bluuebunny/crossref_metadata_2025 huggingface dataset:
Design of Proof Mass and System-Level Simulation of a Micromachined Electrostatically Suspended Accelerometer
Authors: Wan Zhen , Cui Feng , Zhang Yun Kui , Liu Wu , Chen Wen Yuan , Zhang Wei Ping
Published: August 2011

A six-axis Micromachined Electrostatically Suspended Accelerometer (MESA) which is based on LIGA-type microfabrication was designed. MESA employs a levitated perforated plate as its proof mass. Three main purposes are considered for the design of the perforated proof mass: (1) reducing squeeze-film effect; (2) improving the dynamic response of MESA; (3) facilitating the etching of sacrificial layer under the plate. This paper utilized a finite element model for evaluating air squeeze film damping effect of perforated proof mass. Among several designs of perforated proof mass, the best choice was found. Besides, a system-level model created in CoventorWare is used to evaluate the effect of squeeze film damping and the dynamic response of the MESA.
Study on Real-Time Compensation RTCP Module of Five-Axis CNC System
Authors: Hu Ze Hua , Gao Wei Qiang , Qing Chao Ting , Fang Cheng Sheng
Published: August 2011

Taking A-C axis dual rotary working table of 5-axis CNC system as an example, the function of RTCP is introduced and the performing difference between standard NC code and RTCP code is analyzed in this paper. Then, the calculation method of RTCP compensation error has been illustrated. Taking the high precision as the objective, a new real time compensation RTCP module theory is presented and its algorithm implementation process is introduced. Then, this algorithm has been simulated using MATLAB and validated in hardware platform.
Studies on the Integration of Geographic Information System (GIS) and Drainage Pipe Network Model
Authors: Tang Yu Fang , Zeng Hong Hu , Lei Chang Wen , Tan Di Na , Wang Bao Liang , Li Yan Hong , Zhu Zong Qiang , Liang Yan Peng
Published: August 2011

With the development of the simulative theory and calculation method of drainage pipe network, urban drainage pipe network model gradually become an indispensable part of the urban drainage system management. The characteristics of modern drainage pipelines,the content of drainage pipelines system model, the problems of combining GIS with drainage pipelines and how to solve them are briefly described in this paper.
Kinematics Analysis of Non-Orthogonal 5-Axis Machine Tools
Authors: Zhou Yang Hong Sheng , Li Jian Gang , Li Ze Xiang
Published: August 2011

This paper deals with the kinematics analysis of non-orthogonal 5-axis machine tools. A systematic kinematics model for all the non-orthogonal 5-axis machine tools is built by improving the robotic manipulation method. And the kinematics model of a special non-orthogonal RT 5-axis machine tool is analyzed as an example and the other type of non-orthogonal 5-axis machine tools can be analyzed in the same way. In addition, a postprocessor for non-orthogonal 5-axis machine tool is developed in Visual C++ 6.0 and the result is simulated in Vericut 7.0.
Corrosion Inhibition of Tinidazole in KOH Solution for Zinc
Authors: Hu Lian Yue , Zhang Sheng Tao , Huang Xiao Hong , Hu Hong Hao
Published: August 2011

The effect of tinidazole on the zinc corrosion in 0.1mol/L KOH solution has been studied by polarization curves, electrochemical impedance spectroscopy (EIS), SEM, and weight loss measurements. It has been shown that tinidazole act as an anodic inhibitor, can effectively restrain the process of the anodic oxidation of zinc.The highest value of inhibition efficiency is 89.39% at 50mg/L concentration.
Vehicle-Bridge Coupling Vibration Influence of Section Profiles on Steel-Concrete Composite Box Girder
Authors: Zhang Bo Gen
Published: August 2011

With the rapid development of study on steel-concrete composite structure, the vibration response between bridge and vehicle under vehicle loads has been always attracted much attention. The performance between bridge and vehicle varies a lot with different section profiles. In this paper, the bridge and vehicle are considered as one interaction system for simulating space dynamic response for vehicle passing through the bridge. The calculation model of steel-concrete box girder with two boxes with double chamber and single box with double chamber are established respectively, their free vibration properties are calculated, and the dynamic properties are analyzed and compared. The coupling responses under different vehicle loads are discussed. According to the analysis and comparison, it can be found that flexural rigidity with two boxes with double chamber is smaller, when single vehicle and double vehicles passing the bridge the Vertical maximum dynamic deflection are 18.4% and 14.7% larger than that with single box with double chamber; the maximum accelerations are 2.69 and 2.3 times as much as that with single box with double chamber respectively, has low sensitivity on bridge-vehicle response. Through the comparison some helpful conclusions are given as reference of such bridges.
The Wear and Drag Predictions of the Micro-Asperities on Textured Wall
Authors: Traore Moussa Magara , Wang Li
Published: August 2011

