bluuebunny/crossref_metadata_2025 huggingface dataset:
Financial Management of the Company for Financial Crisis
Authors: Zeng Ting
Published: October 2010

Corporate Finance is a business process the company forecast capital movement, organization, coordination, analysis and control of a decision-making and management activities. If the long-term store the excess corporate cash, will result in capital investment flow can not, can not be profitable. At the same time, enterprises need to expand production but difficult to raise funds. Therefore, SME Banking, the key is enterprise fund safety, liquidity and profitability of organic combination.
E-Commerce Model Based on Grid Computing
Authors: Hao Xu
Published: October 2010

Recently, the emergence of the Internet, particularly the Web, has led to a growth in the use of e-commerce in business-to-business, business-to-consumer, business-to-public administration, consumer-to-public administration, and user-to-user activities, leading to new business opportunities, as well as to a variety of problems. This paper research presents a brief overview of e-commerce technology and utilizes a survey, based on this overview to garner insights from Information Systems professionals at leading e-commerce firms.
Framework Construction of Condition-Based Maintenance System
Authors: Wang Y. , Qiao J.Y. , Ma Li
Published: October 2010

The condition-based maintenance (CBM) is an advanced maintenance program that recommends optimal maintenance policy based on information collected through condition monitoring techniques. At present, CBM was paid attention to widely. The paper theoretically discussed the structure of a complete CBM system based upon the combing and analysis of the current large numbers of literatures of CBM. Firstly, CBM is introduced. Secondly, the three main stages of CBM work process is given. Finally, the basic structural frame of a complete CBM system is designed and constructed according to a series of functions CBM system should implement.
The Dynamic Balancing Performance of the Machinery Based on Virtual Prototyping Technology
Authors: Wang Hui , Pan Ying Jian
Published: October 2010

The machine is subjected to the inertial effect produced by its inherent mass and moment of inertia from working parts besides external load during operation processes. In the traditional methods of machinery dynamical balancing, the influences of the friction, gravity and the external loads (working load) haven’t been considered. In this paper, the external loading has become an important factor in dynamical balancing problems. Based on Virtual Prototyping (VP) technology, we studied the effect of loading to dynamical balancing when taking several kinds of targets as the optimized goal. The conclusion has significance value for practical application and offers some references to dynamic balance of other mechanisms.
Research on Electrohydraulic Servo Proportional Speed Regulation System for Anti-Explosion Hydraulic Hoisters
Authors: Zhao Ji Yun , Ding Hai Gang , Zhao Liang
Published: October 2010

In terms of poor controllability of motor speed, the drum speed of the anti-explosion hydraulic hoister is fed back and controlled in closed loop. An electrohydraulic servoproportional speed regulation systems for anti-explosion hydraulic hoisters is proposed. Two control constructions are formed, the pump controlled motor system with/without position loop (PCMWP, PCMP, resp.) according to whether the displacement of pump is controlled in closed loop or not. Experiments of two control constructions are made under overflow load and weight load. Experimental results indicate that the presented system can simulate the process of anti-explosion hydraulic hoisters, and closed control loop could promote the control performance of hoister. Compared to the PCMP, the PCMWP is characterized by more stability with better speed follow and better robustness. At the same time, the cage instantaneous sliding at start-up and the pressure shock while braking are avoided effectively relying on the cooperation between the driving system and brake system, which ensure the security for hydraulic hoisters; the method of position correction by using travel switches at the end greatly enhances the precision of parking position.
Reliability Modeling and Simulation of Mechanical Equipment Undergoing Maintenance
Authors: Huang Liang Pei , Yue Wen Hui , Gong Zheng Li
Published: October 2010

The mechanical equipment faults result from parts failure in the period of service time, due to reassembly and maintenance, the reliability model for mechanical equipment is broken, so it is necessary to research and estimate the safety reliability of mechanical system. Based on the time-to-failure density function of parts, the mechanical system reliability model is constructed to track the change course of age structure of part population for the mechanical systems that are reassembled and maintained. By means of simulation of the system reliability model, concerned parameters with mechanical systems service life are defined, it is discussed how the time-to-failure density function have influence on the service life for mechanical systems undergoing reassembly and maintenance. It is significant to estimate reliability and failure rate of systems and to establish reasonable maintenance policies.
Contour Features Based Comfort Evaluation Criterion on School Chair Surface
Authors: Jiang Ying , Hong Jun , Wang Wei
Published: October 2010

