bluuebunny/crossref_metadata_2025 huggingface dataset:
Structure Analysis of Inner Cylinder Components of Drum Washing Machine Based on Ansys/Workbench
Authors: Sun Wei Li , Zhang Sen , Ge Wei Wei , Li Yuan Yuan
Published: August 2013

The structure of inner cylinder component of drum washing machine has a critical impact on its working performance and service life, as a result, the structure analysis of the drum assembly (spider and main shaft) is chosen to be the research object in this paper. As the three-dimensional model is established by PRO/E, the structure intensity characteristic has been analyzed with the method of finite element analysis which is based on software Ansys/Workbench. According to the stress distribution characteristic, the maximum stress value that the spider has been bearing can be contrasted and analyzed with different load which can make sure the periodic properties of structure loads. The analysis and optimization method based on Ansys/Workbench provided a new thought which had the guiding significance for the development of new products of drum washing machine.
Optimization and Force Analysis of Bar Linkage Hinge Point of Self Erecting Tower Crane
Authors: Luo Ji Man , An Yu Zhen , Zhang Ming Shan , Liu Yue
Published: August 2013

In order to reduce the cylinder work force on pull tower linkage of self-erecting tower crane, the geometric parameters of hinge points about linkage mechanism were optimized. Through the force analysis to whole system of bar linkage, the cylinder force of bar linkage is regarded as optimization objective function, and the geometric parameters of working devices hinge points are used to variables, then, the optimization model is established. The optimization design is conducted based on the fmincon function of MATLAB optimization toolbox. The curve about force of the cylinder with the towers rotation angle variation can be obtained. Comparison of the results before and after optimization is showed that the maximum force of cylinder is reduced 11.5%. It is shows the optimization method is quickly and effectively. The results of parameter optimization improve the working performance of the self-erecting tower crane.
Design of Modified Minsum Decoder of LDPC Code in the Simplified Difference-Domain
Authors: Wang Zhong Xun , Gao Xing Long
Published: August 2013

In this paper, we propose the modified minsum decoding algorithm of LDPC(Low-Density Parity-Check) code in the simplified difference-domain on the basis of detailed analysis of LDPC decoding algorithm in difference-domain. The simulation indicates that the proposed decoding algorithm offers almost no performance degradation compared with the BP(Belief Propagation) decoding algorithm in log-domain and the decoding algorithm in difference-domain and offers better performance than minsum decoding algorithm in log-domain and greatly reduces the computation complexity in AWGN(Additive White Gaussian Noise) channel and under BPSK(Binary Phase Shift Keying) modulation.
Finite Element Analysis of the Packer at Fracturing
Authors: Li Zhi Miao , Liu Ju Bao , Ding Yu Qi
Published: August 2013

According to the working principle and structural feature of compressive packer, mechanic analysis of rubber tubes was done with adopting Mooney-Rivlin model. The contact stress between rubber tube and the casing and axial compression distance were figured out at 83MPa of the differential pressure between inside and outside string. The results show that the middle tube has the function of beginning to set the paker and the lower tube seals and separate the layers. Upper tubing should be installed the equipment to prevent shoulder protruding.
Design and Implementation of Fixed-Phone Cluster System Based on Modern Communication Technology
Authors: Li Qi Qi , Xiao Ying , Xu Fang Zheng
Published: August 2013

A set of fixed-phone cluster management system was designed based on C&C08 program control unit and next generation network (NGN). C&C08 is responsible for the bottom access and transfer of the fixed-phone calls. Applying the computer telephony integration (CTI) technology we can realize the telephone call management through a computer. Using this system, fixed telephone managers can conduct limitation control for cluster management users information and implement list query of cost easily, so that managers can know the detail cost. In addition, based on the present situation of the telecom business, we designed four telecommunication services for enterprises and institutions, and added them to the fixed-phone cluster management system. For the cluster management users, they can subscribe to those services according to their needs.
The SSL MIMT Attack with DNS Spoofing
Authors: Zhang Ya Lan , Xia Gui Shu
Published: August 2013

SSL protocol is widely used in network security, such as Internet user account, electronic exchange data, etc. The SSLStrip MITM attack exist the problem of processing performance and intrusion detection. Based on the idea of network Phishing, the SSL MITM attack with the DNS spoofing resolved the above mentioned problems. The security of SSL login in daily Internet services was also analyzed, and the improvement and suggestion were provided.
Design and Implementation of a Data Warehouse ETL Tray Program
Authors: Yang Zhi Gang , Sun Li , Yu Xiao Yang
Published: August 2013

This paper presents an ETL system for a data warehouse designed for a PVC profile manufacturing enterprise. The system implements the data extraction, data transformation and load from the data sources of ERP system, CRM system and production line operation data collection system. The ETL requirements are discussed. The system design and implementation methods, including system structure, functions, data processing methods as well as tray program implementation are addressed.
Study of Crown Three-Dimension Model Rebuilding Based on RE Technology and its Laser RP Technology
Authors: Zhang De Qiang , Li Xin
Published: August 2013

