bluuebunny/crossref_metadata_2025 huggingface dataset:
Numerical Simulation of Die Casting for Semi-Solid Aluminium Alloy and its Mould Research
Authors: Huang Yong , Huang Yao , Wu Qiong , Du Xiao Ming , Wang Cheng Zhi
Published: February 2011

With consideration of the viscosity of semi-solid aluminum alloy slurry and the mold filling characteristics in die casting, the die-casting mould for semi-solid aluminum alloy has been designed and manufactured on the basis of the standard samples. The process of mold filling and solidification of semi-solid aluminum alloy in die casting was simulated by using ProCAST software. With combination of simulation results with die casting experimental data, the results indicate that the influence of heating system of the mould and cross section of ingate for the mould on flowing of semi-solid aluminum alloy in mould cavity is important in this work.
Optimization of Turbine Blade’s Cathodes Feeding Routes in Three-Electrode Feeding Electrochemical Machining
Authors: Wang Lei
Published: February 2011

To improve accuracy of turbine blades by electrochemical machining (ECM), a new cathode’s feeding method was studied. The rational optimization rules were proposed. Based on the theory of ECM, the blade’s shape evolution was analysed. The influence of the current efficiency brought by the passivating electrolyte, and flow factors influencing the machining process were also considered. According to the rules the cathode’s feeding route was optimized. By using the three-electrode feeding ECM machine, the cathode’s feeding routes can be varied flexibly.
Design of Vehicle’s Controlling System Used a 4WS Control Method Based on BP Neural Network
Authors: Liu Ya Peng , Tang Yan , Bi Jia Bin
Published: February 2011

In this paper, a 4WS control method based on BP neural network was introduced. It used the BP neural network to simulate the map of vehicle and the nonlinear dynamic characteristics of the tire to avoid large errors that relying on mathematical simulation model of the problem. The 4WS measured data of Tokyo institute of Technology institute of Japan was used and used BP neural network method to identify the nonlinear characteristics of vehicle and tires. System controller’s design is not based on any theoretical method, but on the BP neural network’s self-learning ability. Experimental results show that this method has good controlling characteristics, and it can improve the vehicle’s active safety and manipulating stability effectively.
Study on Order-Flexibility Method
Authors: Song Hai Yan , Liu Zong Min , Liang Li Fu
Published: February 2011

For saving much workload of calculation and avoiding some computation mistakes, order-flexibility method is presented in this paper.
The Preliminary Investigation of Low Grade Zinc Oxide Ore
Authors: Yang Jin Lin , Ma Shao Jian , Wang Gui Fang , Feng Jin Peng , Mo Wei , Su Xiu Juan
Published: February 2011

Flotation is a conventional way for treating low grade metal oxide ore which has some advantages such as high efficiency and low cost. In order to recover the zinc from a low grade complex zinc oxide ore in which the grade of Zn is 13 wt.%, this paper presents a preliminary investigation of this type of ore by flotation method. In the experiments, the effects of different parameters such as grinding fineness, amount of Na2SiO3, amount of Na2S and amount of octadecylamine were investigated in relation to the metal contents of concentrates. The results show that about 35% of initial Zn content was obtained with 70% -200 mesh grinding fineness, 1000g/t Na2SiO3, 2000g/t Na2S and 500g/t octadecylamine. It is clear that the preliminary flotation tests with the ore sample indicated that there was no selectivity in terms of zinc recovery. Almost 65% zinc remained in the tailings and could not be recovered by flotation due to its complicated mineralogical structure. Therefore, application of metallurgical processes is proposed for zinc recovery from the tailings in the following investigations.
Research on TFP of Enterprises in China’s Manufacturing Industry Based on Malmquist Index Approach
Authors: Li Shuang Chen , Gai Shu , Yuan Di
Published: February 2011

This template takes the 30 completely state-owned and the scale above the manufacturing industry professions as the object of study, has surveyed the manufacturing industry entire essential factor productivity index, the technology advancement index and the technology efficiency index with the Malmquist productivity exponential method. The conclusion believed that Manufacturing industry showed continued growth in total factor productivity trends, mainly due to the raising level of technological progress, while the scale efficiency and pure technical efficiency was manifested as decreased.
Driving Force Testing of Lift Mechanism for Green Energy Furniture
Authors: Chen Tien Li , Tsung Tsing Tshih , Yang Liang Yu , Chang Ho
Published: February 2011

The purpose of this study is testing the force of green energy lift mechanism and analyzes its result to get the key technology for green energy (saving force and energy). At first, the green energy lift mechanisms on the market are surveyed, then the mechanism are analyzed in this study. The force balance system of the mechanism is used to save force and energy. The position limitation of saving force and energy for the force balance system will be investigated. Universal testing machine is used to test the driving force by the different loads during the lift mechanism moving downward. The tested results of the driving force will be estimated. The study results show that the loads influence significantly the driving force. The angle between pulley and wire is the key factor of the driving force.
Ultrasound-Enhanced Coagulation Pilot Plant for Micro-Polluted Water of Huaihe River
Authors: Wu Dao Ji , Luo Cong Wei , Zheng Wei Jie , Zhai Xue Dong , Liu Juan Fang
Published: February 2011

