bluuebunny/crossref_metadata_2025 huggingface dataset:
Fuzzy Neural Network Based Coal-Rock Interface Recognition
Authors: Shi Jian Jun , Zhou La Wu , Kong Ke Wen , Wang Yi
Published: December 2010

. In the coal-rock interface recognition (CIR) technology, signal process and recognition are the key parts. A method for CIR based on BP neural networks and fuzzy technique was proposed in this paper. By using the trail-and-error, the hidden layer dimension of the network was decided. Also the network training and weight modification were studied. In order to get a higher identification ratio, fuzzy neural networks (FNN) based data fusion was studied. For CIR, the structure and algorithm of FNN were determined. The results indicated that the test data can be used to train and simulate with the neural network and FNN. And the proposed method can be used in CIR with a higher recognition ratio.
Analytical Design for Parallel Cascade Control of Multiple Degrees of Freedom
Authors: Yin Cheng Qiang , Gao Jie , Wang Hong Tao
Published: December 2010

A new parallel cascade control program of multiple degrees of freedom is proposed for chemical and industrial cascade processes. Firstly, the two degree of freedom IMC structure is adopted in the secondary control loop, and the set-point tracking and disturbance rejection are decoupled, therefore, the influence on performance of primary loop because of the coupling between the set-point tracking and disturbance rejection in the secondary loop is reduced. Then, based on a modified structure of the Smith predictor control, the primary loop realizes the decoupling control between set-point tracking and disturbance rejection, and simple and effective analytical method is adopted to devise the controllers. Finally, simulations example demonstrates the validity of the proposed control scheme.
Fuzzy Integrality Design for Maglev Networked Control System with Sensor Data Dropouts
Authors: Zhang Zhi Zhou , Zhang Ling Ling , She Long Hua , Long Zhi Qiang
Published: December 2010

Considering the parameter’s uncertainty of Maglev networked control system, a fuzzy fault-tolerant control method possessing integrity based on T-S model was proposed with sensor data dropouts. When the sensor data of maglev networked system drops out, the state variable sampled at last control period is adopted by the controller. By setting different fault models of sensors and actuators, the fuzzy discrete close-loop model of maglev system was built with system parameter’s uncertainty. A passive integrality control method against sensor and actuator failures was designed with Linear Matrix Inequation (LMI). Simulation results well proved the effectiveness of the algorithm.
The Design of Screw Extrusion Mechanism Based on Melted Extrusion Modeling
Authors: Cheng Xiao Min , Zhang Guo Liang , Zhou Gen , Cui Zi
Published: December 2010

The quality of prototype manufactured with the method of Melted Extrusion Modeling was affected directly by screw extrusion mechanism’s performance, especially, the design of screw is an important part, the optimization of parameter and structure of the screw could improve the efficiency of extrusion mechanism and quality of the prototype. According to extrusion theory and existed experience, every parameter of the screw was exhaustively designed and the slot deep upheaval screw was designed to have three zones: feed zone, compression zone and metering zone, also it was deeply analyzed and proved that it could increase the flux of the screw extrusion machine, besides the flux was well-proportioned. The nozzle structure was designed at the same time. System control was realized by the aid of machining center.
Design and Testing of a New Metallic Solution for Toecap Component on Safety Footwear
Authors: Costa Sérgio , Peixinho N. , Mendonça J.P.
Published: December 2010

This paper explores an innovative solution based on the geometric redesign of integrant safety shoe`s component, the toe cap component. The investigation program covered some steps as the computational modeling of the toecap component, a set of numerical simulations in the FEM context with the toecap model discretization used for multiple Non-Linear Analysis on plastic domain, and experimental tests for ISO EN 20345 certification to support and comparing results. The aim of the study is to explore the work hardening phenomenon of the high strength steel DP600 on toecap component formed, to predict an expected mechanical strength increase and a consequent significant reduction of the weight. The study points to a thickness decreasing value of approximately 50% and equivalent reduce of weight.
Finite Element Analysis and Structural Parameters Optimization of Piezoelectric Vibration Energy Harvester
Authors: Hu Ai Min , Long Ming
Published: December 2010

The working principle of piezoelectric vibration energy harvester is described. A piezoelectric cantilever and mass composite structure is proposed to harvest vibration energy in resonance mode, and the mass is added on the edge of the cantilever to decrease the natural frequency of the whole structure. The finite element analysis was carried out on the composite structure using the ANSYS software. The displacement results were obtained by structural analysis, and the first order natural frequency was also obtained by modal analysis. Finally, the influence rules among the structural parameters, such as length and width of the cantilever, length and thickness of the mass and width of the PZT, and the natural frequency, piezoelectric output voltage are discussed in detail. Finally, the optimal structure of the harvester is obtained.
Research on the Forming Limit Diagram Based on Laser Shock Forming
Authors: Jiang Yin Fang , Tang Zhen Zhou , Li Zhi Fei , Fang Lei
Published: December 2010

