bluuebunny/crossref_metadata_2025 huggingface dataset:
De Algorithm Optimization Design Research and Numerical Simulation of a New Optical Fiber F-P Sensing System
Authors: Shan Ning , Liu Tuan Jie
Published: June 2013

Optical fiber F-P sensor has several advantages, such as strong anti-interference ability, quick speed and high precision. It is widely applied in detecting fields. But optical fiber F-P sensor deviates from working point easily in practical applications, it leads to output signal attenuation and the decreasing of signal noise ratio. The double wavelength optical fiber F-P sensing system is designed to solve the problem. DE algorithm mathematical model of sensing system is established, meanwhile, a higher orthogonal precision sensing system is optimization designed. The orthogonal error of sensing system is studied. The results show that DE algorithm is correct and reliable. Its run time is shorter and the error is less than 10-3. The optimization objective decreases sharply. When the length of F-P cavity changes 0~2500nm, the orthogonal error of sensing system is less than 5%. It has higher stability and anti-interference ability. These results show that the DE algorithm can be used for the structural optimization design of optical fiber F-P sensor.
Adaptive Rejection of Unmatched General Periodic Disturbances by Dynamic Output Feedback
Authors: Chen Peng Nian
Published: June 2013

The paper considers rejection of unmatched general periodic disturbances with time-varying gains for a class of nonlinear systems. The period of the periodic disturbances is known, the gains of the disturbances depend on the output of the system, and the coefficient vector of the disturbance input channel is not assumed to be a Hurwitz vector. A novel filtered transformation is presented. Based on the filtered transformation, an adaptive output feedback control law is proposed, which guarantees that the output of the closed loop system converges to zero.
Development of Building Material Monitoring and Management System Based on W5200 and C8051F060
Authors: Feng Zhi Gang , Dai Fang Yuan , Yang He
Published: June 2013

In this paper, an universal building material monitoring and management system is designed based on C8051F060 SOC and W5200. In the hardware section, the general characteristics of C8051F060 and W5200 is described, the system architecture of management system for monitoring of building materials is represented, the hardware circuit design of the measurement system is described in detail, a problem frequently encountered in using W5200 is elaborated and a feasible solution is given. In the software part, the data acquisition software on the C8051F060 MCU and the monitoring and management software on the host PC are introduced. The implemented system has many functions, including parameter calibration, data acquisition, data display, data transfer and so on.
The Measure and Control System Design for Temperature and Humidity in General Storeroom
Authors: Huang Kun , Wang Li Hua , Hao Xiao Jiang
Published: June 2013

Based on the STC89C52 MCU as the core, this paper designs the measure and control system for temperature and humidity in general storeroom. The system includes two parts: hardware circuits design and software design. The hardware circuits include MCU smallest system, temperature and humidity signal acquisition circuit, keyboard circuit, LCD display circuit, control circuit and alarm circuit; the software includes main program and subroutines (temperature and humidity setting, acquisition, display and overrun processing, etc.). Through system function debugging, the system can realize the temperature and humidity information acquisition, display and control.
Apple Grading Using Principal Component Analysis and Kernel Fisher Discriminant Analysis Combined with NIR Spectroscopy
Authors: Wu Xiao Hong , Xu Wen Jie , Wu Bin , Qiu Sheng Wei
Published: June 2013

Principal component analysis (PCA) and kernel Fisher discriminant analysis (KFDA) were applied to grade Fuji apples combined with near infrared reflectance (NIR) spectroscopy. Firstly, PCA was used to reduce the dimensionality of NIR spectra acquired by the Antaris II FT-NIR spectrophotometer on apples. Secondly, nonlinear discriminant information was extracted by kernel Fisher discriminant analysis (KFDA). Finally, the k-nearest neighbors algorithm with leave one out strategy was utilized to classify apple samples into two grades. LDA can only solve linearly separable problems, and it is not suitable in solving some nonlinear problems. But unlike LDA, KFDA can solve nonlinearly separable problems, and it projects data onto a high-dimensional feature space by the nonlinear mapping. Experimental results showed that KFDA achieved higher classification rate compared with LDA.
The Ontology-Based Medical CT Image Semantic Retrieval System
Authors: Zhang Teng , He Feng , Tan Peng
Published: June 2013

With the development of multimedia technology, the medical CT images become more important in the process of diagnostic cases, at the same time, how to retrieve the medical images that we need becomes more and more important. Usually, images could be got precisely but not intelligently using database. Therefore, this paper, taking advantages of both ontology and data structure of the medical image, introduces a semantic retrieval system programmed by Java and helps to achieve the intelligent retrieval of medical CT images and provides better reference pictures to the doctors.
Three-Step Iterative Method for Completely Generalized Set-Valued Strongly Nonlinear Quasi-Variational Inclusions
Authors: Fang Bao Di
Published: June 2013

