bluuebunny/crossref_metadata_2025 huggingface dataset:
The Design and Implementation of a Multifunctional Programmable Signal Generator
Authors: Li Xue Zhe , Wang Xu Ming
Published: July 2012

Signal source with high precision and programmable is needed in modern scientific research, communication system, teaching apparatus, electronic measurement and so on. In the paper, a portable signal generator is proposed, which has a core of AT89C51 and programmable DDS integrated chip AD9833. The paper also introduces the principle and implementation of system project. The generator can output sinusoidal wave, square wave, triangle wave, dc voltage, and it has manual and SPC two working mode, can implement PC SPC output through RS232 communication interface. Experiments show that the system has advantages of high precision, wide scope, small size and flexible operation etc.
Vehicle Detection Based on Binocular Stereovision and Edge Extraction
Authors: Tong Fei , Xu Lei
Published: July 2012

Traffic accident has already become a significant social problem. Intelligent Transportation Systems (ITS) is vital to improve the vehicle safety. As an important part of ITS, vehicle detection has been widespread concern. This paper presents a vehicle detection algorithm based on binocular stereovision and edge extraction: analyze spatial coordinate feature belong to object point and detect obstacle points; segment Region of Interest; apply symmetry to detect vehicle. The experimental results indicate that the algorithm possess high efficiency and accuracy.
A Laser Projection Device for Locating Points on the Plane Object
Authors: Ding He , Ouyang Jian Fei , Ma Xiang , Yan Yong Gang
Published: July 2012

Digital image processing technology can extract the main feature of an image. In order to achieve the interaction between virtual points and plane objects, we propose the equipment for indicating points on the plane object using laser projection. We designed the equipment with a bracket, stepper motor, two-dimensional turntable, PC control unit, and a laser pointer. Next, we analyzed the mathematical model of the equipment and developed an algorithm for solving the motor rotation angle. Finally, we verified our design with an image. Here, we develop a system that can control a laser projection to a specified location by adjusting coordinates of virtual points on a computer.
Modeling and Performance Analysis for Cluster Tools Based on SPN
Authors: Zheng Xiu Hong
Published: July 2012

For analysis the performance of cluster tools, Stochastic Petri nets model was used to describe the serial process procedure of cluster tools and the operation sequence of the robot. The firing rate of transition represents the frequency of activities. In order to improve the scalability of the model, the modular approach is used to model. Firstly the sub-models of tool’s modules were developed. Then according to the process procedure, all the sub-models were combined to construct a Petri nets model. Finally, the firing rates are added to every transition. Markov process approach was used to analyze model. Some performance measures equation are deduced, such as the throughput, the utilization of process chamber, the utilization of the robot and the wafer residency rate in process chamber. Petri nets models and performance measures equation developed in paper can assist performance analysis and verify the effectiveness of scheduling algorithm.
Design and Research of the Gas Monitoring System Based on ZigBee Wireless Network
Authors: Wang Yan Kai
Published: July 2012

There are many coal mines in China, the gas disaster occurred every year with the same time. The dream of many scientists is able to design a set of accurate forecasts of gas monitoring system. We begin with the technology of ZigBee wireless networking, and we apply it to the gas monitoring system. We designed a gas monitoring system based on wireless network technology, and given the specific design methods, and detailed the process of building.
Extracting Ionosphere Scintillations Index Based on Single Frequency GPS Software Receiver
Authors: Huang Zhi , Yuan Hong , Zuo Qi Yao
Published: July 2012

Scintillations are caused by ionospheric plasma-density irregularities and can lead to signal power fading, loss of lock of the carrier tracking loop in the GPS receiver. The traditional method of monitoring and mitigating scintillation is to transform commercial GPS receiver with modified hardware and embedded software. To better facilitate advance development GPS receiver under different condition, GPS software scintillation receiver is designed in this paper. The hardware scheme of high-speed GPS signal acquisition system is first discussed and implemented with FPGA and DSP architecture. Then, we describe receiver software processing algorithm, particularly the portion involving the scintillation signal acquisition and tracking, ionospheric scintillation index extracting and scintillation monitoring. The performance of software receiver is demonstrated under scintillation conditions. Relevant results show that software-receiver based approach can avoid weak signal loss and extract effectively ionospheric scintillation parameter compared with the traditional extracting method. Software receiver is suitable and reliable for the ionospheric scintillations monitoring, and can provide theoretical foundations and experimental preparations for future scintillation studies implemented with Chinese indigenous BeiDou-Ⅱ navigation and poisoning system.
Research and Implementation of Key Technologies of Goaf Coal Spontaneous Combustion Wireless Monitoring System
Authors: Qin Xian Li , Fu Ming Chao , Li Liu Hui
Published: July 2012

