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信息运动十大规律 被引量:21
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作者 蒋永福 李集 《情报资料工作》 CSSCI 北大核心 1998年第5期18-21,共4页
文章概括论述了信息世界中存在的十个方面的统计性规律:表征律、运载律、守恒律、扩散—聚合律、衰减律、选择律、势差律、“马太”律、省力律。
关键词 信息世界 信息规 表征 运载律 守恒
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论体育信息运动的基本规律 被引量:2
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作者 姚明旭 王尊荣 《安徽体育科技》 2003年第1期132-133,共2页
主要论述了体育信息的基本规律,着重从体育信息的表征律、运载律、守恒律等七个方面进行了阐述,表明了体育信息的运行、传媒、收集都有其自身的内在规律。
关键词 体育信息 运动规 表征 运载律 守恒 势差
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Movement laws and mechanical characteristics of top coal in blasting face
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作者 SUN Guang-zhong JIANG Zhi-gang 《Journal of Coal Science & Engineering(China)》 2010年第4期352-355,共4页
Measuring the top coal movement and abutment pressure about Teaching ThirdMine that belonged to the National Energy Investment and Development.It shows that thetop coal's strong compression occurs 6 m in front of ... Measuring the top coal movement and abutment pressure about Teaching ThirdMine that belonged to the National Energy Investment and Development.It shows that thetop coal's strong compression occurs 6 m in front of the face, the top coal is in front of sideabutment pressure concentration increase area at this time, and the top coal horizontaldisplacement increase rapidly.Also analyzed the top coal mechanical properties, and thetop coal under abutment pressure turned into block state.Finally, analyzed the top coalfailure mechanism and the structure of the mechanical model, and also made a theoreticalanalysis of the top coal's ultimate bearing capacity. 展开更多
关键词 top coal caving abutment pressure mechanical model ultimate bearing capacity
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