Laser shock forming (LSF) of sheet metal is a novel technology in plastic deformation. It is necessary to correctly predict the Forming Limit Diagram (FLD) based on LSF. New failure maximum thickness reduction rate criterion is used to determine the forming limit based on the numerical system during LSF. The relationship model between maximum thickness reduction rate and the strain path is built. In addition, the effects of strain path and strain-hardening exponent on forming limit are considered. The maximum thickness reduction rate under equi-biaxial tensile strain path can be determined easily during LSF and the expression of the criterion is determined finally. Then the limit strains under other strain paths between uniaxial tension to equi-biaxial tension can be determined by the criterion combined with numerical simulation of forming process. The criterion can predict forming limits for sheet metal exactly and makes it possible to determine forming limit strains under different strain paths only through equi-biaxial tensile test during LSF.
Theoretical Study on Overlapping Mechanism in SLM Based on Interlayer-Staggered Scan Strategy
Authors: Su Xu Bin , Yang Yong Qiang , Liu Jie
Published: December 2010

In the study of the overlapping mechanism in selective laser melting (SLM) process based on interlayer-staggered scan strategy, relationship between the intra-layer overlapping rate and the inter-layer overlapping rate was obtained by theoretical deduction based on the continuity of layers; the overlapping mechanism and the depositing efficiency were later analyzed. Results showed that three types of overlapping mechanism exist under different values of overlapping rate: the intra-layer overlapping mechanism, the inter-layer overlapping mechanism and the mixed overlapping mechanism with coexistence of the first two types; the maximal depositing efficiency of intra-layer overlapping mechanism and inter-layer overlapping mechanism is 0.38 and 0.5 respectively. This study has provided basic theory for improving depositing efficiency in SLM process.
Optimal Control of Semi-Active Suspension Based on ADAMS and MATLAB/Simulink
Authors: Gao Rui Zhen , Xu Zhi Qiang , Zhang Jing Jun
Published: December 2010

This paper establish a multi-body dynamic model of the Vehicle. The fuzzy logic controller was designed for the semi-active suspension based on improved genetic algorithm, then, the co-simulation were carried out based on Adams and Matlab/Simulink. The results demonstrate that this control method enhances the performance of the full car suspension system significantly.
Dynamic Characteristic Research on Thin Rim Structure for Herringbone Planetary Gear Train
Authors: Ma Shang Jun , Liu Geng , Bu Zhong Hong
Published: December 2010

A torsional and translational vibration dynamics model for serial herringbone planetary gear train, which considers the effects of the time-varying errors and meshing stiffness as well as elastic coupling between two stage trains at the same time, was established by using lumped mass method. Time domain dynamic load excitation which derived from dynamics equation is taken as the input of steady-state response solution. The steady-state response of gear structure was solved with mode superposition method combined with external judgment program. The effects of rim thickness for thin wall herringbone planetary gear and single-stage internal gear were also analyzed. Through the comparison, the displacement and stress results of key locations on structure have reached the satisfying and disirable values when the rim thickness of planetary gear is greater than 4.0 mn and rim thickness of internal gear greater than 6.5 mn.
Design and Implementation of Mobile Objects Tracking System Based on Wireless Sensor Network
Authors: Wei Bo , Yao Lan , Gao Fu Xiang
Published: December 2010

ZigBee technology, based on the IEEE802.15.4 protocol, is a newly developed short range wireless communication technology with the merits of low cost, low power consumption at comparably lower data rate. Mobile objects tracking system based on wireless sensor network becomes a hot topic recently. The paper, aiming at wireless sensor network, investigates the tracking system. Based on RSSI and location engine, the tacking system is implemented. The system includes three parts: hardware platform preparation, communication program of nodes and PC monitor software. The core of hardware platform is CC2430 and CC2431. The exploitation of node communication program is based on Z-Stack protocol stack which is provided by TI. The paper goes into details of the nodes communication flow. Elaborate solution is proposed in this paper. In the end, practical test is implemented. This part analyzes the influence of the different location area consisted by reference nodes to the accuracy and stability of blind nodes.
A Method to Measure the Dynamic Response Time for an Electronic Fuel Injector
Authors: Guo Hui , Zhang Zhen Dong , Li Qing Jun , Sun Yue Dong
Published: December 2010

The focus of this research effort was to develop a technique to measure the dynamic responding time of the electronic fuel injector (EFI). Successful implementation of the measurement technique introduced in this paper can be used to evaluate injectors and improve its design. More consistent and precise fuel injectors have the potential to improve fuel efficiency, engine performance, and reduce emissions. According to the dynamic working process of the EFI, the coil current of the EFI can bitterly reflect its dynamic response time, which is the measurement mechanism. Then the test circuits of the opening and closing response time of the EFI were designed, and the measurement system was developed with the C8051F310 as the processor. The results showed that the measurement errors of the opening and closing response time of the EFI were 0.9% and 1.14%, and this met to the testing requirements of some research on the EFI. And so, the measurement system was low cost, convenient and high precision.
Optimization of Photovoltaic-Electrolyzer System by Direct Coupling
Authors: Liu Ye Feng , Su Qiang , Zhang Hua , Cai Cao Ping
Published: December 2010