In order to make up the deficiencies in the goaf coal spontaneous combustion monitoring of mine safety monitoring system. Provide the most direct and effective data for the early identification and prediction of the goaf coal spontaneous combustion fire. The NRF905 Radio frequency (RF) communication technology had been adopted to design the goaf coal spontaneous combustion monitoring system, which accompany by SCM, sensors, Clock circuit and CAN bus communication technology. The paper given the overall design of the system, and key technologies of system had been made research and implementation. Experimental tests showed that the device layout simple, networking fast, the effective data of each node position could have been made real-time collection.
The Control System about the Automatic Adjustment of the Press Control Values
Authors: Zhang Man , Yang Yong Qiang
Published: July 2012

This article designs a kind of automatic adjustment of the press control values based on PLC including the design of function, composition, principle and software. It not only analyses and studies the structure and the principle of the automatic adjustment, but also presents the selection of PLC, I/O assignmen and program design.
The Pitch Control Strategy with the Clonal Selection on Quantum Genetic Algorithm
Authors: Wang Huan , Zhang Da Tong , Dong Jian , Li Yong Zhan
Published: July 2012

This chapter reviews the objectives and techniques used in the control of wind turbines at the individual turbine level, where controls are applied to the turbine blade pitch and generator. The paper analyses the control strategy of the wind power generation, optimizes the power output energy conversion factor of the optimal tip-speed ratio and the optimal tip-speed ratio using the clonal selection on quantum genetic algorithm. After reviewing basic turbine control objectives, we provide an overview of the common basic linear control approaches and then describe more advanced control architectures and why they may provide significant advantages.
Study on Common Problem and the Design of Granary Railway Canopy
Authors: Liu Qi Xia , Zhao Yang
Published: July 2012

The railway canopy and mechanical canopy in the granary are large span special structure industrial architecture, has the design standard uncertainty, influence factor multiplicity, construction craft complexity questions and so on in the design and the construction. On the basis of obtaining the characteristics of granary railroad canopy, the design methods of roof, column and foundation for granary railway canopy are described, the defects of stability theory are analyzed, and the reasons of instability is summarized in this paper. The results will has good reference to similar projects in the future.
R&D of a Pulsatile Rotary Heart Pump Imitating the Native Ventricle
Authors: Qian K.X. , Jing T. , Yuan H.Y. , Wang H. , Wang F.Q. , Zeng P.
Published: July 2012

It is evident that a pulsatile flow is important for blood circulation because the flow pulsatility can reduce the resistance of peripheral vessels. It is difficult, however, to produce a pulsatile flow with an impeller pump, since blood damage will occur when a pulsatile flow is produced. Further investigation has revealed that the main factor for blood damage is turbulence shear, which tears the membranes of red blood cells, resulting in free release of haemoglobin into the plasma, and consequently lead to haemolysis. Therefore, the question for producing a pulsatile flow with low haemolysis becomes how to develop a pulsatile impeller pump with less turbulence? The authors have successively developed a pulsatile axial pump and a pulsatile centrifugal pump. In the pulsatile axial pump, the impeller reciprocates axially and rotates simultaneously. The reciprocation is driven by a pneumatic device and the rotation by a DC motor. For a pressure of 40mm Hg pulsatility, about 50mm axially reciprocation amplitude of the impeller is desirable. In order to reduce the axial amplitude, the pump inlet and the impeller both have cone-shaped heads, thus the gap between the impeller and the inlet pipe changes by only 2mm, that is, the impeller reciprocates up to 2mm, a pressure pulsatility of 40mmHg can be produced. As the impeller rotates with a constant speed, low turbulence in the pump can be expected. In the centrifugal pulsatile pump, the impeller changes its rotating speed periodically; the turbulence is reduced by designing an impeller with twisted vanes which enable the blood flow to change its direction rather than its magnitude during the periodic change of the rotating speed. In this way, a pulsatile flow is produced and the turbulence is minimized. Compared to the axial pulsatile pump, the centrifugal pulsatile pump needs only one driver and thus has more application possibilities. The centrifugal pulsatile pump has been used in animal experiments. The pump assisted the circulation of calves for several months without harm to the blood elements and the organ functions of the experimental animal. The experiments demonstrated that the pulsatile impeller is the most efficient pump for assisting heart recovery, because it can produce a pulsatile flow like a diaphragm pump and has no back flow as what occurs in a non-pulsatile rotary pump; the former reduces the circulatory resistance and the later increases the diastole pressure in aorta, and thus increase the perfusion of coronary arteries of the natural heart.
Application of Fractal Theory in the River Regime in the Lower Yellow River
Authors: Tian Shi Min , Su Xiao Hui , Wang Wei Hong , Lai Rui Xun
Published: July 2012

From 1960 to 1999, the river regime in the Lower Yellow River had been the wandering. After the operation of Xiaolangdi Reservoir, the river regime in the Lower Yellow River has experienced some changes because of the reduced discharge and sediment loads. According to the river regime maps, the wandering features of the Lower Yellow River are inhibited and the river channel is becoming stable. In addition, the fractal dimension method is introduced to discriminate the river regime. The river fractal features are able to reflect the features of river system and the fractal dimension is an important variable that can reflect the fractal features. Based on the basic principle of fractal theory, the fractal dimension method is applied to discriminate the river pattern evolution of the Lower Yellow River. The results show that all the fractal dimensions of the three studied reaches decrease from 1-1.35 before 2004 to less 1.05 after 2004, indicating that the river regimes are becoming more regular. It means that the discrimination results fit well with the facts and the fractal dimension method is suitable for the river pattern discrimination.
Stress and Displacement Analysis with Multiple Loads
Authors: Zhang Dong Liang , Wang Bin Wu , Liu Fei
Published: July 2012

