bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on the Installed Position of the Cutting Device of a Small-Scale Sugarcane Harvester Using Virtual Prototype Technology
Authors: Zhou Jing Hui , Li Shang Ping , Lai Xi
Published: February 2011

The size of small-scale sugarcane harvester is decided by installation position of the cutting device of it. In this paper , Several simulation experiments were made by established a virtual prototype of sugarcane cutting system, and the relationship between the effect of holding sugarcane(measured by angle) and the installed position of cutting disk with different forward speed and different rotational speed was researched, and propose that the rotation speed of sugarcane holding device and forward speed of harvester influence the installed position of the cutting device by analyzing the data from virtual experiment. At last, a empirical regression equation which indicate the relationship among rotation speed of sugarcane holding device (n), forward speed of harvester (v) and the installed position is given.
Study of Methods for Minimizing Construction Delays: Evidences from a Developing Country
Authors: Pourrostam Towhid , Ismail Amiruddin
Published: February 2011

Delays are one of the biggest problems in construction projects in developing countries, as cause negative effects on the projects. Delays can be minimized only when their causes are identified. This paper aims to identify effective methods of minimizing delay in construction projects. The literature related the field of causes and effects of delay and methods for minimizing construction delay has been reviewed over the last decade. This paper highlighted methodology to reduce construction delays from consultant and contractor viewpoints. The perspective of contractors and consultants has been analysed to rank the methods of minimizing construction delays based on their Relative Importance Index (RII). The most effective methods of minimizing delay in construction projects were: adequate funding throughout the project, competent project manager, awarding bids to the right designer/contractor, complete and proper design at the right time, availability of resources, clear objective and scope, and the use of experienced subcontractors and suppliers. The result can be used as a guideline to successfully handling construction projects in Iran as well as other developing countries.
Anti-Crashing Energy-Absorbing Simulation and Optimization of Thin-Walled Components
Authors: Chen Bing Zhi , Lv Zhi Dong , Xie Su Ming , Zhao Wen Zhong
Published: February 2011

Higher speed and loading capacity of trains nowadays have aroused higher ability of crashworthiness, which could be effectively improved by well-designed energy absorbing structures. The thin-walled components, the most traditional and effective energy absorbing device, have been widely used for design of energy absorbing device. As a result, the thin-walled components are used as an example to examine the process of axial compression of it. A comparison of a dynamic compressing simulation on fold-collapse tube and the experimental result of it is made, which shows the two matches very well. Based on this comparison, a further research and optimization on the thin-walled energy absorbing components is implemented. With the material modal and finite element modal of this component, a research on the simulation of PAM-CRASH, the crashing finite element Software, is implemented on such component with different shapes of cross-section, different thickness and square cross-sections with single-cell and multi-cell. What's more, suggestions on such thin-walled components energy absorbing structure is given based on the analysis of the parameters of the simulation.
Problems in the Application of Commercial CAD/CAE Software and Improvement Methods
Authors: Wang Cheng , Yang Xiong Wei , Yang Bao Kun
Published: February 2011

CAD / CAE technology has led traditional product design and analysis to digital. However, commercial CAD / CAE software also has its problems. Problems in the application of commercial CAD / CAE software are summarized in these this paper. From perspective development of software engineer, new technology such as integrated design, design reuse, intelligence and automation, workflow customization, application development, experimental and simulation complement each other are introduced to overcome these problems in this paper.
Practical Optimization of Industrial Gravel Size in Gravel Packed Well
Authors: Deng Jin Gen , Chen Yu , Wang Li Hua , Zhao Wen Long , Li Ping
Published: February 2011

In the design of gravel packing sand control, the reasonable selection of gravel size is one of the keys to implementing sand control measures successfully. Aiming at the defects of commonly used methods of gravel size design and the characteristic that the gravel used in field operation is actually a mixture of gravel with multiple grain diameters, this paper builds a model of pore structure in gravel layer through researching the gravel pack structure caused by the gravel of two grain diameters mixed under actual packing conditions, calculates and analyzes the pore sizes in gravel layer. Ultimately, based on Saucier method, this paper presents a new gravel size optimization idea for gravel packing sand control with multiple grain diameters mixed, which agrees with the actual situation of industrial gravel, and gives the idea’s computing method. Considering the ideality of the model in this paper, the author has modified the computing method to make it more fit for the actual packing situation. This gravel size design method also gives consideration to the impact of formation sand uniformity on sand control effect, so it have the characteristics of good practicability, wide applicability and more accurate than other conventional methods.
A Prediction of Water Breakthrough Time of Horizontal Wells in Gas Reservoirs with Bottom Water
Authors: Zhu Wei Yao , Huang Xiao He , Song Hong Qing , Deng Jia , Liu Xuan
Published: February 2011