Complex geometric model can be reconstructed rapidly and accurately with reverse engineering technology which is an important engineering technology .This paper focuses on the CAD/CAE/CAM integrated technology of crown restorations based on RE technology .To construct satisfied 3D model , the digital model from RE technology is combined with and finite element analysis of CAE. Advanced manufacturing technology is used for manufacturing of resin materials crown. That is laser rapid manufactory technology.
An Implementation of Documents Interoperability Measuring System
Authors: Gao Yu Wei , Hou Xia , Li Ning
Published: August 2013

For the purpose of measuring document interoperability, a Feature Data Model (FDM) of open office document format is proposed to deal with documents. Feature Data is defined as a document container, which contains a number of document features. Each data object in the container meets different document standards and specifications. By using FDM, the instance documents establish the mapping relationships of features between different formats. Then use Feature Data as assistance to measure interoperability and calculate the statistical results automatically. The Documents Interoperability Measuring System (DIMS) mentioned in this paper is implemented by JAVA to prove the feasibility of this model and architecture.
An Integrated Production System Model and Project Plan Restricted Pull-Way Production Control Method for Lean Shipbuilding
Authors: Zong Ming Di , Sun Hou Fang
Published: August 2013

Shipyards are facing challenges when trying to manage their project plan under make to order mode and, at the same time, control their production process in a pull way according to the lean manufacturing principle. A Lean shipbuilding planning and pull-way control integrated system (LSPCIS) model is established, which provides the architecture of realizing the lean principle in planning and production control area for shipbuilding. Then, a Project Plan Restricted Pull-way production control method (PPRP) is introduced where the bottom level is based on pull principle, while under the restriction of receding horizon plan and project plan. The study reveals that even under the make to order production mode of shipbuilding, it is still possible to establish a leanness oriented planning and production Control system, where the receding horizon plan can work as a middle level between the project plan and pull-way production control. The result of a production process simulation is introduced at the end of the paper, to validate the advantage of the PPRP control method comparing with the normal KANBAN control and pure push way of material delivery.
Applications of Interval Theory in the Evaluation and Decision Making of Power System Projects
Authors: Wei Wei , Huang Jian , Luo Feng Zhang , Chen Fang , Bao Hai Long , Yang Jian Lin
Published: August 2013

With the utility deregulation and market operation in China, economic factor is becoming more and more important to the evaluation and decision making of power system projects. As an important characteristic of the electric market, uncertainty is an indispensable part of project evaluation and decision making. Considering that the traditional decision making theories fail to solve the uncertainty problem entirely, this paper applies the interval theory to evaluate and make decision on projects. The interval net present value (INPV) theory is used to conduct economic evaluation, and an interval analytic hierarchy process (IAHP) and interval binary programming based method is proposed to perform project decision-making. Case study has proved the effectiveness of the proposed method.
A Natural BEM on Non-Uniform Grids and its Coupling Method with their Moving Mesh Applications
Authors: Zheng Quan , Guo Xiu Hui
Published: August 2013

For solving Laplace equation in 2D unbounded domains, a natural BEM on non-uniform grid is derived and its convergence theorem is proved. The moving mesh methods for the NBEM and the NBE-FE coupling method are also studied. Numerical results confirm the efficiency of the methods.
Discussion and Improvement of Carburizing Defects
Authors: Liu Yue Ying , Gao Xiu Hua , Li Huan Na
Published: August 2013

mproving of the heat treatment process for carburizing bushing,Using the new charging rack for the bushing to solve the problems about the difference of the carburized layer depth on part surface, hardness uneven after heat treatment. At the same time, the production efficiency is also improved.
Simulation and Realization of Gas and Liquid Special Effect in Hovercraft Sailing Scene
Authors: Song Lei , Bai Xiao Long , Yang Zhuo Yi , Xu Shi Jing
Published: August 2013

In the light of the hovercraft simulation system of complex scene real-time rendering simulation requirements and driving control practical training, the principle of particle system has been introduced, and the hovercraft navigation gas-liquid medium effects simulation framework and a simulation approach based on the fluid particle hovercraft using motion equations and stochastic equation technology system have been put forward. The simulation results are consistent with the fluid shape characteristics, the scope and aerosol spray random motion characteristics, when the air-cushion vehicle is sailing, and can realize the visual effect of aerosol and water spray the hovercraft generated when navigating fast and realistically.
Boom Section's Bionic Design Based on Bamboo
Authors: Xie Fei , Zhang Zhong Peng , Li Xin , Miao Qiang
Published: August 2013

