bluuebunny/crossref_metadata_2025 huggingface dataset:
Innovative Design of Home Appliances Based on Function Integration
Authors: Yang Mei , Zhang Xin , Song Zi Yi , Ding Ning
Published: October 2011

Innovation is the key to the success of an enterprise. The innovation in products can make enterprises more competitive. The product function is the essential part in consumers’ demand for products. As a new trend of innovation in products, function integration plays an increasingly prominent role in the innovation design of products. Based on the essence of the innovation design--market demand, this paper analyzes the status and practical application of function integration in product innovative design, especially in the design of home appliances. The design trend of function integration in home appliances is also summarized. In the end, function integration is applied to the innovation design of heater practically, which is more humanistic and closer relationship between people and products.
Innovative Methods on Product Appealing Design
Authors: Qi Na , Zhang Xun
Published: October 2011

The emotional demand of modern consumers is analyzed and it is pointed out that products based on appealing design will be widely accepted and needed by people. Under the consideration of design originality and availability, five innovate methods are concluded to instruct the product appealing design which are bionics design on product shape or character of bionics in shape, idiographic design of materials, fun character during using experience, artistic character of market positioning and the feasibility of product customization. During the dissertation of above innovative methods, some excellent products are exampled to enlighten and verify the research conclusions.
IPv4 and IPv6 Coexist in Unified Threat Management
Authors: Huang Kuo Hsien , Wang Chang Fan , Wang Chien Chung
Published: October 2011

IP is the primary protocol that establishes the Internet; it is responsible for routing packets across network. IPv4 is the first version of the protocol to be widely deployed. IPv4 uses 4 bytes addresses, which limits the address space to more than 4 billion possible unique addresses. All of network devices construct on the IPv4. While the Internet widely deployed and used. IP addresses are being incrementally delegated to end users, an IPv4 address shortage has been developing. IPv4 addresses were insufficient for the Internet. IPv6 provide 2128 address and provide sufficient IPs for the Internet. But now the software and devices are only supporting IPv4. In this paper, we developed a new UTM appliance. The proposed system considers the integration of IPv4 network and IPv6 network in the Internet.
A Description Method for MSER with SIFT Descriptor
Authors: Fan Xiao Hu , Lin Wei Ting , Cao Juan , Li Ben Ling , Si Yan
Published: October 2011

Maximally Stable Extremal Regions are robust to complex affine distortion and illumination changes between reference image and real-time image. On the basis of deeply research on the SIFT descriptor, this paper propose a description algorithm for MSER using SIFT descriptor. The Second central moment is used in the algorithm to make ellipse adjustment for each irregular MSER. Then a self-adaptable rectangle area, whose side is proportional to the minor axis of the ellipse, is constructed encircling each ellipse centre. Finally, a SIFT feature vector is formed to express the MSER, after processing the statistic characteristic of all pixels’ gray gradient in the rectangle aero. A reasonable range of a self-adaptable rectangle area side is presented in the paper. Matching experiment results show that our algorithm is highly distinctive and stable.
Research and Simulation of Working Mechanism of Small Shaper
Authors: Wu Ying
Published: October 2011

For being convenient for researching the dynamic characteristic and the improvement and use of small shaper, for improving the dynamic technical performance, the three-dimensional solid model of working mechanism was established with ADAMS. Each part of the model in ADAMS was set up. Simulation analysis on the working process of working mechanism was achieved. The structure optimization parameters of working mechanism were obtained. The result proves that the lengths of crank and rocker are almost no impact on the fluctuation range of ram speed. The location of revolute joint between rocker and frame has less impact on the return speed and acceleration of ram. The location of revolute joint between crank and slider impacts greater on the fluctuation range of ram speed.
Application of Conjugate Cam Design Software Platform in Die Cutting Platen Press Mechanism
Authors: Shi Xiang Dong , Shen Shao Hua , Chai Cheng Wen
Published: October 2011

The design of the conjugate cams was analyzed in this paper, and the calculation process of conjugate cams profile data to meet the pressure angle and the curvature radius was introduced in detail. With VB as the software platform, the curves data of the conjugate cams were designed and calculated, the curves were also displayed on the platform. Base on the designing platform, the motion parameter of the followers, such as displacement, velocity and acceleration, could be achieved and saved in the certain format. The parameterization design and motion analysis were also could be performed to help the designer to find the mistakes, such as the rotation difficulty caused by excessive pressure angle, the motion distortion and overcut during machining caused by small radius of curvature. So the mistakes could be corrected and the product developing cycle could be shortened. The system could accomplish the information transmission and information sharing among the subsystems and enhanced the integration and automation of the conjugate cam design and manufacture. It also could be taken as platform for designing, manufacturing and performance researching of the conjugate cams. Finally, the example of the moving platform die-cutting mechanism in an automatic die-cutting machine verified the usability and effectiveness of the software platform.
Adsorption and Dispersion Characteristics of Superplasticizer with Waste Plexiglas (WPS) on the Surface of Gypsum Particles
Authors: Zheng Gang , Wang Ru Min , Zhao Gao Yang , Yu Xiao Jiao
Published: October 2011

