bluuebunny/crossref_metadata_2025 huggingface dataset:
Design Optimization of a Rocker-Joint Silent Chain and Sprocket Drive Based on the Mesh Performance Indices
Authors: Su Wen Yi , Wu Yu Ren
Published: September 2012

Improvement on noise, vibration and wear in silent chain drives is always an important research subject. However, design methods revealed in public are few because the silent chain shapes are variable and complex. A feasible design procedure is extremely required for improving transmission performance of chain drives. Therefore, a novel design optimization procedure for the rocker-joint silent (RJS) chain and sprocket drive is proposed in this paper. The mathematical models of geometry generation, tooth contact analysis and impact velocities at different mesh stages and chain raise amount in the RJS chain drive have been established. Besides, impact velocities and raise amount which may produce ill effects in the chine drive are incorporated as a multi-objective function to carry out the global minimization trying to find out the optimal design parameters for RJS chain drives. The single-objective optimization trends have also been verified with the previous references.
Clamp Equipment Design and Motion Analysis with ANSYS for Large Cylindrical Segment
Authors: Wang Feng Hui , Liu Qian , Wang Hai Ming
Published: September 2012

In this research, a kind of clamp for large cylindrical segment slinging and transportation was designed. Instead of the traditional theory that based of friction to slinging and transport, a new designing method that slinging cylindrical segment by grasping double hooks was taken in this research. Parallelogram structure was used to keep the clamp synchronous and horizontal movement. The design process is that Using principles of Parallelogram structure, Parallelogram structure is initially established. Parallelogram structure Motion analysis function of the ANSYS software was used to analyze the motion status of this parallelogram structure under the load. Ensure rationality of design.
Analysis and Control of Multi-Choice and Non-Linear Error for a Spindle-Rotating Machine
Authors: Yin Chun Hui , Jing Huan Jing , Ren Fei
Published: September 2012

The mechanism model of a spindle-rotating machine is proposed in this paper according to the mechanism theory.The movement model is established using coordinate transformation,and the solving of this model is discussed.Based on these,efficient algorithms for multi-choice and non-linear errors have been presented.A dedicated post-processor with non-linear error compensation function was developed by VS2010 language.A circle frame cutting experiment was conducted and the result showed that the algorithms was correct.
The Effect of Spring Mass on Nonlinear System Dynamic Behavior
Authors: Yang Qing Chao , Lou Jing Jun , Wu Hai Ping , Tang Si Mi
Published: September 2012

A model is established in this paper about the impact of mass spring on the particle in nonlinear systems with dead-zone and the particle’s subsequent synchronised movement with spring. Simulates are conducted under different conditions, and it is found that when the spring mass is large, the phase plane of particle’s motion trajectories change significantly to the condition when spring is no mass. It is concluded that the spring mass have a great influence on the dynamic behavior of nonlinear systems with dead-zone.
Mode Analysis of Linear Vibrating Screen Based on ANSYS
Authors: Wei Chun Yu , Zhang Song
Published: September 2012

In this paper, the vibration and deformation status analysis of the main beam of the linear vibrating screen under exciting force was done. It’s helpful to make sure about the safety of the linear vibrating screen which was used in the factory. Vibration frequency analysis calculation, strain and main beam deformation status under different frequency orders were analyzed in this paper, based on the simple modeling function of Solidworks software the powerful mode analysis function of the ANSYS software. The conclusion was that this linear vibrating screen was safe enough for the factory.
Design Cost Fuzzy Evaluation between Virtual and Traditional Mobile Robots Design
Authors: Wang Jing Kun , Zhang Shan Yong , Hou Fei
Published: September 2012

75% to 80% of the mobile robots cost is determined by product design. Under normal circumstances, the quoted price of the product design is about 12% to 15% mobile robots price during the current market quoted price. The costs and the cost difference between virtual and traditional mobile robots design can be compared quantitatively by fuzzy evaluation using the product design cost function. The quantitative comparison results according to the mobile robots design showed that virtual design costs were significantly lower than traditional designs costs.
Study on Performance of Automobiles Muffler Based on Sound Transfer Matrix Theory
Authors: Hu Qi Guo
Published: September 2012

According to the characteristics of automobiles exhaust noise of high pressure level and middle-low frequency, combining sound transfer matrix theory and FEM-Fluid analysis method, simulations of the transmission loss with non-insertion tube expansion chamber muffler, single insertion tube expansion chamber muffler and dual insertion tube expansion chamber muffler are carried out, which obtain the transmission loss curves of mufflers in different structures and different perforation rates. The results show that the max transmission loss and the average transmission loss of the muffler with perforation rate of 5% are greater than that of 3% and 10% below the low frequency of 200Hz; dual insertion tube expansion chamber muffler not only can increase the transmission loss below the frequency of 4000Hz, but also can effectively improve the performance of the mufflers in which have non-perforation tube and single insertion tube at some frequency points. The results of research can provide technical reference for exhaust muffler design of automotive.
The Analysis for the Influence of Engine Excitation on the Dynamical Behavior of Motor Vehicle
Authors: Sun Li Xing , Shu Ge Qun
Published: September 2012

