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X-WR-CALNAME:Institute of Mathematics and Informatics
X-ORIGINAL-URL:https://math.bas.bg
X-WR-CALDESC:Събития за Institute of Mathematics and Informatics
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DTSTART:20240331T010000
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BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20241022T140000
DTEND;TZID=Europe/Sofia:20241022T153000
DTSTAMP:20260405T143255
CREATED:20241015T211136Z
LAST-MODIFIED:20241015T211136Z
UID:16891-1729605600-1729611000@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 22 октомври (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nAsymptotic covariance matrix of Capon’s Maximum likelihood estimator and application of steered response power phase alignment algorithm in seismic array data processing – част 2\nще изнесе Александр Варипаев от секция ИОСВ. \n\nАбстракт: Capon’s estimator was originally developed for frequency-wavenumber power spectral density analysis. Theoretically\, it can be treated as maximum likelihood estimator of unknown vector parameter of multidimensional linear system (MLS) model with one input and m outputs.  Practically important and non-trivial case is considered\, when the number of nuisance parameters\, which are values of input deterministic signal\, tends to infinity. Under assumptions that MLS output signals distorted by random Gaussian stationary  EMBED Equation.DSMT4 -dimensional noise with known matrix power spectrum and the likelihood function of observations satisfies the conditions of local asymptotic normality\, the analytical form of limiting covariance matrix of the Capon’s estimate is given.Steered response power phase alignment algorithm (SRP-PHAT) is devoted to subclass of so called phase-based robust estimators. Mathematical basis of SRP-PHAT estimator shows its applicability to small-aperture seismic array data to solve two different tasks: frequency-wavenumber analyses and seismic source localization problems. Several experiments with real data demonstrate its advantage compared to conventional methods that are involved in most of free and commercial seismological software.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d0%b8%d0%b7%d1%81%d0%bb%d0%b5%d0%b4%d0%b2%d0%b0%d0%bd%d0%b5-%d0%bd%d0%b0-%d0%be%d0%bf%d0%b5%d1%80%d0%b0%d1%86%d0%b8%d0%b8%d1%82%d0%b5-7/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%A1%D0%B5%D0%BA%D1%86%D0%B8%D1%8F%20%D0%98%D0%B7%D1%81%D0%BB%D0%B5%D0%B4%D0%B2%D0%B0%D0%BD%D0%B5%20%D0%BD%D0%B0%20%D0%BE%D0%BF%D0%B5%D1%80%D0%B0%D1%86%D0%B8%D0%B8%D1%82%D0%B5%2C%20%D0%B2%D0%B5%D1%80%D0%BE%D1%8F%D1%82%D0%BD%D0%BE%D1%81%D1%82%D0%B8%20%D0%B8%20%D1%81%D1%82%D0%B0%D1%82%D0%B8%D1%81%D1%82%D0%B8%D0%BA%D0%B0":MAILTO:jeni@math.bas.bg;
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20241015T140000
DTEND;TZID=Europe/Sofia:20241015T153000
DTSTAMP:20260405T143255
CREATED:20241009T142051Z
LAST-MODIFIED:20241009T142051Z
UID:16881-1729000800-1729006200@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 15 октомври (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nAsymptotic covariance matrix of Capon’s Maximum likelihood estimator and application of steered response power phase alignment algorithm in seismic array data processing\nще изнесе Александр Варипаев от секция ИОСВ. \nАбстракт: Capon’s estimator was originally developed for frequency-wavenumber power spectral density analysis. Theoretically\, it can be treated as maximum likelihood estimator of unknown vector parameter of multidimensional linear system (MLS) model with one input and m outputs.  Practically important and non-trivial case is considered\, when the number of nuisance parameters\, which are values of input deterministic signal\, tends to infinity. Under assumptions that MLS output signals distorted by random Gaussian stationary  EMBED Equation.DSMT4 -dimensional noise with known matrix power spectrum and the likelihood function of observations satisfies the conditions of local asymptotic normality\, the analytical form of limiting covariance matrix of the Capon’s estimate is given.Steered response power phase alignment algorithm (SRP-PHAT) is devoted to subclass of so called phase-based robust estimators. Mathematical basis of SRP-PHAT estimator shows its applicability to small-aperture seismic array data to solve two different tasks: frequency-wavenumber analyses and seismic source localization problems. Several experiments with real data demonstrate its advantage compared to conventional methods that are involved in most of free and commercial seismological software.