直径的

My college life will be over soon. Just as my father said, I was lucky enough as my former 21-year life was a diametrical life. But no one will be so lucky in his or her whole lifetime, and what I should do is to cherish this opportunity God has given me and further my education in materials science.

大学的生活即将结束，就像父亲说的那样我前面21年的生活是直径的人生，没有遇到过任何的曲折，这是我的幸运，但是人的一生不可能永远是直径的，我应该做的是好好珍惜上天给予我的这样的机遇，继续在我所深爱的物理领域进行深造。

To make the constant in the interpolation error independent of element size,the ratio of the diameter of the element and the diameter of the biggest ball contained in the element,is uniformly bounded.

传统的有限元方法误差估计需要满足正则性条件或非退化条件，即：单元的直径和单元的最大内切圆直径的比值是一致有界的。

We study the recursive structure of the twisted-cube connected network sufficiently, and prove that the twisted-cube connected network is an n regular graph with connectivity n: point out that the twisted-cube connected network is a cube-free network, which is an essential distinction with the hypercube and other variations of the hypercube; prove that the diameter of n dimensional twisted-cube connected network is [ (n+1)/2] , which is almost the half of hypercube's.

首先对其结构的递归性进行充分地研究，证明它是连通度为n的n正则图；指出扭立方体连接网络无立方体子图，这是扭立方体连接网络与超立方体及其其它变种的本质差别；证明了n维扭立方体连接网络的直径为[（n+1）/2]，它几乎是超立方体直径的一半；最后，给出超立方体及其变种的等价定义，并对它们的结构递归性、网络参数和拓扑性质等作了简单的分析、综合和比较。

Firstly, we normalized the basic voxel by constructing its minimum oriented bounding box. Secondly, we constructed its D2 shape distribution curve, and computed the values of EMD(earth mover's distance) compared with the corresponding curves of the normal cone and cylinder respectively, and the corresponding top diameters. Finally, we compared the top diameters and obtained the parameters by the bounding box.

首先建立基本体素的MOBB，对体素进行标准化；然后生成其D2形状分布曲线，计算此曲线分别与标准圆锥体形状分布曲线、标准圆柱体形状分布曲线的EMD(earth mover's distance)值以及相应的上底直径；最后通过比较两个上底直径的大小来判断此体素是否为圆台体，并由包围盒的边长给出圆台体的参数。

Under the same situation as steel tube ratio and volumetric percentage of stirrups and so on, yield load and increases with the increasing of reinforced bar-diameter. But the variety of reinforced bar-diameter has ruleless to limited load and ductibility.

4在含钢率、配箍率等其他属性相同的情况下，屈服荷载随着钢筋直径的增大而增大，但钢筋直径的改变对极限荷载和柱的延性的改变不具有规律性。

In this paper, new approaches were attempted to improve the accuracy in the measurements of both tree ring width and the sectional area of bark.

利用校正系数对传统方法测定的结果进行校正，或者在直径测定时采用符合实际直径的方位；对于有裂隙的树皮（假设内皮厚度为0）的断面积，把目前的去皮半径当作带皮半径进行计算，而不是带皮断面积和去皮断面积之差。

Therefore liquid CO_2 avoids gas-solid multiphase flow, and supplies continuous low temperature gas for cryoprobe. Experimental results show that the 2-dimension temperature distribution for the first time, it includes:(1) The cooling velocity and freezing zone increases along the flux up at certain size of the cryoprobe in the same biological tissue.(2) As the diameter of cryoprobe increases, the temperature will descend faster, freezing zone will be broader obviously, and ice ball become larger. Until it arrives heat balance, the temperature keeps invariability.(3) Single freezing-thaw results in biggish mechanical injury already for loosen tissue such as pork liver; Successive freeze-thaw circle could quicken freezing and thaw velocity for compact tissue, and it has proved the more mechanical injury of successive freeze-thaw circle than the single freezing-thaw treatment.

文中首次对生物组织进行了二维温度场分布实验研究，得出：(1)当刀头大小一定，对同一组织冷冻时，流量越大，降温速度越快，降温影响区域越大；(2)随着冷刀直径的增加，降温速度随着增加；温度影响区域明显增大；冰球直径也随着增大，热量平衡后温度几乎不随时间变化；(3)对于结构疏松组织比如猪肺脏，单次冻融对组织已造成较大的机械破损；对于结构较致密组织，多次反复冻融可以使降温和复温速率增加，单次冻融的热应力造成的机械破损较小，多次冻融后造成的机械破损比单次冻融所造成的机械破损大；(4)直喷式刀头比导热式节能约15％。

Light from a large core multi-mode fiber is launched onto the curved surface of plano-side-silvered plano-convex lens.The reflected light is recovered by small core multi-mode fibers and serves as the means for determining the displacenient of tilt.

从一个大直径多模光纤中发射出的光，入射到一个由平凸透镜和平面镜组成的系统的曲面上，光经反射后，被小直径的多模光纤收集，经处理后确定物体的位移和转动。

Blade tip diameter is selected to optimize the U/C for efficiency within the blade height-to- diameter performance limits and within the tip speed structural limits.

叶尖直径是选定的优化美国/ C的效率与叶片高度到直径的性能界限和尖端的速度结构的限制。

Experimental results show that: bearing capacity of JPP is thirty percent higher than that of cast-in-place pile which has the same length and diameter with JPP. The deformation of JPP is controlled by core pile; axial force distribution of PHC is different with soil-cement; and their axial force ratio in same section is their elastic modulus ratio. Distribution of inner and outer friction resistance is similar; and the inner friction is about 1.62 times of the outer one; it is about the ratio of JPP diameter and PHC diameter. Furthermore, the relation between friction resistance and relative displacement is similarly hyperbolic; and the relation between dip resistance and displacement is also hyperbolic.

试验结果表明，JPP桩与同桩长、同桩经灌注桩相比承载力高30%以上；JPP桩变形由芯桩控制，管桩轴力分布与水泥土轴力分布规律不一致，但同一截面上管桩和水泥土的轴力比值约为其弹性模量的比值；内外摩阻沿桩身的分布规律类似，内摩阻是外摩阻的1.62倍左右，约为JPP桩直径和管桩直径的比值；桩侧摩阻力与桩土相对位移近似双曲线分布，桩端阻力和桩端位移也近似双曲线分布。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。