bluuebunny/crossref_metadata_2025 huggingface dataset:
Underwater Acoustic Sensor Network Nodes Targeting and Optimization Strategies
Authors: Zhang Hua , Liu Yu Liang
Published: September 2011

Wireless sensor networks more complex in the marine environment than in terrestrial environments, the independent positioning mechanism can reduce the difficulty of modeling. The study on underwater acoustic sensor network node distribution of two-dimensional and three-dimensional respectively and the establishment relation function of the distance of beacon nodes and unknown nodes which based on in the traditional centroid algorithm idea. Using Taylor series can reduce the complexity computing of nodes who sensitive to energy because of its linear approximation in a manner. Because the genetic algorithm fitness function only interested in building the corresponding function, optimizing the established function. Simulation results show that: it can achieve the nodes self-localization effectively both in two- dimension and three-dimension that the distance formulas between nodes are liberalized by Taylor series and optimized by genetic algorithms.
Strategic Study on Metro Train Comfortableness Based Operation
Authors: He Chao Ming , Li Huan , Fei Guo Sheng , Wang Qiang
Published: September 2011

Reliving the stress of the urban public transport, the metro system is greatly superior to other transport methods on the load, energy consumption, mean drive speed, arrival on time and comfortableness. The passengers comfortable is the important part for developing the train operation strategies. For optimization of the energy, time saving and the passengers comfortableness during operation of the train, the proper objective function is designed. The train operation strategy for meeting the inter-stop passengers comfortableness at the curves was developed and the energy and time savings of the section were combined, and the optimization operation plan for the whole line was designed, to better meet the metro train operation.
Experimental Study on the Tribological Characteristics of Nanometer WS2 Lubricating Oil Additive Based on Engine Oil
Authors: Chen Cheng Bin , Mao Da Heng , Shi Chen , Liu Yang
Published: September 2011

Nano-WS2 (tungsten disulfide nanoparticles)lubricating oil additive, prepared by the nanometer WS2 particulates and semi-synthetic engine base oil as raw materials, was added into Great Wall engine oil with different mass ratio. With a contrast study on these oil samples, the results show that it can improve the extreme pressure, antiwear and viscosity-temperature properties of the engine oil effectively by adding a certain amount of nano-WS2 additive, and the optimal concentration is 2wt%. The oil film strength, sintering load and viscosity index of this lubricating oil is respectively 1.35 times, 1.58 times and 1.05 times as that of Great Wall engine oil. In addition, when tested under the grinding conditions of 392 N, 1450 r /min and 30 min, the diameter of worn spot reduces 0.018mm, and the average friction coefficients of friction pairs decrease 16.3%, both of which are lubricated by the oil containing nano-WS2 additive. Meanwhile, the experiments testify that the tribological and viscosity-temperature properties of the nano-WS2 additive are better than that of the Henkel MoS2 additive.
Study on MCU Based Programmable Frequency Detector
Authors: Zhang Zi Yi , Zhao Lin Hui , Tan Miao Miao , Guo Hong Hong
Published: September 2011

An MCU based programmable frequency detector was developed and relative tests were carried out. The detector used few elements which are very common and cheap, one MCU which has only 8 pins and with small dimension, one Schimidt trigger, one D type flip-flop and several resistors and capacitors. Cost for the detector is very low. Besides hardware work, software program has played very important role in the detector. By adjusting program parameters, different frequency can be detected and detecting band width can also be adjusted. Program flow chart is given in this thesis. Test shows that the detector is stable and sensitive and is suitable for different applications, e.g. over power line data transmission, etc. This paper introduces theory of the detector, hardware design and the software programming.
Simulation and Control about Arrival and Aerobraking on Neptune
Authors: Liu Bin Yang , Liu Wei Fang
Published: September 2011

Being a fuel-saving technique, aerobraking has become increasingly popular in aeronautic industry and planetary exploration. It has been used in Mars missions by NASA.To realize aerobraking on Neptune, we started with the general situation, and obtained equations that can be universally applied based on fluid mechanics, celestial mechanics and kinematic. After captured by Neptune, the orbit of the spacecraft degenerates from the initial elliptical orbit to the final circular orbit due to many aerobraking passes through Neptune atmosphere. Based on the analysis about the general situation and reasonable assumptions, it was possible to calculate and describe the orbit after each time of aerobraking. Moreover, the relation between total durations and incidence angles was discussed based on the sensitivity and was fitted as a 6-order polynomial.
Research on Feature Extraction Based on Vibration Phase Diagram and its Application in Roller Fault Diagnosis
Authors: Tang Yong Hui , Zhang Hong Ying , Lin Guo Xiang
Published: September 2011