This study presented a theoretical method to find approximated dimensions of the rectangular micro-asperity. The suitable values required for the asperity’s width and its critical length are found for different values of the flow speed. Numerical calculation is carried out using the solidworks flow simulation; the simulation results illustrated the flow speed trajectory, the variation of the shear stress and the flow pressure on different faces of the micro-asperities. The turbulence area due to the micro-asperity geometry is localized. The prediction of the maximum wear area, due to the skin friction, is also localized in consideration of the shear stress variation.
A Scalable Graphics User Interface Architecture for CNC Application Based - on WPF and MVVM
Authors: Pan Hai Hong , Jiang Jing Jie , Chen Lin , Sun Hong Tao , Tan Hua Qin
Published: August 2011

A scalable Graphics User Interface Architecture for open Computer Numerical Control (GUIAC) application is presented in this paper. The GUIAC is based on Windows Presentation Foundation (WPF) and Model-View-ViewModel (MVVM) design pattern. The WPF and MVVM pattern are used to decouple the User Interface (UI) presentation and business logic. This method makes the CNC application UI presentation design and the CNC application logic implementation work in parallel for improving the development and maintenance efficiency. Using the extensible application markup language can reduce the UI presentation design workload. The GUIAC has a loosely coupled structure with three layers. The experiment results of developing the CNC application using GUIAC show that the application graphics user interface is scalable and maintained easily.
Real-Time Compensation of Ram Thermal Elongation Errors for Heavy-Duty Numerical Control Machine Tool
Authors: Cui Gang Wei , Cheng Feng Lan , Gao Dong , Ma Qing Xin , Liu Yi Lei
Published: August 2011

Thermal error of machine tool is the main in total machine tool error, and obviously impairs the accuracy of the machined workpieces. Ram is a very important component of heavy-duty floor type boring-milling machine, and its thermal deformation is a significant source causing errors in machining process. Aiming at the thermal elongation of heavy type milling boring machine tool ram, the machine tool thermal errors are measured and compensated. Temperature compensation function in NC system is applied. Experiment results shows that 90% ram positioning error can be compensated.
Design of Simulated Riverway Experimental Control System
Authors: Huang Yong Liang , Zhang Guo Ping , Huang Xin Bing
Published: August 2011

In order to realize the intelligent control in simulated riverway control system, the CC-Link bus and Mitsubishi FX2n series programmable controller were used for construct the network of intelligent control system. And the software of this system control was designed to multi-point control all the function of the simulated riverway control system.
Deterministic Macro Chaos of Manufacturing Information System Based on Self-Organization
Authors: Zhang Xiao Hua , Chen Wei , Zheng Shi Xiong
Published: August 2011

A dynamic model of decision-making layer is capable of chaotic behavior when the macro order parameter weight changed, even if the model is completely deterministic. To our knowledge, this is firstly discover chaos by qualitative and quantitative analysis on the basis of self-organizing process analysis and synergetics theory. It will make bases for analyzing corresponding states of the system’s inner in the state of the chaos and for further knowing the essence of chaos and chaos control. On the other hand, macro chaos in manufacturing systems is a new challenge to traditional production management.
Research of Pump- Control Electro-Hydraulic Servo System Based on Multi-Mode Extension Control
Authors: Zheng Hong Bo , Sun You Song , Xian Can Biao
Published: August 2011

Aiming at the contradiction between rapid response, stability and accuracy in position control of pump-control electro-hydraulic servo system, a multi-mode extension control electro-hydraulic servo system was proposed, applying extension method in system design. According to the characteristic information of the system, correlation function was established by multi-mode extension control switch. The movement process was divided into three parts according to correlative degree and controlled in each zone by Bang -Bang controller, fuzzy controller and PID controller respectively. Simulation results showed that the system had rapid response and strong robustness, and can realize high precision control.
Prediction of Power Transformer Fault Based on Auto Regression Model
Authors: Zheng Rui Rui , Wu Bao Chun , Zhao Ji Yin
Published: August 2011

Dissolved gases analysis is the essence to diagnose and forecast power transformer fault. This paper utilized an Auto Regression model to predict contents of gases dissolved in power transformer oil, and adopted Akaike's Information Criterion to determine model order. Then, the prediction results of AR model are compared with results of Gray model. Finally, gray artificial immune algorithm diagnosed power transformer fault types through gases contents predicted by Auto Regression model. Experiments demonstrates that Auto Regression model has a higher accuracy than Gray Model, and the fault prediction results of the proposed algorithm are in accord with the results using real gases contents, thus , the power transformer fault prediction algorithm present in the paper is effective and reliable.
Life Prediction of Hull Based on Weibull Distribution
Authors: Guo Jin Long , Chai Yan You , Han Yang , Zhang Hao
Published: August 2011

In order to research the relationship between the life of hull with different structure and the reliability while using, a life estimation method for hull based on test was proposed. By assuming that the hull life span satisfied the Weibull distribution, with zero-failure data, confidence limit γ and reliability R, the confidence lower limit of reliable life were given according to test data of the hull life span. If the lower limit of the shape parameters of the Weibull distribution were known, this method can accumulate all of zero-failure data to increase the analysis presion of reliability greatly. At last, using this method, under the hull reliability R and the confidence γ, the confidence lower limit of reliable life with the hull structures as steel, titanium alloy and aluminum alloy were computed. The results indicate that the method is easy to compute and very convenient for engineering application.
Design of Automatic Paving Machine for Asphalt Coiled Waterproof Material on Express Railway Bridge
Authors: Tai Yong Cheng , Liu Wen Xue , Shan Gen Li
Published: August 2011