From the similar analysis theory, choose the bamboo as the bionic object for boom section design; based on the microscopic characteristics of the bionic object, the author design the boom section with the idea of multistory steel-plates. Based on ABAQUS Standard solver for finite element analysis, gets the boom’s properties on strength and stiffness. compared with the traditional cross-section, bionic boom is superior on strength. The bionic cross-sectional design idea breaks the traditional ways of crane boom design, optimization, and provides a new reference direction.
Design and Simulation of Measurement and Control System for Silage Cylindrical Baler Based on LabVIEW
Authors: Zhang Li Hua , Li Guang Hui , Zhao Jiang Wei , Li Bin
Published: August 2013

In order to study grasss rotary compression characteristics during round bundle process, measurement and control system for silage cylindrical baler was developed in this paper based on virtual instrument technology. The system was constituted of KM520-B silage cylindrical baler, three-phase asynchronous motor, frequency converter, sensors, data acquisition card, the LabVIEW software platform, and so on. This system can be used to acquire information such as forming chambers rotary compression pressure, motors input torque and motors power consumption. By controlling the motors input rotate speed, this paper studied the motor speed, the grass moisture content and the grass bale densitys influence on compression power consumption, grass bale forming quality and forming chambers rotary compression pressure. At the same time, this paper established simulation equipment using MAX of NI Corporation to check the built measurement and control system. The results proved that the system can well complete the set of functions.
The Application of Visual Attention Mechanism in Road Disaster Identification and early Warning System
Authors: Hua Shu  Yue , Xiao Nan Feng
Published: August 2013

Visual attention mechanism is introduced into the traditional road disaster monitoring and early warning system. In this system, the disaster region is the focus of attention (FOA), which happens to be the object needed to process. Ittis algorithm [1]was used to extract the saliency map, then quickly located the regions which may contain disaster according to saliency. The recognition and early warning of disaster can be completed, quickly. This method was tested snowstorms and rolling stones are simulated, and gave the corresponding experimental results. Experiment results show the correctness and efficiency of introducing visual attention mechanism into road disaster monitor and early warning system. It is of great significance and practical value for reducing the computation and improving real-time performance of the total system.
The Study and Application of High-Voltage Capacitive Equipments On-Line Monitoring System
Authors: Zhang Jun Qiang , Su Zhi Ming , Zhao Tao , Liu Yun Peng
Published: August 2013

In recent years, with the development of the smart grid and high-voltage transmission technology, more and more attention has been paid online monitoring of high-voltage capacitive equipment. This paper developed a high-voltage capacitive equipment on-line monitoring system including hardware and software system. Hardware design takes DSP and precision AD as center including signal acquisition and conditioning unit, software part takes modular design including data processing and data query and acquisition control. The system uses zero flux micro-current sensors to collected signals and uses optical fiber to transmission signal, so, the phase measurement error can be control in and signal synchronous transmission can be guarantee. Field application shows that the system data accurate, reliable, stable operation.
Large-Tonnage Double Rotary Rail Crane Chassis Based on ANSYS Optimization Design and Research
Authors: Wang Yue , Zhang Zhong Peng
Published: August 2013

A new type of 2880 t * m double rotary chassis structure of railway crane was studied by using ANSYS software in this paper. On the basis of the overall modeling, the way of coupling is proposed creatively by taking into account the support cylinder, the chassis and the tradition of the leg, the research reference for the new type of large tonnage double rotary rail crane chassis structure was provided by using APDL language in rotary bearing load when it was carried out on the variable load, and constraints under the support cylinder surfaces move all degrees of freedom. Optimization theory for chassis of various dangerous conditions to make optimization analysis was proposed respectively by using ANSYS software. The problem of localization of double rotary rail crane was solved by checking all conditions after comprehensive round ,which was designed to save material double rotary rail crane chassis structure and taking the eigenvalue buckling analysis method to check the stability of the chassis.
Fuzzy Control Based on Genetic Algorithm to Optimize the Mill Load
Authors: Li Yan Jiao , Wang Jian Min , Zhang Jie
Published: August 2013

Mill load is closely related to production efficiency and energy consumption, the purpose of mill load control is guaranteed to increase the production efficiency under the condition of safe and stable operation of the mill grinding. For ball grinding system has some characteristics of nonlinear, large time delay and time-varying, the conventional control method is hard to achieve good control effect, this paper proposes a optimization method of fuzzy control of mill load based on genetic algorithm. The control rules and membership functions has a great deal of subjectivity and arbitrariness. In order to make up this deficiency, using genetic algorithm better solve the mill load optimization. Make grinding system can safe, stable and efficient operation.
Control System of Sensorless BLDCM Based on F28335
Authors: Zhu Yong , Feng Kai Ping , Wu Yun Fei
Published: August 2013

Brushless DC motor Sensorless control is the future development trend, Based on TI Companys DSP chip TMS320F28335 type of brushless dc motor without position sensor control system designed in this paper, Its basic structure and working principle are introduced. The position detector of the brushless DC motor use back EMF zero-crossing detection method. The test results show that the system has good dynamic and static characteristics, the reliability of the motor running.
Motor Control Application Based on STM32 and PID Control Theory
Authors: Zhao Zhe Tuo
Published: August 2013

