Sökning: "high order methods"

Visar resultat 36 - 40 av 2011 avhandlingar innehållade orden high order methods.

1. 36. Visual replenishment methods in the manufacturing industry and suggestion for a decision tool

   Författare :Stefan Eriksson; Lars Bengtsson; Mauro Onori; Peter Gröndahl; Stig-Arne Mattsson; Högskolan i Gävle; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; materials supply; replenishment methods; visual; selecting methods; decision tool;

   Sammanfattning : In almost all supply chains, materials need to be stored or buffered, implying that manufacturing companies need effective replenishment methods. However, this is challenging, since companies must balance inventory costs and customer service in complex and different situations. Therefore, it is important to choose replenishment methods carefully. LÄS MER

3. 37. Finite Difference Methods for Wave Dominated Problems

   Författare :Jonatan Werpers; Ken Mattsson; Anders Petersson; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Finite difference; summation-by-parts; simultaneous approximation term; high-order accuracy; stability; boundary treatment; Beräkningsvetenskap med inriktning mot numerisk analys; Scientific Computing with specialization in Numerical Analysis;

   Sammanfattning : Wave models are an important class of models that describe many diverse phenomena such as sound waves, fluid flow, and quantum mechanics. These models are often described mathematically as partial differential equations (PDE). Often these equations do not admit solutions on closed-form and then the only option to study them is numerical methods. LÄS MER

4. 38. Efficient and Flexible First-Order Optimization Algorithms

   Författare :Hamed Sadeghi; Institutionen för reglerteknik; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Monotone Inclusion; Convex Optimization; First-Order Methods; Fixed-Point Iterations; Forward–Backward Splitting; Primal–Dual Algorithm;

   Sammanfattning : Optimization problems occur in many areas in science and engineering. When the optimization problem at hand is of large-scale, the computational cost of the optimization algorithm is a main concern. LÄS MER

5. 39. Segmentation Methods for Medical Image Analysis : Blood vessels, multi-scale filtering and level set methods

   Författare :Gunnar Läthén; Reiner Lenz; Niels Christian Overgaard; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Image segmentation; Medical image analysis; Level set method; Quadrature filter; Multi-scale; Image analysis; Bildanalys;

   Sammanfattning : Image segmentation is the problem of partitioning an image into meaningful parts, often consisting of an object and background. As an important part of many imaging applications, e.g. face recognition, tracking of moving cars and people etc, it is of general interest to design robust and fast segmentation algorithms. LÄS MER

7. 40. Fast Adaptive Numerical Methods for High Frequency Waves and Interface Tracking

   Författare :Jelena Popovic; Olof Runborg; Hongkai Zhao; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; high frequency waves; Helmholtz equation; interface tracking; time-space adaptivity; multiresolution; Hamilton-Jacobi;

   Sammanfattning : The main focus of this thesis is on fast numerical methods, where adaptivity is an important mechanism to lowering the methods' complexity. The application of the methods are in the areas of wireless communication, antenna design, radar signature computation, noise prediction, medical ultrasonography, crystal growth, flame propagation, wave propagation, seismology, geometrical optics and image processing. LÄS MER