bluuebunny/crossref_metadata_2025 huggingface dataset:
Research for College Counselors' Work Auxiliary System Based on B/S Architecture
Authors: Wang Hong Jiang , Tao Kai
Published: September 2013

Based on college counselors work as the breakthrough point, this paper was discussed the responsibilities of college counselors and analyzed the present situation of our university counselors. On the basis of practical work of counselors, college counselors work assistant system was designed. Several modules are developed in this system, students are able to finish assignments in their dormitory instead of having to do it in classroom. The online evaluation module is convenient and secure. Administrator can set the item vote as single selection or multiple choice and every student has one chance to vote for any evaluating theme. Thus the accuracy of voting result is ensured, time is saved and efficiency is increased.
Research on Feature Based IC Process Modeling and Clustering
Authors: Feng Jin Feng , Ma Jin , Hu Jie , Peng Ying Hong
Published: September 2013

In order to make effective reuse of existing integrated circuit (IC) process cases, improve design efficiency, robustness of design resolutions and overcome knowledge famine and knowledge orientation problems in design process, a feature based hierarchical framework of knowledge modeling and similarity measurements based knowledge clustering method of IC process cases are proposed. In this paper, IC process cases knowledge is represented into four types: sequential type, textual type, crisp type and interval type. According to knowledge classification, sequential similarity measurement for process sequence knowledge and content similarity measurement for the rest types are listed. Finally, existing IC wafer handling process cases of an IC manufacturing enterprise are employed to verify the proposed methods.
Study on New Energy-Saving Excavator with Synthetic Positive Flow Control System
Authors: Zhang Hong Ji , Yu Peng Fei , Zhang Jian Zhuo
Published: September 2013

A new synthetic pilot pressure positive flow control system used in excavator was proposed in this paper, The mathematical models of this system and the positive control system were established, the transfer functions from the displacements of the regulating pressure springs to the operating cylinder piston, and the rotational angle of the right walking motor were deduced. The output power curves of these two control systems were acquired using AMEsim. The simulation results show that the synthesis pilot pressure positive flow control system is more stable and has higher power utilization rate to the traditional positive control system used in excavator. The new control system provides an new design method of energy-saving excavator control system.
The Construction of Psychology Lessons Planning Platform Based on the SSH
Authors: Wang Ying
Published: September 2013

With the continuous development of education informationization, the network provided teachers with a rich repository of teaching. Determining how to quickly find the required for teaching resources, to achieve efficient and high quality lessons was particularly urgent and important. Taking psychology discipline as application background, this paper put forward the psychology teacher preparation platform based on SSH. According to the requirements of the psychological subject teaching and the integration points between different courses, built management sequence about word, sentence, paragraph, the central idea and the main meaning in teaching material articles, to provide a comprehensive and intuitive for psychology teachers orderly teaching resource database. The platform was mainly composed of six main function modules, such as knowledge structure management module, lesson dictionary management module, system information management module, user information management module, article management module and display management module. It can facilitate the teachers knowledge filtering and sorting of the article, thus generate personalized teaching courseware.
Research on Spatial Cognition Training Based on the Digital Earth
Authors: Wang Hong Wei , Xie Jun , Wang Xiao Juan , Wu He Nan
Published: September 2013

Spatial Cognition ability reflects the level of real-time spatial orientation and situation awareness of pilots during flight, which is one of important factors that determines the level of flight ability. This paper explains the Spatial Cognition principle and training methods, and researches training methods of Spatial Cognition based on the 3D virtual geographic environment of Digital Earth, striving to break through bottleneck of the traditional Spatial Cognition training methods.
Effectiveness Calculation of Multiple Rounds Simultaneous Impact Shooting Method Based on Monte Carlo Method
Authors: Hu Xin Jun , Wang Hang Yu
Published: September 2013

Multiple Rounds Simultaneous Impact shooting method (MRSI) improved the hit projectiles greatly.It will effect the shooting effectiveness of Large Caliber Naval Gun weapon system.Based on the analysis of the priciple of Monte Carlo method,the consistent of shooting errors was given.Then built the configuration rules of aiming points,and given the Optimal configuration.Also the Monte Carlo method was adopt to calculate the shooting effectiveness of Large Caliber Naval Gun weapon system.The simulation results showes that MRSI shooting method could attack the moving targets effectively.
Research of the Integration Model of Coal Heterogeneous Systems
Authors: Zhou Hua Ping , Sun Ke Lei
Published: September 2013

