bluuebunny/crossref_metadata_2025 huggingface dataset:
An Unsupervised Sentiment Information Identification Approach
Authors: Xu Pan Pan , Jin Hui Lan , Shi Han Xiao , Chen Wei
Published: December 2012

Existing research focuses on document-based sentiment analysis and documents are represented by the bag-of-words model. However, due to the loss of contextual information, this representation fails to capture the associative information between an opinion and its corresponding target. Additionally, several researchers focus on sentence-based approaches, which can effectively extract an aspect-sentiment word pair within one sentence. Nevertheless, their approaches can only deal with one aspect within one sentence and miss the identification of sentiment modifier. In order to solve these problems, this paper proposes a novel identification approach of aspect-modifier-sentiment word triple using shallow semantic information. Experimental results show that our approach is feasible and effective.
An Optimized BP Neural Network Based on DS Evidential Reasoning on Heart Disease Prediction
Authors: Xie Nan Nan , Chen Fei Yan , Zhao Kuo , Hu Liang
Published: December 2012

BP neural network is a widely used neural network, with advantages as adaptability, fault tolerance and self-organization. However, BP neural network is difficult to determine the network structure, and easy to fall into local minimum points. In this paper, an optimized BP neural network was proposed based on DS, he advantages of DS Evidential Reasoning on uncertain information are used to improve the recognition rate and credibility of BP. Experiments on Heart Disease Data set shows the proposed method have good performance on run time, prediction accuracy and robustness.
A Distributed Video Coding Algorithm Based on Weighted Motion Estimation
Authors: Yuan Chun , Wang Xin
Published: December 2012

The RD performance of distributed video coding (DVC) is lower than conventional video coding. This article analyzes the reason of that, finds during the decoding process DVC does not make full use of the set of side information in the distributed framework. Then paper proposes a way to improve the prediction accuracy, during the process of generating predictive side information, makes full use of the distributed structural characteristics, improves the RD performance of DVC by using bidirectional motion estimation and the weighted average methods
The Application of Wavelet Neural Networks on Rainfall Forecast
Authors: Xiao Wei Wei , Luan Wei Jun
Published: December 2012

We proposed the improved wavelet neural network and applied it to forecast rainfall. Activation function was selected automatically from three wavelet basis functions. The three given wavelet basis functions were Morlet, Mexican-Hat and Different Of Gauss(DOG) wavelet basis functions respectively. We demonstrat its effectiveness by forecasts rainfall of some cities in China. The results show that the improved wavelet networks method is better than BP neural network method in rainfall forecast.
Semantics Integral Operator Fuzzy Logic
Authors: Chai Xiao Long , Hu Gui Wu , Chen Ai Xiang
Published: December 2012

A new Operator Fuzzy logic in the theory of semantics integral has been defined. In the way of combining syntax and semantics of the formulas, this logic which named SIOFL can give an index to the truth degree of a proposition formula. It can give the quantum measure of default information with the obtained knowledge. With the character of non-monotonic, the logic system is suitable for approximate reasoning when some information is lacked.
Study on Evaluation of Skills Training Effectiveness in Electric Power Corporation
Authors: Zhang Wen Yu , Chen Yan
Published: December 2012

Training is an important means to accumulate human resources and strengthen the core competitiveness of an enterprise. As the last step in training, the evaluation of training effectiveness has been the weak point in large number of enterprises for a long time. The evaluation method of skills training effectiveness based on cloud models is provided. This method blends together the subjective and objective information. At the same time, the method integrates the fuzzy and random completely, achieves the mutual conversion of qualitative and quantitative evaluation, and deals with the uncertainty of the system evaluation indexes effectively.
The Influence of Cultural Factors on the Adoption of E-Learning: A Reference to a Public University in Sri Lanka
Authors: Thowfeek Mohamed Hussain , Jaafar Azizah
Published: December 2012

The study investigated the factors influencing e-learning adoption behavior of instructors of a public university in Sri Lanka. The analysis of various models used to study the adoption behavior reveals that cultural factors were neglected. Therefore an e-learning adoption model was proposed considering cultural factors and the model was tested among instructors. The findings of this research have significant effects on the suitability of adopting an e-learning system at this university. However it is recommended that this study should be extended to include instructors belonging to multi-ethnic groups in all universities in Sri Lanka.
The Research and Design of Distance Education System Based on CSCW Technology
Authors: Hu Hai Jian , Zeng Miao Miao
Published: December 2012

The application of CSCW (Computer Supported Cooperative Work) technology in distance education (DE) is a new direction and trend. This paper introduced CSCW technology , and then explored the function and connection of CSCW in the distance education. Finally it concluded the design principles of the distance education system based on CSCW technology, constructed a system model which is centered on cooperation, and also introduced its function briefly.
Connotation Construction of Training Process Promoting Excellent Engineers Training Quality
Authors: Zhang Qian , Yuan Jian Ning , Gao Cheng Chong
Published: December 2012

