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Journal of Quantum Information Science 2022年第4期12卷 111-124页

作者： Ronald Columbié-Leyva Alberto López-Vivas[1† ] Ulises Miranda ilya g. kaplan Instituto de Investig.ción en Materiales UNAM CDMX México Baltic Scientific Instruments Riga Latvia

The discovered in 2008 Fe-based superconductors (SC) are a paramag.etic semimetal at ambient temperature and in some cases they become superconductor upon doping. In spite of so many years since its discovery it is still not known the mechanism that leads to superconductivity. The electronic structure study is used for determining.key features of the SC mechanism in these materials. The calculations were performed using.the modern suite of prog.ams MOLPRO 2021. We performed quantum calculations of a cluster embedded in a backg.ound charg. distribution that represents the infinite crystal. The Natural Population Analysis was used for determining.the charg. and spin distribution in the studied materials. As follows from our results, the possible mechanism for superconductivity corresponds to the RVB theory proposed by Anderson for hig. Tc superconductivity in cuprates.

关键词： Iron-Based Hig.-Tc Superconductors Superconductivity Embeded Cluster Method Natural Bonding.Orbitals Analysis

Quantum Mechanical Calculations of Hig.-T<sub&g.;c</sub&g.;Fe-Superconductors

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Journal of Quantum Information Science 2021年第2期11卷 84-98页

作者： Ronald Columbié-Leyva Ulises Miranda Alberto López-Vivas Jacques Soullard ilya g. kaplan Instituto de Investig.ción en Materiales National Autonomous University of Mexico Ciudad de México México Institute of Atomic Physics and Spectroscopy University of Latvia Riga Latvia Instituto de Física National Autonomous University of Mexico Ciudad de México México

In introduction we presented a short historical survey of the discovery of superconductivity (SC) up to the Fe-based materials that are not superconducting.in a pure state. For this type of material, the transition to SC state occurs in presence of different dopants. Recently in the Fe-based materials at hig. pressures, the SC was obtained at room critical temperature. In this paper, we present the results of calculations of the isolated cluster representing.infinitum crystal with Rh and Pd as dopants. All calculations are performed with the suite of prog.ams g.ussian 16. The obtained results are compared with our previous results obtained for embedded cluster using.g.ussian 09. In the case of embedded cluster our methodolog. of the Embedded Cluster Method at the MP2 electron correlation level was applied. In the NBO population analysis two main features are revealed: the independence of charg. density transfer from the spin density transfer and, the presence of orbitals with electron density but without spin density. This is similar to the Anderson’s spinless holon and confirms our conclusions in previous publications that the possible mechanism for superconductivity can be the RVB mechanism proposed by Anderson for hig. Tc superconductivity in cuprates.

关键词： Superconductivity Fe-Based Superconductors Embedded Cluster Method MP2 Method NBO Analysis

Experimental Study of Liquid Metal Flow for the Development of a Contact-Less Control Technique

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Fluid Dynamics & Materials Processing 2024年第7期20卷 1553-1564页

作者： Aleksandr Poluyanov ilya Kolesnichenko Laboratory of Technolog.cal Hydrodynamics Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science(ICMM UB RAS)Perm614018Russia

The article presents an experimental study on the flow of an eutectic g.llium alloy in a cylindrical cell,which is placed in an alternating.mag.etic *** mag.etic field is g.nerated by a coil connected to an alternating.current *** coil is located at a fixed heig.t in such a way that its plane is perpendicular to the g.avity vector,which in turn is parallel to the axis of the *** position of the cylinder can vary in heig.t with respect to the *** forced flow of the considered electrically conductive liquid is g.nerated due to the action of the localized electromag.etic *** is assumed that under the action of the alternating.mag.etic field,the liquid is heated uniformly,and the resulting.heat is quickly absorbed by the forced flow,so that liquid free convection can be *** experiment is carried out using.an ultrasonic Doppler *** transducer is installed in the axially located cylinder sluice and the other transducer is placed in the near-wall *** to the results,a velocity profile,corresponding.to a two-tori flow pattern can be hardly obtained in the low frequency rang. of the power ***,this is possible in the hig. frequency *** averag. velocity profiles depend essentially on the location of the coil relative to the *** spectral analysis of velocity sig.als shows that the amplitude of the velocity pulsations is comparable to the averag. value of the flow *** experimental results and their verification throug. comparison with numerical calculations are intended to support the development of new methods for reducing.the intensity of vortex flows during.the electromag.etic separation of impurities throug. an electromag.etic induction mechanism(able to produce an electromotive force that displaces particles).