The purpose of this paper is to establish a criterion for the school chair surface evaluation through analyzing the rules between contour features and the comfort base on experiments. In the paper, 5 basic contour feature parameters, which are buttocks plunging depth, thigh plunging depth, buttocks contour width, buttocks contour deep and thighs contour width, are proposed. Maximum peak stress (Pm) and contact area (S) are adopted as comfort indices. The participants are 50 Chinese high school students (29 boys, 21 girls) who grouped by body size. Through carrying out the experiments of body pressure distribution at different seat contours, all participants require expressing their feeling about sitting, the effect rules of the basic contour feature parameters on seated comfort are obtained. The results shows the different value of buttocks contour deep and thighs contour width leads to varying optimal comfort points corresponding to different somatotype people. According to BP neural network, a prediction model is established. Finally a kind of school chair surface evaluation criterion based on contour is put forward.
Computer-Aided Working Space Design for Driller Control Cab
Authors: Chen Bo , Deng Li
Published: October 2010

The working space affected workers’ security, health, comfort and working efficiency, which was an important research field of the human-machine system. According to the actual working situation of Chinese driller, the computer simulation of working space nearby driller was established. The lower limb joint angle changed in a comfortable range, which determined the area of H point, and then the regulated quantity of the driller’s chair was calculated by the computer. The working space satisfied both the short driller and the tall driller was obtained by the regulated quantity of chair, which would be taken as the restriction to carry on the human-machine interface design of driller console. In this way, the ergonomics factor was considered in the initial stage of design, and the efficiency of design was improved greatly. Finally, the CATIA human body posture analysis module was used to examine this design proposal, which proved that this method was feasible and effective.
A DSP-Based Design for Generating Limited White Noise Wave
Authors: Ma Ming , Shen Run Jie , Fang Bing , Sun Ming Wei , He Wen
Published: October 2010

In this paper, based on the analysis of white noise generation, equably distributed pseudo-random numbers are generated by a method of mixed congruency. In the case that the pseudo-random numbers are taken as the phase spectrum and the amplitude spectrum is equally set, the waveform array of frequency-domain is made up. The array is transformed from frequency-domain to time-domain by the IFFT before stored into the external data memory. Based on the wave generating technology of DDS, the timer interruption of DSP2812 is installed to change the frequency for generating wave .Then the number is taken out from the external memory. The limited white noise is formed by the way of D/A and zero-section maintenance .This generator can be used as signal source in the noise simulation experiment.
Analytical Analysis Method for Number of Spare Parts of Typical Systems
Authors: Xing Jin , Bo Peng , Hai Lu
Published: October 2010

Series system, parallel system, r-out-of-n system and sequence system are typical in the engineering. Under the assumption that the repair time is negligible and the unit life has the identical exponential distribution, the analytical calculating method for failure probability and availability of the repairable typical system is proposed. The analytical calculating method has avoided the redundant Monte-Carlo simulation and computation, and has explicit physical meaning and high computational accuracy which is convenient for engineering application. The paper provides the practical method for determining the number of the spare parts of the typical system in engineering.
Fault Diagnosis Method Based on Supervised Incremental Local Tangent Space Alignment and SVM
Authors: Wang Guang Bin , Zhao Xian Qiong , He Yu Hui
Published: October 2010

To enhance the effect of fault diagnosis, a new fualt diagnosis method based on supervised incremental local tangent space alignment (SILTSA) and support vector machine (SVM) is proposed. The supervised learning approach is embedded into the incremental local tangent space alignment algorithm, to realize fault feature extraction and new data processing for equipment fault signal, and then correctly classify the faults by non-linear support vector machines. The experiment result for roller bearing fault diagnosis shows that SILTSA-SVM method has better diagnosis effect to related methods
Computer Aided Geometric Tolerance Specification in 3D-CAD System
Authors: Li Guo Wei , Zhang Wei Min , Li Peng Zhong , Zhu Yi Zhou
Published: October 2010

Tolerance specification is the activity of specifying tolerances. In current 3D-CAD system, tolerance types and tolerance values are specified by designer manully, and the validity checking of tolerance is no available. To achieve semi-automatic tolerance specification, geometric feature in the next-generation Geometrical Product Specifications and Verification (GPS) was introduced, the corresponding rules between geometric features and tolerance types were presented; The recommended values for tolerance were stored in a database system and constrainted by tolerance principles. Additionally, the implementation of computer aided geometric tolerance specification was proposed. Finally, the initial prototype system was developed to demonstrate the proposed scheme, which aides designer to define reasonable tolerance types and tolerance values in 3D-CAD system.
Study on Nonlinear Energy Pumping of the Vibration System with Cubic Damping Absorber
Authors: Tang Si Mi , Zhu Shi Jian , Lou Jing Jun
Published: October 2010

The nonlinear energy pumping in a two-degree-of-freedom system comprising a damped linear oscillator coupled to cubic damping absorber is studied. It is verified that the nonlinear pumping energy can be performed by cubic damping absorber besides cubic stiffness absorber. The resonance capture is verified by time-frequency analysis (Hilbert Transform). The energy pumping efficiency is put forward for quantitative analysis, and the optimal parameters of system are obtained. The amplitude of main oscillator can be attenuated in a very short duration. The result may be significative for engineering implementation.
Research on Semi-Passive Shunted Piezoelectric Membrane for Sound Isolation with FEM
Authors: Zhang Wen Qun , Wu Xin Yue , Cao Wen
Published: October 2010

