bluuebunny/crossref_metadata_2025 huggingface dataset:
Milling Parameter Optimization Based on Control of Aluminum Alloy 7475 Surface Roughness
Authors: Lin Ai Qin , Zheng Min Li
Published: February 2012

Aiming at the problems that diversity and blindness of milling parameter selection, propose a milling parameter optimization method that based on control of surface roughness by coupling neural network and annealing genetic hybrid algorithm. This method makes advantages of experimental design technique, neural network and annealing genetic hybrid algorithm. High speed milling of aluminum alloy 7475 surface roughness experiments were designed based on uniform experimental design scheme. A neural network predictive model for surface roughness was created using experimental data. The predictive model and analytical definition of material remove rate had consisted of optimization problem. It was used annealing genetic hybrid algorithm to optimize model. Proved by test ,the results show that the optimal parameter can improve surface quality. This indicates that the method can accurately milling parameter optimize.
Polytomous Item Relational Structure Theory Based on Empirical Distribution Critical Value
Authors: Liu Hsiang Chuan , Chen Wei Sung , Tsai Hsien Chang
Published: February 2012

The threshold limit value of Takeya’s item relational structure theory is a fixed value, which is lacking of statistical meaning, in our previous paper, an improved threshold limit value by using the empirical distribution critical value was proposed, it was showed that the new theory is more sensitive and effective than the old one. However, for constructing the item relational structure, both of them can only be used for dichotomous items, not for polytomous items. In this paper, the empirical distribution critical value based polytomous item relational structure theory is proposed, it is a generalization of our previously improved theory. A calculus example was also provided in this paper to illustrate the advantages of the proposed method.
Animation Tree in the Wind
Authors: Liu Xu Min , Zhai Xu
Published: February 2012

Real time modeling and rendering of natural Phenomena has been a hotspot and One of the most difficult tasks in Computer Graphics, it has been found wide application in many domains such as computer animation, computer games, special effects of movie, landscaping, battlefield simulation and virtual reality etc.. Realistic simulation is generally consisting of natural elements simulation and man-made elements simulation, natural elements simulation is relatively complicated. However, in natural elements simulation trees simulation is one of the most complex technologies. In this paper, propose a method that is real-time visualization of animated trees in the wind. Compared with other previous studies, our work is to develop a physical model of real movement by the trees swaying animation. We describe the method is consistent with nature scene that branches move in the wind. Then, we describe a simple animation of trees swaying, in the local graphics processor.
Site Preference and Elastic Properties of 5d Transition Metals in Ductility YAg Alloys
Authors: Wu Yu Rong , Hu Wang Yu , Xu Long Shan
Published: February 2012

First-principles supercell calculations, which are based on density functional theory, were performed to study the site preference behavior and elastic properties of 5d (Hf-Au) transition-metal elements in B2 ductility YAg alloy. It is found that all alloying elements Hf, Ta, W, Re, Os, Ir, Pt and Au occupy the Y sub-lattice. Micro-alloying transition metals W, Re, Os, Ir and Pt decrease the lattice parameters of Y8Ag8 except Hf, Ta and Au, among which Y8Ag7Hf shows the largest variance. Furthermore, the calculated elastic constants show that Hf, Ta, W, Re, Os, Pt and Au improve the ductility of YAg alloy, and Y8Ag7Hf presents the most ductility among these alloy, while Ir transforms ductile into brittle for YAg alloy. In addition, Os alloying element increases the hardness of YAg alloy.
Finite Element Analysis of Mandible Reconstruction Plate in the Case of Symphysis Fracture
Authors: Valášek Jiří , Řehák Kamil , Krpalek David , Ebringerová Veronika , Florian Zdeněk
Published: February 2012

The presented work is focused on stress - strain analysis of a reconstruction plate. For this problem the computational modelling was chosen with using finite element method. Mandible was created based on the methods of Reverse Engineering and CT images. Using these methods a STL model of mandible with cortical and cancellous bone tissue was created. A volume model of lower jaw with applied reconstruction plate was created in CAD software. A Symphysis fracture of lower jaw was modeled in calculation program ANSYS. The cancellous bone tissue is modeled with different mechanical properties, which corresponds to the varying quality of this tissue. In this work an influence of varying quality of cancellous bone tissue to von Mises stress is observed.
Optimization of HAVC System with the Utilization of Geothermal Water System by Using High-Temperature Heat Pump and Fan-Coil
Authors: Wang Jian Qiang , Kai Han
Published: February 2012

In view of the HVAC and fan-coil system utilizing geothermal water whose temperature range is from 60°C to 85°C,the objective function of system has been established. The temperature parameters of all levels and the optimum recharge temperature of geothermal water are obtained by using MATLAB software. At the end of the paper, supply-water temperature of load side influencing on the price and coefficient of performance of high temperature heat pump have been analyzed in theory.
A Study of Paddy Heating for Insect Elimination and Improving Milled Rice Quality
Authors: Ramatchima Pradit , Sudajan Somposh , Junsiri Chaiyan , Thivavarnvongs Thavachai
Published: February 2012

