bluuebunny/crossref_metadata_2025 huggingface dataset:
Analysis on Fuzzy Evaluation of Green Design Based on Life Cycle
Authors: Zhang Yan
Published: October 2010

Green design is a key technology of green manufacturing. Compared with traditional design, green design requires taking into account the environment factors and pollution prevention measures in the product design during the designing phase. The basis to build an evaluation system of green design based on life cycle is a combination and integration of data and knowledge of different phases in product life cycle. Hence, this paper builts a hierarchy structure model of green design under influence of many factors according to the frame of ISO 14000, determines the weight of each factor based on experts’ opinion, and makes a systematic evaluation on the performance of green design based on fuzzy hierarchy evaluation principle.
Compressive Strength and Splitting Tensile Strength of Steel Fiber Reinforced Ultra High Strength Concrete (SFRC)
Authors: Zhang Ju , Yan Chang Wang , Jia Jin Qing
Published: October 2010

This paper investigates the compressive strength and splitting tensile strength of ultra high strength concrete containing steel fiber. The steel fibers were added at the volume fractions of 0%, 0.5%, 0.75%, 1.0% and 1.5%. The compressive strength of the steel fiber reinforced ultra high strength concrete (SFRC) reached a maximum at 0.75% volume fraction, being a 15.5% improvement over the UHSC. The splitting tensile strength of the SFRC improved with increasing the volume fraction, achieving 91.9% improvements at 1.5% volume fraction. Strength models were established to predict the compressive and splitting tensile strengths of the SFRC. The models give predictions matching the measurements. Conclusions can be drawn that the marked brittleness with low tensile strength and strain capacities of ultra high strength concrete (UHSC) can be overcome by the addition of steel fibers.
Experimental Study on Early Anti-Cracking Properties of Polyvinyl Alcohol Fiber Reinforced Cementitious Composites
Authors: Liu Shu Guang , He Cun , Yan Chang Wang , Zhao Xiao Ming
Published: October 2010

This paper mainly studies early anti-cracking of cementitious composites containing polyvinyl alcohol (PVA) fiber and fly ash (FA). The PVA fibers were added at the volume fractions of 0%, 0.25%, 0.5%, 1.0% and 2.0%. The percentages of FA used in the experiment were 0% and 15%. Experimental results show that the maximum crack width and total crack area can be reduced with the increase of volume fraction of PVA fiber, and that no crack appeared at the volume fraction of 2.0%. The reducing tendency of crack width and total crack area kept constant with addition of FA, but reducing amplitude decreased. When the PVA fiber volume fraction remains constant, the early anti-cracking properties of cementitious composites containing PVA fiber and common cement are superior to one containing PVA fiber and FA. Conclusions can be drawn that the early anti-cracking properties of cementitious composites can be improved by PVA fiber.
An Artificial Immune System for Frequency-Variable Air Conditioner
Authors: Liu Xue Peng , Zhao Dong Mei , Wang Bin
Published: October 2010

It is common to control the Frequency-variable air conditioner (A/C) by using PID controller. However, an arithmetic based on artificial immune system was proposed. The immune system of organism was analyzed, and an architecture of the arithmetic was designed. The A/C behaviors were expressed by antibodies, a concentration model of antibody was built, and rules of A/C behaviors could be obtained by the antibody concentration. the initial immune response arithmetic and the secondary immune response arithmetic were designed, which were used to memorized normal behaviors and detect abnormal behaviors. Experiments show that the scheme is capable of adapting to system variation. The system can obtain the stable condition with good convergence even high temperature of 45°C
Characterization and Tribological Behavior of Ni-Base Alloy Coatings Prepared by Electro-Spark Deposition
Authors: Tan Ye Fa , Cai Bin , Jiang Guo Liang , Xu Ting , Zhou Chun Hua , Tan Hua
Published: October 2010

Ni-base alloy coatings on carbon steel surface were prepared by electro-spark deposition technology and the characterization and tribological behavior of the coatings were investigated. The research results show that the microstructure of Ni-base alloy coating can be divided into three typical areas: the white alloy zone, transition zone and overheating-affected zone. The hardness across the interface of the coating and substrate, in which chemical elements transferred from the coating to substrate, gradually decreases with the depth away from the coating surface. The friction coefficient slightly decreases, while the wear loss increases with the increase of load. The main wear mechanism of the coating is micro-cutting wear at light load friction, and gradually changes into mixture of micro-cutting wear, multi-plastic deformation wear and adhesive wear at heavy load friction.
Microstructure and Tribological Properties of Ni-Co/SiC Coatings Prepared by Occlusion Electroplating for Grinding Tools
Authors: Tan Ye Fa , Cai Bin , Tu Yi Qiang , Xu Ting , Tan Hua , Zhou Chun Hua
Published: October 2010