When a proper shunt circuit is connected with a curved piezoelectric membrane, its bended stiffness can be intensified. The system can be used for sound isolation. This mechatronic system， a typically multi-physics problem, was analyzed with FEM in detail. Frequency response characteristics were obtained when shunted with negative-capacitance in parallel. Transmission Loss was presented from 100Hz to 1000Hz. A wonderful sound isolation performance is obtained when shunted with proper values of negative capacitance. Negative capacitance and the loss of piezoelectric material are the main factors of the system. At some frequencies, the sound isolation performance can be increased when a compensated resistance paralleled with negative capacitance. This compensation is dependent on the frequencies. Due to its ordinary electrical parameters, the sound isolation system is realizable in practice. This sound isolation technology can be used in some fields such as windows of room and car.
The Analysis of Energy and Environmental Efficiency Based on Input-Output Model
Authors: Deng Wei
Published: October 2010

Input-output method can conveniently analyze energy consumption and environmental load for iron and steel enterprises. It can visually express production manufacturing statement and the consumption of energy and non-energy. Mathematical models are helpful for quantitative analysis and data handling. In addition, it’s useful to analyze main affected factors. Unit process energy consumption and steel ratio directly affect energy efficiency, which can be analyzed by e-p method.
The Design of Electronic Engineering Budget Software Based on Construction Drawing Recognition Technology
Authors: Hu Zhi Min , Tang Jun
Published: October 2010

Electronic engineering budget software provides a powerful tool for the electronic engineering cost analysis, reduces the tedious hand-written budget work of the Engineer. However, to break down the project, and input into project budget software are still time-consuming works. This thesis identifies electronic engineering construction drawings using image recognition technology, automatically calculates the engineer quantities in accordance with the semantic properties of the image pixel, and finally designs electronic engineering budget software based on construction drawing recognition technology. Software application shows that the time of budget book using PRBudget is only 1% of manual preparation, and the average error of calculate is 3.89%, so it can apply to practical engineering.
Improvement of Oxidation Resistance of A NiAl Eutectic Alloy Doping with Dy
Authors: Zhang Guang Ye , Wang Jin Lin , Chen You Ming , Liu Long Fei , Guo Yuan Jun
Published: October 2010

The isothermal oxidation behavior of NiAl-30.9Cr-3Mo-0.1Dy alloy has been investigated in the paper. The results reveal that Dy-addition significantly improves the oxidation resistance, which is attributed to the formation of continuously compact Al2O3 layer and rich-Cr transition layer on the surface of the tested alloy.
General Fractal Dimension Calculation of Vibration Signal Based on Correlation Integral
Authors: Wang Bing Cheng , Ren Zhao Hui
Published: October 2010

Four different fault signals are simulated and collected which are oil whip fault signal, rub-impact fault signal, rub- oil whip coupling fault signal and rub - loose coupling fault signal in the lab. According to the Restructuring the theory of phase space, in foundation of the optimal delay time τ and the embedding dimension d, phase space is restructured to the time sequence of different fault. Simultaneously in connection with the general fractal theory and its algorithm, author has conducted the analysis and study, and the correlation integral is used to the concrete calculation of general fractal dimension, fractal dimensions of four kind of fault are calculated separately by this calculation method. The research goal is attempting to explore one new calculation method of general fractal dimension to improve accuracy and increase the degree of differentiation, to provide the basis for the analysis of the fault signal.
CFD Research on Aerodynamic Performance of Complicated Resistance Muffler
Authors: Wang Li , Zhou Yi Qi , Wang Zhen Hua
Published: October 2010

In this paper, a complicated resistance muffler was designed for a construction machinery. Computational Fluid Dynamics (CFD) method with three dimension models was used to explore the aerodynamic performance of the muffler. With this method the pressure distribution in the muffler is simulated and the pressure loss is predicted for the structure modification. The experiment results verify that the assembly performance of the muffler modified is better than the original muffler. The pressure loss and the insert loss of the improved muffler meet the design specifications and standards of the construction machinary. The integrated performance of the construction machinery has been advanced.
Design and Analysis of Slide Valve Used in Water Hydraulic Servo Valve Based on Flow Field Simulation
Authors: Wang Xin Hua , Zheng Jian , Li Wei , Sun Shu Wen
Published: October 2010

Because of the difference between oil and water in physical and chemical properties, research on the design method of water hydraulic slide valve is important to design the water hydraulic servo valve. Based on the flow fluid simulation of incompressible flow, according to the design parameters of water hydraulic slide valve, CFD software Fluent is used to simulate and analyze the flow characteristics of water hydraulic slide valve. The simulation model of Slide valve with rectangular openings has been built, and different combinations of boundary conditions are specified to make comparisons so as to ensure the correctness of the simulation. The factors which impact the static characteristics of slide valve like the spool opening, flow coefficient, incidence angle have been discussed. The results indicate that the flow designed of the slide valve is approximately proportional to the spool opening by rational selection of structure parameters. The structure parameters of the slide valve that satisfy the design requirements are derived.
Feature Description for Streamlined Structure
Authors: Liu Guo Wei
Published: October 2010

