bluuebunny/crossref_metadata_2025 huggingface dataset:
Automaton Fault Diagnosis Based on Motion Morphology and Information Entropy
Authors: Pan Ming Zhi , Pan Hong Xia , Zhao Run Peng
Published: October 2011

Online monitoring and fault diagnosis is an important link of guaranteeing the equipment smooth operation and reliable working, which receives general concern. This subject uses the strategy of combining theoretical research and experimental research, and establishes a set of automaton fault diagnosis theory and method based on motion morphology and information entropy. It solves the following problems, the weak fault signals in the short-time and transient vibration response signals are easy to be drowned in practical application, effective and sensitive characteristic parameters are difficult to be extracted, accurate positioning of fault and real-time diagnosis are difficult to be realized. Use the motion morphology and information entropy to put forward new ideas and methods for the short-time and transient vibration signals analysis processing and feature extraction, and is applied in artillery automaton field, which expands the research scope of mechanical fault diagnosis subject.
Driving Control of Planetary Rover Based on Slip Ratio Estimation
Authors: Li Lin Hui , Zhao Yi Bing , Lian Jing , Wu Shu Mei
Published: October 2011

Slip-sinkage is one of the main factors influencing the driving safety of planetary rover in soft terrain. In the environment of scarce features, based on the stereo visual sensors, the visual odometry algorithm is firstly developed to calculate the position changes of planetary rover with six degrees of freedom, which combine with the wheel speed sensor achieve the estimation of wheel slip ratios. Then, on the basis of mechanical analysis of soft terrain, choosing the slip ratio as the state variable, the coordinated driving control algorithm is designed. Simulation and experiment results demonstrate the effectiveness of the proposed control algorithm.
Dynamic Modeling and Analysis of Guideway Joint of Engraving Machine
Authors: Jin Xiao Li , Ma Bao Ji , Feng Tao
Published: October 2011

Combined the theory research with the actual force and deformation of the guideway joint, the isoparametric eight-node contact element is proposed, the element reflects the joint characteristics of guideway of engraving machine. A finite element model of guidway joint is build. The fundamental parameters of the contact element are deduced by finite element method, which can apply with the performance prediction of the whole engraving machine in the process of design.
Fabrication and Mechanical Testing of the Aluminum Foam Produced by Sintering and Dissolution Process
Authors: Gilani Hossein , Jafari Sajjad , Gholami Roozbeh , Habibolahzadeh Ali , Taheri Mohammad Mahdi
Published: October 2011

In the present study, fabrication of the aluminum (Al) foam through sintering and dissolution process and effect of space holder (NaCl) mean size on compressive behavior of metallic foam has been investigated. Due to improper cold bonding between Al particles in low compaction pressure spalling of the foam was observed. Appropriate compacting pressure and sintering temperature of the compacts resulted in production of high quality Al foams. SEM was used to characterize the morphology of produced Al foam and mechanical behavior of produced foams was evaluated using compression test machine. The results show that open-cell Al foam free from cracks was obtained and an increase in NaCl mean size resulted in increases of the compressive strength, Young modulus and plateau stress of the stress-strain curves.
Flexure Hinge Guided Motion Gripper with Force Sensor
Authors: Ma Li , Xu Ci Xiong , Zhou Sha Sha , Rong Wei Bin , Sun Li Ning
Published: October 2011

A piezoelectric gripper with force sensor is presented for an optical precision manipulation. The gripper utilizes flexure hinge mechanisms with two-step amplification to achieve output displacement. Micro displacement amplification principle of the gripper is analyzed and verified using finite element analysis (FEA) soft. A force sensor of resistance strain type with elastic plate structure of bi-cantilever is designed, which is fixed at the bottom of the gripper to detect force signals during the working process. The strain foils adopt a connecting method of full-bridge. According to theoretical analysis and FEA of the force sensor, bonding positions of the strain foils are determined. Experimental results indicate that the sensor has good linearity and little temperature drift and creep, and its resolution is less than 100mN. Micro-vision method is used to test the gripper, and maximum displacement is 302μm.
The Reverse Engineering and Rapid Prototyping Manufacturing Technology of Parts with Complex Surface
Authors: Fu Ze Min
Published: October 2011

According to the combined application of the reverse technology and the rapid prototyping , which is necessary for the complex design and the concept design of part surface, the text firstly introduce the method of gathering reverse data by ATOS measuring system and the technology of blending triangular Bezier surface . Second, it analyses the optimized disposition of method of reverse data which is related to the technology of rapid prototyping . Third, the trial has been done about the interface files generated and linked the device of rapid prototyping and model processing trial.
Theoretical Analysis and Engineering Improvement Test Verification of the Crack Problem in the Back Van of the Vehicle
Authors: Yang Guo Quan , Zhao You Qun , Li Jun Yan
Published: October 2011

