were simulated through parameter scanning method, using Pspice simulation software. Appropriate circuit parameters were obtained through comparing the pulse discharge current waveform, which will ensure the best magnetization effect of the permanent magnetic motor.
Experimental Research on High Intensity Magnetic Separation - Reverse Flotation of a Low-Grade Specularite Ore
Authors: Wang Wei Zhi , Zhang Jin Rui , Yang Chun Guang
Published: August 2011

An iron ore contains specularite and hematite which are its main iron minerals and carbonates such as calcite which are its main gangue minerals. The ore is very apt to produce slime in the grinding process，leading to a deteriorated beneficiability. The rough iron concentrate can be obtained by using high gradient magnetic separator to discard tailings with the grinding fineness of 95% -0.074mm. Then the rough concentrate is treated by reverse flotation to produce a final concentrate with the operation recovery of 66.49% and the iron grade of 66.12%,and the total recovery of iron could reach58.70%.
The Application of Safety Evaluation in Coal Mine Heading Face Based on Fuzzy-AHP Comprehensive Evaluation Method
Authors: Liu Lian Sheng , Zhang Guang Quan , Wu Hui
Published: August 2011

For the safety of coal production, established safety evaluation model of heading face in coal mine. The evaluation indexes were given by analyzing the need for safety in heading face, the evaluation model was set based on Fuzzy-AHP comprehensive evaluation method, and completed the comprehensive evaluation by using membership. The results showed that Fuzzy-AHP comprehensive evaluation was an effective method which can not only solve complexity and multi-level of the index, but also made the evaluation more accurate, which had theoretical and practical value.
Experiment and Simulation of Eddy-Current Loss inside Copper Shielding of Transformers under DC Biasing Condition
Authors: Zhao Zhi Gang , Liu Fu Gui , Wang You Hua , Ren Peng Xiang , Kan Yu Huai
Published: August 2011

With the advent of power electronic technology, the excitation conditions applied to transformers, motors, etc. could be very atypical. DC bias excitation is an undesired working condition of AC power transformers, the asymmetrical saturation of the transformer core, the heavy noise, the serious vibration, and the local loss concentration can all potentially occurred in dc-biased transformers. The effect of the exciting current under different dc-biased magnetization on eddy-current loss in copper plate based on a reduced engineering-oriented benchmark model (TEAM Problem 21) is investigated. Experiment scheme for dc biasing is presented and the distribution of the eddy current loss under different dc-biased excitation conditions was studied in detail. The engineering applicability of three dimensional eddy current analysis methods for dc-biased magnetization field computation and the practical loss modeling are examined, which has been demonstrated via the numerical modeling results and the measured data.
A Friction Damper with Continuously Variable Post-Sliding Stiffness
Authors: Wang Tao , Chen Xi , Teng Rui
Published: August 2011

Proposed in this study is a type of friction damper characterized a continuously variable post-sliding stiffness, which provides an increasing post-sliding force with the accretion of the deformation. It is possible to adjust the output force according to the performance targets at different earthquake levels, thus enlightening a practical approach to the explicit structure control to satisfy all of the required performance objectives. The proposed damper consists of a piston, a rubber layer, friction plates and the jacket. The friction plates and the inside of the jacket constitute the contact pair, or the sliding surface. The friction plates are fixed on the piston through the rubber layer which provides the normal pressure on the sliding surface. The radius of sliding surface varies continuously along the axis of the jacket. Both analyses and experiments reveal that the parabola shape of sliding surface would introduce a cubic force-displacement relationship, thus being helpful to prevent a structure from collapse.
Effect of Annealing Temperature on the Optical and Structural Properties of Ge Doped ZnO Films
Authors: Fan Dong Hua , Huang Kai Zhen , Huang Yu Bao
Published: August 2011

Ge doped ZnO films were synthesized on silicon substrate via RF magnetron co-sputtering methods. The effects of annealing temperature on the optical and structural properties of the Ge doped ZnO films were investigated by means of photoluminescence spectra, X-ray diffraction, and X-ray Photoelectron Spectroscopy. The ultra-violet emission should be related with the free-exciton recombination, and blue and yellow emissions should be attributed to the defect state caused by Ge. The varieties of annealing temperature affect greatly the optical properties. The high annealing temperature leads to the oxidation of Ge and the formation of Zn2GeO4, which could lead to the change of PL spectra.
The Method to Unfold Integral Skin-Panel Based on CATIA
Authors: Gan Zhong , Tan Hai Bing
Published: August 2011