This research was aimed at studying the effects of heating the paddy for insect killing and thereby improving subsequently milled rice quality. The experimental temperatures were in the range of 120-200°C, the paddy feeding rates were 60, 120, and 180 kg/h and the heights of the vibration screen were 5, 6, and 8 mm. The findings indicated that when the feeding rates increased between 120 and 180 kg/h, the insect death rate increased for nearly all temperature levels, whereas the feeding rate of 60 kg/h and the vibration screen height of 6 mm were found to give 100% insect killing efficiency. The resulting head rice yield increased by 0.3-0.7% for a screen height of 8 mm. The quantity of broken rice decreased whereas the total rice quantity did not vary significantly; the milled rice had a whiteness index slightly increased when compared to the reference rice.
Microstructure and Electrochemical Properties of La0.35Ce0.65Ni3.8-XCo0.8MnxAl0.4 Hydrogen Storage Alloys
Authors: Liu Bao Zhong , Hu Meng Juan , Fan Yan Ping , Li An Ming
Published: February 2012

Microstructure and electrochemical characteristics of La0.35Ce0.65Ni3.8-xCo0.8MnxAl0.4 alloys have been investigated. X-ray diffraction results indicate that the alloys consist of a single phase with CaCu5-type structure, and the lattice parameters a, c and cell volume V increase with increasing x value. The maximum discharge capacity of the alloy electrodes first increases from 217.9 (x = 0) to 290.1 mAh/g (x = 0.3), and then decreases to 271.3 mAh/g (x = 0.5). The high-rate dischargeability at the discharge current density of 1200 mA/g first increases from 58.4% (x = 0) to 78.2% (x = 0.3), and then decreases to 75.2% (x = 0.5). Both the charge-transfer reaction at the electrode/electrolyte interface and the hydrogen diffusion in the bulky alloys are responsible for the high-rate dischargeability. Cycling stability first increases with increasing x from 0 to 0.3 and then decreases when x increases to 0.5.
Analysis on Evaluation Method of Macroeconomic Situation
Authors: Jia Tian Yi , Xiao Da Qiang
Published: February 2012

Periodic economic fluctuation has become a common phenomenon in contemporary society, which is inevitable in both state-controlled economy countries and market economy countries. Since more and more countries realize the importance of keeping fingers on the pulse of the trend of macroeconomic situation, a variety of macroeconomic evaluation methods and indexes ,such as CPI，PPI and GDP are developed to describe and predict the regulate operation of the macro-economy. Nevertheless, those indexes have such many criteria due to different emphases that they even form an enormous and yet complex system. Consequently, efficient and effective research methods still remain unsettled. This conceptual paper puts forward a new research method---cluster composite index evaluation method, which can directly and accurately reflect the operation of macro-economy. Two case analyses of applying this method in macro-economy corroborate the method to be scientific and accurate.
Theoretical Analysis and Finite Element Simulation of Autofrettage for Extrusion Die
Authors: Zhao Ya Li , Liu Quan Kun , Qian Ling Yun
Published: February 2012

The design of extrusion die has been investigated by autofrettage technique considering the characteristics of the extrusion die. Ideal elastoplastic autofrettage model was established and the stress formulae of three loading procedures were derived and the theoretical calculation method of the maximum autofrettage pressure and working load was put forward. The simulations of stress distribution and the inwall displacement of the autofrettaged extrusion die were performed using MARC finite element software, and the results coincided well with the theoretical derivations. It was observed that the autofrettaged extrusion die can raise the elastic loading capacity under the inner displacement limit , without the appearance of reverse yielding and reyielding under the working load. The results show that the autofrettage technique is appropriate for the design of extrusion die.
Study on Preventive Low Temperature Corrosion for Plate Heat Exchanger with Dual-Plate Structure
Authors: Guo Zhi Ping , Yang Zhi Dan , Yang Jin Zhong , Li Dong Wei , Li Bao Zong
Published: February 2012

Different from the traditional method of preventing low temperature corrosion, heat exchanger with dual-plate structure change structure of plate heat exchanger and can decrease the temperature of hot gas in the outlet while increasing wall temperature to achieve the purpose of preventing low temperature corrosion.
Simulation for Hydrogen Absorption on Single Wall Carbon Nanotubes Using the First Principle
Authors: Chen A Qing , Shao Qing Yi , Wang Li
Published: February 2012

The hydrogen storage on single wall carbon is studied by using the first principle based on density functional theory (DFT). It concludes that the adsorption of hydrogen on the bare distorted single carbon nanotubes (SWNTs) can be enhanced dramatically when the single wall carbon nanotubes are rotated along the tubs axis. On the other hand, it suggests that the hydrogen storage capacity of SWNTs depend on the deformation angles.
Structure and Electrochemical Properties of Spherical 0.3Li2MnO3•0.7Li(Ni1/3Co1/3Mn1/3)O2 Cathode Materials
Authors: Fan Guang Xin , Dai Shu Pu , Li Hui Lian , Zhang Chuan Xiang , Xu Yong Jun , Yin Zheng Zhong , Chang Zhao Rong
Published: February 2012