It is an important try of the Chinese higher education reform that the Ministry of Education put the Excellent Engineer Education Training Plan (EEETP) into practice in order to improve the comprehensive ability level of Chinese higher university graduates, which can integrate the graduates into actual industrial production process as soon as possible in some colleges and universities. In the implementation of the excellent engineers training, Nanjing Institute of Technology (NJIT) concentrates their effort on the modularized teaching and the project-faced teaching, and on the construction of the productive training process, establishes the evaluation system of teaching process, and emphasizes the training quality assessment of the academic and practical courses so that quasi-excellent engineer students enable them to improve their training quality, and obtain a better learning effect.
Exploration and Innovation of Excellent Engineers Training Program — Take Harbor Waterway and Coastal Engineering Major as an Example
Authors: Chen Da , Liao Ying Di
Published: December 2012

“Excellent Engineers Training Program” which was proposed by Chinese Ministry of Education is an important plan to train excellent engineers. The major of Harbor Waterway and Coastal Engineering is strongly needed by social and economic development in the recent years. It is both a challenge and an opportunity to carry out the Excellent Engineering Program. This paper firstly made an analysis of problems in the engineering and technical personnel training in China. And it also highlighted the factors when exploring and innovating the training work of Excellent Harbor Waterway and Coastal Engineering Engineers. Moreover, the exploratory work of the major of Harbor, Coastal and Offshore Engineering in Hohai University for “Excellent Engineers Training Program” has been introduced.
Research of the Optimal Production Planning Based on Multi-Group
Authors: Wei Shu Di , Zhao Hui Huang
Published: December 2012

In the case of limited resources, we do not only need to think how to develop a production plan to best meet the needs of different groups, but we also gain maximum profits. That means how to make the decision for the actual production. According to the cost of production planning, the resource producer can gain maximum profit. Based on a thorough research in this issue, we state a formal definition of the multi-group multi-program multi-attribute problems, propose the optimal population program decisions with Topsis, and use a linear programming method to develop the optimal production program .The experiment results validate that the method is feasible.
PM Group Gained the Central Heating Negotiation Success by the Way of the Bilateral Compound Factors Forecasting Model
Authors: Pan Ma Lin
Published: December 2012

The characteristics, law and trend of commercial negotiation are expounded in this text. The commercial negotiation is the bridge of the commodity production and consumption. It is also the guaranty of the distributing and exchanges. The commercial negotiation compound factor forecasting model application study has been expounded under the Chinese new market economy conditions. By way of the application of the compound factors forecasting model, the market operating principle of "The government is leading and the market is operating" was got finally. The society hot resource is fully used. The environment is improved. And the society effect of resident welfare index etc. had been raised. It is final by way of using commercial negotiation compound factor forecasting model to have gained the multilateral double win result.
The Application of Fuzzy Comprehensive Evaluation Method in the Evaluation of Thesis Quality
Authors: Wang Hua , Chen Ning Ning , Chen Jing
Published: December 2012

For the drawbacks of the thesis quality assessment method which now currently used, Fuzzy evaluation model is constructed based on fuzzy comprehensive evaluation method, to evaluate the thesis. For the model we give a test experiment with the actual data. The results show that the evaluation results are more scientific and reasonable, for using the model of fuzzy evaluation.
Teacher Human Resources Development Based on Virtual Learning Community
Authors: Wei Dan Dan , Hu Xiao Qiang , He Ling
Published: December 2012

This paper explores atmosphere construction, learning environment supporting, and specific embody of teacher human resources development based on virtual learning communities, in order to promote teacher profession continuous development from the view of human resources development.
An Improved Video Mosaic Block Detection Method on the Statistics of Pixel Difference across the Boundary of Macroblock and Suspected Mosaic Blocks
Authors: Zhou Tong
Published: December 2012

This passage proposes a new method to detect mosaic not only using the Y (luminance) component in YUV color space of videos, but also using the U (chrominance) and V component. The mosaic effect is measured by the boundary pixel difference from the neighbor macroblock. Instead of detecting the existence and position of mosaic blocks as traditional methods do, this method focuses on the statistics of the number of suspected mosaic blocks so that the quality of the whole frame affected by mosaic can be assessed. Experimental results show that the new method has good performance on fallout ratio, omission factor and computational complexity.
Design of Broadband GaN HEMT Power Amplifier with Ku Band
Authors: Cheng Zhi Qun , Jin Li Wei , Shi Wen
Published: December 2012

A broadband power amplifier module based on GaN HEMT operating Ku band is designed. TGF2023-02 Chip of GaN HEMT from TriQuint is modeled first. And then the module consists of two stages amplifiers. The first stage amplifier is single-stage amplifier and the second is two-way combiner amplifier. Wilkinson power divider, DC bias circuits and microstrip matching circuits are simulated and designed carefully. Simulation results showed that the amplifier module exhibits a power gain of 7 dB, power added efficiency of 13.9%, and an output power of 16 W under Vds=28 V, Vgs=-3.6 V, CW operating conditions at the frequency of 15 GHz.
Study on Liquid Volume Measurement Based on Wireless Transmission and Hydraulic Sensors
Authors: Luo Jie , Wang Yun Hui , Zhao Qian Wen , Guo Hui , She Fei
Published: December 2012

