bluuebunny/crossref_metadata_2025 huggingface dataset:
Survey of Punishment on Violation of Discipline by Students of College of Petroleum and Natural Gass Engineering and Countermeasure Study
Authors: Liu Jing Cheng , Li Wen Hua , Wang Zhen Ku
Published: October 2011

Violation of discipline by students may have a direct impact on the school spirit and academic atmosphere construction of colleges and universities and is becoming a hot issue which is brought to public attention. Survey and analysis have been conducted on violation of discipline by students of Petroleum and Natural Gass Engineering College from such three aspects as type of discipline violation, type of punishment as well as education background of students being punished so as to better adapt to the student management work under new situation and timely and accurately grasp the trend of student discipline violation in current stage. The paper aims to analyze and explore the reasons of discipline violation by students of Petroleum and Natural Gass Engineering College and its inherent law through deep analysis on both subjective factors and objective factors leading to disciplinary offence. Corresponding precautionary measures and countermeasures have been put forward to reduce and even avoid the occurrence of disciplinary offence by students.
Theoretical Study on Axial Capacity of CFRP Reinforced Self-Stressing Concrete Filled Steel Tubes
Authors: Li Hui , Deng Jun , Lin Jun Hong
Published: October 2011

Since the expansion of the cement during curing was constraint by the steel tube, the concrete core in the self-stressing concrete-filled steel tubes (SSCFST) is under tri-axially compression before applying load, which increases the axial capacity of the SSCFST. In addition, Carbon fiber reinforced polymer (CFRP) wrapping can avoid bucking of the steel tube, increase the axial capacity and improve the durability of SSCFST. This study presents a theoretical study on axial capacity of the SSCFST wrapped with CFRP sheets. Several basic assumptions are proposed. The ultimate equilibrium method was employed to analyze the axial capacity, of which two limit states, including steel tube bucking and CFRP sheets rupturing were considered. The analytical results from an example show that the initial self-stress improves axial capacity of the SSCFST by about 30% and the CFRP reinforcement improves axial capacity by about 15%.
SiO2 Coatings Prepared by Sol-Gel Process Protecting Silver from Atomic Oxygen Erosion
Authors: Duo Shu Wang , Song Mi Mi , Liu Ting Zhi , Li Mei Shuan
Published: October 2011

SiO2 coatings were deposited on silver foils substrate by sol–gel method and their atomic oxygen (AO) erosion resistance was tested in a ground-based AO simulator. The surface morphologies and structures of the SiO2 coatings were investigated by Scanning Electron Microscopy (SEM) 、X-Ray Photoelectron Spectroscopy (XPS). The experimental results clearly demonstrate that this kind of coatings provided a good protection from AO attack. The erosion yield of the coatings was 2×10-26 cm3/atom, decreased by 30 times compared with that of the uncoated silver foils. This SiO2 layer significantly retarded the penetration of oxygen atoms, preventing further oxidation of the bulk silver. It was found that after AO exposure, the film structure tends to transfer from SiOH to amorphous SiO2. This implies that a more stable amorphous SiO2 structure could be formed in sol-gel SiO2 film during AO exposure. The results demonstrate that the coatings prepared by sol-gel technique can protect the silver from atomic oxygen erosion and can be used easily for practical application.
Energy-Saving Techniques of Full-Scale Green Building Analysis Research - Taiwan’s First Zero-Carbon Green Building
Authors: Wang Yu Chung , Lin Hsien Te
Published: October 2011

This research is based on Taiwan’s first zero-carbon green building-Magic School of Green Technology in National Cheng Kung University. Actual energy consumption will be measured to explore benefits of energy-saving. The design origin for this building encompasses 13 green energy-saving techniques. United States Department of Energy dynamic building energy analytical software, eQUEST, is used to execute the strictest energy consumption analytical assessment. It is forecasted to reach an energy-saving efficiency of 65% with energy use intensity (EUI) of 43 kWh/m².yr for the whole building, far below that of 169 kWh/m².yr found in Taiwan low/mid-rise office buildings. This building has begun operation in 2011, through actual readings from Building Energy Management System (BEMS) during January to June, first-half-year accumulated EUI of 19.3 kWh/m².yr against eQUEST analytical assessment of 22.5 kWh/m².yr for the same period. Actual energy consumption analysis for air conditioning, lighting, socket outlet, and power equipment, respectively recorded 41.7%, 11%, 22.3%, and 25% in June. Demonstrating that eQUEST analytical assessed value is very consistent with building’s actual energy consumption readings. The energy consumption standard in the experimental research behind the Magic School of Green Technology stands at world class.
Study on the Starting Process Driven by Accumulator of a Hydraulic Free Piston Engine
Authors: Xia Bi Zhong , Su Gang , Xie Hai Bo , Yang Hua Yong
Published: October 2011

Starting system plays an important role in a hydraulic free piston engine (HFPE) and hydraulic accumulator/directional control valve combination is often employed. In this paper, the starting process of a typical starting system composed of a hydraulic bladder accumulator is firstly described, and then the mathematical model of the starting system is established and analyzed as well as some special situations are discussed.
Analysis of Fluid Flow in Screw Pump Based on ANSYS
Authors: Wang Dian Jun , Yan Xiang Zhen
Published: October 2011

