  In this short communication, I gave a generalization of measurement postulate
in quantum mechanics. It is regarding the case with partial measurement,
namely, measurement on only part of a wave function. Upon a partial
measurement, the wavefunction will either collapse in one of the eigenstate
covered by the measured partial wavefunction; or collapses out of the measured
part and shifts to the unmeasured part. An explanation in the WISE
(Wavefunction Is System Entity) interpretation is given.
