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Stationary distribution and extinction for a stochastic two-compartment model of B-cell chronic lymphocytic leukemia

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International Journal of Biomathematics 2021年第8期14卷 141-156页

作者： miaomiao gao Daqing Jiang Xiangdan Wen College of Science China University of Petroleum(East China)Qingdao 266580P.R.China Key Laboratory of Unconventional Oil and Gas Development China University of Petroleum(East China)Ministry of EducationQingdao 266580P.R.China Nonlinear Analysis and Applied Mathematics(NAAM)-Research Group Department of MathematicsKing Abdulaziz UniversityJeddah 21589Saudi Arabia Department of Mathematics Yanbian UniversityYanji 133002Jilin ProvinceP.R.China

In this paper,we study the dynamical behavior of a stochastic two-compartment model of B-cell chronic lymphocytic leukemia,which is perturbed by white ***,by constructing suitable Lyapunov functions,we establish sufficient conditions for the existence of a unique ergodic stationary ***,conditions for extinction of the disease are ***,numerical simulations are presented for supporting the theoretical *** results show that large noise intensity may contribute to extinction of the disease.

关键词： Stochastic two-compartment model B-cell chronic lymphocytic leukemia stationary distribution extinction

Stationary distribution and periodic solution of stochastic chemostat models with single-species growth on two nutrients

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International Journal of Biomathematics 2019年第6期12卷 23-41页

作者： miaomiao gao Daqing Jiang Taxawar Haya College of Science China University o/Petroleum(Haul China)Qingdao 266580P.R.China Keg laboratory of Unconventional Oil and Cos Development China University of Petroleum(East China)Ministry of Education.Qingdao 260580.P.It.China Nonlinear Analysis and Applied Mathematics(NAAM)-Research Group Department of Mathematics.King Abdulaziz University Jeddah 21589 Saudi Arabia Department of Mathematics Quaid-I-Azam University 45320 Islamabad 44000.Pakistan

In this paper,we consider two chemostat models w th random perturbation,in which single species depends on two perfectly substitutable resources for *** the autonomous system,we first prove that the solution of the system is positive and *** we establish sufficient conditions for the existence of an ergodic stationary distribu tion by constructing appropriate Lyapunov functions-For the non-autonomous system,by using Mas'minskii theory on periodic Markov processes,we derive it admits a nontriv ial positive periodic ***,numerical simulations are carried out to illustrate our main results.

关键词： Chemostat model Lyapunov function stationary distribution Markov pro cess periodic solution.

Solid-state template-free fabrication of uniform Mo2C microflowers with lithium storage towards Li-ion batteries

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Chinese Chemical Letters 2020年第6期31卷 1670-1673页

作者： Jinfeng Sun Lingzhi Guo miaomiao gao Xuan Sun Jinyang Zhang Longwei Liang Yang Liu Linrui Hou Changzhou Yuan School of Material Science&Engineering University of JinanJi'nan 250022China

Herein,we first report one-step synthesis of uniform Mo2 C microflowers(MCMFs)from low-cost precursors via industrialized solid-state *** fine optimization in precursor ratio and pyrolysis temperatures,the as-fabricated MCMFs are assembled well with interconnected single-crystalline nanosheet *** encouragingly,the resultant MCMFs are further highlighted as a competitive anode with robust and long-duration lithium-storage behaviors towards high-performance Li-ion batteries.

关键词： Mo2C Hierarchical microflowers Li-ion batteries Anode Solid-state synthesis

Plant Diversity in City Parks under the Concept of Landscaping:A Case Study of Hefei City

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Journal of Landscape Research 2023年第4期15卷 73-78页

作者： gao miaomiao LI Yinan CHEN Jiaxin Anhui Xinhua University HefeiAnhui 230031China

Driven by the concept of landscaping,this paper analyzed the impact of plant diversity on landscaping function,arrangement methods and community structure by taking plot sampling method as the experimental axis and 3 urban parks in Hefei as the *** plots with the size of 20 m×20 m were selected for *** were 56 species of plants belonging to 50 genera and 42 families in the plots of Zhongshan Road City Park,48 species of plants belonging to 44 genera and 40 families in the plots of Four Seasons Flower Sea City Park,and 69 species of plants belonging to 57 genera and 45 families in the plots of Xiaoyaojin *** survey results show that there are following problems in city parks:lack of plant effectiveness,too homogeneous plant community,disharmony between landscape and environment,poor plant maintenance and lack of attention to ecological *** on this,the optimization measures are put forward:increasing evergreen plants to avoid no scenery in autumn,developing plants with excellent landscape effects and a variety of colorful plants,paying attention to the shaping of spatial structure and landscape pattern,regularly taking care of plants and their surrounding *** is expected to provide some reference for the construction and development of Hefei city parks,ensure the healthy and stable development of city parks,and provide ideas and methods for the improvement of plant landscaping in city parks.

