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Detecting the distribution of and public attitudes to charismatic alien species based on media coverage

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Avian Research 2024年第3期15卷 379-384页

作者： Yuexuan Liu Ruichang Sun Bo Li Zhijun Ma Shanghai Institute of Infectious Disease and Biosecurity Ministry of Education Key Laboratory for Biodiversity Science and Ecological EngineeringNational Observations and Research Station for Wetland Ecosystems of the Yangtze Estuaryand Institute of Eco-Chongming(SIEC)School of Life SciencesFudan UniversityShanghai200433China Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology and Centre for Invasion Biology Institute of BiodiversitySchool of Ecology and Environmental ScienceYunnan UniversityKunming650504YunnanChina

Charismatic species are often reported by the media,providing information for detecting population status and public *** identify the number and distribution of free-living Black Swan(Cygnus atratus),a charismatic alien species in Chinese mainland and to detect the public and the media attitudes to the species,we analyzed the reports and emotional tendency from media coverage in 2000-2022 using manual reading,crawler extraction and latent Dirichlet allocation.A total of 6654 Black Swans were reported at 711 sites,including 147 individuals at 30 nature *** breeding was reported at one-fourth of the total sites,including five nature *** proportion of positive emotional tendency to Black Swans was overwhelming in the reports and was higher than that to alien species in general,suggesting that the public and the media are unaware of the risk of biological *** management of invasive species requires the media clarifies the invasion risk of charismatic alien *** the unity between the harmfulness of abstract concept of alien species and the charisma of a specific alien species among the public help effective management.

关键词： Alien species Biological invasion Cygnus atratus Emotional tendency Invasive species media coverage Public perception

Dynamics of a stochastic rumor propagation model incorporating media coverage and driven by Lévy noise

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Chinese Physics B 2021年第8期30卷 182-190页

作者： Liang-An Huo Ya-Fang Dong Ting-Ting Lin Business School University of Shanghai for Science and TechnologyShanghai 200093China School of Electrical and Information Engineering Shanghai Jiao Tong UniversityShanghai 200240China

With the development of information technology,rumors propagate faster and more widely than in the *** this paper,a stochastic rumor propagation model incorporating media coverage and driven by Lévy noise is *** global positivity of the solution process is proved,and further the basic reproductive number R_(0) is *** R_(0)1,the rumor will keep spreading and the system will oscillate randomly near the rumor equilibrium point of the deterministic *** results show that the oscillation amplitude is related to the disturbance of the *** addition,increasing media coverage can effectively reduce the final spread of ***,the above results are verified by numerical simulation.

关键词： rumor propagation stochastic process Lévy jump media coverage

Dynamics and near-optimal control in a stochastic rumor propagation model incorporating media coverage and Lévy noise

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Chinese Physics B 2022年第3期31卷 146-159页

作者： Liang'an Huo Yafang Dong Business School University of Shanghai for Science and TechnologyShanghai 200093China

The appearance of rumors intensifies people’s panic and affects social stability. How to control the spread of rumors has become an important issue which is worth studying. In order to more accurately reflect the actual situation in the real world, a stochastic model incorporating media coverage and Lévy noise is proposed to describe the dynamic process of rumor propagation. By introducing two control strategies of popular science education and media coverage in an emergency event, an near-optimal control problem that minimizes the influence and control cost of rumor propagation is *** conditions for near-optimal control of the model are established by using a Hamiltonian function. Then the necessary conditions for near-optimal control are obtained by using the Pontryagin maximum principle. Finally, the effect of popular science education, media coverage and Lévy noise on rumor propagation process control is verified by numerical simulation.

关键词： rumor propagation near-optimal control popular science education media coverage Lévy noise

Global dynamics and optimal control of an influenza model with vaccination, media coverage and treatment

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International Journal of Biomathematics 2017年第5期10卷 159-183页

作者： Lianwen Wang Zhijun Liu Dashun Xu Xinan Zhang School of Mathematics and Statistics Central China Normal University 430079 Wuhan P. R. China Department of Mathematics Hubei University for Nationalities 445000 Enshi Hubei P. R. China Department of Mathematics Southern Illinois University Carbondale IL 62901 USA School of Mathematics and Statistics Central China Normal University 530079 Wuhan P. R. China

In this work, in order to identify the most effective measure and combinations of several measures to control influenza spread, we propose an SVEIAR influenza model with imperfect vaccination, media coverage and antiviral treatment. The global dynamics of the model is explored. Sensitivity analysis of the basic reproduction number and the endemic equilibrium is conducted to evaluate the effectiveness of influenza control measures. Purthermore, an optimal control problem incorporating the three measures is formulated to design optimal control strategies for influenza. The cost-effectiveness analysis reveals that combining the three measures is the most cost-effective among the strategies considered. Numerical simulations show that media propaganda can play a dominant role in curbing influenza transmission.

关键词： SVEIAR influenza model optimal control media coverage vaccination antiviral treatment.

