bluuebunny/crossref_metadata_2025 huggingface dataset:
The Research on Edged Detecting in CNC Engraving Technology Based on Reverse Engineering
Authors: Wang Chuan Qi , Zhang Jian , Wang Wei Rong , Gu Xue Jing
Published: March 2013

Currently, the ancient calligraphy and painting are widely used in decoration screen; however, the processing technic is normally based on manual manipulation. Normally, this kind of processing is not efficient, and with highly cost. In addition, it could not maintain the original artistic style in maximum. the paper proposes to process the sculpture of ancient calligraphy according to its photo, by adopting the CNC technology based on reverse engineering method, which enables to mostly keep the original artistic style, and to create the CNC code automatically with the assistant of image processing to achieve intelligent machining.
How to Guarantee the Machining Accuracy of the Improved Numerical Control Machine
Authors: Zhou Hong
Published: March 2013

Advancing the machining accuracy of machine tool is one of aim of numerical control machine improving . There are many effecting machining accuracy factors of economical numerical control machine tool driven by a stepper motor . The way of improving machining accuracy and compensation method were put forward in this paper .
The Influence of the Capacity-Increasing in the Trailing-Edge Cutting of HL240 Turbine Blade
Authors: Lin Yu , Han Shu Ren , Sheng Min
Published: March 2013

In the precondition of calculating the flow field around the blade with the singular distribution way, the hydraulic characteristic after cutting the mixed-flow blade is calculated by CFD software , the optimum value of output in HL240-WJ50 water turbine and the influence of the flow field are found out by using that way: when the cutting measure of the cutting tip is 9.4mm, the output of the rotating wheel is increased 5.7% and the characteristic of cavitations isn’t clearly worsened. The improved water turbine blade is applied to the capacity-increasing rebuild of the small electric station. The cutting measure is 5 percent of the average of the blade’s upper canopy and lower rim. The power of the rotating wheel is improved from 232KW to 253KW after cutting, and the output can reach the requirement of the electric station. So the lesser economy to the trailing-edge can get into the better goal of rebuilding, that is suitable to rebuild the small hydraulic power station’s wheel.
Research on Configuration Transformation of Cutting Machine for Complex-Surface for Metamorphic Mechanism
Authors: Hu Sheng Hai , Liu Xiu Lian , Wang Hong Guang , Zhang Xiao Dong
Published: March 2013

Through the research and analysis on the metamorphic cutting mechanism of cutting equipment for complex-surface, the configuration transformation of metamorphic cutting mechanism based on genetic evolution principles is analyzed, and the solution of the first structure is completed. the structures and configuration transformation of the metamorphic cutting mechanism is researched based on graph theory and adjacent matrix.
Optimum Design of Machine Tool Structures Based on BP Neural Network and Genetic Algorithm
Authors: Yuan Song Mei , Zhan Zhong Fei , Li Yao
Published: March 2013

In order to estimate and optimize the static and dynamic characteristics of machine tool, the full parameterized FEM model of it is established and studied in the paper. After the FEM analysis of bed, this paper takes a machine bed as example, presents a method of combination of BP Neural-Network(NN) and Genetic-Algorithm(GA) to optimize dynamic characteristics and realizes the structural optimization of the bed. It proved that this method takes less time, and more precision compared to traditional method.
System Design of Numerical Control Turret Press Based on Motion Controller
Authors: Du Yi Gang , Zhang Wen Zhi , Liu Ying Han , Jin Zhao Hui
Published: March 2013

According to the characteristics and requirements of NCT processing system, deeper research was done on the system. The three-module design has been completed based on motion controller. The first module is completed on the design of panel, key position, machine functions and coding circuit; the second module is mainly accomplished on the tool-path generation, tool adapter and program development; the last module is used to verify the NC codes. Thus the NCT processing system is improved effectively.
Research of the Atomization Characteristics of Low Pollution Air Blast Nozzle
Authors: Liu Kai
Published: March 2013

Atomization characteristic has great impact about combustion efficiency, ignition performance, and outlet temperature field of combustor. Obtained atomization characteristic about spray particle size and spray cone angle using LDV/PDPA system and the relevant software. The results indicated: particle size decrease rapidly with increasing air and tends to stabilize, Spray cone angle does not change with the air pressure. These experimental data have provided reliable basis for the nozzle group design, development and operation.
A Study on the Control of an Anchor Auto Drop System for Ship Windlass
Authors: Park Won Ho , Kang Seung Hee , Kim Chae Sil
Published: March 2013

