Results 21 to 30 of about 2,516,410 (332)
The role of hillshade regime on canopy density and evaluation of ecological capability in the Zagros forests (Case study: Kabirkooh forest of Badreh city, Ilam province) [PDF]
تحقیقات جنگل و صنوبر ایران, 2017 The purpose of this research was to investigate the role of hillshade values, in comparison with terrain aspect, in the canopy changes and evaluation of ecological capability in vegetation domain of Zagros forests.
Ali Najafifar +3 more
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Vector Map Encryption Algorithm Based on Double Random Position Permutation Strategy
ISPRS International Journal of Geo-Information, 2021 Encryption of vector maps, used for copyright protection, is of importance in the community of geographic information sciences. However, some studies adopt one-to-one mapping to scramble vertices and permutate the coordinates one by one according to the ...
Xiaolong Wang, Haowen Yan, Liming Zhang
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THE WAY TO CREATE A PLANE CREMONA MAP FROM ITS CHARACTERISTIC
Tạp chí Khoa học Đại học Đà Lạt, 2022 We describe how to construct a plane Cremona map from its characteristic, which refers to the degree and the list of base-points with their respective multiplicities, and provide some examples of maps of degrees 2 and 3.
Thi Ngoc Giao Nguyen
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Quadratic transformation of multivariate aggregation functions
Dependence Modeling, 2020 In this work, we prove that quadratic transformations of aggregation functions must come from quadratic aggregation functions. We also show that this is different from quadratic transformations of (multivariate) semi-copulas and quasi-copulas.
Boonmee Prakassawat, Tasena Santi
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Basins of attraction for a quadratic coquaternionic map
, 2017 In this paper we consider the extension, to the algebra of coquaternions, of a complex quadratic map with a real super-attractive 8-cycle. We establish that, in addition to the real cycle, this new map has sets of non-isolated periodic points of period 8,
M. I. Falcão +3 more
semanticscholar +2 more sources
Speech encryption using chaotic shift keying for secured speech communication
EURASIP Journal on Audio, Speech, and Music Processing, 2017 This paper throws light on chaotic shift keying-based speech encryption and decryption method. In this method, the input speech signals are sampled and its values are segmented into four levels, namely L 0, L 1, L 2, and L 3. Each level of sampled values
P. Sathiyamurthi, S. Ramakrishnan
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Publications of the Research Institute for Mathematical Sciences, 1988 The set of observables of a Quantum Mechanical System need only be closed under a "quadratic" product. It is shown that an additive structure of this set (whose existence is less natural) is uniquely determined by this multiplicative structure.
Friedman, Yaakov, Hakeda, Josuke
openaire +3 more sources
Convexity of a Small Ball Under Quadratic Map [PDF]
, 2014 We derive an upper bound on the size of a ball such that the image of the ball under quadratic map is strongly convex and smooth. Our result is the best possible improvement of the analogous result by Polyak [1] in the case of a quadratic map.
A. Dymarsky
semanticscholar +1 more source
ITERATION OF QUADRATIC MAPS ON MATRIX ALGEBRAS [PDF]
International Journal of Bifurcation and Chaos, 2012 We study the iteration of a quadratic family in the algebra of 2 × 2 real matrices, parameterized by a matrix C. We analyze and classify the existing cycles (periodic orbits) and their dependence on the parameter matrix. We discuss how new dynamical phenomena occur as a consequence of the noncommutativity of the matrix product.
Alexandra Nascimento Baptista +2 more
openaire +3 more sources
ESAIM: Proceedings and Surveys, 2014 The rigorous proofs are given: (1) for the existence of the unbounded invariant curves, containing the fixed point – source (μ + 1; 1), of the maps from the one-parameter family Fμ(x,y) = (xy, (x − μ)2), μ ∈ [
Belmesova S.S. +2 more
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