We presented weighted mean roughness, a new concept based on rough sets theory which is regarded as the criteria for choosing attributes.
基于粗糙集的理论提出了加权平均粗糙度的概念，将其作为选择分离属性的标准。
Then the decision tree of electric power grid diagnosis is built by using weighted mean roughness as separating attributes standard to realize electric power grid fault diagnosis.
然后采用加权平均粗糙度的概念，作为选择分离属性的标准，构造电网故障决策树，从而实现对电网的故障诊断。
According to the value of weighted mean roughness the priority of different characteristic information can be distinguished, so the proposed method possesses strong tolerant ability.
按加权平均粗糙集的大小区分层内各特征信息的优先级，具有很强的容错能力。
In the process of constructing a decision tree, weighted mean roughness, a new concept based on rough set theory which is regarded as the criteria for choosing attributes is applied.
介绍了决策树算法的含义和构筑方法，对基于加权平均粗糙度构造决策树算法进行改进，通过实例说明了改进算法的优势。
The effect of wall roughness on gas-particle flows in a horizontal backward-facing step is studied using a phase-Doppler particle anemometer (PDPA) by measuring the mean and RMS particle velocities.
用相位多普勒颗粒测速仪（PDPA）测量了颗粒的平均与脉动速度，研究了壁面粗糙度对水平后台阶气粒两相流动的影响。
A real complicated engineering surface was used to verify its properties in extraction of mean line and roughness and satisfactory results were obtained.
对一个实际工件进行测量提取表面中线和粗糙度，结果令人满意。
With the increase of the implantation voltage, the root-mean-square roughness (RMS) of Zr films almost don't change.
随着注入高压的增加，薄膜的表面粗糙度均方根（RMS）值的变化不大。
With the increase of the implantation voltage, the root-mean-square roughness (RMS) of Zr films almost don't change.
随着注入高压的增加，薄膜的表面粗糙度均方根（RMS）值的变化不大。
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