bluuebunny/crossref_metadata_2025 huggingface dataset:
Real-Time Multiple Points Tracking and Localization Using Wide Angle Cameras for Indoor Flying Robot
Authors: Yang Guo Tian , Wang Shuo , Liu Tao , Liu Changan , Wu Hua
Published: December 2012

Using other visual information of object to compute its location is attracting lots of researchers and engineers in recent years. In this pager, a new real-time multiple points tracking and localization system is introduced while keeping the robustness in a certain degree. The ma¬j¬or contributions of our paper are: several infrared LEDs are used to avoid the interference of visible light, some wide-angle lens of the cameras are incorp¬orated to expand th¬e v¬isual field of cameras, and a real-time multiple points t¬r¬acking method is used to accelerate the points association among several ima¬g¬es captured from different cameras. In experiments, we mounted the points o¬n the flying robot to demonstrate that the real-time tracking is robust and the localization accuracy meets the application requirements.
Pressure Information of Bridges Collection System Based on the IoT
Authors: Zhao Liang , Ma Ji Sheng , Liu Fang Yi , Chen Zhi Kui
Published: December 2012

The pressure information collection of bridge buildings is important to monitor the healthy status of the bridge buildings. For the defects of traditional pressure information collection system, the paper designs a system for collecting the pressure information of bridges based on the IoT. To meet the demand of real time, the system sends the pressure information collected by pressure sensors to the data processing center through the CAN bus. Before storing the pressure information into the database, the system will fill the incomplete pressure information to provide the bridge experts with useful information. Simulation experiments show the system can collect the pressure information of bridges in real time and meet the demand of bridge experts.
The Performance of Steel Beams in the High Temperature
Authors: Yang Xiu Ying , Qin Qiang , Cui Yang Yang
Published: December 2012

To study the performance of steel at elevated temperatures, the stress and deformation of steel beam were analyzed under high temperature in this paper. During the analysis, the properties of steel material must be defined firstly, which are the decisive factor affecting the carrying capacity of steel beam. The mechanical and physical properties of steel at high temperatures were accessed accordance to the provisions of the European specification in analysis. The finite element program ANSYS was used to analyze the constraints steel beam, which subjected to the uniformly line loads, then the steel beam was heated up continuously, and the mechanical properties and deformation of the steel beam was analyzed at different temperatures. The regularity of mid-span deflection changing with temperature was concluded, so as the variation of axial stress at both ends of the steel beam.
The Study on Automobile Engine Visual Simulation Based on Vega Prime
Authors: Liu Kan , Ren Wei Wu , Dong Yang , Han Xue Tao , Lin Yuan
Published: December 2012

The key technology of visual simulation, of automobile engine is introduced in this paper. The mathematical model of crank connecting rod, and then-the mathematical model of the valve train get the results data Adams in dynamics simulation. The scene is driving. And the user interactions between the virtual environment is based on the prime minister and only once. Realization and system connecting rod crank-also in connection of valve and train. It has well real-time and soaked, and will bring reference value to the research of visual simulation system several similar mechanical transmission.
Development of New Enerfy-Saving Apparatus on Domestic Gas-Cooker
Authors: Liu Li , Zhao Li Yuan , Tian Ze Xin
Published: December 2012

To improve the efficiency of heat utilization on domestic gas-cooker, the reasons of low-heat efficiency and the factors which influence the measurement of heat efficiency were analyzed in this paper. A new energy-saving apparatus of domestic gas-cooker is developed by the preparation of special heat-insulating material, heat reflecting paint and the use of multilayer, scraggly and crossed abdominal fire rings. Meanwhile, the special designs with resort chambers of flame and the micropores can contribute to the circulation of combustion-supporting hot air. It has also demonstrated that the design increased evidently the detention and reflection of heat. Test results show that the efficiency of gas combustion and the heat utilization were effectively improved.
Robust Process Design for Continuous Casting Based on Numerical Simulation and Experimental Study
Authors: Zuo Shi Lun
Published: December 2012

In order to improve design efficiency and reduce design cost, a new method combining numerical simulation with experimental verification was proposed in this study. Firstly, controllable process parameters such as continuous casting speed and cooling water flow rate, are robustly designed according to the numerical simulation results of flow field, process experiments were subsequently done on a newly developed continuous casting machine of lead slice, then the robust optimal design for the continuous casting process were gained. The results show that the cooling water flow significantly affects axial thickness of the lead slice, while the casting speed determines mainly its circumferential thickness. When the casting speed is between 280L/min and 320L/min, and the cooling water flow rate is between 950r/min and 1100r/min at the same time, the axial thickness and circumferential thickness can been kept respectively in1.0±0.03mm and 1.0±0.1mm, which meet the robust design requirements.
Channel Modelling for WBANs
Authors: Yang Yi Huai
Published: December 2012