In order to improve the grinding performance and service life of electroplating composite coatings with high percent of hard abrasives, the composite coatings of Ni-Co/SiC were prepared by occlusion electroplating technology and their microstructure and tribological properties were studied. The research results show that the cathodal electric-current density in occlusion electroplating process and the SiC abrasive size have great influence on microstructure and tribological properties of Ni-Co/SiC coatings. The optimum value of cathodal electric-current density is 1 A/dm2 and the proper SiC abrasive size is about 20 μm, in which the Ni-Co/SiC coatings have excellent wear resistance and high grinding ability. The main wear mechanisms of Ni-Co/SiC coatings are micro-cutting and adhesive wear of matrix alloy, and micro-cracking wear and spalling of SiC abrasives.
Research on Abrasive Wear Resistance of Cemented Carbide Welding Coatings for Debris-Ejecting Blade of Driller
Authors: Tan Ye Fa , Wang Xiao Long , Jiang Guo Liang , Cai Bin , Tan Hua , Zhou Chun Hua
Published: October 2010

In order to improve the wear resistance of debris-ejecting blade of driller, cemented carbide welding coatings were prepared by arc-welding technology. The abrasive wear behavior and wear mechanisms of cemented carbide welding coatings were researched under both dry and water friction conditions. The research results show that the wear rates of the coatings increase with the increase of loads and sliding speeds. The influence of sliding speeds on wear rates of the coatings becomes intense as the increase of loads. The wear rates of the coatings under water friction conditions are bigger than those under dry friction conditions. The main wear mechanisms of the coatings are micro-cutting and multi-plastic deformation wear of matrix metal, and micro-cracking and brittle fracture as well as spalling of WC particles.
Effects of Additional Mass on Modal Experimental Analysis of 3-Dimension and 5-Direction Braided Composites
Authors: Gao Yan , Li Jia Lu
Published: October 2010

The work of vibration test has significant meanings for the researches and applications of 3-dimension and 5-direction braided composites. This article discusses the effects of added mass with different weight on the modal test of 3-dimension and 5-direction braided composites. The comparison of the modal parameters of 3-dimension and 5-direction braided composites tested by different weight of mass reveals that the additional mass is a mostly influence factor for vibration property of 3-dimension and 5-direction braided composites. The results of frequency response and force response curves show that smaller mass accelerometer is more effective for a wider range of frequencies around the resonance frequency, a higher natural frequency and a larger peak in these points. Force-response curves show that force response amplitude increases with the increase of additional mass weight, and the larger additional mass, the shorter time taken for reaching stationary state. The errors of natural frequency and damping ratio increase when the weight of additional mass increases. With the increase of modal orders, relative errors of modal characteristics have slighter decreasing degrees. The results derived from this article will provide a useful reference for precise modal analysis of 3-dimension and 5-direction braided composites.
Synchronous Suspension Control Study for Spherical Reluctance Driving Joint with Magnetic Levitation
Authors: Zen Li , Wang Jun , Xu Yuan Yuan
Published: October 2010

This paper presents a novel Multi-Degree-of-Freedom magnetic levitation sphere driving joint. It analyses the relevance theory of air-gap magnetic energy of the mechanic and electric energy transformation while the magnetic levitation force and electromagnetic torque were generated by driving joint, which based on the principles of state reconstruction. It achieves state synchronization suspension control and self-test feedback control without sensor of the rotor. The simulation experiment shows that the state synchronization suspension control owns high precision and interference immunity.
Permanent Deformation Behavior of Composite Structure Asphalt Concrete
Authors: Li Pei Long , Zhang Zheng Qi , Wang Bing Gang
Published: October 2010

In order to study the high-temperature performance of composite structure asphalt concrete specimens, cylindrical and plate double-layer specimens with two asphalt mixtures are prepared to conduct uniaxial repeated load permanent deformation test and wheel tracking test. The deformation behavior and mechanical characteristics are analyzed and the relationship between rut deformation and mechanical parameters are also discussed. In addition, according to finite element analysis, the deformation mechanism of composite structures under the same loads was discussed. The results and analysis indicate that the deformation behaviors of the specimens with different structures are different significantly despite the same total thickness. Among those specimens, S（4/6）has the smallest deformation and corresponding mechanical parameter εp/Fn is also the smallest under the same load. The maximum shear stresses and their occurrence in different positions for different composite structures have discrepancies. The maximum shear stress of S（4/6）is smaller than other structures, which appears in the upper layer having better high temperature performance. This is the reason that the resistance to permanent deformation of S（4/6） is best among the three composite structures.
Application and Non-Homogeneous Index Grey Model NIGM(1,1,k)
Authors: He Zhe Ming , Luo You Xin , Zeng Bin
Published: October 2010

To improve the modeling accuracy of grey model and broaden its application fields, a non-homogeneous index grey model (termed NIGM(1,1,k)) was built, which is based on the non-homogeneous dispersion index function and the formula computing the parameters of grey model NIGM(1,1,k) was proposed through the least square method. The function of the time response sequence of the proposed grey model was solved by taking differential equations as a deductive reasoning tool. The proposed grey NIGM(1,1,k) model has the characteristic of high precision as well as high adaptability. Examples validate the practicability and reliability of the proposed model.
Investigation on the Subsynchronous Vibration Fault Diagnosis and Control for Centrifugal Compressor
Authors: Wang Wei Min , An Wei Zheng
Published: October 2010

