鞍

In the region upstream of vortex breakdown, the sectional streamlines emanating from the leading edge spiral inward to primary vortex and in the region downstream of the breakdown, on the other hand, the streamlines separating from the leading edge are not entrained into the vortex core in the instantaneous sense. Along the axis, the topology of the primary vortex alters several times starting from stable focus near the apex to unstable focus, and lasts back to stable focus near wake edge, the stable hmit cycle and unstable limit cycle are shown in this evolution.

发现在截面流线谱中，即使奇点的类型、数目及位置相同，奇点的连接方式也有可能不同；旋涡破裂点前，主涡由来自前缘的力线卷绕而成，主涡焦点与前缘半鞍点相连，旋涡破裂后，来自前缘的力线不再卷入主涡，主涡焦点与对称面上的鞍点相连：在流体由翼尖流向后缘的过程中，截面流线谱的拓扑结构发生了多次变化，主涡焦点相继由稳定状态转变为不稳定状态，最后又转化为稳定状态，并先后出现了稳定的极限环及不稳定极限环。

Secondly, method of Taylor series is used to approximate the slow manifold and the O approximation of the slow manifold is given; slow dynamics such as saddle node bifurcation which has been proven to be the same as that for the full system is analyzed; at the same time, fast dynamics including bifurcation conditions and domain of attractor of the stable equilibrium are also analyzed; the attracting region which consists of the stable manifold of the unstable equilibrium and stable equilibrium is given; we found that when the inner flux decay increases, the domain of attractor is enlarged.

首先，给出了电力系统SMIB模型的时间尺度分解，得到标准的奇异摄动模型；其次，利用幂级数方法，给出了慢流形的O近似M〓，分析了在慢流形M〓上的慢动态，得到了慢子系统的鞍结分支值，并证明此分支值与原系统的鞍结分支值相同；分析了快子系统的平衡点和全局分支的存在条件，给出由不稳定平衡点的稳定流形与稳定平衡点形成的吸引域；并研究内部电压对稳定域的影响，发现稳定域随内部电压增加而扩大；最后给出整个系统的稳定平衡点的近似吸引域。

By using the theorem of alternative,we obtain the necessary and sufficient conditions for strong efficient solutions to be the generalized saddle point in vector optimization problems with set-valued maps under the assumption of nearly cone-subconvexlikeness.

Yang[1]引进了近似锥-次类凸集值映射的概念，其他广义凸集值映射都是它的特殊形式。最近，Sach[2]在集值优化问题中引进了一种广义鞍点，通常的Lagrange泛函的鞍点是它的一种特殊形式。

A new method was given in European harmonized standard EN13445 Unfired Pressure Vessels.

最近，欧洲协调标准EN13445〈非直接受火压力容器〉提出了一种不同于传统方法的多鞍座卧式容器的最新设计方法，这是多鞍座卧式容器设计第一次正式写入标准。

A new method was given in European harmonized standard-EN13445 "Unfired Pressure Vessels".

最近，欧洲协调标准EN13445《非直接受火压力容器》提出了一种不同於传统方法的多鞍座卧式容器的最新设计方法，这是多鞍座卧式容器设计第一次正式写入标准。

The kernel of the problems stressed are the two: the link path of saddle point to saddle point on the topological structure is instable, so it will break easily with the changing of main control coefficient, and nonlinear bifurcation of the vortex structure along the vortex axis line.

强调了不稳定拓扑结构中的鞍—鞍连接轨线随主控参数变化而"撕裂"、以及旋涡沿轴线的非线性分叉是非对称形成与多涡系演化的途径。

The sphenoid sinus was classified according to degree of pneumatization towards sphenoid bone,small wing of sphenoid bone and epippium.Results:The sphenoid sinus could be divided into five types such as concha type,pre-sella type,semi-sella type,sella type and sella-occipital type.

观测蝶窦气化发育的情况，根据蝶窦向蝶骨体、蝶骨小翼及鞍背气的情况，根据蝶窦向蝶骨体、蝶骨小翼及鞍背气化的程度进行分型分度。

This conclusion corrects a mistaken resultIn the planar quadratic system there is not cubic algebraical saddle-nodeseparatrix-loop,in which the author asserrts that quadratic system has no the cubicalgebraical saddle-node separatrix cycle .

本文证明了平面二次系统的三次代数同宿轨线上可以存在鞍结点，并且二次系统可以存在含鞍结点的无返回映射三次曲线分界线环。

Hypothalamic-pituitary functions in eight children with intrasellar and suprasellar tumors (five craniopharyngioma, one epidermoid cyst, one germinoma, one pituitary adenoma) were studied before and after surgical treatment. Three children who received endocrine function assessment before operation showed at least one hormone deficiency.

本文收集8例患有蝶鞍内或蝶鞍上方肿瘤的病童，分析手术前或手术后的下视丘一脑垂腺机能，所有於手术前接受下视丘一脑垂腺机能评估的病童，皆至少有一个荷尔蒙分泌异常，其中以生长激素及促性腺激素的异常最常见。

Methods 10 specimen of adult cadaver heads were collected and the following data was measured under microscope: the distance between the pterion and seller region, and that between the pterion and anatomical landmarks of the middle cranial base as well as the angle between them, which provided data basis for choice of various surgical instruments.

方法在显微镜下对10例成人尸头，测量其颞部锁孔下翼点至鞍区和中颅窝底解剖标志的距离和角度，为手术器械的选择提供依据，并对鞍区和中颅窝底不同解剖间隙进行观察。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失