This paper discussed the theoretical analysis and engineering improvement test verification of the crack problem in the back van of the vehicle. Causes that may result in the crack problem are firstly analyzed and then determined by the finite element analysis. Improvement are given and proved to be effective by the test verification of an improved vehicle. The method used in this paper will contribute to the analysis and solution of the crack problems in some parts of the vehicle and has reference value in engineering application.
Research on Hybrid Hydraulic Excavator Test Bench
Authors: Zhao Ding Xuan , Xu Miao , Liu Peng , Xu Chun Bo , Lin Ming Zhi , Dai Qun Liang
Published: October 2011

Hydraulic excavator energy saving is one of the dominating problem that trouble construction machinery industry. Hybrid technology brings forward a new solution for this puzzle. In the research of hybrid hydraulic excavator, we set up a parallel hybrid excavator test bench based on modular-design method, this fills a domestic technology gap. Power-train performance test is undertaken on this bench and the power assist control strategy is proved to be significant energy saving.
Static and Dynamic Finite Element Analysis on the Steering System of Automobiles
Authors: Guo Li Xin , Ji Guang Hao , Zhao Lei Ping , Li Jin Li
Published: October 2011

The steering system of automobiles might vibrate under external excitation loading. Severe vibration of the steering system maybe bring the drivers uncomfortable and even result to noise and damage of some parts of the steering system. In the same time, it can not be satisfied with NVH design requirement of automobiles. In this study a three- dimensional finite element model of a steering wheel of automobiles was established and finite element static and dynamic analyses were conducted in order to validate dynamic characteristics and strength of the steering system. The simulation results can provide a reference for structural design of the steering system.
Study on the Application of Modularity Design in Milltary Products
Authors: Zeng Tian , Zhang Zhi Hua
Published: October 2011

Modularity design is a comon method in product design.This essay is about the analyzing of the application of modularity in military product design,study on the developing trend and value of modularity in military products by analyzing the advantages of moularity and it’s major features in military products.
Study on the Optimized Cutting Parameters for the Nuclear Channel Head
Authors: Yu Zhong Hai , Chen Tian , Liu Di Shi , Wang Jing
Published: October 2011

As one of the key components of the nuclear power equipments, the nuclear channel head has a complicated shape and is difficult to be machined. In this paper, the optimal combination of cutting parameters of large-scale nuclear channel head is researched. Considering the machining requirements and machining conditions, the cutting parameters optimized mathematical model is established to achieve the goal of maximum production efficiency. Meanwhile, the target functions and the corresponding constraint functions are analyzed. Finally, by using genetic algorithm of simulating biological evolution, the mathematic models of cutting parameters of CNC machining are compared and optimized. Then the optimized results are compared with the cutting parameters obtained through the trial-producing experience and manual of a small-size channel head. We conclude that the optimized cutting parameters can greatly increase the CNC machining efficiency of Nuclear Channel Head.
Research on Equipment Virtual Maintenance Technology
Authors: Cheng Xu De , Lei Lei , Zhang Jian Hu , Peng Wei , Cui Xin You
Published: October 2011

With the development and application of automation and information technology, missile equipment become increasingly sophisticated and complex, combined with cost, quantity,safety and other factors, maintenance and support the missile equipment face enormous challenges.This paper introduce firstly the virtual maintenance technology, and then propose the main functions and tasks of missile equipment virtual maintenance system based on virtual maintenance technology and take active interest in the development and application of domestic and foreign research results.
The Detection of Avalanche Propagation in Engineering Change
Authors: Mo Rong , Gong Zhong Wei , Yang Hai Cheng , Zhang Xin
Published: October 2011

In order to avoid avalanche propagation in engineering change that is high-risk and high-cost, two methods for the detection of avalanche propagation were proposed. Firstly, analyzed the reasons for the avalanche propagation and its main features: constraint conflict and/or a great many affected elements. Then, the methods for the detection of those two features based on directed graph and complex networks respectively were proposed. Finally, the experiment of managing a type of transmission was employed to validate our method and it showed the correctness of the proposed method.
Research on Vibration Properties of Honeycomb Paperboard with Double Cross-Core
Authors: Wang Bao Zhong , Sun Zhao Dan , Cao Li Jie
Published: October 2011

Studied the vibration performance of honeycomb paperboard with double cross-core, obtained vibration transmissibility curve of honeycomb paperboard with double cross-core, by the curve indicated, the vibration transmission properties of the honeycomb paperboard with double cross-core in the sinusoidal excitation ,and the packaging materials as contents when the size of the protection capacity. The results show that the shock resistance capacity of honeycomb paperboard with double cross-core is supers the single layer with the same thickness of.
The Research of Canal Fuzzy Self-Adapting P+PR Controller of Long Distance Water Diversion Project and Applications
Authors: Han Yan Cheng
Published: October 2011

Canal control algorithm is very import in the process of water delivery. The paper presents a parameters-self-adapting canal flow fuzzy P+PR control according to the merits of fuzzy-control and the features of P+PR control algorithm through fuzzy inference method. The model uses the canal automation history control experiences to realize the optimization of parameters and make the control process always running in the optimal state. The parameters of fuzzy rule-table are built, the solution processes are deduced. The simulation results show that the overshoot is reduced significantly, and the dynamic behaviors are improved by using this adaptive fuzzy P+PR control model.
The Research of Gear Reducer Fault Diagnosis in Coal Mine
Authors: Zhang Jun , Xue Guang Hui , Wu Miao
Published: October 2011

