Abstract: A system and method of recognizing a hard disk movement, the system and method including recognizing hard disk information recorded in a hard disk in response to the hard disk being moved to a slot in a hard disk array, determining the movement type of the hard disk based on the recognized hard disk information, judging validity of the hard disk movement based on the movement type, and updating the hard disk information of the hard disk in response to the hard disk movement being judged as valid, wherein the hard disk information comprises position information of the hard disk in the hard disk array.

Abstract: A tool with a transmission assembly having a reduction gearset and a speed selector. The speed selector has a member, an actuator and a shifter assembly. The member is movable between a first position, in which the member is non-rotatable, and a second position in which the member is coupled to a planet carrier of the reduction gearset for common rotation. The actuator includes a pivoting yoke and a follower that is coupled to the yoke. The follower engages the member so as to be axially movable with the follower. The shifter assembly has a selector switch, a switch fork, and a pair of springs. The selector switch is slidable between a first switch position and a second switch position. The switch fork is slidably coupled to the selector switch and receives the yoke. The springs cooperate to bias the switch fork relative to the selector switch into a neutral position.

Abstract: The present disclosure provides a backlight module and a display device. The backlight module includes a tight source layer, a light guiding layer and a dotted layer, a plurality of light emitting units is arranged on the light source layer; a plurality of reflective prism units is arranged on one side of the light guiding layer away from the light source layer, and positions of the plurality of reflective prism units are corresponding to the plurality of light emitting units respectively; the reflective prism unit is configured to reflect a light emitted by the light emitting unit into the light guiding layer and cause total reflection of the reflected light within the light guiding layer; and an optical structure for extracting light from the light guiding layer is provided with the dotted layer.

Abstract: The present disclosure relates to an intelligent traffic cloud control system; by making full use of technologies such as cloud computing, edge computing, big data, and artificial intelligence, the present disclosure proposes a technical architecture of a cloud-edge-end cooperative road traffic cloud control platform, which can overcome the defects of the technical architecture of existing road traffic operation management and monitoring systems. The highway cloud control platform designed and developed based on this technical architecture can improve the operational efficiency of the road network under the premise of ensuring safety, so that highway users can obtain more timely, effective, and personalized driving and traveling assistance information; moreover, practical applications such as vehicle-road cooperative autonomous driving and other functions are supported.

Abstract: Embodiments of the present disclosure relate to methods and apparatuses for data copy. A method comprises receiving, from a client module in a first processing unit, a read request for reading data from a first storage region. The method further comprises, in response to determining from the read request that the data is to be copied, obtaining, from a cache, a first bitmap associated with the first storage region, the first bitmap indicating if the first storage region is filled with zero. The method further comprises, in response to determining from the first bitmap that the first storage region is filled with zero, sending, to the client module, an indication that the data is zero.

Abstract: Techniques are directed to managing Redundant Array of Independent Disks (RAID) storage space. One technique involves providing, by RAID circuitry, a storage space request to mapper circuitry; receiving, by the RAID circuitry, a storage space reply from the mapper circuitry in response to the storage space request; and performing, by the RAID circuitry, a follow-up operation based on the storage space reply from the mapper circuitry. Another technique involves, receiving, by mapper circuitry, a storage space request from RAID circuitry; performing, by the mapper circuitry, a storage space management operation in response to the storage space request; and providing, by the mapper circuitry, a storage space reply to the RAID circuitry, the storage space reply identifying a result of the storage space management operation.

Abstract: Techniques for information update involve: updating, at a first node, first information in a first memory and second information associated with the first information, wherein the first information needs to be persistently stored, and the second information can be obtained from the first information and does not need to be stored persistently; storing the updated first information and the updated second information into a first region and a second region of a first persistent storage device, respectively; synchronizing the updated first information and the updated second information to a second node; and validating the updated first information stored in the first region and invalidating the updated second information stored in the second region based on a determination that the synchronization is successful. Such techniques can achieve incremental update of non-persistent information, thereby improving system performance.

Abstract: A method of managing operation of a data storage system (DSS) is provided. The method includes (a) reserving space within a dedicated metadata storage region (DMSR); (b) in response to determining that accommodating a storage request requires use of the reserved space, entering a restricted write mode; (c) while operating in the restricted write mode, using the reserved space in a process that frees space within the DMSR outside the reserved space; and (d) exiting the restricted mode in response to freeing space within the DMSR outside the reserved space. An apparatus, system, and computer program product for performing a similar method are also provided.

Abstract: Techniques involve: determining, according to a received request for creating a stripe in a storage system, a type of the stripe; acquiring a first workload distribution corresponding to the determined type, wherein the first workload distribution describes the distribution, among a first number of storage devices, of multiple extents in a set of stripes of this type in the storage system; selecting a set of extents from the first number of storage devices based on the first workload distribution, so that the distribution, among the first number of storage devices, of the selected set of extents and the multiple extents in the set of stripes of this type satisfies a preset distribution condition associated with the type; and using the selected set of extents to create the requested stripe based on a stripe creation rule associated with the type. The stripes can be managed in a more effective manner.

Abstract: Techniques involve: determining, according to a determination that a performance level of a target storage unit is lower than a threshold level, whether idle disk slices that can be used for reconstructing malfunctioning disk slices in the target storage unit exist in a slice pool; determining a priority of the target storage unit according to a determination that the idle disk slices do not exist; and selecting replacing disk slices for reconstructing the malfunctioning disk slices from available storage units based at least in part on the priority, wherein the available storage units have performance levels not lower than the threshold level. In this way, data loss due to the off-line of storage units is prevented; and meanwhile, the performance of the entire storage system can be globally stabilized.