This paper was linked to the requirement of coal mine information construction, firstly, on the basis of heterogeneous data environment of the coal mine to sort out, induction, classification, we established an integrated model from the coal underlying data to the application layer, which includes 4 layers: data acquisition layer, data source layer, intermediate interface layer, application layer. The model focused on the underlying data integration and intermediate interface layer data integration, put forward a design idea, which includes mine underlying data integration based on OPC interface and intermediate interface layer based on virtual database and data warehouse, the intermediate interface layer has 4 layers, they are virtual database sub-layer, the data warehouse sub-layer, meta-database sub-layer and service management sub-layer. The coal comprehensive integrated model provides a unified data access platform for integrated data query, 3D visualization integration, Mine Safety forecast and intelligent decision.
Minimum Normal Cone for Continuous Collision Detection
Authors: Shui Yong , Zheng Jin Jin , Zhou Hong Jun
Published: September 2013

Continuous collision detection (CCD) algorithm is a vital step in virtual reality. This paper describes an efficient self-collision detection algorithm called the minimum normal cone algorithm. The algorithm calculates the parent-normal cone in a new way, which optimizes the two test conditions for the self-collision detection: In the first test condition, we analyze and calculate the relative position between the two child-normal cones, and then a bottom-up technology is used to build the parent-normal cone. Thus the two child normal cones can be surrounded by the parent-normal cone perfectly, and the normal vectors motion range of the parent-triangular mesh can also be closely restricted; In the second test condition, we calculate the normal vectors motion range of the contour projection line, and check whether the projection line is self-colliding or not, to avoid excessive tests between segments. The algorithm has been implemented and tested on two classical models, cloth-ball and N-body model respectively. Experimental results demonstrate that our algorithm can decrease the number of elementary tests by two orders of magnitudes, and significantly improve the performance of the overall CCD algorithm.
Effect of Turbulence Model to Simulation Accuracy of Wind Turbine Blade
Authors: Yuan A. Hui , Li Zhen Zhe , Cheng Tai Hong , Shen Yun De
Published: September 2013

With the heightened concern for renewable energy because of significant energy problems, the interest on wind energy has been greatly increased. In this study, 4 kinds of RANS turbulence models were compared and discussed based on developed analysis model. At first, a numerical model for 1kW wind turbine blade was constructed. In the following step, Spalart-Allmaras, standard k-ε, RNG k-ε and Reynolds Stress turbulence models were candidated for comparison. The analysis results show that standard k-ε or RNG k-ε model is relatively good selection under the condition of considering accuracy and computational effort simultaneously. The developed analysis model and simulation results have made a theoretical basis for improving the simulation accuracy of wind turbine blade with minimum computational effort.
Research on General Data Publish/Subscribe Model Based on DDS
Authors: Ma Xue Jun , Liu Shu Fen
Published: September 2013

Because of the lack of generality, the existing data publish/subscribe systems are mostly used in a particular field. In order to satisfy the general support of interdisciplinary model, proposed a general data publish/subscribe model based on DDS. The model supports the configuration and modification of the underlying data types. Simulation results show that the general data publish/subscribe model based on DDS can be well applied in various types of data publish/subscribe occasions.
The Service Platform for Barrier-Free Special Education Based on Cloud Computing
Authors: Yang Li Ping , Wang Wei , Li Chun Lian
Published: September 2013

Cloud computing is a computing model, computing and storage tasks be assigned to the cloud that be composed of a large number of computers. The cloud computing technology are introduced firstly, then the cloud network platform, the service platform for barrier-free special education and functions are detailed described, lastly the key technology is given, such as TTS technology, Microsoft Speech SDK.
Application of Cleaning Technology in the Remanufacturing for Loader's Axles and Transmission Box Components
Authors: Lu Ru Sheng , Xu Bin , Huang He Ting , Zhang Guo Sheng , Wu Zhi Xin
Published: September 2013

The high-efficiency cleaning is one of the key technologies in the remanufacturing process. It is the premise and guarantee for remanufactured core inspection and machining. It also is an important link to improve quality and reliability of remanufactured products. On the basis of analyzing the structural feature, working conditions and main dirt of worn-out or discarded component of axles and transmission of construction machinery, the remanufacturing cleaning technology is discussed.
Some New Generalized Nonlinear Difference Inequalities and their Application
Authors: Wang Wu Sheng , Lin Yuan Hua , Gao Xue Liang
Published: September 2013

The main objective of this paper is to establish several nonlinear difference inequality, which includes nonlinear functions of u (n) and provide explicit bounds on unknown functions. This inequality given here can be used as tools in the study of difference equations with the initial conditions.
Calculation of Slope Safety Coefficient Based on Newton’s Iteration
Authors: Zhang Qing , Zhang Yan Jun , Yu Zi Wang
Published: September 2013

Sarma method is used to calculate the slope and dam stability of widely used methods, wherein a spreadsheet is typically utilized to solve the safety coefficient. Spreadsheet calculation of safety factor in programming efficiency is significantly low, although some correction methods of Sarma use Newton iterative solution. However, the algorithm is extremely complicated for programming and engineering applications, thus making the work difficult to complete. Based on traditional Sarma method, this work uses defined derivatives in Newton iterative to determine the safety factor and obtain the corresponding derivation formula. Through programming and inputting a random initial value, the iterative solution can provide the slop safety factor. Examples also show that the convergence of iteration is rapid and the iteration can reach its required precise value in 2 to 4 steps. The results obtained using the classic examples of Sarma method are exactly the same. The method for calculating the safety factor of Newton method usage is suitable for people who are familiar with traditional Sarma method. The process is simple, direct, effective, and precise.
Analysis and Improvement of BLP Model for Multi-Level Security Database
Authors: Zhao Hai Yan , Liu Xiang Yang , Zhao Jing
Published: September 2013

