共查询到20条相似文献，搜索用时 625 毫秒
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根据野外施工特点,论述了建立健全钻探机械修理工艺规程的必要性。并介绍了包括采用先进维修手段,建立维修制和责任制;合理确定保养周期,建立健全保养制度,提高维修质量为内容的钻探机械修理工艺规程,以实现降低生产成本的目的。 相似文献
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《岩土力学》2015,(10):2945-2945
著译者：李世华,小16开本,602页,平膜勒口,定价：98元,出版单位：中国建筑工业出版社,版次：第2版,出版时间：2015年8月,标准书号：978-7-112-18055-4,征订号：27264。
内容简介：本书包括的主要内容有：道路桥梁的检测技术（道路的检测技术、桥梁的检测技术、隧道的检测技术）;道路的维修技术（道路维修的机械设备、道路路基的维修技术、路面不平整的原因及处理技术、水泥混凝土路面的维修技术、沥青混凝土路面的维修技术）：桥梁维修技术（桥梁维修概论、桥梁结构表层的维修技术、桥梁结构裂纹的修补技术、梁式桥上部结构的维修加固技术、桥梁下部结构的维修与加固技术、拱桥的维修与加固技术、桥梁附属结构物的维修技术）等。 相似文献
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用实例介绍了对P－E5000原子吸收光谱仪的某些部件的替代和电路的改动，以及钨灯电路故障的维修。通过零部件的替代，使仪器得到及时维修，并且降低了成本。 相似文献
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从安康汉滨区水利工程建设管理和维修养护现状入手,针对行业内长期存在的"重建轻管"现象,结合实践工作经验对该现象给水利工作造成的损害进行了分析,提出了"规划建设是基础,维修养护是关键"的工作理念,并着重从规划建设、机制创新、队伍建设、部门协作、养护作业等方面进行研究,就同步推进水利工程建设管理和维修养护提出相应对策和建议。 相似文献
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主要介绍在钻头设计制造中对数控设备的维修和故障排除经验。概述了数控设备的故障分类,分析了故障原因及其排除方法。这将为数控设备的管理人员、使用和维修人员提供一些方法和思路。 相似文献
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针对青藏线格拉段高原、冻土的特点就工务维修养护模式进行了探讨研究, 分析适用于青藏铁路线路维修养护的管理方式、机构设置、机具配备及组织定员原则, 提出了劳动保护措施、用工制度设想以及需进一步研究的问题. 相似文献
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针对青藏线格拉段高原、冻土的特点就工务维修养护模式进行了探讨研究，分析适用于青藏铁路线路维修养护的管理方式、机构设置、机具配备及组织定员原则，提出了劳动保护措施、用工制度设想以及需进一步研究的问题。 相似文献
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Emily Keeble David I. Whiteside Michael J. Benton 《Proceedings of the Geologists' Association. Geologists' Association》2018,129(2):99-119
Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco. 相似文献
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Gilles Serge Odin 《Comptes Rendus Geoscience》2002,334(6):409-414
Lithostratigraphy, physicochemical stratigraphy, biostratigraphy, and geochronology of the 77–70 Ma old series bracketing the Campanian–Maastrichtian boundary have been investigated by 70 experts. For the first time, direct relationships between macro- and microfossils have been established, as well as direct and indirect relationships between chemo-physical and biostratigraphical tools. A combination of criteria for selecting the boundary level, duration estimates, uncertainties on durations and on the location of biohorizons have been considered; new chronostratigraphic units are proposed. The geological site at Tercis is accepted by the Commission on Stratigraphy as the international reference for the stratigraphy of the studied interval. To cite this article: G.S. Odin, C. R. Geoscience 334 (2002) 409–414. 相似文献
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The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts 总被引：4，自引：0，他引：4
The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H2O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H2O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species. 相似文献
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Muriel Rocher Stéphane Baize Stéphane Jaillet Edward Marc Cushing Yannick Lozac&#x;h Francis Lemeille 《Comptes Rendus Geoscience》2003,335(8):701-708
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003). 相似文献
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正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level 相似文献
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正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7), 相似文献
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正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci- 相似文献
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正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli- 相似文献
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正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.) 相似文献