In terms of the problem of paving of asphalt coiled waterproof material on express railway bridge, developed an effective paving machine, and describe the total structure of the machine and the function of important parts. Introducing the characteristic and function of the walking system, automatic speed regulation system for uncoiling coiled waterproof material, agitating and leaking system of binding agent, coiled waterproof material paving self-adapted mechanism of the asphalt road surface, and describing the fundamental principle and function of the machine’s hydraulic control system. The machine can adapt the condition of road surface, realizing wide area paving of waterproof material. It ensures the quality of the paving, and at the same time, enhances the paving efficiency, increases automatic level, and eases labor of technicians.
Research on Influence of CPP Oil Tubes Disposition on Shafting Vibration
Authors: Huang Bing Yang , Liu Gang , Hua Zhi Gang
Published: August 2011

This paper presents a thorough study of a certain CPP shafting and analyzes the shafting natural vibration characteristic using FEM. Simulate the influences of CPP oil tubes on shafting natural frequency and compare it to hollow shaft natural frequency, then acquire the influencing law of CPP oil tubes disposition on the shafting vibration characteristic.
Virtual-Prototyping Oriented Key Research and Development System of Load Haul Dump
Authors: Li Rong , Jia Mei Wei , He Wen Bo , Li Ping Kui , He Yong , Ding Guo Fu
Published: August 2011

According to the development status of underground load-haul-dump vehicle (LHD) development, a virtual-prototyping oriented key research and development system of LHD is proposed. Based on the driven oriented and top-down design concept of virtual-prototyping, combining the overall performance design, multi-body system dynamics oriented characteristic analysis and simulation, machine assembly, main parameters verification and sub-system of LHD design, the new innovation design development system for LHD development is formed. A case study of a three cubic LHD design process is given, considering the multi-body dynamics oriented simulation of LHD overall performance ,the structure strength analysis and fatigue analysis of key components, mechanism optimization design and dynamic kinematics analysis of working device, stability, ergonomics and ROPS/FOPS (Roll-Over Protection System / Fall-Over Protection System) of driving cab, the satisfied design results is finally obtained.
Research on the Pollution of Marine Engineering Construction in Southern Petrochemical
Authors: Zhang Yong Li , Zuo Xun
Published: August 2011

Abstract: For the marine engineering construction of Sinochem Quanzhou Petrochemical Co., Ltd. the pollution of port sewage, wastewater, rainwater and sewage vessels after inspection and testing were quantified. And the air pollution caused by ship emissions and Handling loss was determined. The sources and concentrations of major pollutants were summarized in the study, and the measures to be taken were planned.
Investigations of Tool Wear with Water Vapor as Coolant and Lubricant in Green Cutting
Authors: Zhang Yue , Jiang Tong , Han Li , Li Qi Dong , Sun Tai Li , Zhang Xi Chuan
Published: August 2011

Green cutting is one of the developing tends in the industry field. Water vapor can be introduced in metal cutting as coolant and lubricant due to its pollution-free, generating easily and unneeded disposal. Therefore, a special generating system is developed to produce suitable water vapor, and a simulation to the velocity of water vapor jet flow is presented. Then tool wear was investigated and a new capillary model is proposed, based on the experimental results. According to the boundary-layer theory, the kinetics equations of flow were solute. The velocity and flux of molecule are presented. In the capillary, the adsorption of tool-chip interface results in boundary lubricating film; the conical shape of capillary limits the depth of coolant and lubricant penetrating; and the negative press is the motility for coolant and lubricant penetrating. The study results show water vapor can decrease tool wear about 10% times and 20% comparing to cutting fluids and dry cutting, and water vapor could be a potential solution of green cutting.
Study on Control System of Bearingless Induction Motor Based on Modified Internal Model Control
Authors: Liu Xian Xing , Chen Ming Yi , Shao Xiao Yan , Wang Zheng Qi
Published: August 2011

Bearingless induction motor is a multi-variable, nonlinear and strong coupled system. On the basis of working principle of bearingless induction motor, independent control of suspension control windings is combined with rotor flux-oriented control of torque control windings in the paper. Meanwhile, in order to improve robustness and decoupling performance of system, the modified internal model control (MIMC) is applied in the control of two sets of windings to realize the dynamic decoupling of currents and stable control of radial displacement. The results of simulation experiments show that the proposed strategy has good ability of disturbance rejection and robustness, so the stable operation of motor can be achieved effectively.
Hybrid Force/Position Control Hardware System Design and Force Servo Control Realization
Authors: Tang Hai Tao , Liang Shun Pan , Yao Jian Tao , Guo Lian He , Zhao Yong Sheng
Published: August 2011

