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On Regularity of Incompressible Fluid with Shear Dependent Viscosity

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Chinese Annals of Mathematics,Series B 2012年第5期33卷 673-680页

作者： Hongjun YUAN qiu meng Institute of Mathematics Jilin UniversityChangchun 130012China

The authors consider a non-Newtonian fluid governed by equations with p-structure in a cubic domain.A fluid is said to be shear thinning(or pseudo-plastic) if 1 *** case p > 2 is considered in this *** improve the regularity results obtained by Crispo,it is shown that the secondorder derivatives of the velocity and the first-order derivative of the pressure belong to suitable spaces,by appealing to anisotropic Sobolev embeddings.

关键词： Non-Newtonian fluid Regularity Shear dependent viscosity

Seismicity changes and numerical simulation of coseismic deformation following the 2022 M_(s)6.8 Luding earthquake in Sichuan,China

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Science China Earth Sciences 2024年第8期67卷 2507-2521页

作者： qiu meng Zitao WANG Huai ZHANG Key Laboratory of Computational Geodynamics of Chinese Academy of Sciences College of Earth and Planetary SciencesUniversity of Chinese Academy of SciencesBeijing 100049China Institute of Earthquake Forecasting China Earthquake AdministrationBeijing 100036China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519080China Beijing Yanshan Earth Critical Zone National Research Station Beijing 101408China

The Xianshuihe fault is a major tectonic boundary between the Sichuan-Yunnan rhombic and Bayanhar blocks in Southwest *** an average left-lateral strike-slip movement of 10–15 mm/yr,it is a fast-moving strike-slip continental *** September 5,2022,the Ms6.8 Luding earthquake occurred along the Moxi segment of the Xianshuihe fault,reaching a maximum intensity of IX and resulting in a significant number of casualties and severe property *** earthquake broke the long-standing seismic quiescence of the Xianshuihe fault,which lasted for more than 40 years,and was followed by a significant number of *** outstanding question is how the behavior of the Xianshuihe fault and major earthquakes changed following this *** this study,we examined the changes in regional seismicity following the Luding earthquake and identified the potential for future strong earthquakes along the Xianshuihe *** used a finite element numerical method to simulate the environment of the seismogenic fault and its adjacent *** addition,we used the coseismic slip model of the Luding earthquake with the split-node method to calculate how the stress and strain fields in the surrounding area were affected by the2022 *** stress changes were resolved in the main faults,and the seismicity of adjacent faults was analyzed in conjunction with the observed seismic *** results indicate that regional tectonic movement primarily occurred to the southeast along the Moxi *** stress field is approximately north-south in tension and east-west in *** in the stress field in the epicentral region of the Luding earthquake exceeded 1 *** maximum displacement of the coseismic deformation field was concentrated between Moxi town and Tuanjie village,and the Coulomb stress of the fault zone in this region experienced the largest ***,the b-value of the Gutenberg-Richter magnitude-frequency relationship at the epicenter a

关键词： Luding earthquake Seismicity Coulomb failure stress change Finite element numerical simulation

p-Laplacian Equations on Locally Finite Graphs

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Acta Mathematica Sinica,English Series 2021年第11期37卷 1645-1678页

作者： Xiao Li HAN meng qiu SHAO Department of Mathematical Sciences Tsinghua UniversityBeijing 100084P.R.China

This paper is mainly concerned with the following nonlinear p-Laplacian equation-△pu(x)+(λa(x)+1)|u|^(p-2)(x)u(x)=f(x,u(x)),in V on a locally finite graph G=(V,E)with more general nonlinear term,whereΔp is the discrete pLaplacian on graphs,p≥*** some suitable conditions on f and a(x),we can prove that the equation admits a positive solution by the Mountain Pass theorem and a ground state solution uλvia the method of Nehari manifold,for anyλ>*** addition,asλ→+∞,we prove that the solution uλconverge to a solution of the following Dirichlet problem{-△pu(x)+|u|^(p-2)(x)u(x)=f(x,u(x)),inΩ,u(x)=0,onδΩwhereΩ={x∈V:a(x)=0}is the potential well and δΩ denotes the the boundary ofΩ.