Based on the theory of porous flow, a study on prediction of water breakthrough time of horizontal wells in a homogeneous gas reservoir with bottom water is presented. This paper derives water breakthrough time formula of horizontal wells in a reservoir with bottom water drive. In the formula many factors are taken into account, such as height of water avoidance, gas-water mobility ratio, irreducible water saturation, residual gas saturation, etc. Case study indicates that for a horizontal gas well with constant production rate, the water breakthrough time is proportional to the height of water avoidance.
Behaviour Characteristics of Pressure Bump of Deep Mining in Kailuan Coal Mine and Micro Seismic Monitoring Technology
Authors: Zhang Ying , Gao Lian Feng , Zhang Shao Zhong , Sun Juan , Zhang Peng
Published: February 2011

Pressure bump is a serious disaster to threat coal mine production safety. The roof and floor strata in Kailuan coal mine are made of sandstone and mudstone with relatively poor rigidity. Most of mines have been into the deep mining stage over one thousand meters. High-stress becomes the key factor induced pressure bump. In this paper, according to coal mining strata, fault development, mine inflow and other geological factors, based on fracturing parameters of mine rock and wall rock in the pilot mines (Qianjiaying Mine, Tangshan Coal Mine), boundary conditions of the occurrence of pressure bump is tested by numerical simulation using RFPA software. It discusses the mechanism and laws of pressure bump under high stress in the deep mining. Mining face and roadway are taken real-time monitoring, using micro seismic monitoring system (MMS). The location and level of micro seismic events within the coal formation caused by breakdown could achieve precise position. Spatial distribution and characteristics of coal and rock bursting could be identified. The stability of coal and rock could be monitored real-time and analyzed. Pressure bump could be predicted and prevented effectively.
Geological Features of Kailuan Coal Mine and the Laws of Pressure Bump for Deep Mining
Authors: Gao Lian Feng , Zhang Ying , Niu Yao Han , Wang Ying Chun , Sun Juan , Zhang Peng
Published: February 2011

Pressure bump in coal mine production safety is a serious disaster. Geological conditions in Kailuan Mine are complex. Coal strata based on the Carboniferous - Permian coal. The roof and floor are made of sandstone and mudstone with poor rigidity. Fault development and mine have large amount of water inflow. Most of mine are already getting into the mining stage over one thousand meters deep. Increasing stress and high stress induced pressure bump as a key factor. In this paper, according to geological characteristics of Kailuan Coal, it analyzes the impact and the laws of pressure bump in the representation of deep mining phase, which have certain reference for coal mine safety production.
Intelligence Mining with Electro-Hydraulic Control Technology
Authors: Lu Ming Xin , Lv Ming Feng , Wang Ju Guang , Li Min , Zhao Jie , Liu Yong Yi , Zhao Yang , Wang Jing
Published: February 2011

The underlying way to reduce accidents is reducing the number of workers on the coal face. Automatic mining can realize this object. The key for unmanned automatic mining is the application of electro-hydraulic control technology used on workface support. The electro-hydraulic control system applied in Wannian colliery has following function: Automatic moving , lowering and rising of support, monitoring and display of roof pressure; Shearer locating, controlling of cutting height and shearer speed, remote operation and procedure running; Automatic tension of conveyor chain, conveyor operation with constant power and monitoring and fault diagnosis of conveyor speed reducer.
Key Technologies of Sucker Rod Pump Card Diagnosis Based on BP Neural Network
Authors: Wu Xiao Dong , Zhao Rui Dong , Hao Zhang , Zhen Tao , Lei Su
Published: February 2011

Sucker rod pumping is a dominated artificial lift method for oil production engineering. In the production process, diagnosing the condition of pump using dynamometer card is vitally significant to monitor and manage the pumping system. With the ability to reflect arbitrary non-linear mappings, the BP neural network can be used in pattern recognition of the pump dynamometer card. In this paper, some key technologies of establishing reasonable neural network are introduced. The number of neurons in input layer depends on the selection of characteristic value. The number of neurons in hidden layer can be obtained by some models, optimum value will be chosen out. The number of neurons in output layer depends on the recognized behavior of pump. After the construction of neural network, the more effective and practical BP neural network will be obtained by suitable samples and appropriate training strategies.
Review of Sour Gas Field on Corrosion Factors and Development Progress
Authors: Han Yan , Zhao Xue Hui , Bai Zhen Quan , Wei Bin
Published: February 2011

Through researched on corrosion factors and development progress of sour gas field in China, the development situation of sour gas field in China was defined, the types of sour gas corrosion and impact factors of hydrogen sulfide stress cracking were illustrated. The results showed that, there are many corrosion mechanisms not clear when synergistic with different factors. The 105ksi grade drill-pipe was manufactured successfully, but it’s not enough for deep-well drilling. The standard API grade drill-pipe of low yield strength and hardness were mainly used in high sour gas field development. A series of tubing & casing were research and development, and applied in many overseas oil fields successfully.
Design and Matching Calculation of Hydraulic Helical Axial Multiphase Pump
Authors: Li Zeng Liang , Lu Sheng Nan , Zhao Zhong Hao
Published: February 2011