The hardware control system of the 5-UPS/PRPU PMT (parallel machine tool) with redundant actuation was reconstructed to realize its hybrid force/position control, which was based on the primary “IPC+PMAC motion controller” system mode. Meanwhile, more perfect open type PMT control platform was constructed. Visual Basic language was used to realize the force servo control of the redundant limb and the relevant experiment was completed in the primary CNC system, combining with the PAMC motion controller library function. The results show that the force servo control strategy is exact and the newly designed hardware control system is effective, these results also provide feasible hardware basis and control method to realize the hybrid force/position control.
License Plate Location Research Based on Texture Analysis & Mathematics Morphology
Authors: Ma Yong Li , Zeng Xuan , Li Jin
Published: August 2011

In the vehicle license plate recognition system, accurate position of license plate is a key step. By analyzing the texture of license plate, a algorithm based on texture analysis & mathematical morphology is proposed . Experimental results shows that this algorithm can overcome the shortcoming of low recognition rate caused by single feature algorithm, has good location effect.
Probabilistic Approach to Robot Group Control
Authors: Stipančić Tomislav , Jerbić Bojan , Ćurković Petar
Published: August 2011

The objective of this paper is to discuss the probabilistic part of the model for robot group control applied in industrial applications. The proposed model is based on well-known concepts of Ubiquitous Computing [1] and enables contextual perception of a working environment. Compared with classical industrial robots, usually preprogrammed for a limited number of operations / actions, the system based on this model can react in uncertain situations and scenarios. The model combines ontology to describe the specific domain of interest and decision–making mechanisms based on Bayesian Networks (BN) to enable the work of a single robot without human intervention by learning Behavioral Patterns (BP) of other robots in the group.
A Precise Automatic Assembly System for Fabrication of Complex Miniature Products
Authors: Zhang Xi Wen , Wang Xiao Dong , Luo Yi , Teng Lin , Chen Liang , Ma Tian Ming
Published: August 2011

Assembly is one of the most important procedure in manufacturing complex miniature products. Batch assembly is limited by the manual manipulation, for which specially trained technicians is required. In order to automatically assembly certain complex miniature products consisting of multiple parts with different shape and various dimension, and also to reduce the production cost and improve efficiency, an assembly system was developed. Hardware architecture of the system was discussed in detail. Measurement and control strategies in assembling procedure were presented. Local feature extraction and fitting algorithms, reference datum setting were applied to overcome the occlusion. Linear and circular feature fitting from multiple local images of parts, coordinate transformation and the compensation of stages assembly error angle among three local coordinates were adopted to improve the measuring accuracy of vision system. Microscale force sensor was introduced to control the contact force, and the accuracy obtained is less than 1mN. Torque sensor was adopted for sensing the torque during the screw thread assembling, stepping motor and flexible coupler were applied to make the torque smoothly transferred, all of which help precisely measuring and controlling the torque during the M1.4 screw thread assembly.
Dynamic Analysis of Multi-Legged Walking Robot’s Swing Leg with Hand-Foot-Integration Function
Authors: Wang Xin Jie , Zhang Xiao Hui , Wang Liang Wen , Zhang Duan Qin , Wei Bo
Published: August 2011

In this paper, the structure and the motion state of a new type multi-legged walking robot with hand-foot-integration function is introduced, and its swing leg which has hand-foot-integration function is analyzed in detail. Firstly, the kinematics relation of the swing leg is researched, then the velocity and accelerated velocity expression of the swing leg is derived. And then, the dynamics of the swing leg in the state of grasping objects with considering the gravity effect is researched by using Newton-Euler method. The relevant formula is deduced in this paper. Finally, the analysis process is verified through a numerical example.
A Practical Method for Circular Hole Measurement Based on Machine Vision
Authors: Jin Yan , Zhou Yong Liang , Chen Biao
Published: August 2011

Non-contact Measurement of circular hole, which based on machine vision is already used for industrial applications. In this paper, a novel practical method to obtain parameters of a circular hole from an image is presented. The main idea of the proposed method is that we use gradient information to find a region that contains possible centers of the circle (the hole) and use evidence-collecting process to obtain the reasonable radius. This method fits the situation that the hole object in a image is totally brighter or darker than its background. Experimental results demonstrate that our method can detect the hole with the acceptable precision and stability for practical applications.
Research on an Image-Based Visual Positioning System in the PDP Lighting Inspection Machine
Authors: Yang Lei , Liu Gui Xi , Chang Peng Ju
Published: August 2011

Visual positioning system is of great importance in the structure of PDP lighting inspection machine. This paper describes the overall structure of the system, the process of the interaction with the PLC system, the hard structure and continuous positioning principle. A point correspondence method is also studied.
The Finite Ridgelet Transform for Defeat Detection of Quill
Authors: Liu Hong Jiang , Wang Ren Huang , Ming Jun Feng , Li Xue Cong
Published: August 2011

A defeat detection method for quill using the finite ridgelet transform is mentioned. This method reduce the average gray values of quill and analytic statistics methods are used in ridgelet transform according to points of quill. After ridgelet transform the linear singularity is further highlighted and the quantization errors caused by cutting image of quill is overcomed. With this method the differences between background and quill are eliminated too and automaticly adjusting the sub-image size for transformation according to the width of quill is realized. The experiment results show that this method can effectively detect smaller linear defects and hence satisfy the industrial production needs.
Inspection and Grading of Surface Defects of Fruits by Computer Vision
Authors: Li Jiang Bo , Rao Xiu Qin , Ying Yi Bin
Published: August 2011

