油水层快速识别改进的CP网络方法初探

CP网络具有分类快速、准确等优点。文中详细介绍了CP网络的算法,并对其进行了部分改进,增加了误差检验和网络测试功能;使用VisualBasic6.0开发了相应仿真软件,并将其用于某油田的油、水层快速识别。实际应用表明:改进的CP网络训练周期短、识别准确率高,完全可以用于油、水层等的快速识别,具有广阔的应用前景。     

中国新一代高精度、高分辨率大地水准面的研究和实施

采用移去恢复技术，利用我国高分辨率DTM和重力资料推算我国大陆重力大地水准面;然后再和我国GPS水准所构成的高程异常控制网拟合,推算了具有dm级精度、15′×15′分辨率的我国大陆大地水准面。利用全国地壳运动监测网络的80余个高精度GPS水准点进行外部检核，检核结果证实和原设计精度完全一致，即该大陆大地水准面的绝对精度,在东经102°以东高于±0.3m，在东经102°以西、北纬36°以北为±0.4m，36°以南为±(0.4～0.6)m。利用卫星测高数据计算垂线偏差，反解我国海域大地水准面。为了检核，由测高垂线偏差反演为重力异常，与海上万余点船测重力值进行了外部检核；同时用上述反演的重力异常推算大地水准面，与直接解得的相应结果进行比较作为内部检核。由重力和GPS水准数据推算的上述大陆大地水准面，和主要由卫星测高数据确定的海洋大地水准面，二者之间一般都存在以系统误差为主的拼接差。顾及这一现象并结合我国在陆海大地水准面拼接区重力资料稀疏的实际，研究提出了扩展拼接技术，即在沿海选取部分陆海毗邻的局部地区，在这局部地区内，陆地用实测平均重力格网数据，海洋用测高平均重力格网数据，统一推算这陆海局部重力大地水准面。然后利用这一局部大地水准面的陆地部分和已经用GPS水准校正的陆地大地水准面进行拟合。最后用拟合参数校正中国全部海域的测高重力大地水准面，从而保持陆地部分大地水准面不变，最大限度地削弱拼接点和测高海洋大地水准面的系统误差。     

计算机图像处理可视化软件设计与实现

对数字图像实施处理的可视化表达，将使复杂，深奥的图像处理原理更容易理解，文中在详细分析数字图像处理有关理论，算法的基础上，设计了软件的总体框架，实现了多种图像处理功能，并辅以强大的联机帮助。     

EDMI最高可能达到的精度 (测距精度)的检测

规范明确规定对投入使用的光电测距仪必须对其进行检测,只有这样才能保证测距成果的可靠性.本文主要通过检测测距仪各项误差,得出测距仪最高可能达到的测距精度,使操作者在使用此测距仪的过程中明白对各项误差应采取怎样的措施,充分发挥测距仪的精度潜力.     

山西临汾区域数字地震台的建设

介绍了临汾区域数字地震台的技术系统建设过程、技术构成及成果应用，并将其与同台基模拟观测系统进行了分析对比，结果表明其监测地震的能力以及处理地震的速度明显优于模拟观测系统，山西临汾区域数字地城台的建成将大大提高山西南部对震的快速响应能力。     

南海天然气水合物地震资料处理及其特征

以中国首次在南海北部某海区采集的以探测天然气水合物为目的的超过500km的多道高分辨率地震调查数据为基础，利用真振幅处理，子波处理，速度分析，叠前偏移处理以及地震属性道处理等多种针对天然气水合物的先进处理技术和方法，有效地寻找天然气水合物的存在标地，如似海底反射（BSR），振幅空白，极性反转，异常速度等，证实南海北部存在天然气水合物，并具有独特的地震反射特征。     

基于Web平台的岩石矿物数据处理软件新进展

基于Web(WordwideWeb万维网 )平台的岩石矿物数据处理软件是按照浏览器 服务器的模式工作 ,即用户以客户端浏览器为计算平台 ,而计算的应用程序及数据库在服务器端运行。本文介绍了当前岩石矿物数据处理软件的发展现状和趋势及成功开发基于Web平台的岩石数据处理程序的范例 ,探讨了开发基于Web平台的岩石矿物数据处理软件的实现方法及优越性 ,从而论证了建立基于Web平台的岩石矿物数据处理软件的必要性和可行性     

宝泉滑坡工程处理的数值模拟

宝泉滑坡体方量巨大 ,且处于宝泉抽水蓄能电站工程的关键部位。通过极限平衡法和三维有限元模拟计算 ,模拟了宝泉滑坡体的稳定性和工程处理方案。削坡减载是工程处理的最有效措施。将滑坡体开挖至 770m高程后 ,滑坡体稳定性将大大提高 ,即使在Ⅶ度地震条件下仍将保持稳定。     

A note on the useable dynamic range of accelerographs recording translation

Since the late 1970s, the dynamic range and resolution of strong motion digital recorders have leaped from 65 to 135 dB, opening new possibilities for advanced data processing and interpretation. One of these new possibilities is the calculation of permanent displacement of the ground or of structures, associated with faulting or with non-linear response. Proposals on how permanent displacements could be recovered from recorded strong motion have been published since 1976. The analysis in this paper concludes that permanent displacements of the ground and of structures in the near-field can be calculated provided all six components of strong motion (three translations and three rotations) have been recorded, and the records are corrected for transducer rotation, misalignment and cross-axis sensitivity.     

Evolution of accelerographs, data processing, strong motion arrays and amplitude and spatial resolution in recording strong earthquake motion

This paper presents a review of the advances in strong motion recording since the early 1930s, based mostly on the experiences in the United States. A particular emphasis is placed on the amplitude and spatial resolution of recording, which both must be ‘adequate’ to capture the nature of strong earthquake ground motion and response of structures. The first strong motion accelerographs had optical recording system, dynamic range of about 50 dB and useful life longer than 30 years. Digital strong motion accelerographs started to become available in the late 1970s. Their dynamic range has been increasing progressively, and at present is about 135 dB. Most models have had useful life shorter than 5–10 years. One benefit from a high dynamic range is early trigger and anticipated ability to compute permanent displacements. Another benefit is higher sensitivity and hence a possibility to record smaller amplitude motions (aftershocks, smaller local earthquakes and distant large earthquakes), which would augment significantly the strong motion databases. The present trend of upgrading existing and adding new stations with high dynamic range accelerographs has lead to deployment of relatively small number of new stations (the new high dynamic range digital instruments are 2–3 times more expensive than the old analog instruments or new digital instruments with dynamic range of 60 dB or less). Consequently, the spatial resolution of recording, both of ground motion and structural response, has increased only slowly during the past 20 years, by at most a factor of two. A major (and necessary) future increase in the spatial resolution of recording will require orders of magnitude larger funding, for purchase of new instruments, their maintenance, and for data retrieval, processing, management and dissemination. This will become possible only with an order of magnitude cheaper and ‘maintenance-free’ strong motion accelerographs. In view of the rapid growth of computer technology this does not seem to be (and should not be) out of our reach.