In order to complete the numerical simulation on internal flow and operating characteristics of down hole multiphase pump compress unit, establishing perfect finite element model, the three-dimensional turbulent current fields inside the impellers of compression unit for down hole multiphase pumps were simulated by using ANSYS. The calculation of multiphase flow is based on the standard k-ε turbulent current model. Reference information for the improvement of the pump can be obtained by the analysis of the flow of gas-oil in the channel of pump. Based on the finite method, we analyzed several situations in a pumping period. The velocity and liquid pressure distributing of sucker rod pump is studied in this paper, which may offer some evidences for the engineering design of sucker rod pump.
Continuous Rotary Motor Electro-Hydraulic Servo System Based on the Zero Phase Error Tracking Controller
Authors: Wang Xiao Jing , Li Jian Ying , Wu Bo , Shao Jun Peng
Published: October 2011

In order to suppress the friction and leakage interference of continuous rotary electro-hydraulic servo motor, make the motor tracking the periodic signals with high accuracy, and improve the high frequency response performance of continuous rotary electro-hydraulic servo motor, this paper established the mathematic model of the electro-hydraulic position servo system of the continuous rotary motor, and adopted the controlling method based on the zero phase error tracking controller to suppress the interference. Through the simulation, the result confirms that the zero phase error tracking control method decreases the tracking error of the system, increases the robust performance of the system and improves the frequency response performance of continuous rotary electro-hydraulic servo motor. This method is simple and feasible.
Effect Review of the Strengthening Technique by Use of the External Prestressing
Authors: Bao Long Sheng , Yang Dan , Yu Ling
Published: October 2011

The grand bridge of Fu Feng is prestressed concrete cross-section continuous girder, which is reinforced with external prestressing. Construction monitoring is based on the measured data, and using the finite element method to calculate, it need to analyze the control of the stress and deflection in the construction to ensure to make the construction could be completed on schedule and to reach an ideal type. The field monitoring result indicates that the type of bridge did improve and reach the requirement of design after reinforcement.
Effects of High Dielectric Constant Abrasives on ECMP
Authors: Li Wei Si , Guo Dong Ming , Jin Zhu Ji , Wang Zhe , Yuan Ze Wei
Published: October 2011

ECMP (Electro-Chemical Mechanical Polishing) presents high removal rate, low polishing pressure and good polished surface because the action of electrochemistry accelerates copper dissolution. It is considered to be a most promising novel Cu planarization process to replace traditional CMP (Chemical Mechanical Polishing). However, the micro asperity heights of coarse surface are often too small compared to the distance between anode and cathode, so the asperities are difficult to be selectively removed. In this paper, high dielectric constant abrasives were used in ECMP to solve this problem. High dielectric constant abrasives can improve the distribution of electric field, amplify the gradient of electric field and enhance the ability of selective removal. Based on the results of experiments, rutile TiO2, as one of high dielectric constant abrasives, is better than SiO2 and anatase TiO2 in ECMP process. The material removal rate of electrolyte containing rutile TiO2 is 0.078mg/min, and the surface roughness is Ra18.2nm.
Impact of Climate Conditions on Field Reliability of Vehicles
Authors: Jiang R. , Liao Ya Xi , Fei Chen Lei
Published: October 2011

This paper deal with an analysis of impact of climate conditions on field reliability of vehicles. Two case studies are presented. One case study deals with four heavy vehicles used in a steel mill in Guangzhou, China; and the other deals with 22 buses operated in Changsha, China. The field reliability is measured by monthly average MTBF; the climate conditions are described by monthly average temperature, monthly average relative humidity, and monthly average rainfall. The influence of these variables on the reliability of the vehicles is quantitatively analyzed. It is concluded that the climate conditions have a significant influence on the reliability of the vehicles and the influence can be different in different sites. The analysis is useful for the operational and maintenance management of the vehicles.
The Mechanical-Stress-Field of Matrix in Eutectic Ceramic Composite
Authors: Cheng Zhao Gang , Ni Xin Hua , Liu Xie Quan
Published: October 2011

Based on the interaction between nano-fiber and eutectic interphase, forth-phase mode is used to get the mechanical stress field of matrix in eutectic composite ceramics. The effective flexibility increment tensor of eutectic ceramic composite is obtained by the volumetric average strain. The remote stress boundary condition of the eutectic composite ceramis is accounted for getting the mechanical stress field in matrix. The results show the mechanical stress field of the matrix is associated with the stiffness and the volume fractions of each component in eutectic composite ceramic , the shape of interphase and nano-fiber. The stresses in matrix will decrease due to the strong constraining effects of the eutectic interphase. The eutectic interphase make the eutectic composite ceramics strengthen.
Analysis on a Novel Coaxial Magnetic Gear
Authors: Man Yong Kui , Zhang Yi Sheng , Zhao Yu Shuang
Published: October 2011

This paper analyzed the high efficient performance of a novel magnetic gear, which offers several advantages compared to mechanical gears in terms of reducing maintenance, improving reliability and inherent overload protection. The magnetic gear, based on step motor principle, was analyzed on transmission torque both statically and dynamically. With the static theoretical results verified by using Finite Element Analysis, we deduced a dynamic model and programmed to demonstrate the dynamic process. Dynamic characteristics were draw in the conclusion.
Antenna Placement Analysis for Coherent MIMO Radar with Phased Synchronization Errors
Authors: Ma Peng , Zhou Qing Song , Zhang Jian Yun
Published: October 2011

