根据Ｆｒｅｓｎｅｌ—Ｋｉｒｃｈｈｏｆｆ原理，从文［１］中公式（８）出发，＆出了劈形和平顶直边障碍物的绕射场的求解公式。本文公式简洁且物理思想清晰，克服了ＧＴＤ处理过渡场的困难，便于......

Reduction of falls of elderly people has been an active research area for many years.Falls of older people can be signic......