Body waveform inversion for the source process of the February 3,1996 Lijiang,Yunnan earthquake

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山西应县木塔与历史地震

山西应县木塔与历史地震的关系是制定修缮应县木塔方案中的一个重要的问题。通过对历史资料的详细研究，对应县木塔的建造时间、场地影响烈度、地震对木塔的影响以及历史上2次加固的情况有了更清晰的认识。在此基础上，对未来的地震烈度给出了最保守的估计，并结合木塔的场地条件和木塔的结构，提出了对应县木塔抗震加固的具体建议。     

极点和零点—数字地震学基础（英文，续3）

(上接本刊 2 0 0 1年第 2期第 47页 )7　从无限连续到有限离散前面已经讨论了有关连续时间 L TI系统的一些概念。然而 ,在用计算机软件实际进行处理时使用的是离散的数字序列。必须清楚离散系统和连续系统之间的一些重要差别。7.1　连续周期信号的傅里叶级数首先从傅里叶分析的     

山西应县木塔修缮中的问题及对策

对目前山西应县木塔修缮中存在的一些认识问题进行了讨论。论证了纳米复合纤维技术用于修缮应县木塔的目标、做法、效果和优势 ,指出用纳米复合纤维技术修缮山西应县木塔是可行的。     

覆盖层厚度对反应谱峰值的影响

在研究多个工程场地钻孔资料的基础上,选取和构造了若干典型场地剖面,利用目前工程上广泛应用的场地地震反应分析的一维等效线性化波动方法,计算了各剖面在不同基底地震动输入的反应谱值及地表加速度峰值,分析了覆盖层厚度对反应谱峰值及峰值周期、地表加速度峰值和放大倍数的影响,得出了一些有意义的结论。     

Overlap between Atlantic bluefin tuna spawning grounds and observed Deepwater Horizon surface oil in the northern Gulf of Mexico

The 2010 Deepwater Horizon oil spill impacted the northern Gulf of Mexico (GOM) during the spring spawning season of Atlantic bluefin tuna (BFT). Overlap between BFT spawning habitat and surface oil in the northern GOM was examined using satellite-derived estimates of oil coverage, and spawning habitat models. Results suggested that although eggs and larvae were likely impacted by oil-contaminated waters in the eastern GOM, high abundances of larvae were located elsewhere, especially in the western GOM. Overall, less than 10% of BFT spawning habitat was predicted to have been covered by surface oil, and less than 12% of larval BFT were predicted to have been located within contaminated waters in the northern GOM, on a weekly basis. Our results provide preliminary but important initial estimates of the effects of the spill on larval BFT mortality, as concern continues over the appropriate management responses to impacts of the spill.     

强震动观测和应用及山西数字强震动台网

对强震动观测的意义,强震仪的发展历史,强震动观测与通常地震观测(测震)的区别,国内外强震动观测的现状以及强震动观测的应用情况进行了论述.此外,对"十五"期间建成的山西数字强震动台网进行了简要介绍.