查询词典 helical

In 2 case Moyamoya disease, 16 row helical CT angiography showed paragraph of obliteration Central vessels and branch stem paraplasm.

烟雾病2例，16层CT容积成像显示闭塞血管近段及颅底异常增生侧枝血管。

Results Multislice helical CT is considered the best imaging method to assess the invaded peripancreatic vessels in pancreatic cancer.

结果 多层螺旋CT是判断胰腺癌可切除性的最佳影像学方法。

Objective: To study the scan technique and methods of multi-slic e helical computed tomography angiography for peripancreatic vessels.

目的：探讨多排螺旋电子计算机体层扫描胰周血管成像的扫描技术和成像方法。

Depending on the amino acid sequence, the length of the ∝-helical portio are held together by hydrogen bonds formed between r grou , by salt linkages, by hydrophobic interactio , and by covalent disulfide（-s-s-0 linkages.

根据氨基酸顺序的不同，此α-螺旋段的长度也不同，并赋予独特的三级结构，这些折叠部分是靠R基团之间所形成的氢键，靠盐键、疏水相互作用以及共价二硫键而结合在一起的。

Purpose:To evaluate the role of helical CT in diagnosing and staging of duodenal neoplasm preoperatively.

目的 ：探讨螺旋CT对十二指肠肿瘤诊断及术前分期的临床价值。

A novel conical printed quadrifilar helical antenna for GPS application is presented.

提出了一种应用于全球定位系统的宽波束圆极化圆锥印刷四臂螺旋天线。

The second part of this thesis was the synthesis of several compounds with helical structure. Starting from 2,7-dihydroxynaphthalene, we synthesized racemic 2,13-dihydroxy[5]-helicene.

在合成螺旋骨架化合物的工作中，我们以2，7-二萘酚为原料出发，经过路线摸索，合成了外消旋的螺旋化合物[5]-helicene。

Completely different crystal structures and morphology were shown in the meltdrawn films of two kinds of tacticity of sPP. A continuous conformational transform from the 〓 into the of sPP was induced by further stretching. While the zigzag conformation can retransform back to helical 〓 one after annealing above 80℃, the mechanism of conformation transform has been introduced.

Petermann教授学科专业高分子化学与物理研究领域\研究方向学位级别博士学位授予单位中国科学院长春应用化学研究所学位授予日期2001 论文页码总数114页关键词聚丙烯聚丁烯共聚物聚α-烯烃馆藏号BSLW /2003 /O632 /3 用电子显微学、电子衍射、DSC和FTIR等技术对聚α-烯烃及其共聚物的晶体结构和相转变行为进行了系统地研究，包括间同立构聚丙烯、全同立构和间同立构聚丁烯-1（iPB-1，sPB-1）、以及丙烯-丁烯-1间同立构共聚物。

Based on the deep research of structure characteristics of the shell-side of the shell-and-tube heat exchanger and laws of fluid flow and heat transfer, the concept of "sideling flow" in the shell-side is presented for the first time, which is relative to the flow states of the cross-flow, the longitudinal-flow and the helical-flow.

在上述壳程流体&斜向流&状态理念的指导下，首次研制开发了新型高效节能管壳式换热器—帘式折流片换热器，改进和发展了换热器壳程的结构形式，实现了壳程流体的斜向流动。

The liquid crystal display has a chiral ferroelectric smectic liquid crystal between two transparent plates with electrodes for generating an electric field, and polarisers in front of and behind the liquid crystal, the ratio d/p of the thickness d of the liquid crystal layer to the pitch p of the helical twisting being larger than 5, the smectic tilt angle theta 0 being between 22.5 DEG and 50 DEG , and the product d.

一种液晶显示单元，它具有：一种在两块透明平板之间的手性铁电近晶液晶；用于产生电场的电极；在液晶前后各有一偏振片，液晶层的厚度d与螺距扭曲的螺距高度p的比值d／p大于5，近晶倾角θ 0 为22.5～50°，厚度d、倾角θ 0 的平方、双折射率△n和光波长λ倒数的乘积dθ 2 0 △n1/λ大于0.45μm。

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