In this paper, we introduce and study a new class of completely generalized set-valued strongly nonlinear variational inclusions in Hilbert spaces and establish the equivalence between this variational inclusion and the fixed-point problem by using the resolvent operator technique for maximal monotone mapping. We construct a new three-step iterative algorithm and show the existence of solution for this variational inclusion and the convergence of the iterative method generated by the iterative method.
A New Super-Resolution Reconstruction Algorithm Based on Block Sparse Representation
Authors: Zhao Xiao Dong , Cao Jian Zhong , Zhang Hui , Liu Guang Sen , Wang Hua , Liu Qing
Published: June 2013

In this paper, we propose a new single super-resolution (SR) reconstruction algorithm via block sparse representation and regularization constraint. Firstly, discrete K-L transform is used to learn compression sub-dictionary according to the specific image block. Combined with threshold choice of training data, the transform bases are generated adaptively corresponding to the sparse domain. Secondly, Non-local Self-similarity (NLSS) regularization term is introduced into sparse reconstruction objective function as a prior knowledge to optimize reconstruction result. Simulation results validate that the proposed algorithm achieves much better results in PSNR and SSIM. It can both enhance edge and suppress noise effectively, which proves better robustness.
The Research of Infrared Image Generation Method Based on the OGRE
Authors: Mu Cheng Po , Zhang Xian Lei , Han Chao , Wang Ji Yuan
Published: June 2013

Infrared thermal imaging technology in various fields has been widely used. This paper firstly sets up the three-dimensional targets infrared radiation models and the atmospheric transmission model, and then generates the associated radiation data; Secondly building target 3D geometric model, the radiation data is mapped to the three-dimensional model, target in the 3D space is reconstructed of the infrared radiation characteristics; Finally it is using OGRE image engine rendering technology and GPU programmable pipeline technology that generate the target infrared image. This will have important significance to the next step to construct complex infrared scene.
The Application of Modified BP Neural Network Method to the Evaluation of the Quality of Teaching
Authors: Song Rong , Liu Tao
Published: June 2013

Modified BP neural network method was used to solve the problem of teaching quality evaluation. The neural network was built to fit the function relationship between the second-floor indicator and teaching quality evaluation. So quality teaching evaluation could be implemented. At first, the theory of BP neural network method was introduced, then, students` evaluation of the secondary indicators was taken as inputs, and scores from the Steering Group as output, and 20 lessons scores as researched data, and then, calculating characters of BP method were analyzed. The calculating result showed that the calculation results of the method have the stability, its feasibility was proved. After that, the optimized calculating method was used to optimize result. The calculation results showed that the method had high accuracy, and predictive value calculation error was less than 2.02%, and it verified the feasibility of the method.
Palm Vein Recognition Algorithm Using Curvelet and Wavelet
Authors: Jiu Zhi Xian , Li Qiang
Published: June 2013

In this paper we report on a curvelet and wavelet based palm vein recognition algorithm. Using our palm vein image database, we employed minimum distance classifier to test the performance of the system. Experimental results show that the algorithm based on cuvelet transform can reach equal error rate of 1.7%, and the algorithm based on wavelet transform can only reach equal error rate of 2.3%, indicating that the curvelet based palm vein recognition system improves representation.
Designing and Implementation of 2D Character Barcode
Authors: Liu Zhi , Feng Xiao Fei , Xu Cai Hong
Published: June 2013

Base on 2D barcode DM and QR, a new2D character barcode, is proposed in this paper. It is different with the traditional 2D barcode. It is a character matrix instead of the image barcode. The encoding rules, decoding rules and symbol structure of this character barcode are designed and implemented. Then the error-correcting code is studied and added into the encoded information. Finally the 2D character barcode is verified on PC. The experiments show that the 2D character barcode has very small capacity and can be transmitted as the character message among the mobile terminals. It can well overcome high loss rate when the image of 2D barcode is transmitted as a multimedia message and avoid the problem that some mobile terminals can not support the multimedia messages.
Study on Moving Object Detection Based on RGB Color Model
Authors: Liu Chun Yang , Hou Dao Zheng , Liu Chang An
Published: June 2013

The traditional background difference method is based on gray image. Some information is lost when color image is transformed into gray image. So it is difficult to discriminate different colors with similar gray values and easily disturbed by noise and shadows. In this paper, the background difference is based on RGB color model. It is proposed to use the average value of each pixel of the color image sequences to extract the background, and then use the three-dimensional color values of the current frame and background image to compute the difference to detect the moving objects. The proposed approach is simple and easy to implement. The experimental results show that it is more sensitive to colors and has higher accuracy and robustness than the traditional background difference method. Besides, it is more resistant to shadows.
Multi Algorithm in CFD Software and its Application to Numerical Simulation of 2D Regular Wave
Authors: Li Han Wu , Yang Tao
Published: June 2013

Fluent is a popular CFD software package now, it can model complicated fluxion question from incondensability to the highly condensability. This article compares and analyzes the advantages and disadvantages of several algorithms which used by the commercial software Fluent. It is must be determined the model accordance to the actual situation in a number of algorithm. Accordance to compared, the standard k-e model is used to simulate the regular wave in flume. The simulation results well reflect the characteristics of the regular waves, agreed well with theoretical value.
Research of Alloy Orb on a New Immune Genetic Algorithm
Authors: Zhang Shu
Published: June 2013

