Browsing by Author "Petrova V."

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    Distributed Nonlinear Model Predictive Control by Sequential Linearization and Accelerated Gradient Method
    (2016-01-01) Grancharova A.; Johansen T.A.; Petrova V.
    A suboptimal approach to distributed NMPC for nonlinear interconnected systems subject to constraints is proposed. The objective is to develop a computationally efficient approach. The suggested method is based on a sequential linearization of the nonlinear system dynamics and finding a suboptimal solution of the resulting Quadratic Programming problem by using distributed iterations of the dual accelerated gradient method. The benefits of the approach are reduced complexity of the on-line computations, and simple software implementation, which makes it appropriate for embedded distributed convex NMPC. The proposed method is illustrated with simulations on the model of a quadruple-tank system.
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    The genomic history of southeastern Europe
    (2018-03-08) Mathieson I.; Alpaslan-Roodenberg S.; Posth C.; Szécsényi-Nagy A.; Rohland N.; Mallick S.; Olalde I.; Broomandkhoshbacht N.; Candilio F.; Cheronet O.; Fernandes D.; Ferry M.; Gamarra B.; Fortes G.G.; Haak W.; Harney E.; Jones E.; Keating D.; Krause-Kyora B.; Kucukkalipci I.; Michel M.; Mittnik A.; Nägele K.; Novak M.; Oppenheimer J.; Patterson N.; Pfrengle S.; Sirak K.; Stewardson K.; Vai S.; Alexandrov S.; Alt K.W.; Andreescu R.; Antonović D.; Ash A.; Atanassova N.; Bacvarov K.; Gusztáv M.B.; Bocherens H.; Bolus M.; Boroneanţ A.; Boyadzhiev Y.; Budnik A.; Burmaz J.; Chohadzhiev S.; Conard N.J.; Cottiaux R.; Čuka M.; Cupillard C.; Drucker D.G.; Elenski N.; Francken M.; Galabova B.; Ganetsovski G.; Gély B.; Hajdu T.; Handzhyiska V.; Harvati K.; Higham T.; Iliev S.; Janković I.; Karavanić I.; Kennett D.J.; Komšo D.; Kozak A.; Labuda D.; Lari M.; Lazar C.; Leppek M.; Leshtakov K.; Vetro D.L.; Los D.; Lozanov I.; Malina M.; Martini F.; McSweeney K.; Meller H.; Mentušić M.; Mirea P.; Moiseyev V.; Petrova V.; Douglas Price T.; Simalcsik A.; Sineo L.; Šlaus M.; Slavchev V.; Stanev P.; Starović A.; Szeniczey T.; Talamo S.; Teschler-Nicola M.; Thevenet C.; Valchev I.; Valentin F.; Vasilyev S.; Veljanovska F.; Venelinova S.; Veselovskaya E.; Viola B.; Virag C.; Zaninović J.; Zaüner S.; Stockhammer P.W.; Catalano G.; Krauß R.; Caramelli D.; Zariną G.; Gaydarska B.; Lillie M.; Nikitin A.G.; Potekhina I.; Papathanasiou A.; Borić D.; Bonsall C.; Krause J.; Pinhasi R.; Reich D.
    Farming was first introduced to Europe in the mid-seventh millennium bc, and was associated with migrants from Anatolia who settled in the southeast before spreading throughout Europe. Here, to understand the dynamics of this process, we analysed genome-wide ancient DNA data from 225 individuals who lived in southeastern Europe and surrounding regions between 12000 and 500 bc. We document a west-east cline of ancestry in indigenous hunter-gatherers and, in eastern Europe, the early stages in the formation of Bronze Age steppe ancestry. We show that the first farmers of northern and western Europe dispersed through southeastern Europe with limited hunter-gatherer admixture, but that some early groups in the southeast mixed extensively with hunter-gatherers without the sex-biased admixture that prevailed later in the north and west. We also show that southeastern Europe continued to be a nexus between east and west after the arrival of farmers, with intermittent genetic contact with steppe populations occurring up to 2,000 years earlier than the migrations from the steppe that ultimately replaced much of the population of northern Europe.