bluuebunny/crossref_metadata_2025 huggingface dataset:
Research on a New Type of Electric Energy Meter Charged Detection Terminal Box
Authors: Cheng Ying Ying , Yang Hua Xiao , Xiao Ji
Published: March 2013

Aiming at the field live detection of the electric energy meter, the research on the new structure and the charged detection method of the terminal boxes were carried out. The results can be directly applied to the charged detection of the electric energy metering device, which can improve work efficiency and security. It has great significance to ensure that the electric energy metering device of the power system can operate safely, stably and economically.
Application of Multi-Agent Simulation for Decision Support in a Construction Corporation and its Comparison with Critical Path Method
Authors: Aksyonov Konstantin , Bykov Eugene , Aksyonova Olga
Published: March 2013

The paper focuses on application of a decision support system BPsim.DSS and the multi-agent approach to processes at a construction corporation, explains key benefits and compares results of proposed method with another popular one – the critical path method. Paper gives an example of the system deployment in production environment and presents achieved results.
Plastic Mould Design Optimization Method Research Based on the Reverse Engineering Technology
Authors: Guo Heng Ya
Published: March 2013

Reverse engineering technology has been rapid development in complex product manufacturing sector because of its high efficiency and precision,etc. Compared with the traditional plastic mould CAD technology, using reverse engineering technology can further shorten product design cycle, improve the design efficiency of development, and it is the technical inheritance, application, reference and innovation product design to the existing product . This article integrated applies the reverse engineering technology to achieve product optimization design and corresponding plastic mold development based on the actual example.This technique can reduce the product design time, avoid repetition design, reduce the number of design and processing time, reduce the cost of each link, and can significantly improve the economic benefit of products.
Product Design Thinking Mode Based on Analogical Reasoning
Authors: Yin Bi Ju , Xiong Yan , Li Yan , Li Xiang Long
Published: March 2013

Analogical reasoning is a common way to produce design concept, but there are less researches of design thinking based on the analogical reasoning. This paper constructesd a kind of design thinking schema based on the analogical reasoning (DTSBAR), pointing out the general flow of the thinking mode, with discussing the general characteristics of analogy mapping and analogy inference reasoning process. The design process of portable pencil sharpener proved effectiveness of this design thinking patterns. The research would be helpful to understand the designer's design thinking rules, and to promote the production of design innovation.
Product Opportunity Classification and Restructuring Method Based on AHP and Kano Model
Authors: Jiang Li Li , Li Wen Qiang , Li Yan , Yang Kun
Published: March 2013

Product conceptual design is the most significant process during product design and manufacture. As the headstream of conceptual design, the recognition, classification and restructuring of product innovation opportunity play a decisive role in the subsequent design and manufacture. Based on AHP method and kano model, this paper made an organization, classification and restructuring of product innovation opportunity to realize the multi-opportunity conceptual design. The electric water heater was taken as an example to testify the feasibility of the method.
Improved Heuristic Search Algorithm for Multi-Vehicle and Multi-Cargo Loading Problem
Authors: Ren Chun Yu
Published: March 2013

This paper studies multi-vehicle and multi-cargo loading problem under the limited loading capacity. According to the characteristics of model, improved Heuristic Search Algorithm is used to get the optimization solution. Firstly, on the basis of cubage-weight balance algorithm, construct initial solution to improve the feasibility. Secondly, adopt the operations of 1-exchange and 2-opt* to fasten the speed of convergence and boost the search efficiency. Finally, the good performance of this algorithm can be proved by experiment calculation and concrete examples.
The Character of Cretaceous Period's Intrusion in Xinjiang Uygur Autonomous Region
Authors: Wang Yan Hong , Zhang Zheng Ping
Published: March 2013

It is regarded that the magmatic activity is over in Upper Hercynides and become stable platform in Mesozoic era in the Shanshan county, Xinjiang province, China. According to the regional geology investigation , rhyolitic porphyry and porphyry granite are broken out. Based on the analysis of rock petrology features, petrochemistry, geochemistry, the latest researches of formation and isotope dating results, it is believed that intrusion is formed in cretaceous period and is the result of Yanshan movement.
The Potential of Renewable Energy for the Alleviation of Climate Change in China
Authors: Li Lu , Tan Zhong Fu
Published: March 2013

With the introduction of clean development mechanism (CDM), people focus on finding the possibility of using CDM in many sectors recently. This paper presents a brief potential capacity of renewable energy for CDM in China. It analyses the current situation in renewable energy and concludes that there are a variety of possible potential, mainly in the areas of wind power, small hydropower, solar photovoltaic, biomass energy and coal-bed methane. From these different aspects, this paper discusses the potential for alleviation of climate change in corresponding areas separately. It also underlines the role of the CDM in reducing CO2 emission, which is good for the environment in global climate change.
Design of Machining Fixture for Thin-Walled and Eccentric Parts
Authors: Liang Rong Qing , Cong Jin Ling , Sun Jin Dong , Kan Za , Li Cheng Song , Sun Feng Jin
Published: March 2013