Centrifugal compressors are widely used to compressor gas in many different processes within the petroleum and chemical industry. Two vibration types of concern in industrial compressors are synchronous and subsynchronous vibration. The latter, more troubling type of vibration, occurs when non-conservative whirling forces(Cross-coupling) act to excite a lateral natural frequency, which lies below the running speed(subsynchronous vibration). In this paper, more attention is paid to impellers from a rotordynamic standpoint and a synthesis gas compress in ammonia plant is analyzed in order to diagnosis the root cause of vibration fault using the best available resources for seals and bearing. Logarithmic decrement predictions for the full rotor model consisting of all the stages and seals are conducted under different bearing structure. On this basis, a resolvent to improve the rotordynamic stability is presented. The field application result indicates that this method is effective.
Study on the Automation Method of Regular Expression to Finite Automaton
Authors: Cao Qiong , Huang Xian Ying , Wang Ke Ke , Yin Jing
Published: October 2010

Regular expression was the foundation of advanced language and compiler. It can be recognized by finite automaton. In this paper, combined with operator priority analysis and the rules of regular expression, the table of priority relationship between operators involved in regular expression has be constructed. Based on the table, realized the automatic convert from regular expression to finite automaton, and the program is given. It provided a new reference of regular expression convert to finite automaton.
A New Simulating Model of Wireless Channel - Rayleigh-Normal Model
Authors: Zhang Ao Feng , Liao Zhi , Qu Xi Long
Published: October 2010

Simulating and researching for characteristics of channel is essential when designing a wireless communications system. Based on the research of existed simulating methods, this paper proposed the Rayleigh-Normal simulating model which looks received signal as the linear combination of Rayleigh stochastic process and Normal stochastic process. This method was used to simulate the first-order statistical characteristics of Rayleigh model, Ricean model, Nakagami model, Lognormal model and so on, the simulating results prove that Rayleigh-Normal simulating model is a correct and valid simulating model for wireless channel.
Equivalent Elastic Modulus of the Open-Cell Cellular Solids
Authors: Kang Ying An , Tan Jia Cai
Published: October 2010

The useful properties of cellular solids depend on the material from which they are made, their relative density, and their internal geometrical structure. Based on two simple models (two-dimensional honeycomb and three-dimensional prism)of cellular structures, equivalent Young’s modulus related to the relative density is derived, and the theoretical results are found to be in good agreement with experimental data of open cell aluminum foams. And the results provide evidence that the three-dimensional prism model is reasonable, which two models are approximately true at low density.
Geographic Profiling Methods: Improvement and Combination
Authors: Chu Hong Jiang , Wu Yue , Lin Wen Yun , Wan Yue Hua
Published: October 2010

Geographic profiling uses locations of series crimes to detect the most probable residence of the offender. However, because of shortage of other information, the method doesn't perform well. To Solve this problem, the concept of geographic profiling was extended and a concept of human geographic profiling (HGP) was put forward to take offender’s bias, victims’ characteristics, and geographical circumstances into account. The physical geographic profiling (PGP) was obtained by combining an improved “spatial mean” method and an improved criminal geographic targeting (CGT) model by using a precisely deduced "Combination Function". Afterwards, HGP and PCG were combined by the same function. The resultant product was a three-dimentional probability map. Simulation result indicated high accuracy rates among which the lowest is 66% under an ideal situation. The introduction of HGP and deduction of combination function are discussed originally and are of great importance in this paper.
The Study on Organizational Change and Efficiency Based on Virtual Manufacturing
Authors: Wang Ying , Wang Zhi Bo
Published: October 2010

The author not only made an analysis on the emergence, development, change process of the virtual enterprise based on the virtual manufacturing and its key technology, but also summarized the internal logic between the development of virtual technology and the corresponding organizational model changes. Further, the author discussed the core elements which affect the efficiency of virtual organization. Through comparison with the traditional organization model, the efficiency characteristics of virtual organization have been revealed. Final, the author concluded that the core competitive power of virtual enterprise is its flexibility and reconfigurability, and the disadvantage is the instability of organizational relationships.
Study on Electron Beam Welding of AZ61 Magnesium Alloy
Authors: Ye Hong , Yang Han Li , Yan Zhong Lin
Published: October 2010