Development of an appropriate propagation channel model is an important step to design wireless body area network (WBAN). Because the human body has different body shapes (male, female and child), different tissues with different permittivity and conductivity (even the same person at the different age), and limbs positions and postures are changing all the time, this made the in-body channel modelling extremely difficult, if not impossible. There are few publications on implant communication channel models compared to wearable WBAN. In this paper, we present a literature survey on radio channel modelling for WBAN, especially the IEEE 802.15.6 models. The performance of the model is studied by simulating probability density functions (PDF) and cumulative distribution functions (CDF). Finally, we briefly outline some aspects of our future research works.
Effect of Building Materials on Numerical Simulation of the District Heating within the Typical Building in Beijing
Authors: Feng Fao , Li Xun , Ding De Ping , Xie Zhuang
Published: December 2012

In order to reduce energy consumption and analyze energy-saving potential of building materials, the principle of the energy equilibrium is applied to establish the relationship between outdoor temperature, supply and return water temperature of heating system. A numerical simulation model of supply and return water temperature is deduced. Based on the predicted air temperatures and observed indoor temperature from Haiyuan community,a simulation experiment is executed. The experiments show that the root mean square error between simulated indoor temperature and required temperature (20°C) is 0.26°C, root mean square error between predicted and observed supply water temperature is 3.76°C. When the heat transfer coefficient is decreased by 10%, the predicted supply water temperature and return water temperature is decreased 3.8% and 3.2%, respectively. This means the prediction model has a good quality.
Resolution of DWG Files Based on Dwgdirect and 3D Modeling
Authors: Zhao Di , Pan Cheng Wei , Li Hong Yi
Published: December 2012

This paper introduces data formats of DWG files, and offers simple description of each separate part of the file. People always use Autodesk AutoCAD to view and get information of DWG files. This paper tries to get the information without relevant platform of AutoCAD, and make use of the information to do some work about three-dimensional modeling of DWG files.
Study of Three-Phase Full Bridge Spwm VSI
Authors: Gai Zhi Wu , Yan Shi Sheng , Wei Ai Qi
Published: December 2012

In order to reveals the dynamic, nonlinear work process of three-phase SPWM inverter, simulation model of three-phase full bridge voltage source SPWM inverter was built. Typical figure of voltage, current and spectrum was given and analyzed. Figures include line voltage of load, phase voltage of load, neutral point voltage of load, source current wave, Fourier analysis, Total Harmonic Distortion of voltage and current, inverter input impedance, line to line impedance. This Simulation model and results can be used as auxiliary in teaching, scientific research and product development. This simulation model was intuitive, commutative, being able to display graphs dynamically. Using this simulation model in class, the difficult in teaching three-phase full bridge SPWM inverter will be solved, it can also advance students’ studying interests and strengthen their understanding and save class hours. This simulation model has important value.
Combining a Radial Basis Function Neural Network with Improved Genetical Gorithm for Vulcanizing Process Parameter Optimization
Authors: Zuo Shi Lun
Published: December 2012

Vulcanization is one of the important processes to manufacture water-lubricated metal rubber bearing. Since the vulcanizing quality of the bearing is mostly influenced by process prameters, how to determine the optimal process prameters becomes the key to improving the part quality. In this paper, a combining RBF artificial neural network with improved genetic algorithm method is developed to optimize the vulcanizing process. The result shows that the combining ANN/GA method is an effective tool for the process optimization, comparing with the Taguchi DOE technique, overall performance of the bearing has significantly improved under the optimal process parameters.
Discrete Interval-Valued Stress-Strength Interference Model Based on the Extended Universal Generating Function
Authors: Guo Hui Xin , Pang Xiao Bin , Yang Xin Fa , Cheng Li Zhi
Published: December 2012

A new approach was proposed to estimate the reliability of a machine component when the probability density functions of stress and strength can not be exactly determined or only finite experiment data of stress and strength are available. The conventional universal generating function was introduced and then it was extended to represent the discrete interval-valued random variable. The experimental data of stress and strength were formulated as two discrete interval-valued random variables. Based on the extended universal generating function, a discrete interval-valued stress-strength interference model was proposed. An approach was proposed to solve the proposed stress-strength interference model and it can be used to calculate the upper and lower bounds of the component reliability. An example was given to demonstrate the proposed approach. It is showed that the proposed approach is suitable to the reliability estimation of a machine component when only finite experimental data of stress and strength can be obtained.
Prediction of Braking Force under Ship-Tugboat Interaction
Authors: Yang Lin Jia , Rong Lei , Hong Bi Guang , Wang Xin Hui
Published: December 2012

It is inevitable that the wake affects on the braking force of tugboat towing in the stern of a ship. In order to understand the effect of ship-tugboat interaction on the braking force of tugboat, we have to consider two interference components, namely on the tugboat’s braking force in ships wake and on ship’s hull resistance. First, the interference component on the tugboat’s braking force is predicted considering the scale effect of ship’s wake velocity distribution, and using the braking force coefficient of tugboat-self in the uniform flow[1]. Then the interference component on ship’s hull resistance is also estimated under an assumption, which this component in full scale ship is in proportion to Schlichting’s frictional resistance as the component obtained in scale model experiments being a constant. Finally, the effective braking force for full scale tugboats was predicted by using the experiment data and the assumptions mentioned above.
Fatigue Analysis of Band Sintering Machine Trolley Grate Bars
Authors: Wei Yun Ping , Hu Chang Lan , Liu Xue Jiang
Published: December 2012