Computer vision is a rapid, consistent and objective inspection technique, which has expanded into many diverse industries. Its speed and accuracy provide one alternative for an automated, non-destructive and cost-effective technique to accomplish ever-increasing production and quality requirements. This method of inspection has found applications in the agricultural industry, including the inspection and grading of fruits. This paper provides an introduction to main defection and grading approaches of fruit external defects, including image processing and pattern recognition methods based on fruit two-dimensional (2D) and three-dimensional (3D) information, and hyperspectral and multispectral imaging. In addition, their advantages and disadvantages are also discussed.
Study on Microstructure and Property of Cast Aluminum from the Reaction of New SHS Aluminum Welding Powder
Authors: Xiong Yan Ping
Published: August 2011

This paper provides a new method of producing molten weld metal for use in joining two aluminum containing pieces by using the reaction of aluminum and calcium sulfate. First we confected SHS aluminum welding powder including Al, CaSO4, KF, KClO3, Cu and Si, then ignited it and obtained the cast aluminum. Afterwards, we observed the samples of the cast aluminum under a metallographic microscope and tested their hardness with a micro hardness tester. The experimental results demonstrate that aluminum and calcium sulfate can react to get cast aluminum and the microstructure and property of the cast aluminum substantially meet the need to weld aluminum and its alloy.
An Approach for Modeling Transformation Plasticity Using a Phase Field Model
Authors: Uehara Takuya
Published: August 2011

In this paper, an approach for modeling transformation plasticity using a phase field model is presented. A conventional formula is utilized to represent the strain due to transformation plasticity as well as thermal expansion and transformation dilatation. A phase-field variable is introduced to express the state of phase in material instead of volume fraction, and numerical simulations under simplified conditions are demonstrated. As a result, the strain induced by phase transformation is suitably regenerated, and qualitatively appropriate temperature-strain curves are obtained. In addition, the effect of each parameter is investigated, and various dependencies, such as transformation temperature and stress, on the induced strain are demonstrated. It is then concluded that the results indicate the applicability of the presented model for practical use by adjusting the parameters.
Experiment and Analysis of Dielectric EAP Electrical Model
Authors: Zhang Xia , Wang Li , Wang Hua Ming
Published: August 2011

Energy harvesting using Dielectric Electroactive Polymer (DEAP) is an interesting possibility to convert mechnical energy to electrical energy. The fundamental of generator mode of DEAP is first described, and then an equivalent RC electrical model for the DEAP generator is given. Based on the RC model, we analyze the relationship between the electrical model parameters and the influencing factors, and then get their theoretical formulas. In the experiment, the annular type DEAP generator unit is used. Using the discharging method, the experimental data about the electrical parameters influenced by the applied voltage and the axial displacement are obtained respectively. We modify the theoretical formulas based on the experimental data. The modified formuals can serve as a significant guide for energy conversion and generator design using dielectric elastomer.
Chen's Lattice Inversion Embedded-Atom Method for FCC Metal
Authors: Zhang Chuan Hui , Han Jia Jia , Huang Shuo , Shen Jiang
Published: August 2011

We explored a new type EAM potential (CLI-EAM) that the value of atomic electron density and pair potential functions are obtained by Chen’s lattice inversion based on first-principles calculations. This EAM potential is applied to Cu, Ag, Cu and Pt metals successfully and the results of basic properties agreed with the experiments. For the same metal, the cohesive energy of fcc structures are the lower than bcc structures.
A Study on Rotary Expanding Process of Large-Diameter Hot-Rolled Seamless Gas Cylinder with Finite Element Analysis
Authors: Jin Shun Yao , Huang Zhong Guo , Shao Zong Ke , Yuan Qing Hua , Wei Jian
Published: August 2011

This paper expounds the application of rotary expanding process to manufacture the large-diameter hot-rolled seamless gas cylinder. 3D drawing software CATIA-V5 is applied to build 3d models of steel tube and rolling tools. Deformation feature of rotary expanding process is analyzed by using MSC.Marc FEA (finite element analysis) software to simulate the rolling process. As a result, it provides a scientific theory for optimizing the rotary expanding process and improving the quality of steel tube. It proposes a novel method to calculate the wall thickness uniformity after finite element analysis. Marc’s second development function and FORTRAN software’s extracting finite element node coordinates function are applied to calculate the wall thickness uniformity. The rotary expanding process can control the wall thickness uniformity well. The wall thickness uniformity of steel tube after rolling is simulated well by using MSC.Marc FEA software, which can help the technologist to predict the influence of wall thickness uniformity owing to the change of process design, and to provide guidance for production.
Pre-Heating Storage Design of Solar Heating System Based on SVM
Authors: Cai Zhi Duan , He Wu Ming , Wang Pei Liang , Cai Shou Jiang
Published: August 2011

