bluuebunny/crossref_metadata_2025 huggingface dataset:
Application of Virtualization Emulator in Network Environment
Authors: Tian An Hong , Fu Cheng Biao , Xiao Hong Mei
Published: September 2013

As network environment is becoming more and more complex, it is difficult for students to understand and master the complex and abstract network concepts. A virtual learning tool named Cisco Packet Tracer has been introduced into the classroom teaching, which provides the virtual configuration environment as real one. This article presents the features of the virtual simulation tool, and the configuration example for mini practice project, which can inspire students creativity. It makes teaching and learning computer network much easier than traditional teaching method.
Design of Receiving Wireless Network for the Application on Recovery of Rocket-Borne Memory
Authors: Tan Qiu Lin , Zhang Xian Sheng , Ding Li Qiong , Hao Kang , Liu Wen Yi
Published: September 2013

This paper presents a rocket recovery system logger program. The equipment mainly used in the recycling system of the missile-borne solid state memory. As the signal transmitter, the Beacon is set under the memory of the rocket, sending GPS information real-time when the memory falls down to the ground. For the ground recovery system, we can dispose the specific location of each node based on the topography by calculating the landing area of the beacon. A beacon transponder is placed on each node and each beacon transponder of the node can better receive signal and transmit it to the control center correctly. Every beacon transponder has only one corresponding MAC address, so the control center can distinguish which one is sending signal. This paper designs the framework of the network nodes and the transmission of the physical model, it also analysis the signal transmission system problems such as the high dynamic Doppler effect, the theoretical analysis and experimental verification. The experiment demonstrates that the network node is a particular promising approach in wireless transmission technologies.
Intensive Management Mode of IT Resources of Enterprise Group Based on Cloud Services
Authors: Zhang Xu Mei , Fan Qiao Ling
Published: September 2013

The informationalization construction is playing an increasingly important role for the development of enterprise group.However, there are problems that enterprise group has to be faced with, like the rapid growth of data, the continuous increase in purchase and maintenance costs of software and hardware equipment, the overlapping allocation of IT resources and so on. To solve these problems, a hierarchical model of intensive management of IT resources of enterprise group based on cloud services was established, and intensive management modes of software, hardware and knowledge of enterprise group were proposed as well.
MMSE Space-Time Multi-User Detection in OFDM Systems Based on a Variety of Modulation
Authors: Qi Meng , Wang Xin Xin
Published: September 2013

MIMO-OFDM is considered as candidates for future 3G/B3G broadband wireless services. High quality mobile services have to eliminate multiple-access interference (MAI) that affects multi-user receiver performance in MIMO-OFDM system. In this paper, we analyze the effect of MAI on MIMO-OFDM system and adapt a successive interference cancellation (SIC) multi-user detection algorithm which based on minimum mean square error (MMSE) algorithm for MIMO-OFDM system. This algorithm by optimizing the sorting structure enables the receiver algorithm has better performance. The simulation results show that the algorithm can obtain rate is better than the conventional linear MMSE algorithm performance in the error, and constellation mapping point spacing also affect the detection performance. As the spacing is reducing, the bit error probability will rise.
Research on Integrated Data Environment for Aviation Equipments Based on Extensive Interactivity of IETMs
Authors: Jiang Wei Wei , Yan Jin , Yin He , Hou Xue Qiao , Zhang Liang
Published: September 2013

As a focus for the current research in the informatization field, Interactive Electronic Technical Manuals (IETMs) involve all kinds of activities relating to equipment support and diversified extensible interactive interfaces. By studying the interaction of IETMs for aviation equipments with other information systems, IETMs functions can be expanded in terms of maintenance aiding, training aiding and technical data management aiding. By creating an integrated data environment framework of IETMs for aviation equipments with Extensible Markup Language (XML) technology, an intermediate mode, the information exchange and sharing can be achieved between different data sources, and the supportability and supporting capability of aviation equipments can be improved.
Kinematics Analysis of Slice Shearing Machine Work Process
Authors: Wei Juan , Shi Wen Pu
Published: September 2013

Geometric analyses and mechanical methods are employed to study the work process of
a slice shearing machine. The coordinate parameters of the key points and the kinematics parameters of the key structure elements are given, and the biting speed expression is also provided. The shearing function feasibility of the machine is discussed. The given results here can provide theoretical references for the shearing machine design and manufacture. The numerical results of the given example show the correctness of the analytical methods and the conclusions.
Study of Reading and Rendering Method for 3DS File Based on DirectX11
Authors: Cui Qing Chun , Li Xing Xin , Hao Jian Ping
Published: September 2013

Based on the analysis of the structure of the 3DS file, this paper uses recursive method to collect content of 3DS file and designs the data structure to save them. Then, reading and drawing principle for 3DS file is studied by DirectX 11. Finally, the system for reading and drawing 3DS file is designed and implemented based on DirectX11 in VS2010, and achieves better results.
Study on Component Management Technology for Apparel Industry Chain Collaborative Work Platform Based on XML
Authors: Yang Li Na , Zhang Ai Mei
Published: September 2013

