Results 41 to 50 of about 5,706,267 (307)
2D Extreme–Point Symmetric Mode Decomposition Method
IOP Conference Series: Materials Science and Engineering, 2020 Abstract This paper proposes a kind of 2D extension of Extreme–Point Symmetric Mode Decomposition Method. The 2D-sifting process is performed by 4 steps: 1 Extrema points detection (by neighboring window). 2 Delaunay triangulation is done over the grid of all extrema points. 3 Mid points of the triangulation are obtained.
Feng Gao, Chunmei Chi
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Low dispersion spectroscopy of point-symmetric planetary nebulae [PDF]
Proceedings of the International Astronomical Union, 2011 AbstractWe present an observational study of three oint-ymmetric lanetary ebulae (PS-PNe): PC 19, He 2-429, and He 1-1, whose kinematics has been previously reported in the literature. The study includes an analysis of physical conditions and chemical abundances.
Lorenzo Olguín +4 more
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Sustainability, 2019 The randomness and volatility of wind power poses a serious threat to the stability, continuity, and adjustability of the power system when it is connected to the grid.
Jianguo Zhou +3 more
semanticscholar +1 more source
International Journal of Disaster Risk Science, 2019 Assessment of spatiotemporal characteristics of drought under climate change is significant for drought mitigation. In this study, the standardized precipitation evapotranspiration index (SPEI) calculated at different timescales was adopted to describe ...
Kai Feng, Xiaoling Su
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3D AMR Simulations of Point-Symmetric Nebulae [PDF]
, 2006 At the end of their lives low mass stars such as our Sun lose most of their mass. The resulting planetary nebulae show a wide variety of shapes, from spherical to highly bipolar. According to the generalized interacting stellar winds model, these shapes are due to an interaction between a very fast tenuous outflow, and a denser environment left over ...
Rijkhorst, Erik-Jan +2 more
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Sets Characterized by Missing Sums and Differences in Dilating Polytopes [PDF]
, 2014 A sum-dominant set is a finite set $A$ of integers such that $|A+A| > |A-A|$. As a typical pair of elements contributes one sum and two differences, we expect sum-dominant sets to be rare in some sense.
Do, Thao +5 more
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On Coincidence and Fixed-Point Theorems in Symmetric Spaces
Fixed Point Theory and Applications, 2008 We give an axiom (C.C) in symmetric spaces and investigate the relationships between (C.C) and axioms (W3), (W4), and (H.E). We give some results on coinsidence and fixed-point theorems in symmetric spaces, and also, we give some examples for the ...
Jong-Sook Bae +2 more
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OSA Continuum, 2019 We propose a high fabrication tolerance and broadband silicon polarization beam splitter (PBS) by cascading point-symmetric 3-dB couplers designed using fast quasiadiabatic dynamics (FAQUAD).
H. Chung, S. Tseng
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Knots in the outer shells of the planetary nebulae IC 2553 and NGC 5882 [PDF]
, 2000 We present images and high-resolution spectra of the planetary nebulae IC 2553 and NGC 5882. Spatio-kinematic modeling of the nebulae shows that they are composed of a markedly elongated inner shell, and of a less aspherical outer shell expanding at a ...
Acker A. +25 more
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Sustainability, 2018 The nonlinear and non-stationary nature of wind power creates a difficult challenge for the stable operation of the power system when it accesses the grid.
Jianguo Zhou, Xuechao Yu, Baoling Jin
semanticscholar +1 more source