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Category :
Languages : fr
Pages : 210
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Book Description
Cette thèse est une contribution aux études sur la disponibilité des dispositifs électrotechnique. L'étude présentée propose des solutions aux problèmes de detection des défauts dans les entraînements électriques continu et alternatif en utilisant des méthodes de connaissances et de modélisation de signaux. Les défauts considérés sont ceux de l'alimentation, du convertisseur, des capteurs et de la machine. Pour les défauts affectant l'entraînement continu, La méthode retenue se base sur une analyse de la répercution des défauts sur les grandeurs accessibles (relations de causes a effets) et utilisé le symbolisme des arbres de défaillances. Pour l'entraînement alternatif diverses approches utilisant la connaissance du système électrotechnique ont été proposées pour determiner des symptomes temporels (suivi de la trajectoire ou de la fréquence instantanée du vecteur courant, modèles du courant absorbé). Une caractérisation fréquentielle des défauts affectant l'entraînement a été réalisé dans les domaines basses fréquences (les fondamentaux et ses multiples) et hautes fréquences (évolution de la fréquence de modulation). Les diverses approches ont toutes été validés expérimentalement.
Author:
Publisher:
ISBN:
Category :
Languages : fr
Pages : 210
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Book Description
Cette thèse est une contribution aux études sur la disponibilité des dispositifs électrotechnique. L'étude présentée propose des solutions aux problèmes de detection des défauts dans les entraînements électriques continu et alternatif en utilisant des méthodes de connaissances et de modélisation de signaux. Les défauts considérés sont ceux de l'alimentation, du convertisseur, des capteurs et de la machine. Pour les défauts affectant l'entraînement continu, La méthode retenue se base sur une analyse de la répercution des défauts sur les grandeurs accessibles (relations de causes a effets) et utilisé le symbolisme des arbres de défaillances. Pour l'entraînement alternatif diverses approches utilisant la connaissance du système électrotechnique ont été proposées pour determiner des symptomes temporels (suivi de la trajectoire ou de la fréquence instantanée du vecteur courant, modèles du courant absorbé). Une caractérisation fréquentielle des défauts affectant l'entraînement a été réalisé dans les domaines basses fréquences (les fondamentaux et ses multiples) et hautes fréquences (évolution de la fréquence de modulation). Les diverses approches ont toutes été validés expérimentalement.
Author: UNESCO
Publisher: UNESCO Publishing
ISBN: 9231003550
Category :
Languages : en
Pages : 112
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Book Description
Author: H. R. Sasse
Publisher: Springer
ISBN:
Category : Science
Languages : en
Pages : 792
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Book Description
Preface Adhesion is a phenomenon architects and civil engineers are not very familiar with. In other disciplines knowledge about surface properties and the background of bonding energies is also far from satisfactory; nevertheless there are many important· applications in concrete engineering, where adhesion is necessary for success and durability. These include: - coating and painting - repair of concrete surfaces - bonding of fresh to old concrete - crack injection - glueing of precast elements - glueing of steel to concrete, etc. In 1981 RILEM established the technical committee 52-RAC 'Resin Adherence to Concrete'. The main aims of the committee's work were - to collect research results and practical experiences - to initiate and coordinate research programs - to develop, on a scientific base, test methods for field and for laboratory purposes. One of the results of the committee's work is a state-of-the-art report, which will be presented orally as a General Report at the International Symposium ISAP '86, and will be printed either in the RILEM journal Materials and Structures or separately. Several test recommendations have been elaborated and will be prepared as drafts for the participants ofISAP '86. These are: - direct tensile test - pull-off test - direct shear test - slant shear test - four-point bending test - dynamic loading test - thermal compatibility test (two versions) - injectibility test.
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Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 692
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Book Description
Author: Linda Strande
Publisher: IWA Publishing
ISBN: 1780404735
Category : Technology & Engineering
Languages : en
Pages : 428
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Book Description
It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Author: Renate Mayntz
Publisher: Routledge
ISBN: 1000315878
Category : Social Science
Languages : en
Pages : 238
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Book Description
This book is an outcome of the conference on the development of large technical systems held in Berlin in 1986. It focuses on the comparative analysis of the development of large technical systems, particularly electrical power, railroad, air traffic, telephone, and other forms of telecommunication.
Author: Dennis van der Veur
Publisher: Council of Europe
ISBN: 9789287163936
Category : Political Science
Languages : en
Pages : 180
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Book Description
"'Gender Matters' is a manual aimed to assist educators and youth leaders work on issues of gender and gender-based violence with young people. This publication presents theoretical information, methods and resources for education and training activities, along with concrete exercises that users can put into practice in their daily work. Violence is a serious issue which directly affects the lives of many young people. It often results in lasting damage to their well-being and integrity, putting even their lives at risk. Gender-based violence, including violence against women, remains a key human rights challenge in contemporary Europe and in the world. Working with young people on human rights education is one way of preventing gender-based violence from occurring. By raising awareness on why and how it manifests and exploring its impact on people and in society, gender-based violence will no longer go undetected. Gender really does matter, to women, to men, to young people - to all of us. This manual serves to explore these human rights issues and act upon them."--Book jacket.
Author: Liisa North
Publisher: Between The Lines
ISBN: 1897071108
Category : Corporations, Canadian
Languages : en
Pages : 264
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Book Description
Canadian mining activity in Latin America has exploded over the past decade and a half. Investors have responded to neoliberal policies of deregulation, privatization, state-downsizing, and export promotion encouraged by leading capitalist nations and international financial institutions such as the International Monetary Fund and the World Bank. The result, predictably, has been sharp conflicts between the communities affected by mining and their advocates on one side, and the transnational mining companies supported by the local state and the Canadian government on the other. This collection, the most comprehensive in the English-language to date, investigates these conflicts in Bolivia, Chile, Colombia, Ecuador, Peru, Mexico, and Nicaragua. Contributors address the related sustainable development, community, corporate, legal, and social issues. A valuable contribution to Latin American development studies, this collection will prove of interest to students and specialists in the field, journalists, NGOs, and policymakers.
Author: Robert G. Arno
Publisher:
ISBN:
Category : Reliability (Engineering)
Languages : en
Pages : 276
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Book Description
This report, organized in four major sections, presents reliability information based on field operation, dormant state and test data for more than 250 major nonelectronic part types. The four sections are Generic Data, Detailed Data, Application Data, and failure Modes and Mechanisms. Each device type contains reliability information in relation to the specific operational environments. (Author).
Author: Frances Lynch
Publisher: Routledge
ISBN: 1134766742
Category : Foreign Language Study
Languages : en
Pages : 334
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Book Description
This is a comprehensive history of a critically formative period in French economic history. Frances Lynch covers topics such as the post-war negotiations for American aid, the reconstruction of a capital market, the modernization of French agriculture, the liberalization of trade in the 1950s and subsequent economic growth.
