bluuebunny/crossref_metadata_2025 huggingface dataset:
Study on Desert Ecological Resources in Green Environment
Authors: Li Zhao Yang , Bai Hui Fang , Shi Jin Lian
Published: January 2014

Desert ecological tourism resources in green environment are an integration of desert natural geographic and landform landscape with its interdependent desert ecosystem environment, possess two major functions, and also their values are reflected in ecological benefit and recreation value. Therefore, through choosing ecological tourism as an index and combining EM inside direct cost and outside direct cost with grading evaluation, the intension of the recreation value of desert tourism resources in green environment was defined according to the ecological tourism function of desert tourism resources; through investigation and research, classification, data collection and regression processing, the recreation value of China's desert tourism resources was calculated, and the result showed that the recreation value of China's desert tourism resources in green environment reached 4.5 billion RMB in 2010.
Analysis on Fission-Style Communication Mode of Mobile TV
Authors: Huang Yong Jun
Published: January 2014

This article expounds and discusses the definition and features of fission-style communication systematically and profoundly. By demonstrating the relationship between mobile TV and fission-style communication, it comes to the conclusion that, for fission-style communication, mobile TV is a natural and the most important medium as well as a medium that is best fitted for media evolution theory. At the end of this article, the approaches and measures to establish mobile TV platforms by employing fission-style communication are discussed.
Study of FIDIC Condition in Innovative Engineering Environment
Authors: Liu Zhao Hui
Published: January 2014

The FIDIC Condition has been widely applied in the international engineering. The practice applying in foreign-invested projects in China indicates it can speed up the process of standardization of construction project management and improve the level of construction project management. However, because of constraints of various factors, the application of the FIDIC Conditions is limited in China. This paper describes the questions of application and the measures to be taken currently.
Study on Innovative Engineering of Energy Industry
Authors: Liu Jin Song
Published: January 2014

At the beginning ,this paper analyses the current situation on chinas energy enterprises going out ;Then this article generalize the going out modes into three kinds, that is the protocol mode on exploit and services, the mode of mergers and acquisitions and the mode of resource bidding. By using TOWS Matrix method, this paper analyses these modes respectively. Finally, this article put forward the path to choose the better mode for Chinas energy enterprises.
Study on Smart Materials of Library Buildings
Authors: Su Xue Mei , He Gui Xin
Published: January 2014

With the human society stepping into modern civilized information age, libraries which are continuously profound in their modernization, respect readers first, in order to meet humans demand, realize their value and pursuit their development which has become the goal to libraries for their development and value achievement. Gradually the concept of people-oriented is increasingly blended in library construction, document information service, business workflow and personnel management work. In the library construction work, it is significant to embody the humanistic care in the smart materials of library buildings and concern about the different reader groups physical and psychological requirements.
Study on the Efficient Design Scheme of Intelligent Building
Authors: He Jing
Published: January 2014

As the global economy continues to grow, the resource consumption and environmental effects of the building and its running are growing. It is our common task to reduce building energy consumption and pollution emissions, to conserve resources, to protect the environment and achieve the harmonious coexistence of architecture and nature. And China, as a developing country, is facing with the heavy tasks to develop economy and improve peoples livelihood, at the same time, also facing with the challenges of resource and environmental constraints. Building energy conservation will be a long and arduous historical task, also an important and urgent realistic work. Currently, China is undergoing the worlds largest urban construction, while the building energy efficiency is the key area of energy conservation. Promoting the development of intelligent and green building is an important measure to implement the concept of the scientific development and to build a resource-saving and friendly society. Strengthening the international green building cooperation and exchanges will promote building energy efficiency to play a positive role.
Construction Technical Measures and Control of Concrete Temperature Cracking for a Mass Flat Plate Type Raft Foundation
Authors: Yu Jing Liang , Yang Dong
Published: January 2014

The mass flat raft foundation Section is large and Cement is in large quantities, the temperature changes in the larger cement hydration heat of the water releasing, the temperature stress is main reason reducing cracking. According to the basement of a project of Guangzhou large slab raft foundation engineering as an example, Discussing the construction technology measures of early crack of large volume concrete of raft plate in the process of construction,. The results show that it Can effectively prevents the slab foundation structure cracking and achieves good results through controlling Concrete materials and concrete temperature Parameter such as the lifting machine temperature and the pouring temperature and the expansion joint or the whole pouring length.
Study on River Landscape Ecological Restoration Project
Authors: Fu Fei
Published: January 2014

In the process of urbanization, along with industrial development and population growth, demand of water is rapidly increasing, causing water shortages. Some rivers, lakes, wetlands and other water bodies are invaded, as well as the demise of the transformation has been a serious threat to the survival and development of human society. Therefore, river restoration is one of the hot researches in recent years. In this paper, the author made a preliminary summary on river restoration and repair, technology and related engineering examples in order to promote domestic demand for river restoration longitudinal in-depth study and try to raise the domestic ecological restoration in future research directions: River ecological restoration is a long process. The design process should be integrated into the concept of sustainable development and build a public participation platform integrated with experts, designers, and user. And river restoration technology and related engineering examples literature play the role of reference and guidance on the selection of the river restoration project technical measures.
Study of Computer Network Resource Sharing for Advanced Engineering Applications
Authors: Li Ning
Published: January 2014

