نتایج جستجو برای: threshold detector

تعداد نتایج: 178905  

2009
Mohamed Elgendi Mirjam Jonkman Friso De Boer Charles Darwin

The accurate detection of QRS complexes is important for ECG signal analysis. This paper presents an improved version of a QRS detector based on an adaptive quantized threshold. The algorithm achieves high detection rates by using automatic thresholds instead of predetermined static thresholds. We improved the number of detected QRS in non-stationary random arrhythmic ECG signals by applying a ...

Journal: :Graphical Models and Image Processing 1998
Michael H. F. Wilkinson

The Robust Automatic Threshold Selection algorithm was introduced as a threshold selection based on a simple image statistic. The statistic is an average of the grey levels of the pixels in an image weighted by the response at each pixel of a specific edge detector. Other authors have suggested that many edge detectors may be used within the context of this method instead. A simple proof of thi...

2003
Michael H. F. Wilkinson

A multi-scale, moving-window method for local thresholding based on Robust Automatic Threshold Selection (RATS) is developed. Using a model for the noise response of the optimal edge detector in this context, the reliability of thresholds computed at di erent scales is determined. The threshold computed at the smallest scale at which the reliability is su cient is used. The performance on 2-D i...

Journal: :Physical review letters 2009
B Aubert Y Karyotakis J P Lees V Poireau E Prencipe X Prudent V Tisserand J Garra Tico E Grauges M Martinelli A Palano M Pappagallo G Eigen B Stugu L Sun M Battaglia D N Brown B Hooberman L T Kerth Yu G Kolomensky G Lynch I L Osipenkov K Tackmann T Tanabe C M Hawkes N Soni A T Watson H Koch T Schroeder D J Asgeirsson C Hearty T S Mattison J A McKenna M Barrett A Khan A Randle-Conde V E Blinov A D Bukin A R Buzykaev V P Druzhinin V B Golubev A P Onuchin S I Serednyakov Yu I Skovpen E P Solodov K Yu Todyshev M Bondioli S Curry I Eschrich D Kirkby A J Lankford P Lund M Mandelkern E C Martin D P Stoker H Atmacan J W Gary F Liu O Long G M Vitug Z Yasin V Sharma C Campagnari T M Hong D Kovalskyi M A Mazur J D Richman T W Beck A M Eisner C A Heusch J Kroseberg W S Lockman A J Martinez T Schalk B A Schumm A Seiden L Wang L O Winstrom C H Cheng D A Doll B Echenard F Fang D G Hitlin I Narsky P Ongmongkolkul T Piatenko F C Porter R Andreassen G Mancinelli B T Meadows K Mishra M D Sokoloff P C Bloom W T Ford A Gaz J F Hirschauer M Nagel U Nauenberg J G Smith S R Wagner R Ayad W H Toki E Feltresi A Hauke H Jasper T M Karbach J Merkel A Petzold B Spaan K Wacker M J Kobel R Nogowski K R Schubert R Schwierz D Bernard E Latour M Verderi P J Clark S Playfer J E Watson M Andreotti D Bettoni C Bozzi R Calabrese A Cecchi G Cibinetto E Fioravanti P Franchini E Luppi M Munerato M Negrini A Petrella L Piemontese V Santoro R Baldini-Ferroli A Calcaterra R de Sangro G Finocchiaro S Pacetti P Patteri I M Peruzzi M Piccolo M Rama A Zallo R Contri E Guido M Lo Vetere M R Monge S Passaggio C Patrignani E Robutti S Tosi M Morii A Adametz J Marks S Schenk U Uwer F U Bernlochner H M Lacker T Lueck A Volk P D Dauncey M Tibbetts P K Behera M J Charles U Mallik J Cochran H B Crawley L Dong V Eyges W T Meyer S Prell E I Rosenberg A E Rubin Y Y Gao A V Gritsan Z J Guo N Arnaud A D'Orazio M Davier D Derkach J Firmino da Costa G Grosdidier F Le Diberder V Lepeltier A M Lutz B Malaescu P Roudeau M H Schune J Serrano V Sordini A Stocchi L L Wang G Wormser D J Lange D M Wright I Bingham J P Burke C A Chavez J R Fry E Gabathuler R Gamet D E Hutchcroft D J Payne C Touramanis A J Bevan C K Clarke F Di Lodovico R Sacco M Sigamani G Cowan S Paramesvaran A C Wren C L Davis M Fritsch W Gradl A Hafner K E Alwyn D Bailey R J Barlow G Jackson G D Lafferty T J West J I Yi J Anderson C Chen A Jawahery D A Roberts G Simi J M Tuggle C Dallapiccola E Salvati R Cowan D Dujmic P H Fisher S W Henderson G Sciolla M Spitznagel R K Yamamoto M Zhao P M Patel S H Robertson M Schram P Biassoni A Lazzaro V Lombardo F Palombo S Stracka L Cremaldi R Godang R Kroeger P Sonnek D J Summers H W Zhao X Nguyen M Simard P Taras H Nicholson G De Nardo L Lista D Monorchio G Onorato C Sciacca G Raven H L Snoek C P Jessop K J Knoepfel J M LoSecco W F Wang L A Corwin K Honscheid H Kagan R Kass J P Morris A M Rahimi S J Sekula N L Blount J Brau R Frey O Igonkina J A Kolb M Lu R Rahmat N B Sinev D Strom J Strube E Torrence G Castelli N Gagliardi M Margoni M Morandin M Posocco M Rotondo F Simonetto R Stroili C Voci P del Amo Sanchez E Ben-Haim G R Bonneaud H Briand J Chauveau O Hamon Ph Leruste G Marchiori J Ocariz A Perez J Prendki S Sitt L Gladney M Biasini E Manoni C Angelini G Batignani S Bettarini G Calderini M Carpinelli A Cervelli F Forti M A Giorgi A Lusiani M Morganti N Neri E Paoloni G Rizzo J J Walsh D Lopes Pegna C Lu J Olsen A J S Smith A V Telnov F Anulli E Baracchini G Cavoto R Faccini F Ferrarotto F Ferroni M Gaspero P D Jackson L Li Gioi M A Mazzoni S Morganti G Piredda F Renga C Voena M Ebert T Hartmann H Schröder R Waldi T Adye B Franek E O Olaiya F F Wilson S Emery L Esteve G Hamel de Monchenault W Kozanecki G Vasseur Ch Yèche M Zito M T Allen D Aston D J Bard R Bartoldus J F Benitez R Cenci J P Coleman M R Convery J C Dingfelder J Dorfan G P Dubois-Felsmann W Dunwoodie R C Field M Franco Sevilla B G Fulsom A M Gabareen M T Graham P Grenier C Hast W R Innes J Kaminski M H Kelsey H Kim P Kim M L Kocian D W G S Leith S Li B Lindquist S Luitz V Luth H L Lynch D B MacFarlane H Marsiske R Messner D R Muller H Neal S Nelson C P O'Grady I Ofte M Perl B N Ratcliff A Roodman A A Salnikov R H Schindler J Schwiening A Snyder D Su M K Sullivan K Suzuki S K Swain J M Thompson J Va'vra A P Wagner M Weaver C A West W J Wisniewski M Wittgen D H Wright H W Wulsin A K Yarritu C C Young V Ziegler X R Chen H Liu W Park M V Purohit R M White J R Wilson M Bellis P R Burchat A J Edwards T S Miyashita S Ahmed M S Alam J A Ernst B Pan M A Saeed S B Zain A Soffer S M Spanier B J Wogsland R Eckmann J L Ritchie A M Ruland C J Schilling R F Schwitters B C Wray B W Drummond J M Izen X C Lou F Bianchi D Gamba M Pelliccioni M Bomben L Bosisio C Cartaro G Della Ricca L Lanceri L Vitale V Azzolini N Lopez-March F Martinez-Vidal D A Milanes A Oyanguren J Albert Sw Banerjee B Bhuyan H H F Choi K Hamano G J King R Kowalewski M J Lewczuk I M Nugent J M Roney R J Sobie T J Gershon P F Harrison J Ilic T E Latham G B Mohanty E M T Puccio H R Band X Chen S Dasu K T Flood Y Pan R Prepost C O Vuosalo S L Wu