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d0%b8%d0%b7%d1%81%d0%bb%d0%b5%d0%b4%d0%b2%d0%b0%d0%bd%d0%b5-%d0%bd%d0%b0-%d0%be%d0%bf%d0%b5%d1%80%d0%b0%d1%86%d0%b8%d0%b8%d1%82%d0%b5-6/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%A1%D0%B5%D0%BA%D1%86%D0%B8%D1%8F%20%D0%98%D0%B7%D1%81%D0%BB%D0%B5%D0%B4%D0%B2%D0%B0%D0%BD%D0%B5%20%D0%BD%D0%B0%20%D0%BE%D0%BF%D0%B5%D1%80%D0%B0%D1%86%D0%B8%D0%B8%D1%82%D0%B5%2C%20%D0%B2%D0%B5%D1%80%D0%BE%D1%8F%D1%82%D0%BD%D0%BE%D1%81%D1%82%D0%B8%20%D0%B8%20%D1%81%D1%82%D0%B0%D1%82%D0%B8%D1%81%D1%82%D0%B8%D0%BA%D0%B0":MAILTO:jeni@math.bas.bg;
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20241009T140000
DTEND;TZID=Europe/Sofia:20241009T153000
DTSTAMP:20260405T143255
CREATED:20241002T105535Z
LAST-MODIFIED:20241003T174002Z
UID:16822-1728482400-1728487800@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 9 октомври (сряда) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nGraphs as an universal modeling tool\, част 2\nще изнесе проф. Никола Янев\, ИМИ-БАН. \nАбстракт: For a series of practical optimization problems\, we show that formulating them as graph optimization problems enables the development of competitive algorithms. The problems considered are known as: protein threading problem\, contact map overlap\, HP folding\, a new scheduling theory problem\, classification problem and the biclustering problem. The focus is on formulating them as graph optimization problems\, which are solved by using Integer programming techniques.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d0%b8%d0%b7%d1%81%d0%bb%d0%b5%d0%b4%d0%b2%d0%b0%d0%bd%d0%b5-%d0%bd%d0%b0-%d0%be%d0%bf%d0%b5%d1%80%d0%b0%d1%86%d0%b8%d0%b8%d1%82%d0%b5-5/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%A1%D0%B5%D0%BA%D1%86%D0%B8%D1%8F%20%D0%98%D0%B7%D1%81%D0%BB%D0%B5%D0%B4%D0%B2%D0%B0%D0%BD%D0%B5%20%D0%BD%D0%B0%20%D0%BE%D0%BF%D0%B5%D1%80%D0%B0%D1%86%D0%B8%D0%B8%D1%82%D0%B5%2C%20%D0%B2%D0%B5%D1%80%D0%BE%D1%8F%D1%82%D0%BD%D0%BE%D1%81%D1%82%D0%B8%20%D0%B8%20%D1%81%D1%82%D0%B0%D1%82%D0%B8%D1%81%D1%82%D0%B8%D0%BA%D0%B0":MAILTO:jeni@math.bas.bg;
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20241001T140000
DTEND;TZID=Europe/Sofia:20241001T153000
DTSTAMP:20260405T143255
CREATED:20240926T125611Z
LAST-MODIFIED:20240926T125611Z
UID:16794-1727791200-1727796600@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 1 октомври (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nGraphs as an universal modeling tool\nще изнесе проф. Никола Янев\, ИМИ-БАН. \nАбстракт: For a series of practical optimization problems\, we show that formulating them as graph optimization problems enables the development of competitive algorithms. The problems considered are known as: protein threading problem\, contact map overlap\, HP folding\, a new scheduling theory problem\, classification problem and the biclustering problem. The focus is on formulating them as graph optimization problems\, which are solved by using Integer programming techniques.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d0%b8%d0%b7%d1%81%d0%bb%d0%b5%d0%b4%d0%b2%d0%b0%d0%bd%d0%b5-%d0%bd%d0%b0-%d0%be%d0%bf%d0%b5%d1%80%d0%b0%d1%86%d0%b8%d0%b8%d1%82%d0%b5-4/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%A1%D0%B5%D0%BA%D1%86%D0%B8%D1%8F%20%D0%98%D0%B7%D1%81%D0%BB%D0%B5%D0%B4%D0%B2%D0%B0%D0%BD%D0%B5%20%D0%BD%D0%B0%20%D0%BE%D0%BF%D0%B5%D1%80%D0%B0%D1%86%D0%B8%D0%B8%D1%82%D0%B5%2C%20%D0%B2%D0%B5%D1%80%D0%BE%D1%8F%D1%82%D0%BD%D0%BE%D1%81%D1%82%D0%B8%20%D0%B8%20%D1%81%D1%82%D0%B0%D1%82%D0%B8%D1%81%D1%82%D0%B8%D0%BA%D0%B0":MAILTO:jeni@math.bas.bg;
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240702T140000
DTEND;TZID=Europe/Sofia:20240702T153000
DTSTAMP:20260405T143255
