bluuebunny/crossref_metadata_2025 huggingface dataset:
Morphology of SiC Whisker in Whisker Reinforced Reaction Bonded SiC Composite
Authors: Li Shuang , Zhang Yu Min , Han Jie Cai , Zhou Yu Feng
Published: February 2012

SiC whisker was introduced into reaction bonded silicon carbide to produce high performances composite by slip casting and reaction sintering. This study aimed at morphology of SiC whisker in the reaction bonded silicon carbide ceramics. The whisker was homogeneously dispersed into SiC/C suspension by ball-milling and ultrasonic dispersion. By chemical etching, the whisker displays the original burl profile on the polished surface of the composite. The raise of whisker fraction leads to an increase of porosity of the green body; and thus a decrease of density of the sintered body. For the specimen with 25 wt.% whisker, the rapid reaction of carbon with excess molten silicon leads to the missing of burl profile on the whisker surface. It is speculated that β-SiC on the whisker surface dissolved in the molten silicon during liquid silicon infiltration.
Experimental Investigation of Convective Heat Transfer in Circulating Water System
Authors: Zhang Shao Bo
Published: February 2012

The laminar convective heat transfer behavior of CuO nanoparticle dispersions in water with three different particle sizes (23 nm, 51 nm, and 76 nm) is investigated experimentally in a flow loop with constant heat flux. The main purpose of this study is to evaluate the effect of particle size on convective heat transfer in laminar region. The experimental results show that the suspended nanoparticles remarkably increase the convective heat transfer coefficient of the base fluid, and the nanofluid with 23nm particles shows higher heat transfer coefficient than nanofluids containing the other two particle sizes about 10% under the same Re. Based on the effective medium approximation and the fractal theory, the effective thermal conductivity of suspension is obtained. It is shown that if the new effective thermal conductivity correlation of the nanofluids is used in calculating the Prandtl and Nusselt numbers, the new correlation accurately reproduces the convective heat transfer behavior in tubes.
Isolation and Identification of a Chitin Degrading Bacterium Aeromonas SP D5-23 and Properties of Chitinase
Authors: Gou Jing Xuan , Dong Wen Bin , Zeng Qiao , Jin Lei
Published: February 2012

Chitin is an abundant biopolymer like cellulose that is rather resistant to degradation. In order to develop a bio-digesting method, soil sample in Qinling Mountain were collected for screening the bacteria with high chitinase activity by method of the transparent circle. The strain D5-23 was isolated and screened out from soil, which was found with amazing chitinase acitivity. The ratio of transient circle and colony circle is no less than 10. The strain was then identified as Aeromonas sp according to the sequences of 16S rDNA and morphological analysis. The enzyme activity was studied further, ,data shows that the optimum temperature was 45°C, which is similar to other Aeromonas sp, wheras the optimum pH is 5 and 9, which is more similar to Vibrio alginolyticus TK-22.
Study on Elliptical Cross-Section Rod of Shape Memory Alloy Subjected to Torsion Deformation
Authors: Zhou Bo , Li Xu Kun , Hu Bin
Published: February 2012

This paper focuses on the thermo-mechanical behaviors of shape memory alloy (SMA) elliptical cross-section rod subjected to torsion deformation. The stress solution in the elliptical cross-section is derived according to linear elastic mechanics. The phase transformation behaviors of the elliptical cross-section rod are described based on the phase transformation model developed by Zhou and Yoon. The phase transformation zone in the elliptical cross-section is numerically determined and discussed.
Application of Fuzzy Neural Network Controller for Cement Rotary Kiln Control System
Authors: Xue Zeng Tao , Li Zheng
Published: February 2012

This paper presents the design and application of fuzzy neural network control system for the rotary cement kiln system. Due to the dynamic characteristics and reaction process parameters are with features of large inertia, pure hysteresis, nonlinearity and strong coupling, the fuzzy neural network controller combining both the advantages of neural network and fuzzy control was applied. The fuzzy neural network is an adaptive control process whose parameters can be adjusted by learning algorithms automatically which is aimed to eliminate the shortcomings of conventional control methods. The main control system structure includes mainly the pressure control loop, the burning zone control loop and the back-end of kiln temperature control loop. Simulation results show the effectiveness of the control scheme with satisfied dynamic performances on response time and overshoot.
Research on the Generation of Casting Model for Cast then Machined Parts
Authors: Chang Zhi Yong , Wei Hai Feng , Zhao Jie
Published: February 2012

The transformation from part design model to manufacturing model is the key technology to realize the integration of CAD/CAPP/CAM, and the key factor is the transformation from design model to blank model .a method of generating casting model for cast then machined part is proposed. The methodology is composed of classifying the part surfaces according to manufacturing requirements, constructing a improved EAAG to recognize simple features, filtering the castable simple feature, enveloping the volumetric machining features containing nonnormal surfaces by means of constructing minimal enveloped auxiliary planes. An example is demonstrated to verify the validity and the effectiveness of the method.
Observation of Wear in PEEK Race - PTFE Retainer Hybrid Polymer Bearings under Dry Contact
Authors: Mizobe Koshiro , Santos Edson Costa , Honda Takashi , Koike Hitonobu , Kida Katsuyuki , Kashima Yuji
Published: February 2012

