Sökning: "weak section"

Visar resultat 11 - 15 av 37 avhandlingar innehållade orden weak section.

1. 11. Interference Alignment with Imperfect Channel Knowledge and Secrecy Constraints

   Författare :Zhao Wang; Mikael Skoglund; Ming Xiao; Sheng Yang; KTH; []
   Nyckelord :Informations- och kommunikationsteknik; Information and Communication Technology;

   Sammanfattning : In this thesis, the degrees of freedom (DOF) of wireless networks are studied with imperfect channel state information at transmitters (CSIT) and/or secrecy constraints. Different interference alignment schemes are proposed to establish the DOF lower bound for a variety of wireless networks. LÄS MER

3. 12. Continuum modeling of the mechanical properties of paperboard

   Författare :Eric Borgqvist; Hållfasthetslära; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; director vectors; polyconvexity; plastic spin; creasing; anisotropy; fiberous materials; Continuum Modeling; Paperboard;

   Sammanfattning : Continuum based elasto-plastic models for paperboard have been established in the work herein. The thesis begins with an introductory section that describes some of the background of the problem and gives some more motivation for the modeling choices made in the appended papers. LÄS MER

4. 13. A Search for Dark Matter Lines with H.E.S.S. II

   Författare :Knut Dundas Morå; Jan Conrad; Christian Farnier; Christian Walck; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Dark Matter; Cherenkov Telescopes; Indirect Detection; fysik; Physics;

   Sammanfattning : Most of the matter in the universe, ~80% is thought to be dark matter- particles that have small or no interactions with standard model particles. Dark matter is an integral part of the current understanding of cosmology, and leaves signs in the movements of stars and galaxies, as well as the Cosmic Microwave Background. LÄS MER

5. 14. Reliability Evaluation of Distribution Systems Considering Failure Modes and Network Configuration

   Författare :Sajeesh Babu; Patrik Hilber; Chanan Singh; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Sammanfattning : Power distribution networks are recognized as the constituent part of power systems with the highest concentration of failure events. Even though the faults in distribution networks have a local effect when compared to the generation and transmission sides, major contingency escalation events are being more frequently reported from this section. LÄS MER

7. 15. Carbon Nanotubes for Electronic Packaging: Growth, Novel Devices and 3D Networks

   Författare :Yifeng Fu; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; multi-scale modeling; electrospinning; microfin; PDMS; chemical vapor deposition CVD ; Carbon nanotube CNT ; double-walled CNT DWNT ; CNT covalent bonding; CNT transfer; thermal management; packaging;

   Sammanfattning : Carbon nanotubes (CNTs) have shown great potential of application in electronics because of their attractive physical properties, such as high surface-to-volume ratio, high electron mobility, high Young’s modulus, high thermal conductivity, low thermal expansion coefficient, etc. However, many obstacles are yet to be removed to use CNTs as building blocks in electronic systems. LÄS MER