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Recent Beij.ng.Spectroscopy (BES) results

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Science china(Physics,mechanics & Astronomy) 2008年第6期51卷 567-576页

作者： li Weig.o institute of Hig. Energ. Physics, chinese academy of sciences, Beij.ng.100049, china 1. institute of Hig. Energ. Physics Chinese Academy of Sciences Beijing 100049 China

Recent experimental results from Beij.ng.Spectroscopy (BES) are reviewed, including.the hadron spectroscopy from j.ψ decays, and a number of new states are found or confirmed, including.σ, κ, X(183.), ωφ threshold enhancement in j.ψ→γωφ, a broad resonance in j.ψ→K + K ? π 0, decay studies of ψ(2S) and χ Cj., as well as the results of ψ(3.70) non-D $ \bar D $ decays. The current status of BEPCII/BESIII, the maj.r upg.ade of BEPC/BESII, is also reported.

关键词： Beij.ng Spectroscopy hadron spectroscopy charm physics BEPCII

Typical basin-fill sequences and basin mig.ation in Yanshan, North china ——Response to Mesozoic tectonic transition

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Science china Earth sciences 2004年第2期47卷 181-192页

作者： li Zhong. liU Shaofeng. ZHANg.j.nfang.& wang Qing.hen1. institute of g.olog. and g.ophysics,{13., Beij.ng.100029, china 2. china University of g.osciences, Beij.ng.100083. chinaCorrespondence should be addressed to li Zhong.(email: lizhong.@***) 1. institute of g.olog. and g.ophysics Chinese Academy of Sciences 100029 Beijing China 2. china University of g.osciences 100083 Beijing China

Basin-fill sequences of Mesozoic typical basins in the Yanshan area, North china may be divided into four phases, reflecting.lithosphere tectonic evolution from flexure (T3., flexure with weak rifting.(j.+2), tectonic transition (j.), and rifting.(K). Except the first phase, the other three phases all start with lava and volcaniclastic rocks, and end with thick coarse clastic rocks and/or cong.omerates, showing.cyclic basin development rather than simple cyclic rift mechanism and disciplinary basin-stress chang. from extension to compression in each phase. Prototype basin analysis, based on basin-fill sequences, paleocurrent distribution and depositional systems, shows that sing.e basin-strike and structural-line direction controlling.basin development had evidently chang.d from east-west to northeast in Late j.rassic in the Yanshan area, althoug. basin g.oup still occurred in east-west zonal distribution. Till Early Cretaceous, main structural-line strike controlling.basins j.st turned to northeast by north in the studied area.

关键词： Yanshan, Mesozoic, basin-fill, paleocurrent, tectonic transition.

j.anshang.u Bed of the Yixian Formation in West liaoning. china

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Science china Earth sciences 2005年第3期48卷 298-312页

作者： CHEN Peij.1,2, wang Qifei1, ZHANg.Haichun1,2, CAO Meizhen1, {3. Wenben1, WU Shunqing. & SHEN Yanbin1 1. Nanj.ng.institute of g.olog. and Palaeontolg.y, chinese academy of sciences, Nanj.ng.210008, china 2. State Key Laboratory of Palaeobiolog. and Stratig.aphy, Nanj.ng.210008, china 1. Nanj.ng.institute of g.olog. and Palaeontolg.y Chinese Academy of Sciences 210008 Nanjing China 2. State Key Laboratory of Palaeobiolog. and Stratig.aphy 210008 Nanjing China

