After switching, the original state of circuit capacity voltage or circuit inductance current hasn t the jump normally, but sometimes there can be the jump.

The results indicate that annual temperature has three relatively big jumps in recent one hundred years which happens in 1920, 1955 and 1978 respectively.

The jump was defined as the level that the preceding numbers of R data could not completely describe the present value.

In the cutset of capacitive branch in which voltage s leaping is possible, if there is no impulse current in those branches except for capacitive ones, capacitive charge is conservational, otherwise it may be not conservational.

This paper provides three examples of sudden change phenomenon involved leaps of derivative,and original function is continuous.

The law that the voltage on a capacitance and the current in a inductance can t leap is deduced in the case that the voltage and the current are finite.

In this paper, the reconstruction of 6 regional dry /wet grade series with one--year resolution for the last 1 033 years in East China and the variation feature of them, such as periodicity and abrupt change, are presented.

With the help of a 10a slipping window,we find that those 10a global had an abrupt change between 1981—1987a,and so did Area Ⅰ and Ⅱ.

Continuity on first derivative of wave function is discussed by means of several instances of finite and infinite transitions of potential function and hereby continuity conditions is pinpointed.