This paper introduces a motor control application. In terms of hardware, we design and build the motor control board based on STM32 microcontroller (MCU). In software part, the code loaded in the MCU is designed to apply a feedback control on the motor based on proportional-integral- derivative (PID) control theory and the three loops control of motor. We have achieved the angular displacement and speed control of the DC brushed motor in this application. Thanks to the current loop control of the motor, the controlling performance less sensitive to the external disturbance and the robustness is better compared with the motor controller in current market like LM629. Besides, the maximum current passing through the motor can be set by user in the program, which makes this motor control board more stable and durable.
Design of Cable Main Insulation and Outer Sheath Insulation Online Monitoring System
Authors: Zhang Hao , Yue Ling Ping , Wei Fei Xiang , Gong Hao
Published: August 2013

An online monitoring system of main insulation and outer sheath of power cable is designed in this paper. The system can monitor the insulation of the power cable without change the normal power cable wiring and grid structure. Changes of the main insulation and outer sheath of power cable can be monitor and recorded. Alarm of given when the insulation of the power cable is abnormal. System managers arrange outage maintenance depends on the status of the power cable.
The Development of Electric Propulsion Simulation System for Semi-Submerged Ship
Authors: Gao Hai Bo , Pan Zhi Qiang , Chen Hui , Lin Zhi Guo
Published: August 2013

Taiankou is one of the most advanced semi-submerged ships in the world; it adopted an SSP electric propulsion system and a dynamic positioning technique with high technical content. Wuhan University selected Taiankou as a model ship for which to develop a set of marine electric propulsion simulation system. The paper introduces the composition, structure, functions and key techniques and main characteristics.
Research on the Reactive Power Optimization
Authors: Wang Yan Yan , Li Yan Song
Published: August 2013

The power system is facing line losses, low voltage level and some other issues, this article begin with the point of the reactive power optimization, and through with the improved PSO algorithm, we find a way to reduce the line network loss.
Strength Analysis of Parallel Grooved Drum
Authors: Zhang Qing , Zhao Kun , Xiao Ying Yue , Qin Xian Rong , Sun Yuan Tao , Zhang Li Dong
Published: August 2013

Only the basic wall thickness of drum is taken under consideration in traditional parallel grooved drum strength analysis, which is quite conservative for ignoring the thickness of the groove. So in this paper, it is aimed at comparing the strength simulation results for two drum models with and without the thickness of the groove and analyzing the stress distribution of the drum structure, which provides reference for the structure design and optimization of the drum.
Design and Development of Folded Table Bicycle Based on Solid Edge and ANSYS
Authors: Liu Xu , Wu Tao , Xiang Zhi Qiang , Jia Wen Qi
Published: August 2013

The target of this design is to modify and innovate on the basic original bicycle. It not only can offer all travel requirements, but also can provide a simple table to supply the rest and entertainment. This article will elaborate the bicycle design idea, design scheme, transmission device design, Solid Edge Modeling and stress analysis by ANSYS.
Application of Nanomaterial in Sports and its Safety Research
Authors: Meng Ya Li , Zhu Jun Quan
Published: August 2013

The nanomaterial have been widely used in the stadium, sports turf, track, sports apparel, sports equipment and sports supplements, but nanomaterials may have a negative impact on the cell, lung, liver, kidney and brain tissue, biological safety. So we should pay attention to and strengthen the biological study of nanomaterials when we are making full use of positive effect of nanomaterials in developing sports engineering.
Experimental Design and Mechanics Study on Brain Injury Tolerance under Sagittal Angular Acceleration Based on Shearing Strain Equivalent Coupling Method
Authors: Liu Sheng Xiong , Yin Zhi Yong , Li Kui , Tao Dai Qin , Luo Ya Fang , Ye Cui Lian , Xu Chen , Jiang Qin , Li Shu Ying , Sun Yuan
Published: August 2013

s: Brain impact injury is the leading cause of death in traffic accidents. In this paper, a brain multi-functional rotary impacting platform will first be set up. After this, the living animal brain sagittally rotary impacts will be executed and the injury tolerance will be achieved. Then, the sagittal physical models of animal and human brains will be produced and the four-point markers will be placed widely on the models sagittal sections. In succession, the high-speed camera and the three-dimension infrared motion analysis meter will be used to record the rotary impacting process, the exterior angular acceleration course and the shearing strain data of interior four-point markers. Thus, with the exterior angular acceleration course, the living animals experiments and the experiments based on the animal physical brain model can be coupled equivalently. In the same way, through the maximum shearing strain data of interior four-point markers, the experiments based on the animal physical brain model can be equivalently coupled with the experiments based on the human physical brain model. Finally, according to the comparability in pathology and physiology between animal and human brain tissue, the injury tolerance of human brain under its sagittally rotary impacts can expect to be obtained through the mechanics study.
Prediction for Strength of 3D Braided Composites Based on Helix Geometry Model
Authors: Jiang Li Li , Wei Xi Bin , Liu Xun , Zeng Tao
Published: August 2013

