查询词典 atom structure

But because of its big slenderness ratio, smaller rigidity and damping, it is easy to cause a larger vibration in the windload and iceload function and so on, mast structure destruction accidents frequently occurred, has caused engineering and academic circles\\\s concern, this article summarizes the main structure damage diagnosis methods, carrys on preliminary dynamic analysis and the time-frequency distribution analysis with the vibration signal to the mast structure, and proposes the signal processing method is a appropriate method on the diagnosis to the mast damage.

但是，由于桅杆结构长细比很大，刚度、阻尼较小，在风荷载、裹冰荷载等作用下容易产生较大幅度的振动，桅杆结构的破坏事故时有发生，引起了工程界和学术界的重视，本文总结了几种主要的结构损伤诊断方法，并对桅杆结构进行了动力分析和振动信号时频分析，并提出信号处理的时频方法对桅杆损伤进行诊断比较合适的。

Details punching process different forms of the characteristics and difficulties, an analysis of the tubes in the process of punching force and deformation of the tube, giving details of the tube clamping and reverse punch the need for pre-deformation and design methods, introduction of specific modules can be combined Guanzi punching die structure design and manufacture of key components, the introduction of simple structure, low manufacturing costs, assembly convenience of fast and flexible, applicable to many varieties, short-cycle preparation and application of the superiority of the scope of After the structure of the tube to improve the punching mold, significantly broadens the scope of the existing pipe punching process and the application of mold capacity.

工程类的汉译英，帮忙翻译下谢谢详述了管子冲孔工艺不同形式的特点和难点，分析了管子冲孔过程中的受力情况以及对管子变形的影响，详述了管子冲孔夹紧及反向预变形的必要性和设计方法，具体介绍了单元可组合式管子冲孔模具结构的设计及关键零件的制造，介绍了具有结构简单、制造成本低、组装方便快速灵活、适用多品种、准备周期短的优越性及应用范围，经过结构改进的管子冲孔模，大大拓宽了现有管子冲孔工艺范围和模具的适用能力。问题补充：请不要用在线翻译的功能搞，翻得很不好

These data suggest that the terminal hairpin structure and ITRs of PfDNV play a key role in the rescue and gene correction process: sequence at the junction of the terminal palindrome of PfDNV genome and the pUC119 can form typical Holliday structure, it can be cutted by the special endonuclease, then the exposed 3'hairpin structure serving for a self-primer to initiate viral DNA replication; and the intact extremity acting as a template to repair another altered end within inverted terminal repeats.

说明存在着一种拯救和基因修复机制，推测与PfDNV基因组末端结构（Hairpin、ITR）有密切关系：PfDNV基因组与pUC119质粒连接处可形成Holliday结构而被识别该结构的核酸内切酶所切割，游离下的基因组3'发夹结构作为引物起始复制，然后被置换链的完整的5'ITR作为模板修复部分缺失的另一端ITR，推测这个过程需要病毒NS蛋白以及细胞因子的参与。

In this thesis, the radiation principle and the structure of slot antenna are studied and the impacts on its performance of every structure parameter in a slot antenna design are analyzed. On this foundation, a design plan of planar slot array antennas is proposed. The design has some structural feature as follows:(1) with different dielectric layers and microstrip line structure to guide the electromagnetic wave effectively;(2) the feeding network formed of microstrip line can match with the radiating slots expediently;(3) in order to increase the bandwidth of the antenna, the wider slot and branched feeding microstrip line are adopted to form a double resonance.

本文对缝隙辐射的原理、缝隙天线的结构作了探讨，分析了缝隙天线设计中各结构参数对其性能的影响，并在此基础上提出一种平面型缝隙天线的设计方案，它具有以下的特点：(1)采用分层结构，以不同的介电系数和微带线结构形成对电磁波的有效引导；(2)利用微带线构成馈电网络可以方便地与辐射缝隙进行匹配；(3)增大缝隙的宽度，并利用馈电微带线的枝节形成双谐振，以增加天线的带宽。

Helicopter Design Institute of China Aviation Industry deputy chief designer, AC313 helicopter designer Xu Chaoliang description, AC313 helicopter innovation embodied in the eight key technology breakthroughs: 30 minutes drive to meet the "dry run" security requirements ; fuel system and body structure to meet the anti-crash and lightning safety requirements; driver and passenger seat crashed through the anti-dynamic security testing; body structure, control systems and meet the bird impact rotor system security requirements; airborne equipment to meet the lightning and high strength radiation protection design requirements; cockpit layout to meet the crew emergency evacuation safety requirements; rotor and composite material structure to meet the fatigue assessment based on damage tolerance requirements; mechanical systems to meet the design requirements of high energy rotor burst protection.

中航工业直升机设计研究所副总设计师、AC313直升机总设计师徐朝梁介绍，AC313型直升机的自主创新具体体现在八项关键技术的突破上：传动系统满足30分钟的&干运转&安全性要求；燃油系统和机体结构满足抗坠毁及雷击安全性要求；驾驶员和乘员座椅通过抗坠毁动态安全测试；机体结构、操纵系统及旋翼系统满足鸟撞安全性要求；机载设备满足雷击和高强辐射场防护设计要求；座舱布局满足乘员应急撤离安全性要求；旋翼和复合材料结构满足基于损伤容限疲劳评定要求；机械系统满足高能转子破裂防护设计要求。

By examining the correlations among deep structure, surface structure and semantic interpretation in transformational and generative grammar, this article states that surface structure has a definite function in semantic interpretation.

纵观转换生成语法发展中深层结构、表层结构、语义解释之间的关系，表层结构对语义解释起一定的作用。

Bases on the XML Key, the algorithm firstly dealt with XML structure to vector matrix, then used project frequent pattern tree to optimize the XML structure through dissociating, uniting, updating and canceling to satisfy the conciseness of the XML structure and query multiversity.

该算法以XML键为基础，利用向量矩阵处理方法、投影频繁模式树实现XML结构的分裂、合并、更改与取消等操作，同时讨论XML键向量矩阵频繁项集的划分规则及相应启发式策略与支持度阈值。

The structure of polysaccharides can be classified into primary structure and advanced structure.

多糖的结构分为初级结构和高级结构。

The point-tree data structure, which is suitable for describing polytopes in En space, Compared with the "three-table data structure" used in E3, this structure decreases the complexity of time and memory represented in En polytopes with the efficiency of computer processing heightened.

同人们所熟知的三维空间中的几何外形信息一样，E&中形体的几何&外形信息主要也是包括几何信息和拓扑信息这两个方面。

Then judging from SCP mode of Harvard school, the paper analyses market structure of our country in detail, combines with property rights structure and reclassifies Chinese market structure according to the enterprises quantity and exit barriers as well as products discrepancy.

依据哈佛学派的市场结构-行为-绩效的分析范式，本文又对我国国有经济的市场结构进行了详细分析，并结合中国转轨经济的产权结构特征，按照厂商数量、进入和退出壁垒、产品差异以及产权特征的标准，对中国国有经济的市场结构进行了重新划分。

The role of the environment is very important.

的作用，环境是非常重要的。

At that time, the High Court of England and Wales Court of Queen's Bench president of William Murray, Lord Mansfield in June 22, 1772 ruling:"No matter then there is the inconvenience, but there must be a decision, I can not say that this case under the law in England are permitted or authorized; are so black should be released."

当时的英格兰及威尔士高等法院王座法庭院长William Murray， Lord Mansfield于1772年6月22日宣判：「无论有那麽不便，但总要有个决定，我不能说这件案在英格兰法律之下是准许或认可；所以黑人是应该被释放。