The method to remove natural organic matter in water at low tempreture of the status of the Huaihe River water was studied .Through 10t/h in a pilot scale, ultrasound-enhanced coagulation treatment was used to simulate the micro-polluted water. For the role of Ultrasound, different pharmaceutical dosage control、the control of different HRT ,select the optimal HRT and the dosage of drugs. Also investigated whether the design parameters is reasonable. The effectiveness of the tested coagulation was evaluated by measurements of turbidity, CODMn, UV254and NH3-N.Results showed that: when accordance with 10t/h processing load operation, settled water turbidity is high, the removal of organic matter was poor results. However, when accordance with 8t/h processing load operation, PAC dosage of 5.4mg/l were added,The removal efficiency of turbidity, NH3-N, CODMnand UV254were respectively 93.29%, 7.91%, 37% and 41.63%.On this basis, when open Ultrasonic mixer, the CODMnand UV254removal rates were increased by 9.12% and 7.86% compared with conventional treatment (PAC 5.4 mg/L)but had little effect on the removal of ammonia.
Contract Model of Knowledge Trading between Tourism Enterprises
Authors: Zhang Yu Rong
Published: February 2011

With the development of knowledge-based economy,knowledge is increasingly becoming important resource of enterprises to maintain a competitive advantage and sustainable development. In this paper, we pay more attention to the knowledge trading of tourism enterprises, supposing that knowledge buyer (the tourism enterprise which needs knowledge) prefer to trade knowledge with knowledg seller (the tourism enterprise which owns knowledge) through intermediary (intermediary is often the knowledge-service corporate). Finally, the contract model of knowledge trading is construted and analyzed. It is pointed out that on the condition of contract knowledg etrading, the revenue of knowledge buyer and seller will increase if the knowledg service corporate pay more attention to observing the uncertainty factors, and then the revenue of knowledg service corporate is closely related with the factor β*.
Two-Position and Highly-Efficient Clamping Device Based on Lever-Toggle Force Amplifier Driven by Pneumatic Muscle
Authors: Lu Lin , Wang Ming Di , Zhong Kang Min
Published: February 2011

The clean compressed air is taken as power transmission medium in pneumatic clamping devices, and when cutting after clamping the workpiece, the energy are not consumed any more. So it can be said that it is a green clamping technology. However, a low pressure of pneumatic driving makes a lot of pneumatic fixtures too bulky in size.A new innovation design idea of clamping mechanism based on pneumatic muscle and the eternallever-toggle force amplifier is described in this paper, in which the pneumatic muscle is instead of traditional rigid cylinder. The pneumatic muscle has some features such as extremely simple structure, good flexibility, the big ratio of output force and diameter/weight, etc. Thus, this device can get much greater clamping force on the condition of reducing the size and weight of the structure definitely. In addition, using two pneumatic muscles alternately, it can enable the time of processing a workpiece to overlap with the time of unloading another workpiece, and which can improve the production efficiency significantly.
Texture Profile of Gelatin and Tea Polyphenol Mixed Gels
Authors: Wang An Na , Wu Li Gen , Sun Yu Dan , Zhang Yuan Yuan , Xu Xiang Ying , Li Xiu Ling , Wang Jie , Wang Chao , Fu Qin Qin , Jia Lin Lu
Published: February 2011

The effects of different factors including tea polyphenols concentration, gelatin concentration, pH and temperature on the properties of tea polyphenol/gelatin mixed gels were investigated by using texture profile analysis. The results indicated that the factors all had the influences on mixed gel properties, such as hardness, elasticity, cohesiveness, chewiness, resilience, ets.FTIR spectra verified that tea polyphenols mainly interacted with gelatin by the phenolic hydroxyl binded with reactive group of gelatin peptidyl by hydrogen in the formation of gels. Thermal stability were determined to evaluate the properties of the mixed gels by TGA analysis.
Numerical Study on Influence of Joint Characters on Rock Mechanical Parameters
Authors: Feng Yan Feng , Yang Tian Hong , Wei Hua , Gao Hua Guo , Wei Jiu Hong
Published: February 2011

Rock mass is the syntheses composed of kinds of structure and structured surfaces. The joint characters is influencing and controlling the rock mass strength, deformation characteristics and rock mass engineering instability failure in a great degree. Through using the RFPA2D software, which is a kind of material failure process analysis numerical methods based on finite element stress analysis and statistical damage theory, the uniaxial compression tests on numerical model are carried, the impact of the trace length of rock joints and the fault throws on rock mechanics parameters are studied. The results showed that with the gradual increase of trace length,compression strength decreased gradually and its rate of variation getting smaller and smaller, the deformation modulus decreased but the rate of variation larger and larger; with the fault throws increasing, the compression strength first increases and then decreases, when the fault throw is equal to the trace length, the deformation modulus is the largest. When the joint trace length is less than the fault throw, the rate of the deformation modulus is greater than that of trace length, but the deformation modulus was not of regular change.
Comprehensive Evaluation for Undergraduate Teaching Management Level in Institutions of Higher Education
Authors: Sun Wei , Li Yan
Published: February 2011