A numerical model capable of calculating the strength of 3D braided composites is developed, based on the micro-structure of 3D four-directional braided composites and the assumption of the braiding yarn with a helix configuration and ellipse cross-section. The strength of 3D braided composites have been predicted through a finite multiphase element method (FMEM). Comparison was conducted for those from the present model and experiment. The results are in good agreements with the experimental results in the previous literature. The influences of braiding angle on the strength are also studied.
The Dispersion Estimation Method for Assembly Stress of Silicone Rubber Foam Pad Based on Extreme Value Distribution
Authors: Wang Fei , Wan Fang Mei
Published: August 2013

The silicone rubber foam is a suitable material used for heat insulation and vibration reduction. Because of dispersion of its mechanical character, it is difficult to quantify the assemble stress in reliability analysis. Based on reduced hyper-foam Ogden Model, the interval of model parameter is obtained through fitting the test data, and the predicted assemble stress distribution is also achieved by Monte-Carlo random simulation method. Then, the regression analysis of predicted data estimated is introduced by the extreme value distribution. The predicted assembly stress distribution described in this paper achieves high confidence by the extreme value distribution. Thus, combined with strain uncertain quantification, the reliability analysis of assemble stress can be performed.
The Research Nonlinear Mechanics for Non-Backlash Output Mechanism of Precision Ball Planetary Drive
Authors: An Zi Jun , Yang Zuo Mei , Duan Li Ying
Published: August 2013

Precision ball planetary drive is mainly composed of non-backlash cycloid ball reduction speed mechanism and non-backlash ball ring groove equal speed output mechanism (NBRGEO mechanism or called W mechanism). The three-dimension contact force is analyzed. The nonlinear mechanics model of NBRGEO mechanism was established. The formulas of contact force and stress were deduced. A numerical example is intended to illustrate the presented method of contact force analysis by using of computer program. Therefore, the contact force and stress distributing characteristics of NBRGEO mechanism is acquired. The research results offer theoretical basis for the design of NBRGEO mechanism of the precision ball planetary drive and the research of other precision planetary transmission.
Effect of Hot Air Reservoir and Insulator Tray in the Development of Vacuum Freeze Drying
Authors: Alhamid Muhammad Idrus , Nasruddin  , Kosasih Engkos A. , Yulianto Muhamad
Published: August 2013

The Objective of this work is to know effect of inserting hot air from reservoir to the process of vacuum freeze drying. Tentacle of jelly fish as sample with constant weight 50 g and placed at insulator and teflon container which isolated, the samples were freeze dried with condition at experiment varying between inserting and without inserting hot air at temperature 27°C and also heating from heat loss condenser. The result of experiment shows that while inserting hot air into vacuum freeze drying make pressure rise in until pressure reach 40 mbar. And this phenomena make material evaporation and this event cant be done in vacuum freeze drying. And when without hot air reservoir the pressure can reach 3.5 mbar and the subimation can be done in this process. Vacuum freeze drying process without hot air reservoir need time 12.5 hours and for vacuum freeze drying with hot air reservoir need time 11 hour to drying 50 g of jelly fish tentacle. For process with insulator tray the material can be done in 22,7 hour with internal freezing. From this experiment can be concluded that for vacuum freeze drying with inserting hot air need more ability of vacuum pump specially in flowrate and ultimate vacuum to keep the chamber pressure below triple point condition.
Transient Modeling of a Lithium Bromide – Water Absorption Chiller
Authors: Li Ang , Loh Wai Soong , Ng Kim Choon
Published: August 2013

This article presents a thermodynamic framework for a lithium bromide – water absorption chiller, in which a transient model is developed to simulate the operation process. Local energy and mass balance within the main components like absorber, regenerator, condenser, evaporator and solution heat exchanger is respected to investigate the behavior of the chiller. Experimental correlations are used to predict heat transfer of the related working fluids. The cooling water is set to typical cooling tower conditions of tropical countries such as Singapore. The coefficient of performance (COP) is evaluated against a range of heat source temperatures from 75oC to 100oC. The results indicate the operation conditions of the chiller at its maximum COP is 95oC to 100oC.
Measurement and Visualization of Large Aero-Optics Wavefront Distortion Field in Wind Tunnel Testing
Authors: Zhang Zheng Yu , Huang Xu Hui , Yin Jiang , Zhao Tao , Zhou Run
Published: August 2013

A method of measuring wavefront distortion field is presented in this paper, which gets the OPD through measuring deviation displacement field induced by the beams from center of camera to the mark points crossing the flow field. The experiments of a trans-aerosphere vehicle model in 2 meter supersonic tunnel have demonstrated that the method of this paper can be used to measure the large field of wavefront distortion, and the structures of wavefront distortion generated by oblique shock waves of the vehicles head and wing are correct. This method is simple and provides a new way to measure and observe aero-optics phenomena.
Second-Order Nonlinear Optical Effect in an Asymmetric Quantum Well
Authors: Yu You Bin
Published: August 2013

