bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on Intelligent Control of the Dust in Coal Mining
Authors: Zhang Zhao Ran , Liu Guo Qing , Bai Xiao Sheng , Yang Guo Liang
Published: February 2012

The harm of coal dust under mining coal is really serious, so how to effectively control it has always been a tough problem. This paper analyzes the cause of creating dust over the coal face, and introduces the application of dust intelligent control in detail based on the reality situation of coal mining. Though the application of intelligent dustproof system, the concentration of the coal dust has been reduced by 333.9mg/m3 to 21.7mg/m3, the result is creating a good working environment for workers, this system has the higher valuable application.
Application Study on Hot Wire Type Air Flow Meter Used in Portable Exhaust Analyzer
Authors: Lu Ye Qiang , Xu Zhang Hong
Published: February 2012

The hot wire type air flow meter is an important tool in measuring the quality of air flow. It is widely used in Santana engine, and in this article, the application in exhaust analyzer is introduced. The basis theory, the basic principle and the application of the hot wire type air flow meter are presented. The main purpose of this article is using the least square method to fit the standard data, calibrating accurately the flow meter by making the curve fit, then using standard tests and comparing the results with the standard current flux at last. The results indicate that the hot wire type air flow meter is accurate in surveying the flux of the exhaust gas.
Intumescent Flame Retardant Epoxy Resins Based on Condensation Polymers of P-Phenylenediamine and Bispirocyclic Pentaerythritol Diphosphate
Authors: Huang Ya Wen , Ma Jia Jun , Yang Jun Xiao
Published: February 2012

Copolymer of p-phenylenediamine and bispirocyclic pentaerythritol diphosphate was synthesized and characterized by FTIR and 1H NMR. This polymer was used to prepare epoxy resin/SPDA composites. Thermal stability of SPDA and epoxy/SPDA composites were investigated by thermogravimetric analysis (TGA), and their flammability were investigated by the LOI test. TGA results showed that the addition of SPDA improved the char residue of epoxy resin. SEM investigation showed that the residual chars have a honeycomb-like structure, indicating an intumescent ﬂame retarding effect of SPDA in composites. In addition, all of above results confirmed that accelerate carbonization play a key role in improving flame retardancy of epoxy resin.
Fuzzy Control of a Class of Discrete-Time Fuzzy Bilinear Systems with Time-Delay
Authors: Jiang Jian Hu , Wu Chao , Ge Yun Wang , Song Li Jun
Published: February 2012

The stability control problem is considered for a class of discrete-time T-S fuzzy bilinear system with time-varying delay in both state and input. Based on the parallel distribute compensation (PDC) scheme, some sufficient conditions are derived to guarantee the global asymptotically stability of the overall fuzzy system, which are represented in terms of matrix inequality. The corresponding controller can be obtained by solving a set of linear matrix inequalities. Finally, a simulation example shows that the approach is effective.
Synchronous Decoupled Motion Control for Power-Wheelchairs
Authors: Yang Fu Yun , Tsai Mi Ching
Published: February 2012

Unanticipated disturbances in outdoor environments are the main impediments to the development of motion control for transmission vehicles. Classical synchronous approaches which neglect the mechanical coupling effect are unsuitable for such types of mechanisms. To address this concern, much effort has been made to overcome such difficulties. A synchronous decoupled control framework was proposed based on the multivariable model, in which a decoupling transformation matrix was adopted for improving the corresponding performance. The concept of the proposed control framework is intuitive and quite straightforward. To demonstrate the capacity of the mathematical model as well as the effectiveness of the control scheme, a power-wheelchair was utilized as an illustrated example, where the synchronous performance can be enhanced by almost 50% as compared to the classic approach.
Calculation and Analysis of Gears in MW Wind Turbine Gearbox
Authors: Zhu Ren Sheng , Liu Yong Mei , Zheng Zhen Zhen , Shen Jian , Lu Yong Pin , Fang Zhen , Zhang Zu Liang , Huang Qiang
Published: February 2012

Gearbox was a key component of wind turbine but with the highest failure rate, so it was necessary to analyze its safety and reliability. In this paper, gears in MW wind turbine gearbox were analyzed by nonlinear finite element contact analysis method. The changing regularity of the stress was found as tooth mesh, and it was proved to be reliable by comparing with the result of theoretical calculations. The maximum contact stress existed on the second engaged tooth as well as the vicinity of the pitch circle of gears. The stress concentration phenomena occurred at the tooth root fillet which caused the main failure form of gears.
A Crowding Niche Cellular Genetic Algorithm
Authors: Zhang Yi , Liu Zheng , Zhang Hu , Li Hui Fang
Published: February 2012