Helical axial multiphase pump is a new kind of pump which can pump and transport a mixture of oil, water and gas. The greatest advantage of the pump is that it can pump and transport gas and fluid at the same time, can adapt air plug and liquid slug and is insensitive to solid particle. The pump is currently drived by submersible motor. However, hydraulic drive, a new kind of drive type, is firstly put forward in this paper. This paper introduces the structure of the hydraulic helical axial multiphase pump, offers an evidence for the research development and production of the pump, deduces the calculating method of power matching of the pump and provides theory basis for the application of the new-type pump in oil exploitation in the future.
Resistance Analysis of Belt Conveyor during Horizontal Turning Section
Authors: Cheng Xiang Wen , Du Hai Bing
Published: February 2011

Force state of belt conveyor during horizontal turning section was researched to improve the design level of belt conveyor with horizontal turning. On this basis,three-dimensional mechanical model describing the force state of conveyor belt during horizontal turning section was built. Then each force acting on conveyor belt was decomposed along principal coordinate direction by coordinate transformation, and the balance equations were established at different coordinate axes directions, respectively. According to the calculation formula of running resistance derived by balance equations, the factors affecting running resistance were analyzed, which can provide theoretical basis for the optimization design of belt conveyor with horizontal turning.
Simulation Analysis of the Tilted-Jaw Crusher Based on ADAMS
Authors: Huang Peng Peng , Lei Qiang , Wang Kan
Published: February 2011

Through combine geometric modeling in SOLIDWORKS with dynamic simulation in ADAMS, a tilted-jaw crusher model was built. The content of simulation are horizontal and vertical displacement of discharging and feeding port, dynamic motion characteristics, speed and acceleration of movable jaw’s center of gravity, the pendulous moment that bracket suffered, and other important parameters .The results confirmed that the movement of the tilted-jaw crusher and dynamic features meet the crushing requirements. But bracket and bearing existed huge pendulous power and pendulous moment. The research and ideas about the tilted-jaw crusher value for the optimal design of the crusher, provide an effective method for improvement, there is a strong practical value.
Study on XML-Based Apriori Algorithm Applying to Remote Diagnosis System for Hoist
Authors: Li Juan Li , Yang Zhao Jian
Published: February 2011

According to the data characteristics in the hoister operation process and the network requirements of fault diagnosis system, this paper proposes a XML-based apriori algorithm, and the algorithm is applied to hoist remote fault diagnosis system. The experiment result shows that applying the system can make the hoist fault diagnosis more scientific, reasonable and improve the efficiency and accuracy of diagnosis.
Improvement to the Gear Reducer for a 45T Mining Car
Authors: Cao Li Bo , Deng Zhi Wei , Xiong Tie Gang
Published: February 2011

Tooth broken, oil leaking and bearing burnt have influenced the original running of a 45T mining car which adopted one two-class gear reducer. In order to solve these problems, a three-class gear reducer was developed and its strength and stiffness were validated by using experience formulas and FEM. The sample of the three-class gear reducer was manufactured and tested in practical work for more than a half year. The results show that the three-class reducer works well, and the problems occurred in the two-class one can be resolved.
Coordination and Optimization of Energy Using the Multiple Linear Regression Analysis in a Green Power System
Authors: Niu Xiao Na , Sun Ying , Zhao Chuan Hui , Yu Shen Hang
Published: February 2011

The State Grid has proposed to construct a strong smart grid to solve the resource scarcity, environmental pollution and other social problems, which will certainly drive the development of green energy, such as wind energy, solar energy, tidal energy and biomass energy. The study will build a Green Power System Assessment Model (GPSAM) using multivariate statistical analysis to optimize the energy resources of a region and finally to provide reference for the construction of a new plant or the plant expansion to get the balance of environment benefit, economic benefit and social benefit.
Design of Non-Contact Balance Head for Grinding Wheel
Authors: Su Jian , Gao Bing
Published: February 2011

Balance head is a key component of grinding wheel auto-balance device. The key issue is to design a balance head with high accuracy and durability. Considering these two factors, a new type of balance head with non-contact driving structure is proposed and described in this paper.
Study on Degree of Engineering Changes Based on Product Family
Authors: Zeng Fu Hong , Zhou Lan Hua , Li Ze Rong
Published: February 2011

In order to get the total Degree of Engineering Changes for product family (EDCKBOM), which can help enterprise to select a scheme of Engineering Changes (EC) with a minor EDCKBOM and analyze the type of change propagation for the CE in the product family, the Knowledge-body based on Bill of Material (KBOM) model was built for representing domain-specific knowledge, which was described as trial(GUS, CUS, GUR) and manifested as an AND/OR tree structure. Then, a complete solution system based on recursive algorithm was designed to compute the EDCKBOM. Finally, an example was given, and the approach was proved to be efficient and practical.
Study of Parameters Optimization of Organic Rankine Cycle (ORC) for Engine Waste Heat Recovery
Authors: Zhang Hong Guang , Wang En Hua , Ouyang Ming Gao , Fan Bo Yuan
Published: February 2011