In order to establish an optimal combination of materials used for polymer thrust bearings, two types of components (polyetheretherketone (PEEK) races - polytetrafluoroethylene (PTFE) retainer and PEEK races – PEEK retainer) were tested by rolling contact fatigue. Their wear properties were investigated and it was concluded that using a PTFE retainer, the wear loss was improved due to PTFE wear debris attaching to the wear track and acting as a lubricant.
Characteristics Analysis of High Birefringence Photonic Crystal Fiber with Pentagonal Air-Core
Authors: Wang Wei , Yang Bo , Song Hong Ru , Fan Yue
Published: February 2012

A new type of photonic crystal fiber (PCF) with pentagonal air-core is proposed, which consists of octagonal air holes in the cladding. In addition, five elliptical air holes are embedded in the inner layer to enhance the birefringence characteristic. Characteristics of this PCF are analyzed by using of Finite Element Method (FEM). Numerical results show that this kind of PCF exhibits high birefringence with the level of 0.001 after optimization, which will find application in optical sensing systems.
Numerical Simulation on the Combustion Characteristics of Armored Vehicle Diesel in Plateau Area
Authors: Lu Feng , Guo Meng Chao , Guo Guang Jun
Published: February 2012

A simulation model on working process of certain armored vehicle turbocharged diesel engine is proposed with Hiroyasu combustion model.Then the combustion characteristics of the diesel in 4km altitude is calculated. The combustion process is improved via adjusting optimum advanced injection angle(θi) which performed in plateau area.The results show: when the altitude is from 0m to 4000m, the center of gravity for heat release rate is delayed 7°CA,HRRmax (maximum value of Heat Release Rate) reduces 0.009KJ/°CA, pmax (maximum value of cylinder Pressure ) reduces1.6MPa,Tmax(maximum value of combus -tion temperature ) increases 220°C above. When θi is advanced during possible scope, HRRmax increases 0.008KJ/°CA,pmax increases 1.0MPa,Tmax increase 150°C. In view of the restriction of the pmax and the maximum increase rate of p, the optimum θi is fixed on to advanced 4°CA. The simulation results supply a research foundation for the improvement of diesel performance in Plateau.
Calculation of Array Gain in the Reverberation Field
Authors: Han Rong Rong , Sun Hui
Published: February 2012

If the number and the location of each cell in the array is determined, the space array processing gain is constant in designing the uniform line array in isotropic acoustic field. However, the spatial distribution of reverberation field will affect against the array gain, when the arrays are in anisotropic reverberation field. Reverberation is the unique interference of active sonar, and the energy distribution of space in reverberation field is anisotropic and random. Therefore, the arrays gain problem can be get in researching on the correlation between arrays in the reverberant field. In this paper, the calculation method is simple and useful which is calculated line array gain using the correlation coefficient in the reverberant field.
Color Quantization Based on Gaussian Mixture Mode
Authors: Jin Qiu Chun , Tong Xiao Li
Published: February 2012

Color quantization is an important technique for image analysis that reduces the number of distinct colors for a color image. A novel color image quantization algorithm based on Gaussian mixture model is proposed. In the approach, we develop a Gaussian mixture model to design the color palette. Each component in the GMM represents a type of color in the color palette. The task of color quantization is to group pixels into different component. Experimental results show that our quantization method can obtain better results than other methods.
Ultrasonic Lamb Wave Measurement and Data Analysis System
Authors: Chen Xiao , Wu Hai Kun
Published: February 2012

Ultrasonic Lamb wave detection technology is an important, nondestructive testing technology for the damage of plate. In order to inspect the plate material nondestructively, an ultrasonic measurement system is investigated and the principle and structure of the system are described in this paper. The CTS-3000 instrument is used to excite and receive ultrasonic signal, which is delivered to computer through RS232 interface. Then the signal collected by the computer is analyzed with the 304 stainless steel as the experiment material. The results show that the proposed system can realize the measurement of ultrasonic with simple instrument structure and have great potential for future applications.
On Robust Stability for Stochastic Neural Networks of Neutral-Type with Uncertainties and Time-Varying Delays
Authors: Liu Guo Quan , Yang Simon X.
Published: February 2012

This paper is concerned with the robust stability analysis problem for stochastic neural networks of neutral-type with uncertainties and time-varying delays. Novel stability criteria are proposed in terms of linear matrix inequality (LMI) by defining a Lyapunov-Krasovskii functional and using the stochastic analysis technique. Two examples are given to show the effectiveness of the obtained conditions.
Range-Free Node Localization Schemes for Wireless Sensor Networks
Authors: Shi Qin Qin , Zhang Jian Ping , Liu Yun Xiang
Published: February 2012

Two range-free node localization schemes modified from the conventional DV-Hop scheme are presented in this work. Different node position derivation algorithms are used to enhance the localization accuracy of DV-Hop. The principle of the algorithms and the improvement approach are illustrated. Simulation shows that the modified schemes outperform the original scheme in terms of the localization accuracy as the network connection topology varies.
A Study of BPEL-Based Framework for Optimal Composition of Dynamic WEB Services
Authors: Wang Ling Fang , Gao Wu Qi
Published: February 2012