The heating model of pre-heating storage in advance during the valley period of electricity is proposed to solve the intermittent heating problem brought by large solar heating systems affected by change in climate and day and night or other factors. Aiming at best energy saving and the capability of continues heating of solar heating system, the SVM is applied to predict the start time, the highest temperature, the volume of water and other key parameters of the model. The solar heating system apply the pre-heating storage control model that has been trained to meet the practical requirements of different consumers and climate in the application process. Experimental results show that the pre-heating storage model can improve the energy efficiency of large solar heating system and the capacity of real-time continuous heating. The article provides a new control model with large-scale solar heating system.
Modeling and Optimizationof an Ultrasonic Setup Based on Combination of Finite Element Method and Mathematical Full Factorial Design
Authors: Ghahramani Nick Mohsen , Akbari J. , Movahhedy Mohamad.R. , Hoseini S.Mehdi
Published: August 2011

Ultrasonic assisted machining (UAM) is an efficient nontraditional machining operation for brittle, hard-to-cut and poor-machinability materials. In UAM, high frequency oscillation in ultrasonic range at low amplitude is imposed on the workpiece or cutting tool. In most cases, the equipments that generates and transfers the vibration, have a complicated structure, and requires significant effort to achieve their optimum function. In this work, a mathematical model is developed and an optimization method is employed for design process. This makes it possible to achieve proper setup and reduce the amount of calculation. For this purpose, the combination of a two level full factorial design is performed with data that are obtained from finite element model(FEM)are used. Based on the mathematical model, an objective function is defined with the objective of maximizing the vibration amplitude at longitudinal resonance frequency of 22 kHz. Genetic algorithm is used to optimize the design parameters according to the defined objective function. The obtained results are shown just an error about 0.03 percent between FEM modal analysis and mathematical model answer. The advantages of the proposed optimization method in ultrasonic setup design in case of complicated geometries is discussed. Therefore optimization methods via FEM data could be regarded as an efficient approach for design of complicated structures.
Detection of Defect on Navel Orange Using Hyperspectral Reflectance Image
Authors: Li Jing , Xue Long , Liu Mu Hua , Wang Xiao , Luo Chun Sheng
Published: August 2011

A hyperspectral imaging system for detecting defect on navel orange was demonstrated. The hyperspectral imaging system, which was a line-scan imaging system, consisted of a hyperspectral camera, a halogen lighting unit, a computer and a translation stage. The imaging system operated from 400 to 1000nm. Principal component analysis (PCA) was performed using the hyperspectral images data (from 500 to 700nm); 2nd principal component (PC) image exhibited differential responses between normal and defect spots on the surface of navel orange. The combined use of the PC-2 images demonstrated the detection of defect spots with minimal false positives. Based on the PC-2 weighing coefficients, the dominant wavelengths were 528,529,530,673,674 and 675nm. This research demonstrated the potential of multispectral image for online applications for detection of defect on navel oranges.
Analysis on the Contribution of Technical Progress to the Output Growth of Intelligent Materials Industry in China
Authors: Zhang Jian Sheng
Published: August 2011

By the panel data method, this paper gave an analysis on the capital, labor and output of 28 listed intelligent materials enterprises with C-D function from the year of 2004 to 2008. The research results showed that the elasticity sum of labour and capital output in China is 1.12009, which explained the intelligent material industry was in scale increasing remuneration stage; in recent years, intelligent technical efficiency has brought the enlargement of labor and capital production, and the expanded capacity has been increasing year by year. The technical efficiency difference of listed company was also great, and the contribution of technological progress on output growth also had a significant gap.
An Intelligent Remote-Controlled LEGO ROBOT with TETRIX Metal Material Bricks
Authors: Chen Wen Ping , Hsieh Shan Chih , Chen Song Shyong , Chang Wei Ting
Published: August 2011

LEGO MINDSTORMS NXT is a popular system for learning robot science, but the way of remote control and carrying capacity is limited by connection wire length and plastics bricks. This study is to design an intelligent wireless controller that can connect with it. Connecting with touch sensor, accelerometer and gyroscope, the controller can sense the user motion in the three dimensions and then transmit sensor data to it through ZigBee network to drive it. Besides, the weak robot structure of LEGO bricks is strengthened by the TEERIX metal material bricks. The purpose of this research is to inspire the students’ interesting and enhance their applied ability of robot field.
Research on Dynamic Analysis Ability of STPS for Non-Stationary Noise of Ceramic Paste Inner Stress
Authors: Zhou Qiang , Yang Bo , Li Jing Yu , Zhang Gang Qiang
Published: August 2011

At present, the dynamic analysis for non-stationary stochastic noise of ceramic paste inner stress is a difficult problem because a non-stationary stochastic noise has a time variant model and dynamic characteristics. In this paper, dynamic analysis ability of Short Time Power Spectrum (STPS) was systematically studied and improved in accordance with theoretical research and simulation analysis. The pressure signals between ceramic paste and head inwall of vacuum pug mill were studied so as to obtain the distribution of the ceramic paste inner stress. Experiments about the pressure signals had been carried out to verify the research result. Theoretical analysis and experimental result shows that: STPS with filtering performs well in analyzing non-stationary stochastic noise of ceramic paste inner stress in mutation situation.
Particle Swarm Optimization MPPT Method for PV Materials in Partial Shading
Authors: Liu Chun Xia , Liu Li Qun
Published: August 2011

