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Reputation evaluation method for open multi-agent systems

Journal of Beijing Institute of Technology 2013年第1期22卷 75-80页

作者：金福生董明斌牛振东张全新 School of Software Beijing Institute of Technology School of Computer Science and Technology Beijing Institute of Technology

A reputation evaluation method based on multi-dimensional information representation and correlative algorithm is proposed for open multi-agent systems. First, a vector model is estab- lished to represent the reputation related information. Second, a vector based reputation model ＂TRUST＂ is put forward to evaluate the reputation of agents. Finally, a correlative algorithm for se- lecting the most appropriate service provider is proposed. Simulation results indicate that the method can quickly and accurately to achieve the aim of adaptive immunity to reputation fraud and improving the average gain that service consumer agents obtained.

关键词： reputation reputation fraud vector correlation algorithm

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An algorithm to quantify correlated collective cell migration behavior

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BIOTECHNIQUES 2013年第2期54卷 87-+页

作者： Slater, Benjamin Londono, Camila McGuigan, Alison P. Univ Toronto Dept Chem Engn & Appl Chem Toronto ON M5T 3J9 Canada Univ Toronto Inst Biomat & Biomed Engn Toronto ON M5T 3J9 Canada

Collective cell migration is an important process that determines cell reorganization in a number of biological events such as development and regeneration. Random cell reorganization within a confluent monolayer is a popular in vitro model system for understanding the mechanisms that underlie coordination between neighboring cells during collective motion. Here we describe a simple automated C++ algorithm to quantify the width of streams of correlated cells moving within monolayers. Our method is efficient and allows analysis of thousands of cells in under a minute;analysis of large data sets is therefore possible without limitations due to computational time, a common analysis bottleneck. Furthermore, our method allows characterization of the variability in correlated stream widths among a cell monolayer. We quantify stream width in the human retinal epithelial cell line ARPE-19 and the fibroblast cell line BJ, and find that for both cell types, stream widths within the monolayer vary in size significantly with a peak width of 40 mu m, corresponding to a width of approximately two cells. Our algorithm provides a novel analytical tool to quantify and analyze correlated cell movement in confluent sheets at a population level and to assess factors that impact coordinated collective cell migration.

关键词： collective cell migration correlation algorithm cellular monolayer wound healing

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Transmission Design of the Ultrasonic Flow Measurement Based on the correlation Method

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2nd International Conference on Frontiers of Manufacturing Science and Measuring Technology (ICFMM 2012)

作者： Xu, Hui Yan, Zengtian Wang, Yang Gao, Songwei Shenyang Univ Technol Sch Informat Sci & Engn Shenyang 110870 Peoples R China

ISBN: (纸本)9783037854044

In design of ultrasonic flow measurement, the reproducibility of constant amplitude periodic signal will lead to a not unique time difference based on the correlation method. The aim of this paper is to design a set of amplitude modulation transmitting signal to solve the multiple values calculation of the time difference. The frequency characteristics of ultrasonic probe and the amplitude frequency characteristic of different duty cycle square wave are researched and tested. We cleverly combine the logic device FPGA with the property of the ultrasonic probe to achieve the amplitude modulation waveform in the circuit design. The experimental results show that FET switch controlled by the logic device FPGA can transmit amplitude modulation signal. The measured error of time difference after correlation is not more than 1.62 mu s..

关键词： Ultrasonic flow measurement correlation algorithm Drive Pulse Duty Ratio Amplitude modulation Transmitting circuit Probe analysis Frequency characteristic

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The Researching on Evaluation Analysis Model about Student's Study Quality Based on Web

The Researching on Evaluation Analysis Model about Student's...

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2nd International Conference on Advanced Design and Manufacturing Engineering (ADME 2012)

作者： Wang, Yuanqiang Hao, Shangfu Wang, Zhihui Sun, Baili Hebei North Univ Sch Informat Sci & Engn Zhangjiakou 075000 Hebei Peoples R China

ISBN: (纸本)9783037855034

With the development and formation of networked and digital campus, the characteristic of diversification and complicated have been founded in student's learning behavior. At the same time, for more broad application of web technology, promoted the ascension of teaching effect and reformation on education teaching method. In this paper a new evaluation analysis model about student's study quality based on web was proposed, and in this model, and in this model the correlation analysis algorithm has been used to verified the danamic relationship between analysis model and student performance, with the description of core technology in this model the validity and practicability of teaching quality monitoring process in the level student was proved.

关键词： web environment learning behavior learning quality analysis model correlation algorithm

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Flow Measurement With Digital Correlator Realized By FPGA

Flow Measurement With Digital Correlator Realized By FPGA

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International Conference on Material Science and Engineering Technology (ICMSET 2011)

作者： Wang, Yanlong Zhang, Junhua Bu, Lulu Yang, Jun Shi, Xinling Yunnan Univ Dept Elect Engn Sch Informat Sci & Engn Kunming Peoples R China

ISBN: (纸本)9783037853610

Cross correlator is the core device of the cross-correlation flow measurement system. This paper describes the theory of the cross-correlation flow measurement system and realizes the digital correlator for flow measurement based on field programmable gate arrays (FPGA). The correlation algorithm is realized by verilog language, and the result of Modelsim simulation shows that this correlator can be used to calculate the cross functions of random signal. This correlator which has a simple hardware structure, high reliability and high accuracy, can meet the demand of the real-time flow measurement system.