A technique of feature extraction based on vibration phase diagram for roller of rolling mill was discussed. Basic theory of roller fault diagnosis based on vibration phase diagram was presented, causes for phase diagram under different conditions was analyzed and a method of computing the eigenvalue for distribution density matrix was provided. To same one roller vibration under identical environment, the cooperation of phase point probability distribution is only relelation to the density of probability distribution, and unconcerned with noise. It is also different to phase point distribution density of different states. A experiment was conducted on ψ500×2 shrewd roller of rolling mill, the feature of roller signal was extracted based on vibration phase diagram and chose Hidden Markov Model (HMM) to build and identify mould. The experiment shows that this system has better identification rate, and proves that this technique is effective.
Amplitude Control of Limit Cycle in Chua System
Authors: Xu Fu Lin , Liu Su Hua
Published: September 2011

The control of amplitude of limit cycle emerging from the Hopf bifurcation in Chua system under a nonlinear feedback controller is investigated in this paper, Explicit nonlinear control formulae and amplitude approximations in terms of control gains derived from the center manifold theory and normal form reduction present a convenient approach to obtain an effective analytical control and predict the amplitude of limit cycles in Chua system. The calculating simulations indicate that the approximate solutions are in good agreement with the numerical solutions.
Double Error Function Decision Feedback Momentum Blind Equalization Algorithm
Authors: Xing Li Kun , Wu Long , Guo Ye Cai
Published: September 2011

Against the shortcomings of slow convergence and large residual error in norm decision feedback blind equalization, double error function decision feedback blind equalization algorithm based on orthogonal wavelet transform momentum (WT-DMCMA-DFE)was proposed. In the algorithm, the four combinations of two error functions, respectively, to make adjustments on the former right and the feedback right, and add momentum algorithm to the former right and the feedback right to accelerate the convergence rate, escape correlation by using the orthogonal wavelet transform and normalize the energy to further improve performance of the convergence. Underwater acoustic channel simulation results show that convergence performance and mean square error of WT-MCMA-DFE, WT-H-HMCMA-DFE, WT-H-CMCMA-DFE is different.
One Kind of High Precision Non-Contact Displacement Sensor and its Application
Authors: Li Xin , Chen Yu Rong , Wang Sheng Huai
Published: September 2011

In this article, one new non-contact displacement sensor and its principle has been introduced; it is based upon improved Foucault focus detection and equipped with diffraction grating measuring system. Driven by piezoelectric actuator instead of voice coil motor and diffraction grating metrology system being adopted, the non-contact displacement sensor avoids non-linear error and other measurement error caused by the movement of the voice coil motor and therefore has higher measurement accuracy, which has be proved by series of experiments. During measuring the workpiece surface contour profiles, piezoelectric actuator drives focus object lens to make vertical displacement, and ensures focus in every sampling interval to go to the workpiece surface. In the mean time the focus error signal can be set to zero. The sensor has large range and high resolution, which can be applied in profile measurement. This non-contact displacement sensor resolution can reach 10nm.
The Robotic Force Tracking Based on Single Input Fuzzy Adaptive Controller
Authors: Li Er Chao , Li Zhan Ming
Published: September 2011

In order to realize precise contact tasks with an unknown environment, robotic force controllers have to adapt themselves to the unknown environment. In this paper, an effective controller for robot contact tasks is proposed using sliding mode switching surface as a sole fuzzy input variable for substituting the feedback controller in the model reference adaptive control (MRAC), the fuzzy force controller determines the adjustment to the position control loop, adjust the fuzzy controller parameters according to the difference between the actual and desired force responses. There is a sole fuzzy input variable in fuzzy logical controller(FLC), the total number of rules is greatly reduced compared to conventional FLC, hence generations and tuning of controller are more simple and easy. Simulations prove that the excellent adaptability as well as high precision is obtained by the proposed strategy.
Path Planning of a 6DOF Humanoid Manipulator
Authors: Cui Yu Jie
Published: September 2011

Based on kinematics analysis, this paper introduces polynomials interpolation for path planning of a 6DOF humanoid manipulator based on kinematic models. The cubic and quintic polynomials interpolations are used for interpolation algorithm. The simulation experiments show the correctness and feasibility of the algorithm and the quintic polynomial is superior to the cubic polynomial.
Design of Control Circuit for Needle-Selected Mechanism of Knitting Machines
Authors: Hu Guo Jun , Feng Fang , Zhao Wei Qiang
Published: September 2011

The needle-selected technology is one of the key one for the control system of knitting machine. Based on the analysis of the structure and principle for the needle-selected mechanism, the drive circuits of the needle-selected device are designed to ensure the stability when knitting machines run. Additionally, this paper presents the discussion of the software design for needle -selected technology, which provides a theoretical reference for the research and development of the control system.
Design of Magnetic Fluid Sealing Device and Computer Simulation in Sintering Machine
Authors: Bai Ming Hua , Liu Qing Rong , Zhou Hong Liang
Published: September 2011

