Results 241 to 250 of about 3,680 (277)

Some approximations of trapezoidal fuzzy sets

Proceedings Joint 9th IFSA World Congress and 20th NAFIPS International Conference (Cat. No. 01TH8569), 2002
We study different approximations of fuzzy sets. In the multidimensional case we obtain the crisp approximation of a fuzzy set. In the one-dimensional case we define tame fuzzy sets and approximate them with combinations of trapezoidal ones.
E. Roventa, T. Spircu
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Exact and approximate spectra for trapezoidal FM

Proceedings of the IEEE, 1976
The intensity spectrum for an FM signal modulated by a trapezoidal waveform is given in terms of Fresnel integrals. The numerical results, as observed with a finite resolution filter, are compared with the quasi-stationary model, which is asymptotically valid for large values of the FM index. The size of the discrepancy relative to the asymptotic model
L.H. Holway, J.A. Mullen
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Trapezoidal approximations of fuzzy numbers using quadratic programs

Fuzzy Sets and Systems, 2021
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Bi-symmetrically Weighted Trapezoidal Approximations of Fuzzy Numbers

2009 Ninth International Conference on Intelligent Systems Design and Applications, 2009
Trapezoidal approximation of fuzzy numbers preserving the expected interval is considered. A general problem of the trapezoidal approximation of fuzzy numbers with respect to the distance based on bi-symmetrical weighted functions is solved. A practical algorithm for constructing approximation operator is given.
Przemyslaw Grzegorzewski, Karolina Pasternak-Winiarska   +1 more
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The trapezoidal approximation of digitized images

Computer Vision, Graphics, and Image Processing, 1984
Abstract A highly efficient process for representing and compressing scanned data is described which vectorizes black-white document symbology by approximating it by means of trapezoidal shapes. Also discussed are methods for encoding the resultant descriptions for transmission or archival storage. Test results indicate the system can be used for the
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Trapezoidal approximation-preserving the fuzziness of a fuzzy number

2012 9th International Conference on Fuzzy Systems and Knowledge Discovery, 2012
Fuzziness is an important index to capture the relevant information about the fuzzy number's ill-defined magnitude. In this paper, we propose a new trapezoidal approximation of an arbitrary fuzzy number, which preserves its fuzziness. Some properties of translation invariance, scale invariance, preservation of expected value, width and fuzziness of ...
Zhongxing Wang, Haibin Xie, Lili Niu
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Weighted semi-trapezoidal approximations of fuzzy numbers

Fuzzy Sets and Systems, 2011
The author embeds fuzzy numbers into a Hilbert space \(H\) for computing their weighted semi-trapezoidal approximations via best approximations in a closed convex subset of \(H\). Formulas of matricial type are given, thus improving results of \textit{A. I. Ban} [Fuzzy Sets Syst. 160, No.~21, 3027--3047 (2009; Zbl 1183.03047); ibid.
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Trapezoidal and triangular approximations preserving the expected interval

Fuzzy Sets and Systems, 2008
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Weighted trapezoidal and triangular approximations of fuzzy numbers

Fuzzy Sets and Systems, 2009
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A note on trapezoidal approximations of fuzzy numbers

Fuzzy Sets and Systems, 2007
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