Energy saving and environment protection are two most important issues that today’s internal combustion engine industry must tackle with. Lots of heat energy waste with the exhaust gas when the engine is running. Organic Rankine cycle (ORC) is a good method to recover the waste heat of the engine exhaust. In this paper, the mathematical model of ORC was built up in Matlab and the parameters were optimized using genetic algorithm (GA). Eight pure component organic working fluids were selected and compared. The results indicate that the evaporating pressure of the working fluid and the condensing temperature are two important parameters for ORC; the super heater also can enhance the system thermal efficiency slightly.
Hydraulic Variable Pitch Control and Aerodynamic Load Analysis for Wind Turbine Blades
Authors: Kong Yi Gang , Gu Hao , Wang Jie , Wang Zhi Xin
Published: February 2011

This paper reviews the principle of power production, and analyses the influnece on aerodynamic load and output power due to the variation of pitch angle. For three-bladed upwind horizontal axis wind turbine, the blade pitch control is used primarily to adjust the power coefficient and obtain the optimal power at high wind speed, but it also make aerodynamic load, such as edgewise, flapwise and torsion moment, change during variable pitch control. Hydraulic mechanism is used in a process requiring large driving forces and torques, fast response and high stiffness. Therefore, the variable pitch mechanism is operated using electro-hydraulic proportional technology in this paper. Simulation results are presented and analysed to show that aerodynamic load and output power are sensitivity to pitch angle for wind turbine blade. These works lay foundation for the further studying of individual pitch, power control, fatigue and dynamical stability for wind turbine.
CFD Analysis of Evaporator Condition on Ejector Performance in a Solar Energy Air Conditioner
Authors: Wang Jin Feng , Xie Jing , Tao Le Ren , Wang Yong Hong , Yang Xin Yu
Published: February 2011

The 2D axisymmetric, real gas model was developed to calculate the ejector in the ejector cooling system. The calculation of the real gas model occupies more computer resources, but its result can be more authentic. The CFD model was validated with available experimental data. Predictions at the operating conditions in the ejector cooling system were discussed. The aim of the prediction is to obtain the ejector performance in the non-design condition and variable operating condition. There is an optimum evaporator condition te=20°C (Pe=0.65bar) with the giving geometry parameters. In the calculation range, when te increase, the entrainment ratio would increase, and the system mechanical COP would also increase. In the paper, the cause of the result was analyzed using the CFD technique. The ejector entrainment ratio was affected by the operation condition and the ejector structure in the same time.
Study on Characteristics of the Linear Air-Conditioner Compressor at Varied Operating Conditions
Authors: Xie Jie Fei , Li Xin Hua , Zhang Hong
Published: February 2011

This paper mainly introduces a novel linear air conditioner compressor which is driven by the linear oscillatory motor with two divided moving body, of which the Cylinder-piston assembly presents symmetrical distribution along the axial direction. The compressor dynamics equations were built and solved numerically with the fourth order Runge-Kutta method. in the meantime, this paper emphatically analyzes the influence of those factors, such as the intake pressure, the exhaust pressure, the suction gas superheat, the cooling degree, on the compressor performance at varied operating conditions. These works shows that improving the suction gas pressure and reducing the exhuast pressure can help to increase the refrigeration capacity and energy efficiency ratio of the air conditioner compressor. Those analysis results provide theory foundation for design,development, and engineering application of this linear air-conditioner compressor.
Develop Course of Chinese Laser Fusion
Authors: Xie Zhi Jiang , Liu Qin , Xu Xu , Zhou Li Dan , Chu Hong Yu
Published: February 2011

Inertial confinement fusion has been concerned in the year 1963. It was from the 1970s that China began to study inertial confinement fusion devices, and got lots of achievements in recent decades. The development of Inertial Confinement Fusion has an important and special meaning, whether to the national economy, military applications or for basic research. This paper comprehensively discussed the process of several large-scale ICF laser devices, the major technical indicators and the main experiment related to the devices.
Research of Resource Virtualization Technology Based on Cloud Manufacturing
Authors: Li Chun Quan , Hu Chun Yang , Wang Yan Wei
Published: February 2011

A method of virtualization technology of manufacturing resources was analyzed and designed in Cloud Manufacturing environment toward the new type of networked manufacturing. Diverse-grained information such as the abstract, description, interface, packages have been put forward on basis of resource virtualization technology of manufacturing grid in order to implement resource virtualization. Virtualization of manufacturing hardware and software resources were mainly analyzed and researched in this paper. The primary research shows that this resource virtualization technology of Cloud Manufacturing can provide an important basis and premise for the further development of Cloud Manufacturing theory.
Study on Multi-View Model for Cloud Manufacturing
Authors: Luo Yong Liang , Zhang Lin , He Dong Jing , Ren Lei , Tao Fei
Published: February 2011

Cloud manufacturing (CMfg) is a new service-oriented, highly efficient, lowly consumption knowledge based, and intelligent networked manufacturing model. It aims to provide theoretical and technical supports for the transformation from production-oriented manufacturing to service-oriented manufacturing [1]. In order to further analyze the connotation and characteristics of CMfg, multi-view models for CMfg are investigated based on [1] and [2] in this paper. The first is the network view model, which describes four kinds of network involved in the running process of CMfg system; the second is the function view model, which describes the functional subsystems of CMfg; the third is the running view model, which represents the running process after a requirement is submitted to CMfg system.
Study on the Parallel Rendering Technology Used in Virtual Prototype System
Authors: Yin Ming Qiang , Li Shi Qi
Published: February 2011

