This paper presents an efficient method of modelling jointed rock by using the boundary ele-ment method via the concept of multiregion and non-linear model of joint and fault. 邊界元法廣泛應用于巖石力學(xué)問(wèn)題的最大障礙是巖體的非均質(zhì)及其包含的大量節理斷層，本文采用多子域思想結合節理斷層的非線(xiàn)性模型較好地解決了這一難題。
Utilization and fixation of the distant heterosis in rice by one line method has been an exploratory work in rice breeding with great enticement and difficulty. 通過(guò)一系法利用和固定水稻的遠緣雜種優(yōu)勢是一項具有極大誘惑力但難度頗大的科研難題。
