查询词典 conical helix

ABSTRACT In this article the manufacturing method and characteristics of the double wall brazed tube with inner helix groove are given.

摘 要 介绍了内螺旋槽双层卷焊管的制造方法及这种管材的特点。

Based on general process of public policy analysis, using the Triple Helix theory, The Interest Group theory and Policy Network theory, with adopting methods of historical analysis, literature analysis, case study and comparative analysis, the dissertation firstly examines irrespectively the history, content, process and outcome of American research university technology transfer policies; Then, the dissertation analyses the value orientation, experiences and issues systematically, putting forward some policy suggestions for Chinese university technology transfer according to Chinese practical needs.

本文依公共政策分析的一般逻辑，运用三重螺旋理论、利益集团理论和政策网络理论，采取历史分析法、文献法、个案法、比较法等研究方法，首先从美国研究型大学技术转移政策历史、政策文本、政策过程、政策结果几方面分别论述，然后对美国研究型大学技术转移政策的价值取向、经验和问题进行了总体分析，并结合我国实际需要，为我国高校技术转移提出适宜的政策建议。

For several days, the watson, Krick jubilantly are building the model in theirs office with the iron sheet and the iron wire. on February 28, 1953, the first DNA double helix structure's molecular model was born finally.

一连几天，沃森、克里克在他们的办公室里兴高采烈地用铁皮和铁丝搭建着模型。1953年2月28日，第一个DNA双螺旋结构的分子模型终于诞生了。

The bovine Smad 9 gene codes 345 amino acids and shares 78.84%, 79.21%, 77.88% and 70.38% similarity in amino acid sequences with human, mouse, rat and jungle fowl respectively. The bovine Smad 9 had no signal peptide and transmembrane helix.

通过核酸序列分析发现，牛Smad 9基因编码345个氨基酸残基，牛Smad 9蛋白无跨膜区和信号肽序列，该蛋白与人、小鼠、大鼠和红原鸡在氨基酸序列上分别有78.84%，79.21%，77.88%和70.38%的同源性。

Exhibits a rare structure of a meso-helix which is a 3D presentation of a lemniscate. 14 and 15 are isomorphic one-dimensional helical structures.

化合物 14 和 15 同构，它们都是由金属离子和3，5－二硝基水杨酸的羧基组成的一维螺旋链结构。

The induced supramolecular chirality was found to be dependent on the absolute configuration of lateral residues, that is, the polymers with-configurational oxazolinyl chromophores tended to form chiral aggregates with levorotatory handedness, while polymers obtained from the-monomer offered dextrogyrate one upon the addition of Cu salt. A model, in which side groups would arrange in a helix fashion, is employed for describing the unusual chirality.

由此提出了侧基在Zn／Cu协同配位作用下形成螺旋状排列的模型，即侧基螺旋模型。N-噁唑啉苯基马来酰亚胺与甲基丙烯酸甲酯共聚得到了耐热性能好(热分解温度大于296℃)的光学活性聚合物~(25D=-7.8°(来源：Af4BC论文网www.abclunwen.com)～-36.6°。

The boardening of the spectral line in the spectrum when the helix stucture is perpendicular to the atomic be...

观察了螺旋线慢波结构轴与原子束垂直放置时波谱中谱线的增宽，并进行了讨论。

The leaf is large, intimate circle, part is born cauline top, palm state divides mid, lobation is linear wrap around needle form, gradually pointed, topmost 2 crack, two side provide petiole dentate spinule, halberd dash forward apparent, spadix armpit is unripe, bigger, individual plant of different of male and female, female flower is big, globose, helix shape is worn be born on spicule axis; Male flower is small, yellow, move unripe Yu Xiaobao piece in sunken acupuncture point, fructification is close globose, diametical 10-20 centimeter, black Brown, exocarp is smooth, mesocarp is thicker, fiber is qualitative, endocarp is by 1-3 hard osseous divides pit composition.

叶大型，近圆形，集生茎顶，掌状分裂到中部，裂片线状披针形，渐尖，顶端2裂，叶柄两侧具齿状小刺，戟突明显，肉穗花序腋生，较大，雌雄异株，雌花大，球形，螺旋状着生于小穗轴上；雄花小，黄色，着生于小苞片的凹穴里，果实近球形，直径10-20厘米，黑褐色，外果皮光滑，中果皮较厚，纤维质，内果皮则是由1-3枚硬骨质的分果核组成。

Sex of arteriosclerosis of result lower limbs is out-of-the-way 2 dimension behave disease on supersonic image for pathological changes blood-vessel inside in film is shown irregular add thick, local show strong echo spot, and to hemal antrum inside protuberant, hemal antrum internal diameter shows irregular stricture, pathological changes paragraph solid sex is low it is thus clear that inside hemal antrum echo smooth group fills up; color much general straps blood stream to show resemble showing to; of blood stream signal is not had inside hemal antrum multilayer helix CTA shows pathological change paragraph hemal area does not have comparative agent, show what side raises artery to take travel and initiative place at the same time.

结果下肢动脉硬化性闭塞症二维超声图像上表现为病变血管内中膜呈不规则增厚，局部呈强回声斑，并向血管腔内突起，血管腔内径呈不规则狭窄，病变段血管腔内可见实性低回声光团充填；彩色多普勒血流显像显示血管腔内无血流信号；多层螺旋CTA显示病变段血管区域无对比剂，同时显示侧支动脉的走行及起始部位。

The working principles of the MFCG with a perfect helix winding are shown in two ways: the magnetic flux conservation and the magnetic flux linkage conservation.

总结了MFCG区别于普通发电机的根本特征，鉴于MFCG种类繁多，依据绕组结构和形状、电枢运动方式、适用的物理原理、应用领域等特性对19类MFCG进行了系统分类，并分别讨论了各类别的技术特征。

He paid $5,000 for this cupcake.

他我这个纸杯蛋糕花了5000美元。

I mean, if you want to, that is

我的意思是，如果你们想吃的话。