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考虑滑面材质的碎屑流试验堆积特征分析
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作者 何玉琼 董文杰 +2 位作者 唐磊 孙荣 张家明 《辽宁工程技术大学学报(自然科学版)》 北大核心 2023年第6期686-692,共7页
为分析高速远程滑坡运动与堆积特征,在室内设置物理试验模型,设计级配、坡角、碎屑流质量、滑面材质4种因素,分析各因素对碎屑流堆积特征的影响。研究结果表明:坡角减小、滑面更粗糙使部分颗粒堆积或滞留于坡面,颗粒堆积特征与颗粒完全... 为分析高速远程滑坡运动与堆积特征,在室内设置物理试验模型,设计级配、坡角、碎屑流质量、滑面材质4种因素,分析各因素对碎屑流堆积特征的影响。研究结果表明:坡角减小、滑面更粗糙使部分颗粒堆积或滞留于坡面,颗粒堆积特征与颗粒完全堆积于坡底时相比存在差异;滑面材质与冲程等堆积特征基本呈负相关,坡角与堆积特征基本呈正相关,二者对堆积特征影响最大;碎屑流质量与堆积特征基本呈负相关,对颗粒堆积特征分布影响较小;级配与颗粒堆积特征无明显相关性。 展开更多
关键词 高速远程滑坡 碎屑流 模型试验 滑面材质 堆积形态
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论环境安全问题 被引量:61
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作者 蔡守秋 《安全与环境学报》 CAS CSCD 2001年第5期28-32,共5页
将环境安全分为生产技术性的环境安全和社会政治性的环境安全两类 ,认为广义的环境安全是指人类赖以生存发展的环境处于一种不受污染和破坏的安全状态 ,或者说人类和世界处于一种不受环境污染和环境破坏的危害的良好状态 ,它表示自然生... 将环境安全分为生产技术性的环境安全和社会政治性的环境安全两类 ,认为广义的环境安全是指人类赖以生存发展的环境处于一种不受污染和破坏的安全状态 ,或者说人类和世界处于一种不受环境污染和环境破坏的危害的良好状态 ,它表示自然生态环境和人类生态意义上的生存和发展的风险大小。分析了当代环境安全问题的严重性和主要表现 ,包括劳动环境、生活环境和生态环境的安全问题 ,以及环境问题在传统的国家安全和军事活动领域的反映。认为环境安全是可持续发展观的一个核心观点 ;可持续发展要求满足全体人民的基本需要 ,而维护环境安全正是人们的一种基本需要。分析了外国、国际社会和中国对环境安全问题的法律控制概况 。 展开更多
关键词 环境安全问题 环境安全法 法律控制 自然技术科学 人文社会科学
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Epitome of Research on the History of Science and Technology in China:A Review of the Book Series History of Science and Technology in Pre-Modern China in Comparison with Needham’s Science and Civilisation in China 被引量:1
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作者 Dai Wusan 《Chinese Annals of History of Science and Technology》 2019年第1期87-99,共13页
The early twenty-first century witnessed the publication of the book series Zhongguo kexue jishu shi中国科学技术史(History of science and technology in pre-modern China),which was initiated and organized by the Instit... The early twenty-first century witnessed the publication of the book series Zhongguo kexue jishu shi中国科学技术史(History of science and technology in pre-modern China),which was initiated and organized by the Institute for the History of Natural Sciences,Chinese Academy of Sciences,and compiled by a multitude of Chinese scholars.In comparison with Science and Civilisation in China by Dr.Joseph Needham,Zhongguo kexue jishu shi is superior in the layout characteristics,literature collection,research and explication,field investigation,and simulation experiments. 展开更多
关键词 history of science and technology in China the Institute for the History of Natural Sciences Joseph Needham
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The Disastrous Lifeworld: A Phenomenological Consideration of Safety, Resilience, and Vulnerability
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作者 Tetsuya Kono 《Journal of Philosophy Study》 2013年第1期52-63,共12页
The lifeworld is, according to Husserl, the horizon of all our experiences, in the sense that it is the background environment of human being's competences, practices, and attitudes. The lifewofld is the intersubject... The lifeworld is, according to Husserl, the horizon of all our experiences, in the sense that it is the background environment of human being's competences, practices, and attitudes. The lifewofld is the intersubjective, pre-given in the ontie sense, and immediately perceived world of everyday life. Although Husserl has distinguished the lifeworld from the objective world that natural science describes with mathematical methods, we cannot divide the world on the practical level into the perceived world of ordinary life and the scientific world. The characteristic of human beings is that they live in the environment which they have enormously changed. Modem science has accelerated this tendency: the contemporary world is constructed so deeply scientifically and technologically. Accordingly, as Ulrich Beck pointed out, the risk of the technologically constructed