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Topology of charged AdS black hole in restricted phase space

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Chinese Physics C 2024年第9期48卷 291-299页

作者： Han Wang yun-zhi du College of Mathematics and Statistics Shanxi Datong UniversityDatong 037009China Department of Physics Shanxi Datong UniversityDatong 037009China Institute of Theoretical Physics Shanxi Datong UniversityDatong 037009China

The local topological properties of black hole systems can be expressed through winding numbers as *** date,AdS black hole thermodynamics are often depicted by the dual parameters of(T,S),(P,V),(Φ,Q) in the extended phase space,while there have been several studies on the black hole thermodynamics in the restricted phase *** this paper,we analyze the topological properties of charged AdS black holes in the restricted phase space under the higher-dimension and higher-order curvature gravity *** results show that the topological number of the charged black hole in the same canonical ensembles is a constant and is independent of the concrete dual thermodynamical ***,the topological number in the grand canonical ensemble is different from that in the canonical ensemble for the same black hole ***,these results are independent of dimension d and highe st order k of the Lanczos-Lovelock densities.

关键词： topology phase transition black hole

Phase equilibrium and microstructure of topological AdS black holes in massive gravity

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Chinese Physics C 2022年第8期46卷 230-243页

作者： Fang Liu yun-zhi du Ren Zhao Huai-Fan Li Department of Physics Shanxi Datong UniversityDatong 037009China Insitute of Theoretical Physics Shanxi Datong UniversityDatong 037009China

In order to clearly understand the gravitational theory through the thermal properties of the black hole,it is important to further investigate the first-order phase transition of black *** this paper,we adopt different conjugate variables(P~V,T~S,C_(1)~c_(1),and C_(2)~c_(2)) and apply Maxwell's equal-area law to study the phase equilibrium of a topological black hole in massive *** condition and latent heat of phase transition are displayed as well as the coexistent curve of *** result shows that the phase transition of this system is the high/low electric potentials one,not only the large/small black holes *** also analyze the effect of the model's parameters on phase *** we introduce a new order parameter to probe the microstructure of this *** work will provide the theoretical basis to study the phase structure of topological black holes in massive gravity and to further explore the gravitational theory.

关键词： black hole first-order phase transition Maxwell's equal-area law microstructure

Use of curcumin in diagnosis,prevention,and treatment of Alzheimer＇s disease

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Neural Regeneration Research 2018年第4期13卷 742-752页

作者： Min Chen zhi-yun du Xi Zheng Dong-Li Li Ren-Ping Zhou Kun Zhang Institute of Natural Medicinal Chemistry & Green Chemistry College of Light Industry and Chemical Engineering Guangdong University of Technology Guangzhou Guangdong Province China Susan Lehman Cullman Laboratory for Cancer Research Department of Chemical Biology Ernest Mario School of Pharmacy Rutgers The State University of New Jersey Piscataway NJ USA Wuyi University Jiangmen Guangdong Province China International Healthcare Innovation Institute (Jiangmen) Jiangmen Guangdong Province China

This review summarizes and describes the use of curcumin in diagnosis,prevention,and treatment of Alzheimer＇s *** diagnosis of Alzheimer＇s disease,amyloid-β and highly phosphorylated tau protein are the major *** was developed as an early diagnostic probe based on its natural fluorescence and high binding affinity to amyloid-β.Because of its multi-target effects,curcumin has protective and preventive effects on many chronic diseases such as cerebrovascular disease,hypertension,and *** prevention and treatment of Alzheimer＇s disease,curcumin has been shown to effectively maintain the normal structure and function of cerebral vessels,mitochondria,and synapses,reduce risk factors for a variety of chronic diseases,and decrease the risk of Alzheimer＇s *** effect of curcumin on Alzheimer＇s disease involves multiple signaling pathways：anti-amyloid and metal iron chelating properties,antioxidation and anti-inflammatory ***,there is a scientific basis for the rational application of curcumin in prevention and treatment of Alzheimer＇s disease.

关键词： nerve regeneration curcumin Alzheimer's disease senile dementia early diagnosis positron emission tomography magnetic resonance imaging biological availability chemical components neurodegeneration neural regeneration

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

Localization of five-dimensional Elko spinors on dS/AdS thick branes

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Chinese Physics C 2022年第2期46卷 1-12页

作者： Xiang-Nan Zhou yun-zhi du Xin-Yuan Ma Zhen-Hua Zhao College of Physics and Information Engineering.Shanxi Normal University Linfen 04100China Institute of Theoretical Physics Datong UniversityDatong 037009China Department of Applied Physics Shandong University of Science and TechnologyQingdao 266590China

Owing to the special structure of a five-dimensional Elko spinor,its localization on a brane with codimension one becomes completely different from that of a Dirac *** introducing the coupling between the Elko spinor and the scalar field that can generate the brane,we have two types of localization mechanism for the five-dimensional Elko spinor zero mode on a *** is the Yukawa-type coupling,and the other is the non-minimal *** this study,we investigate the localization of the Elko zero mode on de Sitter and Anti-de Sitter thick branes with the two localization mechanisms,*** results show that both the mechanisms can achieve *** forms of the scalar coupling function in both localization mechanisms have similar properties,and they play a similar role in localization.