This paper analyses the stress and the displacement with multiple loads by the structure of the linear static. Use the static solver provided by UG NX Nastran; get the parameters of the stress and the displacement of the component with some kinds of loads. Not only get the result for each subcase, but also for any subcase in the combined quickly. It provides facilitation for comparison and analysis of each subcase and the combined case on some calculation results.
Design and Manufacturing of the Transmission of Rotary Tiller
Authors: Zhang Chun Li , Li Ru Qiong , Shen Hui
Published: July 2012

The application of Spiroid gears to rotary tillers is proposed. The research on the design and manufacturing of the transmission of rotary tillers is developed. The work hopes to be a good practice for better load capacity, mechanical performance and wear resistance of rotary tillers.
Foundation Design for Reciprocating Compressor
Authors: Deng Geng Qing , Wang Rong
Published: July 2012

The problem of the foundation design of the reciprocation compressor with four cylinders is investigated. Some useful terms are retained, which include possible vibration modes, fatigue failures, environmental demands etc. The selection foundations are typical and commonly used in many industry plants. Cross references have been made to other parts of the paper at each design step in order to illustrate the utilization of previously derived formulae.
Research on Flow Field and Temperature Field Characteristics of One Rocket Charge with Complicated Structure by Numerical Method
Authors: Li Jie , Zhu Yong Hong
Published: July 2012

The paper researches flow field and temperature field characteristics of one rocket charge with complicated structure by numerical method. The charge, in which there exist the conduction, convection and radiation, consists of the metal shell, seven propellant columns and air gaps. For the reasons, to solve temperature field of the charge is to solve a complex heat transfer problem in a complicated calculation region. A mathematical and physical model for the flow and heat transfer process in the charge is established and unstructured meshes are applied to disperse the complicated calculation region. The SIMPLE algorithm is used to solve the partial differential equations, and the calculation results are in good agreement with the experimental data. On basis of the numerical simulation, the flow field and temperature field characteristics of the charge are researched and subsequently some valuable conclusions are gotten.
The Surface Characteristic of the Film Flow under Different Surface Tension and Uneven Bottom
Authors: Liu Mei , Wu Zheng Ren
Published: July 2012

In the paper, with the change of the relation between the Bond numbers and 1/3, the different control equations with different dispersion item was obtained for the surface wave of film under uneven bottom. The equation under tension and bottom was reduced from the potential flow theory with the little parameter perturbation technique, and then was solved by using the numerical method. The waterfall of the surface wave was simulated with Matlab software. The results show that different surface tension and different bottom has different effect on the film surface.
Vortex Tube Expansion Transcritical CO2 Heat Pump Cycle
Authors: Liu Ying Fu , Geng Chun Jing , Jin Guang Ya
Published: July 2012

The application of natural refrigerant CO2 is of great significance to reduce the greenhouse effect and ozone depletion. Transcritical CO2 heat pump cycle is presently an important aspect of natural refrigerant alternatives research. In this paper, a vortex tube expansion transcritical CO2 heat pump cycle is established and compared to that of the transcritical CO2 refrigeration cycle with throttle valve. Thermodynamic analysis results indicate that the system performance of vortex tube expansion transcritical CO2 heat pump cycle is better than the transcritical CO2 heat pump cycle with throttle valve, and the COPh improvement is 5.8%~13.9% at given conditions. The gas-cooler outlet temperature has a great impact on the system performance, there is a higher COPh improvement when the cycle at lower evaporation temperature or higher gas-cooler outlet temperature.
A Study on a Passenger Car Diesel Engine Fueled with Butanol-Diesel Blend under Typical Operating Condition
Authors: Zhou Ting Bo , Han Zhi Yu , Chen Zheng , Du Biao , Liu Yun
Published: July 2012

The effects of butanol-diesel blending ratio, injecting timing and pilot injection quantity on combustion and emissions were experimentally investigated for a passenger car diesel engine. The results showed that under the typical operating condition of 2000r/min engine speed and 0.2MPa BMEP engine load, the engine’s combustion phase retarded, the peak combustion pressure and maximum in-cylinder mean temperature decreasing with the delay of the main injection timing using both the neat diesel and diesel-butanol blends. And the engine smoke level increased, while the NOx and CO emissions decreased. However, at the same main injection timing, with the increase of the butanol in the blends, the ignition delay of the combustion prolonged, the burn rate and brake specific fuel consumption increased, NOx and soot emissions decreased, and HC and CO emissions increased, while the peak in-cylinder pressure was slightly influenced. The results of this study indicate that the selection of the butanol-diesel blend ratio and injection timing should consider the engineering balances among the engine’s fuel economy and emissions.
Disquisition of Testing System for BMBS Vacuum Booster
Authors: Shi Yan , Lu Yi , Wang Xue Ying
Published: July 2012