Today, the large-scale Photovoltaic (PV) power system, connected to grid, is in their advanced development stage and is extremely interest in whole world. The real large-scale PV array can be partially shaded by the shadow of building, cloud, bird and dirt. The output characteristic of PV materials in partially shaded conditions is strong nonlinear, and there are multi local peaks in output power voltage curve, and the only one real peak exists in these local peaks. Certainly, the maximum power point tracking (MPPT) method is very important to extract the as much as possible energy from the costly PV materials. The variant weight Particle Swarm Optimization (PSO) method is proposed to track the real peak by using the excellent multi-peak value optimization characteristic of PSO algorithm. The simulation results shows that the proposed PSO method can improve the response speed and output efficiency of PV materials in partial shading as compared to the conventional Incremental conductance (IC) method.
In Situ Remediation Technology of Groundwater Contaminated by Petroleum Contaminants
Authors: Yu Shu Bin , Ma Zhen Min , Zhang Hui Shen
Published: August 2011

The paper presents concepts of permeable reactive wall, groundwater aeration, in-situ chemical oxidation, in-situ electrokinetic remediation, bioremediation, and the progress of their researches are discussed. Situ remediation of petroleum contaminants in groundwater proposed a variety of technologies should combine to improve the repair efficiency and reduce capital investment.
Relationship between the Tensile Property of the SPF-PVA/Polyester Blended Yarn and the Blended Ratio of SPF-PVA
Authors: Yang Qing Bin
Published: August 2011

In order to analysis the relationship between the strength and elongation and the blended ratio of SPF-PVA/polyester blended yarn, the strength and elongation of SPF-PVA/polyester blended yarn with different blended ratio were measured and compared with the simple model. The results indicated that the tendency of the strength of the SPF-PVA/polyester blended yarn with the blended ratio is agreeable with the model, however the experimental results are higher than that of the model.
Preparing Fatty Acid by Hydrolysing Waste Oil from Restaurants under Normal Pressure
Authors: Wang Chang Mei , Zhang Wu Di , Zhou Xiao Qing , Chen Yu Bao , Yin Fang , Li Jian Chang , Xu Rui , Liu Shi Qing
Published: August 2011

[Objective] The research aimed to take the waste oil from restaurants as raw material for hydrolysis preparation of fatty acid atmospheric pressure.[Method] Fatty acid was produced by hydrolysis of waste oil from restaurants under normal pressure at the temperature of(95±5)°C.Effects of ratio of oil to water, amount of catalyst, emulsification and time on hydrolysis reaction were studied.[Results] The optimal parameter was as follows:amount of emulsification 3％.amount of catalyst 15％, weight ratio of oil to water l:3，hydrolysis time at 15 h.Under the conditions.the acid value of hydrolyzed Waste Oil from Restaurants reached 173.3 mg/g．[Conclusions] The fatty acids which were commonly used in industry could be produced under normal pressure by hydrolyzing the rapeseed oil.And the conversion rate could reach 92.8％.In this paper, the results are same as that of similar reports. So used waste oil from restaurants as raw material and SDBS as emulsifier to prepare fatty acid under normal pressure is a feasible method.
The Effect of 1,10-Phenanthroline on the Luminescent Properties of Eu (III) and Tb (III) Complexes with 2-Acetylnaphthol-Hydrazinehydrate
Authors: Feng Yi Min
Published: August 2011

Four complexes have been prepared by reaction of rare earth nitrates with 2-acetylnaphthol-hydrazinehydrate (ANH) and phenanthroline. The complexes were characterized by IR spectra. The fluorescent properties of the europium and terbium complexes in solid and in DMSO solution were investigated and the effects of phenanthroline on the luminescent intensity of europium and terbium complexes also were studied. The results show that the europium and terbium ions formed stable complexes by coordinating to the nitrogen atoms and oxygen atoms of the ligands and the nitrates. And the complexes exhibited maximum fluorescence emissions in blue region.
Fuzzy PID Temperature Control in Manufacturing Engineering
Authors: Huang Fei , Luo Yi , Yao Yi
Published: August 2011

This paper introduces the basic concept of fuzzy PID in manufacturing engineering, and the system of temperature control is analyzed, and the temperature is designed with correction factor and the optimized parameters with the application of the fuzzy general MATLAB in simulink toolbox, the temperature is designed by comparing fuzzy PID output with raditional output, the system has the characteristic of quick response, short setting time, small overshoots, and high control precision.
Application of DNA Genetic Algorithm in Manufacturing System Scheduling Optimization
Authors: Nie Shu Zhi , Ye Bang Yan
Published: August 2011

In this paper, built mathematical model on Flow Shop scheduling, put forward a RNA genetic algorithm based on DNA computing to solve the Flow Shop scheduling problems. Adopt RNA four digit system encoding method based on DNA computing and RNA computing operator in genetic algorithm. It resolved the encoding scheme and convergence problem which exists in the conventional genetic algorithm. Under some constraint conditions, this genetic algorithm got simulated. Simulation results showed that this algorithm has a better optimum searching and seeking abilities, made the scheduling results comparatively reasonable and expanded the application of DNA computing.
Recombination Activity of Twin Boundaries in Silicon Ribbons
Authors: Yakimov Eugene B. , Feklisova Olga V. , Brantov Sergei K.
Published: August 2011

