Abstract: The present disclosure provides a image searching method and apparatus, an apparatus and a non-volatile computer storage medium. The method comprises: acquiring a image to be searched and search intention information with respect to the image to be searched; obtaining a search result according to the image to be searched and the search intention information. The present disclosure may improve the efficiency in acquiring useful information from the search results.

Abstract: The present disclosure provides a search result optimizing method, a search engine, an apparatus and a non-volatile computer storage medium. The optimizing method comprises: acquiring a user's search demand description information; acquiring an initial search result and search demand optimization information according to the search demand description information; according to the search demand optimization information selected by the user, performing optimization processing for the initial search result to obtain a final search result. The present disclosure may improve an accuracy of the search result.

Abstract: A disk drive is disclosed comprising a head and a disk comprising a plurality of servo tracks, wherein each servo track comprises a plurality of servo sectors. The disk drive further comprises control circuitry comprising a servo control system operable to actuate the head over the disk in response to the servo sectors. The disk is rotated at a first speed and the servo sectors are read at a first servo sample frequency to generate first servo samples. The disk is rotated at a second speed different from the first speed and the servo sectors are read at a second servo sample frequency to generate second servo samples. The second servo samples are processed to measure a frequency response of the servo control system proximate the first servo sample frequency.

Abstract: A disk drive is disclosed comprising a disk including a plurality of servo tracks defined by servo sectors, wherein each servo sector comprises a servo preamble. A head is actuated over the disk, wherein the head is operable to generate a read signal. The disk drive further comprises control circuitry including an analog cutoff filter operable to filter the read signal to generate a filtered read signal. The filtered read signal is sampled to generate read samples. During a normal operating mode, the analog cutoff filter is configured to have a first bandwidth. During a measurement mode, the analog cutoff filter is configured to have a second bandwidth greater than the first bandwidth, and the read samples representing at least part of the servo preamble are processed to measure a signal-to-noise ratio (SNR) and/or a fly height of the head.