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Spectrum and Pseudo-Spectrum [PDF]
, 2019 In this book all Hilbert spaces will be assumed to separable for simplicity. In this section we review some basic definitions and properties; we refer to Kato (Perturbation theory for linear operators, Die Grundlehren der mathematischen Wissenschaften, Band 132. Springer, New York, 1966), Reed and Simon (Methods of modern mathematical physics.
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, 1965 Let T be a linear operator whose domain D(T) and range R(T) both lie in the same complex linear topological space X. We consider the linear operator $${T_\lambda } = \lambda I - T,$$ , where λ is a complex number and I the identity operator. The distribution of the values of λ for which T λ has an inverse and the properties of the inverse when ...
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Voice Spectrum and Sidetone Spectrum
1974When a speaker hears his own voice fed back to him with altered intensity or timing, he adjusts the properties of his speech to compensate for the apparent distortion of his message. These adjustments appear to be designed to provide the listener with intelligible messages rather than to provide the speaker with some acoustic feedback required for ...
A. P. Van Teslaar, Harlan Lane
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How to cope with the Spectrum of Spectrum
1995The specification language Spectrum [BFG+93] melts a wide range of concepts into a single language frame: three-valued first-order logic, polymorphism, type classes, higher-order functions, infinite objects. The desire of identifying and relating sub-languages satisfying certain constraints given by syntactical and pragmatic considerations appears.
U. Wolter +5 more
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Spectrum Sharing and Spectrum Efficiency
SSRN Electronic Journal, 2007This policy paper for an Aspen Institute Roundtable on Spectrum Policy identifies obstacles to spectrum efficiency and policy changes that would increase efficiency and sharing of wireless resources.
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Spectrum usage model for smart spectrum
2019 IEEE/CIC International Conference on Communications Workshops in China (ICCC Workshops), 2019This paper focuses on a spectrum usage model in the time domain in the context of dynamic spectrum access (DSA). To achieve a sophisticated dynamic spectrum access, understanding the spectrum usage is an important task. We focus on duty cycle (DC) as a feature quantity of spectrum usage in the time domain and observed DC (O-DC) obtained from long-term ...
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Oncologic emergencies and urgencies: A comprehensive review
Ca-A Cancer Journal for Clinicians, 2022Bonnie Gould Rothberg +2 more
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