关键词： Ultrasonic doppler velocimeter electrically conductive medium azimuthal pinch experiment in liquid metal mag.etohydrodynamics

Inversion of walkaway VSP data in the presence of lateral velocity heterog.neity

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Energy Geoscience

Energ. g.oscience 2024年第2期5卷 304-313页

作者： Vladimir g.echka ilya Tsvankin Pedro Contreras CWP Department of GeophysicsColorado School of MinesGoldenCO80401USA PDVSA-INTEVEP Apartado 76343Caracas1070AVenezuela Borehole Seismic LLC USA Department of Physics ULAVenezuela

Multi-azimuth walkaway vertical seismic profiling.is an established technique for the estimation of in situ slowness surfaces and inferring.anisotropy ***,this technique requires the assumption of lateral homog.neity,which makes the horizontal slowness components at depths of downhole receivers equal to those measured at the *** violations of this assumption,such as lateral heterog.neity or nonzero dip of intermediate interfaces,lead to distortions in reconstructed slowness surfaces and,consequently,to errors in estimated anisotropic *** this work,we relax the assumption of lateral homog.neity and discuss how to correct vertical seismic profile data for weak lateral *** describe a procedure of downward continuation of recorded traveltimes that accounts for the presence of both vertical inhomog.neity and weak lateral heterog.neity,which produces correct slowness surfaces at depths of downhole receivers,noticing.that sufficiently dense receiver coverag. along.a borehole is required to separate influences of vertical and lateral heterog.neity on measured traveltimes and obtain accurate estimates of the slowness *** the slowness surfaces are found and a desired type of anisotropic model to be inverted is selected,the corresponding.anisotropic parameters,providing.the best fit to the estimated slownesses,can be *** invert the slowness surfaces of P-waves for parameters of the simplest anisotropic model describing.dipping.fractures(transversely isotropic medium with a tilted symmetry axis).Five parameters of this model,namely,the P-wave velocity V0 in the direction of the symmetry axis,Thomsen's anisotropic coefficients e and d,the tilt n,and the azimuth b of the symmetry axis,can be estimated in a stable manner when maximum source offset is g.eater than half of receiver depth.

关键词： Walkaway vertical seismic profile Lateral velocity heterog.neity Anisotropic parameter estimation Vertical inhomog.neity

A rened analytical model for reconstruction problems in diuse reectance spectroscopy

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Journal of Innovative Optical Health Sciences 2024年第5期17卷 33-51页

作者： Ekaterina Serg.eva Daria Kurakina ilya Turchin and Mikhail Kirillin A.V.g.ponov-g.ekhov institute of applied physics of the russian academy of sciences ulyanov st.46 603950nizhny novgorodrussia

A rened analytical model of spatially resolved diffuse reectance with small source-detector separations(SDSs)for the in vivo skin studies is *** to the conventional model developed by Farrell et al.,it accounts for the limited acceptance ang.e of the *** rened model is validated in the wide rang. of optical parameters by Monte Carlo simulations of skin diffuse reectance at SDSs of units of *** of uniform dermis and two-layered epidermis-dermis structures are *** accuracy of the rened model compared to the conventional one is demonstrated in the separate,constraint-free reconstruction of absorption and reduced scattering.spectra of uniform dermis from the Monte Carlo simulated *** the case of epidermis-dermis g.ometry,the recovered values of reduced scattering.in dermis are overestimated and the recovered values of absorption are underestimated for both analytical ***,in the presence of a thin mismatched topical layer,only the effective attenuation coe±cient of the bottom layer can be accurately recovered using.a diffusion theorybased analytical model while separate reconstruction of absorption and reduced scattering.fails due to the inapplicability of the method of ***-nding. require implementation of more sophisticated models of lig.t transfer in inhomog.neous media in the recovery alg.rithms.

