April 1978最新文献

{"title":"Anwendung von Minimaxaussagen auf ein Problem der optimalen Steuerung","authors":"W. Meuche","doi":"10.1002/ZAMM.19780580408","DOIUrl":"https://doi.org/10.1002/ZAMM.19780580408","url":null,"abstract":"","PeriodicalId":330786,"journal":{"name":"April 1978","volume":"187 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116452104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Über die Lösbarkeit der Feldgleichungen des Zweiflüssigkeitsmodells für ein staubbeladenes Gas","authors":"J. Föbste","doi":"10.1515/9783112549742-002","DOIUrl":"https://doi.org/10.1515/9783112549742-002","url":null,"abstract":"","PeriodicalId":330786,"journal":{"name":"April 1978","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132852817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"On a System of p -Tuple Series Equations Related to the Scattering by an Inhomogeneous Sphere","authors":"M. Idemen","doi":"10.1515/9783112549742-005","DOIUrl":"https://doi.org/10.1515/9783112549742-005","url":null,"abstract":"","PeriodicalId":330786,"journal":{"name":"April 1978","volume":"47 9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132484420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Zur Anwendung des zeitlich diskretisierten Galerkin-Verfahrens auf eine nichtlineare Evolutionsgleichung","authors":"H. Wilke","doi":"10.1002/ZAMM.19780580409","DOIUrl":"https://doi.org/10.1002/ZAMM.19780580409","url":null,"abstract":"","PeriodicalId":330786,"journal":{"name":"April 1978","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121266081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Frontmatter","authors":"","doi":"10.1515/9783112549742-fm","DOIUrl":"https://doi.org/10.1515/9783112549742-fm","url":null,"abstract":"","PeriodicalId":330786,"journal":{"name":"April 1978","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132350369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Lösung irikonsistenter linearer Gleichungssysteme und Bestimmung einer Pseudoinversen für rechteckige Matrizen durch Spaltenapproximation","authors":"G. Maess, W. Peters","doi":"10.1515/9783112549742-006","DOIUrl":"https://doi.org/10.1515/9783112549742-006","url":null,"abstract":"","PeriodicalId":330786,"journal":{"name":"April 1978","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121970067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Die Greensche Matrix für zwei aneinander reibungsfrei gleitende elastische Halbräume mit verschiedenen Lameschen Moduln","authors":"L. Jentscii","doi":"10.1515/9783112549742-004","DOIUrl":"https://doi.org/10.1515/9783112549742-004","url":null,"abstract":"","PeriodicalId":330786,"journal":{"name":"April 1978","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127959714","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Метод функций г рина нри решении краевых аадач уравнения теплопроводности в нецилиндрических областях","authors":"Эдуард Михайлович Карташов, В. М. Нечаев","doi":"10.1515/9783112549742-003","DOIUrl":"https://doi.org/10.1515/9783112549742-003","url":null,"abstract":"","PeriodicalId":330786,"journal":{"name":"April 1978","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133642395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Mathematisches Modell und Lösung für die Schmierfilmdicke bei elastohydrodynamischem Kugelkontakt","authors":"C. Weber, E. Adams","doi":"10.1002/ZAMM.19780580402","DOIUrl":"https://doi.org/10.1002/ZAMM.19780580402","url":null,"abstract":"Die durch O. Reynolds (1886) begrundete klassische hydrodynamische Schmiertheorie fuhrt u. a. im Fall der hier behandelten Punktberuhrung auf ein nicht akzeptables Ergebnis: Die durch Kapitza [10] angegebene Losung fur den Fall des Kugelkontaktes liefert das Verschwinden des Integrals uber die Druckverteilung und damit auch der Traglast. Es wird hier gezeigt, das diese Losung eindeutig ist. Entgegen experimentellen Beobachtungen [20] ergibt die elastohydrodynamische Behandlung des Problems in [2] und in [3] negative Drucke mit nicht vernachlassigbar kleinem Betrag auf der Abstromseite. Dieser Mangel wird hier durch eine physikalisch begrundete Abanderung des Freigliedes der Reynoldsschen Gleichung vermieden. Das dabei benutzte mathematische Modell beschreibt die elastische Verformung naherungsweise durch Annahme eines kreisformigen Hertzschen Spaltes konstanter Filmdicke h0, auserhalb dessen die beiden festen Kugeln unverformt sind. Damit wird die Druckverteilung im inkompressiblen isothermen Schmierfilm uberwiegend explizit sowie mit Fehlerabschatzung einer Differenzenlosung bestimmt. Durch Ubergang zur Grenze groser Lasten ergibt sich hieraus die Parameterabhangigkeit von h0 in groserer Allgemeinheit als in [2] oder in [3]. \u0000 \u0000 \u0000 \u0000The classical hydrodynamic theory, which was founded by O. Reynolds (1886), yields an unacceptable result in particular in case of the point contact under consideration here: according to Kapitza's solution [10], the integral of the distribution of the pressure p and, therefore, the load are zero. The uniqueness of this solution is shown here. Opposite to experimental observations, the elastohydrodynamic treatment of the problem in [2] and in [3] yields non-negligible negative values of p downstream of the point of closest distance of the spheres. This shortcoming is avoided here by use of a physically justified modification of the right-hand side of Reynolds' equation. The mathematical model employed here approximates the elastic deformation by assuming a circular Hertzian contact area with constant film thickness h0 and no deformation of the spheres outside of this gap. By use of this model, the pressure distribution in the incompressible isothermal liquid film is determined predominantly explicitly and with an error estimate for a difference solution. In the limit of large loads, h0 as a function of parameters is determined here with more generality than in [2] and in [3].","PeriodicalId":330786,"journal":{"name":"April 1978","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1978-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130590205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}