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61.
介绍了日本理学公司3080系列X射线荧光光谱仪出现的几种故障现象，。分析判断及处理方法等。 相似文献
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以Windods系列操作系统引起的网络故障为主线，对Windows的组网模型进行了简要的描述，同时以网络的软件故障分析为重点，较为系统地探讨了逐层剖析网络故障的方法，并把在网络故障诊断与排除中的一些实际经验介绍给读者。在案例中分析了由Windows98(第二版)引起的一个网络常见故障问题。 相似文献
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采用井下地震仪可监测到许多地面地震台未记录到的微弱地震波,可减小地面噪声干扰,大大提高震源定位精度。介绍了武汉甚宽频带数字地震监测1井的设计以及钻井和固井的关键技术。在项目实施过程中采用合理的钻井工艺和专门设计的单向注浆装置等技术满足了地震监测井的特殊技术要求。 相似文献
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M. A. Storms 《Marine Geophysical Researches》1990,12(1-2):109-130
The coring techniques and systems of the Ocean Drilling Program (ODP) were developed to satisfy a scientific need for better quality and improved recovery of oceanic core samples. Some of the ODP systems in use today evolved from refinements to earlier systems developed by the Deep Sea Drilling Project (DSDP) or were adaptions of available industry technology. Other systems were conceived and designed by DDP engineers. The evolution of these progressive scientific coring systems began with the Rotary Core Barrel (RCB) used by the DSDP and proceeded to the highly advanced Diamond Coring System (DCS) currently under development by ODP engineers. During the evolution several other key systems were developed. These included hydraulic piston coring, extended coring, pressure coring, bare rock spudding and several systems using high speed diamond coring technology. These include the positive displacement coring motor (PDCM), the Navi-drill core barrel, and a top driven diamond coring system (DCS). This article describes the evolution and conceptual design of these systems including the required bottom hole assemblies, and the sinker bar/sandline configurations.All data, text, figures, photo's etc. contained within this chapter are public domain and free from copywrite. All rights of ODP, NSF, JOI, or other private individuals to use any or all of this material in future published documents is reserved. 相似文献
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世纪锌铅银矿床由CRA公司于1990年发现,并进行勘探.钻探圈定出锌(10.3%)、铅(1.5%)、银(35×10-6)的矿石量达11600万t.矿床被发现以来,物探技术就应用于帮助确定矿化范围,不同岩性边界和构造的圈定,提供矿石储量的计算和采矿计划的资料以及该区下一步勘探工作帮助.使用的物探方法有重力、地面和航空磁法、地面和航空电磁、IP/电阻率法、钻孔物探测井及地震反射.最为有效的方法是IP/电阻率法.它可以帮助确定在深度至少为150m的石灰岩和年轻盖层下的矿化范围 相似文献
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Recordings from downhole accelerometer arrays offer unique insight into soil behavior and ground response during earthquakes. In this paper we present a scheme for interpolating displacement and acceleration measurements to provide approximations for subsurface shear strain and stress as continuous functions of time. Our suggested interpolating functions are constructed in such a way that the free surface boundary condition will always be satisfied and the interpolated displacement and acceleration remain finite for all depths. We also show how the functions can be adapted to represent layered soil profiles. Depending on the number of instruments in the downhole array, a truncated series of functions can be derived so that each represents a modal shape for the layered soil profile. The resulting approximations for strain and stress are considered more accurate and robust than previous approximations. © 1998 John Wiley & Sons, Ltd. 相似文献