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- Xianping Guo, Weiping Zhu
- 2000

In this paper, we consider denumerable state continuous time Markov decision processes with (possibly unbounded) transition and cost rates under average criterion. We present a set of conditions and prove the existence of both average cost optimal stationary policies and a solution of the average optimality equation under the conditions. The results in this… (More)

—In this paper, we give conditions for the existence of average optimal policies for continuous-time controlled Markov chains with a denumerable state–space and Borel action sets. The transition rates are allowed to be unbounded, and the reward/cost rates may have neither upper nor lower bounds. In the spirit of the " drift and monotonicity " conditions for… (More)

—In a partially observable Markov decision process (POMDP), if the reward can be observed at each step, then the observed reward history contains information on the unknown state. This information, in addition to the information contained in the observation history, can be used to update the state probability distribution. The policy thus obtained is called… (More)

- Liuer Ye, Xianping Guo, Onésimo Hernández-Lerma
- 2007

This paper is about the existence and regularity of the transition probability matrix of a nonhomogeneous continuous-time Markov process with a countable state space. A standard approach to prove the existence of such a transition matrix is to begin with a continuous (in t) and conservative matrix Q(t) = [q ij (t)] of non-homogeneous transition rates q ij… (More)