1000 resultados para 316-053.7


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在山西省万家寨引黄入晋工程总干线 7#隧洞的开挖和衬砌的应力应变分析中 ,为确定土体c、Φ值和邓肯 -张模型参数 ,分别进行了加载试验和卸载试验 ,本文对用两种试验获得的模型参数进行有限元变形分析的结果进行比较。

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Trata das ações implementadas ao longo do ano de 1998 e início de 1999 que contribuíram para o estabelecimento de condições politicamente favoráveis para a discussão de problemas e o encaminhamento de soluções para as questões de interesse do setor agropecuário brasileiro.

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二十世纪八十年代,当比利时冶金研究中心(CRM)开发出CO_2激光毛化冷轧辊技术后,尝试用YAG激光进行轧辊毛化一直吸引着众多的研究者,这是因为YAG(1.06μm)激光波长比CO_2(10.6μm)激光波长短一个量级,材料对YAG激光有更高的吸收率,并用YAG激光可以聚焦到更小的光斑尺寸,同时使用电信号驱动的声光开关技术便于对毛化分布进行可设定控制。但是用传统声光调制的YAG激光虽然可以碇以很高的脉冲频率(>30kHz),但单脉冲有量仅为10mJ左右,难以达到辊面毛化粗糙度的要求,因此人们认为YAG激光用于毛化的主要困难是脉冲能量太小。

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Trata da Lei Orgânica da Assistência Social (Loas), Lei nº 8.742, de 7 de dezembro de 1993, que foi criada com o objetivo de garantir uma política de proteção a quem necessita.

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The 22nd Annual Symposium on Sea Turtle Biology and Conservation was held April 4-7, 2002 in Miami, Florida and hosted by the U.S. Fish and Wildlife Service. The 22nd symposium was the most globally diverse ever with 839 individuals from 73 countries attending the symposium and associated regional meetings. One third of the attendees were from outside the United States. This diverse attendance was made possible in large part because of substantial donations from The Packard Foundation, National Fish and Wildlife Foundation, National Marine Fisheries Service, U.S. Fish and Wildlife Service, Convention on Migratory Species, Oceanic Research Foundation, and International Sea Turtle Society which supported travel grants for 170 international travelers. (PDF contains 336 pages)

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As a Federal trust species, the well-being of the striped bass (Morone saxatilis) population along the Eastern Seaboard is of major concern to resource users. Striped bass are an extremely valuable commercial and recreational resource. As a principal piscivore in Chesapeake Bay, striped bass directly or indirectly interact with multiple trophic levels within the ecosystem and are therefore very sensitive to biotic and abiotic ecosystem changes. For reasons that have yet to be defined, the species has a high intrinsic susceptibility to mycobacteriosis. This disease has been impacting Chesapeake Bay striped bass since at least the 1980s as indicated by archived tissue samples. However, it was not until heightened incidences of fish with skin lesions in the Pocomoke River and other tributaries of the Chesapeake Bay were reported in the summer and fall of 1996 and 1997 that a great deal of public and scientific interest was stimulated about concerns for fish disease in the Bay. (PDF contains 50 pages)

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(PDF contains 4 pages.)