To solve the problem of testing BMBS (BLOW-OUT MONITORING AND BRAKE SYSTEM) vacuum booster performance, a double-station and on-line test system for BMBS vacuum booster was designed. It adopts high-speed data collection method and computer control technology. This system can test the performance in non-BMBS condition and BMBS condition. The test items mainly include dynamic characteristic and sealing performance under each condition. The double stations are independent and have no interference with each other. The system fills up the blank of performance testing about BMBS vacuum booster. To verify this system, experiments were conducted with the vacuum booster which installed the BMBS technology. The experiment results show that the system can do well in testing the performance of BMBS vacuum booster in high precision. The sealing performance resolution is 0.01kPa and the pressure resolution is 1N.
Research on Dropwise Condensation for Binary Mixed Vapor
Authors: Hu Shen Hua , Ma Xiang Rong , Wu Fan
Published: July 2012

An experiment for Marangoni condensation of ethanol-water mixtures was carried out and the departing radius and drop size distribution on vertical surface was presented. An amended formula was obtained after considering the effect of ethanol mass concentration, vapor velocity and condensing temperature difference based on Le Fevre’s formula concerning departing radius of pure water, The calculations were in good agreement with experimental result, had a maximum error less than 23%. Owing to the significant effect on drop size contribution, vapor velocity was introduced into Rose’s formula, and the correctional result compared well with the experimental data.
Research on the Time-Frequency Analysis Method to Extract Early Fault Features of Rotating Machinery
Authors: Ju Ping Hua , Zhang Gen Bao
Published: July 2012

Early fault features of rotating machinery is very weak and is disturbed by strong noise generally. how to more accurately extract early (weak) fault features from signals is still a hot and difficult point of research of the discipline. An intensive study is given to basic features of rotating machinery early faults and common diagnosis method, And also summarized the research status of early diagnosis in the field of mechanical equipment signal feature extraction and fault diagnosis, analyzed the current problems, and finally briefly pointed out the development of early fault diagnosis in machinery applications.
OSG-Based Modeling of the Flexural Deformation of the Crane’s Main Arm
Authors: Deng Qian Wang , Wu Ze Wu , Fan Qing , Hu Yu Ru
Published: July 2012

Because of the large deflection deformation of crane’s main arm, it is difficult to display the real-time shape of the crane’s main arm and also is necessary to display the deformed main arm to increase the realism of the system in the development of a system platform to simulate crane operation in practical situation. There is a few research in this area, therefore the study of the flexural deflection of the main arm of crane modeling method has important practical significance for engineering. This paper first briefly introduces the main arm of crane's deflection numerical calculation theory, then explores the application of OSG through three different ways to establish the occurrence of deformation model of the crane’s main arm, then compares their advantages and disadvantages, and finally finds that the display effect by the wire frame method to establish the occurrence of flexural deformation model of the crane’s main arm is the best, and gives a simple example to illustrate that.
Rough Set of Optimized Probabilistic Neural Network in Identification of Blue and White Ceramic from Jingdezhen
Authors: Wang Hua , Liang Hua Ying , Liu Bing Xiang
Published: July 2012

The chemical composition is usually acquired by various scientific analyses in blue and white ceramics researches from Jingdezhen,then they are classified and catalogued by the calculation based on some proper mathematical model,finally the discrimination functions can be got. This paper introduces the rough set theory and probabilistic neural network for some of the basic concepts, and give the optimal probability rough set neural network method to establish the Jingdezhen blue and white porcelain dating model the basic steps and the pottery chemical composition data processing method, through the application examples, it shows that the methods of Jingdezhen blue and white dating of ceramics research results to achieve the expected purpose.
Simulation Analysis of Parallel Cluster Tools in Semiconductor Manufacturing
Authors: Zheng Xiu Hong , Zhang Ke Fei
Published: July 2012

High throughput is critical to the success of semiconductor manufacturing. The complexity of cluster tools leads to higher throughput an increasingly challenging task. To compute the throughput of the cluster tool and simulate the system operation procedure, the simulation platform, named as ClusterSim, is developed. Moreover, the paper analyzes the performance of the parallel cluster tools by this platform and valid the simulation results using the theoretic model. The result shows that ClusterSim provides an effective tool for users to quickly evaluate many possible equipment configurations
Simulation and Modeling Method for Micro Turn-Milling Cutting Process
Authors: Zhao Zeng Wu , Jin Xin , Zhang Zhi Jing , Sun Xu Yao , Deng Yong Jun
Published: July 2012

A simulation and modeling method for micro turn-milling cutting process was investigated to predict the impacts of cutting speed and cutting depth on cutting force. Based on material Johnson-Cook constitutive model and chip separation criteria, the finite element model was established in ABAQUS simulation application, then the model analysis and experiment verification was conducted. The results indicate that the simulation model can predict the value and regularity of cutting force, which can provide guidance on process optimization and machining accuracy control.
Study on Welding Process of Clutch Wheel-Hub Weldment Using Vacuum Electron Beam Welding
Authors: Wang De Quan
Published: July 2012