This paper will discuss the unfolding of skin-panel by using the software CATIA. During the process the characteristics of integral skin-panel and the development of its unfolding were presented. Consequently, it could be seen that the structural surface of the external form could be extracted for curved surface. So the unfolding of skin-panel was able to be simplified to the unfolding of the curved surface. Main steps of unfolding the integral skin-panel in CATIA V5 software environment are stated in following parts. The measurement results of the lightening groove located in larger deformation region between surface to be unfolded and unfolded surface are compared in fig 10. And it shows that the method used in this paper meets the demand of precision and is available.
Research of Dynamic Temperature Field of Spur Gear Based on ANSYS
Authors: Ri Chol Nam , Yuan Hui Qun
Published: August 2011

In this paper, through generally using basic priniciple of heat transfer and gear, established the transient conduction differential equation and its definite conditions. On the basis of tribology and engagement theory, established the periodical boundary condition. Using ANSYS Programm, we analyzed temperature distribution of a spur gear operating under transient friction heat, and its periodical change. Simultaneously, we get the flash temperature distribution on the engaged surface of spur gear and its change curves. The basis for precisely studying its thermal deformation and profile modification is also established.
Number Study of the Formation Process of Shaped Charge Metal Jet for Quarry Mining
Authors: Liu Zhi Qiang , Wang Xiao
Published: August 2011

The shock wave and quasi-static state gas that were created by tradition block holing would influence the wall-rock and damage it in quarrying and cutting. For the purpose of the cutting level off and the scatheless wall-rock, the shaped charge was used for the inner cutting and quarrying in the paper. The simulation of the whole course of shaped change metal jet was performed by the ANSYS AUTODYN. The simulation shows: the top and bottom of the metal liner were collapsed slowly; the collapse velocity of the middle of liner was quicker, and a velocity gradient was formed, the focal point was the maximum velocity point. It could be concluded that the study could be used in the engineering design for stone inner cutting and the calculation of penetration parameters.
Numerical Simulation for the Interaction of the Semi-Fixed Abrasive Plate with the Workpiece
Authors: Zhang Ying , Zhou Zhao Zhong , Yuan Ju Long , Lu Chong Da
Published: August 2011

In order to improve the efficiency of ultra-precision processing, the semi-fixed abrasive plate (SFAP) is developed to reduce or eliminate the surface and subsurface defects and improve the process efficiency. The interaction of the semi-fixed abrasive plate-workpiece is the key factor for the processing. The complex plate-workpiece interaction is taken into consideration in the generation of the semi-fixed abrasive surface in this paper. A numerical model which allows describing the elastic-plastic contact load of the isotropic fractal surface and the real contact area of plate-workpiece is developed for the semi-fixed abrasive plate. The results shows that the real contact area is only a part of the workpiece and it changed with the contact load alteration, it is useful to determine the processing parameter of SFAP lapping.
Kinematics Analysis of the Greenhouse Robot
Authors: Liu Jun , Wang Sheng , Wang Xiao Lei , Ma Wen Kui
Published: August 2011

The greenhouse robots are regard as the research object, the essential conception and classification of the robots as well as the developing state of the research in foreign and in domestic are presented. The kinematic equation and the calculation mold of locus are established according to the kinematic analysis, motion designation, dynamic analysis and the analysis of motion mold, which make the function of automatically avoiding obstacles work.
Static and Dynamic Characteristic of Cutting Force when High-Efficiency Cutting Ti-6Al-4V
Authors: Fan Yi Hang , Zheng Min Li , Zhang De Qing , Yang Shu Cai , Cheng Ming Ming
Published: August 2011

Experiment of cylindrical dry turning Ti6Al4V has been carried out employing coated and uncoated carbide tools to determine the characteristic of cutting force. Force signals have been extracted in the turning processes. The static component value of cutting force has been calculated and fractal behavior of cutting force has been studied by calculating fractal dimension. The results of studies indicate that radial force of static component is higher than the other forces. The static values of cutting force involving T2 (composite coating with TiAlN and AlCrN) and T3 (uncoated carbide) are less than T1 (composite coating with TiCN and Al2O3). The change of static value of cutting force using T2 with increase of cutting speed is smaller than the other tools. Fractal dimension can be used as the characteristic of the randomness of dynamic component of cutting force and reflect stability of cutting process. The fractal dimension of dynamic component of cutting force of T1 is the smallest, followed by the T3, and that of T2 is highest. Considering the static and dynamic characteristic of cutting force, T3 (uncoated carbide tool) is more suitable for high-efficiency cutting Ti6Al4V.
What are Virtual Enterprises Virtualize
Authors: Huang Dong Xin , Zhu Shou Xin
Published: August 2011