Resource sharing is based on network resource sharing, in which many Internet enthusiasts share the information collected by themselves with the world through some platforms for not pursuing any interests. Along with the wide application of computer network in the groups of users, a good communication platform between the Internet and users has begun to be produced, and also network resources gradually trend to the development of resources sharing, but are no longer simply enjoyed by a certain user. To analyze and further know the advantages of computer network resource sharing, it is necessary to combine with their actual application conditions. This is analyzed in this paper.
Geometric Subdivision Based on the Mosaic View Related PN-Patch for Multifunctional Materials
Authors: Qin Hai Ning
Published: January 2014

To the problem of memory consumption caused by the method based on GPU geometric segments, this paper used the new features of DX11 inlaid the PN-Patch geometric segmentation to resolve. Mixed triangular and quadrilateral mesh, combined with displacement maps and normal maps to get rich surface details with reasonable viewpoint mosaic factor calculation method.
Test Paper Materials Auto-Generation System
Authors: Lu Xiao Bo , Hao La Zhu , Yan Li Fang
Published: January 2014

Nowadays, the computer is increasingly popular, and college examination is developing in the direction of traditional examination means to automation and intelligence ones gradually, all these make it inevitable to construct question bank for courses, and to generate test paper using computers. This paper uses the Delphi technique, to make improvements to existing components, combining with VBA programming, and use of SQL Server to implement the question bank management and test paper auto-generation system, which could generate test paper in Word Document. A large number of tests show that the software is running stably and system features are functioning correctly on Windows 2000/XP/2003 platform with Office XP/2003 environment.
Source Address Validation Improvements in Construction of Campus Network
Authors: Zhu Zhi Yu , Xu Xiang Yang
Published: January 2014

As a key technology in the RFC 5210 framework, Source Address Validation Improvements (SAVI) provides an effective solution to perform accurate source address validation. In this paper we present a detailed analysis of the application of SAVI in building campus network. Our work provides valuable insights into the generation of low-risk and trustworthy campus network.
Study on Security of Information Exchange of SOA Application System
Authors: Gao Feng , Li Li
Published: January 2014

Service-oriented architecture (SOA) is a design idea under which we can cover all aspects of the business service in life cycle including the creation and usage of the service. SOA also provides IT infrastructure. It can make the different services exchange data or work is a business process. Implementing the objectives can completely cross operating system platform and cross programming language platform. The objective of the paper is to propose a security service agent based on SOA. The service agent not only can protect the information exchange of network services, but also can realize on different development platforms.
H. 264 Video Compression Coding in Emergency Management
Authors: Li Guo Liang , Wang Yan
Published: January 2014

The increasing ability of emergency management practices is highly dependent on information technology; this paper introduces the video conferencing system for emergency management practice has various advantages. For the current video coding in a large number of technical standards for network messaging limitations, this paper analyzes H.264 video compression coding unique advantages and technical standards. Based on our current status of the emergency information network construction, it proposed in H.264 video coding standard video conferencing systems to improve and enhance the government's ability to respond to emergency management.
Research on Heterogeneous Network Data Communication
Authors: Shen Yang
Published: January 2014

With the continuous development of network applications, the new network structure emerging. To solve the interconnection of heterogeneous computer networks is essential, real-time network traffic is the current focus of the study of computer network. Articles focus on these two aspects of the problem and put forward a thought of heterogeneous network with the structure, in the network-level and application-level implementation of a heterogeneous network interfaces isomorphism. We discusses the implementation of real-time communication network principle and method based on the client / server model, gives a heterogeneous network to solve the problem of real-time communication process model, programs and implementation framework.
Research of Logistics Information System Based on GPS
Authors: Fang Dan Yu
Published: January 2014

The study of the logistics system mode based on the city construction is mainly according to the concrete characteristics of the logistics operation, to sum up the characteristics of the logistics system in the area of the set of the logistics information system, which aims to design a reasonable response model framework of the logistics system. This research is mainly based on the research on the GPS system, and deepening the logistics information system is to design and construct the function combination of the countermeasures of the logistics information technology, which is to design a complete system framework of the working state. In addition to the related GIS technology, and the implementation of the monitoring and the control of the logistics information system, and the implementation of the navigation guidance in a reasonable range, provide the reference for the construction plan of the whole system, which lays a theoretical foundation for the healthy and effective operation of the countermeasures of the logistics information technology.
Cultural Tourism Resources Database Based on MapGIS
Authors: Feng An Feng , Wang Yan Hua
Published: January 2014