This paper presents a crowding niche cellular genetic algorithm (referred to NCGA) aiming at solving the problems of local convergence and non-uniform population distribution in traditional genetic algorithm. The selecting operation in traditional genetic algorithm is improved by bringing in the concept of neighbors of cellular genetic algorithm, and the population distribution is greatly enhanced by introducing crowding niche mechanism, which betters the ability of global searching and helps to avoid the population local convergence. Meanwhile, the paper describes the crowding niche cellular genetic algorithm in details and compares it with simple genetic algorithm （SGA） and simple niche genetic algorithm （NGA）; the comparison results reveal that, NCGA outperforms the other two algorithms in terms of convergence rate and population diversity.
Approach to Detect and Control Gap-Width with Peak Current in Pulse ECM
Authors: Natsu Wataru , Terada Atsushi
Published: February 2012

In this study, in order to keep the feed rate of the tool electrode the same as the dissolution rate of the workpiece material in the pulse ECM, a method was proposed to detect and control the gap-width according to the relationship between the current waveform and the gap-width. First, the relationship between the current waveform and the gap-width was investigated experimentally. It was found that there is a correlation in the transient overshoot of the current waveform and the gap-width. Based on this correlation, a system used to detect and control the gap width during machining was developed. This system is composed of the circuit that detects the change in the current waveform and the algorithm that processes the detected signals from the circuit. The effectiveness of the gap-width detecting and controlling method was verified by experimental results.
A New Design Method of Body-in-White Lightweight Considering NVH Performance
Authors: Gao Zhi Lin , Kong Qing Hua , Lin Jian Pin , Hu Qiao Sheng , Chen Yan
Published: February 2012

With the development of the auotomobile industry, the body-in-white has to meet the dual requirements of lightweight and NVH performance. This study put forward a new lightweight design method considering NVH performance. An example of lightweighting a non-load-bearing body-in-white was given to illustrate the design flow of this method and certificate the effectiveness and applicability. In order to accurately find out the neutral contribution panels which almost have no influence on the interior acoustic field, a new parameter, the weighted acoustic contribution, was introduced to analyze and evaluate the panel synthetical acoustic contribution to multiple peak frequency at multiple field points. Consequently the whole body-in-white’s weight was reduced by 14.673kg and the interior acoustic field remained basically unchanged.
Reserch of Dislocation Theory in Micro Cutting
Authors: Ding Hong Jun , Wang Xi Bin , Liang Zhi Qiang , Jia Qiang
Published: February 2012

This paper analysis Griffith 's Theory and the metal theoretical fracture strength, thus introducing a line defect that existence in actual crystal — dislocation; And in-depth analysis the metal fracture dislocation mechanism in the micro cutting, and the formation and expand of the Fracture cracks , provides the theory basis for micro cutting
An Approach to Region-Based Feature Recognition for Structural Parts
Authors: Qiao Li Hong , Wu Jian Feng
Published: February 2012

Feature-based numerical control programming can enhance the process planning efficiency for complex structural parts in aeronautic industry. Feature recognition is often being a useful tool to the domain. In order to handle the variety and uncertainty of the feature interpretation of feature recognition of structural parts, a region-based feature recognition approach is proposed. On the basis of the characteristics of the structural parts, the approach employs the fact that topology surfaces of structural parts have directions, and utilizes region as the foundation of feature recognition. By recognition and combination of regions, the approach acquires the features of a structural part. The approach is efficient in recognizing the features of structural parts which have apparent directional characteristic.
Research on the Devices of Waste Heat Recovery in Tea Dryer
Authors: Tao Zhong Nan , Yang Lian Fa , Wu Ze Qiu
Published: February 2012

The waste heat is a great part of energy loss in tea processing. The status of waste heat recovery in tea drying has been reviewed. The characteristics and the application of the devices used to recover the waste heat in tea drying have been introduced, such as the circulating type, the storage type and the exchange type. The drawback of the waste heat recovery devices which exists in tea drying process has been analyzed. And the new device of waste heat recovery in tea dryer has been mentioned.
Model of Product Warranty Network and its Robustness
Authors: Yu Jian , Zhang Zhen
Published: February 2012

Robustness is an important index to assess the performance of product warranty network, and it’s helpful for managing the relationship between the manufacturers and the suppliers to analyze it. The paper establishes product warranty network’s evolutionary model according to its characteristics, and chooses the average shortest path as the measures of robustness to analyze the robustness of model of product warranty network under the random attack and the selective attack. The conclusions show that the product warranty network have strong tolerance against random failures yet are fragile under selective attacks.
The Development and Application of Geographical Information System in Rural Distribution Network
Authors: Ye Feng , Li Na
Published: February 2012

Because rural distribution network has complex structure and various operation management things, geographic information system is the effective means to display the operation conditions and to improve the management efficiency of rural distribution network. In this paper, we studied and developed the PowerWEBGIS system based on WEB and specially used the technology of combining with the real-time monitoring system, which is more suitable for the rural distribution network management. The effectiveness of this system has been confirmed through its application in the several power supply companies.
The Calculation of TTR in PROFIBUS System
Authors: Zhen Li Ping , Si Shao Wei , Xie Huan Qing
Published: February 2012