The standard Genetic Algorithm has several limitations when dealing with dynamic environments. The most harmful limitation as to do with the tendency for the large majority of the members of a population to convergence prematurely to a particular region of the search space, making thus difficult for the GA to find other solutions when changes in the environment occur. In order to avoid the premature convergence and the slow search efficiency at posterior evolutionary process of the traditional immune genetic algorithm, a new immune genetic algorithm is proposed. This algorithm uses orthogonal crossover to generate initial population and uses elitist-crossover to increase the good patterns of the population and uses hybrid mutation to increase the ability of local and global optimization. It has shown fascinating results when being used in the optimization of multimodal function.
A Method of Moving Object Tracking Based on Background Subtraction and Color Feature
Authors: Liu Chun Yang , Hou Dao Zheng , Liu Chang An
Published: June 2013

Background subtraction method is a tracking method only based on motion information. It cannot make a distinction between the foreground objects detected. The feature-based tracking methods need to select the appropriate prediction and search algorithm. But the algorithm complexity and amount of computation is large for the multi-target tracking. Therefore, this paper presents the method based on the combination of background subtraction and color feature. For improving the weak points of the traditional background subtraction method based on grayscale image, it is proposed to use the background subtraction based on RGB color difference. It improves the integrity of the foreground regions that makes better effect of the color feature matching. The experimental results show that in the multi-target tracking applications, the proposed method is simple and easy to implement. It can be used to track the targets with specific color feature and has high robustness.
On Computer Aided Formation Framework for Composite Material
Authors: Wang Juan , Lai Si Yu
Published: June 2013

The composite molding process design systems are developed on specific manufacturing resources or specific environment whenever at home and abroad, which enjoys a poor versatility. We built the system structure and flow for composite process integration framework after the computer-assisted resin transfer molding software has been developed. Then, studied the template-based data structure and established the model that can form a CAPP application system rapidly; developed a three levels similar cases retrieval structure based on part level, shape level and feature level; realized the customization of process card by adopting the excel template method. Finally, a resin transfer molding (RTM) process planning system is customized by object oriented programming (OOP) and component technique to verity the validity and feasibility of the integrating framework.
A Discussion about Value Management in Civil Engineering
Authors: Liu Yan Hong , Hu Guang Ling , Wang Qin Li
Published: June 2013

As one of the new management theory, the value management of civil engineering has gained much attention by a large number of scholars and has achieved some good results. However, civil engineering projects are particularly complex entities involving things such as social, physical, aesthetic and environmental factors, some of which offer unreasonable way of measuring the benefit and cost. There is an increasing demand for providing civil engineering products that satisfy customers' requirements and have relatively low life-cycle costs. Understanding of the relationship between the costs of civil engineering enterprises and the customers' value is the key to the ability of the enterprise to reach its maximum profit. This paper attempts to improve the theory of value management in civil engineering, some management strategies of value management for civil engineering enterprises are proposed.
Research on Coal Tar Pitch Based Needle Coke Production Quality
Authors: Zhou Xia Ping , Xu Dong Sheng , Zhang Pi Xiang , Yin Si Cong , Long Ju Xing , Hu Yong , Liu Liang Ping , Mao Ai Ping , Chen Yan Hua
Published: June 2013

The article developed a five-lump kinetic model for delayed coking through needle coke. The kinetic parameters were determined using the experimental results of the genetic algorithm method. The results showed the calculated concentration distribution agreed well with the experimental results. The results of five-lump kinetic model that composed of parallel and serial reactions and their activation energy also showed that the thermal sensitivity of coal tar pitch declined and that the orderly orientation strengthened under external magnetic field. This facilitates the formation of wide mesophase pitch structures in thermal conversion.
Optimization of Injection Process Parameters Based on Grey Theory
Authors: Cao Jiang Dong , Ding Jian Bo , Wang Lei Gang
Published: June 2013

Abstract. In this paper injection process for industry production is just a grey system which have problems of complex representation and discrete data. Orthogonal experiments have been designed to obtain the value of shrinkage and warp. The lower value of the two objects is better. After data obtained in experiments are dealt with by grey theory, relational degree had been calculated. With variance analysis the optimal level of the factors influencing the value of the two objects have been find out, then a optimal group of the process parameters has been obtained. Through simulation in computer, the warp is less than 0.5 mm, the shrinkage is less than 0.5%. The requirements of the product have been satisfied. In this method the factors had been considered before mould is tested comprehensively. Time and cost of product development have been decreased greatly. It is believed that the method is valuable in actual product.
Numerical Simulation and Analysis to the Behavior of Inner Hole Defect of Integral Top Cover for Pressure Vessel
Authors: Yu Zhao Qing , Nie Shao Min , Qi Shao Yin , Qi Rong Sheng , Liu Xin Gang , Jin Miao
Published: June 2013

