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2001 (9)

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An introduction to linear programming and the theory of games
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ISBN: 9780486417103 0486417107 Year: 2001 Publisher: Mineola: Dover,

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Linear optimization and extensions : problems and solutions
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ISBN: 3540417443 Year: 2001 Publisher: Berlin : Springer,

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Multiple criteria and multiple constraint levels linear programming : concepts, techniques and applications
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ISBN: 9810237383 9789810237387 Year: 2001 Publisher: Singapore: World scientific,

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Dissertation
Qualité des modèles de régression logistique binaire : Effet de la proportion d'individus par catégorie et du mode d'utilisation des données.
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Year: 2001 Publisher: Gembloux : Paris-Grignon : FUSAGx ; Institut National Agronomique,

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Binary logistic regression is the most frequently used form of logistic regression. We deal with ungrouped binary data because predictors are continuous. Base rate is defined as the proportion of data having a value of the dependant variable equal to 1. We study the effect of base rate on the quality of validation of models. Selection of predictors and fitting usually use the same sample. We also study the effect of using two separate samples for selection and fitting. We first summarize important concepts about binary logistic regression. Those concepts are illustrated with a first example. We then show with three other real data sets that the proportion of individuals coded as 1 may have an impact on the quality of validation. Quality of validation decreases slightly when selection and fitting are operated on two separate samples. The second part of our work is to confirm what we have seen on real data sets. For this we generate artificial data. Tested factors are : proportion of 1, level of variability of random effect, significance level in selection, number of predictors and number of samples. On condition that the random effect and the base rate are high enough, quality of models is good especially when selection and fitting are realized on the same sample. When using a proportion of 1 close to 50 %, the effect of number of samples, significance levels and number of variables are nearly negligible. This research should be continued on other structures of data.


Book
La recherche opérationnelle
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ISBN: 2891057872 9782891057875 Year: 2001 Publisher: Boucherville: Gaëtan Morin,

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Linear programming : foundations and extensions
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ISBN: 0792373421 147575664X 1475756623 9780792373421 Year: 2001 Volume: 37 Publisher: Boston: Kluwer Academic Publishers,

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Linear Programming: Foundations and Extensions is an introduction to the field of optimization. The book emphasizes constrained optimization, beginning with a substantial treatment of linear programming, and proceeding to convex analysis, network flows, integer programming, quadratic programming, and convex optimization. The book is carefully written. Specific examples and concrete algorithms precede more abstract topics. Topics are clearly developed with a large number of numerical examples worked out in detail. Moreover, Linear Programming: Foundations and Extensions underscores the purpose of optimization: to solve practical problems on a computer. Accordingly, the book is coordinated with free efficient C programs that implement the major algorithms studied: -The two-phase simplex method; -The primal-dual simplex method; -The path-following interior-point method; -The homogeneous self-dual methods. In addition, there are online JAVA applets that illustrate various pivot rules and variants of the simplex method, both for linear programming and for network flows. These C programs and JAVA tools can be found on the book's webpage: http://www.princeton.edu/-rvdb/LPbook/. Also, check the book's webpage for new online instructional tools and exercises that have been added in the new edition. .

Modeling the supply chain
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ISBN: 0534373631 Year: 2001 Publisher: Pacific Grove (Calif.) : Duxbury press,

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Keywords

658.7 --- 658.513 --- Material requirements planning --- -Materials management --- -Business logistics --- -Industrial procurement --- -Marketing channels --- -Linear programming --- 658.5 --- 658.012 --- Matrices --- Production scheduling --- Programming (Mathematics) --- Substitutions, Linear --- Transformations (Mathematics) --- Vector analysis --- Channels, Marketing --- Channels of distribution --- Distribution channels --- Gray market --- Physical distribution of goods --- Buyer-supplier relations --- Buying, Industrial --- Industrial buying --- Industrial equipment --- Industrial purchasing --- Procurement, Industrial --- Purchasing, Industrial --- Supplier-buyer relations --- Industrial management --- Purchasing --- Supply chain management --- Logistics --- Materiel management --- Business logistics --- Inventory control --- Material accountability --- Materials requirements planning --- MRP (Manufacturing) --- Materials management --- Flexible manufacturing systems --- Buying. Purchasing. Procurement. Management of stock --- Supervision of production work. Follow-up, progressing, expediting. Scheduling --- Mathematical models --- Productiebeleid --- Planning in het bedrijf --- Voorraadbeleid. Inkoopbeleid --- Industrial procurement --- Linear programming. --- Marketing channels --- Mathematical models. --- 658.7 Buying. Purchasing. Procurement. Management of stock --- 658.513 Supervision of production work. Follow-up, progressing, expediting. Scheduling --- Linear programming

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