In PROFIBUS system, we analyzed the time behavior of data exchange and token-passing, and give the TTR selection method, when each master station holding enough token time. And then we discussed the random characteristics of networks and FDL, give the formula of random behavior to calculate time, and get the TTR and the revised value of TTR in PROFIBUS system which has FDL and MS1 communication. Finally, further discussed the case of transmission errors, analyzed the impact of transmission errors to TTR and the real-time of system, and give the TTR and the revised value in this situation.
A Milling Method of an Enveloping Toroidal Worm on a CNC Turning Center
Authors: Dong Li Yang , Liu Ping Yi , Wei Wen Jun , Li Hai Tao , Dong Xue Zhu
Published: February 2012

To solve the problem of allowance equalization in the grinding process of an enveloping toroidal worm after turning by using the hindley worm turning method, a milling method was presented based on discretization of the spiral surfaces rather than the generating principle. The method is used on a CNC tuning center with a cylindrical end milling cutter rather than on a specialized machine tool. The material of the spiral grooves of the worm was removed layer by layer both in the tangential and the radial directions of the torus of the worm from the tooth top circle to the tooth root circle. The milling model was built, and the coordinates of the discrete points on the spiral surfaces were calculated according to the theoretical equations of the spiral surface of the worm. A series of feed positions X and Z of the milling cutter and the corresponding rotating angles C of the worm were determined for programming. The grinding allowance of a planar enveloping toroidal worm on axial sections was calculated and the trial manufacturing was performed. The allowance in the subsequent grinding process could be equalized and the manufacturing efficiency could be increased greatly.
The Development of an APT Program Interpreter for 5-Axis Machining
Authors: Cheng Hsin Yu , Tsai Jo Peng , Kao Yung Chou
Published: February 2012

As there are various machine configuration and frequent changes of cutter orientation in 5-axis machining, the standard NC codes are not inter-exchangeable among machines. This phenomenon induces a lot of cutting difficulties and machining problems such as the inconvenient working process for operators and very low cutting efficiency. At present, some advanced machine controllers already can accept the APT code besides NC code to increase the cutting flexibility. They also offer some advanced machining functions such as tool center point control and spatial compensations of tool, etc. By way of APT interpreting, the common controller can also implement these advanced functions. Besides, CAD/CAM software also supports APT post-processor to generate NC code for different machine configurations. This means the application of ATP program has played an important role in five-axis machining. However, although CAD/CAM software supports the interpretation of APT program as a core key technology of five-axis machining, the manufacturers of controller with advanced functions are unwilling to open their system. Up to now, there has been few related research papers published on this topic. In this paper, we proposed an APT interpretation method for five-axis machining. This method includes seven functional modules and related implementing procedures. A case study has been adopted to demonstrate the feasibility of the proposed method. The research result could be adopted as a reference to develop the value-added technology in 5-axis machine tool application for academy and industry.
CFD Study of 2D Model of Diffuser for Harnessing Tidal Energy
Authors: Mehmood Nasir , Liang Zhang , Khan Jawad
Published: February 2012

Diffuser augmented tidal turbines are getting enormous attention due to their immense potential to increase the generated power output. Researchers around the globe are investing considerable time and financial resources in this domain. Limited research results are available for diffuser augmented tidal turbines due to their emerging nature, large and costly research and development setup, startup cost and proprietary issues. Turbine enclosed in a diffuser is based on the principle that the generated power output by a tidal turbine is directly proportional to the cube of velocity of incoming fluid flow. Thus, even a minor increase in velocity considerably increases the generated power output. The diffuser helps accelerate the incoming fluid flow. Hence, the efficiency of the turbine is significantly increased by using a diffuser. It is challenging to accelerate the incoming flow by using a diffuser due to its shape, geometry and fabrication limitations. The diffuser design requires great deal of innovation and time investment. The purpose of this paper is to present the study of 2D model of diffuser for tidal current turbine. The study involves developing a 2D CFD model of diffuser, acquiring simulation results and comparison with experimental results. The mesh is generated in ICEM followed by simulation in CFX. The simulation results are compared to experimental results and found in reasonable agreement. The research is essential to utilize CFD tools for diffuser design used for tidal current turbine.
Upgrading of the Bench Drilling Machine’s Manual Feeding to Automatic Feeding System
Authors: Lan Pi Xiang , Hu Guo Qing , Deng Xiao Fan , Hou Feng Yuan
Published: February 2012

Bench drilling machine is compact and flexible. But in the mass production, as the feeding of the machine is rely on manual work, the workers are easily to be exhausted and the manual production is not effective. This thesis gives a brief introduction of process of designing the automatic feeding device which is based on PLC for the Z512-drilling machine. The thesis demonstrates the device’s construction and control logic. This device can save works’ labor, time, easily to be produced and has a valuable application.
Measurement of COD for Sugar Refinery Wastewater Using FTIR/ATR Spectroscopy with Stability
Authors: Pan Tao , Li Peng Zhao , Xie Jun
Published: February 2012