Using the method of establishing land resources geographic database, combined with the actual situation of cultural tourism resources of Mt. Lu scenic area, this paper explored the construction of Mt. Lu Cultural Tourism Resources Geographic Database based on MapGIS. Describes the method and process of the construction of Mount Lu Cultural Tourism Resources Geographic Database Based on MapGIS according to the characteristic of MapGIS, and discussed its application value.
Experimental Study on Asphalt Composite UV Absorption Anti-Aging Agent
Authors: Zhang Wen Gang , Wang Fang
Published: January 2014

In order to compound high performance asphalt UV absorption anti-aging agent, light screener, antioxidant, light stabilizer were used in experiment, ultraviolet rays aging equation of asphalt was established, was used to stand for final aging quantity of asphalt pavement, aging equation and were used to research the performance of UV absorption anti-aging agent in different compound mode, optimum composite system of asphalt composite UV absorption anti-aging agent was found, and compliance dosage of components in optimum composite system was research after then. The results of the study show that: The aging law of asphalt ultraviolet radiation aging follows the equation next, ; asphalt UV absorption anti-aging agent composed by 5% antioxidant and 1.5% light stabilizer have the best anti-aging performance to UV radiation.
Video Segmentation Based on Area Selection
Authors: Chai Xiao Li , Yu Hai Zhu , Deng Hua
Published: January 2014

This paper presents a video motion object segmentation method based on area selection. This method uses a simple and practical space first region segmentation method, it through the motion information and space-time energy model to multiple choice of area, at last, the accurate segmentation object can be obtained throuth some post-processing technology. Experiments prove that this algorithm has good robustness.
Human Face Recognition Based on the Core Characteristics under the Condition of Illumination
Authors: Li Wen Hui , Ma Ning , Wang Zhi Yan
Published: January 2014

A core characteristics based human face recognition method under the condition of illumination is proposed according to the problem of the sharply declining human face recognition rate under the condition of light. With this method, if human face image is affected by light and the illumination is forward or side can be judged; the images affect by illumination are processed using the strategy of frequency domain replacement, and then the key areas of human face image are divided and then are recognized using support vector machine (SVM) based on the unit of area, and finally the recognition results are integrated. The experimental result shows that this method can produce a better recognition effect than other methods in view of the problem of illumination.
Study on Factors of College Student's Network Service Time Based on Bayesian Networks
Authors: Wu Chun Wang
Published: January 2014

Due to the uncertainty of the factors that influence the network service time and other characters of college student, Bayesian Network is used to model this kind of system. Different algorithms are used for learning Bayesian Networks in order to compare several models. It is suggested that researchers can use Bayesian Networks to explore the potential relationship between variables of complex social problems. The result indicates that learning target and family closeness degree are the key variables which influenced college students network service time. Origin of student and family economy didnt influence college students network service time directly. Schools and community should strengthen the education of college students life planning and communication with parents.
Operating Temperature Analysis of LED with Cylindrical Cu Slug
Authors: Vairavan Rajendaran , Sauli Zaliman , Retnasamy Vithyacharan
Published: January 2014

High power light emitting diodes is the new era of lighting due to momentous supremacy in terms of lighting efficacy over traditional lighting systems. The reliability of LED is dependent on its junction temperature. This study confers on the thermal and stress characterization of LED chip with copper cylindrical heat slug through simulation method. The simulation characterization was carried out with Ansys version 11 at ambient temperature of 25°C under natural convection condition. The LED package was powered with input powers of 0.1 W, 0.5 W and 1W .Results indicated that input power influences the junction temperature and stress of LED chip.
Heat Sink Fin Number Variation Analysis on Single Chip High Power LED
Authors: Sauli Zaliman , Vairavan Rajendaran , Retnasamy Vithyacharan
Published: January 2014

Thermal management of high power LED is crucial the reliability and performance of the LED affected by the heat produced during photon emission. Heat sinks are utilized to dissipate the heat and to lower the operating junction temperature of LED. This paper demonstrates a simulation work done to evaluate the influence heat sink fin number on the junction temperature and stress of single chip LED package using Ansys version 11. The heat sink with fin number of 4 fins, 6 fins and 8 fins were used and compared. Results showed that increase in heat sink fin number significantly reduces the junction temperature of the LED package.
A Study on the Influence of Cysteine and Magnesium Ions on Brain Dementia
Authors: Yin Lu , Zhu Shuang Yue
Published: January 2014

As the population ages, dementia disease is increasingly becoming the most concerned social problems. According to the cause of dementia, it can be divided into many kinds class, among them with Alzheimer's Disease (Alzheimers diseases, AD) and Vascular Dementia (Vascular Dementia, VD) are common. Data shows it accounts for nearly 60% of total AD dementia patients, VD (20%), but only 2% of patients could get timely diagnosis and treatment, make its cognitive damage to a certain extent suppress and improve. for untimely diagnosis and treatment, most patients makes the disease development worse. In recent years, studies have shown that plasma Homocysteine,Hcy levels associated with AD. And studies show that from the power of the risk factors to the mechanism analysis, dementia disease level correlation with magnesium ions. On this basis, this study of plasma homocysteine in patients with AD,VD and magnesium ion detection results were analyzed retrospectively. Discuss their levels between the distributio relationship of patients ages in AD and VD.
A New Type of Lithium Ion Battery Water-Based Composite Binder Dispersion Effect Research
Authors: Li Lei , Wang Xin Ge , Wang Yuan Da , Zhang Xian Yu , Chen Gui Qin , Xia Qing
Published: January 2014

