摘要:

An upper bound of the number of switch-over points of extremal controls is given for certain linear controllable systems with stationary equations of motion and a set of feasible controls in form of any compact convex polyhedron. For these investigations results of the linear parametric programming are used.

ISSN:0323-3898    

DOI:10.1080/02331937808842470

出版商:Akademic-Verlag    

年代:1978

数据来源: Taylor

摘要:

For optimal control problems with parameters depending on the time, the extended Bellmanean functional equations are in general only sufficient optimality conditions. It is shown by examples that the optimal control problem may have a greater number of solutions than the functional equation of this problem. However, a sufficient condition of the equality of the solution sets of the optimal control problem and the functional equation is given on the basis of rigorous concavity, too.

ISSN:0323-3898    

DOI:10.1080/02331937808842471

出版商:Akademic-Verlag    

年代:1978

数据来源: Taylor

摘要:

In this note we investigate a stochastic dynamic programming problem with countable state space and finite action space. An approximation procedure is given for the numerical solution by a decomposition algorithm of the state space. The optimal policies and minimal value functions of the so-constructed Markovian Decision Process are calculated' by dynamic programming. Convergence theorems are proved and bounds for the minimal value function are obtained.

ISSN:0323-3898    

DOI:10.1080/02331937808842472

出版商:Akademic-Verlag    

年代:1978

数据来源: Taylor

摘要:

G.Uebe: Produktionstheorie. Lecture Notes in Economics and Mathematical Systems 114, Springer-Verlag, Berlin-Heidelberg-New York 1976, XVII, 301 S., DM 28.

ISSN:0323-3898    

DOI:10.1080/02331937808842473

出版商:Akademic-Verlag    

年代:1978

数据来源: Taylor

摘要:

In this paper it is shown that in networks with given means and dispersions of activities the effect of the distribution-type is small. It follows the great importance of Clarks method and of Monte-Carlo-method for practical solving stochastic time-problems.

ISSN:0323-3898    

DOI:10.1080/02331937808842474

出版商:Akademic-Verlag    

年代:1978

数据来源: Taylor

摘要:

In generalization of special cases of the literature a class of stochastic processes (PMP) is defined with an imbedded stochastic marked point process of “basic points” which must not be renewal points. A theorem (“intensity conservation principle”) has been proved concerning a relation between stationary distribution of PMP at arbitrary points in time and distributions and intensities connected with the basic points. This relationship simultaneously yields a general method for determination of stationary quantities at arbitrary points in time by means of the corresponding “imbedded” quantities. Some applications to concrete queueing systems have been demonstrated, where arrival or departure epochs of customers are used as basic points. Under weaker independence assumptions as till now done in the literature, new relations are given.

ISSN:0323-3898    

DOI:10.1080/02331937808842475

出版商:Akademic-Verlag    

年代:1978

数据来源: Taylor

摘要:

L.Kleinrock: Queuieng Theory. Volume 2: Computer Applications. J.Wiley & Sons, New York-London-Sydney-Toronto 1976, £ 18.

ISSN:0323-3898    

DOI:10.1080/02331937808842476

出版商:Akademic-Verlag    

年代:1978

数据来源: Taylor

摘要:

A rigorous proof for the validity of the formulaA=a/(a+b) for the stationary availability of a repairable unit, whereadenotes the mean life time andbthe mean repair time, is given in the case when no any independence assumption about the sequence of life and repair times is made.

ISSN:0323-3898    

DOI:10.1080/02331937808842477

出版商:Akademic-Verlag    

年代:1978

数据来源: Taylor

摘要:

Using methods similar to those of Marshall [3], bounds for the mean stationary waiting time and the stationary probability of wait in GI/G/1 are obtained. In particular, two-sided bounds for queues with interarrival times having an Erlang distribution are given, and bounds which are basing on special properties of the distribution of difference of interarrival and service times.

ISSN:0323-3898    

DOI:10.1080/02331937808842478

出版商:Akademic-Verlag    

年代:1978

数据来源: Taylor

摘要:

H.-J. Schwefel: Numerische Optimierung von Computer-Modellen mittels der Evolutionsstrategie. Birkhäuser-Verlag, Basel und Stuttgart 1977, ISR 26, 390 S., sFr 48,–

ISSN:0323-3898    

DOI:10.1080/02331937808842479

出版商:Akademic-Verlag    

年代:1978

数据来源: Taylor