The system structure of apparel industry chain collaborative work platform demands dynamic and expansibility. Study is made on component management technology, and the correlation model of platform component is established through introduction of relying-on information and information being relied on, so that relevant components can be collaboratively aware of the changes happening on a certain component; component classification and component library management system based on XML are also established. Study on integrated development technology of business components under the platform integration framework is made on this basis, integrated development environment for business components is established, and the above achievements are applied and verified in development of apparel industry chain collaborative work platform.
A Buck Converter Design Based on Sliding Mode Control Strategy
Authors: Gao Yu , Zhou Chu , Zhou Bin , Qu Shao Cheng
Published: September 2013

A sliding mode controller for buck converter based on PWM technology is discussed.Firstly, the schematic diagram of buck converter circuit based on a slidingmode control strategy is designed. Then a sliding mode control approach basedon reaching law is constructed. A circuit model based on MULTISIM is proposed.Finally, the simulation result show that the proposed method can effectively improvethe system dynamic characteristics.
A Modified Adaptive Genetic Algorithm for the Flexible Job-Shop Scheduling Problem
Authors: Pan Ying , Xue Dong Juan , Gao Tian Yi , Zhou Li Bin , Xie Xiao Yu
Published: September 2013

Combined with the stage-related characteristics in solving process of the Flexible Job-shop Scheduling Problem (FJSP) and the evolution characteristics of Genetic Algorithm (GA), a modified Adaptive Genetic Algorithm based on iterative generation and analysis of fitness values distribution is presented in this paper, which has both methods advantages. Instance simulation verifies that the FJSPs own characteristics are utilized in its solution by using the modified AGA, which overcomes traditional GAs limitation that initial stage of evolution is early and random search of medium-late stage is slow. Such methods are verified to accelerate convergence process, enhance searching efficiency and solving precision as well as avoid low efficiency and local optimum.
A Research on the Construction of China's Enterprise Accounting Informationalized Model in the ERP Environment
Authors: Liu Yu Jun
Published: September 2013

Most of the present finance software is designed by simply simulating the traditional accounting format, and automatically inherits its defects. This paper puts forward the defects that exist in the traditional accounting format. It also analyzes the enormous effects ERP environment has on the various aspects of accounting as well as the remarkable differences between the ERP environment and the traditional accounting setting. Finally, it points out that ERP accounting software is supposed to apply the advanced management and accounting concepts of ERP to the innovations of the traditional accounting format instead of simply mimicking the traditional accounting format so as to construct the new enterprise accounting informationalized model in the ERP environment.
Modular Design of Small Marine Aquatic Cutting Machine
Authors: Wu Shu Lei , Zhang Li Zhen , Zhao Yang
Published: September 2013

With the rise of mass customization production, the advantages of modular design are highlighted. Through the selection and combination of modules, different products can be made. It can help to meet the various market demands for the product design. The modular design concept in the small aquatic cutting machine, can enhance product innovation, shorten the design cycle and improve the degree of customization.
Research Progress of Magnesium Hydroxide Flame Retardant from Concentrated Seawater and Brine
Authors: Wu Hai Hong , Luo Bi Jun , Gao Chun Juan , Lu Yong Chao , Zhang Qi , Huang Xi Ping
Published: September 2013

Magnesium hydroxide is an environmental friendly flame retardant with high flame retardancy and low smoke non-toxic characteristics. In this paper, the flame retardant effects of magnesium hydroxide was introduced, the production application and technology experiment of magnesium hydroxide flame retardant was studied. Meanwhile, the development trend of magnesium hydroxide flame retardant prepared from concentrated seawater or brine in China was analyzed.
The Life Cycle of CO2 Emissions of Cellulose Ethanol Research in Tianjin
Authors: Feng Xin , Mao An Qi , Chen Li Ran , Shi Xu Ying , Xie Yu Hong
Published: September 2013

In his paper, we analyzed the cellulosic ethanol lifecycle, and CO2 emissions in straw planting stage, transport stage,production stage and the final dispose stage which based on the 2001-2010 tenyears of straw resources in Tianjin. Thecalculation is that 0.92-1.1 million tons CO2 is discharged in the cellulosicethanol life cycle
Analysis of Water Environmental Quality Using BP Artificial Neural Network in Weihe River Baoji Segment
Authors: Xie Heng Xing
Published: September 2013

The BP artificial neural network model in type 7-5-5 was constructed with the surface water quality standard (GB3838-2002) and the surface water quality items such as BOD5 (5 day biochemical oxygen demand), COD (chemical oxygen demand), permanganate index, fluoride, NH3-N, TP (total phosphorus) and TN (total nitrogen), and the water environmental quality evaluation was conducted using the trained BP artificial neural network with the water contamination concentration data in 6 sections of Weihe river Baoji segment in year 2009. Results showed that the water quality were GradeIand GradeII in Lin Jia Cun section and Sheng Li Qiao section, and Grade III in the rest section (Wo Long Si Bridge, Guo Zhen Bridge, Cai Jia Po Bridge and Chang Xing Bridge).
Simulation of Signalized Intersection Model
Authors: Xue Lian , Xie Qiong Ying
Published: September 2013