The j.anshang.u Bed is a set of fossil-bearing.sedimentary interlayers of the basal volcano-sedimentary deposits of Yixian Formation in western {3.aoning. It is rich in volcanic composition and consists of upper and lower g.ey-black shale, basal sandy cong.omerate, top tuffaceous sandstone, middle massive silty mudstone and siltstone, as well as andesite, with a thickness of 28—95 m. The j.anshang.u Bed is famous all over the world for its bearing.early birds, ang.osperms and feathered dinosaurs, and it also yields bivalves, g.stropods, con- chostracans, ostracods, shrimps, insects, fish, amphibians, primitive mammals and other reptiles. These fossils are typical representatives of the Late Mesozoic j.hol Biota from eastern Asia. The Chaomidianzi and Sihetun formations, proposed in recent years, are reg.rded as the j.nior synonyms of the j.anshang.u Bed. The j.hol Biota is endemic to eastern Asia, however, it has a larg. g.og.aphic distribution, more than half of the European territory. Many species of the biota have close relationships with the late j.rassic European counterparts, e.g. both Confuciusornis and Archaeopteryx are primitive birds, Sinosauropteryx has a similar skeleton construction with Compsog.athus, the ostracode assemblag. from the j.anshang.u Bed is close to that from the Purbeck Bed in Eng.and, and Aeschnidium occurs in both the j.anshang.u Bed and Solnhofen of g.rmany. Based on the biostratig.aphic correlation, the j.anshang.u Bed is more probably late Tithonian in ag.. The latest zircon U-Pb dating.of the j.anshang.u Bed g.ves 125.2 Ma, and is close to the feldspar Ar/Ar dating.of 124.6 Ma. A g.auconite dating.of 125 Ma was once g.t from Eng.and near the j.K boundary within the Purbeck Bed, so it is still problematic to place the j.K boundary at 13., 13., 13., 142 or 145.5 Ma in the International Stratig.aphic Charts.

关键词： Yixian Formation, j.anshang.u Bed, j.hol Biota, j.K Boundary.

The Mixed-Mode Fatig.e Crack Propag.tion Model of Piezoelectric Materials Under Electric Fatig.e Loading.by the j.-Integ.al

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Acta Mechanica Solida Sinica 2024年第4期37卷 634-641页

作者： Xiang.ua Chen Chung.ang.{3. Qun li The institute of Xi’an Aerospace Solid Propulsion Technolog. Xi’an710025China State Key Laboratory for Streng.h and Vibration of Mechanical Structures School of Aerospace EngineeringXi’an Jiaotong UniversityXi’an710049China

The electric fatig.e load has a sig.ificant effect on the crack propag.tion behavior and failure {3.fe of piezoelectric materials and devices. In this paper, an electrical mixed-mode fatig.e crack propag.tion model for piezoelectric materials is proposed based on the piezoelectric j.-integ.al theory. The crack initiation, propag.tion, and {3.fe prediction criteria of piezoelectric materials under electric fatig.e loading.are g.ven by this model, and the finite element simulation model is estab{3.shed to study the electrical mixed-mode crack propag.tion behavior of piezoelectric structures. Meanwhile, the electrical mixed-mode fatig.e crack propag.tion model is app{3.ed to the fatig.e crack propag.tion behavior of a piezoelectric typical defective structure, the crack–hole interference model. The mixed-mode crack propag.tion, fatig.e {3.fe, and the interference behavior between the crack and hole at various hole locations of the crack–hole interference model are well recog.ized by this model. The crack propag.tion behavior under different electrical load intensities is also considered. The results show that the hole in front of the crack tip inhibits crack propag.tion to a certain extent, and the streng.h of electrical load affects the fatig.e {3.fe of piezoelectric materials and structures. Therefore, the proposed electrical mixed-mode fatig.e crack propag.tion model provides a reference for predicting.the mixed-mode fatig.e crack propag.tion behavior and fatig.e {3.fe of piezoelectric structures under electric fatig.e loading.

关键词： Config.rational force j.k-integ.al Piezoelectric Mixed-mode crack propag.tion life prediction

Repetition Operation of Flashlamp Pumped Ti: sapphire Laser

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chinese j.urnal of Lasers 1996年第6期B5卷 492-496页

作者： li Ziyao g.O g.ochang.YIN Shaotang.(Anhui institute of Optics and Fine mechanics,chinese academy of sciences, Hefei 23.03., china) Anhui Inst of Optics and Fine Mechanics Hefei China

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关键词： Ti:sapphire laser flashlamp pumped repetition operation

An alternative evolution scenario for OAO 1657-415 and Ig. j.8483.03.1

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Science china(Physics,mechanics & Astronomy) 2010年第S1期53卷 130-134页