Phase synchronization errors are practically inevitable, so in this paper the quantitative tool to asses the effect of antenna placement for localization performance with phased synchronization errors is provided. The lower bound of mean-square error (MSE) is set by the hybrid Cramer-Rao bound (HCRB) for the joint estimation of the target location and phase synchronization errors at the receivers. It is shown that HCRB follow up to a lower limit, determined by the synchronization error variance and the number of transmit and receive sensors. For uniform antenna distributing, symmetrical placement is optimal, and all forms give exactly the same performance. The localization performance of nonuniform arrays when the antennas are spread out as much as possible is a little better than symmetrical placement at high SNR. Simulation results verify the correctness of conclusions.
A Novel Improved Web Structure Mining Algorithm
Authors: Zhao Li Dong , Liu Sheng Hui , Chai Qing
Published: October 2011

In this paper, a compact and effective web structure mining algorithm is developed according to the hypertext induced topic search (HITS). Firstly, the environments of traditional web structure mining are explored. Secondly, by analyzing the existing techniques, the existing problem and the lack of previous methods are explored. Finally, amid to overcome the deficiency of the traditional method, the paper introduced the time parameter and proposed a novel web structure mining algorithm. It turns out that the proposed algorithm has better effective and accuracy compared to the traditional methods.
Combing the Servo Velocity Sensors and the Wireless Sensor Networks: Feasibility Study
Authors: Kan Yao Chiang , Lin Hsueh Chun , Hong Yao Ming , Chang Min Li , Lin Chi Chang
Published: October 2011

Applying the wireless sensor networks (WSN) to bridge vibration measurement not only provides the on-time monitoring but also reduces the cost of wired system significantly. The servo velocity sensors (SVS) are the most popular sensors of vibration measurement for the civil infrastructures such as bridges. In this feasibility study, a mote-integrated converter module is designed and implemented for connecting the SVS and WSN. The major limitation of this application is the low-bit rate wireless transmission. Through several field measurements, the number of nodes in a wireless channel is advised to be two at most and the multiple single hop schemes are suggested for the vibration monitoring applications. Utilizing the WSN to monitor the on-time bridge vibration is feasible and the application can be further optimized by employing the distribution algorithms specific to the vibration measurements.
A New Method of Product Configuration for Customization System into Supply Chain
Authors: Sun Xue Yan , Jiang Xing Yu , Wang Shi Jie , Zhang Xin Min
Published: October 2011

To establish the configuration relations of complex product in the process of customization into supply chain, a new method of product configuration based on polychromatic graph theory was put forward. Then the optimum product structure configuration mathematical model was got and the improved ant colony algorithm was employed to solve the problem. The results showed that the solution quality got by improved ant colony algorithm was better than the solution got by traditional ant colony algorithm, and the product configuration model can exactly present the configuration information, product attribute and assembly relation for complex product. The customization system offers a kind of new way to meet customers’ requirements that the customers are eager for consumption of varieties, small batch production, short cycle and high quality.
Design of Rapid Positioning Multi-Axis and Multi-Blade Saw Machine
Authors: Zhang Zhao Hao
Published: October 2011

We design a rapid positioning multi-axis and multi-blade saw machine in order to meet the processing needs of outer ply of engineered wood flooring and wood shutters in China. The machine uses two sets of saws against cutting in the cutting width, so its saw blade is thin, cutting loss is small and cut-turn percentage is high. Meanwhile, it has the feature of rapid positioning, convenient operation and high precision machining, which provides ideal processing equipment for China sheet production.
Development of RFID-Enabled Tool Management System
Authors: Ren Nai Fei , Zhang Jun , Zhao Yan
Published: October 2011

Due to the lack of realtime and accurate collection of status and position information of tools, the management of tools in a factory is always not efficient enough. In this paper, the architecture of RFID-enabled tool management system is proposed first, and a tool coding scheme based on EPCgloble is introduced later. RFID middleware for tool management with key features and its components are described afterwards. The system is developed on ASP.NET platform, and experiments show that the new tool management system improves the data collection and automation of tool management.
Freeze Drying Technology Forming Drug Release Bionic Scaffolds with Gradient Structure
Authors: Lin Liu Lan , Zhou Li Ping , Wang Zhi Kun , Hu Qing Xi , Fang Ming Lun
Published: October 2011

A kind of drug release bionic scaffold with gradient structure was designed to release drugs. The scaffold mould had been designed with CAD software and fabricated with rapid prototype. The bionic beta-tricalcium phosphate (β-TCP) scaffold was fabricated with freeze drying. It was composed of two coaxial cylindrical porous scaffolds. The internal loose scaffold was embedded in the outer dense layer. The two different density layers of the scaffold could be used to adjust the drug releasing rate through regulating the slurry concentration. The scaffold was distributed with pores ranged from 30μm to 100μm. The research indicated that the scaffold with gradient structure could be loaded with two kinds of drugs which were released at different rate. The scaffolds were fit as the substitute materials for bone repairing.
GE PAC and Image Processing Based on the Corn Automatically Grading System Design
Authors: Gao Jin Gang , Wang Hua , Zhang Shuang , Wang Shan Gang , Yu Lei
Published: October 2011

