排序方式: 共有46条查询结果,搜索用时 15 毫秒
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随着气象信息业务建设工程 ( 92 1 0工程 )的建设完成 ,全国各地 (市 )级以上建成了以VAST卫星通信为主 ,地面通信为辅的计算机广域网络系统和话音系统 ,实现了气象信息高速、准确的网络化传输。所以对节点机的维护成了当前不可忽视的重要问题 ,但是这个系统的维护远比其他操作系统困难和复杂。下面就此谈几点经验。1 UNIX操作系统的后备口令根root口令长时间不用以致忘记或者不正常操作丢失或被他人无意中更改 ,后果是极其严重的。所以制作多用户UNIX操作系统超级用户root的后备用户口令是丢失超级用户口令后挽救UN… 相似文献
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Energy Field Adjustment and Hydrocarbon Phase Evolution in Sinian-Lower Paleozoic,Sichuan Basin 总被引:5,自引:0,他引:5
The Sinian-Lower Paleozoic (also called the lower association) in Sichuan (四川) basin has undergone geologic evolution for several hundred million years.The subsidence history of the Sinian-Lower Paleozoic can be divided into four stages:the stable subsidence during Cambrian and Silurian; the uplift and denudation during Devonian and Carboniferous; the subsidence (main process)during Permian to Late Cretaceous; and the rapid uplift and denudation since Late Cretaceous.The later two stages could be regarded as critical factors for the development of oil and gas in the lower association.The evolution of energy field such as temperature,pressure,and hydrocarbon phase in the lower association during the deep burial and uplift in the third stage might be induced as follows:(1)super-high pressure was developed during oil-cracking,previous super-high pressure was sustained,or changed as normal pressure during late uplift; (2) temperature increased with deep burial during persistent subsidence and decreased during uplift in late stage; (3) as a response to the change of the energy field,hydrocarbon phase experienced a series of changes such as organic material (solid),oil (liquid),oil-cracking gas (gaseous) + bitumen (solid) + abnormal high pressure,gas cap gas with super-high pressure (gaseous) + bitumen (solid) + water soluble gas (liquid),and gas in pool (gaseous) + water soluble gas (liquid) + bitumen (solid).The restoration of hydrocarbon phase evolution is of important value for the exploration of natural gas in the Sinian-Lower Paleozoic in Sichuan basin. 相似文献
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将天气学方法与预报员经验紧密结合,在深入分析环流背景和环境场特征的基础上,提出了以暖气团参数为主的冰雹预报方案,经两年实践检验,明显提高了南充地区春末夏初冰雹预报的精力能力。 相似文献
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新疆准南地区低电阻率油气层测井识别 总被引:4,自引:0,他引:4
新疆准南地区吐谷鲁构造油气储层电阻率低,与水层电阻率差异不大。因此,用常规测井解释方法难以对它们作出有效区分。这里先通过对多种测井信息的综合分析,初步摸清测井与不同类别油气储层之间复杂的非线性映射关系,再用神经网络法建模并预测,取得了良好的效果,较好地解决了该区油、气、水层的识别难题。 相似文献
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