Przedstawiono możliwość podejmowania decyzji eksploatacyjnych dotyczących sytuacji gdy decydent dysponuje informacją aprioryczną o stanie technicznym urządzeń, na przykład uzyskana z badań niezawodności urządzeń niezbędnych do wykonania zadania, wyrażoną w formie prawdopodobieństw. Do opracowania modelu umożliwiającego podejmowanie takich decyzji eksploatacyjnych wykorzystano elementy bayesowskiej staty stycznej teorii decyzji

The paper rises the issue of a possibility to consider some achievements of the quantum mechanics in the diagnostics of marine energy machines and devices. It has been shown that the observations from the quantum mechanics and technical diagnostics obtained in the knowledge field of the empirical research are convergent. The need has been justified as for empirical research to make not only calculations of errors, but also to determine the uncertainty of test results (measurements) and identify whether they are mainly the result of inaccuracy of energy machines / devices as the research objects – or inaccuracy of the measuring technique (measuring methods and means). Moreover, the possibility of using mathematical statistics has been presented for describing the results of the studies connected with determining the instantaneous values of the measured quantities. It has been shown at the same time the necessity for the empirical research of a clear definition of the instantaneous value characterized by two coordinates: a measured value of a physical quantity and a value of time which the measured value of the physical quantity is assigned to

The paper shows a necessity to consider the processes of load on and wear of tribological systems in Diesel engines (and therefore the changes in their states) in real conditions as random processes. This means that mathematical models for these processes can be random functions with an argument which is time (t) and with values which are random variables such as loads and wear of particular tribological systems. The load properties for the tribological systems have been presented as the main causes of their failures. It has been signaled that a stochastic dependence should be expected between mechanical load and thermal load, whose the intensity (force) can be defined by Czuprow’s convergence coefficient. A proposal has been submitted to accept that the tribological system load in Diesel engines is a stationary process with asymptotically independent increments. The reasons for this proposal have been presented in the form of relevant hypotheses and an exemplary graph of changes in pressure and temperature in an engine cylinder under operation. Also it has been signaled that the models of wear processes in tribological systems may be stochastic processes with special properties called semi-Markov processes. The wear properties for these systems have been explained in the form of relevant hypotheses

The paper proposes a model of diesel engine starting process as a semi-Markov process which is discrete in states and continuous during operation. The states of this process are: cold state of the engine (s1), warm state (s2) and hot state of the engine (s3). The concept of using such a model for the determination of the quantity of harmful sub-stances emitted in exhaust gases during the start up of the engine has been presented.

The paper contains a formal description of ship propulsion system operation process. The model of the process is presented in the form of two-dimensional stochastic process of which coordinates are semi-MArkov processes of the final states set. The former process describes the process of changes in technical states of ship propulsion systems, the latter - the process of changes in their operating states a monovariate model of ship propulsion systems operation process has also been proposed.

Przedstawiono interpretacją działania warstwy granicznej substancji smarujących. Do oceny procesu pogarszania się działania tej warstwy zaproponowano model jednorodnego procesu Poissona