bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimization of the Rollers System of Aluminum Strip Rolling Mill Based on the Stochastic Vibration
Authors: Xu Bao Yu , Liu Yi Lun , Wang Xu Dong , Dong Fang , Kang Zhi Cheng
Published: October 2010

The dynamic behavior of roller system of a "1+4" hot strip rolling tandem mill were analyzed. The stochastic vertical vibration and the optimum mathematical model were established based on the reliability after the system simplified to some extent. Stochastic optimum has been done to the system according to the optimum mathematical model of the roller system. Its best natural frequency and damping coefficient are obtained by computer simulation under the situation of minimum response of the rollers stationary acceleration when chatter occurs. The results indicate that by optimizing the natural frequency and damping coefficient of the system can greatly improve the dynamic behavior of rollers system and equality of the strip, and are useful to the new design of the rolling mill and the setting up of the rolling parameters.
Proposal of Power Determination and Measurement of Compressible Air
Authors: Liu Chong , Cai Mao Lin
Published: October 2010

This paper proposes a representation and measurement method for compressed air power widely used by various industries in the industrial. It proposes an accurate and standardized way to represent and measure the power energy in unit time of the flow compressed air, then establishes the evaluation system in energy distribution, loss and use in pneumatic system, which can clear the energy loss in pneumatic system and its components. Pneumatic power transducer designed in accordance with pneumatic power, it has advanced functions and higher precision, which can promote the energy efficiency greatly in pneumatic system.
The Comparison of Isotropic and Anisotropic Diffusion Techniques for Image Denoising
Authors: Liu Cui Yin , Zhang Chun Yu , Yuan Hong Zhao , Qu Xi Long
Published: October 2010

The non-linear diffusion techniques were proposed for overcome the linear diffusion defaults. The linear diffusion was a homogeneous diffusivity with a constant conductivity. In this diffusion process, the noise and the edges were smoothed in the image. In order to prevent the edge from being smoothed during the denoising, the nonlinear diffusion was proposed by Pereona and Malik. In this method, noise was smoothed Simultaneously with the edges blurred. In diffusion processes, the conductivity is dependent on the image local information. We analyzed the ineffectiveness of isotropic and extended the work into the tensor-based anisotropic diffusion. It would be desirable to rotate the flux towards the orientation of interesting features. We compare the difference of isotroic linear and non-linear anisotropic diffusivity, and considere how to design non-linear anisotropic conductivity based on the different requires of the image filtering.
Design and Optimization of High-Viscosity and High-Density Drilling Fluid Separation System
Authors: Xu Ren Bo , Liu Xiao Guang , Tu Fu Quan
Published: October 2010

For degassion of high-viscosity and high-density drilling fluid used in ultra-high pressure oil and gas zones, a two-stage vertical separation system was established. In this system, gravity separator was used as the first separator and the second separator was centrifugal separator. Using orthogonal experiment method, we simulated flow field in this system by CFD software and analyzed the effect of operate variable and structural variable on system degassion efficiency. In accordance with the characteristics of flow fields, the performance optimization scheme was presented.
Transient Thermal Analysis of Spiral Bevel Gears under Loss of Lubrication
Authors: Yan Yu Tao , Sun Zhi Li , Guo R.J.
Published: October 2010

Based on loaded tooth contact analysis of spiral bevel gears, the thermal analysis model and finite element model of spiral bevel gears were established by making use of tribological theory and thermal transferring theory. The distribution on transient temperature field of spiral bevel gears under loss of lubrication was found via finite element methods. The results are as follows: the sliding speed and normal load had obvious influence on friction heat. Transient temperature peak value of the gear tooth was obtained in midpoint position of the tooth contact path. The temperature gradient increases with the increase of meshing times of gear tooth, the transient temperature of the gear tooth surface had increased 32°C in one minute. However, the transient temperature of the tooth surface had increased 232°C in three minutes.
The Optimum Design for the New-Typed Auto-Eliminate Backlash Mechanism in Gear Transmission
Authors: Liu Qin Qin , Xiang Zhong Fan , Wang Jin Ge , Wu Jiang
Published: October 2010

In order to solve the transmission error from the backlash in precision gear transmission, this paper proposes a mechanism which uses slider and pendulum to eliminate backlash. Based on the force analysis of the new-typed auto-eliminate backlash mechanism, genetic algorithm is selected to optimize the design. The simulation experiment by Matlab shows that spring force of the mechanism is minimum and its performance is ideal, meanwhile the configuration parameters of the mechanism are ensured.
A Trajectory Privacy Preserving Method in Peer-to-Peer LBS System
Authors: Guo Yan Hua , Guo Yi Min , Guo Ya Jun , Wang Cai Mei
Published: October 2010