A precise measurement of the cross section of the process e(+)e(-) --> pi(+)pi(-)(gamma) from threshold to an energy of 3 GeV is obtained with the initial state radiation (ISR) method using 232 fb(-1) of data collected with the BABAR detector at e(+)e(-) center-of-mass energies near 10.6 GeV. The ISR luminosity is determined from a study of the leptonic process e(+)e(-) --> mu(+)mu(-)gamma(gamm...

2000
H. T. Mouftah K. C. Smith Z. G. Vranesic

The application of COS/MOS integrated circuits in the construction of a three-valued positional control system is presented. A unit-distance ternary code and the design of a ternary encoder are given. A ternary code converter able to translate this unit-distance code to the signed ternary code is described. A ternary threshold level detector is required to convert a noisy, slowly-changing, anal...

2016
H. R. Archana

This paper presents edge detection using the Sobel compass edge detector where four processing elements are arranged in parallel to get the edge detected values in different directions of compass to get a accurate edge detected image. The edge detection is done in four stages which include buffer memory, four processing elements, maximum gradient unit and edge map which is designed in verilog a...

Journal: :IEEE Journal on Selected Areas in Communications 1997
Narayan B. Mandayam Behnaam Aazhang

In this sequel, we develop infinitesimal perturbation analysis (IPA)-based stochastic gradient algorithms for deriving optimum detectors with the average probability of bit error being the objective function that is minimized. Specifically, we develop both a class of linear as well as nonlinear (threshold) detectors. In the linear scheme, the receiver despreads the received optical signal with ...

Journal: :Dynamic Games and Applications 2021

Abstract We study a dynamic information design problem in finite-horizon setting consisting of two strategic and long-term optimizing agents, namely principal (he) detector (she). The observes the evolution Markov chain that has states, one “good” “bad” absorbing state, to decide how sequentially disclose detector. detector’s only consists messages she receives from principal. objective is dete...

Journal: :Automatica 2021

We study how to design a secure observer-based distributed controller such that group of vehicles can achieve accurate state estimates and formation control even if the measurements subset vehicle sensors are compromised by malicious attacker. propose an architecture consisting resilient observer, attack detector, controller. The detector is able update three sets sensors: ones surely under att...

Journal: :Journal of Instrumentation 2021

This article describes the design, assembly and characterization of a portable cosmic ray detector, developed by INSULAB group suitable for teaching activities aimed at high school students. It consists compact aluminum suitcase containing three plastic scintillator modules coupled to photomultipliers, readout custom electronics chain powered power bank. The operate in coincidence system record...

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