Sökning: "Optimization Methods"

Visar resultat 1 - 5 av 1243 avhandlingar innehållade orden Optimization Methods.

1. 1. Νοήμονες υπολογιστικές μέθοδοι εμπνευσμένες από τον φυσικό κόσμο για την βελτιστοποίηση συστημάτων : αλγόριθμος βελτιστοποίησης εμπνευσμένης από τον ηχοεντοπισμό

   Författare :Alexandros Tzanetos; Economics and Administration Department of Engineering Polytechnic School; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nature Inspired Intelligent Algorithms; Nature Inspired Intelligence; Optimization; Νοήμονες Αλγόριθμοι Εμπνευσμένοι από τη Φύση; Νοημοσύνη Εμπνευσμένη από τη Φύση; Βελτιστοποίηση;

   Sammanfattning : Η εποχή που διανύουμε φέρνει στο προσκήνιο την Τεχνητή Νοημοσύνη, καθότι διάφοροι κλάδοι ενσωματώνουν εντυπωσιακές εφαρμογές της. Πολλές αναφορές γίνονται στην 4η Βιομηχανική Επανάσταση, η οποία έχει πλέον την Τεχνητή Νοημοσύνη ως κύριο πυλώνα της. LÄS MER

3. 2. Production scheduling and shipment planning at oil refineries : optimization based methods

   Författare :Jan A. Persson; Bjørn Nygreen; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : In the oil refinery industry, companies need to have a high utilization of production, storage, and transportation resources to be competitive. This can only be achieved by proper planning The purpose of this thesis is to contribute to the development of optimization models and solution methods that support the scheduling and planning at refinery companies. LÄS MER

4. 3. Simultaneous Topology and Material Optimization of Composite Structures under Uncertainty

   Författare :Dženan Hozić; Carl-Johan Thore; François-Xavier Irisarri; Linköpings universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Structural Optimization; Composite Structures; Topology Optimization; Multi-material Optimization; Material Uncertainty; Robust Optimization; Composite Structure Optimization; Design Optimization; Composite Material;

   Sammanfattning : Composite materials are known to have superior stiffness and strength properties per unit weight compared to metallic materials. These properties and the ability to tailor the mechanical properties of composites is the main motivation for choosing composite materials for structural components. LÄS MER

5. 4. Mean-Variance Portfolio Optimization : Eigendecomposition-Based Methods

   Författare :Fred Mayambala; Torbjörn Larsson; Elina Rönnberg; Juma Kasozi; Ann-Brith Strömberg; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : Modern portfolio theory is about determining how to distribute capital among available securities such that, for a given level of risk, the expected return is maximized, or for a given level of return, the associated risk is minimized. In the pioneering work of Markowitz in 1952, variance was used as a measure of risk, which gave rise to the wellknown mean-variance portfolio optimization model. LÄS MER

7. 5. Scalable Optimization Methods for Machine Learning : Acceleration, Adaptivity and Structured Non-Convexity

   Författare :Vien Van Mai; Mikael Johansson; John Duchi; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Large-scale optimization; Anderson acceleration; first-order methods; stochastic optimization; momentum; gradient clipping; Electrical Engineering; Elektro- och systemteknik;

   Sammanfattning : This thesis aims at developing efficient optimization algorithms for solving large-scale machine learning problems. To cope with the increasing scale and complexity of such models, we focus on first-order and stochastic methods in which updates are carried out using only (noisy) information about function values and (sub)gradients. LÄS MER