Electron beam welding process of AZ61 with 10mm thickness magnesium alloys was investigated. The influence of processing parameters including focusing current, welding beam current and welding speed was researched. The results show that an ideal weld bead can be formed by choosing processing parameters properly. Focusing current is main parameter that determines cross section shape. The beam current and welding speed are main parameters that determine the weld width and dimensions. The test results for typical welds indicate that the microhardness of the weld zone is better than that of the base meta1. A fine-grained weld region has been observed and no obvious heat-affected zone is found. The fusion zone mainly consists of small α-Mg phase and β-Mg17A112. The small grains and β phases in the joint are believed to play an important role in the increase of the strength of weld for AZ61 magnesium alloys.
ANN Modeling for the Drop Impact Dynamics of Mobile Hard Disk
Authors: Yang Shu Yi , Liu D.S. , Wen Z.J. , He Y.F.
Published: October 2010

In view of complexity internal structure of mobile hard disk and according to the principle of quality equivalent, a finite element model of mobile hard disk was established. Finite element simulation with dropping impact of mobile hard disk was made based on uniform design. A neural network model of nonlinear mapping relations was established between shell thickness，actuator arm thickness, cantilever thickness and pivot bearings stiffness of mobile hard disk with shell stress，disk interface stress and space with head and disk. The difference is less of the prediction values with the ANN(artificial neutral network) and the simulation datum with the FEM(finite element method). This indicates that the method is effective and may provide theory evidence for optimization crashworthiness design.
Research on Comprehensive Utilization of Waste Rubber and Aged Asphalt
Authors: Ding Zhan , Shen Cheng , Jiang Jun , He Shao Ying
Published: October 2010

With the development of highway transportation and automotive industry, there have been a large number of waste rubber and waste asphalt mixture. If they cannot be recycled in time, it will not only become a waste of resources, but also cause serious environmental pollution. For the comprehensive utilization of waste resources, the asphalt recycling agent is developed using waste rubber by microwave treatment in light components agents. The flexibility and consistency with aged asphalt of old rubber are all improved by adding appropriate light-component auxiliary agent and the treatment of microwave processing technology. According to high and low temperature performance and anti-aging properties of recycling asphalt, orthogonal tests are designed to determine the reasonable ratio of raw material and the conditions of technology by penetration, softening point, ductility and penetration ratio and ductility after rolling thin film oven test (RTFOT).Test results and analysis indicate that the optimum proportion are 40% of DOP, 40% of aromatic oil, 20% of rubber powder and 0.5% of the total of anti-aging agent. The optimum conditions are 900w of microwave power and 10min of the processing time. Studies show that 10% of the recycling agent can effectively supplement missing components and restore colloidal structure and rheological performance of aged asphalt.
Analysis and Improvement of Random Number Generating Algorithm
Authors: Li Yong Fei , Zhao Qiao Fang
Published: October 2010

Random number is widely used in computer application. What is used commonly in practice is pseudo-random number generated by mathematical algorithm. Several useful pseudo-random number generating algorithm and random testing methods are discussed. And according to the disadvantage of traditional algorithm, improvement of pseudo-random number generating algorithm and some new methods to generate real-random number are summarized and analyzed.
Energy Absorption of Ultra-High Molecular Weight Polyethylene Fiber-Reinforced Laminates at High Strain Rates
Authors: Shi Bin Bin , Sun Ying , Chen Li , Li Jia Lu
Published: October 2010

Some dynamic compressive tests about Ultra-High Molecular Weight Polyethylene Fiber-reinforced laminated Composites have been done using SHPB experimental system．The stress-strain curves of UHMWPE Fiber-reinforced Composites of three different laminated angles (0/90°, 0/90/45/-45°, 0/90/30/-60/60/-30°) are obtained at higher strain rates and their dynamic mechanical properties are also investigated at the same time．Based on all the stress-strain curves obtained, the characteristics of energy absorption of UHMWPE fiber angle-plied composites are analyzed and discussed．It is found that laminated angle has made little effect on the dynamic energy absorption of composites at higher strain rates．In addition，delamination and compaction in the thickness direction constitute the main dynamic failure mechanisms, which are studied by means of image analyses for the specimens after compression.
Implementation of the JPEG on DSP Processors
Authors: Li Shi Jun , Qu Xi Long , Li Qiang
Published: October 2010

this paper introduces the design and implementation of JPEG image compression based on the high speed DSP TMS320VC5416 available from Texas Instruments. Especially, the realization and optimization of DCT transform is discussed and the image Lena is compressed with different way. Experiments show that the reconstructed images have PSNR above 34dB . JPEG algorithm is a digital image compression algorithm with high compression ratio, little distortion characteristics, and has been identified as international standards. This standard has been widely used in digital cameras, surveillance systems, mobile phones, video phones, and many other aspects. It is important to research and realize a real-time image compress system Using JPEG. DSP is used in real-time processing and portable applications with special hardware structure. DSP with high processing speed and excellent operation performance is particularly adapted to image processing. This article introduces DSP-based implementation of JPEG[1].
Design about the Laser Marking Machineof Two-Work Location
Authors: Zhang Zhong Jie , Mao Xin Ping
Published: October 2010

