Thus the improved form of Heaviside expansion obtained.
文中还给出了海维赛展开式的改进形式。
2
If you are ambitious, try this alternative procedure: Note that f'(x)involves the Heaviside stepfunction.
如果你有雄心的话，可以用另外步骤试之：注意f’（X）包含亥维塞阶梯函数。
3
That discontinuous function is not only convenient for integral and derivative, but also can be better reflect the displacement character after crack than heaviside function.