搜索结果: 1-15 共查到“理学 elements”相关记录203条 . 查询时间(0.16 秒)
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Two families of $n$-rectangle nonconforming finite elements for sixth-order elliptic equations
六阶椭圆方程 矩形 有限元族
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2023/4/13
We propose two families of nonconforming finite elements on $n$-rectangle meshes of any dimension to solve the sixth-order elliptic equations. The unisolvent property and the approximation ability of ...
Bacteria could extract elements for modern tech sustainably（图）
细菌 工程改造 稀土元素
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2023/5/23
Cornell researchers are engineering bacteria to solve challenges of extracting rare earth elements from ore; the substances are vital for modern life but refining them after mining is costly, harms th...
Platinum-Group Elements Geochemistry and Chromian Spinel Composition in Podiform Chromitites and Associated Peridotites from the Cheshmeh-Bid Deposit, Neyriz, Southern Iran: Implications for Geotectonic Setting
Cheshmeh-Bid Chromitite trace elements platinum-group elements boninitic magma supra-subduction zone
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2018/4/10
Dunite and serpentinized harzburgite in the Cheshmeh-Bid area, northwest of the Neyriz ophiolite in Iran, host podiform chromitite that occur as schlieren-type, tabular and aligned massive lenses of v...
Discovering the cosmic mines of heavy elements（图）
cosmic mines heavy elements
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2017/10/26
The recent observation of gravitational waves and light produced by colliding neutron stars didn't just provide scientists with a transformative look at a rare cosmic event -- it provided an important...
Abundances of rare earth elements in crude oils and their partitions in water
rare earth elements crude oil partition coefficient NMR Junggar Basin
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2017/8/9
Patterns of the entire range of REE in crude oils and coexisting water, collected from mud volcanoes in Xinjiang Province of China, are reported here for the first time. Crude oils show light REE enri...
Primordial Black Holes May Have Helped to Forge Heavy Elements（图）
Primordial Black Holes Forge Heavy Elements
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2017/9/4
Astronomers like to say we are the byproducts of stars, stellar furnaces that long ago fused hydrogen and helium into the elements needed for life through the process of stellar nucleosynthesis.As the...
Cold Spring Harbor conference on Transposable Elements
BACTERIAL ORGANELLAR RETROTRANSPOSONS
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2016/7/29
You are cordially invited to participate in a new meeting on Transposable Elements to be held at Cold Spring Harbor Laboratory. The meeting will begin with dinner and the first session on the evening ...
Simultaneous determination of 58 major and trace elements in volcanic glass shards from the INTAV sample mount using femtosecond laser ablation-inductively coupled plasma-mass spectrometry
volcanic glass tephra LA-ICP-MS element abundance femtosecond lasert
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2017/4/10
Four volcanic glass samples on the INternational focus group on Tephrochronology And Volcanism (INTAV) sample
mount described by Kuehn et al. (2011) were analyzed to establish a new methodology for m...
THE BASE CHANGE FUNDAMENTAL LEMMA FOR CENTRAL ELEMENTS IN PARAHORIC HECKE ALGEBRAS
PARAHORIC HECKE Algebra
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2015/9/29
Let G be an unramified group over a p-adic field F, and let E/F be a finite
unramified extension field. Let θ denote a generator of Gal(E/F). This paper concerns the
ma...
SPLITTING FIELDS OF CHARACTERISTIC POLYNOMIALS OF RANDOM ELEMENTS IN ARITHMETIC GROUPS
SPLITTING FIELDS CHARACTERISTIC POLYNOMIALS RANDOM ELEMENTS ARITHMETIC GROUPS
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2015/8/26
We discuss rather systematically the principle, implicit in earlier works, that for a “random” element in an arithmetic subgroup of a (split, say) reductive algebraic group over a number field, the sp...
g-ELEMENTS OF MATROID COMPLEXES
g-ELEMENTS MATROID COMPLEXES
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2015/8/25
A g-element for a graded R-module is a one-form with properties similar to a Lefschetz class in the cohomology ring of a compact complex projective manifold, except that the induced multiplication map...
Trace elements mobility in soils from the hydrothermal area of Nisyros (Greece)
volatile elements fumarolic gases volcanoes
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2015/8/18
Nisyros Island, Greece, is a stratovolcano known for its intense hydrothermal activity. On June 2013, during a multidisciplinary field campaign, soil samples were collected in the caldera area to dete...
AUTOMATIC TIE ELEMENTS DETECTION FOR LASER SCANNER STRIP ADJUSTMENT
airborne laser scanning segmentation strip adjustment
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2015/8/13
Measurements with airborne laser scanners are performed in strips, usually with multiple length strips and a few cross strips. Due
to i) wrong or inaccurate calibration of the entire measurement syst...
GEOTRACES—A Global Study of the Marine Biogeochemical Cycles of Trace Elements and Their Isotopes
Marine Biogeochemical Cycles Trace Elements Their Isotopes
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2015/7/28
Since the late 1990s there has been a growing impetus for a comprehensive global study of the marine biogeochemical cycles of trace elements and their isotopes (TEIs). This has led to the development ...
A sweeping preconditioner for time-harmonic Maxwell’s equations with finite elements
Maxwell’s equations Frequency domain Finite element methods Preconditioners Fast solvers Perfectly matched layers Block LDLt factorization High-frequency waves
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2015/7/14
This paper is concerned with preconditioning the stiffness matrix resulting from finite element discretizations of Maxwell’s equations in the high frequency regime. The moving PML sweeping preconditio...