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Density — This article is about mass density. For other uses, see Density (disambiguation). The mass density or density of a material is defined as its mass per unit volume. The symbol most often used for density is ρ (the Greek letter rho). In some cases… … Wikipedia
test — 1. To prove; to try a substance; to determine the chemical nature of a substance by means of reagents. 2. A method of examination, as to determine the presence or absence of a definite disease or of some substance in any of the fluids, tissues,… … Medical dictionary
Test probe — Typical passive oscilloscope probe being used for testing an integrated circuit. A test probe (test lead, test prod, or scope probe) is a physical device used to connect electronic test equipment to the device under test (DUT). They range from… … Wikipedia
test — I (New American Roget s College Thesaurus) n. examination; trial, essay; criterion; experiment. II (Roget s IV) n. 1. [A check for adequacy] Syn. inspection, analysis, countdown, probing, inquiry, inquest, elimination, proving ground(s), training … English dictionary for students
Density matrix renormalization group — The density matrix renormalization group (DMRG) is a numerical variational technique devised to obtain the low energy physics of quantum many body systems with high accuracy. It was invented in 1992 by Steven R. White and it is nowadays the most… … Wikipedia
density gradient centrifugation — ultracentrifugation in a liquid, such as cesium chloride solution, the density of which increases along the lines of centrifugal force, the substances under test or preparation seeking their level of density … Medical dictionary
Test recording currents — An ISO term. (7811 2) Two test recording currents (square wave) measured at 350 % and 500 % of the reference current. ISO Identification Cards term. The recording current between 200 % and 220 % of the current which is required to produce… … International financial encyclopaedia
Proctor compaction test — The Proctor compaction test and the related modified Proctor compaction test, named for engineer Ralph R. Proctor (1933), are tests to determine the maximum practically achievable density of soils and aggregates, and are frequently used in… … Wikipedia
Lexical density — In computational linguistics, lexical density constitutes the estimated measure of content per functional (grammatical) and lexical units (lexemes) in total. Specifically, this is a coefficient of the word type to token ratio of a text. The main… … Wikipedia
Bit Error Rate Test — BERT or Bit Error Rate Test is a testing method for digital communication circuits that uses predetermined stress patterns comprising of a sequence of logical ones and zeros generated by a pseudorandom binary sequence. A BERT Tester typically… … Wikipedia
Silt Density Index — The silt density index is a measure for the fouling capacity of water in reverse osmosis systems. SDI values below 5 result in low fouling rates. The Silt Density Index (SDI) test is used to determine the fouling potential of waterfeeding a… … Wikipedia
