Normal plane distribution model for orientation of discontinuity in rock mass 节理岩体强度的分形统计分析
2.
The following is main research work : 1 . geometry characters ( such as tangent plane and normal plane etc . ) and differential coefficient characters are theoretically analyzed in detail , then the intersection differential coefficient system model for trace is constructed 在理论上，系统地分析了交线的几何特征（如切平面和法平面等）和微分特征（如曲面的一阶基本齐式等） ，建立了交线的微分系统跟踪模型，从而为今后进一步研究求交问题提供了一个可行的途径。
3.
Because uav is smaller and lighter than normal plane , the miniature aerial rs system is easily effected by wind , its " stabilities of position and stance are not good . because the load of uav is so finite , the large professional aerial photogrammetry camera can not be installed 微型无人机遥感由于受到无人机平台体积小、重量轻、任务载荷有限等因素的制约，在飞行作业中传感器位置和姿态受气流影响大、稳定性差，而且目前是非专业摄影机成像，这些都大大增加了其影像几何纠正处理的复杂性。
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