In the current multi-level security database system, the BLP model is the most widely used security model. For the problem of data redundancy, primary key loophole and reasoning channel of the BLP model, an improved method is proposed. The proposed method consummates the read-write level and the read-write range of user, increases the audit mechanism, eliminates the primary key loophole and avoids the reasoning channel to some extent. The proposed method in this paper improves the security of the BLP model and makes the security model more practical.
A Constellation Graph Based Approach for Ontology Construction
Authors: Liu Yi Li , Yang Yang
Published: September 2013

The ontology construction methodology frameworks used so far are limited in certain domains lack of mature knowledge hierarchy and require the reference alignments to be specified manually. This paper presents a constellation graph based method to build ontologies including two critical steps: transform the property of the concepts abstracted into the corresponding data; draw a constellation graph based on the data and the classes in the same constellation part constitute a new kind of classes. This approach can facilitate ontology construction process with little human efforts and be more time-saving. A practical example is used to illustrate the performance of this approach.
A Study on Malaysian Food and Beverage Manufacturing SMEs Practices of Pre-Development Process
Authors: Abu Noor Hidayah , Md Deros Baba , Rahman Mohd Nizam Ab , Mansor Mohd Fitri
Published: September 2013

Product innovation is an important driver for organizations to improve their performance. Large-scale organizations have received full attention from many researchers with respect to efficient pre-development implementation and practices compared to small and medium enterprises (SMEs). Therefore, this study was performed with the main objective to identify SMEs practices in pre-development process. A survey questionnaire was developed and was sent to 687 Malaysian food and beverage manufacturing SMEs. Descriptive analysis was carried out to determine respondent profile and rank of eight critical success factors (CSFs) based on its contribution. Tests to investigate any differences between the level of importance and practice among SMEs were conducted using paired samplet-test. The results of the study indicated that Malaysian SMEs are aware of the importance of pre-development practices to improve organizational performance through the successful development of new products. However, several limitations (i.e. financial, work force, knowledge, experience, and technologies) had caused Malaysian SMEs unable to achieve efficiency and effectiveness in the pre-development implementation practice.
Modeling and Analysis of Full Hydraulic Pressure Drive System of the Wheel Loader Based on AMEsim
Authors: Yang Yong , Chen Qian Lin
Published: September 2013

The characteristics of traditional load sensitive system and the control system of electric hydraulic flow matching are introduced comparatively. In order to improve the energy saving and the overall control performance of wheel loader, Electro-hydraulic flow matching control system is adopted. In the meantime, the machine-liquid walking institution in the traditional sense is changed into full hydraulic pressure drive institution by using the module modeling way, which omits the "double" system including the hydraulic torque converter and the transmission constitute, simplifies the chassis structure and improves the flexibility of the machine. Simulation model of the wheel loader of full hydraulic pressure drive is established by the software named AMEsim, which provides reference for the designs and applications of the matching control system of electric hydraulic flow applied to the full hydraulic pressure drive wheel loader.
Numerical Simulation of Laval Nozzle
Authors: Wang Yan Dong , Jia Hong Guang
Published: September 2013

Laval nozzle is the commonly used device in rocket engine and aero engine. this paper, the numerical model is derived. The convergent section subsonic flow and divergent section hypersonic flow are simulated in dimensionless method. Reverting the dimension, the result can be seen that the analytical solution, the CFX simulation solution and the numerical are in uniform.
Agile Supply Chain Performance Evaluation of Automobile Manufacturing Based on Regression Analysis
Authors: Dong Hai , Li Chun Ling
Published: September 2013

Considering the current agile supply chain performance evaluation methods of automobile manufacturing has defects such as low accuracy, complex computing. This paper proposes the agile supply chain performance evaluation of automobile manufacturing based on regression analysis. Firstly, the index system of agile supply chain performance evaluation of automobile manufacturing is established. Secondly, the agile supply chain performance evaluation model is build based on regression analysis. Finally, the feasibility and availability of this model are verified combined with the numerical examples.
Customer Satisfaction Evaluation of Ceramic E-Commerce Platform
Authors: He Fu Bao , Zhang Yi Lai , Guo Tong Jun , Chen Hong
Published: September 2013