In the multibody dynamics analysis for motor vehicle, engine excitation, as a major excitation affecting the dynamic behavior of motorcycle frame, should be discussed. In this paper, a real-sized virtual engine model is established to replace lumped mass sphere ever discussed in dynamic simulation of vehicle, on which elaborate dynamic simulation of the valve train in engine is conducted at working condition to investigate the dynamic response of frame. The vertical acceleration response of the frame is achieved by using solution formulations set in professional program, and the comparison is discussed between different simulation results of frame dynamic behavior with or without engine excitation to determine the significance of dynamic simulation with considering the interaction between excitation and mechanism which is then utilized to discuss the vibration and smoothness performance of whole mechanical system.
Exact Solution of Axial Stress for a Multilayered Pressure Vessel Subjected to Mechanical and Thermal Loads
Authors: Wang Ze Wu , Zhang Qian , Xia Liang Zhi , Hu Da Peng
Published: September 2012

At present, limited work was reported on the exact solution of axial stress for a multilayered pressure vessel subjected to mechanical and thermal loads. However, the axial stress plays an important role to the structural strength due to the influence of thermal load. Based on the theory of thermo-elasticity and finite element (FE) technology, therefore, the exact solution and numerical solution were constructed for a multilayered urea synthesis tower made of different kinds of materials subjected to an internal pressure and a thermal load. Results show good agreement between the theoretical solution and numerical solution, and thus it demonstrates the reliability of the derivation process and developed calculation formula, which would be helpful for more precise calculation and scientific design of the multilayered pressure vessel.
Experimental Study on Heat Pipe Radiator in Cooling Electronic Apparatus
Authors: Zhao Zhong Chao , Ye Rui , Zhou Gen Ming
Published: September 2012

To solve the cooling problem in modern electronic device, a kind of heat pipe radiator was designed and manufactured in this paper. The heat transfer performance of heat pipe radiator and its relationship with air velocity were investigated by experimental method. The experimental results show that the heat pipe radiator can meet the temperature requirement of electronic device with the power range from 40W to 160W. To keep the operational temperature of electronic device with power of 160W under 75°C，the air velocity should be keep at 1.7m/s. The heat dissipation performance of heat pipe radiator was enhanced with the air velocity increased from 0.2m/s to 1.7m/s.for the electronic equipment with power of 160W.
Entropy Maximization, Stationary Wavelet and DCT Based Segmentation, De-Noising and Progressive Transmission Technique for Diseased MRI Images
Authors: De Arunava , Bhattacharjee Anup Kumar , Chanda Chandan Kumar , Maji Bansibadan
Published: September 2012

We have devised a way of segmentation and progressive transmission of diseased MRI images. We use Particle Swarm Optimization (PSO) to get the region of interest (ROI) of the diseased MRI image. We use the concept of Multi-resolution Wavelet analysis to de-noise the ROI. We use Stationary Wavelet Transform together with Soft Thresholding Technique for de-noising purpose. A variable mask is used to get the segmented image. Varying percentages of DCT coefficients are used for progressive transmission of the diseased MRI image. Clustering of the images using K-Means algorithm result in predominantly two cluster namely that of diseased cells and background. Test on various MRI images show that the small diseased objects are successfully extracted irrespective of the complexity of the background and difference in intensity levels and class sizes. The proposed method only transmits the diseased MRI for further diagnosis of the disease and treatment.
Detection Method Optimization of Optical Fiber Evanescent-Wave Hydrogen Gas Sensor
Authors: Tang Yi Ke , Zhang Jie , Zhou Chuan De , Liao Bin
Published: September 2012

As the optical power variation is relatively small before and after the Pt/WO3film was exposed to hydrogen gas, traditional detective method to measure directly the variation of optical power in the fiber core is susceptible to interference. Therefore a new detection method, which is able to improve the relative variation for nearly 9 times by detecting the variation of optical power in the evanescent field, was proposed through mathematical analysis and simulations. The fundamental structure and working principle of step-index single mode optical fiber sensor were introduced.
Research on Selection of Competitive Advantage Orientation of Green Products
Authors: Zhu Ai Min , Yu Li Juan , Wang Wen Ran , Gao Bo
Published: September 2012

According to the different values of companies and different stages of life cycle, this paper analyzed the relationship between the different priority orientation and the combination of competitive advantage, and estimated the effects of different combination on the competitiveness of green products. Used the impact curve and cost curve, we analyzed the most influential factors to the overall competitiveness of green products in the main factors of competitiveness, and ordered them in accordance with the impact of them to established the lasting competitiveness of products. This provided a basis for the focus of future work of companies.
Fit of Strategies Based on Product-Process Matrix
Authors: Gao Tian Tian , Tian Ye Zhuang
Published: September 2012

