bluuebunny/crossref_metadata_2025 huggingface dataset:
Preparation and Characterization of Lizardite
Authors: Zheng Shu Min , Wang Kai Ming
Published: May 2014

Lizardite were synthesized by hydrothermal reaction in an Fe3+doped solution/environment using nanometer SiO2and MgO as precursors. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), fourier transform infrared spectroscopy (FTIR). The results show that: the synthetic samples are lizardite with a thickness ranging from 60 nm to 200 nm in the temperature range 200°C~230°C.
Friction Type Monorail Crane Driving Design and Analysis Based on ANSYS
Authors: Tu Wei Wei , Li Han
Published: May 2014

This research is focused on Friction Type Monorail Crane Driving,using Solidworks software to establish three-dimensional model.Based on Ansys finite element analysis was introduced, the intensity and the structure optimization design. Monorail friction drive device is given in the stress analysis of different cross section.According to the result of the figure analyzes the stress of different locations will effect the performance of the drive.Provides a theoretical reference For optimizing the structure of improving driving devices and improving the performance of drive device.
Structure Design and Optimization of 1500t Hydraulic Powered Experimental Platform
Authors: Sun Zhen Zhen , Hu Ya Lin , Men Fei Wu , Ji Li
Published: May 2014

A hydraulic powered experimental test platform was designed by using molding software Creo/Parametric. Key design point of major components base of test platform, portable beam and upright post were proposed. The loading ways on top-beam unbalanced loading ,torsion loading ,and diagonal loading were taken into account to apply on the test platform, and the distribution of stain and stress on three loading model were obtained by software ANSYS workbench. With the result ,optimization of the structure of the test platform were put forward.
Research Status and Development Trend of Vane Pump
Authors: Bai Jing Jing , Xu Man Man
Published: May 2014

The classification, working principle and structure characteristic of vane pump was introduced. Combined with the research and development status of vane pump at home and abroad. It Main, introduced the single-acting vane pump and the working principle of double-acting vane pump, its development trend was summarized, which promote the development of vane pump technology.
Research on Dynamic Optimization Principles for Forklift Truck Mast
Authors: Zhang Ke Jun , Chen Jian
Published: May 2014

In order to improve the effect of dynamic optimization design for forklift truck mast,the influence factors of dynamic performance for forklift truck mast were analyzed. Combining the actual characteristics of the forklift truck mast, considering the influence factors of dynamic performance for forklift truck mast, seven dynamic optimization design principles for forklift truck mast were proposed. According to the dynamic optimization design principles for forklift truck mast, the 2.5 ton forklift truck mast was designed and analyzed. The simulation results show that forklift truck mast which was optimized has good dynamic performance. The dynamic optimization principles which were proposed can improve design quality of forklift truck mast.
Modeling of Shield Machine Tunneling Experiment by Discrete Element Method
Authors: Wu Li , Liu Chang
Published: May 2014

To discover the interaction rules between the cutterhead of shield machine and the soils, the model experiment of shield machine tunneling is performed, and the particle discrete element model of the experiment is built. By adjusting the particle parameters, the simulated cutterhead torque is compatible with the experiment observed results. Then the displacement of soils in the front of the cutterhead, behind the cutterhead, and in the front of the chamber board is obtained. The soils in the front of the cutterhead try to flow into the nearest opening. However, the soils behind the cutterhead move toward the wall of out barrel. The movement of soils in front of the chamber board is in accordance with the rotation direction of the cutterhead.
Singularity Analysis and Simulation of 3-PRRR Parallel Mechanism
Authors: Zhu Ya Ya , Fu Tie , Ding Hong Sheng , Wang Yan Ming , Wang Yong Jie
Published: May 2014

A new 3-DOF parallel mechanism is presented and its kinematics analysis model was established based on the vector method. Based on the speed equations of the mechanism, its singular conditions and singular configurations were analyzed systematically. Moreover, a given mechanism’s singularity was simulated by using cylindrical coordinate search method based on its inverse displacement solutions. The results show that the workspace of mechanism with outset chains is much bigger than mechanism with inset chains. The analysis and simulation on singularity provide a theoretical basis for the dimension synthesis and optimization of this kind of parallel mechanism.
A Comparative Study of Three Different Airing Ways of Fermented Grain in Brewing of Luzhou-Flavor Baijiu
Authors: Long Ke , Ao Zong Hua , Ma Ying Ying , Yang Jian Gang
Published: May 2014

Airing on-field, airing on-bed and airing on-machine are the usual way on production of Luzhou-flavor liquor. The essay makes a brief introduction about the three airing ways, at the same time it researches the effect of different airing ways on fermented grains and pits fermentation. As the way of mechanization airing, the machine of airing absolutely meets the technology demand on the production of Luzhou-flavor liquor, moreover, it has saved labor. Furthermore, it not only benefits for the stability and uniformity of fermented grains, fermenting, but raises productivity of liquor.
Numerical Analysis for Braking System of Virtual Automobile Model
Authors: Yu Dong Man , Li Xiao Jing , Wang Di
Published: May 2014

