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Considered the inside and outside contour line was Archimedes spiral in the cold rolling, the forming law of rectangular cross sectional rings has been studied. And the more precise geometrical models and calculation models have been gained. The researches can be used as a theoretical and experimental foundation for the simulation of ring rolling process. At the same time, the results of theoretical analysis have a good agreement with the results of practical rolling production.

本文在考虑冷轧过程中环件的内外轮廓线均为阿基米德螺线的情况下，对矩形截面环件的轧制成形规律进行了研究，得到了较精确的几何模型和计算模型，为环件轧制过程的模拟提供了理论依据和实验依据，同时理论分析的结果与实际轧制生产过程中的结果有较好的吻合。

In architectonics, the calculation of rectangular plate on elastic foundation, in common, is used by the finite element method and chart .

在建筑结构设计中的局部均布荷载作用下非均匀弹性地基上矩形板的计算一般采用有限元法和图表，在理论上很难获得一般性的解析解。

Through the comparison and analysis of four examples,this paper draws the common methods,procedures and thinking paths of using the definite integral in the calculation of the area of some planar graph s and the static pressure of the liquid.

通过4个例题的对比分析，得出定积分在计算一些平面图形面积和液体静压力的一般方法、步骤以及思考路径。

By using solidworks software,The models of AOD converter shell and molten steel for obtaining the areal coordinates are created to make refined calculation about the tilting moment s of the new or old converters.

运用solidworks软件建立AOD炉及钢液的三维实体模型，以获取其重心坐标，并对新炉、旧炉倾动力矩进行了精确的计算，依据倾动力矩变化曲线提出了防止炉体自动倾翻的耳轴中心安全高度的合理位置。

The system gets two image of one object with two CCD, thus obtains depth from two CCD"s parallax. After investigating the operation spot and discussing with surgeons we use LED as markers, and get the marker"s 3-D position with a non-contact optics orientation method. After calibrating the CCD, processing the image, the system can figure out marker"s areal coordinates, get marker"s 3-D coordinate in dummy world coordinate system, thereby obtain instruments 3-D position and orientation. After the coordinate transformation and a series of orientation calculation, operation navigation comes true.

运用两个摄像机对同一目标从不同位置成像，进而从视差中恢复距离；通过对手术现场的仔细了解与手术医师的反复商榷，使用LED作为标志点，利用非接触式光学定位方法提取空间点位置信息：通过对摄像机的标定、图像处理及目标点重心的计算，求出空间点在虚拟世界坐标系下的三维坐标，从而确定了手术器械等的空间位姿，通过空间坐标转换及一系列定位计算，完成了手术导航实验系统。

The mechanical properties of argil fly-ash concrete and effectiveness of its application to abutment-backfill are investigated by material experiment, centrifugal modeling test and numerical calculation.

通过材料性能试验、土工离心模型试验和数值计算，研究陶粒粉煤灰混凝土的物理力学性能及其在桥涵台背回填的应用效果。

Exemplified by northern Tarim area of Xinjiang,the paper has also illustrated the achievements gained in layering ,calculation of argillaceous material conten.

本文概述了主分量分析法PCA的基本原理和自编的分析程序流程，并以新疆塔北地区为例，说明了分层、计算泥质含量及孔隙度的成果。

It is argued that we can give a precise and proper reflection of Aristotelian modal syllogism according to joint calculation.

本文认为，从联合演算出发，能更精确、更贴近地反映亚式模态三段论的原貌。

This algorithm allows parameterization and calculation in real time, using only simple fixed-point arithmetic operations and no data tables.

这种算法可以参数化和实时计算，只使用简单的定点算术运算和任何数据表。

Objective To explore the difference of arithmetic calculation between the heathy olders and the patients with mild cognitive impairmentwith functional magnetic resonance imaging.

目的 利用fMRI探讨正常老年人与轻度认知障碍患者计算能力的差异。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。