نتایج جستجو برای: duty cycle scheduling
تعداد نتایج: 354875 فیلتر نتایج به سال:
In wideband systems that decorrelate in time and frequency, capacity can be reached in the limit of infinite bandwidth by using impulsive frequency-shift keying with vanishingly small duty cycle. The richness of the codewords is then created through the large bandwidth. We show that frequencyshift keying with small duty cycle, using traditional random coding arguments, can achieve rates close t...
We fabricated coplanar homojunction a-IGZO TFTs that are highly stable under AC and DC bias-temperature-stress. For TFTs of the size W/L = 60μm/10μm, the stress-induced threshold voltage shifts are all within -0.35 V. A comprehensive investigation of AC BTS stress polarity, pulse width, and duty cycle dependence is presented. We find that higher frequency of bipolar AC pulses increases the devi...
At first sight, recent studies investigating the temporal limits of attentive tracking show contradictory outcomes. Attentively tracking an object in an ambiguous apparent motion display can have an upper limit of around 0.4 revolutions per second (rps) [Horowitz, T. S., Holcombe, A. O., Wolfe, J. M., Arsenio, H. C., & DiMase, J. S. (2004). Attentional pursuit is faster than attentional saccade...
The Neighbor Discovery is a process by which a node identifies its neighbor nodes in its vicinity. We are particular interested in Neighbor Discovery problem in duty-cycle mobile sensor networks in this paper, where a mobile sensor needs to detect its neighbor nodes during its wake-up states. We proposed an algorithm which utilizes the boundary nodes in the communication range of the node to pr...
In this paper we adopt the common cycle approach to economic lot scheduling problem and minimize the maximum aggregate inventory. We allow the occurrence of the idle times between any two consecutive products and consider limited capital for investment in inventory. We assume the setup times are negligible. To achieve the optimal investment in inventory we first find the idle times which minimi...
We report the theory and experiment for an amplitude modulator and wavelength converter based on an electrodecoated asymmetric-duty-cycle periodically poled lithium niobate (PPLN). In a 56%/44% domain-duty-cycle PPLN crystal, we modulated the amplitude of the 532-nm second-harmonic output and measured a normalized half-wave voltage of 1:1 V d ðlmÞ=leff (cm), where d is the separation of the ele...
Energy conversation is one of the primary objectives of duty cycle MAC protocols. Different synchronous and asynchronous duty cycle MAC protocols have been proposed in recent years. These protocols perform well under low traffic loads, but efficiency of these protocols degrade under high traffic loads. We present an asynchronous hybrid duty cycle MAC protocol called Hybrid MAC (H-MAC), which us...
Intelligibility of sentences gated with a single primary rate (0.5-8 Hz, 25-75% duty cycle) or gated with an additional concurrent rate of 24 Hz and a 50% duty cycle was examined in older normal-hearing and hearing-impaired listeners. With a stronger effect of age than hearing loss, intelligibility tended to increase with primary rate and duty cycle, but varied for dual-rate gating. Reduction i...
The integration of ion mobility spectrometry (IMS) with a trap-based mass spectrometer (MS) such as Orbitrap using the dual gate approach suffers from low duty cycle. Efforts to improve the duty cycle involve the utilization of Hadamard transform-based double multiplexing which significantly improves the signal-to-noise ratio and duty cycle of the ion mobility-Orbitrap mass spectrometry (IM-Orb...
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