The paper was conducted to solve the low machining accuracy of eccentric parts and thin-walled parts on tomato harvester, reduce the machining steps of thin-walled parts and eccentric parts, and promote the machining accuracy and labor productivity, a special fixture was designed. High concentricity machining was applied based on adjusting the fixture, and manufacturing workpiece didn’t need to dismount, thus the concentricity and machining accuracy of manufacturing workpiece can be achieved. It’s beneficial to improve productivity and production quality.
Parametric Study of Combustor Machined Ring Film-Cooling with TBC
Authors: Xu Yong Gang , Wang Qiang
Published: March 2013

Through the set up of a calculation model on film cooling in the primary zone of an annular combustor, a parametrical study was made on the relationship of film cooling effectiveness and wall temperature with configuration parameters such as cooling slot height and TBC thickness. Through parametrical study, it can be seen that with all the parameters kept the same and even the resulting effectiveness of the outer liner slightly greater due to a slightly higher blow ratio, the outer liner temperatures are considerably higher than the inner liner temperatures. The calculation shows, with cooling effectiveness, there are optimum values of coolant injection angle and film cooling slot height, while there is a monotonous tendency for the relationship of cooling effectiveness with other parameters such as tapered angle on nugget lip, starting edge angle at nugget-slot exit and lip thickness .The study demonstrates that the higher the TBC thickness, the lower the highest value of base metal temperatures, but when the TBC thickens, it becomes heavier, and the possibility of TBC spallation gets greater.
Design and Finite Element Analysis of Liquid Sliding Bearing and the Matching Spindle of High-Speed Roller Grinding Head
Authors: Wu Huai Chao , Chen Shi Tao , He Yong Yong , Zhang Hui Juan
Published: March 2013

Through analyzing the design methods of liquid sliding bearing and the matching spindle of common roller grinding head, the design methods and ideas of liquid sliding bearing and the matching spindle of high-speed roller grinding head are put forward, and on these bases, a kind of liquid sliding bearing and the matching spindle of high-speed roller grinding head are designed. By means of finite element analysis of the bearing and the matching spindle respectively, it can be known that thermal property of the designed liquid sliding bearing can meet the working demands of high-speed roller grinding, and the designed spindle can meet the demands of strength and stiffness under the condition of high-speed grinding, thus, important reference materials for forming core technologies of high-speed roller grinding head are provided.
Experimental Modal Research on the Cutting System of EBZ-75 Type Boom-Roadheader
Authors: Liu Song Yong , Luo Chen Xu
Published: March 2013

Based on the virtual prototype technology, using the ADAMS vibration analysis module, the displacement response rule of the main mechanism of the cutting system excited by sinusoidal harmonic excitation is obtained. And through the analysis of the results, the fact that 20HZ, 29HZ, 120HZ and 134 HZ are the sensitive frequency of the main mechanism is found out. Using the hammer test modal analysis methods to analysis cutting system of EBZ-75 type boom-roadheader, and compared with simulation results, the sensitive vibration frequency in vertical direction of the cutting system is achieved, which provides a test reference data for the optimize design of the cutting system.
Comparison between Vessel’s Displacements Calculated by Bonjean Curves and Hydrostatic Curves
Authors: Rong Lei , Cui Jian Hui
Published: March 2013

Hydrostatic Curves is widely used to calculate vessel’s displacement by ship’s officers and surveyors. However, under some specific circumstances such as light ballast arrival condition, it is difficult to obtain an accurate figure of displacement by using Hydrostatic curves. At this time, Bonjean curves as an alternative can be employed in calculating vessel’s displacement. The procedures are introduced step by step to calculate the vessel’s displacement by Bonjean’s curves. The differences of calculation by two means are demonstrated on a specific bulk carrier and therewith the reasons are analyzed. Finally, the article appeals the detailed Bonjean curves shall be provided on board by shipyard for improving the accuracy of calculation.
Hydraulic Model and Simulation Analysis for Monorail Brake System
Authors: Gao Feng , Xiao Lin Jing , Guo Shuai , Ma Hong Gang
Published: March 2013

This paper mainly analyzes the hydraulic system principle during the monorail braking, and come to a conclusion that the spring stiffness and the throttle valve flow area are main factors affect the brake system. Then we use the MSC.EASY5 to modeling the hydraulic system, and simulate the unloading time of hydraulic cylinder under the spring force, the result shows that, the response time of a braking system can meet the requirement of the coal mine safety regulation, and change the flow area of throttle valve will affect the brake system.
Sine Simulation of Energy Regulation Based Electrohydraulic Variable-Speed Drive
Authors: Xu Ming , Jin Bo
Published: March 2013

The variable-speed electrohydraulic drive, which can achieve similar energy efficiency as volume drive system, has some good features. But the slow response and poor low-speed performance limit the development of the variable-speed electrohydraulic drive. The energy regulation based variable-speed electrohydraulic drive is a good solution to solve these problems by adding an energy regulation device and a throttling valve into the system. The sine simulations of energy regulation based electrohydraulic variable-speed drive are carried out. The simulation results have showed that the energy regulation system can not only achieve the goal of a good response, but also keep a good energy-saving performance.
Prediction of Emission Performance in a Diesel Engine Fuelled with Bio-Diesel Based on Double-Hidden Layer BP Neural Network
Authors: Tang Dong , Xu Ya Chao , Yao Shu De , Li Chang Yuan , Li Nan
Published: March 2013