This paper, based on magnetic fluid dynamics, combined with the air leakage of sintering machine, proposes a new type of magnetic fluid sealing device in sintering machine. According to the sealing mechanism of MHD as well as Bernoulli equation, the sealing theory--pressure difference equation in static sealing by magnetic fluid is deduced for the actual model of sintering machine. By using ansys finite element simulation software, the two-dimensional numerical simulation of thermal magnetic- coupling inside of sealing device is set up, the effects of different temperature on the magnetic properties are analyzed and the best sealing performance is found, that is when the edge temperature of the sealing device is controlled from 30°C to 80°C.
The Motion Analysis of Traditional Belt Type Sintering Machine
Authors: Bai Ming Hua , Wang Li Jun , Ren Su Bo , An Li Bao , Gao Jun Nian
Published: September 2011

The sprocket wheel and pallet cars of industrial sintering machine utilize the gear and pin rack gear meshing to drive focused on the defects of velocity fluctuation and arching during running process, motion features for sprocket wheel and pallet cars line were analyzed. In this paper, based on virtual prototype motion simulation, using ADAMS simulation software, the regulars of motion which are the velocity and acceleration of the upper and lower pallet cars line and the angular velocity of tail sprocket wheel were analyzed. And then, the reasons of velocity fluctuation have been found. Simulation analysis results are consistent with the actual situation. We obtain the movement rule of traditional type sintering machine. Study results can provide the theoretical basis which can be used to solve the problems of velocity fluctuation in future.
Influence of Vibration on Automotive Interior Decorations Volatile Formaldehyde
Authors: Yu Juan , Jiang Fan
Published: September 2011

In order to study the influence of driving on automotive interior decorations volatile formaldehyde, the JX-3B vibration sensor calibration of sine excitation simulates car vibration. The concentration of the volatile formaldehyde is measured in the static and dynamic, combined with the indoor air quality detector and the JX-3B vibration sensor calibration. The results of experiment contrast show that the driving and stop of car has influence on decorations volatile formaldehyde. The concentration of decoration volatile formaldehyde with vibration is lower than the stationary, and concentration with the change of time also is not the same as the stationary. The experiment results of car interior decorations volatile formaldehyde can provide basis for the next research, and the reference for research of other scholars.
The Extracting System Design of Small Dim Targets in Complex Background
Authors: Liang Dong Sheng , Liu Zhao Hui , Liu Wen
Published: September 2011

For the moving small dim targets in visible image sequences with low SNR and complex background, whose contained characters are simple and poor, they are extracted difficultly. This paper proposes a new method to detect and extract positions of small dim moving targets. According to the features of moving targets, in a very short time interval, the target trajectory is considered as a straight line approximately. Firstly, it makes use of threshold segmentation methods to extract the positions of targets in each frame, then building the motion line equations after the joint of multi-frame processing results. Finally, the position of small dim targets are detected out and extracted, and false targets are eliminated accurately. Hardware system was designed and the algorithm is implemented on hardware systems successfully. The experiment results show related functions of the system and extracting algorithm is feasible, the system is stable and has a strong process ability, which can effectively detect and extract small and dim target in complex background correctly.
Developing Mechanical-Electrical-Hydraulic Integrated Equipment Based on Application Ability Training
Authors: Zhao Wei Min , Zhu Xu Xia
Published: September 2011

Based on the accumulation of knowledge and the improvement of skills, application ability is the consequence of the comprehensive application of knowledge and is required for all the engineering and technical talents.In this paper, knowledge structure and capacity requirements for mechanical engineer was described, and according to the weakness in comprehensive application ability of the mechanical engineer major students, the basic design idea of mechanical-electrical-hydraulic integrated equipment was proposed, and action of the equipment for training application ability was demonstrated by introducing its characteristics.
System Evaluation of Construction Operations in View of Ergonomics
Authors: Dong Ya Wen , Zhang Bao Feng , Liu Wen Hui
Published: September 2011

Probing into the industry characteristics of construction operations and the necessity to make ergonomic improvement for construction operations, this paper analyzed the current research situation of the literature both at home and abroad which apply ergonomic principles to make improvement in construction operations. This study shows that the existing research on ergonomic improvement of construction operations mainly focus on construction safety and specific operations improvement, at the same time, the system research on the ergonomic improvement of construction operations is less. Making a China's leading internationalized construction service company as the object of empirical research, this paper designed the evaluation index system of construction operations’ man-machine-environment system from three factors of human, machine and environment. And applying the Fuzzy Comprehensive Evaluation Method, the paper evaluated the validity of the man-machine-environment system. At last, aiming at the evaluation results, some improvements were given in view of Ergonomics.
Simulation of the Main Engine Remote Control System for Marine Education and Training
Authors: Chu Zhong , Sun Ming
Published: September 2011

