Disclosed herein is a process for recovering diphosphite-containing compounds from a mixture comprising diphosphite-containing compounds and organic dinitriles and Lewis acid, using liquid-liquid extraction, wherein the molar ratio of organic mononitrile present to organic dinitrile from about 0. The method further includes determining, at the computing system, a plurality of landmark candidates from the plurality of potential landmark candidates and corresponding signal measurements. Compared with existing manufacturing techniques, it can reduce one time of lamination operation, and dramatically decrease the thickness and weight of the electromagnetic structure, so that it can meet the need of lightness and thinness, for touch-control display equipments, like cellphone. When devices in the presence management system communicate information for thousands of contacts, employing mapped values to navigate the hierarchical extensible contact structure reduces the size of the messages, thus reducing resource consumption, particularly on the scale of an enterprise. The disclosed method involves the mapping of binary strings of data to matrix products of the kind obtained by left-multiplying an initial TM matrix by an ordered multiplicative sequence of exponentiated TT unitary matrices, referred to as generator matrices.