Spherical 0.3LiMn2O3•0.7Li(Ni1/3Co1/3Mn1/3)O2 cathode was synthesized by co-precipitation method followed by calcining at various temperatures (700-950 oC). The structures of the samples were investigated by XRD, SEM, BET and electrochemical method. The results showed that the cathode prepared at 700 oC had the highest discharge capacity of 220.8 mAhg-1 and a satisfactory cycling performance in this study. After 25 cycles, its discharge capacity was still retained as high as 199.6 mAhg-1, which is benefited from the special sphercial microsturcture.
Laboratory Studies on Bearing Capacity of Strip Interfering Shallow Foundations Supported by Geogrid-Reinforced Sand
Authors: Marandi S. M , Javdanian H
Published: February 2012

Abstract: In recent years, geosynthetics are used and considered by many scientists for various earth structures. This is due to their good performance and ease of execution. Many researchers carried out extensive studies on the behavior properties of geosynthetics. However, much attention has not been given to detailed studies and investigation on bearing capacity of interfering shallow-foundations supported by geogrid reinforced sand. In this research, a series of experimental tests was carried out on the effects of geometrical parameters on bearing capacity of interfering shallow foundations supported by geogrid reinforced sand. A numerical model and design charts were introduced to predict bearing capacity. The results showed that the bearing capacity increased using geogrid reinforcement and a good correlation exists between the model and the conventional theoretical relations. Also, the main parameters affecting on the values of the interference factor were the footing distance (s/B) and the number of reinforcement layers (N). However, the suggested interference factor model had an effective reflection on the calculated bearing capacities of the footings.
Studies on the Anatomical Structure of Fast-Growing Toona ciliate
Authors: Sun Jin , Wang Xiao Bo , Wang Xiao Jing , Lin Yan , Gao Zhen Zhong
Published: February 2012

In this paper, anatomical characters and tissue proportion of fast-growing Toona ciliata samples from Guangzhou was investigated assisted with the light microscope and image analysis system based on the principle of stereology. Qualitative and quantitative data were presented for purposes of identification. Results showed that fast growing T. ciliata was coarse texture with wide growth ring of 3~5cm.The ray proportion was 12.12%-25.56%, the mean value was 17.98%, increasing with time-dependent relevance. The vessel-elements proportion was 6.37%-10.00%, the mean value was 7.40%, increasing then declining and finally increasing. The fiber and other tissue proportion was 67.06%-79.92%, the mean value was 74.62%, declining by year.
Computer-Assisted to Personalized Excision of Bone Tumor and Precise Bone Reconstruction
Authors: Ding Huan Wen , Tu Qiang , Wang Hong , Zeng Suo Lin , Liu Bao , Shen Jian Jian , Yi Can , Wang Ying Jun , Yin Qing Shui
Published: February 2012

Computed tomography is used in 13 clinic cases with bone malignant tumor to get 2-dimensional data of diseased area. Reconstruction of 3- dimensional anatomical model, excision range of bone, designing of individual surgical template and bone prosthesis was accomplished preoperatively by computers. Based on computer-assisted-design (CAD) proposal, we cut the tumor accurately, and use allografts bone with personalized prosthesis to reconstruct the bone defect after tumor excision. It is concluded that we can design excision range of bone easily, cut them accurately, reconstruct bone defect of diseased area precisely with the CAD technology.
Study on Modeling and Simulation of Wire Vibration in WEDM
Authors: Li Chao Jiang , Guo Yong Feng , Bai Ji Cheng , Lu Ze Sheng , Chen Chuan
Published: February 2012

The wire electrical discharge machining (WEDM) has been widely used in the field of metal cutting, mold industry, aerospace and so on. However, in the discharge machining, it is very important to restrain the wire-tool vibration for the improvement of machining accuracy. In this paper, it is created a model of the wire vibration with double-ended fixed, established the differential equation of vibration, and derived its full theoretical solution to analysis the vibration factors. Simulations of the wire vibration with ANSYS Transient dynamics analysis were given. An orthogonal design of the wire vibration using L9 orthogonal table was made, and the experiment found that minimize the servo voltage, reduce the pulse width, and select the appropriate wire tension and pulse interval, which can reduce the wire vibration.
Weaving Process Scheduling Method Based on Ant Colony Algorithm
Authors: Yang Hua Lin , Wang Hai Ran
Published: February 2012

In order to improve the weaving workshop productivity in textile industry, ant colony algorithm is used to solve knitting process scheduling problem. A model of ant colony algorithm for complex working conditions such as multi-product, multi-delivery, emergency orders coming which often occurs in the enterprise is established. Examples show that the method can effectively deal with complex conditions with good results. The modified Ant colony algorithm is feasible in the Knitting Process scheduling problem in the textile weaving industry.
Optimization of Cutting/Tool Parameters for Dry High-Speed Spiral Bevel and Hypoid Gear Cutting with Cutting Simulation Experiment
Authors: Liu Gan Hua , Yan Hong Zhi , Zhang Jun Jie
Published: February 2012

