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Mottness,phase string,and high-T_(c)superconductivity

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chinese Physics B 2022年第8期31卷 37-47页

作者： jing-yu Zhao Zheng-yu Weng Institute for Advanced Study Tsinghua UniversityBeijing 100084China

It is a great discovery in physics of the twentieth century that the elementary particles in nature are dictated by gauge forces,characterized by a nonintegrable phase factor that an elementary particle of charge q acquires from A to B points:P exp(iq/hc∫A^(B)A_(μ)dxμ),where Aμis the gauge potential and P stands for path *** a many-body system of strongly correlated electrons,if the so-called Mott gap is opened up by interaction,the corresponding Hilbert space will be fundamentally changed.A novel nonintegrable phase factor known as phase-string will appear and replace the conventional Fermi statistics to dictate the low-lying *** by the Mott gap,which is clearly identified in the high-Tc cuprate with a magnitude>1.5 e V,such a singular phase factor can enforce a fractionalization of the electrons,leading to a dual world of exotic elementary particles with a topological gauge structure.A non-Fermi-liquid“parent”state will emerge,in which the gapless Landau quasiparticle is only partially robust around the so-called Fermi arc regions,while the main dynamics are dominated by two types of gapped ***,superconductivity,and a Fermi liquid with full Fermi surface can be regarded as the low-temperature instabilities of this new parent *** numerics and experiments provide direct evidence for such an emergent physics of the Mottness,which lies in the core of a high-Tc superconducting mechanism.

关键词： mechanism of high-T_(c)superconductivity doped Mott insulator emergent organizing principle

Oxygen adatoms and vacancies on the (110) surface of CeO2

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Science china(Technological Sciences) 2018年第1期61卷 135-139页

作者： HUANG jingLu yu yunBo ZHU jing yu Rong National Center for Electron Microscopy in Beijing Key Laboratory of Advanced Materials of Ministry of Education of China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing 100084 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Center for Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China University of chinese Academy of Sciences Beijing 100049 China

The behavior of oxygen on ceria surfaces is closely related with the applications of ceria as a catalyst and oxygen conductor in solid-oxide fuel cells. Here, the atomic configurations of oxygen adatoms and vacancies on the(110) surface of CeO_2 have been studied combining aberration-corrected transmission electron microscopy and first-principles calculations. The oxygen adatoms were estimated to be located on top of Ce atoms with 50% coverage, forming a c(2×2) reconstruction. The oxygen vacancies can form stable configuration, with the Ce atoms partly reduced.

关键词： surface structure ceria oxygen adatoms oxygen vacancies aberration-corrected TEM first-principles calculations

A novel diarylheptanoid bearing flavonol moiety from the rhizomes of Alpinia officinarum Hance

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chinese Chemical Letters 2010年第2期21卷 194-196页

作者： Zhao, Ling Liang, jing yu Zhang, jing yu Chen, yun china Pharmaceut Univ Dept Nat Med Chem Nanjing 210009 Peoples R China

A novel diarylheptanoid bearing flavonol moiety,named officinin A(1),along with two known compounds galangin and kaempferide were isolated from the rhizomes of Alpina officinarum *** structure elucidation was accompli... 详细信息

关键词： Alpinia officinarum Hance Diarylheptanoid Officinin A

Synthesis and Crystal Structure of Bisaqua-[N,N'-bis(3,5-dichlorosalicylidene)-1,3-diaminopropano]zinc(II)

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chinese Journal of Structural Chemistry 2006年第9期25卷 1043-1046页

作者： YOU Zhong-Lu HAN Xiao WANG Jia chi jing-yun Department of Chemistry and Chemical Engineering Liaoning Normal University Dalian 116029 China

The title mononuclear zinc（Ⅱ） complex [Zn（BCDP）（H2O）2] （BCDP = N,N＇-bis（3,5dichlorosalicylidene）-1,3-diaminopropane） was prepared and characterized by elemental analysis, 1R spectra and single-crystal X-ray diffraction. The crystal belongs to the orthorhombic system, space group Pnma with a = 7.887（1）, b = 23.788（2）, c = 10.295（4） A, Z= 4, V= 1931.5（8） ,A^3, Dc = 1.786 g/cm^3, Mr = 519.49, λ（MoKa） = 0.71073 A, μ = 1.853 mm^-1, F（000） = 1048, R = 0.0464 and wR = 0.0918. A total of 2273 unique reflections were collected, of which 1570 with 1 〉 2σ（I） were observed. The molecule of the complex has crystallographic mirror symmetry. The Zn atom is sixcoordinated in an octahedral geometry. In the crystal, the molecules are linked through intermolecular O-H…O and O-H…Cl hydrogen bonds, forming chains running along the a axis.