The current corn classification is mainly handicraft. This method is low efficiency, labor intensive, and has failed to meet the requirements of production. This system unifies PAC and machine vision, designed a corn grading system. The whole system has configuration monitored and controlled by using machine PAC visual technology and Device Net field bus technology, the system has a safe and reliable operation, classicists accurately and rapidly. This system can significantly improve the efficiency and frozen corn sorted product quality, sort and speed over40 per minute, sorting accuracy can reach more than 99 percents. Demonstrates PAC technology in sorting system unique flexibility and expansibility, better realize the controlled object of automation control, has wide application prospects.
Image-Based Inspection System for Detection of Glass Substrate’s Edge Defects
Authors: Hsu Quang Cherng , Lin Chi Ming
Published: October 2011

Large size TFT-LCD (Thin-Film Transistor Liquid-Crystal Display, which is commonly called as panel) is made after lots of processes and is cut based on the required size in the last process. Deckle-edge (Burr) and other defects were produced by cutting. Therefore, it needs to examine the products’ defects before grinding the edges or the following processes. This research developed a new type and high-efficiency apparatus for panel-edge inspection. The defects are sorted based on three types “Fractures, Cracks and Dark-spots” by using image-subtraction, binary thresholding, and blob-analysis methods. The proposed system can improve the efficiency on panel-edge inspection for panel manufacturers. The production of flat panel-edge inspection can be increased to over 40% which can resolve the bottleneck processes for panel industry.
Key Technologies Research of an Interactive Realistic Graphics Visualization System Based on Visual C++ and OpenGL
Authors: Geng Tie , Ren Qing Hai
Published: October 2011

Based on Visual C + + and OpenGL technology, an interactive realistic graphics visualization system is researched and developed, which has STL 3D-model modeling, realistic graphics rendering and mouse-based interaction function. The key technologies such as STL 3D-model modeling, realistic graphics render and interaction are researched.
Multi-Body Model Identification of Vehicle Semi-Active Suspension Based on Genetic Neural Network
Authors: Zhang Jing Jun , Han Bing An , Gao Rui Zen
Published: October 2011

A multi-body vehicle dynamics model was established using ADAMS and a multilayer feed forward neural network of series parallel structure was built by Matlab in this study. The weights and threshold of neural networks which has built was optimizes by GA. This method was used in identifying multi-body vehicle dynamics model. The results show that the maximum error of identification is less than 0.05% and the network convergence rapidly. The designed genetic neural network could replace the vehicle semi-active suspension systems using in neural network adaptive control which can avoid the difficulty of establishing accurately mathematical model and the poor effective of traditional identification methods for the vehicle semi-active suspension.
The Fatigue Life Analysis of the Crosshead Based on ANSYS
Authors: Yuan Xin Mei , Zhou Si Zhu , Huang Tian Cheng
Published: October 2011

With three-dimensional finite element method, the crosshead of plunger pump was analyzed. The distribution law of stress at the crosshead was obtained and the stress concentration coefficient of high stress field was calculated. The life of crosshead was estimated by S-N curve of crosshead and the result of finite element analysis, which provides basis of estimating life of the crosshead.
Artificial Fish Algorithm to Solve Traveling Salesman Problem
Authors: Wang Jian Ping , Liu Yan Pei , Huang Yong
Published: October 2011

TSP has been studied in many methods by various algorithms. with the increase of the TSP scale, there are some problems appear in the related solution ,such as solving the optimal solution and so on. With the increasing calculation nodes, the convergence degree and computing difficulty of TSP will increase enormously. Artificial fish is an optimize algorithm based on biology model putting forward at present. Proposed a solution for TSP based on the Artificial fish algorithm, describes the mathematic model of TSP, and Expounds the steps of the algorithm in details. by testing the algorithm, we know that, the algorithm can obtain the best solution, in global search, convergence rate,,but the robustness has to be improved in the future.
Efficiency Analysis of Manufacturing Enterprises Informatization from Value Chain View - Based on DEA and Tobit Model
Authors: Guo Wei , Huo Ming , Shao Hong Yu , Wang Lei
Published: October 2011

According to IT investments into performance process model, the paper measures the manufacturing enterprises informatiaztion process efficiencies by value chain DEA model from relevant data indicators of manufacturing enterprises in China. The enterprise informatization consists two processes: IT investments transformation into IT assets and IT assets transformation into the IT impact, which happen inside the enterprises. So, the value chain DEA model is suitable to measure the two processes efficiencies. Finally, the paper analyzes enterprise informatization factors that influence the two processes efficiencies, in order to provide theoretical guidance to improve informatization process efficiencies of Manufacturing Enterprises.
Performance Optimization of Flexure Hinges Using Genetic Algorithm
Authors: Li Bing , Gou Jin
Published: October 2011

The flexure hinge is an important part of micro-displacement table in the precision instruments. To improve the performance of micro-displacement table, the key parameters of its flexure hinges: radius and thickness of hinge and length of connecting rods etc. are studied. Aiming at a commonly used parallel four-bar flexure hinges structure, the parameters of flexure hinge are optimized by using the genetic algorithm under the condition that the frequency of objective function approaches a maximum value.
Petri Net and GA Based Method for JSP Optimization with Dual-Objective
Authors: Qi Li Xin , Tao Ze
Published: October 2011