Today's higher education has been international and universities confront increasingly fierce competition for survival. Therefore, it is significant to evaluate the teachers’ teaching management level for universities and to build the reasonable and fair teaching evaluation system. Based on widely investigating and studying lots of related literature, this article builds the index system which reflects the undergraduate teaching management level of higher education on the characteristic of undergraduate teaching management. This article focuses on the study of teaching quality evaluation of university teachers by the analytic hierarchy process (AHP) and fuzzy comprehensive evaluation. This model have rigorous logical reasoning and mathematical basis, they offer a new method for the teachers’ teaching management evaluation of universities.
Research on Fracture of FRP Reinforced Concrete Beams
Authors: Feng Yan Feng , Yang Tian Hong , Wei Hua , Gu You Fa , Wang Hai Jun
Published: February 2011

With technology of FRP reinforcement concrete beams is applied in domain of the civil engineering, it attracts more and more scholars to study it. The paper studied of the flexural fracture performance of FRP reinforced RC beams, bringing forward how to calculate the flexural failure of FRP reinforced concrete beam, namely: bearing capacity formula about broken FRP and crushed concrete on compression zone, through comparison between calculated values and tests values, it is discovered that the numerical analysis and test result is fitting approximately, it is validated that the formula can well analyze flexural of FRP reinforced RC beams.
Thermal Stress Analysis of a Tubesheet with a Welding Clad
Authors: Li Hui Fang , Qian Cai Fu , Yu Xiao Dong
Published: February 2011

In this paper, numerical simulation was carried out for the tube bundle of a slurry oil steam generator with concentration on the thermal stresses at the tubesheet with or without a welding clad on the tubesheet surface. It is found that as having a larger heat expansion coefficient, thermal expansion of the welding clad is constrained and most areas are in compressive state. But the tensile stresses in the clad are also notable especially at the interface and could break the clad if added by the tensile stresses produced by pressure loadings. Presence of the welding clad causes significant tensile stresses in the base tubesheet. It is possible that the maximum tensile stress comprised by the thermal tensile stress and pressure induced tensile stress will exceed the tensile strength of the material and cause initiation of cracks in the tubesheet.
An Integrated Approach of CAD/CAM for Spatial Cam with Oscillating Cylindrical Rollers
Authors: Lee Jeng Nan , Tsai Ying Chien , Chen Hung Shyong , Kung Huang Kuang
Published: February 2011

In this paper, an integrated approach of CAD/CAM was presented for the spatial cam with oscillating cylindrical rollers. The relationship between the cam profiles and the meshing element’s surface is established by the conjugate surface theory. In the machining process, the cutter location for the rough and the finish machining using cylindrical-end mill is derived. To avoid interference, the principal curvatures and the principal induced normal curvatures between the cam surface and the cutting tool are analyzed. The geometric error was used as a basis for generating appropriate toolpaths. The postprocessor are developed for converting the cutter location file to the five-axis numerical control program. The generated NC program is verified before actual machining through solid cutting simulation. In order to demonstrate the applicability of the presented method, cam profile was cut using a five-axis machine tool with real material.
Finite Element Analysis of Laminating Press Frame
Authors: Zhang Xin Zhou , Wang Shang Bin , Wu Kai , Sun Yu
Published: February 2011

The structural characteristics of a laminating press were analyzed, and the corresponding finite element model was built with some essential simplification. By structural analysis, the distributions of stress and strain were obtained, based on which the rationality of the frame design can be verified. According to the complex structure and loading conditions of the laminating press, four analytical schemes with different models and boundary conditions were adopted, then the results of different analytical schemes were compared, and the causes resulting in the calculation differences were analyzed. The result shows that in analyzing different parts of the laminating press frame, different models and boundary conditions were required.
Numerical Simulation of Unsteady Pressure Field for Mammoth Electric Diving Pump
Authors: Gao Chuan Chang , Liu Xin Yang , Feng Li Jie
Published: February 2011

According to the feather of the many mine shafts extends to the deep, a new high lift head mammoth electric diving pump for drainage was developed. To study the unsteady characteristics that caused by interaction between the impeller and guide vanes, the sliding mesh technology and RNG k −ε Turbulence models was adopted to simulate the unsteady flow in the pump. The pressure distribution characteristics of the relevant section for the impeller, guide vane and return guide vane was obtained by calculation. The unsteady pressure fluctuation characteristic of each monitoring point was analyzed in the electric diving pump. The effective lift head by calculation fits the actual situation, which is greater than the measured lift head and has only 5% relative deviation.
Lightweight Design of Electric Scooter Frame by Finite Element Optimization
Authors: Dong Hong Bo , Zhang Wei
Published: February 2011

To reduce the weight of the electric scooter frame, magnesium alloy is used to replace the steel. At the same time, the frame structure and tube thickness are redesigned by using topology optimization and size optimization respectively. In addition, static analysis and mode analysis of the frame are carried out to realize the application capability and dynamic capability. Compared with the original steel frame, mass of the magnesium alloy frame after optimization has been reduced by 60%, and the natural frequency has been improved greatly. The results show that the strength and the rigidity of the new structure can meet the designed demand.
Compensation Experiment Analysis of Adaptive Optical System in Space Laser Communication
Authors: Zhai Xu Hua , Zhang Hong Tao
Published: February 2011