A superplasticizer (WPS) was synthesized from waste plexiglas and sodium allysulfonate in this paper. Poly (methyl methacrylate-co-ethyl acrylate) grafling sodium allysulfonate (PMMA-g-AS) was prepared through reactive extrusion in self-single screw extruder and hydrolysis reaction. The structures of the WPS was characterized by FT-IR spectrometer. The results show that structure of the WPS are clear. By using UV-visible adsorption spectrophotometer, micro-electrophoresis potential analyzer, and X-ray photo spectroscopy, the adsorption characteristics and surface electrochemical properties of WPS were studied in comparison with traditional naphthalene sulfonated formaldehyde condensates (FDN) whose dispersion ability mainly depends on electrostatic repulsive forces. The results indicated that the adsorption behavior of WPS on gypsum particles follows a Langmuir isothermal adsorption model with an adsorption heat of 18.79 kJ/mol and an adsorption layer thickness of 17. 52 nm. Adsorption isotherm suggested that Langmiur single layer adsorption occurred during the process of adsorption of WPS and FDN on gypsum particles.
Passenger Volume Estimation Based on the Relational Model of Visual Density for Elevator Group-Controlled System
Authors: Liu Tun Dong , Chen Jing , Jiang Hao
Published: October 2011

The uncertainty of passenger volume is the bottleneck of modern elevator group-controlled system, which influences the optimization process of group control and depresses the control performance. This paper presents a novel passenger volume estimation method. According to the specific conditions of an elevator, background subtraction is used to gain the visual density. And then the relational model of visual density is obtained with the system identification. By considering the status inside elevators, the directions of passenger movement, and the number of waiting passengers, this model offers effective parameters to elevator group-controlled strategy and guarantees the real time of control system. Compared with the traditional Hough transform detection, the method in this paper is an easy and efficient way to learn dynamic traffic by analyzing passenger traffic of elevator group-controlled system.
Research on the Meter Coefficient and Simulation Analysis of a New Swirlmeter
Authors: Li Hua Zhi , Liang Qian Chao , Cui Han Guo
Published: October 2011

The configuration of a new swirlmeter is designed. The hollow cylindric fluid axial-symmetrically in cylindric pipe is analyzed, and then the algebra expression of meter coefficient is deduced. An impeller of swirl generator attaching to a specimen of swirlmeter is designed according to the deducing process. Simulations and experiments test the method of measuring flowrate by measuring the rotation frequency of ball is feasible. Comparing the results of simulations and experiments with that of algebra expression derived from deducing in theory the maximal error is 7.8%. At last, the reasons resulting in the errors are discussed which the next researches will continue to minus the errors. The conclusion will be applied in designing the impeller of swirl generator and measuring the flow by the new swirlmeter.
Statistical Analysis of Fatigue Crack Growth Threshold Based on Test Data
Authors: Liu Wen Lin , Kong Guang Ming , Mu Zhi Tao , Jia Zhong Hu , Yu Da Zhao
Published: October 2011

Statistical analyses on fatigue crack growth threshold under three different stress ratios have been done. By the stratified random sampling theory and the weighted least square fitting method, the test data were analyzed based on Paris crack growth rate formulation. The statistical results of the fatigue crack growth threshold under different stress ratios were obtained by linear fitting method. The results show that the fatigue crack growth threshold is influenced by stress ratio R significantly. In the slow crack growth area near the threshold, the increase of stress ratio leads to the decrease of threshold and the increase of crack growth speed. The threshold results under different stress ratios satisfy the normal distribution.
Sales Forecast for Garment Companies with Cluster Analysis and Modified Neural Networks
Authors: Yu Li , Chen Yun
Published: October 2011

For the companies of the garment industry, managers often dedicate their efforts to forecast the sales accurately while making decisions for marketing resource allocation and scheduling. Based on the historical database, this paper constructs a method to investigate the relationship of the relating factors and sales values. The proposed method combines the cluster analysis and modified neural networks to fulfill the sales forecast task. Firstly, the average linkage cluster algorithm is applied to cluster similar sales values. Secondly, a modified neural network is used to investigate the mapping relationship between those influencing factors and the sales clusters. The method employs a self-adjust mechanism to determine the structure of the neural network. The effectiveness of the proposed method is illustrated with a case study of a garment company in Shanghai.
High-Precision Ultrasonic Ranging System Design and Research
Authors: Wen Zong Zhou , Li Fu Ning , Xia Zi Bang
Published: October 2011

Ultrasonic ranging system has been developed base on the ultrasonic reflection principle in the air, ultrasonic wave propagation time in the air was timed by single chip microcomputer and then ultrasonic distance measurement can be realized. This article highlights the system's hardware components, error analysis, and have carried out a detailed analysis and research.In order to realize the high accuracy range finder, this article has designed two kind of standard back plates.The standard back plate had considered all factor which influence range measuring system precision, it does not look like predecessor such to consider the temperature merely the factor, Therefore this article designs the ultrasonic ranging system not only realizes the high accuracy range finder, simultaneously is suitable for each kind complex and the bad environment.
Dynamics Simulation of Capsule Filling Machine Based Virtual Prototype
Authors: Wang Gui He , Zhang Yong Guo , Yu Tian Biao , Wang Wan Shan
Published: October 2011

