bluuebunny/crossref_metadata_2025 huggingface dataset:
An Improved Method of Artificial Bee Colony Algorithm
Authors: Wu Xin Jie , Hao Duo , Xu Chao
Published: September 2011

The basic artificial bee colony algorithm gets local extremum easily and converges slowly in optimization problems of the multi-object function. In order to enhance the global search ability of basic artificial bee colony algorithm, an improved method of artificial bee colony algorithm is proposed in this paper. The basic idea of this method is as follows: On the basis of traditional artificial bee colony algorithm, the solution vectors that found by each bee colony are recombined after each iteration, then the solution vectors of combinations are evaluated again, thus the best result is found in this iteration. In this way the possibility of sticking at local extremum is reduced. Finally the simulation experiment has been finished. The simulation experiment results have shown that the method proposed in this paper is feasible and effective, it is better than basic artificial bee colony algorithm in the global search ability.
Surrogate-Assisted Evolutionary Optimizers for Multiobjective Design of a Torque Arm Structure
Authors: Pholdee Nantiwat , Bureerat Sujin
Published: September 2011

This paper presents two surrogate-assisted optimization strategies for structural constrained multiobjective optimization. The optimization strategies are based on hybridization of multiobjective population-based incremental learning (MOPBIL) and radial-basis function (RBF) interpolation. The first strategy uses MOPBIL for generating training points while the second strategy uses a Latin hypercube sampling (LHS) technique. The design case study is the shape and sizing design of a torque arm structure. A design problem is set to minimize structural mass and displacement while constraints include stresses due to three different load cases. Structural analysis is carried out by means of a finite element approach. The design problem is then tackled by the proposed surrogate-assisted design strategies. Numerical results show that the use of MOPBIL for generating training points is superior to the use of LHS based on a hypervolume indicator and root mean square error (RMSE).
Nonlinear Finite Element Analysis of Corroded Reinforced Concrete Lock-Walls
Authors: Qu Fu Lai , Zhao Shun Bo , Zhou Zhi Mei , Yuan Baoan
Published: September 2011

Reinforcement and concrete can work together to bear load in reinforced concrete structures, one of the main reasons is the relatively prefect bond between reinforcement and concrete. When steel reinforcement corrodes, the bond strength decreases and leads to the degradation of the reinforced concrete members. This paper built a finite element model by selecting appropriate stress-strain relationship of concrete and reinforcement, bond-slip relationship between concrete and corroded steel bars. The flexural behavior of corroded reinforced concrete lock-walls was analyzed by nonlinear finite element method. The calculated results were compared with the test results to verify the reliability of the finite element model. Finally, the influence of corrosion level of steel reinforcement and concrete strength on the normal section bearing capacity of lock-walls were discussed.
A Model of CMP about Magnetic Fluid and its Numerical Simulations
Authors: Li Yong Zhou , Fan Xiao Ping , Zheng Qiu Yun
Published: September 2011

Chemical mechanical polishing (CMP) is one of the most effective technologies in modern ultra-precision processing. In this paper, we consider the slurry is ferromagnetic fluid and the influence of the centrifugal force, and then obtain the equations about this slurry in CMP. The slurry pressure distribution, resultant forces and moments acting on the wafer are calculated in typical conditions, and the affects of film thickness, roll and pitch angles are also calculated.
Design of Service Network of Huachuan Denso Co.
Authors: Li Qing Song , Qin Li Zhi , Yang Wei , Wang Yong Hui
Published: September 2011

Location decision of Service Networks is important for an enterprise to dominate market and to improve service level. Characteristics and the decentralized control strategies of service network were discussed for the enterprise of Denso class. A 0-1 mixed integer programming model was established for location problem of spare parts centers and solved by ILOG along with sensitivity analysis. Furthermore, a dynamic programming model was established for location problem of sales model shop and calculated by a numerical listing method.
Simultaneous Optimization of Smart Beam Structure for Vibration Control Based on Chaos Particle Swarm Algorithm
Authors: Ma Tian Bing , Du Fei
Published: September 2011

A chaos particle swarm algorithm has been used to search for the optimal placement and size of the piezoelectric sensors and actuators (S/As) bonded on smart beams as well as the optimal feedback control gains. The criterion based on the minimization of stored and needed control energy was adopted for the optimization of the control system. The optimal distributions of the piezoelectric patches and feedback control gains based on specific controlled vibration modes have also been put forward. The results showed that the control effect could be significantly improved with optimized distribution of piezoelectric patches and gains.
Experiment and Simulation on Natural Frequency of Fiber-Paper Honeycomb Sandwich Structure Composites
Authors: Yang Xiao Jun , Lan Qing Shan , Zhong Yu Ning
Published: September 2011