Fast steering mirrors（FSM） and deformable reflective mirrors (DRM) of adaptive optical systems (AOS) can significantly deduce laser transmitting attenuations caused by atmosphere turbulence in space laser communication systems. In this paper, Strehl ratio (SR) as an important compensating evaluation parameter was used and the compensating errors were also analyzed. The compensating effects of optical wavefront for atmosphere disturbance were put forward when the refractive index structure constants and transverse wind speeds were uniform distributions.
Scroll Profiles Geometric Parameters Optimization Based on CPSO
Authors: Xiao Gen Fu , Liu Guo Ping
Published: February 2011

The parameters are provided by meeting designing requirement and machining technology in traditional design of scroll profiles. This design method is single objective optimization. It is very difficult to get optical design scheme. In fact the design of scroll profiles is a multiple objectives optimization problem. In this paper a cost function is designed. It can guarantee not only lower friction loss power and leakage loss power but also higher efficiency. In a practical example, scroll profiles optimization was realized based on CPSO. The outcomes show this method is good enough and can be applied popularly.
Design of 4-Axis Reconfigurable CNC Machine Tool for Relief Grinding Sphere Gear Hob
Authors: Hu Zhan Qi , Li Yu Kun
Published: February 2011

a new 4-axis machine tool, which is used to relief grind sphere gear hob including spherical hob, elliptic hob and arc surface hob, is developed. The principle of machining of spherical hob is introduced first. Transmitting system, numerical system and some key techniques are then introduced. The machine tool can be reconfigured when machining of arc worms and spatial cams beside of machining spherical hob. Four forms of the machine tool for machining different workpiece are also introduced.
Using Software Engineering to Guide Commercial CAD Software Secondary Development
Authors: Wang Cheng , Yang Bao Kun , Yang Xiong Wei , Yan Gui Rong
Published: February 2011

Effective secondary development is the key process for CAD application. But as a cross-disciplinary problem and new software development mode, secondary development based on commercial CAD software has new features compared with complete independent software development. From angle of software engineering, this paper summarizes demand of software engineering, standards to observe, software development flow, configuration of development team in the process of commercial CAD software secondary development. Finally, this paper presents the case of secondary development of AutoCAD standard base parametric system to illustrate the specific application of software engineering in detail.
Exploration of Optimizing Processing Technic Based on HS-WEDM
Authors: Liu Jian Wei , Liu Xin Yu
Published: February 2011

Combining the present condition of HS-WEDM technology, paper puts forward four projects to optimize machine, which involves optimization of the main body of machine, improvement of workpiece process, making better control system and updating additional function. It also analyses all kinds of technical parameters in detail to improve the working specifications. The result shows that the application of HS-WEDM can narrow the gap with developed countries of WEDM and satisfy the market demand.
The Design and Application of the Localization Sensor Based on the CCD Image
Authors: Liu Jun Li , Zhang An Chao , Yan Yan Yan
Published: February 2011

When the large equipments and structures are installed, the flange joint type is one quick way. But how to make the two flanges concentric is one difficult problem. In the paper, a localization sensor and an auxiliary equipment is designed to make the two flanges automatic alignment based on the method of detecting the center of a half-baked circle.
Cloud Manufacturing
Authors: Tao Fei , Cheng Ying , Zhang Lin , Luo Yong Liang , Ren Lei
Published: February 2011

The concept of cloud manufacturing (CMfg) is discussed, as well as its core enabling technologies. A seven-phases running mode for CMfg was proposed, and the related inputs, enabling technologies and tools, knowledge and algorithm repositories, and intermediate products and results for each phase are described in detail. Two kinds of CMfg service platforms, i.e., private and public CMfg service platforms are analyzed.
Study on Fault Tolerance for Virtualization-Based Computer Simulation Systems
Authors: Ren Lei , Luo Yong Liang , Zhang Ya Bin
Published: February 2011

Modern computer simulation system has developed towards the direction of large-scale and distributed computing pattern. The large-scale simulation applications always deploy over heterogeneous networks across geographically dispersed locations, and the simulation process often lasts for a long time without intermission. The challenge is that various errors cannot be avoided during a long continuous running time in such a broad network environment with a huge number of simulation resources. The problem of simulation fault tolerance has become a hot issue. This paper introduces live migration method to virtualization-based computer simulation system, handling reliability problems, especially fault tolerance issues. The paper presents a framework of simulation fault tolerance. Then the detailed live migration mechanism of run-time simulation is discussed. The method can provide an approach to consolidating the reliable simulation in distributed and long-term simulation applications.
Shear Mode ZnO Thin Film Applied in FBAR Sensor
Authors: Cheng Chien Chuan , Lin Re Ching , Chang Wei Tsai , Chen Ying Chung , Kao Kuo Sheng , Ou Sin Liang
Published: February 2011