In this research, we will perform a basic study to develop an Anchor Auto Drop System for Chain dia. Φ107mm/G3 (Refloat load 45ton) Windlass model. First of all, to evaluate the control characteristics of the Windlass, we made an analysis model using the commercial software ‘Simulation-X’. Then, we analyzed the control characteristics of the Anchor falling speed and used PID control to evaluate the falling speed control. Additionally, we analyzed the desired falling speeds of 2, 3, 4 m/s when the Anchor and all chains were a total of 44 tons in weight at 100 m distance. Also, we obtained results of Caliper brake loads and torque changes and we were able to determine that the braking pressure and torque are increased when the load is increased. We analyzed the gear load when the brake is implemented and the Anchor is at 200 m distance and has a total weight of 69 tons. And, for the winch structure design, we obtained a basic design method to develop the auto drop system for a Marine Windlass in terms of the important elements.
A Machine Vision-Based Heating Control Design for the Microwave Maintenance Vehicle
Authors: Zhang Lei , Teng Kai , Yang Li Juan , Wu Wen Jin , Qin Lu Fang
Published: March 2013

Traditionally, human vision is applied to locating the region of the asphalt pavement defects. This will bring large variations for heating control of the microwave maintenance vehicle due to a shortage of the accurate control data. In this paper, a novel machine vision-based method was proposed to produce the control data precisely for the heating control. First, a scheme of the microwave heating control system based on machine vision was proposed for the microwave maintenance vehicle. Then, for the image distortion caused by the lens, the cubic polynomial warping algorithm and the reprojection transformation method were used to rectify it. Third, from the rectified image, the automatic and the manual method extracting control data were put forward. Last, matching with the obtained control data, a circuit design was demonstrated. Product testing proves that the proposed machine vision-based method is not only prompt and accurate in locating asphalt defects, but also quite effective in energy saving.
Modeling on Inverse Dynamic Process of Cut Tobacco Dryer
Authors: Zhang Li , Lei Li , Xu Peng
Published: March 2013

The cut tobacco dryer is one of the most important process equipment in the cigarette production ,which is a typical process involving many factors such as multivariablity, strong coupling, time-varying and large time delay .Based on the identification of inverse dynamics, this paper establishes a process model related to some important parameters of the cut tobacco dryer which lays a foundation for optimizing the control parameters, increasing process efficiency and reducing the cost in the tobacco drying process.
A Study on μ Synthesis Robust Control for Independent Drive Electric Vehicle to Enhance Stability
Authors: Lin Cheng , Peng Chun Lei
Published: March 2013

This paper presents the design of μ-synthesis control for Independent Drive Electric Vehicle, Applying this method, external disturbances and model uncertainties can be taken into consideration. The controller is set up based on the toolbox of MATLAB/SIMULINK and the weighting functions selection is discussed according to the actuator and the control performance index. In order to investigate the feasibility of the controller, simulations with different velocity and disturbances were employed, the simulation results show that the proposed controller can keep the car against modeling error, external disturbances and get good handling performance.
Research and Exploration of Intelligent Brightness Control
Authors: Liu Bing , Wu Tao , Du Hao , Xiang Zhi Qiang , He Chun Hua
Published: March 2013

With the development of science and technology, the requirement of intelligent control and energy save increases rapidly. From the above two points, a new design scheme of LED light brightness control is proposed in this paper. The brightness would be kept constant in the designated region. The constant brightness is realized by the illumination of the surrounding and LED light. The total circuit includes detection circuit and control circuit. The detection circuit is used to examine the outside brightness and transfer information to the control circuit. The control circuit determines the current of LED light.
Designing of Belt Speed Detection System Based on PLC High-Speed Counter
Authors: Shen Xiao , Fu Zhou Yu , Sun Zhao Yang , Su Pei Pei
Published: March 2013

According to slipping between the driving drum and the belt in motion of the belt conveyor, this article uses the intelligent speed sensor to transfer pulse signal into PLC high-speed counter, then realizes the relevant control through program processing and real-timely shows the value of the belt speed by text display. It completes the detection and display of the belt speed by real-timely, realizes the integration among the belt speed monitor and other control parts, reaches the purpose of slipping protection.
Study on Intelligent Monitoring for Cooling System of Power Transformer
Authors: Chen Guo Jin , Xu Ming , Liu Ting Ting , Ni Jing , Xie Dong , Zhang Yan Ping
Published: March 2013

On the basis of studying the transformer condition assessment, the paper put forward the monitoring framework of the transformer cooler based on the intelligent electrical grid, and developed the intelligent monitoring system of the transformer cooler based on the DCS and dual PLC. The system used the DCS and dual PLC redundancy, the intelligent controller of the motor, the system’s platform for the centralized monitoring, the environmental control system and the other advanced technology, and implemented the monitoring, remote control and status monitoring of the transformer cooling system to improve the reliability and adaptability of the transformer cooler system. The system can be applied for the intelligent electrical grid. The above technologies are innovative in the high-performance distributed bus, the integrated design of three-phase solid state relay and magnetic latching relay and the cooling technology of the semiconductor in the PLC module, and lie in the leading domestic level.
A PLC-Based Fuzzy Control System for ESP
Authors: Tian Fang Yong , Xiao Ji Wei , Chen Chuan Dong
Published: March 2013

