Mixed matrix membranes containing metal-organic frameworks have attracted large attention owing to the combined advantages of high separation performance and easy processability. In this work, CO2-philic zirconium metal organic framework UiO-66 and UiO-66-NH2 nanocrystals were synthesized and embedded into polyether block amide (PEBA) polymer membranes for CO2 separation. It can be found that a...

In many applications of Independent Component Analysis (ICA) and Blind Source Separation (BSS) estimated sources signals and the mixing or separating matrices have some special structure or some constraints are imposed for the matrices such as symmetries, orthogonality, non-negativity, sparseness and specified invariant norm of the separating matrix. In this paper we present several algorithms ...

This paper proposes a layered nonnegative matrix factorization (L-NMF) algorithm for speech separation. The standard NMF method extracts parts-based bases out of nonnegative training data and is often used to separate mixed spectrograms. The proposed L-NMF algorithm comprises of several layers of standard NMF blocks. During training, each layer of the L-NMF is initialized separately and then fi...

Repetition is a fundamental element in generating and perceiving structure in music. Recent work has applied this principle to separate the musical background from the vocal foreground in a mixture, by simply extracting the underlying repeating structure. While existing methods are effective, they depend on an assumption of periodically repeating patterns. In this work, we generalize the repeti...

The eigenvalue density for members of the Gaussian orthogonal and unitary ensembles follows the Wigner semi-circle law. If the Gaussian entries are all shifted by a constant amount c/(2N)1/2, where N is the size of the matrix, in the large N limit a single eigenvalue will separate from the support of the Wigner semi-circle provided c > 1. In this study, using an asymptotic analysis of the secul...

Blind source separation based on spatial time-frequency distributions (STFDs) has been recently introduced. This method provides improved performance over blind source separation methods based on second-order statistics, when dealing with nonstationary signals that are localizable in the time-frequency domain. In the STFD method, the covariance matrix is rst used to whiten the signal vector, th...

We have generalized the microscopic polymer reference interaction site model (PRISM) theory to study the structure and phase behavior of polymer-tethered spherical nanoparticles in a dense homopolymer melt. In the absence of a polymer matrix, fluids of such hybrid nanoparticles show strong concentration fluctuations indicative of aggregate formation and/or a tendency for microphase separation a...

The separation of PSP toxins using liquid chromatography with a post-column oxidation fluorescence detection method was performed with different matrices. The separation of PSP toxins depends on several factors, and it is crucial to take into account the presence of interfering matrix peaks to produce a good separation. The matrix peaks are not always the same, which is a significant issue when...