Training simulator is a necessary equipment for modern navigation education to accords with the demands of the STCW78/10 convention. A new type of simulation training system for main engine remote control has been successfully put into use for chief engineer’ training, which is the main part of the modern marine engine room simulator recently developed by Qingdao Ocean Shipping Mariners College and Dalian Maritime University. The simulation system, the simulated object of which are the Autochief 4 remote control system, the main engine with the type of MAN B&W 10L90MC and the pneumatic maneuvering system, has good simulation effect due to accurate mathematical models, nice human-machine interfaces and abundant troubles to shot. This paper introduces the innovative design, the plentiful functions of the simulation system and the application of IT.
An Application and Analysis for Regulation of Hydraulic System
Authors: Sun Wei , Fan Cheng Yan , Sun Zhi Peng
Published: September 2011

In the actual application of the hydraulic system, a system often can’t be fully realized the design requirements, or some performance indicators are below the expectations of the system design. From some analyses, sometimes the reason is not a hydraulic system design, but the problem of regulation of the hydraulic system.It is frequently encountered problems in the hydraulic system of actual work that hydraulic system right regulation. Based on analysis of the hydraulic system by combined machine tool, hydraulic system of hydraulic elevator and special machine tool, explaining that the regulation of hydraulic system is essential to guarantee design requirements of system, reducing power loss, raise transmission efficiency and the further improvement for work properties. It should be paid sufficient attention to the regulation of system when the hydraulic system is running.
Performance Evaluation of Telecom Equipment Maintenance Outsourcers Based on Statistical Distance with Weight
Authors: Zhou Yong Jie , Cui Nan Fang
Published: September 2011

It’s important to control telecom equipment maintenance outsourcers’ performance in outsourcing decision-making process by selecting the proper evaluation indexes. This paper sets up a new comprehensive evaluation method based on statistics distance with weight to assess outsourcer’s performance. Ten indexes are choosed to determine which are good service providers from the ability and effort degree of their work, including failure rate, failure loss, service level, maintenance price, management fee, arrive time, repair time, customer relationship, maintenance engineer and tool machine. Each index has its own expert’s weight. We classify different service grades and calculate the real distance of every maintenance outsourcer by Euclidean distance. Then the performance of each equipment maintenance outsourcer can be inspected from the calculation result. Through the application in telecom company we testify its advantages compared with other evaluation methods.
Research on Entrepreneur Spirit Cultivation and Construction
Authors: Xu Da Yong
Published: September 2011

As a social entrepreneurship spirit capital is an important component of economic growth and the development of the enterprise, is the source of enterprise nature influence key, it belongs to high level enterprise culture category, in improving the social economic growth, promoting social development shows the importance of increasing unprecedented. As the competition pattern of change, cultivate the spirit of the entrepreneur has become a topic of concern. In this, this paper expounds the connotation of the spirit of the entrepreneur, the entrepreneur should have the quality, the entrepreneur spirit on the economic development of the important role, and then concrete analysis the current lack of entrepreneurial spirit, and the reasons and analysed from three aspects the influence factors of the entrepreneurial spirit, finally from seven aspects, points out that the spirit of the entrepreneur to cultivate and constructing method.
A Globalizing Manufacture and Information Sharing System Based on Network Platform
Authors: Yang Xin , Ding Shan Ting
Published: September 2011

The features of globalizing manufacture are national boundary has been broken and the production of enterprise boundary was also breakthrough. An information sharing system based on SQL Server and JAVA is proposed. Firstly, tasks and goals of the project are determined. The main contents of the cost model based on Microsoft Excel proposed by the American factory are analyzed. A new model is built by incorporating the cost of labor and transportation cost into the original cost model. Build of PC database and design of software are discussed in the paper.
Recent Development of Vibration-Assisted Abrasive Machining
Authors: Han Guang Chao , Li Bo
Published: September 2011

Vibration-assisted machining (VAM) combines small-amplitude vibration with different machining process to improve the process fabrication quality. It has been applied to a number of machining processes, such as turning, drilling, grinding and polishing. The emphasis on this literature is the vibration-assisted abrasive machining (VAAM), which involves with finishing and grinding processes where VAAM have been applied to hard metal, brittle material and complex geometries products like optical molds. This paper presents different vibrating units in VAAM from tool vibration to workpiece vibration, which also includes different vibrating paths from linear to ellipse. Typical hardware systems used to achieve these vibratory motions are described too.
Products Information Inheritance Based on Object-Oriented Technology
Authors: Wang Yan , Ai Qing Song
Published: September 2011

In the process of product creative design, we advanced the conception of Product Gene (PG) as a result of the thought of genetic engineering applied to product design. In this paper, an effective PG coding method is put forward based on the actual requirement of product information inheritance. Then a Function Surfaces (FS)→Parts→Products configuration system is established based on this coding method and the Object-Oriented technology is adopted to realize product information inheritance. Finally, the paper offers an example of the design of a spurgear to prove the feasibility of our method.
The MOSFET Model with an Anti-Parallel Diode as a Power Switch
Authors: Jing Tang , Chang Daniel T. , Zhao Chang Hao
Published: September 2011