Fourier transform infrared spectroscopy (FTIR) and attenuated total reflection (ATR) technology combined with the partial least squares (PLS) regression were successfully applied for the rapid no-reagent determination of chemical oxygen demand (COD) for sugar refinery wastewater. Among 105 samples, 45 samples were randomly selected as the validation set. The remaining 60 samples were divided into the calibration set (40 samples) and the prediction set (20 samples) for a total of 30 times with certain similarities. The appropriate model with stability was established on the waveband of 4500 cm-1to 600 cm-1. The optimal PLS factor was 4, the modeling effect M-SEPAve, M-RP,Ave, M-SEPStd, and M-RP,Stdwere 38.1 mg/L, 0.944, 3.2 mg/L, and 0.013, respectively, the validation effect V-SEP and V-RPwere 38.2 mg/L and 0.949, respectively, which has good prediction effect and stability. The results provide a reliable analytical model for the monitoring of COD in sugar refinery wastewater.
Experimental Research on SLS for Bionic Small Wing
Authors: Cen Hai Tang , Liu Jian Lan , Wang Xiao Liang
Published: February 2012

Through manufacturing the model and using the static experiments, examining the effectiveness of the bionic structure design and the reliability of infinite element analysis has become an important procedure on the bionic structure research. With its fast, flexible benefits, RP becomes an effective tool for the evaluation of product model design, rapid manufacture and the performance tests. According to the characteristic of the plant vein staggering and tilt, small airfoil obtained through the optimal combination of the characteristic belongs to the typical thin shell parts. Internal beam interconnects with the rib, the pore with different size and shape distributes on the wing rib, which needs a good surface quality and a certain accuracy and strength, thus it is difficult to make. SLS is suitable for the complex thin-walled parts without support, low processing costs, Through the rational selection of layered and forming parameters, it obtains the SLS small wing archetypes and bionic-type sample, which has a good apparent quality after disposal and is suitable for model statics test etc.
Dynamic Characteristics of Gear Transmission System for Wind Turbine Gearbox
Authors: Yu Yin Xin , Yuan Hui Qun , Huang Zhi Min
Published: February 2012

A study is made on gear transmission system of 1.5MW Wind Turbine Gearbox. Using lumped parameter method, the dynamics model involving 6 degrees of freedom for every helical gear is established with taking the time-varying mesh stiffness and error into account. The dynamics characteristic of transmission under the effect of both external and internal excitation is calculated. The results show that under the rated speed, the transmission system is quasi-periodic, and the vibration directions of gears with large amplitude are obtained, which is consistent with testing results. This study can be referred to in engineering applications.
Design and Finite Element Analysis of Hydraulic Pump Vehicles Based on Feature Modeling
Authors: Na Ming Chen , Wu Da Wei , Han Xiao Guang
Published: February 2012

Aimed at the problems of mechanical failure in the process of using hydraulic pumps vehicle, three-dimensional software was used to complete the structure designing of gear parts, applied the virtual assembly technology to realize the virtual assemble of gear speed reducer, so as to detect the interference problems in the process of assembling. Finite element analysis software was used to analysis the main components of gear speed reducer, in order to verify the rationality of components structure designing, to a certain extent to provide theoretical reference for the gear speed reducer designing
Reliability Analysis Based on Improved Bayes Method of AMSAA Model
Authors: Qiang Yang , Zhang Lei , Sun Zhi Li , Liu Yi , Bai Xue Bin
Published: February 2012

Aiming at the defects that failure samples of five-axis NC machine tools is small, traditional reliability analysis is not accurate, this paper presents reliability analysis mode based on improved Bayesian method for AMSAA model. Firstly, we obtain the failure model of NC machine tools meets the AMSAA model according to goodness-of-fit test, and in order to meet the requirements of simplifying engineering calculations, this paper adpots a method of Coefficient equivalent which converts failure Data into index-life data; then using Bayesian methods to estimate reliability parameters for the Index-life data; for the last we proceed point estimation and interval estimation for the MTBF of the machine. Take High-speed five-axis NC machine tools t of VMC650m for example, the result proved that the method can take advantage of a small sample of the equipment to proceed point estimation and interval estimation for MTBF failure data, and provide a reference for the optimization of maintenance strategies and Diagnostic work of the NC machine tools.
Nanocrystallization of Fe-Based Amorphous Alloys Fe73.5Cu1Nb3Si13.5B9 by Yb-Doped Fiber Laser Overlapping Irradiation
Authors: Ma Qian Li , Bao Yong , Zhang Guo Rui , Yu Li Meng , Ji Ling Fei , Jiang Yi Jian
Published: February 2012

The paper presents a laser irradiation method for rapidly fabricating Fe-based nanocrystalline alloys using Yb-doped fiber laser with a wavelength of 1070nm by overlapping irradiation of the heated areas. The samples are annular cores rolled with 20μm-thick and 3.2mm-wide belts of amorphous alloy Fe73.5Cu1Nb3Si13.5B9, which have internal diameter of 14 mm and external diameter of 20 mm. Every side of the samples is irradiated for 15 min by fiber laser. X-ray diffraction and transmission electron microscopy (TEM) are used for microstructure analysis and observation. The samples irradiated by a defocus beam with a diameter of 7.1mm through a lens have better soft magnetic properties than directly by an original collimating beam with a diameter of 6.7mm. The dimension of homogeneous ultrafine grains is about 10nm with a bcc α-Fe (Si), which is the foundation of the excellent soft magnetic property. Uniform laser irradiation and the appropriate laser power are necessary for optimum microstructure and soft magnetic properties.
Challenges and Resolutions for Chinese International Engineering Projects
Authors: Dong Na , Tan Ru Wen , Xiong Feng
Published: February 2012