Based on BPEL,Web services can be composed into complex business process. However, BEPL does neither support to modify Web services during the execution of business process nor provide the mechanism of optimal service. In order to solve these problems, this paper gives a dynamic Web services optimal composition framework grounded on the BPEL and QoS. By using the dynamic binding function of QoS components and the dynamic UDDI discovery of Web service, the business process run-time dynamic selection of Web service will be realized. Web service optimal composition is implemented by Froyd’s shortest path algorithm. So the efficiency in execution of business process will be improved as well.
Requirements Analysis for Co-Evolution of Business and Information Technology
Authors: Khan Muhammad Asif , Zedan Hussein
Published: February 2012

Organizations increasingly are adopting information technology (IT) in order to automate their business processes to be competitive in marketplace. The greater evolving interdependence between information technology and business processes has created various opportunities for technologies and businesses. Therefore, co-evolutionary changes generate successes in business organizations. As evolution requirements either in business process or information technology can have an impact onto another, it is necessary to understand and manage the requirements in such a manner that consistency is maintained. This paper offers an insight of requirements analysis for co-evolution of business and IT. In this study we have used an observation of a bank in Saudi Arabia to assess the requirements of co-evolution of business and IT.
Research and Simulation on the Image Segmentation Algorithm with Corn Image Based on HSI Color Model
Authors: Hou Xue Feng , Shang Yuan Yuan
Published: February 2012

Image segmentation is one focus of digital image processing. In this paper, fourteen different kinds of classical image segmentation algorithms are studied and compared using corn image and simulating in MATLAB based on HSI color model. The result reveals that the method that using H component based on HSI color model to deal with the histogram threshold algorithm and Laplace edge detection algorithm is effectively extract the plant from the corn image
The Positive Analysis of the Impact on Operation Performance of Non-Agricultural Business for Agricultural Listed Companies
Authors: Chen Qin , Zhang Xiao Mei
Published: February 2012

There are some significant problems in the process of development of agricultural listed companies ,especially is the existance of non-agricultural business. The paper uses the Factor Analysis to analyse the influence on operation performance of non-agricultural business for agricultural Listed Companies in china.According to empirical analysis,the conclusion is that: business on the non-agricultural term cut down the performances of the Agricultural Listed Companies,agricultural listed companies should not carry on the expansion on aspects of non-agricultural
The Synthesis and Ion-Exchange Property of Li+ Memorized Spinel Al1.5Fe0.5(PO4)2
Authors: Jiang Jin He
Published: February 2012

Compound Al1.5Fe0.5(PO4)2, a inverse spinel-type metal compound, was prepared by a solid state reaction crystallization method. The Li+ extraction/insertion with this material were investigated by X-ray, FT-IR spectroscopy, and Kd measurement, The chemical analysis showed that the Li+ extraction/insertion be progressed mainly by an ion-exchange mechanism. The acid treated samples had an ion exchange capacity of 8.7mmol/g for Li+. It had a memorial ion-sieve property for Li+.
Research on Performance Evaluation to Airlines Based on Gray Comprehensive Theory
Authors: Li Xiao Jin , Si Qian , Deng Jian
Published: February 2012

This paper adopts the method combining AHP and gray comprehensive evaluation to evaluate the operation performance of four largest domestic airlines and ten airlines that are famous around the world. Through the evaluation, it can be concluded that, compared with the excellent foreign airlines, the operation performance of the four largest domestic airlines is comparatively lagged behind. Among all the evaluated items, the repayment capability of the four largest domestic airlines is the worst which shall draw great attention of the enterprise leadership and other stakeholders
Design for Testability of Multi-Mode Satellite Navigation Baseband SoC Chip
Authors: Gao Shen , Wang Qi , Zhang Yong Xue
Published: February 2012

In this paper, a design for testability methodology for a multi-mode navigation baseband SoC chip was presented, merging the various DFT techniques including boundary scan, MBIST, and full scan based ATPG. Implementation the technology of pattern compression was introduced in detail. Test results showed that this strategy is feasible, and meets the requirement of engineering applications. The test coverage of this chip is 97.53%, in the condition that, almost 30-fold test pattern compression is achieved
Finite Element Contact Analysis of Locomotive Traction Gears
Authors: Bao Jun Hua , He Wei Dong
Published: February 2012

The parametric solid models and assemble model are built in Pro/Engineer software system on the base of basic parameters of locomotive traction gears. The dedendum transition curves of teeth are fit by inputting the accurate coordinates of real curve of tooth that machined by gear hob after analyzing the envelopment processing of tooth. Assembling the driving and driven gears in Pro/Engineer system, and then the assemble model is imported into ANSYS software system, the settings of finite element analysis are defined, the finite element contact analysis of the driving and driven gears is done in ANSYS software. The accurate stress distributions of contact stress of teeth surfaces and the bending stress of dedendum of teeth are obtained base on the simulation calculations and post-processing in ANSYS. The calculation results are accurate compared with the real stress condition of teeth, so it can be the base of optimization design of gears for further research.
Design of CAN-Bus Based Yarn Feeding Control System for Carpet Tufting Machine
Authors: Chen Guang Feng , Zhai Lin Lin , Zou Kun , Yang Yi , Wang Wei Bin
Published: February 2012

