dust filter - определение. Что такое dust filter
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Что (кто) такое dust filter - определение

DEVICE COMPOSED OF FIBROUS MATERIALS WHICH REMOVES SOLID PARTICULATES FROM THE AIR
Filter (air); Air cleaner; Air filtration; Air filters; Universal air filter; Cabin air filter; Dust filter; Air Filters
  • Diagram of a [[HEPA]] (high-efficiency particulate air) filter
Найдено результатов: 755
Air filter         
A particulate air filter is a device composed of fibrous, or porous materials which removes solid particulates such as dust, pollen, mold, and bacteria from the air. Filters containing an adsorbent or catalyst such as charcoal (carbon) may also remove odors and gaseous pollutants such as volatile organic compounds or ozone.
air filter         
¦ noun a device for filtering particles from the air passing into an internal-combustion engine.
Photographic filter         
  • The 80A filter, mainly used to correct for the excessive redness of [[tungsten]] lighting, can also be used to oversaturate scenes that already have blue. The photo on the left was shot with a polarizer, while the one on the right was shot with a polarizer and an 80A filter.
  • Effects of using a polarizer and a red filter in black-and-white photography
  • An extreme case: a Nikon D700 with a smashed filter which may have saved the Nikkor lens beneath. Usually, all that can reasonably be expected is protection from scratches, nicks and airborne contaminants.
  • Polarizing filter, Atlantic Ocean 1989
  • The ''LOMO effect'' imitates photos made with a low-cost Russian camera brand, named "LOMO". It is approximated by saturated central colors, blurred periphery, and darkened corners and edges ([[vignetting]]).}} effect.
CAMERA ACCESSORY CONSISTING OF AN OPTICAL FILTER
Daylight filter; Filter (photography); Lens filter; Filter ring; Filter mount; Filter thread; Cross screen filter; Photographic filters; Red Black and White filter; Camera filter; Series filter
In photography and cinematography, a filter is a camera accessory consisting of an optical filter that can be inserted into the optical path. The filter can be of a square or oblong shape and mounted in a holder accessory, or, more commonly, a glass or plastic disk in a metal or plastic ring frame, which can be screwed into the front of or clipped onto the camera lens.
cosmic dust         
  • newspaper=ESA/Hubble Picture of the Week}}</ref>
  • Cosmic dust of the [[Andromeda Galaxy]] as revealed in infrared light by the [[Spitzer Space Telescope]].
  • work=ESO Press Release}}</ref>
  • A dusty trail from the early Solar System to carbonaceous dust today.
  • Cosmic dust of the [[Horsehead Nebula]] as revealed by the [[Hubble Space Telescope]].
  • Major elements of 200 stratospheric interplanetary dust particles.
  • Smooth chondrite interplanetary dust particle.
  • access-date=4 April 2016}}</ref>
DUST FLOATING IN SPACE
Interstellar dust; Space dust; Interstellar Dust; Dark Nebulae; Astrophysical dust; Galactic dust; Dust filament; Cosmic Dust; Interstellar grains; Interplanetary grains; Extraterrestrial dust; Dust from space
¦ noun small particles of matter distributed throughout space.
Elliptic filter         
  • The frequency response of a fourth-order elliptic low-pass filter with '''ε'''&nbsp;=&nbsp;0.5 and '''ξ'''&nbsp;=&nbsp;1.05. Also shown are the minimum gain in the passband and the maximum gain in the stopband, and the transition region between normalized frequency 1 and '''ξ'''
  • A closeup of the transition region of the above plot.
  • Log of the absolute value of the gain of an 8th order elliptic filter in [[complex frequency space]] (s = σ + jω) with ε = 0.5, ξ = 1.05 and ω<sub>0</sub> = 1. The white spots are poles and the black spots are zeroes. There are a total of 16 poles and 8 double zeroes. What appears to be a single pole and zero near the transition region is actually four poles and two double zeroes as shown in the expanded view below. In this image, black corresponds to a gain of 0.0001 or less and white corresponds to a gain of 10 or more.
  • An expanded view in the transition region of the above image, resolving the four poles and two double zeroes.
  • upright=3.6
SIGNAL PROCESSING FILTER
Cauer filter; Elliptical filter; Equiripple filter; Eliptic filter