The second-order nonlinear optical effect in asymmetric quantum wells is investigated. By using compact density-matrix approach, the analytical expression of the second-order nonlinear optical coefficient is obtained. The results show that the second-order nonlinear optical coefficient increases with the increasing of the asymmetry of quantum well. In addition, the nonlinear optical coefficient which obtained in this asymmetric quantum well is very larger than that obtained in bulk GaAs.
State of the Art of Shape Memory Materials and their Applications
Authors: Mor Maurizio
Published: August 2013

The shape memory effect is associated to the recovering of a previous memorized shape due to an external action, generally a thermic triggering. In this work, we show the state of the art of shape memory materials and their applications especially as actuators and integrated in more complex machines.
The Research on Deep and Narrow Groove Grinded by Diamond Wheel
Authors: Tang Chun Yang , Wu Long , Li Zhi Long , Lu Hua Feng , Yang Hua , Li Qing Qing , Chen Rong Fa
Published: August 2013

The deep narrow groove of the coupling plate and side with WC-CO coating was grinded by diamond wheel with metal bond and vitrified bond. The side of the deep trench flatness error was less than 0.02 mm, the bottom of the tank around the corner radius was less than 0.3mm. The type of porosity, particle sizes, surface roughness were measured by experiments, the data for the selection of the grinding wheel bond varieties. The experimental results show that grinding wheel with vitrified bond was suitable for parts of small coating porosity, fine particle size, surface roughness, and others were suitable for the grinding wheel with metal binder.
Effect of Pulsed Electric Current on the Tensile Properties of DP Type Ultra-High Strength Steel Sheets
Authors: Song Jung Han , Lee J. , Hwang I. , Kim Y.B. , Choi S. , Lee G.A. , Kang M.J.
Published: August 2013

Although ultra-high strength steel (UHSS) sheets with tensile stress above 1.0 GPa have a great attention in the automotive industries for reducing the weight and improving fuel efficiency of auto-body, the poor formability of UHSS sheets is one of the main factors hindering their industrial application. Enhancing the formability is a very important and challenging problem to both automotive and manufacturing engineers. In this study, the electro-plastic effect, which is first discovered in 1960s, of ultra-high strength steel sheets is investigated to improve the formability. To begin with, a test system is built up to carry out the tensile test with heavy electric current flowing through the specimen. The evolutions of the flow stress and the electric resistivity are obtained using this test system. The significant decrease in the flow stress caused by the heavy flowing through current is observed.
Research on Variable Transmission Efficiency of Automobile Transmission Based on the MASTA Software
Authors: Li Li Yun
Published: August 2013

The thesis built the simulation model of automobile variable transmission driving efficiency, and calculated the transmission efficiency by using the MASTA software under different conditions. The simulation results showed that the reverse transmission efficiency is the lowest. With gears forward 1 ~ 4, its transmission efficiency increased gradually, while the fifth gear is overdrive, therefore its transmission efficiency is lower than the fourth direct file. The transmission efficiency of the same gear increases and then decreases with the increase of the torque input. While the range of the transmission efficiency between different speed increases along with the increase of the torque. With the increase of the rotational speed of the gearbox, the transmission efficiency increase gradually, but the increase amplitude reduces gradually. The great method provides some reference for the study of the transmission efficiency.
PID Control Design for a Maglev Train System
Authors: Gilson Fernandes Braga Junior , José Augusto Lima Barreiros
Published: August 2013

This document presents an application of a PID (proportional, integral and derivative) controller designed by the pole placement technique and applied to a Maglev (Magnetic Levitation) train system plant. The linearization with Taylor Series is demonstrated including the development of the formulas to calculate the parameters of the controllers to three operation points and the performance of each controller is tested under disturbances, and switching controllers between the plants for different operating conditions.
The Research of Air Bags Overturning Device Based on Fuzzy Control
Authors: Zhang De Qian , Li Nan , Li Yu
Published: August 2013

The fuzzy control algorithm to work out the fuzzy control rule table and query tables, combined with the Matlab simulation systems established fuzzy to control airbag flip Simulation experimental system, the simulation data obtained through this system, the ultimate combination of the S7-200 programmable controller and force sensorsexperimental hardware system verification of experimental procedures.
Simulation of Characteristics of ZnO/Diamond/Si Surface Acoustic Wave
Authors: Zhou Zhen Kai , Feng Jie
Published: August 2013

Based on the recursive stiffness matrix method, the effective surface permittitivity model of multilayered Surface Acoustic Wave structure was established. By this model the phase velocity dispersive of ZnO/Si layered structure was calculated. The calculation results is in agreement with the experimental results ,which verifies effectiveness and accuracy of the model. Furthermore, the model was also carried out for the determination of the phase velocity and electromechanical coupling coefficients of ZnO/Diamond/Si structure. The best combination of high velocity and high coupling coefficient of the structure was obtained, which provided a good reference for the design of the high performance and high capability Surface Acoustic Wave device.
Research on Target Tracking Based on TLD Algorithm
Authors: Zhang Hai Feng , Pan Xiao Qun
Published: August 2013

