نتایج جستجو برای: logan
تعداد نتایج: 1606 فیلتر نتایج به سال:
We obtain estimates for the Lp-norm of short-time Fourier transform (STFT) functions in modulation spaces, providing information about concentration on a given subset R2, leading to deterministic guarantees perfect reconstruction using convex optimization methods. More precisely, we large sieve inequalities Donoho-Logan type, but instead localizing signals regions T×W time-frequency plane inter...
.. Runway incursions are a persistent problem in airport ground-movement operations. Numerous critical conflicts and several fatal accidents have occurred as a result of unauthorized or otherwise inappropriate entry of aircra& or surface vehicles onto an active runway. Many of these conflicts developed quickly, leaving little time for effective intervention by either the controller or the pilot...
شته غلات Sitobion avenae (F.) (Hemiptera: Aphididae) یکی از آفات مهم گندم و زنبور Praon volucre (Hymenoptera: Braconidae) یکی از پارازیتوئیدهای اصلی این شته در ایران است. در این تحق‍یق، نیازهای گرمایی شته غلات و پارازیتوئید آن در 6 دمای ثابت (10، 15، 20، 25، 5/27 و 30 درجه سلسیوس)، رطوبت نسبی 5±60 درصد و دوره نوری 16 ساعت روشنایی و 8 ساعت تاریکی، روی گندم (رقم پ‍یشتاز) مورد ارزیابی قرار گرفت. ط...
This paper presents a novel approach to managing the aircraft taxi-out process at airports, by posing the problem in a network congestion control framework. A network model of the airport surface with stochastic link travel times is first developed. The model parameters for Boston Logan International Airport are estimated using empirical data from a surface surveillance system. Using the entry ...
Many researchers interpret switch costs in the explicit task-cuing procedure as reflecting endogenous task-set reconfiguration. G. D. Logan and C. Bundesen (2003) challenged this interpretation empirically and theoretically. They argued that many experiments confounded cue encoding benefits with switch costs and they showed that unconfounded switch costs could be vanishingly small. They propose...
Recently, several exact cone-beam reconstruction algorithms, such as the generalized filtered-backprojection (FBP) and backprojection-filtration (BPF) methods, have been developed to solve the long object problem. Although the well-known 3D Shepp-Logan phantom (SLP) is often used to validate these algorithms, it is deficient due to the discontinuity of the SLP. In this paper, we first construct...
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