With the oilfield development entering into high water cut stage, ESP (Electric Submersible Pump) was widely used with its strong oil recovery capacity. At present, there is a big gap in ESP control technology between ours and overseas, the traditional line frequency control failures frequently, has low system efficiency, serious energy waste and high operation cost, and frequency conversion control can't real-time automatic adjustment. According to these existing problems, fuzzy control was introduced into ESP system control, a fuzzy control algorithm was put forward by this paper, then fuzzy controller was realize by using PLC programming. This control system not only reserved the flexible, reliable and strong ability to adapt characteristics of PLC control system, and improved the of intelligence level of the system. Ensure esp real-time efficient and reasonable operation, prolong operation life, and enhanced. With this control system, ESP can real -time run efficiently, prolong the operating life, enhance the system efficiency, save energy and reduce consumption
Numerical Study of Pressure Loss in Ceramic Bed of Thermal Flow Reversal Reactor
Authors: Gao Zhen Qiang , Liu Rui Xiang , Liu Yong Qi
Published: March 2013

This paper describes the use of a commercial CFD code, FLUENT, to model fluid flow in thermal flow reversal reactor (TFRR) for lean methane oxidation. A two dimensional model is used. Pressure loss in ceramic bed of TFRR was focused on, and the effects of main factors are presented. The results show that the contours of static pressure in ceramic bed are slightly inclined due to the gradually variation distribution of velocity; the pressure field in distributing header is more uniform than that of collecting header; the ratio of header’s height to ceramic length influences the pressure loss most and with the increase of the ratio the pressure loss of TFRR decreased dramatically; the pressure loss increased with the increase of volume flow rate. The structure of headers is the most important factor which affects the pressure loss of TFRR.
Optimization Control of Ice Storage Air-Conditioning System
Authors: Wu Ting , Wu Gang , Bao Zhe Jing , Yan Wen Jun
Published: March 2013

Ice storage air-conditioning system can bring benefits to power supplier and consumers for its advantage of shifting power consumption at peak hours during day to the off-peak hours at night. In this paper, we adopted an improved particle swarm optimization algorithm to develop an optimal control strategy for ice storage air-conditioning system with the aim of minimizing operation cost subject to various operational constrains. Comparing with the usual chiller-priority and ice-storage-priority control strategy, the proposed control scheme can not only meet the building cooling load but also achieve the minimum operation cost.
Realization of Maximal Wind Energy Tracking Control Subsystem Based on RTDS
Authors: An Ran Ran , Hu Yu Lan , Ding Tao , Zhong Jia Yong
Published: March 2013

The paper introduces the theory of maximal wind energy tracking based on wind turbine aerodynamic theory, based on which methods to realize are provided and control subsystem is build on RTDS. Simulating results on RTDS, of whole DFIG wind generating system, showed the method is feasible and the control subsystem is correct and effective.
Based on the Application of Self-Learning Fuzzy PID Control in Tension Control System
Authors: Mao Gang Yuan , Wu Mei , Liu Hui Kang
Published: March 2013

Tension control system is one of the widely used systems in modern industrial control systems. In tension control system PID parameter setting is one of the main problems affecting the control system performance. However, conventional PID parameter is difficult to set. This article describes a PID fuzzy controller based on adaptive learning, which can change according to the deviation and deviation rate to adjust parameters in real time. Practice shows that such self-learning fuzzy PID controller has better control performance than conventional PID controller in tension control.
Research and Development of Microcomputer Control Pneumatic Technology Comprehensive Experiment Equipment
Authors: Gao Pei Chuan
Published: March 2013

To meet the experimental requirements of university, we develop a new pneumatic circuit using the PLC control directly drive a large number of low power electromagnetic valves that execute components’ (straight cylinder, cycloidal cylinder) action by computer programming control, through the RS - 232 and PLC communication. This pneumatic circuit has integration of machinery and electricity, which has been proved to be a very good experimental instrument.
The Research on Automatic System for Drawing Water from Source Based on Configuration Software
Authors: Zhang Jian , Wang Chuan Qi , Wang Wei Rong , Gu Xue Jing
Published: March 2013

Currently, it is quite popular that to acquire water straightly from the source to supply the city, in China. However, all this kind of water needs to be cleaned before using; therefore, an efficient system for filtering water in the water-drawing procedure has been addressed in this paper. The system adopted the configuration software as the interface for management which was installed in the upper computer, and various PLCs as the controllers for the master stations and sub-stations respectively. The control method and the structure of its hardware and software in electrical system would be discussed in detail, and the paper would provide a general intelligent control system model for filtering water.
Sevorel Conclusions of Guaranteed Cost for Uncertain Discrete Singular System
Authors: Jiang Jun Na , Mi Xue Yu
Published: March 2013

In this papar we research the guaranteed cost control for a class of norm bounded uncertain discrete singular systems was considered in this paper. The objective is to design state-feedback controllers such that the closed-loop systems is regular, causal, stable and the corresponding cost function have a certain upper bound minimized for all admissible uncertainties. Two sufficient conditions for the existence of state-feedback guaranteed cost controllers are obtained in terms of algebraic Riccati equation and linear matrix inequalities, respectively. And the numerical examples show the validity of our inclusion.
The Application of New Reagent in the Copper Wiring CMP
Authors: Wang Juan , Niu Xin Huan , Jiang Xia , Liu Yu Ling
Published: March 2013

