• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 630
  • 221
  • 152
  • 47
  • 37
  • 30
  • 23
  • 20
  • 16
  • 5
  • 5
  • 5
  • 5
  • 5
  • 5
  • Tagged with
  • 1429
  • 178
  • 178
  • 129
  • 117
  • 112
  • 108
  • 102
  • 91
  • 91
  • 87
  • 82
  • 81
  • 73
  • 72
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.

Forecasting oil and gas reserves and production in the UK North Sea : a Monte Carlo approach

Hatami, Hossein January 1996 (has links)
This thesis examines the results of the future exploration drilling activities expected to be committed between 1995-2014 in the mature areas of the UK North Sea. The study employs Monte Carlo simulation techniques to quantify the risk of exploration ventures by estimating the expected value of the exploration decisions in a mature hydrocarbon province where both the exploration success and the size of the discovered fields are shown to be diminishing with advancing exploration. The study explicitly takes into account the risks which are associated with both geological and economic uncertainties. The prime objective is to model and forecast the significant quantities of oil, condensate, and gas to be discovered given the specified levels of committed exploratory effort. Due to the presence of different geological and prospectivity characteristics, the whole North Sea province is divided into three basins namely the Southern, Central and Northern basins each of which has been treated and studied separately. The commercial merits of the future discoveries for potential development purposes have been determined through the application of different parameters for future oil and gas prices, various costs of field exploration and development, etc. The impact of the fiscal regime on the commercial viability of the future discoveries has also been explicitly examined. After identifying the future discoveries with commercial significance in the North Sea, their resulting production, costs, revenues, tax bill, and the net present values are presented in detail. To create a wider picture for the new field discoveries and their eventual contribution to the overall production in the North Sea, the future exploration and production activities have been examined under three different scenarios each reflecting varying geological and economic circumstances.

Extensions et nouvelles approches en extraction des connaissances à partir des données réduction unidimensionnelle et bidimensionnelle d'un tableau numérique, arbres de décision et introduction de coûts en apprentissage, sélection de variables /

Erray, Walid. Zighed, Djamel Abdelkader January 2006 (has links)
Thèse doctorat : Informatique : Lyon 2 : 2006. / Titre provenant de l'écran-titre. Bibliogr.

Apprentissage non supervisé et extraction de connaissances à partir de données

Jouve, Pierre-Emmanuel Nicoloyannis, Nicolas January 2003 (has links)
Reproduction de : Thèse de doctorat : Informatique : Lyon 2 : 2003. / Titre provenant de l'écran-titre. Bibliogr.

Contribution méthodologique à la fouille de données complexes

Clech, Jérémie Zighed, Djamel Abdelkader January 2004 (has links)
Reproduction de : Thèse de doctorat : Informatique : Lyon 2 : 2004. / Titre provenant de l'écran-titre. Bibliogr.

Krise Shell - Bewertung vom Rohstoffvorkommen Die Rechnungslegung von Aktivitäten der Explorationsphase bei Rohstoffproduzenten /

Wagner, Sascha Benjamin. January 2005 (has links) (PDF)
Bachelor-Arbeit Univ. St. Gallen, 2005.

Réalité augmentée haptique : théorie et applications / Haptics augmented reality : theory and applications

Bayart, Benjamin 07 December 2007 (has links)
Dans cette thèse, nous introduisons le concept de Réalité Augmentée Haptique (RAH) en définissant une taxonomie à deux axes. Le premier dénommé Haptique Augmentée (HA) représente l’ensemble des applications qui modifient/augmentent une donnée haptique existante. Le second axe, appelé Augmentation Haptique (AH), considère les applications qui utilisent la modalité haptique pour fournir une information supplémentaire à l’utilisateur. Par la suite, nous illustrons ces concepts sous forme d’une application de télé-diagnostic, permettant l’exploration d’un objet mixte, composé de parties réelles et virtuelles, ou la comparaison entre un objet réel et un virtuel ; d’un nouvel algorithme pour l’enseignement d’un chemin par guidage haptique, tout en évitant les problèmes de passivité et de dépendance de l’apprenti ; et de l’emploi de ces deux notions dans une application de peinture virtuelle sur un quelconque objet réel (avec croisement d’augmentations visio-haptique), le tout enrichi d’un processus visuel de Réalité Diminuée. / This thesis introduces the concept of Haptics Augmented Reality (HAR) defining a taxonomy of two concepts. The first called Enhanced Haptics (EH) consists in applications that enhance/modify/… an existing haptic data. The second concept, named Haptic Enhancing (HE), considers applications using the haptic channel to provide additional information to the user. Thereafter, these concepts are illustrated as a tele-diagnosis application, enabling the exploration of a mixed object, composed of real and virtual parts, or the comparison between a real object and a virtual one; as a new algorithm of haptic guidance dedicated to path teaching scenarios, avoiding the problems of passivity and dependence of he apprentice; and the use of these two concepts within a application of virtual painting onto any real object, enriched with a visual Diminished Reality process.

Exploratory learning of interactive devices : what people do and what people learn

Cox, Anna Louise January 2002 (has links)
No description available.

Development and application of inductively coupled plasma-mass spectrometry for the analysis of metals in sedimentary organic matter

Olsen, Samuel Dagfinn January 1996 (has links)
No description available.

Reservoir diagenesis in the Junggar Basin, northwest China

Tang, Zhaohui January 1994 (has links)
No description available.

Thermal emission from the nightside of Venus

Collard, Andrew D. January 1993 (has links)
No description available.

Page generated in 0.0966 seconds