In practice a MOSFET is anti-parallel with a diode. In the paper there is a method how to build its model. The model applies for the MOSFET works as a power switch. The model consists of two capacitors, a voltage-controlled switch and a diode. There is an example for the model building. The circuits including the model are simulated. The results prove that the electrical data of model equals basically its actual data. The model can help electrical engineers design circuits which uses MOSFET as a power switch. The model built only need the data of its manual. The merit is very suitable for electrical engineers.
Study on Application of Critical Path to Project Time Management
Authors: Dai Li Xin , Li Zong
Published: September 2011

Most resources used in a project will have an easily determined cost. We need to know which staff members can work on which parts of a project and what needs to be done, and when. Project time management should be broken down, step by step, just as other parts of the project are broken down in the planning phase. This will help make sure that everything is done when it needs to be, and to keep the project from going over its budget because it went well past the time scheduled for it. A project manager often need to control the whole time of the project and grasp the key process in those tasks which can shorten the period and reduce the cost. This paper discusses the algorithm of AOE-net in the critical path and its application to evaluate the completion time in the network planning of project time management.
An Algorithm for Best-Fit of a Pattern of Profile Features to the True Profile
Authors: Liang Shuang , Li Ming , Yang Hui , Zhao Xing Fu
Published: September 2011

In industrial metrology, measurement and assessment of standard profile features such as planes, cylinders, cones, etc. is an important part. Many algorithms for fitting and noise-reduction of range data from single feature have been proposed. However, according to the definition of workpiece or requirement of drawing, best-fit operation of a pattern of profile features to the true profile should be taken, which requires considering several different features as a whole to fit to the true profile. Currently there’s not so much papers related with this problem. On basis of algorithms for fitting of single profile feature and noise reduction methods, an algorithm for best-fit of a pattern of profile features was presented in this paper. Since it is a nonlinear optimization problem, a method of finding initial estimates was also related in this paper, which is also helpful for the fitting of single cylinder, cone and other standard quadric surfaces.
Study on Intelligent Manufacturing System Model of Iron and Steel Enterprises in Ubiquitous Information Environment
Authors: Liu Jun Wei , Kong Jian Yi , Zhou Min , Wang Xing Dong , Xiong He Gen , Li Gong Fa
Published: September 2011

To meet the development of ubiquitous information environment and improve timely response efficiency of iron & steel enterprise, combined with characteristics of steel manufacture industry and its automation and informatization, an intelligent manufacturing system (IMS) of iron & steel enterprise based on the multi-dimensional ubiquitous information space is proposed. The system architecture is studied from two different aspects: systems business function aspects and intelligent manufacturing technology in ubiquitous information environment. From the perspective of local soft reconfiguration, reconfiguration method and self-organization mechanism of iron & steel enterprise IMS in ubiquitous information environment is studied.
The Green Design for the Moving Device of the Silt Coal Load Machine
Authors: Mao Ping Huai , Zhai Bing , Chen Run Dong
Published: September 2011

Nowadays environmental issues facing society is one of the three major problems, the deterioration of the environment for human survival and development is caused a serious threat. The design of moving part of the silt coal loader is confined to traditional design but seldom considering the environmental elements. Through the analysis of the silt coal loader walk part of traditional design pattern characteristics and existing problems, from the angle of impact on environment, puts forward the green design thought. Based on the green design thought, all of the part of the loader should be respectively designed detailed. The design includes material selection, recycling design, disassembling design, etc. The loader can realize the purpose of protecting the environment and saving resources by the green design, according to the requirement of sustainable development. The applications of green design improve the product quality and economize resources, and make products to green environmental requirements.
The Design and Size Optimization of the New FCEV Subframe Based on Hypermesh Platform
Authors: Liao Jun , Shan Lan , Feng Yan
Published: September 2011

The establishment of FCEV finite element model of the subframe is based on Hypermesh platform, and a new subframe structure is designed in accordance with the stiffness and strength analysis on the original subframe in all conditions. High-strength steel materials are used to optimize the design of this new structure, which result in the optimal size. Through the comparative analysis of the strength, stiffness, mode shape and quality on new subframe and the original one, it is verified that the design of the new subframe is reasonable and feasible.
SPH Method Based on Bird Impact Numerical Simulation of Aircraft Engine Fan
Authors: Hou Bing Duo , Xu Ying , Yang Jun Hu , Peng Lang Cao
Published: September 2011

The traditional numerical methods about calculation of bird strike problems are Lagrangian numerical method and Euler method. However, the existence of the finite element mesh distortion and the problem of insufficient accuracy appeared respectively. In this paper, the SPH meshless method applied to simulate bird strike aircraft engine fan, by comparing the simulated data and experimental data to test the accuracy of the simulation about bird hit the fan that is used SPH method .And by comparing the SPH method and traditional methods of bird strike problems in the time step to prove the superiority of the SPH method.
Modeling and FEM Analysis for Interference between Tool Shank and Shrink Fit Toolholder
Authors: Jiang Fu Lin , Liu Zhan Qiang , Liu Gang
Published: September 2011

