Sökning: "high order"

Visar resultat 16 - 20 av 6305 avhandlingar innehållade orden high order.

1. 16. Second-generation High-Order Harmonic Sources — From CPA to OPCPA

   Författare :Piotr Rudawski; Atomfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Optical parametric chirped pulse amplification; Fysicumarkivet A:2014:Rudawski; Chirped pulse amplification; High-order harmonic generation; Attosecond pulse;

   Sammanfattning : This thesis presents two sources of extreme ultraviolet (XUV) radiation based on high-order harmonic generation (HHG) in gases. The sources were developed for experiments requiring high-flux harmonic beams or HHG pulses at high-repetition rate. These were used experimentally to image nano-scale objects. LÄS MER

3. 17. High frequency electronic packaging : SBU-materials, material characterization, simulation and processing

   Författare :Christian Johansson; Hjalmar Hesselbom; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; dielectric loss; high frequency electrical characterization; microwave circuits; multilayer thin film technology; ORMOCER; permittivity; sequential build up; silicone elastomer;

   Sammanfattning : Electronic packaging continues to move towards improved performance and lower cost. Requirements of higher performance, reduced size, weight and cost of both High Density Interconnects (HDI) and high frequency (HF) devices has led to the search for new: materials, material combinations, methods, processes and production equipment. LÄS MER

4. 18. Financial systems and the financing of high-technology small firms : The cases of Sweden, Linköping, and Santa Clara County

   Författare :Marcus Zackrisson; Hans Sjögren; Linköpings universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Innovation; High-technology; Venture capital; Banks; Small firms; Financial systems; Pecking order; Debt Equity ratio; Exit; Småföretag; Finansiering; Sverige; Förenta Staterna; INTERDISCIPLINARY RESEARCH AREAS; TVÄRVETENSKAPLIGA FORSKNINGSOMRÅDEN;

   Sammanfattning : This is a study of the relation between the financial systems and the financing of hightechnology small firms (HTSFs). The starting point is the notion of two different financial systems: bank-oriented, in which banks (debt) and other financial intermediaries play an important role in the financing of firms, and market-oriented, where the role of banks is less important and stock markets (equity) play a larger role. LÄS MER

5. 19. High Repetition Rate Laser Diagnostics for Combustion Applications

   Författare :Johan Sjöholm; Förbränningsfysik; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; spray; diesel; optical engine; simultaneous; laser-induced fluorescence; fuel tracer; SLIPI; Raman; LII; laser diagnostic; combustion; high repetition rate; high-speed; PLIF; multi-YAG; LIF; fuel jet; Fysicumarkivet A:2012:Sjöholm;

   Sammanfattning : High repetition rate laser diagnostics has proven to be a useful tool for studying combustion phenomena. Laser techniques are, in general, relatively non-intrusive and have the potential to measure specific species at very low concentrations and with extremely high temporal resolution. LÄS MER

7. 20. Perfectly Matched Layers and High Order Difference Methods for Wave Equations

   Författare :Kenneth Duru; Gunilla Kreiss; Jan Nordsröm; Ken Mattsson; Marcus Grote; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Elastic waves; Surface waves; Perfectly matched layers; High order difference methods; Stability; Summation-by-parts operators; Boundary treatments; Beräkningsvetenskap med inriktning mot numerisk analys; Scientific Computing with specialization in Numerical Analysis;

   Sammanfattning : The perfectly matched layer (PML) is a novel technique to simulate the absorption of waves in unbounded domains. The underlying equations are often a system of second order hyperbolic partial differential equations. In the numerical treatment, second order systems are often rewritten and solved as first order systems. LÄS MER