bluuebunny/crossref_metadata_2025 huggingface dataset:
The Analysis of No Recirculation of Closed Planetary Bevel-Type CVT
Authors: Wu Yun Jie , Liu Kai Chang
Published: June 2012

Kinematic and the direction of the power flow for closed planetary bevel-type CVT are performed. The relationship between partition coefficient of power and power flow in closed system is studied by analyzing closed planetary bevel-type CVT, the expressions between power partition coefficient and the basic speed ratios are established, the necessary conditions with no recirculation of power for closed planetary bevel-type CVT are determined. Sixteen possible interconnections of parallel planetary gear train and planetary bevel-type CVT are obtained. A effective compact analysis processing method for design of closed planetary bevel-type CVT with no recirculation of power is offered.
A New Iterative Method with Sixth-Order Convergence for Solving Nonlinear Equations
Authors: Li Han
Published: June 2012

In this paper, we present and analyze a new iterative method for solving nonlinear equations. It is proved that the method is six-order convergent. The algorithm is free from second derivatives, and it requires three evaluations of the functions and two evaluations of derivatives in each iteration. The efficiency index of the presented method is 1.431 which is better than that of classical Newton’s method 1.414. Some numerical experiments illustrate that the proposed method is more efficient and performs better than classical Newton's method and some other methods.
Driver Study of Touch Screen Based on S3C2440 and Embedded Linux
Authors: Guo Chao , Zhang Jun , Zhi Yong Feng
Published: June 2012

As one of Linux development directions, embedded Linux has many achievements and mature products. Its stability, reliability and the high efficiency is being proved by the facts. Linux has a great potential in the embedded area, which is loved by many businesses, scientific research units. The embedded Linux opens the source code, provides technical support widely and has good extendibility, supports a lot of hardware. All these are the advantages of embedded Linux. Touch screen has been an important human-computer interaction device, for they are light, flexible and take up less space. Most mobile devices offer a touch screen which is used together with a pen in order to take the role of the mouse for application control. A kind of touch screen control system based on ARM and Linux is introduced in detail. Circuit diagram and touch screen working principle is given. In this paper, touch screen driver based on embedded Linux is designed, analyzed and transplanted. Finally, touch screen can be used normally after calibrating.
A Novel Design of the Device for Measuring Draw and Plug Forces
Authors: Hu Ye , Yang Zhao Jun , Xiang Ming Jun , Qiu Zi Chen , Yang Chuan Gui , Song Peng Fei , Qiu Xing
Published: June 2012

The purpose of this paper is to present a novel device for measuring draw and plug forces, which is composed chiefly of a pull stud, a top modified tool shank, a middle modified tool shank, a down modified tool shank, and an end cover. The modified tool shank structure is proposed, and the working principle of the device for measuring draw and plug forces is demonstrated. Also, the data conversion and memory module and the circuit principle are investigated.
Lightning Flash and Lightning Performance of Transmission Lines
Authors: Li Jun
Published: June 2012

Numerous lightning flashes to transmission lines occurred throughout the service time. It has been found that the line outage rate is related to the number of lightning flashes on the line. In this paper, a general description of the phenomena of lightning discharges and the lightning performance of transmission lines is provided form engineering perspective.
Study Surveys on Image Segmentation of Plant Disease Spot
Authors: Diao Zhi Hua , Song Yin Mao , Wang Huan , Wang Yun Peng
Published: June 2012

Segmentation is a fundamental component of many image-processing applications. Various algorithms were proposed so far for segmentation of plant disease images. The researchers raised some corresponding solutions to different characteristics of disease spot, and these algorithms are continually improved to enhance the speed and veracity. Based on current progress, this paper gives a study on the image segmentation classification. In addition, this article also makes a comprehensive expatiation on how to solve the problem of plant disease spot by using image segmentation techniques. In the end, open problems and future trend of segmentation algorithm were discussed.
Study on the Improvement of Measurement Range of Fluidic Gyroscope
Authors: Zhang Bao Li , Piao Lin Hua , Yu Quan Gang , Mei Chuan Zhi , Ding Xia , Wang Xing
Published: June 2012

In this paper we have a comparative study to improve the measurement range of the fluidic gyroscope. Using ANSYS-FLOTRAN CFD software, finite element simulation was conducted by a series of procedures, such as two-dimensional model building, meshing, applied loads and equation solving, we calculated the flow distribution in the sensitive component of fluidic gyroscope with single nozzle and nozzle array. The results show that the upper limit measurement of fluidic gyroscope is the input angular velocity when fluidic column axis deflects to the position of thermistors, and using nozzle array can change the airflow distribution in the sensitive component and achieve the purpose of improving the measurement range of fluidic gyroscope.
Numerical Modeling of Fluid Flow in RH Vacuum Refining Process
Authors: Yuan Jing , Chang Qing Ming , Chen Xi Lai , Yang Yin Kai
Published: June 2012