The theory of natural frequencies were acquired from vibration experiment, meanwhile, the first order frequencies of honeycomb sandwich structure composites were obtained by using the sandwich laminboard theory and equivalent panel theory via the finite element software ANSYS. The simulation results were compared to the experiment results to get the error of calculation of the two different equivalent methods, thereby we can select more appropriate equivalent method to ensure the veracity of the result analysis and provide a reference for the optimization design of the fiber-paper honeycomb sandwich structure composites.
Finite Element Analysis of Hammer of the Top Drive System of the JDD-100 Drilling Rig Based on ANSYS
Authors: Yu Ping , Wang Yao Hua , Xiao Zhi Hui , Liu Dong Yu
Published: September 2011

Hammer is an important part of the top drive system. ANSYS software was applied to analyze the top drive system drilling rig hammer. The procedures and methods were introduced in this paper. A reliable reference for optimizing the design and improving the structure is provided. Through calculation, whether the design of top drive system is sufficient to actual requirement can be judged. The changes of strain and stress in hammer are qualified to the top drive system.
Design and Optimization of Packaging Cushion Foams for Liquid Crystal Display
Authors: Li Xing Zhou , Zhang Guo Qiang , Zhai Ji Qiang , Wang Wen Juan
Published: September 2011

The compression simulation of LCD package indicates some potential design problems. Under large compression force the package will slope due to asymmetric deformation. The 3-D whole package parametric model was built in Pro/Engineer. Compression process simulation of package in Ansys will find design defects. Based on the simulation results, Ansys Design Exploration module generates the optimization design in accordance with the response surface analysis result. The compression simulation was performed to identify the reliability of the new design. In addition, some guidance on the cushion packaging parametric design and optimization was put forward.
Study on the Fuzzy-PID Policy for Force Control in Free-Form Surfaces Polishing by Robots
Authors: Su Xiao Ling , Zhan Jian Ming
Published: September 2011

When a robot is used to polish or finish a curved surface, both feed movement and contact force have to be controlled at the same time so that the polishing tool would machine its work-piece at the right position in right posture with required force. In this paper, a passive wrist system is developed to adapt the shape of the machining curved surface by changing its posture along with the surface. And under the Fuzzy-PID policy, polishing force is controlled at a stable value in the normal direction of the named machining point while the polishing tool moving along the curved surface by multi-point machining. It means that the passive wrist system and the model of the surroundings could be used in force controlling when robots polish free-form surfaces with multi-point machining by a grinding ring.
The Experiment of Trajectory Tracking Control of Joint Manipulator with PC-Based
Authors: Zhang Mei Qin , Feng Wu , Zhang Hui Di , Wang Xian Chen
Published: September 2011

For the disadvantages of the poor open and high price of the special joint robot control system, a general PC-based three degree articulated robot control system is proposed. After modeling kinematics of the robot, the kinematics trajectory is planned and the trajectory algorithm is designed in a given error condition. Finally, the control program is done with VB, and it is verified by an example.
Applying TRIZ Principles in Inventive Design of Tensioning Device
Authors: Zhang Hui Di , Song De Yi , Shen Meng Hong
Published: September 2011

The ability to solve inventive problems is the core of the innovation process. TRIZ have shown results that inventiveness can be understood and developed systematically. Considering the deviation accident of belt conveyor is frequently taken place, so this paper presents a strategy based on TRIZ principles to inventive design of tensioning device for enhancing deviation problem solving for belt conveyor. The useful and potential solutions are induced by using TRIZ principles. The results show that TRIZ is a useful tool which helps in solving problems by eliminating contradictions.
Fatigue Strength Simulation of Boom System Structure of Pump Truck
Authors: Wang Bin Hua , Lu Peng Min , Shao Yu Hong
Published: September 2011

The motion equation of boom system of pump truck carrying concrete flow is set up based on the coupled vibration theory of cantilevered pipe and the finite element theory. Dynamic stress history of boom system with parameters of dip angle α=0°is simulated combining MATLAB simulation analyses with ANSYS finite element model. The feasibility of this method is verified through field experiment. Stress histories are simulated by adjusting parameter of dip angle as follows: α=20°,52°and 80°.Great stress points are painted on the Goodman Fatigue Limit Diagram measured by experiment. And then fatigue strength assessment of boom system is done. The research method can be used for the design calculation of similar products.
Genetic Algorithm Based Multidisciplinary Design Optimization of MEMS Accelerometer
Authors: Liu Yu , Yang Hong Yun , Wang Guo Chao
Published: September 2011

Multidisciplinary design optimization of a biaxial capacitive micro-accelerometer with the crab-leg flexural suspension is discussed. Considering the influence of microstructure design, fabrication process and detection circuit, as well as the constraints of fabrication limitations, damp design and adhesion factor, a multidisciplinary optimization model is developed by global criterion method. Furthermore, genetic algorithm is applied to obtain the multi-objective optimum of the proposed multidisciplinary design model.
Simulation of Pressing Effect of Press Wheel with Different Rims by Discrete Element Method
Authors: Wang Fu Lan , Jia Hong Lei , Liu Dan Dan
Published: September 2011

