查询词典 dissertation

It mainly introduces the origin and development of DOA estimation and the current situation of related issues. Then, the content of this dissertation is determined.

主要介绍了DOA估计问题的起源和发展及相关问题的研究现状和存在的问题，继而确定了本文的研究内容和方向。

To enhance the tracking performance, in this dissertation, the zero phase error tracking control algorithm for discrete-time systems and the disturbance observer have been investigated with a proposal to combine ZPETC and DOB for improved tracking performance.

为提高系统的跟随性能，本文还对零相差跟随控制算法与干扰观测器结合的控制方案及干扰观测滤波器的设计方法进行了讨论。

Therefore, the following research work has been carried out in this doctoral dissertation

为此，作者在本文中主要进行了如下几个方面的研究工作

This doctoral dissertation focuses on this topic.

这是本文所关注的焦点。

It is the aim of this doctoral dissertation to research and resolve the problems described as above.

这便是本博士学位论文所要研究和解决的问题。

My doctoral dissertation is in the library at school. I went to see it.

学校图书馆收藏了我的博士论文，我跑去看它

He was involved in writing his doctoral dissertation.

他在聚精会神地写博士论文。

This doctoral dissertation deals with the impact of globalization on the problem of the national identity of Taiwan.

本研究探讨在全球化之下影响台湾国家认同的内部与外部因素。

The main contributions of this dissertation are In chapter 2, we propose a scientific visualization system modal which is based on large-format display technology and Client-Commware-Server structure. In chapter 3 and chapter 4, we accomplish two large-scale scientific visualization systems. In chapter 5 and chapter 6, we propose HFFT on hexagon and parallel dodecahedron domains, and reduce the computational complexity from O and O to O and O . Lastly, we propose a parallel HFFT on distributed memory computers.

本文的主要贡献如下：提出了使用大屏幕显示技术、适用于大规模科学计算可视化系统的Client-Commware-Server模型；实现了油藏数值模拟和分子模拟两个大规模科学计算的可视化系统；给出了二维三方向六边形区域、三维四方向十二面体区域上的HFFT算法，将变换的计算复杂度分别从直接计算的O和O量级降到了快速算法的O和O量级；最后，本文给出了一种基于分布式存储的并行HFFT算法，并对影响、提高并行算法的若干因素进行了分析。

For convenience, a series of simplifications to the structure are adopted in this dissertation, we use regular dodecahedron to instead of the sphere panel, so the analysis for the structure is simplified to study a pentagonal curvy structure.

同时，文中根据织物材料具有抗拉不抗弯的特性，运用膜单元来模拟织物结构。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。