Signalized intersection delay is an important evaluation index of the signalized intersection capacity and level of service. This paper presents a signalized intersection delay model for signalized intersection. The model uses time series and queuing theory. It discusses the operation characteristics of the process of arrival and leaving and optimizes the intersection signal timing and gets the best signal cycle time. A scientific model and a more complete analysis are founded in the paper. These methods have a good reference value to the relevant departments.
Research on Task Allocation Model of Materiel Readiness Rate and the Talented Person Growing Law
Authors: Chen Bing , Zhu Xiao Dong , Wang Yi Gang , Ye Fei
Published: September 2013

The army's existing preparation system, maintenance task allocation problem is missing quantitative analysis method, Research on Materiel readiness rate and the talented person growing law of task allocation model, This method has guiding significance for the Army equipment maintenance tasks assigned, At the same time which has important effect on improving the combat effectiveness of our armed forces and cultivate high-quality constructive. finally, test the feasibility of the method with examples.
Research on Supporting Countermeasure of B103W01 Transport Roadway in Shajihai Coal Mine
Authors: Zhao Shu Jiang
Published: September 2013

For the soft rock roadwaysupporting problems, using the conventional methods cannot effectively controlthe deformation and failure. This paper took B103W01 transport gateway projectin Shajihai coal mine as example and analyzed its deformation failure reasonand deformation mechanism and determined the specific measures of transformingcompound mechanism of deformation mechanics into a single type. In the end, weput forward coupling support technology of constant resistance and largedeformation bolt + hollow grouting anchor + corner grouting steel pipe, whichhad been applied to engineering practice. The monitoring results showed thatthe supporting effect was good. So it can be used for reference for the similarconditions of roadway supporting.
Study on Safety Status and Improvement Measures of Ship Construction
Authors: Yu Li Min
Published: September 2013

Overheating investment of private capital in the shipbuilding industry. Many shipyards to appear the low level expansion of investment, innovation ability is low, the renewal of equipment is slow, frequent accidents, restrict the development of the company. Ship safety production and prevent the accident is occurred, excluding all is not conducive to safe, should take the following measures: to gradually improve the safety production management level of enterprises; increase the industry leadership efforts; the establishment of safety production capital; set up the mechanism of safety supervision.
Evaluation and Decision-Making Method for Maintainability Design Based on Fuzzy Preference
Authors: Luo Xu , Yang Yong Min , Ge Zhe Xue , Wen Xi Sen
Published: September 2013

Considering the uncertainty of maintainability design factors and the fuzzy preference information in evaluation values, an evaluation and decision-making method of maintainability was proposed. The linguistic assessment values of maintainability design factors were converted to trapezoid fuzzy numbers by fuzzy set theory, and decision weights under fuzzy preference were given based on maximizing deviation method. Then, evaluation model of maintainability design was established, and confidence index of evaluating decision was given. At last, a case study was given and the result showed that the method is reasonable and effective for maintainability evaluation.
Virtual Operation Strategy and IFOT Model Based on TSMC
Authors: Li Zhe , Hai Feng
Published: September 2013

Virtual Operating is a mode of operation which makes enterprises well adapt to the economic atmosphere of globalization, networking and financial crisis. This paper discussed the typical case of virtual operation strategy through a case from Taiwan semiconductor manufacturer and then built an IFOT model by induction with specific examples. Through this model, this paper focused on empirical research based on TSMC.
Location Choice of China′s ODI: Evidence Based on Panel Data
Authors: Gu Xue Song , Han Li Yan
Published: September 2013

This paper empirically investigates the factors determining Chinas ODI location choice based on 105 host countries panel data over 2004 to 2009. The main contribution is using Chow test to reveal the significant difference in factors determining Chinas ODI towards developed and developing host countries. Chinas ODI demonstrates resource and efficiency seeking in developing countries, while does not exhibit technology seeking in developed countries.
Research of Relationships between Products and Customer Based on Data Mining Technology
Authors: Ye Feng , Li Na
Published: September 2013

In order to meet the customer's individual needs and help enterprises to provide accurate customer service, we created an analysis model of relationships between products and customer based on the theory of data mining theory. In this paper, we put forward four analysis models including "star product selection matrix", "return of goods analysis", "price spread rate analysis" and" product preference analysis" using databases and information technology. Through analysis of the actual retail sales records about the products, services and check leak, we did a quantitative research of relationships between products and customer using the model which we made. It helps the enterprise made a rational sale decisions and got a good economic benefits.
Research on Characteristic of Electromagnetic Force of Magnetic Suspension Device with Large Air-Gap
Authors: Wang Xiao Guang , Liu Qian , Zhang Yi Jing , Chen Hao Hui
Published: September 2013