The band sintering machine consists of many trolleys,those make a closing sintering band.In the process of sintering,the trolley go forward luggage,light fire and sinter at on the top track,and eject the sintering mineral in the end.The trolley.In the whole work process,the trolley take the load of itself,the weight of bars,the weight of sinter mineral and take out breeze negative press of function,and then suffer the affect of hot again and again,therefore making very big of hot fatigue.The bars is the easierest damage part.Therefore make use of the finite element method to analys the fatige is very impotant.
Exergy Analysis of 330MW Thermal Power Unit
Authors: Yang Jian Meng , Wei Wang , Qi Nian Zhe
Published: December 2012

This paper took one 330MW unit boiler in one power plant as an example, then doing some research about the boiler system energy change through doing exergy analysis. After this, the exergy flow equation was established, the energy transfer, utilize and loss of the thermal power plant production was revealed, the exergy efficiency of the boiler was defined. So the paper can provide a basis for energy utilization of power plant.
Primary Study on the Model of Dispersal of the Thermobaric Explosive
Authors: Zheng Bo , Wang Zhi Fang
Published: December 2012

The experimental and theoretical study on the rapid explosive dispersal process model of a thermobaric explosive has been carried out. Detonation of a thermobaric explosive generates a blast wave followed by a complex supersonic gas-solid fluid, which the additive fuel, aluminum particles, in some cases, might catch up to and penetrate the leading shock front. The developing history of the explosive fireball is analyzed and the complex physical mechanisms are primarily determined, and the influence of the critical parameters such as the mass ratio of explosive and fuels and the fuel properties to dispersal radius and maximum dispersal velocity are estimated. The theoretical expression of maximum dispersal velocity of solid aluminum fuels was deduced and the mathematic expression of explosive dispersal radius with time was deduced. Overall, an excellent agreement is reached between the experimental and theoretical model results.
Vehicle Horizontal Hollow Stabilizer Bar’s Stiffness Calculation and Fatigue Life Prediction
Authors: Huang Kang , Cao Huo , Li Jia Wei , Zhang Zu Fang
Published: December 2012

Vehicle horizontal hollow stabilizer bar was born for car’s weight losing, but its stiffness and fatigue life has been being the focus of research. For the problem, this paper gives a new method to calculate hollow stabilizer bar’s stiffness and predict its fatigue life with finite element software and MSC, Fatigue, reliable and convenient, Innovation for this paper is giving a solution to the difficulties of the theoretical calculation of the hollow stabilizer bar stiffness, and a set of effective fatigue life prediction method of the hollow stabilizer bar. This method provides a technical basis for product design, shortens the design and production cycle, and greatly reduces the waste of destructive testing. Introduction
The Influence of Rotating Wheels on Vehicle Aerodynamics
Authors: Li Ting , Jia Qing , Yang Zhi Gang
Published: December 2012

Full scaled simplified model and production vehicle were applied to make a research on the local and global flow characteristics. Two different conditions including stationary and rotation were employed in computational simulation by steady RNS Navier-Stokes calculation. Further, detailed analysis on flow, surface pressure coefficient, drag coefficient and lift coefficient affected by rotating wheel figure out that rotating wheel has a significant influence on the flow around wheel and vehicle. Pressure difference, drag coefficient and lift coefficient are decreased by rotation, which improve aerodynamic performance.
Decision of the Wind Power Projects Based on Cost-Efficient Method
Authors: Gao Hong , Gao Wu , Lu Guo
Published: December 2012

To start from the investment characteristics of wind power projects, account for wind power projects in the life-cycle costs and project income, decision analysis and application of cost-effectiveness of wind power projects, the final project decision makers come to the scientific and rational decision-making program. To carry out the analysis of the case by cost-effectiveness, then come to a scientific and rational conclusion.
Heavy Metal Accumulation Characteristics of 3 Pioneer Plants in Wasteland of Coalmine Tailing in Mingshan
Authors: Liu De Liang , Wang Kai Feng , Yang Qi He
Published: December 2012

