Download or read book Contribution l tude du traitement thermique d hydrocarbures a poids mol culaire moyen written by Chantal Flicoteaux and published by . This book was released on 1990 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt: Une étude expérimentale du vapocraquage du n-hexadécane en régime dynamique a été réalisée dans deux réacteurs, l'un en quartz et l'autre en incoloy 800, en vue de produire un maximum d'éthylène et de propylène dans un domaine de température compris entre 600 et 850°C. Elle a permis de mettre en évidence l'influence de la température, de la dilution par la vapeur d'eau, du temps de contact, de la nature des parois du réacteur, sur la distribution des produits de craquage. aux faibles temperatures et taux de conversion, la vitesse globale de décomposition du n-hexadécane est du premier ordre avec un facteur de fréquence de 9,6x1013s-1, et une énergie d'activation de 57 kcal.mole-1. La distribution des produits effluents concorde avec la théorie de Rice-Kossiakoff seulement pour les températures inférieures à 650°C. Les meilleurs rendements en C3H6 et C2H4 ont été obtenus respectivement a 750°C et entre 800 et 850°C, pour 0,5 s., et un rapport en poids eau/hydrocarbure de 2,8. l'élaboration d'un modèle cinétique base sur des réactions radicalaires et moléculaires et l'utilisation d'un programme de calcul par simulation, ont permis de prévoir l'évolution de la distribution des produits effluents gazeux et liquides dans un domaine de température compris entre 600°C et 750°C. Ce modèle a été testé sur les données expérimentales acquises avec le réacteur en quartz

Download or read book Regression Modeling written by Michael Panik and published by CRC Press. This book was released on 2009-04-30 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt: Regression Modeling: Methods, Theory, and Computation with SAS provides an introduction to a diverse assortment of regression techniques using SAS to solve a wide variety of regression problems. The author fully documents the SAS programs and thoroughly explains the output produced by the programs.The text presents the popular ordinary least square

Download or read book SAS for Data Analysis written by Mervyn G. Marasinghe and published by Springer Science & Business Media. This book was released on 2008-12-10 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended for use as the textbook in a second course in applied statistics that covers topics in multiple regression and analysis of variance at an intermediate level. Generally, students enrolled in such courses are p- marily graduate majors or advanced undergraduate students from a variety of disciplines. These students typically have taken an introductory-level s- tistical methods course that requires the use a software system such as SAS for performing statistical analysis. Thus students are expected to have an - derstanding of basic concepts of statistical inference such as estimation and hypothesis testing. Understandably, adequate time is not available in a ?rst course in stat- tical methods to cover the use of a software system adequately in the amount of time available for instruction. The aim of this book is to teach how to use the SAS system for data analysis. The SAS language is introduced at a level of sophistication not found in most introductory SAS books. Important features such as SAS data step programming, pointers, and line-hold spe- ?ers are described in detail. The powerful graphics support available in SAS is emphasized throughout, and many worked SAS program examples contain graphic components.

Download or read book Particle and Particle Systems Characterization written by Wilfried Gille and published by CRC Press. This book was released on 2016-04-19 with total page 346 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small-angle scattering (SAS) is the premier technique for the characterization of disordered nanoscale particle ensembles. SAS is produced by the particle as a whole and does not depend in any way on the internal crystal structure of the particle. Since the first applications of X-ray scattering in the 1930s, SAS has developed into a standard metho

Download or read book Using SAS for Data Management Statistical Analysis and Graphics written by Ken Kleinman and published by CRC Press. This book was released on 2010-07-28 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quick and Easy Access to Key Elements of Documentation Includes worked examples across a wide variety of applications, tasks, and graphicsA unique companion for statistical coders, Using SAS for Data Management, Statistical Analysis, and Graphics presents an easy way to learn how to perform an analytical task in SAS, without having to navigate thro