The electromagnetic force is an important characteristic parameter for magnetic suspension device, and magnetic circuit method is often used to calculate the electromagnetic force in engineering. However, it is not accurate to use magnetic circuit method to calculate electromagnetic force for magnetic suspension devices with large air-gap. In this paper three kinds of methods are used to study on the characteristic of electromagnetic force of magnetic suspension device with large air-gap: experimental, ANSYS calculation and magnetic circuit calculation method. Investigate the property and the variation regular pattern of electromagnetic force. Analyze the error distribution of magnetic circuit calculation method and find out the causes of errors, and then deduce a modified magnetic circuit formula to calculate the electromagnetic force of magnetic suspension device with large air-gap.
An Exploration on the Innovation Methods of the Printing and Packaging Machinery Based on Simulation
Authors: Gao Bo , Zhang Xiao Gui , Cai Ji Fei
Published: September 2013

Printing and packaging machinery have complex technology motion. The mechanism is composed of different basic mechanism. The mechanism design is an important stage in Innovation Design of Printing and Packaging Machine. The mechanics design applying Solideworks three dimensions design software and Matlab Simulation was introduced; in the design stage, assemble interference and interference detection of the mechanics were made by Solideworks Visible model; on the basis, the analysis on the kinematics and dynamics of machinery by Matlab Simulation were done. The application example shows the Solideworks three dimensions design and Matlab Simulation is a perfect design method.
Sensibility Analysis and Structural Optimization Design of Vehicle Frame
Authors: Deng Xiao Lin
Published: September 2013

The paper establishes a three-dimensional solid model of the frame, and simplifies the frame model according to the simplification rules of finite element. Use Pro/MECHANICA module of Pro/ENGINEER software to carry out static and modal analysis of the frame, and to conduct sensitivity analysis of geometric parameters having a great impact on the frame characteristics, thus the most sensitive size parameters of the frame performance are gotten. By optimization design function of Pro/MECHANICA module, specifying goals of optimized design and ranges of size sensitive parameters, the frame structure is optimized.
Study of the Suitability between Artificial Cavity and Traffic Vessel
Authors: Li Ji Sheng , Dong Wen Cai , Ou Yong Peng
Published: September 2013

The use of air cavities beneath ship hulls can lead to significant drag reduction. A study of air-ventilated cavities under a traffic vessel with flat bottom has been undertaken based on solving the RANS equations and VOF multiphase model. Macroscopic features in the air-cavity flow are predicted. Why the existing cavity form leads to unsatisfactory results on the traffic vessel is analyzed. The influence of parameters of artificial cavity on air cavity patterns is parametrically studied. Suggestions on improving cavity parameters and a new cavity form that can obtain stable air cavity are given, which may provide reference for the design of air cavity traffic vessels.
Study the Distance and Flow Direction Effect on Air Control between Two Air Curtains
Authors: Zhong Chen Hua , Zhu Xiao Jun , Liu Wen Si , Yang Zhi Qing
Published: September 2013

Two air jet curtains can enhance the ability of tunnel air control, but the interactional influence between two jet bring side-effect at the same time, this side effect changes with jet flow, space size, which may harm the ability of tunnel air control in disadvantage situation. This article use FDS to simulate flow pattern of two air jet in different situation, get stability condition and air control ability in different jet situation which can provide guidance for air jet, air control engineering.
Tennis Transmitter Design and Parameter Optimization
Authors: Gong Xiang Hui
Published: September 2013

Design of tennis transmitter design parameters, structure design, choice of institution, etc., the transmitter in accordance with the standards of the international tennis federation (ITF) to carry on the design. Design and institutional selection includes the realization of the crank connecting rod mechanism and control motor sports, ball tray and ball under the control of the speed of tennis, crowded ball wheel speed regulating motor selection, crowded round ball structure design and checking calculation, the design and checking calculation of shaft, casing and bracket material design and the selection, selection of walking wheel, etc.
The Testing Data Analysis and Research from Disturbances by Conduction and Coupling of Beidou Navigational Terminal
Authors: Li Zheng Guo , Chen Xuan , Zhang Kai
Published: September 2013

Aiming at the status quo of Beidou navigational system used in automobile, this paper puts forward a testing project based on ISO7637-1,2,3 standard road vehicles-electric disturbances by conduction and coupling, and tests the provided specimen at first. Then during the test process, according to the different requirement of specimen performance, refer to the reference standard, the testing pulse parameters are set. At last, according as the collected data and information, result of testing is analyzed and researched, and protected circuit, filtering circuit and power supply input circuit are designed to the problems of specimen. The analysis of testing result denotes that the EMS design of Beidou navigational terminal has some abilities, the report of testing result analysis has great modeled behaviors in standard establishment and product popularization of Beidou navigational terminal.
Analysis on Heat-Insulating Property of the New-Type Water Transporting Vehicle Based on ANSYS
Authors: Xu Cong Qi , Jia Gui Zhi , Gao Rui Lin , Ma Xi Bin , Wang Xian
Published: September 2013

A new-type heat-insulating water transporting vehicle is designed to solve the problem that water transported in cold area is apt to be frozen. The vehicle shall be actively heated and passively heat-insulated with fuel oil heater and polyurethane insulation layer. Furthermore, it also can be automatically heated with the special management system by controlling the heater according to the water temperature and the ambient temperature. In order to study on the heat-insulation property of the vehicle, the temperature distribution of the water in the tank and heat losses from the tank with ANSYS; finally, the low temperature environmental test is carried out. The test result shows that the water temperature in the tank is reduced from 20°C to 19°C for 24h under ambient temperature of -25°C, the average overall heat transferring coefficient is 0.52W/(m2•K) and thus completely meets requirements for water transporting in cold areas.
Design of Ultrasonic De-Burring Machine for Soft Magnetic Ferrite
Authors: Qi Wen Ting , Zheng Hui Feng , Wang Cheng , Ma Hai Shan
Published: September 2013