Capsule filling machine is the key filling equipment for pharmaceutical capsule preparations. Taking NJP3400 type of capsule filling machine as an example, we analyze its principle and characteristics successfully. First, we built its geometric model with Pro/E software, established the equations of motion of transmission mechanism with Lagrange multiplier method and showed the process of solving the equations with GSTIFF software. With the interface module called mechpro of PRO-ADAMS, the model was imported into ADAMS, and then, we analyze the machine’s strength, displacement, acceleration and the association of these parameters.
Study on Control Technique of Dynamic Hysteresis for Active Inverter
Authors: Lin Cheng Wu , Ma Li , Wang Hui Min
Published: October 2011

Based on the circuit topology of the grid-side converter, the control model of the grid-side converter is established, control technique of dynamic hysteresis for active inverter is analyzed, meanwhile, the relationship among feedback currents, the inductance, the maximum given current and the minimum given current, the difference value between DC bus voltage and network voltage is derived. The experimental system with DSP core is developed. Theory analysis and simulation results show that the control technique is feasible, which has some practical values.
Switched Control Strategy for Networked System with Multi-Rate Input Sampling
Authors: Luo Dong Song , Zhou Li
Published: October 2011

In this paper, control problem of networked control system with multi-rate input sampling is considered. By lifting technique, the system is transformed into a single-rate sampling system. Channel transmission strategies for both output and input channel are presented in view of the limited communication capacity. Such strategies lead to a switched system configuration. Then, switched control strategy is implemented and control algorithm that guarantees the stability of the systems is presented.
A Dual Fuzzy Neuro Controller Using Genetic Algorithm in Civil Aviation Intelligent Landing System
Authors: Xu Kai Jun , Zhang Guang Ming , Xu Yang
Published: October 2011

A kind of dual fuzzy neuro control algorithm (DFNC) for civil aviation aircraft intellegent landing system is developed in this paper. The DFNC algorithm uses Genetic Algorithm (GA) as the optimization technique and chooses best control performance of approaching and landing to be the optimization object. Real-time recurrent learning (RTRL) is applied to train the RNN that uses gradient-descent of the error function with respect to the weights to perform the weights updates. Convergence analysis of system error is provided. The control scheme utilizes five crossover methods of GAs to search optimal control parameters. Simulations show that the proposed intelligent controller has better performance than the conventional controller
Modeling and Simulation of Diesel Propulsion System in Maneuvering Navigation Condition
Authors: Wang Hai Yan , Tang Hui Yan
Published: October 2011

All-regime performance simulation of marine diesel propulsion system is an important support for design of control system. An all-regime model for diesel propulsion system is established, including starting, braking, reversing, etc. The dynamic simulation models of propeller running across four quadrants and ship longitudinal motion are given too. A 76000DWT bulk carrier is selected as plant. The simulation results show that steady data of diesel are in good accordance with test-bed data, and dynamic data match to ship sea trial data in crash stop condition. The model is accurate and effective.
Research on the Energy Saving Potential of Official Cars in China
Authors: Liu Quan Le , Chen Wei
Published: October 2011

The quantity of official cars increased with the speed exceeding 20% every year which need much more energy be consumed to meet the official car needs. To investigate the energy saving potential of official cars in China, This paper introduced the strategy method with systemic viewpoint to reduce official cars energy consumption through analyzing the reason of high energy consuming of official cars. The resulted showed that only reduce the quantities and maintenance cost, and decline the displacement and using frequency can realize fuel efficiency of official cars.
Simulation and Control System of Camera Robot
Authors: Zhang Lei , Yan Shi Tian
Published: October 2011

This paper presents simulation method for a new camera robot system. A special mechanism of 7 DOF which allow the robot to work flexibly in variable workspace is designed. The performance of the proposed mechanism is verified reasonable by simulation in Matlab. Additional, control system for the camera robot is presented in this paper.
The Optimal Attitude Controller Design and Simulation of Three-Axis Dual Rotor Helicopter
Authors: Xu Cai Zheng , Zhang Ting
Published: October 2011

In this paper, the model of three-axis dual rotor helicopter is built, through a new motor control algorithm of real-time grouping, the decoupling and independent control of pitch, yaw and roll channels is realized; then the “dead zone” is introduced to design the attitude controller on the basis of the optimal control law which minimize the weighted sum of response time and energy consumption, to achieve optimal control of the attitude of the helicopter; finally, the simulation model of the attitude control system is established in the MATLAB/Simulink environment. Simulation results show the feasibility of the optimal attitude controller design.
Analysis of OCR Design and Implementation for GUI Modeling
Authors: Wu Yu Mei , Liu Zhi Fang
Published: October 2011

