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Methodes De Selection De Variables Appliquees En Spectroscopie Proche Infrarouge Pour Lanalyse Et La Classification De Textiles
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Book Synopsis Méthodes de sélection de variables appliquées en spectroscopie proche infrarouge pour l'analyse et la classification de textiles by : Alexandra Durand
Download or read book Méthodes de sélection de variables appliquées en spectroscopie proche infrarouge pour l'analyse et la classification de textiles written by Alexandra Durand and published by . This book was released on 2007 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Les méthodes d'analyse multivariée permettent d'extraire l'information présente dans les données spectroscopiques expérimentales pour la prédiction d'une propriété d'intérêt. La dimensionnalité des données en spectroscopie proche infrarouge est telle qu'une sélection des variables spectroscopiques et d'échantillons est nécessaire afin d'améliorer les performances, la robustesse des modèles ou de tendre vers une instrumentation simplifiée. L'analyse rapide de la composition chimique des échantillons textiles est fondamentale dans certaines applications. Une première étude concerne la détermination de la teneur en coton dans des mélanges de fibres coton/polyester et coton/viscose par spectroscopie proche infrarouge. Afin d'améliorer les capacités prédictives obtenues sur les spectres complets, deux procédures de sélection de variables, l'information mutuelle et les algorithmes génétiques, ont été appliquées. L'erreur standard de prédiction obtenue pour le lot coton/polyester est de 2,53% sur les 8 variables sélectionnées par l'information mutuelle. Une seconde étude présente l'analyse qualitative pour la classification d'échantillons textiles dans trois classes par rapport à une propriété physicochimique d'intérêt. La méthode des support vector machine présente des résultats performants avec un taux d'échantillons bien classé en prédiction de 88,8%. La réduction arbitraire du nombre de variables spectroscopiques a permis de montrer que les capacités prédictives obtenues sur les spectres complets ne sont pas dégradées. Ces résultats sont confirmés par l'utilisation d'une instrumentation simplifiée.
Book Synopsis APPLICATIONS PRATIQUES ET INTERETS DE LA SPECTROSCOPIE DANS LE PROCHE INFRAROUGE POUR CARACTERISER LES RESSOURCES EN MILIEUX TROPICAL by : A.. BAUDOUX
Download or read book APPLICATIONS PRATIQUES ET INTERETS DE LA SPECTROSCOPIE DANS LE PROCHE INFRAROUGE POUR CARACTERISER LES RESSOURCES EN MILIEUX TROPICAL written by A.. BAUDOUX and published by . This book was released on 2003 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quel est le potentiel de la spectroscopie dans le proche infrarouge (SPIR) en recherche en alimentation animale ? Cette méthode d'analyse s'intéresse aux spectres d'absorption de la lumière par les liaisons de molécules organiques. Des calculs de calibration permettent au dispositif de prédire la valeur alimentaire de divers produits. La particularité de ces mesures est qu'elles donnent pour un coût marginal faible des résultats rapides, fiables et surtout ne limitent plus les protocoles expérimentaux au nombre d'échantillons analysés. D'autre part, les spectres proches infrarouge peuvent être exploités dans d'autres domaines, par exemple la discrimination de différents types d'échantillon... Nous illustrons cette technique, en l'appliquant aux ressources de l'élevage laitier du Delta Sud du fleuve Sénégal. D'abord, en ce qui concerne le son de riz, la variabilité et le manque de connaissance de sa valeur nutritive rend difficile son utilisation rationnelle. Nous avons recherché les facteurs de variation de la valeur nutritive du son de riz. Ce travail exige une base de données importante. Un échantillonnage de 90 éléments comparés grâce au SPIR, a mis en évidence les différences entre divers types de produit selon leur mode de fabrication. De plus, afin d'avoir un moyen d'identifier la qualité des sons, nous avons mesuré la corrélation entre la couleur et la valeur alimentaire. Cette étude montre que ce caractère contient une certaine part de l'information sur la valeur alimentaire. Cependant, la précision est insuffisante pour être utilisée en pratique dans ce cas. En outre, avec les données spectrales, une équation de discrimination a été calculée pour permettre de retrouver l'appartenance d'un échantillon inconnu à une catégorie déterminée. Les résultats obtenus montrent que l'emploi du SPIR pour ce genre d'étude nécessite une base de données importante et un outil mathématique performant. Enfin, l'analyse des espèces fourragères des pâturages par le SPIR serait longue s'il fallait mettre en place une calibration sur chacune d'elle. D'autres méthodes de prédiction permettent de donner directement la valeur alimentaire. Néanmoins, les analyses classiques de laboratoire sont toujours indispensables pour valider ces prédictions. Pour conclure, l'intérêt du SPIR en recherche en alimentation animale, outre le gain de temps et d'argent est de pouvoir mettre en place des dispositifs expérimentaux complets exploitant l'information de nombreux prélèvements. La principale contraintes pratique est l'acquisition pour ces études de bases de données importantes à la fois adaptées aux objectifs de recherche, mais aussi au spectrophotomètre.
