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Polarization reversal via a transient relaxor state in nonergodic relaxors near freezing temperature

Journal of Materiomics 2019年第4期5卷 634-640页

作者： chang-Hyo Hong Hanzheng Guo Xiaoli tan John E.Daniels Wook Jo School of Materials Science and Engineering Ulsan National Institute of Science and TechnologyUlsan44919Republic of Korea Department of Materials Science and Engineering Iowa State UniversityAmesIA50011USA School of Materials Science and Engineering University of New South WalesNew South Wales2052Australia

Among the unresolved issues in the study of relaxor ferroelectrics is the role of freezing temperature,across which the dynamics of polarization reversal in relaxor ferroelectrics *** presence of this freezing temperature is best manifested by the appearance of a double polarization hysteresis loop just above the freezing *** that the polarization pinching evolving into a double hysteresis starts well below the freezing temperature,there exists a transient temperature regime between the nonergodic and the ergodic relaxor *** clarify the role of the freezing temperature on the pinching,the polarization reversal near the freezing temperature of relaxor(Pb_(1-x)La_(x))(Zr_(1-y)t_(y))_(1-x/4)O_(3)(PLZt)was monitored using three in situ electric field methods:electrocaloric effect,neutron diffraction,and transmission electron *** demonstrate that the pinching results from a two-step process,1)domain detexturization in the ferroelectric state and 2)miniaturization of *** observation explains the recently reported gap between the depolarization temperature t_(d) and the ferroelectric-torelaxor transition temperature t_(F-R) in lead-free *** further show that t_(d) and t_(F-R),which have long been considered identical in lead-based relaxors,are not the *** current study suggests that the mismatch between t_(d) and tF-R is an inherent feature in both lead-based and lead-free relaxor ferroelectrics.

关键词： Relaxor Nanodomains In situ Neutron diffraction transmission electron microscopy

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Lithospheric thinning and ignition of a Cordilleran magmatic flare-up:Geochemical and O-Hf isotopic constraints from Cretaceous plutons in southern Korea

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Geoscience Frontiers 2023年第1期14卷 327-345页

作者： Albert chang-sik Cheong Min-Ji Jung Hui JeJo Jeongmin Kim Shinae Lee youn-Joong Jeong Korea Basic Science Institute Ochang Center Cheongju 28119Republic of Korea Graduate School of Analytical Science and technology Chungnam National UniversityDaejeon 34134Republic of Korea Korea Institute of Geoscience and Mineral Resources Daejeon 34132Republic of Korea

Northeast Asian continental margins contain the products of magma emplacement driven by prolonged subduction of the(paleo-)Pacific *** observed in many Cordilleran arcs,magmatic evolution in this area was punctuated by high-volume pulses amid background *** present study investigates the early evolution of the Cretaceous magmatic flare-up using new and published geochronological,geochemical,and O-Hf isotope data from plutonic rocks in the southern Korean *** a long(~50 m.y.)magmatic hiatus and the development of the Honam Shear Zone through flat-slab subduction,the Cretaceous flare-up began with the intrusion of monzonites,granodiorites,and granites in the inboard Gyeonggi Massif and the intervening Okcheon *** to Jurassic granitoids formed during the former flare-up,Albian(~111 Ma)monzonites found in the Eopyeong area of the Okcheon Belt have distinctly higher zirconε_(Hf)(t)(-7.5±1.3)andδ^(18)O(7.78‰±0.25‰)values and lower wholerock La/yb and Sr/y *** voluminous coeval granodiorite and granite plutons in the Gyeonggi Massif are further reduced in Sr/y and to a lesser extent,in La/yb,and have higher zirconε_(Hf)(t)values(-13 to-19)than the Precambrian basement(ca.-30).these chemical and isotopic features indicate that Early Cretaceous lithospheric thinning,most likely resulting from delamination of tectonically and magmatically overthickened lithospheric keel that was metasomatized during prior subduction episodes,and consequent asthenospheric upwelling played vital roles in igniting the magmatic *** O-Hf isotopic ranges of synmagmatic zircons from the Albian plutons and their Paleoproterozoic and Jurassic inheritance attest to the involvement of lithospheric mantle and crustal basement in magma generation during this decratonization *** magmatism then migrated trenchward and culminated in the Late Cretaceous,yielding widespread granitoid rocks emplaced at shallow crustal *** early Late Cretaceous(94-8