With the rapid development of social productive forces, the laser marking machine of one-work location has been difficult to meet the needs of large-scale production. In order to save time of to load parts, We design the laser Marking of Two-work location. The laser marking machine of two-work location. has two-work locations, when a work location load parts, other a work location is marking at the same time. Two work location alternate work , So significantly reduces the production of auxiliary time, improve production efficiency and meet customer needs. This design has been widely used in the domestic machining industry now, marking areas of laser marking in the domestic industry is still first.
Numerical Simulation of Agitated Flow Field of Submersible Mixer Based on Computational Fluid Dynamics
Authors: Xu Wei Xing , Yuan Shou Qi
Published: October 2010

The flow formulation is founded as console formulation first, and with the body-fitted coordinate system and standard turbulent model, the numerical simulation of the internal 3-D incompressible turbulent flow agitated flow field of submersible mixer is carried out by numerical simulation software Fluent. The results showed that: the mixer impeller produced vortex jet flow, the constant velocity lines advanced as ellipse, the velocity along the centerline are larger than others, and utilized volume flow to transport the liquid. And, by changing some design parameters of mixer impeller, we can compare and analyze the numerical simulation results and present some optimal methods.
The Quick and Simple Algorithm for Circular Interpolation
Authors: Zhang Jia Ying
Published: October 2010

In this paper, a quick and simple algorithm based on data sampling principle for circular interpolation is introduced. The algorithm uses a set of chord lines which having same corner angle to approxmate to circle. Comparing with the most other interpolation algorithm，this algorithm is quick, simple and being have little error for the circular interpolation. The algorithm is balanced with the speed and the accuracy of caculation well. The cutting process is more smoothly.
Analysis of Three-Axis Turntable for Motion Simulation Based on Virtual Prototyping
Authors: Chen Hong Li , Qiao Xin , Yang Xi Wei , Wu Chuan Yu
Published: October 2010

A turntable is needed to simulate the motion of ground vehicles in laboratory. Such a turntable was presented in the paper. The basic structure of the turntable was that it could rotate around their own 3 axis, thus all forms of motion of ground vehicles could be simulated. The mechanical performance of the turntable was studied by virtual prototyping method using software CATIA, including structural characteristics, centroid, moment of inertia and turning space. Mechanical analysis was performed, the deformation and stress distribution of the turntable were analyzed. The modal analysis of the turntable was performed using FEM method. Those analysis results show the 3-axis turntable can simulate the motion of ground vehicles.
Finite Element Analysis and Optimal Design for Mold Shelf of Powder Molding Press
Authors: Liu Jun , Zhou Xiao , Zhou Gang Yi , Dong Xin Long
Published: October 2010

Mold shelf of powder molding press(PMP) is the main load component. Control the deformation of mold shelf is a key problem. In this paper, based on the basic theory of finite element analysis(FEA), the constraints and load conditions of main support parts of mold shelf were simulated and analyzed . ANSYS software optimized the structure of mold shelf. Top width of the stress part increased to 15mm, its height from 80mm down to 50mm. The results showed that the maximum displacement of mold shelf reduced to 0.4740mm, the maximum stress reduced 843.44MPa to 742.38MPa. Load distribution of the mold is more uniform, deformation and displacement also improved. It provides a new method and theoretical basis for optimal design of powder molding shelf.
Dynamic Characteristics Research for Mechanical Timing Mechanism in Ammunition by Simulation
Authors: Song Rong Chang , Zhang Long Fei , Wang Jun Bo , Liu Chuan Qin , Ma Lin Qiang
Published: October 2010

In ammunition systems, clock mechanism was often used as timing mechanism for ammunition fuze in order to make ammunition work again at a time (or distance). Since shells were in a unique centrifugal environment, clock mechanism was of non-energy storage. Centrifugal force of the projectile was used as the driving force for clock mechanism. Timing principle of clock mechanism was studied and analyzed in this paper. Using three-dimensional modeling software as computer-aided design (CAD) platform for a clock mechanism and MSC.ADAMS (rigid body dynamics simulation software) to simulate and analyze the dynamic characteristics of clock mechanism, rotation speed and rotation time was obtained and also the relationship between the rotation speed and rotation time. Simulation results show that the clock mechanism using centrifugal force as driving force has the time characteristics related to the rotation speed and meanwhile, more stable characteristics of distance.
The Research and Implementation of Particle Effects Algorithm in Virtual Environments
Authors: Liu Cheng , Xiao Lei , Qu Xi Long
Published: October 2010

As we know, when using traditional particle system to initiate the natural phenomenon, we need to deal with a lot of computation and data issues, in order solve this problem, we discuses in this chapter to combine the way of particle system and visual particle system, using vertex buffer techniques and texture mapping techniques to design elementary particle systems, which base on Visual C++ as compiler platform. using the Direct3D graphics software library to complete particle system designing ,and it successfully simulated using a small amount of particles in the flame, smoke and other special effects which not only improved the Utilization of System resources ,but also Guaranteed the Verisimilitude and Real-time in the same time.
Fusion Method for True Value Estimation of Manufacturing Quality under Condition of Poor Information (Part I: Theory)
Authors: Xia Xin Tao , Gao Lei Lei , Chen Jian Feng
Published: October 2010

