同心圆

It is forming a circle of love that gathers in the whole family.

是你们形成的爱的同心圆，温暖着家庭的所有成员。

Mar. 2004 General Editor, English and American Literature

Jan。 2002-《同心圆：文学与文化研究》编辑顾问

Experiment with the scaling percentage and colors to get a new kind of circle.

创建一个新图层，创建一个新的同心圆，然后填充些新的颜色。

The first part is preface, on the basis of expounding the background, the purpose, the meaning and the thinking of the thesis study, briefly introduce the research achievements of domestic and international urban spatial structure; the second part is summary, expatiate on the connotation, component, research span and space type of urban spatial structure; The third part is theory foundation, mainly introduce the three classical models of city spatial structure in the west country (concentric circles mode, fan-shaped mode and multi-core mode) and the relative city development theories (growth pole theory, dot-axis theory, core-fringe theory, metropolis circle theory and city space evolution theory); The fourth part is general situations of study region; The fifth part is the analysis of Lanzhou city spatial structure evolution, along the historical venation Of city development, on the basis of analyzing industrial structure change, focus on and sumup the characteristics of spatial development and form, meanwhile, analyze factors which influences the spatial development; The sixth part is the analysis of Lanzhou city spatial development trend, put forward the development models of Lanzhou city spatial structure from three space aspects(the core city, the city, region) in the future, they are group gobbet structure, fingers structure, circle structure; The seventh part is to mainly put forward the development strategies for the different spatial structure models.

第一部分为前言，在阐明论文研究背景、目的及意义、思路的基础上，简要介绍了国内外城市空间结构相关研究成果；第二部分为概述，对城市空间结构的内涵、组成要素、研究尺度及其空间类型作以介绍；第三部分为理论基础，主要是对西方城市空间结构的3大经典模型(同心圆模式、扇形模式和多核心模式)以及与本研究相关的城市空间发展理论(增长极理论、点轴理论、核心——边缘理论、都市圈理论和城市空间演化理论)的介绍；第四部分为研究区概况，主要是对研究区域范围的界定及其社会经济发展概况介绍；第五部分是兰州城市空间结构演化分析，顺着兰州城市发展的历史脉络，在分析产业结构变动的基础上，着重对城市空间发展及其形态特征进行归纳总结，并分析了空间发展的主要影响因素；第六部分是兰州城市空间发展趋势分析，从中心城市、市域、区域3个空间层面上提出未来兰州城市空间结构的不同模式，即组团结构、指状结构、圈层结构；第七部分是城市空间发展策略，针对不同的城市空间发展模式提出一些对策建议。

According to the fact that a round of all the points must be inscribed circle round, the black and white points of the edge image were extracted, and a twodimensional array accumulator was established.

根据圆上所有点的内切圆必经过圆中心的事实，提取黑白边缘图像来建立二维数组累加器，依照像素点分布扫描边缘图像，累加器计数，计算出圆心位置，对每个圆心进行半径累积，确定同心圆半径集。

In order to control the flow separation by reducing the diffusion factor and enlarging the diameter of inner circle, the meridian plane profile of the return channel was redesigned, which is achieved by substituting arbitrary curve for the circle with no change of the axial length of the stage. Bezier curve with eight parameters was chose to describe the shape of meridian plane profile, and the optimization of the meridian plane profile was implemented combining back-propagation neural network with genetic algorithm.

改进的主要思路是减小弯道前半部分通道的扩压度，并同时加大弯道出口内侧的转弯半径，主要做法是在不增加整级轴向尺寸的前提下，用任意曲线取代传统弯道的同心圆环结构，给定弯道回流器子午型线的外侧型线，采用Bezier曲线对内侧型线的2段曲线进行参数化描述，利用遗传算法和反向传播(back-propagation，BP)神经网络相结合的方法对内侧型线进行优化，得到新的弯道回流器子午型线。

Land use degree of Guangzhou City is highly positive global spatial autocorrelated. The spatial autocorrelation types of Guangzhou City land use degree is distributed in a centric circle. High-high aggregation is in the central part and low-low aggregation is in the peripheral area. Non-aggregation and Sparse low-high and high-low aggregation are in the intermediate area. Decrease of Moran's I since 1995 shows the weakening of the single-center structure of land use degree.

广州市土地利用程度呈高度的正全局空间自相关，各局部空间自相关类型呈同心圆分布，中间为高高集聚，外围为低低集聚，两者之间为非集聚和零散的高低、低高集聚，呈现出单中心结构。1995年以后， Moran's I 有所下降，说明这种单中心结构在弱化。

We know that the hard surface of each disc to rotation axis as the axis, the magnetic density of a certain number of intervals was divided into concentric tracks, each track was divided into a number of sectors, the data are in accordance with stored in the hard disk sector.

我们知道，硬盘盘片的每一面上，以转动轴为轴心、以一定的磁密度为间隔的若干同心圆就被划分成磁道，每个磁道又被划分为若干个扇区，数据就按扇区存放在硬盘上。

Besides the bull's-eye, the target is comprised of nine concentric rings, and the outer ring is worth one point.

靶除了靶心外，还有9个同心圆。射中最外面的一圈得1分。

In part two, the optical spatiotemporal pattern in ring optic cavity is investigated. Using delay feedback with spatial perturbation method, the system shows roll, square, hexagon, homocentric circle,"honeycomb"and"snowflower" pattern with different spatial perturbation functions. Different patterns can be coexist and compete each other with the same perturbation function, which is the new character of this optical system with delay feedback.

第二部分，利用延时反馈的空间微扰方法研究了环形腔中二能级介质的光学时空斑图的控制，在不同的微扰函数作用下，出现了滚筒状、四方形、六角形、蜂窝状、同心圆以及"雪花"状等不同的斑图，并且在相同的微扰函数下出现了不同斑图之间的竞争，这种竞争是我们发现的这一具有空间微扰的延时反馈非线性光学系统光学斑图的新特征。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。