In this paper, the internal flow field of RH degasser was studied by numerical simulation. The range of the reasonable gas-inlet velocity which is related to the lift gas flow rate was obtained, then the results of two different gas-inlet velocities which are the reasonable velocity and the unreasonable velocity were chosen to be analyzed. Many vortexes and some differences of the flow fields were found in the RH degasser with the two different velocities. Through these results the development of the flow field could be got and it is valuable for the production in factory.
Frost Growth Simulation in Cryogenic Vertical Pipe Flow
Authors: Lee Kye Bock , Kim Yun Hwan , Kim Ho Yeon , Lee Won Gook , Chai Kyeong Il , Rhi Seok Ho , Kim Nak Keun , Shin Dong Ryun
Published: June 2012

This study reports a numerical CFD study concerning the effect of frost thickness on the heat transfer performance of a vertical pipe. Simulation are made under various variables affecting the frost growth such as outer flowing air conditions (temperature, flow velocity, humidity) and inner flow conditions of cryogenic fluid. The frost growth is mainly associated with the outer conditions. The frost thermal conductivity could play an important role in the froth growth. There is no great. The simulation for frost formation carried out with coupling to a commercial CFD code(CFX). The CFD simulation offers the possibility to predict frost formation within vertical geometries. The frost formation is based on the Lewis analogy of heat and mass transfer and it is embedded with CFX. The vertical surface temperature of the freezing body is determined by fluid structure interactive error method.
Simulation Analysis for Hydraulic Clamping Force of Bidirectional Hydraulic Lock' Valve Spool Based on Fluent
Authors: Zeng Qing Liang , Cui Jing , Zhao Wen Ming
Published: June 2012

Bidirectional hydraulic lock is a key component of hydraulic system of the truck crane[1]. By using Fluent software, this paper simulates and analyses the hydraulic clamping phenomenon, which happens in the truck crane outrigger bidirectional hydraulic lock's spool in the case of taper exists, as well as the center lines of spool and valve sleeve are eccentric, and the effect of different kinds of pressure-equalizing grooves on hydraulic clamping force, then concludes that the number, the shape and the size of pressure-equalizing grooves, and whether pressure-equalizing grooves are concentric can take effect on clamping force, thus a new way is prompted to improve the structure of bidirectional hydraulic lock.
Design of the Dry-Mixed Mortar Truck in Avoiding Segregation
Authors: Zheng Lei , Guo Li Na , Ji Hong Chao , Li Yao Gang
Published: June 2012

The way of dry-mixed mortar air-sliding has many advantages，such as improving transport efficiency, ensuring cement quality. But, dry-mixed mortar air-sliding may occur segregate, this phenomenon serious break the original ratio of cement, risking quality of cement[2]. This article suggested a new model of discharge opening with multi-holes, this model can allow dry-mixed mortar flow out at different height, and control the rate of flux in each port to keep mortar equally, this model eliminated the non uniforms caused by different height, eliminated the affection of segregate, ensure the quality of the cement.
Research on Pressure Drop Transfer Standard Based on CFD
Authors: Jiang Zhi Cai , Ding Xue , Zhao Hang , Su Zhong Di
Published: June 2012

The pressure drop transfer standard is a major measurement element in the pressure drop measurement device as a traceability element. This paper analyzed the air flow in the capillary tubes, and mathematical model of pressure drop transfer standard was got by the differential pressure at inlet non-laminar flow part and differential pressure in the laminar flow part. A CFD method adopting laminar model is used to confirm the theory. The pressure drop value was calculated by the diameters and length of all capillary tubes measured by OGP video measuring systems, and the result shows the calculated value was verified by the calibration value.
Numerical Study of Fluid Mixing in a Microchannel with a Circular Chamber on a Rotating Disk
Authors: Chiu Huan Chao , Chen Jerry M
Published: June 2012

This paper reports numerical simulations of fluid mixing in a rotating microchannel with a microchamber fabricated on a CD-like substrate. The sample fluids are driven by the centrifugal force and brought in contact at a Y-shaped junction, and then the mixing flow moves through a straight channel with a circular chamber where the main course of mixing takes place. The CD-like micromixer is rotated clockwise at speeds ranging from 300 to1200 rpm. With increasing rotational speed, the mixing efficiency is found dropping in the lower range (≤ 540 rpm), where the diffusion still dominates the mixing, and then grows progressively to reach as much as 90%. The progressively growth in the higher speed range significantly improves the slightly descending and flat distribution for a straight mixing channel without a circular chamber. This significant enhancement of mixing is due mainly to the vortices generated in the circular chamber and the strong transverse flow induced by the Coriolis force.
Study on the Pendulum Characteristic of Nature Convection in Dimensional Enclosure
Authors: Mei Chuan Zhi , Piao Lin Hua , Yu Quan Gang , Zhang Bao Li , Ding Xia , Wang Xing
Published: June 2012