Based on BP neural network relevant theories, using the fuel consumption, the load and the diesel blended rate as input parameters and measured CO, HC, NOx and soot emission data from bench tests of 180FA diesel engine under various operating conditions as training samples, a double-hidden layer BP neural network model for emission performance in a diesel engine fuelled with bio-diesel was established. The results show that the prediction results of CO, HC, NOx and soot emissions have a good agreement with their experimental ones, and correlation coefficients (R) are very high. It is further shown that the predicted values of HC and CO emissions increase as fuel consumption rate increase, and the predicted values of NOx and soot emissions decrease with the increase of fuel consumption rate.
Effect of Pressure Conditions on Characteristics of (Ca0.2Sr0.8)3Ti2O7 Dielectric Ceramics
Authors: Tung Hsin Han , Chen Yu Chuan , Chen Wen Shiush , Hsu Cheng Hsing , Lin Jenn Sen
Published: March 2013

The microwave dielectric properties of (Ca0.2Sr0.8)3Ti2O7 ceramic system have been investigated with various pressure conditions. The compounds were prepared by the conventional solid-state route with various pressure conditions from 60 to 80 Kg/cm2 and sintered at 1450oC for 4 h. The structure and microstructure were analyzed using X-ray diffraction and scanning electron microscopy techniques. The (Ca0.2Sr0.8)3Ti2O7 had excellent dielectric properties: Q×f ~ 50,000 (GHz) and εr ~ 63.2 for the sample at 70 Kg/cm2.
Preparation and Characterization of Several Latent Curing Agents for Epoxy Acrylate Resins
Authors: Chen Jing Jing , Wang Hui , Zhu Chuan Fang
Published: March 2013

In this paper, novel latent curing agents for epoxy acrylic resin a~e were synthesized and characterized with 1H NMR and MS in this study. Pot life of epoxy acrylic resins containing 3wt.% a~e or γ-aminopropyltrithoxysilane was compared in this paper and experiment data indicated that a~e were inactive in epoxy acrylic resin at room temperature. Curing temperature for double compositions resin is about 120°C and pot life at room temperature is longer than 6 months. The optimal curing condition for these curing agents were selected through several experiments.
Research on the Optimization of the Bonnet Polishing Tool
Authors: Wang Chun Jin , Yang Wei , Wang Zhen Zhong , Pan Ri , Guo Yin Biao
Published: March 2013

Bonnet polishing is a practical and economical polishing technology for the fabrication of precision optical components. Its removal function is controlled by many parameters, and much research has been performed on them in the past few years. However, most of the previous research has been focused on the inner pressure of the bonnet, the rotation speed of the spindle, the precession angle, the bonnet decrement, etc. The deformation of the bonnet under the inner pressure has received relatively little attention. This paper demonstrates the deformation of the bonnet under the inner pressure and its effect to the contact area and the bonnet decrement. It also proposes two solutions, one is to add an enhancement layer on the bonnet; the other is to design a novel bonnet contour which is aspheric but turns to spherical under the effect of the inner pressure. The latter one is proved that it’s effective to reduce the deformation to the polishing process.
Evolution of Porosity in Lotus-Type Porous Copper Fabricated by Continuous Casting Technique
Authors: Li Wen Qiong , Li Xiang Ming , Jin Qing Lin , Zhou Rong
Published: March 2013

Lotus-type porous copper materials were fabricated by continuous casting technique. The relationship between porosity and external pressure were developed based on the solute mass conservation law. Theoretical values of porosity are in agreement with our experimental results. Results show that porosity decreases when the partial pressure of hydrogen increases for cases of no pressure of argon above melt, while porosity first increases and then decreases as the partial pressure of hydrogen increases for case of nonzero pressure of argon above melt.
Investigation on the Application of Hot Forming in the Automotive Component Design
Authors: Liu Ke Su , Ma Ning , Liu Quan Kun
Published: March 2013

Hot forming is the advanced technology that integrates traditional heat treatment and cold stamping. The ultra high strength component with the tensile strength 1600 MPa can be manufactured by hot forming. The tensile tests of the hot forming material and part are investigated. The yield limitation of the part by hot forming is more than 1000MPa, and the strength limitation is more than 16000MPa. Three-point bending experiments of the reinforced beam by cold stamping and hot forming are carried out. The experimental results show the parts by hot forming have excellent loading capability and impact resistance. The optimization design method for hot forming part is investigated and presented.
Luminescent PAN Fibers Doped with Tb3+ by Electrospinning
Authors: Zhao Dong Mei , Du Yu Hong , Jiang Tao , Bai Xu Duo , Zhao Hong
Published: March 2013

In this study, monodispersed Tb3+ ions were successfully dispersed in the polyacrylonitrile (PAN) solution. Tb3+/PAN composite fibers were fabricated by electrospinning the PAN solutions containing different amount of Tb3+ ions. Further investigation showed that Tb3+ ions were homogeneously dispersed in the fibers individually. The composite fibers showed a uniform and continuous morphology. The as-spun fibers were characterized by Field Emission Scanning Electron Microscope (FE-SEM) and X-ray diffraction (XRD)
Study of the Damping Properties of an CPE/ZKF/BPSR Organic Nanocomposites
Authors: Ding Xin Bo , Liu Tao , Fu Bao Cheng , Han Jian
Published: March 2013

