Abstract: The present disclosure relates to a method for preparing a self-cleaning anti-icing coating based on brushlike organosilicon. In this method, a brushlike organosilicon-modified polyurethane coating is prepared by subjecting a thiolactone, a diamine compound and monovinyl-terminated polydimethylsiloxane to a simple multi-component click reaction to obtain a dihydroxy-terminated block, and introducing the dihydroxy-terminated block into a polyurethane matrix.

Abstract: The present disclosure relates to a method for preparing a self-cleaning anti-icing coating based on brushlike organosilicon. In this method, a brushlike organosilicon-modified polyurethane coating is prepared by subjecting a thiolactone, a diamine compound and monovinyl-terminated polydimethylsiloxane to a simple multi-component click reaction to obtain a dihydroxy-terminated block, and introducing the dihydroxy-terminated block into a polyurethane matrix.

Abstract: A method and apparatus for downloading data. The method comprises: dividing a storage space for storing data into multiple storage subspaces in advance; if it is determined that a download progress bar is dragged from a first position to a second position, obtaining an offset of a download position; determining, according to the offset of the download position and the size of the storage subspaces, a selected storage subspace and an invalid data area in the selected storage subspace; and filling the invalid data area and writing, starting from the second position, the data into the selected storage subspace. By using the method and apparatus thereof, a filling space for storing data can be reduced, thereby improving the data downloading speed, and improving use experience of a user.

Abstract: The present application discloses a method and an apparatus for obtaining structured information in a fixed layout document to improve the structuring speed for information management of a fixed layout document. The method may comprise: determining initial page number information corresponding to current directory entry of the document; segmenting first article content of a page corresponding to the initial page number information into at least one structured-characters-block; searching in each structured-characters-block for a first structured-characters-block which matches with name strings of the current directory entry, and obtaining first position information about where the first structured-characters-block is located in the first article content; and obtaining initial position information of the current directory entry and end position information of the previous directory entry based on the first position information.

Abstract: A method and apparatus for downloading data. The method comprises: dividing a storage space for storing data into multiple storage subspaces in advance; if it is determined that a download progress bar is dragged from a first position to a second position, obtaining an offset of a download position; determining, according to the offset of the download position and the size of the storage subspaces, a selected storage subspace and an invalid data area in the selected storage subspace; and filling the invalid data area and writing, starting from the second position, the data into the selected storage subspace. By using the method and apparatus thereof, a filling space for storing data can be reduced, thereby improving the data downloading speed, and improving use experience of a user.

Abstract: A disk drive is disclosed comprising a head actuated over a disk comprising a plurality of tracks, wherein each track comprises a plurality of data sectors. A test pattern is written to at least one data sector in at least one track, and the test pattern is read from the disk to generate a noisy read signal comprising added noise. An estimated data sequence is detected from the noisy read signal, and an amplitude of the added noise is increased until a failure detection metric reaches a metric threshold. A failure threshold is generated based on the amplitude of the added noise when the failure detection metric reaches the metric threshold, and a failure condition of the disk drive is predicted based on the failure threshold.

Abstract: Systems and methods for performing a defect scan of a disk are provided. In one embodiment, a disk drive comprising a disk, a head configured to read an area of the disk to generate a read signal, and read channel circuitry configured to receive the read signal from the head, perform channel statistic measurements on the read signal, and to generate a Channel Statistic Metric (CSM) flag based on the channel statistic measurements. The disk drive further comprises defect scan circuitry configured to receive the CSM flag from the read channel circuitry, to accumulate the CSM flag to obtain an accumulated CSM flag value and to detect a defect area on the disk based on the accumulated CSM flag value.

Abstract: A disk drive is disclosed comprising a disk, a head for writing data to the disk, and control circuitry coupled to the head. The control circuitry is operable to write data to the plurality of data tracks, read a first data area of a first data track to generate a first read back signal, determine a first quality metric and a channel flag in response to the first read back signal, determine that the first quality metric exceeds a first threshold, apply additional stress to the first data area, reread the first data area to generate a second read back signal, determine a second quality metric in response to the second read back signal, and determine whether the second quality metric exceeds a second threshold.

Abstract: Various embodiments are disclosed that control head fly height based on estimates of head fly height. The fly height clearance between the head and a data storage media is estimated. Heating of the head by a heater element is then regulated in response to the estimated fly height.

Abstract: Various embodiments are disclosed that control head fly height based on estimates of head fly height. The fly height clearance between the head and a data storage media is estimated. Heating of the head by a heater element is then regulated in response to the estimated fly height.