速度极限

At the same time, the ballistic limit curves of the Whipple shield in a velocity range from 0.5 km/s to 5.5 km/s was obtained. Comparing to the predicted curve from Christiansen ballistic limit equation, the experimental minimum critical projectile diameter is slightly greater than the prediction.

通过固定弹丸直径，改变弹丸撞击速度，寻找临界撞击速度的方法获得了铝合金Whipple防护结构在0.5～5.5 km/s撞击速度区间内的撞击极限曲线，并与由Christiansen撞击极限方程得到的撞击极限曲线进行了比较，结果表明，实验最小临界弹丸直径略大于预测值。

The limit oxygen concentration and the limit gas velocity are critical index to evaluate the flammability of materials.

极限氧气浓度和极限气流速度两个极限参数，是衡量材料可燃性的关键指标。

A experimental measuring system of double-illuminator method was used in order to study the history of collapse parameters include two dimensional Lagrange velocity and Taylor angle about two type of spherical liners. The final velocity,final Taylor angle and characteristic time of specified particles on inner wall of liners were measured .

文中应用二维拉氏速度光学测量技术，测得两种球缺形药型罩在炸药驱动下内壁给定位置的运动参数变化历程，包括速度和台劳角变化历程，并得出其极限速度、特征加速时间和极限台劳角。

Chapter 2 deals with some refinements of the central limit theorem for a class of non-uniformly hyperbolic dynamical systems called Youngs system, such as local central limit theorem and so-called Berry-Esseen theorem giving the rate of convergence in the central limit theorem.

在第二、三章中，我们考虑一类重要的非一致双曲动力系统的统计性质-中心极限定理，及其进一步的精细结果如局部中心极限定理，带有收敛速度的中心极限定理。

Chapter 2 deals with some refinements of the central limit theorem for a class of non-uniformly hyperbolic dynamical systems called Young\'s system, such as local central limit theorem and so-called Berry-Esseen theorem giving the rate of convergence in the central limit theorem.

在第二、三章中，我们考虑一类重要的非一致双曲动力系统的统计性质-中心极限定理，及其进一步的精细结果如局部中心极限定理，带有收敛速度的中心极限定理。

The velocity field and the velocity equation of the slip surface family may be used to establish a new ultimate analysis method-Generalized Limit Equilibrium Method.

由速度场与滑动面族关系的速度方程，可以建立一种新的极限分析方法－广义极限平衡法。

The results of numerical analysis show that the elastic modular and the poisson ratio have no effect on two-dimensional bearing capacity, but can affect the ultimate bearing capacity of three-dimensional foundations and control the convergence and precision of finite element calculation; the earth pressure coefficient controls the geostatic stress of foundation, sequentially affects the ultimate bearing capacity of foundations and the convergence of numerical calculation. When calculating the ultimate bearing capacity of undrained saturated foundation, the complete formulation exists shear locking, and reduce formulation exists hourglassing, so the hybrid formulation is suitable to imitate the geomaterial. When the soil obeys nonrelevent flow rule, the yielding function is different from potential function, and the elastic-plastic matrix of soil is asymmetric, so the unsymmetry numerical solver and appropriate finite element mesh is required.

研究结果表明，土体弹性模量和泊松比对二维基础极限承载力没有影响，但是影响着三维矩形基础的极限承载力，控制着ABAQUS数值算法的计算精度与收敛速度；地基土压力系数控制着地基土体中的地应力平衡，从而影响着二维条形基础和三维矩形基础的极限承载力和地基破坏包络面；对于不排水饱和软黏土地基，常规的完全积分单元会造成剪力自锁现象，而减缩积分单元则存在过于柔化的现象，故采用杂交单元来模拟较合适；当土体服从非关联流动法则时，屈服函数与塑性势函数之间存在差异，从而导致土体弹塑性矩阵呈现非对称性，在有限元计算中必须采用非对称数值解法，并且合理地划分单元才能对极限承载力进行准确求解。

All weapon types probably peak at the same speed, so the fastest possible Polearm weapon swing would probably be just as fast as the fastest possible one-hand sword swing.

所有类型的武器的速度极限是一样的，所以最快的Polearm weapon会和最快的one-hand sword一样快。

It was shown by experimental results that ther e a re four factors playing chief roles on processing of fin such as geometr ic parameters of cutting tool, depth of extrusion, feed and speed of choppin g-ex trusion. For a certain cutting tool, a limit feed was brought up with a defini te extrusion depth under given chopping-extrusion speed.

实验结果表明，影响翅片形成的主要因素有刀具几何参数、挤压深度、进给量和劈切挤压速度；对某一刀具，在选定挤压速度时，一定的挤压深度对应一个极限进给量，一定的进给量对应一个极限挤压深度。

We have firstly calculated and compared the different flow rates by applying various aliasing velocities in the patients with mitral insufficiency, mitral stenosis and ventricular septal defect as well, and suggest that the most uitable aliasing velocities for the hemisphierical flow cenvergence calculation were about 46cm/sec for mitral insufficiency, 37cm/sec for mitral stenosis and 58cm/sec for ventricular septal defect respecively.

首次在二尖瓣关闭不全、二尖瓣狭窄和室间隔缺损患者采用不同混叠极限速度分别计算、比较其流量，提出二尖瓣关闭不全、二尖瓣狭窄和室间隔缺损患者最适合半球血流会聚法计算流量的混叠极限速度分别为46、37和58cm/sec左右。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。