With more and more Chinese construction enterpries listed in the most competitive 225 international contractors, there are still many problems challenging the International Engineering Projects of Chinese construction contractors which can be verified by the recent light rail project carried out by the Chinese railroad construction company in Saudi Arabia. Inspired by the failure experience, the paper investigates deeply the major problems challenging the Chinese international contractors and finally some practical and urgent solutions are proposed.
Procedural Modeling Technology in Urban Design
Authors: Su Ping , Xiong Lu
Published: February 2012

Procedural modeling is one of the widespread uses in the field of computer graphics technology, even in urban design. According to the object of urban design, procedural modeling technology can be summarized in several methods: procedural modeling of cities, interactive procedural street modeling, automatically generating large urban environments based on the footprint data of buildings, cellular automata and software agents, shape grammars. In this paper, it will study on the main idea and content of each technology, in order to discover the new developing direction of procedural modeling design methods in the field of urban design.
Structure and Test of a Magnesium Alloy Pressure-Resistant Cabin
Authors: Ma Zhen Yu , Zhang Li Na , Su Yan Ping
Published: February 2012

Based on the military engineering applications of magnesium alloys and structure feature of light-weighting pressure-resistant cabin, this paper puts forward that foundry magnesium alloy may be applied to pressure-resistant cabin structure of the unmanned underwater vehicle(UUV). Selecting and using ZM5 casting magnesium alloy, typical structure test specimen of the water pressure-resistant cabin with thin-walled structure was designed and fabricated. Under the different outside hydraulic pressures, structure stresses and distortions of the specimen and it’s sealing performance were tested and measured. The test data and result show that the structure intensity and rigidity satisfy requirements, pressure-resistant structure and wedged-ring connection and also sealing performance stabilize. This experiment study establishes a foundation for magnesium alloy application research on the water pressure-resistant cabin structure of UUV.
Research on High-Pressure Hose Knitting Machine Knowledge Modeling Based on Ontology
Authors: Wang Liang , Wang Xi Wei , Wang Xi Jing
Published: February 2012

In view of knowledge management problems for the manufacturing industries , this paper presents an approach of knowledge organization and management based on ontology. Knowledge model of high-pressure hose knitting machine is completed by the use of ontology modularization technology and ontology integration technology.It achieves a greater range of knowledge sharing and reusing ,provides a technical support for the enterprise to speed up product design , and has a certain significance on knowledge accumulations and innovations of manufacturers.
Temperature-Dependent Photoluminescence Spectra of PbSe Quantum Dots for Temperature Markers
Authors: Gu Peng Fei , Wang Ya Nan , Cao Jia Jia , Yan Yu , Zhang Tie Qiang , Wang Yi Ding , Zhang Yu
Published: February 2012

We here report the temperature effect on photoluminescence(PL) spectra of PbSe quantum dots (QDs), which exhibit a strong temperature dependence on their spectra position and intensity. They potentially act as the temperature marker, sensing temperature variations and reporting temperature changes remotely through optical readout. In addition, the temperature sensitivity characterized by peak position of PbSe QDs was found to be 0.39nm/°C in a range of 10-100 °C.
Some Physical Properties of Cassava Concerned in Machine Design
Authors: Thangdee Danuwat , Wongpichet Seree
Published: February 2012

The Physical Properties of Cassava was studied as the data for design the cassava harvesting machine. The Kasetsart-50 variety was random checked from the 14 plot and the results were showed that: the normally cultural practice of farmer were grew cassava on the ridge form with about 680 and 960 millimeters of within row and between row respectively, and on the harvesting period the ridge was about 150 millimeters height, while the length, width, penetration of cassava bunches regard to row at 90 percentile were 501, 566, and 210 millimeters respectively. The average of cassava bunches weight was 4 kilograms. The bulk density of cassava bunches was 197 kilograms/cubic meter and the angle of friction on iron surface was 23 degrees.
A Dynamic Integrity Measurement Scheme Based on XEN
Authors: Si Zhi Gang , Li Ping , Chen Xin , Wan Ying
Published: February 2012

A trusted computing platform is designed based on XEN virtual machine, and a dynamic integrity measurement scheme is presented using hypercall mechanism. This scheme can solve the deficiency of limited scope or complicated structure comparing with other dynamic integrity measurement schemes.
New Approach to Delay-Dependent Control for Fuzzy Time-Delay Systems
Authors: Guo Gang
Published: February 2012