Gelatin and polyethylene oxide and styrene-butadiene rubber to blend with water as solvents, and add to improve adhesion surface active agent, the composition of multi-component blend to lithium iron phosphate batteries battery anode materials have the effect of adhesion. Experiments show that the multi-component water-based composite binder in lithium iron phosphate coating process good dispersion effect.
Investigation of Surface Roughness on Platinum Deposited Wafer after Reactive Ion Etching Using SF6+Argon Gaseous
Authors: Sauli Zaliman , Retnasamy Vithyacharan , Yeow Aaron Koay Terr , Chui Goh Siew , Anwar K. , Abdullah Nooraihan
Published: January 2014

This paper investigates the factors that affect the surface roughness on a Platinum deposited wafer after reactive ion etching (RIE) using a combination of SF6 and Argon gaseous. A total of three controllable process variables, with 8 sets of experiments were scrutinized using a systematically designed design of experiment (DOE). The three variables in the investigation are ICP power, Bias power, and working pressure. The estimate of the effect calculated for ICP power, Bias power, and working pressure are-4.9288, -6.2383, and-4.7223 respectively. All three factors gave negative effects. This implies that the surface roughness decreases when ICP power, Bias power, and working pressure is high. The Bias Power is the most influential factor followed by ICP Power, and working pressure.
The Optimization to the Die of Concave-Convex Blanking Material
Authors: Lu Yi
Published: January 2014

To increase the service life of the die in blanking stainless steel plate, this paper tries to optimize the blanking die. By adopting reasonable lifting and pushing structure in the die to realize up-put the concave and down-lie the convex which adds the sharpening repair times of concave-convex die. The study finds that the die is easy to operate and maintain and has the character of repeating sharpening repair after one-time heat treatment, which can greatly prolong the dies service life and is suitable to bulk blank stainless steel plate.
Maximum Likelihood Parameter Estimation of CNC System Reliability
Authors: Gu Yan , Wang Yi Qiang , Zhou Xiao Qin , Yuan Xiu Hua
Published: January 2014

In order to increase calculation accuracy of CNC system reliability, this paper proposed a maximum likelihood parameter estimation method based on improved genetic algorithm. In the parameter estimation process for CNC system reliability distribution model, the maximum likelihood function value was gained by improving genetic algorithm through simulated annealing algorithm. Parameter estimation was carried out by setting Weibull distribution as an example. The result shows that the improved genetic algorithm can increase solution efficiency and convergence rate. Besides, it can effectively estimate parameters of reliability distribution model.
The Vertical Mill Slag Micro-Powders' Particle Size Distribution and Microstructure Analysis
Authors: Ye Tao , Chen Xiao Dong , Jiang Bin
Published: January 2014

Vertical mill grinding system is one of the important cement grinding equipments developed in recent years. In this paper, through the industry vertical mill grinding GGBS carried out a detailed analysis of particle size, on this basis, using the attached to the sample preparation method, obtained the typical SEM images of GGBS through industrial vertical mill, and using particle image analysis software for slag microstructure has carried on the qualitative analysis, obtained the change rule of microstructure of the grinding process. Meanwhile, using shape index, roundness coefficient, flat degree, angularity and surface roughness quantitative characterization of the microstructure of slag powders.
Study on Nail Holding Power of Bamboo Integrated Timber for Decoration
Authors: Li Guang Yao , Wang Wen Guang
Published: January 2014

By measuring the nail holding power used in the decoration of bamboo integrated timber, analyze the influence of bolt category,diameter of guiding bore and screwing depth. The results show that the bolt joint strength of bamboo integrated timber was obviously increased in usage with the decreasing of diameter of guiding bore and the increasing of screwing depth.
Sensitivity Analysis of Tool Axis Errors in Large Mill-Turn Machine Tools
Authors: Sun Pan Pan , Peng Fang Yu , Yuan Shuai , Yan Rong , Min Zhuang
Published: January 2014

This paper proposes an approach to carry out sensitivity analysis of tool axis errors caused by component geometric errors, in order to meet the high precision requirement in holes series machining with mill-turn machine tools. Firstly, ideal kinematic model and real kinematic model considering geometric errors of the mill-turn machine tools are built respectively based on homogeneous transfer matrix and multi-body system theory. Secondly, tool axis errors caused by component geometric errors are simulated using an orthogonal test. Finally, sensitivity analysis of tool axis errors is implemented by means of range analysis and variance analysis.
Test and Research on Vibration Characteristics of EBH300(A) Roadheader
Authors: Yang Zi Xian , Ji Xiao Dong , Jiang Hai , Hu Yu Long , Wu Miao
Published: January 2014

