Results 51 to 60 of about 61,880 (163)
Non-stationarity of Open Star Clusters [PDF]
, 2021 The monograph poses issues related to the study of the non-stationarity of open star clusters (OSCs), starting with an analysis of the properties of the trajectories of individual stars to the study of collective motion of stars. A discussion of the dynamics of correlations and wave processes in such clusters is presented. The mechanisms of the dynamic
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Design impact and significance of non-stationarity of variance in extreme rainfall [PDF]
Proceedings of the International Association of Hydrological Sciences, 2015 Stationarity in hydro-meteorological records is often investigated through an assessment of the mean value of the tested parameter. This is arguably insufficient for capturing fully the non-stationarity signal, and parameter variance is an equally ...
M. Al Saji +2 more
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Analysis of the Local Quasi-Stationarity of Measured Dual-Polarized MIMO Channels
, 2014 It is common practice in wireless communications to assume strict or wide-sense stationarity of the wireless channel in time and frequency. While this approximation has some physical justification, it is only valid inside certain time-frequency regions ...
Ascheid, Gerd +3 more
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HydroResearchResearch on hydrological extremes has increased due to their increasing frequency and destructive power, with their non-stationarity attributed to human activities and climate change.
Maximo Basheija Twinomuhangi +6 more
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MIRA: Model-Based Imagined Rollouts Augmentation for Non-Stationarity in Multi-Agent Systems
Mathematics, 2022 One of the challenges in multi-agent systems comes from the environmental non-stationarity that policies of all agents are evolving individually over time. Many existing multi-agent reinforcement learning (MARL) methods have been proposed to address this
Haotian Xu +4 more
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, 2005 We present a perturbative reconstruction method to make a skymap of gravitational-wave backgrounds (GWBs) observed via space-based interferometer. In the presence of anisotropies in GWBs, the cross-correlated signals of observed GWBs are inherently time ...
A. R. Edmonds +5 more
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Testing diffusion processes for non-stationarity
Mathematical Methods of Operations Research, 2008 Financial data are often assumed to be generated by diffusions. Using recent results of \textit{J. Fan} et al. [J. Am. Stat. Assoc. 102, No. 478, 618--631 (2007; Zbl 1172.62329), J. Financ Econometer, 5, 321--357 (2007)] and a multiple comparisons procedure created by \textit{Y. Benjamini} and \textit{Y. Hochberg} [J. R. Stat. Soc., Ser.
Hamrick, Jeff, Taqqu, Murad S
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Spatial non-stationarity analysis to estimate dwelling units in Riyadh, Saudi Arabia
European Journal of Remote Sensing, 2018 Dwelling unit (population) data at finer zones are important for different applications. The census data are not available every year and published at coarse zones.
Mohammed Alahmadi
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Image Analysis and Stereology, 2014 This paper represents a survey of recent advances in modeling of space or space-time Gaussian Random Fields (GRF), tools of Geostatistics at hand for the understanding of special cases of noise in image analysis.
Pablo Gregori, Emilio Porcu, Jorge Mateu
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Beyond Cumulative Sum Charting in Non-Stationarity Detection and Estimation
IEEE Access, 2019 In computer science, stochastic processes, and industrial engineering, stationarity is often taken to imply a stable, predictable flow of events and non-stationarity, consequently, a departure from such a flow. Efficient detection and accurate estimation
Felix Zhan +8 more
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