点弧

The faces of turbine blade s body is complex,in the general CAD platform,fitting spline of intrados and convex based on points of data,creating fillet of leading edge and trailing edge,and achieving the body of turbine blade at last are all complicated processes.

汽轮机叶片叶身型面比较复杂，在通用CAD系统中，根据数据点拟合出内、背弧样条曲线，修进出汽边圆角，最后根据每个截面形状得到叶身实体，都是比较复杂的过程。

The curvature radius was derivated and the contact stress of the three-arc-sect isometric type surface was calculated through the elastic dynamics theory.

应用弹性力学理论，推导出接触点的曲率半径，对三弧段等距型面联接进行接触应力计算。

First,the center spine profile and the boundary profile were designed according to the normal trend of lumbar curvature and the position of shoulder rest and lumbar rest.

首先在保证腰弧曲线的正常形状和保证肩靠与腰靠的正常高度与宽度的前提下，设计了骨架靠背的中心脊线轮廓和边界轮廓线；利用中心脊线和边界线上取等比例点并构造样条线的方法，设计了横向断面线。

The calculated results showed that assessment points were under the curve and assessment results showed that the penstock's crater defects were safety.

计算结果表明，评定点落在曲线定义的范围内。评定结果表明，压力钢管含有该范围内的弧坑缺陷是允许的。

To get these times, one must correct for the semidiameter of the sun and for atmospheric refraction.

另一种较常见的定义，日出和日落时，上肢的太阳显然超越地平线上，要得到这些时间，我们必须正确的，为semidiameter的太阳和大气折射（这些效应，共计约50分钟的弧）要做到这一点，添加以下的地方，你看到红点。

On the basis of the model, the friction force in each meshing point on the spiral bevel gear surface covered by silver film is presented by numerical method. In addition, the result is indirectly proved by experiment.

用数值法求解了弧齿锥齿轮镀银齿面之间各啮合点处的摩擦系数；以试验方法对数学模型的正确性进行了间接验证；通过详尽的数值计算探讨了银层厚度、刀盘直径、基体硬度等参数对摩擦系数的影响。

Theory; the spatial meshing theory includes comparative motion, comparative differential and conjugative curved surface; and the application of meshing theory includes gear drive and worm drive. The spatial meshing theory is the main part of the course.

课程的重点讲解内容有曲线的参数方程、切线、法面、弧长、曲率、空间曲线的基本公式、挠率及平面曲线的基本公式等；曲面第一和第二基本公式，法曲率、主方向和主曲率、欧拉公式、短程挠率、欧拉公式和贝特朗公式推广、相对法曲率和相对短程挠率等；刚体的绝对和相对运动速度、相对微分和绝对微分、相对速度和相对微分、轨迹曲面的法曲率和短程挠率等；空间共轭曲面的啮合条件、诱导法曲率、两类界限点、等距共轭曲面、空间啮合的二次接触原理等；蜗杆传动的数学模型建立及啮合特性分析方法等。

Analysis and fitting of growth curves in Liyang chicken;2. The results of antibacterial spectra and growth curves of eleven strains with better antagonistic effect showed that: 4 strains isolated from NAC plate had wider range of antibacterial spectra,3 strains isolated from manganic nutrient agar plate had advantage on growth.

用点种法从大黄鱼肠道优势菌群中筛选出104株病原性副溶血弧菌的拮抗菌，进一步研究拮抗效果最好的11株拮抗菌的抗菌谱和生长曲线，其中NAC平板上筛选的4株拮抗菌的抗菌范围较广，锰营养琼脂培养基上筛选的3株拮抗菌具有生长优势。

The situations of outside and inner arc belt were influenced by height of tree and the height below branch respectively. In the area of 1.0×H and 0.6×H, transmittancy was below 90%, which meant umbrage hazard effect happened in this area. Additionally, the effect was stronger at bottom of the tree.

试验区树荫运动轨迹呈蝶形弧带变化，树高影响投影外弧线位置，枝下高影响投影内弧线位置；在树体东、西侧1倍树高、北侧0.6倍树高范围内，透光率小于90%，在该区域发生林木遮荫胁地效应，距树底点较近区域的胁地效应较强。

There are no additional contacts or other components for the disconnecting function in the SF6 breaking chamber.

在这个SF6 熄弧室中，并没有额外的触点或其他具有隔离功能的器件。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。