Many efforts have been taken to achieve automated Graphical User Interface (GUI) testing. The most popular way is model-based testing, which supports automated test case generation and execution. But building such a model is a non-trivial task, which usually costs the most work-load in the entire testing process. Most of the approaches about automated model deriving are dependant on the programming language or specific OS. In this paper, we proposed a new approach of GUI modeling using Optical Character Recognition (OCR), and technical poblems encountered have been analyzed in deatail. Case study shows that our approach is capable of analyzing most of the GUI windows, and generating corresponding model and hence eliminates the above constraint.
Error Comparison of Different Acoustic Infinite Element
Authors: Yang Rui Liang , Gao Long
Published: October 2011

On the basis of previous studies, various shape function and weight function of infinite element are researched and summarized into eight methods, and then various infinite element methods can be summarized as general equation, the condition number of various infinite element methods is researched to judge the merits of infinite method. Surface error of selected methods versus frequency and the node number are calculated in this paper. Finally, relatively optimal infinite element methods are summed up according error comparison, which helps to apply appropriate infinite method to solve boundary-value problems on unbounded domains.
A Photovoltaic MPPT Strategy by Modified Fuzzy Control
Authors: Fu Bo , Yu Lu , Cheng Qiong , Cai Xin Chen , Xing Xin
Published: October 2011

Maximum Power Point Tracking control method based on traditional fuzzy algorithm has disadvantages of slow response and unstable output. To solve the problems, a modified fuzzy control algorithm by combining the traditional two-dimensional fuzzy control with a time-delayed feedback is proposed. It not only fast responds to the changes in ambient environment but also has good stability. Simulation results show that the proposed algorithm has superior performance to the traditional fuzzy control.
Research on the Marine Corrosion Model of Ferrous Metal Based on PLS and Grey Relational Analysis
Authors: Zhang Xiao Yu , Zhang Hui Yan
Published: October 2011

The marine corrosion of metal materials is a complex chemical process which is affected by multiple factors that are nonlinear interconnected. This paper aims at integrating PLS and Grey theory in the model building of corrosion time， rate，maximum corrosion depth and average corrosion depth based on small sample data measured in a certain marine environment. The result shows that the time of data，temperature，salinity，dissolved oxygen，ph value and humidity are strongly correlated with the maximum corrosion depth in the full immersion zone. The fitting effects of PLS modeling based on grey relational analysis are better than the PLS model and the GM (1, 1) model in both precision and stability.
Research on Ultra-Low-Bit-Rate Speech Coding Algorithm for Underwater Speech Communication
Authors: Li Ye , Jiang Jing Sai , Ma Xiao Feng
Published: October 2011

Underwater speech communication for middle-long distance has the characteristics of narrow bandwidth as well as low transmission rate, which makes the underwater speech communication much difficult. Nevertheless, speech communication based on storage and transmission makes it feasible. The paper introduced the principle of speech communication based on storage and transmission firstly and then analyzed the terminal buffer size as well as the communication delay when such technique was applied. The feasibility along with localization is pointed out in conclusion.
Solutions of Single Point of Failure in Intrusion Detection System
Authors: Cai Yan Jing , Cheng Xian Yi , Pan Yan
Published: October 2011

In this paper, Mobile Agent (MA) and a number of intrusion detection system described. Considering the shortcoming of the current intrusion detection system, a new system called the intrusion detection system based on MA was described. Using the autonomy of MA, Intrusion Detection System based on MA avoids single-point failure, and robusts the system. As a result, the security of network has been increased.
Spline Function Method Analysis Nature Frequency of Annular Foundations
Authors: Gao Xiu Yun , Jing Ru Xin , Song Jian Hui
Published: October 2011

The foundation style of such construction as liquefied oil storage tank and environmental protected reaction pool is mostly annular foundation. In the paper, the annular foundation will be put on WINKER foundation, and then the annular foundation will be simplified as a curve beam, the cubic B spline functions as displacement functions of curve beam. The dynamical equation and the nature frequency of annular foundation based on the instantaneous principle of minimum potential energy, and put forward Spline Function Method to solve the nature frequency of annular foundation. Numerical examples are provided to demonstrate the simplicity and effectiveness of the present method. The results are in good agreement with experimental data.
Variance Based Identification of Phase Transition in Duffing Oscillator for Weak Signal Detection
Authors: Chang Yuan , Li Chun Wen , Hao Yi
Published: October 2011

This paper studies the detection of weak signal detection using a Duffing Oscillator, which is sensitive to periodic signals but insensitive to noises. The system transits from chaotic to great periodic motion when coupled to the weak periodic signal to be detected. To efficiently determine the phase transition, a novel numerical criterion is proposed based on the sharp increase of variance when phase change happens. Simulation results verified the effectiveness of this method.
Adiabatic Shear Fractures and Fragments of Cylindrical Structures under Internal Explosive Loading
Authors: Ma Li , Hu Yang , Xin Jian , Deng Gui De
Published: October 2011

Adiabatic shear band (ASB) is a typical response of materials under high strain rate loading. Based on the instability analysis of the thermo-viscoplastic constitutive model, a new rate-dependent failure criteria is proposed, which links dynamical evolution of ASB with macro mechanical critical conditions, and is successfully applied to account for the shear fracture mode of cylindrical structures subjected to explosive loading. Using finite element method, the transient failure procedure and shearing fragments induced by ASB is simulated, and the calculated fracture profile shows a good agreement with the experimental results. The failure analysis indicates that the rate-dependent failure criteria, as well as impulsive loading, govern the shear damage mode of the structures.
Granular Structure Merging Algorithm Based on Category Theory
Authors: Li Hong , Ma Xiao Ping
Published: October 2011