The mechanism of shrink fit toolholder has been analyzed through theoretical modeling and finite element modeling. The performance of shrink fit toolholder mainly depends on the interference value that provides enough clamping force. Interference value between tool and shrink fit toolholder includes two separate parts named as initial interference and compensatory interference. Both types of interference and their related influencing factors are described firstly in this paper. The theoretical model for shrink fit toolholder is then developed. Finally, finite element method analysis is carried out to verify the developed theoretical model. The centrifugal force and environment temperature generated in machining process should be specially paid more attention to as the spindle rotation speed grows faster.
Study on Contact Force of Tooth Profile Modification
Authors: Ma Yong , Huang Qi , Lou Zhi Feng , Li Ke Hong
Published: September 2011

Linear, conic, cubic, and sine relief curve are compiled and established in MATLAB, on which gear models are built in UG and a new method of establishing relief gear models is proposed in this paper. Based on the theory of elastic, contact method is used on the proposed finite element models of gears by software LS-DYNA. Total contact force of teeth face, contact force of single tooth and equivalent stress on relief gears in different cases are obtained. The results show that contact impact existing in meshing between teeth of gears is ameliorated, contact force of tooth face and equivalent stress is reduced. The effect of cubic and sine relief curve is the best. So dynamic simulation on relief gears has great significance for reducing contact force between teeth faces of gears.
Based on Ansys Drillwell Hook DG450 Strength Analysis
Authors: Yu Hua Li , Mu Xi Qing , An Mei Ling
Published: September 2011

Researching and analyzing the static characteristic of the hook that functions at the limited load has an important meaning to design larger tonnage hook correctly. Academic analysis structure-strength is implemented on the hook of drillwell DG450. Firstly, based on the characteristic modeling technology, the 3-D entity model of the hook is built used Pro/E. Secondly, the static analysis on three dangerous work condition at ultimate load of the hook is proceeded by FEM software Ansys. The stress and displacement are gained to specify the stress status at the different work condition of the hook. And find out the most dangerous place where the stress is the largest. Important academic elements and data for study and design are provided. The conclusion reference values to design hook and drill safely and prolong the lifetime of drillwell hook.
A Research on the Measurement of Friction Coefficient of Plastic Forming by Floating Die Extrusion
Authors: Xin Xuan Rong , He Cheng Song , Shan Long Long
Published: September 2011

A new measurement of friction coefficient which is more applicable to overload extrusion technology is proposed in this paper. It determines the friction coefficient of overload plastic forming by firstly determining the load mutation of friction by a floating die experimental device. It is proved in this experiment that the friction coefficient in extrusion process can be precisely determined and the effectiveness of lubricating can be evaluated objectively by this new method which is easier to understand and master than the theory that determines the friction coefficient by ring upsetting.
Research on Logistics Management Information System
Authors: Wang Qing Jun , Guo Cheng Liang
Published: September 2011

Logistics has been an integral profit source of modern social economy due to the booming Logistics industry & service. Logistics Management Information System (LMIS) has been created as integrated information system in response to the calling for the requirement of advanced technology to organize and process the information accompanied during Logistics operation for efficiency and smoothness of Logistics management and business process. This thesis comes up with a LMIS plan suitable for Logistics industry development by carrying out detailed analysis of present situation of management and further research on LMIS.
Study on Extension Functional Integration and Benefit of Electric Vehicle
Authors: Zhou Yu Hui
Published: September 2011

Through the extension of functional analysis of pure electric vehicles, electric vehicles, charge and discharge are presented potential operational benefits, including: clean energy platform for grid peak load shifting, emergency energy and energy storage devices and other effects, the benefits of electric vehicles through the establishment of model quantitative answer to the new energy environment of cost recovery sources of electric vehicles, electric vehicles for the development of new energy obtained solutions.
Microstructural Characterization of Ni-Al Alloyed Layer under Laser Rapid Solidification Condition
Authors: Yang Yue , Wu Hua
Published: September 2011

Nickel layer electroless deposited on aluminum substrate was alloyed by Nd-YAG pulsed laser irradiation. Solidification microstructure was characterized through cross section, showing typical microstructure that were located in upper and middle melted zone and interface of melted pool and substrate, respectively. The microstructure was analyzed by transmission electron microscopy (TEM). Followed by the observations, the eutectic growth process was analyzed.
Study on Method of Overcoming Adverse Effects of Radar Blind Zone on Large Fleet in the Three Gorges Reservoir
Authors: Xie Shi Ping
Published: September 2011

The completion of the Three Gorges reservoir makes it possible for a fleet with 10, 000 tons or more to proceed directly to Chongqing though the Three Gorges reservoir area. The potential vessel collision risks should be highlighted to large fleets in the Reservoir arising from dead area in the radar blind zones. The analysis of radar blind sectors is of help to overcome the adverse radar conditions and take adequate actions such as piloting, maneuvering, etc. to avoid collisions risks and navigation in radar blind areas.
Power Batteries Pack Test System Based on GPIB Protocol
Authors: Lv Li Ya , Min Yong Jun
Published: September 2011