Book Synopsis Interprétation de spectres de réflexion dans l'infrarouge proche et moyen de produits agro-alimentaires par des méthodes d'analyse multidimensionnelle by : Marie-Françoise Devaux
Download or read book Interprétation de spectres de réflexion dans l'infrarouge proche et moyen de produits agro-alimentaires par des méthodes d'analyse multidimensionnelle written by Marie-Françoise Devaux and published by . This book was released on 1988 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Utilisation des analyses multidimensionnelles en spectroscopie de reflexion dans le proche infrarouge by : Dominique Bertrand
Download or read book Utilisation des analyses multidimensionnelles en spectroscopie de reflexion dans le proche infrarouge written by Dominique Bertrand and published by . This book was released on 1988 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans cette étude, de nouvelles procédures mathématiques sont étudiées, avec pour objectif de simplifier et de rendre plus cohérentes l'exploitation des données spectrales. Les essais ont porté principalement sur le blé et sur ses produits de mouture. Une expérience, effectuée sur des mélanges modèles de matières premières, montre que l'analyse en composantes principales est applicable aux données spectrales et donne des résultats interprétables. Deux essais portent sur la discrimination des variétés de blés à partir des spectres proche infrarouges des échantillons. Enfin, à partir d'une étude de produits dérivés du blé dur, il a été possible de montrer que les analyses multidimensionnelles créent implicitement un "modèle spectral" interprétable en terme de spectroscopie. L'application des méthodes mathématiques étudiées est un moyen de rendre plus fiable et plus riche d'informations la SPIR
Download or read book ICREEC 2019 written by Ahmed Belasri and published by Springer Nature. This book was released on 2020-06-10 with total page 659 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Book Synopsis Imitation and Illusion by : Ingrid Geelen
Download or read book Imitation and Illusion written by Ingrid Geelen and published by Royal Institute for Cultural Heritage. This book was released on 2011 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the late Middle Ages luxurious textiles were among the most highly prized indicators of status and wealth and an essential requirement of prestigious secular and ecclesiastical life. The depiction of these sumptuous silks and gold brocades was a crucial element in the visual arts, and their realistic and recognizable representation was a challenge to every artist. Painters and polychromers strove to imitate the fashionable fabrics by using applied brocade, a highly sophisticated form of relief decoration that adhered to panel paintings, murals and sculpture and through the play of light and shadow evoked the dazzling illusion of gold-brocaded cloths. Imitation and Illusion is the result of a detailed study of applied brocade in the art of the Low Countries. Eleven fascinating and innovative chapters offer an in-depth examination of the historical, geographical, morphological and technical aspects of this cast tin relief technique. New light is also shed on artistic collaboration and workshop practice in the fifteenth and early sixteenth century. The catalogue includes 86 well known and lesser known panel and wall paintings, sculptures, altarpieces, and architectural elements produced between 1420 and 1540, decorated with applied brocade and providing stunning testimony to the visual variety and material magnificence of late-medieval art. Abundantly illustrated, Imitation and Illusion investigates the artistic production of the fifteenth- and sixteenth-century Low Countries from an intriguing and original perspective. It represents a significant contribution to our understanding of medieval polychromy and will appeal to everyone whose curiosity is aroused by the illusionistic ingenuity of the medieval artist.