Customer satisfaction is an important comprehensive index to evaluate e-commerce platform, and carrying on customer satisfaction evaluation is an important part of the evaluation to e-commerce platform. This paper starts from the customer satisfaction, builds the evaluation index system and the multi-level evaluation mode of ceramic e-commerce platform based on the grey system theory and using the analytic hierarchy process combined with fuzzy comprehensive evaluation, and applies the mode. We can master the influence factors of customer satisfaction and provide guidance to the improvement of the platform through analyzing the evaluation result.
Study on Railway Materials Procurement Online
Authors: Sun Lei , Xing Hong Mei , Zhang Ying
Published: September 2013

As the bullet train, the high-speed train put into service one after another, China's railway transportation construction completed the decades of development in the developed countries within just five years. Railway department material supplies were essential to the rapid development of railway transportation construction. The way of material purchasing bidding online not only save time and cost than that of personnel going to and from the bidding site in the past, but also it can better meet different requirements of railway procurement needs. At the same time, the automatic cohesion of procurement process (bidding, consultation, evaluation, etc. ) guide the bidders to bid timely and accurate.
Research and Practice on Data Analysis Evaluation Technique of Intelligent Teaching-Management Based on D-M Theory
Authors: Jiang Shu Feng , Cui Ying Yu
Published: September 2013

With the wide application of electronic device and network, plenty of data is added to multimedia database. In this paper, our work will expand application area and improve mining efficiency based on the improved data mining algorithm. A better humanization of evaluation (mining) process and results is obtained with the help of D-M strategy. The technique, which is concluded from plenty of data, is mainly divided into 3 steps: data arrangement, regulation searching and regulation presentation. This method reduces the affection of human factors on each evaluation links and saves the human task of management. It makes great sense to the theory research and algorithm improvement by applying digital manipulation to improvement of intelligent teaching-management data analysis evaluation and management tactics.
Recent Advances in Quasi-Zero-Stiffness Vibration Isolation Systems
Authors: Niu Fu , Meng Ling Shuai , Wu Wen Juan , Sun Jing Gong , Su Wei Hua , Meng Guang , Rao Zhu Shi
Published: September 2013

The quasi-zero-stiffness vibration isolation system has witnessed significant development due to the pressing demands for low frequency and ultra-low frequency vibration isolation. In this study, the isolation theory and the characteristic of the quasi-zero-stiffness vibration isolation system are illustrated. Based on its implementation mechanics, a comprehensive assessment of recent advances of the quasi-zero-stiffness vibration isolation system is presented. The future research directions are finally prospected.
Nonlinear Study of Rotor-AMB System Subject to Multi-Parametric Excitations
Authors: Li Lin , Han Yong Jie , Ren Zheng Yi
Published: September 2013

The non-linear response of a rotor supported by active magnetic bearings (AMB) under multi-parametric excitations is investigated. The method of multiple scales is applied to analyze the response of two modes of a rotorAMB system near the primary resonance case. The steady-state response of the system is studied numerically, applying the frequency response function method. It is shown that the system exhibits many typical non-linear behaviors including multiple-valued solutions, jump phenomenon, hardening non-linearity. The effects of the different parameters on the steady state solutions are investigated and discussed.
Research on Vibration Responses of Railway Steel Bridge Considering Welding Residual Stress
Authors: Liu Jia , Zhang Run Chang , Jiang Li , He Zhong Shan , Tan Dong Mei
Published: September 2013

Vibration responses of railway steel bridge considering welding residual stress have been researched. Based on the reasonable heat source model matching the electrical arc welding, the welding residual stress in welding joints of steel bridge has been simulated. Meanwhile, it has been superimposing with the gravity stress and the actual measured dynamical stress of railway steel bridge. Then, acting all actions to the accurate finite element model, the vibration responses of railway steel bridge considering welding residual stress can be analyzed, and the conclusion that the residual stress has a significant contribution to the vibration dynamical stress in welding joints district of railway steel bridge has been obtained.
Study on Balance Simulation of Milling Tool Handle in High Speed Machining
Authors: Xue Yun Na , Xue Li , Su Guo Sheng
Published: September 2013

The balance performance of the tool handle influences the machining quality. Using the tool of the sensitivity analysis, the feasibility analysis and the optimization design in Pro/e software, by reasonably selecting the dimensional parameters of the balance structure, the distance between the center of mass and the rotation axis can be zero in order to achieve the static balance. After the dynamic simulation, the dynamic performance states that the static balance model is not fully dynamic balanced.
Simulation of Heat Stress and Fatigue on Engine Case
Authors: Hou Chang Hui , Fan Hong Li , Sang Qian , Lu Ji Ping
Published: September 2013

In this paper, a model of an engine case is designed in Pro/Engineer for fatigue simulation. The meshing is created by the way of Abaqus. According to the working conditions, the boundary restriction of the simulation is defined. By the simulation, the heat distribution of the engine case is given, the causes of relatively high temperature areas are discussed, and the heat-stress distribution is drawn too. The high stress area in the engine case is discovered. The simulation result shows that the steady working stress is about 60MPa, the transient stress is between 90MPa to 120MPa, and the maximal stress is 136MPa. Based on the heat stress the fatigue life of the engine case is analyzed. The research result is a reference of the engine case safe working.
Dynamic Performance Analysis of a Smart Base Isolation System Based on Magnetorheological Elastomers
Authors: Qiao Zhi , Ding Jian Guo
Published: September 2013

