共查询到18条相似文献，搜索用时 109 毫秒
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叙述了地震科技档案的重要性,针对当前地震科技档案归档工作中存在的制度不健全、档案原始件归档难等问题,提出了全面提高档案意识、领导重视、全员参与、及时归档等几点建议,以避免档案流失,做到资源共享,使科技档案更好地服务于防震减灾事业。 相似文献
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地震观测数字化使地震观测资料的载体发生了根本转变。数字化地震观测资料的归档与管理就成为科技档案部门目前急待解决的一个问题,要做好这项工作,就应加强档案法规的宣传力度,建立健全归档管理各项规章制度,确定归档管理运行机制、收集原则、收集范围、分类编号方法、保管、利用等现代管理方法,对数字化地震观测资料进行科学的管理。 相似文献
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简要介绍了国家重点科研项目档案归 所涉及的一些问题的处理和实际操作,指出了作为国家重点项目科技档案归档范围,方法以及应注意的事项。 相似文献
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根据实际情况确定了地震科学基金课题档案归档范围，就如何做好地震科学基金课题档案管理，从行政监督制约、档案人员的管理作用等方面进行探索，并通过实践取得了较好效果。 相似文献
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当前,信息系统在越来越多的单位和企业中得到了广泛的应用。如何能够方便快速地实现系统中历史数据的管理、更新和查询,是信息系统分析设计的主要问题。作者结合自己的工作经验,讨论了ArcGIS在历史数据的归档以及管理方面所提供的技术支持。 相似文献
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随着信息时代的到来，地震系统已实现了网上公文运转，传统的文件、档案管理办法已不能适应。本文以《中国地震局归档文件整理办法》在地球所的试点为例，论述了对归档文件的整理办法改革的必要性及存在的问题等。 相似文献
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《Ground Water Monitoring & Remediation》1989,9(4):149-158
Ground water professionals within public and private sectors use well records as data sources. Both the availability and the technical content of domestic well records in the 50 states are of interest to them. Well record availability is dependent on legal requirements, filing systems, databases, and storage places. Forty-six states have statewide regulations or other legal requirements for filing completion reports for domestic wells. Fifty-one agencies across the country maintain domestic well records. Filing systems involve location, chronology, date, or number information. Thirty-one of the 51 agencies maintain varying types of databases containing record information or data related to the records. Overall, records are kept in central offices in 43 states and in regional offices in three states.
The technical content of the records was evaluated for general, location, hydrogeology, and well construction information to assess the relative value of the records for use in national pesticide surveys. Technical information tabulated from the well records collected for this paper included nine items in a general category, 28 items in a well-construction category, eight items in a hydrogeology category, and six items in a location category. Items in the general and location categories identified the well location and ownership. Construction category items include those describing well-construction parameters such as grout, casing, and screen. Hydrogeology category items include static water level, aquifer media, and estimated yield. The three items always requested were owner's name, driller's name, and static water level. The three least-requested items, ranging from 16 percent to 10 percent, were packers, drilling fluid, and geologic formation. 相似文献
The technical content of the records was evaluated for general, location, hydrogeology, and well construction information to assess the relative value of the records for use in national pesticide surveys. Technical information tabulated from the well records collected for this paper included nine items in a general category, 28 items in a well-construction category, eight items in a hydrogeology category, and six items in a location category. Items in the general and location categories identified the well location and ownership. Construction category items include those describing well-construction parameters such as grout, casing, and screen. Hydrogeology category items include static water level, aquifer media, and estimated yield. The three items always requested were owner's name, driller's name, and static water level. The three least-requested items, ranging from 16 percent to 10 percent, were packers, drilling fluid, and geologic formation. 相似文献
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Quantitative imaging of complex structures from dense wide-aperture seismic data by multiscale traveltime and waveform inversions: a case study 总被引：3，自引：0，他引：3
S. Operto C. Ravaut L. Improta J. Virieux A. Herrero P. Dell'Aversana 《Geophysical Prospecting》2004,52(6):625-651
An integrated multiscale seismic imaging flow is applied to dense onshore wide‐aperture seismic data recorded in a complex geological setting (thrust belt). An initial P‐wave velocity macromodel is first developed by first‐arrival traveltime tomography. This model is used as an initial guess for subsequent full‐waveform tomography, which leads to greatly improved spatial resolution of the P‐wave velocity model. However, the application of full‐waveform tomography to the high‐frequency part of the source bandwidth is difficult, due to the non‐linearity of this kind of method. Moreover, it is computationally expensive at high frequencies since a finite‐difference method is used to model the wave propagation. Hence, full‐waveform tomography was complemented by asymptotic prestack depth migration to process the full‐source bandwidth and develop a sharp image of the short wavelengths. The final traveltime tomography model and two smoothed versions of the final full‐waveform tomography model were used as a macromodel for the prestack depth migration. In this study, wide‐aperture multifold seismic data are used. After specific preprocessing of the data, 16 frequency components ranging from 5.4 Hz to 20 Hz were inverted in cascade by the full‐waveform tomography algorithm. The full‐waveform tomography successfully imaged SW‐dipping structures previously identified as high‐resistivity bodies. The relevance of the full‐waveform tomography models is demonstrated locally by comparison with a coincident vertical seismic profiling (VSP) log available on the profile. The prestack depth‐migrated images, inferred from the traveltime, and the smoothed full‐waveform tomography macromodels are shown to be, on the whole, consistent with the final full‐waveform tomography model. A more detailed analysis, based on common‐image gather computations, and local comparison with the VSP log revealed that the most accurate migrated sections are those obtained from the full‐waveform tomography macromodels. A resolution analysis suggests that the asymptotic prestack depth migration successfully migrated the wide‐aperture components of the data, allowing medium wavelengths in addition to the short wavelengths of the structure to be imaged. The processing flow that we applied to dense wide‐aperture seismic data is shown to provide a promising approach, complementary to more classical seismic reflection data processing, to quantitative imaging of complex geological structures. 相似文献
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介绍了多道中心式记录强震仪的工作原理,性能及技术指标,给出了仪器的设计方法、理论分析和具体电气功能控制、时间服务系统等结构框图。文中还介绍了强震仪在地震现场观测获取的很有价值的地震记录。 相似文献
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František Hrouda 《Surveys in Geophysics》1982,5(1):37-82
Magnetic anisotropy in sedimentary rocks is controlled by the processes of deposition and compaction, in volcanic rocks by the lava flow and in metamorphic and plutonic rocks by ductile deformation and mimetic crystallization. In massive ore it is due to processes associated with emplacement and consolidation of an ore body as well as to ductile deformation. Hence, it can be used as a tool of structural analysis for almost all rock types. Morcover, it can influence considerably the orientation of the remanent magnetization vector as well as the configuration of a magnetic anomaly over a magnetized body. For these reasons it should be investigated in palaeomagnetism and applied geophysics as well. 相似文献