world is often invisible/unperceivable. The disaster at Fukushima nuclear power plants is a terrible testament of this kind of risk. In order for a land to become the lifeworld of meaningful human interactions, the land should be first of all safe and livable for all of us. The risk calculation made by Tokyo Electric Power Company was shown to be sloppy and deceptive. The contemporary techno-science should be democratically governed and watched by all kinds of stakeholders, and never be left it to the specialists of science. For re-establishing the livable and sustainable lifeworld, safety, resilience, and vulnerability should be the fundamental values. And, the autonomy of the local residents, including the most vulnerable people, through the democratization of the techno-science must be the fundamental value to establish and protect such a safe environment. 展开更多
关键词 PHENOMENOLOGY Fukushima Disaster LIFEWORLD technology risk environment
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Progress of Glaciology and Geocryology Incubation Program of the National Natural Science Foundation of China
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作者 Cheng Guodong Zhang Yaonan Wang Zhengwen 《Science Foundation in China》 CAS 2007年第1期20-23,共4页
The 10^th5-year Plan for National Natural Science Foundation of China(NSFC)for fostering competent research teams and highly qualified scholars in fundamental research in glaciology and geocryology was based on the ... The 10^th5-year Plan for National Natural Science Foundation of China(NSFC)for fostering competent research teams and highly qualified scholars in fundamental research in glaciology and geocryology was based on the strategy of incubating "competitive, problem-solving oriented and motivated fledgling scientists,who can effectively lead and greatly advance the aimed subjects and conduct the cutting edge research".This principle has been playing crucial roles in restructuring the team aiming at world-first-class research projects and at solving critical problems in national key projects.It was under the guidance of this strategy that the key research team for mitigating the challenging and differential frost and thaw hazards along the Qinghai-Tibet Railway(QTR)had been formed,that a strong group focused on the cryosphere (snow, ice and permafrost)000research was restablished and enhanced.These accomplishments have facilitated the formation and growth of highly motivated competitive research teams on comprehensive and integrated fundamental research,which promoted,intensified,and expanded the research programs in glaciology and geocryology. 展开更多
关键词 GLACIOLOGY GEOCRYOLOGY research projects/programs incubation and motivation achievemerits
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SYSTEMS WITH COMPLEXITY
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作者 WANGChenghong ZHANGLijun 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2004年第1期147-152,共6页
Science of Complexity is a newly emerging branch of natural science. Althoughwe still haven't a precise definition, there are some principles for justifying whether a systemis a complex system. The purpose of this... Science of Complexity is a newly emerging branch of natural science. Althoughwe still haven't a precise definition, there are some principles for justifying whether a systemis a complex system. The purpose of this article is to reveal some of such principles. Onthe basis of them, the concept of a system with complexity is proposed. They may helpus to distinguish a real complex system from complicated objects in common sense. Thenwe propose some fundamental problems faced by the study of systems with complexity. 展开更多
关键词 system with complexity EMERGENCE self-organized criticality agent-basedmodelling control
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