Tool life and the rationality of cutting parameter setting are evaluated directly by cutting force. In order to predict cutting force, and then to optimize the tooth cutting condition for dry high-speed spiral bevel and hypoid gear cutting, this study has established a 2D cutting FEM simulation platform by using DEFORM-2D based on the 2D orthogonal slot milling experiment. Through the platform, using the method of combining single-factor experiment and multi-factor orthogonal experiment, this study has explored the influence of cutting/tool parameters on cutting force in the dry high-speed cutting process of 20CrMnTi spiral bevel and hypoid gear (face hobbing dry cutting process). The results show that from high degree to low degree, the influence of each parameter on cutting force is as follows: feed > cutting speed > relief angle(P.A.side) >blade rake angle, and the influence of the first three parameters is significant, the influence of blade rake angle is not significant; the optimized condition for dry high-speed spiral bevel and hypoid gear cutting is suggested to be: the cutting speed is 300 m/mim, the feed is 0.06 mm/r, the blade rake angle is 14° and the relief angle(P.A.side) is 10°; the cutting edge can be honed moderately, but the hone radius is not bigger than 0.1 mm.
Study on the Parallel Modeling of Spatial Parallel Manipulator
Authors: Liu Wen Jun , Luo Yu Feng , Fu Mei Tao
Published: February 2012

The modeling approach of spatial parallel manipulator has been extensively studied based on the SOC theory in this paper. According to the characteristics of the parallel robot mechanism’s , ideas and general methods of spatial parallel manipulator modeling in parallel has been proposed and typical spatial mechanism’s modeling has been performed. Study shows that the parallel modeling approach can dramatically increase the modeling and solving efficiency for parallel manipulators.
Modeling and Analysis of Manufacturing Variables in the Transesterification Process for Refined Biodiesel Fuels
Authors: Chung Tsair Wang , Chen Yi Jen , Liu Kuan Ting
Published: February 2012

In this study, the factorial design and response surface methodology (RSM) was used to find the influence of manufacturing variables on the transesterification of plant oil into fatty acid methyl ester (i.e. biodiesel fuel) and to observe the variation of the degree of effect for each variable in the transesterification process with refined procedure. A second-order model was obtained to predict the viscosity and the yield of biodiesel fuel as a function of the reaction time, the mass fraction of catalyst in methanol and the molar ratio of methanol to plant oil. The experimental data of the yield and the viscosity of refined biodiesel fuels in different manufacturing variables are discussed in this study. Analysis of variance (ANOVA) was also applied to discuss the main factor and interaction factor effects of the manufacturing variables on the responses of the yield of biodiesel fuels. As shown in this study, the amount of catalyst affects the viscosity and the yield of biodiesel fuels. The yield of methyl ester is proportional to the amounts of methanol in the reaction. The factor of reaction time affects the viscosity and the yield of the biodiesel fuel slightly.
Double Scale Coupling Model of Plastic Injection Molding
Authors: Shang Guan Lin Jian , Yang Yang , Yang Jie
Published: February 2012

The process of short fiber reinforced injection molding is a typical multi-scale problem, it has become a cutting-edge issue of the field of polymer molding to study clearly the mesoscopic structure changing rules in the whole molding processing. Aiming at the processing of glass fiber reinforced polypropylene injection, basing on the foundation of macro continuum medium model, approximated short fiber reinforced injection molding process as macro-mesoscopic double scale problem composed by macro-flow and small-scale short fiber movement, establish the double scale model, which couple Mesoscopic fiber orientation. And the cooling crystallization model was established by learning from multi-scale simulation of liquid metal crystallization method.
Studies on the Growing Characteristics of Synthesized Diamond in the System of FeNi-Ti
Authors: Liu Yan Feng , Zheng You Jin , Huang Hai Liang , Fu Dong Hui , Wang Dan
Published: February 2012

Synthesis of Ⅱa industrial diamond with high quality at high temperature and high pressure (HTHP) was examined in this paper and Ⅱa industrial diamonds were synthesized successfully. The experimental results show that the lowest synthesis pressure of diamond changed significantly which goes down firstly, and then up with the increasing of Ti content. It is discovered by optical microscopy that the color of synthesizing diamond in nitrogen getter system is lighter than that in raw catalyst power system and most crystals are hexahedrons & octahedrons. The experiment results measured by IR analysis shows that nitrogen content in synthesizing diamond in nitrogen getter system is significantly lower than that in the raw catalyst power system. Surface morphology of diamond synthesized in two different systems is investigated by the aid of SEM.
The Error Estimation for 5-Axis Spindle-Rotating CNC Machine Tool
Authors: Yu Yang , Liu Ping
Published: February 2012