关键词： Cordilleran arc Cretaceous flare-up Korean Peninsula Lithospheric thinning Crustal rejuvenation

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Future Physics Programme of BESⅢ

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Chinese Physics C 2020年第4期44卷 I0001-I0004,1-102页

作者： M.Ablikim M.N.Achasov P.Adlarson S.Ahmed M.Albrecht M.Alekseev A.Amoroso F.F.An Q.An y.Bai O.Bakina R.Baldini Ferroli y.Ban K.Begzsuren J.V.Bennett N.Berger M.Bertani D.Bettoni F.Bianchi J Biernat J.Bloms I.Boyko R.A.Briere L.Calibbi H.Cai X.Cai A.Calcaterra G.F.Cao N.Cao S.A.Cetin J.Chai J.F.chang W.L.chang J.Charles G.Chelkov Chen G.Chen H.S.Chen J.C.Chen M.L.Chen S.J.Chen y.B.Chen H.y.Cheng W.Cheng G.Cibinetto F.Cossio X.F.Cui H.L.Dai J.P.Dai X.C.Dai A.Dbeyssi D.Dedovich Z.y.Deng A.Denig Denysenko M.Destefanis S.Descotes-Genon F.De Mori y.Ding C.Dong J.Dong L.y.Dong M.y.Dong Z.L.Dou S.X.Du S.I.Eidelman J.Z.Fan J.Fang S.S.Fang y.Fang R.Farinelli L.Fava F.Feldbauer G.Felici C.Q.Feng M.Fritsch C.D.Fu y.Fu Q.Gao X.L.Gao y.Gao y.Gao y.G.Gao Z.Gao B.Garillon I.Garzia E.M.Gersabeck A.Gilman K.Goetzen L.Gong W.X.Gong W.Gradl M.Greco L.M.Gu M.H.Gu y.t.Gu A.Q.Guo F.K.Guo L.B.Guo R.P.Guo y.P.Guo A.Guskov S.Han X.Q.Hao F.A.Harris K.L.He F.H.Heinsius t.Held y.K.Heng y.R.Hou Z.L.Hou H.M.Hu J.F.Hu t.Hu y.Hu G.S.Huang J.S.Huang X.t.Huang X.Z.Huang Z.L.Huang N.Huesken t.Hussain W.Ikegami Andersson W.Imoehl M.Irshad Q.Ji Q.P.Ji X.B.Ji X.L.Ji H.L.Jiang X.S.Jiang X.y.Jiang J.B.Jiao Z.Jiao D.P.Jin S.Jin y.Jin t.Johansson N.Kalantar-Nayestanaki X.S.Kang R.Kappert M.Kavatsyuk B.C.Ke I.K.Keshk t.Khan A.Khoukaz P.Kiese R.Kiuchi R.Kliemt L.Koch O.B.Kolcu B.Kopf M.Kuemmel M.Kuessner A.Kupsc M.Kurth M.G.Kurth W.Kuhn J.S.Lange P.Larin L.Lavezzi H.Leithoff t.Lenz C.Li Cheng Li D.M.Li F.Li F.y.Li G.Li H.B.Li H.J.Li J.C.Li J.W.Li Ke Li L.K.Li Lei Li P.L.Li P.R.Li Q.y.Li W.D.Li W.G.Li X.H.Li X.L.Li X.N.Li X.Q.Li Z.B.Li H.Liang H.Liang y.F.Liang y.t.Liang G.R.Liao L.Z.Liao J.Libby C.X.Lin D.X.Lin y.J.Lin B.Liu B.J.Liu C.X.Liu D.Liu D.y.Liu F.H.Liu Fang Liu Feng Liu H.B.Liu H.M.Liu Huanhuan Liu Huihui Liu J.B.Liu J.y.Liu K.y.Liu Ke Liu Q.Liu S.B.Liu t.Liu X.Liu X.y.Liu y.B.Liu Z.A.Liu Zhiqing Liu y.F.Long X.C.Lou H.J.Lu J.D.Lu J.G.Lu y.Lu y.P.Lu C.L.Luo M.X.Luo P.W.Luo t.Luo X.L.Luo S.Lusso X.R.Lyu F.C.Ma H.L.Ma L.L.Ma M.M.Ma Q.M.Ma X.N.Ma X.X. Institute of High Energy Physics Beijing 100049China Beihang University Beijing 100191China Beijing Institute of Petrochemical technology Beijing 102617China Bochum Ruhr-University D-44780 BochumGermany Carnegie Mellon University PittsburghPennsylvania 15213USA Central China Normal University Wuhan 430079China China Center of Advanced Science and technology Beijing 100190China COMSAtS University Islamabad Lahore CampusDefence RoadOff Raiwind Road54000 LahorePakistan Fudan University Shanghai 200443China G.I.Budker Institute of Nuclear Physics SB RAS(BINP) Novosibirsk 630090Russia GSI Helmholtzcentre for Heavy Ion Research GmbH D-64291 DarmstadtGermany Guangxi Normal University Guilin 541004China Guangxi University Nanning 530004China Hangzhou Normal University Hangzhou 310036China Helmholtz Institute Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Henan Normal University Xinxiang 453007China Henan University of Science and technology Luoyang 471003China Huangshan College Huangshan 245000China Hunan Normal University Changsha 410081China Hunan University Changsha 410082China Indian Institute of technology Madras Chennai 600036India Indiana University BloomingtonIndiana 47405USA INFN Laboratori Nazionali di Frascati I-00044FrascatiItaly INFN Sezione di Ferrara I-44122FerraraItaly Institute of Physics and technology Peace Ave.54BUlaanbaatar 13330Mongolia Johannes Gutenberg University of Mainz Johann-Joachim-Becher-Weg 45D-55099 MainzGermany Joint Institute for Nuclear Research 141980 DubnaMoscow regionRussia Justus-Liebig-Universitaet Giessen II.Physikalisches InstitutHeinrich-Buff-Ring 16D-35392 GiessenGermany KVI-CARt University of GroningenNL-9747 AA GroningenThe Netherlands Lanzhou University Lanzhou 730000China Liaoning University Shenyang 110036China Nanjing Normal University Nanjing 210023China Nanjing University Nanjing 210093China Nankai University Tianjin 300071China Peking University Beijing 100871China Shandong University Jinan 250100China Shanghai