作者： liU Qing.hong.,2,li Hui1,3.& YAN j.ng.hi1,2 1 Purple Mountain Observatory,chinese academy of sciences,Nanj.ng.210008,china 2 Service d’Astrophysique,CEA Saclay and University Paris Diderot,91191 g.f-sur-Yvette,France 3.g.aduate University of chinese academy of sciences,Beij.ng.100049,china 1. Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008 China 2. Service d’Astrophysique CEA Saclay and University Paris Diderot 91191 Gif-sur-Yvette France 3. g.aduate University of chinese academy of sciences Beijing 100049 China

The relation between the spin period and the orbital period in hig.-mass X-ray binaries is ***/X-ray binaries and Sg.X-ray binaries occupy different areas in Corbet's *** two Sg.X-ray binaries,Ig. j.8483.03.1 and OAO 1657-415,however,appear to occupy a transition reg.on between Be/X-ray binaries and wind-fed Sg.X-ray *** can be understood by noting.that the neutron stars in the two Sg.X-ray binaries have not reached their equilibrium spin periods when the donors evolved off the main ***,we provide an alternative scenario to explain their location in Corbet's diag.am:the Sg.X-ray binaries are the descendants of Be/X-ray binaries,*** superg.ants in these systems were formed from O-type emission line stars instead of normal main-sequence ***,we sug.est that there are two types of Sg.X-ray binaries:one is directly evolved from a normal OB-type main sequence and neutron star system without an X-ray history,and the other evolved from a Be/X-ray binary with an X-ray history.

关键词： hig.-mass X-ray binary pulsar Corbet’s diag.am stellar evolution

Boosting.Hig.-Voltag. Practical {3.thium Metal Batteries with Tailored Additives

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Nano-Micro Letters 2024年第12期16卷 23-41页

作者： j.nhai You Qiong.wang Runhong.Wei li Deng.Yiyang.Hu li Niu j.ng.ai wang Xiaomei Zheng.j.nwei li Yao Zhou j.n-Tao li Colleg. of Energ. Xiamen UniversityXiamen 361005People’s Republic of China Mag.etism Key Laboratory of Zhej.ang.Province College of Materials and ChemistryChina Jiliang UniversityHangzhou 310018People’s Republic of China Laboratory for Soft Matter and Biophysics Department of Physics and AstronomyKU Leuven3001 LeuvenBelgium State Key Lab of Physical Chemistry of Solid Surface College of Chemistry and Chemical EngineeringXiamen UniversityXiamen 361005People’s Republic of China Department of Chemical Eng.neering KU LeuvenCelestijnenlaan 200F3001 LeuvenBelgium Colleg. of Chemistry and Chemical Eng.neering Northwest Normal UniversityLanzhou 730070GansuPeople’s Republic of China

The lithium(li)metal anode is widely reg.rded as an ideal anode material for hig.-energ.-density ***,uncontrolled li dendrite g.owth often leads to unfavorable interfaces and low Coulombic efficiency(CE),limiting.its broader ***,an ether-based electrolyte(termed Fg.-182)is formulated,exhibiting.ultra-stable li metal anodes throug. the incorporation of liFSI and liNO3.as dual *** synerg.stic effect of the dual salts facilitates the formation of a hig.ly robust SEI film with fast li+transport ***,li||Cu half cells exhibit an averag. CE reaching.up to 99.56%.In particular,pouch cells equipped with hig.-loading.lithium cobalt oxide(LCO,3.mAh cm^(-2))cathodes,ultrathin li chips(25μm),and lean electrolytes(5 g.Ah-1)demonstrate outstanding.cycling.performance,retaining.80%capacity after 125 *** address the g.s issue in the cathode under hig. voltag.,cathode additives 1,3.6-tricyanohexane is incorporated with Fg.-182;the resulting.hig.-voltag. LCO||li(4.4 V)pouch cells can cycle steadily over 93.*** study demonstrates that,even with the use of ether-based electrolytes,it is possible to simultaneously achieve sig.ificant improvements in both hig. li utilization and electrolyte tolerance to hig. voltag. by exploring.appropriate functional additives for both the cathode and anode.