5-axis CNC machine is be the best tools in sculptured surfaces machining. Current CAM algorithms for 5-axis machining only consider the surfaces' geometric information when generating cutter contact points (CC points). Hence, the step length, which is the distance between two CC points, is determined only by the surface parameters for current CAM system. Because of the cutting tool can rotate, the actual cut trajectory is no longer a straight line between two consecutive CC points for 5-axis machining. Thus the cut error and the maximum step length should depend on the structural of 5-axis CNC machines tool and the surface's geometry. This paper proposed a new algorithm to estimate the maximum step length based on the cut error of 5-axis machining, and the result shows that this estimation algorithm provides better than traditional algorithms.
In Situ FT-IR Studies on the Amine-Catalyzed Urethane Reaction Kinetics of 1,3-Butanediol
Authors: Yang Peng Fei
Published: February 2012

Phenyl isocyanate is used to react with 1,3-butanediol at different temperatures. Toluene is used as solvent and 1,4-diazabicyclo[2,2,2]octane is used as catalyst. In-situ FT-IR is used to monitor the reaction to work out rate constant, Arrhenius equation and Eyring equation. The urethane reaction has been found to be a second order reaction, and the rate constant seems different between initial stage and final stage. The activation energy (Ea), activation enthalpy (ΔH) and activation entropy (ΔS) for the urethane reaction of primary hydroxyl group are calculated out, which are 26.4 kJ•mol-1, 23.6 kJ•mol-1and -186.6 J•mol-1•k-1, respectively. They are very useful to reveal the reaction mechanism.
Fault Detection of a High-Speed Electric Spindle
Authors: Zhang Jin Xin , Wang Min , Zan Tao , Nan Jing Yang
Published: February 2012

The high-speed electric spindle is the key part of the machining center which performing high speed precision machining. In order to ensure the electric spindle running under the smooth and steady state, it is necessary to prevent and discover the abnormities during the running process of the electric spindle by the experimental test and analysis. In this paper, the vibration order analysis method combined with the experimental modal test is utilized to measure and diagnose the abnormities of a high speed electric spindle.
Framework of Saving and Intensive Land Use System in Chongqing: A View of Urban-Rural Integration
Authors: Zheng Cai Gui , Yuan Dao Xian , Yang Qing Yuan , Zhang Xiao Cheng , Li Shi Chuan
Published: February 2012

This paper, based on the current state and problems of saving and intensive land use system of urban-rural integration in Chongqing, in which methods of theoretical approach and system analysis are applied, brings up three mechanisms as: (1) the connecting of the increase of urban construction and the decrease of rural residential area; (2) the connecting of sprawling and farmland consolidation; (3) the connecting of intensive land-use in urban-rural area. At last, the paper builds up the saving and intensive land use system of urban-rural integration follow as: (1) perfecting land surveying system; (2) strengthening land statistics system; (3) perfecting land evaluation system; (4) clearing land property right system; (5) improving land registration system; (6) refining land use system; (7) building land tax system; (8) explicating land consolidation system.
AOI Multi-Core Parallel System for TFT-LCD Defect Detection
Authors: Li Hua Zhong , Liang Yong Sheng , He Tao , Li Yi
Published: February 2012

The present Automatic Optical Inspection (AOI) technology can hardly satisfy online inspection requirements for large-scale high-speed, high-precision and high-sensitivity TFT-LCD. First, through studying the working principle of TFT-LCD Defect AOI System, the system architecture for mixed-parallel multi-core computer cluster is proposed to satisfy design requirements. Second, the study focuses on the software framework of AOI system and related key software technology. Finally, the fusion programming model for parallel image processing and its implementation strategy is proposed based on OpenMP, MPI, OpenCV, and Intel Integrated Performance Primitives (IPP).
Research on the Roughness Model of Aspheric Surface with Parallel Grinding Method
Authors: Li L.J , Bai W.T , Sun W , Zhang Fei Hu
Published: February 2012

This paper deals with the roughness forming mechanics of aspheric surface, and based on the subsequent abrasive blade theory, which will form the final ground surface, the mathematical model of maximal valley height of ground surface during aspheric parallel grinding was established. Through simulation study, the influences of grain size, the speed of wheel and workpieces on the aspheric surface roughness were analyzed, and furthermore, through test, the proportional relation between the maximal valley height and the roughness was found.
Application of Offline Programming in CMM Automatic Measurement
Authors: He Wei , He Yan Hui
Published: February 2012

Offline programming can generate programs with optimized structures and clear layers, realizing parametric programming. It is able to achieve almost all kinds of measurement objects. Subroutine can be used for improving programming efficiency. This paper introduces the application of offline programming through instances.
Research on Micro EDM Machine Tool for Machining Micro Array Holes
Authors: Zhu Guo Zheng , Bai Ji Cheng , Guo Yong Feng , Hou Peng Ju , Li Chao Jiang
Published: February 2012

As demands for the micro array holes in modern industry and the characteristics of micro Electrical Discharge Machining (micro EDM), a new type micro EDM machine tool used to machine micro array holes was designed and manufactured. The machine tool contains following systems: the mechanism system, the control system, the pulse generator system and other auxiliary systems. Each system was studied respectively. Base on a large number of experiments, finally, a sample with 256 array holes was processed by the machine tool. The diameter of single hole is 45µm and precision of the holes is ±1µm. The sample has been successfully applied to R & D test of micro nozzle components
Hydraulic Pressure Control System Simulation and Performance Test of Lower Extremity Exoskeleton
Authors: Li Xing Xing , Guo Qing , Zhang Lu Lu , Zhou Hong , Zhang Xiang Gang
Published: February 2012

