搜索结果: 31-45 共查到“理学 MT”相关记录80条 . 查询时间(0.187 秒)
Rheological control on the dynamics of explosive activity in the 2000 summit eruption of Mt. Etna
Rheological control the dynamics of explosive activity the 2000 summit eruption Mt. Etna
2014/12/31
In the period from January to June 2000 Mt. Etna exhibited an exceptional explosive activity characterized by a succession of 64 Strombolian and fire-fountaining episodes from the summit South-East Cr...
基于自适应差分进化算法的MT信号激电信息提取
自适应差分进化算法 大地电磁测深 非线性反演 激电信息提取
2016/6/1
从MT信号中提取激电信息的研究有助于提高大深度探测技术的勘探精度、深度和范围。针对MT信号激电信息提取中存在的非线性和非凸特征,通过改进混沌自适应差分进化算法中进化参数的自适应策略,提出了一种基于非均匀统计分布的自适应差分进化两阶段最小构造反演方法。一方面该方法利用柯西分布和高斯分布的统计特性自适应获取进化参数F和CR,提高算法的全局搜索能力, 通过记忆以往迭代过程中的优秀进化参数提高算法后期的稳...
Conservation Governance and Management of Sagarmatha (Mt. Everest) National Park, Buffer Zone, and Buffer Zone Community Forest User Groups in Pharak, Nepal
Devolution Sagarmatha National Park Sherpas Political ecology governance protected areas rights-based conservation indigenous peoples' rights
2014/10/22
The aim of this dissertation is to assess the political ecology of conservation governance and management of Sagarmatha (Mount Everest) National Park (SNP), SNP Buffer Zone (BZ) and the Buffer Zone Co...
Volcanic SO2 by UV-TIR satellite retrievals:validation by using ground-based network at Mt. Etna
Volcanic SO2 UV-TIR satellite retrievals:validation ground-based network Mt. Etna
2015/8/18
Mt. Etna volcano in Italy is one of the most active degassing volcanoes worldwide, emitting a mean of 1.7 Mt/year of Sulphur Dioxide (SO2) in quiescent periods. In this work, SO2 measurements retrieve...
Detection of Volcanic Plumes by GPS: the 23 November 2013 Episode on Mt. Etna
GPS SNR data Etna volcanic plume
2015/8/18
The detection of volcanic plumes produced during explosive eruptions is important to improve our understanding on dispersal processes and reduce risks to aviation operations. The ability of Global Pos...
Origin of the gases released from the Acqua Passante and Ermeta wells (Mt. Amiata, central Italy) and possible environmental implications for their closure
Central Italy Amiata volcano Hydrothermal gases CO_2 Environmental impact
2015/8/18
The Mt. Amiata volcano (Tuscany, central Italy) hosts the second largest geothermal field of Italy. Its SW and NE sectors are characterized by the presence of several CO2-rich (>95% by vol.) gas disch...
凡纳滨对虾MT基因序列及其在卵巢发育和低温胁迫中的表达分析
凡纳滨对虾 金属硫蛋白 低温 卵巢
2013/10/19
在低温处理仔虾全长cDNA文库的筛选测序中,获得凡纳滨对虾(Litopenaeus vannmei)金属硫蛋白基因全长cDNA序列,该序列含有425个碱基,包含177bp开放阅读框,上游98bp的非编码区及下游150bp的非编码区,编码58个氨基酸,其中半胱氨酸含量丰富, 富含金属硫蛋白典型的Cys-X(1-3)-Cys结构。多序列比对表明,凡纳滨对虾MT蛋白序列与美洲螯龙虾(Homarus am...
基于经验模态分解与小波阈值的MT信号去噪方法
经验模态分解 小波阈值滤波 大地电磁 去噪
2013/11/13
针对低信噪比大地电磁数据的去噪问题，本文提出了一种基于经验模态分解的小波阈值去噪方法，并给出了方法原理和计算步骤；在与小波变换去噪效果对比的基础上，用仿真实验验证了方法的可靠性，并对安徽和内蒙某地实测数据进行了去噪处理。结果表明，本文提出的去噪方法是有效的，去噪后ＭＴ 信号变得平稳，估算的响应曲线误差棒平均值减小，可为进一步的资料处理和地质解释提供保障。
Historical changes in soil acidification inferred from the dendrochemistry of a Tateyama cedar at Bijodaira, Mt. Tateyama, Japan
tree ring soil acidification dendrochemistry Bijodaira Mt. Tateyama
2017/4/11
Increased emission of acidic pollutants on the Asian continent and long-distance transport of such pollutants have
caused soil acidification in eastern Asia. In Japan, Hokuriku district experiences h...
MT-重力模拟退火联合反演研究
联合反演 模拟退火 MT 重力
2013/11/5
为了合理互补不同地球物理场的优势和特点,本文研究了MT与重力模拟退火联合反演的技术.在分析MT与重力联合反演的必要性和可行性后,讨论并研究了主要技术难点及解决方法.重点解决了模型扰动、MT与重力界面不一致的处理、目标函数的加权联合问题,提出MT-重力模拟退火反演(MT-GSA)算法.在此基础上进行了理论模型试验和实际资料处理,取得了较好的效果.
电性参数分块连续变化二维MT有限元数值模拟
大地电磁法 起伏地形 三角单元网格 电性参数分块连续变化 有限元
2013/11/6
为了易于模拟野外复杂地形和地下任意形状地电体模型,将有限元单元网格设计为三角单元;并考虑到野外实际勘探中,地球介质的电性参数均是连续变化的情况,单元内的场值和电性参数被设计为双线性变化;推导出二维起伏地形条件下大地电磁法有限元数值模拟算法;根据单元节点主场值和线性插值形函数间的关系,计算出单元节点的辅助场值;在二维起伏地形情况下,定义TE、TM模式视电阻率和阻抗相位.4个模型的计算的结果与解析法的...
TheICT ’s Patent MT System Description for NTCIR-9
TheICT ’s Patent MT System Description NTCIR-9
2013/4/22
This paperintro duces the ICT’ssy stem for Patent Ma-ch in eTran slation at the NTCI R - 9 Work shop.Inth is year’s program,we particip at eall the three subt asks:Chinese-English,English-Japanese an ...
Study on Characteristics of Quercus aliena var. acuteserrata Community in Mt. Qinling
Quercus aliena var. Acuteserrata Leaf-Form Life Form Mt. Qinling
2011/12/16
In Quercus aliena var. Acuteserrata community, phanerophytes (Ph) accounting for 58.7% was main Life form. Hemicryptophytes (H) with 28.1% was the second in Qinling Mountains. Mesophyll which accounte...
The present status of the GAMMA facility consisting of an enlarged surface EAS array (116 of 1 m^2 scintillation detectors) and underground muon carpet (150 m^2 detectors) is described. The recent re...