In this study, platinum (Pt) and zinc oxide (ZnO) had been adopted as electrode and piezoelectric layer of an FBAR sensor. Based on the off-axis deposition of the ZnO film, longitude and shear modes resonance phenomenon can be approached to sensitive in air and liquid respectively. The preferred orientation and crystal properties of the ZnO film were evaluated by X-ray diffraction (XRD) using a SHIMADZU XRD-6000 with Cu Kαradiation. The crosssections of the grain structures of ZnO films were observed by scanning electron microscopy (SEM) (Philips XL40 FESEM). The electrical resistance of the bottom electrode was measured using the van der Pauw four-point probe method. The HP8720 network analyzer and CASCADE probe station (RHM-06/V + GSG 150) were used to measure the frequency responses of FBAR devices. The result of FBAR frequency response in liquid, the quality factor of longitude mode is decayed apparent and shear mode is kept high value. The Pt electrode of FBAR sensor has to withstand attack of acid/alkali solution.
Dynamic Evaluation Model of Enterprise Informatization Level and its Application
Authors: Qian Wu Yong , Dang Yao Guo , Lin Chen Yu
Published: February 2011

The existing evaluation models of enterprise informatization level are mostly static evaluation model. And they can’t meet the need of dynamic evaluation of enterprise informatization level. According to the principle of priority information, this paper proposes a new method to determine time series weights based on matrix norm. By using the driving principle of the difference, this paper gives a determination of index weights. And based on time series weights and determination of index weights, the paper establishes a dynamic evaluation model of enterprise informatization level, and gives the calculation steps. Through the case study, this paper tests the validity of the model.
Models and Simulations of the UV Lithography Process Based on Thick Photoresists
Authors: Zhou Zai Fa , Huang Qin Gan , Li Wei Hua
Published: February 2011

This paper presents the models for the ultraviolet (UV) lithography of thick photoresists such as thick SU-8. Simulations for various lithography conditions have been conducted using these models based on the improved dynamical cellular automata method. Some experiments on SU-8 2075 layers under UV source with 365nm wavelength have been implemented to verify the simulation results. The results confirm the validity of the proposed models.
Product Design for PRO/E-Based Master Part
Authors: Feng Fang , Hu Guo Jun , Pan Hui
Published: February 2011

This paper puts forward the top-down design of parts and products by using PRO/E-Based master part. This method can accord with requirements of customers in time, change the traditional working mode, thus, improving the design efficiency.
Process–Oriented Software Development Based on HPN Business Process Model
Authors: Yun Guo Xing , Zhang Jie
Published: February 2011

In order to develop the process-oriented software, we put forward hierarchical colored Petri net (HCPN) to model business process. This approach consists of hierarchical decomposition graph, detailed process graph. Furthermore, the concept of business process components (BPCs) is proposed to facility the business process modeling. The software components, which are constructs of the information system, can be derived by means of the mapping from the relevant business process components. The development of business process-oriented application will be more convenient and rapid based on component library. Such an application becomes more flexible to the changing environment.
Research on Computer-Aided Conceptual Design of Palletizing Robot
Authors: Li Zhong Ming , Liu Wei
Published: February 2011

The method of computer-aided design oriented to requirement configuration is present for the palletizing robot. Index of design requirement is quantified hierarchically. The whole function of palletizing robot is decomposed according to the working plane. The various kinds of attributes of function carriers are digitized and the consistency is kept with the index of design requirement. Optimal design scheme can be gotten by the computation of evaluation function constructed in this paper. The software of computer-aided conceptual design for palletizing robot is developed.
Reverse Engineering in the Design of a Plastic Part
Authors: Sun Chun Hua , Wei Zhu , Yang Li Li
Published: February 2011

Reverse engineering has been widely recognized as a central step in a product cycle of designing and manufacturing. However, major problems with current reverse engineering technology are the inefficient surface reconstruction process, lack of digitizing accuracy control in the data digitization process, and bottlenecks resulted from huge amounts of digitized surface points in the surface modeling process. Moreover, under this limitation, modern concurrent engineering concepts are difficult to be applied to obtain optimal product process. This paper presents a case study on the reverse designing of a plastic part. The study applies a developed reverse engineering approach to reconstruct surface--a series of advanced algorithms, including segmentation, simplification, extraction, fitting curves and reconstruction surface. Two orthogonal curves, which are fitted from the digitized points, are taken as base curves of a ruled surface patch. All surface patches are merged into a whole surface by trimming and chamfering. A CAD model is constructed based on the whole surface. The approach integrates surface digitizing and modeling processes of a plastic part into surface reconstruction process. Using the approach, accurate product CAD model can be efficiently generated and the product design cycle of plastic parts can be successfully linked.
Design of Data Acquisition System in MES Based on RFID
Authors: Li Xue Jun , Wang Peng , Huang Xin
Published: February 2011

Manufacturing execution system is the link in the process of enterprise implementation information integration.The application of Radio Frequency Identification technology is important to implement the data collection function of MES. Speculation against the low efficiency, poor in real time, and low security function for data acquisition in a motor manufacturer, established data acquisition system in MES based on RFID,discussed the data collection process, designed structure of the system in detail，analyzed the function requirements,provide anti-collision algorithm to avoid data collection of the label which may be used in the system implementation,finally discussed the principle of coding.
Study of Process Planning Based on Machining Feature
Authors: Tian Jian Ping , Fu Chun Hua , Tang Ai Hua , Mi Chang Fu
Published: February 2011

