本文对二次结构系统抗震设计的重要性进行了介绍，并对二次结构系统的动力特性进行了概括。
The importance of the seismic design of the primary-secondary systems is introduced and the dynamic characteristics of the combined systems are outlined in the paper.
陨坑中心可能是由于不同寻常的下层地质结构导致的，也有可能因为幸运的二次撞击而形成的。
The central crater could be formed by unusual layers below the surface, or from a lucky second impact.
第二次遍历使用与前一个例子十分类似的分组逻辑创建了一个两层结构：chapter和section。
The second pass USES grouping logic much like the previous example to create two levels of structure: chapter and section.
本文阐述了二次空气阀的结构、工作原理和匹配要点。
This article introduces the structure, operating principle and key matching points of secondary air valve.
NiLFS(2)是日本Nippon Telegraph and Telephone（NTT）开发的一种日志结构文件系统的第二次迭代。
NiLFS(2) is the second iteration of a log-structured file system developed in Japan by Nippon Telegraph and Telephone (NTT).
由于采用了双阀孔结构设计，在最大压差下排放凝结水的同时，还有一个为二次蒸汽系统设计的预设压差系统在工作。
Because of the dual-orifice design, there is a preset controlled pressure differential for the secondary steam system, while maximum pressure differential is available to discharge the condensate.
阐述了生物燃料电池和以病毒为模板的二次电池的工作原理以及在电池结构和性能等方面取得的研究成果。
The principle of the biofuel cell and virus-enabled rechargeable battery and the relationship between the cell structure and the performance are described.
借助已有的水下爆炸理论，分析试验结果，总结了地基及结构振动的规律，指出二次振动现象与水中爆炸产生的气泡脉动有关。
According to the existing theories on underwater explosion and based on the analysis of experimental results, the laws of foundation and structure vibrations are summarized.
介绍了传感器具体结构及二次仪表。
The structure of the sensor and the instrument are introduced.
不同的转动数下流场的形态有明显的差别，这表明由哥氏力引起的二次流在确定流场结构时起重要的作用。
The evident difference among the flow patterns with different rotation number shows that the secondary flow induced by Coriolis force takes an important role in determining the flow structure.
介绍薄型透明片的结构设计及模具设计制造、注射成型、二次加工。
Structure design, mould design and manufacturing, injection forming and second processing of thin lens are introduced.
在结构承受较大初始荷载情况下，二次受力问题对加固梁的抗弯刚度、极限承载能力、延性存在一定影响；
When the initial load is big, the secondary load could influence the performances of CFRP reinforcement on all aspects as mentioned above.
采用两步工艺法制备具有二次微粒结构的白炭黑，并对其性能进行研究。
The silica with secondary particle structure was prepared by a two-step process, and its properties were investigated.
通过工程试验研究，观测到水下爆炸引起的地基及水中结构物的二次地震波现象。
The phenomena of secondary vibration of structures induced by underwater explosion are observed in the experiments.
由粉石英制备的硬硅钙石二次粒子球具有中空结构，而白炭黑对应样品则以纤维聚集成的块体为主，成球差。
The secondary particle sphere of xonotlite yielded by konilite is of hollow structure, however, for the carbon white fibrous crystal just stacked densely and balling up is poor.
介绍了一种预混式二次燃烧系统，包括其结构、工作方式、原理等。
A kind of premixed secondary combustion system was introduced in this article, including its structure, working, principium and so on.
在形状优化的基础上，采用二次优化技术，对结构的截面尺寸进行了优化。
Based on shape optimization, we use second optimization technology to optimize structure section size.
计算获得了分离流、二次流和多尺度旋涡结构，表明SST模型能很好地预测尾水管内的湍流流动。
Finally, separation flow, secondary flow and multi-scale eddy structure are simulated, it indicates that SST model can give a good prediction of turbulence in the draft tube.
接口二次开发是目前结构有限元模型修正技术比较活跃的一个应用领域。
The connection quadric exploit is a quite active application domain of present structure computation model updating technology research.
本文主要论述了CAD二次开发技术在混凝土结构施工图绘制中的应用。
This paper mainly discusses the application of the Secondary Development of CAD technology in concrete structure plans drawing.
研究结果表明：通过优化有效降低了因二次流漩涡、风机蜗舌结构、尾流-射流和正冲角等造成的能量损失，提高了离心通风机性能。
The results show that the performance of optimized fan is improved by lowering the energy loss which caused by the secondary flow vortex, the volute tongue, the wake-jet and the angle of attack.
本文介绍了最新研制开发的更先进的第三代收球网与二次滤网的结构特点、工作原理及使用性能。
This paper describes the structure features, operation principle and operation performance of there devices newly developed as the products of third generation.
本文是研究利用天然地震PS转换波及PPP等二次波到时资料反演地壳上地幔速度结构的尝试。
An inversion of velocity structure of crust and upper mantle by using converted PS wave and multiwave PPP etc, is reported in this paper.
介绍了二次送电开关的结构、工作原理及优点。
The composition and working principle, advantages of secondary power switch were introduced.
该复合物研究结果为镁二次电池正极材料结构设计的开发提供了新的思路。
The results of this study provided a new thought for structure design and development of a potential cathode material for rechargeable magnesium batteries.
本文介绍了双作用叶片式二次元件的结构和工作原理，分析了其节能原理和特点。
This paper presented the working principle and structure of the double-action vane pump, analyzed its mechanism of variable displacement and characteristics of energy saving.
研究了一次流参数和二次喷管结构对引射效能和发动机推力的影响，找到了逐步提高推力的措施。
The influence of primary flow and secondary nozzle geometry on ejector effect and thrust was investigated, and the approach to increase thrust of rocket ejector was found gradually.
利用APDL语言对ANSYS软件进行二次开发，建立楔环连接结构的参数化有限元模型。
The parametric finite element model (FEM) of wedged-ring joint structure was established using ANSYS parametric design language (APDL).
利用APDL语言对ANSYS软件进行二次开发，建立楔环连接结构的参数化有限元模型。
The parametric finite element model (FEM) of wedged-ring joint structure was established using ANSYS parametric design language (APDL).
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