Sökning: "Computer-aided design modeling"

Visar resultat 16 - 20 av 21 avhandlingar innehållade orden Computer-aided design modeling.

1. 16. Theoretical studies on photophysics and photochemistry of DNA

   Författare :Yuejie Ai; Yi Luo; Lluís Blancafort; KTH; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Quantum chemistry; Kvantkemi; SRA - Molecular Bioscience; SRA - Molekylär biovetenskap;

   Sammanfattning : Theoretical studies on biological systems like nucleic acid and protein have been widely developed in the past 50 years and will continue to be a topic of interest in forefronts of natural science. In addition to experimental science, computational modeling can give useful information and help us to understand biochemical issues at molecular, atomic and even electronic levels. LÄS MER

3. 17. Optimization of LDMOS Transistor in Power Amplifiers for Communication Systems

   Författare :Ahsan-Ullah Kashif; Qamar-ul Wahab; Christer Svensson; Joachim Wurfl; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; RF-LDMOS; power amplifiers; technology CAD; load-pull; non-linear analysis; and switching analysis; Semiconductor physics; Halvledarfysik;

   Sammanfattning : The emergence of new communication standards has put a key challenge for semiconductor industry to develop RF devices that can handle high power and high data rates simultaneously. The RF devices play a key role in the design of power amplifiers (PAs), which is considered as a heart of base-station. LÄS MER

4. 18. Advancing Front Mesh Generation Techniques with Application to the Finite Element Method

   Författare :Jan Frykestig; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; advancing front method; mesh size distribution; automatic mesh generation; finite element method; surface mesh generation; spatial data structures;

   Sammanfattning : The present study deals with automatic mesh generation with application to finite element methods. We focus our interest on unstructured mesh generation, and in particular on advancing front methods for which algorithms for meshing of two and three dimensional domains as well as of free-form surfaces are devised. LÄS MER

5. 19. A multivariate approach to characterization of drug-like molecules, proteins and the interactions between them

   Författare :Anton Lindström; Anna Linusson; Fredrik Almqvist; Anders Karlén; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; binding affinity; prediction; CAMD; principal component analysis PCA ; partial least squares projections to latent structures PLS ; MM-GB-SA; MM-PB-SA; docking; geometry optimization; protein secondary structure characterization; implicit solvent; generalized-Born; Poisson-Boltzmann; molecular mechanics MM ; drug discovery; bindningsaffinitet; prediktion; dockning; geometrioptimering; sekundärstruktur; matematisk vattenmodel; generalized-Born; Poisson-Boltzmann; molekylmekanik MM ; läkemedelsdesign; principal komponent analys PCA ; partial least squares projections to latent structures PLS ; MM-GB-SA; MM-PB-SA; Other chemistry; Övrig kemi;

   Sammanfattning : En sjukdom kan många gånger härledas till en kaskadereaktion mellan proteiner, co-faktorer och substrat. Denna kaskadreaktion blir många gånger målet för att behandla sjukdomen med läkemedel. För att designa nya läkemedelsmoleyler används vanligen datorbaserade verktyg. LÄS MER

7. 20. On determining lost core viability in high-pressure die casting using Computational Continuum Mechanics

   Författare :Sebastian Kohlstädt; Pär Jönsson; Julio Hernandez; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high-pressure die casting; lost salt cores; computational continuum mechanics; two-phase compressible flow; OpenFOAM; CFD; fluid-structure interaction; volume-of-fluid method;

   Sammanfattning : The subject of this thesis work is to investigate whether Computational ContinuumMechanics (CCM) can serve as a valuable tool for the casting engineerto determine a priori whether a housing concept with inlying geometries thatso far only exists in Computer Aided Design (CAD) will have the desired coolingperformance and will be manufacturable with an acceptable number ofrejects.As of spring 2019, no application in serial production of lost cores, i. LÄS MER