A communication and data collection device was designed based on GPIB protocol, with the design of PC control and automatic measurement software, which can complete programmable electronic load control and ambient temperature data acquision, implementation of new energy vehicles for the automatic measurement of battery pack and Data records, simplifying test system design. The results show that the system operation and reliable performance, advanced features, can realize the new energy vehicle power battery pack automated testing of complex working conditions.
A Simulation Study on Translational Piston Air Compressor
Authors: Geng Kui Hua , Tang Meng , Yu Hong Dong , Geng Ai Nong , Du Shi Guang
Published: September 2011

The structure and working principle of a new translational piston compressor was introduced in this paper. Its piston works in a way of translational motion, hence reduces the piston’s relative velocity to cylinder and cap, as well as friction and wear. In order to avoid vane detaching from piston, simulations were carried out regarding the pre-tightening spring and an optimal preload of the spring was obtained. By analyzed and compared to conventional rolling piston compressor in term of contact force between vane and piston, it was pointed out that the new compressor possessed advantage of kinetic characteristic and is more suitable for the situation of high rotary speed.
The Use of Rapid Prototyping to Fabricate Liver Tissue Engineering Scaffold
Authors: Sekou Singare , Zhong Shou Yan , Sun Zhen Zhong
Published: September 2011

In this papers, the authors described a rapid prototyping method to produce vascularized tissue such liver scaffold for tissue engineering applications. A scaffold with interconnected channel was designed using CAD environment. The data were transferred to a Polyjet 3D Printing machine (Eden 250, Object, Israel) to generate the models. Based on the 3D Printing model, a PDMS (polydimethyl-silicone) mould was created which can be used to cast the biodegradable poly (L-lactic-co-glycolic acid) (PLGA )material. The advantages and limitations of Rapid Prototyping (RP) techniques as well as the future direction of RP development in tissue engineering scaffold fabrication were reviewed.
Influence of Slide Stroke Curves on Deep Drawing of Box Shaped Part
Authors: Xu Teng , Xia Qin Xiang , Zhang Sai Jun , Li Zhen Shi , Ruan Wei Ping
Published: September 2011

In order to explore the influence of slide stroke curves on drawing process and solve the problems of springback and serious thickness thinning during forming, the deep drawing processes of box shaped part based on the conventional mechanical press and servo press were simulated. The springback and thickness variation of box shaped part by different slide stroke curves were obtained. It shows that comparing with the deep drawing with conventional mechanical press, the springback of drawn workpiece decreases by pressure-keeping drawing; the maximum thickness thinning ratio of drawn workpiece is smaller by staged drawing, and the distribution of workpiece thickness is more uniform.
The Development and Utilization of Nuclear Power from the Perspective of National Economic Security
Authors: Min Ze Hao
Published: September 2011

The Japan Fukushima nuclear crisis upgrades global discussion about the development and utilization of the nuclear power while provides experiences and lessons for the development and utilization of China's nuclear power. From the perspective of national economic security, the essay deals with the development and utilization of nuclear power for the purposes and giving some suggestions on developing a strategy to protect national economic security, building national economic security system.
Causes of Cracks of External Wall Insulation
Authors: Ouyang Chen Bing , Chen Ying , Wang Yi
Published: September 2011

With construction of the growing amounts of energy saving buildings, there are defects cracks in external wall insulation because of lack of construction and management experience. The purpose of this study is to find out main causes of cracks of external wall insulation covered by ceramic tile, to conduct construction industry to control engineering quality by paying attention on them. On basis of document study, field investigation to construction workers, supervisors, project managers, both material and construction causes of cracks are studied by investigation and designed questionnaires, including 32 detailed reasons and their harmful levels. Meanwhile, the base data from them is analyzed, and Pareto charts of causes of crack are drawn accordingly. The result shows that grid cloth and plaster mortar are the main material reasons, and that plaster mortar construction, grid cloth laid, detail treatment, configuration of plaster mortar are the main construction reasons.
Value Optimization of the Existing Public Building Energy-Saving Renovation Based on AHP and Improved VE
Authors: Yu Hui Gang
Published: September 2011

Based on the analysis of VE theory and energy-saving features of the project, the paper proposes an improved VE application model for existing public buildings energy-saving renovation. It introduces the time factor and expands the "function" extension to study the value optimization problem with a broader vision on the basis of the original theory. Considering from the comprehensive benefits of energy saving renovation, it builds a comprehensive evaluation indicator system by using AHP and further establishes an improved VE application model to evaluate the renovation programs to realize value optimization. Finally, empirical analysis is presented to verify the feasibility and scientific.
Study of Acoustic Emission of Wheel Passivation for Cermet Based on Super-Speed Grinding
Authors: Guo Li , Du Hou Bin , Sheng Xiao Min , Peng Ke Li , Jin Tan , Wu Yao
Published: September 2011