In this paper, the pendulum characteristic of nature convection gas in dimensional enclosure is analyzed by FEM. Using ANSYS-FLOTRAN CFD program, the stream field and the temperature field caused by the point heat source, when the two-dimensional enclosure is inclined, has been obtained by a series of procedure, such as model building, meshing, loads applying and equation solving. The results are as follow: (1)Under the buoyancy lift affecting, the direction of nature convection gas always keeps the vertical upward in two-dimensional enclosure, nature convection gas has the pendulum characteristic. (2)When the dimensional enclosure is inclined, temperature distribution at the several points in dimensional enclosure will change with the tilt angle. The pendulum characteristic can be utilized to measure the tilt angle by the gas pendulum tilt sensor.
Establishment of Valve Control Mathematical Model of Hydraulic Differential Cylinder
Authors: Xin Ying , Yao Yao , Liu Ming , Zhang Wen Yu
Published: June 2012

From a practical point of hydraulic servo system, this paper researches on four-way servo valve working as three-way servo valve combined three-way pressure reducing valve forming differential form controlling asymmetric hydraulic cylinder characteristics using the classical control theory. According to the characteristics of hydraulic cylinder extends and retracts, it redefines the load pressure and load flow, establishes the load flow equation of control valve, the continuity equation of hydraulic cylinder and dynamic balance equations of the hydraulic cylinder which connected with the load, reaches the valve controlled asymmetrical cylinder system transfer function. Considering engineering practice, simplifying load types, it respectively obtains the transfer function of elastic load and none elastic load under the system which provides theoretical basis for analysing the static and dynamic characteristics of the valve controlled asymmetrical cylinder system.
A Comparison between Vector Control and Direct Torque Control for the Marine PMSM
Authors: Zhao You Tao , Liu Yan Cheng , Ren Jun Jie
Published: June 2012

In this paper the implementation of the vector control and direct torque control systems for a marine permanent magnet synchronous motor has been studied. A novel control method using space vector pulse width modulation was proposed. Then the simulation models with the vector control and direct torque control using the space vector pulse width modulation method have been established, respectively. Finally, the speed control performance of the systems was verified by simulation. The simulation results indicates that the systems used vector control or direct torque control technique can meet the requirements with the aspect of marine PMSM dynamic torque response. Meanwhile comparing to the different simulation results, the torque ripple was reduced in the vector control system.
Application of Contourlet in Research of Rough Surface Topography
Authors: Zhou Chao , Gao Cheng Hui
Published: June 2012

Since the tribology properties of rough surfaces are closely related to its topography, one of the most important ingredients in tribology research is to find an appropriate tool to analyze and characterize rough surfaces. The elementary theory of contourlet which is a good method for multi-scale and multi-direction signal analysis was introduced and an application of contourlet in rough surface analysis was demonstrated. It was found that contourlet is more sensitive to curved features than general two dimensional wavelets; it is possible to become a new powerful tool for rough surface analysis and characterization.
A Line and Arc Transition Tool Radius Compensation Algorithm for Convex Contour
Authors: Wang Chun , Lin Sheng , Peng Quan Hai
Published: June 2012

Tool radius compensation is necessary to CNC machining. However, B tool radius compensation leads to work piece burning at the sharp corner of convex contour because of the long time contacts between the work piece and tool, and C tool radius compensation frequently changes machining feed rate for its broken line tool path. This paper presents a novel tool radius compensation method suitable for high speed machining of convex contour, which have the advantages of both B and C tool radius compensation. It uses compound transition with line and arc between the adjacent blocks of CNC program. The offset tool paths of the adjacent blocks extend a small line segment respectively along their tangent direction, then insert an arc between the end points of the two extended line segments. The results of simulation and experiments show that the machining quality of the sharp corner of convex contour is improved and the machining time is shorter than C tool radius compensation.
Research of Embedded Open Soft-CNC System Based on Omponent
Authors: Xie Ou , Liu Yi Sheng , Cao Zi Yang
Published: June 2012

According to the design requirements of open CNC system,an open soft-CNC system design was proposed in this paper. The embedded microprocessor ARM and embedded operating systemμc/os-ii was used as the system development latform, introducing of hardware and software design ideas to complete the soft-CNC design and the software was packaged into components, simplified the system hardware architecture, improved the reliability, openness, and real-time of the system.
A Brief Analysis of NC Machine Tools Networking
Authors: Li Zhan Feng , Xu Jing
Published: June 2012

This paper emphasize the importance of informatization technology in NC machine tools field. Networking is playing an essential role in marketing research and analysis to make a new management system and more opportunities and profits.
Design and Application of NC Machining Template under NX/CAM Environment
Authors: Chen Qi , Liao Lin Zhi
Published: June 2012

In order to improve product manufacturing efficiency and quality, the paper brings up a method of building automatic programming template for the parts in same category with the help of an excellent programming platform --Unigraphics NX. It relieves automatic programming staff from repetitive work and improves the product manufacturing efficiency. The actual application result indicates that the method has certain practicality. Meanwhile, it also provides general design method for these similar parts.
Adaptive NURBS Interpolation with S-Shape ACC/DEC Control
Authors: Tian Jun Feng , Lin Hu , Yao Zhaung , Li Jie
Published: June 2012