Pressing is an important part of precision seeding operation, which has an important effect on crushing soil. In order to enhancing the effect of soil crushing, some press wheels with flange rim are used. But further research is needed to evaluate whether the use of these press wheels affect the actual seeding depth that will affect precision seeding quality. Three kinds of press wheels, with the smooth rim, circular flange rim and rib rim respectively were designed, and the PFC3D discrete element method (DEM) software was used to simulate the pressing processes of these press wheels, and the contact force between the rim and soil, soil displacement and porosity were analyzed. It was concluded that the press wheel with the smooth rim is better than others in precision seeding operation.
Simulation Research on Steering Electromotor Control for Electric Pallet Truck Based on Fuzzy Adaptive PID
Authors: Shu Li Sheng , Li Guo Ping
Published: September 2011

According to the mathematical model of brushless DC motor (BLDCM), control equations of BLDCM speed control system and simulation model were established for steering control device in electric pallet truck based on transfer function in Matlab/Simulink. The fuzzy adaptive PID control method was introduced to speed control system, and it can realize PID parameter’s online adjustment. Simulation result shows that the designed speed controller based on fuzzy adaptive PID has better dynamic and static performance than the controller based on traditional PID, and the control accuracy is also greatly improved.
Influence Analysis for the Controllable Growth of Carbon Nanotubes with CCVD Method
Authors: Sun Zhen Feng , Qi Le Hua , Shu Yang
Published: September 2011

To control the length and morphology of carbon nanotubes(CNTs) is difficult in its producing process. Influencing factors of length and morphology of carbon nanotubes have been analyzed in the catalytic chemical vapor deposition (CCVD) process. According to the growth characteristic of carbon nanotubes, the diffusion model was developed. Over time, the diffusion potential decreases due to a reduction in the carbon atom concentration gradient. With the model, the shape of catalytic particle is analyzed. From theoretical derivation, it is demonstrated that with the temperature ranging from 1173K to1373K, the growth rate raises up sharply with the increasing of temperature. Growth rate of CNTs increases with increasing layers at the same temperature.
Improved Mu Method with Mixed Perturbation to Dynamic Pressure
Authors: Gu Ying Song , Yang Zhi Chun
Published: September 2011

Mu method is a flutter solution technique based on frequency domain mu-analysis, which directly applies perturbation to dynamic pressure in aeroelastic equation of motion. In a previous study, the dynamic pressure perturbation was modeled as a purely real uncertainty, which could not guarantee the continuity of mu. To improve the continuity of mu, a small amount of complex perturbation is added to the dynamic pressure in addition to the real perturbation. Thus the mu method is improved with this mixed real/complex perturbation. Formulations and algorithm of the improved method are presented and validated with sample test cases. It is demonstrated that the improved mu method is more feasible and conservative than the original mu method due to the mixed perturbation.
Study on the Method of Expressing the Pitch Curve of Non-Circular Gear Based on NURBS Curve
Authors: Zhao Xiong , Chen Jian Neng , Ren Gen Yong , Wang Ying , Li Chuan Long
Published: September 2011

In order to express the pitch curve of non-circular gear conveniently in a uniform way, which would lessen the complexity of calculating the tooth profile of non-circular gear, the authors propose a curve fitting method of NURBS curve with the least data points based on the fitting of NURBS curve. This method is used to express the pitch curve of non-circular gear, and the specific solution model and detailed calculation procedure are presented. In addition, a method to select data points inhomogeneously and appropriately using non-uniform factor of selecting points is proposed. Two design examples are introduced to testify the validity of this expression method.
The Application of Tool Radius Compensation in NC Processing
Authors: Huang Xiao Bing
Published: September 2011

The functions of the tool radius compensation in the NC processing are discussed. The functions mainly include: simplifying programming; fitting the changes of the tool; simplifying the finish machining; controlling the accuracy of the contour; machining the parting surface coupled with the concave and the convex. Some notices that must be observed strictly are also discussed.
Nondestructive Testing and Static/Dynamic Loading Detection of Old Slab for Bridge Widening
Authors: Zhao Shun Bo , Chen Ji Hao , Yu Xiong Huai , Chen Cheng , Chen Song
Published: September 2011

Combined with a freeway widening project, an old bridge composed by simply supported prestressed concrete hollow slabs in 20m span was detected in-site for deciding whether it can be further used, which was designed according to the former design code. The maximum test load was calculated under the worst load combination at service stage according to the current design code. The inspection of the bridge was conducted by nondestructive testing methods for strength and carbonation of concrete, concrete cover and corrosion of prestressed strands. The service behaviors such as crack and mid-span deflection of a slab were measured by static loading test. The entirety of the bridge was detected by dynamic loading test. The results show that the strength of concrete and the concrete cover of prestressed strands meet with the design requirement, the carbonation of concrete and corrosion of prestressed strands is insignificant, the bridge is in good service performance, and the slab has enough flexural stiffness to prevent larger deflection.
Measurement of Work Piece Surface Quality Based on Digital Image Processing
Authors: Wu Cheng Yu , Wu Fei Qing , Yang Hui Mei
Published: September 2011

