准周期震荡（QPO）是X射线双星中普遍存在的一种时变现象。QPO的起源与吸积盘结构、辐射机制等紧密相关，QPO的观测研究将为XRB的理论提供更加全面的观测依据。根据XRB时变的研究现状，本项目利用X射线天文卫星的观测数据从几个不同方面开展QPO的观测研究。利用新发射和即将发射的X射线卫星的观测数据，研究XRB的高能和低能时变现象，完善在此两个能段的观测证据，为理论研究提供全X波段的观测信息。通过希尔伯特-黄方法开展QPO波形、相位及其频率变化的分析，探索QPO的形成机制。通过QPO的相位分解谱、时变和能谱的相关性，研究QPO的起源和辐射性质。

Quasi-periodic oscillations (QPOs) are a fairly common timing phenomenon in X-ray binaries (XRBs). Their physical origin is closely connected with the structure of the accretion disk and radiation mechanisms. The study of these QPOs will provide further observational evidences for XRB theoretical models. Based on the research status of the timing analysis of XBR, we decide to study the QPO properties from several aspects in this project. Using observational data from some X-ray missions already on orbit or soon to be launched, we decide to make timing analyses in both high and low energy bands, and complete observational evidences in these energy bands to provide more comprehensive observation information for theoretical research. Using hilbert-huang transform (hht) to study the variation of the shape, phase and frequency of the QPOs can help us better understand the QPO formation mechanism. By studying the connection among phase-resolved spectrum, timing and energy spectrum, we can explore the origin of the QPOs and theirs radiation properties.