This paper introduces the theoretical basis and the framework of improved algorithm of TLD(Tracking-Learning-Detection, TLD) algorithm. Difference between the improved TLD algorithm and traditional algorithm tracking were compared by experiments in the paper. When the improved algorithm has joined the online learning mechanism, it improves the effects of target tracking. Trough the experiments between the improved TLD algorithm and traditional algorithm, it turns out that TLD algorithm has good stability and robustness in target tracking.
The Intersection and its Application for Non-Circular Quadric Curved Surface Based on the Theory of Projective Correspondence
Authors: Cheng Bin , Liu Su , Sun Yu , Zhang Jie
Published: August 2013

Based on the theory of projective correspondence, the principle of affine correspondence and projective correspondence is proposed to resolve the intersection of non-circular quadric curved surface (NCQCS). According to the theory of projective geometry, the intersection that NCQCS intersect with a set of parallel planes is a group of homothetic curves. Taking the homothetic curves as corresponding element, spatial projective correspondence between any two homothetic curves is constructed. Similarly, the intersection that any NCQCS intersected by a set of planes through it axis is a group of similar curves. Taking the similar curves as associated element, spatial affine correspondence between any two similar curves is constructed. The intersection and drawing theory, method, application and technology for the NCQCS provides the theoretical and practice support for the intersection of the NCQCS.
An Improved Simulated Annealing Algorithm and its Application in the Logistics Distribution Center Location Problem
Authors: Li Yue Guang
Published: August 2013

In this paper, according to the characteristics and influence factors of the distribution logistics and distribution center problem, a mathematical model of the distribution center of the LRTWP (Location and Routing with Time Window Problem) was established. An improved simulated annealing algorithm was used to solve the model, the parameter and selection operator in the algorithm is setted reasonably. Simulations and results indicate that the improved simulated annealing algorithm has better feasibility and validity for solving the LRTWP.
A Study on the Free Vibration of the Prestressed Joined Cylindricalspherical Shell Structures
Authors: Yusefzad Mahdi , Nejad Firouz Bakhtiari
Published: August 2013

The free vibration characteristics of the prestressed joined spherical–cylindrical shell with free-free boundary conditions are investigated. The Flügge shell theory and Rayleigh-Ritz energy method are applied in order to analyze the free vibration characteristics of the joined shell. In the modal test, the LMS software is used to calculate mode shapes and natural frequencies of the joined shell structure. The natural frequencies and mode shapes are calculated numerically and they are compared with those of the FEM and modal test to confirm the reliability of the analytical solution. The effects of the shallowness and length of the cylindrical shell to the free vibrational behavior of joined shell structure and the effect of internal pressure on the modal charactristics are investigated.
Numerical Analysis of the Exterior Explosion Effects on the Buildings with Barriers
Authors: Králik Juraj , Baran Michal
Published: August 2013

Generation and transmission of blast waves in real terrains is of major importance for risk analysis procedures involving accidental explosion scenarios. This paper aims to show the approach to addressing air pressure waves from explosions using empirical formulas and compare them with numerical computations, which is solved using the computational program AUTODYN. Simulation of a simple model of the building is presented in the interaction with the air pressure wave caused by the explosion, which is initiated at a distance of 30 meters from the front of the building. The explosion process will be shown in 2D axial plane which is then remapped into Eulerian multi-material 3D space using the interaction of the rigid obstacles. The weight of 1000 kg TNT charge is used, which is located one meter above the ground and represents the explosive placed in a car in accordance with FEMA requirements. The effects of the protection structures are investigated.
3D Dynamic Hydroelasticity Analysis of Light Weight Pyramidal Sandwich Plates with Imperfection Subjected to Water Impact
Authors: Wang Hao , Cheng Yuan Sheng , Liu Jun
Published: August 2013

The aim of this work is to investigate the hydroelastic responses of rectangular, clamped light weight pyramidal sandwich plate structures with imperfection (LWPSPS-IM) subjected to water impact via analytical prediction and numerical simulation. Firstly, the characteristics of impact pressure and structure deformation are computed by using FEM program LS-DYNA based on the proposed 3D multi-physics computational model. Numerical results show that the impact pressure of total fluid-solid interaction (FSI) surface for LWPSPS-IM is lower than that of the perfect LWPSPS. In the theoretical approach, a novel analytical method is proposed to calculate the elastic constants of LWPSPS-IM. Then an engineering estimation model to predict the maximum deformation of LWPSPS-IM is developed, in which the total deformation is divided into two parts, i.e. local field deformation and global field deformation and they are both computed using analytical approach. Good agreement between the numerical results and ones obtained from the proposed analytical model is achieved.
A New Method to Detect Fire and Alarm in Confined Space Based on Electronic Nose
Authors: Wang Xiao Wei , Hu Hai Bing , Qin Jun , Zhang Yong Ming
Published: August 2013