Hydrogen fuel produced by photovoltaic-eletrolyzer system is a solution to solve problem of global warming, air pollution and fossil fuel crisis. The efficiency of photovoltaic-electrolyzer system can be promoted by the optimal matching between photovoltaic modules and electrolyzer. Based on experimental test and mathematical model, a certain series–parallel connection of photovoltaic cells is determined to match with electrolyzer. The aim is to match the voltage and the maximum power output of the photovoltaic modules to the operating voltage of the electrolyzer. So some auxiliaries such as DC-DC converter, maximum power point (MPP) tracking unit can be omitted. Therefore, the cost and resistances in the circuit are greatly reduced.
Hybrid Calculation Method of the Sound Transmission Loss of the Engine Air Cleaner
Authors: Feng Tao , Wang Jing , Li Nan , Xiao Wei Min
Published: December 2010

A kind of hybrid method to calculate the sound transmission loss (STL) of the air cleaner is researched here and the acoustical effect of the filter material is emphasized. The two-port model is decided to describe the sound transmission property of the filter material and the experimental identification method to obtain the elements of the transfer matrix is researched as well. This calculation method is applied to calculate the STL of a kind of engine air cleaner in two conditions with and without the acoustical effect of the filter material. The filter material shows the effect of sound absorption and acoustical damping and raises the level of the STL.
Cooling Simulation of External Gas-Assisted Injection Molding
Authors: Jiang Shao Fei , Zhang Jia Bo , Chai Guo Zhong , Li Ji Quan , Su Mao Ying
Published: December 2010

This paper present a cooling simulation method for External Gas-assisted Injection Molding (EGAIM). To simulate the cooling process of EGAIM, a Finite Element Method model with heat transfer processing with isotropic materials containing inner heat source was established, and pressure was loaded on the interface of mold and part as gas packing pressure. The simulation was used to explore the effect of process parameters on the quality of an example with different thickness ribs with ANSYS. The results showed the method is feasible and reliable.
A New Framework for the Accurate FE Model of Bone Tissue Based on CT Images
Authors: Huang Xiao Hui , Zhao Guo Qun , Liu Wen Guang , Liu Pei Lai
Published: December 2010

The frameworks for finite element (FE) model of bone tissue available in pervious literatures, to some extent, are expert-oriented and give rise to a considerable deviation in geometric model and assignment of material property. The objective of this study is to develop a new framework to reconstruct accurate individual bone FE model based on CT images rapidly and conveniently. In image-processing, automatic segmentation of the region of interest (ROIs) improves the efficiency. The idea of enclosed volume of interest (VOI) overcomes the drawback of geometric ambiguity in Marching Cube (MC) method. Geometric model is easily obtained by a STL translator and smooth operator in home-made program. In the material property assignment, two templates for hexahedron and tetrahedron FE models, respectively, are put forth to smoothing an abrupt change of material property in the region from cortical to cancellous. K-mean algorithm is introduced to cluster material properties to improve partition performance. Finally, the new framework is demonstrated by the implementation of a femoral FE model.
A Fault-Tolerant Router Algorithm Based on Hamiltonian Cycle in Wireless Sensor Network
Authors: Jing Wei Peng , Liu Ya Qiu , Wu Qu
Published: December 2010

In wireless sensor network, energy conservation is the primary goal, while throughput and fault tolerance are other important factor. In this paper, we propose a novel fault-tolerant link-based Hamiltonian Cycle (FLHC) scheme for tolerating the single-link or single-node failure. Theoretical analysis and simulations show that FLHC has better resources utilization ratio and faster recovery time. Thus the topology which uses the method to build has good fault tolerance and robustness.
Cross-Coupled Synchronized Control for Bi-Cylinder Servo System
Authors: Liu Ya Qiu , Wu Qu , Jing Wei Peng , Zhu Liang Kuan
Published: December 2010

The paper focuses on cylinders synchronized control in continuum press for particleboard hot-pressing. An equal-status cross-coupled synchronized controller based on disturbance and synchronizing compensators has been designed and employed to an electro-hydraulic servo system driven by bi-cylinder. The simulations demonstrate that the controller eliminates synchronizing error faster and control two motion-units to move synchronously in a cross-coupled system than the controller with no compensator. And the robust of system has been enhanced.
Simulation of Wireless Acoustic Sensor Network Localization System Using True Time
Authors: Chen Chang , Song Ping , Pei Da Ming , Li Ke Jie
Published: December 2010

The emergency of wireless sensor network provides a distributed, low cost and flexible solution for acoustic localization system. Location precision is a critical parameter for this system. In this paper, we use True Time, which is a Matlab/Simulink co-simulation block library to establish a simulation environment and establish a relationship between localization precision and PRR (Package Reception Rate). With the PRR decreasing, the AOA precision is get lager. Hence, in a given spatially deployed sensor network location system, the location precision will get larger. Therefore, the PRR should be controlled in a rational level, which is depended on the trade-off between performance and efficiency.
Protection of Earthquake-Disturbed Workshop Building by Using Piezoelectric Smart Devices
Authors: Zheng Jin , Chen Bo , Wei Jian Feng
Published: December 2010