In order to remove burrs of soft magnetic ferrite precisely and efficiently, the stand type ultrasonic de-burring machine was designed based on the theory that the ultrasonic wave can produce acceleration. Firstly, the whole plan proposal of the new design was presented. Then the ultrasonic vibrating system, controlling system, the 3D mobile platform were respectively designed in detail. Finally, the design process was verified correctly by the de-burring experiment results.
Reliability Analysis of a Track Vehicle Gearbox under Mixed Operating Condition
Authors: Mou Peng Bo , Tao Feng He , Jia Chang Zhi , Ma Wan Li
Published: September 2013

The Copula theory was applied when the reliability in mechanical transmission was difficult to be predicted, the reliability model between gears had been established, the dynamic relationships of mile, relevant parameter and reliability had been established. The model was applied to verify between two gears in transmission of the self-propelled gun, compared with the real situation, the model could provide reference for life and reliability prediction of complex drive system.
The Research of Demulsifiers's Influence on Oil Emulsion's Rheological Property
Authors: Cui Wei Lin , Li Shi Xu , Song Ling Jian , Li Yong Sheng
Published: September 2013

Abstract: During the transportation of the oil which is replaced from stratum by return water with demulsifier, the rheology of the water cut oil must have been affected. In order to study the influence rule of emulsion which contains hydrophilic demulsifier, we don this experiment which tests the different demulsifier using HAAKE Viscotester 550. The testing result showed that for crude oil emulsion, the effects of the factors on the rheological index and demulsifier evaluation index into corresponding relation, this provides the rheological field development significance; Demulsifier could move forward the emulsification diversion point, and the viscosity of the emulsion decreased effectively with different moisture contents. Different structure types of demulsifier have the different influence on viscosity. Finally, we conclude the influence rule of emulsion which provides the daterbase for crude oil heating airtight gathering and transportation technology .
Squeeze Oil-Film Fluid-Structure Interaction Analysis by the Finite Element Method
Authors: Chen Jie , Xi Neng , Yang Jia Jun , Zhao Mei Ling
Published: September 2013

The squeeze oil-film dampers have been applied to damp out vibration in linear guideway systems of CNC machine tools. An accurate estimate of squeeze oil-film damping effects is significant to predict the dynamic performance of rolling guidance systems. This paper presents a finite element method to solve the fluid-structure interaction problem of squeeze oil-film dampers. Three-node Mindlin plate element is used in the structure domain model. The oil-film behavior is provided by the Reynolds equation of lubrication theory. Both the structural domain and fluid domains are discretized by finite element method. The frequency response functions of coupled systems are derived by considering the oil-film pressures and the structure displacements on the boundary as the coupling conditions. The validity of the frequency response functions is verified by a simple example. It shows that the oil-film thickness has significant influence on the frequency response.
Analysis of Helicopter Engine Crankshaft Torsional Vibration Based on ADAMS
Authors: Huang Kang , Wang Kai Lai
Published: September 2013

To address the problem of helicopter engine crankshaft fracture in engineer, this paper carried out an analysis of an inline four-cylinder engine torsional vibration, applying virtual prototyping technology based on ADAMS. According to this analysis, draw several orders of crankshaft torsional vibration natural frequency and the main vibration modes. This paper carried out a harmonic analysis of the disturbing torque acting on the crankshaft and torsional vibration amplitude of the free end relative to the flywheel, and obtained Critical speed map of crankshaft torsional vibration. These results can offer theoretical basis for engine optimization design.
Design of LED Light Source for Uniform Illumination in Large Area
Authors: Sun Jie , Zhang Jing Wen
Published: September 2013

Based on the observation of the data measured, the illumination distribution of single LED is set to follow Gaussian function, and with this hypothesis, two forms of light array are analyzed on their illumination distribution. The law of Spyro is used to optimize space between LED in array. Comparison and analysis of the two kinds of array arrangement are given for getting the uniform illumination. The general design method and the calculation example of LED array to produce uniform illumination are also given in this paper. Keywords: Plane light source, Gauss function fitting, LED light source, Uniform illumination
Parallel Resonant Power Supply Based on Chip UC3863
Authors: Jiang Nian Ping , Ma Zhi Jie , Yin Peng Hong
Published: September 2013

This paper analyses the characteristics of parallel LLC resonant converter, and makes the comparison of the characteristics of the order switch shunt and staggered parallel switch circumstances converter. The circuit uses UC3863 chip as the core control chip switch power supply, circuit adopts the half bridge structure. This model is seldom put forward through the experiments prove the feasibility and practicability of the LLC, and greatly improving the working efficiency. Using SABER simulation software for the converter circuit simulation and analysis with the theoretical calculation of the device parameters. Example of 300v voltage input, 12-18v output voltage, 2.5 KW, 500 KHZ parallel LLC resonant converter design and simulation for model analysis. Sum up the advantages of the parallel LLC resonant converter compared with the traditional LLC resonant converter .The results of simulation verify the feasibility of the design and the accuracy of the conclusion.
Redesign and Optimization of Structure Using Special Shaped Connection
Authors: Liu Li , Li Wen Jiang , Liu Tao , Li Ren Jun , Jia Wen You
Published: September 2013

