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261
Time-evolution of a caustic
Published 1988-01-01“…The Lagrange manifold formalism is adapted to study the time-evolution of caustics associated with high frequency wave propagation in media with both spatial and temporal inhomogenities.…”
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Time to Consensus in International Negotiations
Published 2024-09-01Subjects: Get full text
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Topolectrical space-time circuits
Published 2025-01-01“…Through the implementation of topolectrical space-time circuits, three distinct types of topological space-time crystals are experimentally demonstrated, including the (1 + 1)-dimensional topological space-time crystal with midgap edge modes, (2 + 1)-dimensional topological space-time crystal with chiral edge states, and (3 + 1)-dimensional Weyl space-time semimetals. …”
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Psychological impacts of "screen time" and "green time" for children and adolescents: A systematic scoping review.
Published 2020-01-01“…This combination of high screen time and low green time may affect mental health and well-being. …”
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270
Determining Time Variation of Cable Tension Forces in Suspended Bridges Using Time-Frequency Analysis
Published 2018-01-01“…An analytical model of the suspender cables was developed to evaluate the power spectral density (PSD) function of a cable with consideration of cable flexural stiffness. Discrete-time, short-time Fourier transform (STFT) was utilized to analyze the recorded acceleration histories in both time and frequency domains. …”
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271
Distributed Consensus for Discrete-Time Directed Networks of Multiagents with Time-Delays and Random Communication Links
Published 2013-01-01“…This paper is concerned with the leader-following consensus problem in mean-square for a class of discrete-time multiagent systems. The multiagent systems under consideration are the directed and contain arbitrary discrete time-delays. …”
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272
Investigating time-independent and time-dependent diffusion phenomena using steady-state diffusion MRI
Published 2025-01-01“…Building on Extended Phase Graphs (EPG), I establish two alternative representations of the DW-SSFP signal in terms of (1) conventional b-values (time-independent diffusion) and (2) encoding power-spectra (time-dependent diffusion). …”
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273
Joint resampling algorithm for parallel dual feedback time-frequency domain symbol timing recovery
Published 2023-04-01“…Aiming at the problem that it is difficult for existing implementation algorithms of symbol timing recovery to give full consideration to high convergence accuracy and the robustness to resist timing deviation, a high-speed parallel symbol timing recovery algorithm with resampling was proposed.The timing frequency offset and timing phase offset were corrected by using double feedback loops.In the design of parallel resampling, the implementation of parallel numerically controlled oscillators and the use of enable signals sorting and shift registers to implement data reordering were proposed.When designing the timing recovery loop, the parallel implementation structure of the O&M timing error estimation algorithm was analyzed and deduced, and the design method and implementation structure of the loop correction were proposed based on the analysis of the timing phase/frequency offset correction principle.The FPGA test results show that the proposed algorithm can realize the symbol timing recovery of 64APSK modulated signals with arbitrary multiple symbol rate between 4 and 16 times, and the error vector magnitude (EVM) with the ideal signal is within 4%, which meets the requirements of broadband satellite communication.…”
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274
Real-time prediction and updating method for LEO satellite handover based on time evolving graph
Published 2018-10-01Subjects: Get full text
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275
The Category of Time in Fairy Tales: Searching for Folk Calendar Time in the Estonian Fairy Tale Corpus
Published 2011-03-01Subjects: Get full text
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276
Are Suggested Hiking Times Accurate? A Validation of Hiking Time Estimations for Preventive Measures in Mountains
Published 2025-01-01“…<i>Background and Objectives</i>: Accurate hiking time estimate is crucial for outdoor activity planning, especially in mountainous terrains. …”
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Nonfragile H∞ Filter Design for Nonlinear Continuous-Time System with Interval Time-Varying Delay
Published 2018-01-01“…This paper investigates nonfragile H∞ filter design for a class of continuous-time delayed Takagi-Sugeno (T-S) fuzzy systems with interval time-varying delays. …”
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278
A Time-Space Collocation Spectral Approximation for a Class of Time Fractional Differential Equations
Published 2012-01-01“…A numerical scheme is presented for a class of time fractional differential equations with Dirichlet's and Neumann's boundary conditions. …”
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279
Vestibular stimulation and space-time interaction affect the perception of time during whole-body rotations.
Published 2025-01-01“…Among the factors, such as emotions, that distort time perception, vestibular stimulation causes a contraction in subjective time. …”
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Relationship of Morning Cortisol to Circadian Phase and Rising Time in Young Adults with Delayed Sleep Times
Published 2012-01-01“…The present study was aimed at further elucidating the relationship between circadian phase, rising time, and the morning cortisol awakening response (CAR). …”
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