The wide application of Location-Based Service (LBS) makes location privacy and trajectory privacy receive much attention in recent years. The basic idea of current privacy preserving methods in LBS is cutting the relationship of user’s consecutive locations. This paper propose LOCMIX, a trajectory privacy protecting method which is based on neighbor node’s forwarding query in a P2P LBS system. Choose the user who have sufficient power to forward queries to LBS as the forwarding node of user u. The forwarding node must be as close to user u as possible. Then the k-Anonymity Spatial Region (k-ASR) was constructed with the forwarding node and the k-1 users whose Hilbert value is less than (or more than) the forwarding node. The experiments show that LOCMIX has good load balancing property and protect trajectory privacy effectively against the “center-of-k-ASR” attack and the correlation attack.
Boiling in Microchannels with Refrigerant Mixtures
Authors: Hu Zi Cheng , Ma Hu Gen , Song Xin Nan , Wang Qian
Published: October 2010

Experiments were conducted to investigate the saturated flow boiling heat transfer characteristics in single micro tube using environmentally acceptable refrigerant mixtures R32 and R134a. Local heat transfer coefficient was measured and boiling heat transfer mechanisms were discussed for a range of heat flux (3-65 kW/m2) , mass flux (860-4816 kg/m2•s) and quality (0-0.9). These characteristics indicated that the local heat transfer coefficient was greatly dependent of heat flux and independent of mass flux and quality in the nucleate boiling regime, which was oppsite to that in forced convection regime, and deterioration of boiling heat transfer occurred in the local dry-out regime. In addition, a correlation for nucleate dominant boiling in micro tube was developed ,which included the effects of heat flux and fluid property and showed some success with the data of this study within a 20% random error band.
Static and Dynamic Characteristic Analysis of XDK650X Engraving and Milling Machine
Authors: Chen Shi Guang , Zhao Hong Lin , Wu Zhi Heng , Zhang Guang Peng , Wang Bo , Wang Qing Fu
Published: October 2010

To get an accurate prediction and analysis results of static and dynamic characteristics of the whole machine tool, finite element model should consider adding characteristic parameters to each pair of the combined interfaces when being built. Taking XDK650X engraving and milling machine as an example, integrating the combined interface parameters into the whole machine tool model with the help of finite element method, the dynamic model contained combined interface characteristics of the whole machine tool was built, and investigation on static and dynamic characteristic were carried out. Then, the relative stiffness between the tool and the platform was analyzed by using harmonic respond analyzing method. It was concluded that XDK650X engraving and milling machine has bigger static stiffness in three directions compared with other similar machines, but has comparatively smaller static stiffness in X direction, a bigger relative vibration amount between the tool and the platform in Y direction. Therefore preponderant natural frequency should be avoided in usage, the static stiffness in X direction and the dynamic stiffness in Y direction need for enhancement in structural optimization.
Research on the Degradation of VOCs under Visible Light Irradiation Via Nano-Coating
Authors: He Jian Yun , Wang Ke Jian
Published: October 2010

Nano-coatings were prepared by sol-gel process using titanium butoxide and cerium salt as precurors. The substrates were coated by dip-draw method. The structure of nano-coating was characterized by X-ray diffraction (XRD). The degradation activities of nano-coatings were evaluated by testing their efficiency in removing acetone and decane. Results show that the conversion rate of decane and acetone by TiO2 nano coating doped 1.0 wt % Ce was much higher than that of common unmodified TiO2 nano coating.
Computer Simulation on Intensity Distribution of UV Irradiation System
Authors: He Jian Yun , He Zhao Pen
Published: October 2010

The intensity distribution of a UV linear light source and a UV linear light with a parabolic cylinder reflector on work piece surface were simulated using OpenGL program based on VC++6.0. Physical models were established and relevant fundamental assumptions were given. The results of the simulation fitted the real situation quite well. It is feasible to adjust the parameters of UV-curing radiation system using the results of computer simulation.
Virtual Fatigue Test of Auto Parts Based on Non-Structural Road Driving Simulation
Authors: Cong Nan , Chen Xun , Shang Jian Zhong , Liang Ke Shan
Published: October 2010

Non-Structural road driving test is a key part of fatigue and durability tests for vehicles such as the construction machines and ATVs. Combining a theoretic road-tyre dynamic model with some real vehicle design parameters, the responses of the wheel axle under different non-structural road conditions were estimated conveniently. The responses can be taken as inputs for a virtual test-rig simulation, and the responses of every part on the test object are obtained separately. Fatigue life is predicted under the finite element circumstance, and the reliability and durability are concluded. Comparing with the real road-driving test, the virtual fatigue test method above can significantly reduce the test period. This method is used to predict the fatigue life of the rear axle-housing in construction machines, the accuracy of the method is verified by a corresponding real bench test.
Research on Optimization of Air Blowing System
Authors: Xu Wei Qing , Cai Mao Lin
Published: October 2010