Abstract. In order to resolve the manufacturing difficult problem of a new kind of clutch wheel-hub weldment of a new type of engineering machinery, and ensure the manufacturing precision and welded joint quality, a new manufacturing process was studied using vacuum electron beam welding (VEBW) for the manufacturing of this component. Static torsional strength was measured on static torsional testing machine. Microstructure morphologies of welding seam and heat affected zone were analyzed using scanning electron microscope. Vickers-hardness values of welding seams and heat affected zones were measured using Vickers-hardness tester. As a result, the welding process and the optimum technological parameters of VEBW of the weldment were obtained.
The TCA of Hypoid Gears Based on MATLAB
Authors: Xiao Miao Xin , Yan Hua Ru
Published: July 2012

The present situation of the tooth contact analysis (TCA) and the application of MATLAB to the tooth contact analysis (TCA) is introduced briefly in this paper. The tooth surface equation of the big gear and pinion is established by powerful mathematical calculation and graphic display of MATLAB, at the same time transmission error and contact path is obtained. The calculation process is simplified and the operation precision of TCA is improved than before.
Virtual Prototype and Modal Analysis of Stator System of Large Turbo-Generator
Authors: Wang Yi Xuan , Wang Ying , Lin Li
Published: July 2012

The stator core is an important part of large turbo-generator .The its natural frequency must be to avoid the operating frequency and the double frequency. In this paper, stator core structure of 1000MW generator is considered as the research object. In the Pro / E software, its virtual manufacturing model is built for design and manufacture of stator core; In ANSYS software, a parametric finite element model is established for virtual experimental modal analysis; The virtual prototype model in the different constraints (free, and different constraints) and different core parameters (such as the core inner and outer diameter, length) is used to analyze and solve its natural frequencies and mode shape changes. For design, manufacturing and on-line monitoring and fault diagnosis of a variety of large-capacity turbine generator, the research approach and results provide an important basis.
Design and Implementation about Virtual Experiment for Lift Coefficient Mensuration
Authors: Ming Lei , Li Song , Yin Ji Xin , Hu Tie Yu , Wang Zhi Ke , He Peng
Published: July 2012

As a rising practical teaching method, virtual experiment is playing an increasingly prominent role in modern teaching. The virtual experiment for lift coefficient mensuration, which is one of a series of virtual experiment software that have been accomplished based on numerical simulation and modern computer technologies by the authors, was taken as an example, the design principles, modules constitution, developing tools, and experiment courses were introduced. It is of practical significance on how to make use of virtual experiment technology to reform practical teaching and enhance energy efficiency ratio of experimental teaching.
Determination of Parameters in Compound Fill Sphere Model for Haptic Interaction
Authors: Liu Yong , Zhang Yan Chao , Chou Wu Sheng
Published: July 2012

The compound Fill Sphere Model (cFSM), which is an extension of common Fill Sphere Model, is widely used in real-time haptic interaction with deformable body. Comparing with finite element based model, the simplicity and efficiency are advantages of cFSM. However, determining implicit parameters of cFSM is a difficult task since a vivid deformation should be attained during haptic interaction. In this paper, to improve the simulation precision, parameter matrices of the cFSM are identified through an analytical method for the first time to our best knowledge. After deriving parameter matrices by linearization, the stiffness matrix, damp matrix and mass matrix of the cFSM are obtained by minimizing errors between stiffness matrix of the Finite Element Model (FEM). In order to evaluate the performance of derived parameters, comparative experiment has been conducted between the cFSM and FEM. Additionally, based on the derived parameters, a real-time haptic interactive scenario is constructed to validate the performance of deformation simulation.
Modelica-Based Simulation of Fuzzy Temperature Control System in Virtual Experiment
Authors: Lu Jian Feng , Xiao Ling Hui , Su Rong
Published: July 2012

A fuzzy temperature control system is modeled and simulated in Modelica language，all of the system is mainly composed of heating tank, heater, fuzzy controller, electric valve and sensor. Every component is modeled separately in OpenModelica and created its MO file which is based on the component’s mathematical model and data parameter, and will be packaged into an xml file by Flex-plugin; finally, these parts are connected to an overall simulation system. The result of simulation is showed that this model is correct, and meets the control demand of fuzzy temperature control system． Key words: Modelica; fuzzy temperature control system; Mo file
Parameter Identification Research Based on ARX Model
Authors: Liu Huai Yuan , He Jian Hua , Chen Song
Published: July 2012