关键词： p-Laplacian equation locally finite graph ground state solution

Finite element simulation of deformation and stress changes of Kalpin-Kemin fault system in the Southwest Tianshan Orogenic Belt

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Science China Earth Sciences 2022年第5期65卷 863-873页

作者： Zitao WANG Huai ZHANG qiu meng Yaolin SHI Key Laboratory of Computational Geodynamics University of Chinese Academy of SciencesBeijing 100049China

Under the shadow of the far-field effect of the India-Eurasia collision,the Tianshan orogenic belt underwent tectonic re-activation in the Cenozoic,accompanied by strong tectonic deformation and frequent large *** by two rigid cratonic blocks located in its north and south,a series of marginal foreland fold-and-thrust belts are developed within the Tianshan orogenic belt and continue to develop to the bilateral pull-apart ***,the faults in the orogenic belt are *** deformation caused by thrust-related structure accounts for larger than 50%of the total convergence of the Tianshan Mountains,which results in the most active structure with large earthquakes in the Tianshan ***,it is of great significance to study the dynamic process of the newly generated and reactivated thrust-nappe structures in Tianshan orogen via numerical *** paper selects a classical cross-section profile in the western segment of the Southwest Tianshan Mountains,which contains the Kalpin-Maidan-Nalati-Kemin fault system from the south to the *** attempt to establish a two-dimensional plane strain,viscoelastic finite element model,by treating the regional faults as a whole fault system and considering the topography,fault geometry,and GPS *** displacement and stress fields of the model are retrieved,the short-term cumulative deformation field of the overall fault system is analyzed,and the rate of Coulomb failure stress change of each fault is also *** results show that the deformation is concentrated in the middle and southern parts of the Southwest Tianshan *** contrast,the deformation of the Kemin fault in the north is relatively *** to the Coulomb failure stress changes of these four faults and the historical earthquake catalog,the potential seismicity of each fault is qualitatively *** preliminary results suggest that the possibility of large earthquake occurrence is higher in the

关键词： Tianshan orogenic belt Viscoelastic finite element Coulomb failure stress change Seismicity

A policy-based billing management architecture for the next generation IP-based network

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High Technology Letters 2006年第3期12卷 300-303页

作者：成璐 qiu Xuesong meng Luoming State Key Laboratory of Networking and Switching Technology Beijing Ulliversitv of Posts and Telecommunieations Beijing 100876 P.R. China

IP billing is not only a basic functionality to operate IP sen＇ices, but also it is fundamental to offer customers with a stable and QoS-enabled network environment. As IP-based network has been widely agreed to be the core network of NGN, and existing IP billing system is too simple to fulfill the emerging requirements, the next generation IP billing has become an interesting topic in recent years. Policy-based management brings flexibility and scalability to systems by describing management logic and functions through policies, and thus reduces the complexity of the management of large-scale systems. Working on existing efforts, this paper proposed an improved IETF policy framework based upon which a policy-based billing management architecture for the next generation IP-based network was presented. Then a prototype with some basic functionalities was developed. The results of the experiment validated the expected improvements specified in this paper.

关键词： Policy-based Architecture IP billing Operation system

Modulated thermal transport for flexural and in-plane phonons in double-stub graphene nanoribbons

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Chinese Physics B 2018年第8期27卷 566-571页

作者： Chang-Ning Pan meng-qiu Long JuJa He Hunan Key Laboratory of Super Micro-structure and Ultrafast Process School of Physics and Electronics Central South UniversityChangsha 410083China School of Science Hunan University of TechnologyZhuzhou 412008China

Thermal transport properties are investigated for out-of-plane phonon modes （FPMs） and it-plane phonon modes （IPMs） in double-stub graphene nanoribbons （GNRs）. The results show that the quantized thermal conductance plateau of FPMs is narrower and more easily broken by the double-stub structure. In the straight GNRs, the thermal conductance of FPMs is higher in the low temperature region due to there being less cut-off frequency and more low-frequency excited modes. In contrast, the thermal conductance of IPMs is higher in the high temperature region becau~,＇.e of the wider phonon energy spectrum. Furthermore, the thermal transport of two types of phonon modes can be modulated by the double-stub GNRs, the thermal conductance of FPMs is less than that of IPMs in the low temperatures, but it dominates the contribution to the total thermal conductance in the high temperatures. The modulated thermal conclu~＇tanc：e can provide a guideline for designing high-performance thermal or thermoelectric nanodevices based on graphene.

