نتایج جستجو برای: air filter testing unit

تعداد نتایج: 1019069  

ژورنال: سلامت و محیط زیست 2011
ادیب زاده, امیر, مسعودی نژاد, محمدرضا, چاوشی, بهنام,

Bachgrounds and Objectives: Oil, gas and petrochemical are known as important sources of air pollutants and emission of green house gases. About 99 percent of sulfur dioxide in the air is produced from human resources. Although several samples have been taken from industries and refineries' output by environmental experts and private companies, but accurate assessment is not available based on ...

Journal: :Journal of environmental monitoring : JEM 2006
Anoop Agrawal John Cronin Juan Tonazzi T Mark McCleskey Deborah S Ehler Edel M Minogue Gary Whitney Christopher Brink Anthony K Burrell Benjamin Warner Michael J Goldcamp Paul C Schlecht Prerna Sonthalia Kevin Ashley

Beryllium is widely used in industry for its unique properties; however, occupational exposure to beryllium particles can cause potentially fatal disease. Consequently, exposure limits for beryllium particles in air and action levels on surfaces have been established to reduce exposure risks for workers. Field-portable monitoring methods for beryllium are desired in order to facilitate on-site ...

2009
Yuji YAMADA Aklra KOIZUMI A. KOIZUMI

A new simplified method for particle size estimation of radioactive aerosols was proposed for air monitoring. It does not need any new instruments but a traditional aerosol sampling device with a multistage filter system. The method is based on the particle size dependency of penetration for air filter. Decontamination factor data measured in each filter stage is inversed to a size distribution...

Journal: :Lab on a chip 2012
Kwang Hyo Chung Yo Han Choi Jong-Heon Yang Chan Woo Park Wan-Joong Kim Chil Seong Ah Gun Yong Sung

We present a novel blood filter unit that is designed to separate blood plasma from whole blood by simple magnetic actuation. A non-diluted blood sample is dropped into the filter unit and magnetic attraction is applied to squeeze out only blood plasma while blood particles are filtered by membranes stacked in the filter unit. The new filter device yields good filtering performance with nearly ...

2010
Wimol San-Um

This paper presents a pulse response-based builtin self test technique and implementation for the testing of analog integrated circuits in mixed-signal systems. This BIST technique employs two narrow width pulses as input stimuli, and monitors two voltage samples on pulse response waveform for fault detection through allowable tolerances. The BIST system implementation realizes a programmable d...

2008
Chingiz Hajiyev

Operative methods of testing the covariance matrix of the innovation sequence of the Kalman filter are proposed. The quadratic form of the random Wishart matrix is used in this process as monitoring statistic, and the testing problem is reduced to the classical problem of minimization of a quadratic form on the unit sphere. As a result, two algorithms for testing the covariance matrix of the in...

2016
Seung-Whee Rhee Hyeong-Jin Choi

Compact Fluorescent Lamps (CFLs) are composed of glass, plastic, non-ferrous metal, ferrous metal, paper, plastic, rubber, and so on. In order to separate glass and plastic among CFLs components, air separation unit is applied using the difference in specific gravity. Since specific gravities of glass, plastic, non-ferrous metals, rubber, etc. were widely spread, it can be separated by the diff...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده برق و کامپیوتر 1392

آلتراسوند یکی از روش های تصویربرداری است که هیج ضرری برای بدن ندارد، بنابرین نسبت به سایر دستگاه های پزشکی از محبوبیت و کاربرد بیشتری برخوردار است. طراحی بورد front-end یکی از چالشهای بزرگ در طراحی دستگاه سونوگرافی است که در آن سیگنالهای مدوله شده از بدن با دامنه بسیار کم باز می گردند که می توانند در رنج فرکانسی 2 تا 12 مگاهرتز کار کنند. تکنولوژی روز سعی در کوچک کردن مدارهای الکترونیکی و کمینه ...

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