نتایج جستجو برای: point sources

تعداد نتایج: 793665  

Journal: :Communications in Mathematical Sciences 2023

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2016
Mankei Tsang

Lord Rayleigh suggested in 1879 that two incoherent optical point sources should be separated by a diffraction-limited spot size for them to be resolved [1]. This criterion has since become the most influential measure of imaging resolution. Under the modern advent of rigorous statistics and image processing, Rayleigh’s criterion remains a curse. When the image is noisy, necessarily so owing to...

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Journal: :Water science and technology : a journal of the International Association on Water Pollution Research 2005
M Biegel J Schanze P Krebs

The new model ArcEGMO-URBAN aims at deterministic and spatiotemporal modelling of water, nitrogen and phosphorus fluxes from all urbanised areas of a river basin considering all potential sources. Pollution loads are calculated for discrete urban patches and balanced on the level of hydrological subbasins. Modelling results can be defined by the user of any level of spatial and/or temporal aggr...

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Journal: :Physical review letters 2004
J Ahrens X Bai S W Barwick T Becka J K Becker E Bernardini D Bertrand F Binon A Biron D J Boersma S Böser O Botner A Bouchta O Bouhali T Burgess S Carius T Castermans A Chen D Chirkin B Collin J Conrad J Cooley D F Cowen A Davour C De Clercq T DeYoung P Desiati J P Dewulf P Ekström T Feser T K Gaisser R Ganugapati M Gaug H Geenen L Gerhardt A Goldschmidt A Gross A Hallgren F Halzen K Hanson R Hardtke T Harenberg T Hauschildt K Helbing M Hellwig P Herquet G C Hill D Hubert B Hughey P O Hulth K Hultqvist S Hundertmark J Jacobsen A Karle M Kestel L Köpke M Kowalski K Kuehn J I Lamoureux H Leich M Leuthold P Lindahl I Liubarsky J Madsen K Mandli P Marciniewski H S Matis C P McParland T Messarius Y Minaeva P Miocinović R Morse K Münich R Nahnhauer T Neunhöffer P Niessen D R Nygren H Ogelman Ph Olbrechts C Pérez de los Heros A C Pohl R Porrata P B Price G T Przybylski K Rawlins E Resconi W Rhode M Ribordy S Richter J Rodríguez Martino H G Sander K Schinarakis S Schlenstedt T Schmidt D Schneider R Schwarz A Silvestri M Solarz G M Spiczak C Spiering M Stamatikos D Steele P Steffen R G Stokstad K H Sulanke I Taboada L Thollander S Tilav W Wagner C Walck Y R Wang C H Wiebusch C Wiedemann R Wischnewski H Wissing K Woschnagg G Yodh

We present the results of a search for point sources of high-energy neutrinos in the northern hemisphere using AMANDA-II data collected in the year 2000. Included are flux limits on several active-galactic-nuclei blazars, microquasars, magnetars, and other candidate neutrino sources. A search for excesses above a random background of cosmic-ray-induced atmospheric neutrinos and misreconstructed...

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2011
D. Menzies

A preliminary investigation is presented of horizontal sound field control using a rectangular array of spherical wave driving sources, with focus on wide area plane wave reproduction. Comparison is made between Wave Field Synthesis and a method based on distributed pressure and velocity constraints. Advantages of the second approach are discussed, and modifications of the both methods are prop...

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2002
Tom Abel Benjamin D. Wandelt

We describe a novel adaptive ray tracing scheme to solve the equation of radiative transfer around point sources in hydrodynamical simulations. The angular resolution adapts to the local hydrodynamical resolution and hence is of use for adaptive meshes as well as adaptive smooth particle hydrodynamical simulations. Recursive creation of rays ensures ease of implementation. The multiple radial i...

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Journal: :Environment International 1986

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Journal: :Monthly Notices of the Royal Astronomical Society 2017

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Journal: :MRS Bulletin 2014

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Journal: :Astronomy & Astrophysics 2015

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  • " +i+ "
    • "; pgn_html+=pgn_li; } document.getElementById("pgn-ul").innerHTML=pgn_html var pgn_links = document.querySelectorAll('.mypgn'); pgn_links.forEach(function(pgn_link) { pgn_link.addEventListener('click', paginate) }) } function post_and_fetch(data,url) { showLoading() xhr = new XMLHttpRequest(); xhr.open('POST', url, true); xhr.setRequestHeader('Content-Type', 'application/json; charset=UTF-8'); xhr.onreadystatechange = function() { if (xhr.readyState === 4 && xhr.status === 200) { var resp = xhr.responseText; resp_json=JSON.parse(resp) resp_place = document.getElementById("search_result_div") resp_place.innerHTML = resp_json['results'] search_meta = resp_json['meta'] update_search_meta(search_meta) update_pagination() hideLoading() } }; xhr.send(JSON.stringify(data)); } function unfilter() { url=/search_year_filter/ var term=document.getElementById("search_meta_data").dataset.term var data={ "year":"unfilter", "term":term, "pgn":1 } filtered_res=post_and_fetch(data,url) } function deactivate_all_bars(){ var yrchart = document.querySelectorAll('.ct-bar'); yrchart.forEach(function(bar) { bar.dataset.active = false bar.style = "stroke:#71a3c5;" }) } year_chart.on("created", function() { var yrchart = document.querySelectorAll('.ct-bar'); yrchart.forEach(function(check) { check.addEventListener('click', checkIndex); }) }); function checkIndex(event) { var yrchart = document.querySelectorAll('.ct-bar'); var year_bar = event.target if (year_bar.dataset.active == "true") { unfilter_res = unfilter() year_bar.dataset.active = false year_bar.style = "stroke:#1d2b3699;" } else { deactivate_all_bars() year_bar.dataset.active = true year_bar.style = "stroke:#e56f6f;" filter_year = chart_data['labels'][Array.from(yrchart).indexOf(year_bar)] url=/search_year_filter/ var term=document.getElementById("search_meta_data").dataset.term var data={ "year":filter_year, "term":term, "pgn":1 } filtered_res=post_and_fetch(data,url) } } function showLoading() { document.getElementById("loading").style.display = "block"; setTimeout(hideLoading, 10000); // 10 seconds } function hideLoading() { document.getElementById("loading").style.display = "none"; } -->