Parametric spline interpolation has been widely used in CNC machining because of its advantages over linear and circular interpolation. However, the acceleration/decleration (ACC/DEC) may easily change beyond the machine tool drive’s ability due to abrupt change in feedrate profile. In this paper, an adaptive non-uniform rational B-spling (NURBS) interpolation with S-shape ACC/DEC control algorithm is proposed. In the proposed algorithm, the commanded feedrate is kept constant for most time and adaptively adjusted at the sharp corners to confine the chord error within a specified tolerance range during the interpolation process. The S-shape ACC/DEC profile is adopted to generate a smooth feedrate and satisfy the machine acceleration and deceleration capability. Simulation results for NURBS example are provided to verify the feasibility and advantages of the proposed scheme.
Smart Charge/Discharge Management System of a Portable Computer with Dual Batteries
Authors: Lv Yong Bin , Xia Bi Zhong , Zheng Wei Wei
Published: June 2012

A double-battery charging/discharging management system, which is applied in the notebook computer, is proposed and analyzed in this paper. The main circuit of the system is based on a charger chip and a micro card is used as an intelligent controller. The system controls the charge and discharge of double battery through software programming. Experiment shows that this system can fast and safe charge.
Compensation Strategy Research in Dynamic Voltage Restore
Authors: Ma You Jie , Sun Zhao Heng , Zhou Xue Song
Published: June 2012

The dynamic voltage restorer shows promise in providing a cost effective solution for the protection of sensitive loads from voltage sags. DVR as an important electrical installation has attracted many domestic and foreign researchers’ attention. The paper discusses the voltage compensation strategy in a DVR. At first the working principle and the basic structure of the DVR are described in detail, and then based on typical topology, the advanced theory analysis of DVR compensation strategy are put forward, and an overview of studies on the advanced compensation strategy is provided. Finally, the future research trends of the DVR compensation strategy are discussed.
Research on Identification of Narrow Bandwidth
Authors: Qiao Qian , Tang Wei , Bao Bin , Cheng You Xin
Published: June 2012

This paper addresses numerical problem when using poly-reference least square complex frequency-domain identification (p-LSCF) in narrow bandwidth. To solve this problem, a transformation using frequency scaling and shifting is proposed, which enable us to have a well conditioned p-LSCF algorithm. Finally, the cantilever test measurements are used to validate the conclusions of the paper. The results show that the enhanced p-LSCF algorithm with great numerical stability, clearer stabilization diagram and better modal identification.
Advanced Process Control Using Partial Least Squares
Authors: Fan Shu Kai S. , Chang Yuan Jung
Published: June 2012

This paper applies the partial least squares (PLS) technique to the multiple-input multiple-output (MIMO) semiconductor processes under the paradigm of the Advanced Process Control (APC). First, we present a controller called the PLS-MIMO double exponentially weighted moving average (PLS-MIMO DEWMA) controller. It uses the PLS method as the model building/estimation technique to help the EWMA controller to produce more consistent and robust control outputs than purely using the conventional EWMA controller. To cope with metrology delays, the proposed controller uses the pre-process metrology data to build up a Virtual Metrology (VM) system that can provide the estimated process outputs for the PLS-MIMO DEWMA controller. Finally, a Fault Detection (FD) system is added based upon the principal components of PLS, which supplies the process state for VM and the PLS-MIMO DEWMA controller to respond to the system errors.
Enterprise Asset Management Platform under Cloud Computing Mode
Authors: Song Yu Bo , Jiang Zhao Yuan
Published: June 2012

Enterprise asset management system can help to reduce operating costs, improve the management level of enterprise, and the relevant industry expert knowledge contained in this system can provide a unified management platform for all key assets of enterprise. To build an information center of enterprise asset management that is cross-industry and cross-area, cloud computing technology should be introduced to build cloud computing platform of asset management. The construction needs of asset management cloud platform are analyzed, and the cloud computing characteristics of platform construction is studied in this paper. Afterwards, the system architecture and key technologies of constructing the cloud computing platform for enterprise asset management are put forward.
Aided Design of Precision Seeder Based on Case Based Reasoning
Authors: Yang Yu
Published: June 2012

In connection with the low efficiency of traditional design method, case-based reasoning of artificial intelligence was applied in design of precision seeder.Combining with case representing based on characteristic method, determination method for resemblance level of machinery parts characteristics during case retrieval procedure was analyzed. Case-database was organized by MOP. The modified grey relational analysis was employed to calculate the seeder case similarity. A new case retrieval algorithm based on dynamic configuration was proposed. The weight for characteristic properties of the machinery parts was determined through standard deviation method and entropy weight method.Finally,the proposed model was demonstrated by an application instance of 2BQ-2 precision seeder. The results objectively revealed aided design method based on artificial intelligence can improve the design efficiency and shorten the design cycle effectively.
Design of WebGIS Application Based on Ajax
Authors: Chen Xian Jun , Li Xin Yin , Zhan Yong Song
Published: June 2012

In this paper, the development model and system architecture of WebGIS application based on Ajax is introduced. Combined with the platform of SuperMap IS .net, the developing method for WebGIS application is discussed in detail. By utilizing the technique of Ajax, the problem existed between Server and Client can be effectively solved, and the asynchronous interaction between Browser and Server is easy to be implemented. As a consequence, redundancy is decreased to enhance the Server performance.
Component Based WebGIS Development Framework
Authors: Chen Xian Jun , Li Xin Yin , Zhan Yong Song
Published: June 2012

