bluuebunny/crossref_metadata_2025 huggingface dataset:
Simulation of Clouds Dynamics Based on the Change of Sight Distance
Authors: Fan Xiao Lei , Zhang Li Min , Yu Ying Fu
Published: August 2014

We propose a method of clouds simulation to simulate the clouds dynamics based on the change of sight distance in the paper. With the change of sight distance, the grid resolution of simulation space can be adjusted. Euler equations which describe the movement of clouds are discretized on the dynamic grids, and upwind difference is introduced to ensure the stability of simulation. Cornette-Shanks phase function is embedded into the multiple forward scattering model. The experimental results show that the proposed method can promote the rendering efficiency and achieve real-time rendering of clouds.
Corrosion Behavior of Titanium Alloy and Titanium in Different Solution
Authors: Zhao Shu Fen , Jia Hong Guang , Wang Jin Hui
Published: August 2014

Anti-corrosion performance of titanium alloy/pure titanium was studied from the aspect of electrochemistry. Anode polarization test and electrochemistry impedance spectroscopy were applied to investigate the influence of different ionic solution on corrosion behaviors of titanium alloy and pure titanium. From the X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis on the titanium samples after surface corrosion or not, we found that the corrosion performance of pure titanium was more sensitive to ionic solution than that of titanium alloy, and oxidant ions played a determine role in the corrosion process of pure titanium.
Small Quantities of Cargo Transportation Route Selection Base on Minimum Spanning Tree Algorithm
Authors: Yu Hong Yan , Ke Jin Long , Li Meng Ting
Published: August 2014

This paper mainly studies the single distribution center in the circumstances, transport path selection and vehicle allocation problem of small batch of goods. Using the theory of minimum spanning tree theory to the entire logistics network path selection research, while determining the nodes need to configure the transport vehicle for shunt transport, further establish the logistic distribution routing out several cars choice model, but also provides a direction for future research on this type of problem.
Study on the Method of Vibration Signal De-Noising Using Wavelet Packet Based on QPSO
Authors: Zhao Kai , Li Ben Wei , Chen Jing
Published: August 2014

Although many wavelet de-noising methods have been studied and proposed, the parameters of them are obtained by experience mostly, which makes the de-noising effect instable. To solve the issues, the solutions, such as the selection of wavelet function and threshold function, the calculation of decomposition levels, the optimal wavelet packet basis and the thresholds obtained based on QPSO, have been studied in this paper. Every parameter is obtained by calculation. This method is applied to the de-noising experiment of sine and vibration signals. Through the experimental verification, the effect of this de-noising method is obvious.
The Solution to Node Importance in Complex Networks Based on PageRank Algorithm
Authors: Li Guang Li , Li Han , Wang Ye Ran , Zhang Tong Bo
Published: August 2014

Network science is an emerging interdiscipline that can solve practical issues by researching and analyzing properties of complex networks. In this paper, a modified algorithm based on PageRank is developed to construct the evaluation model in directed-weighted networks. This model can effectively determine the node importance in networks. Discussions about how to construct networks with the use of relationship between data and how to determine the weight of edges form the major concern of the present studies. Schemes for solving the above issues can differ in different networks. We successfully apply this model to citation, co-author and weibo follower networks. Through the results, we find that this optimized model can efficiently evaluate the importance of nodes in different complex networks and has strong applicability.
The Study of a Fingerprint Encryption Code Model
Authors: Jia Yo Bo , Liu Dan Li , Ding Qian Qian , Zhang Jian Feng , Zhang Yun Long
Published: August 2014

This paper introduces the present situation of the two-dimensional code and problems in two-dimensional code in the process of development,and discusses the security problem of two-dimensional code decoding information,then proposes a human fingerprint encryption algorithm based on two-dimensional code model.The realization of the model results not only improve the safety of two-dimensional code information,but also develop a broader space for the development of two-dimensional code in the future.In recent years,the intelligent mobile phone of popularization provides a solid foundation for the development of two-dimensional code software function.The application of two-dimensional code has changed the traditional mode of the Internet users by using URL to browse and download.This way combine with the traditional value-added service,and bring convenience for people's life.However, due to usually adopt open mode, people did not centralized management and control of it,therefore the personal information in two dimensional code was decoded easily,and the safety of two-dimensional code information becomes an important aspect of new value-added service application of two-dimensional code.
Topological Structure - Based Rough Sets and Rough Logic
Authors: Zheng Ya Lin
Published: August 2014

We introduce a more abstract description of rough set H in the most commonly topological structure in spite of the restriction of equivalence relation R, and the restriction of special topological space induced by R – space. Then we discuss neighborhood structure based on abstract rough set structure and general topological structure T, and research approximate reasoning problems.
Weakness and Improvement of an Efficient Key Agreement Protocol
Authors: Liu Shuang Qing , Xia Liang , Zhang Meng Zi , Xie Bao Ling
Published: August 2014