Poor information means incomplete and insufficient information, such as small sample and unknown distribution. For point estimation under the condition of poor information, the statistical methods relied on large samples and known distributions may become ineffective. For this end, a fusion method is proposed. The fusion method develops five methods, three concepts, and one rule. The five methods include the rolling mean method, the membership function method, the maximum membership grade method, the moving bootstrap method, and the arithmetic mean method. The three concepts comprise the solution set on the estimated true value, the fusion series, and the final estimated true value. The rule is the range rule. The method proposed can supply a foundation for the true value estimation of manufacturing quality under the condition of poor information.
Design and Characteristic Analysis for Indexing Mechanism of Rotation Worktable
Authors: Cheng Guang Zhen , Cheng Yuan Bo
Published: October 2010

Aim is designing the indexing rotation worktable, used for machine process indexing rotation. in this paper introduced two kind of working method of rotation worktable, indexing rotation and circle feeding. Particularly discuss structure compose, drive fashion, transmission mechanism ,orientation clamp mechanism, working principle, indexing rotation action course, about swing hydraulic motor indexing mechanism, rack piston hydraulic cylinder indexing mechanism and hydraulic cylinder Geneva wheel indexing mechanism. through analysis and compare, summarize advantage and disadvantage of the three mechanisms, supply reference for designing and selecting indexing mechanism. the new is used hydraulic cylinder Geneva wheel mechanism to indexing rotation worktable.
Influence of Homogenizing Annealing Process on Microstructure and Mechanical Properties of as-Cast Mg-Gd-Y-Zr Magnesium Alloy
Authors: Dong Li Jun , Yang Quan Yi , Huang Xin Yu
Published: October 2010

The effects of homogenizing annealing process on the microstructures and properties of Mg-Gd-Y-Zr magnesium alloy were investigated and the fracture of specimens before and after homogenizing annealing was also analysized by optical microscopy，X-ray diffraction analysis etc．The results show that after homogenizing annealing，dendritic segregation is almost eliminated and the microstructures and properties of alloy are improved. The annealing temperature played a main role in homogenizing of Mg-Gd-Y-Zr alloy. The optimal homogenizing annealing process is at 480°C for 8h．
Numerical Study on Process of Breaking Rock with TBM Cutter in Different Cutting Orders
Authors: Tan Ji Qiu , Tan Qing , Xia Yi Min , Xu Zi Jun , Qu Xi Long
Published: October 2010

In order to research the effect of different cutting orders on breaking mechanism of TBM cutters for the rock without joints, this paper established the simulation models of breaking rock three TBM cutters in simultaneous and sequential orders, which is based on the 2D discrete element method. A series of numerical experiments were designed and the whole process of production and propagation of crack and rock breaking was successfully simulated. The simulation results showed that the cutter order determines the breaking mode, which is carefully analyzed: The chipping stress under the sequential order is higher than simultaneous way. The chips are formed by the side cracks under the two loading modes, while the shape of the rock chip are different. The distribution of the principal stress contour is almost symmetrical in different cutting order. Finally, conclusions and future work are summarized.
Design and Implementation of UDDI Registry Center
Authors: Wang Quan Deng , Qu Xi Long
Published: October 2010

The Key of Web Services lies in how to describe and find Web serve, and which is mainly realized depending on UDDI technology is realized. The company which provided the services by UDDI can register information, it can make the potential user and/or cooperative partner find the services and simple shelf of the business of these companies. At the same time, UDDI can make company find other company, so as to expand the potential business partnership. We can say UDDI has offered the chance for company to step into new market and service, also make the companies in all scales expand their own place business among the global market rapidly.
Design and Implementation of Conference Management System Based on ASP
Authors: Wang Quan Deng , Qu Xi Long
Published: October 2010

With the rapid development of the Internet and information, communication technology, human society began to enter into the intelligence community with the digital and network platform. With the popularization of computer application in schools, enterprises and other institutions, the meetings of governments, enterprises and institutions has broken the traditional model that the meetings are held in the same place and at the same time, and network meetings is to be popularized with the increasingly fast paces. But regardless of the company or the university, there exists the problems of meeting management. Now the overwhelming majority of the conference management is still in a state of manual, inefficient and prone to error, not manageable, not rule out any untrue phenomenon. Therefore, the internal management, self-improvement of the meeting management can not be ignored. This paper aims to resolve this problem by designing a meeting management website.
Conference Management website ASP can be used to design the conference management website, ASP (Active Server Pages) dynamic website is a technology which is introduced by Microsoft Company to replace CGI (Common Gateway Interface)-a common Gateway Interface. By combining the knowledge of ASP HTML language, ASP directives and ActiveX components and Access database, the paper uses the own Web server to create and run a dynamic interactive Website 。The paper aims to realize the work of meeting managing, application, auditing, controlling, minutes of meetings processing through the meeting management website.
Prediction of Pressure Drop of a Wave-Plate Gas-Liquid Separator by CFD
Authors: Luan Yi Gang , Wang Ting , Sun Hai Ou
Published: October 2010