With continuous expansion of manufacturing scale, the scene data that virtual prototype system has to deal with is far beyond a single computer's processing power. To meet the requirements of large-scale simulation, this study designs a virtual prototype system based on PC cluster. The problems including software architecture of virtual prototype system, transformation of CAD model, scene graph management, real-time rendering of huge dataset, and so on are investigated in detail in this paper. Finally a prototype system has been implemented. The system is constructed by PC cluster and gigabit LAN. The aim of the system is to build a large-scale, high resolution, immersive virtual environment supporting users' virtual design and manufacture.
Investigation of Liquid Sensor Using a Dual-Mode Thin Film Bulk Acoustic Resonator (FBAR) Combined with Au/Cr Layers
Authors: Chang Wei Tsai , Chen Ying Chung , Lin Re Ching , Kao Kuo Sheng , Jiang Jia Ming , Yang Chun Hung , Cheng Chien Chuan
Published: February 2011

This paper reports a dual-mode film bulk acoustic resonator (FBAR) device combined with Au/Cr layer to construct a liquid sensor. In order to obtain a liquid sensor with high sensitivity, the dual-mode FBAR with piezoelectric layer of ZnO thin film has been investigated. The dual-mode characteristics of FBAR appeared by off-axis deposition of ZnO thin film with the RF magnetron sputtering. The top and bottom electrodes consisted of a titanium (Ti) and a platinum (Pt) layers were deposited by dual-gun DC sputtering system. Owing to the chemical stability, the Pt layer is not only a perfect bottom electrode but also an etching stop layer. The gold layer (Au) is adopted for the formation of sensory area. In order to improve the adhesion between the Au layer and the Pt layer, a chromium (Cr) layer was deposited onto the backside cavity of the FBAR device before the Au layer was deposited by a DC sputter. The Au/Cr layer is used as the binding layer with analytes of DI water because of its hydrophile. The frequency response is measured using an HP8720 network analyzer and a CASCADE probe station. The resonant frequencies of longitude and shear modes in air appear at 2262.5 MHz and 1012.5MHz, whereas the resonant frequencies of longitude and shear modes in DI water are 2062.5 MHz and 955MHz, respectively.
Production of Bacterial Cellulose Using Different Carbon Sources by Two-Stage Cultivation Strategy
Authors: Lin Jun Hong , Lin Yi Jen , Kuo Jui Chih , Chen Ting Yu , Sung Wen Pei
Published: February 2011

The production of bacterial cellulose (BC) from Gluconacetobacter xylinus could be improved by the two-stage cultivation strategy. The jar fermentor was applied at first stage to increase cell concentration. At the second stage, the bacteria statically grew within beaker. Three different fraction of cell volumes were cultured in modified YPD-glucose medium or YPD-molasses one. In the modified YPD-molasses medium, the BC yield were highest in this study when the consuming rate of reducing sugars (RS) was 0.181 g-dry BC L-1 d-1 and the BC production rate was 0.183 g-dry BC/g-RS, respectively. The modified YPD-glucose medium could get the maximum pellicle thickness of 5.56±0.64 mm and water content of 99.4%, respectively.
Solving the TSP by Simulated Annealing Genetic Algorithm Based on Google Maps JavaScript API
Authors: He Xin Biao , Mo Yi Wei
Published: February 2011

Google Maps JavaScript API enable users calculate directions by using the DirectionsService object. With these directions results, a new approach to solve the Travelling Salesman Problem (TSP) is proposed in this paper. This DirectionsService object communicates with the Google Maps API which receives directions requests and returns computed results. TSP is solved by simulated annealing genetic algorithm (SAGA) with help of returned directions results. In experiment example, the optimal route of the TSP was provided graphically with Google Maps and textually in user interface. The final results demonstrated the feasibility of the proposed approach.
A Product Structure Management Method Based on Ajax
Authors: Lu Ni Ya , Liu Fu Yun , Shay Tony
Published: February 2011

With the thorough application of Internet/Intranet in product data management field, system of product structure management based on Web has been becoming a development trend. A kind of product structure management method based on Ajax is presented. The method was realized through program. As an example, the algorithm was used in an actual product, and the algorithm was validated.
Strategy of the Information Construction in Modern Tourism Enterprise
Authors: Zhang Yu Rong
Published: February 2011

Tourism is the most dynamic and potential industry of the world. The information constrution of tourism enterprise can promote the transformation of traditional tourism enterprises to the modern tourism enterprise, improve the production efficiency and enhance the core competitiveness of tourism enterprise. In this paper, the conception of tourism enterprise informater is clarified and the necessity of the information construction in modern tourism enterprise are analyzed. Finally, it is pointed out that we should pay more attention to four aspects: strengthen the support efforts of government to the information construction in modern tourism enterprise, improve the constrution of the tourist information management system (TIMS), optimize organization structure of tourism enterprises to promote information share, set up a professional team of tourism and information technology, encourage tourists to change their consumption habits.
Parametric Design of Foamed Sheet Die
Authors: Chen Zai Liang , Si Guang Ju , Wang Chuan Yang , Wu Dian Li
Published: February 2011