This paper proposed a CAN-bus and stepper motor based yarn feeding control system for tufting carpet machine. Base on requirement of yarn feeding devise control system architecture. Control system adopts the industrial computer as the master platform and user interface, the lower computer consists of yarn feed step motor controller, speed synchrony controller and yarn guiding controller. Design the communication protocol and the control logic. Through establishing control system prototype system to verify the system function, test results show that the design scheme is feasible
Research on Compensation Method of Temperature Drift in Pressure Sensor Using Double Wheatstone-Bridge Method
Authors: Luo Xian Long , Xu Tian Bai , Bi Li Hong
Published: February 2012

this article deals with the influence of temperature on the output sensitivity of the piezo-resistive pressure sensor. In order to reduce the temperature drift of output for the piezo-resistive pressure sensor, the double Wheatstonce-bridge method is adopted to test the sensor with the ternperature controlled at the range of 300~373 K. Tlre results indicate that the temperature drift of the sensor output can be lowered by over 70% to improve surveying accuracy. Pressure senter is widely applied to many fields of the industry, so its accuracy can directly influence the quality of surveying system. Since the piezo-resistive pressure sensor is mostly made of semiconductor materials, the sensitivity and linearity of silicon sentor will be affected to some extent, among which non- linearity is connected with dopant density, temperature and pressure. In ideal condition, four resistor strips are equal in variables with temperature changing, in this way, electric bridge can keep balance to eliminate the effect of tempereature on the sentor. But it’s not the case in reality, temperature drift of output for the piezo-resistive pressure sensor is unavoidable, so some technical methods should be adopted to control the phenomenon. Temperature drift, playing an important role in affecting the quality and accuracy of sentor, has drawn public concern. Document 2 intrduces how to adjust supply voltage to control temperature drift of output for the piezo-resistive pressure sensor. Document 3 intrduces temperature compensation in the sensitivity of sentor. This article aims at making use of four resistors with negative temperature and Wheatstonce-bridge to reduce temperature drift and improve output accuracy of pressure sentor
A Nonparametric Study on the Effects of Energy Consumption from some Energy Materials to Economic Growth in China
Authors: Chen Jian Bao , Xu Zhen
Published: February 2012

Based on the panel data of 29 provinces, municipalities and autonomous regions in China from 1995 to 2009, this paper uses non-parametric panel data models to mainly study the influences of coal, electricity, oil consumption to GDP. We find the following results: (1) local linear kernel estimation method shows that coal, electricity and oil consumptions have significant positive impacts on GDP; (2) the pointwise regression estimates of output elasticity for coal, electricity and oil consumptions with respect to five explanatory variables have shapes including “U”, inverted “U”, increasing and decreasing types
Preparation and Characterization of Antibacterial Cap-Shaped Gold Nanoparticles
Authors: Xie Yu Shan , Man Shi Qing , Tan Shao Zao
Published: February 2012

Gold nanocaps were prepared by vacuum depositing gold films onto self-assembled monolayers of SiO2nanoparticles, and characterized using SEM, AFM and XRD. Its antibacterial activity was investigated. It was found that gold films with cubic structure have completely covered self-assembled monolayers of SiO2nanoparticles. The gold nanocap, comprising of 20 nm gold film and 450 nm SiO2nanoparticles, possesses high antibacterial activity.
Trend Extraction in Vibration Signal Based on EMD
Authors: Dong Yu Hua , Zhang Jun Xing
Published: February 2012

This paper proposed a de-trend method for vibration signal of telemetry based on the empirical mode decomposition (EMD) by correlation coefficient matrix. The signal is decomposed to a series of intrinsic mode component and the remainder item by EMD. It mainly distinguishes between the remainder item and the signal trend, according to the correlation coefficient matrix to determine whether some intrinsic mode component belongs to the trend item or not. The results show that signal trends can be extracted accurately through the effective combination EMD with correlation coefficient matrix and the proposed method has good applicability for different signals and different trends.
Data Reading and Processing of Ground Penetrating Radar Based on Multi-Layered Noise Control Materials
Authors: Xu Hui , Ma Jun Jie
Published: February 2012

Removing interferential noise of ground-penetrating radar(GPR) from the echo signal can accurately get the information of underground targets. Raw data reading is a critical step for GPR signal processing. In this paper, the data structure of RIS-K2 is analyzed. Some C++ programs have been written to read the raw data of GPR and the sampling points in form of decimal data are obtained. Then, the data are analyzed and processed with wavelet algorithm in MATLAB. The results show that the noise of the echo can be effectively removed with wavelet denoising method, and it is helpful to determine the underground targets accurately
Study on Water Resources Management of Nantun Coal Mining Area
Authors: Yang Sai Ming
Published: February 2012

Freshwater is in shortage in many parts of our country. Study on sustainable use of water resources is an inportant topic.Based on analyzing the status of destroy and pollution of water resources in Nantun coal mining area, Countermeasures of water resources protection and pollution prevention in Nantun coal mining area are put forward.These are beneficial to sustainable use of water resources in Nantun coal mining area and regional sustainable development.
A Novel Resource-Optimized Parallel Descrambling Structure for Optical Backbone Transmission Network
Authors: Zuo Zhen , Lu Qin , Zhang Yi Meng , Huang Zhi Ping
Published: February 2012

