A method of hydrogen recovery in refineries and petrochemical operations in which some or all of the feed streams for separate PSA units are combined and utilized as feed for a single PSA unit, and in which some or all of steam reformer product and refinery offgas streams being used as feed streams for separate PSA units are combined and utilized as feed for a single PSA unit. According to an aspect, correlated noise is reduced by coupling the reference inputs of imager amplifiers to common voltage sources. The first locking element is configured with a connector body for engaging and capturing an elongated rod and a transverse rod simultaneously. The weather information extraction may be performed according to a criterion such as extracting the weather information with a certain importance level or higher, extracting the weather information of top n th importance, or the like. An impedance matching network is additionally provided to make the operating frequency of the slot substantially the same as the operating frequency of the wireless communication device.