Aiming at the requirements of CAD/CAPP data and function integration, adopted modeling based on feature, the part model design is accomplished through calling standard features in the feature database or user defined feature (UDF). The design feature model is reconstructed into a machining feature model through mapping rules. The information of machining geometric and machining properties is packaged in machining feature. CAD model does not provide all the information necessary for process planning, such as the materials information and the accuracy information. These must be provided manually. All information establishes reference of the shape feature. The machining feature, the processing method and manufacturing resources are correlated through establishing decision rules of process knowledge stored in a knowledge base, to realize the automatic generation of feature-based machining procedures and operations. A process-planning tree is constructed through matching the feature process tree with a typical process template, to realize the automatic generation of the part process route. A complete process document can be obtained by manually editing the automatically generated processing route. The feasibility of the method is verified by a prototype system developed in Pro/E environment.
Numerical Simulation on Aerodynamics of Ramjet Projectiles
Authors: Zhang Jia Xian , Wang Yan Na , Liu Rui Min
Published: February 2011

Three-dimensional Reynolds-averaged Navier-Stokes simulations have been performed to explore the aerodynamic characteristics of ramjet projectiles. The turbulence model used is the RNG k-ε model. The numerical algorithms termed total variational diminishing (TVD) was adopted. The complex wave structures of ramjet projectiles with different architecture at different inflow Mach number were achieved by numerical simulation. The influence of inflow Mach number on aerodynamic characteristics and pressure center of ramjet projectiles were analyzed. Results show that lift coefficient and pressure center increase with the argument of inflow Mach number. Ramjet projectiles with different architecture have different drag coefficient trend.
A Novel Extremity Balance System-Design and Manufacturing
Authors: Chen June Wen , Hsieh Hao Sheng , Chen Yi Hsien , Wu Shih Jui , Chiu Li An
Published: February 2011

Integrating the Hall sensors to the extremity balance system of exercise and rehabilitation bicycles was developed and examined in detail. We have accomplished and manufactured a complete system which is user friendly, multi-functional, highly stabilized and inexpensive.
Research on SVG-Based Web-To-VDP
Authors: Yang Sheng Wei , Liu Zhen , Mao Zhi Juan
Published: February 2011

Based on the analysis of the existing VDP document making process and VDP page description formats, this paper proposes a SVG based web-to-VDP technology, design and implements the web-to-VDP systems architecture and resource database.
Statistical Process Control Based on Kalman Filter in Manufacturing Process
Authors: Wang Pei , Zhang Ding Hua , Li Shan , Wang Ming Wei , Chen Bing
Published: February 2011

In order to reduce the impact of data noise to quality control and make monitor results more precise in manufacturing process, the method of statistical process control based on Kalman filter was proposed. In this method, the statistical process control model based on Kalman filter was built and the quality control method of exponentially weighted moving average based on Kalman filter was put forward. While monitoring manufacturing process, first the technology of Kalman filter was used to smooth data and to reduce noise, and then control charts were built by the method of exponentially weighted moving average to monitor quality. Finally, the performance of the exponentially weighted moving average method based on Kalman filter and the tranditional exponentially weighted moving average method was compared. The performance result illustrates the feasibility and validity of the proposed quality monitor method.
A Study on the Digital Simulation for Sheet Metal CNC Incremental Forming Based on Z-Map
Authors: Zhu Hu , Liu Zhi Jun , Kang Jaegwan
Published: February 2011

A method of the digital simulation for the sheet metal CNC incremental forming was proposed based on the Z-map model. The tool extrusion movements were divided into two types according to the principle of sheet metal CNC incremental forming, i.e. vertical movement and horizontal movement. The vertical and horizontal swept volumes of the tool were built to intersect with the Z-map model of sheet metal respectively and the simulation models were generated. The thickness of deformed sheet metal was predicted and the thickness distribution chart was generated. The case studies show that the method can be applied to NC code verification, forming parameters optimization and formability prediction, moreover the system runs stably and reliably in the whole simulation process.
The Evaluation in Weapon Operational Effectiveness Base on Fuzzy Analytic Hierarchy Process
Authors: Zhao Yun Peng , Li Nan
Published: February 2011

weapon system is a complex system, there are many fuzzy or uncertain factors that have led the operational effectiveness of the weapon itself is certain ambiguity. The traditional assessment methods can not deal with this problem, that will inevitably lead the assessment results having some certain risk. FAHP is a method which can decompose of the complex ambiguity with a series of fuzzy factors, then determine the relative importance of various factors in levels by pair-wise comparison, finally determine the Sequence of the relative importance of various factors. This paper introduced FAHP into the comparison of operational of several weapons, and be able to reduce the risk of the evaluation results.
Study of Fuzzy Control for Intelligent Cantilever Beam Based on Genetic Algorithm
Authors: Zhang Jing Jun , Guo Xiao Pin , He Li Li , Gao Rui Zhen
Published: February 2011