The excellent braking characteristics is a key security measure for automobile operation. The study focuses on modeling and parameter settings of brake system, tire system and body system. During automobile design stage, a full model of automobile is established in ADAMS software circumstance in according to structural feature and main parameters. Virtual model technology can simulate the working condition, analyze whole performance of related products, solve some drawbacks in the traditional design and manufacturing process. Based on the requirement of country standard and national standard, the braking performance analysis and appraise is carried out in this study, at the same time, the braking performance is optimized.
Study on Crystal Morphology and its Formation Mechanism
Authors: He Tao
Published: May 2014

Crystal quartz mineral belongs to the mineralogy of quartz family. Colorless crystals formed when pure, can form different types of color centers when containing trace elements such as Fe, the article mainly studies the crystal morphology of the different characteristics and to further explore the mechanism from the chemical synthesis of crystal morphology formed mechanism.
The Automotive Brake Reaction Model Analysis under Moods Fluctuation
Authors: Cheng Li Jia
Published: May 2014

The traditional vehicle baking model can’t analyze the uncontrolled factors of the drivers at night due to moods fluctuation which cause large errors for estimation of the brake distance, thus the effective driving emergency braking reaction model can’t be built. This paper proposes an intelligent emergency braking reaction model under moods fluctuation which can analyze the drivers’ control features under different moods and build the relation models between the braking distance and driving speeds. The paper selects driving speeds, average road brightness and moods fluctuation as three indexes to calculate the best braking reaction speeds in order to control the emergency brake intelligently. The experiment illustrates the drivers’ braking reaction speeds and the stability can be greatly improved under the model with strong robustness.
Design and Simulation Research on a New Type of Movable Wedge – Ball Overrunning Clutch
Authors: Wang Peng , Li Ping Kang , Kong Ling Liang
Published: May 2014

Firstly, a new type of Movable Wedge – Ball Overrunning Clutch (MWBOC) with separable control part has been proposed in this paper. With the axial arranged and detachable structure, the clutch could adjust the self-locking components conveniently and its driven part could rotate freely to control part. The mentioned special structures make the clutch more universal, flexible and lower maintenance costs. Then, according to Hertz Contact Theory, the static structural design and stress check has been implemented. Finally, relying on simulation on the established dynamic model, it can be proved that: With the designed structural parameters, the newly-designed controllable overrunning clutch could realize the designed functions reliably, and the requirements for dynamic performance indexes could be met also.
Project supported by National Natural Science Foundation of China (Grant No. : 61074104 )
Tire Crushing Equipment Hydraulic Workstation Design
Authors: Liu Ying , Yu Ke Long
Published: May 2014

Tire crushing equipment in crushing the whole tire processing machinery, plastic blocks larger particles using a hydraulic motor driven mechanical crushing. Tire crushing confidential solving process running overload and load startup. The main problem of large particles of plastic blocks using a motor-driven mill is overload protection and load startup. Fluctuation range of shear crushing big tires, large particles occurred requires the use of shears occur when the machine shut down and set the material inside the machine clean. The machine can be restarted. Hydraulic motor with commutation convenience and load startup characteristics. Hydraulic fluid power source as a workstation can provide power for each processing machinery and complete sets of equipment. Working pressure of hydraulic station design includes a power driven mechanical calculations, the hydraulic system. Choice and control hydraulic system, control the temperature of the hydraulic oil , mechanical work , such as the determination of the content of the component.
Optimization Design of EMU Process Bogie Wheel Frame Based on ANSYS
Authors: Dai Jun
Published: May 2014

According to the saw blade for process bogie structure characteristics,the use of Pro /E 3 d software based on the 3 d model,with ANSYS software,a static and modal analysis,obtained the stress pattern,structure deformation diagram and the former 6 order natural frequency and modal shape. The analysis results show that the node the maximum equivalent stress and the maximal displacement nodes are within the scope of the provisions,the data are meet the requirements,frame structure overall stiffness is better,frame has good static characteristic and dynamic characteristic,can meet the design requirements.And on this basis to frame was further optimized,so as to save materials,reduce cost.The theoretical basis is provided for the development of the process bogie .
Simulation on Influence of Two-Stage Warhead Penetration at Different Obliquity Angles
Authors: Huang Xue Feng , Wang Wei Li , Fu Lei , Jiang Ying Zi
Published: May 2014

In order to study the influence of the Two-Stage warhead penetration with obliquity angle, used finite software LS-DYNA to simulate the process of the two-stage warhead attacking double equivalence target with different obliquity angles, analyzed the influence of residual velocity, shell and inner structure strength of the two stage warhead at angles. The results show that when the obliquity angle increase, it has little affect to residual velocity, but the strength of last stage warhead shell and inner structure facing austere influence and the deformation aggravate.
Clock Domains Cross FIFO Interface Design of Multichannel Continuous DDR2 Read and Write
Authors: Wang Guo Cheng , Ma Yan Peng , Lu Hai Tao , Chen Xuan Qi , Li Ping
Published: May 2014