CREATED:20240629T132516Z
LAST-MODIFIED:20240629T132516Z
UID:16477-1719928800-1719934200@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 2-ри юли (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nOn some contemporary mathematical methods for data analysis\nще изнесе проф. Пандо Георгиев\, ИМИ-БАН. \nАбстракт:\n\nWe will review some selected methods and algorithms for data analysis:\nA) Latent component analysis – reveals hidden features of composite data. Particularly\, we will describe some\n    Signal Separation Methods:\n\nbased on statistical independence – Independent Component Analysis\nbased on sparsity. – Sparse Component Analysis\nbased on non-negativity – Non-Negative Matrix and Tensor Factorization\n\nB) New approach to multiclass learning problems and applications to some problems in machine learning\, as:\n\nnonlinear least square problems\nsubspace clustering and non-linear skeletons\nreconstruction of several functions from mixed samples\nsupport vector kernel regression (under development)\n\nC) kernel methods for data analysis\nD) tensor decompositions  and tensor networks.\nSome of the above topics are interconnected and subject to intensive development with numerous applications.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d0%b8%d0%b7%d1%81%d0%bb%d0%b5%d0%b4%d0%b2%d0%b0%d0%bd%d0%b5-%d0%bd%d0%b0-%d0%be%d0%bf%d0%b5%d1%80%d0%b0%d1%86%d0%b8%d0%b8%d1%82%d0%b5-3/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%A1%D0%B5%D0%BA%D1%86%D0%B8%D1%8F%20%D0%98%D0%B7%D1%81%D0%BB%D0%B5%D0%B4%D0%B2%D0%B0%D0%BD%D0%B5%20%D0%BD%D0%B0%20%D0%BE%D0%BF%D0%B5%D1%80%D0%B0%D1%86%D0%B8%D0%B8%D1%82%D0%B5%2C%20%D0%B2%D0%B5%D1%80%D0%BE%D1%8F%D1%82%D0%BD%D0%BE%D1%81%D1%82%D0%B8%20%D0%B8%20%D1%81%D1%82%D0%B0%D1%82%D0%B8%D1%81%D1%82%D0%B8%D0%BA%D0%B0":MAILTO:jeni@math.bas.bg;
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240618T140000
DTEND;TZID=Europe/Sofia:20240618T153000
DTSTAMP:20260405T143255
CREATED:20240612T172158Z
LAST-MODIFIED:20240612T172158Z
UID:16441-1718719200-1718724600@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 18-ти юни (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nMathematical modelling of torque-velocity and torque-angle relationships – part 2: numerical results\nще изнесе проф. Петър Миланов\, ИМИ-БАН и ЮЗУ.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d0%b8%d0%b7%d1%81%d0%bb%d0%b5%d0%b4%d0%b2%d0%b0%d0%bd%d0%b5-%d0%bd%d0%b0-%d0%be%d0%bf%d0%b5%d1%80%d0%b0%d1%86%d0%b8%d0%b8%d1%82%d0%b5-2/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%A1%D0%B5%D0%BA%D1%86%D0%B8%D1%8F%20%D0%98%D0%B7%D1%81%D0%BB%D0%B5%D0%B4%D0%B2%D0%B0%D0%BD%D0%B5%20%D0%BD%D0%B0%20%D0%BE%D0%BF%D0%B5%D1%80%D0%B0%D1%86%D0%B8%D0%B8%D1%82%D0%B5%2C%20%D0%B2%D0%B5%D1%80%D0%BE%D1%8F%D1%82%D0%BD%D0%BE%D1%81%D1%82%D0%B8%20%D0%B8%20%D1%81%D1%82%D0%B0%D1%82%D0%B8%D1%81%D1%82%D0%B8%D0%BA%D0%B0":MAILTO:jeni@math.bas.bg;
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Sofia:20240611T140000
DTEND;TZID=Europe/Sofia:20240611T153000
DTSTAMP:20260405T143255
CREATED:20240605T202851Z
LAST-MODIFIED:20240605T202851Z
UID:16406-1718114400-1718119800@math.bas.bg
SUMMARY:Семинар по изследване на операциите
DESCRIPTION:На 11-ти юни (вторник) от 14:00 ч. в зала 503 на ИМИ ще се състои сбирка на\nСеминара по Изследване на операциите. \nДоклад на тема \nMathematical modelling of torque-velocity and torque-angle relationships\nще изнесе проф. Петър Миланов\, ИМИ-БАН и ЮЗУ.
URL:https://math.bas.bg/event/%d1%81%d0%b5%d0%bc%d0%b8%d0%bd%d0%b0%d1%80-%d0%bf%d0%be-%d0%b8%d0%b7%d1%81%d0%bb%d0%b5%d0%b4%d0%b2%d0%b0%d0%bd%d0%b5-%d0%bd%d0%b0-%d0%be%d0%bf%d0%b5%d1%80%d0%b0%d1%86%d0%b8%d0%b8%d1%82%d0%b5/
LOCATION:Институт по математика и информатика – БАН\, Block 8\, 1113 БАН IV км.\, София\, Bulgaria
CATEGORIES:Редовен семинар
ORGANIZER;CN="%D0%A1%D0%B5%D0%BA%D1%86%D0%B8%D1%8F%20%D0%98%D0%B7%D1%81%D0%BB%D0%B5%D0%B4%D0%B2%D0%B0%D0%BD%D0%B5%20%D0%BD%D0%B0%20%D0%BE%D0%BF%D0%B5%D1%80%D0%B0%D1%86%D0%B8%D0%B8%D1%82%D0%B5%2C%20%D0%B2%D0%B5%D1%80%D0%BE%D1%8F%D1%82%D0%BD%D0%BE%D1%81%D1%82%D0%B8%20%D0%B8%20%D1%81%D1%82%D0%B0%D1%82%D0%B8%D1%81%D1%82%D0%B8%D0%BA%D0%B0":MAILTO:jeni@math.bas.bg;
END:VEVENT
END:VCALENDAR