Web Geographic Information System (WebGIS) has drawn numerous attentions from developers, and it has much effect on our lives for its combination of Internet and GIS technology. This paper presents a component based WebGIS development framework. In the proposed system, Supermap IS .Net is used as the basic platform, and ASP.NET as the web application development environment, where Ajax is considered as the method for asynchronous communication. Moreover, the technology of component is employed for the construction of an extensible framework for WebGIS applications.
The Network Management Data Model’s Design and Implementation in Communication Field
Authors: Chen Yan Ge
Published: June 2012

Starting from the significance and realization principle of data integration, puts forward a modeling method of network element object. According to the network element modeling principles’ abstract analysis on various network data, build the network element model on various data in network. The data integration network element model realizes combining XML with Java language.
Rice Edges Detection Based on Canny Operator
Authors: Qian Yue Jing , Fan Yuan
Published: June 2012

Rice edge detection is the first step on obtaining rice image feature. In this paper, an improved Canny edge detection algorithm was represented to obtain thin and robust rice edges. Firstly, nonlinear diffusion filter was used to wipe of noise efficiently and kept the edge information of the image. Secondly, gradient calculation of pixel diagonal direction was considered in the calculation of neighborhood gradient amplitude which further repressed the impact of noise. Thirdly, using average interclass variance could self-adaptively calculate the double thresholds for different images. The results of the experiment indicate that the improved algorithm has a better accuracy and precision in the edge detection.
Wireless Communication Technique Applied to Coal-Transport System
Authors: Liang Wei Ping , Zheng Zhen Gang
Published: June 2012

The traditional coal-transport system for the power plant is a semiautomatic system based on relay and manual way.The belt is often deviated and ripped due to the large range of coal-transport system.There are interpreted the function of wireless telecontrol used on coal-transport system , the system building up and the radio information for applying this technique.
Segmentation Algorithm of Traffic Prohibited Area Based on Wavelet
Authors: Zhao Wen Dong , Qi Hui , Zhou Hai Yan
Published: June 2012

The status of transportation industry development of China has shown the necessity and urgency of the development of intelligent transportation systems. This article proposed a segmentation algorithm of traffic prohibited region based on wavelet transform. Based on the de-noising and image enhancement, sharpening pretreatment of the traffic video image captured on real-time, the algorithm combines the method determining the quadrilateral based on the sample images manually with the image segmentation based on wavelet transform in order to get the segmentation of traffic prohibited region which will be used in the detection of vehicle pressing highway central line region. The experimental results show that in the algorithm not only meet the real-time requirement of foundations but also improves the successful rate of detection results.
Using a Multilayer Perceptrons Neural Network and Genetic Algorithm to Predict the NTD/USD Exchange Rate
Authors: Huang Han Chen
Published: June 2012

In recent years, the global community has experienced economic difficulties, such as the 2008 financial crisis and the ongoing European debt crisis. Consequently, currency values have fluctuated significantly over short periods of time, which increases the difficulty of survival and fear of businesses that rely on import and export trade. Failure to properly and appropriately address the operational risks of exchange rate fluctuations can reduce corporate profit and even lead to operational losses. However, financial markets provide numerous methods for corporations to hedge the risks of exchange rate fluctuations. Nevertheless, a model for predicting exchange rate fluctuations can enable business owners to make more appropriate judgments. This study employs a multilayer perceptions (MLP) neural network with genetic algorithm (GA) to predict the New Taiwan dollar (NTD)/U.S. dollar (USD) exchange rate. The GA is used to determine the optimum number of input and hidden nodes for a feedforward neural network, the optimum slope of the activation function, and the optimum learning rates and momentum coefficients. The empirical results show that the ability of the proposed model to predict the NTD/USD exchange rate is excellent. The absolute relative error between the predicted value and the actual value was 0.2948%, and the correlation coefficient was 0.994802.
Domain Decomposition Method for the Variational Inequality of the Second Kind
Authors: Zhu Jun Hui , Cheng Chun Rui
Published: June 2012

Domain decomposition method for solving the discrete problem of the second kind of variational inequality is considered. The variational inequality is reformulated as an equivalent optimization problem. Then the overlapping domain decomposition method is proposed. The convergence of the methods is obtained.
Application of Neural Network Based on Genetic Algorithm to Predict Hypotension Events during Spinal Anesthesia
Authors: Qiu Yu , Dai Hai Jun
Published: June 2012

An accurate and efficient artificial neural network (ANN) based genetic algorithm (GA) is presented for predicting hypotension during general anesthesia. The genetic algorithm global optimization characteristics are used to optimize the BP neural network weights, and learning samples are trained and modeled by BP neural network with optimal parameters. The simulation experiment is carried out with MATLAB. The result indicated that the model forecasting results are close with the actual results and meet the accuracy requirement to General Anesthesia.
Research and Development of Automatically Generating and Editing Software for Ventilation Network Drawings
Authors: Liu Fang Bin
Published: June 2012