A new dual-objective scheduling method based on the controlled Petri net and GA is proposed to the job-shop scheduling problem (JSP) constrained by machines, workers. Firstly, a detailed analysis of supervisory control for Petri net with uncontrollable transitions, especially important, for OR-logics linear constraint, a new method for constructing a Petri net feedback controller based on monitor and inhibitor arcs is presented. The Petri net model is constructed based on above method in flexible JSP. Then, the genetic algorithm (GA) is applied based on the controlled Petri net model and Pareto. Function objectives of the proposed method are to minimize the completion time and the total expense of machines and workers. Finally, Scheduling example is employed to illustrate the effectiveness of the method.
Texture Evolution during the Cold Rolled Low Carbon Steel Sheet under CSP Technology
Authors: Jin Zi Li , Ren Hui Ping , Wang Rong
Published: October 2011

In this item, the low carbon steel hot sheets by compact strip production (CSP) technology were cold rolled and annealed in laboratory. texture evolution during the production process of CSP-cold rolled strip were investigated by means of the XRD. The results were as follows: After hot deformation of thin slab formed a strong γ- fibre orientation texture, the density of texture increase with the cold rolled reduction increased, especially for the negative texture {100}, in γ-fibre orientation cold rolling texture density has no significant change. Compared to the traditional process, hot rolled steel sheet has higher texture, cold-rolled steel sheet has the same texture, and after-annealing sheet has further higher texture in the CSP-cold rolling process. This study enables better understanding and control on the evolution of textures the cold-rolled steel sheet processed by CSP technique and provides theory support for exploiting the CSP the cold-rolling deep drawing steel sheet
Research on Flow Press Servo-Valve Controlling Electro-Hydraulic Force Control System and Nonlinear Performance Analysis
Authors: Li Jian Ying , Shao Jun Peng , Wang Xiao Jing , Qin Bai , Qiao Yu Jing
Published: October 2011

The configuration and the work principle of the flow press hydraulic servo-valve was introduced in this paper, based on this and electromagnetic basic theory, the mechanics analysis of every main parts of the flow press hydraulic servo-valve and the liquid basic theory especially the flow continuity equation, the mathematic model of the flow press sever-valve was built, during the process of building the model, the author took into account the load moment brought by the pair of spray nozzles flow force and the load moment brought by the force couples back pole and the fundamental equation of the force moment motor. On the other hand, the author analyzed the influence of the nonlinear factor to system performance, and the nonlinear factor was valve port overlap length disaccord caused by machining error. The mathematic model of the electro-hydraulic force control system controlled by the flow press servo-valve with valve port error was built. The results of simulation and experiment showed that valve port error badly influenced the system performance, and that valve port error was the main reason of the pressure higher than the supply pressure, which is one of the two cylinder cavities. The simulation curve and the experiment curve were accord compared by system simulation and experiment results, so we can know that the mathematic model of the flow press sever-valve and of the electro-hydraulic force control system controlled by the flow press servo-valve is correct.
Research on Optimization of Cutting Parameters Based on Genetic Algorithm
Authors: Zhang Shu Ren , Li Xue Guang , Wang Jun , Wang Hui Wei
Published: October 2011

Three elements of Cutting dosages have a great effect on parts surface quality and working efficiency, the best organization of cutting three elements for parts surface quality must be found before machining, in order to surface roughness and machining cost of parts, multi-objective optimization model is established in this paper, model is solved by using genetic algorithm. Based on the BP neural network of three layers, forecasting model of surface roughness is established. According to existing experiment data and optimized cutting dosages, analysis and prediction of surface roughness is done. Machining experiment is done by using optimized data. The experiment result verifies feasibility of this optimistic method and prediction method of surface roughness.
Research on the Application of Parametric Technology on Product Modeling
Authors: Liu De Fang , Li Li Ying , Tao Jie , Wang Bin
Published: October 2011

Part family and NX/Open programming techniques which are two kinds of parametric technology used in product modeling based on NX platform are introduced in this paper. The template of 3D part library was created on the base of analysis of different national standards. The key technology of product secondary development was narrated in detail, and the operation interface was created. Finally, a case was employed to testify the feasibility and efficiency of these two parametric modeling technologies.
Simulation and 3D-Solid Modeling of Skew Bevel Gear
Authors: Zhang Luo Ping , Fu Jing , Yang Bo Yuan
Published: October 2011

In this paper, the basic concept and specific steps of establishing skew bevel gears mathematical model using conjugate meshing principle was introduced. Numerical value counting function of MATLAB was used to collect coordinate of tooth surface grid point, and under the Pro/E environment, data document of coordinate created by MATLAB was imported to establish tooth surface modeling , relying on the powerful function of complicated curve modelling, 3D solid modelling of gear was completed. The results via motion analysis kinematics analysis and interference inspecting under assembling condition show the accuracy of the design ,which supports further design, analysis and manufacture.
The Design of Intelligent Water-Saving Irrigation System for Greenhouse
Authors: Wang Fu Gang , Xu Li Jia , Du Chun Long , Yang Yang , Li Ye Sen
Published: October 2011