A new control method is proposed for stability analysis and stabilization problems for T-S fuzzy systems with time-delay. A new fuzzy Lyapunov-Krasovskii functional is introduced to establish some delay-dependent stability criteria. Based on parallel distributed compensation (PDC) scheme, a delay-dependent stabilization condition is derived and the corresponding controller can be obtained by solving a set of linear matrix inequalities (LMIs). Finally, simulation examples show that the effectiveness and benefits of the proposed method.
A BP Neural Network-Based Automatic Windshield Wiper Controller
Authors: Xu Hang Fei , Chen Hong Yan , Yuan Kun
Published: February 2012

This paper introduces a method of constructing the control model of automatic windshield wiper based on BP neural network. A model of pattern recognition based on BP neural network is built and train it with specialists’ experience data, and then tested it. The result indicates that this model based on BP neural network is effective to handle uncertainties and nonlinearities of the automatic windshield wiper system, without use of a sophisticated mathematical model.
Temperature Field Simulation on the Connecting Rod of High Speed Press
Authors: Tang Min , Jia Fang
Published: February 2012

This study is focused on the temperature field distribution of the connecting rod. The temperature field and the time for reaching thermal equilibrium condition of the rod in a certain working environment are examined by means of finite element analysis (FEA). A verification experiment is implemented on the connecting rod. Comparison between our experiment and simulation shows that simulation values are in good agreement with experimental data. Findings from the study are supposed to provide a basis for reduction of the thermal deformation of rod as well as for improvement of the thermal characteristics and precision of high speed press.
Modeling and Simulation of GCL 2nd Order Parallel Resonance System
Authors: Dou Hai Peng , Chen Xue
Published: February 2012

In this paper, the modeling method of GCL 2nd order parallel resonance system is introduced, and the system simulation model is established with Matlab /Simulink dynamic simulation software. The voltage response curves at different losses could be displayed easily by changing the model parameters. The results indicate that, based on Simulink, it is efficient in system analysis.
Security Research of Messaging Middleware JMS-Based
Authors: Wei Ying Li , Chen Tian Huang
Published: February 2012

Security of messaging middleware is the key issue to ensure the integrity of news transmission. By analyzing the defects on safety of current JMS-based messaging middleware communication model, elaborating several safety problems of messaging middleware from authentication, authorization, encapsulation and audit, this paper proposes a messaging middleware security model based on data encryption and digital signature technology, it encrypt messages with symmetric and asymmetric encryption algorithm and audit some safety-related events, then the security of message transmission has improved.
A New Buffering Layer of Photovoltaic Solar Cells
Authors: Li Ming Wei , Sun Nan Hai , Ge Yun Wang , Yao Bo Lei
Published: February 2012

This paper presents a new buffering layer(nickle oxide thin film) of organic solar cells. Nickle Oxide(NiO) thin film is a good alternative of hole tansporting layer. We investigates the film from physical and electrical aspects, such as morphology, deposition temperature, thickness etc. We find that the optimum fabrication conditions are: room temperature deposition, 10nm of thickness, and 30% oxygen proportion. The device strcture is Anode/NiO/P3HT[regioregular of poly(3-hexylthiophene)]: PCBM[(6,6)-phenyl C61 butyric acid methyl ester] /Al. And the best power conversion efficiency of device we got with NiO buffering layer is 2.49%, which is hundred times of ones without NiO buffering layer.
An Investigation Regarding Cram School Managers and the Percentage of them Achieving Government Employment
Authors: Kao Wei Feng , Chiu Chin Hsin , Ho Li Hsing
Published: February 2012

Abstract. The purpose of this paper is to disclose the number of Cram School managers who enter employment with the government and begin a career because of their cram school management in Taiwan. Because of the current financial and economic crisis, people find that they are living in an unstable environment. People desire to have a stable career, and considering the fact that a private company may not offer constant stability, they are looking to the government for employment. Their reasoning is that employment with the government offers the stability they are seeking regardless of the economic crisis. They are looking for a career that will last until they retire. Many have tried several times to pass the exam in order to achieve their dream job. In 2011 there were 135,004 people who took the exam, but only 1.61% were offered a job. This research is based on personal interviews and SWOT (Strengths, Weaknesses, Opportunities and Threats) analysis.
Analysis of Chord Vibration Based on Finite Element
Authors: Jun Zhang , Juan Tao , Zhang Cheng , Teng Zhang , Chao Chen
Published: February 2012

The chord vibration frequency analysis is carried out based on the theory of vibration of continuous systems. The finite element software is used to analyze frequencies of different chords, which is compared with the theoretical frequency. The relevant conclusions demonstrate that studies on guitar chords’ sound quality and intonation using proposed finite element method are doable and necessary. It has certain directive significance in guitar production process.
The Study of Dynamic Characteristic of Full Hydraulic Power Steering System Based on AMESim
Authors: Zhu Qing , Liu Gang , Song De Chao
Published: February 2012

The simulation model of full hydraulic power steering system whose key part is full hydraulic power steering unit is established based on AMESim. According to the parameters from one articulated construction vehicle, the dynamic characteristic of the full hydraulic power steering system can be studied. Through the input from steering wheel and external load in different situations, the response curve is obtained, that can provide references for the design of full hydraulic power steering system in articulated construction vehicles.
The Quantitative Diagnosis Technology of Engine Fault
Authors: Wang Liang Bin , Ge Yun
Published: February 2012