Based on hydraulic sensors and wireless transmission, a new wireless measurement method of liquid volume in a tank is introduced. This measurement system includes hydraulic pressure sensors, A/D converter, GPRS (General Packet Radio Service) module and upper monitor in a computer, from which the users can get aware of the liquid volume in a tank at any time. The measurement system has been built，calibrated and tested. The experimental results show that this measurement system works well and the measurement error is less than 1%.
Fusing Remote Sensing Images Using a Statistical Model
Authors: Luo Xiao Qing , Wu Xiao Jun
Published: December 2012

Enhance spectral fusion quality is the one of most significant targets in the field of remote sensing image fusion. In this paper, a statistical model based fusion method is proposed, which is the improved method for fusing remote sensing images on the basis of the framework of Principal Component Analysis(PCA) and wavelet decomposition-based image fusion. PCA is applied to the source images. In order to retain the entropy information of data, we select the principal component axes based on entropy contribution(ECA). The first entropy component and panchromatic image(PAN) are performed a multiresolution decompositon using wavelet transform. The low frequency subband fused by weighted aggregation approach and high frequency subband fused by statistical model. High resolution multispectral image is then obtained by an inverse wavelet and ECA transform. The experimental results demonstrate that the proposed method can retain the spectral information and spatial information in the fusion of PAN and multi-spectral image(MS).
Design of Resonant Soft-Switching Grid-Connected Inverter
Authors: Yang Fang , Liu Zhao Hui , Zhang Jian Wei
Published: December 2012

This paper discusses the topology requirements of the small power photovoltaic grid-connected inverter,and introduces several typical topologies,moreover,points out the advantages and disadvantages,efficiency and applicable occasions of the various topologies. In this paper,a single-phase full-bridge grid-connected inverter topology(DC/AC) is designed. The soft-switching technology is employed on the topology for reducing switching loss. The topology can realizes zero voltage switching when the main switch turns on and turns off and zero current switching when auxiliary switch and the power diode turns on and turns off.The converter has higher efficiency than other topologies.
Study on the Performance of Measurement Apparatus for Vacuum Material Outgassing Rates
Authors: Feng Yan , Dong Meng , Sheng Xue Min , Cheng Yong Jun , Zhao Lan , Zhang Rui Fang
Published: December 2012

A measurement apparatus for vacuum material outgassing rates was developed, which was mainly composed of four systems, including pumping system, switching between two pumping paths(SPP) measurement system, constant volume measurement system, bake heating and light irradiation heating system. The ultimate pressure, 10-9Pa, was thus obtained in the UHV chamber by combining the magnetically levitated turbo pump with mechanical pump. The test principles of constant volume method and SPP method were described, and several vacuum material outgassing rates such as copper were tested at room temperature. The lower measurement limiting value of apparatus can be extended to 10-12 Pam3s-1cm-2.
The Establishment of a Flexible PdM System for Industry Detection
Authors: Xia Yan Chun
Published: December 2012

The universal predictive maintenance(PdM) system framework integrated several common and important technologies is established in the paper. It is very important to choose and design the relative technologies for the PdM system in the real application at different factories. Here the reasons and method of the system establishment are explained. The functions and structures of the system are analyzed. The establishment of the database of the system is proposed. The PdM system can be realized flexibly based on the real conditions in the real industry application.
Virtual Manipulation of Multi-Wall Carbon Nanotubes with Atomic Force Microscope
Authors: Gao Zhan , Zhang Shu You , Wang Jie Hua
Published: December 2012

This paper describes a virtual reality (VR) simulator for the manipulation of carbon multi-wall nanotubes with atomic force microscope (AFM). Major challenges in interfacing a human operator with tasks of manipulating nanotubes via a haptic VR interface are outlined. After a review of our previous efforts, we present the current state of our VR simulator for multi-wall nanotube manipulation. The collision detection, interaction force modeling, deformation simulation and haptic rendering of nanotubes are then discussed. Results of virtual manipulation of carbon nanotubes are presented within an immersive VR set-up.
Designing a Soft Sensor with the Weighted Fuzzy Neural Network
Authors: Sun Yan , Ma Ming
Published: December 2012

Soft sensors are algorithms capable of estimate the process output that can not be measured directly in real time. A data-driven soft sensor is an inferential model developed from process observations. In this paper, the soft sensor modeling process based on the weighted fuzzy neural network was discussed. The proposed algorithm based on genetic algorithm and particle swarm optimization could obtain a near-optimal structure of fuzzy neural network, and the numerical experiments show that the soft sensor model has good performance.
Detection of Structural Change in Panel Model
Authors: Wang Xiao Gang
Published: December 2012

