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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 first is how to determine boundary curve of surface in triangular domain and after deducing, simultaneous equations is proposed in the dissertation. The second is how to determine the coupling parameter. The third is present simultaneous equations in order to obtain G1 continuous considering the continuity between two triangular patches and the fitness rules.

具体的工作体现在三个方面：一是对拟合条件下的三角域曲面边界线的确定，本文经过推演给出了求解方程组；二是对耦合参数的确定；三是在考虑相邻两片三角域曲面连续性的同时将拟合的规则纳入，给出了求解方程组以达到G 1连续。

That how to deal with the challenges of cultural hegemony and how to understand and handle Chinas cultural security issues correctly is particularly essential to China in the period of transition. Former national security adviser of the United States Brzezinski said that the history of the development on communication is the process of media globalization and seeking the establishment of cultural hegemony in the Unites States.

在全球化的今天，从某种意义上说，大众媒介已经成为美国等发达国家威胁他国文化安全的最重要的手段，从传媒人的视角来看我国的大众媒介在维护国家文化安全方面具有不可推卸的文化责任，尝试提出当前大众传媒在提升我国文化安全方面的重要策略。

More than Nicolaus Steno's famous Prodromus (1669), Burnet can be said to have set the agenda for the next decades: how to reconstruct the earth's past and how to combine natural evidence with human records.

除了尼古劳斯·斯泰诺的名著《固体中包含固体论稿》（1669），伯内特可以说确定了随后几十年的任务：怎样重建地史和怎样将自然表征与人的记录结合起来。

The next reviewed book to use is "How to play the piano despite years of lessons" by Cannel and Marx, which is not a book about technique; instead, it teaches how to play jazz, popular songs, or from fake books.

另一本做了书评的可用来练习的书，是坎耐尔和马克思的《多年钢琴课学习后如何演奏钢琴》，这本书不是谈演奏技巧的，而是教你如何演奏爵士乐，流行歌曲，或者按照抓谱集演奏的。

At first, I was sent to working with the Protocol Nurse---Mary Caroll, to watch how she handling these Phase I patients; how to coordinate with Lab, PI and nursing staffs.

更重要的是，本人协助苏五洲主任已筹划一个PI-initiated临床试验：以「上皮生长因子基因突变个制化之肺腺癌第二线治疗疗效」之研究。

A frequentely faced problem in many meetings, especially the meeting with more than 10 lectures in 1 day, is that overtime always occurs. As a result, the following lecturers have to shorten their time, which conduces a terrible drop of lecturing quality. Because under a urgency many verdant lecturers would resultingly stutter, have no idea that how to catch the point, which silde could be ignored, and what should be given out directly. The funniest experience in my memory, once we all shouted a colleague to speed up. As a result, this poor guy became all of a sweat, tetanic and confused, having no alternative but reading the words of PPT one by one, no matter how we urge him. Finally, we all had to keep silence, waiting for him adjusting breath smooth and completing his PPT reading slowly.

我在很多会议上遇到这样的情况，尤其是那种1天排满了10多个发言的大会，永远会超时，结果后面的发言者不得不被迫缩短时间，结果导致发言质量大大下降，原因在于催促之下很多没有经验的发言者因此结结巴巴，不知该如何把握重点，应该跳过哪些slide直接到什么位置；最好笑的是一次，我们在下面大声要他加快速度，结果这位可怜的同事，当时大汗淋漓、身体僵硬、思维混乱，干脆一个字一个字念PPT上的文字——无论我们怎样催促，我们不得不全场安静，等他逐渐调整呼吸，慢慢将PPT读完。

A frequentely faced problem in many meetings, especially the meeting with more than 10 lectures in 1 day, is that overtime always occurs. As a result, the following lecturers have to shorten their time, which conduces a terrible drop of lecturing quality. Because under a urgency many verdant lecturers would resultingly stutter, have no idea that how to catch the point, which silde could be ignored, and what should be given out directly. The funniest experience in my memory, once we all shouted a colleague to speed up. As a result, this poor guy became all of a sweat, tetanic and confused, having no alternative but reading the words of PPT one by one, no matter how we urge him. Finally, we all had to keep silence, waiting for him adjusting breath smooth and completing his PPT reading slowly.8 v5 c: ' a, \/ D: D

我在很多会议上遇到这样的情况，尤其是那种1天排满了10多个发言的大会，永远会超时，结果后面的发言者不得不被迫缩短时间，结果导致发言质量大大下降，原因在于催促之下很多没有经验的发言者因此结结巴巴，不知该如何把握重点，应该跳过哪些slide直接到什么位置；最好笑的是一次，我们在下面大声要他加快速度，结果这位可怜的同事，当时大汗淋漓、身体僵硬、思维混乱，干脆一个字一个字念PPT上的文字——无论我们怎样催促，我们不得不全场安静，等他逐渐调整呼吸，慢慢将PPT读完。

Now what lies in front of CHAC is how to make good sales strategies, and how to increase the sales percentage in the market, therefore improving its own competitiveness in order to achieve the long time-scale development goal.

在这种形势下，如何制定发展战略，率先抢占市场份额，发挥竞争优势，提高自己的核心竞争力，实现企业的可持续发展，是华星汽贸目前面临的重要课题。

Then how to use limited Markov chain and Bayes' rule in DHCM to dynamically describe the evolution of enterprises' cooperative relationships, specifically evolution of cooperative relationships building and cooperative relationships selecting is analyzed. Finally, how to optimize related action sets in the model during the evolution is discussed.

模型首先对企业整体协作关系进行了一般性描述和形式化描述，之后利用有限马尔可夫链和贝叶斯法则对在面临新的市场需求的情况下企业之间是否建立协作关系以及建立何种协作关系进行了动态描述，并分析了在新的市场需求下，企业实体将如何选择最优的行动集。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。