粗糙的

In view of the existing problems of traditional resource allocating networks, a design method for RAN based on rough set and orthogonal least square was proposed. Firstly, rough set was applied to intelligent data analysis for extracting typical characteristics from the training samples, and then OLS was used to select best renters as the hidden layer nodes.

针对常用的资源分配网络存在的问题，提出了一种基于粗糙集和正交最小二乘的资源分配网络设计方法，通过粗糙集数据分析与处理提取训练样本中典型的数据特征，再结合正交最小二乘学习算法选取对输出能量贡献最大的数据中心加入到隐层节点。

Decreasing the parts' surface roughness, as it is shown after a long time practice that can realize the reliability and stabilization of the match; can reduce faction coefficient, wear, stress concentration, vibration, noises, and power consumption; can improve the operative precision and perceptivity; can increase the support area and contact intensity; and also can improve wear degree etc.

长期的生产实践表明，降低零件的表面粗糙度，对保证配合的可靠性和稳定性；对减少摩擦系数，降低动力消耗；对提高机械和仪器的工作精度和灵敏度；对增大支撑面积，减少磨损，提高接触刚度；对减少应力集中，增加耐疲劳强度，减少振动和噪声等均起着重要的作用：即表面粗糙度直接影响着机械和仪器的使用性能和使用寿命。

However, in the algebraic representation of this theory, it is difficult to understand the essence of rough set theory, and efficient algorithm of knowledge reduction has not been found.

该文首先建立了知识与信息之间的关系；然后，在此基础上给出了粗糙集理论中概念与运算的信息表示；最后，证明了知识约简在信息和代数两种不同表示下是等价的。这些结论有助于人们深刻理解粗糙集理论的本质，同时，为寻找高效的知识约简算法奠定了基础

To study the surface hydrophobicity of solid materials with the lattice Boltzmann method , the rough surface is approximately treated with simple periodic rectangular, saw-toothed and semicircular protrusions structure respectively. A two-phase lattice Boltzmann model is used to simulate the changes of surface hydrophobicity by calculating the contact angles of a droplet on rough surfaces.

将固体表面分别近似为具有简单的周期性矩形、三角形和半圆形微粗糙结构表面，建立两相流的晶格玻尔兹曼模型，通过测量不同微粗糙结构表面上液滴的接触角，探讨微结构形状和尺寸的改变对固体材料表面疏水性能的影响。

According to the request of construction features, processing spot, size precision, surface roughness and productivity that diesel engine air cylinder, sets the machine tool for single location horizontal type modular machine tool. Considered to the factor of the size precision, surface roughness, scrap removes and productivity and so on of the work piece, selects the Hard alloy not grind type surface milling cutter.

根据柴油机气缸体的结构特点、加工部位、尺寸精度、表面粗糙度及生产率等要求，确定该机床为单工位卧式组合机床；考虑工件尺寸精度，表面粗糙度，切屑的排除及生产率等因素，选用硬质合金不重磨式面铣刀；根据工件的尺寸、特点及其材料选择切削用量；然后，再经过切削用量来确定组合机床的通用部件；最后进行组合机床的总体设计。

Surface roughness and geometry topography have very obvious difference between ordinary and ultraprecision grindings. Surface roughness of ultrapreciscon grinding will decrease with abrasive size and grinding depth decrease, surface veining owing to plastic deformation is very clear.

超精密磨削和普通磨削的表面粗糙度和几何形貌存在明显的差异，超精密磨削的表面粗糙度随着金刚石砂轮磨粒尺寸和磨削深度的减小而减小，表面由于塑性变形形成的纹理比较明显。

Pawlak based on indiscernibility only can deal with discrete attribute value, so how to discretize continuous data becomes the bottleneck of using rough set theory.

Pawlak提出的以不可分辨关系为核心的粗糙集方法处理的是离散属性值，而实际生活中的数据大多数是连续的属性值，因此需要首先对数据进行离散化处理，这已成为粗糙集理论实用性的瓶颈。

Firstly,proposed an extended rough sets model based on concordance relation which relaxed the indiscernibility relation and tolerance relation.Secondly,redefined some concepts,such as the indiscernibility degree between two objects,the indiscernibility degree between two clusters,integrated approximation rate of the clustering result.

首先在经典粗糙集理论的基础上，通过松弛对象之间的不可分辨和相容性条件，得到了基于和谐关系的扩展粗糙集模型；然后定义了新的个体间不可区分度、类间不可区分度、聚类结果的综合近似精度等概念，提出了新的混合数据类型层次聚类算法。

The concept of strict value reduct is proposed, and an improved algorithm for computing value reducts is given. In Chapter 4, we study how to utilize Rough Set theory effectively for an information system with continuous attributes. At first, we propose an approach of discretizing attributes one by one.

本文在第一章对数据挖掘的基本问题和主要手段进行了简单综述，在第二章对粗糙集理论作了简要介绍后，在第三章中对粗糙集中的值约简进行了研究，提出了严格值约简的概念，使得值约简的过程可以在没有封闭世界假设的情况下也能进行，并提出了求值约简的改进方法。

The crocking resistance of coatings film is tested by use of adhesive tape, sticking off or peeling off of the marks painted with waterborne or solventborne marking pens.

结果发现表面粗糙度和表面助剂的共同作用可有效防止记号笔对涂层的粘结，粗糙表面的涂层亲水、亲油性对抗粘结作用有较大的影响，涂膜在水浸泡前后的抗粘性效果表现不同。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