Abstract: Various embodiments are directed to a radar reflector configured for radar-based distance measurements for determining a position of an elevator car within an elevator shaft. The radar reflector comprises three or more triangular panels defining a pyramidal frustum volume having a base plane and an upper plane that are parallel. The pyramidal frustum volume is configured to directly reflect radar signals originating from a radar transceiver back to the radar transceiver based at least in part on the triangular panels being mutually perpendicular at a projected apex above the upper plane. The reflected radar signals reflected by the radar reflector have substantially parallel trajectories with the original, pre-reflected radar signals emitted by the radar transceiver. The triangular panels of the radar reflector being mutually perpendicular advantageously maintains direct reflection of radar signals in spite of any potential horizontal tilt of the radar reflector to a certain extent.

Abstract: An image processing method is provided. The method includes obtaining at least two images, the at least two images being based on the same target object captured from different imaging angles, respectively; extracting, by using feature extraction networks included in an image processing model, target features of the at least two images, the feature extraction networks being configured to extract features of images corresponding to the different imaging angles, respectively; and determining, based on the target features, a classification result corresponding to the target object.

Abstract: An image processing method performed by a terminal is provided. A molybdenum target image is obtained, and a plurality of candidate regions are extracted from the molybdenum target image. In the molybdenum target image, a target region is marked in the plurality of candidate regions by using a neural network model obtained by deep learning training, a probability that a lump comprised in the target region is a target lump being greater than a first threshold, a probability that the target lump is a malignant tumor being greater than a second threshold, and the neural network model being used for indicating a mapping relationship between a candidate region and a probability that a lump comprised in the candidate region is the target lump.

Abstract: Provided are an artificial intelligence (AI)-based method and apparatus for training a classification task model, a device, and a storage medium, which relate to the field of machine learning (ML) technologies. The method includes: training an initial feature extractor by using a first dataset to obtain a feature extractor, the first dataset being a class imbalanced dataset; constructing a generative adversarial network, the generative adversarial network including the feature extractor and an initial feature generator; training the generative adversarial network by using second class samples to obtain a feature generator; constructing a classification task model, the classification task model including the feature generator and the feature extractor; and training the classification task model by using the first dataset, the feature generator being configured to augment the second class samples in a feature space in a training process of the classification task model.

Abstract: An image processing method is provided. The method includes obtaining at least two images, the at least two images being based on the same target object captured from different imaging angles, respectively; extracting, by using feature extraction networks included in an image processing model, target features of the at least two images, the feature extraction networks being configured to extract features of images corresponding to the different imaging angles, respectively; and determining, based on the target features, a classification result corresponding to the target object.

Abstract: A jig saw including a clamping mechanism for removably clamping a saw blade and a driving mechanism. The clamping mechanism includes an actuating member and a clamping mechanism, the actuating member is configured to rotate about a first axis, thereby driving the clamping mechanism to achieve locking or unlocking of the saw blade. The actuating member includes an inclined surface extending in a rotation direction of the actuating member. The inclined surface cooperates with the clamping mechanism thereby to drive the clamping mechanism when the actuating member rotates. Since the clamping mechanism of the jig saw uses a clamping mechanism to apply pressure to the saw blade from the side, thereby abutting and fixing it on the main body, such a clamping mechanism therefore can be applied to different types of saw blades, regardless of the shape of the end faces of their clamping ends (e.g., V-shaped or U-shaped).

Abstract: An image processing method performed by a terminal is provided. A molybdenum target image is obtained, and a plurality of candidate regions are extracted from the molybdenum target image. In the molybdenum target image, a target region is marked in the plurality of candidate regions by using a neural network model obtained by deep learning training, a probability that a lump comprised in the target region is a target lump being greater than a first threshold, a probability that the target lump is a malignant tumor being greater than a second threshold, and the neural network model being used for indicating a mapping relationship between a candidate region and a probability that a lump comprised in the candidate region is the target lump.

