Measurement of the time-constant spectrum: Systematic errors, correction

Székely, V.; Szalai, Albin

doi:10.1016/j.mejo.2012.05.011

Cited by 16 publications

(6 citation statements)

References 7 publications

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“…For performance control, various service disciplines can be applied: a) Implementation the choice from the queue of the next application in one way or another, for example, FCFS, FCLS, SIRO; b) Implementation the ordering of requests according to some of their particular characteristics, for example, by the number of requests of the corresponding type that came to the info -communication environment during the last reconfiguration cycle; c) Implementation the solution of optimization problems for controlled Markov chains using dynamic programming or the Howard method [21][22][23][24][25] for various complex risk functions.…”

Section: Resultsmentioning

confidence: 99%

Information processing in info-communication media of geodynamic monitoring on the basis of adaptive queuing system

et al. 2020

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The paper considers the problem of modeling the processing of geodynamic information in a reconfigurable information-communication environment of geodynamic monitoring based on an adaptive queuing system. It was established that due to the complexity and diversity of geodynamic information, the number of geodynamic control points is expanding and the number of controlled parameters, the number of controlled objects of natural-technical systems (NTS) are increasing. This leads to an increase in the overall load on the info-communication monitoring environment, an increase in the processing time and the response time of the NTS geodynamic stability control system to negative changes. This leads to the need for adaptive optimization of the info-communication environment of geodynamic monitoring. The model of a composite stream describing the change in the nature of the tasks performed by geodynamic monitoring was determined, approaches to reconfiguration management based on minimization of the loss functional were proposed. The constructed model of the process of functioning and the analytical dependencies obtained for it allow analyzing the process of processing geodynamic information in info-communication environments to optimize the mechanisms of their functioning.

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Section: Resultsmentioning

confidence: 99%

Information processing in info-communication media of geodynamic monitoring on the basis of adaptive queuing system

et al. 2020

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“…In this case, it is often difficult to obtain an app roximating dependency well coinciding with the TTC initial area. To reduce the influence of these factors when obtaining an approximating dependence, it is possible to use the spectral density of time constants (SDTC) [16,19,20,23].…”

Section: Discussionmentioning

confidence: 99%

“…This is manifested in abrupt changes in the graph of the structure function, and is easily determined on the graph of the first derivative of this function (the differential structure function). The method of structure functions is constantly refined and supplemented [21][22][23][24]. Critical factors for it are the noise level, which is always present in the TTR experimental determination and the need to analyze relatively small values of thermal characteristics, which may result in "peak emissions" in the beginning of the structural function graph, which in turn happens due to the influence of the first of the above mentioned factors.…”

Section: Literature Reviewmentioning

confidence: 99%

Determination of transient thermal characteristics for thermal electric behavioral models of integrated circuits

Potapov

Shkolin

2020

Bulletin EEI

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In the current study, it was tried to describe a method for determining thermal characteristics of integrated micro-circuits to identify thermal parameters of multidisciplinary (thermal-electric) behavioral models. The problem is solved on the example of high-frequency pulse voltage converters. A solution was proposed to refine the minimum structure of the thermoelectric model based on an iterative least squares method using the Levenberg-Marquardt algorithm, as well as a graph of the spectral den-sity of time constants. This made it possible to reduce the influence of the filtering factor in the deconvolution operation when building a thermal model using the structural function of the thermal characteristic transition. Also, the results obtained can be used to build integrated circuits (IC) behavioral models, taking into account the thermal processes occurring in them.

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“…Due to the fact that distances from the object and to the source of the probing signal are initially different, registration errors of electromagnetic field at different observation points have different variances. Therefore, a distinctive feature of the application of processing methods in geodynamic measuring systems, which allows to significantly reduce the error of geodynamic estimates, is the use of weight coefficients [13][14][15][16][17][18][19][20]. Weight coefficients are determined based on the dependence of the variance of approximation errors of the field parameter on the argument, and accordingly determined by localization of the field registration point ri in relation to the probing field source r j and the object of study: Interpretation problems of geological section parameters in general, and localization of heterogeneity in particular, are ill-posed, therefore, application of regularization by A. N. Tikhonov is necessary [14,15].…”

Section: Methodsmentioning

confidence: 99%

Application of phase-metric compensation method for geoelectric control of near-surface geodynamic processes

et al. 2020

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This work is devoted to the application of the compensation method of geoelectric control using the field phase characteristics for the detection and localization of geodynamic processes on example of the development of the karst-suffusion cavity. High noise immunity of the phase-metric registration method of geoelectric signals in comparison with amplitude parameters of the anomalous components of electromagnetic field, usually used to analyze the results of observations, is noted. A formalized approach to the use of phase characteristics of the field for the interpretation of monitoring data and associated problem of geodynamic processes localization is developed. In the framework of this approach, the section parameters are proposed to determine by the minimum sum of weighted mean square interpretation error and regularizing functional containing a priori information about the geoelectric section. To check localization possibility of the spherical karst-suffusion cavity, simulation of the amplitude and phase anomalous components of the field potential, as well as the standard error of heterogeneity localization, when moving the sphere center along the installation profile, is carried out. Simulation has shown a good potential differentiation from the inhomogeneity position, the highest accuracy of localization is achieved with combined use of amplitude and phase field components in the problem of inhomogeneity localization.

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Measurement of the time-constant spectrum: Systematic errors, correction

Cited by 16 publications

References 7 publications

Information processing in info-communication media of geodynamic monitoring on the basis of adaptive queuing system

Information processing in info-communication media of geodynamic monitoring on the basis of adaptive queuing system

Determination of transient thermal characteristics for thermal electric behavioral models of integrated circuits

Application of phase-metric compensation method for geoelectric control of near-surface geodynamic processes

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