In this paper, we studied a smart base isolation system based on magnetorheological elastomers (MRE), which is a new class of smart materials whose elastic modulus or stiffness can be adjusted by changing the magnitude of the applied magnetic field. The main goals of this study are to demonstrate the use of MREs as field-dependent element in a smart base isolation system and investigate the dynamic performance of the smart base isolation system in mitigating excessive vibrations of the building structure under dynamic loadings. To this end, we designed some MRE samples working in compressive mode and measured their properties under various magnetic fields in which the elastic modulus varied by up to 250%.Compared with the structure installing traditional base isolation system, the dynamic performance of the structure installing smart base isolation system is much better under the dynamic loadings.
Load Distribution of Ball Screw with Contact Angle Variation
Authors: Xu Sheng , Sun Yao Fei , Shen Hong
Published: September 2013

Based on existing analytical models, an improved model was developed to predict load distribution of ball screw more accurately. In this model, variation of contact angle is considered. The results of this model demonstrate that the load distribution of ball screw is not uniform and load distribution curve falls from the position near the load to further. Downward trend is more marked when the variation of contact angle is introduced into the model. The larger ratio of helical pitch to screw diameter is, the worse the nonuniformity of load distribution is. This will impair the stiffness of ball screw. It is found that the calculated results are significant to ball screw design.
A Novel Dynamic Calibration Method for Dynamic Characteristics Testing of Hydrodynamic Journal Bearing
Authors: Li Jun Ning , Chen Wei
Published: September 2013

The traditional dynamic calibration method for dynamic characteristics testing of hydrodynamic journal bearing is difficult to guarantee the consistency of the calibration condition and test condition and is hard to achieve. This method can affect the precision and accuracy of test result directly. So a novel method was put forward to solve this problem in this paper. Its core is to directly adopt the test bearing as the attached mass block to calibrate the test system, and then the frequency response function for each channel of test system under specific conditions can be got based on the related algorithm. Following, the implementation procedure and key technologies of the new method were introduced in detail. Finally, it is shown by an example that the proposed method is feasible.
Binding Force Analysis of Multiple Pairs of Bars Space RCCR Mechanism without Inertia Force
Authors: Zhuang Sen , Cui Chao , Han Bo , Ouyang Kai
Published: September 2013

In close to the rigid body condition,to solve the binding force of multiple pairs of bars space RCCR mechanism,first, starting from solving main binding force of three-pair bars space RCCR mechanism by the theoretical analysis, to have obtained the change law of the main binding force without the inertial force (extremely low speed) by using the computational multibody dynamics software ’COSMOSMotion’ and then summed up the equivalent tangential force through the investigation of the simulation data. Finally the concept of equivalent tangential binding force was expanded to 4, 5, 6 pairs of bars space RCCR mechanism.
Prediction on the Wear Life of Bearings for Planetary Gears
Authors: Zhang Jie , Liao Ying Hua , Huang Bo
Published: September 2013

In this paper, firstly, a dynamic model of planetary gears involving the bearing wear and a model to calculation of the bearing wear capacity will be established. And then the basic flow for prediction on the wear life of bearings for planetary gears will be given by the proposed two models. Finally, the influences of the bearing wear on the bearing wear life will be studied and the methods to improve the bearing wear life will also be discussed. The simulation and analysis results show that with the increase of the limit wear capacity, the bearing wear will experience three periods, such as rapid increasing, steady increasing and constant, and there are also a significant impact of the bearing clearance and stiffness on the bearing wear life.
Study on the Correct of Oil Temperature in Wet DCT Gearshift
Authors: Sun Wei , Ning Zhe , Ma Jin , Liu Guo Qiang
Published: September 2013

In this paper, a dynamics model for DCT shifting process has been built to analyze the clutch hydraulic control system and make the clutch pressure curve with the affection of temperature. Correction for temperature control system reduces the impact degrees and the friction power even solves the "runaway" phenomenon. Experiment achieves the precise working pressure adjustment of the clutch.
Study on Dynamic Simulation of Buffering Mechanism with Liquid Bag
Authors: Zhang Ming , Jiang Rui , Yang Chun , Cao Li
Published: September 2013

The finite element model of buffering mechanism with liquid bag is constructed using finite element software MSC. Patran. The liquid bag is clamped between the inner part and outer part, and the contact relation is modeled by contact method in the finite element software MSC. Dytran. An airbag module in MSC. Dytran is used to simulate the buffering effect of the liquid bag equivalently. Then dynamic simulation results is presented and compared with the experimental results. The validity of the model is verified and contributes to further analyses of liquid bag.
Modal Analysis and Dynamic Test of Steel Slag Vehicle
Authors: Mao Kun Li
Published: September 2013

