标题： 非参数重建一些宇宙学参数 显示英文标题

标题： Non-parametric Reconstruction Of Some Cosmological Parameters

摘要： 本论文致力于使用多种观测数据集对一些宇宙学参数进行非参数重建。 宇宙被假定为空间均匀且各向同性的，因此由FLRW度规描述。 第一章提供宇宙学的简要介绍，并着重于重建方法。 第二章讨论了宇宙距离-唯象关系的评估。 第三章进行了宇宙急动参数的非参数重建。 第四章探讨了宇宙暗物质领域中非引力相互作用的可能性。 第五章尝试重新审视使用最近更新的背景数据集的各种组合以及来自红移空间扭曲的结构增长速率测量值对宇宙减速度参数的非参数重建。 最后，第六章包含关于本论文中所展示整体工作的总结性评论和相关讨论。 显示英文摘要

摘要： The present thesis is devoted to the non-parametric reconstruction of some cosmological parameters using diverse observational datasets. The Universe is assumed to be spatially homogeneous and isotropic, thus described by the FLRW metric. The first chapter provides a brief introduction to cosmology and focuses on the reconstruction methods. An assessment of the cosmic distance-duality relation is discussed in chapter 2. In chapter 3, a non-parametric reconstruction of the cosmological jerk parameter is carried out. Chapter 4 explores the possibility of a non-gravitational interaction in the cosmic dark sector. In chapter 5, attempts are made to revisit a non-parametric reconstruction of the cosmic deceleration parameter using various combinations of recently updated background datasets and the growth rate of structure measurements from the redshift-space distortions. Finally, chapter 6 contains the concluding remarks and relevant discussion regarding the overall work presented in the thesis.