Search for dissertations about: "Fei"

Showing result 21 - 25 of 29 swedish dissertations containing the word Fei.

  2. 21. Cooperative Control of Leader-follower Multi-agent Systems under Transient Constraints

    Author : Fei Chen; Dimos V. Dimarogonas; Jana Tumova; Stephan Trenn; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical Engineering; Elektro- och systemteknik;

    Abstract : Significant research has been devoted to the problem of distributed consensus or formation control of multi-agent systems in the last decades. These distributed control strategies are designed for all agents and sometimes it may be redundant and costly since the desired tasks may be fulfilled by steering part of the agents through the appropriately designed local control strategy while the other agents can just follow some standard distributed control protocol. READ MORE

  4. 22. Chronic hepatitis B : immunological, virological and clinical aspects in the natural course and during the combined prednisolone and interferon-alpha-2b therapy

    Author : Guo-Zhong Fei; Karolinska Institutet; Karolinska Institutet; []
    Keywords : HBV; IgM and IgG anti-preS2; IgM anti-HBc; CD4 CD8 ratio; lymphocyte subpopulations; HBV DNA; ALT; chronic hepatitis; prednisolone; interferon-alpha;

    Abstract : The aims of this study were to characterize the IgM and IgG antibody responses to well-defined B-cell epitopes within the preS2 region of the HBV envelope proteins in sera from Chinese and Caucasian patients with chronic HBV infection in relation to viral load and liver disease activity. In addition, the effects of the combined prednisolone and interferon- alpha-2b therapy on these parameters, as well as on the peripheral lymphocyte subsets, were studied in Chinese patients with chronic hepatitis B. READ MORE

  5. 23. On Symbolic Analysis of Discrete Event Systems Modeled as Automata with Variables

    Author : Zhennan Fei; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Partitioning Techniques; Discrete Event Systems; Supervisory Control Theory; Extended Fi- nite Automata; Binary Decision Diagrams;

    Abstract : In benefit of the current revolution in computer technology, nowadays, society is dependent on dedicated computer-aided systems more than ever to assist us in every aspect of daily life. Thereby, designing reliable control logic of those systems to avoid malfunctioning behavior is of importance. READ MORE

  6. 24. 3D Time-lapse Analysis of Seismic Reflection Data to Characterize the Reservoir at the Ketzin CO2 Storage Pilot Site

    Author : Fei Huang; Christopher Juhlin; Alireza Malehmir; Ari Tryggvason; Andy Chadwick; Uppsala universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; CO2 storage; 3D Time-lapse 4D ; Reservoir characterization; Seismic simulation; Spectral decomposition; Wavelet phase; Tuning frequency; Thin-layer thickness; Seismic monitoring; Seismic processing; Quantitative interpretation; Geofysik med inriktning mot fasta jordens fysik; Geophysics with specialization in Solid Earth Physics;

    Abstract : 3D time-lapse seismics, also known as 4D seismics, have great potential for monitoring the migration of CO2 at underground storage sites. This thesis focuses on time-lapse analysis of 3D seismic reflection data acquired at the Ketzin CO2 geological storage site in order to improve understanding of the reservoir and how CO2 migrates within it. READ MORE

  7. 25. Electron and Spin Transport in Graphene-Based Nanodevices

    Author : Xiao-Fei LI; Yi Luo; Rajeev Ahuja; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; SRA - Transport; SRA - Transport;

    Abstract : This thesis is devoted to the multi-scale modeling of electron and spin transport in graphene-based nanodevices. Several devices with fascinating structures and attractive properties have been designed by means of state-of-the-art computational methods, which include ab-initio molecular dynamics (MD) simulations for the geometry, density functional theory (DFT) for the electronic structure, and non-equilibrium Green’s functions (NEGF) for carriers transport properties. READ MORE