关键词： graphene nanoribbon flexural phonons in-plane phonons thermoelectric properties

Introduction to the Special Issue on Two-Dimensional Materials and Their Biophotonic Applications

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Journal of Innovative Optical Health Sciences 2020年第5期3卷 1-2页

作者： Han Zhang meng qiu Wei Tao Key Laboratory of Optoelectronic Devices and Systems of Guangdong Province College of Optoelectronic Engineering Shenzhen University ShenzhenGuangdong 518060P.R.China Key Laboratory of Marine Chemistry Theory and Technology Ocean University of China QingdaoShandong 266100P.R.China Center for Nanomedicine Brigham and Women's Hospital Harvard Medical SchoolBostonMA 02115USA

Emerging two-dimensional(2D)materials have attracted considerable attention on applications in electronics,optoelectronics,batteries as well as biomedicine in recent years,due to their unique physicochemical *** the intrinsic fluorescence and photoacoustic properties,2D materials have been used as biological imaging agents for cancer *** to the near-infrared(NIR)optical absorbance,large extinction coeffi-cient as well as high catalytic efficacy,2D materi-als-based photothermal and photodynamic therapies have achieved excellent anti-tumor ther-apeutic efficacy.

关键词： properties. efficacy. extinction

FINITE ELEMENT ANALYSIS OF CARDIAC MYOCYTE DEBONDING AND REORIENTATION DURING CYCLIC SUBSTRATE STRETCH EXPERIMENTS

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Acta Mechanica Solida Sinica 2009年第4期22卷 307-319页

作者： Tao Tang Jun qiu meng Zhang Zhuo Zhuang School of Aerospace Tsinghua University Beijing 10084 China

The substrate stretch experiment, which is carried out on several kinds of adherent cells, is usually used to catch the physiological variation and morphological response to cyclic substrate deformation. In this paper, stretch loading was exerted on cardiac myocytes cultured on silica substrates using a custom-made substrate stretch device. The effect of stretch on the alignment orientation of cardiac myocytes was studied through morphocytological statistics. Under cyclic stretch stimulus, the long axes of cardiac myocytes oriented perpendicularly to the stretch direction for continuous stretch acting. However, the mechanism underlying these behaviors is not well understood from such in vitro tests. Finite element （FE） model was developed in the analysis to investigate these behaviors. Xu-Needleman formulation was used to define the interaction behavior for contact surfaces between cell and substrate. The role of cell viscoelasticity nature is studied in adherent cell debonding with the substrate and aligning perpendicular to the stretch direction during long time cyclic stretch stimulation. There were four different strain magnitudes considered in the simulation to find out the cell debonding affected by the cyclic strains. The potential role of cyclic strain frequency in regulating cell debonding and alignment was also studied using FE analysis.

关键词： cardiac myocyte cyclic substrate stretch cell adhesion finite element

Black phosphorus:A novel nanoplatform with potential in the¯eld of bio-photonic nanomedicine

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Journal of Innovative Optical Health Sciences 2018年第6期11卷 1-20页

作者： Taojian Fan Yansheng Zhou meng qiu Han Zhang Shenzhen Engineering Laboratory of Phosphorene and Optoelectronics Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Optoelectronic Engineering Shenzhen University Shenzhen 518060 P.R.China

Single-or few-layer black phosphorus(FLBP)has attracted great attentions in scientic community with its excellent properties,including biodegradability,unique puckered lattice conguration,attractive electrical properties and direct and tunable band *** recent years,FLBP has been widely studied in bio-photonicelds such as photothermal and photodynamic therapy,drug delivery,bioimaging and biosensor,showing attractive clinical *** of the marked advantages of FLBP nanomaterials in bio-photonicelds,this review article reviews the latest advances of biomaterials based on FLBP in biomedical applications,ranging from biocompatibility,medical diagnosis to treatment.

关键词： Black phosphorus biosensing drug delivery biocompatibility photothermal and photodynamic therapies