Steel slag vehicles with tilting arm are advanced equipment used in iron and steel factory for short distance delivery. With great impact force and severe vibration when pouring steel slag, strength of equipment structure must be enough. In product design, theoretical study and simulation of steel slag vehicles were completed using commercial finite element software and dynamics software. Static strength and dynamic tests of some steel slag vehicle were finished using dynamic and static stain instruments, acceleration transducer in order to verify the computer analysis result. The modal analysis result of steel slag vehicle, the field dynamic test procedure and data process are shown in this article. In the end of paper, conclusions are drawn useful for design and manufacture of heavy-duty equipment such as steel slag vehicles.
Characteristic Parameters of Cushion in High-Speed Train (CRH) Contribute to Seat Pressure Distribution Analysis
Authors: Wu Wen Yu , Xue Cheng Qi , Liu Lin Dong
Published: September 2013

Based on the seat cushions in high-speed train, three main characteristic parameters, surface angle, width and height are involved in this simulation experiment analysis. With this CAE method, a standard buttocks model fit to seat cushion is imported, and the study on seat pressure distribution is taken through characteristic parameters of seat cushions related to different concave surfaces using ANSYS’s finite element analysis, and contribute to much flexible and more adjustable feature points, use seat pressure distribution to determine geometric parameter according to maximum pressure points, the result in this work finally satisfy the standard of optimization, and helps to assist reliability design of seats in high speed train.
Low-Wind-Drag Numerical Research on Fenders and Wheels of Car Model
Authors: Hu Xing Jun , Zhu Yun Yun
Published: September 2013

In this paper,a simplified model of the car with low resistance was built and 3D numerical simulations have been finished with two schemes adopted :the rough model and the smooth model of fenders and wheels. The aerodynamic characteristics and the flow field structure of the passenger car model were obtained with CFD, then the affect of the fenders and the wheels to the aerodynamic resistance were analyzed. Seen from the results, minor warping of the fenders and the sharp corner of wheels induce great energy loss, while smooth modeling of these two parts ensures the flow fluent, and decreases the CD value. The aerodynamic characteristics and the results gained from this paper provide theoretical basis for the low-wind-drag car.
Concurrent Engineering in the Application of Automobile Covering Parts Mould Development
Authors: Fu Min , Kong Chui You , Wang Bing Bing , Chen Ming Hang
Published: September 2013

Describe an advanced design and manufacturing technology Concurrent Engineering (CE) and give the automobile covering parts mould development flow basing on concurrent engineering. It tries to consider initially all factors of the mould development life cycle. Take an automobile covering part for example. Basing on the finite element analysis software AUTOFORM, do die design and forming simulation. According to the result of simulation, designer can predict the defect of forming and timely modify the forming process. So in stage of process design taking into account the blank forming, this kind of concurrent design of the mould surface can be directly used to mould design, also won't return after the mold design to modify the die-face design process. So on account of concurrent engineering, it can reduce the changes of automobile covering parts mould design and the number of repeated test, improve quality, reduce cost, and shorten the cycle of mould development.
Simulation of Luffing Mechanism of Lemniscate Type Crane with Boom Driving
Authors: Li Ke Qin , Jiang Cui Xiang
Published: September 2013

Lemniscate type crane is used for water transhipment operation. Lemniscate type crane has some advantages, i.e. lower centre of weight, practical and reasonable structure, strongly anti-wind, upwarp of flying jib invariably and easy operation. Based on ADAMS and MATLAB, the simulation of kinematics of luffing mechanism of lemniscate type crane with boom driving are obtained. Luffing characters of lemniscate type crane are more better and suited to handle materials.
Technology Research on the Fluidization Treatment of High-Titanium Slag to Manufacture Synthetic Rutile
Authors: Li Liang , Zhou Lan Hua
Published: September 2013

Oxidation and reduction of high-titanium slag were conducted in a self-designed fluidized bed. Detailed analyses of the leaching mechanism and kinetics were also performed. The effects of oxidation temperature, oxidation time, reduction temperature, and time on leaching products and on the leaching behavior of impurity were systematically investigated via conditional tests. The optimal conditions of the conditional tests are as follows: oxidation temperature of 1,0001,100°C, oxidation time of 3070 min, reduction temperature of 700800°C, and reduction time of 90150 min. Scanning electronic microscope and X-ray diffract analyses show that the phase structure of the high-titanium slag changed after fluidizing oxidation and reduction, which is when a major phase of the high-titanium slag was changed from pseudobrookite to rutile. The change had an important role on pulverization ratio reduction and on the creation of a new technology route for the use of titanium resource in Panzhihua in manufacturing synthetic rutile.
Numerical Simulation to the Process of Damage Evolution of Defect Cartilage
Authors: Tian Qian Qian , Ye Jin Duo , Li Xue , Wang Xian Kang , Zhang Chun Qiu , Dong Li Min
Published: September 2013