Many studies have been made for years on dimensions of pneumatic nozzle. To output same blowing force, the supply pressure could be reduced by decreasing the ratio of length to diameter of nozzle. The friction between high speed air and pipe wall would be reduced if the nozzle is designed to be converging shape comparing with straight shape. But the volume flow and pressure, discussed in these studies, do not describe energy loss of the blowing system directly. Pneumatic power is an innovative principle to estimate pneumatic system’s energy consumption directly. Based on the principle, the supply pressure of air blowing system is a critical parameter concerning energy consumption and blowing force. In the experiment, the air blowing system is supplied by a compressor and an air blower respectively. The pressure of air from the compressor is times higher than air blower. A comparison is preformed to the two systems about energy consumption and blowing force. From the result, the air blowing system with air blower consumes less energy than with compressor. This study provides theoretical basis for designing energy-saving air blowing system.
Based on Continual Development of Remanufacture for Heavy Duty Caterpillar Engines and its Remanufacturing Technology
Authors: Cai Zhi Hai , Zhang Ping , Liang Zhi Jie
Published: October 2010

In this paper, the present situation of maintenance for heavy duty caterpillar engines was introduced. Based on the maintenance shortcoming of heavy duty caterpillar engines, the remanufacturing technology of armored equipment engines was put forward and discussed preliminary. And the difference between remanufacturing and maintenance for equipment diesel engines are summarized. Then new and novel remanufacturing technology was studied and applied on the engine key parts to prolong its service life. After the application of remanufacturing technology, many worn and waste parts can be reused which can save a lot of resource for our nation. It meet the needs of development tactic requirement for saving resource and decrease contamination emissions.
Mechanical and Tribological Properties of Multi-Element CrTiAlN Coatings for Dry Cutting Deposited by Magnetron Sputtering Technologies
Authors: Cai Zhi Hai , Zhang Ping , He Jia Wu
Published: October 2010

Multi-element CrTiAlN coatings are deposited onto YT14 cemented carbide milling cutter by magnetron sputtering in an Ar+N2 mixture. The nano-indenter, scanning electron microscopy, X-ray diffraction and Rockwell indentations were used to investigate the mechanical property, microstructure and adhesion strength of CrTiAlN coatings. And the tribological properties and dry cutting performance of the CrTiAlN coatings were compared with TiN and TiAlN coatings. The experimental results showed that the phase structures of the composite films include Cr, CrN, Cr2N and TiN phases. And the surface crystal grain of CrTiAlN coatings is relative small and the section structure of CrTiAlN coatings was columns crystal structure. It showed better for CrTiAlN coatings on nano-hardness and adhesion compared with TiN and TiAlN coatings. And the friction coefficient of above three kind coatings was about 0.12-0.15. The friction coefficient and wear volume of CrTiAlN coatings appeared lowest among these three kind coatings. Dry cutting experimental results showed that the sequence of cutting life for these coated tools were CrTiAlN＞TiAlN＞TiN.
Tool Overhang Effect on Cutting Force in High Speed Milling
Authors: Zhao Zhen Yu , Du Ying Bin , Zhang Lei Ming , Liu Bai
Published: October 2010

Based on the amount of tool overhang under different high speed machining experiment, the overhang length on the high speed impact of cutting force in milling process is studies. On the basis, the proposed tool overhang and optimum program are proposed in high speed milling, through the rational use of tools to improve processing capacity of the tool.
Analysis of Structure Capital Impact on Knowledge Flow within Supply Chain
Authors: Lu Fei Bao , Zhang Wu Yi
Published: October 2010

Knowledge flow reflects the knowledge level cooperation in supply chain. As asset of an organization, structure capital is one of the most important factors that influence and represent the competitiveness of the supply chain. The relationship between structure capital and knowledge flow is analyzed. The analysis based on structural modeling on key factors that affect the flow of knowledge shows that organizational structure and knowledge gap, as the basic factors, could affect the efficiency of knowledge flow.
Design and Implementation of Data Interchange Platform for Earthquake Precursors
Authors: Deng Pan , Zhang Jian Wei , Gong Qi
Published: October 2010

Design and implementation of data interchange platform is an important issue in earthquake precursory industry, which adapts to extensive observatory networks and diverse observatory programs. However, it is a difficult problem since the data managed are likely to inefficient. Finding proper solutions to the aggregation, storage, and distribution of collected data is emergent. In this paper, we designed an efficient data interchange platform, which based on current grid technology, and the distributed database copying, for switching data over multilevel. Offered the appropriate equipment simulator, experimental results show that data interchange platform is more efficient in the earthquake precursory environment.
Modeling and Analysis of Process Parameters on State Variables in WEDM of TiB2 Nanocomposite Ceramic
Authors: Reza M. , Yazdi Soleymani , Dehghan Hoseyn , Amini Hoda
Published: October 2010

The main objective of the present research is to find the influence of process parameters on the state variables (i.e., surface roughness and material removal rate) in Wire Electrical Discharge Machining (WEDM) of Titanium Diboride (TiB2) nanocomposite ceramics.
This work adopted an L32 orthogonal array based on Taguchi method for design of experiments. Statistically evaluating the obtained data is carried out by using the analysis of variance, signal to noise and artificial neural network techniques. Then, the effects of process parameters on the surface roughness and material removal rate are studied.
Finally, the Multilayer Perceptron (MLP) neural network is used to model the WEDM of TiB2 nanocomposite ceramic. The obtained results have demonstrated very good modeling capacity of the proposed neural network. Furthermore, analyses have appropriately presented the influence of process parameters on state variables.
Experimental Study of Dynamic Fracture Behavior of PVB Laminated Glass by High-Speed Photography
Authors: Zhu Meng Yi , Liu Bo Han , Sun Yue Ting , Xu Jun , Yao Xue Feng , Li Yi Bing
Published: October 2010

