椭圆的

This article studied the heat transfer character and the pressure loss in the shell side of the elliptic tube heat exchanger and the helical baffle heat exchanger and the traditional bow-shaped baffle heat exchanger through the experiment.

通过试验方法对椭圆管换热器与螺旋折流板换热器和传统的弓形折流板换热器进行了壳程传热性能和压降的研究，同时进行了壳程传热性能和压降的对比。

Results show that the morphology of HNS changes from short plane-like shape to long plane-like shape when non-solvent temperature changes from 25℃ to 50℃. The morphology comes through the variety of ellipsoid, short plane-like and club-shaped with pH value of non-solvent from acidity to neutral and finally basical, with the particle size distribution in 50-300 nm, 50-500 nm, and 50-600 nm, respectively. Ellipse plane-like and long club-shaped morphology HNS were obtained using white dextrine and sodium carboxymethyl cellulose as surfactants in non-solvent, with the particle size distribution in 50-300 nm and 50-600 nm.

结果表明：非溶剂温度由25℃升高到55℃后，HNS晶体形貌由短片状变为细长片状；pH值由酸性变化到中性再到碱性时，亚微米HNS的晶体形貌经历椭球状、短片状、棒状的系列变化，粒度分布分别处于50~300 nm、50~500 nm、50~600 nm；白糊精和羧甲基纤维素钠作为晶形控制剂修饰后的亚微米HNS晶体形貌分别椭圆片状和长棒状，粒度分布分别处于50~300 nm、50~600 nm。

At the same time, the electric potential and the electric intensity at the central axes and in the distance area of the charged ring are discussed.

本文中我们运用椭圆积分法计算出了均匀带电圆环空间电位和电场分布，使我们对其产生的电位和电场有一个全面了解。1均匀带电圆环的电位均匀带电q的圆环半径为b，以环心。

Guide this process is for a fixed image of the painting process, similar window slate can draw a straight, rectangular, circular, elliptical, hexagonal, five-pointed star is the six graphics, and can be outfitted with different types of fr a me color and fill color.

程序简介本程序是一个用于绘画固定图象的程序，类似window的画板，可以绘出，直线，矩形，圆形，椭圆，正六边形，正五角星六种图形，并且可以搭配不同的边框颜色和填充颜色。

By means of complex variable method together with conformal mapping,this paper analyzes the elastic problem of a plate with a elliptic hole wtih a straight edge-crack.

该文利用复变方法，通过保角映射研究了带裂纹的椭圆孔洞的平面弹性问题，给出了应力强度因子的解析解。

In the 1:250000 regional geological mapping of Yumenzhen, the authors studied deformation feldspar by long-short axis measurement method, compared with the deformation gravel, deformation amygdale, deformation relict long-short axis measurement, then found the both measurements were similar to deformation axis. It has been proved that deformation feldspar can be studied as to an area deformation characteristic of Yumenzhen.

在《1：25万玉门镇幅》调研的过程中，试以长石颗粒为研究对象，进行长短轴法变形测量，将其结果与相邻变形砾石、杏仁体和包体测量结果进行对比，发现它们具有相似的应变椭圆轴率，证实在变形花岗岩区可以用变形长石颗粒研究区域变形的特点。

Specializing in the production of C-, G-type of round, oval, rectangular and other specifications of tempered glass lid and a variety of household appliances for the bending of glass products, including: tempered glass cutting board, glass coasters.

专业生产C型、G型的圆形、椭圆型、方型等各种规格的强化玻璃锅盖和用于各种家用电器的热弯玻璃制品，包括：钢化玻璃菜板、玻璃杯垫。

Based on principle of protection a point and a line on the ground,this paper puts forward the principle of similar ellipse method to design coal pillar for protection of buildings,and the method and step are proposed.

在保护地面上一点、一条直线原理的基础上，提出了似椭圆法留设保护煤柱的基本原理，给出了留设保护煤柱的方法与步骤。

Finally, an involutes profile of an ellipse gears was formed using the method of computer graphics simulation. The accuracy and the validity of the mathematical model were confirmed by simulation.

最后，用计算机图形仿真的方法获得了椭圆齿轮的渐开线齿廓曲线图形，验证了该数学模型的正确性和有效性。

There exists downward inertial gravity waves in mesosphere, their phase fonts moves upward, and polar ellipses are anti-clockwise with increasing heights.

中层大气中存在下行惯性重力波，它们的等相面向上移动。通过分析它们的偏振关系，发现下行惯性重力波的偏振椭圆随高度增加而逆时针旋转。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。