The integral top cover for nuclear reactor pressure vessel is an important force component in the pressure vessel. It works under the HPHT and radiation long time, which increases forging difficultly and needs extremely high quality. Due to the effect of bi-directional tensile stress in spherical part during the shape forming stage of the integral top cover, it is easy to make holes and other defects of the blank extend. Then, it is necessary to study the behavior of the inner hole defect of integral top cover. This paper, by numerical simulation technology, concrete analyses the volume of the hole defect, the size of the hole defect and variation of the hole edges in the stress-strain fields during the shape forming stage of the integral top cover. It researches the control scope of the original size of blank holes when the integral top cover forging meet the requirements of the flaw detection. Research results show that, according to the requirements of volume and maximum size permissible value, the diameter of holes in the integral top cover blank should be respectively less than 1.8 mm, 1.5 mm.
Cutting Force, Temperature and Wear Behavior in Dry Machining of Nodular Cast Iron with Si3N4/TiC Micro-Nano-Composite Ceramic Tool
Authors: Lü Zhi Jie , Song Xian Chun , Ding Ming Feng , Zhou Yong Hui
Published: June 2013

In this paper, a type of Si3N4/TiC micro-nanocomposite ceramic tool materials were fabricated via hot pressing technique by adding Si3N4 and TiC nanoparticles. Cutting forces, temperature and wear behavior in dry machining of nodular cast iron with Si3N4/TiC micro-nanocomposite ceramic tool were investigated, in comparison with a commercial Sialon ceramic tool. Turning experiments were carried out at three different cutting speeds, which were 110, 175, and 220 m/min. Feed rate ( f ) and depth of cut (ap) were kept fixed at 0.1 mm/rev and 0.5 mm. The results show that the radial thrust force (Fy) become the largest among the three cutting force components (Fx , Fy and Fz), and Fy is the most sensitive to the changes of feed rate and depth of cut. In dry cutting of nodular cast iron, the cutting tool temperature rise rapidly with increase in cutting speed. The cutting temperature reach nearly 1000°C at the cutting speed of 220 m/min. The two types of ceramic tools have similar cutting performance, while the Si3N4/TiC micro-nanocomposite tool exhibits a better cutting performance than that of the Sialon tool. The wear rate of Si3N4/TiC micro-nanocomposite ceramic cutting tool is mainly dominated by the abrasion, while the wear rate of Sialon ceramic cutting tool is dominated by the abrasive action, and pullout of grains.
Weld Penetration in Orthotropic Steel Bridges
Authors: de Backer Hans , Outtier Amelie , van Bogaert Philippe
Published: June 2013

This paper reports the results of experimental research concerning the connection between the deck plate and the web of the longitudinal stiffeners in an orthotropic plated bridge deck on a microscopic scale. An important number of test specimens of a weld are studied with the help of a video microscope, to detect the efficiency of the root of the weld. The second part of the paper is concerned with parametric analysis of the lack of weld penetration by using accurate finite element modeling. The results demonstrate that the weld quality often required cannot always be assured, which surely has important consequence on the stresses in the weld and the fatigue resistance.
Study of Positioning Technology in Sonobuoy Networks Based on DV-Hop Algorithm
Authors: Hu Jin Hui , Hu Da Bin , Xiao Jian Bo
Published: June 2013

On the basis of analysis of sonobuoy using situation in the modern anti-warship warfare, wireless sensor networks with multiple sonobuoys are studied for detecting mission. The unknown nodes in the network are positioned by using of DV-Hop algorithm. The research results show that this method is practical and makes the network be self-organized and extensible.
Non-Traditional Controllers: Composite ABS/TCS for Wheeled Vehicle
Authors: Wang Ching Kuo , Chang Chang Hsin
Published: June 2013

Modern vehicle dynamics in its broadest sense encompasses all forms of vehicles. It aims to improve the riding comfort and the maneuverability for high-quality automobiles. This paper develops a sensor-based fuzzy controller (SFC) with a composite anti-lock braking system and tracking control system (ABS/TCS) to navigate escaping motions of wheeled vehicles under the assumption of Coulombs viscous friction and lumped-mass/rigid-body motions. The so-called escaping dynamics of wheeled vehicles occurs when the vehicle escapes from the constrained space during braking or cornering. Traditionally, such slippage phenomenon is usually ignored because of its high frequency and strong nonlinear features. The proposed SFC is designed to shorten braking distance under emergent circumstances and minimize cornering radius to improve maneuverability for wheeled vehicles. Finally, detailed simulations of wheeled vehicles with a composite ABS/TCS under the assumption of Coulombs viscous friction are used to justify the SFC algorithm.
Based on the Derivative and Retrieved Development of CAPP Tools System
Authors: Yuan Zhi Hua , Jiang Hong Li , Wang Xi
Published: June 2013