The design of fuzzy controller is the key of fuzzy control system, while the core of fuzzy controller design lies in fuzzy rules, whose performance determines the control effect of fuzzy system. General fuzzy rules are obtained from expert experience, in which much subjectivity exists. In this paper, a fuzzy controller is designed by taking an intelligent cantilever beam as the research object. And a method using the genetic algorithm to optimize fuzzy rules is proposed and the genetic coding as well as the fitness function is confirmed. Finally, the simulation model of intelligent cantilever beam is built by Matlab/Simulink, and the vibration control effects of fuzzy controller optimized by genetic algorithm are compared with those un-optimized. The simulation results indicate that the vibration amplitude of intelligent cantilever beam has a significant decrease and the vibration decay rate has a significant increase after the fuzzy rules optimized.
Molecular Cloning and Phylogenetic Analysis of the Duck Enteritis Virus UL55 Gene
Authors: Wu Ying , Cheng An Chun , Wang Ming Shu , Zhu De Kang , Chen Xiao Yue
Published: February 2011

A 561-bp complete open reading frame of the duck enteritis virus(DEV) UL55 gene (GenBank accession No EU071034) was isolated in our laboratory and amplified by common PCR using a pair of specific primers .PCR product containing this ORF was cloned into the vector of PMD18-T. Four evolutionary analysis approaches were used to construct phylogenetic trees of DEV in relation to herpesviruses based on the nucleotide sequences. Bootstrap was used as statistic method to testify the reliablity of the constructed phylogenetic tree. Phylogenetic trees indicated that DEV and other herpesviruses generated from one ancestor and DEV were grouped into the subfamily Alphaherpesvirinae. In our result, DEV showed a close relationship with the genus Mardivirus, but formed a single branch. Partial genomic organization and phylogenetic analysis in the present study provides evidence that DEV was a member of the subfamily Alphaherpesvirinae and should be assigned as an individual genus or group.
Dynamic Expansion Problems on Symmetrical Mode III Interface Crack
Authors: Lü Nian Chun , Cheng Yun Hong , Wang Yun Tao
Published: February 2011

By means of the complex variable functions, dynamic expension problems on symmetrical mode Ⅲ interface crack were researched. The problems considered can be very facilely transformed into Riemann-Hilbert problem by the measures of self-similar functions, and the general expressions of analytical solutions for the edges of mode Ⅲ symmetrical interface crack subjected to motive variable loadings Px2/t3 and Pt4/x3 were obtained by means of self-similar functions, respectively. After those solutions were utilized by superposition theorem, the solutions of arbitrary complex problems could be readily attained.
Effects of Sintering Temperature on Bending Property of Cf/SiC Brake Material
Authors: He Bo Lin , Yu Ying Xia , Sun Jia , Liu Jing , Shi Jian Ping
Published: February 2011

With increasing of the speed of the train, the requirement of the performance of the braking friction materials is more and more higher. It is urgent to find new braking materials to satisfy the rigorous using environment. Cf/SiC has the broad application prospects when it is used as a new kind of braking material. On this article, in order to shorten preparation cycle and reduced production costs, short carbon fiber is substituted continuous carbon fiber felt. Cf/SiC brake materials were prepared by the way of molding compression-pressureless sintering with resin binder at 1800°C, 1850°C and 1900°C, respectively. The effect of sintering temperature on bending property of brake material was researched. The experimental results show that with the increase of sintering temperature, the bending strength of Cf/SiC brake materials rose first and then fell. If sintering temperature is too high, which will lead the crystal grain to grow up and the crack is easy to produce. Finally make the bending strength of composites reduced. When sintering at 1850°C, the bending strength of the specimen reached maximum. At the same experimental condition, the bending strength of Cf/SiC brake material sintered at 1850°C is 18.81MPa, compared to the sample sintered at 1800°C and 1900°C, the bending strength of the specimen is increased 14.56% and 5.26%, respectively. The toughening mechanism of carbon fiber debonding and fiber pull were generated in the process of bending fracture. The fracture model of composites is pseudo-ductile type.
Dielectric Properties of La, Sm Ion-Doped BST-Based Ceramics
Authors: Zheng Zhan Shen , Hu Hong Kui , Li Rui Jiao , Yan Pei Qi , Li Yuan Liang , Xu Lei
Published: February 2011

It is important to develop a new special material to meet the requirement of advanced industry. The BST (Ba0.8Sr0.2TiO3) ceramics doped La2O3 and Sm2O3 was fabricated by the conventional method, and was tested by X-ray diffraction (XRD), Complex Impedance Testing Instrument, LCR Tester with temperature controlling systems. The results indicate that dielectric property of BST-based ceramics doped 0.05 mol% La2O3 and 0.2 mol% Sm2O3 simultaneously is the best, and Sm2O3 had applications of removing Tc of matrix material to a low temperature and making peak wider. The calcining temperature of samples was 1280 °C.
Interfacial Stability of a Spark Plasma Sintered Mo-Ti3SiC2 Layered Composite
Authors: Ngai Tung Wai Leo , Zheng Wei , Hu Chang Xu , Xie Heng , Li Yuan Yuan
Published: February 2011