Streamlined structure is a special structure which supporting freeform-surface skin. Taking the case of the head structure of a streamlined high-speed train, the characteristics of the streamlined structure were analyzed. Based on this, feature description for streamlined structure was proposed. With the help of the feature, the solid model of the streamlined structure can be easily generated, modified automatically adapted to the change of the streamlined freeform surface. The feature will be beneficial to the finite element analysis of the streamlined structure, comparison among different design plans, for the optimization design of streamlined structure and advanced software development for generation of streamlined structure with the concept of concurrent engineering.
The Research on Robust LQ Control Applied to Uncertain Vibration Isolation System
Authors: Zeng Qiang Hong , He Qi Wei , Lou Jing Jun
Published: October 2010

Synthesized considering several performance target, robust optimal control was applied to uncertain double layer vibration isolation system then the transfer function was got between input disturbance and out performance. By analyzing the amplitude-frequency characteristics of transfer function, the result show that the robust LQ control can successfully improve the isolation performance of uncertain hybrid vibration isolation system, realize the multi-objective optimization.
Study on the Mechanical Properties of the Hydropneumatic Fender
Authors: Lou Jing Jun , Chen Dao Zhou , Zhu Shi Jian , Wang Xiao Qiang
Published: October 2010

The dynamics and performance of hydropneumatic fender were studied. A theoretical model of the hydropneumatic fender was established to calculate its reaction forces and energy absorption capability. The influences of the length, diameter, volume percentage of water, and the internal air pressure upon the mechanical properties were analyzed. The reaction force and energy absorption capability of the hydropneumatic fender were numerically studied with the finite element analysis software MSC.Dytran. The numerical results were in agreement with the theoretical results, which showed that the theoretical model has well accuracy and is significative for the design of the hydropneumatic fender.
Kinetic Analysis of a Cylindrical Shell Partially Treated with Constrained Layer Damping
Authors: Zhang Xiang , Lou Jing Jun , Ding Shao Chun
Published: October 2010

This paper presents a transfer function method for a cylindrical shell with a partially passive constrained layer damping (PCLD) treatment. A thin shell theory based on Donnell-Mushtari-Vlasov assumption is employed to yield a mathematical model. The equation of motion and boundary conditions of a cylindrical shell with partially PCLD are derived. The paper provides theory supports for PCLD structure’s engineering applications in submarine weapon field.
Collaborative Optimization for the Cold Extrusion Die and Process Parameters of Wheel Hub Bearing Rings
Authors: Meng Bin , Wu Hai Wei , Bao Guan Jun , Yang Qing Hua
Published: October 2010

The traditional optimization method for cold extrusion forming needs to perform finite element analysis repeatedly and therefore has to consume significant computational resource. This paper describes a collaborative optimization method for the cold extrusion die and process parameters of wheel hub bearing rings, combined using finite element analysis, orthogonal experiment, neural network and genetic algorithm. Orthogonal experiment is used to design experimental schemes. Neural network is used to establish mapping relationship between die and process parameters and maximum extrusion force. Genetic algorithm is used to optimize cold extrusion die and process parameters. Via this approach the finite element analysis is relatively independent of optimization process, which just provides training samples of neural network and evaluates the optimized results obtained by genetic algorithm. It overcomes the deficiency of large computational resource consumption of traditional optimization method and provides a fast and effective approach for die and process optimization of cold extrusion forming.
Design and Development of Vehicular Monitoring System for Passenger Car Based on Protocol SAE J1939
Authors: Zhang Guo Hui , Sun Jian Fang
Published: October 2010

In this paper the system architecture of the vehicular monitoring system based on high speed CAN bus and low speed CAN Bus and SAE J1939 so as to share information between different ECUs (Electronic Control Units) has been designed. Using Visual C++ 6.0, vehicular monitoring software platform has been developed to realize vehicular runtime parameters monitoring, device controllers monitoring and malfunction monitoring. Also a case study has been given, and the results of the system application are reasonable.
A Novel Literature Retrieval Model of Digital Library Based on Wiki Technology
Authors: Zhao Gui Fen
Published: October 2010

Wiki technology is one of the hottest research domains nowadays. The idea of integrating Wiki with digital library brings us new way to improve the quality of information retrieval and service in digital library. This paper presents a new retrieval model based on Wiki technology in literature retrieval system. Experiments designed show that the recall and precision of the new system are much better than the traditional ones. But the method also has some disadvantages, for example it does not change computer's communication mode essentially. Our work will deal with these problems mentioned above to provide better service in the digital library in the future.
Design and Implementation of Two Axis Tool Table Control
Authors: Kang Li , Yang Lei , Yang Jie , Li Yi
Published: October 2010