This article discusses how to apply sensor mixture, modern image handle and computer vision technology to analyse and to deal with the feature messages of the ground work piece surface flaw, and computer how to apply the filtered feature messages to identify these flaws. Result shows that this system can find the defect work piece real time from the images for testing.
General Mathematical Model of Internal Meshing Spiral Bevel Gears for Nutation Drive
Authors: Lin Zheng , Yao Li Gang
Published: September 2011

The general mathematical model of internal meshing spiral bevel gears for nutation drive is studied. Based on conventional enveloping theory and transmission principle, the meshing of two spiral bevel gears in nutation drive was substituted by the meshing of an imaginary rotating crown gear engaging with the external and internal bevel gear respectively. The general mathematical model of crown gear was established. Then the general mathematical model of internal meshing spiral bevel gears is obtained by matrix transformation, which is suitable for a variety of gear tooth profiles. Finally, the mathematical model and 3D modeling of double circular-arc spiral bevel gears are developed.
Parametric Finite Element Analysis on Key Parts of the Conveyor
Authors: Yang Chun Sheng
Published: September 2011

Belt conveyors are the major equipments for bulk material transportation.This paper analyses the static and dynamic behaviours of the belt, and establishes the dynamic elastic modulus. By analyzing the characteristics of the Kelvin and Maxwell viscoelastic model, the former is selected as the conveyor belt model as it can more realistically reflect the mechanical characteristics of the conveyor system. This paper introduces the development of the belt conveyor, and analyzes the current research situation at home and abroad.
Order Allocation Model Based on Production Load Equilibrium for Supply Chain with Multi-Manufacturers and Multi-Suppliers
Authors: Song Fa Shuai , Xiang Wei , Ye Fei Fan
Published: September 2011

For industry cluster with multiple suppliers and multiple manufacturers, there exists a network supply-demand relationship among suppliers and manufacturers. By considering the suppliers' current available manufacturing resources, this paper proposes an order allocation model for supply chain with multi-suppliers and multi-manufacturers based on production-load equilibrium strategy. The simulation of an industrial cluster of injection molding parts with three manufacturers and five suppliers is used to verify the effectiveness of the proposed model.
Research on Decision-Making in Reconfigurable Manufacturing System
Authors: Liu Jian , Song Shi Gang , Cai Biao Hua
Published: September 2011

To meet the optimal selection of equipment resources in reconfigurable manufacturing environment, a target system was established to select equipment by considering equipment real time state in equipment selection. To use the existing equipment resources effectively, a resource allocation algorithm was presented to allocate resource by matching process requirements capacity and resources processing capability and taking the real-time state of manufacturing resource into consideration. This method facilitates the equipment decision-making problem, provides an effective way of selecting equipment in the reconfigurable manufacturing system.
Influence from Balance between Capacity and Load on Different Development Phases of Supply Chain
Authors: Tu Jian Fei , Liu Ke
Published: September 2011

During a certain time, balance between the supplier’s production capacity and order load can facilitate the successful conclusion of orders and is a significant guarantee for the supply chain’s positive development. This paper exerts an analysis on the influence form balance between capacity and load on the supply chain during its different phases, and it suggests establishing a stable and efficient supply chain network through properly adjusting the supplier’s load level by the demanding party.
Research on the Business Process Modeling Based on Domain-Specific Modeling Meta-Model Driven
Authors: Chen Lei , Zhan Hong Fei , Yu Jun He , Jiang Zhong Ren , Lei Chen Jian
Published: September 2011

To decrease the difficulty of business process modeling, the domain-specific modeling (DSM) method and the frame of model driven architecture (MDA) were discussed in this paper. By applying DSM and MDA, the meta-model consisting of domain schema and domain template was established to simplify the business process. Then the character property, relationship property and operation of business-process-oriented DSM (BP-DSM) meta-model were described. The meta-model and application template would be consummated by continuous instantiation and abstraction of the domain concepts. By extracting and accumulating a large number of enterprises' templates within the same industry, the industry-oriented model template would be ultimately established.
Laser Bionic Strengthening Local Grid of Mould Surface
Authors: Di Tie Nan , Liu Li Jun , Jia Zhi Xin , Li Ji Qiang , Zhou Hong , Li Xian Yi , Chen Li Qiong
Published: September 2011

For the short life of enterprise hot work die directly caused to problems in the waste of resources and the rising cost of production. Based on studying the biological prototype of crack-resistance of dragonfly wings and finding surface thermal fatigue crack is one of the main factors affecting life of the hot work mould, it is put forward thoughts about the local laser bionic strengthening the grid mould surface. Different from the traditional mould surface integral laser transformation hardening (LTH) technology, by using laser melting simulating dragonfly wings to block localized crack in the partial surface of mold, bionic strengthened die life is improved within 1~1.5 times. Experiment results on die steel shows that it is provided a new method to improve the service life of die casting mold and promoting this technology will bring significant economic benefits for the mold industry.
Shape Rolling Simulation of Tailor Rolled Blanks Based on Deform-3D
Authors: Huang Can , Gan Yi , Du Ji Tao , Chen Cheng Zhan , Chen Qi Jun
Published: September 2011

