每个离散的数据片断需要大量结构，所以有效数据的比例非常低。
Each discrete piece of data requires a lot of structure, and the ratio of data to structure is extremely low.
分析了在离散状态下比例因子对不变矩特征的影响，构造了一种新的不变矩，使其具有平移、旋转和比例因子的不变性。
This paper analyses the influence of scale factor on moment invariant features in discrete, constructs a new moment invariant with both scale, translation and rotating invariance.
数值计算结果表明，随时间抖动范围增大和频率提高，离散功率谱分量所占比例下降。
The numerical results demonstrate that the larger the zone of timing jitter and the higher the frequency, the less proportion the discrete PSD component is in the total PSD.
通过该算法模块，可以将离散数据生产出任意比例尺下的格网DEM数据，具有一定的实际意义。
In the algorithm module, the DEM data with any scale can be produced from scatter data, which is of significance.
通过该算法模块，可以将离散数据生产出任意比例尺下的格网DEM数据，具有一定的实际意义。
In the algorithm module, the DEM data with any scale can be produced from scatter data, which is of significance.
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