In this paper, a clock domains cross FIFO interface of multichannel continuous DDR2 read and write is designed. The interface provides continuous data stream from DDR2 to 12 different channels simultaneously. Four core issues are resolved: mismatch on bit width between DDR2 user interface and the channels, data stream conversion control from DDR2 to channels, clock domains difference between DDR2 and channels, Discontinuous process of DDR2 read and write. DDR2 storage spaces are partitioned for matching data width of the DDR2 user interface and the channels, and to achieve the maximum utilization of the DDR2 memory. Via state machine, data conversion and synchronization from DDR2 to channels are implemented, and the state machine can be applied to providing continuous DDR2 data to any numbers of channels simultaneously. Cross clock domains FIFO interface goes to solve the different clock domains problem between channels and DDR2. When bank or row addresses conversion occurs, or DDR2 auto-refresh cycle comes, DDR2 cannot be read or written, leading to data interruptedly in time aspect. To solve the problem, the FIFO interface is designed followed the full-mode handshake protocol. Through the interface caching, the 12 channels can continuously read data from the DDR2 simultaneously. The final design can achieve the goal that under the fastest case, DDR2 provides 12 channels data stream simultaneously at 61.538 MHz rate at the same time, and 90.566% efficiency in the reading and writing aspects.
Research on Response of Log-Periodic Antenna (LPDA) to Square Wave Pulse in GTEM Cell
Authors: Sun Xiao Ning , Wang Qing Guo , Zhou Xing
Published: May 2014

In order to study the response of the log-periodic antenna (LPDA) to a square wave pulse, it has been irradiated in a square wave pulse using GTEM cell and high-frequency noise generator. And the waveform and frequency spectrum signals are measured. Before the test, the pulse field in GTEM cell has been calibrated. The results showed that field intensity in it changes with the voltage varies linearly strictly at the same point, but with the height of core plate increases, the field intensity decays exponentially but not strictly linear attenuation relationships. Experiment results show that it is feasible to acquire antenna’ square wave pulse response using GTEM cell, and the results is instructive for the analysis of the impulse response and protection for a log-periodic antenna.
Research on Reduced Scale Experiment of Induced Overvoltage on Distribution Line
Authors: Huang Ying , Tang Bo , Yu Zhan Qing
Published: May 2014

Lightning is one of the most important reason of outage of distribution line. And nearly 90% of the accidents of lightning failure is result of lightning induced overvoltage. In order to protect the distribution line from lightning, it is required to have a comprehensive understanding of characteristic of lightning induced overvoltage. Due to the advantage of reduced scale experiment, which are controllable and practical, the characteristic of lightning induced overvoltage is got from it. Comparing the results of experiment with the results of calculation, it is found that changes of overvoltage with height and distance match well with the calculated results, which show that the reduced scale experiment is effective and proper.
Regular Expression Matching Algorithm Based on FPGA Circuit
Authors: Guo Cheng Qing , Xu Jun Feng
Published: May 2014

With the rapid development of network bandwidth, the matching-performance of regular expression is gradually of crucial importance for networking security. There are many hardware acceleration designs of regular expression matching on the basis of NFA and DFA, of which NFA designs require more logic circuit resources while the DFA designs more memory resources. However, because there are too many states and transition edges in DFA, the performance of DFA is much inferior to the performance of NFA. In this paper we designed a DFA regular expression matching algorithm fully based on FPGA logic circuit. The algorithm exploits the feature of DFA that many transitions for a state may have the same next state pointer and setting a default transition for each state of DFA will result in the reduction of logic circuit and the simplification of the electronic circuit. To evaluate performance, this DFA algorithm was mapped onto the Altera Cyclone FPGA, and got the experimental results based on the L7-filter rule set. The performance of the DFA algorithm acquired an approximate performance compared to the NFA algorithm. Experimental result shows that, compared with the NFA algorithm, in the improved DFA plan, 10% rules got a higher throughput, reaching 60% in the best case; while 62% rules cost less logic resources, saving 87% logic resources in the best case.
Analysis on Suddenly Stop Running Effect of Wind Turbine in Power System
Authors: Tan Xiao Long , Zhou Jia , Wang Wen Bin
Published: May 2014

Wind speed of the time-varying bring many security hidden danger to the operation of the wind turbine, especially under the condition of the wind speed is too low or the wind speed is too large, wind turbine control device can make the wind machine stopped running, at this time on the stability of power grid and significant influence on the distribution of electric power system. Therefore, based on the simulation platform of PSCAD/EMTDC software was carried out on the wind turbine when suddenly stop running of power system modeling and simulation, research on power system transient changes at this moment.
Research Progress of High Quality Silicon Steel Magnesium Oxide
Authors: Wu Hai Hong , Luo Bi Jun , Gao Chun Juan , Zhang Yan An , Zhang Qi , Huang Xi Ping
Published: May 2014

Silicon steel magnesium oxide is a coating material used for preparing oriented silicon steel. In this paper, The preparation methods of silicon steel magnesium oxide and research progress of high quality silicon steel magnesium oxide preparation technology were introduced. The use of abundant brine resources in the preparation of silicon steel magnesium oxide was prospected.
Implementation and Application of Short-Time Fourier Transform on a New High Speed FPGA
Authors: Gui Gui , Qiu Li Peng
Published: May 2014