There is much technical information of the engine running in vacuum △P in engine air intake system. According of the engine intake system analysis of the formation mechanism of vacuum △P, three-gradient analysis model is established. Then put forward the principle of quantitative diagnosis technology used the △P in automobile fault. Establish the concepts, such as "illegally gas", "quantitative diagnosis" in engine air intake system. Try to build the application system of quantitative diagnosis technology in modern automotive fault.
Based on the Interconnection of Gas Monitoring System Research and Design
Authors: Liu Qiang , Wang Jun , Zu Ning
Published: February 2012

This paper mainly introduced the GPRS wireless data transmission technology constitutes a new type of gas monitoring system, which is suitable for modern intelligent residential family user gas monitoring, the gas leakage and abnormal gas monitoring and alarm control, but also for the gas company to provide reading, saving a lot of manpower, material and financial resources.
The Design of the FBG Sensor System for Strain Monitoring Specific to the Key Stratum in Casing Annulus
Authors: He Jun , Dong Hui Juan , Liu Ren Bing , Pan Hong Liang , Cai Yong , Wang Si Ying
Published: February 2012

Due to the tube is suffering deformation and damage by a series of factors, such as external force, chemical corrosion etc. The production of oil and the oil wells' service life is directly affected. As the number of casing damage is increasing year by year, the casing damage especially the casing inspection of key layer has become the focus of oilfield development process. The height of critical layer is usually about 5m, so the author puts forward that it's much more accurate to use the distributed FBG sensor as the short distance measurement method to guarantee the precision, and coupled with the traditional temperature compensation method of FBG strain monitoring. With a special installation process and the application of 40-Caliper logging tool to get the FBG' s azimuth, we get real-time strain data in the process of installing casing pipe. This paper analyzes the variation of value of the casing strain in each installation stage, the theoretical calculation results are basically the same with the data got by XMAC logging method. This proves the reliability of the distributed casing deformation monitoring system which is specifically used for the key layer of casing annulus.
Research on Geometric Complexity and Layered Organization of Engineering Drawing Information
Authors: Lv Yong Feng , Xue Wei Zhu
Published: February 2012

The key of engineering drawing interpretation is to dig the information of engineering drawing. Considering the features of decentralizing, hiding and blurring in drawing information, this paper presents geometry complexity of drawing information. Based on this, the graphic information and dimension information that compose the drawing information are organized in three layers: discrete information organizing, same view information organizing, different views information organizing.
High- Resolution Numerical Model for Dam-Break Flow in an L-Shaped Channel
Authors: Liu Y. L , Wei W.L
Published: February 2012

A high-resolution numerical model for dam-break flow in an L-shaped channel was presented based on using the two-step finite-volume component-wise TVD (total variation diminishing) scheme, by which second-order accuracy in both time and space is achieved. Numerical simulation for open L-shaped channel flow was implemented, and velocity and water surface were obtained.
Fatigue Analysis of the Rotor Shaft on a High Speed Traction Motor
Authors: Xiang Hui Yu , Li Zhi Qiang , Leng Chong Jie , Hu De Mao
Published: February 2012

Rotor shaft is an important part in the high speed traction motor. In the process of the motor running，some rotor shaft may show the symptoms of fatigue crack，fracture and other issues．Therefore，it is essential to analyze its fatigue condition for these potential problems in the product design stage．In this paper，finite element analysis software NX. Nastran is used to analyzing the rotor shaft of traction motor from structural strength，fatigue strength and fatigue life respectively．The fatigue damage area and dangerous zone of the rotor shaft as well as its fatigue life can be predicted according to the simulation results，and which could provide a critical review for the following study and structural design of the traction motor．
Study of MFCS with Disturbances
Authors: Wu Shu Jing , Wang Da Zhong
Published: February 2012

In this paper, we propose a study of the (MFCS) model following control system with disturbances. With the MFCS method, we obtain a simple input control law. The bounded property of the internal states for the control is given and the utility of this control design is guaranteed. In this case, a new criterion is proposed to ensure that internal states are stable.
Bi-Probability Fatigue Life Prediction for Bridge Crane Structures
Authors: Mei Xiao , Dong Da Shan , Teng Yuan Yuan
Published: February 2012

Fatigue crack is very dangerous for safely operating of steel structures. To estimate precisely fatigue life of bridge cranes, the randomness of lifted load and trolley’s position should be considered. Therefore, bi-probability fatigue life prediction method, namely load and position probability, is put forward based on the miner linear cumulative damage theory. Stress cycle spectrum is constructed based on real-time monitoring data by rainflow counting method. This method can successfully explain the existence of girder cracks in a typical bridge crane RMG, so it would provide valuable reference for maintenance decision of in-service cranes.
Applications and Installation Skills of Current Intrusion Detection Systems
Authors: Yang Ju Qing , Liu Jiao Yue
Published: February 2012