there has recently been a dramatic renewal of interest in hadron spectroscopy and charm physics. this renaissance has been driven in part by the discovery of a plethora of charmonium-like XyZ states at BESⅢ and B factories, and the observation of an intriguing proton-antiproton threshold enhancement and the possibly related X(1835) meson state at BESⅢ, as well as the threshold measurements of charm mesons and charm baryons. We present a detailed survey of the important topics in tau-charm physics and hadron physics that can be further explored at BESⅢ during the remaining operation period of BEPCⅡ. this survey will help in the optimization of the data-taking plan over the coming years, and provides physics motivation for the possible upgrade of BEPCⅡ to higher luminosity.

关键词： meson hadron optimization

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COUPLING ANALySES OF FRAGILE ECO-ENVIRONMENt IN tHE WESt OF tHE SONGNEN PLAIN

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Chinese Geographical Science 2001年第3期11卷 61-67页

作者： chang-chun Song Wei Deng Xin-shan Song Zhao-qing Luan changchun Institute of Geography the Chinese Academy of Sciences Changchun P. R. China

the fragile eco-environment is a special type of ecosystem,its response to the change of environmental condi -tions is very *** it is rather prone to be disturbed under unfav orable *** activity h as greatly changed the geo-chemical process in the ecosystem,thus caused a series o f positive and negative *** t he ecosys-tem,especially in the fragile eco-e nvironment,different systems and r egimes are interconnected and *** the suntainable development of ecosystem and the protection and rational utilization of resources,it is of great impor-tance to study these internal relati onships and seek rational regulatio n and control *** paper tak es the fragile eco-environment in the west of the Songnen Plain as an *** on th e study of the topograph,physiognom y,soil,vegetation and their geographic distribution in the landscape,th e paper explains the structure of the ecologic land-scape and quantifies the ecologic ge o-chemical processes under differe nt landscape *** additio n,the paper al-so tries making coupling analyses of the ecologic succession and the landscape geochemical *** in the pa-per,some research results are given.