High speed of optical backbone transmission network makes descrambling at receivers a challenge. Considering the limit process frequency of general hardware device, parallel structure is used in descrambling. The general parallel descrambling structure (GPDS) uses too many multi-level xor operations which are complex and may cause delay to affect the hardware performance. To reduce system complexity, we have designed a memory-based parallel descrambling structure (MPDS). MPDS usually covers a large amount of memory. To overcome the shortcomings of GPDS and MPDS, a novel resource-optimized parallel descrambling structure (ROPDS) is proposed. Evaluation results show that ROPDS reduces the complexity of parallel descrambling, improves the hardware performance, and makes the most effective use of the logic and memory resource.
Zero-Voltage-Switching Buck-Boost Converter with a Coupled Inductor Based on Magnetic Materials
Authors: Do Hyun Lark
Published: February 2012

A zero-voltage-switching (ZVS) buck-boost converter with a coupled inductor based on magnetic materials is proposed in this paper. An auxiliary circuit consisting of an additional winding to the main inductor, an auxiluary inductor, and an auxiliary diode is utilized to obtain the ZVS operation of power switches. Due to the ZVS operation, the switching loss is significantly reduced. The operation principle and steady-state analysis of the proposed converter are provided. A prototype of the proposed converter is developed, and its experimental results are presented for validation
The Embedded Quality Control System of Product Manufacturing Process
Authors: Du Li , Ke Yun , Su Song
Published: February 2012

In this paper, the embedded quality control system of product manufacturing process is established to provide sophisticated aids between the modern production and SPC quality management methods. Using a variety of data interface of embedded system, the system adopts automatic or semi-automatic way to collect data to ensure the data accuracy, a recognition algorithm of control chart is contrived by using neural network to achieve the early warning of quality problems and to hint the cause of failure, so that the embedded SPC systems can provide timely and accurate decision-making information for the on-site management personnel
On General Scheme of Railway Bureau Emergency Command System
Authors: Zhang Yan Chun , Wang Qi , Wang Meng Jun
Published: February 2012

In order to prevent and handle all kinds of railway emergencies efficiently and improve emergency management efficiency and capability of Railway Bureau, it is of great importance to construct the emergency command system which takes geographic information system as core and is visualized, intelligent and networking. Based on the reality of railway emergency management, the three level structure of emergency command system, which takes the Railway Bureau as core and consists of the Ministry of Railways, the Railway Bureau and Divisions, is proposed. The overall frame structure of the system which consists of user layer, interface layer, application service layer and data layer is designed and the function of the system is analyzed. Some key technologies namely geographic information service platform technology, information resources integration technology and decision support techniques are introduced.
Preparation and Immunological Traits of Monoclonal Antibody against Sarafloxacin
Authors: Fan Guo Ying , Jiang Jin Qing
Published: February 2012

Through cell fusion technology, five hybridoma lines of sarafloxacin (SAR), named S1-B2, S2-C6, S2-E7, S3-C5, and S3-E5, were identified and their corresponding mAbs were of the IgG1 isotype with a k light chain. The Kaffs of all mAbs were between 2.8 and 4.6×109 L/mol. The titers and IC50 values of purified ascite fluids were in the range of 0.512–2.56×106 and 0.32–0.48 ng/mL, respectively. The performances of S1-B2 and S2-C6 were more consistent in the stability experiments. Based on the S1-B2 hybridoma, an icELISA method was developed. The dynamic range was from 0.004 to 18 ng/mL, with a detection limit for the assay and IC50 values of 0.002 and 0.32 ng/mL, respectively. Therefore, the establishment of these hybridomas may provide an alternative method for the detection of SAR residues in food-original animals.
A Fabrication of the High Emitter-Isolating-Layer for Printed Cold Cathode in Field Emission Display Panel
Authors: Li Xiao Quan
Published: February 2012

Using black insulation slurry as manufacture material, the high emitter-isolating-layer was fabricated on the cathode plate. The high emitter-isolating-layer which possessed good insulation performance was composed of many parallel emitter-isolation-stripes, which the bottom cathode electrode would be exposed in the center of the emitter-isolation-stripe. The carbon nanotube paste was prepared onto the cathode plate to form the field emitters. And the field emission display panel with high emitter-isolating-layer was demonstrated, which the better field emission property including the large emission current and stable electron emission was confirmed.
Studies of an Improved LMBP Model for Predicting Potential Distribution of Insects
Authors: Ni Yuan Ping , Ye Hui
Published: February 2012

An improved LMBP algorithm model was presented based on analysing the shortcomings of back propagation (BP)neural network and discussing the idea of Levenberg-Marquardt (LM)algorithm. The simulating data proved that the improved LMBP model was able to overcome its local minimum and increase the converging speed in comparison with BP algorithm. Meanwhile this model was applied to predicting the potential distribution of insects. Here we take an example of oriental fruit fly Bactrocera dorsalis. The experimental results show that the algorithm model has a capacity of learning and can solve the forecasting problem in potential distribution of oriental fruit fly. The algorithm model is better than other traditional method and is very useful and efficient in practice
Design and Tests of a Water-Cooling Micro-Channel Heat Sink Made by WEDM
Authors: Liang Kuo Zoo , Wang A Cheng , Liu Chun Ho , Tasi Lung , Lin Yan Cherng
Published: February 2012