Xiao and Li proposed protocol XKAS and claimed it to be an efficient and secure two-party authenticated Diffie-Hellman key agreement protocol. In this letter, we show that the protocol is vulne- rable to a key-compromise impersonation attack. We also proposed XKAS+, which can withstand such attacks. The new protocol enjoys this property at the expense of a slight increase in computational workload with respect to the original version.
Research on Bandwidth Allocation of Multimedia Communication System Based on Internet of Things
Authors: Yang Huai De , Ren Zi Liang
Published: August 2014

In Internet of Things applications rapidly globalizing trends, especially the applications based on multimedia, traditional static bandwidth allocation method or dynamic bandwidth allocation algorithm based on business segments has been difficult to adapt to the new situation, in order to ensure the transmission performance, a new bandwidth allocation scheme is proposed which is based on RBF neural network . Simulation results show that the new scheme can effectively improve system stability, improve the utilization of system bandwidth resources.
Research on Design of Network Curriculum
Authors: Luo Ying , Zhang Xiang Qing
Published: August 2014

The development of network technology based on information technology has brought profound change to traditional education methods, and network course, as the best carrier of teaching application in the era of internet, attract more and more attention. The paper introduces the network curriculum design principles, content and process models, existing problems and countermeasures.
Information Communication Technology Applications for World Heritage Site Management
Authors: Zhang Wei Ya
Published: August 2014

With the development of information communication technology (ICT), World Heritage Site becomes rely on ICT to manage tourist and resource. This paper examines the concept of ICT and how it could be applied to World Heritage Sites (WHS). This paper also presents the uses of ICT at heritage sites and determines the extent to which ICT can be applied to WHS.
Design and Realization of Collaborative Simulation on VRNET and VR-Forces Cross Platform
Authors: Zhang Guo Hui , Li Xin , Zhang Wen Ge , Yang Jian Kang
Published: August 2014

—Aiming at the problem of the dynamic deployment ability of VR-Forces which is the computer Force generation tool be stronger but the communication network simulation ability be shortage, take connecting a development as breakthrough, and communication simulation ability of the communication network simulation tool VRNET be strong but the ability of dynamic state deployment not enough, designing a cross-platform on two types of VR-Forces and VRNET to carrying on collaborative simulation, Adopting the collaborative simulation integration project with the development of the interface agent, and making a thorough analysis of the interface agent project of the work principle and realization method .
Optimization of Maintenance Equipment Tool Types Based on Triangle Fuzzy Number
Authors: Deng Li Jie , Cheng Zhong Hua , Wang Ya Bin , Yang Zhi Yuan
Published: August 2014

In the face of those cases which multi-type equipments are configured by organizational systems and types for maintenance support, some questions are indicated. For example, the functions of some equipment tools are repetitive and similar. The amount of types is large and so on. Those phenomena are bad to flexibility, support and preserving in army. The fuzzy theory and triangular fuzzy number are used in this paper. Colony benefit is obtained after positive and negative ideal point and grey correlation coefficients are confirmed. The similar maintenance equipment tools are selected further to integrate equipment tool types. The method followed subjective and impersonal illegibility and excerpted indexing system and weight values. It is validated to be feasible and effective.
Optimal Power Flow Solution Using the Harmony Search Algorithm
Authors: Ren Ping , Li Nan
Published: August 2014

Inthis paper, the nonlinear optimal control problem is formulated as amulti-objective mathematical optimization problem. Harmony search (HS)algorithm is one of the new heuristic algorithms. The harmony search(HS) optimization algorithm is introduced forthe first time in solving the optimal power flow(OPF) solution. A case onoptimal power flow problem in the IEEE 30 bus system is presented to show themethodology’s feasibility and efficiency, compared with the existing optimalpower flow problem in power system methods, the search time of the HSoptimization algorithm is shorter and the result is close to the idealsolution, simultaneously.
Power Harmonic Analysis System Based on Virtual Instrument
Authors: Chen Wei , Shi Wen Fang , Chen Long
Published: August 2014

This paper presents a power harmonic analysis system based on virtual instrument. LabVIEW data acquisition module was used to acquire waveform data in this system. Combined with FFT (Fast Fourier Transform) and phase difference correction method, amplitude, phase and frequency information of voltage and current’s every harmonic are obtained successfully. LabVIEW rich controls are employed to complete GUI (Graphical User Interface) design under windows and constructs network through TCP protocol. The realization and simulation of the harmonic detection algorithm are discussed in detail.
Reconfigurable Virtual Instrument Test System Research Based on Mobile Platform
Authors: Song Xue Kun , Song Peng Fei , Zhang Pei Jiang
Published: August 2014

Based on mobile communication platform, the dynamic measurement system of component virtual instrument structure assemble model was proposed according to the conditions of bad commonality and mobility of tradition measurement system. Reconfiguration virtual system of mobile communication platform was realized by the use of virtual instrument system of measuring different parameters at the Android operating system and accomplished wireless network testing capabilities meanwhile, and the flexibility and scalability of wireless interactive operation and meassured data in real-time monitoring system can be enhanced.
Research on Diffuse Optical Tomography System in Frequency Domain
Authors: Hou Tian Long , Fang Bin
Published: August 2014