FPGA structures are common designed in Serial structure and Parallel structure. As the most efficient one, Parallel structure also could be divided into whole-parallel and half-parallel which we called pipe-line structure. Whole Parallel structure FPGA take a great advantage on speed but consuming enormous resources. Moreover, FFT cannot give enough details on Time-frequency domain. In order to avoid these disadvantages, proposed STFT processer plan on FPGA. Based on the research on algorithms STFT, we gave an improved pipeline structure FPGA design. Then this design implied high speed STFT which take both speed and precision into count on FPGA. At the last of this paper, we conducted signal test. In this step , any signals were all collected from actual work condition. And then verify the feasibility of the program through simulation and actual signal test.
Performance Study of GaAs Photovoltaic Power Converter in Optically Powered Systems
Authors: Yuan Xin Wei , Shi Jie Qin
Published: May 2014

Optically powered system is a revolutionary new power delivery system, in which optical power is delivered over fiber to photovoltaic power converter, where optical power is transformed into electrical power. Therefore the system is inherently immune to RF, EMI, high voltage and lighting effects. Capable of powering electronic circuitry by optical fiber, this technology has been validated in industries such as electric power, communications, remote sensing and aerospace. To a large extent, photovoltaic power converter is a key component that decides the performance of optically powered system. In this paper, the commonly used GaAs photovoltaic power converter is studied and tested. Parameter values like open circuit voltage, short circuit current, maximum output power, conversion efficiency and the optimum load resistance are obtained through experiment, which can be severed as important reference while choosing or designing DC-DC converter.
Application of Negative Resistance in the Inductor Feedback Oscillators Based on Multisim
Authors: Lei Yu , Ai Jian Feng
Published: May 2014

By analyzing three-point oscillator of inductance feedback with the loss resistance of the inductor,we found the loss resistance of the inductor is a major factor in affecting circuit performance. Negative resistance in series with loss resistance can offset the impact of the loss resistance in the circuit. Oscillation circuit Start-up easilier. The quality factor Q increases and the selectivity is better.The oscillation shape closer to the ideal oscillator.
The Effects of Voltage Level Number on Operation Characteristics of Modular Multilevel Converter
Authors: Li Jia Long , Li Hai Feng , Liu Chong Ru , Li Geng Yin , Lin Zhou Hong
Published: May 2014

The effects of total voltage level number (TVLN) on behaviors of the modular multilevel converter (MMC) are analyzed in this paper. First, it gives a brief introduction on the MMC system for how the converter generates multilevel staircase waveform. Second, the operation characteristics during the start process are analyzed. The capacitor voltage of a SM, the DC voltage, the exchanging power, and the DC loop current would be all influenced by different TVLNs. Third, the harmonic components in steady state are discussed to reveal the reason why the total harmonic distortion (THD) of the output voltage of MMC reduces when the TVLN increases. Simulation results show the validation of the conclusions drawn in this paper. Furthermore, when the TVLN is small, the THD in SUPWM method is lowest. However, when the TVLN increases, especially greater than 11, the THD in CPS-SPWM method is lowest.
Study on Matrix Converter Direct Switching Function Modulation Algorithm
Authors: Liang Jian Wei , Wang Tao , Zhang Chao , Chen Dong
Published: May 2014

This paper includes the topology and operating principle of matrix converter, and switching function modulation algorithm of the matrix converter is analyzed in detail. Simulation results based on Simulink7.11 are also provided, the result shows a good verification of theoretical analysis, and it provides a theoretical basis for the next research and software/hardware design of matrix converter.
A Wind Power Forecasting Method Based on Improved Support Vector Machine
Authors: Ke Hong Chang , Wang Hui , Kong De Gang
Published: May 2014

For the deficiencies of traditional wind forecasting method, a wind forecasting method based on improved support vector machine which support any parameters input. The method can compatible with many different types and magnitude data and construct a loop iteration mechanism, based on the wind farm's own situation which constantly prompts to enter the wind speed, season, temperature, humidity, light until it reaches the desired accuracy. For wind power consumptive capacity, the method proposed can obtain the maximum, minimum wind parameters and the range of variation, diverse support vector machine regression model can be produced by learning, which can predict the future of wind energy within a period of time. The method can improve the quality of wind power and grid scheduling, for maintaining grid stability has a very important role.
Research on IEC Type3 Wind Turbine Generator
Authors: Han Xian Sui , Liu Qi Hui
Published: May 2014

The dynamic model of DFIG for power flow calculation and transient simulation is proposed and becoming a hot spot of research. Based on the principle of DFIG model which is newly released by the International Electrotechnical Commission (IEC), analyzes model structure and the control block. The type 3 wind turbine generator (WTG) is implemented in PSCAD environment, Case studies under both normal and grid fault conditions are done with the implemented IEC generic models of type3 WTG, simulation results of IEC type3 WTG are compared with the full order model .The case study results show that the IEC generic models of Type3 WTG can correctly represent the performances of Type3 WTG under both normal and fault conditions, the validation of the model are verified, the model will promote the standardization of domestic wind turbine model, and provide correct and effective dynamic model of wind turbine for study of the wind power integration into grid.
Research on Calibration Method of Three-Phase Smart Meter
Authors: Wang Yong Jie , Zhang Hui , Wang Jie Ran
Published: May 2014