The purpose of this research is to design a new heat sink of water-cooling. With the aid of CAE (computer aided engineering), WEDM (wire electrical discharge machining), and the concept of micro-channel design, a heat sink of water-cooling can then be built with the merit of a smaller volume and lower thermal resistance. From this paper, results of the experiment indicate that the thermal resistance of heat sink can be decreased to 0.12 °C/W with input power of 60W, flow rate of 0.6 LPM, and a better heat dissipation with the in input power of 100W or 140W can be revealed.
Mar-M247, Haynes-230 and Inconel-718 Study of Machining Characteristics for Ni-Based Superalloys on Friction Drilling
Authors: Yang Lieh Dai , Ku Wei Liang , Chow Han Ming , Wang Der An , Lin Yan Cherng
Published: February 2012

One of the difficulties for Ni-based superalloys application is its manufacturability。Traditional manufacturing process can obtain high strength due to the material characteristic with high strength at high temperature, others like low heat conducting coefficient and process hardening, therefore it could be thought of as a difficult processing material, simultaneously, high temperature drilling could also be resulted in tool wear and broken rapidly, and lead to high process cost。 This study used three Ni-based superalloys such as Mar-M247, Haynes-230 and Inconel-718，applying thermal friction drilling to conduct experiments on the CNC machine using spindle speed and feed rate as process parameters employing Taguchi methods to explore the bush length and internal hole of drilled surface roughness。The results showed that it can generate the longest bush length and best surface roughness for Haynes-230；however Inconel-718 has the largest axial force and worse bush length and surface roughness。
Water Conservancy and Hydropower Engineering Construction System Brittleness Evaluation Based on Choquest Integral
Authors: Zhang Lei , Li Zi Yang
Published: February 2012

Water conservancy and hydropower engineering construction system is a typical multi-level complex system and its swarm identity is apparent to brittleness cumulative effect. The brittle sources are interlinked and associated, thus there are topological forms of different brittle sources, which make the relationship of brittleness evaluation cumulative function to be non-linear. In traditional evaluation methods, indicators are usually assumed to be independent, which does not satisfy the non-linear characteristics of water conservancy and hydropower engineering construction system brittleness. Thus, in this paper, weak monotonic of fuzzy measure is used to replace the addition function, brittleness evaluation model of water conservancy and hydropower engineering construction system based on Choquest integral is built.
Virtual Shaping Design of Beach Bike
Authors: Du Qiu Lei , Jiang Xiao Wei
Published: February 2012

The design of beach bike has a close relationship with a variety of subjects including mechanical engineering, ergonomics and art theories. This paper presents the overall and partial design and the operating process of the design as well. Staggered description of the virtual design is also analyzed to make the subject clear.
Electromagnetic Analysis of Apodized Annular-Aperture Logarithmic Axicons in Wave Imaging Systems
Authors: Yu Yan Zhong , Dou Wen Bin
Published: February 2012

An apodized annular-aperture logarithmic axicon (3ALA) can be applied potentially to improve imaging resolution in quasi-optical and/or millimeter wave imaging systems, due to its property of long depth of field (DOF). Electromagnetic analyses of forward and backward 3ALAs are conducted respectively at mm- and submm-wavebands. Their lateral and axial intensity distributions are evaluated by rigorous electromagnetic analysis method. And the comparative conclusions are drawn at last in our present work
Microstructure and Compound Developed from Ce-As-Fe System at High Temperature
Authors: Dou Sheng Tao , Zhang Jin Zhu , Huang Jun
Published: February 2012

The interaction among Cerium, Arsenic and Iron at high temperature in a pressure-tight reactor were studied by means of electron probe microanalysis, optical microscopy and X-ray diffraction to understand what compounds could be developed and how about their stability chemically should be. The result shows that the binary compound CeAs is the main product on condition that the atomic ratio of Cerium to Arsenic is 2:1. There are some Fe2Ce, Ce4As3 and Fe17Ce2 compounds developed meanwhile. The amount of Fe17Ce2 phase by the base of steel increased with time prolonging at high temperature
A Method of Recognization the States of Phased Array Radars Based on Intelligent Materials
Authors: Quan Wei , Cheng Ji Hang , Song Nuan
Published: February 2012

The aim of this paper is to sorting the phased array radar signal and recognizing the states of PAR. The method is using the beam-scanning characters of the PAR, and then proposes an algorithm based on the rough sets theory to sort the signal of phased array radars. From researching on the characters of the phased array radar’s beam scanning manners, we can use the PDW received from the receiving equipments as a set of attributes. After sorting the signal of PAR, we use the method of FRFT to pick up the same characters in the sorted PAR pulse train. So we can recognize the states of PAR through this method. The experiments showed that this method can get a good result.
Sketch of Implements for Mining Contracts Based on Framework of Software Quality Assurance
Authors: Liu Shu Kun , Yang Xiao Hua , Chen Ji Feng
Published: February 2012