In the past decades, the requirements of non-invasive, non-radiation in medical imaging diagnosis and treatment is much higher. Diffusion optical tomography (DOT) technology increases more widespread concern. In this paper, a system designed in the frequency domain for diffuse optical tomography (DOT) imaging is described. The experimental platform utilizes 660nm laser modulated to 100MHZ, 16 parallel positions of detection at which a photomultiplier-tube is placed to detect flux of light on the external periphery of the tissue-simulating phantom made by gelatin. The reconstructed image of the absorption and scattering coefficients are obtained by using the Levenberg-Marquardt (L-M) reconstruction algorithm to solve for the optimal fitness between the measurement data and calculated data. This paper puts forward a new method that calculates the flux of area on the external periphery of the model by the forward algorithms to reduce the measurement error, which is caused by the mismatching between the flux of area the photomultiplier detects and the flux of dot the forward algorithms calculate in the traditional method. The experimental result shows that the proposed method can improve the reconstructed image of absorption and scattering coefficients
Research on Remote Sensing Image Geometric Correction Method and Precision Analysis
Authors: Liu Xiao Li
Published: August 2014

This paper first introduced the geometric correction method for remote sensing image used in the software, put forward the method precision visualization comprehensively and systematically describes the quality of remote sensing image rectification. This paper illustrates an instance method and its application through a IKONOS image rectification,and some useful conclusions are obtained.
Keywords: Remote sensing image; image rectification; accuracy; spatial interpolation; error
Study on the Wrapping Error of GREEN’s Function Sampled in K Space
Authors: Tang Bo , Zhang Zong Bo , Tang Shuang Xi , Liu Guo Ping , Gao Jie
Published: August 2014

During the near-field acoustic holographic reconstruction with sampling GREEN’s function in k space, there will be aliasing which results in the wrapping error for the infinite extension of GREEN’s function in real space. The magnitude of wrapping error lies on the decrement of GREEN’s function in real space. The paper applies a 2-D low-pass filter to remove the hyper space element in order to reduce the wrapping error. The simulation indicates that the method can reduce the wrapping error in the holographic reconstruction efficiently.
Getting the Health Management Information System Building
Authors: Zhou Yu Fen
Published: August 2014

The software of the mental health records management system application mode were analyzed, and the mental health management information system adopts centralized deployment and decentralized application mode, the system adopts B/S/S structure mode, can be convenient and fast to provide a full range of community correction object mental health management information system, system maintenance system is mainly divided into administrator, judicial bureau management, community manager, counselor, correction, correction object family this several user role.
Research of the Experimental Teaching about IPSec Protocol Based on Transport Pattern
Authors: Liu Tao
Published: August 2014

As a result of the limitation of teaching equipment hardware conditions, server configuration and management of the experimental teaching is hard to finish involving multi-homed host and multiple IP subnets network experiment. Aimed at the problem existing in the experimental teaching and the characteristics of the server configuration and management courses use the VMware virtualization technology to build a virtual network to IPSec protocol based on transport pattern between multiple subnets experiment teaching. A real trial of experimental teaching is conducted among the 12-year students majoring in computer network in Zheng zhou Normal University, and the students provide a good feedback.
Study on Students’ Network Moral Education
Authors: Wang An , Zhang Xiang Qing
Published: August 2014

The moral education is an important part of college student work. In today, the network is closely connected with college student live; research on college students’ moral education has unavoidable effect with moral education work. The paper expounds the connotation, the necessity of implementation, current situation, and development countermeasures of network moral education.
The Economic Analysis on the Special Education Teachers in Human Capital
Authors: Lei Xian Long
Published: August 2014

the present situation of special physical education teachers' human capital in China, puts forward the special physical education teachers as both "physical capital" and "intellectual capital" of human capital, to improve the treatment level of special physical education teachers; Set up open, fair, fair employment, the incentive constraints mechanism, stimulate the potential of special physical education teachers, form good competition mechanism; Special physical education teachers should strengthen their own ethics education, improve professional quality, enhance the ability of the research on the interdisciplinarity research, and realize own continuous increment of human capital; Increased investment to continue education, reform the unreasonable continue education investment system, construct lifelong continuing education system.
Discussion on Research Learning under the Network Environment
Authors: Huang Le Hui , Gui Bin
Published: August 2014

The rapid development of the internet has deeply changed the way of human life and learning. As an important learning concept being promoting in domestic and foreign education in recent years, the mode of research learning is changing with the development of internet. The paper summarizes the basis connotation of research learning, the advantages and disadvantages of implementing research learning by the internet, and matters needing to pay attention to in research learning under the network environment.
On the Design and Development of Micro-Course
Authors: Huang Le Hui , Gui Bin
Published: August 2014