On basis of the introduction for the composition of carried-load assistance system and the control mechanism of hydraulic pressure valve for lower extremity exoskeleton, the position control loop is built. The control system is designed by frequency domain method using the PID parameters combined with lead correction network. Simulation results show that the control method can servo the angle of knee joint as human’s natural walk as well as the harmonious of man-machine moment. According to performance test of hydraulic pressure control system, the flow and pressure in piston is analyzed considering different load, the pressure of oil box and movable mode. Test results show that hydraulic pressure valve control system can realize efficiently slow walk carried 30 kilogram load, up and down stairs.
The Research of the Athletic Relationship between Knee and Ankle Based on Back-Propagation Network
Authors: Qu Xiao Na , Zhang Teng Yu , Wang Xi Tai
Published: February 2012

Abstract Objective To analyze the relationship between knee and ankle, and provide the design of the intelligent prostheses with the theory foundation. Method The gait of 30 healthy young people walking at fast, normal, and low speeds separately were detected by 3D gait analysis sysytem, and the gait data were investigated through BP Network. Result The kinematic information of the ankle could get from the knee through BP Network which could study the relationship well. Conclusion The control strategy could be used on the intelligent prostheses according that the kinematic information of the ankle could be forecasted from the knee.
Study on Product Family Architecture Dynamic Evolution Based on Product Instances
Authors: Shao Wei Ping , Hao Yong Ping , Zeng Peng Fei
Published: February 2012

Product family architecture (PFA) need to keep the dynamic evolution, in order to meet the changing needs of customers and effectively support the mass customization. This paper puts forward the theory of PFA dynamic evolution based on structure semantic unit. The variation of PFA is mainly caused by the changes in component. In the process of evolution, some components of the architecture need to be removed, replaced or added. For this purpose, the concepts of structure semantic and structure semantic unit were proposed. The structure semantic unit is the combination of assembly relationship, assembly constraint, and geometric information of related dimension and the model of components. The corresponding operations (remove, replace or add) of component is ascertained by consumption analysis of part and similarity calculation between structure semantic units.
The Preparation and the Research on Self-Cleaning Coating
Authors: Ma Ying , Lang Feng Jun , Huang Xian Qiu , Liu Jian Rong , Peng Jing Wen
Published: February 2012

Use the method of graft copolymerization to prepare a perfluorinated coating with low surface energy. It is combined with glass surface by chemical bond. The coating surface has the Nanoscale roughness of hydrophilic and oleophobic characteristics. Oil droplets are placed on the perfluorinated coating surface followed by water, and removed from the surface with water. So, the perfluorinated coating surface has the properties of self-cleaning
Methodology for Calculating Energy Consumption of a Machining Process
Authors: Lv Jing Xiang , Tang Ren Zhong , Jia Shun
Published: February 2012

Due to significant environmental impact and constantly rising prices, energy consumption gets more and more attention by governments and companies. Understanding and calculating the total energy requirements as well as detailed energy breakdown of a machining process are essential tasks as machining is responsible for a large amount of energy consumption in manufacturing industry. The aim of the work reported in this paper is to develop a methodology to estimate and analyze energy consumption of a machining process. This methodology is based on the representation of a machining process as a series of activities. The energy consumption of activities is calculated combined with the energy behavior of machine tool components, and formulas for calculating total as well as detailed breakdown of energy consumption for a machining process are given. The application of the methodology is demonstrated on the turning of a simple shaft.
The UWB Signals of Power Spectral Density
Authors: Xu Hui Bin , Zhang Kui
Published: February 2012

System or the waveform is energy, or has the power value. Generally, periodic signal and random signal is power signal,while the determine nonperiodic signal is energy signal. For the energy signal,we can use the energy spectrum density to describe the signal on the energy unit bandwidth,the unit is the joule/Hertz.For the power signal,we can use the power spectral density to describe the signal on the energy unit bandwidth,the unit for w/Hertz.
Mechanical Design for Enhancing Anti-Impact Capability of Dispersing Information Detecting Robot
Authors: Zhang Lian Cun , Huang Qiang , Gao Jun Yao , Wu Li Ying , Zhang Wei Min , Li Yue
Published: February 2012

Dispersing information detecting robots are very suitable for initiative reconnaissance and surveillance in important targets of sensitive areas. However, the dispersing deployment mode of the robot demands excellent anti-impact property. To solve the problem above-mentioned, the design for enhancing anti-impact capability of a kind of dispersing information detecting robot was presented in the paper. Moreover, anti-impact experiments showed that the robot has excellent capability of anti-impact. At last, the experiments also showed that the design of the dispersing information detecting robot is reliable and practical.
Research on Workflow Model with Component Based on XPDL
Authors: Liu Lei , Li Ren Wang
Published: February 2012

