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Book Description
AU COURS DE CE TRAVAIL, NOUS AVONS UTILISE LE DICHROISME MAGNETIQUE CIRCULAIRE DE RAYONS-X (XMCD), LA DIFFUSION MAGNETIQUE COMPTON DE RAYONS-X DE HAUTE ENERGIE (MCS) ET LA DIFFRACTION DE NEUTRONS POUR L'ETUDE DES PROPRIETES MAGNETIQUES DE PLUSIEURS COMPOSES A BASE D'URANIUM ET DE CERIUM : US, UNI 2AL 3, UGE 2, CEFE 2 ET LES MULTICOUCHES U-AS/CO. DES EXPERIENCES DE MCS ET DE XMCD AUX SEUILS M 4 , 5 DE L'URANIUM ONT ETE REALISEES SUR US. L'ASSOCIATION DE CES RESULTATS AVEC CEUX PRECEDEMMENT OBTENUS PAR DIFFRACTION DE NEUTRONS POLARISES PERMET LA SEPARATION DES CONTRIBUTIONS D'ORBITE ET DE SPIN DES MOMENTS LOCALISES ET DIFFUS. NOUS COMPARONS NOS RESULTATS AVEC CEUX PUBLIES POUR USE ET UTE. UNE ETUDE DU FERMION-LOURD SUPRACONDUCTEUR ANTIFERROMAGNETIQUE UNI 2AL 3 DANS SA PHASE PARAMAGNETIQUE A ETE EFFECTUEE PAR DIFFRACTION DE NEUTRONS POLARISES ET PAR XMCD AUX SEUILS U-M 4 , 5. LES ANALYSES DES DONNEES MESUREES PAR DIFFRACTION DE NEUTRONS, INDIQUENT LA PRESENCE D'UN MOMENT INDUIT SUR LES SITES DE NI. NOS RESULTATS SONT COMPARES A CEUX PUBLIES SUR UPD 2AL 3. LA STRUCTURE MAGNETIQUE DE UGE 2 A ETE ETUDIEE PAR DIFFRACTION DE NEUTRONS NON-POLARISES. DES MESURES DE DIFFRACTION DE NEUTRONS POLARISES ET DE XMCD ONT EGALEMENT ETE EFFECTUEES ET ONT PERMIS DE DETERMINER LES VALEURS DES MOMENTS MAGNETIQUES D'ORBITE ET DE SPIN SUR U. LES PROFILS MAGNETIQUES COMPTON DE CEFE 2 ET LUFE 2 ONT ETE MESURES. LA COMPARAISON DE TOUS LES RESULTATS DISPONIBLES SUR CEFE 2 TRADUIT DES PROBLEMES QU'IL SEMBLE RAISONNABLE D'ATTRIBUER A LA QUALITE DES ECHANTILLONS ETUDIES. POUR FINIR, DES MESURES XMCD AUX SEUILS U-M 4 , 5 DANS LES MULTICOUCHES U-AS/CO, ONT MIS EN EVIDENCE UN MOMENT SUR U A TEMPERATURE AMBIANTE, INDUIT PAR COUPLAGE D'ECHANGE AVEC CO. CE TRAVAIL SOULIGNE L'IMPORTANCE D'ASSOCIER DIFFERENTES TECHNIQUES ET DE COMPARER LES RESULTATS DE COMPOSES PARENTS POUR LA COMPREHENSION DES PROCESSUS D'HYBRIDATION.
