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evolution characteristics of the precipitation in the Yangtze River delta based on the probability density

Chinese Physics B 2005年第6期14卷 1265-1271页

作者：曾红玲高新全张文 StateKeyLaboratoryofNumericalModellingforAtmosphericSciencesandGeophysicalFluidDynamics(LASG) InstituteofAtmosphericPhysicsChineseAcademyofSciencesBeijing100029China KeyLaboratoryofNationalMeteorologicalBureauClimateResearchCenter Beijing100081China KeyLaboratoryofNationalMeteorologicalBureauClimateResearchCenter Beijing100081China//DepartmentofPhysicsYangzhouUniversityYangzhou225009China

In this paper the dryness/wetness (DW) grade data of the Yangtze River delta is transformed into the temporal evolution of precipitation probability (PP), and its hierarchically distributive characters are revealed. Research results show that the precipitation of the Yangtze River delta displays the interannual, interdecadal, as well as longer quasiperiodic changes than a century, and all the periods have a confidence level of more than 0.05. In the DW grade series of 530 years, although the frequency of the small probability events (SPEs) of drought/flood in each area of the Yangtze River delta is different, the frequency of the SPEs triggered by the climatic background state is yet the same. This research result fully shows the significant impact of the climatic evolution as a background state upon the occurrence of SPEs, which will be instructive in climatic prediction theory and in raising the accuracy of the climatic prediction.

关键词： drought/flood small probability events Yangtze River delta probability evolution

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Dynamic property of phase transition for non-linear charged anti-de Sitter black holes

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Chinese Physics C 2022年第5期46卷 189-197页

作者： Yun-Zhi Du Huai-Fan Li Fang Liu Li-Chun Zhang Department of Physics Shanxi Datong UniversityDatong 037009China Institute of Theoretical Physics Shanxi Datong UniversityDatong 037009China

Understanding the thermodynamic phase transition of black holes can provide deep insights into the fundamental properties of black hole gravity and help to establish quantum *** this work,we investigate the phase transition and its dynamics for the charged EPYM AdS black *** reconstructing Maxwell's equal-area law,we find there exists a high-/low-potential black hole(HPBH/LPBL)phase transition,not only the pure large/small black hole phase *** Gibbs free energy landscape(G_(L))is treated as a function of the black hole horizon,which is the order parameter of the phase transition due to thermal *** the viewpoint of G_(L),the stable HPBH/LPBL states correspond to two wells of G_(L),which have the same *** unstable intermediate-potential black hole state corresponds to the local maximum of G_(L).Then we focus on the probability evolution governed by the Fokker-Planck *** solving the Fokker-Planck equation with different reflection/absorption boundary conditions and initial conditions,the dynamics of switching between the coexistent HPBH and LPBL phases is probed within the first passage ***,the effect of temperature on the dynamic properties of the phase transition is also investigated.

关键词： dynamic phase transition EPYM AdS black hole Gibbs free energy probability evolution

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