分形维数是描述图像粗糙程度的主要参数。
Fractal dimension is an important parameter to characterize roughness in an image.
基于粗糙集和神经网络的人脸识别方法是针对PC A方法中存在的高维数问题和它对未训练过的样本识别率低的缺点而提出的。
Face recognition based on rough set and neural network was proposed for the shortcoming of high dimension of PCA face recognition and low recognition rate for non-training samples.
它首先利用粗糙集理论对磨粒特征参数进行约简，这样能够大大减少了神经网络的输入维数。
At first, debris feature parameters are simplified based on rough sets theory, and the input information-dimensions is reduced.
针对流程工业数据的高维数、不确定的特点，研究适合处理流程数据的模糊集、粗糙集的粒度数据挖掘理论和方法。
According to the high dimensions and uncertainty of process industrial data, the fuzzy set and rough set of granularity data mining are studied for process data.
实验表明，将纹理图像的分形尺度与分形维数结合，既反映了物理表面分形的尺度范围又反映了该尺度范围内的纹理粗糙程度，从而更有效地描述和区分纹理特征。
Experiments indicate that the fractal scale, together with the fractal dimension can effectively reflect the fractal scale range of natural textures and the texture roughness within the scale range.
若流线型物体表面的摩擦阻力系数仅为相对粗糙度的函数，则形状阻力系数与雷诺数无关。
Since if the frictional resistance coefficient is a function of relative roughness, then the form resistance coefficient is independent of the Reynolds number.
模糊粗糙集理论是解决数据集维数问题的有效工具，但基于模糊粗糙集的降维算法还不多。
Fuzzy rough set theory is an effective tool for reduction of data dimension, but there are few dimension reduction algorithms that are based on fuzzy rough set theory so far.
通过在线监测磨削拳数。所提供的预测方法可以实现对工件表面粗糙度的在线预测。
By monitoring the grinding parameters, this proposed method can realize on-line prediction for the workpiece roughness.
分析了丝网目数、丝径等几何参数及网版的厚度、粗糙度对丝网印刷精度的影响；
The factors influencing screen printing precision were analyzed including mesh geometry parameters, the plate thickness, and the surface roughness.
本文介绍了来流马赫数5的条件下，典型球锥模型的粗糙壁热交换实验结果。
Experimental results of heat transfer to rough walls are given here for sphere cone models at Mach number 5.
形维数是描述图像粗糙程度的主要参数。
Fractal dimension is an important parameter to characterize roughness in an image.
最好的指甲锉刀是分级别的那种，有不同型号和粒度（甲锉上数字单位的面积颗粒数，表示甲锉的粗糙程度）。
Some eof the best nail files are professional grade files, available in different types or grits.
最好的指甲锉刀是分级别的那种，有不同型号和粒度（甲锉上数字单位的面积颗粒数，表示甲锉的粗糙程度）。
Some eof the best nail files are professional grade files, available in different types or grits.
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