The dynamic fracture behavior of PVB laminated glass during impact has been studied by both theoretic and finite element approaches. To make the analysis of cracking on PVB laminated glass more accurate and direct, high-speed photography method is introduced in this paper. Different crack patterns as well as their sequences of appearance are visualized. Finally, typical crack is measured in order to obtain important fracture characteristics such as crack velocity and acceleration.
Numerical Simulation of Riveting Process
Authors: Zhang Hong Shuang
Published: October 2010

In order to fully understanding the distribution of residual stress after riveting and the relationship between residual stress and riveting process parameters during riveting, Finite Element Method was used to establish a riveting model. Quasi-static method to solve the convergence difficulties was adopted in riveting process. The riveting process was divided into six stages according to the stress versus time curves. The relationship of residual stress with rivet length and rivet hole clearance were established. The results show numerical simulation is effective for riveting process and can make a construction for the practical riveting.
Parameters and Experiments on the Precision Forming Process of Spline Cold Rolling
Authors: Liu Zhi Qi , Song Jian Li , Qi Hui Ping , Li Yong Tang , Li Xu Dong
Published: October 2010

Cold rolling precision forming process of spline is one of the high-efficiency, precision and non-chip forming advanced manufacturing technologies. It has the characteristics such as high forming efficiency, energy-saving, low material consumption and better forming properties of components. The process and principle of involute spline cold rolling precision forming was analyzed. A measuring and testing system for the force and energy parameters in the forming process was set up, and the real-time variation curves of the torque moment of the spindle and the radial feeding force were obtained. Also, the influencing rules of process parameters on the maximum radial feeding force and spindle torque were investigated. Finally, Precision forming experiments of involute spline cold rolling were carried out with optimized parameters. Precision measuring and hardness testing of the tooth outline section shows that the components obtained by the experiments were free of defects. Compared with the spline components obtained from conventional cutting process, the hardness and wear ability was greatly improved, which is suitable for the requirement of application.
Optimal Design of Structural Vibrationbased on Stochastic Finite Element
Authors: Mo Wen Hui
Published: October 2010

In this paper, material properties, geometry parameters and applied loads are assumed to be stochastic, the vibration equation of a system is transformed to a static problem by using the Newmark method and the Taylor expansion stochastic finite element method (TSFEM) is extended for the structural vibration analysis. The optimal design of structural vibration based on stochastic finite element is presented. An example is given respectively and the calculated results are compared to validate the proposed methods.
Association Rules Mining in Manufacturing
Authors: Tan Jun , Bu Ying Yong
Published: October 2010

In recent years, manufacturing processes have become more and more complex, manufacturing activities generate large quantities of data, so it is no longer practical to rely on traditional manual methods to analyze this data. Data mining offers tools for extracting knowledge from data, leading to significant improvement in the decision-making process. Association rules mining is one of the most important data mining techniques and has received considerable attention from researchers and practitioners. The paper presents the basic concept of association rule mining and reviews applications of association rules in manufacturing, including product design, manufacturing, process, customer relationship management, supply chain management, and product quality improvement. This paper is focused on demonstrating the relevancy of association rules mining to manufacturing industry, rather than discussing the association rules mining domain in general.
Time-Wavelet Energy Spectral Analysis for Fault Diagnosis of Rolling Element Bearings
Authors: Feng Zhi Peng , Zhang Jin , Hao Ru Jiang , Chu Fu Lei , Li Xue Jun
Published: October 2010

Periodic impulses in vibration signals and its repeating frequency are the key indicators for diagnosing the localized damage of rolling element bearings. A new method, so called time-wavelet energy spectrum, is proposed to extract the characteristic frequency of faulty elements. It is applied to analyzing the vibration signals of bearings under normal and faulty (with damage on outer race, inner race and ball respectively) statuses. The analysis results show that the time-wavelet energy spectrum is effective in extracting the repeating frequency of periodic impulses. It can not only extract the relatively significant fault feature of outer race damage, but also can extract the weaker fault features of inner race and ball damage.
A Wireless Sensor Network Based Vibration Monitoring System: Architecture, Principle and Validation
Authors: Feng Zhi Peng , Zhang Cheng Zhong , Xie Bin , Cao Jian Wei , Li Xue Jun
Published: October 2010

Wireless sensor network overcomes the limitations of conventional tethered measurement techniques. It can be used in many situations where conventional tethered sensors cannot be employed due to the safety requirements, space limitation, and wiring cost. Thus it can further expand testing area, and improve measurement performance. A vibration monitoring system is developed based on wireless sensor network. Its architecture and principle are introduced, and its performance is validated by signal generator simulation and a gearbox vibration test.
Investigation of Machinability in Minimum Quantity Lubrication Milling of GH4169 Aerospace Superalloy
Authors: Yuan Song Mei , Yan Lu Tao , Liu Wei Dong , Liu Qiang
Published: October 2010

