TY - JOUR JF - srtc-jsri JO - JSRI VL - 8 IS - 1 PY - 2011 Y1 - 2011/9/01 TI - Evaluation of Tests for Separability and Symmetry of Spatio-temporal Covariance Function TT - ارزیابی آزمون‌های تفکیک‌پذیری و تقارن تابع کوواریانس فضایی- زمانی N2 - In recent years, some investigations have been carried out to examine the assumptions like stationarity, symmetry and separability of spatio-temporal covariance function which would considerably simplify fitting a valid covariance model to the data by parametric and nonparametric methods. In this article, assuming a Gaussian random field, we consider the likelihood ratio separability test, a variety of nonparametric and spectral tests of symmetry and also separability of spatio-temporal covariance function. Comparing the tests of symmetry and separability in a level of scenarios, the best ones would be introduced. SP - 1 EP - 27 AU - Behshad, Elham AU - Mohammadzadeh, Mohsen AD - KW - Spatio-temporal data KW - stationarity KW - symmetry KW - stationary KW - separability UR - http://jsri.srtc.ac.ir/article-1-82-en.html DO - 10.18869/acadpub.jsri.8.1.1 ER -