Detection and estimation of structural change at unknown dates in panel model was investigated. The structural change can be consistently estimated and asymptotic distribution was derived. Monte Carlo simulations were presented to access the theoretical result numerically.
Study on the Performance of Chaotic Oscillator in Weak Signal Detection
Authors: Su Yan Mang , Gao Zhen Bin , Liu Xiao Zhe , Zheng Na
Published: December 2012

For the frequency detection by using chaotic oscillator, in this paper, the results which are under the influence of the sampling frequency on the basis of theory that the output variance of the system will reach a maximum when the reference frequency equals to the signal frequency are analyzed. Experiments have indicated that the accuracy rate of the results will be improved and the signal to noise ratio (SNR) threshold will be reduced by increasing the sampling frequency to a certain degree. Besides, we have a further research on detecting the frequency of a signal with an initial phase based on the theory mentioned above, simulation experimental results have verified the output variance still has a drastic change when the reference frequency is equal to the signal frequency.
A Method of Color Detection Base on Xy-H
Authors: Yu Hua Yun , Liu Meng Yun
Published: December 2012

In order to improve the accuracy and speed of the color detection, to comparative analysis on skin color detection in the clustering of nine color space and regularity of distribution area, and some meaningful conclusions are discovered that the XYZ color space is suitable to do skin color two-dimensional threshold segmentation while the HSV、HIS、HSL is suitable to do one-dimensional threshold segmentation on tonal H component. A new color space xy-H is constructed for color detection using those conclusions which were discovered. The results show that it has significantly improved for color diction.
A Hierarchical Coordinated Control Method for Low Voltage Micro-Grid in Intelligent Community
Authors: Su Yi Rong , Wang Shuang Hu , Wang Bing Wen , Bao Hai Long
Published: December 2012

The operation control of the micro-grid system is the foundation to protect micro-grid equipment, to realize associate control and optimize economic operation. Looking on Chenjiazhen micro-grid in Shanghai as model, the paper set three hierarchical controls: protection control, micro-grid coordinated controller control which can achieve millisecond time precision and intelligent community energy management system control. Different level control function has been divided. Control functions in all levels complement each other and collaborate together to achieve the coordination and control of micro-grid running.
Developing an Optimal Pricing Sensor Model with Distribution Network Intervened
Authors: Chiang Ming Han
Published: December 2012

This study build AHP model to optimize pricing structure factors for the managerial benefit of the suppliers. For the suppliers that it tend to be more reactive than fixed price or simple average price in investing of market share approach. With a straightforward and natural reformulation of weighted pricing structure in terms of perspectives, the AHP evaluation shows that weighted method, especially distribution and price weighted method, can maintain more profit than simple method or single price calculation. This result help the suppliers pay more attention to price control.
Fault Estimation for Linear Systems with Multi Time-Delay
Authors: Li Zhi Dan , Dong Quan Chao , Xiao Jian , Hua Chang Chun
Published: December 2012

This paper deals with the problem of observer-based fault estimation for a class of linear systems with multi time-delay. The key of this paper is the introduction of a generalized coordinate transform, such that in the new coordinates, all the time-delay terms are injected by the system’s input and output. Based on the new obtained system expression, the design of fault estimator is formulated in the framework of H∞ filtering by incorporating the prior knowledge of fault into the design procedure, and the dynamics of the estimation error is converted into a general linear time invariant form with generalized unknown input time-delay terms. Based on the bounded real lemma, the observer gain matrix is obtained in terms of linear matrix inequality. A numerical example is given to illustrate the effectiveness of the proposed approach.
Magnetorquer Based Vertical Damping Method for Microsatellite Attitude Control
Authors: Hou Xu Guang , Yan Jian , Jin Jin , Mei Shun Liang
Published: December 2012

Aiming at a three-axis stabilized microsatellite, a novel attitude control method, called magnetorquer based vertical damping, is proposed to avoid the occurrence of the worst situation that the non-solar-battery-plane spins towards the sun. DSP based simulation results based on DSP show that the vertical damping method outperforms the simple damping method when no orbit information is available, simultaneously the whole attitude control scheme is simple and effective. The proposed solution guarantees a stable power supply from the electrical source even under the extreme situation, which improves the reliability of the whole microsatellite system.
Simulation and Comparison on Photoelectric Conversion Efficiency for Auto Tracking Solar System and Fixed Solar System
Authors: Xu Yan , Zhu Xiao Feng , Zhang Guo Sheng , Li Yang
Published: December 2012

Assuming the clearness and cloudless weather in Beijing area, the received solar radiation power is simulated according to three different auto-tracking solar systems and fixed solar system by Matlab. The tracking intervals of three different auto-tracking solar systems are separately 60mins, 30mins and 10mins. The daily mean solar radiation, the monthly mean solar radiation and the yearly mean solar radiation are simulated for three auto-tracking solar systems and fixed solar system. The simulation results can be used as the auto-tracking solar system design reference for engineers, and helpful for solar system optimizing.
The Design and Research of Steering Linkage Automatic Process Based on PLC
Authors: Zhu Xu Lai
Published: December 2012