Micro-course is important learning resource of online learning and mobile learning in micro-era. The paper reviews the basic concept and characteristics of micro-course, proposes the ideas and templates of micro-course teaching design, and introduces the methods of micro-course making.
Analyses the Mechanical Equipment Management and Maintenance
Authors: Leng Chao Qun , Huang Yu Ling
Published: August 2014

Equipment use, management, maintenance and repair of phase take up of the total life cycle of the equipment for the most part, pays special attention to the equipment management, ensure the safe and normal operation of the enterprise management work is a basic work, it keeps the foundation of the enterprise production and operation, affecting all aspects of the enterprise. This paper points the analysis construction site construction machinery equipment management problems and countermeasures. Construction machinery equipment compulsory maintenance measures are put forward.  
A Modified Exponential Smoothing Model for Forecasting Per Capita GDP in Yunnan Minority Area
Authors: Dong Zhi Sheng , Zhu Gu Sheng
Published: August 2014

Forecasting the per capita GDP of minority area is very important for the economic development for a society. This paper is to establish a model for prediction, and this model is based on the exponential smoothing (ES). First of all, the result of exponential smoothing model (ESM) is analyzed, and the accuracy of it is rather low. Then, we modified the exponential smoothing model and use the new model to predict again, with the average error being only 2.88%. The results show that the modified exponential smoothing model (MESM) is effective. The innovation of this paper is that the model is built based on a series of data collected from eight places, while normally a model is built based on data from one place.
A Traffic Capacity Model of Lane Occupation
Authors: He Yi Xuan
Published: August 2014

In modern society, traffic jam has already become a major problem which curbs the development of big city. And lane occupation is an important reason why traffic jam happens. After studying on the production condition, time and queue length of traffic jam after lane occupation happens, we propose a model based on famous traffic flow theory and we use related data to verify the rightness of our model. Result shows that our model can predict the development of traffic jam caused by lane occupation
Based on Geographic Information System of Tourism Resources and Circuit Management System Design and Implementation
Authors: Yang Huan He
Published: August 2014

By integrating tourism information and geographic information, research-based components of GIS technology, using MapObjects development of tourism information systems. Through the integration of geographic information, travel information , travel information for analyzes and discussion. Use MapObjects components , the use of C # in Visual Studio 2005 development platform below . Query information systems to achieve the basic features that make geographic data more easily travel data queries , making the map data and points of interest data more intuitive display to the user.
Design and Implementation of Room Management System of Hotel Based on J2EE
Authors: Dong Chong Jie
Published: August 2014

For the growing prosperity of the hotel industry,to improve the efficiency of hotel housing management, the paper adopts J2EE platform combine with JBPM workflow technology as a workflow development tools,using the SQL Server 2008 as database to develop hotel housing management system with friendly interface,completely functions and good security.The application of the system reduces the use cost of room management of hotel, improving the room management efficiency of the hotel.
Material Selection and Management Based on Cybernetics
Authors: Guan Yan , Chen Zhe
Published: August 2014

In Cybernetics proposed by Liu Guanzhong, it stresses to analyze and study problems from aspect of reason and provides new perspective and theoretical guidance for design. Materials are medium to express and realize products and it can improve accuracy, adaptability and integrity of material selection under Cybernetics theory. This thesis presents the concept and theoretical characters of Cybernetics and mainly stresses selection principal and management method for product materials on the basis of it.
Research on Episode Segmentation for MIS Workflow
Authors: Ye Fu Li , Shi Gui Lian
Published: August 2014

In this paper, a Bayesian method for fusing multiple visual cues is proposed for MIS (Minimally Invasive Surgery) workflow segmentation. The proposed technique investigates the characteristics of four basic events in MIS including idle, retraction, cauterisation and suturing. Visual cues related to shape, deformation, changes in light reflection, and other low level image features are fused using a Bayesian framework to achieve a high classification accuracy. Detailed in vivo experiments have been conducted to assess the accuracy and practical value of the technique.
The Comparative Study on Urban Transport and Urban Agglomeration Transport
Authors: Wang Zheng Yu , Li Cheng Bing , Zhang Yi
Published: August 2014

First, elaborates the definition and development of urban and urban agglomerations, urban transport and urban agglomerations transport and analyze the constituent elements of urban transport and urban agglomeration transport, laid the foundation for the research of this article. Secondly, the development of urban transport and urban agglomerations transport requires the effective convergence of urban transport and urban agglomerations transport. Urban transport and urban agglomerations transport mutual influence prompted urban transport and agglomerations transport coordinated development and rational planning. Finally, analyzed the difference of transportation, network layout, site settings between urban transport and urban agglomerations transport. Comparison urban agglomerations traffic and urban transport then draw similarities and differences, to reduce what transportation problems exist in the development of urban transport and urban agglomerations transport.
The Background and the International and Domestic Impact of 'General Data Protection Regulation'
Authors: He Zhi Le , Huang Dao Li , Lei Yun Ting
Published: August 2014

