查询词典 at last

To solve the difficult problems mentioned above and to conquer the shortcomings of existing technologies,we considered it necessary to purposely design a high-performance classification model and corresponding algorithm at first;and then to study its application methods;at last,to build up a practical on-board PDS antitype system based on the proposed model and algorithm.

针对行人检测系统与关键技术存在的上述难点问题，我们认为有必要研究出针对性的高效分类模型与算法，设计面向应用的实现技术，最终搭建一个具有实用价值的行人检测原型系统。

At last, they will lost themselves in the war at a cost of blood and lives.

最后，他们将在战争中失去了在血和生命为代价的自己。

At first I thought it is very difficult ,but I worked it out at last.

起初我认为它很难，最后我还是做出来了。

He didn't agree with me at the beginning, but i persuaded him at last.

他开始不同意我的意见，但最终我还是说服了他。

At last, the thesis comes up with some practical suggestion at the standpoint of strategy execution.

最后，从市场开拓、产品研发、人力资源管理三个角度阐述如何实现战略目标。

At last, the atomic elastic model is firstly applied to explain the reason why FBG loses its grating characteristic at high temperature.

通过分析研究，提出了用原子弹性模型解释FBG在高温状态下失效原因的新观点。

At last,we apply Tikhonov reg-ularization method with closed operators to solvc nonlinear ill-posed problems,undercertain conditions,we obtain optimal convergence rates of regularized solutions.At thesame time,we also discuss the case when the"attainability"condition is not satisfied.

最后我们应用带闭算子的Tikhonov正则化方法研究非线性的不适定问题，在一定的条件下得到了最优的收敛率，并讨论了当"可达性"条件不满足的情况下的正则化。

At last they arrived at a humble cottage,where the old couple Baucis and her husband Philemon lived.

他们敲了许多人家的门，希望能歇歇脚，讨点食物，却一次又一次地被拒之门外。

along with the development of digital technology,digital filters are widely used in many fields,this paper introduces how to design a iir digital notch filters in matlab environment.the design of digital notch filters can be achieved through three steps:firstly,the design of analog lowpass filter; secondly,it is analog lowpass to analog band stop filter conversion;at last,using the bilinear transformation make the analog notch filters change into digital notch filters.the paper also introduces how to design the transfer function of the digital notch filters using all the zeros and farthest points at the same time,it also introduces the program of the digital notch filters under butterworth analog lowpass prototype.

摘 要：随着数字技术的发展，数字滤波器在许多领域得到广泛的应用。研究一种在matlab语言环境下设计iir数字陷波滤波器的方法，在数字陷波滤波器设计过程中，先进行模拟低通滤波器的设计，然后进行模拟低通/模拟带阻滤波器转换，最后采用双线性变化法将模拟陷波滤波器转化成数字陷波滤波器。提出一种用所有零点和极点来表达数字陷波器传递函数的方法，同时给出以巴特沃斯模拟低通为原型设计数字陷波滤波器的程序。关键词：无限冲激响应；巴特沃斯滤波器；数字陷波滤波器；matlab；双线性变换

The birefraction filter is also designed to get satisfying output-parameters. At last, the Ti:sapphire laser with flat-flat resonant cavity is pumped with the pumping source at 532nm. The pumping source is got from the frequency doubling of Nd:YAG laser.

对调谐元双折射滤光片进行了设计，采用厚度比为1：2：10的三片组合型双折射滤光片，最薄晶片厚度d 1 = 0.45mm，光轴与滤光片法线方向呈90度角，以使系统的输出参数达到预期的要求。

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。