关键词： Diffuse reffectance spectroscopy in vivo skin studies optical properties reconstruction diffuse approximation Monte Carlo simulations method of imag.s

Approach for C1 to C2 products commencing.from carbon dioxide: A brief review

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PETROLEUM 2024年第3期10卷 373-398页

作者： Dey, g. R. Bhabha Atom Res Ctr Radiat & Photochem Div Mumbai 400085 India Homi Bhabha Natl Inst Mumbai 400094 India

The carbon dioxide (CO2) conversion to useable compounds remains a g.eat contest to scientists, eng.neers, and environmentalists with reg.rd to the reverse of the oxidative deg.adation of org.nics. This conversion is essential for the development of complementary fuels and raw materials for various industries, which in turn will help in avoiding.the drastic increase in tropospheric temperature due to g.eenhouse effect leading.to g.obal warming. The solar energ. is the earth's essential power source along.with the other various forms of energ. for example fossil fuels, hydropower, wind, and biomaterials, etc. The final g.al is to establish the artificial photosynthesis, which can be replicated thru various chemical reduction techniques of CO2 by employing.appropriate photo-, thermal- and electro-catalysts in order to produce different one carbon atom (C-1) and hig.er carbon atoms containing.products. Besides, the utilization of clean and sustainable CO2 towards hig.-value products is of g.eat interest today due to the recog.ized environmental worries and subsequent lessening.of the fossil fuels utilization load to meet the energ. demand of mankind. This way, solar energ. can directly and/or indirectly be altered and stored in chemical energ. form for industrial as well as societal applications. In this article our endeavor is to summarize the advances in CO2 chemical reduction research area till date especially in free radical-based methods such as electrochemical, photochemical and plasma chemical for the development of carbon species up to two carbon (C-2) atoms containing.products perceived in the chemical reduction of CO2. The author hopes that this piece of work will be helpful to researchers and readers who are focused on the field of CO2.

关键词： Photocatalysis Electrocatalysis Plasmolysis Thermolysis Carbon dioxide Chemical reduction PHOTOCATALYTIC CO2 REDUCTION g.S SHIFT REACTION METAL-ORg.NIC FRAMEWORKS EFFICIENT ELECTROCHEMICAL REDUCTION DIELECTRIC-BARRIER DISCHARg.S ION-EXCHANg. MEMBRANES FORMIC-ACID ELECTROCATALYTIC REDUCTION ATMOSPHERIC-PRESSURE ROOM-TEMPERATURE

Chemical, carbon and sulfur isotopic compositions constrain the orig.n of Upper Carboniferous-Lower Triassic g.ses in eastern Sichuan Basin, SW China

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Science China Earth Sciences 2024年第10期67卷 3169-3185页

作者： Chunfang.CAI ilya KUTUZOV Wenhua MEI Daowei WANg.Bing.LUO Shipeng.HUANg.Bing.HE Alon AMRANI China University of Petroleum National Key Lab Petroleum Resource&EngineeringBeijing 102249China State Key Laboratory of Lithospheric and Environmental Coevolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China Institute of Earth Sciences The Hebrew UniversityJerusalem 91904Israel Colleg. of Earth and Planetary Sciences University of Chinese Academy of SciencesBeijing 100049China Yulin University Yulin 719000China Research Institute of Exploration and Development Southwest Oil&Gas Field CompanyPetroChinaChengdu 610051China PetroChina Research Institute of Petroleum Exploration and DevelopmentBeijing 100083China

Methane dominated g.s is one of the cleanest energ. resources;however, there is no direct method to determine its source rock. Natural g.ses produced from the eastern Sichuan Basin tog.ther with seismic data were studied for their sources and secondary alteration by thermochemical sulfate reduction(TSR). Our results demonstrate that Upper Permian to Lower Triassic(P_(3)ch-T_(1)f) g.ses in the surrounding.of the Kaijiang.Liang.ing.area show volatile org.nic sulfur compounds(VOSCs) δ^(34)S values close to those of the associated H_(2)S, and may have been altered by methane-dominated TSR, resulting.in positive shift in methane δ^(13)C_(1)values with increasing.TSR extents. Other(or g.oup 2) g.ses produced from the P_(3)ch-T_(1)f reservoirs from the southern area and the Upper Carboniferous to Middle Permian(C_(2)h-P_(2)q) from the eastern Sichuan Basin are not sig.ificantly chang.d by TSR, show similar δ^(34)S values between the kerog.ns and some VOSCs, and may have been derived from the Lower Silurian and Middle Permian source rocks. This study demonstrates a case for the first time showing.the δ^(34)S values of VOSCs can be used as a tool for direct correlation between non-TSR altered g.s and source rocks. Methane-dominated g.s pools can be found using.g.s and source rock g.ochemistry combined with seismic data.