Accumulation characteristics on 7 heavy metals of 3 indigenous pioneer plants (Ageratum conyzoides, Comnyza canadensis, Miscanthus floridulus) & their rhizosphere soil was investigated in wasteland of coalmine tailing in Mingshan. The chief results were as follows: (1) soil pollution was mainly due to the compound Cd-Mn-Cu, of which Cd average content of soil was 2.052 mg/kg (between 0.759 to 3.109mg/kg) and much higher than the national secondary standard of GB 15618-1995 (Environmental quality standard for soils in China), and of which Mn average content of soil was 421.215mg/kg (between 387.057 to 488.660 mg/kg) and serious pollution, and of which Cu content was 91.281mg/kg (between 39.522 to 270.308mg/kg) and had certain pollution but not so serious; (2) the absorption and accumulation ability to the Ni, Cd, Cu, Pb, Zn, Mn and Cr of soil heavy metal among 3 indigenous pioneer plants & their different parts of the plant such like the root, stem, and leaf was not the same, on the whole had the synergistic and antagonistic effect for 7 ele-ments in 3 plants, of whom Ageratum conyzoides had an obvious synergistic action for Ni, Cu, Pb, Zn and Mn absorption and was beneficial to suck up further elements from the soil in wasteland of coalmine tailing, and of Comnyza canadensis and Miscanthus floridulus had different synergistic and antagonistic effect for 7 elements, especially Comnyza canadensis and Miscanthus floridulus were the Cd hyperaccumulator plants. (3) Heavy metal content of Miscanthus floridulus in the body was the lowest, and its enrichment coefficient, translocation factor was obviously lower than that of the other 2 plants too, so absorption mechanisms to heavy metal of Miscanthus floridulus could been believed as excluders, relatively Mn, Pb, Zn, Cu and Ni content in the over-ground parts of Comnyza canadensis and Miscanthus floridulus & their enrichment coefficient, translocation factor was rather high, and their absorption mechanisms to heavy metal belonged to accumulators.
A Basic Analysis of the Application on Linux and μC/O Dual-Core Embedded Operating System in Engineering Practice
Authors: Li Lin , Shan Chan Ji , Luo Jun , Xu Nan
Published: December 2012

With the development of linux and μC/O dual-core embedded operating system, its research areas have been broadened wider and wider. This paper aims to illustrate its importance in engineering practice on the basis of its application in the technological process of injection molding machines and numerical control machines to arrive at its natural conclusion that dual-core system has a brighter and wider prospect by using Linux and μC /OS to solve the problems of Linux because it is more and more widely applied in engineering, mechanical control systems and many other fields such as mobile communications as well as digitalized network, and now is becoming more and more demanded with the rapid development of scientific technology.
Petroleum Contaminated Soil Remediation Using Six Wild Plant Species in the Yellow River Delta
Authors: Xu Hui , Xie Wen Jun , Lu Zhao Hua
Published: December 2012

The tolerance and remediation efficiency of six local wild plant species in petroleum-contaminated soils in the Yellow River Delta were conducted at three contaminated levels, i.e., uncontaminated soil (control), soil contamination by petroleum at 1.48% (w/w, TI), and soil contamination by petroleum at 2.96% (w/w, TII). After 60 days, six plant species showed different petroleum contamination tolerance and degradation capability in soil. The degradation ability of Setaria viridis, Alopecurus pratensis and Echinochloa crusgalli(L) Beauv was significantly higher than that of Festuca elata, Eleusine indica (P<0.05). Suaeda salsa had the least degradation ability. Plant had the high ability to degrade petroleum in the weak pollution soil, which might be due to the low re-straining effect on plant growth. Based on their petroleum contamination tolerance and removal ef-ficiency, we suggest Alopecurus pratensis, Setaria viridis, Echinochloa crusgalli (L.) Beauv and Festuca elata are suitable for petroleum-contaminated soil remediation in the Yellow River Delta.
Research and Realization of Mineral Resources and Reserves Dynamic Calculation Module Based on MapGIS
Authors: Zhang Jian Keng , Wu Qian Hong , Wu Wang Run , Chen Sai Qun
Published: December 2012

In terms of the spatial and temporal characteristics of the mineral resources, the demands of the work to coordinate with Ministry of Land and Resources concerning overall dynamic inspections and managements of mine reserves, based on market economy model, an dynamic estimated module of minerals resources and reserves, which is able to dynamically analysis and inspect the dynamic changes of mineral resources and reserves in space and time, is made in correspondence with the actual deman with computer technology and GIS technology. This module is developed through MapGIS re-develop tools with the utilization of visual programming language C#, in order to realize the functions of dynamic adjustment of industrial indicators such as cut-off grade adapting to the market price and cost, quickly calculation and dynamic analysis of mine reserves, the interactive and rapidly delineation of ore bodies and automatic mapping and output of prospecting line profile map, which will greatly improve work efficiency and the level of management of mining companies so as to increase the economic benefits.
Study of a Numerical Control DC Power
Authors: Zhang Zeng Lin , Han Wen Ting , Chen Jun
Published: December 2012

At present, in view of the status that the common DC power supply output voltage is fixed single, non-adjustable and practicality poor, this paper introduces a kind of numerical control power system that has many source output by using switch power supply circuit technology. The output voltage of the power based on single chip technology is numerical control adjustment. The major component of the power is voltage regulator circuit, input over-voltage protection circuit, output over-voltage protection circuit, DC/AC conversion circuit, filter circuit and full-bridge circuit. The power can offer a variety of different stable voltage output values and has display function. Through the PROTEUS software simulation and circuit testing, output effect of the power is good, practicability is great, and can be used as a variety of portable electrical universal power supply.
Study on the Lifting Weight Detection of Tower Crane
Authors: Shang Jin
Published: December 2012