At the moment, the flexibility of the workflow definition language is not enough, various products lack operation quality between each other, and the compatibility is bad. Aiming at this situation, this thesis defines one kind of workflow model with component based on XPDL, which causes pattern description and process definition to be simply, and enables the separation between process definition and performing to become possible, so that it can truly realize the universal process definition, communication and interpretation.
Thermal Analysis on Machine Tools and Research on Time Parameters of Machine Thermal Equilibrium
Authors: Zhang Wen Qiao , Liu Guo , Li Jiang Bo , Mao Xin Yong , Zhang Hui , Tan Bo , Li Hai Zhou
Published: February 2012

Machine thermal equilibrium seriously influences the machining accuracy,a significant amount of research has been dedicated to the task of achieving and reasonablely controlling the thermal equilibrium time.In this paper,based on the analysis of the trait of thermal equilibrium process of machine tool ,the affection of room temperature and spindle speed on this process and the temperature when each point reaches to the heat balance is investigated.A new method of estimating thermal equilibrium time of each measured points based on spindle thermal model theory and multivariate optimization is presented,the results are analysed,further research about the control of machine thermal equilibrium process can be made based on this paper.
Study on Reconstruction for Turbine Blade Surface Using NURBS
Authors: Yue Ying
Published: February 2012

To constructed turbine blade efficiently and accurately, NURBS is adopted to fit the turbine blade surface. The cross section and longitudinal node vectors are computed using the centripetal parameter method and the accumulation chord length parameter method separately. The accurate mathematics model of blade is built with non-uniform rational B-spline based on control points and node vector. The matrix expression is also given. The example shows the blade mathematics model satisfies the accuracy requirement completely. It has the practical application value to enhance the blade design quality and carry on the blade dynamic analysis.
Assistant Decision Modal of Rapid Product Quoting for Mass Customization
Authors: Bao Zhi Yan , Shi Gao Ping , Cui Liang Ping
Published: February 2012

A rapid product quoting model for Mass Customization was proposed. The case library of product quoting was established which include cases of the past year .Each customization parameter was assigned the corresponding weight based on AHP. Weighted similarity was applied to calculate the similarity between historical instance and the customization product, and the similar case group of the customization product was established. The assistant decision chart of cost estimation was drawn by adopting Exponential smoothing，and the key quotation point calculated. The detailed implementation procedures were given. The proposed methodology demonstrates the effectiveness in an instance of bridge crane quoting.
Research Review of Relationship between TQM and Organization Innovation
Authors: Wang Xin Ping , Liu Zi Han
Published: February 2012

So far, there isn’t more general research review of relationship about TQM and organization innovation. This article summarizes literatures of TQM and its elements, organization innovation and its influence factors and their relationship. It aims at offering reference for the future relevant study, and combines the current research status, points out the future research direction.
Positioning Error Compensation for Machining Center Based on Spline Interpolation
Authors: Li Peng , Hu Ying , Ma Zi
Published: February 2012

Related to the machining precision, especially for the middle and low end machining center, the positioning error is often considered as a major factor, which can be traditionally decreased by the pitch compensation function integrated in the CNC system. However, the function is just founded on that all of positioning errors remain constant in the machining process, and it is difficulty to meet the compensation needs in different machining condition. At the same time, it involves a mass of parameters that need professional manual correction. Therefore, the software error compensation method is put forward. Firstly, based on cubic spline interpolation, the error compensation model is designed through the processing of positioning error which is collected by the laser interferometer. Secondly, with the characteristics of G codes, the database is established for error compensation, which can effectively correct different machining G codes with enough error information. Finally, by the experiment and accuracy evaluation, results show that after the positioning error of machining center is compensated by the presented scheme, its precision is improved obviously.
Differential Roll-Scanning Technology for Accuracy Measurement of Fine-Pitch Gears
Authors: Xie Hua Kun , Fu Ying , Feng Gang
Published: February 2012

The accuracy measurement of fine-pitch gears within module 0.02-0.2mm in batch production is one of the puzzle problems in industry because of its small amout of dimension and rigidity. Based on the gear integrated error measurement technology developed by CTRI in China and Frenco in Germany, a kind of differential roll-scanning measuring technology and a differential fine-pitch gear integrated error measuring machine first developed by the authors are introduced briefly in the paper, including the working principle and calculation formulas of ‘two synchronized rotate-driving systems, one differential-compensation closed-loop measurement’ , the stucture of ‘spindle on spindle’ and ‘differential composite driving spindle system’ of the master gear, and the unique master gear with ‘every other tooth thinned’ followed the principle of overlap coefficient not bigger than 1 for a few certain gear pairs，and also the special made hob for making the thinned master gear. The measuring results of four items of deviations, including pitch, profile, tangential composite and integrated deviations of product fine-pitch gears show the feasibility and prospect of the new developed measuring technology and machine in future industry application.
Study of Table Tennis Training System
Authors: Pan Li Ai , Cheng Xian Chun , Du Qiu Lei
Published: February 2012