Cantilever excavator is widely used in fully mechanized mining face at present domestic coal mine, Its high efficiency, reliable working state is the promise of mine production and safety production. In this paper, using the mining vibration recorder for EBH300(A) roadheader vibration signal acquisition, and using MATLAB to analyze in the time domain analysis. Its useful to understand the vibration characteristics of roadheader work, and of important realistic significance for the tunneling machine structure optimization design and researching on fault diagnosis.
The Safety Assessment Research on Front Body Structural of Commercial Motor-Vehicles of Passenger Transport
Authors: Li Qiang , Dai Wei Liang , Cui Hai Tao , Chen Ye , Yang Chao
Published: January 2014

A Load-type Commercial Motor-vehicle of Passenger Transport was studied as the research subject in researching front crash safety evaluation technology of front structure by the real car crash test methods, which is to explore the front crash safety evaluation technology suitable for china's National conditions. The results show that the Testing procedure and Evaluation will not only conducive to the carrying out of Commercial Motor-vehicles of Passenger Transport access about structural safety detection, but also played an important role in promoting the safety of the domestic bus, road transport safety, and social harmony.
Applying TRIZ to Improve the Structure of Walkers
Authors: Chang Chia Pao , Lin Ying Hsiang
Published: January 2014

A walker is used for the patient of weak or lack of balance and mobility. Such as the older adults after orthopedics operation, Parkinson's disease and cerebral palsy patients. But, It is dangerous when walkers are pulled up and easily feel sore on both arms of the user. We apply TRIZ theory to solve about problems. Our invention integrates the demands of stability and speed of walking. We add four ball bearings to the new spring structure. While needs moving, the user may push walker lightly via ball bearings. On the contrary, when needs sustainability the user just uses the gravity of his body to let balls get into the four anti-slip mats.
Strength Design of a Mechanical Parking System
Authors: Xu Bin , Yu Zhong Jian , Yang Yu Qing , Zhang Tao
Published: January 2014

Mechanical parking systems are widely used special electromechanical equipments. With the increasing interests on strength safety, it was becoming a hot spot to achieve its strength properties precisely. Based on Timoshenko beam theory, a mechanical parking system was simplified to a two dimensional model, and strength calculation was performed with analytical method. Furthermore, finite element method was adopted to calculate the strength properties of this mechanical parking system, and the maximum Von Mises and shear stress were approached. By comparison with experimental stress analysis, the finite element analysis was precise, which showed a potential application in practical engineering.
10 kw Vertical Axis Wind Turbine Spindle Design and Optimization
Authors: Li Qiao Mei , Cao Yang , Wu Guo Qing , Chen Xing Hua , Cao Yan Hua
Published: January 2014

The spindle of a 10 kw vertical axis wind turbine is designed in this paper, and the relevant geometric parameters is given, and build the geometry of the finite element model. Calculation of the spindle under wind load and dead weight , and analyse the spindle Von Mess stress, deformation nephogram, and give the former six order vibration mode of the spindle. Through the analysis, Then the design parameters of the spindle are optimized. and the optimized structure of spindle has been got. optimized spindle is in lower quality, more satisfy the requirement of wind turbine running under high load at the same time .
The Study of Ti-Al Layered Composite Electrode in the Anti-Gravity Casting Method
Authors: Han Zhao Hui , Zhu Pei Xian , Yang Xiu Qin , Zhou Sheng Gang
Published: January 2014

The structure and properties of the Ti-Al composite electrode materials prepared by the anti-gravity casting method was analyzed by SEM, EDS, four-probe method and electrochemical workstation. The results show that the metallurgical bonding of Ti and Al can be achieved by the method of anti-gravity casting with the Al temperature800°C, mold temperature of 400°C, pressure difference 0.5MPa. The electrochemical properties of the composite electrode materials is much better than pure Ti anode. Under the same condition,polarization potential of composite materials will fell by 32mV~43mV in polarization potential of pure Ti, it can be increased by 60% or more in current density, the resistivity was only 1/10 of pure Ti.
A Study on the Flow Field Simulation of Insertion Flow Sensor in Large Diameter Pipeline
Authors: Chen Jian Zhen , Li Bin , Wang Hui , Lian Xiao Man , Xu Yu Ming
Published: January 2014

The study is to employ the analysis method of CFD simulation, when putting the insertion flow sensor in large-diameter pipe, to analyse the characteristics of flow field distribution of the insertion flow sensor in detail. It reveals the flow field distribution at the position of average flowrate and the vortex shedding around insertion flow sensor, which provides an important basis for design of the insertion flow sensor with high performance.
Collective Smart Вehaviour of Magnetic Nanoparticles at Simulation of Hysteresis Phenomena in Artificial Ordered Array
Authors: Andreevich Peretyatko Alexey , Nefedev Konstantin V.
Published: January 2014