We perfect Product-Process Matrix theory of Hayes and Wheelwright and propose a more generalized theoretical strategic model. In this paper, the data from International Manufacturing Strategy Survey in 2009 is used to examine the new model by hierarchical regression analysis. The results show that, different matches between flexible production capacity (manufacturing strategy), speed of product update and product customization (market strategy) will lead different business performance. The results improve the Product-Process Matrix theory, and provide theoretical and practical guidance to manufacturing enterprises for strategies choice.
The Lyapunov Exponent Variance of an Electronic Manufacturing Enterprise’s Daily Qualified Rate Time Series by Improved Small Data Sets Approach
Authors: Gong Zhu Ping
Published: September 2012

Small data set approach is used for the estimation of Largest Lyapunov Exponent (LLE). Primarily, the mean period drawback of Small data set was corrected. On this base, the LLEs of daily qualified rate time series of HZ, an electronic manufacturing enterprise, were estimated and all positive LLEs were taken which indicate that this time series is a chaotic time series and the corresponding produce process is a chaotic process. The variance of the LLEs revealed the struggle between the divergence nature of quality system and quality control effort. LLEs showed sharp increase in getting worse quality level coincide with the company shutdown. HZ’s daily qualified rate, a chaotic time series, shows us the predictable nature of quality system in a short-run.
FEM Modeling of Vibro-Impact Response of Metal Plates Excited by a High-Power Ultrasonic Transducer
Authors: Chen Zhao Jiang , Zhang Shu Yi , Zhang Zhi Liang
Published: September 2012

When thin metal plates are excited by a high-power ultrasonic transducer, superharmonic and high-order subharmonic vibration phenomena of the plates are observed in our experiments. However, the nonlinear mechanism in the system is still not fully understood. In this paper, a finite element model is established based on the experimental conditions and numerical simulations are performed to explore the generation mechanism of the nonlinear vibration. By comparing the waveforms and frequency spectra of the vibration velocity of the plate to these of the contact force between the ultrasonic horn tip and the plates, it can be found that waveform distortion of the contact force is the main reason for generating the superharmonic vibration, while the intermittent contact-impact between the horn tip and the plate is the reason for subharmonic vibration in the plate. The FEM simulation results can explain reasonably the observed experimental phenomena, which are useful to help to improve the effects of the nonlinear phenomena occurred in ultrasonic processing.
Pressure Fluctuations and Flow-Induced Vibration Measurements in a Hard Disk Drive under Different Rotation Speeds
Authors: Min He Qun , Huang Xiao Yang , Zhang Qi De
Published: September 2012

Flow-induced vibration (FIV) of a head gimbals assembly (HGA) in hard disk drives (HDDs) limits the positioning accuracy of magnetic head in the HGA for higher HDD magnetic recording density. The pressure fluctuations characterize turbulent fluctuations exciting the HGA off-track vibration (HGA-OTV). In this paper, experimental studies have been carried out to investigate the spectrum characteristics correspondence between pressure fluctuations around an HGA and the simultaneous HGA-OTV under different HDD rotation speeds. A practical and effective experimental setup has been implemented to enable the simultaneous measurements on both the pressure fluctuation and HGA-OTV signals, where pressure fluctuations are measured with a pressure transducer through a small hole on the HDD top cover and the direct HGA-OTV signals are detected through a laser Doppler vibrometer. Results under conditions of three different HDD rotation speeds of 7200, 9000, 10800 rpm have been investigated and compared. It is shown that the HGA off-track vibration spectra are highly associated with those of the pressure fluctuations in terms of principal peaks in four frequency bands around 1.8 kHz, 2.5-3.5 kHz, 7-7.5 kHz and 11.5-12.5 kHz. With increasing HDD rotation speed, it is shown that the spectrum magnitudes of both the pressure fluctuation and the HGA off-track vibration increase correspondingly, while the principal peak positions in spectra of either pressure fluctuation or the HGA off-track vibration always hold the line. This study demonstrates a causal nexus from the pressure fluctuation to the HGA off-track vibration and suggests the feasibility of controlling the HGA-OTV through suppression of pressure fluctuations around the HGA.
A Novel RNA Genetic Algorithm for the Application with Boundary-Layer Problems of the Fluid Mechanics
Authors: Si Xin Yi , Fang Guo Hua , Zhou Jian Hui , Wang Ting
Published: September 2012

The boundary-layer theory explains very well the steady-state flow over a flat plate at zero incidence angle known as the Blasius flow. It is long known that the appearance of boundary layers is not restricted to the canonical problem of the motion of a body through a viscous fluid. Several other technologically important sources of boundary-layer behavior are the flows behind expan- sion and shock waves travelling over smooth surfaces and the flow above a moving conveyor belt. In fluid mechanics, to obtain the multiple solutions in ordinary differential equations is always a concerned and difficult problem. In this paper, a novel RNA genetic algorithm (NRNA-GA) inspired by RNA molecular structure and operators is proposed to solve the parameter estimation problems of the multiple solutions in fluid mechanics. This algorithm has improved greatly in precision and the success rate. Multiple solutions can be found through changing accuracy and search coverage and multi-iterations of computer. At last, parameter estimation of the ordinary differential equations with multiple solutions is calculated. We found that the result has great accuracy and this method is practical.
A V-Norm Decoupling IMC Method with Filters Based on Inverted Decoupling
Authors: Jin Qi Bing , Li Rong
Published: September 2012