At present there are many challenges in the acidity slurry used widely. And the toxic BTA with side effect must be used in the international. So the component of slurry must be improved. The new reagent is studied. It makes the slurry alkalization. It also has the using as a pH adjusting agent, complexion agent of copper ion, multi- metal chelating agents, aminating agent of acidic oxides, pH buffer, stainless steel corrosion inhibitor, the active agent and pro-oxidant. It improves the property of slurry and solves many different of acidity slurry. The alkalinity slurry contained the multi-hydroxyl polyamines is environmental、inexpensive and composition- simplified. The slurry with it can achieve the high speed and high flat. In the same time the low pressure and the little abrasive can be realized, which provide the new material for the removal of copper film.
Investigation of the Temperature Character of IGBT Failure Mode Based the 3-D Thermal-Electro Coupling FEM
Authors: He Pu Zhen , Zheng Li Bing , Fang Hua Chao , Wang Chun Lei , Hua Jun
Published: March 2013

Al wire bonding lift-off and solder delamination are the main failure modes of IGBT module. When the severity of the failure mode is different, the temperature character of IGBT is also different. This paper presents a methodology based on 3D electro-thermal coupling finite elements modeling intended to analyze the relation between the failure degree and the temperature, and compares the influence degree of two kinds of failure modes to the performance of IGBT module. The results suggest the bonding lift-off has more influence than the solder delamination on the same load and boundary conditions. This method and the corresponding results help to evaluate these failure modes how they influence the performance of IGBT, determine the failure, establish the failure standards and find the optimization of structure design.
Accurate Designing of Flat-Walled Multi-Layered Lining System Using Genetic Algorithm for Application in Anechoic Chambers
Authors: Dabbagh Vahid , Keshavarz Reza , Ohadi Abdolreza
Published: March 2013

In anechoic chambers, the flat-walled multilayered acoustic lining systems are cheaper and easier to install than conventional wedge type systems. Sequence, material and thickness of layers are all design variables. By choosing the right configuration, the acoustical performance and overall thic- kness of flat-walled multilayered systems can be comparable to conventional wedge systems. In this study, the materials considered include air and poroelastic materials such as polyurethane foams, melamine foams, and glass wool. In order to evaluate acoustical performance of a given configurati- on, the poroelastic materials are modeled using Biot’s formulations instead of a simpler impedance method to get more accurate results. A genetic algorithm implemented within ModeFRONTIER opti- mization software was used to select configurations which have a cut-off frequency of 100 Hz or less. The configuration that met this requirement with the smallest overall thickness was determined optimal. This configuration has an overall thickness of 65.8 cm and is composed of 4 different polyurethane foams. Since a considerable difference was observed between the cut-off frequencies obtained using Biot’s model and the simpler impedance method, this justifies the use of Biot’s model in the optimization.
A Small PV Temperature Control System
Authors: Du Shuai , Liang Hong , Lu Yu Jia , Zhang Yuan
Published: March 2013

This paper presents a method small TEC temperature control system that is based on photovoltaic power generation technology. And their working principles are analyzed, and equivalent circuit diagrams are given at different working mode, at last simulation and experimental results are presented to verify the fact that the principle is correct.
Integration Expression and Convergence Characteristic of Airfoils for Mixing Impeller
Authors: Wang Xu Dong , Wang Li Cun , Xia Hong Jun
Published: March 2013

To improve efficiency of industrial waste oil purification, high performance stirrer is required in the former processing. As a key part of the mixing impeller, the characteristic of airfoil shape is investigated in this paper. Firstly, the integration equation of impeller airfoil is presented. Then with different number and value of equation coefficient, three typic airfoil profiles are plotted. Lastly, one NACA airfoil is chosen to shown the integration and convergence of the expression.
The Design of 12-Channels Acquisition and Storage System Based on FPGA and AD7492
Authors: Zhang Hui Xin , Meng Xiang Jiao , Li Xiang Hong , Li Bin
Published: March 2013

This paper introduces the principle and realization process of multi-channel data acquisition and storage system based on FPGA, A/D converter, FLASH and USB microcontroller. The system’s controlling core is FPGA. FPGA finished the switch of the multi-channel analog switch、A/D conversion、data compilation and storaging in the FLASH and uploading the data to PC by USB microcontroller. Test result can indicate that the system is simply and practical .The system can finish the real-time acquisition and processing for 12 input signals, sampling rate up to 1MSPS.
Cooperation Efficiency Analysis for Bargaining Based Assembly Scheduling
Authors: Chang Tian Tian , Zhang Ji Hui , Wang Li Li , Ma Qing Yue
Published: March 2013