A novel organic nanocomposite consisting of chlorinated polyethylene (CPE), 2, 2’-methylene-bis-(4-methyl-6-cyclohexylphenol) (ZKF) and 4, 4’-thio-bis-(3-methyl-6-6tert-butyl- phenol) (BPSR) was prepared in this article. It was found that the presence of three-dimensional supra-molecular intermolecular hydrogen-bonding interactions was useful to not only compress and aggregate the molecularly dispersed ZKF and BPSR into nano-scaled particles, but also partially block the generated nanoparticles and effectively prevent them from over aggregation into large particles. The DMA results showed that there was a critical concentration for BPSR. When BPSR content was beyond the critical value, a novel loss peak was observed because of the formation of ZKF-BPSR-rich phase. These may imply that CPE/ZKF/BPSR nanocomposites possessing both high loss peak and controllable loss peak position can be more efficient in damping performance.
The Basic Research on Numerical Simulation of Bimetal Composited T-Tube through Hydraulic Bulging
Authors: Wang Hui Feng , Han Jing Tao , Hui Zhang
Published: March 2013

Bimetal composited tube is constituted by two different metals. Comparing with single metal tube, composited tube can make the best of optimum performance of based tube and clad tube. In present research, straight bimetal tubes were taken as the objectives and have been studied deeply. A new hydroform process is introduced in this paper, which can be used to form bimetal composited special tubes. Loading path, loading method, deformation of material, influence of frictional force etc. are studied using numerical simulation fully and the key technique and specialty of this technology were gained. Through simple equipment bimetal composited T-tube has been prepared.
The Numerical Simulation of Multi-Directional Forging 6700 Steering Knuckle
Authors: Zhou Zhi Ming , Yang Hu , Tang Li Wen , Zhang Bao Liang , Luo Jing , Song Xiao Fang , Wang Xiang , Cao Min Min
Published: March 2013

The numerical simulation of multi-directional precise contour forging of 6700 steering knuckle was studied in this paper. A 3D thermodynamic coupling finite element method (FEM) was established for each process of the deformation, based on the rigid-viscoplastic finite element method FEM. The results showed that the shape and size of the blanking billet can be optimized and the materials utilization ratio and the dimensional accuracy can be increased dramatically by using multi-directional precise contour forging
Applied Expert System Design for Energy-Efficient Distillation
Authors: Li Rui Duan , Gao Wei Ping
Published: March 2013

There are so many energy-efficient distillation processes that it is difficult to select the best distillation process and achieve optimal design for a mixture of separation. Studying on different energy-efficient distillation processes, and we finally extracted 30 typical energy-efficient distillation processes, and established mathematical models of these processes to optimize and design. The characters and applicable conditions of every flow were obtained. According to the summary, we build a knowledge base for the expert systems. This was main content of the knowledge base of the system software. This expert system software ，based on windows XP system, was installed with Prolog and. Net.
A New Chaotic Attractor and its Digital Implementation Based on LabVIEW
Authors: Yang Hong
Published: March 2013

In this paper, a novel three-dimensional autonomous chaotic system with six terms and two quadratic nonlinearities is presented. Some basic dynamical properties of the new chaotic system are analyzed by means of equilibrium points, eigenvalue structures, Lyapunov exponent and Lyapunov dimension. In order to overcome the external conditions affected by the analog circuit’s chaotic system, digital implementation of the new chaotic system based on LabVIEW is also proposed. The results show that the experimental results by LabVIEW are consistent with the theoretical simulation results by Matlab, and the method is an effective digital implementation method.
A Wire Angle Detection System of 2-DOF Gantry Crane Robot
Authors: Wang Hui , Li Hui , Gao Li Hua
Published: March 2013

Generally a crane robot and a load are connected by a flexible wire. The load swings simultaneously when the crane robot runs because of its inertia. So it is difficult for us to realize high accurate trajectory tracking of a crane robot. In order to achieve automation and high security of crane robot operation, we should get the accurate data for lifting wire. Thus it is necessary to design a wire angle detection system of 2-DOF gantry crane robot which is simple, low cost, good for real-time processing, suitable for both indoor and outdoor uses and feasible for the accurate data for lifting wire simultaneously.
An ER Haptic Master-Slave Robot System for the Minimally Invasive Surgery
Authors: Shin Won Ki , Choi Seung Bok
Published: March 2013

In this research, a slave robot is proposed and integrated with an electrorheological (ER) haptic master for minimally invasive surgery (MIS). A novel mechanism of the slave robot with a gimbal joint is developed to realize 4-DOF motions. The proposed slave robot consists of two arms, gimbal joint and fixed bar. The haptic master can generate a repulsive force as well as position motion for the slave robot. The manufactured slave robot and haptic master are remotely connected with each other via TCP/IP communications. Both repulsive force and position tracking control are evaluated in experiment.
Mobile Robot Hydraulic Drive Energy-Saving Circuit Simulation Based on the High-Frequency Switching Valve
Authors: Zhang Jun , Xue Yong , Yang Jun Hong , Wang Zhuo , Shang Jian Zhong
Published: March 2013