CFD method is used to simulate characteristics of flow field inner a kind of wave-plate gas-liquid separator with drainage channels. The N-S equations closed with standard turbulence model is used. The resistance characteristic of separators with different vane clearances is acquired as function of inlet velocity and the flow fields are simulated numerically. In order to evaluate the simulation method, model experiment is carried on using wind-tunnel to obtain the resistance characteristic under the same operation condition. Good agreement is reached between numerical results and experimental data of pressure drop of the separator. The research can provide theoretic basis for the design and optimization of wave-plate gas-liquid separator in the future.
Investigation of Laser Welding on Vehicle Safety Parts
Authors: Wu Qiang , Tang Yong , Yang Yong Qiang , Li Yu Zhong , Qu X.I.
Published: October 2010

Based on many experiments of CO2 laser welding of high strength two-sided galvanized steel thick with 1.5mm to vehicle body, joint microstructure and stress-strain curves of specimen are acquired. It has inferred theoretically relations among critical power, welding speed and focal point position under given welding technological conditions. With coaxial and side-blown protective gas, craft parameter are optimized, the laser deep melt welding may avoid effectively heat-affected zone (HAZ) softened phenomenon, as well as welded porosity may controlled effectively. The experimental result shows that hardness value in weld zone becomes low with increasing of energy input, at the same time the cracked zone of tensile specimen, the dimple size and the distribution of cross-section in welding seam are also different, tensile crack of welding seam extends to the base metal, which indicates deep penetration laser welding can effectively avoid softening of welding joints during laser welding of high strength galvanized steel.
Heating Current Control in Electric Hot Minipore Drilling Hard-to-Cut Material
Authors: Tang Yong , Wu Qiang , Ye Bang Yan , Hu X.F. , Li Yu Zhong , Qu X.I.
Published: October 2010

The key point for improving efficiency of Electric Hot Machining (EHM) is to keep an optimal heating temperature in cutting process. This paper introduces the principle and system for realizing optimal heating current control, Electric Hot Machining is applied to minipore drill of hard-material, a method of rapid determining the optimal heating current under various cutting conditions in electric hot drilling is proposed based on the conservation law of optimum cutting temperature. For a certain combination of tool and workpiece, the heating current in different cutting conditions can be obtained by changing heating current and measuring the cutting temperature in electric hot drilling.
Research of Installing Small Reactors on Neutral Points of 500 KV Autotransformers and the Analysis of Overvoltage
Authors: Li Yong Jian
Published: October 2010

Because of the extensive application of autotransformer in 500 kV power grid, the value of single-phase short-circuit current is generally greater than that of three-phase short-circuit current, or even greater than the maximum rated through current of the breaker. In order to reduce single-phase short-circuit current and avoid implement of bus split, this paper proposes to install small reactors on neutral points of 500 kV autotransformers. By analyzing and calculating the effect on short-circuit current limitation, the most suitable impedance value of small reactor is proposed. In addition，the overvoltage of the neutral point and insulation coordination are particularly discussed.
Calculating Methods on Remained Measure of Repairing Mold in Green Product Design
Authors: Liu Jun An , Wei Ke Xiang , Qu Xi Long , Tan Li Xin , Tao You Rui
Published: October 2010

This article primarily analyzes the shortcoming in the current formula of plastic and rubber mold shaped dimensions in practical， and fully considered the influence of plastic and rubber contracting fluctuation ratio on the accuracy of the plastic and rubber dimensions. As the introduction of δX sources from mold designers’ estimating error on plastic and rubber contracting ratio or the uncertainty of contracting ratio fluctuation, know that the actual contracting ratio of plastic and rubber fluctuates around the average plastic and rubber contracting ratio. Therefore, the remained measure of repairing mold is the function of plastic and rubber products dimension error δS’ and δS, caused by plastic and rubber contracting ratio estimating error and contracting ratio fluctuation respectively. Based on the probability theory, a comparatively scientific method in calculating the remained measure of repairing mold is proposed. This method exceeds all other Calculating Methods increase design success rate use in Green Product Design.
Fusion Method for True Value Estimation of Manufacturing Quality under Condition of Poor Information (Part II: Experiment)
Authors: Xia Xin Tao , Chen Jian Feng , Gao Lei Lei
Published: October 2010

Based on the fusion method for the true value estimation under the condition of poor information, the experiment is conducted in this paper. The results of simulation of the uniform distribution and experimental investigation on the manufacturing quality evaluation for the tapered roller bearing indicate that the fusion method allows the number of the data little and the distribution unknown, having the reliable estimated result.
The Granulation Technique of Rice Straw and its Mechanical Equipment Design
Authors: Tan Ji Qiu , Liu Jun An , Song Xiao Bo , Dai Ming , Xu Zi Jun
Published: October 2010