The components of sheet metal FMS are abstracted corresponding eM-Plant object, the sheet metal FMS’s automatic guided vehicle system and parts management system are built in eM-Plant. Adjusting the system parameters in the model, several simulations obtained an ideal simulation result. These research show that, using eM-Plant software to build model and simulate for sheet metal FMS can save time, improve simulation result of sheet metal FMS.
The Study of Job Shop Scheduling Based on Genetic Algorithm
Authors: Xiong Jun Xing , Zhao Jin Ping , Tu Hai Ning
Published: February 2011

Aiming at Job Shop Scheduling Problem with Minimal Makespan, This paper is designed to use genetic algorithm to solve the problem of job shop scheduling, and also achieves the algorithm by using the C#. Application shows that the genetic algorithm to solve job shop scheduling problem is efficient and has good application value.
Development of Intelligent CAD Design System for Straw Crusher
Authors: Chen Li Qing , Lu Lei , Zhang Jia Qi , Wang Ji Xian
Published: February 2011

The paper developed straw crusher intelligent design software based on UG software and Visual C++ software. Firstly, the frame structure and function modules of the system are discussed in detail. Secondly, the key technologies and design process of straw crusher intelligent CAD design system ware discussed; Lastly, The system has carried on the confirmation through the concrete example, straw w crusher parts has been carried on reconfiguration. Compared with traditional design, the method upgrades the designing ability and efficiency of the enterprise.
Using Logic Synthesis and Circuit Reasoning for Equivalence Checking
Authors: Fan Quan Run , Pan Feng , Duan Xin Dong
Published: February 2011

The existing SAT based algorithms combines two circuits into a miter, and then convert the miter into a CNF formula. After that, a SAT solver is invoked to check the satisfiability of the CNF formula. However, when a miter is converted into CNF formula, the structure information of the circuit is lost. Therefore,we are motivated to solve the problem of miter satisfiability using circuit reasoning. We use logic synthesis first to simplify the circuit, and then use a backtracking method to check the satisfiability of the miter. The preliminary experimental result sindicate that our approach is efficient.
Registration and Integration of Automobile-Bodies Scattered Point Cloud Based on K-D Tree
Authors: Zhou Yu , Zhang Wan Bing , Du Fa Rong
Published: February 2011

As the automobile-bodies point cloud had the traits of large geometric dimension, huge data and rigor reverse precision, the improved iterative closet point algorithm (ICP) is put forward. The searching structure is generated using k-D tree. The closet points are searched by k-Dimensional sphere. The mapped relationship between points is generated. The matched points are filtered by the principle of geometric similarity. The solving of ICP algorithm is speeded and the registration precision of ICP algorithm is improved. The registration algorithm based on least-square and quaternion is used to calculate accurate registration result. The algorithm has certain theoretical and practical significance for improving of the efficiency and precision of registration. The reliability and accuracy of the algorithm are proved by experimentation.
Resource Modeling of Manufacturing Process Optimization under Dynamic Environment
Authors: Lv Min , Sun Xue Dong , Wang Gang , Che Ying
Published: February 2011

With the features of large electromechanical products like high cost and limit quantity of manufacturing equipment, long processing cycle, uncertain returned repairing work, etc., a resource modeling method based on capability was proposed for supporting manufacturing process optimization. And, mainly from three aspects of resource that were capability, status transition and service cost, manufacturing resource was described in this model. An automotive process and automotive mapping of resource was supported by capability description of this resource. Moreover, how the resource status was changed with the changing of processing task was described in the status transition of resource. Then, when describing service cost, installing and unloading cost was considered as well as expense cost in unit time in order to support the situation analysis of changing tasks in the manufacturing process. So the optimization of manufacturing process of large electromechanical products in a dynamic resource environment was supported by the combination of these three aspects. Finally, combining with a concrete case about manufacturing of rotor which is a key component in steam turbine, the validity of this method was verified.
Research on the In-Process Model Based on CIMS
Authors: Fan Cai Xia , Wu Wei Zhong
Published: February 2011

Firstly, the idea put forward in this paper is Contemporary Integrated Manufacturing System (CIMS) environment needs the In-Process Models (IPMs) which are associated completely with the information of design and manufacturing. Then, establishment of IPM by means of boolean subtraction between blank and machinable area features. Finally, many examples of verifying the feasibility of this method are presented.
Study of the Knowledge–Based Integrated Equipment Management System for Process Enterprise
Authors: Yu Yang , Ji Xu , Wang Dong , Zhao Feng , Tang Jian Hua
Published: February 2011

Though analyzing the characters of the equipment management for process enterprise, there is a knowledge–based integrated equipment management system using knowledge management in order to maximize benefit, which emphasizes the technical reliability, enterprise capability balance and consists of equipment optimized control model, equipment operating cost model, equipment reliability evaluation model, equipment fault diagnosis model and equipment renovation decision support model, etc. The knowledge acquisition and representation model is aim to realize the decision-making flow of the process enterprise. A typical example is also presented to demonstrate the application of the integrated knowledge-based equipment management system.
A System for 3D Digital Assembly Process Planning and Simulation in Airplane Manufacturing Enterprises
Authors: Li Yuan , Dong Liang , Yu Jian Feng , Zhang Kai Fu
Published: February 2011