Based on the principle of the system identification, combined Simulink with System Identification Toolbox from MATLAB, the least square estimation method is selected to establish a system of ARX model, and Akaike Information Criterion (AIC) was used in the identification of model order, compared with the original model to study the fitting accuracy, and the validity of the model is examined by residual analysis. This approach overcomes the disadvantages of the complexity and difficulty in traditional programming model. Compared to other program identification method, it has a short modeling time, and it is clear, reliable, intuitive visual, good scalability. Furthermore, the model parameters, result and system can be easily modified, assessed and verified. This method of system modeling and simulation can be used for reference to aerospace and other fields.
Research on Completeness in Decomposition and Composition of Petri Nets
Authors: Hou Chun Long , Ma Zeng , Qi Xin Zhan
Published: July 2012

Composition and decomposition can be used in refining and combination of Petri nets. Based on the relation of in preconditions and consequences of Petri node, analysis the completeness of the composition and decomposition operation and put forward methods to improve the completeness, in this way can design correct and consistent Petri nets to describe the system.
A Fuzzy Case-Based Reasoning Model to Forecast Prices of Aquatic Products
Authors: Maharjan Rabiya , Yuan Hong Chun
Published: July 2012

Accurate prediction of aquatic product prices can improve the quality of business strategy of aquatic product market. Case-based reasoning (CBR) systems have long been intensively used in several areas of artificial intelligence. But it is difficult to cluster similar cases from case bases as there are uncertainties in knowledge representation, attribute description and similarity measures in CBR. To increase the efficiency and reliability of CBR, fuzzy theories have been combined with CBR. In this paper, fuzzy case-based reasoning (FCBR) has been developed to forecast the price of aquatic products.
Research on Construction of the Military Geographic Information System Based on Web Services Technology
Authors: Wang Hong Wei , Yang Guang , Wu He Nan , Yuan Yu Wei , Wu Jing Wen
Published: July 2012

The paper described the current situation and existing problems of the Military Geographic Information Systems in the application of our military, and introduced the Web Services technology advantages and application characteristics. At last the paper focusing on the advantages of the Military Geographic Information System Based on Web Services technology.
Research on Key Technologies for Internet of Things
Authors: Shi Guo Liang , Liu Yu Xi
Published: July 2012

For Internet of Things (IOT) widely concerned by people in recent years, this paper analyzed and discussed the key technologies of restricting IOT development, including awareness technology, network communications technology, data aggregation and intelligent technology and cloud computing and so on. These technologies will play important roles in promoting the development and application of IOT, and even human life, industrial development and the advancement of science and technology.
Study on the Computer Network of the Yellow River Reservoir Running Information Platform
Authors: Guo Qiao Ling , Huang Kui
Published: July 2012

In order to realize the optimal operation of the Yellow River groups of cascade reservoirs, it is very necessary to build the running information platform of the Yellow River reservoir scheduling. The paper introduces the overall structure design of the Yellow River reservoir scheduling running platform system, emphatically analyzes the design of network networking scheme, management system and security system in the process of building computer network systems. It provides reference for carrying out the digital watershed network design.
The Research on Behavioral Status Judgment Method Based on Skeleton Modeling and Vector Processing
Authors: Li Xiao Ping , Cui Hui Jie , Chen Si , Liang Chun Hui , Liu Feng , Xu Jian Qiang , Mao Xu
Published: July 2012

Fast, simple and reliable method for judging the behavioral status of video object is the public research base of many application fields, including public safety monitoring, national defense, aeronautics, sports and so on. This paper focuses on the fast parametric skeleton modeling and simple process of vectorization. It proposes an improved thinning algorithm for fast skeleton modeling and then locates the key points by a new scanning and marketing method, ultimately, according to the coordinate of the key points, it constructs a matrix of pose estimation and formulates the behavioral status judgment as a problem of calculating the angle between vectors. This method not only resolves the problems of large volumes of data and high complexity of algorithm in the traditional approach, but also lays the foundation for the extended researches and applications of multi-field intelligent video behavior analysis.
Based 3D Process Production Site Visualization Manufacturing Technology Research
Authors: Du Bao Rui , Wang Xi Liang , Meng Biao
Published: July 2012

Along with the development of manufacturing enterprise information deeply, production site visualization manufacturing technology is one of the key technologies of information construction, so it is concerned in many ways. Production site visualization manufacturing technology is an important technical problem that manufacturing enterprise must be faced and resolved in future. This paper started from the production site visualization of manufacturing technology, defined and built 3D process model, analysed the traditional the way of process information transferring and releasing, researched production site visualization manufacturing technology based on 3D process model, and expounded application example of the 3D process design.
Research on Embedded Computer Techniques Used in Agricultural Equipments ATS
Authors: Zhang Hai Dan , Bao Hu , Chen Den Gan , Yu Jing
Published: July 2012