To build the tower crane monitoring system is so important because of the accidents increasing in construction industry. Utilizing lifting weight ring to detect the goods weight is a reasonable way in such a system. Ring size should be considered in the situation to lift different weight goods. Through the definitions of two rings of the smaller and the bigger, the detected weight curves are explored. Through the simulation of tower crane operation, lifting weight curves are obtained and analyzed in different stages of starting, transmitting and ending. The experiments demonstrated that different weight level of goods should select the different size ring, and the detected weight data has its own attributes in different stages.
The Automatic Up-Down Material Manipulator Wrist 3d Design
Authors: Zhang Bin
Published: December 2012

The automatic up-down material manipulator wrist requirements compact structure, rational layout. The typical wrist structure has a variety of, this design wrist structure for step motor drives a turbine worm movement of the structure, main function is to drive the PAWS, make its can accurately to grab parts and placed parts. Operation mode for step motor drive worm and worm wheel rotation, and then drive the turn of the wrist. Through the design of the wheel of worm gear and worm gear design, step motor selection, etc, and then, a 3 d design, and gives a picture.
4WID In-Wheel Motor EV Driving State Estimation Based on UKF
Authors: Li Gang , Zong Chang Fu , Zhang Qiang , Hong Wei
Published: December 2012

According to the characteristics of the four independent drive (4WID) electric vehicles, the vehicle driving state estimation algorithm was designed based on the Unscented Kalman Filter (UKF). The algorithm used 3-DOF vehicle estimation model with the HSRI tire model. The 4WID EV longitudinal velocity, lateral velocity and side slip angle were estimated. The algorithm was verified through simulation experiment. The results showed that the algorithm could estimate the vehicle driving state more accurately.
Analysis of Split Torque Transmission System Load Sharing
Authors: Wang Rui Feng , Zhao Ning , Jia Qing Jian , Tao Li
Published: December 2012

A calculative model for parallel shaft split torque transmission system is presented, the model includes stiffness of shaft supporting, time-varying stiffness, damping, gear eccentric error errors, bearing eccentric errors, gear tooth thickness error, assembly error. Dynamic analytic model is built using the theory of equivalent mesh error and Newton method. The model was solved by variable step size forth/fifth-order Runge-Kutta method. The result shown all error affect load sharing in different way, one error deduced sharply can not improve load sharing obviously.
Collision Based Time Synchronization for Underwater Sensor Networks
Authors: Guo Ying , Liu Yu Tao
Published: December 2012

To synchronize nodes’ time in mobile underwater sensor networks, a collision based time synchronization scheme called “Coll-Sync” is proposed, which is a novel time synchronization approach for underwater acoustic environment. Collision has been identified as a major challenge to communication, and current systems implement sophisticated solutions to detect and avoid it. Coll-Sync shows that collision contains highly useful information that can be leveraged to improve time synchronization greatly. It is the first time synchronization algorithm that does not suffer but benefit from collision in underwater acoustic channel. Simulation results show that Coll-Sync has high precision and low energy cost. It significantly outperforms existing time synchronization schemes.
The Application of CPLD in the Programmable Sample-Encoder of Telemetry System
Authors: Wang Yue , Zhang Xiao Lin
Published: December 2012

This paper will discuss the design methods of the programmable sample-encoder in the telemetry system, and compare the advantages of the design methods due to the development of the nowadays micro-electronics technology. To fulfill the requirements of combination, seriation, universalization and miniaturization for the equipments on the craft, the design of the programmable sample-encoder in the telemetry system adopts the CPLD control mode. This paper introduces in detail the main function of the CPLD realized in the programmable sample-encoder and the design method of CPLD. The performances of the sample-encoder such as bit-rate, format and so on can be programmable by using CPLD, meantime, the design input, verification and function-simulation can be realized by using the advanced EDA.
The Monitoring of the Belt Protection Switch Based on CANopen Protocal
Authors: Zong Ming , Shi Jie , Zhou Yin Feng , Sun Yi Dan
Published: December 2012

In order to guarantee the belt conveyor reliable operation, it is necessary to find and ruled out the possibility of failure. This paper introduced the CAN bus technology and in its’ application use the CANopen protocol which is windly used in the internation to complete timely and effective monitoring of the switch.
Optimization of Hybrid Turbocharger Applied on Common Rail Diesel Engine with Exhaust Gas Recirculation
Authors: Tian Feng , Ren Guo Feng , Yan Bin , Ao Guo Qiang , Yang Lin
Published: December 2012

Turbocharger is an effective technique to achieve higher thermal efficiency reduced emissions. And hybrid turbocharger is proven to be a promising technique to eliminate the well-known 'turbo-lag' effect of the turbocharger. In this paper, a global optimization of hybrid turbocharger technique with variable geometry turbine and exhaust gas recirculation was carried out. The diesel engine was modeled by GT-SUITE software, which is a 1D simulation environment. Moreover, a dynamic programming based optimizer, which was developed in Simulink, was integrated with the diesel engine model. Simulations results show that the optimized parameters can improve the engine fuel economy significantly under Chinese typical urban driving cycle.
The Research of Internal Control Evaluation Based on Fuzzy Comprehensive Evaluation Method
Authors: Lin Zhi Hong , Guo Ting Ting
Published: December 2012