According to the detection and monitoring requirements of the mechanical equipments used in coal mine, this paper achieves the state signal acquisition of the mechanical equipments in coal mine by using self-research portable intrinsically safe recorder of vibration measurement used in cool mine, and uses the vibration signal analysis technology to analyze the obtain signal, actualizing the running condition detection and monitoring of the mechanical equipments in coal mine. This paper presents a method for fault diagnosis of the gear reducer in coal mine.
An Association-Analysis Based Web Mining Preprocessing Algorithm
Authors: Ma Dong Lin , Gao Wei Jun
Published: October 2011

Aimed to overcome the deficiency of abundant data to web mining, the paper proposed an association-analysis based algorithm. Firstly, we construct the relation Information System using original data sets. Secondly, make use of attribute reduction theory of Rough sets to produce the Core of Information System. Core is the most important and necessary information which cannot reduce in original Information System. So it can get a same effect as original data sets to data analysis, and can construct classification modeling using it. Thirdly, construct indiscernibility matrix using reduced Information System, and finally, get the classification of original data sets. The experiments shows that the proposed algorithm can get high efficiency and can avoid the abundant data in follow-up data processing.
A Multi-Hop Grouping Scheme for Assisting Handoff Procedure in Vehicular Networks
Authors: Jin Yan , Rim Kee Wook , Kim Kee Cheon , Wei Min
Published: October 2011

The duplicate address detection (DAD) has been a time-costly and a bottleneck in IP address configuration. The dynamic host configuration protocol (DHCP) was proposed and adopted to effectively assign unique address to a host. However, DHCP is not suitable for networks with a large number of nodes, and address renumbering under DHCP would be much more complicated than that under stateless auto-configuration. In vehicular networks, moving vehicles get connected to the Internet through the access point set up by the road. The handoff operation is supposed to happen frequently due to the fast moving of vehicles. Therefore, the performance of handoff becomes one of the most important issues to maintain seamlessly connection to the Internet in vehicular environment. In this paper, we propose a multi-hop group assisted handoff algorithm to effectively reduce handoff latency for avoiding the impact of time-consuming from IP configuration operation.
Spraying Research on the Resistive Film of Angular Displacement Sensor Made from Conductive Plastic
Authors: Yu Zhi Gen , Zhou Bai Qing
Published: October 2011

The conductive plastic is widely used in making sensitive materials such as angular displacement sensors with high-precision. The resistive film of the sensor is formed by spraying and its quality has a close relationship with the resistance liquid’ density, spraying pressure and time, and drying temperature and time. We draw a conclusion from experiments that for the conductive plastic with carbon fillers, the optimal linearity is obtained under a pressure of 0.5-0.6Mpa in 6-8 seconds and the best abrasion resistance is obtained at a drying temperature of 175°C in 4 minutes when the liquid resistance contains 15% carbon. While for the conductive plastics with metal fillers, the optimal linearity is obtained under a pressure of 0.7-0.8Mpa in 5-6 seconds, and the best abrasion resistance is obtained at a drying temperature of 165°C in 4 minutes when the liquid resistance contains 6% metal fillers. The research results have some guiding significance in improving performance and lowering cost.
A Novel Approach of Detector Generation for Real-Valued Negative Selection Algorithm
Authors: Hu Rong Hua , Lou Pei Huang , Zhao Peng
Published: October 2011

The detector sets generated by Real-Valued Negative Selection Algorithm (RNSA) are usually numerous, without optimization, and can not work under real-time condition. Thus, a novel approach of detector generation for RNSA based on Clonal Selection and Neighborhood Search (CSNS-RNSA) is proposed. Clonal selection of the immune mechanism is introduced to implement global search in a quasi-random sequence. The Gaussian mutation operator is proposed to get the global optimal detection sets of N-dimensional space through Neighborhood search. The resulting detector sets achieved a good coverage of non-self space, and also significantly reduced the number of detector sets, thus overcome the limitations of original RNSA. Finally, experiments verify the effectiveness of the algorithm.
Bond Strength Analysis among Layers of Grinding Wheel
Authors: Peng Wei , Yao Chun Yan , Xu Xue Feng
Published: October 2011

A novel technology is studied in this paper to make photosensitive resin grinding wheel based on layered manufacturing technology. The bond strength among resin layers is analyzed. An effective measure is proposed to improve the bond strength among resin layers of the grinding wheel. We add magnetic abrasive particles into the liquid resin to get rough surface and increase contact area by action of magnetic force. Some experiments are curried out for testing shear strength of resin with magnetic abrasive under different conditions. Results show that this method had a significant effect in improving the bond strength among layers of new grinding wheel.
Design and Implementation of ETL in Police Intelligence Data Warehouse System
Authors: Shen Liang Zhong , Liu Shi Hua , Chen Sheng Kai
Published: October 2011

