极限

Finally, we will see that the diffraction limited area in the field of view is proportional to the focal length.

最后我们将看到，衍射极限影响的区域与焦距是成比例的。

The validity of the method is demonstrated by comparison with results obtained from tests on a practical drive system. The influence of damper winding on performances of self-controlled synchronous motor, especially on commutation process and commutation limit, are analyzed in detail. It is shown that damper winding has little effect on increasing overload capability. The influences of field winding on torque, commutation process and overload capability are analyzed also.

然后在此基础上，分析了阻尼绕组和励磁绕组对自控式同步电动机性能的影响，包括对电磁转矩、换流过程和过载能力的影响，重点分析了阻尼绕组对换流过程和换流极限的影响，讨论了阻尼绕组在自控式同步电动机中的作用，得出阻尼绕组对提高过载能力作用不大的看法。

One of the players declared that it was not "humanly possible" to hit Finch's pitches.

另一个人则声称"人类的极限"也不如芬奇的击球。

It shows that the derivative of finite discrete function is locally a pproximate to the one under continuous case.

通过引入最佳平均逼近直线，分别从几何直观和极限情形两个角度，研究了有限离散函数的导数概念的表现。

For the reliability analysis of implicit limit state function, finite element analysis is a time-consuming process, and it impedes the application of normal importance sampling approach.

对于含有隐式极限状态方程的问题，重要抽样方法将大部分的计算时间用于结构有限元分析，这使得重要抽样的计算效率被大大降低了。

Another simple synthetic proof of finiteness of areas of asymptotic triangles in non-Euclidean geometry is given.

给出双曲非欧几何中极限三角形面积有限性的另外一种简单证明。

Based on stochastic finite element theory and first order second moment approach, the structural system dynamic reliability analysis methods are studied.

最后开发出适用于大型结构系统极限强度与静强度可靠性分析的程序系统，并由实际工程算例验证了算法的可行性与程序的可靠性。

By applying Bendixson-Dulac theroem, we show that the system admits no limit cycle in the first quadrant, thus the global stability of the interior equilibrium is followed.

首先通过运用Bendixson-Dulac定理证明了系统在第一象限没有极限环，从而证明了正平衡点的全局稳定性。

Diffusion problem of a predator-prey model with Holling typeⅡfunctional capturing function is studied. Stability condition is obtained when diffusion is absent, and the effect on stability of positive equilibrium is studied when diffusion is present. In the end, the problem of existence of limit cycle is proved in the first quadrant when diffusion is absent.

针对一类具有HollingⅡ型功能捕获函数的捕食－食饵模型的扩散问题进行了研究，得到了无扩散时正平衡点的稳定条件，以及扩散存在时对正平衡点稳定性产生的影响，最后证明了无扩散时系统在第一象限存在极限环的问题。

While spans lengths have increased nearly fivefold during the course of this century, they may have reached their physical limits with today's materials.

虽然已经增加了近5倍长度的跨世纪的过程中，他们已经达到了他们的物理极限与今天的材料。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