In this paper, there are two kinds of material (cermet and cemented carbide) to be used. Different grinding conditions were performed for evaluation of RMS of acoustic emission(AE) signals and understanding the effect of each grinding parameter on AE RMS during grinding process. A kind of on-line monitoring method based on wavelet analysis and acoustic emission was raised and the nonlinear relation model between AE RMS,wavelet energy coefficients and wheel passivation state was built. During the process,the wavelet analysis method was used to decompose the original signals for extracting wavelet energy coefficients. The results of experiments indicates that AE RMS increases with increasing table speed;The corresponding relation between AE RMS and table speed is good and could take the table speed as the main parameter for studying wheel passivation state. As a result, the nonlinear relation model can monitor the wheel passivation degree on-line accurately through training. This provides a kind of viable method which has very high practical value for confirming the wheel dressing cycle.
Determination of Residual Stress of Hard Film/Soft Substrate Specimens via Unloading Results of Nanoindentation Tests
Authors: Nguyen Huu Hung , Wei Pal Jen , Lin Jen Fin
Published: September 2011

A method used to determine the residual stress in a hard film deposited on a soft substrate via the unloading load-depth curves was proposed. The unloading curves with transitional behaviors were used to determine the film deflection stiffness, and then the residual stresses were obtained. Significant extra stresses were induced by a cube corner indenter at large depth. In contrast, the indentation-induced stresses could be neglected in cases of Berkovich indentation at relatively small depths.
A Design of Forming Dies for a Manifold of Airbag Inflator
Authors: Lin Heng Sheng , Tsai Sheng Chi , Hsu Yuan Chuan , Hsiao Ming Che , Ke Chia Chou , Lee Bean Yin
Published: September 2011

The manifolds of airbag inflator were used to be produced by sheet-metal forming. It comprised at least eleven forming stages to achieve its final shape. Uneven wall thickness and poor dimensional accuracy were the common defects because the planar anisotropy of sheet-metal caused earing on the cup rim. In this study, the cup-shape workpiece is obtained from backward-extrusion of billets, followed by two stages of end-forming of tube and three stages of hole-piercing. During the end-forming production, the tool life of the first forming stage was the most severe because it applies close-die forging to increase its rim thickness. Therefore, in addition to the design of prestressed die insert, special attendance is paid to the partition of the die insert to further alleviate the stress level. The optimization of die insert was aided by the finite element analysis of DEFORM software. The results show that by lowering the parting line, the stress level can be minimized. The tool life can therefore be improved.
Thermal Shock Performance of Al2O3/TiO2 Air Plasma Spray Coatings
Authors: Yao Sun Hui , Su Yan Liang , Kao Wen Hsien
Published: September 2011

This study aimed to understand the effect of TiO2 content on the thermal shock performance of Al2O3/TiO2 air plasma spray coatings. Three kinds of commercial feedstock powders were used, i.e. Al2O3, Al2O3-13wt%TiO2 and Al2O3-40wt%TiO2. The resulting coatings were studied in terms of micro Vickers hardness test, XRD, SEM and thermal shock test. The last was conducted using a water quenching method. The results showed that both the coating hardness and thermal shock performance decreased with the TiO2 content.
Study on Advantage for Exploring Thin Sandwich by CPTU
Authors: Tang Yan Chun , Meng Gao Tou
Published: September 2011

Based on analysis on the difference between the single and double bridge Cone Penetration Test and CPTU, through CPTU application research on the determination of soil type on Pearl River Delta, the advantage on exploring the thin sandwich by CPTU has been studied. The existence of thin sandwich on soft soil is important on design and construction of soft subgrade, and must be identified strictly on the exploration process; associated with the total cone resistance-penetration depth curve and the pore pressure-penetration depth curve on the determination of soil type, especially on the distinction between the sand soil and clay soil, the accuracy of CPTU is higher than the single or double bridge Cone Penetration Test; based on CPTU application research on Pearl River Delta, the determination of soil type by CPTU can be more accurate than the drilling way, and the advantage for exploring thin sandwich by CPTU can be more various. The achieved result can provide a foundation for further study for CPTU application research on engineering exploration.
Heat Analysis of a Flat Permanent-Magnet Linear Synchronous Motor
Authors: Mou Xiao Jie , Xu Yue Tong , Jiang Feng Jun
Published: September 2011

The heat of linear motor affects normal operation of the motor seriously. The accurate computation of temperature field will provide a theoretical foundation for the design and control of linear motor. A three-dimension thermal model of linear motor is created in this paper. As the linear motor is running back and forth in an adjustable speed, the mean effective current of linear motor can be calculated firstly. On this basis, the calorific value of windings is calculated. The heat transfer coefficient of linear motor in each surface is calculated when the linear motor is running in a low speed. Then the steady state temperature field of the flat linear motor is simulated by the finite element software ansys.