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spectrum limit

См. также в других словарях:

  • Spectrum analyzer — A spectrum analyzer Spectrum analyzer display A spectrum analyzer measures the magnitude of an input signal versus frequency with …   Wikipedia

  • Spectrum of a C*-algebra — The spectrum of a C* algebra or dual of a C* algebra A, denoted Â, is the set of unitary equivalence classes of irreducible * representations of A. A * representation π of A on a Hilbert space H is irreducible if, and only if, there is no closed… …   Wikipedia

  • Limit cardinal — In mathematics, limit cardinals are a type of cardinal number.With the cardinal successor operation defined, we can define a limit cardinal in analogy to that for limit ordinals: λ is a (weak) limit cardinal if and only if λ is neither a… …   Wikipedia

  • limit — I (New American Roget s College Thesaurus) Boundary Nouns limit, boundary, bounds, confines; curbstone, term, edge; compass; bourne, verge, pale; termination, terminus, end, terminal, extremity; stint; frontier, precinct, border, marches,… …   English dictionary for students

  • limit — A boundary or end. [L. limes, boundary] critical l. the upper or lower boundary of a laboratory test result that indicates a life threatening value. elastic l. the greatest stress to which a material may be subjected and still be capable of… …   Medical dictionary

  • Greisen–Zatsepin–Kuzmin limit — The Greisen–Zatsepin–Kuzmin limit (GZK limit) is a theoretical upper limit on the energy of cosmic rays (high energy charged particles from space) coming from distant sources. The limit is 5×1019 eV, or about 8 joules. The limit is set by slowing …   Wikipedia

  • Greisen-Zatsepin-Kuzmin limit — The Greisen Zatsepin Kuzmin limit (GZK limit) is a theoretical upper limit on the energy of cosmic rays from distant sources. Computation of the GZK limit This limit was computed in 1966 by Kenneth Greisencite journal |last=Greisen |first=Kenneth …   Wikipedia

  • Electromagnetic spectrum — The electromagnetic (EM) spectrum is the range of all possible electromagnetic radiation frequencies. [cite web|url=http://imagine.gsfc.nasa.gov/docs/dict ei.html#em spectrum|title=Imagine the Universe! Dictionary] The electromagnetic spectrum… …   Wikipedia

  • Frequency-hopping spread spectrum — (FHSS) is a method of transmitting radio signals by rapidly switching a carrier among many frequency channels, using a pseudorandom sequence known to both transmitter and receiver. A spread spectrum transmission offers three main advantages over… …   Wikipedia

  • Spread spectrum — Passband modulation v · d · e Analog modulation AM · …   Wikipedia

  • Military spectrum management — Every military force has a goal to ensure and have permanent access to radio frequencies to meet its vital military tasks. This is based on strategies, doctrines and different policies that military forces adhere to. The nature of high mobility… …   Wikipedia

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