This paper presents the software implementation of a feedback control for the two axes of an XY table and the simulations of motor X and motor y velocity responses to the specific step inputs. The object of the software is to guide the “tool point” around the outside edge of a planar “workpiece” under computer control. PWM method and P control philosophy are used in the control. By means of least-squares estimation, the values of coefficients in the discrete modes for the controlled motors are determined. The results show that the control strategy is practical and the simulations are valid.
Research on Control Power and Self-Sensing Technology for GMM Self-Sensing Actuator
Authors: Wang Xin Hua , Hu Shou Qiang , Ya Qian Yi , Sun Shu Wen , Cao Xiu Xia
Published: October 2010

Structure and principle of a new kind of diphase opposition giant magnetostrictive self-sensing actuator (SSA for short) is introduced, for which a kind of double outputs high-precision NC stable voltage power is designed. With the method of combining with the hardware design and the software setting, the controllability and reliability of the actuator are greatly improved. And the whole design becomes more reasonable, which saves the cost and improves the practicability. In addition, based on the micro controller unit (MCU) with high-speed control, the scheme design of the real-time separation circuit for dynamic balance signal can effectively identify out and pick up the self-sensing signal which changes from foreign pressure feed back. Then the SSA real-time, dynamic and accurately control is realized. The experiment results show that the voltage power can high-speed and accurately output both output voltages with high current, and that the self-sensing signal decoupling circuit can isolate the self-sensing signals without distortion
5-Gram Unified Event Model
Authors: Zou Xin Yao
Published: October 2010

In this paper, a 5-gram unified event model (UEM5) is presented, which facilitates user session identification and provides better quality data for mining algorithms. Experimental results show that UEM5 is a high quality data source and has favorable online logging and offline mining performance. It can be well applied in E-commerce applications, including Web personalization, recommendation and business intelligence.
The Measurement of Dynamic Stress for The Top-Cutter Machine of Cotton
Authors: Xu Chun Mei , Wang Chun Yao , Chen Fa , Lei Min , Jiang Yong Xin , Teng Hua Deng
Published: October 2010

In this paper, we used the dynamic strain measurement method to measure the top-cutter machine of cotton’s stress under its working state. With sorting out data and analyzing it, we obtained the stress condition of the framing and the working parts. And the measurement result could be used to analyze the axle’s fatigue strength and check whether it was safe or not. It provided integrant basis for the further design of the machine.
Parameters Varation of Electronic Components in Fuze under High Stress Fields
Authors: Li Bo , Zhang Hong Xiang , Zhang Ya
Published: October 2010

Dynamic testing experiments and test scheme are carried out to testing the parameter varation of typical carbon film resistors and ceramic capacitors of Fuze under high stress fields—high temperature and high mechanical stress overloading, and the changing law of the components parameter are got in high stress fields, then parameter of components instant instable motion under high mechanical stress overloading is discussed by analyzing experimental results, and found out parameters approximate linear in small range in 25°C～125°C, of nonlinear in large range in the very high temperature of 125°C～350°C conditions, which can offer some reference value to prolong lifetime of military electron device.
Auricle Bracket Rapid Prototyping Optimization and Process Control
Authors: Cheng Xiao Min , Shen Jian Yu , Liu Cao
Published: October 2010

Several key problems in the process of auricle bracket prototyping have been discussed, new research ideas and detailed solutions have been brought forward. Points’ data is acquired through setting rational scan processing parameters and overlapping the data of multiple scans, after analyzing the optimal object functions and strategy, genetic algorithm is used to optimize the prototyping direction, and further separate layers, arrange parts layout and manufacture the prototype. The method can collect more integrated auricle points’ data and optimize in real time. The result shows a perfect optimization has been achieved, after further planning, a satisfactory auricle bracket can be manufactured.
Relations of Low-Carbon Steel Surface Layer Hardness of Hard Facing and Welding Techniques
Authors: Ni Zheng Guan
Published: October 2010

through super-hard wear-resistant surface electrode surfacing D707 in Low-carbon steel. We have analysis the effect of welding process parameters and post-weld heat treatment process on low carbon steel surface hardness of cladding layer. The experimental results show that: after quenching hardness value no significant change; But after annealing the hardness value decreased and after annealing the crystal grain of the underlying tissues uniformization become tiny. micro-hardness testing is carried out in the weld cross-section, we have find out that from the base metal to the cladding layer the surface hardness values is getting higher and higher, while the indentation is getting smaller and smaller. Because hardness is a measure of wear resistance materials, thus it can indirectly show that when low-carbon steel surface electrode in the super-hard wear-resistant surfacing welding layer, it can improve the surface hardness of low carbon steel and improve wear resistance of low carbon steel surface.
QoS Parameters of Grid Services and Service Matchmaking
Authors: Chen Fu Gui
Published: October 2010