The high performance algorithm for supercomputer simulation of magnetic nanoparticles arrays was elaborated and implemented in parallel c++ code. Our program package allows a modeling of magnetic hysteresis phenomenon in the system of the magnetic spherical monoaxial one-domain dipole nanoparticles fixed in node of a square lattice with the period of 10-8 m in frame of Stoner-Wolfforth approach. During numerical experiments dependences of a type of curves of a hysteresis on number of particles and values of a critical field are investigated. It was showed, that the area of loops has proportional dependence from individual critical field of nanoparticles.
Dynamic Modeling and Numerical Simulation of Electrorheological Fluids Based on Lattice Boltzmann Method
Authors: Zhu Shi Sha , Tang Tao , Tang Xin Zi , Liu Jin Gang , Qian Xue Peng , He Hao
Published: January 2014

Since the fast response of the internal structure of the Electrorheological (ER) suspension fluids occurs in the controlled space (electrode distance is generally 1-2 mm) of the applied electric field, where the main feature of the ER suspension fluids in the certain time and spatial scales is low shear rate but high flow resistance, which means the Mach number and the Reynolds number are generally small, it can be researched as micro-scale flow. According to this characteristic, the author proposed a discrete-particle-motion model of the ER suspension flows based on the Lattice Boltzmann method(LBM) of the Mesoscopic kinetic theory. The results of the dynamic simulation showed that the model solved the problem of describing the changes of the rheological properties of some local flow fields and the influences on the particle movement during the two-way coupling in this flow field.
Heat Transfer Characteristics of Fe3O4-H2O Nanofluids by External Magnetic Field
Authors: Yin Shao You , Wu Zhi Jiang
Published: January 2014

An experimental system of Fe3O4-H2O nanofluids on convective heat transfer characteristics was presented. The influences of magnetic field direction and intensity, particle mass fraction, axial distance were presentd. The experimental results show that the synergic function between the external magnetic field and the thermal field has impact on convective heat transfer characteristics of the device.
Analytical Solutions of Electromagnetic Field and the Heat Generation Rate during Induction Heating of the Semi-Infinite Body
Authors: Li Ji Shan , Liao Ri Dong
Published: January 2014

The electromagnetic field and the heat generation rate distribution in the semi-infinite body which is heated by the induction coil, are obtained by solving the Maxwell equations through the analytical method. The impacts of the air gap width, induction coil width, current density and current frequency on the heat generation rate distribution in the workpiece are studied. The results show that the heat generation rate in the workpiece is in direct proportion to the square of the eddy current density and the square of the induction coil width. The heat generation rate follows the exponential attenuation law with the increase of the air gap width. The current density has effects on both the maximum heat generation and the heat generation distribution. When the effect of the air gap is neglected, the higher the current frequency, the larger the maximum heat generation rate. However, when the effect of the air gap is considered, the maximum heat generation rate will increase with the augment of the frequency when the frequency is less than the critical frequency and decrease with the augment of the frequency when the frequency is larger than the critical frequency, which is firstly reported in the paper. Moreover, the higher the current frequency, the heavier the heat generation rate attenuation in the workpiece.
CFD-Based Study of Velocity and Temperature Distribution among Rib-Tube in Heat Environment
Authors: De Su Hou , Fu Zhang Yu , Yong Che Ji , Lei Wu Shi , Wen Xiao Long
Published: January 2014

The velocity distribution coupled thermal and fluid flow a rib-tube was studied in this article. Based on theory analysis and numerical simulation, we choose modal and wall function to simulate the flow in rib-tube, velocity to definite the dispersed phase. The governing equations were built and solved by numerical way. The progress of flow and heat exchange in rib-tube, the rules and contours of temperature, velocity were obtained, they shows that, along the rib-tube, velocity was changed with the temperature rising , which could give us a reference for engineering application .
Ellipse Contact-Impact with Non-Fixed Position
Authors: Zhang Ying Xue , Yao Wen Li
Published: January 2014

The purpose of this paper is to study the contact-impact between ellipse and ground. The contact-impact position is non-fixed when the ellipse is rotated. Ellipse equations are built by generalized coordinates. The contact point is estimated by the elliptical geometric characteristics and equations. Do dynamics analysis by the method of continuous processing which uses spring damper mode in this point. This spring damper mode is based on the nonlinear spring damper model of Hunt-Crossley. Friction is ignored in this paper. Finally the numerical solution is given by Matlab.
Design and Implementation of a Precision CNC Turn-Mill Machining Center Controller
Authors: Sun Ke Zheng , Zhou Xue Feng , Chen Xian Shuai
Published: January 2014