In order to change to current situation of difficult to draw ventilation network drawings and reach the purpose of high-efficiently generate ventilation network drawings, after the study many kinds of current drawing methods, the technology of automatically generate and edit ventilation network drawings using the method of AutoCAD secondary development based on .Net Framework is put forward. Focus on the principles and algorithms of automatically generate and edit ventilation network drawings, and based on this, a software is developed and applied. The application results show that the ventilation network drawings generated by the software is completely comply with rules of drawing ventilation network drawings. At the same time, taking advantage of step imitating technology, the function of dynamic and visual edition is realized. This method and software meets the demand of on-field engineers to draw ventilation network drawings and greatly improve the working efficiency.
Ontology-Driven Requirements Elicitation Based on Scenario
Authors: Fan Zhi Jun , Jiang Zhao Liang
Published: June 2012

For the completeness and accuracy of customers' requirements information in the mass customization paradigm, a method of ontology-driven personal requirements elicitation based on scenario was proposed. Firstly, customer scenario model and product requirements model based on ontology theory were constructed respectively. Association rules were mined with Apriori algorithm using the method of metarule. Scenario ontology was mapped to requirement ontology completely. Then, customers' personal requirements information was elicited completely and accurately. Finally, industrial case study has been performed to demonstrate the practicality and effectiveness of the proposed approach.
Random Censored Data MLE of Weibull Distribution Based on Simulink
Authors: Shi Jing Zhao , Shao Rui Na , Li Xiang Fu
Published: June 2012

Maximum likelihood estimation (MLE) is a commonly used method of Weibull distribution, but it needs to calculate the transcendental equations which is based on the computer programming. In this paper, we established a new MLE model of Weibull distribution in a case of random censoring. And this model was proved feasible and correct via three examples. At the same time, the model can be used for a variety of censored data and complete life data of Weibull distribution of MLE.
Heterogeneous Strategy and its Application in an Improved Micro-Genetic Algorithm
Authors: Yan Le Wei , Chen Yang Yang
Published: June 2012

Heterogeneous strategy, population isolation, arithmetic crossover and optimum reserved strategy are used to improve micro-genetic algorithm (mGA) in this paper. Heterogeneous strategy is used to improve the probability of convergence to global optimal solution and quicken up the convergence. Reset frequency is decreased while the global and local searching capabilities of mGA between two resets are enhanced, which makes mGA searching the parameter space intelligently as the mode recognition information is preserved as much as possible. Adaptive random mutation, which used existing genetic information of the current groups, is used to increase efficient search. Finally, standard functions testing demonstrate that the improved mGA can find better optimum solutions with less computing cost than standard genetic algorithm (SGA).
Multi-Mode Switching Control of Networked Control System Based on Hidden Semi-Markov Model
Authors: Yan Ying , Wang Li Kun , Wang Yan
Published: June 2012

This paper applies hidden semi-Markov model (HSMM) to estimate the network load states on the basis of time delay observations for multi-mode switching control of the NCS. The close-loop NCS with state feedback controller is modeled into a semi-Markov jump linear system (S-MJLS). Then the controllers corresponding to each mode are designed based on the stability theory of S-MJLS. Simulation results show the effectiveness of the proposed approach in this paper.
An Overview of Grid-Connected Photovoltaic Power Generating System
Authors: Zhou Xue Song , Wu Jia Rui , Ma You Jie
Published: June 2012

With the traditional energy exhausting rapidly, the development of new sustainable energy especially solar energy has a significant meaning. The paper mainly introduces some characteristics of photovoltaic (PV) power generation system involving in its development, construction and key technology. Solar cells can supply power energy through absorbing sunlight. As a result, some key technologies such as maximum power point tracking (MPPT), islanding detection and energy conversion are concerned by many investigators. Finally, this review gives some conclusion and prospective of PV power system.
Study on Application of PLC and Inverter in Blown Film Extrusion Production Line Control System
Authors: Li Xue Zhong , Xie Zhi Yu
Published: June 2012

Through analysis of the blown film extrusion production line process, according to the extrusion machine temperature, speed and membrane bubble cooling and tension control, and other aspects of control characteristics, using Mitsubishi FX2N series Programmable Logic Controller (PLC) and INVT inverter as an example, this paper expounds the application in the blown film extrusion production line control system.
Development of Air Flow Control System for Large-Scale Pre-Oxidation Furnace
Authors: Yu Kuan , Zhu Bo
Published: June 2012

In this paper, we introduced a high cost performance design of air flow control system consisting of a programmable computer controller (PCC) and 72 inverters. PCC communicates with all the inverters using USS protocol via RS485 bus, and the real-time performance of USS communication was analyzed for this system. The commissioning and analysis show that the total communication cycle time of a subnet is less than 500ms and the maximum deviation of the inverter frequency is 0.01Hz. This system can meet the requirements of high performance carbon fiber production.
Existence of Extremal Solutions for Impulsive Delay Fuzzy Differential Equations in n-Dimensional Fuzzy Vector Space
Authors: Kwun Young Chel , Youm Hae Eun , Koo Ja Hong , Park Jin Han , Seo Jong Jin
Published: June 2012