Investigations of silicon layers grown on carbon foil were carried out using the Electron Beam Induced Current (EBIC) methods. The most of grain boundaries in these ribbons are (111) twin boundaries elongated along the direction. The EBIC measurements showed that the recombination contrast of dislocations and of the most part of twin boundaries at room temperature is practically absent and only random grain boundaries and very small part of twin boundaries produce a noticeable contrast. At lower temperatures a number of electrically active twin boundaries increases but the most part of them remains inactive. A contamination with iron increases the recombination activity of random boundaries but not the activity of twin boundaries.
The Nature of Lifetime-Degrading Boron-Oxygen Centres Revealed by Comparison of P-Type and N-Type Silicon
Authors: Voronkov Vladimir V. , Falster Robert , Bothe Karsten , Lim Bianca , Schmidt Jan
Published: August 2011

Illumination-induced degradation of minority carrier lifetime was studied in n-type Czochralski silicon co-doped with phosphorus and boron. The recombination centre that emerges is found to be identical to the fast-stage centre (FRC) known for p-Si where it is produced at a rate proportional to the squared hole concentration, p2. Since holes in n-Si are excess carriers of a relatively low concentration, the time scale of FRC generation in n-Si is increased by several orders of magnitude. The generation kinetics is non-linear, due to the dependence of p on the concentration of FRC and this non-linearity is well reproduced by simulations. The injection level dependence of the lifetime shows that FRC exists in 3 charge states (-1, 0, +1) possessing 2 energy levels. The recombination is controlled by both levels. The proper identification of FRC is a BsO2 complex of a substitutional boron and an oxygen dimer. The nature of the major lifetime-degrading centre in n-Si is thus different from that in p-Si - where the dominant one (a slow-stage centre, SRC) was found to be BiO2 – a complex involving an interstitial boron.
Low-Temperature Diffusion of Transition Metals at the Presence of Radiation Defects in Silicon
Authors: Vobecký Jan , Komarnitskyy Volodymyr , Záhlava Vít , Hazdra Pavel
Published: August 2011

Low-temperature diffusion of Cr, Mo, Ni, Pd, Pt, and V in silicon diodes is compared in the range 450 - 800 oC. Before the diffusion, the diodes were implanted with high-energy He2+ to assess, if the radiation defects enhance the concentration of metal atoms at electrically active sites and what is the application potential for carrier lifetime control. The devices were characterized using AES, XPS, DLTS, OCVD carrier lifetime and diode electrical parameters. The metal atoms are divided into two groups. The Pt, Pd and V form deep levels in increased extent at the presence of radiation defects above 600 oC, which reduces the excess carrier lifetime. It is shown as a special case that the co-diffusion of Ni and V from a NiV surface layer results fully in the concentration enhancement of the V atoms. The enhancement of the acceptor level V-/0 (EC 0.203 eV) and donor level V0/+ (EC 0.442 eV) resembles the behavior of substitutional Pts. The second group is represented by the Mo and Cr. They easily form oxides, which can make their diffusion into a bulk more difficult or impossible. Only a slight enhancement of the Cr-related deep levels by the radiation defects has been found above 700 oC.
Reconstruction of a High Angle Tilt (110)/(001) Boundary in Si Using O-lattice Theory
Authors: Cherkashin Nikolay , Kononchuk Oleg , Hÿtch Martin
Published: August 2011

High angle close to 90° tilt Si boundary created by direct wafer bonding (DWB) using SmartCut® technology is studied in this work. Experimental identification of defects and morphologies at the interface is realized using conventional transmission electron microscopy (TEM) and geometric phase analysis (GPA) of high-resolution TEM images. Atom reconstruction of the interface along the direction is carried out within the frame of the O-lattice theory. We demonstrate that to preserve covalent bonding across the interface it should consist of facets intersected by a maximum of six planes with three 90° Shockley dislocations per facet. For a long enough interface the formation of Frank dislocations is predicted with a period equal 6 times that of Shockley dislocations. Long range undulations of the interface are shown to be related directly to a deviation from exact 90° tilt of the layer with respect to the substrate.
Homogeneous and Heterogeneous Nucleation of Oxygen in Si-CZ
Authors: Kubena Josef , Kubena Alan , Caha Ondřej , Meduna Mojmir
Published: August 2011

We present numerical simulations of nucleation kinetics of vacancies and interstitials during RTA and we study the impact of annealing temperature on bulk micro defect concentration. Since the concentration of vacancies and oxygen and also its diffusion kinetics are significantly different inside Czochralski silicon, we assume the nucleation of vacancies and oxygen independent on each other. We show that different populations of voids formed during RTA can influence formation of oxygen precipitate nuclei. According to classical nucleation theory the homogeneous nucleation dominates around temperatures 500 °C while the calculation of oxygen diffusion into the voids shows that the oxygen clusters over the critical size can be formed above temperatures 700 °C. The nuclei concentration of BMD is thus the superposition of homogeneous nucleation below 700 °C and heterogeneous one prevailing above 700 °C.