1,726,316 research outputs found
Reconstructing initial data using observers: error analysis of the semi-discrete and fully discrete approximations
Full text linkA new iterative algorithm for solving initial data inverse problems from partial observations has been recently proposed in Ramdani et al. (Automatica 46(10), 1616-1625, 2010 ). Based on the concept of observers (also called Luenberger observers), this algorithm covers a large class of abstract evolution PDE's. In this paper, we are concerned with the convergence analysis of this algorithm. More precisely, we provide a complete numerical analysis for semi-discrete (in space) and fully discrete approximations derived using finite elements in space and an implicit Euler method in time. The analysis is carried out for abstract Schrödinger and wave conservative systems with bounded observation (locally distributed)
Reconstructing initial data using iterative observers for wave type systems. A numerical analysis
Full text linkA new iterative algorithm for solving initial data inverse problems from partial observations has been recently Proposed in Ramdani et al. (Automatica 46(10), 1616–1625, 2010). Based on the concept of observers (also called Luenberger observers), this algorithm covers a large class of abstract evolution PDE’s. In this paper, we are concerned with the convergence analysis of this algorithm. More precisely, we provide a complete numerical analysis for semi-discrete (in space) and fully discrete approximations derived using finite elements in space and an implicit Euler method in time. The analysis is carried out for abstract Schrödinger and wave conservative systems with bounded observation (locally distributed)
Reconstructing initial data using iterative observers for wave type systems
Full text linkAn iterative algorithm for solving initial data inverse problems from partial observations has been proposed in 2010 by Ramdani, Tucsnak and Weiss (Automatica, 2010). In this work, we are concerned with the convergence of this algorithm when the inverse problem is ill-posed, i.e. when the observations are not sufficient to reconstruct any initial data. We prove that the state space can be decomposed as a direct sum, stable by the algorithm, corresponding to the observable and unobservable part of the initial data. We show that this result holds for both locally distributed and boundary observation
Conversation about cookies business
No full textThis is a recording of two men, Burhanuddin and Ramdani at Mahyuddin's house. Burhanuddin is 46 years old and married to a woman from Pondok Prasi. He was formerly married to a woman from Praya, Central Lombok. He works as house constructor. Ramdani is a 20 year old man.He is the son of Burhanuddin from his first marriage. So, Ramdani was born in Praya but followed his dad since high school. He sells cookies at the market. The owner of the house where they are recorded is still their relative. They are talking about selling cookies for Eid. The recording ends with Khairunnisa collecting metadata from the speakers. Leah Pappas assisted with the recording. Video was recorded on Panasonic HC-V770, audio on Marantz PMD561 with an Audio Technica AT8022 Stereo Microphone.Ampenan, Lombok, West Nusa Tenggara province, Indonesi
RAMDANI, Fatma (Université Paris 13)
No full textNOM : RAMDANI Prénom : Fatma Établissement : Université Paris 13 UFR/Département - laboratoire/équipe de recherche : Laboratoire Pléiade Statut : MCF Coordonnées professionnelles postales : N.R. Téléphone : 06.29.63.43.45 M@il : ramdanifat @ hotmail.com Adresse.s URL de votre page institutionnelle : http://www.univ-paris13.fr/pleiade/) ou http://www.univ-paris13.fr/pleiade/membres-titulaires/ Thématique.s de recherche : - Mouvements féministes américains et Afro-américains. - Mouvements fémin..
Ramdani Setiyariski's Quick Files
No full textThe Quick Files feature was discontinued and it’s files were migrated into this Project on March 11, 2022. The file URL’s will still resolve properly, and the Quick Files logs are available in the Project’s Recent Activity
2D near-surface seismic data from the Late Jurassic Upper Jubaila Fm outcrop - Wadi Laban, Central Saudi Arabia
No full textTwo lines of 2D seismic data were recorded in January 2018 from the Late Jurassic (Late Kimmeridgian) Jubaila Fm outcrop – Wadi Laban, Central Saudi Arabia. The main objective of this dataset is to complement near-surface well logs with meter-scale geophysical images for multi-scale geophysical characterization analog of microporous carbonate in the Jubaila Fm. The length of each line is 600 m. The survey consists of 120 shots with a ~5 m shot interval. The receivers are 120 vertical P-wave geophones with a ~5 m interval planted directly on hard limestone rock by hand drills. The seismic source is a 750 kg accelerated weight drop mounted on a 6 × 6 All-Terrain Vehicle. The recording length for all lines was 600 ms with a 0.5 ms sampling interval. The data is sorted as shot gather in SEGY format with the receiver and shot coordinates provided as Excel spreadsheets. A pdf file summarizing the processing steps and one example of the processed line in SEGY format is provided as an example
Flood validation
No full textThis data derived from Instagram social media during the large area flood event of Barito Watershed, South Kalimantan, Indonesi
Egyptian Women in the 1919 Revolution: Political awakening to Nationalist feminism
No full textLSE’s Nabila Ramdani looks at the role women played in that revolution and sees parallels with the women’s movement in Egypt today
- …