With the development of globalization and new technology, it is difficult for the existing data protection framework of EU to adapt to the new challenges inbig data era. The European Commission sought to establish new legal framework to deal with challenges actively, so“General Data Protection Regulation“£ ̈GDPR£©was enacted in November2012. Analysis of GDPR background andthe overview of its impact to the world and Chinaare significant for the dialysis of the development trend of the contemporary data protection and the creation of a safe and reliable onlineenvironment.
The Design and Application of All-Areas and Best Traversal Algorithm Based on Uniform Points on Scene Check
Authors: Lv Wei
Published: August 2014

How to improve the efficiency of scene management is that the power workshop of Hangzhou Cigarette Factory seeks direction hardly at all times. What is a supervisory mechanism of scene management that the scene check is an important part of the advanced PDCA cycle. This paper introduces the uniform method to scene area through experimental design. We propose a uniform distribution of the plaid-point method, and we may integrate and optimize the each area, in order to achieve the full coverage on areas. The method uses the principle of uniform, it uses the each area as a series of distribution, formed the most optimized model. Finally, we compare the best value of all local-best point, that is considered to obtain the all local-best results about the problem on certain extent. This arithmetic has written the calculated program, given the calculated example, and the result proved the method is feasible.
The Legislative Reference on Software Vulnerability of Foreign Critical Infrastructure
Authors: He Zhi Le , Zhong Li Bo
Published: August 2014

The software vulnerability is the main app roach for propagating virus, Trojan and bad information. It seriously blocks the effective circulation of IT products and breaks the normal operation of critical infrastructures. The software vulnerability has become one of the main factors threatening the critical infrastructure safety. So it is of great importance on understanding the software vulnerability and perfecting relevant legislative system to research the concepts, characteristics and foreign related laws of critical infrastructure software vulnerability.
Theoretical Framework for Innovation Design with Optimised Customization
Authors: Wang Huan Huan , Yang Qing Ping
Published: August 2014

Design is the core of innovation activity, and it aims to establish better and comprehensive qualities of products. It is also a process to explore and enhance the human experience. During decades of exploration and practice, designers have developed many effective design methods and methodologies. However, users always have more needs and higher expectations. How will the human needs develop in the future? What will the future design is? This paper discusses the relationship between the development of human needs and the process of product evolution, explores the future design trends and presents a theoretical framework for innovation design with optimised customization.
Research of State Assessment for UAV Based on FAHP
Authors: Gu Ze Yang , Li Xiao Min
Published: August 2014

In the assessment subsystem of the UAV health system ,the analytic hierarchy process method is used to build up a UAV performance assessment model,and to analyze and determine each factor and subordinate degree affecting UAV system performance or conditions. For the UAV monitoring and inspection data that are quantitative,the data are assessed and scored by the fuzzy AHP method,while for the extent of the data that are non-quantitative,the data will be directly assessed and scored according to the expert system. On the basis of comprehensive analysis and calculation,the scores of safety,durability and serviceability of each section of the UAV can be achieved and the weighted factor method is then used to finalize the grades of the health conditions of the UAV. With all methods mentioned above,the real-time assessment of the health conditions of the UAV is realized and scientific bases of decision-making for maintenance and management of the UAV are thus provided.
Simulation Modeling of Post-Earthquake Vaccine Cold-Chain Emergency Transportation Based on ExtendSim
Authors: Yu Hong Yan , Zhang Ran , Li Sheng Yan
Published: August 2014

Emphasizing the emergency state of post-earthquake epidemic and delivering sufficient quantities of vaccine to the affected areas in time cast a great significance on prevention and control of epidemic. This paper focuses on optimization problem of anti-epidemic vaccine cold-chain emergency transport processes. In the first place, we construct and optimize transport processes with the help of vaccine cold chain logistics theory. Then we assume WenChuan Earthquake as background, with an example of health and epidemic prevention work of the earthquake-stricken city and the surrounding county of A (X County), and utilize ExtendSim to establish the model. Results show that at the same period, cold chain of optimized ‘Network Parallel’ supplies almost forty times as many as former type of ‘Tandem’ does in delivering vaccine to earthquake-stricken places and that optimized cold chain maintains homeostasis.
Based on Solidworks and Mastercam Combined for Rub a Drum of Four-Axis NC Machining Programming Research
Authors: Ye Xuan Lin
Published: August 2014

Through the whole process of the design and manufacture of the product of rub a drum machine in the Solidworks and Mastercam software, the author proposes modeling parts and blanks by Solidworks software. Meanwhile fits together assembly module of parts and blanks by Solidworks, and then imports the graphic data to Mastercam software, using the basic method of NC programming by the layer from the part contour line and realizing integration technology form design to manufacturing. The combination of Solidworks and Mastercam means the practicability and innovation of application of NC machining technology. The method is simple and practical, especially for the most engineering and technical personnel to use.
Design of a Type of Lift Coating Machine
Authors: Li Ze Lun , Huang You Jun , Deng Xian Ling
Published: August 2014