Book Synopsis Biotechnology and Sustainable Development by : Ismail Serageldin
Download or read book Biotechnology and Sustainable Development written by Ismail Serageldin and published by CABI. This book was released on 2003 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on the first scientific conference convened at the Library of Alexandria, 'Biotechnology and Sustainable Development: Voices of the South and North', which was held in Alexandria, Egypt, in March 2002, this book contains overviews of agriculture, health, ethics and the environment. It discusses how dramatic improvements in food security, health, and lifestyle could accrue to the poor people of developing countries through the applications of new technologies.
Book Synopsis Organic Solid-State Lasers by : Sébastien Forget
Download or read book Organic Solid-State Lasers written by Sébastien Forget and published by Springer. This book was released on 2013-07-03 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: Organic lasers are broadly tunable coherent sources, potentially compact, convenient and manufactured at low-costs. Appeared in the mid 60’s as solid-state alternatives for liquid dye lasers, they recently gained a new dimension after the demonstration of organic semiconductor lasers in the 90's. More recently, new perspectives appeared at the nanoscale, with organic polariton and surface plasmon lasers. After a brief reminder to laser physics, a first chapter exposes what makes organic solid-state organic lasers specific. The laser architectures used in organic lasers are then reviewed, with a state-of-the-art review of the performances of devices with regard to output power, threshold, lifetime, beam quality etc. A survey of the recent trends in the field is given, highlighting the latest developments with a special focus on the challenges remaining for achieving direct electrical pumping of organic semiconductor lasers. A last chapter covers the applications of organic solid-state lasers.
Author :United States. Department of Transportation. Assistant Secretary for Governmental Affairs Publisher : ISBN 13 : Total Pages :80 pages Book Rating :4.3/5 ( download)
Book Synopsis Transportation and the Future by : United States. Department of Transportation. Assistant Secretary for Governmental Affairs
Download or read book Transportation and the Future written by United States. Department of Transportation. Assistant Secretary for Governmental Affairs and published by . This book was released on 1979 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flexoelectricity in Liquid Crystals by : Agnes Buka
Download or read book Flexoelectricity in Liquid Crystals written by Agnes Buka and published by World Scientific. This book was released on 2013 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Book Synopsis Modern Surface Organometallic Chemistry by : Jean-Marie Basset
Download or read book Modern Surface Organometallic Chemistry written by Jean-Marie Basset and published by John Wiley & Sons. This book was released on 2009-07-10 with total page 725 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.
Book Synopsis Sheep and Goat Production by : I. E. Coop
Download or read book Sheep and Goat Production written by I. E. Coop and published by Elsevier Science & Technology. This book was released on 1982 with total page 520 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ecology and distribution; Breeding; Reproduction; Maintenance and growth; Pregnancy; Lactation of suckling ewes and does; Nutritional diseases; Infectious diseases of sheep and goats; Internal parasites of sheep and goats; External parasites of sheep and goats; Growth and characteristics of wool and hair; Wiik grading and marketing; Livestock and meat marketing and grading; Carcase and meat qualities; Milk production in sheep and goats; Systems, biological and economic efficiencies; Very extensive systems; Extensive grazing systems; Intensive grassland systems; Intensive arable systems; Very intensive systems; Government controlled systems; Migratory (Transhumance) systems; Nomadic systems; Village and smallholder systems; List of contributors.