In order to solve the problem of conversion from the finer level of granularity to the coarser level of granularity, this paper proposes a formal method for Granular structure merging based on category theory. Firstly, it takes the granular structure as the granular object and the granular structure mapping as the granular morphism, then the granular object and the granular morphism compose the granular structure category. Secondly, it uses the granular morphism and the granular pushout to achieve the granular structure merging , then gets the granular structure merging algorithm (GrSM). Finally, the author illustrates the method with the concrete examples, which solves the granular structure merging issue. This method has a solid mathematical foundation and methodology, which is worth further study.
Research on the High Temperature Properties of Sasobit Warm Mix Asphalt Mortar
Authors: Ye Song , Guo Bin
Published: October 2011

Using the Dynamic Shear Rheometer (DSR) to do the dynamic viscoelastic properties test for asphalt mortar which added Sasobit, to analyze the G*/sinδ trends of asphalt mortar and warm mix asphalt mortar, then to get the high temperature stability of warm mix asphalt mortar. The results indicate that following the increasing of filler-bitumen ratio the G*/sinδ value of warm asphalt mortar is decreased when the temperature is the same; The G*/sinδ value of asphalt mortar with Sasobit than not, show that Sasobit can be increased the high temperature stability of asphalt mortar.
A New Referenced Signal Detection Method Adaptive to Multi-Objective Control of Active Power Filter
Authors: Liu Gui Ying , Su Shi Ping
Published: October 2011

That the control objectives of active power filter are diversified is an import measure to improve application efficiency of active power filter. This paper puts forward a new referenced signal detection method based on generalized orthogonal transformation, and expatiates of the basic theory of generalized orthogonal transformation and detection principles and their realization methods of all kinds of referenced signals. Finally, simulative results are given. Theory analysis and simulative results show validity of the proposed detection method.
A Novel Corner Detection Based on Improved SUSAN Model
Authors: Yang Zhi Hui , Han Xiao Lan , Guo Fang Fang
Published: October 2011

The paper proposes a novel corner detection algorithm based on classical Susan model. The improvement is given from two aspects. One is the choice of the self-adaptive threshold. The other is that we present a rotate coordinate system to find all possible corner points. Experiment result shows that the modified algorithm is robust and of high efficiency.
An Adaptive Wavelet Shrinkage and its Application in Image De-Noising
Authors: Cao Tian Jie
Published: October 2011

In this paper an adaptive method of shrinkage of the wavelet coefficients is presented. In the method, the wavelet coefficients are divided into two classes by a threshold. One class of them with the smaller absolute values at a scale is transformed with a proportional relation，another class with the larger absolute values at the same scale is transformed with a linear function. The threshold and the coefficient in the proportional relation or in the linear function are determined by the principle of minimizing the Stein’s unbiased risk estimate. In the paper, the method of estimation of the threshold and the coefficient is given and the adaptive method of shrinkage of the wavelet coefficients is applied to image denoising. Examples in the paper show that the presented method has an advantage over SureShrink from the point of view of both the Stein’s unbiased risk estimate and the signal-to-noise ratio. In addition, the method takes almost the same computing time as the SureShrink in image denoising.
An Image Hided-Data Detection Method Combining Markov Chain and Support Vector Machines
Authors: Zhao Hui Min , Zhu Li
Published: October 2011

An image hided-data detection method is proposed combining 2-D Markov chain model and Support Vector Machines (SVM) by the paper, in which image pixels are predicted with their neighboring pixels, and the prediction-error image is generated by subtracting the prediction value from the pixel value. Support vector machines are utilized as classifier. As embedding data rate being 0.1 bpp, experimental investigation utilizing spread spectrum (SS) and a Quantization Index Modulation (QIM) method data hiding method respectively , correction detection rates are all above 90% . For optimum LSB method ,the method achieves a detection rate from 50% to 90% above with 0.01bpp-0.3bpp various embedding data rates.
Development of Fault Diagnosis System for Telemetry Equipment Based on the Virtual Instrument Technology
Authors: Lai Biao , Jia Hui Qin
Published: October 2011

A fault diagnosis system based on the Client/Server mode is developed, which realizes the purpose of diagnosing the Telemetry Equipment placing on the station address through local or IP network. And the fault method uses the fault tree to describe the logic relation between fault nodes. And the fault tree is realized by virtual instrument. The signal acquisition module uses PXI architecture, the interactive user interface is develops under LabVIEW graphical software and the data storage uses SQL server database platform. The developed fault diagnosis system can realize the functions of information management on instrument and fault node, fault detection or location, and device remote control. Now this system is used in test area, which improves the telemetry equipment maintenance rate.
Multi-Robot Control System Based on Wireless Network
Authors: Huang Wu Xin , Tan Shi Li , Li Yi Qin
Published: October 2011