In this paper, a method of using special shaped connection is proposed to redesign and optimize connection structure for improving manufacturing processing, enhancing equipment flexibility, and reducing parts costs on the basic of satisfying mechanical reliability. First, requirements of redesign and optimization process are addressed. Then an applied case is presented: 4-polygon shaped connection replacing involute spline connection in driving system. The result shows that the redesign and optimum structural demonstrate significantly the effectiveness.
Study on Cloud Design Mode and Key Technology for Emergency Equipment
Authors: Chen Jun , Guo Gang , Zuo Yong Gang
Published: September 2013

In order to carry out rapid response of design of products, aimed at problems existed in realm cooperation and temporary order during the design process of emergency equipment, this paper proposes design mode of emergency equipment based on cloud environment, implementation method of cloudy domain analysis on design demand and mapping technology, serial expand strategy on discrete design resource and strategy integrated design task with resource in time, it can implement reasonable allocation and delivery in design the task resource demand domain DR the state control domain T and feasible resource domain R. Correctness and feasibility of model and method is analyzed and verified with examples.
Visual Fatigue Caused by Tablet PC Based on Critical Fusion Frequency and Eye Blink Frequency
Authors: Chen Cheng Ming , Wang Hui , Tang Yong , Zhang Xun
Published: September 2013

The objective of the study is to evaluate visual fatigue induced by different tablet PCs (LCD/OLED) by measuring CFF (critical fusion frequency), BF (eye blink frequency) and (SR) subjective rating. Twelve healthy subjects (10 males and 2 females) participated in the study in a controlled simulated living environment with a 18-23°C temperature, 30-45% relative humidity and 150lx illuminance. The experiment was carried out about 50 minutes, including: 30 minutes watching task (EOG test) and 20 minutes test (including subjective questionnaire and CFF test before and after the experiment). The experiment design included dependent variables: CFF, BF and subjective rating (SR); and two independent variables: Tablet PC types, watching times. As a result, after the experiment, the decline range of CFF of LCD was lower significant than that of OLED (p<0.001); the decline range of BF of LCD was higher than that of OLED (p<0.01). Also, subjective rating indicated a consistent result that higher visual fatigue was founded after watching LCD. As a whole, watching LCD tablet PC caused higher visual fatigue than watching OLED tablet PC in general.
Absorption and Emission Properties of Bismuth-Doped Silicate Glass
Authors: Xu Bing , Xu Xiang Jun , Dai Hou Mei , Deng Zhen Wei , Lv Xiang Qun
Published: September 2013

Single Bi-doped and M/Bi co-doped silicate glass (M=Al, Y, La) were prepared and broadband NIR emission were observed when the glass samples were pumped by 514 nm and 808 nm LD, respectively. The absorption intensity and emission intensity of the Y/Bi co-doped glass and La/Bi co-doped glass decrease obviously compared to single Bi-doped glass. The absorption intensity in the region of 600-1100 nm and the NIR emission intensity pumped by an 808 nm LD were remarkably enhanced by the introduction of Al2O3 into the Bi-doped silicate glass. It is suggested that the Al/Bi co-doped silicate glass might be very useful for broadband fiber amplifiers and widely tunable lasers.
Effect of Hydrogen on Size of Cu-Ag Alloy Nanopowders
Authors: Zou Min Ming , Tian Kai Wen , Zhao Hong Yan , Huang Wei , Liu Yong , Shang Fu Jun , Shi Hong Gang
Published: September 2013

Cu-30wt%Ag alloy nanopowders were prepared by induction plasma system, and the effect of hydrogen content in plasma atmosphere on morphology and size distribution of nanopowders was studied. The results show that with the increase of hydrogen content, the size of the prepared Cu-30wt%Ag alloy nanopowders is refined from 213 nm to 151 nm and then to 117 nm, however, there is no obvious effect on the morphology of nanopowders. The variation of nanopowders size should be attributed to the introduction of hydrogen, which leads to the change of energy coupling degree between starting powder and induction plasma.
Effect of Matrix Properties on Shear Stress in Composite Reinforced with W Fiber under Loading
Authors: Zhu Li Jun , Tian Kai Wen , Shi Wen Lu , Yang Chao , Wang Zhen Ming , Shi Hong Gang
Published: September 2013

The effect of yield strength and elastic modulus of matrix on shear stress in two phases of composite reinforced with W fiber under pulse loading was simulated by ANSYS software. The results show that the effect of mechanical properties of matrix on composite should be taken into consideration in designing composite. The matrix with high yield strength and low elastic modulus can reduce the shear stress in W fiber, and is beneficial to keeping the integrity of W fiber during penetration, thus resulting in the improvement of penetration capacity.
Finite Element Analysis of Zirconate Titanate Ceramics Piezoelectric Effect
Authors: Qiao Xiang Xin , Yu Feng , Liu Zhi He
Published: September 2013

