A.F. Ulasen - Ph. D. (Eng.), Associate Professor, Head of the Department of Electronic Warfare Means, Russian Armed Forces Army Air Defense Military Academy named after Marshal of the Soviet Union A.M. Vasilevsky (Smo-lensk). E-mail: ulas.s@mail.ru

In article the way of the analysis and calculation of reliability of information systems of a special purpose taking into account real service conditions of the equipment is considered. The method of «nodal devices in reserve group» allows to solve a problem of determination of reliability by search of all possible conditions of nodal devices which have a small amount of states with known probabilities, thus operating state of group in general is considered.

 

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