In the light of Information Island phenomenon existing in the current police system and inadequate excavation of data, this paper advances the necessity of establishing police intelligence data warehouse system. Vs.net 2008 and SQL Server 2008 are used to design and implement the police intelligence data warehouse system, and more over probes deeply into the technology of ETL.
Fault Prediction and Health Management for Mechanical Equipment Groups Based on the Internet of Things
Authors: Xu Xiao Li , Chen Tao , Zuo Yun Bo , Wang Shao Hong
Published: October 2011

Safety operation of mechanical equipment groups is of great importance to production and human resources as well as environment. In order to ensure safe operation and improve intelligent level of early fault prediction for key mechanical equipment groups, this paper proposes fault prediction and health management based on the internet of things with structure of three layers to realize comprehensive perception, reliable transmission and intelligent processing of the fault information from the mechanical equipment groups. Two key technologies like condition monitoring and fault prediction are analyzed and application prospects of fault prediction and health management for mechanical equipment groups based on the internet of things are presented in this paper.
Using the Simplified 3D DIC Method to Measure the Deformation of 3D Surface
Authors: Tung Shih Heng , Kuo Jui Chao , Shih Ming Hsiang , Sung Wen Pei
Published: October 2011

In recent years, 2D digital image correlation method (DIC) has been widely used in the measurement of plane strain. However, out-of-plane displacement could be induced during the loading and it would affect the measurement accuracy. Thus, a 3D measurement is necessary. This study utilizes a simplified 3D DIC to measure the geometry of an object before and after deformation. Then the finite element concept is involved to determine the strain after deformation. A flat plate specimen with in-plane and out-of-plane displacement is observed. Both 2D and 3D DIC are used to analyze the strain. The results show that using 3D DIC to measure strain is feasible and with a very good accuracy.
Investigation on Local Optical Parameters of Liver Tumors in Laser-Induced Thermotherapy
Authors: Dai Li Juan , Hua Guo Ran , Qian Ai Ping , Qian Zhi Yu
Published: October 2011

The method to investigation the changes of optical properties and evaluating the effect of laser application in real time is presented in this paper. In vivo measurements of the reduced scattering coefficient (μ’s) and tissue temperature (T) were performed with a functional near infrared spectroscopy (fNIRS) system and a temperature measurement system during LITT. Mice liver tumors were examined in vivo in different laser doses (0.8W, 1.0W, 1.2W, 1.4W) at a certain heating time (600s). The results showed that there were the same rising tendencies of the reduced scattering coefficient and temperature during LITT. They increased quickly at the beginning, gradually reached a stable state, and rose faster when the laser power was greater. When the tissue temperature was in the range of 50°C to 70°C, there was a clear linear relationship between μ’s and T. The linear equation was obtained for the first time.
IT Performance Key Factors Extraction Based on PCA Selective Ensemble
Authors: Hu Ming Yan , Guo Wei , Zhao Nan
Published: October 2011

The IT performance evaluation is a complex analysis system. Some key factors that can reflect the essential characteristics and be easy to acquire, should be extracted to help us to clarify evaluation, analysis and diagnoses. In this paper for the uncertainty of IT performance data, an algorithm of IT performance key factors extraction based on selective ensemble of principal component analysis (PCA) is proposed. Unlike the traditional PCA algorithm, PCA selective ensemble increase the difference degree between the main component and the others. Moreover it expands the selective ensemble in the application of unsupervised algorithm. The validity of the algorithm is verified through the analysis of the actual data.
Research for SOA Frame Based on WebSphere Platform
Authors: Lin Yue Jin , Liu Bing Yue , Chen Hui Ling
Published: October 2011

To meet the requirements of enterprises in different developing phases, often using the latest technology under the circumstances that lead to existing many and various hardware, operating systems, middleware, programming languages, data storage, reusable redundant code in the enterprise. Service-Oriented Architecture (SOA)[1] is naturally chose as an application architecture by many enterprises because of its innate loose coupling and co-operating. In this paper you will see the Web service development tools supplied by WebSphere platform and you will also see that Web service function which is supplied by J2EE can easily build up SOA system [2] and visit the the existing business process.
Research on Fuzzy Evaluation of Ink-Jet Paper Printability
Authors: Chen Hai Sheng , Qu Zhen Cai , Tang Bao Lin
Published: October 2011

