检索结果-南通市图书馆

Square-mean Almost Periodic Solutions to Some Stochastic Evolution Equations

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Sinica,English Series 2014年第5期30卷 881-898页

作者： xi liang li School of Mathematics and Information Sciences Shandong Institute of Business and Technology

This paper concerns the square-mean almost periodic mild solutions to a class of abstract nonautonomous functional integro-differential stochastic evolution equations in a real separable Hilbert space. By using the so-called ＂Acquistapace–Terreni＂ conditions and the Banach fixed point theorem, we establish the existence, uniqueness and the asymptotical stability of square-mean almost periodic solutions to such nonautonomous stochastic differential equations. As an application, almost periodic solution to a concrete nonautonomous stochastic integro-differential equation is considered to illustrate the applicability of our abstract results.

关键词： Square-mean almost periodicity,functional integro-differential equations,＂AcquistapaceTerreni＂ conditions,evolution family

A Novel Analysis Approach of Uniform Persistence for an Epidemic Model with Quarantine and Standard Incidence Rate

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2023年

作者： Song-bai GUO Yu-ling XUE xi-liang li Zuo-huan ZHENG Academy of Mathematics and Systems Science Chinese Academy of Sciences School of Mathematical Sciences University of Chinese Academy of Sciences School of Science Beijing University of Civil Engineering and Architecture School of Mathematics and Information Science Shandong Technology and Business University School of Mathematics and Statistics Hainan Normal University

Inspired by the transmission characteristics of the coronavirus disease 2019(COVID-19), an epidemic model with quarantine and standard incidence rate is first developed, then a novel analysis approach is proposed for finding the ultimate lower bound of the number of infected individuals, which means that the epidemic is uniformly persistent if the control reproduction number Rc> 1. This approach can be applied to the related biomathematical models, and some existing works can be improved by using that. In addition, the infection-free equilibrium V0of the model is locally asymptotically stable(LAS) if Rclinearly stable if Rc= 1; while V0is unstable if Rc> 1.

关键词：

Square-mean Almost Automorphic Solutions to Some Stochastic Evolution Equations I: Autonomous Case

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2015年第3期31卷 577-590页

作者： xi-liang li Yu-liang HAN Bai-feng liU School of Mathematics and Information Science Shandong Institute of Business and Technology

This paper concerns the square-mean almost automorphic solutions to a class of abstract semilinear functional integro-differential stochastic evolution equations in real separable Hilbert spaces. Under some suitable assumptions, the existence, uniqueness and asymptotic stability of the square-mean almost automorphic mild solution to some stochastic differential equations are established. As an application, we analyze the almost automorphic mild solution to some stochastic partial functional differential equation which turns out to be in good agreement with our abstract results.

关键词： square-mean almost automorphy integro-differential equations stochastic evolution equations.

A Note on Equilibrium of Eventually Strongly Monotone Skew-product Semiflows

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2010年第2期26卷 307-310页

作者： xi-liang li Zuo-huan Zheng Shandong Institute of Business and Technology Yantai 264005 China Institute of Applied Mathematics Academy of Mathematics and Systems Science Chinese Academy of SciencesBeijing 100190 China

In this paper, we show that for an eventually strongly monotone skew-product semiflow τ, the strict ordering on Ec （the set consisting of continuous equilibria of τ） implies the strong one.

关键词： continuous equilibrium eventually strongly monotone skew-product semiflow

放牧诱导的植物遗留效应可以通过较大的根系分配可塑性增强其干旱适应性

在线全文

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2021年第6期14卷 1024-1029页

作者： Feng-Hui Guo xi-liang li Jing-Jing Yin Saheed Olaide Jimoh xiang-Yang Hou College of Grassland Science Shanxi Agricultural UniversityTaigu 030801ShanxiChina Institute of Grassland Research Chinese Academy of Agricultural SciencesHohhot 010010Inner MongoliaChina School of Ecology and Environment Inner Mongolia UniversityHohhot 010010Inner MongoliaChina

为探索植物的放牧遗留效应是否有利于天然草原生态系统应对干旱环境,我们采集了内蒙古典型草原自由放牧和多年围封样地内的冰草(Agropyron cristatum)和黄囊苔草(Carex korshinskyi)幼苗进行了温室控水试验。研究结果表明,干旱处理对自... 详细信息