A designed network control system of multi mobile robot is presented. It is based on wireless distribution system. One or more mobile robot and some other devices are connected via wireless network to form a network control system. More than one wireless node is provided in order to realize distribution wireless network and extend the coverage range. The hierarchy control structure is used in the robot control system. It is optimized by the features of the network control system especially in time delay. By testing the time delay in different network environment, the performance of the whole control system can be proved.
Dual Mode Braking System Design of a HEV
Authors: Luo Yu Tao , Sun Qing Yong , Tan Di
Published: October 2011

Hybrid electric vehicle (HEV) is a good approach to solve the energy shortage and emission pollution issues and regenerative energy braking (REB) is one of its prime approaches for fuel saving. In this paper, a regenerative-electro-hydraulic braking system called dual mode braking system (DMBS), is proposed. The braking-by-wire technology is adopted for automatic electric control and cooperating with regenerative braking. This system can be easily converted to traditional hydraulic braking in case of fault occurs in the electro-hydraulic subsystem or some other reasons. The architecture is achieved with as less modification as possible of the original electro-hydraulic braking system. And the control strategy based on automobile braking regulations of the Economic Committee for Europe (ECE) is brought forward. Some simulations under given initial speeds and driving cycles are carried out to evaluate the effectiveness and REB efficiency. The simulating results indicate that the DMBS can work properly and can achieve a relative good performance on braking distance and regenerative energy.
H∞ Control of Flexible Joint Robot via T-S Fuzzy Model
Authors: Wang Feng , Liu Xiao Ping
Published: October 2011

In this paper, a H∞ control approach based on T-S fuzzy model for flexible joint robot is proposed. First, the Takagi and Sugeno (T-S) fuzzy model is applied to approximate the flexible joint robot. Then, a fuzzy controller is developed based on parallel distributed compensation principle (PDC), and H∞ performance is employed to restrain the influence of modeling error caused by variety of stiffness. The stability conditions for the flexible joint robot control system are proposed by Lyapunov function. Finally, the simulation results are given to show the effectiveness of the proposed method.
Presentation, Implementation and Application of a High Speed Hamming Distance Generator
Authors: Shan Bao Tang , Wang Yu Sheng
Published: October 2011

To save resources and improve speed of the frame synchronization system, one resources-saving, high speed and robust hamming distance generator design method, i.e., bit-integrated full stream line wallace tree method, is presented. By contrast studies with bit-extended wallace tree method, whose performance is better than the others’ in several documents, our method not only saves resources obviously, but also can work on higher data rate. Bit-integrated full stream line wallace tree method is implemented and simulated on FPGA. Finally, it is used in a high speed frame synchronization circuit of a satellite communication system.
Dynamics Simulation of Beam-Carried Cranes Based on Virtual Prototyping
Authors: Liu Kai An , Li Qiu Ju
Published: October 2011

Firstly this paper introduces the flexibility theory of virtual prototyping. Secondly a virtual prototype of rigid-flexible coupling model for beam-carried cranes is built, based on collaborative simulation platform by using the software of UG, ADAMS and ANSYS. Finally the response curves of the displacement for the girder’s centroid with step load and different frequency sine load were analyzed by virtual prototyping simulation. And the corresponding second-order system transfer function is given through the system identification. The result of simulation provided some theory basis for the structure design and optimization of beam-carried cranes.
Optimal Maintenance Interval for Wind Turbine Gearbox
Authors: Deng Meng Na , Yu Yun Hai , Chen Liang , Zhao Hong Shan
Published: October 2011

A maintenance interval optimization model for wind turbine gearbox considering the maximization component profit per unit time was presented in this paper. First, the principle and configuration of gearbox were introduced, and the failure characteristic is analyzed as well as the failure rate distribution of components in gearbox. Then, the concept of component income coefficient λ and element utilizing rate per unit time U(t) were given. λ describes the proportion that component takes up the total income of wind turbine electric power sale，and U(t) represents the average income per unit time to wind turbine electric power sale during 0~t. Based on above two concepts the model of optimizing maintenance interval was proposed. Last, the paper used the proposed method to evaluate wind turbine gearbox maintenance interval in an actual wind farm. The simulating results indicates that the component profits per unit time for gears, intermediate speed shaft bearings and high speed shaft bearings increases by 16.88%, 30.26% and 32.59% respectively.
Effects of Fillet on Kinematic Characteristic of Internal Gear Couple
Authors: Song Wei , Zhou Hua
Published: October 2011

Internal gear couple is the key component of high-pressure internal gear pumps, kinematic characteristic of which directly influences performance of the pump. Fillet is always ignored in the studies of gear transmission. This paper presents kinematic analysis of internal gear couple by using Adams which takes fillet into account. On the base of simulation results, the effects of fillet on kinematic characteristic of internal gear couple are concluded.
The Selection Model of Equipment Resource Based on AHP and Grey Correlation Analysis
Authors: Wei Jun Ying , Zhong Pei Si
Published: October 2011