In this paper, the main function of program contract in the software quality assurance is showed combined with the technology of static analyzing and dynamical analyzing. And the meaning of contract is described as well. Daikon and Diduce which are the main tools for detecting the program contract are introduced carefully. Not only the work process of Daikon and Diduce is explicated but also the main characters of them are showed. Combined with the framework of software quality assurance, the main differences between Daikon and Diduce are listed and the theoretical model of detecting contract is expressed in detail.
The H-Infinity Stability of a Class of Lurie Switched Systems with Hybrid Dynamical Systems
Authors: Tian Ya Fang , Mao Bei Xing , Guo Xiao Li
Published: February 2012

The H- infinity stability of Lurie switched systems is investigated. All the subsystems are Lurie systems. Lyapunov functions is used to derive the sufficient conditions for H- infinity stability of systems .
Structure of an Embedded System Software Platform for Plate Recognition System Based on Applied Mechanics
Authors: Sun Xing Wu , Chen Yu , Wang Ai Fei
Published: February 2012

According to the shortcomings of large volume and high cost about the plate recognition system, an embedded plate recognition system is developed based on the ARM11 processor at lower costs. Taking the embedded Linux system as the software development platform, the system uses graphical user interface to operate and control the machine. Using CMOS camera system as image acquisition device, the system adopts HSV algorithm to realize the image classification on the platform of the embedded plate recognition system. The experimental results show that the embedded system runs stably, can realize the plate classification by color, and has the advantages of small size, low power consumption, convenience for using and so on. The embedded system provides a new thought for plate recognition.
Detection Algorithm Research of Face Pose Based on Stereoscopic Vision and Biological Characteristics
Authors: Xu Peng , Zhou Yuan Men
Published: February 2012

The paper introduces a kind of detection method of face pose based on stereoscopic vision technology, approximately divides head’s deflexion into three plane rotations. By calculating the deflexion angle of three directions, you can determine the face’s pose. This method obtains face images by the left and right video channels, first analyses the similarity of double channels’ images to obtain three-dimensional information of face features’ key points. Then calculates three deflexion angles according to these information, therefore can correspondingly adjust and deform the original image to get standard frontal face image, and provides correction image for the latter face recognition. By this method the impact of pose change to face recognition can be reduced obviously in the earlier stage, so the system’s overall recognition accuracy rate is enhanced effectively.
Wangjialing Mine Accident and ChinaCoal Work Safety Risk Early Warning Information
Authors: An Hong Chang
Published: February 2012

This paper illustrates ChinaCoal Work Safety Risk Early Warning Information on the basis of some mine accidents and special Wangjialing mine accident. Structure and functions of ChinaCoal Work Safety Risk Early Warning Information are shown. Weaknesses of ChinaCoal Work Safety Risk Early Warning Information are also pointed out. Some improvement of ChinaCoal Work Safety Risk Early Warning Information is proposed.
Digital V2 Controller for Switching Mode Power Supply
Authors: Yang Zheng Hao , Gao Yan Xia , Niu Yue
Published: February 2012

The research interest of this paper is to explore practical ways of incorporating advantages of digital control in Switching Mode Power Supply (SMPS). The two most important issues are the design and implementation of Digital Pulse-Width Modulation (DPWM) and high-performance digital control algorithms for digital controlled SMPS. A Hybrid DPWM method based on digital clock management (DCM) and digital dithering is adopted to generate high-frequency high-resolution PWM. A digital V2 control algorithm is implemented to improve the system performance. The buck converter is studied to analyze the digital V2 control application in SMPS. The simulation and experimental results are presented.
External Characteristics of Self-Excited Induction Generators under Steady State Operation
Authors: Yang Le Mei , Wu Xin Zhen , Zheng Xiao Qin
Published: February 2012

Based on the equivalent circuit of the self-excited induction generator, an iterative method is proposed to predict the steady state performances by equating the loop impedance to zero. The proposed method is much simpler than Newton-Raphson method and optimization-based method. To facilitate the calculation, a simplified technique for reducing the orders of the equations is used. The fact that the calculated results coincide with those obtained experimentally shows the accuracy and validity of the proposed method. The effects of generator parameters on the external characteristics are studied. The simulation results indicate that the rotor resistance affects both the terminal voltage and frequency. The stator resistance, the stator leakage reactance and the rotor leakage reactance have no significant effect on the frequency
Investigated on Fatigue Properties of Aluminum Ally 7050T7451 with Fastener Holes by Laser Shock Processing
Authors: Jiang Yin Fang , He Xian Cong , Huang Yu , Zhang Jian Wen , Li Zhi Fei
Published: February 2012

Based on the FEM code ABAQUS and MSC.Fatigue, the process of LSP before hole-drilling was adopted to study the residual stress field of aluminum alloy7050T7451 with Fastener Holes after Laser shock processing (LSP), and the fatigue life of the specimens by LSP was analyzed in this paper. The results indicate that multiple laser shock processing can improve the residual compressive stress and fatigue life to a certain degree, and with the increasing number of shot, the strengthening effect gradually decreases. The ratio of the fatigue life of specimens treated by LSP to the fatigue life of untreated specimens is gradually decreased as the mean stress σm increases, and when the σm is 67.3MPa, the fatigue life of specimens treated by LSP advances 719%, compared with that of untreated specimens.
Solution Exchange Method for Synthesis of Sulfur Graphene Composite
Authors: Zheng Ming Sen , Wei Zhi Kai , Dong Quan Feng
Published: February 2012

