Results 211 to 220 of about 34,480 (263)
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ACM Transactions on Database Systems, 1986
In a large integrated database, there often exists an “information hierarchy,” where both raw data and derived data are stored and used together. Therefore, among update transactions, there will often be some that perform only read accesses from a certain (i.e., the “raw” data) portion of the database and write into another (i.e., the “derived” data ...
Meichun Hsu, Arvola Chan
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In a large integrated database, there often exists an “information hierarchy,” where both raw data and derived data are stored and used together. Therefore, among update transactions, there will often be some that perform only read accesses from a certain (i.e., the “raw” data) portion of the database and write into another (i.e., the “derived” data ...
Meichun Hsu, Arvola Chan
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Phase locking of biological clocks
Journal of Mathematical Biology, 1982Radial isochron clocks (RICs) and their response to external signals and coupling with other RICs are studied. RICs are derived as phase approximations to self-sustained oscillators. Their response to single impulses (phase resetting) and to repetitive impulses is determined. This response may be harmonic or chaotic.
Hoppensteadt, F. C., Keener, J. P.
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On phase locking of pulse encoders
Bulletin of Mathematical Biology, 1978Several models have been proposed to underststand the patterns of nerve impulses produced by periodic stimuli. This paper shows that for a very large class of such models there exists a pattern of phases that repeats periodically after a finite number of pulses; the actual pulses produced by the model depend on its initial condition, but in all cases ...
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Lunar and menstrual phase locking
American Journal of Obstetrics and Gynecology, 1980In a selected population of 312 women, prospective menses records were maintained during the autumn of 1977. Women whose menstrual cycle duration approaches the cycle duration of the earth's moon (29.5 days) tend to ovulate in the dark phase of the lunar period. The dark phase encompasses the half-cycle of the month from last quarter, through new moon,
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Phase locking an atom interferometer
2016 European Frequency and Time Forum (EFTF), 2016In atom interferometry the phase evolution of a quantum superposition state is measured with respect to a reference signal. The measurement has a limited unambiguous interval, since not the phase but its projection is measured as a population unbalance on two energetic levels. Resolving phase wrapping brings to a longer interrogation interval and hence
Bartoldi, Andrea +5 more
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IEEE Transactions on Communications, 1977
A phase-lock loop occasionally will take a long time to settle to equilibrium. Phase dwells at a large error for a prolonged interval. This phenomenon has been dubbed "hangup." The periodic nature of phase detectors is responsible for hangup, which occurs near the reverse-slope, unstable null.
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A phase-lock loop occasionally will take a long time to settle to equilibrium. Phase dwells at a large error for a prolonged interval. This phenomenon has been dubbed "hangup." The periodic nature of phase detectors is responsible for hangup, which occurs near the reverse-slope, unstable null.
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Compact internal sensing phase locking system for coherent combining of fiber laser array
Optics and Laser Technology, 2022Yuqiu Zhang, Tianyue Hou, Pengfei Ma
exaly