Specific to the parameters in the process of three-phase smart meter calibration, such as DC offset, AC offset, AC gain, etc. impact on measurement results, a design of a three-phase smart meter based on CS5463 chips is introduced in this paper. Through theoretical analysis, optimized calibration, and experimental verification, parameters such as voltage, current, active power, reactive power, apparent power, power factor can be measured by the meter. After calibrated, the voltage and current measurement accuracy of the three-phase smart meter can reach above 0.2%. It can meet the needs of the practical application.
Study on Shortwave Circular Adaptive Anti-Interference
Authors: Yin Li , Zhang Zhi Gang , Yuan Feng
Published: May 2014

Adaptive antenna array combines array antenna and adaptive signal processing technology together, and has the capacity of effectively restraining strong interference in airspace. The paper starts from the analysis on formation and array parameters, adopts the electromagnetic calculation software FEKO to make Circular array modeling and simulation, and optimizes the phase values of various array elements via genetic algorithm in the circumstances of taking SIR (signal to interference plus power ratio) and of not taking SIR into consideration separately to achieve the purpose of anti-interference, and the result shows that the optimization taking SIR into consideration results in more powerful anti-interference capacity of Circular array, and conforms to the needs of practical engineering more.
The Design and Realization of OBU in Free-Flow ETC System
Authors: Yan Chun Jie , Guo Jin Xu , Li Xin You
Published: May 2014

With the rapid increase of vehicles, road congestion problem is becoming increasingly serious, the ETC system requirements getting higher and higher, the railings ETC system is difficult to meet the requirements. This article uses the 5.8G RFID technology to gives free-flow ETC system's overall design, front-end design of key equipment of the RSU and OBU. The system operation results show that greatly improved the traffic speed, realize fully free flow, and achieve the design goal of free flow ETC system.
Design and Implementation of Data Management System for Low-Voltage Electrical Performance Test Based on Virtual Instrument Technology
Authors: Xu Wei , Zhao Yan Hua , Liu Ming Yu , Dai Ming Xing , Xie Qi , Xu Hui Gang
Published: May 2014

Low voltage electrical apparatus is the electrical appliances which play the role of on-off, control or protection in the circuit of AC voltage to the 1200V, DC voltage to1500V. The function of it will have a direct impact on the safe and reliable operation of the power system and industrial control system. It is needed to carry out an accurate test on the each function of them before they leave the factory. In order to ensure the accurate of the test data, it is worth studying on how to build a test data management system for low voltage electrical apparatus. Through LabVIEW establish a connection to the Access database technology. An independent data management system is developed.
Argument Forbuilding Feasibility of the General Electrical Parameters Test Platform for Smart Ammunitions
Authors: Zhang Xuan Gong , Xu Lu Tie
Published: May 2014

Due to lack of the general electrical parameters test platform for smart ammunitions, this paper discussed main technical parameters of the general electrical parameters test platform for smart ammunitions based on its test resource requirements, electronic measurement technology and response signal during stating the general detection system and the concrete structure of general test platform. The main technical parameters include sampling frequency, measuring range, resolution ratio and dynamic behavior. The construction of platform test software is also elucidated. At last, building feasibility of the general electrical parameters test platform for smart ammunition is proved at the theoretical level.
Research of the Industrial Furnace Temperature Control Based on DMC Algorithm
Authors: Meng Zhi Yong , Sui Chen Meng , Liu Lei
Published: May 2014

By introducing the existing lack of industrial temperature control algorithm is applied, leads to the advantage of DMC algorithm industrial furnace temperature control, the next from the prediction model, rolling optimization, feedback correction of the three aspects of the principle of DMC algorithm is fully explained, on this basis, the preparation of Matlab procedures, simulation of the DMC algorithm in industrial furnace temperature control, thus indicating DMC algorithm in the field of industrial temperature measurement is a method should be promoted.
Conjugate Unscented Particle Filter Based Monte Carlo Localization for Mobile Robots
Authors: Fei Jiang Xue , Yu Song
Published: May 2014

For mobile robot localization in known environment, the 5th-order Conjugate Unscented Particle Filter Monte Carlo Localization (CUPF-MCL) algorithm is proposed. CUPF-MCL combines the 5th-order Conjugate Unscented Transform (5th CUT) with Kalman Filter to generate more accuracy particle filter proposal distribution, calculating the transition density up to the 5th-order nonlinearity. In simulation, the performance of CUPF-MCL is compared with that of dead reckoning, PF-MCL, EPF-MCL and UPF-MCL. Results show that CUPF-MCL improves the accuracy of localization.
Improvement of Attitude Estimation Using Modified Rodrigues Parameters and Intelligent Controller
Authors: Liu Qiang , Gao Fu Yin , Wang Chang Gang , Han Yu
Published: May 2014