Due to the constraints from weight, volume and other various factors, mobile robot hydraulic drive system uses single pump and multi-actuator hydraulic drive structure. The high efficiency of the structure is the key to the successful application in hydraulic robot. The traditional servo valve control system possesses good position control ability, but it has the problem of bilateral throttling loss and great valve port pressure decrease. This paper proposes a hydraulic position control system based on high-frequency switching valve, which controls valve port opening and closing, through the PWM signals, so as to control flows, guarantee the position control precision as well as reduce the required system pressure, thereby achieving the effect of energy conservation. By using AMESim and Adams co-simulation and simulating the real stress environment, the feasibility of energy-saving in high frequency switching valve circuit has been verified.
Design Bionic Structure and Analysis of Kinematics for Aircraft Fuel Tank Inspection Robot
Authors: Gao Qing Ji , Wang Wei Juan , Niu Guo Chen
Published: March 2013

Aircraft fuel tank leakage is a very common maintenance problem. A snake-like robotic detector was designed for troubleshooting leaks of fuel tank which has strong constraint and is also explosive. The robot has several flexible sections based on bionics, and it can achieve actuation redundancy by independently pulling its four driven cables to carry out a bending motion of two-degrees of freedom. A solution framework was established among the cables length, angle and tip coordinate of single section by projection curvature and coordinates transformation. The decoupled kinematics equation between the multi-sections was deduced based on the analysis of single-section kinematics. Finally the correctness of the kinematics method was demonstrated by prototype testing.
A Research into the Use of Temperature Nephogram in Measuring Substation Temperatures
Authors: Liu Zhi Wei
Published: March 2013

This paper builds two temperature field models by using Inverse Distance Weighting and Kriging algorithms respectively and compares the accuracy of these two models. Then it analyzes the factors that influence the accuracy of temperature fields, which include the interpolating methods that are used, the accuracy of the plane coordinates and the number of measured points.
An Innovative Accurate Experimental Methodology for Measuring Electronic Charges Based on Optical Principles
Authors: Tan Zu Yan , Zhang Cheng Duo , Wen Zhi Hao , Wang Jie Lin
Published: March 2013

A simple device for precise measurement of electronic charges is designed in this paper. The electriferous ball deflect at an angle when placed in a strong electric field and kept balanced. The optical maser then deflect at the same angle through the sensor. The laser light reflect between the two mirrors up and down for many times, enlarging the displacement of the ball. Then the electronic charges of the ball will be precisely attained through geometric and mechanical relationships.
FEM Design and Experiment of XY Motion Platform in Flip Chip Machine
Authors: Zhang Lu Fan , Long Zhi Li , Fang Ji Wen , Cai Jian Dong , Nian Long Sheng
Published: March 2013

XY motion platform in flip chip machine plays a key module to achieve precise positioning in the process of flip chip packaging. The paper presents an XY motion platform structure. The static and modal characteristics of the XY motion platform were calculated by finite element method, and then some important conclusions were obtained. The displacement and stress distribution of XY motion platform were disclosed. The relevant change trends of displacement and stress under the different load were investigated and the first four natural vibration modes of the XY motion platform were obtained. In the experiment, the vibration behavior was measured by a non-contact laser measuring device. The experiments verify the correctness of the simulation of the XY motion platform. These results can help improve the reliability of the XY motion platform.
Applications of Doppler Radar Sensors on Railroad Crossing Safety Alerting System
Authors: Wang Sheng Hang , Chang Kuang I , Chen Jyun Long , Tsai Mu Yu , Chuang Bor Nian
Published: March 2013

Radar sensors like ultra-wideband Doppler radar sensors may be utilized as a vibration sensing device in a restricted area for railroad monitoring. As long as something or someone enters the restricted area, the alert signals will be sent to the control center or train driver to stop the moving train and prevent accidents. Combining with visual monitor system, the radar sensors may compensate for the insufficient information under poor lighting, fogging, or raining environment. The simulations and experimental results supported its feasibility in a railroad system. The feasibility of further radar application is also discussed.
Dye Concentration Calculations Using Derivative Ratio Method in an Online and In Situ Optical Fibre Dyeing Sensing System
Authors: Tian Jun Ying , Zhao Xiao Ming , Zhang Jian Fei
Published: March 2013

The objective of this work was to discuss a calculation method of dye concentration in mixed dye bath, to develop an optical fibre sensing system for in-situ monitoring of dye concentrations in a dye bath and control the rate of exhaustion to ensure that the dyeing process yields the desired product. A designed optical fibre sensing system was proved to be practicable to measure the single dye concentration accurately, it is important to chance right calculation method in measuring mixed dye bath concentration. The experiment prepared known concentration mixture with reactive red 2G and yellow 4G. Based on measured absorption spectra, dyes concentrations were calculated by derivative ratio method. The calculated results were compared with the prepared concentrations. The accuracy was discussed. The results show that calculated dyes concentration by derivative ratio method well matched the prepared value at the certain concentration range.
Information Extension of Three-Dimensional Model for Coordinate Measurement
Authors: Yang Jing Zhao , Wu Bao Zhong , Li Guo Xi , Wang Jie
Published: March 2013