The standard sample space and the nonstandard sample space which is separately composed by standard sample and the nonstandard sample are called general sample space. QoS parameters of grid services and service matchmaking are discussed.
On the basis of the ability of service providers, by Algorithm Prim, this method succeeds in calculating a set of balanced expectation values of QoS. its application on the development of intelligent controller was discussed.
The Design of College Network System
Authors: Zhu Zhi Yong , Bai Lin Feng
Published: October 2010

The concept of participating management in social management was consulted; we have proposed a new concept of user-participating the network management. The core of this concept is people network and people management. The new network management philosophy will fulfill to convert the unified management of traditional network from co-management; forming one type of everyone can use networks and everyone participate in the network management.
Key Problem in Support Vector Machine Model
Authors: Qu Xi Long , Dai Mi An , Li Zhen Hui
Published: October 2010

This study found the development direction of SVM, the research content is the most crucial and fundamental nature in SVM, if achieve this paper targets, it will promote the further application of SVM, and have important theoretical value; In addition, this study are The basic work of nuclear analytical methods, the results can be directly applied to the field of recognition pattern based on nuclear analytical methods (such as Kernel Principal Component Analysis and Kernel Fisher method), so the research results of this paper has good generalized values.
The Realization of Design of Agile Commerce Based on Web Service
Authors: Qu Xi Long , Dai Mi An , Li Zhen Hui
Published: October 2010

The definition of agile commerce is introduced, and the earlier emergence of e-commerce technology, such as EDI, web EDI, contents server, application Server, EAI(Enterprise Application Integration) are presented. The advantages of web service are discussed; moreover, based on the web service, the system of agile commerce based on web service is design. Finally, the running interface and core code are shown.
Research and Implementation of Fast Image Fractal Coding Algorithm
Authors: Qu Xi Long , Dai Mi An , Li Zhen Hui
Published: October 2010

Image is one of the most important carriers for communication in our life, and it’s the utmost medium containing information. As all we known, the data quantity of digital image is so large that it should be compressed for high-speed transmission and store. So image encoding has become one of the key technologies on which the digital society depends.
Technology of High-Speed Milling Process and Programming Optimization for Beverage Bottle Hollow Mold
Authors: Deng Yi , Xia Bin Bin
Published: October 2010

From the perspective of optimization of high-speed milling process, this paper has described the programming strategies of the mold high speed machining, including appropriate method of selection of high-speed machining, tool cut-in, cut-out and the control of the way of tool shifting. Taking mold cavity as the bottles as processing objects, it has discussed the quality and efficiency of processing of the mold angle which encountered frequently in processing. And it has developed the strategies of processing and set the parameters, then completed the programming of high-speed processing.
Mechanism of Early Cracking and Serviceability of Precast Reinforced Concrete Bridge Deck Slabs
Authors: Huang Juan , Tang Li Qun
Published: October 2010

In the light of the mechanism of early cracking in a batch of precast reinforced concrete hollow slabs of four certain bridges in construction whose midspan appears transverse cracks, investigation ranging from method of construction to distribution of cracks are conducted in situ. The possibility of the occurrence of cracks is discussed in detail. Theoretical calculation as well as numerical analysis reveals that the main reason of formation early cracking in slabs is self-weight loading. In order to assess the performance of the bridge deck system which appears cracks and evaluate the effect of early cracking on structural behavior, numerical analysis is performed to conclude that the bridge deck is satisfied with the serviceability requirements. In view of the fact that this kind of slab is widely used in bridge projects for convenience in construction and advantage in cost, effective and economical crack control measurement and technical proposal are recommended with regard to the design, construction and amendment of design specifications.
Design and Implementation of Device Cooperation Middleware for Earthquake Precursor
Authors: Deng Pan , Zhang Jian Wei , Liu Hong Yu , Jia Min
Published: October 2010

In the Earthquake Precursory Forecast industry, despite the ample amount of instruments and data resources owned by the research institutes and organizations, difficulties such as instrument access, lack of diversity in process means of collected data, collection of data across layers still exist due to difference of equipment type and the degree of information among different institutes. On the base of research and analysis about the device resource characters and collaborative application in Earthquake Precursory Forecast, we design and realize the middleware of device collaboration. The practice operation shows that the middleware can meet the demands of device resource’s reliability, efficiency and collaboration in Earthquake Precursory Forecast industry.
Modal Aanalysis of the Composite Material Blade
Authors: Li Jian Hua , Fu Cai Ming , Mao Wen Gui
Published: October 2010

Dynamic stress of wind turbine blade has great influence on its reliability and fatigue life. In order to decrease the magnitude of dynamic stress, frequency modulation method is often used to avoid resonance. This paper created composite material model for a wind turbine blade. Blade model was imported to abaqus environment for modal analysis. In view of the characteristics of fiber reinforces plastic, a mesh was built to carry out the model analysis, and the first 6 orders of the vibration frequencies and mode shapes were obtained, by imposing certain bound on the root of blade. Meanwhile, The analysis results of the composite material blade considering stiffening effect were obtained. This method can shorten modeling time and improve working efficiency, and also it is the base for blade structure calculation and check and new product developing.
Structure Analysis and Optimization of the Rotor of a Vertical Motor Based on Virtual Prototyping
Authors: Fu Cai Ming , Mao Wen Gui , Li Jian Hua
Published: October 2010