Based on the experiment, this paper used principal component analysis and multiple regression analysis to establish a fuzzy evaluation system between the paper performance and print qualities. Five kinds of ink-jet paper with different surface characteristics were chosen in this paper to test their properties including absorbability, gloss, roughness, whiteness etc. During the same printing condition, using the digital proofer of EPSON Stylus Pro7880c, the standard wedge of GATF, solid color lumps and standard lines were printed on these paper samples; dot gain and solid densities were tested by SpectroEye, then contrast-K was calculated, the qualities of lines were analyzed with QEA image Analysis. Finally, paper surface characteristics were analyzed with principal components analysis, and definition of printing was analyzed by QEA Image Analysis, correlation between paper basic performance and the characteristics of printing qualities, such as dot gain, solid density, definition and contrast-K, and an integral evaluation function and a model were established. When evaluating on paper, as long as its surface characteristics were tested, the printability of different paper can be evaluated in a fuzzy and integral way through the calculation of the model and evaluation function. This work offers a certain theoretical reference and practical guidance to the selection of ink-jet paper and the improvement of ink-jet qualities.
The Research on Fastener Image Skew Detection
Authors: Xu Hai Rong , Lu Wen Hua
Published: October 2011

When image digitalization device translate fastener into fastener image, the fastener image is always skewed to some extent, which will result in failure of the subsequent processing. The correction of the fastener image is the important step in its automatic recognition. In order to overcome the heavy computing burdens of hough transform, a new usage of hough transform is introduced in this paper. The algorithm works by first doing certain process on input image, the close edge of the image is gotten. Then a two-stage Hough transform algorithm is applied to the image to calculate the angle of the main edge line. This angle is thought as the declining angle of the fastener image. Lastly, the orientated image is rectified using rotation method. This algorithm is validated through experimental results.
Photovoltaic Cell Test System Based on Dual-Core Processors
Authors: Zhang Ping Chuan , Kong Yun Long , Zhang Hang Sen
Published: October 2011

This paper design an intelligent photovoltaic cell test system. The high performance dual-core 16bits SPCE061A microprocessors are used as control and data processing center. The powerful data operation ability of SPCE061A makes it to carry out software filter for measured data and enhances testing precision. the experiments demonstrated the test system can measure the characteristic parameters of photovoltaic cells: open voltage, current, the fill factor and photoelectric conversion efficiency, draw photovoltaic cells I-V curve, find the best working points , and also have the characteristics of miniaturization and intelligent.
Constructing an Architectural Designer-Oriented Computer-Aided Design Tool for Smart Home Device
Authors: Chang Yi Feng , Chen Shang Yuan
Published: October 2011

This study developed a designer-oriented smart home device computer-aided design tool that can help architectural designers to design smart home. This design tool is intended to incorporate smart home devices into overall spatial planning from the beginning of the planning process. Cloud computing [1] facilitates opportunities for online collaboration and coordination between individuals, between individuals and objects, and between objects, and will help speed the evolution smart home from centrally-controlled intelligent buildings to "smart living space" emphasizing distributed computation ability. This study employs (1) the theory of intelligent agents and (2) scenario-oriented design as an integrated framework for computer-aided design of smart home device. Smart home device are redefined based on agent theory. Agents' behavioral models include the five types of passive, reactive, active, interactive, and communicative; a comparison of these types provides a basis for the selection of home elements. Scenario-oriented design is employed to construct a smart living space (the AI. Living Lab.), which verifies the feasibility of the interface's operations. Finally, the resulting design methods and practical results are used to create a system development blueprint. Real life scenarios provide a basis for communication with smart home industry collaborators, enabling architectural designers to perform scenario modeling of a smart home proposal, quickly and conveniently establish a smart home information modeling system, and promote teamwork with smart home industry personnel.
Study on SBO in the Real-Time Data Acquisition of Iron and Steel Enterprise
Authors: Yu Shao Pu , Zhang Kai Bi , Luo Rong
Published: October 2011

On the basis of research on the steel enterprise information system in the current domestic small and medium-scale iron and discovery of the adequate for the existing system, a idea of the combination the real-time database technology with advanced management services is put forward. By SBO platform we construct the general production framework based real-time database and design its main functional modules; at the same time, we summarize the overview of the interface method with real-time database, finally we realize the program .The program helps raise the level of corporate information production and productivity, reduce production costs significantly and improve their market competitiveness.
The Development of Lungmen ABWR TRACE Safety Analysis Model
Authors: Lin Hao Tzu , Wang Jong Rong , Shih Chun Kuan
Published: October 2011

One of the main R & D work in nuclear engineering is the development of computer programs related to nuclear power plant (NPP) safety analysis. The advanced thermal hydraulic code named TRACE for NPP safety analysis is developing by U.S. NRC now. Lungmen NPP is the first ABWR NPP in Taiwan and still under construction. The safety analysis of NPP is very important work. In general, the description and results of the safety analysis for the transients are in the Final Safety Analysis Report (FSAR) of NPP. In this research, the development of the Lungmen NPP TRACE model for the safety analysis is performed. The transient analysis prediction of the TRACE model for Lungmen NPP is also performed. The loss of feedwater flow (LOFW) transient data and MSIV (Main Steamline Isolation Valve) closure direct scram transient data from FSAR are used to compare with the predicted results of the Lungmen NPP TRACE model. The compared results indicate that there are the similar trends of parameters between the TRACE model of Lungmen NPP and FSAR for the analysis of the LOFW transient and MSIV closure direct scram (MSIVCD) transient.
Simulation on Temperature Field of Gap Oil Film in Constant Flow Hydrostatic Center Frame
Authors: Li Yong Hai , Meng Xiu Li , Yu Xiao Dong , Wu Bo , Gao Chun Li , Qiu Zhi Xin , Zhang Yan Qin , Jiang Hui , Shi Zhi Min
Published: October 2011