Due to environmental concerns and the coming legislations, pollution-free and eco-friendly minimum quantity lubrication (MQL) technology has become focus of attention in manufacture field. The MQL and cooling system in this work has been designed, fabricated and used. The cutting performance of MQL with cooling air compare with the conventional cooling method in milling of GH4169 aerospace superalloy is evaluated based on analysis of cutting force and surface finish. The effect of cutting parameters (depth of cut, feed rate) on machining performances is analyzed. The experimental results show that, the application of MQL and cooling air brings about a lower cutting force, better surface finish compared to conventional coolant environment.
A Monitoring and Diagnosis System for Heavy Duty Diesel Engines: Design, Implementation and Application
Authors: Feng Zhi Peng , Liu Li , Wang Ping
Published: October 2010

A condition monitoring and fault diagnosis system for heavy duty diesel engines used in off-highway vehicles is developed. Via this system, the vibration, rotating speed or angle, temperature and pressure signals can be collected simultaneously at a high speed. The software is developed using virtual instrument technique. The system provides various types of signal analysis methods, and manual and intelligent diagnosis functions. Its performance is validated in engineering practice. The system can be generalized for monitoring and diagnosis of various reciprocating engines.
Structure Improvement of the S Beam Based on the Safety of SUV
Authors: Wu Jun , Cao Li Bo , Chen Tian Zhi , Hu Chen Chen , Jiang Bing Hui , Chen Huan
Published: October 2010

The S beam of a production SUV appeared instable deformation in frontal crash test, which was not beneficial to occupant protection. So the deformation of S beam should be controlled to improve the crashworthiness. Inner improvement structures were proposed according to the prototype S beam. A frontal crash FE model and a multi-rigid body model were developed and validated to investigate the crash safety of frontal impact. The influences of the improvements to the deformation of S beam and the energy absorption of longitudinal beams were analyzed by the FE model, and the injury risks of head and thoraces were analyzed by the multi-rigid body model. The better improvement structure was adopted in the frame for the crash test to validate the effectiveness of improved scheme, and the result shows better crash performance of frontal impact for prototype vehicle. Meanwhile, simulation study on crash safety of 40% offset crash were also conducted, which indicated that improved scheme was also beneficial for crash safety of 40% offset crash.
Simulation and Analysis of EDM Notch Process Based on Killing and Activating Elements
Authors: Liu Chen , Zhang Le Le , Zhang Yong Jun , Qin Fang
Published: October 2010

For the theory and feature of EDM notching, the actual situation thermal model was established; by finite element method, EDM notch process base on killing and activating elements was successfully simulated, thermal and stress after notching was analyzed, while the conditions and mechanism of cracks generation was discussed.
AFM，XPS and Raman Study on Low Temperature Ammonia Plasma Treatment of Carbon Fiber
Authors: Zhu N.S. , Ma S.N. , Hu C.H.
Published: October 2010

Low temperature ammonia plasma surface treatment on asphalt base carbon fiber is reported with 150°C for 60min, 200°C for 60min and without treatment. The surface topography, chemical composition and structural changes were followed by Atomic force microscope(AFM), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy, of which indicate the treatment could improve the density of carbonyl and amino functional group on the surface of carbon fiber, which can also changed carbon crystalline structure. The density of carbonyl and amino functional group was shown higher for the fibers treated at 150°C than for the fibers treated at 200°C which could be attributed to the temperature and introduced Si element factors.
Genetic Algorithm Based Product Innovation Design Methods and its Application in Bag Design
Authors: He Xiao Dong , Li Hai Ying , Wu Jian Wu , Liu Xiao Jian
Published: October 2010

Based on an interactive genetic algorithm implemented the bags innovation design and optimization, a structure that contains 10 operators system integrity algorithm is built, including individual programs, constraints structure, species maintenance, individual evaluation, selection, restructuring, variation, optimization control, decoding and interactive selection. The bags visualization species have been constructed, and the optimization methods can be realized through crossover and mutation genetic manipulations. The experimental results confirmed the effectiveness.
Nonlinear Transient Analysis of Butt Welding Based on Finite Element Method
Authors: Zheng Jian Yi , He Wen , Shen Run Jie
Published: October 2010

The butt welding of 45 carbon structural steel has been analyzed using a nonlinear transient finite element (FE) model. With numerical analysis technology, welding heat transfer and thermal elasto-plastictity have been progressed. Also the effects of welding seam growth with heating source movement have been studied using the birth and death technique. For this purpose, a 3-D structural and thermal direct-coupled solution has been used to obtain the temperature changing curves and residual stresses distributions. In addition, the variations of physical properties of material with temperature have been taken into account. Results indicate that the heating speed of welding is rapid, and the distributions of residual stresses are not symmetrical along the welding seam’s centerline, and the residual stresses are change along the welding direction and also in the plate-thickness. It has been shown that use of 3-D direct coupled-field and nonlinear transient model will lead to more accurate and realistic results.
Gear Reliability Design Using Probability Finite Element Method Based on Response Surface
Authors: Sun Shu Xia , Yan Ming , Bai Ping , Han Li
Published: October 2010