In this paper, we study the existence of extremal solutions for impulsive delay fuzzy differential equations in n-dimensional fuzzy vector space. This is an extension of the result of Kwun et al. [2] to impulsive fuzzy differential equations with delay condition.
Design of Trash Rack Water Level Measurement and Control System Based on Ultrasonic
Authors: Cheng Hai Yu , Wang Hui
Published: June 2012

Designed a new type measurement and control system based on ultrasonic sensor, which can measure the water level of hydropower station turbine inlet trash rack in front of the dam. It overcomes the defects of traditional level gauge measurement; has the water level signal after and before the gate on real-time; pressure difference; multiple points of data acquisition; processing, storage and transmission of the limit alarm function, the subsystem and hydropower PC form communication network for the centralized monitoring, centralized control and centralized management.
An Approach Based on Power Generalized Aggregation Operator to Decision Making
Authors: Park Jin Han , Seo Jong Jin , Kwun Young Chel , Koo Ja Hong
Published: June 2012

The power average (PA) operator and power generalized mean (PGM) operator, proposed by Yager [15], are the nonlinear weighted aggregation tools whose weighting vectors depend on input arguments. In this paper, we study the power generalized mean (PGM) operator and its weighted form, and develop a power ordered weighted generalized mean (POWGM) operator, and study some properties of these operators. The relationship between the PGM operator and other existing operators is also discussed. Moreover, we utilize the weighted PGM operator to develop an approach to group decision making.
Gearbox Fault Diagnosis Based on EMD and Coefficient-Energy Value
Authors: Wang Ping , Zhang De Xiang , Liu Yan Li
Published: June 2012

This paper applies the empirical mode decomposition (EMD) methods to gearbox vibration signal analysis capture from vibrating acceleration sensor for gearbox fault diagnosis. The original modulation fault vibration signals are firstly decomposed into a number of intrinsic mode function (IMF) by the EMD method. Then the fault information diagnosis of the gearbox vibration signals can be extracted from the coefficient-energy value of intrinsic mode function. Experiment result has shown the feasibility and efficiency of the EMD algorithms and energy characteristic method in fault diagnosis and fault message abstraction. It is significant for the monitor operating state of gearbox and detects incipient faults as soon as possible.
Gearbox Fault Diagnosis Based on Empirical Mode Decomposition and Hilbert Transform
Authors: Liu Yan Li , Zhang De Xiang , Ji Ming Wei
Published: June 2012

Gearbox is vital components in a wide range of industrial and transport applications. It is very important how to monitor operating state of automobile gearbox and detect incipient faults. This paper applies the empirical mode decomposition (EMD) and Hilbert spectrum methods to gearbox vibration signal analysis capture from vibrating acceleration sensor for gearbox fault diagnosis. The original modulation fault vibration signals are firstly decomposed into a number of intrinsic mode function (IMF) by the EMD method. Then Hilbert spectrum of intrinsic mode function at different fault characteristic frequencies is obtained by Hilbert transform. Finally, the time-frequency fault characteristics of gearbox are analyzed by the Hilbert spectrum value of intrinsic mode function. Experiment result has shown the feasibility and efficiency of the EMD algorithms and Hilbert spectrum characteristic method in fault diagnosis and fault message abstraction.
Research on the Algorithm of Post-Processing with Space Tool Compensation Vector in Five-Axis CNC Machine
Authors: Gao Wei Qiang , Huang Xiu Wen , Hu Ze Hua , Zhang Jing , Song Jun Hua , Xu Hui Xin
Published: June 2012

This paper aims at A-C axis dual rotary working table five-axis CNC system, does some research about the calculating method of space tool compensation vector in five-axis CNC machine. The algorithm of post-process of five-axis CNC machine has been analyzed. The special postprocessor based on five-axis cutter location source file(CLSF) which generated from UG NX 6.0 software has been developed and applied, and there are space tool compensation vectors in the five-axis NC code. Taking blade as machined part for example, NC code machined simulation is verified in Vericut7.0 software, and space tool compensation vector for graphic simulation is analyzed. The actual calculating results indicate that the proposed method is correct and feasible.
Description Logics in Information Semantic Integration for Product Design and Manufacturing
Authors: Hu Zhi Ming , Wang Zhong Qi , Li Ning , Wang Hui Ping
Published: June 2012

In the process of information semantic integration for product design and manufacturing, it is very important to express the product information semantic. Description logics (DLs) are a family of state-of-the-art knowledge representation languages, and a decidable subset of first-order logic. Firstly, by analyzing the characteristics of product information, proposed a semantic information description framework based on description logics for product information integration, which is divided into three levels: basic description logic, classic extended logic and unusual extended logic. Then, in the framework, reducer was taken for example to illustrate the application of their description logic in product design and manufacturing formal semantic information. Finally, based on description logic, discussed reasoning problems of product design and manufacturing information.
Resource Conflict Resolution Strategy in Collaborative Design Environment
Authors: Li Hai Tao , Yang Bo , Wang Wei , Gao Chang Qing
Published: June 2012