Abstract: Techniques for generating merge-friendly sequential IO patterns in shared logger page descriptor (PD) tiers. The techniques can be employed in an active-active clustered system that includes a primary storage node, a secondary storage node, a logger shared between the primary and secondary storage nodes, and a storage device such as a non-volatile memory (NVM) device. The techniques can include allocating at least a first trunk and a second trunk in a shared PD tier of the logger, sequentially writing PD metadata and/or data by the primary storage node and the secondary storage node to the first trunk and the second trunk, respectively, merging the PD metadata/data units sequentially written to each respective trunk together to obtain PD metadata/data having an increased size up to the size of the respective trunks, and storing the merged PD metadata/data to the NVM device.

Abstract: The present disclosure provides an optical device, a module, an apparatus and a system for fingerprint identification. The optical device includes: a first lens array including a plurality of first lenses; a second lens array opposite to the first lens array, including a plurality of second lenses; and a light shielding element between the first lens array and the second lens array, the light shielding element including a plurality of light-transmitting apertures. Image focal planes of the plurality of second lenses, object focal planes of the plurality of first lenses, and the light shielding element are coplanar. The plurality of first lenses are in one-to-one correspondence with the plurality of second lenses and the plurality of light-transmitting apertures, respectively.

Abstract: Example implementations described herein involve a multi-layer hybrid model power generation prediction method and computing system. The example implementations described herein are configured to predict power generation that can be utilized for short-term planning by utilities to optimize operation planning to ensure economic and stable operation of the electricity.

Abstract: Techniques manage a redundant array of independent disks. In such a technique, an instruction to expand the RAID is received, the RAID being formed by a first group of storage devices and including a first group of RAID extents. A second group of RAID extents created on a second group of storage devices and logical units are created on the second group of RAID extents. In response to receiving an indication for a failure of the creation of the second group of RAID extents or the logical units, a notification is generated for indicating a failure of the expansion of the RAID without triggering a shuffling operation, the shuffling operation causing storage extents in the first and second groups of RAID extents to be distributed in the first and second groups of storage devices.

Abstract: Techniques involve: in response to receiving an access request for a logical address, determining a first virtual storage unit and a first offset within the first virtual storage unit corresponding to the logical address; determining a first set of virtual storage units to which the first virtual storage unit belongs and a position of the first virtual storage unit, determining, from the plurality of physical storage units corresponding to the first set of virtual storage units and based on the position and the first offset, a physical storage unit and a second offset within the physical storage unit corresponding to the logical address; and performing, based on an identifier of the physical storage unit and the second offset, a data access operation requested by the access request. Accordingly, I/O loads on a plurality of disks can be balanced, thereby improving overall performance of a storage system.

Abstract: A texture recognition device and a self-luminous display panel. The texture recognition device includes a substrate, an optical sensing layer, and a light-blocking structure. The optical sensing layer and the light-blocking structure are stacked on the substrate. The light-blocking structure includes a plurality of light transmission hole groups, at least one of which includes C2 light transmission holes. C is a positive integer. The optical sensing layer includes multiple optical sensing groups. The multiple optical sensing groups corresponds to the multiple light transmission hole groups respectively. An orthogonal projection of one optical sensing group on the substrate completely covers an orthogonal projection of a corresponding light transmission hole group on the substrate, and an orthogonal projection of a center of the optical sensing group on the substrate coincides with an orthogonal projection of a center of the corresponding light transmission hole group on the substrate.

Abstract: A multi-core sensor system in taxi roof light is provided. The multi-core sensor system can intelligently determine whether the change is caused by the sub-sensor failure or sudden pollution, when the data detected by the sub-sensor suddenly changes dramatically, so as to increase the reliability of detection data of the sub-sensor. The multi-core sensor system can automatically determine whether the repair is needed when a device fault occurs, thereby ensuring the continuity of the sub-sensor detection data; which has significant value for continuous monitoring required for a haze treatment operation. In addition, human and material resources for device maintenance may be saved, thereby reducing waste.

Abstract: Techniques involve determining whether data read from a redundant array of independent disks (RAID) is corrupted, the RAID including two parity disks. The techniques further involve determining, based on the read data being corrupted, whether single-disk data recovery can recover the corrupted data. The techniques further involve recovering, based on the single-disk data recovery failing to recover the corrupted data, the corrupted data using dual-disk data recovery. Such techniques may present a recovery solution for silent data corruption of a RAID with two parity disks, such that corrupted data can be recovered in the case of either a single-disk failure or a dual-disk failure, thereby improving the storage system performance.

Abstract: A light guide structure is disclosed. The light guide structure includes a first waveguide layer having a first light incident surface and a first light exiting surface. The light guide structure includes a polarization beam-splitting structure on the first light exiting surface, configured to split light into first polarized light and second polarized light. The light guide structure includes a first polarization coupling grating disposed on the first light incident surface and configured to deflect the first polarized light, and a second waveguide layer having a second light incident surface and a second light exiting surface and disposed on the polarization beam-splitting structure. The light guide structure includes a second polarization coupling grating disposed between the second light incident surface and the polarization beam-splitting structure and configured to deflect the second polarized light.

Abstract: A method for controlling lane changing of a vehicle, including: receiving a lane changing instruction (step 101); acquiring a speed parameter of the vehicle (step 102); according to the speed parameter, determining a controlling coefficient of a predetermined controller (step 103); acquiring a position-deviation parameter and a heading-angle parameter of the vehicle; if the position-deviation parameter is greater than or equal to a first threshold, or, if the heading-angle parameter is greater than or equal to a second threshold, according to the controlling coefficient, the position-deviation parameter and the heading-angle parameter, determining a target steering-wheel steering angle of the vehicle; and according to the target steering-wheel steering angle, controlling the vehicle to perform a lane changing operation, till the position-deviation parameter is less than the first threshold, and the heading-angle parameter is less than the second threshold (step 105).