The paper studies on the gear reliability design method using probability finite element method based on response surface and it indicates that the reliability sensibility calculation method of function in response surface can be used when limit state function is unknown. The limit state function established on response function is quadratic polynomial with simple form and it makes the calculation of variance and deviation very convenient, which realizes the simple and easy calculation of reliability sensitivity and largely increases calculation velocity and precision. The method can be applied for general purpose with certain standard, which is easy for programming and accomplishing gear reliability design in a rapid and precise way.
Research on Innovative Product Design Method and Support System for Man-Machine Cooperation
Authors: Liu X.Y. , Yin Yang , Zhou L.P.
Published: October 2010

According to the limitations of existing innovative design methods, a research ideology was proposed, namely man-machine intelligent collaboration. Based on this ideology, the characteristics of information exchange between human information processing system and external design environment was analyzed, and the inherent mechanism of man-machine intelligent collaboration was explored. Moreover, some cognitive principles that the support system should follow were put forward. In terms of the characteristics of product design, incorporating cognitive science, information technology, and design technology, a computer-aided innovative product design process was presented. Finally, a preliminary prototype system of computer-aided design for product innovation was developed based on the theoretical researches aforementioned and some running instances of the prototype system were described.
A Policy-Oriented Reputation BDI Model
Authors: Hu Jun , Yu Yang
Published: October 2010

Computational trust and reputation models have been recognized as one of the key technologies required to design and implement agent systems. These models manage and aggregate the information needed by agents to efficiently perform partner selection in uncertain situations. In this paper, by taking advantage of the non-monotonic knowledge representation and reasoning mechanisms of defeasible logic, a reputation-Oriented Agent model is proposed, which is capable of accepting policy guidance, the real-time rule modifications, and handling the run-time rule conflicts. This agent is both autonomous and controllable, and is able to cooperate with other Agents via contracts in an open and dynamic environment.
Inverse Mode Problem in the Discrete Model of Circular Plate Axial Symmetry Vibration
Authors: Wang Qi Shen , Wang Yang , Zhang Li Hua
Published: October 2010

Using the second-order center difference scheme, the difference discrete model of axial symmetry vibration of a circular plate with arbitrary supports was established. In this paper, the stiffness matrix of the discrete model is proved as a sign-oscillation matrix, obtaining the qualitative properties of the axial symmetry vibration of the system. Furthermore, the inverse mode problem was raised and solved. Three examples of the numerical computation were also given in the paper.
Overview of Policy-Oriented and Trusty Multi-Agent System Research
Authors: Li Rui Fang , Hu Jun
Published: October 2010

In a multi-agent system, the behavior of agent is difficult to be predicted and controlled reliably because of agent's autonomy, thereby which causes the “trust” crisis that whether the overall goal can be completed or not. In this paper, the multi-agent system credibility of research is introduced from the trust and reputation, and the existing collaboration systems are pointed out that which is lack of controllability and credibility, finally the method of solving credibility of multi-agent system is proposed, namely a two-tier policy-oriented mechanism and a credibility ensuring principle. The executing of system is controlled and guided from looking the collaborators, collaboration established, consultations and negotiations and other sectors, thus the implementation behavior of the system is ensured that which is controllable and trusty.
Porous Media Modeling with Integrated Approach and Application in Water Flow Simulation
Authors: Liang Yue , Chen Liang , Yan Xiao Lu
Published: October 2010

The porous media for liquid transporting and mechanical analysis, which are the hotspot studies in contaminant transport and machinery manufacturing, is hard to model in the computing simulation for the complexity of the media’s porosity. In the paper, an integrated approach is proposed to model the porous media with the framework of but not limited to sphere particles. Firstly, a series of particles are generated according to the grading curve in a closed box with the PFC3D, and then let the particles deposit freely for the gravity. After that the position and radium of each particle are exported to a file for import of AUTOCAD, where the particles are re-generated by the VBA script and the model for particles is constructed. The needed model is the porosity among the particles, so the model size is determined by a block and the model is gotten with the Boolean Operation which subtracts the particles from the block. And then with the different boundaries, the water transporting simulation in the porous media model is carried out with the Finite Volume Method (FVM). The results are proved reasonable by the previous studies.
Using Particle Swarm Optimization Based Neural Network for Modeling of Thrust Force Drilling of PA-6/Nanoclay Nanocomposites
Authors: Reza M. , Yazdi Soleymani , Razfar M. Reza , Asadnia M.
Published: October 2010

