弱引力透镜效应是宇宙学研究，特别是暗物质暗能量研究的重要手段之一。本申请项目将以CFHTLenS数据为基础，在剪切高阶相关统计，峰值统计，星系团物质分布，星系－星系引力透镜效应等方面展开深入研究。以我们已有的理论、观测研究为基础，我们将着重于探讨利用实际观测数据进行弱引力透镜宇宙学分析时可能存在的不同系统问题及如何从中准确地提取宇宙学信息。通过合作，我们亦将深入参与正在实施的弱引力透镜VOICE巡天，从数据分析入手，进而展开相关宇宙学研究。

Weak lensing effects have been recognized as one of the most important probes in cosmological studies, especially in understanding the nature of dark matter and dark energy. The research proposed here focuses on weak lensing analyses with real observational data from CFHTLenS, the highest standard data of weak lensing observations up to date. The specific studies include shear higher-order correlation analyses, weak lensing peak statistics, dark matter distribution of clusters of galaxies, galaxy-galaxy lensing analyses. Partially based on our previous theoretical and observational studies, we will pay particular attention to investigate different systematic effects occurred in real observational data and how they affect the extracted cosmological information. Through collaborations, we will also conduct detailed data analyses for the ongoing VOICE weak lensing survey and the subsequent cosmological studies.