关键词： Schiff base zinc crystal structure hydrogen bond

Tin recovery from a low-grade tin middling with high Si content and low Fe content by reduction–sulfurization roasting with anthracite coal

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International Journal of Minerals,Metallurgy and Materials 2021年第2期28卷 210-220页

作者： jing-cheng Wang Lei Li Yong yu State Key Laboratory of Complex Non-ferrous Metal Resources Clean Utilization Kunming University of Science and TechnologyKunming 650093China Engineering Research Center of Metallurgical Energy Conservation and Emission Reduction of Ministry of Education Kunming University of Science and TechnologyKunming 650093China Faculty of Metallurgical and Energy Engineering Kunming University of Science and TechnologyKunming 650093China

A new method for separating and recovering tin from a low-grade tin middling with high Si content and low Fe content by roasting with anthracite coal was researched by studying the reaction mechanism and performing an industrial test,in which the Sn was sulfurized into SnS(g)and then collected using a dust *** Fe–Sn alloy may be formed at roasting temperatures above 950°C,and like the roasting temperature increases,the Sn content and Sn activity in this Fe–Sn alloy ***,more FeS can be formed at higher temperatures and then the formation of FeO–FeS with a low melting point is promoted,which results in more serious sintering of this low-grade tin *** from the thermodynamics and kinetics points of view,the volatilization of the Sn decreases at extremely high roasting *** results of the industrial test carried out in a coal-fired rotary kiln show that the Sn volatilization rate reaches 89.7%and the Sn is concentrated in the collected dust at a high level,indicating that the Sn can be effectively extracted and recovered from the low-grade tin middling with a high Si content and low Fe content through a reduction–sulfurization roasting process.

关键词： low-grade tin middling tin recovery roasting process Fe-Sn alloy resource recycling

Construction of Polymeric DNA Network and Application for Cell Manipulation

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chinese Journal of Chemistry 2023年第15期41卷 1875-1887页

作者： Lele Chang Rui Zhang jing Wang chi Yao Dayong Yang Frontiers Science Center for Synthetic Biology Key Laboratory of Systems Bioengineering(MOE)Institute of Biomolecular and Biomedical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin300350China

Comprehensive Summary Deoxyribonucleic acid(DNA)is a biomacromolecule,as well as a polymeric material,whose sequences with different manipulative structures enable them to implement a series of functions,such as reorganization,target,and *** to existing traditional materials incapable of multifunctional integration,the polymeric DNA network is a form of material that can achieve functional integration while maintaining specific DNA ***,precise target enabled by DNA network is one of the most essential components of cellular ***,the DNA network is indispensable and irreplaceable to cell manipulation that it is a versatile tool for the understanding of basic laws of living life and treatments of diseases,such as cell isolation,cell delivery,and cell ***,the construction of polymeric DNA network is briefly introduced from the aspects of assembly modules,construction methods,and properties.

关键词： DNA network DNA nanotechnology Cell manipulation Cell isolation and interference

Optimized scheduling of integrated energy systems for low carbon economy considering carbon transaction costs

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Global Energy Interconnection 2024年第4期7卷 377-390页

作者： Chao Liu Weiru Wang jing Li Xinyuan Liu Yongning chi china Electric Power Research Institute Beijing 100192P.R.China State Grid Shanxi Electric Power Research Institute Taiyuan 030001P.R.China

With the introduction of the“dual carbon”goal and the continuous promotion of low-carbon development,the integrated energy system(IES)has gradually become an effective way to save energy and reduce *** study proposes a low-carbon economic optimization scheduling model for an IES that considers carbon trading *** the goal of minimizing the total operating cost of the IES and considering the transferable and curtailable characteristics of the electric and thermal flexible loads,an optimal scheduling model of the IES that considers the cost of carbon trading and flexible loads on the user side was *** role of flexible loads in improving the economy of an energy system was investigated using examples,and the rationality and effectiveness of the study were verified through a comparative analysis of different *** results showed that the total cost of the system in different scenarios was reduced by 18.04%,9.1%,3.35%,and 7.03%,respectively,whereas the total carbon emissions of the system were reduced by 65.28%,20.63%,3.85%,and 18.03%,respectively,when the carbon trading cost and demand-side flexible electric and thermal load responses were considered *** electrical and thermal loads did not have the same impact on the system *** the analyzed case,the total cost and carbon emissions of the system when only the flexible electrical load response was considered were lower than those when only the flexible thermal load response was taken into *** have an excess of carbon trading credits and can profit from selling them,whereas other devices have an excess of carbon trading and need to buy carbon credits.