Virtual enterprise (VE) is considered as the organization form of agile manufacturing, but what are virtual enterprises virtualize? There is little literature related to this issue. Based on “problem driven” instead of “concept driven”, representative literatures, definitions and cases of VE will be analyzed in this paper. Then based on these different problems and three kind of organizational theories proposed by Santos and Eisenhardt, this paper will classify virtualizing as function virtualizing, form virtualizing and resource virtualizing to characterize different problems that different definitions of VE proposed to solve.
Quantitative Analysis of Primary Phase Morphology in Semi-Solid Alloys Based on LabVIEW and IMAQ Vision
Authors: Wang Bin , Wei Yong Bin , Chen Jing De
Published: August 2011

This paper researched on metallographic image analysis of primary phase morphology in semi-solid alloys. The image processing and quantitative analysis system is based on labVIEW and IMAQ Vision. The system uses image processing and analysis technology, such as manual threshold, removing small particles and filling holes processing, edge detection and quantitative analysis of the volume fraction, size and shape of the primary solid. According to the testing results, this system has characteristics of less time-consuming, quick inspection speed and high measurement accuracy, which completely satisfies the requirements.
The Formation of Virtual Enterprise: A Resource Based Perspective
Authors: Huang Dong Xin , Zhu Shou Xin
Published: August 2011

Virtual enterprise (VE), like strategic alliance, outsourcing and supply chain, focus on inter-organizational cooperation. But, how can we identify and differentiate it from them? Goldman and Preiss gave the six strategic reasons for the formation of VE. However, the six strategic reasons are not exclusive for VE, and which is lack of reasoning based on strategic management theory. Our purposes are: 1, reasoning the formation of VE based on resource based theory; 2, identifying VE and differentiating it from strategic alliance, outsourcing.
Study on Urban Expressway Lane Mark Detection in Special Conditions
Authors: He Xin Sheng , Wang Shi Shi , Cai Zhi Yong , Wang Dong Yun
Published: August 2011

Detection algorithm of lane line under the special condition is based on focal and difficult point of lane line departure warning system of computer vision. This article firstly deals with the image compression and grayscale, establishes reasonable region of interest, and remove the non-road information in the image; Then we proceed the probabilistic and statistical computing for the image pixels, draw the gray level histogram. By analyzing the dynamic gray level histogram, we identify the lane line and grey value of the road and automatically calculate the reasonable threshold to binarizate then denoise the images. Last we label the images to reach the goal of identification of lane line and establishment the space between lane line and vehicles. The test results show that: the algorithm mentioned in this paper can not only detect the lane line accurately in real time, but also it enjoys a wide range of applicability to provide reference for improvement of lane line departure warning system.
Design Method of Turbine Fir–Tree Blade Root Tenon Slot Broach
Authors: Wang Bin , Wang Na Jun , Sun Sheng Li , Zhu De Qiang
Published: August 2011

This paper studied the key issues of the broach structure design of turbine fir-tree blade root tenon slot, based on the analysis technical requirements of groove surface and the total margin. According to the principles of rough broach efficient, high precision broach qualitative to determine broaching method and broaching margin distribution. It proposed broaching methods of surface processing, broaching margin distribution and geometric parameters.
Fatigue Source Analysis of Dynamic Mold Temperature Injection Mold for Large Plastic Parts
Authors: Li Xi Ping , Gong Ning Ning
Published: August 2011

Dynamic mold temperature (DMT) injection molding is a molding process that the mold cavity is first rapidly heated to a high temperature before plastic melt injection, and then cooled quickly after filling and packing stages. With this technique, plastic parts with very good surface performance can be produced. However, as the special mold structure and its worse working process, large stress concentration can be caused in the mold. Consequently, the mold for this new injection technology can be easily fatigue and the lifetime of the mold is inevitably decreased. In this paper, the structure of the mold was presented first, and then the working process and factors influencing the lifetime of the mold were analyzed. Through numerical simulation, the fatigue source of the mold was evaluated. Results showed that the evaluation process presented in this paper was very in accordance with the practical failure mold.
Design of Blocking Software Based on DSPF2812 Servo Control System
Authors: Gao Xin Ye , Li Zhi Qing , Fan Da Peng
Published: August 2011

Based on the servo system of an Opto-Electronic Stabilized Platform, the idea of blocking software were developed and the process of the design was introduced detailedly by analying the framework and functional requirements of the systerm . At last,the software was finished according to the idea of blocking software.the function and dependability was tested on the state of XDS510 USB2.0 DSP emulator. The test indicated that the design of blocking software improved the dependability of the system, shorted the period of the software empolder .the software was provided with well expansibility, maintenance ability, naturalization ability, cutting ability,mensurability and excellent guidance for the similar system.