Search for dissertations about: "stochastic model"

Showing result 21 - 25 of 632 swedish dissertations containing the words stochastic model.

  2. 21. Noise improves cognitive performance in children with dysfunctional neurotransmission

    Author : Göran Söderlund; Sverker Sikström; Lars-Göran Nilsson; Edmund Sonuga-Barke; Stockholms universitet; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; ADHD; noise; stochastic resonance; dopamine; episodic memory; model; brain arousal; SPT; cognitive performance; children; Psychology; Psykologi; psykologi; Psychology;

    Abstract : Research on children with Attention Deficit Hyperactivity Disorder (ADHD) has shown that they are extremely sensitive to distraction from external stimuli that lead to poor cognitive performance. This thesis shows that cognitive performance can be improved if this external stimulus is smooth and continuous (e.g. auditory white noise). READ MORE

  4. 22. Stability and control of shear flows subject to stochastic excitations

    Author : Jérôme Hoepffner; Dan Henningson; John Burns; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; control; estimation; stochastic excitations; feedback; model reduction; Fluid mechanics; Strömningsmekanik;

    Abstract : In this thesis, we adapt and apply methods from linear control theory to shear flows. The challenge of this task is to build a linear dynamic system that models the evolution of the flow, using the Navier--Stokes equations, then to define sensors and actuators, that can sense the flow state and affect its evolution. READ MORE

  5. 23. Modeling pooling and perishable items in inventory systems

    Author : Patrik Tydesjö; Produktionsekonomi; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; two level; perishable items; Inventory control; newsboy model; emergency supply; stochastic; lateral transshipments; upstream customer demand.;

    Abstract : This thesis is built on three papers considering different problems in inventory control. The first paper considers a two-location newsboy model with the possibility of making lateral transshipments when needed. Usually, when considering newsboy models it is assumed that all demand in a period occurs at once. READ MORE

  6. 24. Stochastic Reactor Models for Engine Simulations

    Author : Martin Tunér; Förbränningsmotorer; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; SRM; Stochastic Reactor Model; Engine Simulation; Chemical kinetics; HCCI; Direct injection; Combustion; NVO; Modeling; PDF;

    Abstract : The aim of the thesis work is the further development of practical engine simulation tools based on Stochastic Reactor Models, SRMs. Novel and efficient implementations were made of a variety of SRMs adapted to different engine types. The models in question are the HCCI-SRM, the TwoZone SI-SRM and the DI-SRM. READ MORE

  7. 25. Software Investments under Uncertainty : Modeling Intangible Consequences as a Stochastic Process

    Author : Emil Numminen; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Software investment valuation; usage; intangible consequences; cash flow; discounted cash flow model; stochastic process;

    Abstract : Software systems are today a part of more or less every organization. The varieties of software used in organizations are ranging from simple log-keeping applications to advanced decision support systems. The task of a priori valuation of software investments has attracted a lot of research for a long time. READ MORE