Contraction vs Compression - What's the difference?
As nouns the difference between contraction and compression
is that contraction
is a reversible reduction in size while compression
is an increase in density; the act of compressing, or the state of being compressed; compaction.
A reversible reduction in size.
(economics) A period of economic decline or negative growth.
(biology) A shortening of a muscle when it is used.
(medicine) A strong and often painful shortening of the uterine muscles prior to or during childbirth.
(linguistics) A process whereby one or more sounds of a free morpheme (a word) are lost or reduced, such that it becomes a bound morpheme (a clitic) that attaches phonologically to an adjacent word.
- The country's economic contraction was caused by high oil prices.
(English orthography) A word with omitted letters replaced by an apostrophe, usually resulting from the above process.
- In English ''didn't'', ''that's'', and ''wanna'', the endings ''-n't'', ''-'s'', and ''-a'' arose by contraction .
(medicine) Contracting a disease.
- "Don't" is a contraction of "do not."
(phonetics) Syncope, the loss of sounds from within a word.
The acquisition of something, generally negative.
- The contraction of AIDS from toilet seats is extremely rare.
(medicine) A distinct stage of wound healing, wherein the wound edges are gradually pulled together.
- Our contraction of debt in this quarter has reduced our ability to attract investors.
an increase in density; the act of compressing, or the state of being compressed; compaction
the cycle of an internal combustion engine during which the fuel and air mixture is compressed
(computing) the process by which data is compressed
, year = 2011
, author = Marcelo A. Montemurro & Damián H. Zanette
, title = Universal Entropy of Word Ordering Across Linguistic Families
, site = PLoS ONE
, url = http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0019875
, accessdate = 2012-09-26}}
(music) the electronic process by which any sound's gain is automatically controlled
(astronomy) the deviation of a heavenly body from a spherical form
- Due to the presence of long-range correlations in language ,  it is not possible to compute accurate measures of the entropy by estimating block probabilities directly. More efficient nonparametric methods that work even in the presence of long-range correlations are based on the property that the entropy of a sequence is a lower bound to any lossless compressed version of it . Thus, in principle, it is possible to estimate the entropy of a sequence by finding its length after being compressed by an optimal algorithm. In our analysis, we used an efficient entropy estimator derived from the Lempel-Ziv compression algorithm that converges to the entropy , , , and shows a robust performance when applied to correlated sequences  (see Materials and Methods).
* compression ratio
* compression wave
* data compression