Objective To understand the stresses distribution and process of damage evolution of both matrix and fiber in the defect cartilage under load of compression. The numerical results may provide a reference to both of the design for cartilage alternatives and clinical repair of defect cartilage. Methods The thickness of different layers of cartilage was obtained by a kind of experiment, in which the displacement in different layers zone cartilage under the compression load was obtained by the digital correlation technique. The multi-layer cartilage model with fiber and defect was established by the multi-physics analysis software ANSYS, with the different layers of the cartilage refer to the experimental results. According to the strength condition, the cartilage damage evolution process was simulated by the method of modifying the stiffness of the elements. The influence of the different defect depth to the damage evolution of cartilage was considered in parameter study. Result The simulation results have shown that the stress distribution in matrix was related to the cartilage defect depth. The minimum stress was distributed in the deep areas and below the damage area, stress concentration was located in the both sides of the defect area in the cartilage matrix, and the damaged area developed gradually from surface to deep, the maximum stress located at both sides of defect area. The stress distribution of cartilage fibers related with their location, the compressive stresses are mainly distributed in the middle and deep area, which are greater than those of undamaged. Conclusion In the process of damage evolution, the damaged area gradually developed from the surface to the deep. In the case of defect value of 60%, the maximum equivalent stresses in matrix will be increased in the process of damage evolution; in the case of defect value of 5%, the maximum axial stresses in fibers will be increased in the process of damage evolution.
Finite Element Analysis of the Cylindrical Helical Torsional Spring
Authors: Li Hong Yan , Li Xiu Li
Published: September 2013

Stress of the cylindrical helical torsion spring is researched with finite element method when torsional degree changes. For spring has great resilience, large deformation effect is considered in the simulations. Analysis on the stiffness shows that the model built is credible, although torsional stiffness is not constant for large torsional angle, the strength is enough whose variation trend is consistent with the spring stiffness with different working torsional angle.
Research of the Virtual Prototype of the Balanced Elliptical Motion Shale Shaker
Authors: Zhang Jie
Published: September 2013

The working principle of the balanced elliptical motion shale shake are presented, Based on the way of parametric design with SolidWorks, The crucial technique for establishing the virtual model is discussed, uses the VBA development tools, realizes the cylindrical cams 3D parameterization design method and the step. The example was given to show the virtual design of the balanced elliptical motion shale shake is presented, the method can effectively improve design efficiency, Provide strong support for the launch of new products, which provides a feasible method for design of the balanced elliptical motion shale shake.
The Analytical Modeling and Finite Element Analysis of a Bridge-Type Displacement Amplifier
Authors: Shen Chuan Liang , Dong Jing Shi , Tian Feng Jun
Published: September 2013

The bridge-type displacement amplifier is modeled by the analytical method and finite element method. The analytical relationship between the input displacement and output displacement is established. The analytical model is validated by finite element method. The geometric parameters influence of amplification ratio is studied. The comparison results show that the link length and the link angle influence the amplification ratio dramatically. A small link angle and a large link length is beneficial to the amplification ratio. The finite element method has a more precise simulation results than the analytical method under the circumstance of small link angle and short link length.
The Establishing and Structural Analysis for Torque Shaft of the Shearer Based on Inventor and Algor
Authors: Zhang Jian , Zhang Xiang Xiang , Liu Xiao Ying
Published: September 2013

The torque shaft of shearer cutting part plays a dual-function of torque transmission and overload protection when the Shearer is working. Therefore it is necessary to study the reliability of the torque shaft. First, the parameterized torque shaft model was built on Inventor and simple parametric analysis of the torque shaft was done by its finite element analysis module. The unloading groove depth 5.079mm met the overload protection requirements. Then the model was imported into professional finite element analysis software Algor to verify the results. Linear statics analysis in Algor showed that when unloading groove depth valued 5.479mm the torque shaft would be broken once the shearer overload. The results of the analysis were reliable as no data was lost during the model interaction between Inventor and Algor.
Hazardous Materials Transportation by Road: Fuzzy-Theory-Based Routing Design
Authors: Li Peng Fei , Lang Mao Xiang
Published: September 2013

Firstly, the consequence of the accident was divided into several ranks. Then we can get the risk fund by the fuzzy risk analysis. Secondly, the stochastic number of every route was produced by the computer, and then the risk of every section can be got. Thirdly, the shortest route theory can be used to get the minimum risk routes. The rationality of the model and the feasibility of the algorithm are proved by the computation and analysis of the example.
"Embedding" Updating Strategy Research of Urban Historic District — Taking South Historical District of Nanjing as Example
Authors: Shi Yi , Hu Xin Yu , Yang Jun Yan
Published: September 2013