Internal control evaluation is very useful to strengthen internal control, and to establish a scientifically target system is one of the key points of internal control. This article proceeds with the basic procedures of internal control, puts forward a target system, establishes a fuzzy comprehensive evaluation model based on fuzzy comprehensive evaluation, and people can utilize the model with some practical data of internal control in order to provide help for internal control evaluation.
One Approach for Direct Torque Control Switching Voltage Vector Selection
Authors: Wang De Cheng , Liu Er Hao , Lin Hui
Published: December 2012

Direct torque control selected switching voltage vector according to torque hysteresis comparator output, flux hysteresis comparator output, and sector. One switching voltage vector selection approach was proposed. It used support vector regression machine to carry out direct torque control switching voltage vector selection. The selection of eight switching voltage vectors was an eight classification problem. This classification problem was changed into regression problem by support vector regression machine. The nonlinear function used for switching voltage vector selection was gained by support vector regression machine training. Asynchronous motor direct torque control simulation result shows feasibility and effectivity of proposed method.
In-Depth Analysis of Bocce Backhand Throw and Hitting Technology Based on Mechanics Mechanism
Authors: Shi Qun Ying
Published: December 2012

The bocce movement is a sport, loved by the masses and the sports field in the early development of the technology is more mature. But sports competition is growing as bocce, bocce technology more and more attentions, especially backhand throw to hit the technology. Backhand throw strike technology is the analysis of bocce on the basis of this paper, the establishment of a backhand throw to hit the mechanical model, and thus, by experimental analysis and summary of the key factors affect the backhand throw hit effect, and thus to improve backhand throw hit technology to provide the theoretical and experimental basis.
Lane Keeping Control of Vehicles with Tire Model
Authors: Tong Guang , Wang Qiang , Jin Xiao Xiong
Published: December 2012

To overcome traffic congestion problem and driving safety issues on highway, automatic lane keeping control of vehicles has become an attractive area of research. In this paper, an adaptive lane keeping control scheme for vehicles is proposed. An estimator for unknown curvatures of target lanes is developed and a method to design ideal transient responses is proposed. Finally, an adaptive steering controller to achieve ideal responses is developed. Lane keeping performance can be easily improved by setting only one design parameter and unnecessary high frequency vibration is hard to occur in the steering control input.
An Intelligent Sliding Mode Control Scheme for Stabilized Platform of Rotary Steering Drilling Tool
Authors: Zhang Yuan Tao , Li Tai Fu , Yi Jun
Published: December 2012

Considering the nonlinear and uncertain influencing factors on stabilized platform of rotary steering drilling tool under work condition, a new intelligent sliding mode control strategy is presented for stabilized platform. The system robustness is ensured by sliding mode control. The upper bound of overall uncertainty is nonlinear approximated by RBF neural network, which can make the uncertain upper bound adjust adaptively. The chattering is reduced by quasi-sliding mode method. Finally, particle swarm optimization algorithm is applied to search the optimal controller parameters, including boundary layer thickness, switching function coefficient and adaptive parameter of neural network weight, Simulation results show that this control scheme can make stabilized platform get a good control performance and robustness.
Cognition on the Strategic Position of the Equipment Manufacturing Industry
Authors: Rong Hong Qing
Published: December 2012

Today in China's modernization, the key to establish its international political and economic status is to enhance the overall level of the equipment manufacturing industry. This requires us to have a comprehensive understanding to the overall level of equipment manufacturing industry in our country and thus be able to suit the remedy to the case. This article makes a not targeted analysis on the understanding of the equipment manufacturing industry in our country, and puts forward workable ideas and suggestions for reference.
Study on DVR Based Fault Current Limiter
Authors: Xu Yu
Published: December 2012

According to the operation principle of the DVR and analyzing of FCL’ s (fault current limiter) control objectives, this paper presents a new way that can fulfill the multiple control of the DVR. By using different kinds of control modes, it can make the DVR do the same way as FCL. It also establishes a single phase model basing on this theory. At last, it points out the future application of this new theory.
Review on Airtight Fatigue Strength Research of the New Generation High-Speed Train
Authors: Qin Fang , An Chao , Gao Xiao Feng , Zhang Le Le
Published: December 2012

