浅谈初生细毛羔羊的接羔技术

接羔是养羊的收获季节，是一个关键的生产环节，要认真进行组织领导，配备一定的技术力量和劳动力，准备好羊舍，安排保护好产羔草场，储备足够的饲草饲料，做好羔羊产后的护理疾病防治和培育，才能提高羔羊的繁殖成活率。

DIFFERENTIAL QUADRATURE FOR AXISYMMETRIC GEOMETRICALLY NONLINEAR ANALYSIS OF CIRCULAR PLATES

New developments have been made on the applications of the differential quadrature(DQ)method to analysis of structural problems recently.The method is used to obtain solutions of large deflections, membrane and bending stresses of circular plates with movable and immovable edges under uniform pressures or a central point load.The shortcomings existing in the earlier analysis by the DQ method have been overcome by a new approach in applying the boundary conditions. The accuracy and the efficiency of the newly developed method for solving nonlinear problems are demonstrated.

轻质穿透式薄膜盖的分析、设计与实验研究

穿透式导弹发射箱薄膜盖的研制是导弹运载工具轻质化的一部分 ,由于其一方面需能承受一定的压力 ,即需具有足够的强度 ,另一方面又要求顶破力较小 ,而这两个要求是互相矛盾的。本文通过有限元仿真计算 ,确定了满足这两项要求的方案。然后研制了实物 ,进行了实验验证 ,设计分析的结果与实验结果吻合。本文的研究为轻质穿透式薄膜盖的研制和应用提供了方法和依据。