Spatial fragmentation is the current status of historic districts in China, and also the real situation of south historical district, Nanjing. This paper proposes Embedding " renaissance philosophy, reconstruct industrial and revival cultural from space form, transportation organizations, industry types and cultural activities, in order to achieve the convergence of urban culture and industry. Integration of urban spaces and activities becomes a response which meeting modern urban development and cultural continuity, maintaining economic vitality and popularity, and obtaining a win-win situation in development and protection.
A Research on the Systematic Structure of Green Manufacturing and some Major Problems in its Implementation
Authors: Wang Qi
Published: September 2013

Green manufacturing has been recently viewed as a necessary part of green design which has drawn international attention in view of its close focus on sustainable development. This paper firstly analyzes the concept and idea of green manufacturing, proposing an idea of understanding green manufacturing from the point of resources, environment and product life cycle as a cross-cutting area, then probe the systematic structure and some problems in studying and implementing green manufacturing.
Orthogonal Testing Optimum Design in Radial Electrodynamic Magnetic Bearings
Authors: Tang Shuang Qing , Yang Dong Ya , Bai Qiong Qiong
Published: September 2013

The radial electrodynamic magnetic bearings were optimized with the method of orthogonal testing optimization design . In the period of designing the test , the maximum stiffness of the radial electrodynamic magnetic bearings was selected as performance target, the three main factor , inductance, rotate speed, magnetic flux density were also selected as the independent variables, meanwhile validated the relevant damping factor in each test. An optimal solution for the radial electrodynamic magnetic bearings was gained with the range analysis about the result of each test.
A New Value Stream Mapping Technique Based on Material Flow, Information Flow and Knowledge Flow
Authors: Pan Yu Cheng , Liang Di , Ma Xiang Fei , Wang Hua Dong
Published: September 2013

Compared with the traditional value stream mapping technique which is based on the material flow and information flow, this paper combines the supply chain knowledge flow and the value stream mapping technique to come up with a new value stream mapping model which is based on the material flow, information flow and knowledge flow. Using the new model, this paper analyzes the knowledge flow for the production process of car sets in a company and solves the real problems mainly at the aspect of knowledge flow. Consequently, information barrage is eliminated, line balance is increased by 25.2%, and knowledge flow cycle is shortened by 15.8 days
Research on the Parametric Design of Simple Sofa with RhinoScript
Authors: Wei Lei , Liu Sha , Yuan Yue , Wang Yun Qi
Published: September 2013

In view of sofa product’s features such as demand of great types and inefficient design, the paper presents a method of parametric design on the simple sofa based on RhinoScript. With analysis of simple sofa’s modeling characteristics, the model of simple sofa could be presented by different parameters. Then models of different sizes and appearance styles could be created easily and quickly by inputting different parameters. This method improves the design efficiency and avoids industrial designers’ repeat work. The design process of a kind of simple sofa testified the method and a series of sofa proposals were easily generated.
Research on Formulation Method of Urban Modal Driving Cycles of Regenerative Braking
Authors: Zhang Shu Pei , Huang Xuan , Wang Guo Lin
Published: September 2013

According to the relationship of energy during regenerative braking, a kind of formulation method of modal driving cycles based on the theory of multivariate statistical probability distribution was proposed. The development of modal driving cycles was discussed in detal. Taking Beijing and Tianjin for example, to analyse and process data of Beijing and Tianjin road cycles, urban modal driving cycles of regenerative braking of Beijing and Tianjin was established. The validation results show that, urban modal driving cycles of regenerative braking of Beijing and Tianjin is effective, and it has practical value for the formulation of modal driving cycles of regenerative braking for other cities.
Multi-Directional Squeeze Casting Based on the Uniform Internal Structure of Solidified Body
Authors: Xu Cai Ling
Published: September 2013

It has analyzed that there is no difference between positive and radial pressure of the interior of multi-directional squeeze casting solidified body. The isotropy of pressure makes the consistency of heat exchange coefficient of interface, crystalline growth velocity and plastic deformation, which thereby enables the solidification structure form of multi-directional squeeze casting parts to eliminate the defects of directional difference of single axis squeeze and non-uniformity of density. It has put forward that multi-directional squeeze casting technique shall be adopted for producing high-performance casting parts with uniform structure property and high density.
Design of Porous Restriction Aerostatic Guideway for Form Measuring Instrument
Authors: Li Zhi Qiang , Yu He Chun , Zhao Hui Ying , Zhang Guo Qing , Li Huan Huan
Published: September 2013

This paper proposes a design of aerostatic guideway with the porous restriction for the vertical guideway of form measuring instrument, and analyses the design principle of the guideway.The static and dynamic characteristics of the guideway of different structures were analyzed with the software based on the finite element method, and then the optimum design was obtained by comparing the deformation and natural frequency. Finally the design of the guideway was verified by theoretical calculation and practical test that the accuracy of its various performances fully met the design requirements. The guideway can be widely applied to the form measuring instrument and other precision measuring instruments.