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Komplexit?tsbew?ltigung im Multiprojektmanagement: Die Handlungsperspektive der Multiprojektleiter
Pommeranz, Inna - 2011
Die Komplexit?t ist mehr in jeder Hinsicht und darf nicht "simplifziert" werden. Das Ziel dieser empirischen Studie ist eine Antwort auf die Fragen zu finden, ob die objektiv-rationale Komplexit?tsbew?ltigung im Multiprojektmanagement an ihre Grenzen st??t und, daraus abgeleitet, wie...
Persistent link: https://www.econbiz.de/10009482330
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Model selection and error estimation
Bartlett, P. L.; Boucheron, S.; Lugosi, G. - 2002
We study model selection strategies based on penalized empirical loss minimization. We point out a tight relationship between error estimation and data-based complexity penalization: any good error estimate may be converted into a data-based penalty function and the performance of the estimate...
Persistent link: https://www.econbiz.de/10009438376
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Theoretical Results and Applications Related to Dimension Reduction
Chen, Jie - 2007
To overcome the curse of dimensionality, dimension reduction is important andnecessary for understanding the underlying phenomena in a variety of fields.Dimension reduction is the transformation of high-dimensional data into ameaningful representation in the low-dimensional space. It can be...
Persistent link: https://www.econbiz.de/10009475737
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Modeling the spread of disease through a population
Lauren A. Meyers (contributor) - 2009
As disease spreads through a population, scientists want to know who gets sick, how bestto prevent a large outbreak, and if an epidemic may occur. For many years, mathematicians usedmodels to approximate answers to these questions; however, these older models used simplifyingassumptions about...
Persistent link: https://www.econbiz.de/10009429368
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Robust Statistical Tests for Detecting the Effects of Interspecific Competition on Ecological Communities
Ladau, Joshua - 2005
For seventy years ecologists have debated to what extent competition affects the composition of ecological communities. At one extreme, species have been proposed to assemble independently of each other, while at the other extreme, competition and other interspecific interactions have been...
Persistent link: https://www.econbiz.de/10009466183
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The Price Shock Transmission during the 2007-2008 Commodity Bull Cycle: A Structural Vector Auto-Regression Approach to the "Chicken-or-Egg" Problem
Power, Gabriel J.; Vedenov, Dmitry V. - 2009
Commodity and energy prices have exhibited an unprecedented increase between October 2006 and July 2008, only to fall sharply during the last months of 2008. Many explanations have been offered to this phenomenon, including steadily increasing demand from China and India, large mandated...
Persistent link: https://www.econbiz.de/10009444738
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A new hybrid method for bayesian network learning with dependency constraints
Schulte, Oliver; Frigo, Gustavo; Greiner, Russell; Luo, Wei - 2009
A Bayes net has qualitative and quantitative aspects: The qualitative aspect is its graphical structure that corresponds to correlations among the variables in the Bayes net. The quantitative aspects are the net parameters. This paper develops a hybrid criterion for learning Bayes net structures...
Persistent link: https://www.econbiz.de/10009448619
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Standortplanung für einen privaten Paketdienstleister
Lischak, Christoph - 2001
Standortproblem mathematisch exakt zu lösen. Stattdessen wurde eine speziell angepasste VRPB-Heuristik entwickelt und innerhalb des … werden konnte. Es wurde nachgewiesen, dass die Güte der von der Heuristik berechneten Standortauswahl die manuellen Planungen …
Persistent link: https://www.econbiz.de/10009467411
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Effiziente Lokale Suche für Vehicle Routing und Scheduling Probleme mit Ressourcenbeschränkungen
Funke, Birger - 2003
der Nachbarschaften in eine Meta-Heuristik ist die zugrundeliegende Intention der Untersuchungen, steht aber nicht selbst … gibt zu der Vermutung Anlaß, daß durch eine adäquate Integration der Nachbarschaften in eine Meta-Heuristik leistungsfähige …The development of efficient heuristics for Vehicle Routing and Scheduling Problems has been the subject of many …
Persistent link: https://www.econbiz.de/10009467424
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Dynamische Tourenplanung und -steuerung
Boomgaarden, Christoph - 2007
In dieser Arbeit werden dynamisch-determinstische Tourenplanungsproblemeund dynamisch-stochastische Tourensteuerungsprobleme auf Basis von Verkehrswegenetzwerken beschrieben, modelliert und L?sungsverfahren experimentell untersucht.Zun?chst wird ein neues Modell zur Abbildung von...
Persistent link: https://www.econbiz.de/10009484804