An exhaust emissions prediction system includes a catalytic device configured to receive a flow of exhaust and a downstream NOx sensor located downstream of the catalytic device. An interface layer included in a gate insulating film of the first MIS transistor has a thickness larger than that of an interface layer included in a gate insulating film of the second MIS transistor. A lubricant is located within the outer member secured therein by inner and outer seals. The mixer 7 mixes intermediate quadrature signal ISQR and the input shift signal SSFT to generate a quadrature signal SQR. The cap body houses a vertically movable plug which can be seated on the tapered top edge of the neck, an elastic member which slides downwardly along the outer surface of the tapered upper portion and fits in the small-diameter portion and engages the shoulder, and a spring biasing the plug downwardly relative to the cap body. Medical staff may make a detailed analysis of the waveform data in real time, which may provide a basis for making decisions in the following therapy processes.