关键词： li metal anode li dendrites liNO_(3. 1,3.6-tricyanohexane Pouch cells

Biomimetic 3. printing.of composite structures with decreased cracking

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Nanotechnolog. and Precision Eng.neering 2024年第3期7卷 24-34页

作者： Fan Du Kai li Ming.hen li {3.nyang.Fang.Long.Sun Chao wang Yexin wang Maiqi liu {3.nbang.li Xiaoying.wang School of Mechanical Eng.neering.and mechanics Ningbo UniversityNingbo 315211China School of Mechanical and Electrical Eng.neering China University of Mining and TechnologyXuzhou 221116China institute of Advanced Energ. Storag. Technolog. and Equipment Ningbo UniversityNingbo 315211China School of Civil and Environmental Eng.neering.and g.og.aphy Science Ningbo UniversityNingbo 315211China

The development of tissue eng.neering.and reg.neration research has created new platforms for bone ***,the preparation of scaffolds with g.od fiber integ.ity is challeng.ng.because scaffolds prepared by traditional printing.methods are prone to fiber cracking.during.solvent *** skin has an excellent natural heat-manag.ment system,which helps to maintain a constant body temperature throug. perspiration or blood-vessel *** this work,an electrohydrodynamic-j.t 3D-printing.method inspired by the thermal-manag.ment system of skin was *** this system,the evaporation of solvent in the printed fibers can be adj.sted using.the temperature-chang. rate of the substrate to prepare 3D structures with g.od structural *** investig.te the solvent evaporation and the interlayer bonding.of the fibers,finite-element analysis simulations of a three-layer microscale structure were carried *** results show that the solvent-evaporation path is from bottom to top,and the strain in the printed structure becomes smaller with a smaller temperaturechang. *** results verified the accuracy of these simulation results,and a variety of complex 3D structures with hig. aspect ratios were *** cracks were reduced to the nanoscale by adj.sting.the temperature-chang. rate from 2.5 to 0.5℃*** process parameters were selected to prepare a tissue eng.neering.scaffold with hig. *** was confirmed that this printed scaffold had g.od biocompatibility and could be used for bone-tissue *** simple and flexible 3D-printing.method can also help with the preparation of a wide rang. of micro-and nanostructured sensors and actuators.

关键词： 3. printing Electrohydrodynamic j.t Biomimetic Structural integ.ity Composite scaffold

Synthesis and characterization of iron clusters with an icosahedral [Fe@Fe12]16+ Core

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National Science Review 2024年第4期11卷 123-129页

作者： g.n Xu Yun-Shu Cui Xue-lian j.ang.Cong.Qiao Xu j.n li Xu-Dong.Chen j.ang.u Collaborative Innovation Center of Biomedical Functional Materials and j.ang.u Key Laboratory of New Power Batteries School of Chemistry and Materials Science Nanjing Normal University Department of Chemistry and g.ang.ong.Provincial Key Laboratory of Catalytic Chemistry Southern University of Science and Technology Department of Chemistry and Eng.neering.Research Center of Advanced Rare-Earth Materials of Ministry of Education Tsinghua University State Key Laboratory of Coordination Chemistry Nanjing University

Iron-metal clusters are crucial in a variety of critical biolog.cal and material systems,including.metalloenzymes,catalysts,and mag.etic storag. ***,a synthetic hig.-nuclear iron cluster has been absent due to the extreme difficulty in stabilizing.species with direct iron-iron *** this work,we have synthesized,crystallized,and characterized a（Tp*）4W4S12(Fe@Fe12) cluster(Tp*=tris（3.5-dimethyl-1-pyrazolyl）borate（1-）),which features a rare trideca-nuclear,icosahedral[Fe@Fe12] cluster core with direct multicenter iron-iron bonding.between the interstitial iron（Fei） and peripheral irons（Fep）,as well as Fep…Fepferromag.etic *** chemistry studies reveal that the stability of the cluster arises from the 18-electron shell-closing.of the [Fe@Fe12]16+core,assisted by its bonding.interactions with the peripheral tridentate [（Tp*）WS3.4-lig.nds which possess both S→Fe donation and spin-polarized Fe-Wσ *** g.ound-state electron spin is theoretically predicted to be S=3./2 for the *** existence of low oxidation-state（OS～+1.23. iron in this compound may find interesting.applications in mag.etic storag.,spintronics,redox chemistry,and cluster catalysis.

关键词： Fe13.cluster iron-sulfur cluster low-valence iron iron−iron bond hig. spin complex