Cooperation between schedulers plays a key role in supply chain manufacturing. We studied the assembly scheduling system where the non-dominator suppliers cooperate in a bargaining way. Regarding different combinations of the bargaining power factors, the efficiency of cooperation was investigated by numerical experiments. Study shows the relation between the bargaining power and the efficiency.
Production Planning Optimization in F Company: A Scheduling Theory Case Study
Authors: Zhang Chi , He Zhen , Ruan Yuan Peng
Published: March 2013

Scheduling is an effective optimization methodology which has been widely used for production planning. This paper presents a scheduling model to optimize the output of an assembly line in F Semiconductor Company in Tianjin, China. The authors formulate the optimization problem as linear programming. The model and its implementation are described in detail in this article. The optimum production allocations have been founded by the scheduling model and the output has been increased.
Three Dimensional Assembly Tolerance Analysis of Gear Drivetrain
Authors: Li Xiao Long , Li Gui Hua , Wang Jun Ying , Wang Hui
Published: March 2013

Assembly accuracy has a crucial impact on the movement, load and fatigue of gear drivetrain. In this paper, a methodology on the accuracy prediction and control of complex drivetrain is presented. The proposed approach tries to simplify the assembly tolerance computation but grasping main assembly error factors in the assembly process of gear drivetrain. Jacobian -Torsor method is used in the analysis process, and results show a proper performance which indicates a potential opportunity for further deep and wide research on the 3D assembly analysis and simplification method.
Research on Open Shop Scheduling Based on Genetic Algorithm
Authors: Zhan Yong , Zhong Yu Guang , Zhu Hai Tao
Published: March 2013

Open shop scheduling problem is a typical NP problem with wide engineering background. It is of importance with respect of theory and application. In this paper, a mixed integer programming model was established with the objective to minimize the makespan based on the characteristics of the open shop, and a evolution genetic algorithm(EGA) was proposed. The representation of chromosome used in this paper was composed of two layers: operation layer and machine layer, which can be encoded and decoded easily. In generating initial population, DS/LTRP heuristic was used in order to improve the quality of the population. And particular crossover operation was proposed, which generated multiple offspring at a time, so that the efficiency of the algorithm can be well improved. At last, the proposed algorithm was tested on taillard benchmark, and numerical example showed good result.
Computer-Aided Production Control of Automobile Injection Molds Based on Process Perception
Authors: Ni Jun , Tang Wen Cheng , Xing Yan
Published: March 2013

This paper focuses on major issues in production process control of automobile injection molds based on process perception, such as manufacture resource perception, exchange in three-dimensional model (3D), production planning and scheduling, manufacture process planning (tool path and assembly sequence). After a survey of them, we propose a method for the construction of computer-aided production process control platform. 1) Define the networked manufacture semantic/data model and an encapsulating approach to efficiently manipulate manufacturing resources. 2) Develop structural multi-view data models for the design information of automobile molds transferring in 3D. 3) Propose a production planning and scheduling arithmetic. 4) Develop a variation accumulation model for manufacturing process control. 5) Integrate the tool path and assembly sequence planning of injection molds by using a variation accumulation model. 6) Integrate the existing and/or developed models to the new system. Finally we introduce a validation method and discuss the prospect to the accurate control of production process.
Influence of Material on Automotive Crash-Box Crashworthiness Subjected to Low Velocity Impact
Authors: Liu Yan Jie , Xia Chun Yan , Ding Lin , Liu Chun Hua
Published: March 2013

Crash-box equipped at the front end of a car, is one of the most important automotive parts for crash energy absorption. In case of frontal crash accident, it is expected to be collapsed with absorbing crash energy prior to other body parts so that the damage of the main cabin frame is minimized and passengers may be saved. Crash-box usually was made a mental thin walled tube. In the paper, automobile crash-box at low-velocity impact was studied by using Finite Element Method. The FE model of the tube was validated by comparing the experimental results and FE model results. Results show that on average the difference of these was within 10％.The good correlation of results obtained show that the numerical analyses are reliable. Crash-box of carbon steel and aluminum alloy materials are compared, it indicates that the peak impact force and maximum energy absorption have certain effect to energy-absorbing component with different materials.
Cubic Polynomial Trajectory Planning Algorithm Based on Ideal Drive Force for Aircraft Fusagle Automatic Position and Pose Adjustment
Authors: Zhu Yong Guo , Huang Xiang , Qing Guo Hua
Published: March 2013

In order to ensure the stationarity of the aircraft fusagle automatic adjustment and reduce the fluctuation of the drive force, the redundant actuation optimal algorithm is presented in this paper. Firstly, using Newton-Euler method, the dynamics equations of pose adjustment system are established. Based on the equations, the driving forces can be sovled. Secondly, according to the constraint conditions and pose adjustement process, Cubic Polynomial trajectory planning algorithm is proposed for the aircraft fusagle automatic adjustment. Thirdly, in order to reduce the fluctuation of the drive force, the redundant actuation optimal algorithm is presented. Simulation results show that the presented trajectory planning algorithm has good dynamic characteristics and satisfies engineering requirements. Moreover, the differences between the solutions of optimal algorithm and ideal drive forces are much less than the differences between the minimal norm least square solution and ideal drive forces.
The Research and Structure of the Dynamic Workflow Engine
Authors: Yin Qi , Hu Ji
Published: March 2013