关键词： Landscaping concept City park Plant diversity

Importance of Urban Wetland Parks under the Development of Green Healthy Cities:A Case Study of Nanjing City

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Journal of Landscape Research 2023年第5期15卷 58-63页

作者： CHEN Jiaxin gao miaomiao LI Quanjun LI Yinan Anhui Xinhua University HefeiAnhui 230031China

Wetlands are widely distributed all over the world,and have many wildlife resources,which are the main pieces of the puzzle for natural resource conservation and sustainable development on earth and have important *** this paper,through questionnaire survey,field research,literature review,etc.,importance weight analysis was conducted by using principal component analysis,and field survey and questionnaire were carried out to collect data on ecological environment function,environmental protection function,landscape beautification function,disaster prevention and mitigation function of urban *** problems in wetland parks of Nanjing were discussed,such as lack of awareness of landscape planning,deficient late management of wetland parks,weak ability of sustainable development,and unreasonable landscape layout and ***,corresponding solutions were proposed,such as adhering to the planning and design of urban wetland parks with green as the base and health as the basis,persisting in the construction of a wetland system with high biodiversity and near-natural characteristics,adhering to the principle of sustainable development,adopting the construction idea of symbiosis and circulation of urban wetland parks,strengthening education and publicity work,and paying attention to the organic combination of system protection and coordinated *** research can build a new development direction for the model of urban wetland parks and green healthy cities,and provide theoretical support for urban sustainable construction.

关键词： Urban wetland parks Green healthy cities Importance

Evaluation of Application Value of 30 Introduced Flowering Shrubs in Landscape in Hefei City Based on AHP Method

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Journal of Landscape Research 2024年第3期16卷 70-72,79页

作者： DAI Mengting ZHAO Zhiyan gao Feiyan gao miaomiao CHEN Jiaxin Department of Architecture and Landscape Design Anhui Xinhua UniversityHefeiAnhui 230088China

The application effect of 30 introduced flowering shrubs in landscape in Hefei City was comprehensively evaluated by the analytic hierarchy process(APH).A comprehensive evaluation model was established by using factors such as plant type,resistance and drought tolerance of introduced flowering *** results show that the application effect of grade-I introduced flowering shrubs(including 12 kinds,***)was the best(j≥2.6),and that of grade-II introduced flowering shrubs(including 14 kinds,***×grandiflora‘Francis Mason’)was better(2.2≤j<2.6),while that of grade-III introduced flowering shrubs(including 4 kinds,***×vicaryi)was moderate(j<2.2).The evaluation results can provide reference for the application effect of introduced flowering shrubs in landscape in Hefei City.

关键词： Introduced flowering shrubs Landscape effect Comprehensive evaluation Analytic hierarchy process

Multi boron-doping effects in hard carbon toward enhanced sodium ion storage

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Journal of Energy Chemistry 2025年第1期100卷 730-738页

作者： Peng Zheng Wang Zhou Ying Mo Biao Zheng miaomiao Han Qin Zhong Wenwen Yang Peng gao Lezhi Yang Jilei Liu College of Materials Science and Engineering Hunan Joint International Laboratory of Advanced Materials and Technology for Clean Energy Hunan Province Key Laboratory for Advanced Carbon Materials and Applied Technology Hunan University Greater Bay Area Institute for Innovation Hunan University Changsha Research Institute of Mining & Metallurgy Co. LTD.

