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|  | | 为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法,我们为您准备了出自英文原文的大量英语例句,供您参考。 | |
Reductive group actions on affine quadrics with 1-dimensional quotient: Linearization when a linear model exists
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A linear model for a given action is a linear orthogonal action with the same orbit types and equivalent slice representations.
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We prove that if a reductive group action on an affine quadric with a 1-dimensional quotient has a linear model, then the action is linearizable.
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Using the path model and the theory of crystals, we generalize the concept of patterns to arbitrary complex semi-simple algebraic groups.
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In the model situationD is the Siegel disc,S is the manifold of Lagrangian subspaces andG is the symplectic group.
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| | 1. The conformity of the pattern of Cicindela anchoralis to what has been considered typical of the genus becomes in- telligible if the middle band, which is undoubtedly the most variable of the markings of this species, is assumed to have shifted forward and to have developed extensions both cephaled and caudad along the lateral margin and on the disc of the eIytron.2. The variation of the pattern is of the continuous type and proceeds in one principal direction. As expected, some in- dividuals depart from... | | 斑蝥科甲虫翅鞘色型之差異,在一部份種類中,極为顯著。本篇所論,根據中國种錨紋斑蝥,於廿二年夏採於厦門北岸,計雌雄共九百餘個,內有交配者六十二對,所得結論如下: (一)本種色型,甚为異特。若以美人薛福特氏所立之本屬理想模式色型推解,則其中間淡色横斑,較为移前,其左右則向上下分枝成H形。 (二)此種色型之變異為連續式仝趨一主要方向,但依其變異之分岐,可别为十種副式色型,詳情已於西文中加以討論。 (三)雄虫翅鞘之中間淡色横斑變異較大,其深色紋斑之傾向於縮小亦因之較雌性为甚。 (四)兩性交配,与色型之差異,全無關係。 (五)大部份個數皆呈現中間色型。其趨向於兩極端者(深色或淡色特别發達者)乃屬少数。因此分類學者於記述变異極大之種類時,應发中間色型者為代表。 | | 文摘来源 | | ~~ | | 作者讨论了三个参变數大气模式的必要性,作者提出溫度平均遞減率(穩定性)是需要考虑的一个参变數,作者也將基培尔的理論推廣到三个参变數的大气模式,而得到天气系統發展的简单定性規律,即当(γ,h)<0時,地面气压降低,当(γ,h)>0時,地面气压升高。其中γ是对流層的平均遞減率,h是厚度,( )代表Jacobian式。 | | 文摘来源 | | Some 24 and 48-hr numerical forecasts for 500 mb topography over a part of Asiaare prepared by graphical method with a quasi-geostrophic two-parameter model.Theresult is in general rather good,but for the case of blocking,the negative height-change centersouth to the position of the blocking high is not forecasted and thus the blocking high doesnot appear on our prognostic chart.This is due to the neglection of the 500 mb divergence whichis of importance for the major development of weather systems on 500 m... | | 作者用准地转两层模式以图解方法试作了24小时及48小时亚洲部分的500毫巴高度预报。从所作的几个例子来看,有的预报结果较好,但像阻塞高压的一个例子中高压位置南边的负变高没有预报出来,因此预报图上没有阻塞高压的形成。原因主要是在准地转两层模式没有恰切地考虑到500毫巴的辐散场。作者指出500毫巴上天气系统有猛烈发展时500毫巴上的辐散场是比较大的,要考虑到后者的作用就必须应用三层模式或不用准地转假定。作者并指出了 Fj(?)rtoft 的图解方法也有不小的误差。 | | 文摘来源 | |   | | << 更多相关文摘 |
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