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几丁虫、笔石和虫牙反射率——加拿大魁北克安第科斯蒂岛奥陶系和志留系中镜质体和焦沥青反射率的一种替代物
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作者 r.bertrand Y.Héroux 裴存民 《地质地球化学》 CSCD 北大核心 1989年第2期51-56,共6页
由于下古生界地层中缺乏镜质体,焦沥青的反射率被用作热成熟作用的指标。根据一种制备有机质的新技术,人们有可能区分动物碎屑和固体沥青(包括焦沥青)的类型,从而获得比较精确的反射率直方图。对安第科斯蒂岛奥陶-志留系地层中有机质的... 由于下古生界地层中缺乏镜质体,焦沥青的反射率被用作热成熟作用的指标。根据一种制备有机质的新技术,人们有可能区分动物碎屑和固体沥青(包括焦沥青)的类型,从而获得比较精确的反射率直方图。对安第科斯蒂岛奥陶-志留系地层中有机质的研究表明,动物碎屑的反射率不同于固体沥青,而且几丁虫、笔石和虫牙,每组动物碎屑随着深度的增加,都有各自的反射率演化途径。这三组动物碎屑的演化曲线在对数标尺上是线性、强相关且收敛的。但是,固体沥青的反射率在所研究的范围内是非线性的;固体沥青的反射率只是在反射率大于0.75%处才变成线性的。将动物碎屑和固体沥青之间的关系与镜质体-固体沥青的相关性进行对比后表明,安第科斯蒂岛盆地的镜质体演化线应当与几丁虫和笔石的演化线近于平行,且在1—2%的范围内低0.4—0.8%。然而,虫牙和镜质体在1%时应具有同样的反射率,而虫牙的反射率在镜质体反射率为2%时应稍高(0.2%)。 展开更多
关键词 奥陶-志留系 动物碎屑 反射率
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Human Factor in Flight Safety
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作者 HervéPoussin L.Rochas +1 位作者 T.Vallée r.bertrand 《Journal of Traffic and Transportation Engineering》 2018年第3期148-154,共7页
A chief goal of the launcher design philosophy is to build launchers offering operational efficiency and not that can be flown safely.Moreover,launch operator focuses the mission design on mission success criteria for... A chief goal of the launcher design philosophy is to build launchers offering operational efficiency and not that can be flown safely.Moreover,launch operator focuses the mission design on mission success criteria for the payload and often mitigates launch risks.These sole conditions clearly appear to be inadequate to ensure safety during a flight neither to be up to the safety challenges.Flight safety at CNES/CSG(Centre National d’Etudes Spatiales/Centre Spatial Guyanais)is considered to be a full part job,to be performed separately from the launcher mission.Dedicated ground operators,namely safety officers,who are independent from launcher teams,are ultimately responsible for ensuring the safety.During the flight of a launcher,they are in charge of interrupting actively,making use of a flight termination telecommand from ground,the erroneous flight of a launcher before it endangers people or properties.Human factor is therefore of fundamental importance in flight safety at CNES/CSG.After a quick overview of CNES/CSG,this paper,based on the flight safety way of operation and on the safety officers recruitment,instruction,training and certification,aims at declining how the human factor is handled throughout all flight safety activities. 展开更多
关键词 FLIGHT SAFETY LAUNCHER MISSION HUMAN FACTORS
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