Designed a type of lift coating machine including its structure, hardware system and software system. The lift coating machine we design is a kind of wet coating equipment, which has some advantages such as lift speed, lift height, impregnate time, multilayer coating, continuous and adjustable deposition interval time. It does not need complicated vacuum environment, easy to be achieved in real life. In addition, it has no special requirements for coating matrix, which can run stably and significantly improve the precision and efficiency of coating. The lift coating machine we designed is suitable for the coating process of all solid materials such as silicon wafer, wafer, glass, ceramics, metal and so on, and it has extensive potentials in the coating market.
A New Method for Testing the Asphere Surface with a Liquid Crystal Spatial Light Modulator
Authors: Fan Di
Published: August 2014

Due to the special properties of asphere lens, the testing of it is more difficult than that of spherical lens. In this paper, the development of a new method using the liquid crystal spatial light modulator (SLM) to measure the accuracy of an aspheric surface is presented. The surface form was measured using a new component as the compensator lens in conjunction to provide an interferogram representing the aspheric form deviation from the nominal. Interferograms are decoded using a spatial-carrier phase shifting technique. The interferometric data is compared to data obtained using a contact stylus profilometer. The system can be mounted over a polishing machine and used for on-line testing of aspheric mirror surfaces.
Design of Injection Mould for the Special-Shaped Claw Cover of an Automatic Breast Pump and Milking Machine
Authors: Liu Xiao Peng , Zheng Xin Jian
Published: August 2014

The technological process for the structure of the injection mould and forming the claw-shaped cover are introduced. The structure with a double-slanted slide was used for the mould to realize automatic inner-pulling and reposition. The cores for forming claws were taken out artificially. The production efficiency of the claw-shaped cover has been increased.
Keywords: injection mould; claw-shaped cover; double-slanted slide; inner core pulling
Development of the Assistant Positioning Device of Parallel Machine Vice
Authors: Song Zhi Dong
Published: August 2014

parallel machine vice is a type of general fixture, it has some defect for positioning for machining work piece need to be completely fixed. We designed a type of assistant positioning device for parallel machine vice to ensure complete positioning of work piece. The device can be easily and conveniently installed on the guide rail of a parallel machine vice, which keeps the generality of the machine vice and improves its performance. It features new structural design, easy to be processed, easy for use and optimized working efficiency and can be classified as a type of assistant positioning device of machine fixture with integral advantages economical efficiency and practicability.
Dynamic Modeling of Shaking Table Based on Simulink/SimMechanics
Authors: Liu Wei Bo , Guan Guang Feng , Xiong Wei , Wang Hai Tao , He Jing Feng
Published: August 2014

This essay focuses on a new type 2-DOF shaking table, which is driven by four hydraulic cylinders. Taking 2-DOF shaking table for example, in order to conveniently and rapidly achieve the control system simulation , using Simulink for simulation platform and combining with SimMechanics. Build dynamic modeling in SimMechanics and use Simulink to build servo system. The experimental results show that it can provide the efficient and significant simulation platform to research the control strategy of shaking table.
Dynamics Analysis of a 3-DOF Parallel Mechanism
Authors: Yang Qi Zhi , Zhao Jin Hai , Song Jun Peng , Wang Zhi Huan , Guo Lin Qiang , Yao Bin Bin
Published: August 2014

Based on a 3-DOF parallel mechanism, this paper establishes the dynamic model by Lagrange method, and gets 3 calculation curves of the input driving generalized forces by theoretical calculations (MATLAB) and simulation (ADAMS). After analyzing the results of calculation and simulation, it verifies the correctness of dynamic model and its good dynamic performance. At last, it shows that the input driving parameters have a great influence on the driving generalized force. This paper lays a foundation for driving force design and stiffness analysis of the 3-DOF working platform physical prototype.
A Comparative Study of Neat Epoxy Coating and NanoZrO2/Epoxy Coating for Corrosion Protection on Carbon Steel
Authors: Zhao Xia , Liu Shuan , Hou Bao Rong
Published: August 2014

nanoZrO2was modified by styrene coupling grafting method and then used as an additive to improve the protective performance of epoxy coating. Two kinds of coatings, neat epoxy coating and nanoZrO2/epoxy coating, were prepared and applied on Q235 carbon steel plates. The plates were submitted to salt spray chamber and seawater immersion for 1000 hours to evaluate the corrosion protection performance for these two kinds of coatings. Tafel polarization curves and electrochemical impedance spectroscopy (EIS) were determined to analyze the corrosion behavior of coating/metal system. Scanning electron microscopy (SEM) and photographs were carried out for morphology analysis of two kinds of coatings under different conditions. Results showed a superior stability and efficient corrosion protection by nanoZrO2/epoxy coating. The modified nanoZrO2could inhibit the penetration of corrosive media and then improve the corrosion protection of the epoxy coating on carbon steel.
Effect of the Rudder on the Vibration Frequency of Wind Turbine
Authors: Wei Hai Jiao , Wang Jian Wen , Ma Jian Long , Yang Liu , Dong Bo
Published: August 2014