The ceramic material of lead zirconate titanate has positive piezoelectric effect; Its mechanical energy can be converted to electrical energy. Finite element model is established for piezoelectric ceramic material, in addition that the transition between force and electric is simulated numerically by the analysis function of force-electric coupling field of ANSYS. We obtain the relationship between output voltage and external force, besides the relationship between different heights and the output voltage within the piezoelectric model. It indicates that pressure is proportional to the output voltage value, and it verifies the correctness of theoretical analysis. These provide a reference for the project application of piezoelectric materials.
Preparation of Ferrocene Functionalized Multiwall Carbon Nanotube Nanocomposites and its Electrochemical Behavior
Authors: Ren Qun Xiang , Chi Tian Hao , Sun Ying Ying , Feng Li , Ma Ming Yang
Published: September 2013

Ferrocenecarboxaldehyde (FcCHO) was covalently bound onto the multi-wall carbon nanotubes functionalized with amino groups (AMWNTs) to achieve Fc-AMWNTs conjugate. The cyclic voltammetry were used to characterize the nanocomposites. Here, Fc-AMWNTs were applied to construct glucose biosensors with IO4--oxidized glucose oxidase (IO4--oxidized GOx) through the covalent assembly method without any cross-linker. The presence of both ferrocene as mediator of electron transfer and MWNTs as conductor enhanced greatly the electrocatalytic response toward the glucose. Furthermore, our enzyme electrodes also showed remarkable stability due to the covalent interaction between the Fc-AMWNTs and the GOx.
Preparation of High-Elasticity and High-Modulus Tennis Rubber
Authors: Shi Bo Qiang , Cai Yun Tao
Published: September 2013

High-elasticity and high-modulus tennis rubber was manufactured mainly from NR and trans-1, 4-polyisoprene. The optimizing formula of rubber is: NR 82, TPI 18, Silica White 25, ZnO 10, Stearic Acid 1.5, Magnesium Carbonate 10, Antioxidant 1.5, Coupling Agent Si-693, Sulfur 4.5, Accelerator DM0.7, Accelerator D0.5. The tennis made of such optimized rubber can satisfy the industry standards.
Based on Abaqus of Simulating and Analyzing the Incremental Forming Method of Water Jet
Authors: Zhang Ling Yun , Li Dong Hui
Published: September 2013

With the rapid development and widespread use of water jet technology, the water jet forming method is also got attention by the manufacturing industry. Its advantage is no need for manufacturing the mold and forming directly, applies to small batch production. This paper is mainly study the finite element simulation of water jet forming method. The essential factor of water jet forming process simulation is to simplify the mold in reasonable mechanics method. Compared with existing experimental data to verify the accuracy of the model, and analyze the characteristics of the water jet forming.
Research on the Influence of Reinforced Rib Thin-Walled Casing Structure Stiffness
Authors: Tian Jing , Wu Wei , Ai Yan Ting
Published: September 2013

Reinforced rib is used to strengthen the rigidity of thin-walled casing structure , inhibit the vibration of the structure effectively. In this paper, Finite Element Method is used to simulate the typical reinforced rib thin-walled casing structure. Changing the reinforced rib positions and geometric parameters such as sizes, then calculate the stiffness to weight ratio and dynamic response, at the same time ,make a comparison. The result shows that: The thin-walled case with reinforced rib, the tensile stiffness and bending stiffness were increased, but the stiffness to weight ratio is presented in different geometric parameters shows differents; Under the different frequencies of excitation force load, because of the reinforced rib, the thin-walled casing structures harmonic amplitude decreases when they are under the same frequency .The result will provide reference for later thin-walled case with reinforced rib structure design.
Research on the Thermodynamics and Kinetics of Chromium Ore Smelting Reduction Process for Producing Stainless Steel
Authors: Liu Yan , Jiang Mao Fa , Wang De Yong
Published: September 2013

For describing and resolving the process of chromium ore smelting reduction preferably, the research status on the thermodynamics and kinetics of chromium ore smelting reduction process was summarized, based on the introduction of the process for smelting stainless steel with hot metal in a converter. The existing problems for smelting stainless steel by chromium ore smelting reduction in a converter were also discussed and some suggestions were made for the future work. A lot of investigations about the thermodynamics and the reduction mechanisms of chromium ore have been done. However, the consistent view about the thermodynamic feasibility and the mechanism of smelting reduction has not been achieved, so the application of research results is limited. Little work about the reaction kinetic model for the production of stainless steel by chromium ore smelting reduction and direct alloying has been done. So the synthetic kinetic model including a dissolution model and a reduction model of chromium ore should be built to predict and control accurately the process.
Study on Carbon Fiber Composite Materials Cutting Tools
Authors: Wu Ming Yang , Tong Mu Lin , Wang Yi Wen , Ji Wei , Wang Yu
Published: September 2013