In the premise of ensuring the high yield of the crops in greenhouse, how to save water has became a research focus in precision agriculture. An intelligent water-saving irrigation system based on fuzzy control is designed in the paper. By the proposed system, the best water consumption can be calculated to meet the goal of high yield but low water-using. In the system, the soil moisture sensor TDR-3 is used to measuring the soil humidity data, whiles the radio frequency identification (RFID) modules, i.e., nRF905, is applied to transmit the data wirelessly. The control interface based on LABVIEW on PC is designed as well. Thus the goal of saving water consumption and querying historical data can be accomplished.
The Research on the Management of Project Group for Flexibility Based on Fuzzy Comprehensive Evaluation
Authors: Zhang Yun Ning , Cai You Hong
Published: October 2011

Project group is characteristic of dynamic uncertainty and higher complexity ，which decides its management methods need to have enough flexibility. Based on the analysis of the flexible influence factors of the project group of management, the paper constructs the project group management flexibility evaluation index system, introduces fuzzy comprehensive evaluation method to the evaluation, and in order to increase its objectivity and feasibility ures the gray correlation analysis method to determine the weights during the process of solving. Finally provides an application example to show that the method is effective and practical.
Based on Embedded System's Vehicles Immunity PID Controller Design
Authors: Yang Xi Wang , Huang Jin Ying , Wang Hao Jing
Published: October 2011

The method to analysis the strength of planetary trains’ carriers of EPB(earth pressure balance) shield machine is presented in this paper. The structure of the shield machine trains is analyzed and the 3-D solid model of the carrier is built with Pro/E. After the load on the carrier has been dealt with, the strength of carrier is calculated by means of finite element method. The results via ANSYS show that the max stress and strain on the carriers are increasing as the increasing load on it. The max stress is lying on the joint point of the carrier and planetary gear shaft because of the bending deformation of the shaft.
Topology Optimization for Nonlinear Kirchhoff Plate Using RKPM
Authors: Zhang Jian Ping , Jiang Yan Kun , Gong Shu Guang , Liu Xin
Published: October 2011

In this paper, the topology optimization of nonlinear Kirchhoff plate was studied by using meshless Reproducing Kernel Particle Method (RKPM). The relative densities of nodes were chosen as design variables to eliminate the checkerboard pattern, and the visibility criterion method was used to dispose the discontinuity of RKPM approximation function in the nonlinear Kirchhoff plate. The topology optimization model of nonlinear Kirchhoff plate based on RKPM was developed, and the topology optimization procedure was given in detail. Finally, all the Matlab programs were written, and one numerical example shows the advantage of the present method.
Characterization and Corrosion Behavior of Biodegradable Mg-Ca and Mg-Ca-Zn Implant Alloys
Authors: Bakhsheshi Rad Hamid Reza , Idris Mohd Hasbullah , Kadir Mohammed Rafiq Abdul , Farahany Saeed , Fereidouni Amir , Yahya Mohd Yazid
Published: October 2011

In the present study binary Mg-xCa (x=0.5 and 1.25wt.%) and ternary Mg-1Ca-xZn (x=0.5 and 1.5wt.%) alloys are produced by casting the molten metal in a metal die at a temperature of 740°C. The microstructure analysis of the Mg-Ca and Mg-Ca-Zn alloys were studied by OM, SEM and EDX. The corrosion behavior of alloys was evaluated via potentiodynamic polarization test in Kokubo solution. The result exhibited that the grain size decrease with rising Ca content in Mg-Ca alloys and degree of grain size reduction further decreased by adding Zn to Mg-1Ca-Zn alloys. The microstructure of Mg-Ca alloys were constituted of primary Mg and lamellar eutectic (α-Mg+Mg2Ca) phase, Whilst Mg–1Ca-Zn alloys were composed of primary Mg and eutectic (α-Mg+Mg2Ca+Ca2Mg6Zn3) phases. In addition with increasing Ca and Zn the amount of Mg2Ca and Ca2Mg6Zn3 increased respectively in grain boundaries. Electrochemical test shows that the addition of Zn leads to improve corrosion resistance of the Mg–1Ca-Zn alloys as a result of the formation of Ca2Mg6Zn3 phase, whilst the addition of more than 0.5 wt% Ca to Mg-Ca alloys result in decrease corrosion resistance due to the formation Mg2Ca.
Research on Microstructure of Long Term Marine Immerged Concrete
Authors: Feng Shu Rong , Li Zhong Hua , Su Chao
Published: October 2011

Corrosion is a major concern for the durability of concrete structures under marine environment. In this paper three series of concrete was immerged in sea water to reseaech its development of compressive strength, microstructure and corrsosion production. The results showed that compressive strength of controlled concrete was decreased but it can further increased added fly ash and silicon fume after immerged in sea water. It can be observation by SEM and EDS that a number of complex salt was produced on the surface and AFt was produced inside controlled concrete. It can produce expand and lead to cracks. As result of fly ash and silicon fume added, the crystals of Mg(OH)2 was formed on the surface and no crystal and cracks was produced internal concrete. The compressive strength can still increase after immerged in sea water.
The Energy Saving Effect of Natural Ventilation for Residential Building in Guangzhou
Authors: Qin Cui Cui , Zhao Li Hua
Published: October 2011