The attitude estimation method of attitude heading reference system (AHRS) using an Extended Kalman Filter (EKF) with a filter tuning algorithm based on fuzzy controller is introduced.The AHRS uses inertial sensors and magnetometers to calculate its attitude. It is known that the attitude update using gyros are prone to diverge and hence the attitude error needs to compensate using accelerometers and magnetometers. In this paper, a Kalman filter model with a state variables represented by Modified Rodrigues Parameters (MRP) is presented to improve the computational efficiency and a model changing algorithm is used to make the filter more robust to acceleration and magnetic disturbances.If the AHRS measures any disturbances which are caused by movement of the vehicle, using fuzzy controller changes the filter gain .Simulation results show, EKF tuned by fuzzy controller is correct method that makes robust to disturbances more properly ,Rodrigues parameters can improve the computational efficiency..
Adaptive Congestion Control with Time-Varying Uncertainties
Authors: Han Cun Wu , Sun De Hui , Liu Lei
Published: May 2014

Existing Internet congestion control algorithms did not consider time-varying uncertainties. This paper presents a new congestion control algorithm based on adaptive technique and robust H∞ approach, which can effectively compensate for the time-varying uncertainties. Simulation result shows that the proposed algorithm has good performance.
Study on Thermal Conductivities of Composite Adsorbents for Adsorption Refrigeration
Authors: Lin Yan , Gao Jiao
Published: May 2014

Twenty-four Cacl2/ENG molded composite adsorbents specimen were successfully prepared by aqueous solution and squeezing method. The thermal conductivities of the samples were tested by nanoflash LFA447. The experiment results show that: the thermal conductivity perpendicular to the direction of compression is over 1.2 times higher than that parallel to the direction of compression, which prove that the thermal conductivity is anisotropic. Within a certain range, the thermal conductivity is enhanced with increasing density and decreasing mass ratio. Under mass ratio is 2:1 and density rise from 600 kg/m3 to 700 kg/m3, thermal conductivity increase fastest. Density and mass ratio has coupling effect on the thermal conductivity of Cacl2/ENG molded composite adsorbents.
The Internal Model Control for Nonlinear System Based on LS_SVM
Authors: Zhang Sheng Bo
Published: May 2014

An internal model and an inverse model of nonlinear system were established based on LS_SVM. On this basis the algorithm of internal model control for nonlinear system based on LS_SVM was put forward. The simulation results show that the internal model and the inverse model of nonlinear have high modeling precision and strong generalization. What’s more the algorithm of internal model control for nonlinear system based on LS_SVM has good control performance, strong anti-jamming ability and robustness.
The Study of Intelligent Control in the Process of Overtaking
Authors: Cai Xiang , Chen Wu Ji , Song Mei Yang , Zhang Sui Yuan
Published: May 2014

In this paper,we have studied the overtaking process on the two-way four-lane highway in China by using the theory of multi-objective programming, establish a traffic volume model and evaluate the safety of overtaking. In order to working out the optimal offset angle, we also establish the function equation between safety coefficient, traffic flow and the offset angle during overtaking or lane-changes. Finally some safer and smarter overtaking rules are put forward by combining the offset angle and the security constraints, thus improving the safety, intelligence and traffic flow.
The Design of Weighted Mud Automatic Mixing System
Authors: Yin Wei Ming , Luo Han Jie
Published: May 2014

The density and reserve of the weighted mud play a decisive role in dealing with the unexpected oil well blowout, how to quickly mix out the weighted mud with desired density and volume is a problem which is urgent need to be resolve by each drilling crew and the petroleum equipment manufacturing enterprises. On the base of the original manual equipment for mixing weighted mud, this paper designed an automatic control system which can make the weighted mud mixed quickly and automatically.
Perpetual Topology Control in Energy Harvesting Sensor Network
Authors: Lee Chao Yang , Yang Chu Sing
Published: May 2014

Harvesting ambient energy to power Wireless Sensor Networks (WSNs) is a promising approach. However, due to low recharging rates and the dynamics of renewable energy, energy harvesting sensors are unable to provide sufficient energy for sustained operation. This work designs a novel perpetual topology control that can enhance the energy efficiency and prolong network lifetime in energy harvesting sensor network. The proposed perpetual topology control (PTC) algorithm aims to ensure WSN sustainability and make the harvesting ambient energy usefully. Experimental results demonstrate the superiority of the PDTC algorithm in energy efficient.
Fast Tracking Spherical Parallel Robot Design and Hybrid Simulation Base on Solidwork and Simmechanics
Authors: Hu Ying Jun , Yan Guang
Published: May 2014

This paper presents a new design and dynamics simulation approach of spherical parallel robot for fast tracking objects based on parallelogram mechanism. Using SimMechanics toolbox and simlink toolbox in Matlab Software, and guiding the three dimensional Solidwork model into it, the dynamics simulation and control on three DOF fast tracking spherical parallel robot is designed and studied. The experimental results show that the design mechanism obtains the anticipated requirement.
Research of Ultrasonic Used in Mobile Robot Obstacle Detection
Authors: He Hui Juan , Xu De Zhang , Wang Lei
Published: May 2014