With the carbon fiber reinforced plastic(CFRP) materials more and more widely being used in aviation, aerospace and other industries, the study of the secondary processing technology of composite materials is paid attention by scholars from home and abroad. Because the composite materials has characteristics such as high hardness, high strength, light weight, anisotropic and etc, it is easy to produce hierarchical, tearing, burrs, drawing, the collapse of block and other defects in the machining process, so it belongs to a typical difficult-to-machine materials. Firstly the type and characteristics of carbon fiber composite materials were analyzed. Basing on the basic principles of composite material machining the carbon fiber composite machining defects were analyzed, and the design and optimization suggestions of the carbon fiber composite cutting tool were put forward according to its machining characteristics. The tool solutions of the drilling problems of carbon fiber composites in different areas currently facing were explored. Under the basis of theoretical research and analysis, a new type of PCD tool was designed and developed and through comparing test the optimal edge was got. Through experimental research the tool geometry parameters and cutting parameters which were suitable for machining were analyzed, and the tool life problems were analyzed too. All these laid a foundation to realize carbon fiber composite materials cutting of high efficiency and high quality.
Synthesis of Al2O3-TiB2 Composite Powder by Planetary Milling from Al-TiO2-B2O3-Ni Mixture
Authors: Yang Wei , Dong Shi Jie , Yangli An Zhuo , Xie Zhi Xiong
Published: September 2013

Titanium diboride (TiB2), which is characterized by a high melting potin,high stiffness, good wear resistance, has good structural and thermodynamiccompatibility with Al2O3. In this paper, Al2O3-TiB2 composite ceramics wereeffectively synthesized by mechanical alloying(MA), planetary ball milling of 26.25wt.% B2O3, 30 wt.% TiO2, 33.75 wt.% Al and 10 wt.% Ni. The phase transformationafter different milling time was conducted by X-ray diffractometry(XRD). The XRDanalyses exhibited that the Al2O3-TiB2 composite was formed after 12h milling time(BPR:10/1 and rotational speed of vial: 500 rpm). The results indicate that increasingmilling time up to 60 h had no significant effect other than refining the crystallite size.
The Resonant Modes in One-Dimensional Photonic Crystal Parallel Quantum Wells Composed of Negative Index Materials
Authors: Xiao Xu Yang , Chen Run Ping , Cheng Zheng Fu
Published: September 2013

We propose the one-dimensional photonic crystal quantum well structure composed of two negative metamaterials, the features of which are investigated with scattering matrix method. With this method, the transmittance, reflectance and dispersion relation of electromagnetic wave propagation in photonic crystal are obtained. Moreover, the photonic band structure is given by dispersion relation. For photonic crystal parallel wells the sandwich structure (MpNqMp) and four PCs structure (MpNqMpNq), the resonant modes exist in the photonic band gaps. The number of resonant modes is varied by changing the period number of the constituent photonic crystals. Meanwhile, the resonant modes is not sensitive to the incident angle increasing, only shift slowly to lower frequency region. Moreover, the resonant modes can be act as multiple ultra-narrow bandwidth filters.
Preparation and Characterization of Al2O3 Nanoparticles with Dodecyl Trimethyl Ammonium Bromide as Surfactant
Authors: Wang Min , Dan Wei Yi , Li Jian Fen , Ding Jie Feng , Zhou Guo Qing , Wang Qiang Sheng
Published: September 2013

nanoAl2O3 has been synthesized by homogeneous precipitation method using dodecyl trimethyl ammonium bromide (DTAB) as surfactant. The as-prepared powder was characterized by FT-IR, XRD, TEM and SEM. The results indicate the surfactant existence in the precursors but disappeared in the products. This is mainly due to the combination of precursor and surfactant, which results in particles of nanosize. The nucleation and growth rate during the precipitation has also been controlled by the addition of surfactant. During the calcination process, the surfactant has decomposed and volatilized into air. The XRD characterization shows the calcined powders were γ-Al2O3 particles with mean size of 27 nm, which was in accordance with TEM characterization. The morphology of the prepared alumina particles has also been investigated by SEM and showed that the powder has a spherical morphology with a uniform particle size.
Study of Magnetic Fields of Magnetron Sputtering Affecting CrN Films
Authors: Jean Ming Der , Sheen Maw Tyan , Wu Ching Fu , Chen Feng Ming , Lee San Jen
Published: September 2013

This article presents the distribution of the varying magnetic field and its effect by magnetron sputtering on mechanical properties of CrN films. The magnetic field variations in the sputtering processes were explored, and the strength of magnetic field in the unbalanced magnetic sputtering systems is controlled. In addition, the microstructure, composition and surface properties of CrN films prepared by magnetron sputtering were investigated. At a GDMT of 27mm, the highest wear rate value and hardness values seems to be appeared, while the higher critical force value appears to occur at 49mm GDMT during 18 tests. The experimental results have showed that in the enhancement in overall intensity at the gap distance of 27mm between magnet set and the target surface (GDMT), magnetic field strength varied having a significant influence on the CrN structures was readily noticeable, while the wear scar curve at 49mm GDMT possessed better tribological properties than those of the others. Thus, magnetic field variations play a crucial role in determining the properties of the films