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L^(p)-solutions of Multi-dimensional Oblique Reflected BSDEs and Optimal Switching Problem on Finite or Infinite Time Horizon

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Acta Mathematicae Applicatae Sinica 2024年第4期40卷 1127-1146页

作者： Xue-jun shi qun FENG Long JIANG School of Mathematics and Statistics Shandong Normal UniversityJinan 250358China School of Management Science and Engineering University of JinanJinan 250002China School of Mathematics China University of Mining and TechnologyXuzhou 221116China

In this paper,we study mulit-dimensional oblique reflected backward stochastic differential equations(RBSDEs)in a more general framework over finite or infinite time horizon,corresponding to the pricing problem for a ... 详细信息

关键词： multi-dimensional oblique reflected BSDE optimal switching and stopping problem finite or infinite time horizon uniformly continuous generators

Recognition of trench basins in collisional orogens:Insights from the Yarlung Zangbo suture zone in southern Tibet

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Science China Earth Sciences 2020年第12期63卷 2017-2028页

作者： Xiumian Hu wei An Eduardo Garzanti qun Liu Institute of Continental Geodynamics State Key Laboratory for Mineral Deposits ResearchSchool of Earth Sciences and EngineeringNanjing UniversityNanjing210023China School of Resources and Environmental Engineering Hefei University of TechnologyHefei230009China Department of Earth and Environmental Sciences Universitàdi Milano-BicoccaMilano20126Italy

Trench basin,as an important sedimentary repository in oceanic subduction zones,documents faithfully the evolution of paleodrainage and paleogeographic *** of the frequent intense deformation during and after deposition,the recognition of trench-basin strata in orogenic belts is quite *** trench-fill deposits have been identified from the Yarlung Zangbo suture in southern Tibet,which can be classified into two types based on major differences in formation timing and tectonic *** first type developed during subduction of the Neotethyan oceanic slab in the Cretaceous(e.g.,the Jiachala,Rongmawa,and Luogangcuo formations),and the second type developed during the initial stage of the India-Asia collision in the Palaeogene(e.g.,the Sangdanlin-Zheya formations).The former was originally deposited on the subducting oceanic crust and then accreted as tectonic slices into the subduction complex;the latter was deposited unconformably on the continental margin of the subducting Indian plate and then involved in the subduction complex during the continental *** lithologies of trench-basin fills include abyssal chert,siliceous shale,silty to sandy turbidites,debris flows deposits,and slump deposits without *** feeding these basins were chiefly from the uplifted terrane in the upper *** paper summarizes the geological features of trench basins developed in southern Tibet and proposes criteria for recognizing trench-basins in collisional orogens.

关键词： Trench basin.Provenance analysis Yarlung Zangbo suture zone Southern Tibet Cretaceous-Paleocene Himalayan orogen

SYNTHESIS OF CROSS-CONJUGATED(p-PHENYLENE)S-POLY(p-PHENYLENEVINYLENE)S HYBRIDS WITH LOW CONTENT OF STRUCTURAL DEFECTS

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Chinese Journal of Polymer Science 2007年第2期25卷 171-179页

作者： shi-jun Zheng qun Xu Shao-kui Cao College of the Material Science and Engineertng Zhengzhou University Zhengzhou 450052 China

The novel shish-kebab-type liquid crystalline cross-conjugated （p-phenylene）s-poly（p-phenylenevinylene）s hybrid was synthesized through Gilch polymerization. Their structures and properties were characterized by NMR, GPC, DSC, X-ray diffraction and polarizing optical microscope （POM）. ^1H-NMR investigation of the polymers indicates that the shish-kebab-structure has a strong ability to suppress the structural defects in the polymers. The polymers are enantiotropic liquid crystals. The melting point （Tm） of the polymers decreases when the length of the alkoxy tails of the mesogenic units increases. The mesophase was identified by X-ray diffraction method. They showed not only a smectic LC phase, but also a strong green fluorescence in chloroform. The maximum absorption band of the ＂kebabs＂ of the two, 5-bis（4＇- alkoxyphenyl）benzene at 280 nm did not appear in absorption spectra of the polymers. The same phenomena were also observed in the fluorescence spectra. These results imply that the polymers have formed a cross-conjugated uniform structure and achieved an extended n-conjugation polymer.

关键词： Gilch polymerization Conjugated polymer Liquid crystal shish-kebab Fluorescence.

An Impulsive Heating Model for the Evolution of Coronal Loops

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Chinese Journal of Astronomy and Astrophysics 2006年第5期6卷 608-616页

作者： Li Feng wei-qun Gan Purple Mountain Observatory Chinese Academy of Sciences Nanjing 210008 Max Planck Institute for Solar System Research Max-Planck-Str. 2 37191 Katlenburg-LindauGermany

It was suggested by Parker that the solar corona is heated by many small energy release events generally called microflares or nanoflares. More and more observations showed flows and intensity variations in nonflaring loops. Both theories and observations have indicated that the heating of coronal loops should actually be unsteady. Using SOLFTM （Solar Flux Tube Model）, we investigate the hydrodynamics of coronal loops undergoing different manners of impulsive heating with the same total energy deposition. The half length of the loops is 110 Mm, a typical length of active region loops. We divide the loops into two categories： loops that experience catastrophic cooling and loops that do not. It is found that when the nanoflare heating sources are in the coronal part, the loops are in non-catastrophic-cooling state and their evolutions are similar. When the heating is localized below the transition region, the loops evolve in quite different ways. It is shown that with increasing number of heating pulses and inter-pulse time, the catastrophic cooling is weakened, delayed, or even disappears altogether.