This paper presents a newly approach for modeling thrust force in drilling of PA-6/ Nanoclay Nanocomposites materials, by using Particle Swarm Optimization based Neural Network (PSONN). In this regard, advantages of statistical experimental algorithm technique, experimental measurements, particle swarm optimization and artificial neural network are exploited in an integrated manner. For this purpose, numerous experiments for PA-6 and PA-6/ Nanoclay Nanocomposites are conducted to obtain thrust force values by using drill of high speed steel with point angles and 2mm in diameter. Then, a predictive model for thrust force is created by using PSONN algorithm. Also, the training capacity of PSONN is compared to that of the conventional neural network. The results indicate that nanoclay content on PA-6 polyamide significantly decrease the thrust force. Also, the obtained results for modeling of thrust force have shown very good training capacity of the proposed PSONN algorithm with compared to that of a conventional neural network (BPNN).
Application and Technology of Generalized Green Computing
Authors: Deng Jia Bin , Hu Juan Li , Wu Jue Bo , Chi He Hua
Published: October 2010

. In this paper, we propose the concept of generalized green computing and give the limit and the scope for it, including the research task and relationship. Firstly, according to the aspects of computer system, we emphatically analyze the negative influence of computer system bringing to natural environment. Secondly, we introduce the technology and method of generalized green computing in order to analyze the deep meaning of technology hidden behind. We also put forward implement scheme of generalized green computing for research institutions and enterprises. Thirdly, we present some basic ideas and approaches of generalized green computing, aiming to form the foundation of generalized green computing on specific model, methods and tools.
Viscosity Variation of Polymer Solution through Low Permeability Cores
Authors: Zhang Li Juan , Yue Xiang An , Chen Hua Wei , Zhang Jie , Chen Tang Suo
Published: October 2010

Viscosity loss occurs in polymer flooding in middle and high permeability reservoir. For larger specific surface and more clay in low permeable rock, the actual viscosity of polymer solution is more important. Polymer cores’ flow experiments are reported which were performed using long natural geological outcrop sands cores. These cores were in good simulation of natural cores and the length of cores allows viscosity variation mechanisms that occur when polymer solution flows through long distance. These mechanisms can not be assessed by silica cores of conventional length. Results of polymer cores’ flow experiments gives viscosity of polymer solution after it through different permeability cores, and the effects of molecular weight, concentration of polymer, migration distance, permeability, and injection velocity on viscosity loss rate. Results show the molecular weight and concentration of polymer is higher, or the core’s permeability is lower, and the viscosity loss of polymer solution through cores is greater. Injection velocity is found to be insignificant within 15m/d for polymer with middle or low molecular weight. This simulation work confirms the viscosity loss mechanism for one polymer in low permeable cores.
Numerical Calculation for Subsonic Compressible Supercavitating Flow over Disk-Cavitator
Authors: Meng Qing Chang , Zhang Zhi Hong , Liu Ju Bin
Published: October 2010

A finite volume method has been formulated based on the ideal compressible potential theory. By using the continuity equation and Tait state equation as well as Riabouchinsky closure model, an "inverse problem" solution has been presented for the supercavitating flow. According to the impenetrable condition on the surface of supercavity, a new iterative method for the supercavity shape has been designed to deal with the effect of compressibility on supercavity shape and pressure field. The supercavity shape changes from ellipse to taper, as well as the drag coefficient increases with Mach number increasing. The results compare well with the experiment data and empirical formula, and the numerical method is proven to be valid.
Research on the Efficient Cylinder Cutting on CNC Boring Machine Combining with Self-Made Welding Cutter
Authors: Feng Jin Chun , Wu You De , Zhu Chao , Yang Lin Jian , Li Lei
Published: October 2010

Because of the combination of self-made or common boring bar and CNC program, we machined two external cylinders used for tightening ring (φ500u6(+0.58/+0.54)×130mm ) of a vertical roller mill, and conquered the difficulty on machining high-precision cylindrical on the boring machine. This process improvement not only brings the machining advantage of CNC machine tools into full play, but also organically integrates conventional boring to turning methods, which can cause high machining efficiency. Since the special tooling is not needed and it’s easy to obtain materials from local sources, we can adjust the process in a large range. The implementation of this processing method is meaningful for the reference and promotion of processing such short cylinder by turning on the boring machine.
Simulation and Analysis of Crashworthiness of Thin-Walled Structures
Authors: Zhang Xiao Yu , Zhang Le Le , Zhang Bao Fu , Ma Cong
Published: October 2010

The deformation process and crashworthiness of the structures is the research object by the numerical method in the paper. Based on the efficient model for
simulation and successful calculation, the impact response and energy absorption of four thin-walled structures has been analyzed and estimated by the simulation of impact process.
Finite Element Analysis of a Flexible Ferris Wheel
Authors: You Gui Mo , Ding Jie Min , Yang Hui Zhu , He Zhi Jun
Published: October 2010

With ANSYS finite element analysis software, finite element method was used to analyze the flexible Ferris wheel in this paper. By obtaining stress and deformation of the structure strength and stiffness was calculated and assessed. Improvements were made on this basis to meet the design requirements. With stability and dynamic analysis structure has good global stability and the frequency spectrum of structure is dense and even distribution. The analysis procedure and results indicated in this paper can be used as a reference for the analysis and design of similar projects.
Use of D-InSAR Technique for Monitoring Ground Subsidence in the Yanzhou Coal Mining Area (China)
Authors: Wang Zhi Yong , Zhang Jin Zhi
Published: October 2010