Natural ventilation is the most effective measure to reduce the cooling energy consumption, but it is quite difficult to control and quantitatively assess the natural ventilation. A method was developed with coupling simulation by both software of DeST-h and computational fluid dynamics (CFD) in typical meteorological year (TMY) in Guangzhou. First, the base room temperatures with different air change (ACH) rates of natural ventilated dwelling were simulated with DeST-h. The time period in that the indoor air temperature could meet thermal comfort requirement only by natural ventilation in occupied period was analyzed, in which the wind speed and direction in TMY was obtained for the ventilation environment simulation of rooms in windows and doors switching with the PHOENICS software. The actual air change rates in different rooms in such wind speed and direction were calculated. Also the cooling loads of building in the actual air change rates were simulated with intermittent air conditioning. The air conditioning system operated when the base room temperature was higher than 29°C. Rate of cooling loads reduction was calculated by comparing the result to the baseline, which were the cooling loads of building with 1 ACH. The actual air change rates show that the energy saving effect of natural ventilation was influenced by the windows and doors switching. 61~71.37% of the natural ventilation potential was used in the rooms with windows and doors opened, and 14.06~82.54% of the natural ventilation potential was used in the rooms with windows opened and doors closed. The rate of cooling loads reduction in rooms and building were 0.34~10.50% and 6.14% respectively.
A Novel Low Temperature Method to Make a Wireless Accelerometer
Authors: Lin Jium Ming , Chang Po Kuang , Lin Cheng Hung , Zhang Qi Kun
Published: October 2011

This research proposes a novel low temperature manufacturing method to make a wireless accelerometer on a flexible substrate. The substrate deposition temperature is 100°C without causing any strain and stress problem. Since the thermal conductivity of the traditional Si is 1.48 W/ (cm-K), which is 25 times of the flexible substrate, i.e. 0.06-0.0017 W/ (cm-K), thus the power leakage through the substrate can be saved by the new design. The key technology is to integrate a thermal bubble accelerometer and a wireless RFID antenna on the same substrate, such that the accelerometer is very convenient for fabrication and usage. In this paper the heaters and the thermal piles are directly adhering on the substrate surface without the traditional floating structure. Thus the structure is much simpler and cheaper for manufacturing, and much more reliable in large acceleration impact condition without broken. Furthermore, the molecular weight of xenon gas (131.29 g/mol) is much larger than carbon dioxide (44.01 g/mol), thus the performance of the accelerometer will be increased. In addition, the shape of the chamber is changed as a semi-cylindrical one instead of the conventional rectangular type. The average sensitivity is increased by 15%. In addition, if one applies only xenon gas but keeping the rectangular chamber, then the response speed can be increased by 23%. Moreover, if one applies both Xe and the semi-cylindrical chamber, then the response speed can be increased by 43%.
Covariance Intersection Fusion Kalman Estimators
Authors: Gao Yuan , Deng Zi Li
Published: October 2011

By the CI (Covariance Intersection) fusion algorithm, based on the ARMA innovation model, the two-sensor CI fusion Kalman estimators are presented for the systems with unknown cross-covariance. It is proved that their estimation accuracies are higher than those of the local Kalman estimators, and are lower than those of the optimal fused Kalman estimators. A Monte-Carlo simulation result shows that the actual accuracy of the presented CI fusion Kalman estimator are close to those of the optimal fused Kalman estimators with known cross-covariance.
Design and Research of Air-Compressor Control System Based on Fuzzy PID Control
Authors: Li Gong Fa , Xu Si Qiang , Jiang Guo Zhang , Gao Po , Kong Jian Yi , Xie Liang Xi
Published: October 2011

According to the requirements and characteristics of air compressor control systems in the process of air separation, an intelligent control method based on the fuzzy PID was proposed. Through simulating the designed control method, it is concluded that the control effect was extraordinarily satisfactory. It can offer a certain meaning of guidance and reference for the control of other equipment in air separation systems.
Design of Thin Films Removal on Solar-Cells Silicon-Wafers Surface
Authors: Pa P.S
Published: October 2011

In this study, the design of the mechanism of a recycling system using composite electrochemical and chemical machining for removing the surface layers from silicon wafers of solar cells is studied. The reason for constructing a new engineering technology and developing a clean production approach to perform the removal of surface thin film layers from silicon wafers is to develop a mass production system for recycling defective or discarded silicon wafers of solar cells that can reduce pollution. The goal of the development is to replace the current approach, which uses strong acid and grinding and may cause damage to the physical structure of silicon wafers and cause pollution to the environment, to efficiently meet the requirements of industry for low cost. It can not only perform highly efficient recycling of silicon wafers from discarded solar cells to facilitate the following remelting and crystal pulling process, but can also recycle defective silicon wafers during the fabrication process of solar cells for rework. A small gap width between cathode and workpiece, higher temperature, higher concentration, or higher flow rate of machining fluid corresponds to a higher removal rate for Si3N4 layer and epoxy film. Pulsed direct current can improve the effect of dregs discharge and is advantageous to associate with the fast feed rate of workpiece, but raises the current rating. A higher feed rate of silicon wafers of solar cells combine with enough electric power produces fast machining performance. The electrochemical and chemical machining just needs quite short time to make the Si3N4 layer and epoxy film remove easily and cleanly. An effective and low-cost recycle process for silicon wafers of solar cells is presented.
EEMD-Based Speaker Emotional Analysis for Speech Signal
Authors: Qin Yu Qiang , Zhang Xue Ying
Published: October 2011