Mobile robot is an important branch in the technological field of the robot.It refers to computer science,automation,mechanism,electronic science etal .In the mobile robot technology research,the mobile robot obstacle detection is one important research aspect of the robot.In this article,by the motor of Shanghai Ingenious Automation Co,Ltd, at first, it measured the distance of the obstacle in front of the robot by using of the ultrasonic sensor and the related software installed inside the robot, analyzed the reasons for the error; and then took the obstacles avoiding experiments by using of the three ultrasonic sensors in front of the robot,the prosess could meet the general requirement,but for the special “table obstacle” which has a hole, the robot drilled into the hole, and could not avoid. Finally, the article gives the conclusion: the ultrasonic sensor alone can not meet the precise identification of the robot on the obstacles, it is necessary to combine with other sensors to improve accuracy of obstacles.
The Design of Positioning and Environment Detection System Based on RFID
Authors: Cui Ying Hua , Bo Liu
Published: May 2014

How to ensure the safety of the miners when they are working underground is an urgently problem to be solved. In this paper, we designed a positioning and environment detection system based on RFID and sensing technology. The system can help us to locate the miners’ location and transmit the data of underground environment.
The Model of PNGV of High-Power Lithium-Ion Battery and Test Validation
Authors: Wang Bo , Zhou Wei , Shi Hui Qi , Li Bin
Published: May 2014

Based on the HPPC test data of 8Ah/144V lithium-ion battery pack, the PNGV model parameters are identified when operation temperature of battery pack is 20°C and the model of PNGV of high-power lithium ion battery pack is build. According to actual operation characteristics of high-power battery pack, the actual output voltage and model predictive voltage are compared under the high-power battery pack different operating condition based on Arbin test bench. It’s showed that the PNGV model predictive precision is not high when high-power battery pack is under steady state condition; the model predictive precision is high when high-power battery pack is under dynamic condition; the difference between model predictive voltage and actual output voltage will be bigger as the operation temperature increased.
Computer Supported Detection for Obstructive Sleep Apnea Using Electrocardiographic-Acceleration Sensors
Authors: Kim Chang Man , Baek Ji Won , Kim Yoon Nyun , Kim Hyung Jin , Kim Tea Hyung , Kim Sang Hee , Lee Jong Ha
Published: May 2014

Obstructive sleep apnea syndrome is a sleep-related breathing disorder that is caused by obstruction of the upper airway. In this research, we explore a computer-aided diagnosis system with portable ECG equipment and tri-accelerometer (x, y, and z-axes) that can automatically analyze biosignals and test for OSA. We developed an approach to record ECG signals and abdominal movements induced by breathing by affixing ECG-enabled electrodes onto a triaxial accelerometer. With the two signals simultaneously measured, the apnea data obtained would be more accurate, relative to cases where a single signal is measured. This would be helpful in diagnosing OSA.
Application of Time-Frequency Analysis & Blind Source Separation to Diagnosis of Faults with Generator Rotor System
Authors: Wang Hong Li , Xu Bing , Xue Xue Dong , Cheng Kan
Published: May 2014

One method for diagnosis of faults with generator rotor is contrived by combining local wave method and blind source separation. Time-frequency image varies with local wave of different fault signals, and this feature is applied to identify different faults. In order to realize automatic classification of faults, blind source separation is employed for separation of independent components in time-frequency image of local wave of different fault signals, so as to derive projection coefficients for a set of source images. On the basis of this, automatic classification of faults is realized with probability nerve network. Taking fault signal of rotor as an example, this method is investigated, and the validity is proved by experimental results.
Feasibility Analysis of Reverse Sealed Testing String in HPHT Wells
Authors: Gao Bao Kui , Wang Wei , Qin Xing
Published: May 2014

To solve problems met in an offshore High-Pressure High-Temperature (HPHT) well testing, a new technology is put forward—placing seal bore extension above permanent packer, and the upper landing tools being connected with seal bore extension through shear pins. This method gives a reverse position of seal bore extension compared with conventional way in which seal bore extension is below permanent packer. So, the feasibility must be considered. Two technological procedures, testing before cutting pins and testing after cutting pins, are discussed, and the highlight is on axial force and deformation of testing string at crucial moments. Results indicate that this new technology is feasible. Of the two technological procedures, axial force is the key factor when testing before cutting pins and axial deformation is the key factor when testing after cutting pins. Conclusions have been used in an offshore HPHT well testing design.
Biosorption of Ni (II) from Aqueous Solution by Aspergillus niger
Authors: Zhang Li Fang , Shao Zhao , Jiang Chun Yang
Published: May 2014

In this study, Biosorption of Ni (II) ions from aqueous solution by using biomass ofAspergillusnigerwas investigated. Different parameters such as initial pH, Ni (II) ions concentration, contact time and temperature were explored. The biosorption of Ni (II) ions was highly pH dependent and the optimum pH for biosorption of Ni (II) ions was found to be 7.0. The biosorption equilibrium was established in about 30min of contact time. Ni (II) ions removal increased with increasing temperature in the studied range. Equilibrium uptake of Ni (II) ions onto biomass increased with increasing initial Ni (II) ions concentration (20-300mg/L). The Langmuir and Freundlich isotherm models were applied to experimental equilibrium data and the Langmuir model better described the equilibrium metal uptake than the Freundlich model. These results suggest that the biomass ofAspergillusnigeris a promising biosorbent for removal of nickel (II) ions from the wastewater.
Research of Cycle Slip Detection Based on the Carrier Phase RAIM
Authors: Li Xiao Yu , Dong Xu Rong , Jia Rui Xi , Wang Jun
Published: May 2014

