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Modeling of 3-D terrain effect on mt field using BEM

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Chinese Science Bulletin 1997年第9期42卷 764-767页

作者： XU Shizhe, RUAN Baiyao, ZHOU Hui and CHEN Leshou1.Institute of Geology and Geophysics, Ocean University of Qingdao, Qingdao 266003, China 2. China University of Geosciences, Beijing 100083, China Institute of Geology and Geophysics Ocean University of Qingdao Qingdao 266003 China|

THE modeling of 2-D terrain effect on magnetotelluric(mt)has been solved using finite ele-ment method(FEM)and boundary element method(BEM).This note uses BEM tosolve the *** solution of H_x- and E_x-polarization wave ... 详细信息

关键词： mt 3-D terrain boundary element method.

ELISA of polyclonal antibody to fish mt and study on heavy metal tolerance in fish

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Journal of Environmental Sciences 1995年第4期7卷 407-413页

作者： Wang, Yingyan

ＥＬＩＳＡｏｆｐｏｌｙｃｌｏｎａｌａｎｔｉｂｏｄｙｔｏｆｉｓｈＭＴａｎｄｓｔｕｄｙｏｎｈｅａｖｙｍｅｔａｌｔｏｌｅｒａｎｃｅｉｎｆｉｓｈＷａｎｇＹｉｎｇｙａｎ（ＮａｔｉｏｎＥｎｇｉｎｅｅｒｉｎｇＲｅｓｅａｒｃｈＣｅｎ... 详细信息

ＥＬＩＳＡｏｆｐｏｌｙｃｌｏｎａｌａｎｔｉｂｏｄｙｔｏｆｉｓｈＭＴａｎｄｓｔｕｄｙｏｎｈｅａｖｙｍｅｔａｌｔｏｌｅｒａｎｃｅｉｎｆｉｓｈＷａｎｇＹｉｎｇｙａｎ（ＮａｔｉｏｎＥｎｇｉｎｅｅｒｉｎｇＲｅｓｅａｒｃｈＣｅｎｔｅｒｆｏｒＵｒｂａｎＥｎｖｉｒｏ...

关键词： ELISA of polyclonal antibody to fish mt and study on heavy metal tolerance in fish mt

Numerical modeling of 3-D terrain effect on mt field

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Science China Earth Sciences 1997年第3期40卷 269-275页

作者：徐世浙阮百尧周辉陈乐寿徐师文 Institute of Geology and Geophysics Ocean University of Qingdao Qingdao 266003 China Geological University of China Beijing 100083 China The 6th Geophysical Prospecting Team of Ministry of Geology and Mineral Resources Nanjing 200031 China

Using the boundary element method, the numerical modeling problem of three-dimensional terrain effect on magnetotelluric (mt) field is solved. This modeling technique can be run on PC in the case of adopting special net division. The result of modeling test for 2-D terrain by this modeling technique is basically coincident with that by 2-D modeling technique, but there is a great difference between the results of 3-D and 2-D modeling for 3-D terrain.

关键词： mt 3-D terrain numerical modeling boundary element method

Biomarkers in the Molar Tooth (mt)Bearing Limestones in the Jilin-Liaoning Area of China

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Chinese Journal Of Geochemistry 2004年第4期23卷 334-341页

作者：旷红伟李艳霞曾艳涛孟祥化葛铭 School of Geophysics and Petroleum Resources of Yangtze University School of Resource and Information of the University of Petroleum Institute of Sedimentary Basin of China University of Geosciences

The origin of Molar Tooth(mt)carbonates has been argued for more than 100 years, which are a kind of Proterozoic carbonates especially composed of microsparite with ptygmatically folded and sheet-like structures. Biomarkers detected in the microcalcsparite from the Wanlong and Xingmincun formations in the Jilin-Liaoning area showed there are abundant normal alkanes, isoprenoids, hopanes, steranes, alkylmethylcyclohexanes, and alkylcyclohexanes, indicating a diversity of biological source: long-chain isoprenoids, the major components of chlorophyll, such as C 19, C 20, a kind of major biomarkers synthesized early by isoprenoid monomers; hopanes a type of characteristic biomarkers from prokaryote, such as archaebacteria and cyanobacteria; sterane a biomarker for eukaryote; and two kinds of alkanes with C 17, C 18 as the main peaks representing aquatic bacteria and with C 23, C 24 as the main peaks representing fungi, respectively. Biomarker analysis showed that mt is the result of bacterial and algal activities, which is a kind of organisms between aerobic and anaerobic bacteria, reproducing well in normal or slightly saline sea water under weak oxidation-reduction conditions, resulting in rapid deposition of calcite as microsparite due to some mechanisms.

关键词： mt 碳酸盐有机物吉林-辽林地区地球化学矿床沉降

Population recovery of the critically endangered western black crested gibbon(Nomascus concolor) in mt. Wuliang, Yunnan, China

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Zoological Research 2022年第2期43卷 180-183页

作者： Peng-Fei Fan Lu Zhang Li Yang Xia Huang Kai-Chong Shi Guo-Qing Liu Chun-Hua Wang School of Life Sciences Sun Yat-Sen UniversityGuangzhouGuangdong 510275China Jingdong Management Bureau of Wuliangshan National Nature Reserve JingdongYunnan 676200China

We conducted the third population survey of western black crested gibbons(Nomascus concolor)in ***,Yunnan Province,China,from November 2020 to March 2021 following the first and second surveys conducted in 2001 and201... 详细信息

关键词： crest black mt

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mt-重力模拟退火联合反演研究

地球物理学报 2012年第2期55卷 663-670页

作者：陈华根李嘉虓吴健生于鹏同济大学海洋地质国家重点实验室上海200092

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... 详细信息

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.

