roughness value

Consequently, at the macroscopic crack branching velocity, the experimental fracture surface energy and the fracture surface roughness; have no single value in such materials.

因此，对这种材料在宏观裂纹分叉速度时，实验断裂表面能及断裂表面韧性没有单一值。

The BP neural network is introduced in direct inversion with measured data of flow as input value and river roughness as output value.

基于数据挖掘的思想，本文提出一种新的河网糙率直接反演方法。

To provide a theoretical basis for the conical stylus cone angle selection. ( 2) Analysis of the stylus tip radius and the stylus static pressure causing timber roughness parameter measurement error, calculation of the roughness measurement error value caused by the different tip radius.

分析触针针尖圆角半径和触针静压力引起的木材粗糙度测量误差，计算不同针尖半径造成的粗糙度测量误差值。

This antireflective coating possesses smooth and even surface, its average roughness is estimated having the value of RMS ( 1.201) and RA ( 0.934), and the specific scratch-resistant is good.

该增透膜的表面均匀性良好，均方根粗糙度（RMS）为1.201，平均粗糙度（RA）为0.934，具有一定的耐擦除性。

Based on the field surface shallow flow experiments, the roughness coefficient value ( n) on different land have been quantitatively demonstrated by changed Manning Formula in this pa-per.

在野外小区径流实验基础上，通过经转换的曼宁公式，对不同坡地地表的糙率系数n值进行了定量研究。

Besides, the Rd value is independent of measuring direction and it is corresponding to the roughness of the area where it describes.

此外，Rd的取值与测量方向无关，适合一一对应地描述某一区域的粗糙程度。