In this paper, it monitored ground subsidence in the coal mining area using two-pass D-InSAR technique. We obtained 9 ALOS PALSAR single-look complex (SLC) images in Yanzhou coal mining area from December 2007 to Februay 2009. Based on SAR interferometric pairs and SRTM DEM, we detected the subsided areas and got the vertical subsided quantity. We got the ground subsidence maps in different stages from 2007 to 2009. Several important subsided areas were selected and then analyzed in detail. It analyzed the general laws of mining subsidence. The results indicated that two-pass D-InSAR technique based on L-band PALSAR data and SRTM DEM is a very simple, rapid and efficient way to detect and to monitor ground subsidence in the coal mining area, even in the areas with vegetation covered.
The Design of Ternary Joint Robot Fingers without Drive Based on the Topological Graph of Kinematic Chain
Authors: Zhou Wan Chun , Wu Bo
Published: October 2010

The mechanism of original ternary joint robot fingers without drive is analyzed into several component. After its type and number is confirmed , we gain circular topological graph of kinematic chain with topological theory. Based on it, all the generalized kinematic chain is constructed. And so is evolved a series of regenerating kinematic chain and corresponding new type of mechanical graph according to specialized restriction. A designer can choose the new mechanism which is different from original one. The new one has better function, so the designer can realize his innovating design of three-joint robot fingers without drive.
China Logistics System Reconfiguration under the System Resource Constraint after the Financial Crisis
Authors: Zhao Jian Hua , Li Hong Bin , Chen Qian , Luo Fang
Published: October 2010

After two generations’ development driven by investment and external market resource from 1949 to 2008, china formed an export-oriented economy with an Outward Logistics System (OLS). China faces serious constraints from international market under the global financial crisis, which caused Logistics Jam and need Economical transformations to launch a new round of economic growth with more efficient Logistic system in next 30 years to ease jam and to support regional manufactory based on the local special resources for co-development. It would be the power to stimulate further economic growth.
Effect of the Content of Sn on Microstructure and Mechanical Properties of Bi5Sb Solder Alloy
Authors: Tang Kun , Yan Yan Fu , Zhao Kuai Le , Sheng Yang Yang , Feng Li Fang
Published: October 2010

By alloying principle, a novel quaternary high-temperature lead-free solder was formed by adding trace Sn into Bi5Sb2Cu. The influences of trace Sn on the microstructure and mechanical properties of the novel solder alloy were systematically investigated. Results show that the new phases â-SnSb and mesh Sb2Sn3 are formed and dispersed in the novel solder, whose dispersion strengthening make the tensile strength and shear strength of the new solder alloy increase. When Sn is less than 8 wt%, the tensile strength and the shear strength of the new solder increase with the increasing of content of Sn. When Sn is 8wt%, the tensile strength and shear strength is respectively 52.79MPa and 17.00MPa, which is respectively improved about 90.6% and 64 wt.% compared to the matrix solder. When Sn is 10wt.%, the mechanical properties of the solder take a decrease trend, but they are still better than those of the matrix solder.
Dynamic Buckling of Composite Bars Subject to Axial Impact
Authors: Kang Chao , Han Zhi Jun , Lu Guo Yun , Zhang Shan Yuan
Published: October 2010

The dynamic buckling of composite bars subject to axial rigid body impact are simulated using the finite-element software ABAQUS6.8. The critical velocity and the bifurcate time are obtained by stain-time curve and effects of fiber angle and impact velocity on dynamic buckling behavior of composite bars are also investigated. The results indicate that the ply angle and impact velocity have an influence on dynamic buckling of composite bars.
Decomposition Model Based on Optimal Power Flow in Interconnected Electricity Networks
Authors: Wang Qing Ran , Zhang Li Zi
Published: October 2010

In order to adapt to the current multi-level dispatching management system and to promote the operational efficiency of interconnected electricity networks, this paper proposes a decomposition collaborative model based on optimal power flow theory. The model is a quadratic programming question used to solve optimal power flow model. The information of interchanging between regions is communication price and boundary nodal bus phase angle. IEEE 30-bus test system demonstrates the validity and novelty of the model that the regional network can be calculated reasonably and the development of cross-regional electricity transaction is promoted effectively.
Research on Evaluation Index System for Green Manufacturing Based on PSR Model and Life Cycle
Authors: Wang Qing Song , Yuan Xue Liang , Cao Da Yong , Ma Chun Yuan , Zhang Kai
Published: October 2010

Green manufacturing is the important manufacturing pattern to achieve sustainable development. The core is to reduce the damage on the environment and to realize sustained rapid economic growth. The Paper establishes evaluation index system of green manufacturing using life cycle theory and the “pressure - state – response” model. The index system is the 3-tier indicator system, a total of 39 sub-indicators, including 17 environmental attributes index, 8 energy property index, 7 resource properties index and 7 economic attributes index.