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排序方式: 共有333条查询结果,搜索用时 31 毫秒
1.
V. N. Tsygankov V. V. Safonov A. I. Kozlov V. P. Gavrilov 《Inorganic Materials》2003,39(10):1076-1078
The GeO2–NiO system is studied in the stability range of Ni2GeO4 by temperature-dependent resistivity measurements, in combination with x-ray diffraction, differential thermal analysis, and thermogravimetry. The resistivity of the starting mixtures and heat-treated samples is measured in the composition range 55–90 mol % NiO. The effect of air humidity on the resistivity of the samples is examined. 相似文献
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It is shown by way of simple examples that the gap metric may be inappropriate for quantifying the uncertainty for lightly damped systems, e.g. flexible structures such as spacecraft and aircraft. Two plants having otherwise identical transfer functions, except that their zeros on the imaginary axis are located slightly apart due to perturbations, are usually considered very close, i.e. their closed-loop characteristics under most stabilizing feedbacks are very similar. However, it is demonstrated that when the gap is used to quantify the plant perturbations, the computed gap may be large. Consequently, the stability of the perturbed plant with a stabilizing controller designed for the nominal plant cannot be guaranteed via the existing stability theorems using the gap metric 相似文献
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The closed-loop singular values of an LQ regulator transfer function are proved to be no greater than the singular values of the open-loop transfer function and, in the case of output-weighted cost function, to be no greater than the output-weighting parameter 相似文献
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Results are presented from predictions of the quality indices of metal products used in critical applications. The predictions
are obtained for combinations of technological factors that are not used in the actual production process. The reliability
of the predictions is confirmed by the fact that the index values obtained with the use of regression models agree with the
values obtained using corresponding genetic algorithms. The advantages of the methodology described in the article are demonstrated
using the example of analysis of the multi-stage cold rolling of tubes made of zirconium alloys. The introduction of procedures
for making technological predictions will help make production processes more efficient and, thus, more competitive.
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Translated from Metallurg, No. 2, pp. 31–36, February, 2007. 相似文献
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Conclusions Despite the accumulated evidence, many of the investigators as of quite recently have failed to understand that behavioral strategy or decision rules can be inherited and evolve and that they are subject to certain constraints that cannot be surmounted other than by natural selection. For example, in [9, p. 422] we read: The evolutionary pressure cannot act upon the relative contents of social interactions favoring certain individuals over others. The present study shows that the following scheme of conflict, which favors those individuals that conform to it with a better accuracy, can be evolutionary stable. On the basis of the information they receive, the partners estimate the role situation and the equilibrium pair of elementary strategies and use their strategies. If the role situations of the partners are coordinated, the partners cooperate in reducing the conflict and define its result according to AIS. If AIS are not coordinated, they cooperate in reducing the conflict if its expected loss for each is greater than the expected payoff; they escalate the against those that have a lesser set of elementary strategies but also against those that have a less accurate mechanism of AIS recognition. A poor accuracy of recognition mechanism would replace a strictly equilibrium ESS with a mixed strategy.From the point of view of behavioral control, the multilevel conflict model shows that generally for controlling the choices at a certain level actions of an equally high level are necessary. It is impossible, for example, to accomplish certain economic choices by using only informational actions.Translated from Kibernetika, No. 1, pp. 90–98, January–February, 1988. 相似文献
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An efficient and reliable algorithm for selecting the optimal exposure in video cameras of technicalvision systems is proposed.
The algorithm is based on the Otsu binarization method. A theoretical justification of the convergence of the proposed algorithm
is given. At the end of the paper, we discuss software and hardware aspects of a real-world implementation of our algorithm,
which confirmed its efficiency and stability.
Aleksandr Germanovich Safonov. Born in 1952. Received M. Eng. from the Moscow Power Engineering Institute in 1975, as well as a D.Eng. in 1982. Safonov
currently serves as a Department Head at the Lukin Institute of Physical Problems. His research interests include automatic
information processing, image recognition, and microelectronics. He is the author of over 50 research publications.
Ivan Alekseevich Kozlitin. Born in 1983. Received M.Eng. from the Moscow Power Engineering Institute in 2005. Kozlitin is currently a Ph.D. student
at IMM of the Russian Academy of Sciences and a Research Fellow at the Lukin Institute of Physical Problems. His research
interests include mathematic modelling, numerical methods, physics of imperfect plasma, and image processing. He is the author
of ten research publications. 相似文献
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I. V. Safonov G. N. Mavrin K. A. Kryzhanovsky 《Pattern Recognition and Image Analysis》2008,18(1):112-117
This paper presents an algorithm for segmentation of convex cells with partially undefined edges based on application of a
marker-controlled watershed transform to a combination of a source grayscale image and the result of a “geodesic distance”
morphological operation, applied to the result of binarization of a source image. The presented approach is used in computer
image processing systems for analysis of several industrial materials.
The text was submitted by the authors in English.
Ilia V. Safonov received his MS degree in automatic and electronic engineering from Moscow Engineering Physics Institute/University (MEPhI),
Russia in 1994 and his PhD degree in computer science from MEPhI in 1997. Since 1998 he is an associate professor of faculty
of Cybernetics of MEPhI while conducting researches in image segmentation, features extraction and pattern recognition problems.
Since 2004, Dr. I. Safonov has joint Image Enhancement Technology Group, Printing Technology Lab, Samsung Research Center,
Moscow, Russia where he is engaged in photo, video, and document image enhancement projects.
Konstantin A. Kryzhanovsky received the MS degree in cybernetics from Moscow Engineering Physics Institute/University (MEPhI), Russia in 2000. Since
2006 he is an assistant professor of faculty of Cybernetics of MEPhI. He is presently working towards his Ph.D. degree. His
current research interests include image processing and pattern recognition.
Gennady N. Mavrin received his MS degree in automatic and electronic engineering from Moscow Engineering Physics Institute/University (MEPhI),
Russia in 1998. Since 2002 he is an assistant professor of faculty of Cybernetics of MEPhI. He is currently pursuing the PhD
degree. His research interests include image segmentation and feature extraction problems. 相似文献