| 释义 |
- Science and technology Device Optics Signal processing Computing Mathematics
- Arts and entertainment
- Other uses
- See also
{{selfref|For Wikipedia's edit/abuse filter, see AbuseFilter and Edit filter}}{{Wiktionary|Filter|filter|filtering|filters}}Filter, filtering or filters may refer to: {{TOC right}}Science and technologyDevice- Filter (chemistry), a device which separates solids from fluids (liquids or gases) by adding a medium through which only the fluid can pass
- Filter (aquarium), critical components of both freshwater and marine aquaria
- Filter paper, a semi-permeable paper barrier placed perpendicular to a liquid or air flow. It is used to separate fine solids from liquids or air
- Air filter, a device composed of fibrous materials which removes solid particulates such as dust, pollen, mold, and bacteria from the air
- Oil filter, a filter to remove contaminants from engine oil, transmission oil, lubricating oil, or hydraulic oil
- Pneumatic filter, a device which removes contaminants from a compressed air stream
- Water filter, removes impurities from water by means of a fine physical barrier, a chemical process or a biological process
- Cigarette filter, a part of a cigarette intended to filter the smoke inhaled by a smoker
- Fuel filter, found in most internal combustion engines
- Filtration (wine)
- Sieve or macroscopic filter, a device for separating wanted elements from unwanted material
Optics- Optical filter, selectively transmits light of different wavelengths
- Interference filter, reflects one or more spectral bands or lines and transmits others, while maintaining a nearly zero coefficient of absorption for all wavelengths of interest
- Dichroic filter, a very accurate color filter used to selectively pass light of a small range of colors while reflecting other colors
- Hydrogen-alpha filter, an optical filter that transmits a narrow bandwidth of light centred on the H-alpha wavelength
- Photographic filter, a camera accessory consisting of an optical filter that can be inserted in the optical path
- Infrared cut-off filter, designed to reflect or block mid-infrared wavelengths while passing visible light
- Chelsea filter, a dichromatic optical filter used for identifying coloured stones
- Astronomical filter, a telescope accessory used to enhance the details of celestial objects
Signal processing- Filter (signal processing)
- Electronic filter, an electronic circuit which processes signals, for example to remove unwanted frequency components
- Digital filter, a system that performs mathematical operations to reduce or enhance certain aspects of a signal
- Analogue filter, a basic building block of signal processing much used in electronics
Computing- Filter (higher-order function), in functional programming
- Filter (software), a computer program to process a data stream
- Filter (Unix), a program that gets most of its data from its standard input (the main input stream) and writes its main results to its standard output (the main output stream)
- Filter (video), a software component that performs some operation on a multimedia stream
- Email filtering, the processing of email to organize it according to specified criteria
- Content-control software also known as an Internet filter
- Wordfilter, a script typically used on Internet forums or chat rooms
- Berkeley Packet Filter, filter expression used in the qualification of network data
- DSL filter, a low-pass filter installed between analog devices and a telephone line
- Helicon Filter, a raster graphics editor
- Filter (large eddy simulation), a mathematical operation intended to remove a range of small scales from the solution to the Navier-Stokes equations
- Kalman filter, an approximating algorithm in optimal control applications and problems
Mathematics- Filtration (mathematics), an indexed set of subobjects of a given algebraic structure S.
- Filter (mathematics), a special subset of a partially ordered set
- Filtering problem (stochastic processes), a mathematical model for a number of filtering problems in signal processing and the like
Arts and entertainment- Filter (TV series), a show on the G4 channel
- Filter (magazine), an off-beat indie music magazine
- Filter Theatre, a British theatre company
- The Filter, a digital content services company based in England
- Filter (band), an American rock band
- "Filter", a song from the album Bend by 8stops7
Other uses- Category-based filtering of perception, according to (objectivist interpretations of), Kant; See Category
- Affective filter, an impediment to learning or acquisition caused by negative emotional ("affective") responses to one's environment
- Lane splitting, a practice that cyclists use to pass slow or stopped congested traffic
See also- Filter coffee, a method for preparing coffee
- Filter feeder, an animal that strains food particles from water
- Philtre (disambiguation)
- Lifter (signal processing)
- Separation process
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