Book Description
AU COURS DE CE TRAVAIL, NOUS AVONS UTILISE LE DICHROISME MAGNETIQUE CIRCULAIRE DE RAYONS-X (XMCD), LA DIFFUSION MAGNETIQUE COMPTON DE RAYONS-X DE HAUTE ENERGIE (MCS) ET LA DIFFRACTION DE NEUTRONS POUR L'ETUDE DES PROPRIETES MAGNETIQUES DE PLUSIEURS COMPOSES A BASE D'URANIUM ET DE CERIUM : US, UNI 2AL 3, UGE 2, CEFE 2 ET LES MULTICOUCHES U-AS/CO. DES EXPERIENCES DE MCS ET DE XMCD AUX SEUILS M 4 , 5 DE L'URANIUM ONT ETE REALISEES SUR US. L'ASSOCIATION DE CES RESULTATS AVEC CEUX PRECEDEMMENT OBTENUS PAR DIFFRACTION DE NEUTRONS POLARISES PERMET LA SEPARATION DES CONTRIBUTIONS D'ORBITE ET DE SPIN DES MOMENTS LOCALISES ET DIFFUS. NOUS COMPARONS NOS RESULTATS AVEC CEUX PUBLIES POUR USE ET UTE. UNE ETUDE DU FERMION-LOURD SUPRACONDUCTEUR ANTIFERROMAGNETIQUE UNI 2AL 3 DANS SA PHASE PARAMAGNETIQUE A ETE EFFECTUEE PAR DIFFRACTION DE NEUTRONS POLARISES ET PAR XMCD AUX SEUILS U-M 4 , 5. LES ANALYSES DES DONNEES MESUREES PAR DIFFRACTION DE NEUTRONS, INDIQUENT LA PRESENCE D'UN MOMENT INDUIT SUR LES SITES DE NI. NOS RESULTATS SONT COMPARES A CEUX PUBLIES SUR UPD 2AL 3. LA STRUCTURE MAGNETIQUE DE UGE 2 A ETE ETUDIEE PAR DIFFRACTION DE NEUTRONS NON-POLARISES. DES MESURES DE DIFFRACTION DE NEUTRONS POLARISES ET DE XMCD ONT EGALEMENT ETE EFFECTUEES ET ONT PERMIS DE DETERMINER LES VALEURS DES MOMENTS MAGNETIQUES D'ORBITE ET DE SPIN SUR U. LES PROFILS MAGNETIQUES COMPTON DE CEFE 2 ET LUFE 2 ONT ETE MESURES. LA COMPARAISON DE TOUS LES RESULTATS DISPONIBLES SUR CEFE 2 TRADUIT DES PROBLEMES QU'IL SEMBLE RAISONNABLE D'ATTRIBUER A LA QUALITE DES ECHANTILLONS ETUDIES. POUR FINIR, DES MESURES XMCD AUX SEUILS U-M 4 , 5 DANS LES MULTICOUCHES U-AS/CO, ONT MIS EN EVIDENCE UN MOMENT SUR U A TEMPERATURE AMBIANTE, INDUIT PAR COUPLAGE D'ECHANGE AVEC CO. CE TRAVAIL SOULIGNE L'IMPORTANCE D'ASSOCIER DIFFERENTES TECHNIQUES ET DE COMPARER LES RESULTATS DE COMPOSES PARENTS POUR LA COMPREHENSION DES PROCESSUS D'HYBRIDATION.
Author: Ali Zolghadri Publisher: Springer Science & Business Media ISBN: 1447153138 Category : Technology & Engineering Languages : en Pages : 227
Book Description
Fault Diagnosis and Fault-Tolerant Control and Guidance for Aerospace demonstrates the attractive potential of recent developments in control for resolving such issues as flight performance, self protection and extended-life structures. Importantly, the text deals with a number of practically significant considerations: tuning, complexity of design, real-time capability, evaluation of worst-case performance, robustness in harsh environments, and extensibility when development or adaptation is required. Coverage of such issues helps to draw the advanced concepts arising from academic research back towards the technological concerns of industry. Initial coverage of basic definitions and ideas and a literature review gives way to a treatment of electrical flight control system failures: oscillatory failure, runaway, and jamming. Advanced fault detection and diagnosis for linear and linear-parameter-varying systems are described. Lastly recovery strategies appropriate to remaining actuator/sensor/communications resources are developed. The authors exploit experience gained in research collaboration with academic and major industrial partners to validate advanced fault diagnosis and fault-tolerant control techniques with realistic benchmarks or real-world aeronautical and space systems. Consequently, the results presented in Fault Diagnosis and Fault-Tolerant Control and Guidance for Aerospace, will be of interest in both academic and aerospatial-industrial milieux.
Author: Sebastian Oberthür Publisher: Springer Science & Business Media ISBN: 3662039257 Category : Science Languages : en Pages : 369
Book Description
The adoption of the Kyoto Protocol in December 1997 was a major achievement in the endeavour to tackle the problem of global climate change at the dawn of the 21st century. After many years of involvement in the negotiation process, the book's two internationally recognised authors now offer the international community a first hand and inside perspective of the debate on the Kyoto Protocol. The book provides a comprehensive scholarly analysis of the history and content of the Protocol itself as well as of the economic, political and legal implications of its implementation. It also presents a perspective for the further development of the climate regime. These important features make this book an indispensable working tool for policy makers, negotiators, academics and all those actively involved and interested in climate change issues in both the developed and developing world.
Author: CRAIG GRIMES Publisher: Springer Science & Business Media ISBN: 0387682384 Category : Technology & Engineering Languages : en Pages : 561
Book Description
This book covers the field of solar production of hydrogen by water photo-splitting (photoelectrolysis) using semiconductor photoanodes. The emphasis of the discussion is on the use of nanotechnology in the field. The theories behind photocatalysis and photoelectrochemical processes responsible for hydrogen production are given in detail. This provides a state-of-the-art review of the semiconductor materials and methods used for improving the efficiency of the processes. The book also gives an account of the techniques used for making the nanostructures.
