On the basis of these conceptions, we advance the computational formula of the absolute incidence degree, which keep invariant of translational transformation, and give a computation example at last.
给出关联空间及其绝对关联度的概念，在此基础上，提出一种保持平移变换不变的绝对关联度计算公式。
2
Then on the basis of invariant manifold theory and Poincaré section, a transfer trajetory between L1 and L2 of the Earth-Moon system was given.