Aiming at the status of steering linkage with more work station requirements but low working, a set of steering linkage processing autoproductline system based on PLC is developed. The system has the advantages of high reliability, strong anti-interference ability, easy to use and simple program. It achieves all the automatic production of charging, radial facing, chamfering, reaming, tapping, grooving and blanking, decreases the work intensity of worker and improves production efficiency and qualified rate of product greatly.
A Design of Charger with Intelligent Charging and Capacity Detection
Authors: Wang Wen Juan , Zheng Guang Xi , Lu Wei Dong
Published: December 2012

This is a design of intelligent charger with battery capacity detection based on STC12C5AS2 single chip microcomputer. By connecting PC, users could set cut-off charge-discharge voltage and current directly to get monitor the no-man. It realized to judge limiting voltage and current automatically and has intelligent floating and trickle charge. The users could see voltage curve, current curve, percent of charge, capacity both charge and discharge respects. Here, we introduced partly, including simply circuit design and offered our photo both circuit and real device. We focus to detail program design of PC end in the paper. We used double buffer technique to solve flicker phenomenon. Meanwhile, when we designed and performed repeatedly, we found another good ways to save CPU and reduce volume of calculation. That is that we created another two container to save calculated data so to plot more fast when grid is in unchanged.
The Research of Unbalanced Three-Phase Adjustment in Distribution Network
Authors: Zheng Yan Wei , Bai Zhong Hai , Feng Zhi Quan
Published: December 2012

To balance three-phase loads in distribution network with abundant of single-phase loads, the idea of three-phase adjustment and wiring method is proposed in this paper. Three-phase adjustment controller is designed, and the least load adjustment strategy is proposed, which can adjust the three-phase load to roughly balance automatically. The system can solve the serious three-phase unbalance problem of the lines with single-phase load, which may instead of capacitive compensation in low voltage distribution network. It can improve power quality and reduce network losses.
Vehicle Attitude Control Simulation Based on Soft and Hard Damping
Authors: Men Yu Zhuo , Yu Haibo , Pan Xin
Published: December 2012

In order to study the impact of vehicle attitude changes on stability, vehicle attitude control simulation model based on soft and hard damping characteristics was built. The model was applied to simulate vehicle straight driving and turning driving, thus simulating various vehicle attitudes in driving. The simulation results show that this model was correct and the control algorithm was feasible; the damping impact on a variety of vehicle attitudes in the driving process can be simulated in advance by adjusting the damping; and the changes of soft and hard damping adjustable shock absorber damping can effectively change the vehicle riding comfort and handling stability.
A Numerical Simulation of Hot Rolling Process of H-Beams
Authors: Liu Wen Ping , Wang Pei Qi
Published: December 2012

To estimate the effect of roller deformation on the workpiece during the rolling process of H-beams, it is essential to consider the force exerted on the rollers and the deformation thereof. For this purpose, a three-dimension thermo-mechanical coupling model has been built with the finite element analytical package ABAQUS to simulate the hot rolling process of H-beams. In particular, the simulation is conducted under the assumption that the rollers are elastic and rolling torque imposed unilaterally, which agrees with the practical rolling conditions. Noting the results of FEM simulation, the metal flow and temperature distribution have been obtained. To verify the effectiveness of the proposed simulation, comparisons of the roller contact reaction and temperature between the simulated and measured values have been made. The simulation is meaningful for preparing continuous rolling procedures of H-beams.
An Asynchronous Motor Soft-Starter with Discrete Variable Frequency Technology
Authors: Yan Yao , Wang Hong Hua
Published: December 2012

This paper analysis the control principle of the asynchronous motor soft-start with discrete variable frequency technology．A simulation model for the asynchronous motor soft-starter using discrete variable frequency technology is built based on MATLAB SIMULINK/POWER SYSTEM．In start process, positive sequence sub - frequency such as 13、10、7、4 discrete variable frequency is used in the soft-starter to simplified power circuit and its control. While on the power frequency time slice ,a single neuron PID algorithm is used to limit the current. The simulation results verify the asynchronous motor soft-starter with discrete variable frequency technology not only reduces the initial firing current but also has bigger start torque, which has a faster start speed compared with the normal soft starter with current limit starting control technology.
Hamiltonian Robust Controller Design of Permanent Magnet Wind Generators
Authors: Wang Bing , Qian Yan Ping , Zhang Yi Ming
Published: December 2012

In this paper, the dual-input nonlinear controller of permanent magnet wind generators was designed based on energy dissipation theory and Hamiltonian energy approach. Under the action of the Hamiltonian controller, the closed-loop system is asymptotically stable on case of no disturbances and finite-gain L2 stable in the presence of disturbances. The Hamiltonian energy approach provides us a physical insight and a new way to the controller design of nonlinear systems. The simulation results show the effectiveness of the proposed robust controller.
Optimizing of Thermal Cycler Control in Microfluidic PCR System
Authors: Li Li , Zhu Ling , Jiang Qin , Liu Gang
Published: December 2012