Structure failure risk caused by air wave on high-speed vehicle airtight body is considered and it’s necessary to bring out the conception of airtight fatigue strength and start related research. There is a review of airwave and structure fields, including air dynamic of rail-vehicle, load carrying structure and strength test standard. Nowadays, the direction of air dynamic research is focused on how to reduce air wave pressure and enhance stability of running vehicle; the structure study is focused on static and transient load carrying response of wheels, bogie and so on structures under traction running and weight load. It’s not been fully researched that how the airtight structure vehicles response when carrying air-dynamic in long run. Based on current research, an analysis line is brought out which contains simulation and experiment, fluid-structure interaction study and structure fatigue assessment calculation
Research and Application of Location Assignment and Routing Strategies in Block Storage Yard of Shipbuilding
Authors: Tao Ning Rong , Cui Xiu Fang , Jiang Zu Hua , Chen Yun
Published: December 2012

In shipbuilding, the storage yard is used to store assembly blocks of ships. It is an essential part of the shipbuilding system.The storage yard management contains:determining the exact storage locations for the arriving blocks, and determining the storing or retrieving route for each block. Aheuristic approach was proposedto maximize the space utilization and minimize the obstructive. Based on the approach, a storage yard management systemwas built.The system is used by the planners and got positive effect.
Derivation of the Air-Fuel Ratio on the Mixing Burning Based on the Flow Series
Authors: Huo Ping , He Zong Hui , Jia Jing Bo
Published: December 2012

In the mix burning technology of burners, the reasonable air-fuel ratio is the foundation of fully burning. At the scene, as the flow rate of associated gas changes, the optimum air-fuel ratio decided in the flow rate of associated gas instability, it become the key to ensure full combustion of mixed fuel. In this paper, the flow rate of associated gas is divided into several flow intervals, with test data and theoretic, the optimum air-fuel ratio is obtained, corresponding to the flow rate of associated gas in the mix burning technology. The instances show that if the mix burring process is controlled based on air-fuel ratio obtained, the flames are stable and it is also energy-conserving. In addition the emissions are lower than the national standard GB/T 19839-2005 rules.
Sensor Optimisation for in-Service Load Measurement of a Large Composite Panel under Small Displacement
Authors: Ramazani Mohammad Reza , Sewell Philip , Noroozi Siamak , Koohgilani Mehran , Cripps Bob
Published: December 2012

Current methods to estimate the behaviour of composite structures are based on trial and error or oversimplification. Normally the nonlinearities in these structures are neglected and in order to cover this inadequacy in design of composite structures, an overestimate safety factor is used. These methods are often conservative and leading to the heavier structures. A novel technique employs Artificial Neural Network (ANN) as an inverse problem approach to estimate the pressure loads experienced by marine structures applied on a composite marine panel from the strain measurements. This can be used in real-time to provide an accurate load history for a marine structure without requiring knowledge of the material properties or component geometry. It is proposed that the ANN methodology, with further research and development, could be utilised for the quantification of in-service, transient loads in real-time acting on the craft from the craft’s structural response (strain response to load). However, to fully evaluate this methodology for load monitoring of marine structures further research and development is required such as sensor optimisation. The number of sensors should be minimised to reduce the time to train the system, cost and weight. This study investigates the number of sensors required for accurate load estimation by optimising the method.
The Thermal Characteristics Analysis of a Super Hydrostatic Guideway
Authors: Wang Jian Hua , Du Wei , Liu Zhifeng , Cai Li Gang
Published: December 2012

This paper established the finite element model of a hydrostatic guideway. Based on the thermal characteristic simulation analysis, the temperature field and thermal deformation of the guideway were obtained. The analysis results show that the oil film temperature increment will cause thermal deformation of the guideway and processing errors. The errors will influence the machining accuracy of machine tools. The analysis results provide certain theory basis for the research on the above influence. And then the results also give certain reference for the research on the thermal error compensation of machine tools.
Optimization of Machining Parameters during Drilling of 7075 Aluminium Alloy
Authors: Golshan Abolfazl , Ghodsiyeh Danial , Gohery Scott , Ayob Amran , Baharudin B.T. Hang Tuah
Published: December 2012

Proper selection of drilling parameters is one of the significant challenges in drilling process. In this study, a new method for selection of optimal machining parameters during drilling operation is investigated. The present study deals with multiple-performance optimization of machining characteristics during drilling of 7075 aluminum alloy. The most commonly-used material in aerospace industry is aluminum alloy with zinc as the primary alloying element. The drilling parameters used for this experiment include cutting speed, feed rate and drill diameter while the two output parameters are surface roughness and dimension error. These outputs are specified to be optimized as a measure of process performance. The statistical model is generated from linear polynomial equations which are developed from different output responses when the machining parameters are changed. The Non-dominated Sorting Genetic Algorithm optimization results show high performance in solving the present problem.
Carbon Materials Electrodes: Electrochemical Analysis Applications
Authors: Hua Xin , Shen Gui Jun , Du Yu
Published: December 2012

The electrochemical properties of traditional carbon materials and applications of these materials based electrodes as well as physical and chemically modified carbon materials electrodes would be reviewed. Hence, the scope of the current review is limited to analytical electrochemistry using carbon materials electrode, and 48 references are cited.
Creep Behaviors of Stress-Relieved and Annealed Zr-1Nb-0.7Sn-0.1Fe Nuclear Cladding Tubes at Intermediate Temperatures
Authors: Lee Jong Min , Hong Sun Ig
Published: December 2012