Workflow management technology is an important computer technology in enterprise business process management. At present, there was a few of Workflow Engine which supported BPEL4WS specification. Base on the current research case of workflow, the aim of our study bring a Workflow platform support BPEL4WS Specification.According to the analysis of the web service’s new features and issues, we look into the dynamic workflow based on web services from the angles of service-oriented. We introduce the basic concepts, elements , activity, fault handler and compensate mechanism of BPEL4WS.This paper presents a design schem of framework of a web service-based dynamic workflow engine.
A Trust Model Award Content Security and Rating Supervision Model
Authors: Zou Hong , Wang Tian , Wei Li Hao , Cui Lei
Published: March 2013

With the rapid expansion of negative information in the Internet, the content rating technology is developed. This paper proposed a rating supervision model based on content rating considering trust model. We firstly analyze the behavior and reputation of network entities from the following dimensions: data dimension, time dimension and application dimension, and then applied artificial neural network to construct the trust model referred to the trust relationship in human society network. At last, we proposed the rating supervision model based on the trust model. It is proved that the rating supervision model can not only meet the standard of PICS, but also take the behavior and reputation of network entities into consideration. As a result, the rating supervision model can provide a variety of security services to enhance the credibility of the information by combination of rating label and network entity reputation.
Safety Information Dissemination Path Prediction in High-Density Vehicular Wireless Networks
Authors: Qiu Gong An , Zhang Guoan , Zhang Xiao Ge , Liu Min
Published: March 2013

Many safety applications needed safety warning information to be disseminated to all vehicles in an area quickly. A path prediction model was built from the fused evidences by evidence theory, in which the basic probability assignment function of the local load and the old path load could be achieved using fuzzy set. And the loads became the evidences of the dissemination path prediction respectively. The prediction result with the maximal confidence was regarded as the quasi-real-time dissemination path load. Simulations show that the average end-to-end delay of safety information under heavy load with path prediction is less than the half of the delay without path prediction. However, the average packets loss rate of two schemes is almost the same.
Analysis and Research of BPF Filter Based on Libpcap
Authors: Yin Zhi Jian , Zhang Hao , Liu Qi
Published: March 2013

this paper analyzes and studies nature of BPF filter based on Libpcap, first of all, it analyzes location and structure of BPF filter in the Linux system kernel; secondly, it gives a detailed analysis of how BPF deals with filter described by a high-level language; finally, a filter described by a high-level language is presented, and a application program uses this filter to capture required network data packet.
Survey on the Web Services Security Specifications
Authors: Zhang Xiao Fen , Hou Yi , Ma Jia Lin
Published: March 2013

Web Services security specifications include SSL/TLS (Secure Socket Layer/Transport Layer Security), XML Encryption, XML Signature, WS-Security specification family, PKI-related specifications etc. SSL/TLS are implemented in non-XML frameworks at the transport level, and others are implemented in XML frameworks at the application level. These specifications can satisfy the different requirements of Web Services security (confidentiality, integrity, authenticity, authorization, authentication and nonrepudiation). XML-based specifications are propitious to the integration and interoperability of Web Services security. SSL/TLS is sufficient for the basic generic security of internal Web Services projects. WS-Security is probably overkill, especially with the heavy XML processing that is involved in WS-Security.
Research on Database for Aluminum Alloys
Authors: Yuan Du , Gu Ping , Zeng Jian Min , Chen Ping , Zheng Yu Lin
Published: March 2013

An overall description of the structure, main module function, database design and implementation of the Aluminum Alloy Data Management System (AADMS) is presented in this paper. AADMS is developed by JavaEE multilayer distributed model which includes client, web, business and EIS (EIS: Enterprise Information System) layers. This model can separate the complex business logic and data access logic from the client, enhancing the reliability, portability and expansibility of the system. The system provides scientific classification and management methods for general aluminum alloys, and accomplishes a highly efficient query function for materials and process information.
Research on Search Engine Marketing for Small and Medium-Sized Material Enterprises
Authors: Sun Jian , Xie Guang Ying , Zhang Yao Li , Chen Jing
Published: March 2013

This paper introduces the weakness of small and medium-sized material enterprises first, and then analyzes the primary component of search engine marketing according to the experience of the authors and other scholars. Combined with the practical situation of small and medium-sized material enterprises, this paper proposes to do search engine marketing from the angle of search engine optimization, paid listing, search engine blog marketing and search engine community marketing. Among them, search engine optimization as the major part of search engine marketing is introduced in detail and applied with specific instructions.
Model of the Enterprise Value Management System
Authors: Yan Bo
Published: March 2013

This paper is to explore how to apply the research achievement to the development of the real estate knowledge management system. It will give the design principle and the frame of the real estate knowledge management prototype system based on the knowledge acquisition methods based agent cooperation search model and genetic algorithm based knowledge discovery method, and the design plans of its major modules. The prototype system's objective is to verify the feasibility of the design plan of the real estate knowledge management system to develop in the future.
Frequency Response Calculation of Multi-Span Simply Supported Bridge
Authors: Ma Qing Qing , Zhang Hong Ru
Published: March 2013

