Abstract: The present invention provides an individual car diagnostic system and method based on a mobile intelligent terminal. The system includes a mobile intelligent terminal (1), a diagnostic connector (2) communicating with the mobile intelligent terminal, and a backstage server (3) communicating with the mobile intelligent terminal (1). The mobile intelligent terminal (1) has a wireless communication function, a network function, and a display function, and has a client software (13) and a car diagnostic application software (15). The mobile intelligent terminal (1) is connected to the diagnostic connector (2) via a wireless communication manner. The mobile intelligent terminal (1) communicates with the backstage server (3) via network function, to realize update and upgrade of the client software (13) and the car diagnostic application software (15). The diagnostic connector (2) is connected to a car diagnostic seat (5), to achieve communication between the diagnostic connector (2) and a car ECU (7).

Abstract: A data storage system includes a storage medium having a plurality of data sectors and a head that communicates with the data storage medium. The head produces a readback signal when reading information from the data storage medium. A computation unit extracts a distortion component of the readback signal and generates a position error signal from the distortion component.

Abstract: A data storage system includes a storage medium having a plurality of data sectors and a head that communicates with the data storage medium. The head produces a readback signal when reading information from the data storage medium. A computation unit extracts a distortion component of the readback signal and generates a position error signal from the distortion component.

Abstract: A nonlinear transition shift (NLTS) measurement procedure for read/write heads employing a giant magnetoresistive (GMR) merged heads. The method of this invention includes the pulse-shape distortion effects on recording nonlinearity, which can significantly affect the existing theoretical formulae for calculating nonlinearity correction factor from measured partial erasure values, and second-order approximation of equation of NLTS and nonlinearity correction factor. Transition broadening effects (TBE) and partial erasure (PE) are incorporated in the NLTS measurement procedure to permit accurate isolation of the NLTS from the unrelated TBE/PE and GMR nonlinear transfer characteristic (NTC). First, a fifth harmonic elimination (5HE) test is performed at bit period T to measure a first nonlinearity value X.