An idea of developing an integrated derivative and retrieved type of CAPP tool system is presented, and combined with a development practice, Making a CAPP system which has both practicality and versatility is still a problem to be solved. Aiming at this problem, the structure and some key technologies of the system is also introduced.
Dynamics Modeling and Resonance Analysis of Anti-Backlash Gear Transmission System Based on Harmonic Balance Method
Authors: Zheng Yang , Luo Zi Rong , Shang Jian Zhong , Wang Xiao Ming , Yu Nai Hui
Published: June 2013

Anti-backlash gear system is applied widely in precision mechanisms, and it is important to research its dynamic characteristics for improving the dynamic accuracy of system. The nonlinear dynamics equivalent model of an anti-backlash gear system in a servomechanism with time-varying mesh stiffness and gear side clearance is proposed. The dynamic transmission error of system is calculated by HBM and numerical computation method (NCM). Based on this, the effect of different parameters on resonance frequency of system is analyzed deeply. The results show that the resonance frequency is higher, when the mesh stiffness is increasing; proper preload force and gear side clearance can make the amplitude of resonance peak lower, which is useful to void more damages to mechanism when resonance comes up.
Research and Implementation of Search Engine Based on Lucene
Authors: Li Tong Qiang , Wang Peng
Published: June 2013

Currently,along with the rapid development of search engine and it towards the direction of the commercialization step by step, special search engine technology arises at the historic moment.In this article, according to the principlemodel and indexers of search engine tool of Lucene, we design a search engine system. In this system, a user can input a text in front of home page of this website, the system will use Ajax technology to match the search content automatically.And then it will show search results in the form list below the drop-down. At the same time we can click search, it will highlight the search content and display in jsp page. Actually,it has absoultely meaning in realistic.
Construct Concept Structure for Abstract Algebra
Authors: Yih Jeng Ming
Published: June 2013

Building relationship between conceptual knowledge and the procedures of mathematics contributes to long-term memory of procedures and to their effective use. So we know that symbols could enhance concept and procedures apply concepts to solve problem efficiently. The purpose of this study is to provide an integrated method of fuzzy theory basis for individualized concept structure analysis. This method integrates Fuzzy Logic Model of Perception (FLMP) and Interpretive Structural Modeling (ISM). The combined algorithm could analyze individualized concepts structure based on the comparisons with concept structure of expert.
Quality Assurance by the Error Cause Detecting Function in a Packet Switching System
Authors: Choi Ki Seok
Published: June 2013

Quality assurance method is required to guarantee the subscribers that their data are handled properly in a packet switching system. In order to achieve this requirement, if an error occurs in processing a packet call, the switch operator needs to find out what has caused it. In this paper, we propose a packet subscriber testing function and the error cause detecting methods which can analyze possible errors in the whole packet call handling process including call establishment, flow control parameter configuration, data transfer, reset, and call disconnection.
3D Reconstruction of Solid Rocket Motor Based on CT Images
Authors: Xu Zhi Gao , Ai Chun An , Ma Jing , Li Xiang Bin
Published: June 2013

A 3D visualization model of Solid Rocket Motor is established based on CT slice data using visualization toolkit. The 3D reconstruction system of flaw for Solid Rocket Motor is presented. The system has the function of volume rendering, surface rendering and slice showing for solid Rocket Motor. The results of tests show that vivid 3D internal defects images of Solid Rocket Motor are achieved. Technician can inspect details of internal defects from different angle of view and can quickly and exactly estimate the quality status of SRM. The detection efficiency is greatly improved.
Research on Social-Technical System for Project Oriented Collaborative Product Design
Authors: Hu Xiao Ping , Chu Chang Yong , Ye Hong Xian
Published: June 2013

Collaborative design of project oriented product involves not only the multidisciplinary knowledge synergy technology and cooperative managing technology of multiple design processes, but also the organization that puts the collaborative design into practice. Collaborative design is a complicate social-technology system which reflects product cognition process and the social relations of design teams. Based on the theory of systems engineering, a three dimensional description system of collaborative design is presented in this paper: disciplinary dimension, design process dimension and organization dimension. A spiral model of collaborative design process is proposed to express the reciprocity between disciplinary dimension and design process dimension. Design organization is viewed as the core of the social-technology system of collaborative design. The organization is depicted with class diagram. Researching collaborative design from the view point of socio-technical system, research field of design methodology is extended and it is beneficial to design methodologys guidance for complex product design, which also lays a solid foundation for further study on knowledge management in collaborative design.
Study on the Influence of Government Incentive Measures on Product Recovery Based on System Dynamics Simulation
Authors: Zong Xian Liang
Published: June 2013

An evolutionary game model between manufacturers is established to study the influence of government incentive measures for the EOL product recovery based on the assumption that all manufacturers have bounded rationality. Analysis on stable state shows that the evolutionary stable state does not always exist in the model. On the basis of this analysis, a system dynamics model is established to analyze the influence of the lowest recovery ratio and the fixed reward on the recovery behaviors of manufacturers by simulation. Simulation results illustrate that there exists a reasonable range of the lowest recovery ratio within which government incentive measures work well and the fixed reward can expand the width of the reasonable range. Any above or below the reasonable range of the lowest recovery ratio will invalidate government incentive measures. Government should enhance the degree of the lowest recovery ratio in the below situation, and provide manufacturers with greater amounts of reward for their product recovery actions in the above situation.
Simulation and Optimization for Household Electrical Appliances Production Logistics Based on Remanufacturing
Authors: Ou Da Yu , Shi Yu Qiang
Published: June 2013

