圆面积

那么，改变一下区域，把这块移到另一侧，我们得到对xdA的双重积分，是原点那的圆面积乘质心的x的坐标。

So , switching the area , moving the area to the other side , I 'll get double integral of xdA is the area of origin times the x coordinate of the center of mass .

本文采用代数法和应力圆面积法对Tresca和Mises屈服理论进行了简明的定量分析比较，其结论与文献[4]、[5]和[6]相同。

The yield criteria of the Tresca and Mises was compared using the algebraic method and method of stress-circle area . The result are the same with the literature [ 4 ] , [ 5 ] , [ 6 ] .

这样，有90%以上的光落在第二暗环所包围的圆面积之内。

Thus more than 90 per cent of the light is contained within the circle bounded by the second dark ring .

圆面积公式与圆周率究竟是怎样推求的

How to Calculate the Area of Circle and Ratio of the Circumference of to Its Diameter ITO formula of a function of

由于分类的依据是气泡表面积的大小，确定了圆面积和圆形度两个最能表征类圆形表面积的分量组成分类特征向量。

Area and circularity act as two elements of the eigenvector for they can remarkably characterize the surface area of the bubbles .

如果数据集较大，或者经常发出请求圆面积的查询，那么创建函数索引将有助于提高性能。

This is beneficial when the dataset is large and the frequency of queries that request the area of a circle is high .

统计典型区域中毛细管个数，参照圆面积公式得到纱线中毛细管当量半径。

According to the area of capillaries , the number of capillary and the formula of circle , the equivalent radius of the five kinds of the yarns was gotten .

这个公式用于计算圆的面积。

This formula is used to calculate the area of a circle .

接着，创建一个SPL函数，它将返回给定半径的圆的面积。

Next , create an SPL function that returns the area of a circle given its radius .

示例：对圆的面积执行函数索引

Example : Functional index on the area of a circle

这就等于一个单位圆的面积。

Well , it 's just the area of a unit circle .

我们能用半径计算出圆的面积。

We can compute the circular area with radius .

本示例展示如何对圆的面积创建函数索引。

This example shows how to create a functional index on the area of a circle .

下载这个拉丝金属质感，并选择椭圆选框工具，选择圆的面积。

Download this brushed metal texture and select Elliptical Marquee Tool to select the circle area .

一个一直没有得到解决的问题是，怎样“求圆的面积”。这个问题的真实意思是：求一个圆的精确面积。

One of the problems that has never been solved is that of " squaring the circle . " This really means to find the exact area of a circle .

在其余场合，误差圆的面积为最大，而误差椭圆面积为四边形的96.8%～99.2%。

In other conditions , the area of error circle is maximum , and the area of error ellipse is 96 8 % ~ 99 2 % of error parallelogram .

分析了覆盖船位的概率相等的误差四边形、椭圆和圆的面积大小问题，并得到结论：（1）误差椭圆的面积为最小；

This paper discusses the problem of comparison between the area of error parallelogram , ellipse and circle in the same probability covered position , and comes to the conclusion : The area of error ellipse is minimum .

推广了经典的圆内接三角形面积最大值问题。

Classical maximum area of inscribed triangle is extended in this paper .

圆的等面积逼近和生成

An algorithm in approximating and generating a circle

圆度评定的面积法

Area Method of Roundness Evaluation

方法用计算机图象分析系统得到阴道毛滴虫及核的长、宽、周长、长宽比、等效圆直径、圆度、面积、前鞭毛与后鞭毛、轴柱长度。

Methods The length , breadth , perimeter , aspect ratio , equivalent circle diameter , roundness and area of T. vaginalis trophozoites and their nuclei , and the lengths of axostyle , anterior and recurrent flagellum were measured by computer image analysis system .

同时，研究了间隙圆所组成的平面多圆的面积算法以及平面多圆包络面积算法，为塔窗设计最小面积和优化尺寸提供了依据。

At the same time , the study of space , which comprises a round flat area of more than a round of the algorithm , as well as more than a round flat envelope area algorithm for the minimum size of a tower window design provides a basis .

进一步熟记圆的概念，区分圆的周长和面积。

To further understand the concept of a circle , distinguish the perimeter and the area of a circle .