However, these two values compare equal with== so if you want to distinguish between them, you need to use Math. copySign ( 10,-0.0) or Math. signum() 不过,使用==比较这两个值时,它们是相等的。
On the Li é nard Equation Without the Signum Condition 关于不具符号函数条件的Liénard方程
The method of signum function is used approximately, while errors propagate through BP network for parameter adjustment. It gains the better control result than before, on the basis of guaranteeing the causal relationship between input and output. 对于误差经被控对象回传到神经网络进行参数调整的过程,采用符号函数法进行近似处理,在保证了输入和输出的因果关系的基础上,取得了较好的控制效果。