Based on the remanufacturing idea, taking the CH Company for the research case, the forward and reverse logistics processes of the household electrical appliances were simulated and optimized systemically through Flexsim. Through method study technique, the process for recovery, dismantling and remanufacturing of waste TV were analyzed qualitatively and quantitatively and the model of production logistics system was built. From this model, the bottlenecks of the total logistics system can be identified, and the corresponding improved program and a comprehensive evaluation can be suggested reasonably. The results indicate that, based on the simulation in this work, the system technical indexes, such as T, Q, C and S, can be improved greatly by optimizing household electrical appliances remanufacturing production logistics system.
Application of Heuristic Genetic Algorithm for Parameters Optimization of a Solar Cell Manufacturing Process
Authors: Hou Tung Hsu , Lin Cecilia , Lin Keng Yu
Published: June 2013

The more rapid development of economy, the more resources demand. The developments of solar and other alternative energy are particularly urgent and important. Diffusion manufacturing processes is core process of a solar cell manufacturing process. The physical and chemical reactions with the corresponding product characteristics are non-linear. The processes cannot be amended effectively depend on engineers experiences. In order to find the optimal process parameters for the silicon solar cell diffusion process, this research proposed an approach which combines several methods: Revised Multi-objective genetic algorithms (RMOGA) and Adaptive Multi-objective genetic algorithms (AMOGA) that integrates back-propagation neural networks (BPN), technique for order preference by similarity to ideal solution (TOPSIS), and genetic algorithms (GA) with the concept of elite sets and local search. The result of this study shows that AMOGA has the best performance to enhance the breadth and depth of the MOGA search, and also quickly convergent to the high quality and quantity optimal solutions. That provides decision-makers more diverse choices.
The Bullwhip Effect in Supply Chain and Countermeasures
Authors: Chao Yu Fang
Published: June 2013

As supply chain involves a wide spread of enterprises, it is inevitable to have a bullwhip effect. The reason, why bullwhip effect occurs, includes such factors as demand forecast, delay in delivery, bulk orders and others. Bullwhip effect results increased inventory, differences in supply and demand, posing great risks on enterprise operation. To reducing the bullwhip effect in supply chains, such strategies as establishing an information-sharing platform, establishing strategic partnerships, direct ship and transit, stabling market demand fluctuations, should be taken, which will improve the competitiveness of enterprises in supply chain.
Preparation and Tribological Performace of Microcapsules of Butyl Stearate and Melamine-Formaldehyde Resin
Authors: Huang Yi Shen , Guan Ji Ju , Ma Guo Wei , Li Zhong Ya , Xu Xue Feng
Published: June 2013

With butyl stearate (BS) as the core material and melamine-formaldehyde resin (MF) as the wall material, BS-MF resin microcapsules were synthesized under in situ polymerization method. The microcapsules were characterized using FTIR, SEM and other methods. The four-ball friction method was performed to test the tribological property of the microcapsules when polyethylene glycol was taken as the base fluid. The results showed that base fluid with 3% microcapsules had a friction coefficient as small as 0.053 and the wear scar diameter could be 0.326mm (4%) under 314N. The microcapsules were ruptured under the action of friction and then the reactive group formed physical adsorption film. The physical adsorption film, together with the subsequently formed friction polyester film, presented a synergistic lubricating effect.
Preparation and Characterization of Novel Naturally Renewable Resin Acid Based Monomer
Authors: Yu Juan , Liu Yu Peng , Wang Chun Peng , Chen Ying , Wang Ji Fu , Chu Fu Xiang
Published: June 2013

Rosin, an abundant renewable natural resin obtained from exudation of pine trees, has attracted a great deal of attention because of its utilization as a feedstock for the preparation of polymers in the age of the depletion of fossil fuels. Dehydroabietic acid (DA) is one of important resin acid that could be produced with large scale and high purity. In this paper, we reported a new synthetic strategy to prepare a novel resin acid based monomer with acrylic group (DAHA) by sequential reaction of DA with 1,6-hexanediol and acryloyl chloride. The structure and properties of DAHA and DA monoester of 1,6-hexanediol (DAH), an intermediate compound, were characterized by FT-IR, 1H NMR, 13C NMR, MS, DSC and GPC. The results showed that DAHA has high purity and could undergo free radical polymerization. DAHA is a soft monomer with the glass transition temperature of-23.52 °C and can impart flexibility to the polymer integrated. This study illustrates a new synthetic strategy to prepare a new class of resin acid based monomer.
Deployment of Wireless Sensor Networks for Air Quality Monitoring
Authors: Wang Ming Wei , Wang Yue , Li Qiang Hua
Published: June 2013