The feasibility of using piezoelectric smart devices to develop a smart material-structure system and thereby to prevent structure from earthquake is carried out in this study. The piezoelectric actuators are utilized to develop a smart friction damper with controllable parameters. The interaction of a smart material-structure system is analyzed through the numerical integral and iteration. The seismic mitigation of the dynamic responses of a workshop structure with the piezoelectric smart controllers is conducted through a proposed semi-active control strategy. It is observed that the structural seismic responses can be remarkably mitigated under the protection of the smart system..
Impacting Analysis on the Coupler and Buffer of a Subway Vehicle for the Shunting Operations
Authors: Zhang Suo Huai , Zhang Ping Man , Jia Kun
Published: December 2010

After the general model of shunting operation was established, non-linear damping force was imported into ADAMS by means of spline function. Under the same coupling speed, the relationship between different shunting groups, the maximum impacting force and the buffer stroke was researched; the different impacting characteristics of the system were also analyzed under different shunting operations by means of the impulse transmission and kinetic theory method. In the condition of the same coupling speed and vehicles, the results are that the number difference of moving vehicles and static vehicles between the coupling interface was more, the maximum impacting force was smaller, and the buffer stroke was shorter.
A New Spurts Controllable Electrospinning Collecting Device Designed Basing on Advanced Motion Control
Authors: Liu Yuan Yuan , Li Qing Wei , Hu Qing Xi , Jing Chang Juan , Wang Qiang Gao
Published: December 2010

Electrospinning is an advanced manufacturing technology combined with machinery, automatic control and computing technology, it is popular used in numbers of fields and has appealed the attention of a great many scholars in and aboard, and its controllable ability has become the fuscous point. In order to make seize of the fiber diameter and realize the collection aligned, this paper designed a new device basing on the analysis of the influence elements during the electrospinning experiment in the direction of process control to achieve effectively organization on these parameters. What’s more, the writer showed not only the mechanical structure, but also the corresponding system design, focusing on the plan of coordination multi-axis motion with movement control CARDS. After all, this device is able to complete the effective coordination of spray distance and the target velocity, and improves the manage ability of the whole device operation.
Analytical Solution to Excited Waveform of Bias Control on Electro-Hydraulic Vibration Exciter
Authors: Ren Yan , Ruan Jian , Yi Ji Yan
Published: December 2010

For precisely controlling the bias position of an electro-hydraulic vibration exciter, a scheme of a parallel mechanism of a two-dimensional valve (2D valve) and a servo valve is proposed. In the low frequency section, the mathematical model of the electro-hydraulic vibration exciter is simplified reasonably. A vibration central position is first analytically derived by assuming that 2D valve connected with parallel valve is equivalent to a single slide valve with neutral positive opening and the time-average flow rate through them is identical. And then the analytic solutions to excited waveforms superimposed on the bias position are further obtained. Finally, the experimental system is built to verify the theoretical analysis. The results reveal that this approximate analytical solution could describe excited waveform of bias control on electro-hydraulic vibration exciter. When the opening area of 2D valve is a constant, the bias position follows a linear relation with the throttling areas of the parallel valve which is no more than the maximum position. The excited waveform is close to the sinusoidal waveform. At the same opening area of the parallel valve, the bias position is reduced as the area coefficient of 2D valve increases. The proposed scheme not only ensures the frequency and the amplitude to be controlled independently but also the bias position to be adjusted precisely.
Application and Prospect of Pneumatic Servo Manipulator in Medical (Surgical)
Authors: Zhu Geng Yin , Luo Jing , Yuan Yu Bi , Ba Shao Nan
Published: December 2010

Manipulator has an important effect on the present medical surgical technique. This paper introduces the pneumatic manipulator in medical (surgical) on the development process, current situation, main problems and current trends. Discussed the cylinder, pneumatic servo valve, and the manipulator control system separately.
Optimal Design of Mechanism Parameters for Rolling-Cut Shear
Authors: Qin Qin , Zhao Ze Bo , Wu Di Ping , Zang Yong
Published: December 2010

In order to improve shearing quality, the structure of rolling-cut shear (RCS) should be designed carefully to guarantee a pure rolling condition of the top blade and the amount of scissors overlapping (ASO). This paper describes an investigation into the work mechanism of RCS. A parametric model of RCS has been established by using ADAMS software. The influences of the ASO and the horizontal displacement of the top blade (HDTB) are also discussed. The indications are that the length of crank, guide rod and link, initial phase angle, the position of gyration center for guide rod and the radius of the top blade arc are key factors to the ASO and HDTB. Moreover, those structure parameters that influence the ASO and HDTB are selected as design variables. An optimal mathematic model has been established by using two objective functions that are ASO and HDTB in the cutting process. This optimization model has been used successfully in the development of RCS 3800 to obtain reasonable mechanism dimensions for improving shearing quality. The study results provide a new idea for designing the RCS.
The Operation Control Technology of Wind Generating Set
Authors: Wu Guo Qing , Yang Kun , Mao Jing Feng , Zhang Yu Mei , Zhou Jing Ling
Published: December 2010