In order to explore the possibility of enhanced creep resistance by grain size control, creep tests of stress-relieved and annealed Zr-1Nb-0.7Sn-0.1Fe cladding tubes were carried out at intermediate temperatures. The creep rate decreased significantly with increase of grain size from ~1.2 μm to 4 μm with annealing. The stress exponent was observed to be in the range of 5.0~6.5 for both stress-relieved and annealed Zr-1Nb-0.7Sn- 0.1Fe, suggesting that the dislocation climb is the rate controlling creep mechanism. It was shown that not only the creep rate decreased but also creep life increased in the annealed Zr-1Nb-0.7Sn-0.1Fe, suggesting the grain size control may provide an effective way to enhance the creep resistance in Zr alloys for nuclear application.
Abrasion Wear of Heterogeneous Materials
Authors: Makarova Natalya Valentinovna , Polonik Marina Vasilyevna
Published: December 2012

This research is devoted to the decision of a problem of modeling the wear process of concrete. In paper presents a wear model of concrete as heterogeneous material on the basis of the theoretical and experimental contact mechanics methods approach. The model predicts that its abrasion strength depend on physical and geometrical characteristics of cement matrix and aggregate. The theoretical modeling of a surface with the strengthened ore softening areas is applied to optimization of concrete structures. The experimental results support these theoretical predictions.
Nanocomposited and Functionally Graded ZrN/HA Coatings on cp-Ti by RF Magnetron Sputtering
Authors: Nathanael A. Joseph , Lee Jun Hee , Hong Sun Ig
Published: December 2012

Nanocomposited and Functionally graded (FG) ZrN/hydroxyapatite coatings with good mechanical strength and biocompatibility were prepared on cp-Ti substrate for biomedical applications and detailed analysis of the nanocomposite coatings for its structural, morphological, topographical and biocompatibility properties were carried out. Crystallite size of the coating for the functionally graded coatings was smaller compared to that of nanocomposite coatings. The arrangement of grains was observed to be denser in the FG coatings due to the decrease in the grain size. Hardness and modulus of FG coatings were observed to be greater than those of nanocomposite coating, which was attributed to the reduction in the crystallite size in FG coatings. Both ZrN/HA nanocomposite and functionally graded coatings was found to induce biomineralization formation, suggesting both are promising candidates for the future biomedical applications.
Research on the Methods to Reduce the Energy Consumption of Ammonia Refrigeration System
Authors: Liu Chong , Cai Mao Li
Published: December 2012

In order to solve much energy waste of the ammonia refrigeration system, we analyze many parameters and processes in depth theoretical methods, experimental verification and numerical simulation in actual working condition. The results show that improve suction pressure and reduce exhaust pressure can reduce energy consumption of the system. The value of suction pressure and exhaust pressure is the optimal value when corresponding superheat degree and super cooling degree are 1°C. Control the pressure difference between inlet and outlet of compressor by increasing the exhaust pressure; the system is more stable and less energy loss. Take advantage of bypass channel to control the superheat degree is more effect than by evaporator itself. The air volume of condenser fans should adjust with its load and the outdoor dryness temperature. When the ratio approaches to the load one, the total energy consumption decreased obviously.
The Numerical Analysis of Leakage in Ultrahigh Pressure Seal Structure
Authors: Luan Zhi Bo , Pang Hou Hua , Tan Xiao Dong
Published: December 2012

This article states seal clearance and fluid leakage.By means of pressure distribution calculation and theoretical analysis, theoretically it establishs the mathematical model of the leakage with liquid material, the sealing structure and the fuel tank between the internal and external pressure.The whole processes on Matlab platform meet the complex engineering requirements,so the calculation process is simple and convenient. By calculating the results should be very intuitive, it closes to the sealing gap and leakage distribution curve. Thus, it is sure sealing clearance is the first element in the ultra-high pressure seal system.
Synthesis of Ni-CeO2 Nanocomposite Coatings by Electroforming
Authors: Qu Ning Song
Published: December 2012

In this paper, the effect of CeO2 nanoparticles content in the bath on the weight percent of CeO2 particles, morphology, texture, and high temperature oxidation resistance of the nanocomposite coatings was examined. With a rise in the loadings of CeO2 particles in the bath from 10 gl-1 to 40 gl-1, the CeO2 particles weight percent in the nanocomposite coatings gradually increases. Further increased the loadings of particles in the bath to 50 gl-1, the weight percent reversely reduces. The maximum of CeO2 nano particles weight percent in the nanocomposite coatings is 4.98 wt% obtained at current density of 3 Adm-2 from the bath containing 40 gl-1 CeO2 particles. The high temperature oxidation resistance of Ni-CeO2 nanocomposite coatings significantly rise compared with that of bare nickel coatings, and enhanced with a rise in the loadings of CeO2 nano particles from 10 gl-1 to 30 gl-1. The wear resistance of deposits is also consist with the nanoparticles content in the bath。