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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.

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。

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

Achieve a numerical optimization function of the genetic algorithm source code, binary coding achieved, There are detaile...

实现一个函数的数值优化的遗传算法源代码，采用二进制编码实现，里面有详细的说明，非常适合初学者！

Achieve a numerical optimization function of the genetic algorithm source code, binary coding achieved, There are detailed explanations, very suitable for beginners!

实现一个函数的数值优化的遗传算法源代码，采用二进制编码实现，里面有详细的说明，非常适合初学者！

By encapsulating high-level module in COM components, binary reusability and development language independence can be achieved.

使用COM组件的形式封装底层组件，可以实现二进制组件的复用的开发语言无关性。

The algorithm was achieved in the research of IA-64-to-Alpha binary translation.

在IA-64至Alpha的二进制翻译课题中，对该算法进行了工程实现。

Once this has been achieved it becomes a legal binding contract of sale.

一旦取得这样的成绩，这是一个法律约束力的销售合同。

Our data support the notion that human follicle development can be achieved in vitro in a bio-engineered culture system.

结论我们的数据表明，人类卵泡在体外生物工程培养体系中是可以发育的，但仍需要更多的研究进一步揭示体外培养卵泡是否获得充分大小的卵母细胞，而且卵母细胞是否有能力恢复减数分裂和受精。

The biostratigraphy of this paper is mainly achieved at these two kinds of fossils. The abundance and the diversity of plant fossils are very different across the TPTB stratigraphic set in western Guizhou and eastern Yunnan.

植物化石方面，在研究区两剖面上的界线层组上、下，植物化石的丰度和分异度均存在极大的差异，晚二叠世植物大化石的属种多，化石含量也十分丰富，早三叠世属种单调（或无完整的植物大化石出现），化石含量也极少。

BIP is now a well-established project, but it has not necessarily achieved all its development goals.

BIP现在是一个源远流长的项目，但是 it不一定达到了所有它的发展目标。

It's bell can reach over a meter in diameter.

它的身体最大可以达到直径1米多。

Now they are overdue and I shall have to pay a fine.

现在他们过期了，我不得不付罚款。