resistance238023924024124224350010002000time (hour)4600ratio of y(t)/y(0)1.00001.0021.0041.00650010002000time (hour)4600cdf of T (p)0.000.20.40.60.81.010002000time (thousand hours)3000OLSE tp1.0cdf of T (p)0.00.050.20.40.60.80.100.15time0.200.25WLSE tp1.0cdf of T (p)0.00.050.20.40.60.80.100.15time0.200.25