Tailor rolled blanks (TRB) is made by flexible rolling system. And the thickness of TRB can be determined according to the load of this section. With its good bearing capacity and designed, it can be used to make automotive body for reducing the material and lower the weight. This paper describes the rolling process of TRB, and rolling simulation model of TRB was constructed using Deform-3D. The result curve of TRB rolling simulation was compared with a given target curve to determine the TRB rolling implementation, and had a simple analysis about the factors of each cross section during rolling. This research will give a guidance to realize the rolling of TRB.
Process Data Driven Based Process Equipment Automatic Control Technology
Authors: Li Zhou Yang , Gu Wen Tao , Lei Yan Ni
Published: September 2011

Process equipment is essential for product manufacturing, especially for complex products such as aircraft and rocket. In order to improve the motion precision and automation level of process equipment, a new approach is brought forward. A data driven based process equipment automatic control system is introduced to control process equipment automatically according to process data. Fig. 1 in the full paper gives the system’s architecture. Based on analysis of the relationship among manufacturing processes, process plan information and process equipment, process equipment automatic control oriented information model was established. In order to realize automatic control of process equipment, a process equipment automatic control and management framework was established. The key technologies including motion control and motion detecting are discussed in detail. At last, the technology was applied to the design and manufacturing of a horizontal rocket rivet fixture. The application results show that this technology could remarkably increase the efficiency and accuracy of the manufacturing process.
Industrial Design and Technical Beauty
Authors: Wu Xue Ping
Published: September 2011

Industrial design is not only the exterior design. Industrial design is the scientific and technical results transformation for products, goods. With environmental protection requirement, the core technology, technical innovation and knowledge innovation is the landing. Industrial design always is closely associated with science and technology. Technical and industrial design is innate relates in together. This paper tries to analyze the relation between industrial design requirements and technical beauty.
Study of Polymethyl Methacrylate Laser Transmission Welding
Authors: Wang Zhen , Lei Jian Bo , Wang Yun Shan
Published: September 2011

Laser transmission welding (LTW) is a new technology for joining plastic components, involves a laser beam passing through a laser-transmitting part being absorbed by a laser-absorbing part at the weld interface. To form a strong bond, it is important that the weld interface be exposed to sufﬁcient heat to melt the polymer without degrading it. This paper investigates the quality of PMMA (Polymethyl Methacrylate) laser transmission welding by using YAG (1.06um) laser. Using the orthogonal experiment method, the specimens under different parameters have been studied. In order to evaluate the mechanical resistance of the welded joint, surface proﬁlometry and metallographic microscopy were employed. It was shown that welding quality was significantly influenced by speed, power, and welding spot size. We summarized the influence of various factors, and eventually obtained the experimental results under different experimental parameters.
Study on Milling Technology of Screw Motor Stator’s Inner Helicoid and Calculation Method of Milling Cutter Contour
Authors: Wang Shu Qiang , Wang Ke , Sun Xing Wei , Liu Xi Min
Published: September 2011

Aiming at the slender hole of the screw motor stator which has a large lead and whose cross-section contour composed by convex and concave curve, the article proposed a processing method using finger milling cutter within a continuous inner helicoid and studied the formed theory about the movement of the tool relative to the workpiece. A new method was proposed to calculate the contour of the tool using limited point data of the contour of workpiece and the related software programs was designed. By designing and implementing of computer simulation, the correctness and feasibility of the processing technology are verified.
Impact of Carbon Content in Carbon Steel on Laser Boring
Authors: Chen Dai Min , Li Zhan Guo
Published: September 2011

In this paper, five kinds of carbon steel have been processed with laser boring. By using the dual-factor experimental method without repetition, it has been studied systematically on how boring is influenced by the parameters such as carbon content, laser power and pulse width and so on. The paper analyzed the influence on the dimension, depth and coning, which offers the viable first option of the laser-parameter for millipore.
Polygon-Division Method to Measure Wound Area of Human Body Surface
Authors: Zhang Bi Ming , Fu Guo Hong
Published: September 2011

When human’s body been injured. The value of length and area of wound, rotation angle range of joint are the important references for forensic judge. This paper presents a Polygon-Division method to measure human body surface wound area. This method based on the photo image of wound region and with computer aided. For experiment, I design and implement a software program. The result of experiment reached the demand of precision of forensic judge. The program based this method is more simple to operate and more efficient than other programs, and this is a practical and simple method to measure human body surface wounded area.
Research on LED Lighting Secondary Light Distribution by Using a Freeform Lens
Authors: Hu Zhang Fang , Mao Jian Wei , Luo Yuan
Published: September 2011

