progestin
发表于 2025-3-26 22:44:13
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鸟笼
发表于 2025-3-27 01:16:31
H. M. Nussenzveiging of the center and cyclicity problems.Includes foundation.In the last three decades, advances in methods for investigating polynomial ideals and their varieties have provided new possibilities for approaching two long-standing problems in the theory of differential equations: the Poincaré center
美色花钱
发表于 2025-3-27 08:45:06
of the sets of common zeros of collections of polynomials in the coefficients of the underlying family of systems of differential equations. These sets of common zeros are termed .. They are determined not so much by the specific polynomials themselves as by larger collections of polynomials, the so
uveitis
发表于 2025-3-27 11:48:03
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拱墙
发表于 2025-3-27 16:52:56
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集聚成团
发表于 2025-3-27 19:52:51
G. Contopoulosperspective on physical conditions in the remarkable luminous dust and gas cloud complex at the Galactic Center. Simple array arithmetic with the images is used to calculate the color temperature and opacity of the emitting dust, and the silicate extinction distribution, with 1 arcsecond spatial res
Exposure
发表于 2025-3-28 00:37:32
G. W. GibbonsRiver during floods and from the atmosphere as dry and wet deposition and via nitrogen fixation. Anthropogenic sources are negligible in most parts of the várzea. From a few studies on nitrogen fluxes in Amazonian environments there is some evidence that nitrogen can be a limiting factor for primary
树上结蜜糖
发表于 2025-3-28 04:24:45
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Odyssey
发表于 2025-3-28 09:41:31
plies to temperate wetlands rather than tropical floodplain lakes, for which still very few modelling studies exist. Their hydrological and hydrochemical complexity, often ill-defined boundaries, as well as complex and little understood interface processes (e.g. sediment-water exchange of chemicals,
gimmick
发表于 2025-3-28 13:31:35
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