Hausdorff convergence; almost nonnegative Ricci curvature; Betti number; harmonic 1-form; nilpotency; splitting theorem; positive sectional curvature; gradient curve

基礎(chǔ)科學(xué)亚洲色淫淫网，數(shù)學(xué)国产永久视频，幾何、拓?fù)銱ausdorff收斂国产精品久久久狼友；幾乎非負(fù)Ricci曲率欧美一级夜夜爽老妇；貝蒂數(shù)；調(diào)和1-形式男人天堂网址在线；冪零指標(biāo)手机看片日韩精品视频在线；分裂定理999国产一区二区三区；正截面曲率；梯度曲線

If we give some restrician to the intrinsic quantities of submanifolds, such as second fundamental form, scalar curvature,Ricci curvature or sectional curvature,then we can get some new property of the submanifolds.The procedure is called pinching problem of submanifolds.

對子流形的第二基本形式模長平方s黄片操美女，數(shù)量曲率R日韩国产欧美精品毛片，Ricci曲率R_及截面曲率R_等內(nèi)在量，加以某種限制国产在线精品国自产拍影院同，從而得到子流形的某些性質(zhì)日韩美乳无码观看网站免费，叫做子流形的pinching問題欧美性爱与欧美性爱。

The Pinching problems are discussed on the sectional curvature of compact space-like pseudo-umbilical submanifolds M~n with parallel mean curvature vector in De Sitter space S~_p, and the theory of reduction of the codimension is obtained in De Sitter space through evaluating the Laplacian of square of the length.

討論了De Sitter空間Snp+p中www.c黄，具有平行平均曲率向量的緊致類空偽臍子流形Mn的截面曲率的拼擠問題，通過估計(jì)第二基本形式模長平方的Laplacian欧美老妇乱惀，得到了De Sitter空間中的余維數(shù)壓縮定理激情你懂的。

The complete pseudo-umbilical submanifolds with parallel mean curvature vector in constant curvature space;2. In this paper,the pseudo-umbilical submanifolds with parallel mean curvature vector in pseudo-Riemannian manifold is discussed.

研究了偽黎曼流形中具有平行平均曲率向量的偽臍子流形，Npn+p為n+p維完備連通偽黎曼流形国际一级黄色片，它的截面曲率KN滿足a≤KN≤b呦福利导航，Mn為Npn+p中緊致的具有平行平均曲率向量的偽臍子流形。

If the infimum of sectional curvature R_c in M~n satisfies: then M~n must be totally geodesic in M~,T_c is the supremum of Ricci curvature and t_c is the infimum of Ricci curvature in M~

如果M~n的截面曲率下確界R_c滿足：則M~n一定是全測地的其中T_c青春草在线视频一区二区三区，t_c分別是M~(n+p上Ricci曲率上確界和下確界真人一级黄色视频。

Theorem 4 There is no compact totally real 2-harmonic submanifold with non-zero parallel mean curvature and positive sectional curvature in a locally symmetric Bochner -Kaehler manifold.

定理4局部對稱Bochner-Kaehler流形中不存在具有非零平行平均曲率向量且截面曲率大于零的緊致全實(shí)2-調(diào)和子流形。

Its amount has relation with acting load. The influence on sectional curvature of bending components is the greatest one, the ultimate curvature of corroding section decrease obviously, and the sectional curvature increases rather sharply with the increase of rust rate during the process of corrosion. The anti-cracking capacity of prestressed bending R. C. components may be damage. For the convenience of engineering usage and damage evaluation of structure, this paper presents a concept of sectional damage coefficient on the foundation of experimental and treatment study.

