螺旋

In this paper, based on the vector analysis and the warping torsion theory of curved thin-walled girders, a set of governing differential equations for the non-uniform torsion of thinwalled spatial helicoid girders is developed.

本文应用矢量运算及薄壁曲线梁翘曲扭转理论，建立了空间螺旋形的薄壁曲线梁基本微分方程，用初参数法解出翘曲扭转微分方程，为进一步进行薄壁螺旋曲线梁的空间结构分析提供理论基础。

A helicoidal surface in Minkowski 3-space is defined as the orbit of a plane curve under a screw motion.

三维Minkowski空间中的螺旋面是一条平面曲线经由螺旋运动所生成的曲面。

HIRA proteins are characterized by 7 conserved WD repeats in their amino-terminus, which are predicted to assemble into a β-propeller structure known to mediate protein-protein interactions.

HIRA蛋白家族在N端的7个WD重复区，推测形成一个β螺旋结构，该β螺旋结构可能与蛋白质—蛋白质互作有关。

The lines in the P^3 will be mapped to the points in the P^5 by using the Klein mapping representation and the homogeneous Plücker coordinates, the dependency of screw system is determined, criterions of dependency are given, and the dependency on different geometrical conditions are listed.

利用Klein映射表示法，通过齐次Plücker坐标将P^3中的线映射为P^5中的点，来确定螺旋系的相关性，给出了相关性的判据，并列出了在空间不同几何条件下螺旋系相关性列表。

The machining method of the horning wheels based on Gleason spiral bevel gear generators are studied in a deepgoing way, the corresponding algorithms to obtain the geometric parameters of both the workpiece and honing wheels, and the parameters of cutter head and machine setting for the machining of horning wheels are introduced in details.

为了解决大批量Gleason制螺旋锥齿轮制造中的热后精整问题，本文提出了将珩齿技术应用于螺旋锥齿轮的硬齿面加工中，并提出了珩磨轮的优化设计方法，研究了珩磨轮的特殊制造工艺中存在的拨模干涉检验、干涉修正及金属模的加工方法等问题。

Methods SCT findings in 21 cases with pathologically proved hepatic hydatid cyst were retrospectively analyed.

回顾分析经本院螺旋CT检查及手术病理证实的21例肝包虫病螺旋CT表现。

Objective The purpose is to assess the role of imaging using spiral CT with drug-induced hypotonia and water filling in staging of gastric carcinoma and preoperative assessment.

目的通过对本组胃癌病人进行螺旋CT扫描的前瞻性研究，旨在提高螺旋CT在胃癌CT分期和术前评估的准确性。

In order to induce the inductor model, the loss mechanics of spiral inductor are analyzed.

为了完成平面螺旋电感的建模，分析了平面螺旋电感的多种损耗机制。

The development of planar spiral inductor and the importance of its designing are introduced in the very beginning of the paper.

本论文首先介绍了平面螺旋电感发展的状况，以及平面螺旋电感设计的重要性。

But with its variety and specialization , three-axial non-instaneous envelope method had not meet needs. So four-axial non -instaneous envelope method was set forth firstly in this article, which is based on three-axial non-instaneous envelope and spiral rod compressor rotator speciality.

然而随着螺杆应用范围的扩展，螺杆型线不断复杂化、多样化，三自由度无瞬心包络铣削法已不能满足部分型线的加工要求，为此本文在三自由度无瞬心包络铣削法的基础上，针对螺杆压缩机阴阳转子的特性，在国内首次提出四自由度无瞬心包络铣削螺旋曲面的新方法，赶超国际螺旋曲面加工技术水平，具有重要的理论和现实意义。

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