At present, the effective technical means for air quality forecast and air pollution control is imperative for China environment utilities because of the increasing and serious environment pollution problems. In this paper, we discuss an air quality monitoring scenario which utilizes the wireless sensor network (WSN) to monitor the air quality of the transportation, industry and residential areas. Using the WSN, it is possible to deploy a large number of sensor nodes randomly distributed throughout the monitored area to capture environmental information of CO2, NO, NO2 and total suspended particulates. To achieve this goal, a special WSNs architecture is proposed, where the sensor nodes and coordinator nodes are designed by using ZigBee-based prototype wireless network, using GPRS to transmit the data from coordinator node to monitoring center, and designing the monitoring center server accessed from remote terminals through internet. In addition, the open source software (OSS) is proposed to design the database and website of the server. The designed air quality monitoring system reduces the cost of network installation and maintenance and provides a data delivery service for the air quality monitoring service in a timely and reliable manner.
Thermo Physical Properties of Copper/Diamond Composites Fabricated by Spark Plasma Sintering
Authors: Niazi Abdul Rehman , Li Shu Kui , Wang Ying Chun , Hu Zhi Yu , Zahid Usman
Published: June 2013

In modern electronic devices overheating has become a critical issue due to high power density and improved performance. In order to overcome this critical issue, the demands for materials having high thermal conductivity with low and tailorable coefficient of thermal expansions are required. This demand can be fulfilled by synthesizing copper/diamond composites, which show excellent thermo-physical properties, compatible with semiconductors and can be used in heat sink and thermal management applications. Copper/Diamond composites were fabricated by Spark Plasma Sintering Method (SPS) by electrolessly copper coated diamond particles pre coated with 1wt% Chromium. The prepared composites were investigated for various properties like thermal conductivity, thermal expansion and characterized by Scanning Electron Microscopy (S.E.M) and X-ray diffraction (X.R.D) analyses. The effect of process parameters were also taken into account. Thermal conductivity of copper/diamond composites fabricated by SPS at 1100°C under pressure of 40MPa, obtained in this case was 400 W/m•K , which is quite higher than those heat sink materials being already in use.
Design of Optimum Controller of APT Fine Tracking Control System
Authors: Li Ming Qiu , Jiang Shu Hua
Published: June 2013

APT (Acquisition, Pointing, and Tracking) system of space laser communication adopts compound axis structure; it consists of coarse tracking and fine tracking system. Its response speed and tracking precision mainly rests with the fine tracking system. Traditional PID control algorithm often is used in APT fine tracking system. In order to improve the dynamic performance of the system and decrease the tracking error, optimum control technology was adopted in this paper. On the basis of considering the system dynamic performance requirements and tracking precision requirement, optimum controller was designed. The simulation result shows that the bandwidth of APT fine tracking system is up to 1310 Hz, and the stable state error is less than 0.002. Compared with PID control, optimum control can improve the tracking performance of system.
Simulations on the Spare Parts Inventory Management of Equipment Maintenance in Manufacturing Enterprise Based on Flexsim
Authors: Sun Xue
Published: June 2013

In order to promote inventory management level, against the existing problem of spare parts management currently, the spare parts inventory management system of an enterprise engaged in casting and mechanical operations was studied. First, the simulation software Flexsim was used to model the original system. Then for the purpose of optimizing the system, ABC classification was proposed. According to the comparison of simulation results before and after optimization, optimized model can effectively improve the efficiency of inventory management. This can provide the reference of spare parts management for the other companies.
Laser Glazing of Peacock Blue Glaze on Porcelain
Authors: Wu Hua , Fan Ji Wei , Chao Ming Ju , Fu Lin Jie , Chen He
Published: June 2013

This paper presents the study of making peacock blue glaze surface by laser processing. The factors that may affect the quality of the glazed surface, especially the main laser processing parameters, were discussed. The structures and phase transitions of the glaze clad by laser were studied by X-ray diffraction, scanning electron microscopy and metallographic microscope. The color change and thermal stability of the glaze were tested. The results showed that the glazed surface clad by laser with a laser power of 25 W presented good visual characteristics. The color change of these glazed surfaces was inconspicuous with the increase in scanning speed. Several types of microcrystalline were also found in the glazed surface clad with a laser power of 25 W when the scanning speed was 10 mm/min. The glazed surface and the clay body were bonded tightly. The thermal stability of the glazed surfaces with good visual characteristics was also good.
Analysis and Assessment on Heavy Metal Contamination of Tuo River in Suzhou
Authors: Huang Shu Ling
Published: June 2013