为探索植物的放牧遗留效应是否有利于天然草原生态系统应对干旱环境,我们采集了内蒙古典型草原自由放牧和多年围封样地内的冰草(Agropyron cristatum)和黄囊苔草(Carex korshinskyi)幼苗进行了温室控水试验。研究结果表明,干旱处理对自由放牧样地采集的冰草和黄囊苔草子株生物量、子株数量和总生物量的影响较小;自由放牧区的冰草与黄囊苔草较强的干旱适应性可部分由干旱处理下较大的根系分配可塑性来解释。本研究结果表明合理放牧是天然草原适应气候变化的潜在管理办法之一。

关键词：气候变化放牧遗留效应干旱根系生物量分配

Long noncoding RNAs HAND2-AS1 ultrasound microbubbles suppress hepatocellular carcinoma progression by regulating the miR-873-5p/tissue inhibitor of matrix metalloproteinase-2 axis

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastrointestinal Oncology 2024年第4期16卷 1547-1563页

作者： Qiang Zou Hao-Wen Wang xi-liang Di Yuan li Hui Gao Department of Interventional Therapy Tianjin Medical University Cancer Institute and HospitalTianjin 300060China National Clinical Research Center for Cancer Key Laboratory of Cancer Prevention and TherapyTianjin’s Clinical Research Center for CancerTianjin 300060China College of Animal Science and Technology Northeast Agricultural UniversityHarbin 150030Heilongjiang ProvinceChina Department of Hematology and Oncology Linyi People’s HospitalLinyi 251500Shandong ProvinceChina Department of Comprehensive Oncology Baotou Cancer HospitalBaotou 014030Inner Mongolia Autonomous RegionChina

BACKGROUND Increasing data indicated that long noncoding RNAs(lncRNAs)were directly or indirectly involved in the occurrence and development of tumors,including hepatocellular carcinoma(HCC).Recent studies had found that the expression of lncRNA HAND2-AS1 was downregulated in HCC tissues,but its role in HCC progression is unclear.Ultrasound targeted microbubble destruction mediated gene transfection is a new method to overexpress genes.AIM To study the role of ultrasound microbubbles(UTMBs)mediated HAND2-AS1 in the progression of HCC,in order to provide a new reference for the treatment of HCC.METHODS In vitro,we transfected HAND2-AS1 siRNA into HepG2 cells by UTMBs,and detected cell proliferation,apoptosis,invasion and epithelial-mesenchymal transition(EMT)by cell counting kit-8 assay,flow cytometry,Transwell invasion assay and Western blotting,respectively.In addition,we transfected miR-837-5p mimic into UTMBs treated cells and observed the changes of cell behavior.Next,the UTMBs treated HepG2 cells were transfected together with miR-837-5p mimic and tissue inhibitor of matrix metalloproteinase-2(TIMP2)overexpression vector,and we detected cell proliferation,apoptosis,invasion and EMT.In vivo,we established a mouse model of subcutaneous transplantation of HepG2 cells and observed the effect of HAND2-AS1 silencing on tumor formation ability.RESULTS We found that UTMBs carrying HAND2-AS1 restricted cell proliferation,invasion,and EMT,encouraged apoptosis,and HAND2-AS1 silencing eliminated the effect of UTMBs.Additionally,miR-873-5p targets the gene HAND2-AS1,which also targets the 3’UTR of TIMP2.And miR-873-5p mimic counteracted the impact of HAND2-AS1.Further,miR-873-5p mimic solely or in combination with pcDNA-TIMP2 had been transformed into HepG2 cells exposed to UTMBs.We discovered that TIMP2 reversed the effect of miR-873-5p mimic caused by the blocked signalling cascade for matrix metalloproteinase(MMP)2/MMP9.In vivo results showed that HAND2-AS1 silencing significantly inhibited tumor formation in mice.CON

关键词： Hepatocellular carcinoma Ultrasound microbubbles Long noncoding RNA HAND2-AS1 miR-873-5p Tissue inhibitor of matrix metalloproteinase-2

New phenylbutenoids and terpene glycosides from Ginkgo biloba leaves

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Natural Medicines 2024年第2期22卷 161-170页

作者： SUN Zeshi liN Shan WU Zhi-li DONG Hong-Yuan XU xi-Ke li Hui-liang WANG Jinxin School of Pharmacy Second Military Medical UniversityShanghai 200433China State Key Laboratory of New Drug and Pharmaceutical Process Shanghai Institute of Pharmaceutical IndustryChina State Institute of Pharmaceutical IndustryShanghai 201203China