The 3D assembly process planning and simulation system can improve the product manufacturing level in airplane manufacturing enterprises, but now there is few system of this kind. So we design a system named Digital Virtual Airplane Assembly Process Planning and Simulation System (DVA2P2S2) to improve the situation. Firstly, we design the system’s structure with data support, systems integration and functions development and user application as its three levels. Secondly, its running flow is introduced. Thirdly, two key technologies which are 3D digital assembly process structure and the method of automatic creation of simulation file are discussed. At last, we set a subassembly of an airplane to validate the DVA2P2S2. The result shows that the DVA2P2S2 is in accordance with the Concurrent Engineering’s requirements, and it can improve the work efficiency and reduce the process design iteration and cycle significantly.
A Parametric Die-Base in SolidWorks
Authors: Zhang Xin Qun
Published: February 2011

The study of parametric die-base developed on SolidWorks is presented in this paper. Here Visual Basic 6.0 is selected as the development tool, and the handle of a die is taken as an example to describe the design process with dimension driving. Users may create a series of standard-parts automatically by inputting different parameters through the application interface developed with VB.
Generation, Analysis of Switched Mode Dc to Dc Converters by the Use of Converters Cells
Authors: Liu Hai Lang , Zhang Rui Bin , Yang Ping
Published: February 2011

The conventional PWM converter topologies limit the operation to lower switching frequencies because of the minimum ON-time of the transistor switch. The quadratic feature is interesting for application where a wide voltage range is necessary, a quadratic buck-boost converter is presented. The converter cell is showed, the quadratic buck converter with the converter cell can convert to the quadratic buck-boost converter without increasing elements.
Research on Integration of Rapid Manufacturing Grid
Authors: Shan Jin Song , Hu Rong Lin
Published: February 2011

Rapid manufacturing grid (RMG) is the application integration system of grid technologies on manufacturing, which can be used for manufacturing platforms, resource managing and sharing data among departments of manufacturing enterprise. In this paper, Rapid manufacturing grid architecture is analyzed. A three-tier Application Integration System of Rapid manufacturing grid is proposed to haring manufacturing resources in manufacturing process.
Interface Stress Analysis of the Bending Cylinder Containing Inclusion
Authors: Tang Xin Yan
Published: February 2011

Using the elasticity and the singular integral equation method, an analysis of a bending cylinder containing inclusions is carried out. The disturbing interface stresses on the inclusion sides and the stress intensity factors at the inclusion tips are obtained. The results given in this paper are useful for the strength design of the engineering structures or mechanical components containing inclusions.
An Assessment Method of Structure Safety for General Overhead Traveling Crane Based on Bayesian Network
Authors: Xu Ge Ning , Guo Wen Xiao
Published: February 2011

An index system for structure safety assessment was presented on the basis of analyzing and comparing of the domestic and foreign researchers. In addition, a method for structure safety measurement using Bayesian network, which has the excellent abilities of expressing and reasoning knowledge under uncertain environment, was proposed to construct a safety assessment model afterward. The assessment model is able to deal with complicated relationship as well as the different opinions of experts. The output of the safety assessment model can be used to predict and diagnose different safety conditions. Finally the model is applied to evaluate the security level of a certain overhead traveling crane.Its results show this method is effective and reasonable.
The Impact of Organizational Slack on the Performance of Material Production and Processing Firms
Authors: Zhong He Ping
Published: February 2011

This paper studies the impact of organizational slack on the performance of material production and processing firms by using empirical analysis based on the data get from 54 firms in Henan Province by questionnaire. The result shows that organizational slack is positively related to the performance of material production and processing firms. The analysis also finds that there is the inverted U-shaped relationship between organizational slack and performance, but this relationship is not significant. Overall, results highlight the importance of additional research into intervening factors impacting the slack–performance relationship.
The Research Progress of Melanin
Authors: Wang Jian Ming , Ao Ai Hua , Qiao Chang Sheng , Zhong Yu , Zhang Yuan Yuan
Published: February 2011

The sources of melanin and the sorts of melanin are introduced. New techniques for extraction and analysis of natural melanin were introduced. New analytical techniques are high performance liquid chromatography, high-speed countercurrent chromatography, high performance capillary electrophoresis and chromatography-mass spectrometry. The relationship of polyketide melanogenesis molecular biology to that of nonmelanin-producing pathways in a wide range of fungi and other organisms is discussed. The applications of melanin are introduced.
Effect of High Temperature and Humidity in Storage on Component of Soy Protein Isolate
Authors: Shi Yan Guo , Sun Bing Yu
Published: February 2011

