小圆

The details as follow: 1.Based on rules about form error in GB, mathematical models of form error are established including straightness error on the base of minimizing zone method、least-squares method and two dots linked method ; flatness error based on minimizing zone method、lease-squares method、diagonal line and three dots method; circularity and cylindricity error based on minimizing zone method、lease-squares method、minimum circumscribed circle and maximum inscribed circle.

具体内容如下：根据国标中形状误差的相关规定建立了各种要素评定方法的数学模型包括：直线度的最小区域法、最小二乘法、两端点连线法；平面度的最小二乘法、最小区域法、对角线法、三远点法；圆度和圆柱度的最小区域法、最小二乘法、最小外接圆法、最大内切圆法。

Both the a-axis and ab-plane dip towards the downstream , the dip angles of the a-axis are low and concentrated, being 7—8°,the ab-plane dips at 7～21°, and the a-axis has more preferred dip of fabrics than the ab-plane; the peak of the grain-size frequency distribution curve of deposits in the Lushan area is in the range of 4 and 5 φ;The quartz sand grains are subangular and have well-developed conchoidal fractures, parallel striatio ns, upturned cleavage flakes,"V"-shaped holes and siliceous deposits.

摘 要：庐山第四纪泥砾沉积物的砾石组构特征表明，砾石岩性与山体基岩基本一致，砾石的等体积球径较小，加权平均砾径较中值砾径大，分选系数大于1，分选性差，φ值相对较小，平均为0.66，F值相对较大，在2左右，F/φ比值介于2.75～4.75，ρ值集中且较小，为22.75%～37.75%，砾石以棱角、次棱角状为主，磨圆较差；a轴和ab面都倾向沟谷下游，a轴倾角集中且较小，为7～8°，ab面倾角为7～21°，a轴较ab面具有更为优势的组构倾向；沉积物粒度频率曲线在4～5Φ范围内表现为峰；石英砂颗粒为次棱角状，贝壳状断口发育，具平行擦痕、上翻解理片、V形坑和硅质沉淀。

Based on the mechanical analysis of rotary pan, the axisymmetrical model and non-axisymmetrical one were proposed respectively by simplifying the effect of lacing wires on pan into ring distribution uniform load or force and were solved according to the flexure theory of thin plate with small deflection.

在分析工作状态下转子圆盘受力的基础上，将拉筋对圆盘的作用分别简化成环形均布载荷和集中载荷，建立承压圆盘的轴对称模型和非轴对称模型，并根据薄板的小挠度弯曲理论，对力学模型进行求解。

A fast and accurate arithmetic method by the judgement standard of using the maximum inscribed circle for evaluating the errors ofroundness is introduced, and a program to evaluate of the errors of the circle roundness is designed in this paper.

介绍了利用最大内接圆判别准则快速精确求解圆度误差的基本思想，设计了用最小外接圆法评定圆度误差的程序设计技术。

Cuting the circle with the parallel plane pencil =+ of equidistant, we get discrete point dates s and the value of the corresponding plane .

用平行于的等距平行平面=+截该圆截线，进而得到一组圆截线上的离散点数据以及可以与圆截线相截的对应平面的值，记其最大与最小值为。

Inscribed polygons are used to approximate a circle, and the number of line segments compose the polygon is detemined by the radius and its image of a circle. Calculation of rotation angles between circle and world coordinate systems with normal vector of circles is also discussed. The proposed approach is tested with several real image data, and results are very satisfying.

讨论了利用空间圆所在平面的法向向量计算空间圆局部坐标系相对于物方坐标系的两个旋转角的方法，系统论述了基于物方直接解和直线段最小二乘模板匹配方法进行空间圆匹配与重建的数学模型，并利用实际图像数据进行了重建实验，取得了较好的重建结果。

The annulus model captures the key features of rotating convection in full spherical geometry and has been widely employed to study convection, magnetoconvection and dynamos in planetary systems, usually in connection with the small-gap approximation neglecting the effect of azimuthal curvature of the annulus.

圆环模型被广泛用来研究行星系统的对流，磁对流和发电机。通常在这些研究中用到了小间隙的近似，忽略了圆环的环向曲率效应。我们这一工作用数值模拟方法解完全的非线性对流方程组来研究有限间隙的旋转圆环中的非线性对流。

Graceful and lithe breed of terrier known for its uniquely tassled and outward curving ears and for its lamblike face and body; coat is crisp, curly, and short and can be white, blue, tan, sandy, or liver in color; long ears are triangular with rounded balls at tips, and they hang down the side of the head, sometimes ending in an outward curl; tail is ratlike; eyes are round, small, and very dark; adult stands 15 18 in.(38 46 cm) tall at shoulders and weighs 17 23 lbs (8 10 kg); originally known as the Rothbury terrier; developed in Northumberland, England, in late 1700s or early 1800s as a game terrier by miners and nailmakers, who used this breed to catch badgers, foxes, otters, and vermin; hunts using its keen eyesight; later adopted as a good house companion by the upper classes; lively, tireless, and dutiful demeanor; considered a kind-hearted and devoted companion

贝德灵顿厚毛犬属于优美的，柔软的小猎犬品种，以其独一无二的往外突出的小杯般的耳朵以及小羊羔般的脸蛋和身体而闻名；皮毛整洁干净，卷而短，有白色，蓝色，黄褐色，淡茶色，肝红色；长长的耳朵呈三角型在尖端有小球围绕，挂在头部的两边，有时候以外凸的卷曲的皮毛为结尾；尾巴颇似老鼠尾巴；眼睛圆而笑，非常暗淡；成年站立肩高38—46公分，体重8—10公斤；贝德灵顿厚毛犬源于Rothbury小猎犬；发展于诺森伯兰郡，在18世纪末期，19世纪初期主要作为矿工和制针业者的一种娱乐小猎犬，它被用来捕捉浣熊，狐狸，水獭和害虫，有着锐利的视野；之后作为一种很好家庭伴侣犬被上层社会接纳，恭敬顺从不知疲倦的举止；被认为是一种乐于奉献的伴侣。

RESULTS: On day 2 after PH, oval cells began to proliferate around the portal area, and matrilin-2 deposition was observed in the hepatic sinusoids in the periportal area. On day 9, proliferating oval cells were present in the hepatic acini, and matrilin-2 upregulation was noted. On day 12, as oval cells differentiated to form hepatocellular nodules, matrilin-2 was distributed mainly in the periphery of the nodules, and little protein was present in the nodules.

结果： 肝脏部分切除术(partial hepatectomy， PH)后第2天，卵圆细胞开始向门静脉周围区域增殖， Matrilin-2主要出现在门静脉周围的肝窦状隙内；术后第9天，卵圆细胞进一步向肝实质内增殖， Matrilin-2表达增加；术后第12天，随着卵圆细胞分化为小肝细胞结节，大多数Matrilin-2位于结节周边，少数出现在结节内。

Screws, bolts, or nuts without washers must be loaded against a test plate with a minimum diameter clearance hole equal to the nominal thread size plus 0.50mm for fasteners M6 (1/4 inch) and smaller, and plus 1.0mm for larger diameters.

无垫圈的螺钉、螺栓、或螺母应被装夹到具有较小孔径的通孔的试验圆板上进行试验，对于≤M6 (1/4 inch)的紧固件，试验圆板的孔径为公称螺纹直径加上0.50mm，对于＞M6 (1/4 inch)的紧固件，试验圆板的孔径为公称螺纹直径加上1.0mm 。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。