Tableur | EPFL Graph Search

Êtes-vous un étudiant de l'EPFL à la recherche d'un projet de semestre?

Travaillez avec nous sur des projets en science des données et en visualisation, et déployez votre projet sous forme d'application sur GraphSearch.

Découvrez-en plus sur les applications Graph.

vignette|350x350px|LibreOffice Calc 6.2 Un tableur est un programme informatique capable de manipuler des feuilles de calcul. À l'origine destinés au traitement automatisé des données financières, les logiciels tableurs sont maintenant utilisés pour effectuer des tâches variées, de la gestion de bases de données simples à la production de graphiques (on peut alors parler de tableur-grapheur), en passant par diverses analyses statistiques. Le tableur est, dans les organisations, le principal outil de développement d'applications par l'utilisateur-final. De la feuille de calcul au tableur Une feuille de calcul est une table (ou grille) d'informations de toutes natures (données industrielles, scientifiques, commerciales, comptables, financières, statistiques, données de métiers, etc.). D'une manière générale, toute problématique, pouvant être disposée en lignes et colonnes, éventuellement sur plusieurs plans, impliquant ou n'impliquant pas des calculs, rend le tableur perti

À propos de ce résultat

Cette page est générée automatiquement et peut contenir des informations qui ne sont pas correctes, complètes, à jour ou pertinentes par rapport à votre recherche. Il en va de même pour toutes les autres pages de ce site. Veillez à vérifier les informations auprès des sources officielles de l'EPFL.

Publications associées

Chargement

Personnes associées

Chargement

Unités associées

Chargement

Concepts associés

Chargement

Cours associés

Chargement

Séances de cours associées

Chargement

Résumé

Source officielle

À propos de ce résultat

Publications associées (5)

Publications associées

Chargement

Personnes associées

Chargement

Unités associées

Chargement

Concepts associés (53)

Concepts associés

Chargement

Cours associés (25)

Cours associés

Chargement

Séances de cours associées (44)

Séances de cours associées

Chargement

Energy Savings for Cellular Network with Evaluation of Impact on Data Traffic Performance

Jean-Yves Le Boudec, Byongkwon Moon

We present a concrete methodology for saving energy in future and contemporary cellular networks. It is based on re-arranging the user-cell association so as to allow shutting down under-utilized parts of the network. We consider a hypothetical static case where we have complete knowledge of stationary user locations and thus the results represent an upper bound of potential energy savings. We formulate the problem as a binary integer programming problem, thus it is NP-hard, and we present a heuristic approximation method. We simulate the methodology on an example real cellular network topology with traffic- and user distribution generated according to recently measured patterns. Further, we evaluate the energy savings, using realistic energy profiles, and the impact on the user-perceived network performance, represented by delay and throughput, at various times of day. The general findings conclude that up to 50% energy may be saved in less busy periods, while the performance effects remain limited. We conclude that practical, real-time user-cell re-allocation methodology, taking into account user mobility predictions, may thus be feasible and bring significant energy savings at acceptable performance impact.

2010

Chargement

A spreadsheet framework for medical visualization

Sofiane Sarni

The goal of this research work is to investigate and develop a framework for medical visualization, answering the needs of both end users (clinicians), working in their specific domain, and application designers, who build applications and visualizations for them. Most flexible visualization systems currently available are based on the dataflow paradigm. Dataflow-based systems suffer from a poor management of the screen real estate, which is a problem for end users. In order to deal with this problem, spreadsheet-based visualization systems –which are a generalization of conventional spreadsheets– were introduced. In comparison with dataflow-based visualization systems, spreadsheet based systems spend their screen space on operands rather than operators, which are usually more interesting to the user. We proposed a spreadsheetbased framework for interactive medical visualization. This framework is analyzed with regard to its usability and validated with concrete medical use cases. We have also investigated specific visualization methods and interaction techniques to answer the needs of clinicians. We used a multilevel color-mapping of scalar values on models of organ for effectively comparing bones even if the data set contain errors. We proposed also a method for organizing high-dimensional data sets that are difficult to explore on a two dimensional layout. A haptic rendering application is also presented for investigating the use of haptics for providing the clinicians with tools that allow them to "touch" and "feel" the virtually simulated tissues in addition to their visual rendering.

EPFL2006

Chargement

A spreadsheet framework for visual exploration of biomedical datasets

Ronan Boulic, Anderson Maciel, Sofiane Sarni, Daniel Thalmann

In this paper, we present our spreadsheet framework, which uses a spreadsheet-like interface for exploring biomedical datasets. The principles and advantages of this class of visualization systems are illustrated, and a case study for the analysis of hip joint congruity is presented. Throughout this use case, we see how end users can compare different datasets, apply parallel operations on data, create analysis templates, and how this helps them in the exploration process.

2005

Chargement

Microsoft Excel

Microsoft Excel est un logiciel tableur de la suite bureautique Microsoft Office développé et distribué par l'éditeur Microsoft. La version la plus récente est Excel 2021. Il est destiné à fonctionne

Microsoft Office

Microsoft Office est une suite bureautique propriété de la société Microsoft qui fonctionne avec les plates-formes fixes et mobiles. Elle s'installe sur ordinateur et fournit une suite de logiciels co

Application (informatique)

Une application, un applicatif ou encore une appli, une app est, dans le domaine informatique, un programme (ou un ensemble logiciel) directement utilisé pour réaliser une tâche, ou un ensemble de t

CS-550: Formal verification

We introduce formal verification as an approach for developing highly reliable systems. Formal verification finds proofs that computer systems work under all relevant scenarios. We will learn how to use formal verification tools and explain the theory and the practice behind them.

MGT-413: Entrepreneurship & new venture strategy

A foundational course on the science and practice of launching new ventures. The purpose is to study and experience the first stages of the entrepreneurial process: from the identification of promising opportunities to the development of a viable and innovative business concept.

PHYS-201(d): General physics: electromagnetism

The topics covered by the course are concepts of fluid mechanics, waves, and electromagnetism.