Application of semiconductor lighting is widespread, so its secondary light distribution design of the LED for lighting plays an important role. For LED road lighting applications, its uniformity of illumination need to meet certain requirements, a freeform surface using freeform optical lens was designed, in the secondary light distribution. Because of the application of freeform lens, LED lighting illumination uniformity has been improved. Lighting simulation and analysis, results indicate that based on freeform lens, LED lighting has good illumination uniformity, and has well research, development and application prospects.
Visual Detection of Moving Vehicles Ahead Based on the Characteristics
Authors: Yu Hou Yun , Zhang Wei Gong
Published: September 2011

Machine vision perception technology is widely used in the vehicle’s active safety system. It provides more immediate and correct information of road and vehicles around, in which inspection of moving vehicle ahead is one of the important items. A method of inspection fused of detection of the shadow under the vehicle and symmetry of the vehicle’s tail is presented in this paper. At first, a region of interest is selected according to the lane lines. Then, the shadow can be detected with grayscale histogram in the region of interest and a suspected area of vehicle is obtained by expanding the shadow with empirical proportion. At last, the vehicle ahead is further affirmed by calculating the symmetry of such characteristic at its tail as grayscale value, taillight and the edges. Experimental results prove that this method can well solve the actual problems of vehicle detection.
The Research Based on Empirical Mode Decomposition in Bearing Fault Diagnosis
Authors: Xu Tong Le , Lang Xue Zheng , Zhang Xin Yi , Pei Xin Cai
Published: September 2011

Comparing with many modern signal processing methods in the bearing fault diagnosis, Hilbert-Huang transform is proposed which has good resolving power, and is adapt to process non-stationary, nonlinear and no cross-interference signals. Experimental bearing vibration signals have been analyzed by using this method, whose impulse response waveform was effectively separated from the signals. The results show that the sensitivity and reliability of the method are satisfactory.
Study on a Micro-Force Generated Mechanism for Sensor Calibration
Authors: Wang Yong , Sun Jing Hui , Liu Zheng Shi , Liu Huan Jin
Published: September 2011

The current method of micro-force generated for sensor calibration is scarcity and complexity. In the paper we propose a mechanism based on flexible hinges for micro-force, illustrate its working principle and establish the mechanical model. By theoretical analysis the analytical expression of the force reduction multiplier is derived. After initializing some parameters, the result shows that this mechanism can produce the large range and high resolution force of µN. The force can be applied in calibration of micro-force sensor.
Design and Implementation of Software System for Large-Scale Coordinate Measurement Based on the Laser Tracker
Authors: Zhang Zi Li , Yuan Jiang , Zhou Wei Hu , Wang Ya Wei , Xu Yan
Published: September 2011

The laser tracking system is widely used in the large-scale measurement field in industry providing accurate spatial information of measured objects. In this paper, the frame of software system for the laser tracker is introduced, as well as the design and implementation of each module. With the help of the software, customers can attain high precision measuring results within large volume. Functions of information communication, command control, error calibration and compensation, geometric element analysis and display can also be realized. The software system is divided into six modules, including the interconnect communication and on-line control module, error calibration and compensation module, data analysis module, database management module, 3D display of geometrical elements and man-machine interface. The design and construction of each module is described in detail which can help customers realize different functions throughout the measuring process.
Nano-Displacement Measurement with Grating Interference
Authors: Jiang Min Lan , Li Fu Peng , Wang Xiao Dong
Published: September 2011

Nano-Grating measurement technology has been made great development in our country, for its unique advantage which isn’t available in laser interferometer. This paper presents a Nano-grating interferometer displacement measuring system based on double diffraction grating and Semiconductor laser light source, analyzes the error origin of the system in detail and uses error correction and compensation method to improve the measurement accuracy. The experimental result indicated that the system does have stable interferometer, high signal contrast, and easy adjusted optical path, further more the system with a strong environmental adaptability and compact structure. Under 20mm range and 50mm/sec measurement speed, the system’s measuring repeatability is below 30nm.
Research and Simulation of Robot Trajectory Planning in Joint Space
Authors: Hu Xiao Ping , Zuo Fu Yong
Published: September 2011

Studying methods of robot trajectory planning which based on polynomial and trapezoidal velocity profile in joint space. The trajectory of one joint robot and joints robot is simulated by MATLAB. The simulation results shows that it satisfies restraint conditions of robot position velocity and acceleration in motion, it guaranteed smooth and continuity.
The Design of Automatic Smooth Layer System for the Construction Elevator Based on Fuzzy Control
Authors: Zhu Jun Jie , Ma Lin , Chen Cheng , Feng Xu
Published: September 2011