关键词： hydrodynamics -- Sun corona -- Sun transition region

Ir(Ⅲ)-based Ratiometric Hypoxic Probe for Cell Imaging

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Chinese Journal of Polymer Science 2023年第5期41卷 794-801,I0011页

作者： shi-Lu Ji Hua-Min Lan Sen-Sen Zhou Xiao-Ke Zhang wei-Zhi Chen Xi-qun Jiang Department of Polymer Science&Engineering College of Chemistry&Chemical EngineeringNanjing UniversityNanjing 210093China College of Science Nanjing Forestry UniversityNanjing 210037China

Two new ratiometric hypoxia probes(Ir-C343 and Ir-GFP)are synthesized by covalently incorporating florescent internal standard molecules coumarin 343(C343)and green fluorescent protein(GFP)into bis[1-(9,9-dimethyl-9H-fluoren-2-yl)-isoquinoline](succinylacetone)Ir(Ⅲ)(Ir-fliq),*** connecting with internal standard molecules,the Ir-fliq moiety still exhibits high sensitivity to oxygen concentration,while the fluorescence intensity of the internal standard remains relatively constant under different oxygen *** a result,a ratiometric response is realized that is only related to oxygen *** addition,Ir-GFP shows more promising applications in the ratiometric hypoxia imaging of cells due to its long excitation wavelength,good water solubility,high biocompatibility,and low relative fluorescence intensity compared with the phosphorescent emitter Ir-fliq.

关键词： Hypoxia probe Ratiometric probe Hypoxic response Cell imaging

First-Principles Study of Hydrogen Impact on the Formation and Migration of Helium Interstitial Defects in hcp Titanium

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Chinese Physics Letters 2012年第1期29卷 82-85页

作者： LU Yong-Fang shi Li-qun DING wei LONG Xing-Gui Institute of Modern Physics Fudan UniversityShanghai 200433 Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900

We present a first-principles study of the effects of hydrogen on helium behavior in hcp *** calculation indicates that the dissolved H atoms in hcp Ti change the formation energy of the interstitial He atom,but they do not change the energetically favorable occupying site of the He atom,i.e.,the tetrahedral site is more favorable than the octahedral *** impacts of H on the formation of interstitial He defects are directly related to the atomic environment around H atoms and their positions relative to interstitial He atoms as *** He diffusion,a tetrahedral interstitial He atom can more easily migrate along the indirect tetrahedron-octahedron-tetrahedron path than the direct path of *** a H atom exists in the first neighbor octahedral site from the He,the activation energy for He atom diffusion is 0.46eV,which is higher than that of the He atom diffusion in perfect crystal,0.41 *** the number of H atoms to two,He diffusion needs much higher activation *** suggests that the H atoms around interstitial He may impede the migration of interstitial He atom in hcp Ti.

关键词： diffusion activation Titanium

Factorizability of the Two-Component Bose-Einstein Condensate Ground State

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Chinese Physics Letters 1999年第1期16卷 9-11页

作者： HUANG Hu LI shi-qun Department of Modern Applied Physics Tsinghua UniversityBeijing 100084 Rochester Theory Center for Optical Science and Engineering University of RochesterRochesterNY 14627USA

In this report the two-component Bose-Einstein condensate ground state is shown to be in factorized form following energy minimization *** argument can also be applied to excited *** implies that for stationary states... 详细信息

关键词： states. argument Einstein

Bus passengers’anger scale and expression in anger-provoking situations

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Transportation Safety and Environment 2023年第1期5卷 18-30页

作者： Zhili Yuan qun Chen shi Ye School of Traffic and Transportation Engineering Central South UniversityChangsha 410075HunanChina.

This paper investigates the scale and expression of passengers’anger arising from disputes between drivers and passengers,and between passengers,by surveying a sample of 757 undergraduate *** bus passengers’anger scale and expression inventory(BPASX),a newly-designed questionnaire battery,is used to analyse the anger levels and resulting behaviour expression of passengers in 6-item anger-provoking *** analysis shows that a positive correlation exists between the frequency or duration of bus rides and anger levels/external anger expression,while self-adaptive expression is only correlated with *** differs only in the violent external expression,where males display a greater ***,the correlations of anger levels between anger-provoking situations are significantly ***,anger expression patterns gradually shift from self-adaptation to external expression as anger levels grow in general,but the variation rules of expression frequency are ***,this study provides a newly effective tool to explore characteristics of the anger expression of bus passengers in different anger-provoking scenarios and demonstrates its variation features when anger levels change.

关键词： anger bus passengers expression bus passengers’anger and expression inventory(BPASX)

Multipartite Entanglement of a Tetrahedron Lattice

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Communications in Theoretical Physics 2006年第5X期46卷 863-872页

作者： ZHANG Rong ZHU shi-qun HAO Xiang School of Physical Science and Technology Suzhou University Suzhou 215006 China

Three-dimensional Heisenberg model in the form of a tetrahedron lattice is investigated. The concurrence and multipartite entanglement are calculated through 2-concurrence C and 4-concurrence C4. The concurrence C and multipartite entanglement G4 depend on different coupling strengths Ji and are decreased when the temperature T is increased. For a symmetric tetrahedron lattice, the concurrence C is symmetric about J1 when J~ is negative while the multipartite entanglement G4 is symmetric about J1 when J2 〈 2. For a regular tetrahedron lattice, the concurrence G of ground state is 1/3 for ferromagnetic case while G = 0 for antiferromagnetic ***. However, there is no multipartitc entanglement since C4=0 in a regular tetrahedron lattice. The external magnetic field 13 can increase the maximum value of the concurrence GB and induce two or three peaks in Cn. There is a peak in the multipartite entanglement G4 B when G4B is varied as a function of the temperature T. This peak is mainly induced by the magnetic field B.

关键词： multipartite entanglement concurrence three dimensions tetrahedron lattice