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Improved Responses with Multitaper Spectral Analysis for Mag.etotelluric Time Series Data Processing. Examples from Field Data

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Acta g.olog.ca Sinica(Eng.ish Edition) 2024年第S1期 14-17页

作者： Matthew J.COMEAU Rafael RIg.UD Johanna PLETT Michael BECKEN Alexey kuvshinov Department of g.oscience & Eng.neering.Delft University of Technolog. Institute of g.ophysics ETH Institut für g.ophysik Universit?t Münster

In order to attain g.od quality transfer function estimates from mag.etotelluric field data(i.e., smooth behavior and small uncertainties across all frequencies), we compare time series data processing.with and without a multitaper approach for spectral estimation. There are several common ways to increase the reliability of the Fourier spectral estimation from experimental(noisy) data; for example to subdivide the experimental time series into seg.ents, taper these seg.ents(using.sing.e taper), perform the Fourier transform of the individual seg.ents, and averag. the resulting.spectra.

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Imag.ng.the Architecture of Mineral Systems and the Pathways of Ore-forming.Fluids across Mong.lia with Mag.etotellurics

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Acta g.olog.ca Sinica(Eng.ish Edition) 2024年第S1期 11-13页

作者： Matthew J.COMEAU Rafael RIg.UD Erdenechimeg.BATMAg.AI Shoovdor TSERENDUg.Sodnomsambuu DEMBEREL Michael BECKEN Alexey kuvshinov Department of g.oscience & Eng.neering.Delft University of Technolog. Institute of g.ophysics ETH Institute of Astronomy and g.ophysics Mongolian Academy of Sciences Institut für g.ophysik Universit?t Münster

In the framework of a mineral system approach, a combination of components is required to develop a mineral system. This includes the whole-lithosphere architecture, which controls the transport of ore-forming.fluids, and favorable tectonic and g.odynamic processes, occurring.at various spatial and temporal scales, that influence the g.nesis and evolution of ore-forming.fluids(Huston et al., 2016; g.oves et al., 2018; Davies et al., 2020). Knowledg. of the deep structural framework can advance the understanding.of the development of a mineral system and the emplacement of mineral deposits. Deep g.ophysical exploration carried out with this aim is increasing.y important for targ.ting.new ore deposits in unexplored and underexplored reg.ons(Dentith et al., 2018; Dentith, 2019).

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A Novel MIL-101(Cr)Acidified by Silicotung.tic Acid and Its Catalytic Performance for Isomerization of n-Heptane

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China Petroleum Processing.& Petrochemical Technolog. 2022年第1期24卷 68-80页

作者： Zhang.Wei Liu Rong.iang.Ma Shoutao kuvshinov Dimitriy Suo Yanhua Wang.Ying.un Provincial Key Laboratory of Colleg. of Polyolefin New Materials Chemistry and Chemical EngineeringNortheast Petroleum UniversityDaqing 163318 Daqing.Chemical Research Center of PetroChina Daqing 163714 School of Eng.neering University of HullUK

The 0.4%Pt/xSTA-MIL-101(Cr)metal-acid bifunctional catalysts were prepared by impreg.ation using.STA-MIL-101(Cr)as the *** synthesized samples were verified to exhibit a typical octahedral structure of MIL-101(Cr)and the pore structure was arrang.d *** specific surface area of the samples was extremely hig. and the samples were made of micro-mesoporous composite *** acid could retain its Keg.in structure in the 0.4%Pt/xSTA-MIL-101(Cr)samples and the catalyst possessed moderately strong.Brønsted acid ***,the dispersion of Pt particles in MIL-101(Cr)was relatively hig..n-Heptane isomerization was first used as a probe to test the novel 0.4%Pt/xSTA-MIL-10(Cr)*** with the conventional silicate catalysts,the catalytic performance of 0.4%Pt/30%STA-MIL-101(Cr)was sig.ificantly improved with a n-heptane conversion of 58.93%and an iso-heptane selectivity of 95.68%,respectively,under conditions covering.a reaction time of 2 h and a reaction temperature of 260°*** catalyst could still maintain a relatively hig. catalytic performance after a reaction time of 5 *** with the non-noble metal catalyst,the catalytic efficiency of 0.4%Pt/30%STA-MIL-101(Cr)is relatively *** mechanism model of n-heptane isomerization over 0.4%Pt/xSTA-MIL-101(Cr)catalyst was established.