The process of coordinate measurement involves a large amount of data. This paper uses the IDEF0 and DFD model to analyze the measuring function requirements for solving the problem of ambiguous internal information flow and material flow during the measuring process and uses IDEF1X method to constitute information model of coordinate measurement. The information is extended on the three-dimensional model generated by using the MBD (model based definition) technology. It enables us to specify the measurement process and reduce the specification uncertainty of the digital measuring system. In addition, the extended information could have been inputted for the subsequent process such as process planning, data analysis and evaluation of measurement results.
Model-Data Comparison of High Frequency Absorption and Velocity for the Water-Saturated Granular Medium
Authors: Seong Woo Jae , Yang Hae Sang
Published: March 2013

Dispersion relation for the p-wave sound speed and attenuation has been described by several models based on continuum or scattering theory. As an alternative approach, this study proposes a model describing relation for the p-wave in case of elastic grain scatterers existing in background fluid medium. Dispersion relations are shown as a function of different grain size distribution and Rayleigh parameter . For quantitative analysis of the proposed model, experiments are performed using water-saturated glass beads. Two sets of experiments employing unimodal and bimodal grain size distributions are performed and used for comparison with the current proposed model.
An Optimized Strategy Based on Hysteresis Space Vector Control of Three-Phase VSR
Authors: Chen Xiao Ju , Zhang Ai Min , Huang Jing Jing , Wang Jian Hua
Published: March 2013

In order to reduce the vast total harmonic distortion (THD) caused by hysteresis loop space vector control strategy in three-phase Voltage Source Rectifier (VSR), an optimized strategy based on fuzzy rules is proposed in the paper. In the new strategy, a current error vector threshold value was pre-set. When the actual current error value is less than the threshold, the hysteresis loop space vector control strategy will be adopted to reduce the switching frequency and loss. However, when the current error value is larger than the threshold, the optimized hysteresis loop control strategy based on fuzzy rules will be adopted to achieve the fast current tracking. Based on the new strategy, the simulation model has been established and simulated by matlab/simulink. And the results show that the optimized control strategy not only ensures the fast dynamic response with low switching frequency, but also reduces the current THD significantly. Finally, the feasibility and the superiority of the optimized strategy based on fuzzy rules have been further verified under a 1kW experiment system.
Study of Mine Environment Monitoring System Based on Wireless Sensor Network
Authors: Wang Jun , Wang Feng , Han Shu Ren
Published: March 2013

There are a large number of sensors to detect information in mine environment system, which provides the original data for the prevention and treatment of mine accidents. According to data flow of data acquisition, data transmission, data storage and data processing, this paper used CC2530 to design the wireless sensor nodes, analyzed the Zigbee network topology underground and designed an optimized PEGASIS protocol. The multi-sensor data fusion method was applied to the multi-parameter and large-scale mine data, solved the nonlinear problems in the multi-feature selection and extraction and also improved the performance of mine monitoring system.
Study on a New Elastic Element of Fiber Bragg Grating Accelerometer
Authors: Shao Jun , Jia Zhen An , Liu Jun Hua
Published: March 2013

A new elastic element of fiber Bragg grating accelerometer which is four peripheral clamped trapezoidal beams is developed. On the basis of analyzing the mechanical condition of this elastic element, the theoretical model is obtained. This kind of elastic element not only can be used with fiber Bragg grating accelerometer, but also other types of sensors.
Electric Vehicles Online Monitoring System Design Based on the Hybrid Reasoning
Authors: Zhang Wei Guo , Chu Yi , Zhao Ming Yu , Hong Fu Bin
Published: March 2013

This paper designs a set of electric vehicles online monitoring system with SOA framework, which includes acquisition layer, network layer, support platform, knowledge base layer and presentation layer, and knowledge layer includes a knowledge base management system, reasoning system and man-machine interface system. Also, this paper constructs a knowledge expert system with hybrid rule-based reasoning method of CBR and RBR, finally, electric automobile remote intelligent fault diagnosis is illustrated with the expert systems.
The Design of SO2 Sensor Node for Monitoring Table Grape Logistics
Authors: Han Yu Bing , Hou Dong Dong , Liu Yuan Yang , Dong Jie , Hu Dai Rong
Published: March 2013

Because of the requirements of table grape logistics storage and transportation environment, a SO2 sensor node is designed based on the CC2530 chip to achieve the purpose of rapid and accurate transmission of the environmental concentration of SO2. And relevant tests were done to check the communication and monitoring performance of the node. The results can be good to meet the concentration of the environment SO2 and the design requirements.
Micro-Current Signal Acquisition of Formaldehyde Detection Based on the MSP430
Authors: Sun Chao , Ding Jian Jun
Published: March 2013

Excessive intake of formaldehyde gas is harmful to human health. Design of fast digital detection of formaldehyde gas is contained in this paper, which take use of sensor for rapid detection of formaldehyde in the air , a data conditioning and acquisition circuit of changing nano-amps current provided by the sensor into a suitable voltage after the MAX4072 and OP37 was designed and the voltage would be received by MSP430 at last. This formaldehyde digital detector can improve the detection accuracy; it also can determine whether the formaldehyde in the air exceed the body can bear in a short period of time.
Research on Multivariable Model Reference Variable Structure Control
Authors: Jiang Xu , Feng Zhi Tao
Published: March 2013