Mo-Ti3SiC2layered composite was successfully prepared by spark plasma sintering at 1573 K for 20 min under a pressure of 50 MPa in vacuum. The Mo and Ti3SiC2layers were metallurgically bound together without noticeable superficial defects and micro-cracks at the interface. The fabricated Mo-Ti3SiC2layered composite was annealed at 1273 K under vacuum for 5, 10, 20 and 40 h to study the composite’s thermal stability. Three intermediate layers, Mo2C, MoSi2and Ti5Si3Cx, were formed at the interface. Experimental results showed that the Mo-Ti3SiC2layered composite prepared in this study has good interfacial stability at elevated temperature.
The Research of Large-Diameter & Energy-Saving More Medium Supplied Gravity-Fed Three-Product Heavy Medium Cyclone
Authors: Huo Ping , Zhang Li Qiang , Jia Jing Bo
Published: February 2011

The characteristics and the development restrict factors in large-diameter area of the traditional three-product heavy medium cyclone are described. The paper mainly describes the structure and principles of large-diameter & energy-saving more medium supplied gravity-fed three-product heavy medium cyclone. The simulation analysis of this cyclone (DWP type) is presented. The results show that this type of more medium supplied cyclone is better than the one medium supplied cyclone for it has a faster separation speed, high processing ability and better separation efficiency. The applications in field of the 3SNWX1500/1100-Ⅳ type cyclone which using the new technology indicated that there have energy-saving, a high output, a stable separation efficiency, a high precision and a significant economic benefits.
Analyse of the Automatic Leveling System of Parallel Support Mechanism Based on Screw Theory
Authors: Chen De Hai , Xiao Fan , Zhu Da Chang , Gu Qi Hua
Published: February 2011

Analyse of automatic leveling system parallel support mechanism by the screw theory .Using software of Adams to analysis the mechanism kinematics and dynamics. Analyse the kinetic characteristics to verify whether it can meet the automatic leveling system dynamics and kinematics of the requirements.
The Deployment of Business Platform Based on WSS
Authors: Ren Zhi Jun
Published: February 2011

Business platform used by an enterprise is an powerful tool to improve rapidly the business process and meet well the busines needs.Based on windows sharepoint services (WSS) 3.0, the paper has given a solution of business platform , has certain innovation, higher theoretical significance and practical value. This paper mainly researches how to deploy a business platform based on WSS.
Multi-Factor Fuzzy Time Series Model Based on Stock Volatility for Forecasting Taiwan Stock Index
Authors: Cheng Ching Hsue , Liu Jing Wei , Lin Tzu Hsuan
Published: February 2011

Fuzzy time series have in recent years drawn many scholars' attention due to their ability can handle the time series data with incomplete, imprecise and ambiguous pattern. However, most traditional time series models employed only single variable (stock index) in forecasting, yet ignored some factors that would also affect the stock volatility. Therefore, this paper proposes a novel forecasting model using multi-factor fuzzy time series model to forecast TAIEX (Taiwan Stock Exchange Capitalization Weighted Stock index). Multi-factor fuzzy time series model is composed of three main components: stock index, trading volume and interactions between two stock markets. In order to evaluate the performance of the proposed model, the transaction records of TAIEX (Taiwan Stock Exchange Capitalization Weighted Stock index) and NASDAQ(National Association of Securities Dealers Automated Quotations) from 2000/01/04 to 2003/12/31 are used as experimental dataset and the root mean square error (RMSE) as evaluation criterion. The results show that the proposed model outperforms the listing models in accuracy for forecasting Taiwan stock market.
The Study of the First Principle for Layer of Si/Ge
Authors: Zhang Min Gang , Lu Yuan Kun , Liu Wen Feng
Published: February 2011

Using the plane-wave ultrasoft pseudopotential method and generalized gradient approximation which based on the first-principles density functional theory, the bond length, energy band structure and density of states of the layer of Si/Ge were calculated. The results show that, compared with the single-crystal Si layers, Si-Ge bond length get longer and the population decrease in the layer of Si/Ge . It can be seen from the energy band structure that the band structure width of the layer of Si/Ge decreases. The optical properties calculations show that, compared with the single-crystal Si layers, the absorption band of the layer of Si/Ge get narrower, and the absorption band-edge obviously get red-shift.
Robust Tracking Control for a Class of Nonlinear Systems with L∞_Bouned Disturbance
Authors: Guo Peng , Hu Hui , Liu Cheng
Published: February 2011

In the paper, a robust tracking controller is presented for a class of SISO affine nonlinear systems with unknown mismatched uncertainties and external disturbance in input channel.The designed controller has simple structure and concrete expression and include no Lyapunov function. So the proposed controller is easy to compute and complement.The practical stability of output tracking error and the states of the corresponding closed-loop system are demonstrated by Lyapunov stability theorem.Simulation results are presented throughout the paper to complement the theoretical developments.
A New Method of Characterization on Microstructure of Casting Alloy
Authors: Liu Zheng , Liu Xiao Mei
Published: February 2011

Microstructural characteristics of A356 alloy prepared by low superheat pouring were researched, and the fractal dimensions of morphology of primary phase in the alloy was calculated. The results indicated that morphology of primary phase in A356 alloy belonged to fractal structure, and the microstructural characteristics in the alloy can be characterized by fractal dimension. There were the different fractal dimensions for the morphology of primary phase prepared by the different process.