Our continued works on the chemical constituents of Ginkgo biloba(G.biloba)leaves has led to the isolation of two novel phenylbutenoids(1,2),along with five previously unidentified terpene glycosides(3−7).Among them,compounds 1 and 2 represent unique(Z)-phenylbutenoids,3−6 are megastigmane glycosides,and 7 is identified as a rare bilobanone glycoside(Fig.1).This study marks the first reported isolation of phenylbutenoid and bilobanone glycoside from G.biloba.The chemical structures of these compounds were elucidated through extensive spectroscopic analysis,including HR-ESI-MS and various 1D and 2D NMR experiments.Furthermore,the absolute configurations of these molecules were determined using Mosher’s method,ECD experiments,and Cu-KαX-ray crystallographic analyses.

关键词： Ginkgo biloba Phenylbutenoid Megastigmane glycoside Bilobanone glycoside

Engineering Fe OOH/Ni（OH）2 heterostructures on Ni3S2 surface to enhance seawater splitting

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Rare Metals 2024年第5期43卷 1989-1998页

作者： Chen Yang Ya-Dong li li-Juan Cao xi-Long Wang Han-Pu liang Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences Sino-Danish College University of Chinese Academy of Sciences

The construction of highly stable and efficient electrocatalysts is desirable for seawater splitting but remains challenging due to the high concentration of Cl-in seawater.Herein,Fe OOH/Ni（OH）2heterostructure supported on Ni3S2-covered nickel foam （Fe–Ni/Ni3S2/NF）was fabricated by hydrothermal and etching methods,as well as anodic oxidation process.The electronic structure of Fe OOH and Ni（OH）2could be modulated after depositing Fe OOH nanoparticles on Ni（OH）2nanosheet,which greatly boosted the catalytic activity.When the catalyst used as an electrode for oxygen evolution reaction（OER）,it needed low overpotentials of 266 and 368 m V to achieve current densities of 100 and 800 m A·cm-2,respectively,in 1 mol·L-1KOH+seawater electrolyte.It can operate continuously at 100 m A·cm-2for 400 h without obvious decay.Particularly,in situ generated SO42-from inner Ni3S2during electrolysis process would accumulate on the surface of active sites to form passivation layers to repel Cl-,which seemed to be responsible for superior stability.The study not only synthesizes an OER catalyst for highly selective and stable seawater splitting,but also gives a novel approach for industrial hydrogen production.

关键词： Anodic oxidation Heterostructure Oxygen evolution reaction Seawater splitting

Congener-derived template to construct lithiophilic organic-inorganic layer/interphase for high volumetric capacity dendrite-free li metal batteries

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第3期35卷 453-460页

作者： Kang Yang Long li Yuanbin xiao Qiaoli Zhang Chenpeng xi Borong li Yan Yu Chengkai Yang Key Laboratory of Advanced Materials Technologies International(HongKong Macao and Taiwan)Joint Laboratory on Advanced Materials TechnologiesCollege of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China

The development of lithium-metal batteries(LMBs)is seriously restricted by the out-of-control dendrites growth and infinite volume expansion.Herein,a pervasive organic-inorganic layer construction strategy is reported for the composite lithium metal anode with congener-derived organic-inorganic solid electrolyte interphase(SEI).In this strategy,the organic-inorganic Ag@polydopamine(Ag@PDA)layer is coated on the arbitrary substrates by a simple two-step method.The thin and stable congener-derived SEI is insitu formed with fewer inorganic components and more organic components during charging/discharging.The polydopamine with sufficient adhesion groups and lithiophilic Ag layer realize near-zero nucleation overpotential during lithium deposition.The low interface resistance and stable lithium deposition are achieved.Moreover,the practical areal and volumetric capacities of the composite anode with three-dimensional copper(3DCu)as the substrate are 10 mAh/cm^(2)and 1538 mAh/cm^3(vs.the mass of anode).The symmetrical cell shows very low polarization voltage(10 mV)and more than 2500 h cycles life at 1 mA/cm^(2)(1 mAh/cm^(2)).The liNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM811)-based full cells show improved capacity retention(82%)after 100 cycles at 0.5 C.The modified lithiophilic anode with congener-derived interphase provides a promising strategy to realize the next-generation dendrite-free LMBs.

关键词： lithium metal anode Congener-derived lithiophilicity Volumetric capacity Organic-inorganic interphase