Radiometrie micro-onde par correlation : definition d'un nouveau type de micro-capteur thermique PDF Download

Author: Djamel Allal
Publisher:
ISBN:
Category :
Languages : fr
Pages : 0

View

Book Description

Author: Djamel Allal
Publisher:
ISBN:
Category :
Languages : fr
Pages : 200

View

Book Description
Ce nouveau capteur, qui concerne la reconstitution du profil de température le long de lignes de transmission dissipatives, est basé sur le traitement du signal fourni par un corrélateur micro-onde connecté aux deux extrémités du dispositif. Un modèle basé sur le concept d'ondes de bruit a été développé. Il s'applique à des lignes de transmission homogènes et hétérogènes, et conduit à la définition de paramètres de couplage radiométriques normalises, condition nécessaire à l'inversion des signaux. Comme souvent en radiométrie, les problèmes sont mal posés et le rapport signal sur bruit généralement faible. Le traitement doit être mené de façon statistique ; ce travail montre qu'un filtrage de Kalman est bien adapté à ce type de problème. Une partie expérimentale importante et originale traite des lignes discontinues et d'autres lignes de forme plus complexe, notamment en méandre, en vue d'une reconstitution des températures à deux dimensions. Les résultats correspondants sont très généralement en bon accord avec la théorie. Une partie prospective est consacrée à la résolution spatiale et en température du procèdé. Elle valide l'intérêt du procèdé dans la définition d'un micro-capteur thermique incluant des radiomètres en bande centimétrique et millimétrique, capables de conduire à une résolution spatiale de 200 microns.

Author:
Publisher: Ed. Techniques Ingénieur
ISBN:
Category :
Languages : fr
Pages : 18

View

Book Description

Author: Mehrez Zribi
Publisher: Elsevier
ISBN: 0128180862
Category : Science
Languages : en
Pages : 352

View

Book Description
Water Resources in the Mediterranean Region summarizes and collates scientific developments around water resources in the Mediterranean socio-economic environment through a multidisciplinary framework synthesizing hydrology, hydrogeology, climate, bioclimatology, economics, and geography. As such, it provides essential information for any reader looking to learn more about the Mediterranean which is experiencing the impact of climate change and concurrent complex issues of anthropogenic effects, especially in agriculture and other resource uses. Water Resources in the Mediterranean Region covers different challenges in the issue of the evolution of water resources in the Mediterranean. It is intended for PhD students, research scientists, and managers interested in new solutions and approaches for water management and in the forecast of future water dynamics. Offers multidisciplinary content providing global visions of the challenges faced in the Mediterranean region Presents fundamental and operational studies, providing the reader with information on how to implement these actions and results themselves Written in a pedagogical manner, allowing for ease of reading for both researchers and water managers

Author:
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 558

View

Book Description

Author: Richard Escadafal
Publisher: IRD Orstom
ISBN:
Category : Geographic information systems
Languages : fr
Pages : 674

View

Book Description
ISSS congress remote sensing

Author: Food and Agriculture Organization of the United Nations. Land and Water Development Division
Publisher: Food & Agriculture Org.
ISBN: 9789251034293
Category : Technology & Engineering
Languages : en
Pages : 136

View

Book Description

Author: Jean Goubault-Larrecq
Publisher: Springer Science & Business Media
ISBN: 9781402003684
Category : Computers
Languages : en
Pages : 448

View

Book Description
Interest in computer applications has led to a new attitude to applied logic in which researchers tailor a logic in the same way they define a computer language. In response to this attitude, this text for undergraduate and graduate students discusses major algorithmic methodologies, and tableaux and resolution methods. The authors focus on first-order logic, the use of proof theory, and the computer application of automated searches for proofs of mathematical propositions. Annotation copyrighted by Book News, Inc., Portland, OR

Author: John Bridge
Publisher: Cambridge University Press
ISBN: 0521857805
Category : Science
Languages : en
Pages : 0

View

Book Description
A unique, advanced textbook combining sedimentology and geomorphology in a comprehensive and integrated way.

Author: Helene Joffe
Publisher: Springer Science & Business Media
ISBN: 9400761848
Category : Nature
Languages : en
Pages : 195

View

Book Description
With the major growth of the world’s population over the past century, as well as rapid urbanisation, people increasingly live in crowded cities. This trend is often accompanied by proliferation of poorly built housing, uncontrolled use of land, occupation of unsafe environments and overstretched services. When a natural hazard strikes such a city many people are vulnerable to loss of life and property. This book explores what these people think and feel about the threats that they face. How do they live with perils ranging from earthquakes to monsoons, from floods to hurricanes, in the 21st century? The authors are drawn from a large range of disciplines: Psychology, Engineering, Geography, Anthropology and Urban Planning. They also reflect on how perils are represented in multiple cultures: the United States, Japan, Turkey, Bangladesh, the United Kingdom and New Zealand. The book therefore not only brings to light the ways that different cultures represent natural hazards but also the different ways in which various disciplines write about living with perils in the 21st century. The book is addressed both to researchers and to organizations involved with risk management and risk mitigation.