Based on the finite element theory, an analysis about the changing of rotor vibration mode of the wind turbine with and without rudder at static state, and a research was carried out to study the impact of the rudder on wind turbine vibration frequency during operation condition of a small horizontal axis wind turbine by using Ansys Workbench. The result showed that, rudder vibration mode was the coupling of rudder vibration mode and first order anti-symmetric vibration mode of rotor. With the increasing of rotating speed, wind turbine vibration frequency increased because of the stiffening effect caused by centrifugal force, and the difference of first order anti-symmetric vibration frequency and symmetric vibration frequency was decrease which was caused by the aerodynamic force. At the same time, the changing of the external load had no effect on the vibration frequency of rudder, the reason of that was counterweight of the rudder. When the rotor speed was in the resonance region, rudder vibration frequency was equal to first order anti-symmetric vibration frequency at the rotating speed n=10.91Hz, an obviously resonance phenomenon occurred. The related research could provide some theoretical guidance for the design of small wind turbine rudder.
Horizontal Well Fracturing Optimization Numerical Simulation
Authors: Liu Zhen Yu , Yang Wan Wei , Wang Hu Zhen , Luan Tian , He Jin Bao , Chen Hong Liang
Published: August 2014

Based on the mixed finite element method ，simulated the horizontal well fracturing complex artificial fracture. The article use line elements to describe the horizontal well bore, arbitrary triangle elements to describe the formation. To influence the fracturing horizontal well productivity of artificial fracture parameters are optimized, including the number and fracture length. For different fracture parameters of production dynamic curve carries on the contrast analysis, obtained the different fracture parameters of pressure profile and saturation profile. Research shows that the crack amount and crack length of horizontal well fracturing production dynamic all have obvious influence, but not the bigger the better, there exists optimal value.
Hydraulic Excavator Boom Lightweight Design
Authors: Hu Xiao Li , Wang Jian Hua , Zhang Hua
Published: August 2014

Regarding 20 tons hydraulic excavator boom in an enterprise as the research object, the boom volume was set as an optimized object. According to the dynamic simulation analysis of working device in typical working conditions, constraint conditions including the maximum stress, displacement range and thickness variable ranges of each steel plate, were determined, and the thickness of twelve primary steel plates of boom were selected as design variables. A lightweight design scheme has been developed through the optimization module in ANSYS software, which could decrease the boom weight by 9.7% and the strength and stiffness of optimized boom structure also met the design requirements.
Multi-Objective Collaborative Optimization of Spring
Authors: Peng Yun , Gong Ai Min , Huang Hai Yan
Published: August 2014

A framework for solving the multi-objective optimization problems of spring in multidisciplinary design environment is advised in this paper. Based on the collaborative optimization (CO) algorithm, a new system level objective function is advised to minimize relative value among the structural mass, the height and the natural vibration frequency. The proposed models were demonstrated with a multi-objective optimization problem of a spring. The optimal design of the spring obtained indicates the great potential of decreasing structural mass and vibration level and increasing natural frequency reserve under the constraints. The analysis progress and results show that the model is feasible and well-suited for using in actual optimization problems of spring design.
Numerical Simulation of the Shell Fragments Damage-Field Based on ANSYS/LS-DYNA
Authors: Wu Xiao Ying , Li Fan , Qin Ge
Published: August 2014

Steinberg failure models based on Mott distribution in ANSYS/LS-DYNA was used on the formation of fragments.The forming process of the fragment damage field of the shell was simulated. The mass distribution、spatial distribution and the attenuation law of initial velocity of fragments are analyzed. The shell damage-field may serve as a basis for the future research on power of shell fragment to the targets.
Numerical Simulation Research of Air-Assisted Atomizer Internal Gas Flow Field Based on Fluent
Authors: Li Qiao , Huang Ya Yu
Published: August 2014

The numerical simulation calculation of air-assisted atomizer internal gas flow field is done, the distribution and changes of the nozzle inside flow field total pressure, velocity, and dynamic and static pressure are analyzed. The analysis shows that the total pressure loss is less; due to the effect of gas viscous, the high-speed air flow is formed vortex flow near the outlet nozzle and the mutual influence between the dynamic and static pressure. A new way is supported for optimizing the nozzle structure according to these studies.
Parametric Design of Tapered End Mills with Variable Pitch for Improving Stability
Authors: He Li Lun , Liu Zhi Bing , Wang Xi Bin , Lv Wei Wei
Published: August 2014

For the problems about design and manufacture of the variable pitch tapered end mills, this study proposes a three-dimensional parametric design method of variable pitch mill. Firstly the equation of calculating the optimal angle between the pitch was presented .Considering existing different patches between two cutting edges, helix edge curve and cross-section groove model of tapered end mill were established .Secondly, mathematical expression of ball end teeth for tapered mill was derived, and all points data of tapered mill surface can be determined by established model. Through the graphical representation, the points set are translated into a solid model.
Research on Influence Factors of Landing Gear Retractile Hydraulic System Performance Degradation
Authors: Zhu Wu Feng , Yan Zhong , Xin Qing Wei
Published: August 2014