Ensemble empirical mode decomposition(EEMD) is a newly developed method aimed at eliminating mode mixing present in the original empirical mode decomposition (EMD). To evaluate the performance of this new method, this paper investigates the effect of two parameters pertinent to EEMD: the emotional envelop and the number of emotional ensemble trials. At the same time, the proposed technique has been utilized for four kinds of emotional(angry、happy、sad and neutral) speech signals, and compute the number of each emotional ensemble trials. We obtain an emotional envelope by transforming the IMFe of emotional speech signals, and obtain a new method of emotion recognition according to different emotional envelop and emotional ensemble trials.
FBS-Based Domain Knowledge Base and its Application
Authors: Zhang Hui , Li Wen Qiang , Li Yan
Published: October 2011

The current developed computer aided innovation software is mainly based on universal principle, and it is difficult in providing field knowledge support for the industry and product design. This paper is based on FBS model, systematically discusses the constructing principle of domain knowledge base from the aspect of knowledge acquisition, representation and retrieval. Finally, through an example of the improvement of the cylinder control, which prove the practicability of the Domain Knowledge Base.
Interfacial Assembly and Morphological Investigation of Polythiophene Derivative with Conjugated Side Chain at Air/Water Interface
Authors: Jiao Ti Feng , Zhou Jing Xin
Published: October 2011

A polythiophene derivative with conjugated side chain were synthesized and characterized by LB method. It was found that this polymer can form stable monolayer at the air/water interface. It is important that the interaction between the polymer chains showed important role in regulating the spectra and interfacial morphology of polythiophene polymer, which have been characterized by spectral and morphological investigation. The absorption spectra of the polymer show two absorption peaks located in UV and visible region, where the visible absorption peak is attributed to the -* transition of the conjugated main chains while the UV absorption peak comes from the conjugated side chains. The necklace-like domains could be found and altered with change of surface pressure. The present work provided new insight into the design and interfacial assembly of polythiophene derivative with special molecular structures and substituted groups.
Effect of Bi2O3 Addition on the Physical and Electrical Properties of Lead-Free (Na0.5K0.5)NbO3-(Na0.5Bi0.5) TiO3 Ceramics
Authors: Wang Chun Huy
Published: October 2011

In this paper, the effects of Bi2O3 addition on the electrical and physical properties of 0.98(Na0.5K0.5)NbO3-0.02(Na0.5Bi0.5)TiO3 were investigated. The 0.98(Na0.5K0.5)NbO3 -0.02(Na0.5Bi0.5)TiO3 [0.98NKN-0.02NBT] ceramics with the addition of 0~0.5 wt% Bi2O3 have been prepared following the conventional mixed oxide process. X-ray diffraction analysis revealed that, during sintering, all of the (Na0.5Bi0.5)TiO3 diffuse into the lattice of (Na0.5K0.5)NbO3 to form a solid solution, in which a orthorhombic phase with a perovskite structure was found. For 0.98NKN-0.02NBT ceramics by doping 0.1 wt% Bi2O3, the poled dielectric constant (K33T) and the electromechanical coupling coefficients of the planar mode kp reach 684 and 0.38, respectively, after sintering at 1100 °C for 3 h. Our results show that 0.98NKN-0.02NBT with the addition of 0.1 wt% Bi2O3 is a good lead-free piezoelectric ceramic.
Multi-Objective Optimal Design of Frame Structures with Group Search Optimizer
Authors: Liu Feng , Li Li Juan , Yuan Bing
Published: October 2011

Multi-objective optimal design of frame structures was carried out by group search optimizer with Pareto solutions theory in this paper. A one bay frame structure was employed to evaluate the performance of group search optimizer. Calculation results show the stochastic algorithm has excellent performance in terms of convergence rate, feasibility, practicality and superiority in structure optimal design.
Research on Dust Cast Using Vibration Screen Technology
Authors: Wang Xiang Wei , Qin Lei , Wang Yang , Yang Li Jun
Published: October 2011

A vibration simulation model of a dust-cast device for imitating the different environments has been established, and ADAMS has been used for analyzing the performance parameters. Through the analysis of the simulation results, the device has been designed, and the position of loading was optimized.
Ultrafine Tungsten Powder Obtained with Violet Tungsten Oxide Using Circulatory Oxidization-Reduction Method
Authors: Fu Xiao Ming
Published: October 2011

Violet tungsten oxide is prepared with pure ammonium paratungstate in the argon gas. Tungsten powder is obtained with violet tungsten oxide through deoxidation in the hydrogen gas (Rate of purity: 99.99 %, dew point: -40 °C), and tungsten powder is oxidized in the air. Tungsten oxide is reduced with tungsten powder in the hydrogen gas. The samples are characterized with the laser particle size distribution measuring instrument and field-emission scanning electron microscope. The results show that ultrafine tungsten powder is obtained through circulatory oxidation twice and reduction three times. The percentage of the particle size distribution of ultrafine tungsten powder is 95.73 % between 0.1 μm and 1.0 μm.