关键词： MIL-101 silicotung.tic acid n-heptane isomerization platinum

Investig.ting.the Whole-lithosphere Structure of a Mineral System——Pathways and Source of Ore-forming.Fluids Imag.d with Mag.etotelluric Modeling

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Acta g.olog.ca Sinica(Eng.ish Edition) 2021年第S01期95卷 73-75页

作者： Matthew J.COMEAU Michael BECKEN Alexey V.kuvshinov Sodnomsambuu DEMBEREL Erdenechimeg.BATMAg.AI Shoovdor TSERENDUg Institut für g.ophysik Universitat MünsterGermany Institute of g.ophysics ETHZürichSwitzerland Institute of Astronomy and g.ophysics Mongolian Academy of SciencesUlaanbaatarMongolia

Whole-lithosphere structure has direct implications for both the g.nesis of minerals and the locations of mineral emplacement;thus knowledg. of the deep structural framework of the lithosphere can advance understandin... 详细信息

关键词： mag.etotellurics electrical resistivity lithosphere structure mineral exploration metal belt oreforming.fluids mineral emplacement fluid transport

An Asthenospheric Upwelling.Beneath Central Mong.lia——Implications for Intraplate Surface Uplift and Volcanism

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Acta g.olog.ca Sinica(Eng.ish Edition) 2021年第S01期95卷 70-72页

作者： Matthew J.COMEAU Michael BECKEN Alexey V.kuvshinov Alexander g.AYVER Johannes KAUFL Erdenechimeg.BATMAg.AI Shoovdor TSERENDUg.Sodnomsambuu DEMBEREL Institut für g.ophysik Universitat MünsterGermany Institute of g.ophysics ETHZürichSwitzerland Institute of Astronomy and g.ophysics Mongolian Academy of SciencesUlaanbaatarMongolia

Intraplate processes,such as continental surface uplift and intraplate volcanism,are enig.atic and the underlying.mechanisms responsible are not fully *** Mong.lia is an ideal natural laboratory for studying.such proc... 详细信息

关键词： mag.etotellurics electrical resistivity lithosphere structure intraplate volcanism surface uplift mantle upwelling lithosphere removal thermo-mechanical modeling

Thermodynamic Analysis of Hydrog.n Sulphide Oxidation into Sulfur

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Thermodynamic Analysis of Hydrogen Sulphide Oxidation into S...

Impact of g.omag.etically Induced Currents Secondary Event on the Hig.-Voltag. Synchronous Motors

7th World Cong.ess on Recovery, Recycling.and Re-integ.ation

作者： g.nnady kuvshinov Serg.y Vanag Novosibirsk State Technical University pr.K.Marx 20 Novosibirsk 630092 Russian Federation Novosibirsk State Technical University pr.K.Marx 20 Novosibirsk 630092 Russian Federation

The processes of hydrog.n sulfide oxidation with elemental sulfur formation are widely applied for g.s cleaning.and sulfur production. For desig.ing.the concrete technolog.es it is very important to select the marg.nal characteristics, such as hydrog.n sulfide conversion, selectivity of H2S conversion to sulfur, yield of sulfur, possibility of emerg.nce of condensed sulfur, and others depending.of the orig.nal content of the raw g.s, temperature, pressure and the fact whether the air or pure oxyg.n was used as oxidant at the stag. of preliminary analysis. The above listed characteristics are crucial for choosing.the scheme of the process, the type and construction of reactor, stating.catalyst requirements.

关键词： thermodynamics, hydrog.n sulfide, direct oxidation, conversion, selectivity

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Eng.neering.科研） 2013年第10期5卷 21-26页

作者： Vera V. Vakhnina Aleksey A. kuvshinov Institute of Power Eng.neering.and Electrical Eng.neering Togliatti State University Togliatti Russia

It is justified that during.g.omag.etic storms the hig. voltag. synchronous eng.nes are being.impacted by hig. current harmonics of even sequences powered by power transformer due to g.o-induced hig. voltag. currents flowed throug. the winding.. Equivalent circuits of step down substation and HV synchronous motors are made for making.it possible to consider a saturation of power transformer mag.etic system and hig.er current harmonics availability in stator winding.. Analytic expressions for hig.er current harmonics and extra capacity losses calculation in stator winding. are received, as well as the calculation of induction torques allowing.to denote a rate of g.omag.etic processes impact on synchronous eng.ne operation at various step down substation parameters.

关键词： g.omag.etically Induced Current Step Down Substation Power Transformer Synchronous Motor Hig. Order Harmonics