This paper mainly researches the problem that enterprises select equipment resource in manufacturing resources sharing system. There are many influencing factors and some are uncertain or unqualified in the selection, therefore this paper using AHP and grey correlation analysis to evaluate and select. Firstly, the selection index system of equipment resource according to AHP is established, and then selection model based on multi-hierarchical grey correlation analysis is constructed. Applying this model to help enterprise select equipment can avoid errors resulted from human objective cognition difference and equalitarianism. The select result is more scientific and reasonable, and more in line with the enterprise requirements.
Electrochemical Properties of Highly Ordered TiO2 Nanotube Arrays as an Anode Material for Lithium-Ion Batteries
Authors: Wang Li Li , Zhang Shi Chao , Wu Xiao Meng
Published: October 2011

Well-aligned TiO2 nanotube arrays were fabricated from anodization by a subsequent heat treatment. Rate performance and electrochemical properties of TiO2 nanotube arrays were studied intensively. The electrode exhibits excellent rate capabilities at various rates with an average coulombic efficiency reaching 95.6%. It is obvious that TiO2 nanotube array possesses high rate capability and excellent cycling stability.
Application of Su-Field Analysis Method to the Innovation of Decision-Making
Authors: Fan De Lin , Hu Jian Wei , Yu Hui Ling
Published: October 2011

Innovation of decision-making needs systematical methodologies. A systematical decision “Element-Thought” method (“E-T” method) is proposed based on Su-Field analysis methodology of the Theory of Inventive Problem Solving (TRIZ) for the innovation of decision-making. The way to analyze and solve innovation problem of decision-making with “E-T” method is given. The result shows that the proposed method could help managers make decision effectively, efficiently, and creatively.
Error Compensation of 3-Axis Magnetoresistive Magnetometer
Authors: Ding Li Bo , Zhang He , Liu Jian Jing
Published: October 2011

To eliminate errors of 3-axis magnetoresistive magnetometer, according to its offset errors, sensitivity errors and non-orthogonal errors which specialty was considered, an error compensation model of magnetoresistive magnetometer was established. And the calculation method of the error compensation model, which did not need accelerometers, was proposed to correct the magnetometer errors. The results show the algorithm of error compensation model decrease the root mean square error of the magnetometer from 413nT to 82nT. Thus the 3-axis magnetoresistive magnetometer could fast and accurately measure the geomagnetic field.
The Electronic and Magnetic Properties of Chemically Decorated Boron Nitride Sheet
Authors: Zhou Qing , Jiang Wei , Kuang An Long , Yuan Hong Kuan , Chen Hong
Published: October 2011

The electronic and magnetic properties of the boron nitride (BN) sheets with different chemical decoration are investigated using the first-principles plane-wave calculations within density functional theory (DFT). It is demonstrated that bare BN sheets are nonmagnetic semiconductors with wide band gaps, and a metallic–semiconducting–half-metallic transition with a nonmagnetic– magnetic transfer can be realized through chemical decoration. Specifically, BN sheets modified by H with zigzag configuration still behave as semiconductors, while with armchair configuration are metallic. Nevertheless, decorating BN sheets by F or OH with zigzag configuration reveal half-metallic properties, then with armchair configuration present spin-polarized semiconducting characteristics. The results may be of importance in designing BN-based electronic devices for nanoelectronic applications.
Preparation of Tetragonal and Hexagonal Calcium Zincate
Authors: Li Song , Zhou Yuan Yuan
Published: October 2011

Tetragonal and hexagonal calcium zincate as an active material in Zn/Ni secondary battery has been successfully prepared with precipitation transformation method by isothermal in the reasonable concentration of KOH as base solution for the first time. The chemical composition of Ca [Zn (OH)3]2•2H2O was confirmed by X-ray powder diffraction pattern 、TG-DSC and infrared spectroscopy. These results all show that perfect crystal shape of either regular tetragonal or hexagonal calcium zincate (regardless of crystal size) should always have the same chemical expression of Ca [Zn (OH)3]2•2H2O as its form; and incomplete crystal shape of calcium zincate prepared in different conditions , their chemical expression may be the form of Ca [Zn (OH)3]2•nH2O(n=1~2).
The Evolution of Free Electron Density during the Interaction between Femtosecond Pulse and Lithium Niobate Crystal
Authors: Tan B.Y. , Zhang Shuang Gen , Zhang Z.W. , Jiang S.B.
Published: October 2011

The nonlinear ionization process was discussed in detail induced by femtosecond pulse in Lithum Niobate (LN) crystal. The MPI provides “seed” electrons for avalanche ionization process, and avalanche becomes significant when the density of electron created by MPI over 1020 cm-3. Recombination process leads to an obvious drop of electron density and then a dynamic equilibrium is achieved between the generation of electron and the recombination process, and the density is dependent on the incoming field.
Study on the Friction and Wear Behaviors of Cu/PTFE Self-Lubricating Composites
Authors: Xie Ting , Xu Zhen Xing , Yan Zhao Ming , Chen Gang , Jiao Ming Hua , Yu Jian Wei , Yin Yan Guo
Published: October 2011