Microfluidic PCR implements the PCR as a continuous process for nucleic acid analytics. Main fields of application are the monitoring of continuous processes for rapid identification of contaminants and quality control as well as high throughput screening of cells or microorganisms. The special heater arrangement allows the implementation of up to 40 cycles on the footprint of a sample. Precise temperature control is the key factor of PCR instrument, and optimal algorithm occupies an important position in this instrument. In order to optimizing the microfluidic PCR system thermal cycler perfomants, fuzzy-PID algorithm was designed, which would replace the lead correction algorithm. The simulation model was constructed and experimented with the use of the Simulink of Matlab software．The simulation results show that overshoot of lead correction algorithm is 8.5%, adjustment time is 3.4s. Overshoot of fuzzy-PID algorithm is 1.45%, adjustment time is only 1.94 s. Obviously, fuzzy-PID algorithm would overcome the defect of large overshoot of traditional PID, and the adjustment time becomes shorter also.
Reliability Analysis of a Two-Unit System with Connecting and Disconnecting Effect
Authors: Peng Pei Rang , Li Chun , Guo Wei Hua
Published: December 2012

A Two-Unit system with connecting and disconnecting effect is studied in this paper. By the method of Functional analysis strong continuous semi-group, the paper analyzes the restriction of essential spectral growth bound of the system operator. The restriction of essential spectral growth bound of the system operator and the change of the essential spectral radius after perturbation is analyzed. The essential spectral radius of the system operator is also discussed before and after perturbation. The results show that under some conditions the dynamic solution of the system is exponential stability and tends to the steady solution of the system. At last, we analyze the reliability of the system.
Research of Self-Adapted Scheduling Policies for Supercomputer Computing Resource Based on Service Differentiation
Authors: Zhang Qiang , Lin Hua Ling , Zhou Pei Yi , Song Jiang Jie
Published: December 2012

The scheduling of supercomputer resource can greatly affect the computing speed of simulation and improve the efficiency of resource. This paper raise a design of resource scheduling architecture, which has centralized- control and distributed agent design. Aiming at the importance of tasks, a self-adapted scheduling policy way of computing resource is presented, which is used for service differentiation. Then key algorithms are described. Finally, simulation results prove the effect of our policy design.
Research on Expert System of High-Speed Plane Lapping Machine with NC Based on Network Knowledge Acquisition
Authors: Yang Jian Dong , Long Duo
Published: December 2012

This paper focuses on integrated development of high-speed lapping technology, expert system and network technology. Data mining objects are high-speed lapping experiments and previous experiences, in the plane high-speed lapping processing; the network technology is embedded in NC machine, through inputting the processing requirements of the work piece surface roughness, and the network expert system reasons out the appropriate processing parameters to insure precise high speed lapping.
The Key Technology Research on Integration between Electric Vehicles and Smart Grid
Authors: Liu Zhi Hong , Zhang Jian Wei , Zhao Xiang , Yang Fang
Published: December 2012

Expounded China's electric vehicle (EV) scale trends and energy supply technology status. Research on smart AC charging pile orderly charge control strategy execution method, having a guide control function and on-board charger monitoring function of the charging pile intelligent controller, communication method and communication protocol between AC charging piles and vehicle terminal; Research on AC/ DC combined charging interface, AC/ DC combined charging equipment, communication method, communication protocol and working mode between AC/ DC combined charging device and EV; Research on non-contact power transmission scheme and principle, non-contact power transmission circuit topology and the control method; Research on the running characteristics and charging characteristics of EVs, EV charging demand model and the key influence factor and its interaction mechanism; Research on the operation coordinated control scheme between virtual charging stations and grid, research on the optimization control strategy of virtual charging station. Finally, analysis of key technologies research significance.
The Research for Electrostatic Spinning Parameters Control System at High Voltage
Authors: Gong He , She Cai Dong , Li Jian , Li Shi Jun
Published: December 2012

In electrospinning at high voltage, material temperature, the distance between needle and collecting plate and the situation on pushing on material within needle are factors affecting the spinning quality. The paper used the microcontroller as the core, adopted the stepping motor to regulate collecting plate position driving machinery, got feedback by the displacement sensor. During the spinning process, using the infrared temperature probe to measure the needle, meanwhile controlling miniature stepper motor to advance material within needle in constant speed driving piston. The experimental results show that the system has high control accuracy, temperature accuracy can achieve 0.1°C, spinning interval is 1cm and control accuracy is 0.05mm. It provides technical support for a comprehensive, in-depth a electrospinning research.
Design of a Balanced Three-Phase Power Supply Soft-Switching Based on Single-Phase Inverter Power
Authors: Cai Hui , Yan Hong , Chen Wei Min , Li Qing
Published: December 2012