Download or read book Cellulose written by Matheus Poletto and published by BoD – Books on Demand. This book was released on 2015-12-09 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cellulose - Fundamental Aspects and Current Trends consists of 10 chapters written by international subject matter experts investigating the characteristics and current applications of this fascinating material. This book will help the reader to develop a deeper understanding about the concepts related to cellulose and the nanocellulose structure, modification, production, dissolution, and application. Biosynthesis mechanisms and medical applications of microbial cellulose are also discussed. This book will serve as the starting point for materials science researchers, engineers, and technologists from diverse backgrounds in physics, chemistry, biology, materials science, and engineering who want to know and better understand the unique characteristics of the most abundant biopolymer on earth.
Book Synopsis Laser: 50 Years Of Discoveries by : Fabien Bretenaker
Download or read book Laser: 50 Years Of Discoveries written by Fabien Bretenaker and published by World Scientific. This book was released on 2014-10-27 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique book provides an overview of the principle and applications of lasers enriched with numerous illustrations.Being over fifty years old, lasers continue to amaze us. Their performance characteristics are constantly reaching new limits, and the scope of their applications continues to expand. Yet, it took years of effort by teams of physicists to transform the fundamental notions of Einstein into the first experimental beam of laser light. And history is still going on as fundamental research is now triggered by its remarkable properties.This book addresses every aspects of laser light, from its fundamental principles to its industrial applications, at a level particularly suited for high school teachers, students, and anybody curious about science and technology.
Book Synopsis Connected Objects in Health by : Laure Beyala
Download or read book Connected Objects in Health written by Laure Beyala and published by Elsevier. This book was released on 2017-08-10 with total page 186 pages. Available in PDF, EPUB and Kindle. Book excerpt: Connected objects today present a range of opportunities in medicine. We live in a new digital era where the monitoring and analysis of one’s own health information no longer belongs solely to the realm of science fiction. The success of these new devices resides in their usage, which integrates seamlessly into the daily life of the user in order to continually collect the maximum amount of data. These medical connected devices therefore constitute a new hope in transforming user experience as well as the care pathway. They offer a better level of support and a better quality of life for those suffering from chronic illnesses or mental, sensorial or physical disabilities. However, these solutions also pose systematic problems, especially regarding the risks linked to their usage. This book presents a cartography which clearly details all the potential risk scenarios linked to the usage of connected devices as well as the actions which should be undertaken to promote balanced governance and guarantee the development of high-quality medical devices. Aims to help the reader understand the difference between a connected object and a medical connected device Identifies and evaluates all the potential risks and perspectives associated with the use of connected medical devices Shows how to make a comprehensive risk analysis with standards like ISO 31000 and 14971
Book Synopsis Wood and Cellulosic Chemistry by : David N.-S. Hon
Download or read book Wood and Cellulosic Chemistry written by David N.-S. Hon and published by Marcel Dekker. This book was released on 1990 with total page 1100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Details the basics of wood formation, structure, and chemistry, by describing both fundamental and applied studies. Reviews Japanese approaches on wood chemistry research and interpretation of data, examines chemical modifications of wood and its constituents, and introduces biomass conversion. Topi
Book Synopsis Nonlinear Optical Materials by : Jerome V. Moloney
Download or read book Nonlinear Optical Materials written by Jerome V. Moloney and published by Springer Science & Business Media. This book was released on 1998-08-13 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mathematical methods play a significant role in the rapidly growing field of nonlinear optical materials. This volume discusses a number of successful or promising contributions. The overall theme of this volume is twofold: (1) the challenges faced in computing and optimizing nonlinear optical material properties; and (2) the exploitation of these properties in important areas of application. These include the design of optical amplifiers and lasers, as well as novel optical switches. Research topics in this volume include how to exploit the magnetooptic effect, how to work with the nonlinear optical response of materials, how to predict laser-induced breakdown in efficient optical devices, and how to handle electron cloud distortion in femtosecond processes.
