By the first integral method, the existence, uniqueness and nonexistence of solutions for some nonlinear ordinary differential equations with singularboundarycondition are discussed.
用首次积分法，讨论了带奇异边界条件的非线性常微分方程解的存在性、不存在性和唯一性。
2
The author discusses a class of general of singularboundary value problems by using the first integral method, and the necessary and sufficient condition of positive solutions was obtained.
运用首次积分法讨论了较广泛的一类常微分方程边值问题，得到了正解存在的充要条件。
3
Under the condition of no singular position and satisfying requirement of hybrid drive, it analyzes the boundary curve construction and feature of the three types of hybrid input five bar mechanism.