To eliminate the negative effects caused by three-phase unbalanced distribution, a novel soft-switching system based on single-phase inverter is proposed. The system achieves three-phase equilibrium distribution by adjusting the power supply of the electric equipments. This paper presents a track strategy named regulating frequency to promise no impulse current, which means regulating the output frequency of the inverter to make the output voltage of the inverter synchronize with the grid voltage. Firstly, make the output voltage of the inverter synchronize with the voltage of original access phase, then switch the electric equipment to the inverter. Secondly, make the output voltage of the inverter synchronize with the voltage of alternative access phase, then switch the electric equipment to the alternative access phase to accomplish the soft-switching. MATLAB software and experiment are used to carry out verification for this system. The result shows that the impulse current is practically zero when the electric equipments are switching. The system achieves soft-switching.
Modeling and Simulation of Trajectory Correction Projectile
Authors: Sun Xin , Zhang Hai Jun
Published: December 2012

Established and simulated a two-dimensional amendment trajectory model for mortar. Theoretical researching and simulation show that using canard control to correct trajectory, we can change the size and direction control by adjusting the control signals. Not only can we correct one-dimensional trajectory, but also correct two-dimensional trajectory which concluding projectile range and lateral displacement, improving shooting accuracy.
Nonlinear Robust Adaptive Control Using Direct Adaptive Method
Authors: Chen Yi Mei , Chen Shao Ru
Published: December 2012

The problem of robust adaptive stabilization of a class of multi-input nonlinear systems with unknown parameters and structure has been considered. By employing the direct adaptive method to a general nonlinear adaptive system, a robust adaptive controller is designed to complete the global asymptotically stability of the system states. Some simulations are provided to illustrate the effectiveness of the proposed method.
Optimization Control for Solidification Process of Secondary Cooling in Continuous Casting Steel
Authors: Wang Zhao Feng , Yao Man , Zhang Xiao Bing , Wang Xu Dong
Published: December 2012

In order to predict and control the temperature of continuous casting slab, a mathematical heat transfer model simulating the solidification process of continuous casting slab has been developed based on the realistic roller-layout and spray nozzle distribution. And the accuracy has been verified by comparing with the pin-shooting experiment results. An advanced control strategies are adopted to achieve the optimization of water quantity under different production conditions by the integration of energy saving water distribution module and slab temperature optimization module in the dynamic secondary cooling model. The total water consumption has a trend of dropping off after the utilization of the optimization technique. And the slab surface temperature increases which fits for the down stream direct hot rolling.
A New Cockroach Swarm Optimization for Motion Planning of Mobile Robot
Authors: Liu Wanhui , Cheng Le
Published: December 2012

In this paper, an improved cockroach swarm optimization, called cockroach swarm optimization with expansion gird (CSO-EG), is presented and applied to motion planning of autonomous mobile robot. In CSO-EG, the expansion gird method is used to model workspace. By computing the weight factor, the Euclidean distance from each candidate to the destination cell and the pheromone strength of each candidate cell are use as the heuristic information together. For increasing the variety of path, a random choosing cell strategy is introduced. The simulation experiments demonstrate that the CSO-EG algorithm can quickly get the optimal or near-optimal path in a workspace populated with obstacles.
Transmission Optimization of Wireless Visual Sensor Networks with Compressed Sensing Encoder
Authors: You Lei , Gao Zhimin , Han Yu Tong , Su Xin
Published: December 2012

The design and optimization of wireless visual sensor network (WVSN) is challenging due to error-prone wireless link, limited resource and low computational capacity. Traditional video coding methods and layered transmission protocols are not efficient for visual information collection in WVSNs. In this paper, we adopted the compressed sensing (CS) paradigm to sense and encode the visual information, and proposed a cross-layer transmission algorithm to achieve optimal trade-off between total distortion and power consumption by simultaneously controlling the CS measurement rate and allocating the power and bandwidth for each wireless link. The algorithm was obtained by using convex dual theory and sub-gradient iterative method. The optimality condition of the proposed algorithm was also given. The algorithm can be implemented in a practical WVSN in a distributed way with only limited local information exchanges.
Networking Based on ZigBee Technology for Wireless Physiological Signals Aquisition
Authors: Liu Xiu Ling , Qiao Lei , Zhu Xiaoyu , Sun Haijun , Wang Hong Rui
Published: December 2012

This paper introduces a monitoring system for health surveillance with the modern wireless communication.On the basis of predecessors' work, a remote heath monitoring system is designed based on Zigbee and human-computer interacting technology, which uses real-time monitoring in the field of disease prevention and rehabilitation. Every node is introduced and the results show that this system overcomes short distance and inconvenience of the state-of-the-art systems.
A New 10T SRAM Cell with Improved Read/Write Margin and No Half Select Disturb for Bit-Interleaving Architecture
Authors: Zhou Hong Gang , Song Qiang , Peng Chun Yu , Tan Shou Biao
Published: December 2012