Hard carbon （HC） has been considered as promising anode material for sodium-ion batteries （SIBs）.The optimization of hard carbon’s microstructure and solid electrolyte interface （SEI） property are demonstrated effective in enhancing the Na+storage capability,however,a one-step regulation strategy to achieve simultaneous multi-scale structures optimization is highly ***,we have systematically investigated the effects of boron doping on hard carbon’s microstructure and interface chemistry.A variety of structure characterizations show that appropriate amount of boron doping can increase the size of closed pores via rearrangement of carbon layers with improved graphitization degree,which provides more Na+storage ***-situ Fourier transform infrared spectroscopy/electrochemical impedance spectroscopy （FTIR/EIS） and X-ray photoelectron spectroscopy （XPS） analysis demonstrate the presence of more BC3and less B–C–O structures that result in enhanced ion diffusion kinetics and the formation of inorganic rich and robust SEI,which leads to facilitated charge transfer and excellent rate *** a result,the hard carbon anode with optimized boron doping content exhibits enhanced rate and cycling *** general,this work unravels the critical role of boron doping in optimizing the pore structure,interface chemistry and diffusion kinetics of hard carbon,which enables rational design of sodium-ion battery anode with enhanced Na+storage performance.

关键词： X ray photoelectron spectroscopy

衍生金融工具会计准则的最新国际发展与国内趋同

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金融发展研究 2015年第4期 52-56页

作者：高苗苗复旦大学中国金融期货交易所上海200120

由于衍生金融工具自身的复杂性和动态性,其相关会计准则应当如何确认、计量和披露,才能在更好地服务企业风险管理的同时,及时传递信息、规范市场运作,是摆在国内外准则制定部门面前的重大课题。研究表明:衍生金融工具会计准则会对债务... 详细信息

由于衍生金融工具自身的复杂性和动态性,其相关会计准则应当如何确认、计量和披露,才能在更好地服务企业风险管理的同时,及时传递信息、规范市场运作,是摆在国内外准则制定部门面前的重大课题。研究表明:衍生金融工具会计准则会对债务合约、薪酬合约、市场反应、管制等产生影响,从而直接或间接影响管理层决策以及企业行为,不合适的准则规定会严重阻碍衍生品市场功能的发挥。国际会计准则委员会近年来颁布和修订了若干相关会计准则,包括金融工具准则、套期保值准则、金融工具列报准则、公允价值计量准则等,我国财政部也正在保持逐步趋同。我国应尽快完成套期保值会计准则的国际趋同、评估期货公司可能受到的影响、强化期货及其他衍生品的信息披露,从而优化金融市场环境,提升企业估值水平。

关键词：衍生品会计准则金融工具风险管理

长江中游城市群旅游经济空间特征分析——基于社会网络分析视角

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学术研究 2019年第4期 43-48,84页

作者：王磊高苗苗武汉大学中国中部发展研究院/区域与城乡发展研究院

在旅游需求日益增加的背景下,旅游业的科学发展愈显重要。通过社会网络分析的方法,基于2016年中国银联的刷卡消费数据研究,可得出长江中游城市群旅游消费联系的空间特征有以下几方面。第一,武汉、长沙和南昌三个省会城市与其他城市的旅... 详细信息

在旅游需求日益增加的背景下,旅游业的科学发展愈显重要。通过社会网络分析的方法,基于2016年中国银联的刷卡消费数据研究,可得出长江中游城市群旅游消费联系的空间特征有以下几方面。第一,武汉、长沙和南昌三个省会城市与其他城市的旅游消费联系最为紧密,与九江、上饶、荆州、株洲等城市共同构成长江中游城市群旅游消费网络的核心区。第二,相比于前人研究,长江中游城市群的整体旅游网络密度有所提高,旅游经济联系日趋紧密;而且基本形成了以武汉、长沙、南昌为中心的三个子结构,表现出明显的省际边界效应;但同时部分城市的第二大消费流流入其他省份城市中,表现出突破行政区划的趋势。第三,长江中游城市群整体可分为8个凝聚子群,子群划分与行政区划和地区文化背景密切相关。同一省份内子群联系更为紧密,但整体而言凝聚子群密度值普遍偏小,子群之间联系较为薄弱,旅游一体化程度仍有待提升。最后提出尝试从省际毗邻区域入手,加强省际交通和文化联系,打破行政壁垒;增强武汉、长沙与南昌的旅游联系,由点到轴,由轴及面,增强城市群之间的旅游交流与合作,推进长江中游城市群旅游一体化进程。

关键词：旅游消费网络社会网络分析长江中游城市群