关键词： localization Elko spinor de Sitter and Anti-de Sitter thick brane Yukawa-type coupling non-minimal coupling

Phase transition of non-linear charged Anti-de Sitter black holes

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Chinese Physics C 2021年第11期45卷 1-10页

作者： yun-zhi du Huai-Fan Li Fang Liu Ren Zhao Li-Chun Zhang Department of Physics Shan xi Da tong UniversityDatong 037009China Institute of Theoretical Physics Shan xi Da tong UniversityDa tong 037009China

Understanding the thermodynamic phase transition of black holes can provide a deep insight into the fundamental properties of black hole gravity to establish the theory of quantum *** investigate the condition and latent heat of phase transition for non-linear charged AdS black holes using Maxwell's equal-area *** addition,we analyze the boundary and curve of the two-phase coexistence area in the expanded phase *** suggest that the phase transition of the non-linear charged AdS black hole with the fixed temperature(Tduced to study the phase transition and microstructure of black *** this basis,we discuss the continuous phase transition of a non-linear charged AdS black hole to reveal the potential microstructure of a black hole by introducing the order parameter and using the scalar curvature.

关键词： phase transition AdS black hole Ruppeiner scalar curvature microstructure equal-area law

Shadow thermodynamics of non-linear charged Anti-de Sitter black holes

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Chinese Physics C 2022年第12期46卷 16-27页

作者： yun-zhi du Huai-Fan Li Xiang-Nan Zhou Wei-Qi Guo Ren Zhao Institute of Theoretical Physics Shanxi Datong UniversityDatong 037009China College of Physics and Information Engineering Shanxi Normal UniversityTaiYuanChina

It is well known that when vacuum polarization emerges in quantum electrodynamics,the non-linear interaction between electromagnetic fields should be ***,the corresponding field of non-linear electrodynamics can have important effects on black hole *** this work,we focus on the relationship between an observable quantity,that is,the shadow radius,and the first-order phase transition of non-linear charged AdS black holes in the framework of Einstein-power-Yang-Mills *** results show that,under a certain condition,there exists a first-order phase transition from the viewpoint of both the shadow radius and horizon radius,which depend on temperature(or pressure).From the viewpoint of the shadow radius,the phase transition temperature is higher than that from the viewpoint of the horizon radius under the same *** may be due to the non-linear Yang Mills charge and the gravitational *** indicates that the shadow radius can be regarded as a probe to reveal the thermodynamic phase transition information of black *** thermal profiles of coexistent large and small black hole phases when the system is undergoing the phase transition are presented for two different values of the non-linear Yang Mills charge parameter:γ=1,***,the effects of the non-linear Yang Mills charge parameter on the shadow radius and thermal profile are investigated.

关键词： EPYM AdS black hole shadow phase transition

Synthesis of 2,2'-(Substituted Arylmethylene)bis(1,6,6-trimethyl- 6,7,8,9-tetrahydrophenanthro[1,2-b]furan-10,11-dione) Derivatives

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Chinese Chemical Letters 2005年第11期16卷 1451-1454页

作者： Jiang Ke QIN Xian Zhang BU Yu Fang WANG zhi yun du Xing Yuan WANG zhi Shu HUANG Lin MA Lin Kun AN Lian Quan GU School of Pharmaceutical Sciences Sun Yat-sen University Guangzhou 510080 School of Chemistry and Chemical Engineering Sun Yat-sen University Guangzhou 510275

The reactions of tanshinone IIA with aromatic aldehydes have been investigated and several 2, T-（substituted arylmethylene） bis （1,6,6-trimethyl-6,7,8,9-tetrahydrophenanthro[1,2-b]- furan- 10, 11-dione） derivative... 详细信息

关键词： Tanshinone IIA aromatic aldehydes reaction.

Continuous phase transition of the de Sitter spacetime with charged black holes and cloud of strings and quintessence

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Chinese Physics C 2023年第11期47卷 105-115页

作者：甄海龙杜云芝李怀繁李新平张丽春 Department of Physics Shanxi Datong UniversityDatong 037009China Institute of Theoretical Physics Shanxi Datong UniversityDatong 037009China

Recently,some meaningful results have been obtained by studying the phase transition,critical exponents,and other thermodynamical properties of different black *** for the Anti-de Sitter(AdS)black holes,their thermodynamical properties nearby the critical point have attracted considerable ***,there exists little work on the thermodynamic properties of the de Sitter(dS)spacetime with black *** this paper,based on the effective thermodynamical quantities and the method of the Maxwell's equal-area law,we explore the phase equilibrium for the de Sitter spacetime with the charged black holes and the cloud of string and quintessence(i.e.,C-dSSQ spacetime).The boundaries of the two-phase coexistence region in both P_(eff)−T_(eff)and T_(eff)−S diagrams are *** coexistent curve and the latent heat of phase transition for this system are also ***,we analyze the effect of parameters(the state parameterωand the ratio of two horizon radii x=r+/r_(c))on the two-phase coexistence region *** results indicate that the phase transition in C-dSSQ spacetime is analogous to that in a van der Waals fluid(vdw)system,which is determined by the electrical potential at the *** results are helpful for understanding the basic properties of black holes and are also of great value for the establishment of quantum gravity.

关键词： de Sitter spacetime effective thermodynamic quantities phase transition