A V-norm Decoupling internal model control (IMC) method with filters based on inverted decoupling for multivariate stable object is proposed in this paper. The actual industrial process is very difficult to obtain an accurate model, which makes the control effect not satisfactory. To solve this problem, the V-norm decoupling controller is designed on the basis of the inverted decoupling, and a filter is added in front of the controller to reduce coupling and increase robustness. Compared with traditional multivariable controller designed method, the method of designing the internal model controller in this paper is simpler and less calculation. Finally, the Wood/Berry model is taken as the simulated object to verify the controller design method is reasonable. The results show that V-norm decoupling internal model controller method is effective and feasible, even the system model is mismatched.
An Atomistic Study on the Slip Deformation Mechanism of Crystalline Materials Using a Weak-Plane Model
Authors: Uehara Takuya
Published: September 2012

Molecular dynamics simulations were carried out to investigate the plastic deformation mechanism of fcc crystalline materials using the conventional Lennard-Jones potential. An fcc structure with square cross-section was prepared, and a tensile load was applied in the longitudinal direction. A weak potential was assigned to a specific (111) plane to induce a slip on the specified plane. Accordingly, a slip was initiated in the weak plane following an elastic deformation. The step-by-step motion of the atoms on the slip plane was studied, and a detailed trajectory is presented. The slip then expanded to other planes, and plastic deformation progressed in the whole model. The weak plane was also set as (110) or (100) plane, where different deformation modes were observed: not only slip but also gradual distortion or brittle fracture occurred.
New Tool Planning and Introduction System for Manufacturing of Engine Components
Authors: Mangarulkar Amrita , Thete Rahul , Dabade Uday
Published: September 2012

Tool management has been defined as a process improvement that aims at resolving problem related to various tool activities including procurement, storage, database development, selection and consumption, inspection, presetting, delivery, loading, monitoring, replacement planning and inventory control of tools. A tool management system is an organized approach to manage engineering change or improvement. The main objective of the work is to improve control on tool inventory with the help of tool database and new tool introduction system. With this system, we ensure to have more accurate determination of the rate of inflow of tools in stores and consequently, reduction of tools inventory in stores. The system also helps to determine the optimum sequence of execution of orders.
Research on Reverse and Obverse Modeling for Mechanical Equipment Parts
Authors: Tu Qun Zhang , Zhao Jian Xun , Pan Ming
Published: September 2012

The model reconstruction based on the reverse and obverse is a main method in reverse engineering applications at present. A new method is put forward for reverse modeling of mechanical parts, which is based on combining reverse software Geomagic Studio and Imageware with CAD system Pro/E. A detailed scheme is designed and it is put into practice by taking a mechanical part for example. The feasibility and practicability of the method is confirmed for model reconstruction of mechanical parts in reverse engineering.
The Analysis of the Test Results Base on the Performance Sample Processing Differences
Authors: Zhang Dai Lu , Hu Shi Jun , Zhang Hong Xiang
Published: September 2012

In the mechanical properties test, in order to ensure test results reflect the characteristics of the material itself reliably, the sample’s quality of processing is an essential prerequisite. Performance sample with different shapes were processed into different diameters, different shoulder of the transition area, and different width, to be conducted with tensile tests of mechanical properties. The results show that differences in sample processing on the mechanical test results are different, and we fine some disciplines by analyzing the reasons causing the differences.
Fatigue Mechanism Revealed through Multistage Strength Degradation of Notched Concrete Beams under Sequential Loading
Authors: Shi Zi Hai , Nakamura Yukari , Nakano Masaaki
Published: September 2012

Under cyclic loading, the material weakening processes in structural members inevitably involve multiple cracking originating from some of the spatially-distributed initial flaws and imperfections, and hence diverse cracking behaviors can be expected. It is known from previous studies on multiple cracks that, the cracking behavior in a structural member can abruptly change as a crack or a number of cracks reach a critical value of crack propagation, causing sudden strength degradation. In this study, by applying sequential loads at different locations of the same FE model of a notched beam, it is shown that this unique strength degradation mechanism can repeatedly occur as cracks propagate under sequential loads, leading to multistage strength degradation of the member. This result is in line with early experimental findings that the load-carrying capacity of a notched concrete beam under bending decreases in a similar fashion as the sizes of multiple initial notches are arbitrarily increased. This study has important implications for understanding the fundamental fatigue mechanisms of various engineering materials.
The Study on the STEP-NC Program Generation for Milling Operations
Authors: Yang Lin , Wu Rui Nan , Wang Jin Yuan
Published: September 2012