关键词： FPGA Digital correlator Flow measurement Modelsim correlation algorithm

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The FPGA implementation of Matched correlation Filter

The FPGA implementation of Matched Correlation Filter

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IEEE International Conference on Electronics, Communications and Control (ICECC)

作者： La, Chao Liu, Ming Jie Li, Xiao Feng Beijing Inst Technol Sch Mechatron Engn Beijing 100081 Peoples R China

ISBN: (纸本)9781457703218

The Matched correlation filter based on FPGA is designed for quasi real-time processing of impact acceleration signal in this paper. The design integrates match-filtering algorithm with correlation algorithm, proposing matched correlation algorithm. According to this algorithm, the design uses two Radix-4 FFT modules to complete the correlation operations, using single sine wave as matching model signal which has better correlation with impact acceleration signal. Furthermore, a re-sampling module and data integration module are added for the stability and reliability of signal processing. The filter was simulated and demonstrated by Modelsim for its good quasi real-time processing and reliability.

关键词： Matched algorithm correlation algorithm Radix-4 FFT FPGA

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The Analysis Strategy of Neural Activities from Data Recorded from Multielectrode Arrays

The Analysis Strategy of Neural Activities from Data Recorde...

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第十六届嗜铬细胞国际学术会议

作者： Jie Dong~1,Encheng Dong~1,Chen Zhang~1 1.State Key Laboratory of Biomembrane and Membrane Biotechnology,School of Life Sciences,Peking University,Beijing,China

The brain is composed of billions of neurons which communicate with each other through chemical synaptic *** coordination of neural activities among different neurons is essential for the brain to perform complex *** ... 详细信息

关键词： correlation algorithm neuron firing pattern multielectrode arrays

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New Advances on Correlating TEM Cell and OATS Emission Measurements

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IEEE TRANSACTIONS ON ELECTROMAGNETIC COMPATIBILITY 2010年第1期52卷 11-20页

作者： Gerth, Hendrik Fisahn, Sven Garbe, Heyno Haase, Helmut IAV Berlin Germany Leibniz Univ Hannover Inst Elect Engn & Measurement Sci D-30167 Hannover Germany

This paper proposes an improvement for the standard algorithms used to correlate the radiated emission measurements performed in a gigahertz transverse electromagnetic (GTEM) cell to measurements performed at an open area test site (OATS). The improvement compared with standard correlation algorithms lies in the ability to use literally all data measured. This is achieved by using nonlinear regression models in order to estimate the amplitudes of a multipole model. Assuming equally phased dipole moments and using nine measurements, numerical simulations indicate significant superiority of this new algorithm in comparison to the standard approach. The results can be improved further by using additional measurements. The simulation results show strong evidence that the algorithm also provides precise results for the amplitudes, if not all components of the dipole moments are in phase. Experiments with a real-world test object further validate the method.

关键词： correlation algorithm gigahertz transverse electromagnetic (GTEM) cell nonlinear least-squares (NLS) open area test site (OATS)

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Experimental validation of correlating Shack-Hartmann wave-front sensor for a point source object

Experimental validation of correlating Shack-Hartmann wave-f...

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Conference on Advanced Sensor Systems and Applications IV

作者： Chen, Linhui Rao, Changhui Chinese Acad Sci Key Lab Adapt Opt Chengdu 610209 Peoples R China

ISBN: (纸本)9780819483836

To measure the wave-front aberration, the Shack-Hartmann(SH) wave front sensor(WFS) is used in most adaptive optics(AO) systems. The accuracy of the centoid(Center of gravity) detecting of sub-images plays an important role in the performance of SHWFS. Normally the centriods of the point source spots are estimated to determine the local wave-front slopes by a center-of-gravity (CoG) algorithm. However the CoG algorithm suffers from several weaknesses. At first, there are few situations when a standard point source is available, such as situations with strong atmosphere disturbance and low flux. Secondly, CoG suffers significantly from CCD read-out noise. Instead of the traditional CoG, the correlation algorithm to estimate the wave-front slopes is used here, and the main characteristics of this method is analyzed. Analytical results predict this correlation approach presents better linear and robust performance. Moreover both simulation and experimental data from a point source based indoors experiment are carried out to verify the expected conclusions. The result agrees well with the simulation analysis.

关键词： Adaptive Optics Shack-Hartmann wave-front sensor correlation algorithm Center of gravity algorithm point source

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Classification and Identification of Plastic Using Infrared Spectroscopy

Classification and Identification of Plastic Using Infrared ...

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第三届国际自动化测试与仪器仪表学术会议

作者： He Wei,Deng Wenyi,Liu Lishuang,Wu Yingying (Key Laboratory of Modern Measurement & Control Technology(Beijing Information Science & Technology University),Ministry of Education,Beijing 100192 China)

The method for the discrimination of Plastics by infrared spectroscopy was researched in this *** corresponding spectrogram will be produced while the different functional groups of plastics are irradiated by the infrared light. The reason for distinguishing different kinds of plastics is different between the curve shape and peak position of spectrogram corresponding to the different components of plastic,so the processing algorithm based on the curve pertinence and the characteristic peaks position are advanced for processing data derived by the infrared *** is concluded that the correlation algorithm and the characteristic peaks algorithm are good method to discriminate the different kinds of plastic.

关键词： Infrared spectroscopy Characteristic peaks algorithm correlation algorithm

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