The friction and wear behaviors of PTFE composites filled with irregular or spherical copper powders were experimentally investigated. The effects of shape, content and size of the copper powders on the tribological properties of the PTFE composites were discussed. The results showed that the friction coefficients of the PTFE composites filled with irregular copper powders are higher than that of pure PTFE. While the friction coefficients of the PTFE composites filled with spherical copper powders were almost always lower than that of pure PTFE. Both irregular and spherical copper powders can effectively decrease the wear of the composites. The wear of the composites filled with spherical copper powders will gradually decrease with the increase of the content of copper. But the effect of the content of irregular copper powder on the wear of the composites was not so obvious. The friction coefficients and wear depths of the composites increase with the decrease of the Cu size. The increase amplitudes in friction coefficients and wear depths of the spherical Cu filled composites are smaller than those of the irregular Cu filled composites.
Preparation of TiO2/CNTs Nanocomposite and its Photocatalytic Activity for Methyl Orange in Aqueous Solutions
Authors: Zhang Xuan Hui , Hu Su Juan , Tong Shao Ping , Cheng Yuan , Chen Dan , Li Guo Hua
Published: October 2011

TiO2/CNTs nanocomposites with different Ti/C molar ratios were prepared by a sol-hydrolysis method at 368 K, using titanium tetrachloride as a precursor and nitrified carbon nanotubes as a support. The crystal phase, morphology and microstructure of the sample were characterized by X-ray Diffraction (XRD) and High-Resolution Transmission Electron Microscope (HRTEM). The photocatalytic activity of the samples was performed by methyl orange in aqueous solutions under UV light.The supernatant liquid of methyl orange during degradation was determined by using an UV-vis spectrophotometer (UV-vis). XRD results show that the crystal phases of the sample are composed of carbon nanotubes, anatase and rutile. HRTEM results show that the average diameter of oval titania is about 4.2 nm, and it decorates on the surface of carbon nanotubes uniformly. UV-vis results show that the photocatalytic activity of the TiO2/CNTs nanocomposite with the optimum Ti/C molar ratio is much higher than that of P25. These results indicate that a synergistic effect exists between titania and carbon nanotubes in the nanocomposite.
Research to Blasting Vibration Distribution of an Open Pit Mine Based on Wavelet Packet Theory
Authors: Yang Yi , Sun Wei , Li Shu Fen
Published: October 2011

As mining production developing, the deformation is gradually increasing in the northwest side of the surface mine. The blasting vibration of daily production is influence on the slope. Through decomposing, restructuring and analyzing the blasting vibration signals of different elevations and explosion distances, we got that the seismic wave energy was mainly distributed low frequency range, usually less in 20Hz and that with the explosion distance increasing, the high-frequency signal energy would be lost, especially when low-frequency signal energy below 10Hz low-frequency become into the main part of the energy. As explosion (center) distance increases, the signal energy is concentrated in the low frequency. Whereas, with the elevation increasing, the seismic wave energy will move to high frequency and has a homogenizing tendency; the percentage of the low frequency energy will be decreased relatively.
Simulation and Experimental Study on the Impact of Breadth of Back Blade on Axial Force Balance
Authors: Wang Hui , Mu Jie Gang , Su Miao Yin , Zheng Shui Hua , Zhao Jin Jing , Lu He Quan
Published: October 2011

The paper studies the relationship between axial force and breadth of back blade by numerical simulation and experiment. On the basis of the RNG k-ε turbulence model and technology of compact local grids and regional computing, three dimensional numerical simulations to 100HZ165-250 centrifugal pump with various breadths were carried out. Through comparing and analyzing of the flow field, it can be seen that the axial force reduces with the increase of the back blade breadth. After that, the simulation results were verified by the experimental data got from different test devices, and it shows that the conclusions are reliable.
Discussion of Energy Consumption Analysis Method on Energy System
Authors: Zhang Cai Juan , Wang Li Gang , Wu Ling Nan , Liu Tong , Lu Qiang , Dong Chang Qing
Published: October 2011

With the social rapid development, the earth's limited primary energy such as coal, oil, natural gas etc will be exhausted; energy problem has caused worldwide widespread attention. Therefore, under the development of renewable energy, without exception, each country is actively trying to explore the new theory and using energy-saving and technology to improve energy utilization ratio and reduce the energy consumption and the harm on environment. Scientific analysis of energy saving is an important link of digging energy saving potential, effective energy analysis method plays a pivotal role in implementing saving energy. This paper summarized several energy analysis methods on the basis of the first and second law of thermodynamics, introduced the most widely used enthalpy analysis method, entropy analysis, exergy analysis and exergy economic analysis which are based on the second law of thermodynamics, introduced emphatically the specific consumption analysis theory development with exergy analysis and exergy economic analysis.
Automatic Monitoring System for Coal Mine Safety Based on nRF24E1
Authors: Zhu Ying Li , Zeng Wang Hui , Xie Ling Qing
Published: October 2011

This paper describes the design of monitoring system for coal mine safety constructed by MSP430 and nRF24E1, which has described the structure of the system, working principle, and gives the hardware design of sensor nodes and the software design. This system is used for on-line monitoring of coal mine safety with the character of simple structure, low cost, low power consumption and so on, which will improve the level of monitoring production safety and reduce accident in the coal mine.