This In the construction elevator with high-speed inverter based on the single-chip microcomputer and single speed sensor, the response of the automatic smooth layer system is often too slow to guarantee the accurate leveling lift, so the system needs frequent calibration. This paper presents a fuzzy algorithm based elevator automatic leveling system using STC controller. Test results show that, under the condition that the load vary frequently and hoist cage fall inertia, the system can predict elevator weight-bearing state or delay in advance to control the inverter.template explains and demonstrates how to prepare your camera-ready paper forTrans Tech Publications. The best is to read these instructions and follow the outline of this text. Please make the page settings of your word processor to A4 format (21 x 29,7 cm or 8 x 11 inches); with the margins: bottom 1.5 cm (0.59 in) and top 2.5 cm (0.98 in), right/left margins must be 2 cm (0.78 in). We shall be able to publish your paper in electronic form on our web page http://www.scientific.net, if the paper format and the margins are correct. Your manuscript will be reduced by approximately 20% by the publisher. Please keep this in mind when designing your figures and tables etc.
Tribological Performance of Pulse Electroplated Ni-P/BN(h) Composite Coatings
Authors: Peng Cheng Zhang , Zhu Ling Ling , Tang Si Wen
Published: September 2011

The Ni-P/ BN(h) composite coatings were prepared by pulse electroplating. The friction and wear properties of the composite coatings were investigated by using friction and wear tester under dry sliding condition, the worn surfaces morphology of the composite coatings were observed by scanning electron microscope (SEM).The results show that the wear rate and friction coefficient of the composite coating against 45 steel decrease with the increase of BN(h) content in plating bath, the wear mechanism is mild abrasion.
Assessing Desertification with Soil Indicators in Agro-Pastoral Transition Zone of Northern Shaanxi
Authors: Zhang Jing , Hou Pei
Published: September 2011

Desertification assessment is an instrumental component in developing global regional actions plans which aim at preventing and remedying desertification, a global and regional environmental problem. This research integrated selected soil parameters (physical properties, chemical properties) with plant canopy and used principal components analysis (PCA) and regression analysis to assess the severity of desertification risk. The northern part of Shaanxi province in China was taken as a case study and soils carrying different plant canopy were sampled in the 0-20 cm layer. Two soil indicators were selected from 17 basic soil physicochemical indexes. They were 0.25-0.05 mm soil sand content and soil organic matter content. An evaluation system was established by using these indicators, to assess the desertification extent by the content of 0.25-0.05 mm sand and soil organic matter at the 0-20 cm layer. The system developed may be used to assess the desertification process and distinguish the areas sensitive to desertification in the study region and in regions with similar characteristics.
An Improved Method for Estimating the Seismic Intensity Based on Grey System Theory
Authors: Tong Jie , Fu Ji Hua , Wang Zhong Yu
Published: September 2011

When a big earthquake happens, the reliable estimation of the earthquake damage within a short time is very important for the government to allocate the rescue personnel and supplies. A new method to estimate the seismic intensity rapidly based on the grey system theory is proposed in this paper. The seismic intensity is closely related to the ground motion parameters, which indicates it can be obtained simultaneously by knowing the ground motion parameters. Through the preliminary theory and experiment analysis, the method could be used to estimate the seismic intensity accurately with less calculation and strong real time characteristics.
Simulation and Application on the Adaptive Fuzzy PI Control in Low-Rise Elevator Speed Regulation System
Authors: Deng Jing Xin , Guo Xiao Ding , Chen Xiao Ke , Cheng Zheng Mei
Published: September 2011

The elevator has become an important vertical transport tool, its control effect of speed regulation attracted much attention. The structure of control system about low-level elevator was introduced. For starting and braking frequently and the load changes greatly, the traditional PI control strategy is difficult to achieve the desired control effect of the elevator. The fuzzy inference rule table was established which based on fuzzy control theory. The adaptive fuzzy PI controller was designed. The simulation research and application using the adaptive fuzzy PI control strategy in brushless DC motor systems was performed. The proposed method was validated through simulation control experiments and application that the adaptive fuzzy PI can satisfy the elevator high-performance speed requirements and have very good using value.
The Corresponding Theory Study of Dike Typical Diseases and Electrolog Data
Authors: Zhang Qing Ming , Xu Shuai , Leng Yuan Bao
Published: September 2011

Dike is an important component of Yellow River flood control system, but its security situation is not optimistic. High-density electrical method is an effective mean of dike typical diseases detection, we establish theoretical model to analyze the detection resolution effects of depth and scale changes of dike typical diseases on different detection devices of high-density electrical method, establish the correspondence of dike typical diseases and electrolog data.
Development of Non-Contact Type Chewing Sensor Using Photo-Reflector
Authors: Kitazono Yuhki , Ono Shoichi , Nakashima Shota , Miyauchi Makoto , Seiichi Serikawa
Published: September 2011

This paper proposes a new non-contact type chewing sensor using photo-reflector. The modulated infrared rays from the infrared LED of photo-reflector irradiate the mandible. The reflected light is received by the photo detector of photo-reflector. The chewing sensor recognizes chewing from the big movement of the mandible by chewing. By wearing the sensor in the ear, this sensor can be used in any place. The unpleasantness when using the chewing sensor is a little because the chewing sensor is non-contact type. In addition, the chewing sensor can accurately judge whether the user is chewing or not.
Development of a Heart Rate Measurement Method Using Body Conduction Sound Sensor
Authors: Fumiaki Ehara , Toshiaki Tsuruda , Tanaka Kanya
Published: September 2011

