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符号学视野中新闻真实呈现的历史变迁与内在规律 被引量:5
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作者 杨保军 刘泽溪 《当代传播》 CSSCI 北大核心 2022年第2期11-16,34,共7页
新闻真实是新闻实践的核心所在,新闻真实问题是新闻理论研究中持久的重要问题。随着媒介生态环境的迅速变化,人们不断以新的理论、新的方法探究新闻真实问题,以解决新闻真实实现中面临的一些新困境。本文在既有相关研究成果基础上,从符... 新闻真实是新闻实践的核心所在,新闻真实问题是新闻理论研究中持久的重要问题。随着媒介生态环境的迅速变化,人们不断以新的理论、新的方法探究新闻真实问题,以解决新闻真实实现中面临的一些新困境。本文在既有相关研究成果基础上,从符号学视野出发,揭示了新闻真实作为符号真实的中介性、文本性和建构性特征,并在历史视野中,考察分析了符号形式与新闻真实呈现之间的基本关系,进而在此基础上总结概括了符号系统与新闻真实呈现之间的主要规律:呈现或表征新闻真实的符号系统日益丰富,呈现或表征新闻真实的符号方式越来越趋于具象化与抽象化的统一,符号呈现或表征新闻真实的结果越来越逼近新闻事实的本源状态。 展开更多
关键词 新闻真实 符号学视角 符号系统演化 演化规律
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Infinite Sequence Soliton-Like Exact Solutions of (2 + 1)-Dimensional Breaking Soliton Equation 被引量:19
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作者 Taogetusang Sirendaoerji 李姝敏 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第6期949-954,共6页
To seek new infinite sequence soliton-like exact solutions to nonlinear evolution equations (NEE(s)), by developing two characteristics of construction and mechanization on auxiliary equation method, the second ki... To seek new infinite sequence soliton-like exact solutions to nonlinear evolution equations (NEE(s)), by developing two characteristics of construction and mechanization on auxiliary equation method, the second kind of elliptie equation is highly studied and new type solutions and Backlund transformation are obtained. Then (2+ l )-dimensional breaking soliton equation is chosen as an example and its infinite sequence soliton-like exact solutions are constructed with the help of symbolic computation system Mathematica, which include infinite sequence smooth soliton-like solutions of Jacobi elliptic type, infinite sequence compact soliton solutions of Jacobi elliptic type and infinite sequence peak soliton solutions of exponential function type and triangular function type. 展开更多
关键词 the second kind of elliptic equation Backlund transformation nonlinear evolution equation infi-nite sequence soliton-like exact solution
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Symbolic Computations and Exact and Explicit Solutions of Some Nonlinear Evolution Equations in Mathematical Physics 被引量:1
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作者 Turgut zis Imail Aslan 《Communications in Theoretical Physics》 SCIE CAS CSCD 2009年第4期577-580,共4页
With the aid of symbolic computation system Mathematica, several explicit solutions for Fisher's equation and CKdV equation are constructed by utilizing an auxiliary equation method, the so called G′/G-expansion met... With the aid of symbolic computation system Mathematica, several explicit solutions for Fisher's equation and CKdV equation are constructed by utilizing an auxiliary equation method, the so called G′/G-expansion method, where the new and more general forms of solutions are also constructed. When the parameters are taken as special values, the previously known solutions are recovered. 展开更多
关键词 auxiliary equation method G′/G-expansion method traveling wave solutions fisher equation CKdV equation exact solution
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