The Li-S battery system has been intensely concerned for over two decades for its high gravimetric capacity and energy density. Herein, we report a novel sulfur-graphene composite fabricated by solution exchange method with structure of sulfur uniformly dispersed on the graphene surface or filled in layer space of interwoven graphene sheets. The conductive and high specific surface area of single layer graphene sheets affords essential electrical contact to the insulating sulfur. As a result, a reversible capacity up to about 1200mAh/g can be achieved at the current density of 100mA/g and with the increase of current density to 1A/g, the remained capacity can attain 750mAh/g in 80 cycles.
Study on Driver’s Safety Sense Rule Based on Perception Speed at Daytime and Night
Authors: Wu Li Xin , Cheng Guo Zhu
Published: February 2012

In order to ensure traffic safety on freeway, speed limit is necessary. Driver’s safety sense to different speed is not same, so it should be considered by speed limit standard. Through field experiment, the data of driver’s perception speed at daytime and night were obtained. The data at daytime and night were compared. The deviations of perception speed were analyzed under different conditions of driving speed and highway alignment at daytime and night. Driver’s safety senses were classified as four levels of very safe, safe, dangerous and very dangerous. The relation between driver’s safety sense level and perception speed was analyzed. It shows that driver’s perception speed corresponding different safety sense level at daytime and night are also different.
Experimental Study on Mass Transfer Coefficient of Dry Air in Main Cable of Suspension Bridge
Authors: Jia Dai Yong , Sui Lu Yan , He Ming Lai
Published: February 2012

In this study, an experiment platform was built up to determine the key parameter, mass transfer coefficient, of the ventilation and dehumidification process in main cable of suspension bridge. On the basis of experimental studies, an empirical formula of the mass transfer coefficient was obtained, which can greatly contribute to control the content of moisture in the main cable of suspension bridges.
Design Method for Sealing Head of Internal Pressure Vessels in Chemical Industry
Authors: Su Jun , Li Xiao Jing
Published: February 2012

As an important apparatus of pressure vessel, sealing head, has an important role in petroleum industry, chemical industry and atomic energy industry. Sealing head of internal pressure vessels can be divided into three main types, which are convex head, conical needles head, flat head, respectively. Different heads have different calculating method to get the basic parameters and the most design formula of heads are established on the basis of membrane of the stress, and add the stress enhancement factor into the formula for the stress of the edge.therefore. In this study, the author have listed the calculating equations of the typical heads. At last, the author puts forward an example of head calculation to demonstrate the design method
The Application of Information Flow Control Technology Based on Electronic Confidentiality Level Identifier in the Removable Storage Medium
Authors: Qi Long , Xiao Su Mei , Tang Fang Ming
Published: February 2012

With the rapid development of information technology, the electronic information is ubiquitous, which has brought severe challenges to the transmission and reception of classified information. The common electronic information protection technology and measures were described and the primary means of foreign spy and intelligence agencies attack theft were pointed out. Through the introduction of electronic confidentiality level identifier technology and information flow control technology, the security of electronic information was achieve. Take the secret exchange of special U disk of a company in Mianyang as an example, the application of information flow control system based on electronic confidentiality level identifier in the removable storage medium to transmit information was introduced
The Application of Mechanical Failure Diagnosis Expert System for the Improvement of Vibration Fault Monitor and Diagnosis Based on Rough Set Theory
Authors: Qiu Dong , Zhang Jun Ming
Published: February 2012

Focuses on rough set theory and the genetic algorithms and theories on their integration mechanism based on the study of the failure diagnosis on gas turbine-set, A new algorithm were put forward in the discretization of continuous attribute, attribute reduction and value reduction methods based on the classical set theory and rough set theory and solved the difficult problem which expert system to obtain the rules in the paper. Knowledge system attribute table is regard as a major tool to reduce the rules of expert system in which unnecessary attributes are eliminated. The redundancy of failure diagnosis information and the complexity of structure in failure diagnosis expert system are revealed. It brings forth the reliable and practical method, which have further enriched and improved the theories on the vibration fault monitor and diagnosis of a large gas turbine-set by testing and verifying
Outcome-Based Earthquake early Warning
Authors: An Hong Chang
Published: February 2012

Earthquake early warning (EEW) has been popular since 2007, but Wenchuan Earthquake occurred in China in 2008, Haiti Earthquake, Chile Earthquake and Yushu Earthquake occurred respectively in Haiti, Chile and China in 2010, and East Japan Earthquake occurred in Japan in 2011. This paper first illustrates Wenchuan Earthquake, and then introduces successful EEW cases such as Chile Earthquake and East Japan Earthquake and other unsuccessful EEW cases such as Haiti Earthquake and Yushu Earthquake. Furthermore, on the basis of principles of EEW, both outcome-based EEW and comprehensive outcome-based EEW are put forward and some EEW suggestions are given to China according to earthquake and its management in China.