对圆的

The study establishes the compression of models and algorithms for vector graphics data on different basis, including on the basis of vector graphic factors of B spline curves in predecessors research; on the basis of rectangle graphic factors in main axis mode; on the basis of the application of Hough transform to polygonal line, ellipse and circle, so the study improves the models and algorithms of compression for vector graphic data.The compression for vector graphic data mainly studies the data of storing graphic factors.

本文研究的内容是：根据对以往各种曲线矢量数据压缩模型与算法的研究，建立了基于B样条的曲线矢量图形要素的数据压缩模型和算法；在前人研究的基础上，建立基于主轴模式的矩形图形要素的数据压缩模型和算法；本文作者将Hough变换应用到折线、圆及椭圆图形要素的矢量数据压缩上，在此基础上改进了基于Hough变换的折线、圆及椭圆图形要素的数据压缩模型和算法。

Firstly, the condensation heat transfer of steam-air mixture on the outside of a horizontal smooth tube and four square thread tubes is studied experimentally, and then, the condensation heat transfer on axisymmetrical surfaces as well as vertical plates of any kind of vapors containing noncondensable gases is analyzed theoretically.

本文作者先实验研究含空气的水蒸汽管外冷凝时水平光滑圆管和强化换热圆管的传热特性，实验时控制主流混合气体的压力和空气的质量成分，并探讨建立实验关联式的方法；然后对含不凝气体的蒸气在竖直平板和轴对称壁面上冷凝换热进行理论分析。

In order to guarantee safety and stability, and to minimize costs for repair and maintenance, it is desirable to make a suitable rule determining the range of out-of-round, and to detect、remove and repair the non-roundness wheels in time. The paper analyzes wheel ovalization, which is called the second order periodic non-roundness of wheels.

为保证此方面的行车安全和稳定，提高铁路运输维护维修的经济效益，需要制定合理的依据，确定车轮非圆化的允许范围，及时对非圆化车轮进行检测、更换和镟修。

Considering the bud of Platycarya longipesas basic unit of modular population,the bud population structure of sample trees, which were 8-12 years old and located at different places on slope in karst area in the middle of Guizhou province, was studied.

以圆果化香植株的芽为基本构件单元，对贵州中部喀斯特山地不同坡位上8-12年生植株的芽种群结构进行研究，结果表明：圆果化香芽种群芽总量分配随枝级发生变化，芽数量最多的枝级为树冠中间部位的二级或三级枝，树冠表层的末生枝和紧靠树干的一级枝芽数量较少。

Based on the analysis of the experimental results of flue gas temperature distribution in horizontal flue in a 300MW pulverized coal tangentially fired boiler at variable load, the characteristics of the flue gas temperature distribution in horizontal flue of this boiler at variable load are summarized in this paper.

通过对某 3 0 0 MW四角布置切圆燃烧锅炉在变负荷工况下水平烟道内烟温分布的现场试验结果的分析，指出了四角布置切圆燃烧锅炉水平烟道内烟温分布的特点及其随负荷变化的规律。

Objective:The aim of the experiment is to search for the regulation that the hepatic stem cells abnormally differentiate into cancer cells. In the experiment,the variating regulation of PCNA,c-kit and c-myc in the formation and development of HCC will be interpreted with immunohistochemistry and RT-PCR. So,the initial mechanism that hepatic stem cells abnormally differentiate into cancer cells from the levels of cell,protein and gene will be clarified. The last,the inhibition to HCC with ulinastain will be studied,from which,a new way of clinical prevention and treatment for HCC will expect to be explored.

二、目的本实验旨在探讨以卵圆细胞为代表的肝干细胞在HCC发生、发展过程中在肝组织内分布规律，并通过免疫组化、RT-PCR等技术阐明PCNA、c-kit、c-myc在HCC发生、发展过程中的动态演变规律，从细胞、蛋白、基因三个水平初步研究卵圆细胞向癌细胞异常分化的机制，同时观察乌司他丁对HCC发生、发展的抑制作用，为肝癌的临床预防和治疗探索新的途径。

By careful study to the deflection response of a hinged-fixed circular plate u nder concentrated impulse loading,the saturated impulse phenomenon in the proces s of response is discussed.

利用有限变形弹塑性连续体的最小加速度原理，建立了分析圆板动力响应问题的数值方法，并通过对均匀分布的脉冲载荷作用下铰支圆板位移响应的细致分析，探讨了响应过程中的饱和冲量现象，指出对于高载范围内的脉冲载荷，相应于最大变形的饱和冲量确实是存在的。

Using experimental method, the effects of different laser energy, different shock times and shock paths on TA2 round sheet forming were analyzed by the aid of a neodymium glass laser with pulse energy 35J, FWHM 23ns, laser wavelength 1.06 μm, effective spot diameter 8mm, pulse repetitious rate 2Hz.

采用实验的方法，研究了不同的激光能量和不同的冲击路径、冲击次数对TA2钛合金圆板变形的影响，取得了不同冲击条件下钛合金圆板的变形数据。

Following the theory of slip line field , the area is divided into five sections and the distributing situation of the slip line in each section is analysed.

通过对方盒形件塑性变形过程的分析及变形区域内的变形应力分析，采用滑移线场理论的分析方法，把变形区划分为Ⅰ～Ⅴ区域并分析了这些区域的滑移线分布情况，导出了对数螺线的基圆半径和基圆中心位置及力学模型，为方盒形件的毛坯尺寸的确定提供了依据。

The shapes of the suspended ring in the present work are also designed to self-center the lens liquid, then influences of different shapes of the suspended rings on the variation of optical power of the meniscus are discussed.

悬浮的金属圆环同时被用来使透镜中的水滴自居中，讨论了具有自居中效应的不同悬浮圆环形状对弯月面光学功率变化范围的影响。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。