The compositions, principles and features of infrared sensors, ultrasonic sensors, microwave sensors and combined sensors in intrusion detection system are discussed in this paper, then the applications and installation skills of several common intrusion detection system are introduced.
The Performance Analysis on the 75°C Hot Water of the Air Source Heat Pump Using R134A
Authors: Zhu Xing Wang , Hu Chun Xia , Lv Yan Li , Wang Chao Xin , Su Yu Gui
Published: February 2012

In this paper the system of air-source heat pump water heater(ASHPWH) using R134A to get 75°C hot water is proposed. The experiments on the performance of ASHPWH are conducted in two typical conditions, one for 7°C dry bulb temperature and 6°C wet bulb temperature, the other for 20°C dry bulb temperature and 15°C wet bulb temperature. In addition the variations of the suction temperature, the exhaust temperature, the suction pressure, the exhaust pressure, the transient heat capacity, the input power and COPs with the changing of the hot water tank temperature are analyzed. The results show that 75°C hot water can be produced steadily and the COPs are 2.84 and 3.68 respectively in two different conditions, therefore the ASHPWH has good energy saving effect.
Designed and Development of Embedded QR Code Bar Code Recognition System
Authors: Cheng Zhi Mei , Zhu Hong Qin
Published: February 2012

Based on J2ME technology,develop a Embedded QR Code bar code recognition system.This system integrated image graying,image binarization, image rotation and other processing methods to realize bar code pre-process, anti-perspective transformation algorithm is adapted to correct distortion pictures,solved mobile taking picture on problems of image lean, distortion illumination on QR code effectively, have higher identification of image under different lighting conditions.
Surface Modification of Natural Rubber Latex Film Using Photocrosslinkable Chitosan
Authors: Yu He Ping , Zeng Zong Qiang , Liu Hong Chao , Luo Yong Yue
Published: February 2012

Surface modifications of natural rubber latex films were carried out to improve the hydrophilicity by UV-induced immobilization of water-soluble butyryl derivative of chitosan using the photosensitive hetero-bifunctional crosslinking reagent, 4-azidobenzoic acid. The effects of the concentration of modified chitosan solution and UV irradiation time on the water contact angle values of natural rubber latex films were studied. ATR-FTIR analyses confirmed that the O-butylrylchitosan molecules were covalently bonded onto the surface of natural rubber latex film. The water contact angle value of natural rubber latex film which is about 95o reduces to 55o significantly with the introduction of O-butylrylchitosan. The results indicate that the hydrophilic behaviour of natural rubber latex film has been improved by immobilization of O-butylrylchitosan.
Facile Synthesis of Pyrene/Pyrrole Copolymer with Strong Green Fluorescence
Authors: Hou Zhen Zhong , Yang Qing Hao , Li Ying
Published: February 2012

The pyrene/pyrrole copolymer (Pn/Py copolymer) has been sucessfully synthesized by the facile chemically oxidative copolymerization. UV-vis and FT-IR spectra are used to investigate the molecular structure of the copolymer. The results show that pyrene and pyrrole units in the copolymer chain are interconnected via α, α-coupling to form a linear structure. At the same concentration, the copolymer solution exhibits the strongest green fluorescence with a maximum emission at 503 nm and a large stokes shift of about 113 nm by fluorescence spectrometer. The excellent fluorescence of Pn/Py copolymer may be due to its better planar molecular structure and higher large π-conjugation, that is confirmed by UV-vis spectra and molecular simulation.
Study on the Structure and Liquid Crystal Behavior of Cyclohexane Liquid Crystal Monomer
Authors: Li Ying
Published: February 2012

Chemical structure and liquid crystal behavior of mesogenic monomer(Trans, trans)-4-propyl-4’-vinyl- bicyclohexane(3HHV) with platelet texture of a blue phase and mesogenic monomer(Trans, trans)-4-propyl-4’-propenyl –bicyclohexane(4HHV) with cholesteric phase were studied. The chemical structure of mesogenic monomers were determined by Fourier transform infrared spectroscopy, and Hydrogen-nuclear magnetic resonance spectra. Liquid crystal behavior of mesogenic monomers were analyzed by polarizing optical microscopy and X-ray diffraction. Thermal properties of mesogenic monomers were researched by differential scanning calorimetry. The results were that: 3HHV showed the platelet texture of a blue phase was considerably different from single color texture of blue phase we always refer to, and assuredly belong to a new kind of blue phase liquid crystal. These two kinds of cyclohexane liquid crystal monomer also showed good thermal stability.
Finite Element Modeling Modification of Solar Sweeper Frame Based on Modal Testing
Authors: Yu Xian , Guang Yang
Published: February 2012

Frame of solar sweeper is complexly welded structure with thin steel plate. A three dimensional model of solar sweeper frame was bullied up in CATIA and finite element mesh was finished in Hypermesh. ANSYS program was applied to modal analysis. Connections and constraints of finite element model(FEM) would be modified through a comparison with modal testing results. It shows that analysis results of distributing tendency and concrete value ranges are coincident well with test results, the max and min error is 1.54% and 8.15% separately. From the results, it could be concluded that accurate dynamic response can be gained based on modified FEM.