VXI or PXI modules based on embedded computers are playing a significant role in test systems for both agricultural and commercial applications. In an Agricultural equipments remote diagnosis and Maintenance ATS (automatic test system), we applied ARM based VXI modules to developing an equipment called Portable Maintenance Aid Equipments (PMAE) as well as an Ethernet-based measurement system which solved a sticking point of this large-scale ATS. The main testing system is designed as a large-scale integrated test system that will perform automatic test for faulty LRUs (Local Replaceable Unit), and faults will be isolated to SRUs (Shop Replaceable Unit). PMAEs could cooperate with the main testing system in realizing remote measurement and control through virtual instrument (VI) technology, thus the localization veracity of faulty LRUs and cables could be greatly improved. ARM based embedded system was used to realize 0－slot controller as well as some dedicated test modules. It could offer maximum performance and the most compact size because they are installed directly into the VXI mainframe. Test results indicated good performance of this scheme, thereby greatly augmenting diagnostic capacity and efficiency of the Agricultural equipments remote diagnosis and Maintenance ATS.
Research on New Algorithm of Network Topology Design Based on Cloud Integration
Authors: Qu Xiao Yuan , Zhang Feng , Xue Hui Feng
Published: July 2012

Analyzed integrated logical structure of the cloud, back-end cloud computing systems, tens of thousands of servers, how to organize such a large number of servers is the cloud computing system efficient and stable operation of one of the key issues. We surveyed the requirement of cloud computing networking. Analyzed the architecture of cloud computing networking topology, and thought that the networking topology should be composed of two parts the center switch trunk and some tree shape branch subnet. Then we proposed the Self Adaptive Algorithm for the center swish trunk’s topology design based on the graph theory, optimization theory and classic greedy algorithm. Finally we do some experiments and comparison to verify the algorithm’s usability and advantages.
Finite Element Analysis on Tower Crane Based on ANSYS
Authors: Liu Qing , Zeng Yi Hui
Published: July 2012

Tower crane is a widely used lifting machinery which can be produced by several domestic manufacturers. The study on static characteristics of tower crane is widely engaged in nowadays. However, the analysis based on advanced CAE techniques is seldom used. Therefore, this paper uses ANSYS to analysis the characteristics of tower crane and the final results are well validated.
Rapid Stereotype of Cylindrical Drip Emitter Based on Computational Fluid Dynamics and Rapid Prototyping Manufacturing
Authors: Wang Li Peng , Wei Zheng Ying , Zhou Xing , Yuan Wei Jing
Published: July 2012

In the rapid development process of cylindrical drip emitter, the traditional CFD analyzing method was generally carried out based on the planar model of the cylindrical labyrinth channel. However, the result obtained by this method was obviously different with the experimental data. In this paper the cylindrical prototype of the labyrinth channel was proposed and the CFD analysis was carried out based on the hexahedral mesh of the cylindrical labyrinth channel to solve this problem. Then the flow rate and the anti-clogging performance of the emitter were predicted based on the stereo prototype of the labyrinth channel. Consequently, the simulation results were verified and the cylindrical drip emitter was finalized according to its hydraulic performance experiment.
Research on IETM Based on Ontology Integration Framework
Authors: Lu Lei , Zhang Feng
Published: July 2012

Ontology library is one of the cores of the intelligent IETM system; it is widely used in intelligent information retrieve, e-business, and network collaboration. Information retrieval and graphical representation of follow-up operation should be based on the ontology, many applications require the integrated query from related information resources, which arises the problem of semantic interoperation in heterogeneous information resources. There are many complex factors in integrating them, because different ontology creators adopt different semantics from his individual view. This paper proposes the framework of ontology integration though analyzing the problems in the process of ontology integration. The application results show that the proposed cycle evolution of ontology construction method to solve the IETM domain ontology building and storage problems.
A New Energy Saving Building Type – Cavity Construction System with Trombe Wall
Authors: Liu Yi , Yang Ding Yi
Published: July 2012

A new building type- cavity construction system with trombe wall was proposed. Solar thermal storage wall was used to heat air gap between glass and wall. Updraft passed through hollow floor and supplied heat to upper room. Heat transfer model was built and numerical simulation of this kind of buildings was done. The results showed that cavity construction system with disconnected trombe wall had appropriate air- flow organization and uniform heating effect, which had better serviceability to high-rise buildings.
Analysis of Factors Influencing on Compaction Performance of Hot Asphalt Mixtures by Orthogonal Test
Authors: Ouyang Lan
Published: July 2012

The compaction can directly affect the performance of asphalt pavement, while the mixing temperature, the molding temperature, the temperature of aggregates and the rolling times can all affect the compaction performance. The L9(34) orthogonal tests and indoor tests were used to analyze the influence of the main factors on the examination indicators. The results show that molding temperature have a significant effect on the physical and mechanical properties of SMA13 asphalt mixtures when the confidence level α is 0.10. Finally, quantitative analysis is performed to study the optimal compaction technology of molding temperature and rolling times.
CFD Analysis of Elementary-Kinetic Chemical Reactions and Effects on Transport Processes in Anodes of Solid Oxide Fuel Cells
Authors: Yang Chao , Yang Guo Gang , Yue Dan Ting , Yuan Jin Liang
Published: July 2012