This paper presents a novel open architecture for a Precision CNC Turn-Mill Machining Center control system based on PC and Motion Control Card. A CNC Turn-Mill machining center is introduced. The hardware and software architecture is designed based on the concept of modularization. The implementation of key modules is given out. A rough interpolation algorithm with look-ahead function is introduced to improve the machining efficacy. The engineering verification proves that the system can fully meet the expected demands and easy to use.
A Non-Contacted Magnetic Sensor with Direction Memory Based on Biot-Savart Theory
Authors: Jiang Hui Lue , Liu Bo , Liu Chuan Dao , Liu Jun Li
Published: January 2014

Magnetic sensor with direction memory can be used to control the motion direction. Based on Biot-Savart theory, the magnetic field distribution expression of a bar-type in external space is derived, and the superposition distribution of both inner and outer magnet is directed by the principle of superposition, which can be used to quantitatively describe the magnetic distribution formed by inner and outer magnet, and accurately scope the effective field. According to the operating characteristics of the magnetic reed switch with different value of pull-in and drop-out, by a proper detecting distance to ensure the magnetic field strength value of inner magnet at magnetic reed switch greater than pull-in value and less than drop-out value to make magnetic reed switch maintaining the original state when outer magnet leaving. Meanwhile, by a proper detecting distance to ensure the superinposed magnetic field strength value greater than pull-in value in the forward direction, and less than drop-out value in backward direction. Calculation of response curves show the impacts of magnet size, response intensity and detecting distance variation on the sensor.
The Implementation and Optimization of 3D Variable Cross-Section Roll Forming Control System Based on SIMOTION Path Interpolation
Authors: Zhu Xin Bo , Li Qiang , Guan Yan Zhi , Wang Jian
Published: January 2014

The 3D variable cross-section roll forming is a kind of new metal forming technology which combines large forming force, multi-axis linkage movement and space synergic movement. This paper mainly introduces the application of path interpolation function of the Siemens SIMOTION motion control system and multi-axis synchronous function in 3D variable cross-section roll forming control system.
Brushless DC Motor Controller Design and Double-Loop PID Parameter Tuning
Authors: Wang Hua Zhang , Huang Qin Zhen
Published: January 2014

An efficient and practical controller was designed, which achieves high performance for a BLDC motor. Actual hardware experimental platform was established. Double-closed loop control scheme using PID algorithm is presented and applied into the system successfully. Through the tuning of PID parameters, the start and stop of motor is fast, current fluctuation is small, and the actual speed of operation is consistent to the set speed, the error of stability maintains at 10r/min or less. The experiment result shows the BLDC control system operates smoothly, and it has high reliability, robustness.
Investigation on the Heat Conduction in Si/3C-SiC/Graphene Film
Authors: Wang Zan , Guan Hua Wei
Published: January 2014

Based on the nonequilibrium Molecular Dynamics method, interfacial thermal resistances of Si/3C-SiC/grphene composite films are investigated. The dependencies of interfacial thermal resistances of Si/3C-SiC and 3C-SiC/grphene on temperatures and the thickness of buffer layers are simulated separately. The results indicate that the interfacial thermal resistances of Si/3C-SiC and 3C-SiC/grphene increase with the increase of temperatures at the range of 100~700K, and converge to 3.4×10-9 Km2/W. In the Si/3C-SiC/grphene composite film, 3C-SiC connects Si substrate with grphene sheets. The results show the relationships between interfacial thermal resistances and the thickness are not prominent, and the maximum value of interfacial thermal resistance locates at 24×3.35 Å.
Data Collection and Quality Assessment System for Flight Simulator
Authors: He Xiang Yong , Ling Xiao Xi , Fang Qiang , Lei Ting
Published: January 2014

In the field of professional pilot training, flight simulator is becoming increasingly important, which draws more and more attention nowadays. For effectively guiding and assessing the training quality of pilots while being trained, the system needed to record the video of the flight data from monitors without bringing any changes to the flight simulator. The system extracted the frames from the video and then the images would be processed through binarization. So we could easily recognize the flight data from the binarization images by using the pattern recognition technology. Thus the flight track could be reconstructed in three dimension based on the OpenGL API, which will be very beneficial to the training. Altogether, the system can take advantage of the resources to guide and assess the training process of pilots more efficiently as well as developing the pilot training industry.
Study of Quenching Organization Property under Wind Cooling Condition
Authors: Tu Fu Quan , Mao Yang , Xu Ren Bo
Published: January 2014

In this paper, the steel of U71Mn specifications for 60kg/m heavy rail is seen as a research object. Experimental method is employed to study the heavy rail hardened layer, including surface hardness, micro-structure and cross-sectional hardness under different cooling time during quenching. Experimental results showed that obtained heavy rail after wind cooling quenching finally met the Tb/T2344-2003 43-75 kg/m standard. Best quenching treatment condition is found and the defect is reduced to large extent when quenching time is 40 seconds, cooling time is 40 to 45 seconds, superior to the traditional spray cooling condition. These results provide an important reference for the quenching process of heavy rail.
Web Structural Optimization of the Big Aviation Herringbone Gear Based on APDL Language
Authors: Zhao Ning , Sun Lin Lin , Fu Bi Bo , Li Hai Feng , Wang Qi Bo
Published: January 2014

