英德
有道
百度
谷歌
图片
维基
百科
划分数
partition value
- 本文根据集合的划分与覆盖的定义，利用容斥定理和集合理论，给出了有限集合上的划分与等价关系、完全覆盖与相容关系的关系，以及有限集合上的划分数和完全覆盖数的计算公式。
According to the partition of set and the definition of covering, this article which takes advantages of the admissible and repelling law and the set theories indicates the relationship of partition and equality, special-covering and admission and the accounting formula of partition numerals and special-covering numerals. - 它首先利用势基函数对一维灰度直方图拟合，通过势函数聚类自动确定划分类数；然后在灰度共生矩阵的基础上，依据形状连通度准则，求得使形状连通度最大的一组分割阈值；最后按该组分割阈值执行多阈值图像分割。
Firstly, the 1-D graylevel histogram of the image is fitted by potential base function and the classification number is then determined by clustering; secondly, the multi segmentation thresholds are obtained based on the graylevel co-occurrence matrix. - 仿真结果表明采用最适度分层数进行划分后，网络寿命明显得到延长。
Simulation analysis is conducted, and the results show that the network life-time can be prolonged effectively with the optimum layers.
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