Solid oxide fuel cell (SOFC) is one of most promising types of fuel cells with advantages of high efficiencies, flexible fuel types. As a device directly converting the free energy of chemical reactant to electrical energy and heat, the performance of SOFC is strongly affected by the chemical and electro-chemical reactions occurring in the porous anode coupled with mass, momentum and heat transfer processes. A 3D CFD model has been developed by using in-house code to analyze the various processes coupled with elementary surface reactions occurring in SOFC’s anode, to identify the effects between transfer processes and some elementary reactions occurring in the anode. It shows that single step elementary reaction can affect the distribution of surface species, but not remarkable on global conditions such as temperature and gas distribution. On the other hand, global parameters including temperature, porous characteristics affect the surface species distribution and elementary reaction processes largely.
Corrosion Resistant Performance of TMCP HSLA Steel for Oil Ship
Authors: Chen Yan Tang , Zhang Kai Guang
Published: July 2012

Thermal-mechanical controlled process (TMCP) has been used to develop new high strength low alloy (HSLA) steels with excellent corrosion resistant property for oil ship construction. Experiment results shown that the microstructure of the steel, which consisted of only ferrite including bainite ferrite, exhibited expected corrosion resistant performance. Higher Mo content led to better corrosion resistance.
Determination of Bisphenol A by Fluorescence Immunoassay Based on Quantum Dots as Probe
Authors: Zhang Xia , Pang Yu Bo , Song Yu Yan , Wang Shu Hao
Published: July 2012

A sensitive and selectivity fluoroimmunoassay was established for the determination of bisphenol A, on the basis of being labeled quantum dots. Anti-rabbit IgG conjugated by quantum dots were regarded as a probe in this system. The presented method produced a widely linear range from 0.0001 to 100.0 ng mL-1, with detection limit of 0.078 pg mL-1. The method was applied to determine bisphenol A in plastic leach liquor, with the recoveries from 99.8% to 102.5%. The results were similar to those obtained from a high performance liquid chromatography method, while this method is simple, rapid, sensitive and accurate.
Electroless Deposition of Silver Layer on Silicon of High Density Plasma Bombarment
Authors: Lee Yuan Gee
Published: July 2012

Electroless silver film was deposited on the Ti/Si substrate which was suffered from plasma bombardment to modify its surface chemistry. The surface tension of the Ti/Si surface was found to be reduced after plasma bombardment. After thermal annealing, the silver film was smoothened and showed a fine microstructure. However, the recrystal at high temperature annealing facilitated an increase of sheet resistance instaneously.
Flow Stress Behavior Anisotropy of Extruded 7075 Aluminum Alloy Bar at Elevated Temperatures
Authors: Li Guo Jun , Zhang Zhi Min , Yang Yong Biao
Published: July 2012

Hot compression tests of 7075 aluminum alloy were carried out on the Gleeble-1500 thermal simulation machine at strain rates of 0.01 s-1 ,0.1s-1, 1s-1 and at temperatures of 320°C,400°C,480°C. The compression direction are aligned at 0°and 45°to the axis direction of the bar. Microstructure was studied using Optical Microscopy. The results show that the true stress of both specimen increases with the decrease of temperature and the increase of strain rates. The true stresses rose rapidly to peak value and then held constant or decreased with the increase of the true strains at different deformation conditions. The yield strength and stable flow stress of the specimens in 0° to the axis direction is higher than that of 45° specimen, which could be attributed to the elongated grain structures of the bar and the texture of the extruded bar.
Fractal Characteristics of the Pore Structure of Low Permeability Sandstone
Authors: Qin Sheng Gao , Wu Hong Li , Tian Mao Bin , Wu Jing Chun , Yao Shang Lin
Published: July 2012

Based on the laboratory testing of mercury injection with natural cores of low permeability, such analyses were made as the changing law of capillary pressure curves, the distribution features of different size pores and the correlation of pore structures to inside fluid distribution. The fractal method was also used to analyze the two-section line fitting effect of the fractal dimensions and their relationship with the pore distribution laws. The results show that the low permeability reservoir has complicated pore system with high scale of fractal pores, of which the log-log correlation of SHg～Pc can be fitted well with two-section lines, and the two-sections fractal dimensions calculated have greater difference than that of medium & high permeability reservoirs. The study indicates advantages of the fractal method to describe the heterogeneous pore distribution of the low permeability sandstones.
Green Preparation of Ultra-Fine Silver Particles in Ionic Liquid
Authors: Yang Ming Shan , Quan Ying , Tang Wen , Li Lin Kai
Published: July 2012

A room-temperature ionic liquid, 1-n-butyl-3-methylimidazolium tetrafluoroborate([bmim]BF4), was synthesized with two-step method and its structure was characterized by IR, H-NMR. Putting p-benzenediol and AgNO3 ethanol solution into [bmim] BF4, ultra-fine silver powder were prepared successfully in this paper. The effects of the temperature and material mol ratio of AgNO3 and p-benzenediol on the shape of products were studied. The products were characterized by XRD, SEM, IR and TEM. The results showed that the particle size of silver was much smaller and in the range of nanometers, and had narrowly, uniform distribution, which indicates that the synthesis method using ionic liquid, is the better “green” and “environment friendly” method to prepare ultra-fine silver powder.