STEP-NC is a new data model for data exchange between CAD / CAM and CNC, which provides rich information for CNC machine tools and tells CNC “what to do”rather than “how to do”, overcomes many shortcomings of the traditional G&M codes and has become a hot research issue now. How to efficiently and cost-effectively generate the STEP-NC program is a very crucial problem. Although some domestic scholars have done some research about STEP-NC program generation, most of them do second development base on ST-Developer software. The paper developed a STEP-NC program generation module by using the VC++6.0 and CAD / CAM software. The module can read AP203 file generated by CAD system, identify manufacturing features according to its geometry information and conduct process planning to generate STEP-NC file according to ISO14649 standard. This module has been proved effectively by an instance.
Research on the Pattern and Application of Hybrid Power System
Authors: Zhang Rui , Wang Ju Qun , Liu Bo Dong
Published: September 2012

To overcome the limitations of traditional classification about hybrid power system, the analytical method of energy input-output are introduced into. From the viewpoint of energy input and hybrid power output, this paper classified hybrid power system pattern into four types that are applicable to a wider scope of hybrid power technology. Then, an overview of stirling engine (SE) that is well adapt to various energies and friendly to the environment was provided. In order to fully utilize solar energy, biomass energy and other clean renewable energy, a kind of stirling engine integrated with multi-energy platform was designed, by combined with the corresponding combustion chamber device. Finally, SE thermoelectric hybrid power system was constructed to take full advantage of the good characteristics of stirling engine and compensate for its shortcomings, that provides an effective way to the development and utilization of clean energy and advanced power technique.
Approach to some Properties near the Wall of Parallel to Wall Shear Flow
Authors: Liu Zhao Cun , Fan Wei Jia
Published: September 2012

From the viewpoint of vortex dynamics, the flowing properties and the characters of transition from laminar flow to turbulent flow were analyzed, the concept of the Reynolds number was reviewed and studied. The different form of the Reynolds number was presented to relate it with fluctuating and breaking down processes to show its dynamical mechanism. On the basis of phenomenological properties, the velocity distribution near the wall was studied to show that the profile connects with the flowing structure which is different from the linear form what usually considered to be, thus the velocity distribution near the wall remains open. Finally, the form of the velocity distribution should follow was probed.
The Curving Behaviour of Heavy-Haul Locomotive Couplers
Authors: Xu Zi Qiang , Luo Shi Hui , Wu Qing , Ma Wei Hua
Published: September 2012

Two types of typical heavy-haul locomotive coupler models were presented, one is round-pin coupler with shoulder-limit, and another is flat-pin coupler with frictional tail pairs and stop-limit, both of them adapting nonlinear hysteresis buffer models. Utilizing a train model consists of 2 detailed locomotives and 1 simplified freight wagon, curving behaviour of different couplers were studied. The results show that, the actual curving behaviour of different couplers could be accurately simulated by the established coupler dynamics models. This paper will play a promoting role for analyzing actual heavy-haul locomotive running behaviours and safety.
The Vibration and Measurement of Drive Mode of MEMS Gyroscope Based on the Image Processing
Authors: Zhao Jie , Yao Feng Lin , Gao Shi Qiao , Gao Chong Ren
Published: September 2012

This paper introduces the working principle of the micromacined gyroscope, and establishes the drive equation of it. By solving the differential Equation, the analytical solution and the amplitude-frequency characteristics of the driving mode are obtained. By the visual measurement based on high-speed photography and the post image processing, it measures the vibration of the drive mode of the micromachined gyroscope. And it puts forward a novel displacement detect algorithm that based on the image processing, and with Matlab it verifies the analytical solution and the amplitude-frequency characteristics of drive mode of the micromachined gyroscope. This helps the study on the vibration of the micromacined gyroscope, and provides a new way to measure MEMS.
Determination Method of the Revenue-Sharing Coefficient in Three-Echelon Vehicle Supply Chain
Authors: Guo Yi Cheng , Hou Kai Hu
Published: September 2012

According to the benefit sharing problem among the market competitive vehicledealers, vehicle manufacturers and auto parts suppliers consisting of three-echelon automotive supply chain, by using decentralized and centralized decision-making ways, we set up a mathematical model, which meet the coordinated conditions and achieve a win-win model for enterpricses within the supply chain.After analyzing the pricing of three-echelon vehiclesupply chain with the applicationof game theory, get the balanced result and profit at all levels in the condition of complete information. According to the interests of the entire supply chain based on the principle of contribution distribution, designed the parameters to make the entier supply chain achieving the maximize profit. We also proposed the way of determining revenue sharing system of three-echelon vehiclesupply chain. Finally, the reasonableness of the sharing factor determining method is proved by numerical examples.
Dynamic Characteristics of a High Speed Precision Positioning Platform Driven by Linear Motors
Authors: Wang He Ying , Wang Fu Jun , Zhao Xing Yu , Shi Yi Guang , Zhang Da Wei
Published: September 2012