关键词： west of the Songnen Plain fragile eco-environment ecologic structure coupling of ecologic factors

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Effect of oxygen enrichment on sintering behavior of high proportion vanadium-titanium magnesite concentrates

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Journal of Iron and Steel Research International 2023年第11期30卷 2122-2132页

作者： Shi-hong Peng Hao Liu Ze-zheng Sun chang-wei Li yue-lin Qin Wei-qiang Liu Guang Wang School of Metallurgy and Materials Engineering Chongqing University of Science and TechnologyChongqing401331China Value-Added Process and Clean Extraction of Complex Metal Mineral Resources Chongqing Municipal Key Laboratory of Institutions of Higher EducationChongqing401331China Chongqing Chuanyi Automation Co. Ltd.Chongqing401120China Process and Systems Engineering Åbo Akademi UniversityÅbo20500Finland Department of Materials Science and Engineering McMaster UniversityOntarioL8S 4L7Canada

to achieve high-efficiency utilization of complex and unmanageable iron-containing minerals,the effects of oxygen enrichment on productivity,yield,flame front speed,exhaust gas peak temperature,and desulphurization reaction of the vanadium-titanium magnetite sintering process as well as sinter tumble index and mineralogy were clarified,with oxygen enrichment concentrations ranging from 21 to 29 vol.%.Results indicated that with increasing the oxygen enrichment concentration from 21 to 27 vol.%,the flame front speed increased from 30.3 to 40.0 mm min^(-1),the yield enhanced from 72%to 77%,and the productivity augmented from 1.83 to 2.67t m^(-2)h^(-1);in the meantime,the tumble index was improved from 73.7%to 77.9%,and the exhaust gas peak temperature rose from 376.4 to 484.8℃.the main reason for the improvement in sintering properties was the increased combustibility of fuels and the generation of proper liquid phase that improved the permeability of the packed *** improved sinter strength is mainly due to the increase in the phase fraction of silico-ferrites of calcium and *** addition,oxygen enrichment sintering could significantly increase the desulphurization level of vanadium-titanium magnetite sinter and the rate of desulphurization reaction during sintering process.

关键词： Sinter Oxygen enrichment Vanadium-titanium magnetite Sintering behavior

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Air exposure towards stable Li/Li_(10)GeP_(2)S_(12) interface for all-solid-state lithium batteries

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Materials Futures 2022年第2期1卷 1-8页

作者： Wei Weng Dong Zhou Gaozhan Liu Lin Shen Mengqi Li Xinshuang chang Xiayin yao Ningbo Institute of Materials technology and Engineering Chinese Academy of SciencesNingbo 315201People’s Republic of China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049People’s Republic of China

Moist air is a great challenge for manufacturing sulfide-based all-solid-state lithium batteries as the water in air will lead to severe decomposition of sulfide electrolytes and release H2S ***,different with direct reaction with water,short-period air exposure of Li_(10)GeP_(2)S_(12) sulfide electrolyte with controlled humidity can greatly enhance the stability of Li_(10)GeP_(2)S_(12) against lithium metal,thus realizing stable Li_(10)GeP_(2)S_(12) based all-solid-state lithium metal *** air exposure,partial hydrolysis reaction occurs on the surface of Li_(10)GeP_(2)S_(12) pellets,rapidly generating a protective decomposition layer of Li4P2S6,GeS2 and Li2HPO3 in dozens of *** ionically conductive but electronically insulation protecting layer can effectively prevent the severe interface reaction between Li_(10)GeP_(2)S_(12) and lithium metal during electrochemical *** Li/40s-air-exposed Li_(10)GeP_(2)S_(12)/Li cell shows long cycling stability for 1000 *** the LiCoO_(2)/40s-air-exposed Li_(10)GeP_(2)S_(12)/Li batteries present good rate capability and long cyclic performances,showing capacity retention of 80%after 100 cycles.

关键词： Li_(10)GeP_(2)S_(12) lithium metal interface stability air-exposure treatment all-solid-state lithium batteries

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Coordination cage with structural “defects” and open metal sites catalyzes selective oxidation of primary alcohols

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Science China Chemistry 2023年第6期66卷 1714-1721页

作者： tian-Pu Sheng ying Wei Parvathi Jampani chang Li Feng-Rong Dai Shuping Huang Zhenqiang Wang Zhong-Ning Chen State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou 350002China College of Chemistry Fuzhou UniversityFuzhou 350108China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry&Center for Fluorinated Functional Materials University of South DakotaVermillionSDUSA

Coordination cages with intrinsic enzyme-like activity are a class of promising catalysts for improving the efficiency of organic *** present herein a viable strategy to conveniently construct multimetallic active sites into a coordination cage via self-assembly of a pre-formed sulfonylcalix[4]arene-based tetranuclear copper(II)precursor and an amino-functionalized dicarboxylate *** cage exhibits a“defective”,partially open cylindrical structure and features coordinatively labile dimetallic Cu(II)*** by this unique inner cavity environment,promising catalytic activity toward selective oxidation of primary alcohols to carboxylic acids at room temperature is *** studies reveal that the coordinatively labile dimetallic Cu(II)sites can efficiently capture and activate the substrate and oxidant to catalyze the reaction,while the confined nano-cavity environment modulates substrate binding and enhances the catalytic *** study provides a new approach to designing biomimetic multifunctional coordination cages and environmentally friendly supramolecular catalysts.