The solid model and virtual prototype model are built. Kinematics, strength and rigidity analysis are completed with FEM simulation system of MSC.NASTRAN. The analysis results of stress, strain and displacement of finite element simulation are presented. The results of simulation were proved by vibration experiment. Based on the simulation and vibration experiment, the mechanics dynamical properties are proved, the main destroy form and locations are analyzed and indexed. The result shows that the rigidity and strengthen could meet the requirement of design of the motor. In the end, in order to satisfy the needs of kinds of clients, the effect of core length on the stress and displacement is also discussed through FEA simulation. Finally, an optimization structure of the Rotor of a vertical motor is given and analyzed, which has the guiding sense in the test and 0ptimizating for the rotor.
The Granule Mechanic Model for Numerical Simulation of Coal Stream in Coal-Fired Power Plant
Authors: Peng Hui Chun , He Qing
Published: October 2010

In this paper, the contact models of particle system of coal stream are analyzed; the granule mechanic models of coal stream in different imposed conditions are summarized. Using 3d-discrete element method, a particle mechanic model of clumps is constructed by the contact bonding model to simulate the cataclasm phenomena during the coal conveying of Coal-fired power plant, which plays an important role in assuring the fidelity and integrality of 3D virtual coal conveying scene.
Fretting Fatigue Behavior of Riveted Al 6XXX Components
Authors: Luo Ji Xiang , Tang Chun
Published: October 2010

The riveting is widely used for fitting together two or more elements of structure in the same or different materials. In these assemblies the stress field is complex, we have to consider the effect of the geometrical discontinuity, the contact, the tightening, the material properties and the applied load. The current work focus on the study of fretting fatigue crack formation in common 6XXX aluminum alloys, used in land transportation equipments, and uncovering characteristic origins of crack by experimental and numerical methods based on multi-axial fatigue life models. 3D finite element models were validated by the experimental results obtained with strain gauges. The influences of the contact friction coefficient at the fretting surface, the fastening forces and the remote stress applied in the fretting fatigue experiments on the crack origins are discussed by the comparison of the different numerical results.
Design and Manufacture of Three Dimensional Integrated Braided Composite Tube with Flange
Authors: Chen Guang Wei , Li Jia Lu
Published: October 2010

In this paper, the design and manufacture technology of three dimensional(3D) integrated braided composite tube with flange are researched, including: braiding technology of 3D braided preform of tube with flange, the determination of process parameters of resin transfer molding(RTM) for 3D braided composite tube with flange, and the design of mould for consolidation of composite tube with flange. The fiber volume fraction of this component is calculated. The quality of composite tube with flange is good analyzed by ultrasonic A-scan. The maximum compressive force borne by composite tube flange is 56.65 kN, which has met the need of usage of 38 kN. The research result will provide a good way for designing and manufacturing high performance 3D integrated braided composite components with irregular shape.
Effects of Heating Period of Time on Tensile Property of Plain Woven Fabric/Epoxy Resin Laminated Composites at High Temperature
Authors: Chen Guang Wei , He Gui Fang , Li Jia Lu
Published: October 2010

The purpose of this paper is to investigate the tensile property of laminated epoxy resin composites reinforced by carbon fiber plain woven fabric with different heating period of time at relatively high temperature. For this purpose, the tensile tests of laminated resin composites are carried out at 150°C and 180°C with 15 minutes, 10 hours and 30 hours heating period of time, respectively. The reasons for the variations of tensile property of these composites with different heating period of time at 150°C and 180°C are analyzed. At 150°C and 180 °C，with heating period of time increasing the tensile strength of samples keep the same level. However at 180 °C the average tensile strength of samples is decreased by 14.95% compared with that at 150°C and the variation coefficient (CV) of tensile strengths at 180°C is much more than that at 150°C. These show that the tensile strength of resin laminated composites is sensitive at high temperature, although the tensile strength of resin laminated composites keeps the same level at same temperature with different heating period of time. The reason of the tensile strength of resin laminated composites decreased at high temperature is that resin has been damaged，which losing the adhesion of fiber and resin, so that these make resin and fiber can not bear the tensile load together. The research results will provide a basic reference for the application of plain woven fabric reinforced laminated resin composites with long using period of time at high temperature.
Numerical Method for Earthquake-Induced Pounding between Girder and Shear Key. I: Theory
Authors: He Wei
Published: October 2010

