The relation between space of separated layers and ranges of surface subsidence is obtained.
应用层状覆岩的自重应力平衡状态,应用静水压力模型, 覆岩层的垂直静力平衡条件, 设某深度岩层的理论静压力为PH,而实际的竖直压力为Ps,推导出覆岩离层的条件关系式,覆岩离层空间与地表沉陷幅度的关系式,当PH>Ps时,覆岩离层产生。
Cold War and America's Outer Space Policy (1945-1969);
冷战与美国的外层空间政策（1945—1969）
On the Challenge of Commercial Activity of Outer Space to the International Law;
论外层空间商业活动对国际法的挑战