The SPI was applied in food industry widely, but its functionalities may change during storage. The effect of store temperature, time, RH and package material on emulsibility and the component of SPI were studied, when SPI was packaged in 100% N2 and Al, 80%N2:20%CO2 and Al, 60%N2:40% CO2 and Al, vacuum and Al, white paper/plastic/HDPE, and PE and then stored for 5 months in the conditions of RH 80% and 30°C. It was shown that the 7S/11S of SPI only packaged in PE decreased significantly(p<0.05), while the subunit of SPI would lost in different levels and obviously in PE. It was observed by SDS-PAGE that the subunit of SPI disaggregated and molecules aggregated. Focusing on the sulfydryl group and disulfide bond, it was found that the content of sulfydryl decreased while disulfide bond increased.
Incremental Launching Construction Method for Steel Truss Suspension Bridge
Authors: Xu Kai Ming
Published: February 2011

For steel truss suspension bridges, traditional construction methods always have their disadvantages. This paper firstly points out the limitations of the traditional construction methods (such as the erection gantry method and the deck crane method). As the solutions, incremental launching method is proposed. Then, as an example based on a certain suspension bridge in Western China, non-linear analysis is carried out in order to illuminate how to decide the important parameters in practical application. Some further problems are discussed at the end.
The Characteristics of CrNX Coatings with Different Interlayer
Authors: Song Hui Jin , Yan Qiang
Published: February 2011

CrNx coatings with different interlayer were deposited on AISI 304 stainless steel substrates by conventional DC magnetron sputtering technology. Effects of the concentration and preparing condition on the microstructure and mechanical properties of the coatings were studied by using SEM, XRD and nanoindentation technique. The results show that all investigated CrNx coatings present a NaCl type crystal structure with a stronger (200) preferred orientation. However, the shift of CrN diffraction peaks and its orientation are different in CrNx coatings with different interlayer. Furthermore, there are Cr phases in the coatings that Cr/CrNx multilayer was alternately deposited in the interlayer. In three kinds of them, CrNx coatings that Cr/CrNx multilayer was alternately deposited in the interlayer show in turn higher hardness of about 31GPa and worse adhesion. On the contrary, CrNx coatings that the content of nitrogen was gradually increased in the interlayer present in turn lower hardness and best adhesion.
Adaptive Tracking Moving Targets Based on MACA Algorithm
Authors: Qu Ju Bao
Published: February 2011

Moving target tracking is widely used in various fields, but adaptive tracking algorithm is not ideal. Proposed a multi-mode adaptive CamShift algorithm (MACA). CamShift algorithm will be sensitive to the characteristics of H component extended to the S, V components, convex combination model is constructed using multi-objective programming optimal solution method for the best combination of solution adaptive color recognition, with the inclination to identify and target-based IIR filter state of motion information to predict tracking technology made color more complex target scene is rotated, block and rate of change can accurately track the results. The experiments show that the algorithm has good robustness and adaptive ability.
Modeling and Analysis of Crash Pulse of Vehicle Body Based on Tipped Equivalent Square Wave Method
Authors: Liu Zhi Xin , Shi Yong Wan , Chen Hong
Published: February 2011

Crash pulse is an important parameter that can directly reflect the process of vehicle crash. And it is found that there exists an interrelationship between crash pulses and injuries of occupants. In this paper, a method of crash pulse modeling named TESW was adopted to simplify the real crash pulse with several characteristic parameters and then 37 groups characteristic parameters were obtained from 37 crash pulses of full-scale frontal tests, subsequently correlation analysis of crash pulse of body and injury of occupant were performed. And several rules that how these characteristic parameters correlate injuries of occupants were summarized.
Investigation on Properties of Granite Asphalt Mixtures Prepared Using Fine Recycled Concrete Aggregate
Authors: Sun Yi Han , Wu Shao Peng , Zhu Ji Qing , Zhong Jin Jun
Published: February 2011

In order to improve the performance of granite asphalt mixtures, as well as make full use of waste concrete, the AC-25 asphalt mixtures were prepared using fine recycled concrete aggregate and coarse granite aggregate. The moisture stability, high-temperature property, low-temperature property and fatigue property of asphalt mixtures were investigated. Results indicate that fine recycled concrete aggregate (RCA) improves the moisture stability and low-temperature property of granite asphalt mixtures which can meet the requirements of China’s Technical Specification for Construction of Highway Asphalt Pavements (JTG F40-2004) and even are better than those of traditional limestone asphalt mixtures. Meanwhile, fine RCA makes the advantage of granite asphalt mixtures in high-temperature property more distinct with good fatigue property.
Realization of Three-Dimensional Nanostructure Fabrication by Nanoimprint on Silicon Substrate
Authors: Fan Xi Qiu
Published: February 2011

Traditional optical lithography techniques to fabricate three-dimensional (3D) nanostructures are complicated and time consuming. Due to the capability to replicate nanostructures repeatedly in a large area with high resolution and uniformity, nanoimprint (NI) has been recognized as one of the promising approaches to fabricate 3-D nanostructures with high throughput and low cost. This paper introduces a novel 3-D nanostructure fabrication method by nanoimprint on silicon substrate. Nanoscale gratings and microlens array are taken as examples of 3-D nanostructures fabricated by nanoimprint. High fidelity demonstrates the possibility of nanoimprint to fabricate 3-D nanostructures on silicon substrate.