Results 21 to 30 of about 3,429,219 (105)
Numerical simulations of negative-index refraction in wedge-shaped metamaterials [PDF]
, 2005 A wedge-shaped structure made of split-ring resonators (SRR) and wires is numerically simulated to evaluate its refraction behavior. Four frequency bands, namely, the stop band, left-handed band, ultralow-index band, and positive-index band, are ...
H. Liu +5 more
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Torsional suspension system for testing space structures [PDF]
, 1991 A low frequency torsional suspension system for testing a space structure uses a plurality of suspension stations attached to the space structure along the length thereof in order to suspend the space structure from an overhead support.
Gold, Ronald R., Reed, Wilmer H., III
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Maximum likelihood based estimation of frequency and phase offset in DCT OFDM systems under non-circular transmissions: algorithms, analysis and comparisons [PDF]
, 2008 Recently, the advantages of the discrete cosine transform (DCT) based orthogonal frequency-division multiplexing (OFDM) have come to the light. We thus consider DCT- OFDM with non-circular transmission (our results cover circular transmission as well ...
Cui, Tao +3 more
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Intern Self-Care: An Exploratory Study Into Strategy Use and Effectiveness [PDF]
, 2005 In this exploratory study, 363 interns were surveyed to assess the frequency of use and effectiveness of self-care strategies used during the internship year. Among the most frequently used strategies were family and friend social support, active problem
Castro, Jennifer R +6 more
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Synchronous frequency support of photovoltaic power plants with inertia emulation [PDF]
, 2019 ©2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new ...
Candela García, José Ignacio +4 more
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, 2008 Diffraction microtomography in coherent light is foreseen as a promising technique to image transparent living samples in three dimensions without staining.
A. C. Kak +14 more
core +3 more sources
Frequency dependence of pulsar radiation patterns [PDF]
, 2001 We report on new results from simultaneous, dual frequency, single pulse observation of PSR B0329+54 using the Giant Metrewave Radio Telescope. We find that the longitude separation of subpulses at two different frequencies (238 and 612 MHz) is less than
Gil J. +12 more
core +4 more sources
Natural frequencies of elastically supported orthotropic reactangular plates [PDF]
The Journal of the Acoustical Society of America, 1975 An expression is derived from which the natural frequencies of a rectangular orthotropic plate, under any combination of simply supported, elastically supported, or clamped boundary conditions, can be obtained. The Mindlin–Timoshenko theory, which includes the effects of transverse shear and rotary inertia, is used to describe the plate motion.
openaire +1 more source
VSC-HVDC for Frequency Support (a review) [PDF]
13th IET International Conference on AC and DC Power Transmission (ACDC 2017), 2017 To reduce CO2 emissions produced by electricity generation, conventional fossil fuel power plants are being decommissioned. Renewable energy sources (RES) and interconnectors are replacing these old power plants but have different operating characteristics.
Fradley, John +2 more
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Real-time frequency parameter extraction for electronic support systems
2016 24th Signal Processing and Communication Application Conference (SIU), 2016 In this research, real time automatic frequency parameter extraction methods for electronic support systems are implemented on FPGA. The frequency parameter is extracted by using digital instantaneous frequency measurement (DIFM) and fast fourier transform (FFT) methods.
Ortatatli, Ismail Emre +5 more
openaire +3 more sources