Shortcomings of current conflict resolution methods in solving the problems of disordered competition for design resource in networked design environment are analyzed. By introducing the design structure matrix (DSM) to the planning process of design task, a mathematic description model in collaborative design considering the conflict causes as resource conflict, process conflict and design conflict is given. The reconstruction method of the DSM as well as the DSM based matrix search algorithm is given, based on which the problem of design locking and long waiting because of limited resource in the collaborative design process can be successfully solved. Finally, the design of a bridge crane is used as an example to demonstrate the successful application of the proposed resource conflict resolution strategy in collaborative Design environment.
The Exploration of Recycling of Industrial Products Based on Modularization
Authors: Liu Ling
Published: June 2012

This article focuses on product modularization design based on industrial product recycling, and will discuss the meaning and importance of modularization design in environmental protection and energy conservation. The method and essential technology of utilizing modularization design in product recycling are also explored and summarized, and it is argued that the possible benefits include pollution reduction, energy conservation and environmental protection.
The Recycling of Plastics from ELVs - Background, Practices and Potentials
Authors: Gu Fu , Hall Philip , Wu Tao
Published: June 2012

The proportion of plastic components in automobiles has increased over past few decades. With the pressure of legislation on treatment of end-of-life vehicles (ELVs) and economical and environmental concerns, the management of plastic scrap in ELVs is becoming an important issue. This paper reviewed utilization of plastics in automobile production and traditional management of components from ELVs, with introduction of new legislation problems have been identified in the recycling of plastic from ELVs. Some examples of closed-loop recycling of plastic automobile parts are presented, and the potentials of using recycled plastics in automobile production are also discussed.
Method of Product Innovation Acquisition Based on Dynamic Response Particle Swarm Optimization
Authors: Yin Yan Chao , Huang Ya Yu
Published: June 2012

In order to accurately locate the changing demands and objects of customers, a novel mining algorithm was presented to predict the Optimum Customer Demand (OCD) in the uncertain front end, which can be formulated as a dynamic nonlinear optimization problem. The improved Particle Swarm Optimization involves accurately detecting the changes all of the search space and reliably updating obsolete particle memories, which has been shown to be effective in locating the changing plentiful innovative thinking. Finally, the algorithm is applied into the prediction of customer demands in car’s appearance feature, which effectively guide the implementation of product innovation and greatly improve the front end performance.
Implementation of the Lean Model for Carrying out Value Stream Mapping and SMED in the Aerospace Engine Case Production
Authors: Wang Chen Hua , Kao Jar Her , Kumar Thakur Sanjay
Published: June 2012

The lean manufacturing has been widely applied in the most of the industry sectors. Single Minute Exchange of Dies (SMED) is one of lean manufacturing tools that can be used to further reduce production waste. In order to ensure waste be effectively reduced, lean manufacturing has tools to achieve its goal. The first step is analysis of current state value stream map from the production line. The second step is the use of Single Minute Exchange of Dies to propose and carry out improvement actions in bottleneck process. In this study, the aerospace engine case production lead time was reduced from 9 weeks to 7 weeks by VSM method. The SMED method was applied to improve bottleneck’s setup time from 95.68 minutes to 76.97 minutes. The lean manufacturing tool can help factory to reduce inventory in the WIP.
Disclosure of Internal Control Based on XBRL
Authors: Chen Hong Ming , Li Fen Gui
Published: June 2012

This article is mainly to study on the necessity of implementing the internal control, and proposed some solutions to address the development of the internal control.First,We described the problem of implementation "basic norms of internal control";secondly, We proposed a new solution named XBRL for the disclosure of internal control information, and then we did some empirical research on the application of XBRL in China,The research showed that XBRL had improved the quality of corporate disclosure.
Research on Manufacturing Execution System
Authors: Gao Wei Zeng , Zhu Yan Li , Gu Yue Sheng
Published: June 2012

The manufacturing execution system (MES), is now still constructed with relatively dedicated framework. Such lag in the development of MES has inevitably caused some problems. A salient one is the lack of adaptability to effectively cope with the diversity of manufacturing processes. This paper aims to provide some resolutions to this problem. After analyzing the adaptability requirements of A-MES in detail, some key techniques are researched including data integrated adapter, developing configurable factory model, reusable business component and data based script driven mechanism. Thereafter, a new kind of adaptable MES framework named A-MES is presented. A-MES is capable of accommodating changes in internal and external manufacturing system with little programming work.
Based on Industrial Engineering Production System Analysis and Improvement Research
Authors: Zhao Ling
Published: June 2012

The paper is focus on the assembly line of the factory .The nodular method and second-watch measuring methods are applied to measure the work time of the bottleneck stations. To improve the cycle time of the assembly line, the work contents of relative stations is reallocated. Finally, the production line is disposed again on the basis of the principle of ECRS and the line balancing theory .After implemented the new method, the capability of this production line has improved.