关键词：联合反演模拟退火 mt 重力

基于VTI介质海洋CSEM和mt数据联合反演的黄海海相残留盆地深部结构研究

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地球物理学报 2024年第5期67卷 1853-1865页

作者：罗鸣裴建新段双敏吴志强中国海洋大学海洋地球科学学院海底科学与探测技术教育部重点实验室青岛266100 中国地质调查局青岛海洋地质研究所青岛266237 崂山实验室海洋矿产资源评价与探测技术功能实验室青岛266100

黄海海相残留盆地因其地层结构和深部地质构造的复杂性,一直是我国海洋地球科学的一项研究重点,虽然针对该研究区已开展了一系列的地球物理调查,但由于高速碳酸盐岩层对地震波存在着一定的屏蔽作用,致使该海域深部地震资料品质受到较大... 详细信息

黄海海相残留盆地因其地层结构和深部地质构造的复杂性,一直是我国海洋地球科学的一项研究重点,虽然针对该研究区已开展了一系列的地球物理调查,但由于高速碳酸盐岩层对地震波存在着一定的屏蔽作用,致使该海域深部地震资料品质受到较大影响.海洋电磁法不受高速屏蔽层影响,有利于获得高速屏蔽层内部及其下方的深部结构信息.海洋可控源电磁法(Controlled source electromagnetic method,CSEM)和海洋大地电磁测深(Magnetotelleric,mt)能够提供海底电性结构的互补信息,较于单一的电磁方法,二者联合可获得更为准确的海底电性分布.本文提出了基于乘积目标函数的层状垂直各向异性(Vertical anisotropic,VTI)介质海洋可控源电磁和大地电磁资料联合反演方法,该方法在迭代过程中根据数据的拟合情况自适应调整CSEM和mt数据的权重和正则化因子的权重,反演参数包括海底介质的横向电阻率、垂向电阻率和地层厚度.以南黄海地质地球物理资料为例,建立浅水环境地电模型,并结合浅水环境的高噪声背景特点进行合成数据模型测试及分析.将本文所提出算法应用于理论模型合成数据和南黄海实测资料反演,结果表明,较于单独的海洋CSEM和mt反演,联合反演方法能够较准确地重构海底地层的电性分布,提高对海底地层各向异性电阻率的分辨能力.

关键词：电阻率各向异性联合反演 CSEM mt 南黄海

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mt烟火药高压稳态燃烧射流场的数值模拟

工程热物理学报 2018年第1期39卷 224-231页

作者：马龙泽余永刚南京理工大学能源与动力工程学院南京210094

为研究镁-特氟隆(mt)基烟火药在不同工况下的燃烧过程,建立了mt烟火药柱二维稳态燃烧流动模型,气相反应采用简化的三步反应动力学机理,利用CFD软件Fluent,数值分析了mt稳定燃烧时的射流形态及流场参数分布特性。结果表明:燃烧流场温度... 详细信息

为研究镁-特氟隆(mt)基烟火药在不同工况下的燃烧过程,建立了mt烟火药柱二维稳态燃烧流动模型,气相反应采用简化的三步反应动力学机理,利用CFD软件Fluent,数值分析了mt稳定燃烧时的射流形态及流场参数分布特性。结果表明:燃烧流场温度在燃面上方50 mm内处于急剧上升阶段,也是气相反应区域;镁的质量分数为0.45~0.61时,其含量越小,温度越高,且越靠近火焰核心,温度梯度越大;压力为0.1~5 MPa时,随着压力升高,火焰核心向下游移动,动力学反应速率明显增大,CF_2组分分布核心和Mg的氧化还原反应核心向下游移动,而C组分分布核心和C-C结合反应核心由一个中心区逐步分裂移至两侧,形成两个小的核心区。

关键词： mt 烟火药燃烧射流场数值模拟

Identification and Correction for mt Static Shift Using TEM Inversion Technique

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Journal of China University of Geosciences 2001年第3期12卷 266-271页

作者： Yang ChangfuDepartment of Earth Science, Nanjing University, Nanjing 210093Lin ChangyouLanzhou Institute of Seismology, China Seismological Bureau, Lanzhou 730000 Department of Earth Science Nanjing University Nanjing 210093 Lanzhou Institute of Seismology China Seismological Bureau Lanzhou 730000

The inversion of TEM data, using the observed magnetic fields instead of that of apparent resistivities data in this paper, avoids the errors caused by the definition of the apparent resistivity. The inversed results by fitting the magnetic fields of the transmitter source's image with the observed magnetic fields are relatively less affected by the conductivity inhomogeneity. The mt apparent curve is calculated on the basis of the conductivity model constructed from the TEM inversion results. This curve is used as a reference curve for the correction of mt static shift, which makes the correction more reliable. Meanwhile, the domain transformation is also achieved from time to frequency between the two kinds of electromagnetic data. Therefore, the correction of the mt static shift is actualized using TEM inversion method. The corresponding application research shows that this method is very effective for the identification and correction of the mt static shift.

关键词： TEM inversion mt correction of static shift.