This paper studies the output-feedback variable structure control for MIMO (multi-input multi-output) linear systems with generalized relative degree one. A new variable structure control scheme is proposed within the framework of model reference control. Under the assumption that the high frequency gain matrix of the plant can be transformed to a main diagonal dominant matrix via full rank transformation, it is shown that all signals of the closed-loop system are globally uniformly bounded and meanwhile, the tracking error converges to zero exponentially. Simulation results are presented to illustrate the effectiveness of the proposed scheme.
A Method on Monocular Vision of Camera for Spatial Position
Authors: Yang Zhen , Wu Ming Jun , Wang Fang , Zhang Li , Gong Li Na
Published: March 2013

In this paper, a method on monocular vision for spatial position is presented. The geometric model of digital camera is built and decomposed to intrinsic and extrinsic parameter matrixes under a certain assumption. Firstly, the intrinsic parameter matrix of camera is determined. Then, the extrinsic parameter matrix is solved according to the information of image. The edge detection operators are worked and in order to detect the accuracy of this method, the point of some feature points are obtained by using the principle of least squares. Compared with the conventional calibration method, this method is simple, fast and robust.
A Specific Methodology of Creep Compensation for Piezoelectric Actuators by Open-Loop Control
Authors: Wang Xuan , Budinger Valérie , Gourinat Yves
Published: March 2013

Piezoelectric actuators exhibit creep behavior in open-loop operation, which may lead to unaffordable errors in high precision static positioning systems. An inversion-based compensation strategy by open-loop control is presented for reducing creep effect. The approach utilizes a nonlinear viscoelastic model to portray creep phenomenon, which consists of a linear spring, a nonlinear dashpot and a series of nonlinear Voigt elements. It is shown that for the presented creep model the step responses are very similar to the piezoelectric actuators. In order to compensate creep effect, a concept of voltage relaxation in piezoelectric actuators is proposed. And the voltage relaxation model tantamount to the inverse creep model is derived using a PID closed-loop control system. Experimental results prove that, by insertion of voltage relaxation model in open-loop operation, creep effect is attenuated markedly in piezoelectric actuators.
Vehicle Hydraulic Brake Energy Storage System Design
Authors: Zhang Yu Bao , Jin Meng
Published: March 2013

Simple description the background of hydraulic hybrid technology, scope of application. Put forward the idea of hybrid hydraulic system design based on the car's braking performance, the main elements parameter calculation. Simulation results show that the braking process is smooth, brake energy recovery, the system design and parameter calculation of reasonable.
Green Traffic Tool Innovation – Design and Implementation of a Solar Car Prototype
Authors: Wang Hui Min , Liu Xuan Zuo , Liu Qian Cheng
Published: March 2013

Abstract: Solar car, a combination of a great number of relevant techniques with new energy sources, materials and structure, is both eco-friendly and energy-saving. Our research, whose chief goal is to bring solar cars into our daily life by the device of a prototype, will be concentrated on body structure, steering system and energy flows. A conclusion has been made that the solar car is very potential to be used as the sightseeing car and some optimizations have also been achieved.
New Procedure for Constraint Determination in Mobility Analysis for Classical Coupled Linkages
Authors: Liu Jing Fang , Huang Xiao Ou , Yu Yue Qing , Huang Zhen
Published: March 2013

A coupled mechanism is different from common parallel mechanism with independent limbs, so it is impossible to analyze the constraint and mobility by the traditional method based on screw theory. To overcome this problem, this paper proposes a new procedure to determine the overconstraint for coupled mechanisms based on screw theory, where a coupled mechanism is decomposed into several basic elements. The validity of the new procedure is further proved from the constraint and mobility analysis for a classical mechanism.
Research and Application of Synchronous Generator Model Based on Simulink
Authors: Jiang Xu , Feng Zhi Tao , Guo Hong
Published: March 2013

There is no abc axis system model of synchronous generator in the SimPowerSystem (SPS) of Simulink but the model of dq axis system ，and the model of generator in SPS is lack of flexible tuning function of variable. In this paper a model of synchronous generator is established in abc axis system, which is based on the Simulink software. This model is consist of basic calculation module in the Simulink is created to solve the above problems. Using the model simulates a rotating-rectifier brushless synchronous generator system of planes and the simulation results indicate that the model is accurate enough.
Numerical Simulation of Fluid-Structure Interaction in SRM under Cold-Flow Impact
Authors: Zhang Huan , Chen Jun , Feng Feng
Published: March 2013

The process of impacting adherent casting solid rocket motor under cool-flow impact was simulated using two-way fluid-solid coupling method by ANSYS workbench14.0. In order to truly reflect the interaction between the establishment of the flow field in the cool air impact process and the SRM grain, the impact pressure to the SRM grain was provided with reference to the structure of the shock tube. The process of the establishment and spread of the flow field pressure was simulated, according to the grain deformation under the cool air impact, the maximum deformation position of the grain was determined. The relationship between the amount of grain deformation and flow field pressure gradient was summed up by observing the law of flow field pressure distribution along the axial coupling surface.
Localization of Lamb Wave Scattering Source Based on Time-Frequency Analysis
Authors: Ma Ding , Shi Li Hua , Fu Shang Chen , Cao Hong Fu
Published: March 2013

