螺旋环

Newtonian fluid; helical flow; eccentric annulus; pressure gradient; undetermined coefficient method

Newton 流体；螺旋流动；偏心环空；压力梯度；待定系数法

Each half of the domain consists of two α-helices connected by a peptide loop.

该结合域的每一半由两个α-螺旋通过一个肽环连接在一起。

Most of them involved a construction of ramps that either spiraled around the pyramid as it grew or led directly to the current level of construction.

大部分学者认为通过建造斜坡，可能是随着高度的增加，建环金字塔螺旋形的斜坡，也可能笔直的至现在金字塔的高度。

In toroidal geometry, each toroidal tearing mode is composed of several different cylindrical components.

本文对不同螺旋之电阻撕裂模之间的环耦合和非线性耦合进行了仔细的理论分析。

ABSTRACT Theoretical analyses have been done for toroidal and nonlinear coupling of resistive tearing modes with different helicities.

本文对不同螺旋之电阻撕裂模之间的环耦合和非线性耦合进行了仔细的理论分析。

METHODS: Differences of the vasodilating action of Ipt in big artery and small artery were studied using isolated rat tai l artery helical strips and aortic rings, and the effects of Ipt on potassium cu rrents in smooth muscle cells derived from rat tail artery were observed by usin g patch clamp technique.

采用大鼠尾动脉螺旋状血管条和主动脉离体血管环两种组织，对比观察盐酸埃他卡林对大、小动脉扩张作用的药理学特性，并且利用膜片钳技术观察盐酸埃他卡林对大鼠尾动脉平滑肌细胞钾电流的影响。

The outer structure does exhibit tidal features, as does the symmetry of the inner spiral pattern and the kinked arms just beyond its inner ring.

外围结构展示出了潮汐特征，对称的内螺旋和卷曲的臂刚刚超越了它的内环。

The research shows that there is not any published article introduce stablizer that used in gas drilling, thus there is no evaluation about the conventional auger drill stabilizer's impact on cutting-carrying and lifting ability of the annulus gas.

调研发现，公开发表的文献中，目前没有文章介绍专用于气体钻井的钻柱稳定器，也没有就气体钻井使用常规螺旋钻柱稳定器对环空气体携岩举升能力造成的影响进行评价。

Based on the basic theroy of fluid dynamics, this paper establishes a model of flow mechanics for turbulent flow, then uses this model to carry on a numerical simulation study on the conventional auger drill stabilizer annular flow field.

基于流体力学基本理论，本文建立了一套钻柱稳定器湍流模式力学模型，并采用该模型，对气体钻井常规螺旋钻柱稳定器环空流场进行了数值模拟研究。

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我们的产品是钛、镍、钼、钽、锆等稀贵金属材料加工；管、棒、丝、带、板、箔、网、饼环及合金制品；反应设备（500L反应釜、钛钢复合反应釜、钛外盘管加热反应釜、镍钢复合反应锅）；换热器（钛列管式换热器、钛板式换热器、镍换热器、钛螺旋板式换热器）；复合板（钛钢复合板、钛铜复合板、钛铝复合板成品）；配件及加热器（钛网蓝、钛法兰、钛螺母钛过滤器、钛泵、钛盘管、阳极、钛离心机、钛加热器、各种非标设备及配件。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失