In order to solve the thermal deformation of the hydrostatic center frame in the heavy type horizontal lathe, a simulation research concerning temperature field of hydrostatic center frame is described. The Finite Volume Method of CFX has been used to compute three-dimensional temperature field of gap fluid between workpiece and bearing pillow. This research theoretically analyzes the influence of angular velocity on the bearing temperature performance according to lubricating theory and computational fluid dynamics, and it has revealed its temperature distribution law of gap oil film. Results indicate that an improved characteristic will be affected by angular velocity easily, and oil cavity temperature increases by gradually with angular velocity enhancing. Through this method, the safety of a hydrostatic center frame can be forecasted, and the optimal design of such products can be achieved, so it can provide reasonable data for design, lubrication, experience and thermal deformation computation for hydrostatic center frame in the heavy type horizontal lathe.
The Research on Modeling of Stereo Vision Measurement and System Accuracy in Non-Ideal Situation
Authors: Yu Zhi Jing , Lu Sheng Fang
Published: October 2011

This paper presents the modeling of stereo vision measurement for solving the optimal spatial point under non-ideal circumstances, and then analyzes the error of stereo vision measurement system from the imaging feature location and camera internal parameters and external parameters, such as the focal length, the baseline distance, which plays a important role in optimization of system architecture and layout of measurement system.
A Design Principle of Toothbrush Handle Based on Ergonomic Theory
Authors: Zhu Yun Feng
Published: October 2011

Toothbrush is a simple but an indispensible product. The reasonable or not of its design directly influences human’s oral health. Its handle is the main body of a toothbrush and plays a critical role in the success of its design. This paper makes a research on toothbrushes and studies on the general design principle of toothbrush handle with a combination of ergonomic theory.
Anomaly Detection in Hyperspectral Imagery Based on Spectral Gradient and LLE
Authors: Wang Liang Liang , Li Zhi Yong , Sun Ji Xiang
Published: October 2011

The local linear embedding algorithm(LLE) is applied into the anomaly detection algorithm on the basis of the feature analysis of the hyperspectral data. Then, to deal with the problem of declining capacity of identifying the neighborhood caused by the Euclidean distance, an improved LLE algorithm is developed. The improved LLE algorithm selects neighborhood pixels according to the spectral gradient, thus making the anomaly detection more robust to the changes of light and terrain. Experimental results prove the feasibility of using LLE algorithm to solve the anomaly detection problem, and the effectiveness of the algorithm in improving the detection performance.
Construction and Practice for Practical Teaching Base on Campus for Petroleum Engineering
Authors: Li Wen Hua , Wang Xi An , Wang Zhen Ku , Liu Jing Cheng
Published: October 2011

The necessity on construction for practical teaching base on campus for petroleum engineering is described from such three aspects as requirement of practical talents training, requirement of vocational skills training as well as requirement of subject construction and campus culture construction in this article, the construction mode of practical teaching base on campus for petroleum engineering is discussed and the advantage of establishing the practical teaching base on campus cooperated jointly by campus and enterprise is analyze. Finally, the efficiency produced by the practical teaching on campus is summarized with combination of the operation condition of practical teaching base on campus for petroleum engineering.
Control Simulation in Building Energy Management Systems by Linear Matrix Inequality
Authors: Yang Yau Bin , Wu Min Der , Chang Yu Choung
Published: October 2011

The energy usage of building has occupied the large portion of total energy consumption. It is important to develop the building energy consumption minimization method. The new study adopted the thermal conservation equation for this multivariable control issue and the linear matrix inequality based on linear quadratic regulator for mixed H2&H∞ control. After substituting the obtained control gains into the original thermal systems, the asymptotically stabilities of whole systems are guaranteed. The comparison between the traditional and current control scheme are made.
Correlation between Zirconium Addition and Compressive Properties of AZ31 Mg Alloy Foams
Authors: Hur Bo Young , Zhao Rui
Published: October 2011

The compressive behaviors of AZ31-Zr foams using Ca particles as thickening agent and CaCO3 powder as foaming agent were investigated in this study. The porosity was about 48.7%~72.9%, pore size was between 0.43~0.97 mm, and homogenous pore structures were obtained. Mechanical properties of AZ31 Mg alloy foams were investigated by means of UTM. The cellular AZ31 Mg foams possess superior comprehensive mechanical properties. The energy absorption characteristics and the effects of compression behavior on the energy absorption properties for the cellular AZ31 Mg foams have been investigated and discussed. The results show that with the addition of Zr, the Mg alloy foam has the highest energy absorption value of 16.26 MJ/m3 and the hardness value of 81.8 HV, which is much higher than that of the foams fabricated without Zr.
Design of on-Line Detection System for Vehicle Rear Axle Based on Vibration Theory
Authors: Zhou Ya Fu , Lian Jing , Sun Xin Han , Li Lin Hui
Published: October 2011