Table Tennis is a sport that everyone likes. But In today's treat time as gold, it is not easy to want to find a time to accompany a beginner; secondly, more and more the people want their table tennis technology higher, but they have no rivals. On this basis, in order to really make the table tennis training completely out of accompanying training, in this paper, the training machine and training system of table tennis have been studied.
A New Type of Semiconductor Laser Power Supply
Authors: Yue Yu Bo , Yang Xu , Rui Li
Published: February 2012

In this paper development a new Semiconductor laser power supply,for the rising Technology of Semiconductor laser that used in laser beam riding guidance.it contains over current protection and over voltage protection Circuit,with the advantage of small,light,precise,reliable and high efficiency. SettingStructure model on the base of System control theory,using matlab for simulation,and Given the experimental conclusion
Efficiency Evaluation of Resources Value Flow Based on Circular Economy for Coal-Fired Power Plant
Authors: Xie Zhi Ming , Lan Guo Hui , Yi Xuan
Published: February 2012

This paper applies extension comprehensive evaluation method to evaluate resources value flow (RVF) efficiency of coal-fired power plant (CFPP) in the development of circular economy, analyzes the influence factors of resource value efficiency level, and establishes the matter-element evaluation model of RVF efficiency for CFPP. It also illustrates the application process of extension comprehensive evaluation method through case studies, simply reflecting the efficiency level of RVF in CFPP.
Research on Element Model of Enterprise Network
Authors: Shi Yong Gui
Published: February 2012

Enterprise network is a group of interconnected enterprises and institutions, which connected with information technology. In the process of sharing resources, exchanging resources and transferring resources, they formed a variety of relations based on the same background of social culture and mutual trust in order to respond to market changes quickly. As a kind of special social network, enterprise network also has four basic elements of the social networks, which namely the structure elements, resource elements, rule elements and dynamic elements. Structural elements is the most intuitive expression form of enterprise network, including the structure of enterprise network agents and the relation between enterprise network agents; rule elements affects or determines the behavior rules of enterprise network agents, which also affects the flow of resource elements in enterprise network; resource element is the resources that belong to enterprise network agents or they access to; dynamic elements is the external environment that affects the enterprise network.
Fuzzy Group Multi-Criteria Decision-Making on Selecting & Evaluating of AMT
Authors: Zhu Xiao Xia , Zhang Wei Wei
Published: February 2012

The advanced manufacturing technology (AMT) is the important symbol of the national industrial modernization level. Because of fuzzy and uncertainty of reference information for decision,traditional evaluation methods often determined not accurately and efficiently. According to the evaluation of problem, based on the Fuzzy control technology, this paper firstly put forward a method of fuzzy group multi-criteria decision-making, which applies with the information of either weight coefficient or policymakers weight coefficient incompletely and decision makers having risk attitudes. Then on the basis of constructing the evaluation criterion system of advanced manufacturing technology, an example of some enterprise with AMT selecting project evaluation is given to explain the feasibility and availability of this method for helping decision-makers in determining the optimal conditions of AMT in uncertain environment.
Ergonomic Evaluation of Adjustable Care Beds in Passive Motion Procedure
Authors: Wang Jian , Sun Lin , Wang Qi
Published: February 2012

The study investigates the factors underlie risk and comfort in complex situations provided by adjustable care bed(ACB) in passive motion procedure, also quantified the influence of forces to comfort. Subjects simply trained took part in the measurement on three types of adjustable care beds, they experienced the passive motion process, then reflected their feeling and conducted the questionnaires. Motion limitation and influencing factors were defined according to reflection of subjects. Conclusions are drawn from results of quantified subtle influence of forces to define the motion limitation of ACB. A series of recommendations to improve passive motion of ACB were given, also to predict the feasibility of unprecedented functions or new postures provided by mechanical assistance to some extend.
The Influence Factors Analysis on Response Speed of Agile Supply Chain
Authors: Fan Lei , Yi Hua
Published: February 2012

This paper points out that the rapid response is the core competitiveness of agile supply chain, discerns influence factors on response speed effectively, and expounds how these factors influence the operational efficiency of the agile supply chain. Finally, it provides reference to enterprise about how to analyze various factors on response speed and improve related factors by constructing grey correlation model.
Enterprise Inventory Control Based on Supply Chain Management
Authors: Zhang Qing Ying , Chi Ying , Liu Yu , Shi Qian
Published: February 2012

The main target of supply chain management is to control inventory of each node enterprise effectively with the minimum cost. In this paper, the control strategies and methods of inventory based on supply chain management are put forward, which are significant for saving the cost of supply chain and improving the overall benefits of the whole chain.
Research on Planning of Hybrid Hot Charge Rolling Base on Specific Reheating Furnaces
Authors: Liang He Lan , Li Su Jian , Li Hong
Published: February 2012

The advantages of hybrid HCR have not been fully displayed because recently planning and scheduling of hot strip mill seldom consider how to avoid slabs with extremely different temperatures charging into the same reheating furnace. In this paper, the method base on specific reheating furnaces is proposed and both ant colony algorithm and simulation method are designed to solve the problem. Production data from one steel company is used for model validation.