Integrity is the capability of sending the alarm to users timely when the navigation system cannot be used, which is a significant parameter of reliability to the system. First, the paper analyses integrity concept and future evolutions in PPP application. And then, in this paper, the effectiveness of carrier phase Receiver Autonomous Integrity Monitoring (RAIM) for cycle slip detection is explored, and evaluates the aviliablity of detection.
An Efficient Method for Accuracy Motion Estimation
Authors: Zhu Hong Li
Published: May 2014

This article proposes a new algorithm applicable to H.264 based on motion vector coding length and high-pixel accuracy filter operator instead of linear interpolation. After half-pixel accuracy motion estimation, a high accuracy motion estimation can be calculated with the intermediate results. This algorithm can achieve high accuracy estimation and compensation while decreasing algorithm complexity. The computer simulation results show that when the new proposed algorithm for 1/8-pixel accuracy is used in QCIF, CIF, CCIR format pictures, total computing time reduces more than 20% and computing time used for fractional-pixel motion estimation reduces more than 50% while coding length only increases less than 10% and PSNR-Y is approximately equal.
The Simulation and Analysis of the Large-Scale Intrusion Detection Model in Shuffle Networks
Authors: Li Ke Wei
Published: May 2014

There are some issues for the shuffle network intrusion detection, such as high loss detection rates and time-consuming procedures. This paper proposes a shuffle network intrusion detection method fusing the misuse behavior analysis and analyzes the network misuse behavior procedures. According to the damaged data flow balance features by network misuse behavior, the paper applies the hypothesis test in probability theory to evaluate whether the confidence interval excesses 0. If the confidence interval does not contain zero, it indicates the presence of feed-forward network intrusion; otherwise, there is no feed-forward network intrusion. The experimental results show that this method can effectively solve the multi-packet collaborative intrusion problems. Compared to traditional methods, the test speed and accuracy of the method is significantly improved.
The Design Process of Defect Detection Method for Large Industrial Automatic Control Software
Authors: Wang Zhen Chao
Published: May 2014

The current difference trend of automatic control software structure is more obvious, software integration makes linking correlation of overall structure appeared to play down. No significant linking characteristics exist between structural ports. The traditional detection methods of software defect are utilized to locate software defect under the differentiation structural framework, due to the lack of clear articulation feature to indicate the location region, resulting in unidentified area which software defect signal belong to and position deviation. In this paper, software defect detection method was proposed on the basis of difference structure fusion algorithm. The signal fusion technology was applied to mix the signal of software defect detection effectively, and chaos particle swarm algorithm optimization was employed to support vector machine parameters, establish the optimal models of software defect prediction, thus completing the software defect detection. Experimental results show that the algorithm for software defect detection, can greatly improve the accuracy of detection.
Design and Production of an InSAR Reflector and Applied Research in the Landslide Deformation Monitoring
Authors: Tu Yi Teng , Tu Peng Fei , Chen Yong Jun
Published: May 2014

Over the past decade, the studies have been growing rapidly on application of Synthetic Aperture Radar Interferometry (InSAR) technology to landslide deformation monitoring. On the basis of InSAR ground reflector, the paper has improved the design, produced a new InSAR reflector and successfully applied to Three Gorges Reservoir Shuping Landslide deformation monitoring.
Motion Recognition Based on Spatial Temporal HMM and Improved KPCA
Authors: Wang Zhen Yi , Chen Rui , Dong Ao Shuang
Published: May 2014

In order to solve the problem that traditional intelligent surveillance is easily influenced by blocking and the capture views is limited, this paper presents a new method with 3 Kinects. Kinects are used to capture the human skeleton data and extract motion features. Principle component of raw data is extracted by using improved KPCA. Classifier is generated by using spatial-temporal Hidden Markov Model. A set of specific motions is analyzed in monitoring area. Experimental results show that this method can efficiently solve the problems that blocking and skeleton data is incomplete. It can also improve the recognition accuracy. The improved KPCA can improve the cumulative contribution rate and reduce the motion recognition time.
A Smart Method for Detection and Research on Heart Sound
Authors: Wei Zhe , Xin Mai , Yu Qi Da
Published: May 2014

Objective: Based on the problem of aging population, increasing heart disease prevalence and the difficulty of seeing a doctor in hospital, the paper studies on the long-term continuous changes of heart sounds to implement real-time monitoring and remote diagnosis at home. Method: by use of wireless sensor technology, signal processing technology and network transmission technology, the paper designs a remote heart sound detection and analysis system based on internet of things. Results: this method can detect the heart sound, transmit the data and diagnose remotely on real-time. Conclusion: according to the patient information and heart rhythm index storage of hospital database, doctors can make the medical scheme in time to prevent and treat, which has a wide commercialization prospect.