It is proved that the saddle point is intrinsic attribute of system during its evolution when 4 sets of ideal sine wave and 3 sets of observed seismic wave are input to the slope.
通过对边坡输入4组理想正弦波和3组实测地震波论证了边坡系统演化过程中的鞍点是系统的固有属性；
Data sets of point and interval dimensions are important in spatial database system and GIS.
点和区间混合型维度数据集是空间数据库系统和GIS中重要的数据对象。
This paper evolves the measure of the system parameter corresponding to the bifurcation point (set) in parameter space and sets up the mathematical expression formula of the potential of accident.
在参量空间，论文以分岔点(集)为参照导出对系统参量的度量，建立事故潜势的数学表达式。
This paper discussed the way that sets up the system of deformation correction while making the map digital with scanning, by using point of map margin as reference.
讨论了用扫描法将地图数字化时，以图廓点为参考点建立形变校正系统的问题。
This paper discussed the way that sets up the system of deformation correction while making the map digital with scanning, by using point of map margin as reference.
讨论了用扫描法将地图数字化时，以图廓点为参考点建立形变校正系统的问题。
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