Eight different types of nanostructured perovskites based on YCoO 3 with different chemical compositions are prepared as gas sensor materials, and they are studied with two target gases NO 2 and CO. Moreover, a statistical approach is adopted to optimize their performance. The innovative contribution is carried out through a split-plot design planning and modeling, also involving random effects...

This study suggests a stochastic model for time series of daily-zonal (circumpolar) mean stratospheric temperature at given pressure level. It can be seen as an extension previous studies which have developed models surface temperatures. The proposed is sum deterministic seasonality function and L\'evy-driven multidimensional Ornstein-Uhlenbeck process, mean-reverting process. More specifically...