查询词典 sphere

Most women's lives were bounded by hearth and home, but they had great influence within this sphere.

大多数妇女的生活范围内的壁炉是和家庭，但他们有很大的影响力在这一领域。

Beyond lies the sphere of the heaven-born powers

高处安有诞生天堂力量的地方

They are trying to bring into their sphere of influence countries that heretofore they have not been able to control .

要控制这些国家，把过去不能控制的国家纳入他们的势力范围。

They are trying to bring in to their sphere of influence countries that heretofore they have not been able to control.

要控制这些国家，把过去不能控制的国家纳入他们的势力范围。

The acoustical radiation power is expressed as a Hermitian quadratic form, while the radiation modes is determined by general eigenvalue decomposing, and then the radiation efficiency is computed via the orthodoxy of radiation modes with regards to impedance matrix and average velocity matrix; lastly, the validity of the method is proved by pulsating sphere and radiating cube with analytical results.

先将结构的声辐射功率表示为一个正定的厄米特二次型，运用广义特徵值分解求解了复杂结构的声辐射模态，然后利用声辐射模态关于阻抗矩阵与均方速度祸合矩阵的正交性，求解了复杂结构的声辐射效率，最后用具有解析解的脉动球与辐射立方体验证了该方法的有效性。

According to the studied results at present, the studied objects are mainly thin plate and beam about sound radiation mode, a method computed sound radiation mode of complex structure is presented in this dissertation, according to the results of the previous two chapter, a theoretical method to solve acoustical radiation mode and acoustical radiation efficiency of complex structure by boundary element method and acoustical radiation theory is posed, the acoustical radiation power is expressed as a Hermitian quadratic form, while the radiation modes is determined by general eigenvalue decomposing, and then the radiation efficiency is computed via the orthodoxy of radiation modes with regard to impedance matrix and average velocity matrix; lastly, the validity of the method is proved by pulsating sphere and radiating cube with analytical results. According to results of the form three chapter, the structure sound radiation sensitivity is studied in detail, the sound radiation power of structure can be expressed as positive Hermitian quadratic form, the sound radiation sensitivity can be expressed as two parts by partial differential with respect to design variable, which are sensitivity of boundary velocity and impedance matrix, combined with the theory of FEM and BEM, the structure sound radiation can be translated to the analysis of structure dynamic sensitivity and impedance matrix sensitivity. The theory posted in this dissertation is tested by the FEM software ANSYS and the software AAS programmed by author.

在前几章的基础上，通过结构声辐射的模态理论对结构的声辐射的机理进行了深入地探讨，针对目前声辐射模态的研究对象主要是简单的板和梁类结构，提出了一种计算复杂结构声辐射模态的方法，利用前两章研究所得的结论，将边界元方法与广义特征值的理论结合起来研究了复杂结构的声辐射模态与声辐射效率，先将结构的声辐射功率表示为一个正定的厄米特二(来源：ABb7C论文0909网www.abclunwen.com)次型，运用广义特征值分解求解了复杂结构的声辐射模态，然后利用声辐射模态关于阻抗矩阵与均方速度耦合矩阵的正交性，求解了复杂结构的声辐射效率，最后用具有解析解的脉动球与辐射立方体验证了该方法的有效性。

This paper focuses on the study of the sphere hexagonal grid system, constructs a technical framework to satisfy with the expression and organization of the global multi-scale spatial data, enriches the theoretical system of the DGGS, and contributes to the early realization of the strategic objective of the Digital Earth.

本文重点研究了球面六边形网格系统，构建了满足全球多尺度空间数据表达与组织的技术框架，丰富了离散全球网格系统的理论体系，有助于早日实现"数字地球"的战略目标。

Virtual surface decompose eighth sphere to four volumes that topologies are same with hexahedral volume.

根据球体的几何特征将八分之一球体剖分成四个和六面体同拓扑的几何体。

At the same time, the algorithms of hexahedral mesh generation using isoparametric transformation based on cylindrical coordinate and sphere coordinate respectively are also integrated with Subdivision-Mapping Method The technique of mesh gradient control is also presented.

还提出了扫描法六面体网格生成算法、基于圆柱坐标和球坐标系的使用等参映射法的六面体网格生成算法以及网格局部加密算法，并完成了相应模块的开发工作。

Organization: Department of Mechanical Engineering, Qingdao Technological UniversityAbstract: In this paper, based on the tailoring and controlling of hydrofluoric acid, ZnO flower-like sphere micronanostructures were grown in an aqueous solution of zinc nitrate and hexamethylenetetramine.

摘 要：采用六水硝酸锌［Zn(NO3)2·6H2O］和六次甲基四胺(C6H12N4)作反应剂，基于氢氟酸的调控作用，利用低温液相技术制备了ZnO花-球微纳米结构。

I go to school at night.

我是上上学。

Clear Tip Nasal Aspirator: A soft time and gentle suction action makes removing excess mucus easy.

鼻吸明确提示：一个柔软的时间和温柔吸力行动使消除过剩的粘液容易。