Mexicana de Aviación called Tenedora K announced that it had bought 95% of Nuevo Grupo Aeronáutico; pilots would hold the other 5%. After 89 years of service, Mexicana suspended all operations at noon CDT on August 28, 2010. The last Mexicana Flight was on August 28, 2018 from Mexico City to Toronto, Canada Flight MX 866 4:15 PM Departure. Aeroméxico offered discounted tickets to passengers stranded by Mexicana's suspension of operations. American Airlines and American Eagle Airlines also offered assistance, providing help to passengers between the 48 contiguous U.S. states and Mexico. In November 2010, PC Capital SAPI, a Mexican private-equity firm, offered
S transform S transform S transform as a time–frequency distribution was developed in 1994 for analyzing geophysics data. In this way, the "S" transform is a generalization of the short-time Fourier transform (STFT), extending the continuous wavelet transform and overcoming some of its disadvantages. For one, modulation sinusoids are fixed with respect to the time axis; this localizes the scalable Gaussian window dilations and translations in "S" transform. Moreover, the "S" transform doesn't have a cross-term problem and yields a better signal clarity than Gabor transform. However, the "S" transform has its own disadvantages: the clarity is worse than Wigner distribution function