This paper deals with the initial plus trees selected in the excellent plantations, and 60 excellent phenotypes were ga......

1923年人类学家B.Malinowski正式提出了“语境”这一概念.之后,对语境的研究主要经历了从传统语境向认知语境的发展过程.关联理论......

为克服三维近不可压缩问题的体积闭锁现象,建立了两种基于六面体单元的Wilson非协调元计算格式,并将其应用于两类含混合边界条件的......

Picea crassifolia and P.wilsonii,commonly used for afforestation in northern China,are increasingly likely to be subject......

本文对导弹井盖进行了动力分析,以子空间迭代法及Wilson-θ法为基础编制了DTCP有限元程序。分析了四周连续支承的圆形层状复合厚板......