Simulation model of landing gear hydraulic system is built based on AMESim, several key influence factors of performance degradation of landing gear hydraulic system are analyzed, such as changes of restrictor orifice diameter, initial pressure of accumulator, viscosity and gas percentage of oil , etc. The simulation results bring valuable reference to aircraft maintenance.
Research on the Stress Uniformity of the High Speed Bearing with Heavy Load in Cold Rolling
Authors: Hong Zhe , Sun Bao Shou , Hu Bin
Published: August 2014

An FE model is established on the basis of ABAQUS software for simulating the closed cold rolling process of the high speed TRB (tapered roller bearing) with heavy load. The influences of the feed speed, main roll rotational ratio, and initial angle between two guide rolls on the stress uniformity of the formed bearing rings are studied by evaluating the standard deviation of the Von Mises on all elements in the FE model. The research shows that the stress uniformity of the formed bearing rings decreases with the increment of the feed speed; the stress uniformity increases with the increment of the main roll rotational ratio; and the stress uniformity increases with the increment of the angle between two guide rolls.
Research on Typical Vibration Accelerations of Wind Wheel Changing with Yaw Angle
Authors: Ma Jian Long , Wang Jian Wen , Dong Bo , Wei Hai Jiao
Published: August 2014

Dynamic and static frequency of the rotor about diameter of 1.4m small horizontal axis wind turbine was tested by using PULSE16.1 structural vibration analysis system., through combining the data of static frequency to identify rotor Dynamic frequency using spectrum analysis method. The conclusions found that, at a yaw condition of constant rotor speed, vibration acceleration of axial movement, disc effect and first order vibration of rotor increased with the increase of the yaw angle. The reason was that yaw exciting force which generated by the yaw behavior increased with the increase of yaw angle. At a constant load yaw, vibration acceleration of axial float, disc effect increased with the increase of the yaw angle. At the yaw condition of constant load R=82Ω、R=118Ω and the yaw angle 25°,30°,the acceleration value sharp increased and occurred the machine resonance phenomenon due to the tower instability. First order symmetric and anti symmetric vibration acceleration of rotor decreased with the increase of the yaw angle. The reason was that after the wind turbine yaw, the speed decreased of rotor caused the centrifugal force of the blades decreased, the impact of the centrifugal load changed was far greater than yaw exciting force for the first order vibration acceleration. The study also found that vibration acceleration values of rotor first order anti symmetric was ​​greater than axial movement, disc effect and first order symmetric vibration acceleration values, which shows that stress concentration in root of blade was large and the blade fatigue damage was more serious. This paper related research results can provided a new analytical thinking for rotor fatigue damage or breakage occurred frequently in wind turbine operation process, and may provide a reference for the vibration characteristics of rotor in the process of yaw.
Effect of Mn (II) Ion on Abrasive-Free Polishing of Hard Disk Substrate
Authors: Fang Liang , Lei Hong , Zhao Rong
Published: August 2014

With high requirement setting for hard disk substrate surface quality, abrasive-free polishing (AFP) has attracted more researchers’ attention. In this paper, the influence of Mn (Ⅱ) ion on AFP of hard disk substrate in the H2O2based slurry was investigated. The experiments results show that Mn (Ⅱ) ion can effectively increase the material remove rate (MRR) and improve the planarization of hard disk substrate. Furthermore, the acting mechanism of Mn (Ⅱ) ion in AFP of hard disk substrate was analyzed. The electron spin-resonance spectroscopy (EPR) analysis shows that Mn (Ⅱ) ion in the H2O2based slurry not only can increase the concentration of ·OH free radical, but also can make H2O2decompose to ·O2–free radical. These free radicals can accelerate the chemical etching and increase the MRR of hard disk substrate.
Second-Order Two-Scale Asymptotic Expansions for Thermopiezoelectric Problems in Periodic Structure
Authors: Wang Zi Qiang , Cao Jun Ying
Published: August 2014

In this paper, we construct a second-order two-scale (SOTS) asymptotic expansions for thermopiezoelectric problems in periodic structure by means of construction way. A set of numerical results are demonstrated for predicting the temperature, mechanical displacement and electric potential in periodic structures. It shows that SOTS's asymptotic expansions can capture the 3-D local behaviors caused by 3-D micro-structures well.
Simulation and Test Study of Multidisc Magneto-Rheological Fluid Clutch
Authors: Chen De Min , Cai Qing Ge , Zhang Hong
Published: August 2014

A Magneto-rheological Fluid Clutch (MRC for short) which has a novel and simple structure is designed; the research on the magnetic field distribution is based on the finite element simulation software which is named Ansoft; In order to test the work performance, the electronic torsion testing machine is used for the torque transmission capability and controllability test. The experimental results reveal that the MRC could meet the torque transmission demand of high power machine and response quickly and reliably.