Since the railway bridge has many spans and long distance, it is complicated and time-consuming to model and analyze the random earthquake response of the structure with the finite element software. The dynamic frequency response equation of longitudinal vibration of simply supported girder bridge is established with the unit impulse as the input excitation, based on the motion equation of the MDF system and he transfer matrix principle. Finally, Taking seven cross-simply supported girder bridge as an example, the frequency response of the vertical displacement and axial force are computed with the Rayleigh damping. The result of the vertical displacement and axial force shows that: the mid-span displacement of spans in the middle of the bridge is slightly larger than that of the side spans while the difference between each value is small, but the mid-span axial force of spans in the ends of the bridge is significantly larger than that of the middle spans. And the corresponding Fourier amplitude spectrums under pulse loads are given. With this method, it is convenient to program and calculate the dynamic frequency response of the simply supported girder bridge by mathematical software, and it is available to provide a reference for the random seismic design of the structure.
Stress and Dynamic Characteristics Analysis of Multilayer Composite Flywheel
Authors: Li Guang Xi , Kong Fan Xin , He Lin , Yang Li
Published: March 2013

Stress and dynamic characteristics analysis of Multilayer composite flywheel to study its natural frequency, stress and displacement distribution was investigated in this paper. Combined with the rotor structure characteristics, a calculation model was established on the basis of anisotropy symmetric theory. The analytic formulas with flywheel rotor at working speed were obtained. Established the finite element model of the rotor. The radial , hoop stress, radial displacement and dynamic characteristics at a random point were analyzed completely．The results indicate that the safety factor and the natural frequency meet the design requirements.
Performance of Multi-Layer Soil Electric Resistivity Model Comparing with Two-Layer Characterizations in Geotechnical Investigations
Authors: Chik Zamri , Islam Dr. S. M. Taohidul
Published: March 2013

This paper shows the performance of multi-layer soil electric resistivity model comparing with two-layer characterizations in geotechnical investigations. In conventional model, there are inter-relationships between soil apparent electrical resistivity (ρ) and several soil physical or chemical properties. These empirical relationships show limitations to obtain specific soil characterizations of different layers with. Multi-layer true resistivity model is the improvement of conventional two-layer earth model including the criteria of four points probe method. Multi-layer soil resistivity profile shows more accuracy to obtain near surface soil characteristics including the types of soil and rocks, and to detect anomalous materials in soil profile. Alternatively, apparent resistivity in two-layer model can be used to obtain deeper profile of soil characteristics. In this multi-layer soil model, the soil resistivity and resistivity ratio corresponding to the depth in soil medium are considered for geotechnical investigations. Two-layer model includes soil apparent resistivity according to probe distances in depth corresponding resistivity profile. This paper is important for including criteria and performance of multi-layer soil resistivity model and conventional two-layer model for geotechnical characterizations.
Solution of Slope of a Frame Based on Simple Support Beam Coming from Method of Changing to Rigidity by Step Combined with Conversion Method
Authors: Yu Xiao Jin
Published: March 2013

The rigidity-step-change method is set up by Mechanics of Materials. Its distinguishing feature is at the steps of solving the deformation problem. It changes a deformation body to a rigid body before the solution of deformation of the body is get which fitting together with another. Then, step by step, it gets answer by Superposition Method. The main content of Conversion Method is at which the elastic axial line of the conversion beam substitutes the beam which being conversed. And the solution of deformation of the conversion beam could be found easily. In solving the elastic statically determinate frame, it uses the rigidity-step-change method and Conversion Method at suitable steps. It has good qualities for finding solution of the slope of the frame with simple support beam. Only primary computation is need. The steps of solution of the frame slope are given by an instance.
Simulation Calculation and Construction Control of Xiaolan Channel Super Large Bridge
Authors: Jiang Jun , Gou Hong Ye , Wang Jun Ming
Published: March 2013

Xiaolan channel super large bridge is a stucture type adopted in the passenger dedicated railway line for the first time, and the longest span bridge of the passenger dedicated railway line, also the longest span bridge of the high-speed railway in the world with a total length of 7686.57m.. At first, the author compiles APDL command flow program by using the unit birth-death technique, establishes simulation calculation model in the construction process. The creep characteristics of concrete are also taken into account. The whole process of beam first-to-arch later stage construction are calculated and studied. Simulation Calculation and construction control research of Xiaolan channel super large bridge shows that construction control method is reasonable, the calculation program which is used in the paper is right, and using three dimensional substantiality finite element method and “element birth and death” to simulate construction process conform to reality. The bridge is safe in the construction of beam first and arch late.
Phase Change Materials Packed Module Using in Floor Heating
Authors: Qiu Lin , Niu Run Ping , Yang Jin
Published: March 2013