A new 10T SRAM cell is proposed in this paper for simultaneously addressing the half select problem and improving the read/write stability. Without the half select condition, the proposed 10T cell allows efficient bit-interleaving to provide soft error rate protection and the dynamic power is also decreased significantly due to the reduction in the number of bitlines discharged and charged during the read and write operation. In the new 10T SRAM cell, one side of the cross-coupled inverters cuts off the pull up path or pull down path through adding two gated transistors according to the write ‘0’ or ‘1’ operation. It brings a great improvement for write stability without considering the half select disturb during the write operation. The simulation results indicate that the RSNM and WM of the proposed SRAM cell are enhanced by 130% and 58%, respectively, as compared to the conventional 6T SRAM cell in SMIC 65nm CMOS technology.
Attack Wireless Sensor Network Using Compromised Key Redistribution
Authors: Yein Alan Dahgwo , Chen Cheng Yeh , Hsu Te Cheng , Hsieh Wen Shyong , Lin Jiun An
Published: December 2012

Wireless sensor networks have been widely used in many areas, such as earthquake monitoring, building structure monitoring, and military surveillance. In this work, we focus on the wireless sensor network deployed in the battlefield, using random key predistribution scheme. Based on the node cloning attack, we proposed a new attack scheme, called compromised key redistribution attack, and discussed related attack scenarios. Furthermore, we have exposed that, when the overlapping factor of compromised key set is larger than 0.05, it is almost 90% that the number of distinct compromised keys is 10.5% of the original key pool. This result helps the adversary estimate the approximated size of original key pool by calculating the overlapping factor, thus calculate the probability that malicious nodes successfully establish malicious connections with legitimate nodes.
Construction of WSN and Application of Localization for In-Home Healthcare of the Elderly
Authors: Cheng Wen Bo
Published: December 2012

The problem of population aging is very severe in China; in-home healthcare of the elderly has become an urgent important topic. Wireless sensor networks in many areas have been applied widely, the purpose of this work is to construct wireless healthcare network by using the ZigBee communication technology, and to achieve the real-time localization for healthcare of the elderly. The indoor data acquisition and simulation analysis show that this wireless sensor network has the characteristics of easy to construct and high precision localization. This study to promote the elderly healthcare has positive effect.
Calibration Based on a Simplified D-ToA Localization Method for the Video Sensor Nodes on the Metro Vehicle
Authors: Yao Xiao Yang , Li Si Yuan , Tang Jun , Yang Wei Feng , Chen Jian Xiao
Published: December 2012

The onboard video surveillance/CCTV system and the concept of calibration have been analyzed. The simplified Differential Time of Arrival localization method (D-ToA) has been proposed and applies to the calibration of the video sensor nodes. The experiment results show that the D-ToA has a good accuracy and satisfies the requirements of the calibration of the video sensor nodes.
A Novel Low-Voltage CMOS Mixer with Differential Floating-Gate Input
Authors: Cao Xin Liang , Fan Yan Hu , Li Jian Xin
Published: December 2012

In order to adapt to low-voltage operating of the Gilbert CMOS integrated mixer, a novel mixer is researched which with floating gate amplify transistor and a few stack from the power supply to the ground. The mixer had some advantages that are avoided the input DC voltage imbalance and suppressed 1/ f noise. The mixing feasibility is confirmed by time domain simulation, and the mixing output signal quality is analyzed by spectrum simulation. The results show that the mixer output main spectrum is the difference for various frequency input signal. The main-spectrum is more than 6dB with three order inter-modulation interference amplitude.
Reconstruction of Noisy Electromagnetic Fields by Means of Compressive Sensing Theory
Authors: Bellan Diego
Published: December 2012

This paper deals with the emerging compressive sensing theory applied to reconstruction of the spatial distribution of a magnetic/electric field corrupted by additive noise. A typical application could be monitoring of the electromagnetic environment of a wide area where an electromagnetic source or susceptible electric/electronic apparatus are located. To this end, wireless field sensors can be assumed to be deployed over the monitored area and used to provide spatial samples of the field. The main advantages offered by compressive sensing include a number of sensors much smaller than the number foreseen by the traditional Shannon sampling theory, and the possibility to resort to nonuniform distribution of the sensors. A specific numerical analysis is devoted to investigate the effects of additive noise introduced by wireless technology, including quantization noise featuring low-cost sensors, environment and electronic noise.
Implementation of Costas Loop for BPSK Receivers Using FPGA
Authors: Guo Si Yu , Qiao Dong Hai , Zhao He Ming
Published: December 2012

This paper introduced a scheme of BPSK (Binary Phase Shift Keying) carrier synchronization based on all digital Costas loop. The principle and implementation of every module used in Costas loop were demonstrated in detail and some of them were optimized to shorten the carrier recovering time. The functional simulation with the ModelSim shows the digital Costas loop works well and its carrier synchronization could be reached in only several cycles. The proposed Costas loop are implemented in FPGA chip and verified by Altera built-in SignalTap logic analyzer. For the implementation with Altera Cyclone IV EP4CE115F29C7N chip, the entire digital Costas loop only occupies a very small part of FPGA resources.