A problem to be solved is to provide a pattern matching system and the like which can match patterns including time change with high accuracy and safety. The compounds are useful for the treatment andor prevention of diseases which are associated with the modulation of H3 receptors. The case of ECU is fixed to a surge tank so that a pressure introduction outlet formed in the surge tank communicates directly with the pressure introduction inlet. A programmable switch within each node connects one of the input ports to one of the output ports in response to connection information stored in a memory in that node. The power source also has a circuit for detecting the voltage that the terminals of each switch of the inverter.