An elliptic filter (also known as a Cauer filter, named after Wilhelm Cauer, or as a Zolotarev filter, after Yegor Zolotarev) is a signal processing filter with equalized ripple (equiripple) behavior in both the passband and the stopband. The amount of ripple in each band is independently adjustable, and no other filter of equal order can have a faster transition in gain between the passband and the stopband, for the given values of ripple (whether the ripple is equalized or not).
Electronic filter         
  • A low-pass electronic filter realised by an [[RC circuit]]
  • Constant k filter response with 5 elements
  • center
  • High-pass T filter
  • Low-pass π filter
  • RL filter frequency response
  • Zobel network (constant R) filter, 5 sections
ELECTRONIC CIRCUIT THAT REMOVES UNWANTED COMPONENTS FROM THE SIGNAL, OR ENHANCES WANTED ONES, OR BOTH
Electronic filters; Filter (circuits); Pi filter; Pi Filter; Frequency filter; BAW filter
Electronic filters are a type of signal processing filter in the form of electrical circuits. This article covers those filters consisting of lumped electronic components, as opposed to distributed-element filters.
Optical filter         
  • Coloured and [[neutral-density filter]]s
DEVICE THAT SELECTIVELY TRANSMITS LIGHT OF CERTAIN WAVELENGTHS
Optic filter; Wedge filter; Glass filter; Optical Filters; Optical band-pass filter; Optical bandpass filter; Filter (optics); Light filter
An optical filter is a device that selectively transmits light of different wavelengths, usually implemented as a glass plane or plastic device in the optical path, which are either dyed in the bulk or have interference coatings. The optical properties of filters are completely described by their frequency response, which specifies how the magnitude and phase of each frequency component of an incoming signal is modified by the filter.
Cosmic dust         
  • newspaper=ESA/Hubble Picture of the Week}}</ref>
  • Cosmic dust of the [[Andromeda Galaxy]] as revealed in infrared light by the [[Spitzer Space Telescope]].
  • work=ESO Press Release}}</ref>
  • A dusty trail from the early Solar System to carbonaceous dust today.
  • Cosmic dust of the [[Horsehead Nebula]] as revealed by the [[Hubble Space Telescope]].
  • Major elements of 200 stratospheric interplanetary dust particles.
  • Smooth chondrite interplanetary dust particle.
  • access-date=4 April 2016}}</ref>
DUST FLOATING IN SPACE
Interstellar dust; Space dust; Interstellar Dust; Dark Nebulae; Astrophysical dust; Galactic dust; Dust filament; Cosmic Dust; Interstellar grains; Interplanetary grains; Extraterrestrial dust; Dust from space
Cosmic dust, also called extraterrestrial dust or space dust, is dust which exists in outer space, or has fallen on Earth. Most cosmic dust particles measure between a few molecules and 0.
gold dust         
WIKIMEDIA DISAMBIGUATION PAGE
Gold dust; Gold-dust; Golddust; Gold Dust (disambiguation); Gold Dust (song); Gold Dust (album)
¦ noun fine particles of gold.
Phrases
be like gold dust Brit. be very rare and valuable.
gold dust         
WIKIMEDIA DISAMBIGUATION PAGE
Gold dust; Gold-dust; Golddust; Gold Dust (disambiguation); Gold Dust (song); Gold Dust (album)
1.
Gold dust is gold in the form of a fine powder.
N-UNCOUNT
2.
If you say that a type of thing is like gold dust or is gold dust, you mean that it is very difficult to obtain, usually because everyone wants it. (BRIT)
Tickets were like gold dust.
N-UNCOUNT

Википедия

Air filter

A particulate air filter is a device composed of fibrous, or porous materials which removes solid particulates such as dust, pollen, mold, and bacteria from the air. Filters containing an adsorbent or catalyst such as charcoal (carbon) may also remove odors and gaseous pollutants such as volatile organic compounds or ozone. Air filters are used in applications where air quality is important, notably in building ventilation systems and in engines.

Some buildings, as well as aircraft and other human-made environments (e.g., satellites, and Space Shuttles) use foam, pleated paper, or spun fiberglass filter elements. Another method, air ionizers, use fibers or elements with a static electric charge, which attract dust particles. The air intakes of internal combustion engines and air compressors tend to use either paper, foam, or cotton filters. Oil bath filters have fallen out of favour aside from niche uses. The technology of air intake filters of gas turbines has improved significantly in recent years, due to improvements in the aerodynamics and fluid dynamics of the air-compressor part of the gas turbines.