We examine logical systems with generalized quantifiers, for expressing and reasoning about assertions with 'generally'. The primary motivation is a qualitative, rather than quantitative, approach to some vague notions. Assertions and arguments involving notions, such as 'generally', 'most', 'many', etc., occur often in ordinary language and in some branches of science. Filters can be used for ...

A prominent meridional oscillation of tropical cyclone (TC) activity in the western North Pacific (WNP) during past 110 years is identified this paper. Based on best-track TC data, first three Empirical Orthogonal Functions occurrence frequency generally show a northeast-southwest dipole, with major loadings over South China Sea (SCS) and area near Japan. During periods 1951–1963 1997–2019, low...