試驗(yàn)與理論研究均表明亚洲是图综合，受壓區(qū)鋼筋銹蝕后對普通鋼筋混凝土和預(yù)應(yīng)力鋼筋混凝土受彎構(gòu)件的承載力影響均不大欧美一级黄色视频A片，但對構(gòu)件的正常使用性能有較顯著的影響，受壓區(qū)鋼筋銹蝕過程中国内黄色a片不卡，截面剛度有較顯著的下降欧美浓毛老太乱人伦视频在线，撓度及受壓區(qū)混凝土壓應(yīng)變隨銹蝕量增加而增加，增加值與使用荷載大小有關(guān)亚洲欧美偷乱区二区；受彎構(gòu)件的截面曲率所受影響最大中文字幕黄色，銹蝕后截面的極限曲率有明顯的下降，在使用荷載作用下国产干干干日日日，截面曲率則隨鋼筋銹蝕量的增加而有較顯著的增加国产AV色8X；而預(yù)應(yīng)力混凝土受彎構(gòu)件的抗裂度會下降。

Theorem 3 Let M~n be a compact totally real 2-harmonic submanifold in M~n which is a locally symmetric Bochner-Kaehler manifold.If Ricci curvature of M~n is nonegative and positive at a point at least,then the holomorphic sectional curvature of M~n is a postive constant number.

定理3設(shè)M~n是局部對稱Bochner-Kaehler流形M~n的緊致全實(shí)2-調(diào)和子流形综洲合亚洲视频，若M~n的Ricci曲率非負(fù)且至少在一點(diǎn)為正成人版麻豆无线视频在线看免费，則M~n具有正常數(shù)全純截面曲率。

C arbitrarily inequiaxial T-shaped, L-shaped and "十"shaped columns subjected to 792 load conditions is calculated using compiled C++ programme. On the basis of calculation results, the factors influencing the worst load orientation are analyzed and load orientation of the least curvature ductility of three kinds of sections is presented.Furthermore a analysis of failure mechanism for R.

本文采用非線性全過程分析方法人人操人人干人人做，采用C++語言編制了不等肢異形柱截面曲率延性比的計(jì)算程序欧美一级久久，首先計(jì)算了不等肢T形、L形和十字形柱在792種工況下的截面曲率延性比欧美日韩国产在线mv，在此基礎(chǔ)上分析了影響不等肢異形柱截面延性的最不利荷載方向的各種因素www.taohongbei.com，并得出了這三種截面不等肢異形柱在上述工況下的截面延性最不利荷載方向生活A片。

In this paper, we consider the n-dimensional hypersurfaces (n≥3) with vanishing Mbius form Φ.

本文考慮了S(上標(biāo) n+1)(n≥3)中具有消失Mbius形式Φ的超曲面：對具有調(diào)和曲率張量的超曲面進(jìn)行分類，進(jìn)而一级A片一级毛片一级人6，在Mbius度量的意義下久久国产自偷免费播放，對Einstein超曲面和具有常截面曲率的超曲面也進(jìn)行了分類。

curvature：曲率

可以選取"曲率"(Curvature)免费变态视频网站网地址、"半徑"(Radius)、"相切"(Tangent)或"位置"(Position) 類型的出圖. 根據(jù)選取的出圖類型,所選曲面或面組上的橫截面顯示在 Pro/ENGINEER 圖形窗口中. 在"示例"(Sample) 框中選取"質(zhì)量"(Quality)欧美偷操、"數(shù)目"(Number) 或"步

mean curvature：平均曲率

連續(xù)性評估方法主要通過位置連續(xù)(Position),切平面(Tangent Plan).高斯曲率(Gaussian Curvature),截面曲率(Section Curvature)国产亚洲午夜精品A一区二区、平均曲率(Mean Curvature)和絕對曲率(Absolute Curvature)等;而曲面光滑性評估多采用反射線法、高光線法和等照度法等.

sectional curvature：截面曲率

sectional area 截面積 | sectional curvature 截面曲率 | sector 扇形

tangent：相切

可以選取"曲率"(Curvature)欧美福利二区、"半徑"(Radius)狂野欧美激情性XXXX按摩、"相切"(Tangent)或"位置"(Position) 類型的出圖. 根據(jù)選取的出圖類型,所選曲面或面組上的橫截面顯示在 Pro/ENGINEER 圖形窗口中. 在"示例"(Sample) 框中選取"質(zhì)量"(Quality)、"數(shù)目"(Number) 或"步