It is important to detect the vehicle rear axle on-line during production process. To realize the quality detection of the rear axle, vibration diagnosis method is adopted to analyze the vibration characteristics of the rear axle and calculate characteristic frequency. The on-line detection control system of vehicle rear axle quality is designed by extracting characteristic parameters of correctly reflecting rear axle running state and applying PLC system. The system has been operated stably, reliably and efficiently through the test. It has a practical significance.
High-Resolution Correction of Arbitrary Wavefront Aberration Using Liquid Crystal Spatial Light Modulator
Authors: Zhang Hong Xin , Xu Xiao Xi
Published: October 2011

Wavefront correction plays significant role in some fields like astronomical observation, laser processing and medical imaging, etc. Liquid crystal spatial light modulator ( LC SLM) is an ideal device for high-resolution wavefront correction because of its low cost, low consumption, large number of pixels and independent programming control of each unit. It is researched experimentally that LC SLM is used as a wavefront correction device and corrects arbitrary wavefront aberration. Wavefront correction is performed based on phase conjugation and periodic phase modulation with modulo-2π. The experimental results show that the PV value of the irregular wavefront aberration is 1.56λ, RMS value is 0.25 and Strehl ratio is 0.08 before correction, but the PV value of the residual aberration is reduced to 0.26λ, RMS value is 0.02 and Strehl ratio is increased to 0.97 which is approximated diffraction limit after correction. It is proved to be feasible and effective that LC SLM is used to the high-precision and high-resolution wavefront correction.
MCMC Sampling Statistical Method to Solve the Optimization
Authors: Rong Teng Zhong , Xiao Zhi
Published: October 2011

This paper designs a class of generalized density function and from which proposed a solution method for the multivariable nonlinear optimization problem based on MCMC statistical sampling. Theoretical analysis proved that the maximum statistic converge to the maximum point of probability density which establishing links between the optimization and MCMC sampling. This statistical computation algorithm demonstrates convergence property of maximum statistics in large samples and it is global search design to avoid on local optimal solution restrictions. The MCMC optimization algorithm has less iterate variables reserved so that the computing speed is relatively high. Finally, the MCMC sampling optimization algorithm is applied to solve TSP problem and compared with genetic algorithms.
Research and Application of Assembly-Centered Lifecycle Quality Management System
Authors: Yin Hui , Luo Yu Liang , Deng Yu Hao , Zhu Hai Ping
Published: October 2011

Aiming at the quality management issues in manufacturing enterprise, this paper establishes the product lifecycle quality management (PLQM) system based on the architecture of SOA and the knowledge of computer integrated manufacturing. This assembly-centered PLQM system collects and analyzes the quality data by integrating different information systems. The system-crossing quality management process, and the mechanism of problem prevention are also included in this system to realize the quality problem tracing and run-to-zero quickly. Therefore, this PLQM system provides the decision making supports for the quality plan, quality inspection and quality analysis in the product's whole quality management process. These measures help guarantee the quality of the final product effectively.
Study on Weld Shaping and Mechanical Properties for Three Movement Types of Arc Welding Robot Torch
Authors: Jia Jian Ping , Chen Jian Ping , Liu Yun Long , Zhang Ya Qin
Published: October 2011

Compared with the existing arc sensors, high speed rotating scanning arc sensor has up to 50 HZ rotating speed, and it can be much more compact, cheaper and more sensitive. The arc welding robot can weld for three movement types using the high speed rotating scanning arc sensor. Weld shaping and mechanical properties for three movement styles of arc welding robot torch are studied. The macrostructure appearance characteristics of mild steel bead-on-plate weld seam section and fillet weld seam section are analyzed. Experimental researches are undertaken in tension and bending test.The results show that the weld shaping of rotating arc weld for bead-on-plate weld and fillet weld is better than that of linear motion arc welding and oscillating arc welding. This investigation will provide the theoretical basis for the advantage and choice of three arc movement styles in the practical production.
Study of CODOG Propulsion System Mission Reliability
Authors: Shi Heng , Dou Jin Sheng , Yu Shi Lin
Published: October 2011

The component and mission of CODOG propulsion system were analyzed in this paper. According to the mission variation, different operation conditions were introduced and mission reliability models of each condition were established by the use of reliability theory. After reliability data of main component of CODOG propulsion system been obtained, mission reliability of each condition was calculated and its phased mission was simulated through MATLAB software. Relative curve between system reliability and working time was found. The results show that, mission reliability of cruise condition is the biggest while phased mission reliability is the smallest. System availability is bigger than reliability after taking maintainability into account. System reliability can increase to a great extent and its useful life is longer by improving maintainability of its component.
Research on Non-Man-Made-Control Bus Anti-Overload System
Authors: Meng Li Xin , Zhang Xi , Li Jun Fei
Published: October 2011