The impact of media coverage with a piecewise transmission rate in the spread of diseases

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International Journal of Biomathematics 2017年第1期10卷 35-44页

作者： Maoxing Liu Lixia Zuo Department of Mathematics North University of China Taiyuan Shanxi 030051 P. R. China

A three-dimensional compartmental model with media coverage is proposed to describe the real characteristics of its impact in the spread of infectious diseases in a given region. A piecewise continuous transmission rate is introduced to describe that media coverage exhibits its effect only when the number of the infected exceeds a certain critical level. Further, it is assumed that the impact of media coverage on the contact transmission is described by an exponential decreasing factor. Stability analysis of the model shows that the disease-free equilibrium is globally asymptotically stable if the basic reproduction number is less than unity. On the other hand, when the basic reproduction number is greater than unity and media coverage impact is sufficiently small, a unique endemic equilibrium exists, which is globally asymptotically stable.

关键词： Infectious diseases media coverage piecewise transmission rate global stabi-lity.

EFFECTS OF media coverage AND TEMPORARY IMMUNITY TO A STOCHASTIC SEIR EPIDEMIC MODEL

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Annals of Applied Mathematics 2020年第4期36卷 442-458页

作者： Jing Zhang Fengying Wei College of Mathematics and Computer Science Fuzhou UniversityFuzhou 350116FujianPR China Key Laboratory of Operations Research and Control of Universities in Fujian Fuzhou UniversitgFuzhou 350116FujianPR China

A type of SEIR epidemic model with media coverage and temporary immunity is investigated in this paper. The existence and uniqueness of the global positive solution with any positive initial value is proved. Under the condition R0s> 1, we prove that the disease is persistent in the mean for a long run. Furthermore, by constructing suitable Lyapunov functions, some sufficient conditions that guarantee the existence of stationary distribution are derived. We also obtain that, if the condition R0e< 1 is satisfied, then the disease is extinct with an exponential rate. As a consequence, some examples and numerical simulation are demonstrated to show the validity and feasibility of the theoretical results.

关键词： stochastic SEIR model media coverage temporary immunity persistence extinction stationary distribution

An analysis of media coverages of Diaoyu islands dispute from American media and Korean media

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校园英语 2017年第22期 197-198页

作者：卢杨夏蒙西安医学院

In the East Asia, the dispute since early 1970 s between China and Japan over Diaoyu Islands in Chinese or "Senkaku Islands" in Japanese has become a typical example of this irredentist arguments between nations. Viewers were bombarded with considerable continuous news report in different types of media worldwide. By critically analysing and making contrast with media coverages from the United States and Korea, this study serves to explore in depth the different attitudes and ways of American and Korean media coverages when reporting controversy dispute between states.

关键词： media coverage CDA discourse language

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媒体报道与资产定价：研究综述

Business and financial information integration and voluntary management earnings forecasts

财务与会计导刊（理论版） 2017年第8期 24-39页

作者：陈泽艺李常青

近年来，随着媒体和资本市场的发展，财务学研究出现新的研究动向，越来越多的学者关注媒体报道对公司股票价格的影响。为了更好地把握研究现状，本文系统地梳理了媒体报道与资产定价研究领域的国内外相关文献，总结现有研究的分析框架... 详细信息

近年来，随着媒体和资本市场的发展，财务学研究出现新的研究动向，越来越多的学者关注媒体报道对公司股票价格的影响。为了更好地把握研究现状，本文系统地梳理了媒体报道与资产定价研究领域的国内外相关文献，总结现有研究的分析框架，并从信息不对称、行为金融、公司治理溢价和媒体报道偏差四个视角系统地回顾、评述了媒体报道对资产定价影响的研究成果。在此基础上，提出了进一步研究的思路和建议。

关键词：媒体报道资产定价媒体报道偏差 media coverage asset pricing media coverage bias

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China Journal of Accounting Research 2020年第3期13卷 291-307页

作者： Jing Huang Zipeng Mei Zhe Li Central University of Finance and Economics China China Management Accounting Research Center China

In this study,the impact of business and financial information integration(BFⅡ)on the voluntary management earnings forecasts(VMEFs)of listed firms in China between 2008 and 2018 is *** on litigation cost and ability signaling theories,we find that the adoption of BFⅡencourages top managers to disclose ***Ⅱfirms are identified through the textual analysis of management discussion and analysis(MD&A)reports,and the empirical results indicate that BFⅡfirms have a higher probability and frequency of issuing VMEFs than non-BFⅡ*** results remain robust after we identify causality by applying a propensity score matching and difference-in-differences(PSM-DID)test and use an alternate measure of BFⅡ.Further tests show that BFⅡfirms issue more accurate VMEFs and are able to issue them at an earlier *** also find that the positive relationship between BFⅡand VMEFs is weakened if the media expresses concern about the uncertainty of BFⅡadoption.

关键词： Business and financial information integration Voluntary management earnings forecasts(VMEF) Textual analysis Management discussion and analysis(MD&A) media coverage