研究了一个多台排队系统队长过程作为外部随机环境的流模型.使用Laplace变换(LT)方法,发现缓冲器容量(库存量)分布的LT具有简洁的幂结构.进一步地,借助于Laplace—Stieltjes变换(LST)和LT之间的内在关系,给出了库存量分布的LST及平均库存量.最后,借助于一些数值例子刻画了系统参数对平均库存量及空库概率的影响.
This paper studies a fluid model modulated by a multi-server queue. We present a Laplace transform (LT) method, by which we obtain a simple structure of a power series satisfied by the LT of the stationary distribution of the buffer content. Furthermore, we give the Laplace-Stieltjes transform (LST) and the mean of the buffer content based on the relationship between LT and LST of the probability distribution. Finally, we present some numerical examples to demonstrate the effects of parameters on the expected buffer content and the probability of an empty buffer.