Author: Eugene Lavretsky Publisher: Springer ISBN: 9783031383137 Category : Technology & Engineering Languages : en Pages : 0
Book Description
Robust and Adaptive Control (second edition) shows readers how to produce consistent and accurate controllers that operate in the presence of uncertainties and unforeseen events. Driven by aerospace applications, the focus of the book is primarily on continuous-time dynamical systems. The two-part text begins with robust and optimal linear control methods and moves on to a self-contained presentation of the design and analysis of model reference adaptive control for nonlinear uncertain dynamical systems. Features of the second edition include: sufficient conditions for closed-loop stability under output feedback observer-based loop-transfer recovery (OBLTR) with adaptive augmentation; OBLTR applications to aerospace systems; case studies that demonstrate the benefits of robust and adaptive control for piloted, autonomous and experimental aerial platforms; realistic examples and simulation data illustrating key features of the methods described; and problem solutions for instructors and MATLAB® code provided electronically. The theory and practical applications address real-life aerospace problems, being based on numerous transitions of control-theoretic results into operational systems and airborne vehicles drawn from the authors’ extensive professional experience with The Boeing Company. The systems covered are challenging—often open-loop unstable with uncertainties in their dynamics—and thus require both persistently reliable control and the ability to track commands either from a pilot or a guidance computer. Readers should have a basic understanding of root locus, Bode diagrams, and Nyquist plots, as well as linear algebra, ordinary differential equations, and the use of state-space methods in analysis and modeling of dynamical systems. The second edition contains a background summary of linear systems and control systems and an introduction to state observers and output feedback control, helping to make it self-contained. Robust and Adaptive Control teaches senior undergraduate and graduate students how to construct stable and predictable control algorithms for realistic industrial applications. Practicing engineers and academic researchers will also find the book of great instructional value.
Author: David Adler Publisher: Springer Science & Business Media ISBN: 1489922601 Category : Science Languages : en Pages : 448
Book Description
The Institute for Amorphous Studies was founded in 1982 as the international center for the investigation of amorphous mate rials. It has since played an important role in promoting the und er standing of disordered matter in general. An Institute lecture series on "Fundamentals of Amorphous Materials and Devices" was held during 1982-83 with distinguished speakers from universities and industry. These events were free and open to the public ,and were attended by many representatives of the scientific community. The lectures themselves were highly successful inasmuch as they provided not only formal instruction but also an opportunity for vigorous and stimulating debate. That last element could not be captured within the pages of a book I but the lectures concentrated on the latest advances in the field I which is why their essential contents are he re reproduced in collective form. Together they constitute an interdisciplinary status report of the field. The speakers brought many different viewpoints and a variety of back ground experiences io bear on the problems involved I but though language and conventions vary I the essential unity of the concerns is very clear I as indeed are the ultimate benefits of the many-sided approach.
Author: Jean Daillant Publisher: Springer Science & Business Media ISBN: 3540486968 Category : Science Languages : en Pages : 347
Book Description
The reflection of and neutrons from surfaces has existed as an x-rays exp- imental for almost it is in the last technique fifty Nevertheless, only years. decade that these methods have become as of enormously popular probes This the surfaces and interfaces. to be due to of several appears convergence of intense different circumstances. These include the more n- availability be measured orders tron and sources that can over (so reflectivity x-ray many of and the much weaker surface diffuse can now also be magnitude scattering of thin films and studied in some the detail); growing importance multil- basic the realization of the ers in both and technology research; important which in the of surfaces and and role roughness plays properties interfaces; the of statistical models to characterize the of finally development topology its and its characterization from on roughness, dependence growth processes The of and to surface scattering experiments. ability x-rays neutro4s study four five orders of in scale of surfaces over to magnitude length regardless their and also their to ability probe environment, temperature, pressure, etc. , makes these the choice for buried interfaces often probes preferred obtaining information about the microstructure of often in statistical a global surfaces, the local This is manner to complementary imaging microscopy techniques, of such studies in the literature witnessed the veritable by explosion published the last few Thus these lectures will useful for over a resource years.
Author: NOLWENN.. KERNAVANOIS
Author: NOLWENN.. KERNAVANOIS
Author: Ali Zolghadri
Author: F. P. Gopsill
Author: Nasser Ennih
Author: Sebastian Oberthür
Author: CRAIG GRIMES
Author: Eugene Lavretsky
Author: David Adler
Author: Jean Daillant
Author: Philostratus (the Athenian)