The operation control technology of wind generating set is directly related to the level of power quality. The improvement and optimization of control strategy is always the focus of scholars. Several operation control technology for Wind power generation system are reviewed. The main research results of CSCF control and VSCF control are summarized. At the same time, the development trend of wind power generation is also discussed, and it is pointed that the technology of magnetic suspension will be the main direction of future wind power development.
Simulation of Vector Control Strategy of PMSM Based on MATLAB
Authors: Wu Guo Qing , Chen Zhi Jun , Mao Jing Feng , Zhang Yu Mei , Zhang Xu Dong , Yang Kun , Zhou Jing Ling , Cao Yang , Zhu Wei Nan
Published: December 2010

In the fields of numerical control machine, robot etc, vector control system of permanent magnet synchronous motor (PMSM) has widely application prospects. Proportion integration (PI) adjustment block, coordinate transformation block, space vector pulse width module (SVPWM) block and the simulation model of the whole system are built in MATLAB/SIMULINK according to the mathematical model, SVPWM technique and vector control theory of PMSM. The simulation results show that stator winding triphase current can run smoothly, speed and output torque can be accurately follow the given value. The results provide the basis for further research of the performance of the PMSM control system.
Numerical Simulation of High Velocity Impact with SPH Frictionless Contact Algorithm
Authors: Zhang Zhi Chun , Qiang Hong Fu , Gao Wei Ran
Published: December 2010

The continuity velocity algorithm is widely used in SPH for high velocity impact simulation, but there is some error when calculating the separation between projectile and target. This paper adopts SPH frictionless contact algorithm to handle the contact problem in high velocity impact, and the perforation of a cylindrical steel projectile impacting a plate target is simulated in 3D. The corrected Johnson-Cook material model with damage effect and Gruneisen equation of state are adopted for the target. The SPH frictionless contact algorithm checks interpenetration between projectile and target using SPH neighborhood search, and contact force is enforced for contact particles. The comparisons between numerical simulations and experimental observations show that the SPH frictionless contact algorithm allow projectile and target to come together and separate in a physically correct manner.
Kohonen Neural Network – Based Performance Improvements for Wafer Photolithography Process with CONWIP Control Strategy
Authors: Zhou Bing Hai
Published: December 2010

Photolithography is usually the bottleneck process with the most expensive equipment in a semiconductor wafer fabrication system. To improve the performances of the photolithography area with dynamic combination rules, a method of Kohonen neural network (KNN)–based performance improvements is proposed. First, a dynamic scheduling framework based on a KNN model and scheduling rules is proposed. A KNN-based sample learning algorithm for improving the performances is presented. Finally, to demonstrate the validity and feasibility of the proposed method, data from a real wafer fabrication system are used to simulate the proposed method. Results of simulation experiments indicate that the proposed method can be used to improve a complex wafer photolithography performance.
An Evolutionary Lagrange Method for Mechanical Design
Authors: Lin Yung Chin , Lin Yung Chien , Huang Kun Song , Su Kuo Lan
Published: December 2010

A novel application to mechanical optimal design is presented in this paper. Here, an evolutionary algorithm, called mixed-integer differential evolution (MIHDE), is used to solve general mixed-integer optimization problems. However, most of real-world mixed-integer optimization problems frequently consist of equality and/or inequality constraints. In order to effectively handle constraints, an evolutionary Lagrange method based on MIHDE is implemented to solve the mixed-integer constrained optimization problems. Finally, the evolutionary Lagrange method is applied to a mechanical design problem. The satisfactory results are achieved, and demonstrate that the evolutionary Lagrange method can effectively solve the optimal mechanical design problem.
An Analysis of Cultural Factors in High-Speed Train Design - Taking Virgin Pendolino High-Speed Train as an Example
Authors: Liu Xiao Lu
Published: December 2010

The production of high-speed train in China is technology-oriented, rather than design-oriented, so the analysis and research of high-speed train related to design and cultural factors is very scarce. In this article, the author took Virgin Pendolino high-speed train as an example, and analyzed the influence of multi-cultural factors in high-speed train design. The analysis of the article carried out from two aspects: one is the users’ cultural backgrounds of the design, which refers to the countries or regions in which the train are running; the other is the providers’ culture of the design, including high-speed train operators and designers. Through a detailed interpretation and analysis of the impact of cultural factors on Virgin Pendolino design, the author attempts to provide a useful reference to China’s high-speed train design.
A Novel Deign Method of Laser Diode Power Supply
Authors: Cui Wei , Chen Dian Ren , Yue Yu Bo , Chen Lei , Li Xing Guang
Published: December 2010

In this paper, a digital control continuous light-emitting laser diode power supply has been present. According to the characteristics of laser diode, the is easy controlled, miniaturization, high efficiency, non-impact and slow-start. The mathematical model of current source circuit and the design method of transform the analog control model to the digital control model is established to improve the performance of laser diode current source. The efficiency of supply is better then 92%.
Mechanical Analysis and Study on Structural Parameter of Partially Earth-Anchored Cable-Stayed Bridge Part II: Parametric Study
Authors: Zhang Li Wen , Xiao Ru Cheng , Xia Rui Jie
Published: December 2010

