Results 11 to 20 of about 429,621 (305)
Upper Bounds for the Isolation Number of a Matrix over Semirings
Mathematics, 2019 Let S be an antinegative semiring. The rank of an m × n matrix B over S is the minimal integer r such that B is a product of an m × r matrix and an r × n matrix.
LeRoy B. Beasley, Seok-Zun Song
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Matrix Isolation in Heterocyclic Chemistry
, 2022 Herein, we describe studies relevant to heterocyclic chemistry carried out with low-temperature matrix isolation technique in conjugation with infrared (IR) spectroscopy. These studies comprise structural characterizations, ultraviolet (UV) and thermal reactivity, IR-induced processes, and quantum tunneling reactions.
Roque, José P. L. +2 more
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Matrix Isolation Spectroscopy of Small Molecules: An ab initio Modeling Study [PDF]
, 2021 Matrix isolation spectroscopy refers to experimental techniques that consist of trapping chemical compounds in inert frozen matrices and examining them with spectroscopic methods.
Bader, Frederik
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Matrix-Assisted Processes in CH4-Doped Ar Ices Irradiated with an Electron Beam
Methane, 2023 The relaxation processes induced by exposure of the Ar matrices doped with CH4 (0.1–10%) to an electron beam were studied with a focus on the dynamics of radiolysis products—H atoms, H2 molecules, CH radicals, and energy transfer processes.
Mykhailo Bludov +3 more
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ChemistryOpen, 2020 The refrigerant trans‐1,3,3,3‐tetrafluoropropene (HFO‐1234ze) is used as a replacement for former cooling agents that have been phased‐out due to their global warming potential or ozone depleting potential.
Dr. Jan Schwabedissen +6 more
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Molecules, 2019 Structural changes of glycolic acid (GA) complex with nitrogen induced by selective overtone excitation of the νOH mode were followed in argon matrices using FTIR spectroscopy.
Iwona Kosendiak +4 more
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Cluster-Based Improved Isolation Forest
Entropy, 2022 Outlier detection is an important research direction in the field of data mining. Aiming at the problem of unstable detection results and low efficiency caused by randomly dividing features of the data set in the Isolation Forest algorithm in outlier ...
Chen Shao +3 more
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Molecules, 2018 Chloro- and dichloro-methylsulfonyl nitrenes, CH2ClS(O)2N and CHCl2S(O)2N, have been generated from UV laser photolysis (193 and 266 nm) of the corresponding sulfonyl azides CH2ClS(O)2N3 and CHCl2S(O)2N3, respectively.
Yang Yang +4 more
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Possible isolation number of a matrix over nonnegative integers [PDF]
, 2018 summary:Let $\mathbb Z_+$ be the semiring of all nonnegative integers and $A$ an $m\times n$ matrix over $\mathbb Z_+$. The rank of $A$ is the smallest $k$ such that $A$ can be factored as an $m\times k$ matrix times a $k\times n$ matrix.
Jun, Young Bae +5 more
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Matrix Isolation of Pb and Pb2
The Journal of Chemical Physics, 1972 Lead vapor trapped at 20°K in Ar, Kr, Xe, SF6, and in mixtures of these matrix gases showed an atomic absorption line with no multiplet structure and molecular bands of Pb2. Warming the matrices above 20°K shifted the atomic line reversibly to the red while the molecular features did not shift. Bulk diffusion of isolated Pb atoms to produce Pb2 did not
Brewer, Leo., Chang, Chin-An.
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