子午线的

This paper reported a new method using tangential curvature to establish a mathematical model of the anterior cornea and an analysis of the regularity of the distribution of the asphericity Q. The curvature in the horizontal meridians is a prolate ellipse. The curvature in the vertical meridians is an oblate ellipse. The curvature of the horizontal meridians is important for anterior corneal asphericity.

本研究分析了运用正切曲率半径值建立人眼前表面角膜数学模型的科学性，显示角膜前表面水平子午线方向非球面性趋向于长椭圆，垂直子午线方向非球面性趋向于扁椭圆，说明人眼角膜的非球面性特性主要由水平子午线实现。

We can think of spherocylinders as a flat sphere and a flat cylinder glued together. They have power meridians of maximum and minimum , called primary merdians.

6可以想象，球柱面透镜有如一个平球面透镜和一个平圆柱透镜黏结在一起，具有最高和最低焦度的子午线，称为主子午线。

The FEA for the temperature field in radial tire structure is described,the temperature field distribution in 9 00R20 tire under certain conditions is analysed with the FEA method and the temperature profile and curve of the tire structure are given.

介绍了子午线轮胎结构温度场的有限元分析方法，并分析了 9 0 0R2 0子午线轮胎在特定条件下的温度场分布，给出了轮胎温度场分布图和温度分布曲线。

Distributions of corneal curvature With the formula 〓 Sin〓αwhich is about the curvatures of oblique meridians on toric surface, the theoretical values of anterior, posterior and total corneal radius of curvature of the oblique meridians were obtained.

3角膜曲率分布根据托力克面斜轴子午线曲率F'计算公式〓，确定角膜前、后表面斜轴子午线曲率及斜轴子午线总角膜曲率的理论值，并通过分析该理论值与实测值之间的一致性，明确角膜曲率分布特征。

The characteristics of meridian tyre are high speed, saving oil and wearability.

影响子午线轮胎发展的因素2 0 0 1年国家免征子午线轮胎消费税后，子午线轮胎的发展速度加快。

The ocular accommodation has a great influence on refractive components. It is not only the process by which the refractive power of the lens is increased. But the lens itself moved forward relatively. The accumulation effects of accommodation induced by near-work is the main cause of myopia developed in children. The asymmetry of corneal surface was not only related to keratometer K1 and K2 , even the curvature within the same horizontal or vertical meridian was asymmetry.

调节本身不仅是传统意义上的睫状肌收缩和晶状体变凸，同时还伴有晶状体的相对前移；调节对眼的几乎所有屈光构成因素有着显著的影响，视近活动的累积效应是儿童近视眼发生的主要原因；角膜的非球面性不但表现为两个相互垂直子午线的曲率不等，即便是在同一垂直或水平径线上的屈光分布也是非对称的。

Methods Keratometric reading with Topcon KR-8100 automatic keratometry and comeal topography with the TMS-4 on 53 ametropia' children, 106 eyes were compared. Difference in measurements of steep meridian power magnitude Ks, flat meridian power magnitude Kf, astigmatism magnitude Ks-Kf and location as well between the two methods were assessed using paired t test.Bland-Altmann method was used to evaluate the agreement of the two methods.

采用KR-8100自动角膜曲率计及TMS-4角膜地形图仪对53例（106只眼）屈光不正儿童进行测量，应用配对t检验对两种方法测量的陡峭子午线角膜屈光力、平坦子午线角膜屈光力、角膜散光Ks-Kf大小及轴向进行比较，并应用Bland-Altmann分析对两种测量方法进行一致性评价。

A prime meridian name and offset from Greenwich.

一个0度经线的名车以及它于本初子午线的偏离程度。

The prime meridian is used as a reference line from which longitude east and west is measured.

本初子午线通过英国格林威治的零度子午线，用作参考经线，从本初子午线开始分别向东和向西计算全世界的地理经度

The cross cylinderis a compound lens having a net minus power in one principal meridian and an equal net plus power in the other.

12交叉圆柱透镜(Jackson 交叉柱镜)是一组复合式镜片，一条主子午线上有单纯负圆柱透镜焦度，在另一主子午线上有一相等的单纯正圆柱透镜焦度

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。