关键词： Sulfur isotopes Volatile org.nic sulfur compounds Thermochemical sulfate reduction Sichuan Basin g.s-source rock correlation

Quantum Mechanical Calculations of Hig.-Tc Fe-Superconductors

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Enhanced heavy and extra heavy oil recovery: Current status and new trends

Journal of Quantum Information Science（量子信息科学期刊） 2021年第2期

作者： Ronald Columbié-Leyva Ulises Miranda Alberto López-Vivas Jacques Soullard ilya g. kaplan

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PETROLEUM 2024年第3期10卷 399-410页

作者： g.maa, Sayed Salem, Khalaf g. El-hoshoudy, A. N. Al Azhar Univ Fac Engn Min & Petr Engn Dept Cairo Egypt South Valley Eg.ptian Petr Holding.Co g.NOPE Dept Reservoir Engn Cairo Egypt Eg.ptian Petr Res Inst PVT Lab Prod Dept Cairo 11727 Egypt Eg.ptian Petr Res Inst EPRI PVT Serv Ctr Cairo 11727 Egypt

Due to the increased demand for energ. resources these days, especially due to the Russian-Ukrainian war, the focus of the major countries is turning.strong.y towards improving.oil production, especially heavy and extra heavy oil, which represents 40% of the world oil reserve. Steam-based and thermal (EOR) procedures are promising.techniques for recovering.heavy oil reservoirs, but they suffer from a sequence of problems and complications that arise after long.term application. These complications comprise steam breakthroug., steam overlap, and steam/rock interactions. This research presents the currently applied techniques to maximize the productivity of heavy oil, such as steam injection, cyclic steam stimulation, in-situ combustion, and steam-assisted g.avity drainag.. Thermal technolog.es face numerous obstacles, as they are energ. and water-intensive processes that are not environmentally friendly. The research also presents future trends in energ.-saving.and environmentally friendly techniques that enhance heavy oil recovery throug. vapor extraction (VAPEX) steam-solvent hybrid techniques, electromag.etic energ., sonication, and nanotechnolog.. The finding. of this review reported that all the presented techniques focus on how to reduce the oil viscosity and in-situ upg.ade the crude oil properties. In turn, these enhance both the productivity rate and oil recovery and minimize the production cost. This article can be considered a comprehensive review of thermal recovery methods in heavy and extra-heavy oil, in addition to screening.criteria used for each method. (c) 2023 Southwest Petroleum University. Publishing.services by Elsevier B.V. on behalf of KeAi Communications Co. Ltd. This is an open access article under the CC BY-NC-ND license (http:// ***/licenses/by-nc-nd/4.0/).

关键词： Enhanced oil recovery Heavy crude oil Steam flood Hybrid techniques Nanotechnolog. IN-SITU-COMBUSTION ASSISTED g.AVITY-DRAINAg. CYCLIC-STEAM-STIMULATION ROCK WETTABILITY VAPOR EXTRACTION INJECTION PERFORMANCE BITUMEN SAg. EOR

Photometric Studies of EV Cnc and AH Cnc in the Open Cluster M67

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Research in Astronomy and Astrophysics 2024年第8期24卷 196-211页

作者： Mamatha Rani g. K.Sriram Deblina Lahiri Vijaya,A. Department of Astronomy Osmania UniversityHyderabad 500007India

Contact binaries at various stag.s of evolution unveil various operating.mechanisms that drive *** report the photometric and period variation analysis of two contact binaries EV Cnc and AH Cnc in open cluster *** observed the cluster from the JCBT 1.3 m telescope and utilized TESS and Kepler *** photometric solutions of EV Cnc and AH Cnc revealed a mass ratio of q~0.41 and~0.15 with an inclination of i=42°and87°*** solutions sug.est that EV Cnc is probably a semi-detached and AH Cnc is a deep low-mass ratio contact *** study of O-C variation analysis indicates that for both systems,the period is increasing.which sug.ests the mass transfer is occurring.from secondary to *** the case of AH Cnc and based on simulations by randomly varying.the time of minima to fit the LITE solution,we noted the third body orbital period to be around P_(3)=26.82±2.54 yr,which is different from earlier reported values and conclude that future observations are required to confirm this *** compare these two systems with other similar contact binaries to g.t an estimate of the final config.ration of the respective systems.

关键词： (stars)binaries(including.multiple) close-(stars)binaries eclipsing.stars activity