Based on a partially earth-anchored cable-stayed bridge with 1218m main span and composite beam, the parametric study of this bridge type was conducted in this paper. The bridge was simulated with space pole department model, in which the beam element was used to model girder and tower, the truss element was used to model stayed-cable whose sag effect was corrected by Ernst theory. The load cases considered in analysis include: dead load and live load. The analysis content include: the girder bending moment, the girder axial force, the girder stress, the tower flexural moment, the tower axial force and the tower stress.
Optimization Design of Diffusers for Supersonic Separators
Authors: Wen Chuang , Cao Xue Wen , Yan Bin , Zhang Jing
Published: December 2010

The diffuser is the key part of a supersonic separator, which is a new device for natural gas separation. In this paper, three diffusers are designed for the supersonic separator. The fluid flow in the diffuser is numerical calculated, using the RNG k- turbulence model. The behavior of gas dynamic parameters is analyzed under conditions of shock waves and boundary layers. The numerical results show that the second throat diffuser is a good choice for the supersonic separator, both from the perspective of the pressure recovery and adjustment to the back-pressure changes.
Design and Modeling of a 2-Dofs Wave Energy Converting Device for Underwater Vehicles
Authors: Wang Xiao Ming , Shang Jian Zhong , Luo Zi Rong , Yang Jun Hong
Published: December 2010

Based on the principle of 2-dofs inertia pendulum, a wave energy converting device (WECD) to realize the energy self-supply for underwater vehicles was proposed in the paper, which can absorb movements or forces from two directions perpendicularly. The key part is the one-way device, which converts the irregular oscillation into one-way rotation. Therefore, the energy obtained is stored in torsional coil spring to drive a generator. The dynamic equation of the simplified model was presented on the basis of Lagrange equation, and the variations of angles in 2-dofs were obtained through an example by Runge-Kutta (RK), and the parameters and qualifications for the device optimization were also analyzed by comparison. The analysis provides necessary information for dynamic performance analysis, optimal design, efficiency analysis and control of WECD.
Open Architecture Automotive Electronic Control System Based on Quantum Frame and SAE J1939
Authors: Li Hong Bin , Yu Jing Nuo
Published: December 2010

In consideration of the shortcoming of the close automotive electronic control system, through the analysis to the requirement of the open system and existing way to establish an open system, an open architecture automotive electronic control system based on quantum frame and SAE J1939 is established adopting the advanced software technology of embedded system. The quantum frame is used as the software bus, the SAE J1939 is used to defined the application information standard. Further more, the hierarchy of the application software, the protocol of each bus and the web structure of the system is proposed.
Open AMT Control System Based on Quantum Frame
Authors: Li Hong Bin , Li Dong
Published: December 2010

In order to achieve the open of the AMT (Automated Mechanical Transmission) control system, and then convenience the updating progress. An open control system based on quantum frame is established adopting the advanced software technology of embedded system. Each step during the designing process is depicted, the application software is designed.
A Novel Fusion Method for Multi-Focus Images
Authors: Wang Wen Cheng , Chang Fa Liang
Published: December 2010

A simple but efficient algorithm for multi-focus image fusion is proposed in this paper, which is realized based on Laplacian pyramid decomposition. Firstly, the Laplacian pyramids for each source images are decomposed separately, and then each level of new Laplacian pyramid is fused by adopting a simple fusion rule. Finally, the end fused image is obtained by inverse Laplacian pyramid transform. The experiment showed that this method is effective and can get a fine fusion result for multi-focus images.
Study on the Method of Humanized Design
Authors: Yang Mei , Bo Qi Fang
Published: December 2010

The realization of function is always the primary motive of designers, and they do their best to design the function of a new product. However, with the raise of modern design concept, more and more attention is transferred to the harmoniousness of the product. Besides function, human factor in design is highly emphasized. The connotation of humanized design is firstly introduced in this paper. Then, Factors of humanized design are discussed, including need, ergonomics, reliability and aesthetics. Especially, the importance is pointed that form design meeting the people’s aesthetic requirements based on psychological feelings. Taking electronic products as example, the method of humanized design is wisely analyzed from the aspects of form application, symbolistic application and intention transmission, which is helpful for designing products more pleasant and comfortable to use.
Research on Guarantee Equipment for Setting Load of Hydraulic Supports
Authors: Zhang Xin , Zhang Jian Wu , Wan Li Rong , Zang Meng
Published: December 2010

To solve the shortage of setting load of hydraulic support, this paper puts forward a computer simulation method. The reason for the shortage of setting load is firstly analyzed by simulating the pressure curve of prop’s lower chamber and the displacement curve of movable prop. It can be found that even prop lower chamber is supplied with fluid continuously, the pressure won’t reach to the pressure of pumping station, and the setting load also can’t be achieved. Secondly, the principle of auto-pressurized guarantee equipment for setting load is present. Only acting on one displacement, the pressurized valve can reach the pressure of pumping station. Simulation result also indicates that it can meet the requirement of setting load in a short time after the top beam reaches to the roof.
Electronic Document Management System Oriented Collaborative Design
Authors: Ding Jun Mei , Zhang Tian Rui , Wang Sha , Wang Wan Shan
Published: December 2010