Earthquake ground motion can induce out-of-phase vibrations between girders and shear keys, which can result in impact or pounding. The paper investigated pounding between girder and shear key from an analytical perspective. By introducing the initial gap in the analysis model, the elastomer stiffness played a role in the transverse vibration as well. A simplified model of bridge transverse seismic response considering girder-shear key pounding was developed. The equations of motion of the bridge response to transverse ground excitation were assembled and solved using the central difference method. Pounding was simulated using a contact force-based model—Kelvin model. Thus, the girder-shear key pounding effects and bridge transverse seismic response can be obtained by using a step-by-step direct integration the central difference method with the appropriate parameters. The proposed method is very useful in the seismic design of bridge.
Fracture Test and Analysis of Notched Bars Fabricated from Q235 Steel at Room Temperature
Authors: Wang Wan Zhen , Liu Wu Feng , Wang Xin Tang
Published: October 2010

Tensile tests at room temperature were performed on 20 notched bars fabricated from constructional steel Q235 specified in Chinese National Standards. The effect of the notch radius, r, and that of the notch depth ratio, d/D, on the fracture model of the constructional steel is examined. The experimental results demonstrate that cracks initiate at the notched section. Specimens with a sharper notch radius (a smaller r) and a larger notch depth (a smaller d/D ratio) show poor ductility, but high fracture strength. The experimental data are further analyzed using an elliptical yield model together with an elliptical fracture model originally proposed by the first author. The stress field computed from the numerical procedure indicates that the crack initiation occurs at the center of the notched section which experiences the highest stress triaxiality ratio (óm/óseq). As the stresses at the notched section reach the limiting values determined from the elliptical fracture model, macroscopic fracture failure in the notched bar occurs.
Research of Finite Element Simulation for Diesel Intake Port
Authors: Zhang Liang Feng , Chen Duo , Liu Ming Wei
Published: October 2010

In this paper, we study how the geometry of helical intake port of diesel engine influent air flowing conditions to reduce the complexity and difficulty of getting air flowing conditions by experiments. In numerical modeling, we import model of intake port into ANSYS software and do mesh processing on intake port in sections. We then analyze air flow based on working conditions, including difference of pressure between intake and exhaust port and lift-range. We deal with data by post-processing module in ANSYS and obtain velocity distribution and turbulence energy distribution of intake and exhaust port. Finally, we can predict the performance of intake port and find optimizations theoretically.
Optical Transmittance and Band Gap of Electrodeposited Cu2O/ITO Layers
Authors: Hu Fei , He Zhi Yu , Li Xiao Hong , Hu Yue Hui
Published: October 2010

Cuprous oxide films are successfully electrodeposited through the reduction of cupric ions in alkaline and acid electrolytes. The effect of electrodeposition parameters on the optical band gaps of Cu2O films is investigated using UV-vis spectroscopy. It is found that the optical transmittances and the band gaps of the Cu2O thin films are strongly influenced by the electrodeposition bath, the temperature, the current density, and the pH value. The band gaps are varied from 1.80 eV to 2.43 eV with different electrodeposition parameters.
A Fair Algorithm of Congestion Control to Improve HSTCP
Authors: Guo Dong En , Jin Bing , Shen Yan
Published: October 2010

Standard TCP has lots of problems; for example, the network bandwidth can not give its full play in certain application conditions such as high speed or long distance. High Speed TCP (HSTCP) can solve these problems, but it has serious problems in the fairness of different RTT. Based on the analysis of HSTCP fairness, an algorithm of adding fair factors to improve fairness of HSTCP has been put forward after fairness simulation test by NS2. NS2 simulation experiments prove that this algorithm has greatly reduced the unfairness because of the different RTT.
A Spatial 3-DOF Translational Compliant Parallel Manipulator
Authors: Zhu Da Chang , Feng Yan Ping
Published: October 2010

A new approach of structure synthesis of 3-DoF compliant parallel manipulators with flexure hinge is proposed in this paper. Based on characteristics of flexure hinge and topology optimal method, the kinematics of the 3-DOF perpendicular compliant parallel manipulator with flexure hinge and its control system are developed. The parallel manipulator is driven by three piezoelectric actuators and the three actuators in this mechanism are arranged according to the Cartesian coordinate system. Experiments are conducted to give some validation of the theoretical analysis.
Study on Fretting Wear Behavior of Medium Carbon Steel Used in Steel Worm Gear Pair
Authors: Li Zhu Jun , Zhang Da Tong , Shao Ming
Published: October 2010

Fretting wear behavior of 40CrNiMoA steel was studied on a SRVⅣoscillating friction and wear tester. The results indicate that the fretting wear volume increase with test frequency, load and amplitude increasing. Meanwhile, the fretting wear mechanism is directly related to test frequency, load and amplitude. When they are small, the main fretting wear mechanism is abrasive wear, with these test parameters increasing, the main fretting wear mechanism turns to a combination of abrasive wear and adhesion wear. Based on the experimental results, the anti-fretting wear measures of steel worm gear pairs used in mechanical tracked regulator of tracked vehicle are discussed.