The beam of flashlight diverges, but it can be refocused with lenses . 一个发散的闪光灯束可以用透镜重新聚焦。
In order to optimize all fields in calculation , the method of discrete group with random , random cross operation and variation operation was adopted 但由于采用随机交叉和变异操作,优化结果始终是发散的。
But a cyclic function whose variable ( x ) has the cycle of 2 n has been constructed , which fourier progression is radiation in some given point 然而,就有人构造了?个是变量x的2周期函数,它的fourier级数在给定的点是发散的。
Some regularization . such as cut - off method , contour integration method and general ? - function method , used in calculating casimir energy was discussed too 并结合casimir能量的计算,对用来消除发散的几种正规化方法,如截断法、回路积分法和广义黎曼函数法等,作简单介绍。
Comparable to delhi in the 14th century , the city , with an estimated population of half a million , covered 33 sq km and was surrounded by several concentric lines of fortification 估计该城有50万人口,面积33平方千米,周围环绕着几条发散的防御工事,这与14世纪的德里有相似之处。