查询词典 manifolds

A simple form of the unstable manifold s for the fixed points not being on the boundary;2. Aim To study singular points, closed orbits, stable manifolds and unstable manifold s of a second order autonomous Birkhoff system.

目的研究二阶Birkhoff自治系统的奇点、闭轨、稳定流形与不稳定流形，方法用常1微分方程的定性方法进行研究，结果与结论给出二阶Birkhoff自治系统的奇点判据、闭轨判据、双曲平衡点判据，得到与其相关的平衡稳定性、稳定流形与不稳定流形等。

Within differential geometry are the concepts of fiber bundles and calculus on manifolds , in particular, vector and tensor calculus .

微分几何包含这样的概念：纤维束和流形上的微积分，特别是矢量与张量微积分。

A tetrahedral mesh of approximately 3.1 million cells was used, with cells concentrated around the fuel manifolds.

阿四面体网格约310万美元用于细胞与细胞集中在燃料管。

In this dissertation, we focus on the incompressible surface obtained from theamalgamation of two 3-manifolds with torus boundaries and obtained some good results.

本文研究了由两个以环面为边界的3维流形作融合积所产生的3维流形中的不可压缩曲面，得到了一些良好的结果。

The chapter 2 is the main part of this paper,we discussed the Donaldsoninvariants of 4—manifolds 〓,combing with the results given inchapter 1 and using the techniques of standard dimension counting,transversality etc.of S.K.Donaldson.

首先在§2.2就〓（3维环面）讨论了4—流形X的SU（2）Donaldson不变量，在适当假设下证明了X的Donaldson不变量的一个消失定理（定理2.2.1），这一结果推广了Donaldson不变量的连通和定理。

These parameters are important for the design of adsorbent structures, the manifolds and the columns.

这些参数对于新型吸附剂结构设计及优化流路和柱尺寸都是非常重要的。

This paper analyzes the principle of the LP-LFC process,presents the physical and mathematical models of mould filling of the new process. The patterns including window-plate, ladders cluster, electromotor frame and exhausting manifolds are poured using LP-LFC process with AZ91D alloy, and the mould filling course is tracked with electrode touch point method. Based on above tests and experiments,the casting defects including short runs, cold laps, trapped gas,metal penetration, and so on, were investigated. The appearance characteristics,birth causes and influence factors of above defects are discussed in the article,diagrammatize modes of the defects forming is also given, and the measures of reducing or avoiding defects are put forward.

本论文分析了低压消失模铸造技术的工艺原理，建立了低压消失模铸造过程中金属液充型的物理和数学模型；在各种工艺条件下浇注了薄板窗体、阶梯模样簇、电机外壳和发动机排气管四个典型的模样和产品，用电极触点法记录了镁合金低压消失模铸造的充型过程；试验研究了镁合金低压消失模铸造中出现的浇不足、冷隔、气孔、粘砂等典型缺陷，分析了这些缺陷的形貌特征、形成原因及影响因素，给出了缺陷形成过程的图解模型，提出了减少和消除缺陷的工艺措施。

Large amounts of piping are to be seen on the deck running from the pump rooms to the discharge manifolds positioned an midships,port and starboard.

楼主你好，1，2，3，5应该问题不大，4段我有点疑惑，请见谅 1，可以看到一排巨大的管路在船舶甲板，从泵房连接到位于船中左右两舷的排油管站。

Large amounts of piping are to be seen on the deck running from the pump rooms to the discharge manifolds positioned an midships,port and starboard.

楼主你好，1，2，3，5应该问题不大，4段我有点疑惑，请见谅

We establish the analytic foundation of quaternionic contact manifolds.

证明中实际上蕴涵了Szego核的渐近展开。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。