A measurement method of heart rate is suggested, that is able to calculate a heart rate from a heartbeat sound which is measured by a body conduction sound sensor. The heart rate is obtained to calculate the autocorrelation of the sound. The effectiveness of this method is supported by comparison of values measured by a blood pressure monitor and a body conduction sound sensor. When we make a measurement system using a microcomputer, it could not measure heartbeat sounds at a high frequency because of performance of the hardware. In case of lower sampling frequency is checked and, it is shown that the correct heart rates are measured in the case of a sampling frequency is hundreds of hertz in the method.
A Hybrid Method of Information Embedding for Digital Watermark
Authors: Zhang Li Feng , Li Yu Jie , Nakashima Shota , Seiichi Serikawa
Published: September 2011

Nowadays, the development of information technology is keeping in a fast speed. Large amount of information are exchanged too active to identify the original owner. A serious problem of digital contents copyright violation is happening today and the most effective manner to avoid it is digital watermark technology. In this work, a new approach for digital watermark embedding is presented. This method is different from the traditional ways which are pixel-exchanging and frequency-domain-based watermarking scheme. It combines the pixel-exchanging scheme and frequency-domain-based scheme by exchanges the lower bit plane and imitates the imaging process of a true-lens-imaging system respectively. On the other hand, This method use the point spread function as secret key that keeps the security and spread the embedded information to all bit plane of the image that keeps the robustness. Numerical simulation examples show the effect.
Proposal of Fast Implicit Level Set Scheme for Medical Image Segmentation Using the Chan and Vese Model
Authors: Lu Hui Min , Seiichi Serikawa , Li Yu Jie , Zhang Li Feng , Yang Shi Yuan , Hu Xue Long
Published: September 2011

People living in the information age, are more and more attention to their lives. It is also said, social life is more important in present and future. The social life contains three fields. In this paper, we propose a new model for active contours to detect objects in a given medical image, in order to facilitate people to have medical treatment. The proposed method is based on techniques of piecewise constant and piecewise smooths Chan-Vese Model, semi-implicit additive operator splitting (AOS) scheme for image segmentation. Different from traditional models, our model uses the level set which are corresponding to ordinary differential equation (ODE). Our model has more improved characteristics than traditional models, such as: less sensibility of noise; unnecessary of re-initialization and high speed by the simplified ordinary differential function. Finally, we validate the proposed model by numerical synthetic and real images. The experimental results demonstrate that our model is at least two times more efficient than the widely used methods.
Measurement of Mass Attenuation Coefficients of Blue Sapphire at Different Photon Energy by Compton Scattering Technique
Authors: Kaewkhao Jakrapong , Lofimkitjaroenporn P. , Tuscharoen S. , Kittiauchawal T. , Chewpraditkul W. , Limsuwan Pichet
Published: September 2011

The mass attenuation coefficients of blue sapphire were measured at the different energy of γ-rays using the Compton scattering technique. There are in good agreement of scattered gamma rays energies between theoretical value and experimental value, reflecting the validation of Compton scattering system setup. The results show that, the experimental values of mass attenuation coefficient are in good agreement with the theoretical values. The mass attenuation coefficients increase with the decrease in gamma rays energies. This may be attributed to the higher photon interaction probability of blue sapphire at lower energy. This result is a first report of mass attenuation coefficient of blue sapphire at different gamma rays energies.
Assessment of Uncertainty for Structural and Mechatronics Engineering Applications
Authors: Donders Stijn , Farkas Laszlo , Hack Michael , Van der Auweraer Herman , d’Ippolito Roberto , Moens David , Desmet Wim
Published: September 2011

Nowadays, mechanical industries operate in a highly competitive environment, therefore the process of developing a component from concept through detailed Computer-Aided Engineering (CAE) and performance validation is optimized for reduced development time and increased product performance. To continuously improve the product design and performance and reduce the costs and time to market, the design and performance engineering is shifted more and more towards virtual modeling and simulation processes from the expensive test-based design evaluations. Secondly, the booming introduction of active and adaptive systems in mechanical structures leads to a ‘mechatronics systems’ revolution, which further improves the product performance at the expense of increased system complexity. It is noted that the potential of structural dynamics test and analysis methods for addressing a structural dynamics design assessment or design optimization depends largely on the confidence that one can have in the results. That is, the results must be accurate, characteristic for the actual problem (and not be the result of testing artifacts) and representative for the actual behavior of the investigated structure. In this context, a key aspect is to be aware of the key sources of uncertainty in the designed product, and the impact thereof on the product performance in terms of structural dynamics, crashworthiness and/or acoustics. This paper reviews the main elements of test data and modal modeling uncertainty and assesses the impact of the uncertainty on some typical modeling problems taken from automotive and aerospace industry.