查询词典 filters

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

Filters judge whether a gene should be selected based on a ranking criterion; therefore, they are very fast in computation but might select highly correlated genes that give rise to redundancy.

Filters利用一个排序准则来判断一个基因是否被选取；因此，这种方法在计算上非常快速，但可能选到高度相关的基因而造成冗赘。

This paper introduces and investigates the filter theory of pseudo NM algebra. The notions of filters, generated filters, normal filters and prime filters etc. are defined. Their basic properties are investigated, with the structures of generated filters obtained. We show that prime filters and irreducible filters are equivalent, and that maximum filters must be prime filters. The prime filter theorem of pseudo NM algebra and its some corollaries are established.

引入了伪NM代数的滤子理论，定义了滤子、生成滤子、正规滤子和素滤子等概念，研究了它们的特征性质，给出了生成滤子的结构，证明了在伪NM代数中素滤子与不可约滤子等价以及极大滤子必是素滤子，建立了伪NM代数的素滤子定理及其推论。

The concepts of MP-filters and Boolean MP-filters in NML algebras are introduced in this paper, and by using MP-filters, the structure of NML algebras are established: If F is the Boolean filters, then M/~ is the Boolean algebras, i. e. the quotient algebra of NML algebras is obtained.

讨论了NML代数的性质，并且在NML代数上引入MP-滤子与MP-理想以及布尔MP-滤子的概念，并利用布尔MP-滤子建立了NML代数的结构：若F是布尔滤子，则M/~是布尔代数，即NML代数的商代数是布尔代数。

The second stage is a transformer which yield a frequency-domain spectral representation: Numbers of Selectively Synchronized Filters(NSSF:Numbers of Selectively Synchronized Filters).

第二部分是一个转换器，它产生一种频域表示：选择性同步滤波器数(Numbers of Se-lectively Synchronized Filters，NSSF)。

This utility model disclosed a dust removal equipment, environmental protection, their characteristics is that, including filters, dust collection equipment and negative pressure ventilation machines, referred to the vertical filter settings are arranged in descending sequence multi-aperture filter, its Set large aperture filters connected at one end of inlet pipe, set a small aperture at one end of filters connected through the vacuum exhaust fan out of the wind pipe, dust collection equipment installed in the bottom of each layer filters.

本实用新型公开了一种环保除尘设备，其特征在于，包括过滤器、集尘装置和负压抽风机，所述过滤器内垂直设置有多层孔径依次从大到小排列的过滤网，其设置有大孔径过滤网的一端连接进风管，设置有小孔径过滤网的一端通过负压抽风机连接出风管，集尘装置设置在每层过滤网的下端。

Software Description: AmphiSoft Plug-in Filters includes 10 Photoshop compatible plug-in filters for special effects like3D-like metallic looks, motion blur, Xylograph and others.

AmphiSoft Plug-in Filters 包括10款用于实现诸如三维立体金属外观，动作模糊，木板印刷等特效的 Photoshop 可兼容滤镜插件。

Items such as arterial filters, anesthesia filters, blood filters, IV catheters, dialysis tubes, pipettes, cardiometry reservoirs, blood/gas filters, face masks and IV spike/filters can all be made using ultrasonic welding.

项目例如动脉过滤器、麻醉过滤器、血液过滤器、IV导尿管、透析管、吸移管、人造心脏、血液或气体过滤器、面罩和IV钉或者过滤器可能所有使用超音波熔接被使用。

Our factory was built in 2002, covers an area of more than 3000 square meters, the production of ventilation, filtration, separation, purification products, mainly include: air filters, smoke filters, air-conditioning filters, water filters, oil and gas separator, screen demister, wire mesh packing, stainless steel filters, liquid filters, aluminum filters platinum, punching board network, stretching board network, the product is widely used in electronics, telecommunications, finance, biotechnology, medical, pharmaceutical , food, chemical industry, machinery manufacturing and other industries.

我厂建于2002年，占地3000多平方米，生产通风、过滤、分离、净化系列产品，主要有：风口过滤器、油烟过滤器、空调过滤器、水过滤器、油气分离器、丝网除沫器、金属丝网填料、不锈钢过滤网、气液过滤网、铝铂过滤网、冲孔板网、拉伸板网等，产品广泛应用于电子、电信、金融、生物、医疗、制药、食品、化工、机械制造等行业。

VAF including the United States, Germany VERDER Group, the United States PER Filters, the United States DIL SKIMMERS Company.

其中包括美国VAF公司，德国VERDER集团，美国PER Filters公司，美国DIL SKIMMERS公司等。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。