
Discrete-Time System under General Probability Distribution ◾ 75
e status transfer relationship of a discrete system is shown in Figure 4.13.
ese units are different from a continuous situation because they may fail at the
same time. So, status 0 can directly transfer to status 3.
erefore, make P
0
(k) stand for the probability that system has been in 0
status at the time of k, P
1
(k, j) standard for the probability that system has been
in 1 status for j unit time at the time of k, P
2
(k, j) standard for the probability
that system has been in 2 status for j unit time at the time of k, P
3
(k, j) stand
for the probability that system directly t ...