Considering the influence of Lamb wave dispersion on the precision of damage detection, a new detection method of scattering source based on time-frequency curves and ellipse localization method is proposed. Empirical mode decomposition(EMD) is used to decompose the scattering signal into finite narrowband signals, and a modified continuous wavelet transform(CWT) is further used to get the time-frequency distribution(TFD) of the detected signal, and the arriving time of different frequency component is estimated based on TFD. A series of location results can be obtained from different frequency components using ellipse localization method. The damage position can finally be estimated by synthesizing localization results at different frequencies. Experiments on aluminum plate are conducted to demonstrate the efficiency of the proposed method. EMD-CWT analysis can get precise time-frequency curves in highly dispersive low frequency band of A0 mode. The damage location results is more accurate and the influence from occasional factors can be suppressed by using the synthesized method.
Experiment Study on Novel Precision Cropping Machinery Using Rotary Striking Action
Authors: Zhao Ren Feng , Zhao Sheng Dun , Zhong Bin
Published: March 2013

This paper illuminates a new type of precision cropping process method with rotary striking action. The new process makes use of a controllable circumferential strike on a metal bar with a V-shaped notch. The working principle of the machine is described. Different types of metal bars have been tested, and both bad results and successful results were stated in the paper. The most ideal control mode has been obtained. The experimental results show that the new cropping process can crop bars with different materials and diameters. In some cases, it can be directly used in the subsequent industrial production.
Cooperative Search of Autonomous Vehicles for Unknown Targets
Authors: Yang Sheng Qing , Yu Jian Qiao , Zhang Si Yu
Published: March 2013

Motivated by recent research on cooperative search of autonomous vehicles, a new approach for searching unknown targets is introduced in this paper. The unknown targets are assumed to be static. ZAMBONI search in spiral curve form is considered to implement the cooperation of vehicles. Algorithms that based on geometry underlying search process are discussed to make vehicles act in the spiral curves form. The receding horizon control is introduced for obstacle avoidance which can result in a feasible trajectory during the search process. Simulations of the hybrid method based on ZAMBONI search and receding horizon control show promising results.
Non-Geodesic Trajectories for Filament Wound Composite Truncated Conical Domes
Authors: Zu Lei , He Qin Xiang , Shi Jun Ping , Li Hui
Published: March 2013

The goal of this paper is to present non-geodesic trajectories for filament wound truncated conical domes for pressure vessels. The fiber trajectories for non-geodesically overwound truncated conical shells are obtained based on differential geometry and the non-geodesic winding law. The influence of the slippage coefficient on non-geodesic trajectories is evaluated in terms of the winding angle distributions. The non-geodesic trajectories corresponding to various initial winding angles are also illustrated for the given slippage coefficient. The results show that the winding angle distribution of non-geodesics on a truncated conical dome has an overall increase with the increase of the slippage coefficient or the initial winding angle. The present method can provide a significant reference for developing non-geodesically overwound conical structures.
Existence of the Solutions for a Class of Nonlinear Difference Systems Boundary Value Problem
Authors: Su Fang , Qin Xue Wen
Published: March 2013

In this paper, by using critical point theory, we obtain a new result on the existence of the solutions for a class of difference systems boundary value problems. Results obtained extend or improve existing ones.
Design and Experiment of Fatigue Testing Apparatus Driven by Piezoelectric Bimorph
Authors: Jie Meng , Xie Hai Feng , Liu Yan , Yang Zhi Gang
Published: March 2013

To get fatigue property of the small and hard brittle components working under conditions of little amplitude and high frequency force, a novel kind of high frequency fatigue testing apparatus driven by the piezoelectric bimorph has been proposed. Firstly, the working principle of the high frequency fatigue testing apparatus driven by piezoelectric bimorph is analyzed, and the simulation is made by the Finite Element Method software. Then a prototype is designed and produced. Finally, the maximum load on the sample is measured by the test. The results indicate that the maximum load on the sample is 65.3 N-150.7 N when changing the AC voltage amplitude (80 V-240 V), thickness of the elastic loader (28 mm-42 mm) and the thickness of the plate spring (0.9 mm-1.5 mm). The prototype made in this paper is suitable for the tensile and fatigue testing with the load level mentioned above under the condition of little amplitude and high frequency force
Numerical Investigation of Ranque-Hilsch Energy Separation Effect
Authors: Noskov A.S. , Alekhin V.N. , Khait A.V.
Published: March 2013

Some results of investigation of energy separation mechanism included in numerical model equations of air spiral flow appearing in Ranque-Hilsch vortex tube are presented in the article. Standard k-ε turbulence model had been used in the simulations. It was found that k-ε turbulence model make possible to predict Ranque-Hilsch energy separation effect by using special semi empirical term in energy conservation equation which accounts for turbulence heat conductivity effects.