Studied the thermal Characteristics of phase change materials (PCMs) packed module using in the floor heating. Through simulating the storage /discharge process of PCM packaging module by software FLUENT, the influcences of PCM in heating floor on heat transfer、inhibiting temperature change、adjusting the floor surface temperature have obtained .Considered meeting the conditions for the use of floor heating and the needed time of storage /discharge energy, maintaining uniformity of surface temperature, maximizing the function of PCM’latent heat and so on, the relationship between the distribution of Phase change rate with the time of storage /discharge、heating conditions and the utilization have been discussed.
Physical Modeling Test on Gas Rotary Lance for Wire-Feeding
Authors: Yan Qing Hua , Xiong Lie Qiang
Published: March 2013

On ca-cored wire feeding in ladle, there are surface feeding stage and inner feeding stage. China is still in the surface feeding stage. The gas rotary lance was developed for the present condition of the wire feeding devices in China. The water simulation test and the pressure water simulation test were carried through. The vortex on the surface of the liquid and the cavity, the recirculation and rotary in the liquid were observed in the water simulation test. The characteristic curves of the lance coupled with the different wires were disclosed. The lance can be used with the guide pipe directly.
Determination of Bacillus Calmette-Guerin Concentration Integrated in Delivery Materials for Intravesical Infusion Therapy of Superficial Bladder Cancer
Authors: Wu Cheng Ge , Sun Kang Ning , Li Ai Min , Sun Xiao Ning
Published: March 2013

Purpose: To assess determination of Bacillus Calmette-Guerin(BCG) concentration integrated in delivery materials for intravesical infusion therapy of superficial bladder cancer. Material and Methods: The standard BCG solution was prepared and divided into two groups. One group was measured by spectrophotometer direct, the other group was determined by using enzyme mark instrument after the solution had cultured. The preliminary experiment study on BCG integrated delivery materials was finished by XTT method. Results: The wavelength of the characteristic peak changes with the variety of the concentration measured by spectrophotometer direct. The concentration of BCG which was embeded in integrated delivery materials for intravesical infusion therapy of superficial bladder cancer was linear with absorbance at 450nm by XTT method in the selected range. Conclusions: It is an incorrect way to measure BCG concentration like determining other solutions by the spectrophotometer immediately and direct. It is the simple, rapid and reliable method by XTT method to study on the performance of the BCG concentration integrated in delivery materials for Intravesical infusion therapy of superficial bladder cancer.
The Research of Laryngeal Reconstruction with Personalized Artificial Larynx Using Tissue Engineering
Authors: Zheng Wen Xiang , Shi Ting Chun , Yue Xiu Yan , An Xiao
Published: March 2013

It brings the pain to the patients whether in spirit or on physiology when laryngeal cartilage is injured. The paper reviewed the previous methods of improving the pronunciation for laryngeal cartilage injury and patients whose larynxes have been cut off, and compared the advantages and disadvantages of various methods. On the basis of the studies on the artificial auricle scaffold, artificial spinal cord scaffold in our center, this paper puts forward a larynx injury repair methods with a personalized tissue engineering artificial larynx, namely taking the advantages of biological manufacturing and tissue engineering related technology to prepare laryngeal cartilage scaffolds, and then the stem cells could be cultured into the scaffold in vitro. After more study and test, this bio-manufactured larynx scaffold could be expected as one of the ideal repair methods for the larynx injury.
Algorithm of Dynamical Pulse Rate Based on Comparison of Slope Summation
Authors: Wang Wei , Gao Cui Yun , Xiong Cai Jun
Published: March 2013

In the process of measuring human pulse rate, the motion of the measured object often make the pulse wave deformed and even distorted, which affect the precision of pulse rate seriously. To solve this problem, this paper proposed a new method for dynamical pulse wave calculation based on the comparison of slope summation. Collect pulse signals using GPTS(General Purposed Test Auto System), and search the peak with appropriate window width and step size . Adopting comparison of slope summation to identify the main peak of pulse, judging effectively and correcting the pulse rate within probability . Simulation and error analysis are proposed for statical and dynamical situation in this paper at last. The experimental results show that this method is generally applicable to dynamical detection , and the precision meets the national metrological verification procedures JJG 760-2003 .
Enhancement Algorithm Combining Pseudocolor Processing and Marker-Based Watershed Transform for Medical Image
Authors: Ning Chun Yu , Liu Shu Fen
Published: March 2013

Medical images play a very important role in clinical medicine. They often have the features of low contrast, narrow gray scale and edge blurring between tissues. Aimed at the disadvantages, the paper presents a new medical image enhancement algorithm combining pseudocolor processing and marker-based watershed transform. The new algorithm and traditional pseudocolor processing in frequency domain are implemented using MATLAB, and their effectivity is evaluated by two parameters, mean and entropy. Results show that the proposed enhancement algorithm can improve the visual effect of different types of medical images, especially for the tissues in the low contrast regions in the image. The output image is more suitable for doctor’s diagnosing. The algorithm has been used in the medical image fusion system we developed, and the performance is very satisfactory.