pre-filter
First-stage strainer
A pre-filter is a preliminary filter that removes larger particles or contaminants before material passes through a finer main filter.
The term appears in air purification, water treatment, and photography, where it describes an initial stage of filtration or processing: The pre-filter catches dust and hair before air reaches the HEPA filter.
As a verb, to pre-filter is to apply such preliminary filtering.
Sealed container for supplies
- mesh screenPorous woven barrier
- strainerPerforated draining vessel
- turbidityCloudiness from suspended particles
- water treatmentCleaning supply for consumption
Selective light-wave filter
- color correctionAdjusting image hues
- diffusionPassive molecular spreading
- contrast controlDisplay setting adjusting tonal separation
- glare reductionDecreasing blinding brightness
Initial data preparation steps
- screeningEvaluative selection process
- validationConfirming truth or accuracy
- noise reductionDecreasing auditory interference
- thresholdPoint of beginning
criteria · indexing · whitelist · blacklist · sorting · batch processing · algorithm · pipeline
Indoor climate management
- ventilationCirculation of fresh air
- particulate matterFine airborne solid fragments
- fiberglassReinforced woven strand composite
- electrostaticOf stationary electrical charges
cleanroom · air purifier · pollen · lint trap · ductwork · airflow
Conditions for consideration
- clinical trialHuman subject research experiment
- enrollmentAct of registering officially
- triageSeverity-based prioritization
- medical historyRecord of past ailments
contraindication · candidate selection · informed consent · recruitment · lab values
cartridge
Sealed container for supplies
- mesh screenPorous woven barrier
- strainerPerforated draining vessel
- turbidityCloudiness from suspended particles
water treatment · reverse osmosis · pool skimmer · backwash · drip system
polarizer
Selective light-wave filter
- color correctionAdjusting image hues
- diffusionPassive molecular spreading
- contrast controlDisplay setting adjusting tonal separation
preprocessing
Initial data preparation steps
- screeningEvaluative selection process
- validationConfirming truth or accuracy
- noise reductionDecreasing auditory interference
threshold · criteria · indexing · whitelist · blacklist · sorting · batch processing · algorithm · pipeline · ETL
HVAC
Indoor climate management
- ventilationCirculation of fresh air
- particulate matterFine airborne solid fragments
- fiberglassReinforced woven strand composite
electrostatic · cleanroom · air purifier · pollen · lint trap · ductwork · airflow
eligibility criteria
Conditions for consideration
- clinical trialHuman subject research experiment
- enrollmentAct of registering officially
- triageSeverity-based prioritization
medical history · contraindication · candidate selection · informed consent · recruitment · lab values
- air filtersHEPA, prefilters
- filtershighpass, mesh screen, tea strainer, sieve, strainer
- air purifier partsfan, activated charcoal, air intake, air outlet, motor
- vacuumsvacuum, vacuum cleaner, upright vacuum, canister vacuum, stick vacuum