We attempt to optimize the structure of double web on aviation herringbone gear with a big transmission ratio. We established an optimization mathematical model of the big aviation herringbone gear web, developed an optimization calculation procedure based on APDL language. The web structure of big aviation herringbone gear in a helicopters main gearbox has been optimized. We calculated the dynamic response of the gear web before and after optimization and proved that our method can improve its dynamic characteristics, reduce its stress level and achieve good results.
Construction of Johnson-Cook Model for Gr2 Titanium through Adiabatic Heating Calculation
Authors: Deng Xi Guang , Hui Song Xiao , Ye Wen Jun , Song Xiao Yun
Published: January 2014

This study derived the five parameters in Johnson-Cook equation of CP titanium Gr2. Quasi-static and dynamic compression tests were designed to measure mechanical properties at strain rates of 10-3s-1 and 6000s-1. In order to secure the validity of tested data, a novel fixture was proposed to reduce the displacement measurement error in MTS testing system and the signal processing procedure of compressive split Hopkinson pressure bar for the present study was demonstrated. With the tested data and calculated adiabatic heating temperature rise, parameters A, B, n, m, C have been derived based on mathematical deduction and solve. It was found that the constructed constitutive model fit the tested data well and was able to restore the yield strength value at high strain rate.
Morphological Characterization of Al-2.0wt%Si-2.5wt%Cu Alloy Produced by Direct Chill Casting and Electromagnetic Stirring for Thixoforming Process
Authors: Torres Luis Vanderlei , Benati Davi M. , Zoqui Eugênio José
Published: January 2014

This work evaluates, by means of its morphological characterization, a new Al-2.0wt%Si-2.5wt%Cu alloy produced by direct casting under electromagnetic stirring for thixoforming process. The alloy was submitted to re-heating treatment in two conditions of solid fractions, 45% and 60%, for 0, 30, 90 and 210 s. Re-heating treatment times promote solid phase particles globularization, presenting average grain sizes of approximately 90 μm for both solid fraction. These results show that the alloy is viable for thixoforming process, especially in the condition of 90 s of treatment time at 45% and 60% of solid fraction, that presents grain size about 90 μm and shape factor higher than 0.60. Another important fact about the small grain/primary particle size is related to the use of electromagnetic stirring in its production, that promotes the breakdown of the material structure and consequently stimulates globularization.
Evaluation of the Thermal and Kinetic Behavior of the SS Obtained from the Combined Treatment of Liquid Leachate with Domestic Sewage in UASB Reactor
Authors: Filho Francisco Ferreira Dantas , da Silva Morais Crislene Rodrigues , Dantas G.M. , Pereira Vilany Santana , Souza M.A.F. , Lima I.S.
Published: January 2014

The present study reports the results obtained from Sewage Sludge SS for the obtainment of bio-oil through the pyrolysis process. The research aimed to evaluate the thermal and kinetic behavior of the bio-solid. In this work studies were made on physicochemical, elemental analysis (CHNO). Thermogravimetry (TG) with heating rate of 10o C min-1 over two atmospheres (synthetic air and N2), Thermodynamics (ΔH, ΔS e ΔG), kinetic and spectroscopic. The thermalgravimetric study stated a thermal stability at 30°C. The kinetic calculations were made aiming to observe parameters such as: Activation energy (Ae), frequency factor (s-1), standard deviation (sd) and linear coefficient (r), which were calculated by Thermogravimetry by the methods of Coats-Redfern (CR); Madhusudanan (MD); Van Krevelen (VK); Horowitz-Metzger (HM). In the spectrometry in the infrared (IR) region it was observed bands referring to the presence of water, organic material and silicon oxides in the SS samples analyzed.
Structural and Thermomechanical Evaluation of Bionanocomposites Obtained from Biodegradable Polymers with a Organoclay
Authors: Costa da Silva Milena , de Oliveira Sara Verusca , Araújo Edcleide Maria
Published: January 2014

In this study bionanocomposites were prepared from biodegradable polymer matrices such as poly (lactic acid) (PLA) and PBAT/PLA blend commercially known as Ecovio®, with abundant smectite clays in Paraíba and modified (OMMT) with Praepagen quaternary ammonium salt. Systems with PLA and with the blends of PBAT/PLA were prepared with addition of bentonite clay at a concentration of 3wt.%. in a twin screw corrotational extruder. The systems containing PLA/OMMT and blend of PBAT/PLA/OMMT were characterized by X-ray diffraction (XRD) and Heat Deflection Temperature (HDT). From the diffractograms of bionanocomposites PLA/OMMT and PBAT/PLA/ OMMT it was observed a probably microcomposite structure. It was also observed that the HDT of PBA/PLA/OMMT and the blend of PBAT/PLA bionanocomposites was lower in relation to pure PLA and its PLA/OMMT bionanocomposite.