01665nam 2200469I 450 991070587740332120170725143550.0(CKB)5470000002453640(OCoLC)994295750(EXLCZ)99547000000245364020170724j199803 ua 0engurbn|||||||||txtrdacontentcrdamediacrrdacarrierPreconditioning the Helmholtz equation for rigid ducts /Kenneth J. Baumeister, Kevin L. KreiderCleveland, Ohio :National Aeronautics and Space Administration, Lewis Research Center,March 1998.1 online resource (18 pages) illustrationsNASA technical memorandum ;107349"March 1998.""Performing organization: National Aeronautics and Space Administration, Lewis Research Center"--Report documentation page.Includes bibliographical references (pages 5-6).Acoustic propagationnasatDuctsnasatHelmholtz equationsnasatFinite difference theorynasatPreconditioningnasatAcoustic propagation.Ducts.Helmholtz equations.Finite difference theory.Preconditioning.Baumeister Kenneth J.1400246Kreider Kevin L.Lewis Research Center,GPOGPOBOOK9910705877403321Preconditioning the Helmholtz equation for rigid ducts3485381UNINA01942oas 2200649 a 450 991069341120332120250619213018.02168-0507(OCoLC)794457814(CONSER) 2012230674(CKB)2560000000084096(EXLCZ)99256000000008409620120529b20062009 ua aengur|||||||||||txtrdacontentcrdamediacrrdacarrierFact book[Bethesda, Md.] U.S. Dept. of Health and Human Services, National Institutes of Health, National Institute of Allergy and Infectious Diseases1 online resource (4 volumes) illustrationsNIH publication2168-0493 NIH publication.FactbookFY ... fact bookFiscal year ... fact bookYear in reviewAllergyResearchUnited StatesPeriodicalsCommunicable diseasesResearchUnited StatesPeriodicalsAllergyResearchfast(OCoLC)fst00805567Communicable diseasesResearchfast(OCoLC)fst00869917United Statesfasthttps://id.oclc.org/worldcat/entity/E39PBJtxgQXMWqmjMjjwXRHgrqPeriodicals.fastPeriodicals.lcgftAllergyResearchCommunicable diseasesResearchAllergyResearch.Communicable diseasesResearch.616.97GPOGPOGPODLCOCLCQOCLCFOCLCQOCLCAGILDSOCLCQOCLCLDOSOCLCLJOURNAL9910693411203321Fact book2576881UNINA