جستجو در تالارهای گفتگو
در حال نمایش نتایج برای برچسب های 'Correlation Dimension'.
2 نتیجه پیدا شد
-
Estimation of Daily Discharge of Baranduz River via Chaos Theory
admin پاسخی ارسال کرد برای یک موضوع در مقالات تخصصی گرایش مهندسی آب
Estimation of Daily Discharge of Baranduz River via Chaos Theory Original Article, D45 Pour Mohammad Aghdam A, Asheghi R, Merufinia E. J. Civil Eng. Urban. 4(3): 293-297. 2014 ABSTRACT: The chaotic behavior of monthly precipitation time series is investigated using the phase-space reconstruction technique and the principal component analysis method. To reconstruct phase space, the time delay and embedding dimension are needed and for this purpose, average mutual information and algorithm of false nearest neighbors are used. The delay time for Baranduz River is calculated via the average mutual information method which is equal to 66. The most suitable inscribed dimension, by use of false nearest neighbors approach, is about 28. The correlation in time series of water flow is equal to 3.1 which require at least 3 variables to describe the system. The low value of correlation in daily scale is an indication of the existence of chaos in the water flow of Baranduz Chay River. Keywords: Baranduz Chay River, Chaos Theory, Correlation Dimension, Delay Time منبع: [Hidden Content] دانلود: [Hidden Content].,%204%20(3)%20293-297,%202014.pdf J. Civil Eng. Urban., 4 (3) 293-297, 2014.pdf-
- Baranduz Chay River
- Chaos Theory
-
(و 2 مورد دیگر)
برچسب زده شده با :
-
Evidence of Low-Dimensional Determinism in Monthly Water Level Time Series in Lake Van, Turkey
admin پاسخی ارسال کرد برای یک موضوع در مقالات تخصصی گرایش مهندسی آب
Evidence of Low-Dimensional Determinism in Monthly Water Level Time Series in Lake Van, Turkey Original Article, B39 Daneshfaraz R, Asadi H, Saghebian SM. Journal. Civil Eng. Urban. 2(6): 220-225. 2012. ABSTRACT:Adequate knowledge of lake water level variations is important for proper planning and management of water resources and design of environment. In this study chaotic behavior of monthly water level variations in the lake Van during January 1944 - April 2002 is investigated. The lake Van is the largest lake in Turkey. The methods and indicators of chaos theory (power spectrum, average mutual information, false nearest neighbours, correlation dimension and largest Lyapunov exponents) were applied. The value of power spectrum (4.1) indicate that chaotic (fractal) behavior to the lake water level time series. The optimal delay time (5 month) and embedding dimension (5) are obtained from average mutual information and false nearest neighbours techniques, respectively. Optimal values are then used for the estimation of the correlation dimension and the largest Lyapunov exponent for inspecting possible signatures of chaotic dynamics. The low correlation dimension (3.2) suggest the presence of low-dimensional chaos; also imply that the water level dynamics are dominantly governed by four variables. The positive largest Lyapunov exponent value (0.0085) indicated a signature of chaos. These results give a positive indication towards considering lake water level as a chaotic system. Keywords:Chaos theory, Correlation dimension, Lyapunov exponent, Power spectrum, Time series, Van Lake. منبع: [Hidden Content] دانلود: [Hidden Content],%20B%2039%20220-225.pdf JCEU, B 39 220-225.pdf-
- Chaos theory
- Correlation dimension
-
(و 4 مورد دیگر)
برچسب زده شده با :