As a large agricultural country, rice straw is a kind of inexhaustible and renewable resources in China. Since the rice straw is viscoelastic biological material with low density, it is not conducive to the transport and storage, and it affects the deep processing or secondary development and utilization. Due to the high compression ratio, on the other hand, straw densification briquetteing fuel (SDBF) is great convenience to transport and storage. Simultaneously, it improves the combustion properties of biomass fuels, and increases the efficiency in the use of biomass resources. It has an expansively developing prospects. Accordingly, how to effectively convert the loose rice straw into SDBF is gaining more and more attentions now. In this article, by researching the characteristics of the compressed rice straw fiber, biomass formation mechanism and its influence on shaping factors, the better conditions in processing of rice straw compression molding are concluded. Based on biomass compression molding technology, a kind of flat compression granulating machine was subsequently designed. And then we have designed compressed granulation molding trials on straw with different particle size and different pressures. Experimental results show that the granulation machinery can effectively reduce energy consumption, abrasion of equipment, and raise the productivity.
Research on Indeterminacy Causal Inductive Automatic Reasoning Mechanism
Authors: Liang Kai Jian , Bai Lin Feng , Qu Xi Long
Published: October 2010

The generalized inductive logic causal model that can synthetically process fuzzy indeterminacy and random indeterminacy was proposed in this paper. On this basis, the new logic indeterminacy causal inductive automatic reasoning mechanism based on fuzzy state description was put forward. At the end of this paper its application on the development of intelligent controller was discussed.
Research on Stress-Strain Field and Fatigue Lifetime of the Hot Stamping Die
Authors: Zhang Lei , Zhao Guo Qun , Li Hui Ping
Published: October 2010

In hot stamping process, the die suffers complex thermal mechanical loads. In this paper, the process model and the materials model were set up. And with the example of U-channel forming, a coupled thermal-mechanical analysis is performed with ABAQUS. According to the simulation result, the stress and strain fields of the die show a great uneven distribution in place and time. And the explanation for the non-uniform was given out in this paper. Finally, the fatigue life of the die was evaluated, and the suggestions were proved for optimizing the fatigue lifetime of hot stamping die.
Full Field Response Prediction Technique in Dynamic Design
Authors: Wang Qian Jin , Qu Wen Zhong , Xiao Li
Published: October 2010

Structure vibration test plays an important role in dynamic design, but in most cases the experimental data we get is always limited and insufficient for succeeding upgrade and optimization. The response prediction technique presented in this paper is the corresponding technique to deduce the full field response from the limited data obtained by simple vibration test instead of conducting the full-size test. SEREP (System Equivalent Reduction-Expansion Process) method was used to conduct the prediction research and the procedure was elaborated in detail theoretically first, then several simulations were carried on to demonstrate the prediction procedure, inspect the accuracy under various loads and investigate the factors which may influence the accuracy including the number of modes used in the prediction, the noise, and the measured points. Results show that this method has excellent accuracy and good adaptability to various loads as long as a sufficient set of orthogonal mode shapes participate in the prediction procedure.
Effect of Transition Curve on Gear Bending Strength
Authors: Wang Li Ping , Xu Ying Qiang , Wang Lei Lei , Zhang Qiong Wei
Published: October 2010

Transition curve is very important to bending strength and life of gear. In order to improve the bending strength of gear, the shape of three kinds of transition curve (ordinary fillet cutter tip, single circle arc cutter tip and double circle arc cutter tip) was analyzed respectively, the relationship of double circle arc cutter tip parameters was established, the relation model of sensitive part of gear and stress concentration factor ( J and γ) was determined, the effect of different transition curves of gear on bending strength ( ) was explored. The results of analysis show that the bending strength of gear cut by double circle arc cutter tip increases by 10% comparing with that of gear cut by ordinary fillet cutter tip. It provides theories foundation for the design of high bending strength gear.
Research on Dynamic Disturbances Induced Catastrophic Failure of Deep Rock Mass Based on Synergetics
Authors: Shao Peng , Wu Yu Qi , Yang D.B. , Ren G.X. , Fan Z.Y.
Published: October 2010

Catastrophic failure of rock mass is a kind of serious geological hazard which usually happens during deep mining excavation and underground engineering construction. Though many investigations have confirmed that it was strongly relate to dynamic disturbances, the disturbing mechanism is still not well-known. The purpose of this paper is to offer a theoretical method to analyze dynamic disturbances induced catastrophic failure. On the basis of synergetic analysis, we established a generalized Langevin equation to describe the nonlinear evolution process of rock mass by considering stochastic dynamic disturbances. Then we further derived a stochastic potential function to research the inductive effect of dynamic disturbances and critical property of catastrophic failure. Results indicate that the influence of dynamic disturbances on the stability of rock mass depends on both the static state of rock mass and the external disturbance intensity. The catastrophic failure threshold is the function of disturbance intensity and control parameters of rock mass.