Overloads in coach buses creates more possibilities to cause serious traffic accidents and bring heavy loss and injuries to our country and people. This research bases on sensor control technology and SCM (Single Chip Micyoco) technology in order to prevent people from changing its overload control system. We aim at developing an overload safety monitoring and warning control system which can count the number of passengers, send out overloading alarm signals and control the work of the engine. This system has functions that can set up upper limit of the number of passengers and show the current number. When the bus is overloading, the system will send out audible and visual alarm signals and stop the engine from starting through the engine monitoring system. When the overload is relieved and up to the upper limit, the system will automatically clear the alarm and the engine will return to its normal operation.
Parameters Design Platform of Adjustable Gear's Backlash
Authors: Shen Shao Hua , Shi Xiang Dong
Published: October 2011

Aiming at the merit and shortcoming of gear's backlash, the paper analyzes several typical gear drivec adjust action regulation. Seeks for the primary factor of influence gear backlash, establish the relationship between the adjustment parameter and the gear's backlash from the gear drive's meshing characteristic, then establishes the parameters design platform of gear's backlash based on VB, proposed the reasonable effective adjust ways,compute change value of gear's backlash,to satisfies the gear drive contact condition's request.
The Study of Image Reconstruction Based on Compressed Sensing Theory
Authors: Fang Min , Liu Yi Min , Liu Wan , Chen Hui
Published: October 2011

Compressed Sensing (Compressed Sensing, referred to as CS) is a new theory of data acquisition technology. On sparse or compressible signals, it can capture and represent the compressible signal at a rate significantly below Nyquist rate and adopt non-adaptive linear projection to keep the information and structure of original signal, and then reconstructs the original signal accurately by solving the optimizational problem. Compressed sensing breaks the bottleneck of the Shannon Theorem because it cuts down the costs of saving and transmission in data transfer. This paper briefly describes theoretical framework and the key technology of the CS theory, focuses on introducing the application in reconstructing image information of CS theory and then makes a simulation using matlab. As expected, the simulation results show that CS can reconstruct the original signal accurately under certain conditions.
The Fatigue and Degradation Mechanisms of Wire Ropes Bending-over-Sheaves
Authors: Hu Zhi Hui , Hu Ji Quan
Published: October 2011

Fatigue failure behaviors caused by wire ropes bending-over-sheaves are discussed in the paper. Stress conditions of wire ropes bending-over-sheaves and the mechanism of damage to wire rope caused by fleet angel and angle of wrap is analyzed, the fatigue failure mechanism of wire ropes is investigated in the paper. The investigation indicates that the load and the mechanical damage of ropes bending-over-sheaves is very complex, and the fatigue failure of ropes bending-over-sheaves is the result of combined action of bending fatigue and various kinds of damage. The research will have implications to design and use of wire rope.
New Bulk Conveying Equipment and its Experimental Research
Authors: Li Yu , Li Yong Zhi , Chen Ding Fang
Published: October 2011

Among all the bulk conveying processes, how to effectively and conveniently put the bulk into the conveying process is regarded as one of the most important problems. This article brings out a brand-new equipment—Screw-gas Bulk Sucking and Taking Equipment for the solution, which applies both the theory of vertical screw conveyor and the theory of pneumatic handling. It constitutes of 3 parts; respectively from bottom to above they are: Centrifugal force Separating Part, Screw Lifting Part and Pneumatic Conveying Part. Particle material is drawn into the equipment in the form of gas-solid two-phase flow by the Atmospheric pressure, and then helically rises in the Centrifugal Force Separating Part which is an inverted cone. The material would be separated from the two-phase flow by the effect of centrifugal force and then be lifted in the Screw Lifting Part. The gas flow with the very little remained material would be drawn into the blower. By thus Screw-gas Bulk Sucking and Taking Equipment could take the material and put it to the next conveying process conveniently and efficiently with the superiorities of low clearing-up, little dust removal, simple construction and convenient maintenance. The article provides the feasibility of the new equipment by experiments on 3 kinds of identical particle.
Design and Implementation of Auto Parts Data Management System Based on BOM
Authors: Zhang You Bing , Yang Ya Hui , Jiang Mu Lin , Xia Peng Tao , Li Bo
Published: October 2011

According to the current actual situation of informatization in Commercial Vehicle Company of DF Motor Co., Ltd. , there exists such a problem as the incomplete parts data of S-BOM, which fails to provide complete parts data of the department of procurement and sales. In order to solve the problem, this paper designs and develops the parts of DF Motor Co., Ltd. Data Management System. The system uses Delphi 7.0 as the development tools and Oracle 9i as the back-end database，which implements the function of centralized management, maintenance and query of S-BOM parts data by means of parts state management, structured data management, parts data query and other function modules. The system meets Commercial Vehicle Company's requirements of centralized procurement by addressing some of the key issues in the original parts management. Fund Project: Key Projects of Science and Technology Research of Hubei Department of Education (No. D200723003 ); Projects of National Natural Science Foundation, 2010(No. 51006132)