According to the practical requirements of collaboration and document management in enterprises, the paper presents the methods of products of electronic document management, automation and networking to ensure product data integrity, unity, sharing and security, and does the research on key points of architecture, version management and electronic countersignature of collaborative design oriented document management. Besides, based on the theoretical study, a prototype system of collaborative design oriented electronic document management is developed. The operated results of the system verify the correctness of theoretical research and technical feasibility.
Design of a Gas Sensor for Hydrazines Based on Photo-Ionization Principle
Authors: Liu Jun , Tan Qiu Lin , Xue Chen Yang , Xiong Ji Jun
Published: December 2010

Based on the photo ionization principle, a gas sensor for the hydrazine is designed. The photo ionization gas sensor can also measure other volatile organic compounds and other gases in concentrations from sub parts per billion to 10000 parts per million (ppm). This gas sensor is the most efficient and inexpensive type of gas sensor. They are capable of giving real-time readings and monitoring continuously. The design of micro ionization chamber, signal detection circuits and installation technology is expatiated in detail. Through researching the design of cell structure, the cell with integration and miniaturization has been devised. By taking Single-Chip Microcomputer (SCM) as intelligence handling, the functional block diagram of gas detection system is designed with the analyzing and devising of its hardware and software system. Experiment results show that the gas sensor has reached the technology requirement of portable, mini-volume, high accuracy, fast response, continuous test, and is able to apply in detecting the organic gases. Therefore, the photo ionization sensor has a promising future for the hydrazines gas and volatile organic compounds detection.
An Extension of Apriori Algorithm to Discover Individualized Treatment Optimization of Breast Cancer
Authors: Fan Qi , Zhu Chang Jie , Yin Liu , Xu Xiao Lu , Rong Feng , Xiao Jian Yu , Wang Bao Hua
Published: December 2010

Normally there is the very huge dataset in the application of medicine and bioinformatics. Traditional association algorithm produces too many rules in this kind of application, which are difficult to be identified and compared. In this work we attempt to propose an extension of Apriori algorithm to explore individualized treatment optimization of breast cancer. As the result of our method, the comparative association rules are produced. Thus, association rules algorithm become more practical and useful, especially in the field of medicine and bioinformatics.
Extension of Traditional Frequency and Research on Time-Frequency Distribution
Authors: Liu Shu Lin , Wang Xian Ming , Wang Hui , Zhao Hai Feng
Published: December 2010

The concept of traditional frequency is extended and the concept of local frequency is proposed, which makes the physical meaning of frequency clearer. The wide adaptability of local frequency is also discussed. Moreover, a novel time-frequency analysis method is presented based on local frequency. The time-frequency distribution of continuous triangular wave signal is analyzed by the novel approach. Compared with wavelet transform and Hilbert-Huang transform (HHT), the results show that the concept of local frequency is correct and the novel time-frequency approach is effective.
Effect of Different Cooling Speed and Rare Earth La on the Microstructures and Phase Constitution of Al-Fe Alloy
Authors: Mi Guo Fa , Dong Cui Fen , Zhao Da Wei
Published: December 2010

The casting, sub-rapid solidified and rapidly solidified A1-5Fe alloys, with or without rare earth La have been respectively prepared by vacuum melting furnace, suction casting and melt spinning furnace. And the alloys were investigated with OM, TEM and XRD. The results show that the microstructure was apparently refined by the increasing of cooling rate. Meanwhile, the acicular Al3Fe phase transferred to flower-like phase in casting A1-5Fe alloy and the matrix morphology of the alloy also was changed in sub-rapidly solidified Al-5Fe alloy, while 1.5wt% La was added. The metastable phase A16Fe and Al11La3 phase with high melting point were found in Al-5Fe alloy and A1-5Fe-1.5La alloy.
Technology Optimization on Preparation of Silicon Dioxide from Rice Husk
Authors: Gao Feng , Liu Yun Yi , Ge Ying Xin , Sun Huai Yu , Zhang Xiang
Published: December 2010

Response surface methodology (RSM) was adopted to study the key parameters such as acid leaching time, calcined temperature, calcined time in order to increase silicon dioxide extracting rate from rice husk. A second order quadratic equation was established and the applicability of model and interaction involved factors on predicting the SiO2 extracting rate was verified. The results indicated that the effect on the SiO2 extracting rate was as follows: calcined time, acid leaching time, calcined temperature. The optimal levels for achieving the highest SiO2 extracting rate were obtained ,including calcined time of 1.495 hour, acid leaching time of 36 hour, calcined temperature of 620°C. The SiO2 extracting rate reached 73.4% under optimized conditions. Extracting rate were conducted under the optimum condition and the results showed the models fitted well.The products XRD diffraction analysis proved that it was amorphous SiO2 .
Process Planning and Tool Design of Magnetorehological Jet Finishing
Authors: Cheng Hao Bo , Wang Tan , Feng Yun Peng , Yam Yeung
Published: December 2010

