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  • 1
    Electronic Resource
    Electronic Resource
    Intense spontaneous amplified emission of Li2 diffuse violet bands in the 4400 Å region (1987)
    Springer
    Applied physics 43 (1987), S. 225-230 
    Details
    ISSN: 1432-0649
    Keywords: 42.60 ; 42.65 ; 33.80K
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We report observation of intense spontaneous amplified radiation of Li2 diffuse violet band in the 4100–4900 Å region. The radiation is strongly enhanced when the lithium vapor in a heat pipe is optically pumped with a pulsed dye laser with the output wavelength tuned to near the Li 2s–4s two-photon resonance transition. The diffuse violet band can probably be assigned to a recently reported triplet bound-free (23 Π g →a 3 Σ u + ) transition. It is found that the productions of the molecular diffuse band are contributed from Li atoms as well as Li2 molecules. The excitation functions and their dependence on laser power density are presented and the mechanisms for producing the diffuse bands are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00692492
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Observation of 280 nm and 298 nm ultraviolet emissions in sodium vapor (1989)
    Springer
    Applied physics 48 (1989), S. 421-426 
    Details
    ISSN: 1432-0649
    Keywords: 42.60 ; 42.65
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Dye laser output around 578 nm is utilized to pump sodium vapor confined in a heatpipe. Fixed wavelength ultraviolet emissions at 280 nm and 298 nm are observed for the first time and can be explained by anti-Stokes Raman scattering and two photon emission respectively. In addition, there are tunable emission lines around 280 nm and 298 nm, the frequencies of which vary with pump laser wavelength. These tunable lines can be explained by four-wave mixing schemes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694543
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Robust stabilization of uncertain linear dynamical systems with time-varying delay (1994)
    Springer
    Journal of optimization theory and applications 82 (1994), S. 593-606 
    Details
    ISSN: 1573-2878
    Keywords: Robust stabilization ; linear dynamical systems ; time-varying delays ; sufficient conditions ; unstructured and structured uncertainties ; algebraic Riccati equation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract In this paper, the problem of the robust stabilization for a class of uncertain linear dynamical systems with time-varying delay is considered. By making use of an algebraic Riccati equation, we derive some sufficient conditions for robust stability of time-varying delay dynamical systems with unstructured or structured uncertainties. In our approach, the only restriction on the delay functionh(t) is the knowledge of its upper boundh −. Some analytical methods are employed to investigate these stability conditions. Since these conditions are independent of the delay, our results are also applicable to systems with perturbed time delay. Finally, a numerical example is given to illustrate the use of the sufficient conditions developed in this paper.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02192220
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Sufficient conditions for robust stability of large-scale dynamical systems including delayed states and parameter perturbations in interconnections (1995)
    Springer
    Journal of optimization theory and applications 85 (1995), S. 727-739 
    Details
    ISSN: 1573-2878
    Keywords: Large-scale dynamical systems ; time-varying delays ; decentralized state feedback controllers ; uncertain parameters ; robustness ; sufficient conditions ; algebraic Riccati equation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract The problem of the robust stability of large-scale dynamical systems including delayed states and parameter perturbations in interconnections is considered. By using algebraic Riccati equations and some analytical methods, some sufficient conditions on linear decentralized state feedback controllers are derived so that the systems remain stable in the presence of delayed states and parameter perturbations. Such conditions give some bounds on the perturbations of interconnections with delayed states and uncertain parameters, and result in a quantitative measures of robustness for large-scale dynamical systems including delayed states and uncertain parameters in interconnections. The results obtained in this paper are applicable not only to large-scale systems with multiple time-varying delays, but also to large-scale systems without exact knowledge of the delays, i.e., large-scale systems with uncertain delays.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02193064
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    Paper (German National Licenses)
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