This paper presents a new method to detect fire and alarm in confined space based on electronic nose. Common confined space includes some distribution cabinet, machine room, warehouse, air cargo compartment and spacecraft cabin, etc. Combined with the characteristics of the confined space, a fire detection and alarm system is schematically designed. This system is based on electronic nose and is an aspirated configuration. With this system, this method adopts PNN as the recognition algorithm, and introduces steady status and warning time to the monitoring host. The CO, O2, CO2and temperature are taken into account as the input of the PNN to get the probability of fire. Compared with the normal methods, this method can detect fire more quickly, reduce the false and missing alarm rate and realize real-time online alarming.
Radar Absorbing Material (RAM)
Authors: Ramya K.
Published: August 2013

This paper briefly outlines the research and development activities in radar absorbing materials. Military defense scientists to the possibility of using coating materials to render aircraft or other military vehicles less visible to radar and, preferably, to control such visibility. The highly conducting surface of a metal vehicle is an excellent reflector of radar, but an absorbing layer would suppress the radar signal at the receiver station. Radar absorbing material currently in military and commercial use are typically composed of high concentrations of iron powders in a polymer matrix. These materials are both very heavy and very costly, two key limitations to their adoption for many applications. The performance of these coatings, particularly those using spherical particles, is dependent upon how closely the spheres are packed together. Thus the most efficient coating would be one approaching the density of solid iron with a minimum amount of resin included to electrically insulate the particles from one another. That is, the attenuation efficiency increases faster than the weight, so that a thinner coating with the same attenuation, can be used, providing an overall weight savings. Unfortunately, the particles, when produced, are of non-uniform diameter and not necessarily uniformly round. A window member composed of a transparent resin or inorganic glass with a transparent conducting film such as gold or ITO coated, is used as an electromagnetic wave shield window for stealth aircraft. However, the transparent conducting film, especially ceramic transparent conducting film such as ITO does not deform sufficiently to follow the deformation of the window material. Therefore the transparent conducting film might crack even with relatively little deformation, which can occur during an actual flight.
Signal Structure and Simulation of Compass Satellite Navigation System
Authors: Huang Z. , Yuan H.
Published: August 2013

Due to Chinas compass satellite navigation system which is under development, signals will be designed to obey some constraints and cooperate with other satellite system. Binary offset carrier BOC characterizing good correlation, band sharing and spectral separability is proposed for Compass system. Signal structure and development of Compass system is first analyzed in this paper, and then the principles of several BOC modulations are elaborated. The emphasis is put on a characteristic analysis of power spectral density and autocorrelation function. Further, the frequency spectrum of AltBOC modulation is simulated with Matlab due to B2 signal structure. The simulation results will be instructive meaning for compass phase Ш signal design and engineer implementation.
Path Planning and Replanning for Intelligent Robot Based on Improved Ant Colony Algorithm
Authors: Tang Bi Wei , Zhu Zhan Xia , Fang Qun , Ma Wei Hua
Published: August 2013

The effectiveness of path planning and path replanning for intelligent robot using improved ant colony algorithm is explored in this paper. For the purpose of avoiding falling into local optimum and preventing iterative stagnant, this paper describes a new algorithm named stochastic self-adaptive ant colony algorithm to improve the basic ant colony algorithm. Based on the improved ant colony algorithm, the approaches of path planning and path replanning are presented in this paper. Aiming at improving the speed of the algorithm and simplifying the objective function of traditional path planning, this paper presents a principle of eliminating the path nodes .Finally, some constrast emulators are designed.The simulation results proves that the improved ant colony algorithm has strong adaptability in intelligent robots path path planning and replanning.
The Development of GPS Navigation Systems in Civil Aircraft
Authors: Salih Ahmad Abbas Al-Ameen , Jumaah Fawaz Mohammed , Zhahir Amzari , Gomes Chandima
Published: August 2013

The industry of civil aviation is developing in a fast manner to occupy the increasing needs for a fast, safe and comfortable transportation. To achieve these needs, some effective programs, plans, and systems designs are required. The current reliable aircraft navigation and landing systems have relatively a low level of accuracy especially in aircraft landing stage. The best landing category could be achieved requires a runway visual range up to 50 meters and automatic landing system is not in operation yet all over the world. Aircraft navigates using Radar, Radio and Satellite navigation systems. The Federal Aviation Administration (FAA) plans to replace legacy navigation systems with satellite based navigation technology. Currently, the Global Positioning System (GPS) and its augmentations is the main satellite navigation system used all over the world for air navigation applications. The development of aircraft navigation has been performed with the enhancement of GPS augmentation systems. In this paper, aircraft navigation systems and techniques will be presented in this paper to evaluate the integrity and reliability of each system, and to make a comparison among these systems according to accuracy, integrity and availability.