文章研究以0为反射壁和以0为拟飞射壁的两种生灭过程.通过引入线性方程组和推移算子,证明了朱全新等人(2004)的三个主要结果;准确地定义了m^ai,e^ai,N^ai,R^a(n≥0)等一系列特征数,并表明了这些特征数的概率意义;最后,求出了R^a〈∞(n≥0)的一个等价条件.应该注意的是:杨向群(1986),王梓坤(1996)的一些结果是这里a=0时的特例,因此从某种意义上说,此文是对杨向群(1986),王梓坤(1996)的结果的进一步推广和完善.
This paper deals with two kinds of birth and death processes with state 0 as their reflecting and quasi-leap-reflecting barriers. First, by proposing a system of linear equations and shift operators,it proves three main results in Zhu and Dai's paper(2004) ; then ,a precise definition of the characteristic numbers such as m^ai, N^ai, R^a, e^ai (a≥0), etc is given and their probability meaning is showed; finally,an equivalent condition of R^a〈∞ ≥0) is provided. To some extent,the paper further extends the results in previous papers.