Magnetorehological jet finishing (MJF) for optical materials is a promising technique, which characterized as polishing arbitrary surface patterns and correction plates, micro-channels, thin ultra-uniform thickness substrates and near perfect optical components. The process and the machine are complicated. This paper is concerned with the process optimization and tool design, and results obtained by FEA on the designed MJF tool.
Experimental Research on Heat Transfer Characteristics of Tube Bundles of Different Materials under Vacuum Conditions
Authors: Cheng Shen , Sun Feng Zhong , Gao Ming
Published: December 2010

In order to find an excellent kind of heat transfer element under vacuum condition, the heat transfer performance of tube bundles of different materials in vacuum state was studied through experiments, of which include stainless steel tube, brass tube, Ni-based implanted steel tube and ion implanted brass tube. The relative curves prove that the condensation heat transfer coefficient and the overall heat transfer coefficient of four kinds of bundles all increase with the rising vacuum and increasing Re value, especially of the Ni-based implanted steel tube and the ion implanted brass tube. Under higher vacuum (0.07MPa), for larger Re value (24613), it was found that the condensation heat transfer coefficient of Ni-based implanted steel tube bundle is about 3 times that of the stainless steel tube bundle, the condensation heat transfer coefficient of ion implanted brass tube bundle is about 2.4 times that of the common brass tube bundle as well. Therefore, it is believed that partly dropwise condensation was achieved on the surface of these two implanted tube bundles, and ion implantation is proved to be an effective method of dropwise condensation attainment. According to the conclusion, it is considered that the Ni-based steel tube can substitute more expensive brass tube as heat transfer component to some extent.
Hydration of Water Entrained Cement Paste under Saturated Condition
Authors: Jiang Ya Qing , Xia Qian Feng
Published: December 2010

Hydration characteristic and microstructures of water entrained cement paste with water-cement ratio (w/c) of 0.30 cured under saturated condition were studied. Degree of hydration was quantified by loss on ignition (LOI) measurements and BSE imaging. Volume of capillary pore of the hydrated paste was evaluated by using scanning electron microscopy. Degree of hydration of internally cured cement paste under saturated condition is higher than that of control paste without water entrained. A reduction of volume of capillary pore is obtained for the promotion of cement hydration. Quantity of entrained water is a time dependent function at early age in the presence of continuous external water supplying. A model was proposed for evaluation degree of hydration of cement under a combination of internal curing and saturated curing, based on equivalent w/c. Experimental results indicate that internal curing can efficiently accelerate early age hydration of cement and that only 50% of theoretical entrained water is needed for mitigation chemical shrinkage and for achieving maximum degree of hydration of cement paste with low water-cement ratio.
Size Dependent Strength of Fiber Eutectics and Transformation Particles Composite Ceramic
Authors: Ni Xin Hua , Sun Tao , Liu Xie Quan , Gu Qing Hua , Meng Xiang Feng
Published: December 2010

Fiber eutectics and transformation particles composite ceramic possessed good strengths and creep resistance. It is mainly composed of fiber eutectics with random orientation and transformation particles. First, on basis of the strong constraining effect of the microstructure in fiber eutectics, the micromechanical stress field in fiber eutectics is determined by shear stress that develop between the fiber- inclusion and matrix is obtained. Then, the stress concentration duo to the dislocation pileup on the fiber- matrix interphase is analysised, and the maximum stress in matrix is obtained. Letting maximum stress in matrix equaled to theoretical strength of matrix, the micro strength formation of fiber eutectics is gotten. Finally, considering random orientation and length of fiber eutectics, the macro mechanical strength model of fiber eutectics and transformation particles composite ceramic is built. Result indicates that the fracture strength of composite ceramic has obvious size dependence: the fracture strength of composite ceramic will increase as the diameter of the fiber inclusion in fiber eutectics decrease.
Application of Computer Integrated Process System in the Pulp and Paper Industry
Authors: Xiao Zhong Jun
Published: December 2010

For the modern pulp and paper industry with high technical requirement, huge energy consumption and large pollution output, the computer integrated process system (CIPS) of the flow industry which could effectively integrate corporate management concept, information technology and automatic control technology is necessary. Based on the analysis of the characteristics of various workshop sections of the pulp and paper industry, we put forward the CIPS three-layer system structure (ERP, MES and PCS) which could be applied in the pulp and paper industry, and a new CIPS optimized application project based on SIMATIC PCS7 software platform for the papermaking corporation is realized.
A Study on the Performance of Drinking Fountain Using CO2 Heat Pump under Different System Pressures
Authors: Wu Yu Lieh , Shiue Yu Dai , Chien Kuo Hsiang , Wang Chiu Li
Published: December 2010

To avoid continuous damage of ozone layer and deterioration of global warming, many countries have devoted to the development and application of natural refrigerant. Although CO2, an alternative refrigerant in the area of air conditioning is not the best all-temperature refrigerant, it has the lowest operating risk as compared to hydrocarbon (HCs) and ammonia.Traditional drinking fountain provides heat source through secondary energy source - electric heating; however, the heating effect is limited. Since heat pump has a high performance, this study used a carbon dioxide heat pump, which has energy-saving effect and high efficiency, to provide heat source to drinking fountains. It further assembled the drinking fountain system with carbon dioxide heat pump and analyzed its performance.