关键词： Demand response Combined cooling Heating and power system Carbon transaction costs Flexible electric and thermal loads Optimal scheduling

Risk factors of recurrent choledocholithiasis following therapeutic endoscopic retrograde cholangiopancreatography

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Hepatobiliary & Pancreatic Diseases International 2023年第3期22卷 282-287页

作者： Lin Li jing Wang Cheng-Cheng Tong chi-Yi He Department of Gastroenterology The First Affiliated Hospital of Wannan Medical CollegeWuhu 241001China

Background:The risk factors for the recurrent choledocholithiasis after endoscopic retrograde cholangiopancreatography(ERCP)have not been well *** aim of this study was to explore the risk factors of recurrent ***:We carried out a retrospective analysis of data collected between January 1,2010 and January 1,*** analysis and multivariate analysis were used to explore the independent risk factors of recurrent choledocholithiasis following therapeutic ***:In total,598 patients were eventually selected for analysis,299 patients in the recurrent choledocholithiasis group and 299 patients in the control *** overall rate of recurrent choledocholithiasis was 6.91%.Multivariate analysis showed that diabetes[odds ratio(OR)=3.677,95%confidence interval(CI):1.875-7.209;P<0.001],fatty liver(OR=4.741,95%CI:1.205-18.653;P=0.026),liver cirrhosis(OR=3.900,95%CI:1.358-11.201;P=0.011),history of smoking(OR=3.773,95%CI:2.060-6.908;P<0.001),intrahepatic bile duct stone(OR=4.208,95%CI:2.220-7.976;P<0.001),biliary stent(OR=2.996,95%CI:1.870-4.800;P<0.001),and endoscopic papillary balloon dilation(EPBD)(OR=3.009,95%CI:1.921-4.715;P<0.001)were independent risk factors of recurrent ***,history of drinking(OR=0.183,95%CI:0.099-0.337;P<0.001),eating light food frequently(OR=0.511,95%CI:0.343-0.760;P=0.001),and antibiotic use before ERCP(OR=0.315,95%CI:0.200-0.497;P<0.001)were independent protective factors of recurrent ***:Patients with the abovementioned risk factors are more likely to have recurrent CBD *** who eat light food frequently and have a history of drinking are less likely to present with recurrent CBD calculi.

关键词： Recurrence Choledocholithiasis Endoscopic retrograde cholangiopancreatography

Constraints on the Genesis of the Qixiashan Pb-Zn Deposit, Nanjing: Evidence from Sulfide Trace Element Geochemistry

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Journal of Earth Science 2020年第2期31卷 287-297页

作者： Xuejuan Sun Pei Ni yulong Yang Zhe chi Shan jing State Key Laboratory for Mineral Deposit Research Institute of Geo-FluidsSchool of Earth Science and EngineeringNanjing UniversityNanjing 210023China East china Mineral Exploration and Development Bureau of Nonferrous Metal Jiangsu ProvinceNanjing 210007 China School of Geosciences Chengdu University of TechnologyChengdu 610059China

The large-scale Qixiashan Pb-Zn Deposit in the eastern Middle-Lower Yangtze metallogenic belt is hosted in carbonate *** on a detailed mineral paragenesis study,in-situ LA-ICP-MS(laser ablation inductively coupled plasma mass spectrometer)trace element geochemistry data for pyrite and sphalerite from different stages in the Qixiashan Deposit are reported,the Pb-Zn mineralization processes are reconstructed,and a genetic model is *** paragenetic stages of Pb-Zn ore deposition are identified:the biogenic pyrite mineralization stage(Stage 1),the early stage of hydrothermal Pb-Zn mineralization(Stage 2),the late stage of hydrothermal Pb-Zn mineralization(Stage 3),and the carbonate stage(Stage 4).Stages 2 and 3 are the main ore *** trace element characteristics of the sulfide in stages 2 and 3,such as the higher Co/Ni and lower trace element contents of the pyrite and the Fe,Mn,and Ge contents of the sphalerite,indicate that they were generated by magmatic-hydrothermal ***,the lower Cu,Ag,Sb,and Pb contents of the pyrite and sphalerite of Stage 3 compared to Stage 2 suggest an increase in magmatic-hydrothermal activity from Stage 2 to Stage *** hydrothermal fluids leached trace elements(e.g.,Cu,Ag,Sb,and Pb)from the previously deposited primary pyrite and sphalerite,which were precipitated in the later hydrothermal stage Cu,Au,Ag,Sb,and Pb bearing minerals and secondary pyrite and sphalerite with lower trace element contents(e.g.,Cu,Au,Ag,Sb,and Pb).Compared with the pyrite from stages 2 and 3,the Stage 1 pyrite has relatively higher trace elements contents(Sb,Cu,Zn,Au,Ag,Pb,As,and Ni).However,their lower Co/Ni ratio suggests a syngenetic sedimentary *** on the petrographic features and trace element data,a multi-stage mineralization model is *** Stage 1 biogenic pyrite formed stratiform pyrite layers,which provided reducing conditions and a base for the subsequent Pb-Zn *** Stage 2,subse

关键词： sulfides trace elements superimposed mineralization Qixiashan Pb-Zn Deposit