截面

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。

Then, how to determine the shear design values for different structural member and different strengthening location is given out, which could be the reference for design and computation of strengthening structural member by enlarging section method. Fifthly, Full-range shear experiment of two reinforcement concrete arch specimens with strengthening at soffit location by enlarging section method are designed and conducted.

第四，对于增大截面法加固构件，按照极限状态的计算原则，对外荷载作用下的新老混凝土结合面剪力设计值进行研究，提出了不同类型构件及不同的加固部位，新老混凝土结合面的剪力作用设计值的确定方法，可为采用增大截面法加固构件的设计计算提供依据。

The load transfer and settlement behavior from the simulation results are also analyzed: most of the column load concentrates on the enlarged column cap, and distributes quickly, there is more load attenuation at the variable section. The skin friction of enlarged column cap develops more adequately than underside column. The column settlement concentrates on enlarged column cap, and soil settlement concentrates on a little area below the variable section.

利用三维数值模拟分析了钉形搅拌桩复合地基的荷载传递和变形特性：钉形搅拌桩桩身荷载主要集中在扩大头部分，且衰减较快，变截面处桩身轴力有较大衰减，扩大头桩侧摩阻力较大，下部桩体侧摩阻力较小；桩身变形集中在扩大头，桩间土变形则集中在变截面以下较短范围内。

The flexural strength of this spicule is 394.34GPa, the flexural modulus increases with the growth direction of rounds.

这种骨针的弯曲强度为394.34GPa，弯曲模量随生长环带由中心向外逐渐增大；截面硬度为2.933GPa，截面杨氏模量为33.308GPa。

Based on the spinneret holes,spinning liquid, spinning technology ,it analyzed the influence of these factors to the fiber profiles,fiber performances and the use of profiled fiber.

文章从喷丝孔形状、纺丝液性质、纺丝工艺条件等方面分析了这些影响因素对纤维截面、纤维性能及纤维用途的影响，并以几种典型异形纤维为例阐述了不同截面纤维的用途，指出异形纤维是具有广阔前景的一种差别化纤维。

As a result of the decreasing stimulated emission cross section with increasing temperature, the laser gain declines obviously.

温度的升高导致激光介质的受激发射截面发生改变。有效受激发射截面的改变导致激光增益的变化。

This paper presents the calculated results of photoioni/ation cross sections of the outer-most subshell for ground-stafce Sm using four kinds of potential and for three excited states U with the parameterized model potential of included polarization correction.

本文给出了使用四种不同形式的势对Sm基态光学电子所属壳层光电离截面计算的结果，同时给出了U原子三个激发态参量形式的极化修正模型势光电离截面的计算结果。

The ratios of tantalum L-subshell production cross sections were calculated according to the experimental data.

计算了Ta的L各支壳层产生截面的比值和总截面的比值。

Based on orthogonal function unfolding theory, the transverse fields can be represented as a superposition of waveguide modes. And according to coupled-wave theory, the time-dependent multi-mode coupling-wave equations (or the generalized telegrapher's equations) and the coupling coefficients among the different modes were deduced. The generalized telegrapher's equations are a set of coupled one-dimensional partial differential equations for the amplitudes of the modes.

应用正交函数的展开理论，将变截面波导中的电磁场表示为横电波和横磁波本征模式的级数；然后根据耦合波理论，推导了考虑波导金属壁有限电导率的变截面波导时域多模耦合波方程组及各模式间耦合系数的表达式。

The development of WIMS 82-group library WIMS-D is a lattice code for thermal reactor, and it has its own 69-group multi-group constants library.

WIMS 82群截面库的研制 WIMS/D是一个适用于热中子反应堆计算的栅元计算程序，WIMS 69群群截面库是其本身所带的工作库，该库的能量上限为10MeV。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