River sediment is a basic composition part of water environment, the heavy metal content of which is usually taken as one of the important index for the water environment quality. Taking the water quality and sediment of the Tuo River in Suzhou in this article as the main research objects, the research on pollution of heavy metals was carried out. Along the river, it is divided into S, U, F, D, O five blocks from upstream to downstream, and each area was arranged 6 to 11 sampling points unequally. The content of heavy metals (P, Hg, Al, Fe, V, Cr, Co, Zn, and Cu) which existed in the water and sediment were tested and analyzed. Moreover, heavy metal pollution of Tuo river sediment was evaluated by the methods of Geoaccumulation index and Potential ecological risk assessment.
Process Design and Thermal Performance in Deep Drawing of SiCp/2024Al Composite Sheet Using Pulse Current Heating
Authors: Lai Xiao Ming , Wang Zhe , Zhang Yu Liang , Wang Bo , Zhang Kai Feng , Wang Guo Feng
Published: June 2013

The deep drawing of SiC/2024Al composites using pulse current heating were designed and established in this works. The whole process system mainly include pulse current heating system, electrode lifting system, temperature control system and deep drawing forming system. In addition, the feasibility of thermal deep drawing using pulse current heating was experimentally investigated and the optimal process parameters were explored to ensure defect-free products. The temperature of specimen is up to around 673K at a rate of 13.5K/s under the current density of 21.7A/mm2. The stainless steel inserts make temperature difference reducing by 73.3%. Moreover, the workpiece was successfully deep drawn and exhibited good surface quality. The dimensional accuracy achieved within ±0.2mm.
Application of Catastrophe Theory in Surrounding Rock Stability
Authors: Kong Din Ge , Hu Kai
Published: June 2013

Surrounding rock system of underground engineering is highly nonlinear, and there is no unified cognition for its stability criteria. Introduces the basic principle of catastrophe theory, focusing on the cusp catastrophic model, build a simplified mechanical model for the surrounding rock, and the instability of surrounding rock of the cusp catastrophic model is obtained. In practical engineering, it is show that catastrophe theory is an effective method to study the instability problem of the tunnel.
Application of Wavelet Parameters for Impact Damage Detection in Plates
Authors: Shelley T.J. , Liew Chin Kian
Published: June 2013

This study proposes a new nondestructive evaluation methodology named laser lock-in thermography (LLT) for fatigue crack detection. LLT utilizes a high power continuous wave (CW) laser as a heat generation source for lock-in thermography instead of commonly used flash and halogen lamps. The advantages of the proposed LLT method are that (1) the laser heat source can be positioned at an extended distance from a target structure thank to the directionality and low energy loss of the laser source, (2) thermal image degradation due to surrounding temperature disturbances can be minimized because of high temperature gradient generated by the laser source and (3) a large target surface can be inspected using a scanning laser heat source. The developed LLT system is composed of a modulated high power CW laser, galvanometer and infrared camera. Then, a holder exponent-based data processing algorithm is proposed for intuitive damage evaluation. The developed LLT is employed to detect a micro fatigue crack in a metal plate. The test result confirms that 5 μm (or smaller) fatigue crack in a dog-bone shape aluminum plate with a dimension of 400 x 140 x 3 mm3 can be detected.
Substructure Damage Detection Method for Shear Structure Using Sub-Time Series and ARMAX
Authors: Mei Liu , Mita Akira , Xing Zhen Hua
Published: June 2013

A local damage detection method for shear structure based on substructure approach and sub-time series superposition is proposed, which is promising for application in parallel and distributed damage detection systems. This method requires only three sensors to identify localized damage in any story of a building and it doesnt require constructing the structure models. A substructure method was used in this method to divide a complete structure into several substructures. Each substructure has a considerably smaller number of degrees of freedom (DOFs) which makes fewer requirements on the computing power of the data processing system. The algorithm is simple, which involves only algebra calculation and does not need any iterative computation. Moreover the damage detection process can be independently conducted on each substructure. Thus, this method is easy, efficient and suitable for being embedded into parallel and distributed damage detection systems. To better assess the performance of the method proposed above, experimental verification of the proposed approach has been conducted, which shows the proposed method works quite well and stably.
Single Transducer Pair Lamb Wave Time Reversal for Damage Detection in Composite Laminates
Authors: Normandin Benjamin , Veidt Martin
Published: June 2013

This paper investigates the potential of single transducer pair guided waves time reversal to detect damage in composite laminates. According to dynamic reciprocity of Lamb waves propagation in linear media, the time reversal process should reconstruct the original signal. The similarity of original and reconstructed time signals is calculated for different damage types using numerical and experimental studies with the aim to investigate, if the interaction of the wave pulse with inhomogeneities introduces any nonlinearity that time reversibility breaks down and single transducer pair time reversal could be used as damage diagnostics tool. 3D explicit finite element analysis is used for the numerical simulation and laser Doppler vibrometry is used to capture out-of-plane displacement time histories excited by an adhesively bonded piezoceramic transducer disc in the experimental time reversal process. In the case of an undamaged composite laminate the similarity index used to quantify the similarity of the original and reconstructed wave pulses is better than 95%. The similarity index is smaller for laminates with artificial damages including embedded fluoro polymer films to simulate delamination damage, through holes and bonded mass inhomogeneities. Although numerical and experimental similarity indices are smaller at higher frequencies, there is no clear evidence that single transducer pair time reversibility breaks down and represents a reliable damage diagnostics tool.