A duct to receive duct wrap is provided with a plurality of posts at different locations on and upstanding from the post to protrude through the duct wrap. The treating unit is constructed by a cage-shaped supporting structure which defines an interior space for containing the microbial cell therein. The model may be interpreted in a look-ahead mode, wherein different possible branches of the model are interpreted so as to obtain resource requirement predictions for the application after completion of the present step. The thin-film electrodes have multi-function capabilities including, for instance, heating, temperature sensing, andor sample actuation. The method includes maintaining the magnetic source and the production rate of the hydrocarbon fluid such that within the distance from the magnetic source the production fluid drag force is less than or equal to the continuous repulsive magnetic force. The detection circuit and AGC circuit generates an RF control signal Sf1 and IF control signal Sf2 from the input intermediate frequency signal Sa, and controls an RF control circuit and IF control circuit by outputting the generated RF control signal Sf1 and IF control signal Sf2 to the RF control circuit and IF control circuit.