Positioning systems with higher speed and accuracy are required in semiconductor package manufacturing, and the product quality and production efficiency can be further improved. So this paper presents a new 2-DOF precision positioning platform with high speed. The platform is directly driven by linear motors, and a novel elastic decoupling mechanism is put forward. High positioning accuracy and good stability in a short stroke, high precision and high speed movement can be achieved using linear motors. The X axis and Y axis kinematic decoupling is realized through the novel elastic decoupling mechanism based on a preloaded spring and flexure hinges, and the dynamic characteristics of the system are improved. The dynamic characteristics of the positioning platform in free state are investigated based on finite element analysis, and the natural frequencies and vibration modes of the positioning platform are obtained, which provides theoretical basis for the further dynamic control of the positioning platform.
The Influence Factor Analysis on Stability of Communication Links Based on Cluster-Tree WSN Using ZigBee
Authors: Xu Yuan , Chen Xi Yuan
Published: September 2012

Zigbee technology which targets low data rate, low power consumption and low cost application is suitable for Wireless Sensor Network (WSN) as its wireless communication technology. In the construction of WSN using Zigbee, the factors which could affect the stability of communication links should be considered. In this work, we discuss the construction environment of WSN. Then, in order to access the performance of Cluster-Tree network, we develop an NS2 simulator for Cluster-Tree WSN, and analysis the influence to stability of communication links caused by sending packet ratio and communication range. The simulation results show that it is not useful to improve the stability of communication links by increasing sending packet ratio and communication range simply. Both of them should be in a relatively balanced state.
Research in Fuzzy Quality Control Chart Base on Similarity Index
Authors: An Jing Wen , Bai Ying
Published: September 2012

This paper is focusing on the application of control chart based on fuzzy similarity in the monitor of products quality. Methodologically, this paper verified a way that transferring the form of real product dates to that can be used in fuzzy control chart, and, moreover, successfully calculated and traced and control chart.
Gene Expression Programming Based Classification for Automated Birth Defects Detection
Authors: Wu Bao Hua , Duan Lei , Wang Gui Hua , Wang Hai Yang , Peng Jing
Published: September 2012

With the rapid development of digital medicine, improving the diagnostic accuracy for birth defects (BD) by using data mining techniques has been paid more attentions by researchers. In this paper, an automated classification technique based on Gene Expression Programming (GEP) to detect the defect infants, named Birth Defects Detection based on Gene Expression Programming (BDD-GEP) is proposed. The main contributions of this paper include: (1) proposing two contrast inequalities (CIs) for birth defects detection: the defection contrasts to normal and the normal contrasts to defection, (2) designing a new fitness function to mine the normal and defect CIs by GEP, (3) presenting a method to select useful CIs for classification, (4) implementing the BDD-GEP algorithm through combining the proposed CIs with k-Nearest Neighbor algorithm. In order to evaluate the proposed classification method, 11,897 infant samples from national center for birth defects monitoring of China were used, and the method was compared with several existing classification methods. The experimental results show that the overall detection accuracy of BDD-GEP was as high as 87.8%. Specifically, the F-measure of the detect samples was about 70.2%, and the F-measure of the normal samples was about 92.3%.
Analysis of High Dimensionality Yeast Gene Expression Data Using Data Mining
Authors: Aouf Mazin , Liyanage Liwan
Published: September 2012

Data Mining is the process of discovering interesting knowledge from large amounts of data stored either in databases, data warehouses, or other information repositories. From biological studies, the Yeast Proteome Database (YPD) is a model for the organization and presentation of genome-wide functional data. Accordingly, a yeast gene expression which is a unicellular DNA is selected which contains 6103 genes and the database combined with a number of related dataset to create a general dataset. DNA-binding transcriptional regulators interpret the genome’s regulatory code by binding to specific sequences to induce or repress gene expression. The gene products including RNA and protein are responsible for the development and functioning of all living membranes by 2 steps process, transcription and translation. Various transcription factors control gene transcription by binding to the promoter regions. Translation is the production of proteins from mRNA produced in transcription. In this study, out of the 169 transcription factors known to access yeast, we are considering those thought to be involved in the response of Hydrogen Peroxide (H2O2). They are 22 transcription factors. Each one is partitioned to 3 parts: TF with No H2O2, TF with Low H2O2 and TF with High H2O2. The aim of this paper was to enhance the effectiveness of the integration of hydrogen peroxide response data related to yeast gene expression data to obtain a protein response process model and to label a set of important genes related to this approach.
Information Organization of Augmented Reality Maintenance Guiding System
Authors: Zhao Xin Can , Wen Zhen Hua
Published: September 2012