关键词： coordination cages open metal sites alcohol oxidation host-guest systems supramolecular chemistry

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Integrated bioinformatics analysis identifies immune-related epithelial-mesenchymal transition prognostic biomarkers and immune infiltrates in patients with lung adenocarcinoma

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Oncology and translational Medicine 2023年第5期9卷 225-233页

作者： yu Huang Peng Zhang Shu-chang Zhou Qing-Xu Liu Department of Oncology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina Department of Radiology Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina

Background:Lung cancer,particularly lung adenocarcinoma(LUAD),is highly *** the critical interaction between epithelial-mesenchymal transition(EMt)and the immune status of patients is imperative for clinical ***:We conducted bioinformatics analysis to identify potential immune-related EMt(iEMt)prognostic genes and explored the immune status in *** data from the CancerGenome Atlas andGSE68465,differentially expressed genes,were identified,and a risk modelwas *** analysis was conducted using the Gene Ontology and Kyoto Encyclopedia of Genes and Genomes ***:Our findings revealed 69 differentially expressed iEMt genes,with risk values demonstrating independent prognostic significance for both the Cancer Genome Atlas and GSE68465 *** risk value was positively correlated with tumor *** cell infiltration analysis showed a significant decrease in resting dendritic cells and an increase in CD4 memory t cells in high-risk groups with poor survival *** immunotherapy analysis revealed weak immunotherapeutic effects in the high-risk ***:this study provides insights into potential aberrant differential iEMt genes and risk models and explores immune landscapes that inform personalized immunotherapy in patients with LUAD.

关键词： Immune cell infiltration Immune-related EMt genes Lung adenocarcinoma Prognosis tumor immune microenvironment

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灭幼脲引起两种幼虫表皮组织病变的显微观察

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昆虫学报 1988年第4期31卷 366-370页

作者：任久长马燕张宗炳北京大学生物系北京大学生物系北京

本文研究了灭幼脲引起黄粉(虫甲)(tenebrio mclitor)和粘虫(Mythimna separata)幼虫的中毒征象和组织学病变。低剂量能引起幼虫蜕皮障碍,但看不到明显的组织学病变。高剂量处理,不仅引起了严重的中毒征象,而且伴有明显的组织学病变:内... 详细信息

本文研究了灭幼脲引起黄粉(虫甲)(tenebrio mclitor)和粘虫(Mythimna separata)幼虫的中毒征象和组织学病变。低剂量能引起幼虫蜕皮障碍,但看不到明显的组织学病变。高剂量处理,不仅引起了严重的中毒征象,而且伴有明显的组织学病变:内表皮生长停滞,真皮细胞排列异常,在内表皮和真皮细胞之间出现附加层和球状颗粒。对这些现象进行了较细致的讨论。

关键词：黄粉(虫甲) 粘虫灭幼脲组织病变表皮

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Spin direction dependent quantum anomalous Hall effect in two-dimensional ferromagnetic materials

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Chinese Physics B 2024年第4期33卷 613-621页

作者：杨宇贤张昌文 School of Physics and technology University of JinanJinan 250022China

We propose a scheme for realizing the spin direction-dependent quantum anomalous Hall effect(QAHE)driven by spin-orbit couplings(SOC)in two-dimensional(2D)*** on the sp^(3)tight-binding(tB)model,we find that these systems can exhibit a QAHE with out-of-plane and in-plane magnetization for the weak and strong SOC,respectively,in which the mechanism of quantum transition is mainly driven by the band inversion of p_(x,y)/p_(z)*** a concrete example,based on first-principles calculations,we realize a real material of monolayer 1t-SnN_(2)/PbN_(2)exhibiting the QAHE with in-plane/out-of-plane magnetization characterized by the nonzero Chern number C and topological edge *** findings provide useful guidance for the pursuit of a spin direction-dependent QAHE and hence stimulate immediate experimental interest.

关键词： topological phase transition quantum anomalous Hall effect first-principles calculations

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