Abstract: A method of the present invention is a method of inferring a content ratio of a component in a sample containing a component selected from K types, including: heating a sample set, ionizing resultant gas components sequentially, and observing mass spectra continuously; acquiring two-dimensional mass spectra of the respective samples from the mass spectra, and merging two or more of these spectra to acquire a data matrix; performing non-negative matrix factorization on the data matrix; correcting an intensity distribution matrix through analysis on canonical correlation between a base spectrum matrix and the data matrix; acquiring a feature vector from a corrected intensity distribution matrix and expressing the sample in vector space; defining a K-1 dimensional simplex and determining an end member; and inferring a content ratio of the component in the sample on the basis of the end member and the feature vector.

Abstract: Asymmetric films, methods of making asymmetric films, and uses of asymmetric films. A method may include using at least two different solvents and at least one homopolymer and at least one block copolymer that can undergo self assembly, where the solvents are immiscible and have different surface tension, where, on film formation, all or substantially all of the block copolymer(s) migrate to an exterior surface of the homopolymer. The asymmetric films may include an isoporous region or layer and an asymmetric region or layer, where the asymmetric region does not include 10 percent by weight or more of the multiblock copolymer(s) and/or the isoporous region/layer and the asymmetric pore region/layer are not independently (or separately) formed and/or not laminated together to form the asymmetric film. The films can be used in devices, such as, for example, filtration devices.