The information organization and expression is a key issue for the Augmented Reality Maintenance Guiding System（ARMGS）. In this paper, we firstly build up the relationship between the aircraft maintenance manual, EBOM figure and virtual prototype data , then construct a prototype of Interactive Electronic Technical Manual (IETM). The system can convert the aircraft virtual prototype data to the required information for augmented reality maintenance guiding system, based on the information, the prototype can be rapidly and lifelikely displayed. The system proposed in this paper significantly improves the quality and effectiveness of modeling.
A Shuffled Frog Leaping Algorithm for Solving Vehicle Routing Problem
Authors: Luo Kai Ping
Published: September 2012

For vehicle routing problem, its model is easy to state and difficult to solve. The shuffled frog leaping algorithm is a novel meta-heuristic optimization approach and has strong quickly optimal searching power. The paper applies herein this algorithm to solve the vehicle routing problem; presents a high-efficiency encoding method based on the nearest neighborhood list; improves evolution strategies of the algorithm in order to keep excellent characteristics of the best frog. This proposed algorithm provides a new idea for solving VRP.
Analysis of the GI/Geo/c Queue with Working Vacations
Authors: Gao Yan , Liu Wen Fen
Published: September 2012

Working vacation queue models are well applied in the modeling and analysis of the router in optical networks. The GI/Geo/c queue with working vacations is studied in this paper. Through establishing two-dimensional Markov chain and using matrix-geometric solution method, the stability condition is derived. Adopting UL-type RG-factorization of irreducible Markov chain, the stationary distribution is given. Based on these, the probability distribution of queue-length and PGF of waiting time are obtained in the end.
Research on Software Reliability Based on Forecasting Model Combined by LS-SVM and Markov Chain
Authors: Zhu Xiao Mei , Zhang Qun Yan
Published: September 2012

To improve the accuracy of prediction on software failure data, one combine forecasting model is proposed based on least square support vector machine (LS-SVM) and Markov chain. First, LS-SVM optimized by simulated annealing algorithm (SA) is adopted to establish the time series forecasting model on software failure data. Then, in order to improve the prediction accuracy, the prediction interval is narrowed by means of Markov chain. Finally, after applying the combination forecasting model to the predicting of one commercial software failure data, the results indicate that the model has a certain precision and reliability.
The Study of System Model Based on Fuzzy Inference and Neural Network
Authors: Gao Ming Ming , Shan Liang
Published: September 2012

For the characteristics of fuzziness, indeterminacy etc. in nonlinear systems, this paper, combining fuzzy inference system with neural network, Adaptive Neural Fuzzy Inference System model had been provided in the paper, ANFIS method is based on Sugeno fuzzy model and has a structure similar to neural network that tunes the parameters of the fuzzy inference system with back propagation algorithm and least - square method and can produce fuzzy rules automatically. This solutes extraction of fuzzy rules and learning of parameters of membership functions play an essential role in the design. This paper gives the simulation example of modeling a typical system with ANFIS method and good result is obtained.
The Target Tracking Algorithm Based on Local Binary Pattern Texture Model
Authors: Yan Wen Sheng
Published: September 2012

In the target tracking algorithm, the target representation has an important impact on the target tracking performance. The previous target tracking algorithm using color model to represent the target, it can not achieve effective tracking when the target and background are in similar colors. Therefore, an improved target tracking algorithm, embedded the local binary pattern (LBP) texture model successfully, is used for target tracking algorithm. Analysis shows that in complex conditions, texture and color model based target representation have significantly improved tracking performance.
Target Recognition in Complex Background with Optical Joint Transform Correlator
Authors: Nie Liang , Jiang Xu , Wu Ji’an , Duan Cun Li , Liu Bao Yuan
Published: September 2012

The optical joint transform correlator (JTC) has been used in target real-time recognition, but the interference of complex background has always been the difficult problem for recognition system, which limits its further development and application. In this paper the principle and experimental system of JTC are introduced. The interference of complex background is simulated and the optimization method is proposed to process the joint power spectrum to eliminate zero-order correlation peak. The analysis result shows that the method of power subtraction can enhance the output peaks and improve the recognition efficiency, particularly for target identification in complex background.
Simulation Analysis of Vibrating Screen Driven by Two Motors
Authors: Wang De Gang
Published: September 2012

In this paper, the study object is a vibrating screen driven by two motors. A new analytical method is proposed to study the dynamic feature of the screen. With introduction of two small variable parameters to average angular velocity of two exciters and their phase difference, the parameters of the model were dimensionless processed, and then the synchronization condition and stability condition of the vibrating screen were deduced. Computer simulation results based on synchronization condition and stability condition show that the vibrating screen realizes speed synchronization and phase synchronization, the system is in a good self-synchronous state.
Research and Implementation of a Trusted Removable USB Flash Device
Authors: Cheng Yong , Wu Jiang Jiang , Mei Song Zhu , Ren Jiang Chun , Ma Jun
Published: September 2012

In this paper we present the research and implementation of TRFD, a Trusted Removable USB Flash Device which can resist various attacks. TRFD is an independent system which would authenticate the user and host before data access. All the data secure processing of TRFD, such as encrypting, signing, are performed inside the device, so TRFD can protect the data against host hacking. The evaluation of our prototype shows that TRFD can solve some security issues of removable storages indeed.
Stochastic Dynamics of Biological Network Regulated by Small RNA
Authors: Shen Jian Wei , He Qin , Yang Zhi Hua
Published: September 2012

