source coding theorem
source coding theorem In
communication theory, the statement that the output of any information source having
entropy H units per symbol can be encoded into an alphabet having
N symbols in such a way that the source symbols are represented by codewords having a weighted average length not less than
H/log
N (where the base of the logarithm is consistent with the entropy units). Also, that this limit can be approached arbitrarily closely, for any source, by suitable choice of a
variable-length code and the use of a sufficiently long
extension of the source (see
source coding).
The theorem was first expounded and proved by Claude Elwood Shannon in 1948.
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Ethyl Acetate World Market Outlook 2009.
M2 Presswire; 9/23/2009; 700+ words
; ...September 2009-Research and Markets: Ethyl Acetate World Market Outlook 2009(C...researchandmarkets.com/research/5cca16/ethyl_acetate_worl) has announced the addition of the "Ethyl Acetate World Market Outlook 2009" report...
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ETHYL BREAKS GROUND ON $70 MILLION PETROLEUM ADDITIVES RESEARCH FACILITIES
PR Newswire; 8/27/1992; 700+ words
; ETHYL BREAKS GROUND ON $70 MILLION PETROLEUM ADDITIVES...RICHMOND, Va., Aug. 27 /PRNewswire/ -- Ethyl Corporation (NYSE: EY) launched the construction...The site of the new complex is adjacent to Ethyl's headquarters in Richmond, Va. Bruce...
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Ethyl Corp. Hopes Gas Additive Will Rev Up Stock Price
Newspaper article from: The Washington Post; 6/25/1990; ; 700+ words
; The shares of Ethyl Corp., the Richmond-based chemical...week as investors were betting that a new Ethyl product called HiTec 3000 could turn a...five years. HiTec 3000 is the name that Ethyl has given to a gasoline additive that it...
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Ethyl Acetate: The Updated 2009 World Market Outlook And Future Forecasts.
M2 Presswire; 8/28/2009; 700+ words
; ...28 August 2009-Research and Markets: Ethyl Acetate: The Updated 2009 World Market Outlook...researchandmarkets.com/research/9d3cc0/ethyl_acetate_200) has announced the addition of the "Ethyl Acetate: 2009 World Market Outlook And Forecast...
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Ethyl acetate market.(Organics)
Magazine article from: China Chemical Reporter; 8/26/2008; 700+ words
; Ethyl acetate is an important downstream product...pharmaceuticals and in organic chemical synthesis. As ethyl acetate is a natural compound existing in...In the surface coatings and ink sector, ethyl acetate can replace methyl ethyl ketone and...
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ETHYL SETS SPIN-OFF OF ALBEMARLE
PR Newswire; 2/17/1994; 700+ words
; ...RICHMOND, Va., Feb. 17 /PRNewswire/ -- Ethyl Corporation (NYSE: EY) today announced...Albemarle Corporation, to holders of Ethyl common stock. Albemarle Corporation will...publicly traded, Fortune-500 company. Ethyl shareholders of common stock held of record...
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Ethyl Corporation - Directors Vote to Recommend Holding Company.
Business Wire; 3/5/2004; 700+ words
; ...March 5, 2004 The Board of Directors of Ethyl Corporation (NYSE: EY) have unanimously...company structure. Under this structure, Ethyl would become a wholly owned subsidiary...Corporation. As part of the process, Ethyl has caused to be filed a Registration Statement...
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ETHYL SIGNS DEAL WITH MITSUBISHI KASEI
PR Newswire; 11/23/1992; 689 words
; ...RICHMOND, Va., Nov. 23 ~PRNewswire~ -- Ethyl Corporation (NYSE: EY) announced today...Mitsubishi Kasei Corporation of Tokyo under which Ethyl Japan Corporation, a wholly owned subsidiary of Ethyl, will take over, effective Jan. 1, 1993...
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Ethyl subsidiary to establish new facility in Belgium. (Ethyl S.A.)
PR Newswire; 6/20/1990; 700+ words
; ETHYL SUBSIDIARY TO ESTABLISH NEW FACILITY IN BELGIUM BRUSSELS, Belgium, June 20 /PRNewswire/ -- Ethyl S.A., a wholly owned subsidiary of Ethyl Corporation (NYSE: EY), today announced plans to locate...
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ETHYL CORPORATION ANNOUNCES DISTRIBUTION RATIO FOR FIRST COLONY STOCK
PR Newswire; 6/14/1993; 700+ words
; ...RICHMOND, Va., June 14 /PRNewswire/ -- Ethyl Corporation (NYSE: EY) today announced...July 1, 1993, distribution to holders of Ethyl common stock of the company's remaining...First Colony Corporation (NYSE: FCL). Ethyl said its approximately 80 percent interest...
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Ethyl Group
Encyclopedia entry from: The Gale Encyclopedia of Science
Ethyl Group Ethyl group is the name given to the portion of an organic molecule that is...from ethane by removal of a hydrogen atom ( – CH 2 CH 3 ). An ethyl group can be abbreviated in chemical structures as Et. The ethyl group...
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Ethyl Corporation
Book article from: International Directory of Company Histories
Ethyl Corporation 330 South Fourth Street P.O...Japan, France, England, and Belgium, Ethyl Corporation was a leading manufacturer and...subsidiary, Whitby Pharmaceuticals, Inc., Ethyl was also one of the United States ’...
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ethyl vanillin
Book article from: A Dictionary of Food and Nutrition
ethyl vanillin A synthetic compound, chemically the ethyl analogue of vanillin, the major flavouring principle of vanilla .
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ethyl
Book article from: The Oxford Pocket Dictionary of Current English
eth·yl / ˈe[unvoicedth]əl / • n. [usu. as adj. ] Chem. of or denoting the hydrocarbon radical −C 2 H 5 , derived from ethane and present in many organic compounds: ethyl acetate an ethyl group.
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ethyl carbamate
Book article from: A Dictionary of Food and Nutrition
ethyl carbamate See urethane .
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