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EN
Set the difference-differential equations (DDE) for expected incomes in multilinear system of random topology HM (Howard-Matalytski) queueing network (QN) with single type messages are obtained. Incomes from transitions between network states depend on time. In case of the closed networks the method of Laplace transformation is applied to a finding of incomes.
EN
Investigation of the closed queuing network with incomes is carried out. This network can be applied as a probabilistic model of incomes changing in a banking network. The case when incomes of transitions between states of network are random variables is considered. The technique for an estimation of expected incomes of cen-tral queuing system, peripheral and network as a whole is offered in the paper. Systems of linear equations for obtaining of expected incomes of queuing systems are received. Expected incomes depend on an average requests number in it. Values of average requests number in systems depend on time is proposed, to find with help of the method, recurrent on time moments.
EN
We will describe a change of the incomes in banking networks by means of various queueing networks (QN). Earlier, in paper [1] banking networks were described by means of closed Markov QN, in the papers [2, 3] the model of a banking computer network by means of opened Markov QN bas been constructed. It bas been carried out research of models by approximate analytical methods. Models, based on closed QN, have been studied for cases, when incomes tram passages between states either are con-stants, or they depend on the stare of network, or they are determined functions of time. For such mod-els, relations for expected incomes calculation have been received. Cases, when incomes from passages between states of network are random variables, and also cases, when non-Markov QN is the model of banking network, have remained unstudied considering that they are intricate problems. Furthermore, not always it is possible to obtain values for the expected incomes of networks in acceptable processor time because of necessity of finding the solution of large dimensional differential equations systems; also restriction on considered networks follows tram it. In connection with it, in this paper for analysis of such complex models the method of computer simulation is proposed to use. The essence of this method is a computer simulation of banking network functioning process at any specified time interval. It is usually expedient to simulate at large time intervals, however, with it increasing also the computational error of different characteristics obtaining grows.
EN
In this paper incomes in Markov queueing network with central system have been analyzed. Such network is a model of a banking network. Incomes for network's passages between its states depend on time.
EN
Investigation of the stochastic model of incomes changing in the banking network is presented. The open exponential queueing network applies as model.
PL
Problematyka automatyzacji i sterowania maszyn przodkowych jest jedną z podstawowych dziedzin, którymi Centrum Elektryfikacji i Automatyzacji Górnictwa EMAG zajmuje się przez cały okres swego istnienia. Artykuł wprowadza w powyższą problematykę. Autorzy na przykładzie dwóch podstawowych maszyn przodkowych: kombajnów ścianowych i chodnikowych, nawiązują do rozwoju koncepcji automatyzacji i sterowania tych maszyn, które doprowadziły do obecnych rozwiązań stosowanych w górnictwie.
EN
Automation and control of mineface machines make the main problems the EMAG Centre has dealt with over the whole period of its existance. He article introduces into these problems. On the example of two basic mineface machines, longwall cutter-loaders and heading machines the authors consider the ideas of automatization and control of these machines, that have resulted in use of these solutions in mining.
PL
W referacie dokonano analizy wpływu elektronizacji kombajnu na poprawę jakości maszyn przeprowadzonej za okres od uruchomienia produkcji kombajnów KGS-245 do najnowszych rozwiązań zastosowanych w kombajnach KGS-800, KGS-485 i KGE-1000/3,3 kV produkcji FM FAMUR S.A. Skoncentrowano się na następujących podstawowych dziedzinach elektronizacji kombajnów: sterowaniu, diagnostyce, nadzorze dyspozytorskim, rejestracji pracy kombajnu.
EN
The article analyses the effects of electronics used in cutter-loaders on quality improvement of machines, within the period from starting production of the KGS-245 cutter-loaders to the newest solutions used in the KGS-800, KGS-485 and KGE-1000/3,3 kV cutter-loaders produced by the FAMUR Machine-Building Factory. The following domains of electronics used in cutter-loaders have been considered: control, diagnostics, dispatch supervision, recording of cutter-loader operation.
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