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 reputati...
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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.
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...
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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.
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 o...
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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..
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 applicat...
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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.
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 measu...
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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.
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, proposin...
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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.
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 *** ...
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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 *** have developed
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 ...
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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.
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 importan...
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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.
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 infr...
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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.
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