Recently, the experimental data displayed that the small RNA played the important role in the gene regulatory network, furthermore , the noises and delay are ubiquitous in the nature and play the important role, so we should investigated the small RNA network with noises and delay and study the dynamical behaviors. In this paper, we studied the nonlinear dynamics of the model by using the theory of nonlinear dynamical system and obtained some results as follows: (1) the system against the small noise is robust;(2) the small noises have the impact on the amplitudes;(3) the large amplitude noises have the significant effect on the cycle in the system. These theoretical results can help us understand the process of gene regulatory.
Numerical Simulation of Homogeneous Polycrystalline Grain Formation Using Multi-Phase-Field Model
Authors: Uehara Takuya , Suzuki Hideyuki
Published: September 2012

A modified multi-phase-field model for regenerating a homogeneous polycrystalline microstructure was presented. An extra term was introduced to the original formula by Steinbach et al. by assuming that the stability of every grain constituting the microstructure depends on the grain size distribution. The effect of the term on the obtained microstructure was then verified by numerical simulations, and it was found that a homogeneous microstructure having nearly the same shape and size was generated. The influence of the parameter was also investigated, and it revealed that the parameter was dominative on the grain size at the steady state.
Visual Analysis in Reference Management Software
Authors: Veljković Nataša , Antolović Igor , Stoimenov Leonid
Published: September 2012

This paper deals with representation of scientific references’ data and visual analysis of this data using web based scientific reference management software. The Reference application, is a web based reference management software, that enables easy administration and management of authors and scientific references. Similar web based reference management systems additionally support advanced tools for data visualization and exploration but the downside of this solutions is that they require installation of additional plugins due to the fact that visualization within the web browsers requires advanced graphics capabilities thus limiting the usability of these applications. The Reference application on the other hand introduces a solution for data visualization and exploration that relies on extensive usage of the latest HTML5 web standard featuring support for rich graphic intensive web applications hence forcing maximum usability and compatibility with the modern web browsers. This paper describes the visualization tool within Reference application, its implementation and functionalities.
Empirical Analysis on IT Investments Efficiency and Influence Factors of Equipment Manufacturing Industry Based on DEA-CART Model
Authors: Hu Ming Yan , Guo Wei , Zhao Nan , Wang Lei
Published: September 2012

For explicating the underlying linking mechanism between IT investment and firm performance, this paper develops a framework to examine the influence factors of IT payoff efficiency. From a process-oriented perspective, the study measured the IT investment efficiency using continuous data from 485 Chinese enterprises in 2006-2008. The result shows that only 11.03% of total samples are effective based on data envelopment analysis(DEA). So it suggests that a majority of firms can achieve differential performance over competitors by improving the organization’s capacity to absorb IT. And then some main factors that affect technical efficiency were identified using classification and regression trees(CART) method. The results indicate the influence factors including enterprises’ scale, strategic IT planning and density of trade’s fund. The interaction of information system application and training density positive influences IT investment efficiency. Possibility for future research can keep on in these areas.
The Key Challenges for the Development of a BIM and Mobile Computing Based Collaborative System in the Construction Industry
Authors: Chen Yuan
Published: September 2012

The construction industry has characterized the fragmentation features including the multiple construction phases and multidisciplinary participants. The advances of BIM concepts and technologies give the construction industry a powerful potential to improve the coordination and collaboration for the whole building lifecycle. This paper reports an on-going project that aims to develop a BIM and Mobile Computing supported collaborative system and discusses the key challenges for the implementation of BIM and Mobile Computing in the construction industry. This paper concludes with future development and validation of the system.
A Semantic E-Tourism Framework Based on Cloud-Computing
Authors: Zhang Xiao Ming , Xu Cheng
Published: September 2012

Currently many new business models of tourism are emerging, which makes modern e-Tourism system more sophisticated and larger than before. However, most existing e-Tourism infrastructures have become very reluctant to meet these new rapidly increasing requirements because of lack in computing and storage flexibility. So this paper presents a promising open e-Tourism framework based on cloud computing which is able to provide elastic utilities and capabilities through virtualization of computing and storage resource. The system architecture and crucial design issues are discussed in the paper.
Finite Element Analysis (FEA) for Wrinkling Initiation in ASTM A36 Steel Sheet Metals
Authors: Masud Manzar , Manarvi Irfan Anjum , Sattar Amer
Published: September 2012

Thin metal sheets are increasingly used for different purposes in automotive and aerospace industry. These sheets are prone to wrinkling during forming which is a major defect. Wrinkles are formed due to non uniform compressive stresses resulting from multi axial stretching of materials. Its initiation may be due to material properties, geometric constraints and stress applied. This research is focused on FEA of steel ASTM A36 sheets to predict their wrinkling initiation and growth.