Abstract: An operating system partition protecting method includes: creating a virtual memory space which is mounted on a first directory; mounting a physical storage space that actually stores a system file of an operating system on a second directory; creating a user-state file system on a mounting point of an operating system partition to be protected, and controlling the user-state file system to monitor a request event of an operation on the file system in the operating system partition; determining a target file corresponding to the request event, accessing the second directory to read a target file in the physical storage space or accessing the first directory to carry out a writing operation on the target file into the virtual memory space. The present disclosure also provides an operating system partition protecting device. The present disclosure can protect a system storage partition, and avoid tampering of system files by malicious programs.

Abstract: A method, computer program product, and system for sparse convolutional neural networks that improves efficiency is described. Multi-bit data for input to a processing element is received at a compaction engine. The multi-bit data is determined to equal zero and a single bit signal is transmitted from the memory interface to the processing element in lieu of the multi-bit data, where the single bit signal indicates that the multi-bit data equals zero. A compacted data sequence for input to a processing element is received by a memory interface. The compacted data sequence is transmitted from the memory interface to an expansion engine. Non-zero values are extracted from the compacted data sequence and zeros are inserted between the non-zero values by the expansion engine to generate an expanded data sequence that is output to the processing element.

Abstract: A method, computer program product, and system for sparse convolutional neural networks that improves efficiency is described. Multi-bit data for input to a processing element is received at a compaction engine. The multi-bit data is determined to equal zero and a single bit signal is transmitted from the memory interface to the processing element in lieu of the multi-bit data, where the single bit signal indicates that the multi-bit data equals zero. A compacted data sequence for input to a processing element is received by a memory interface. The compacted data sequence is transmitted from the memory interface to an expansion engine. Non-zero values are extracted from the compacted data sequence and zeros are inserted between the non-zero values by the expansion engine to generate an expanded data sequence that is output to the processing element.

Abstract: A sandwich structure for enhancement of photoluminescence (PL) from luminescent films and the corresponding preparation method are disclosed. The sandwich structure comprises a support, a luminescent film grown on the support, and a single-layer close-packed microsphere array deposited onto the luminescent film. The microspheres have high transmittance excitation light and emitted light, respectively. The low price of dielectric microspheres is beneficial to industrial applications. The stable chemical properties of dielectric microspheres make PL enhanced in a long term. Both metal and non-metal materials can be used as the support in the sandwich structure. These features significantly improve the technique of PL enhancement for luminescent films.

Abstract: An operating system partition protecting method includes: creating a virtual memory space which is mounted on a first directory; mounting a physical storage space that actually stores a system file of an operating system on a second directory; creating a user-state file system on a mounting point of an operating system partition to be protected, and controlling the user-state file system to monitor a request event of an operation on the file system in the operating system partition; determining a target file corresponding to the request event, accessing the second directory to read a target file in the physical storage space or accessing the first directory to carry out a writing operation on the target file into the virtual memory space. The present disclosure also provides an operating system partition protecting device. The present disclosure can protect a system storage partition, and avoid tampering of system files by malicious programs.

Abstract: This provides a terminal location obtaining method, device, and system. The method includes: a first terminal transmitting a location-obtaining request to a second terminal; the second terminal starting a positioning function to obtain the current location information of the second terminal, and transmitting the obtained location information of the second terminal to the first terminal; the first terminal using the location information of the second terminal as the location information of the first terminal, and performing a location-based application operation based on the location information. This can obtain relatively accurate location information of a terminal when the terminal is incapable of determining its own location when location determination is needed. This can also transmit the location information to a corresponding application server to avoid inaccuracy issues with determining a location based on the IP address of a terminal. This can facilitate an accurate location-based push message service.

Abstract: The present disclosure relates to a method for processing history operation records of an electronic terminal, including: recording, after an application program completes a predetermined operation, an operation record about the predetermined operation, the operation record at least including a target object, an operation time, and an action; performing cluster analysis on the operation records to separately aggregate operation records of each target object; receiving a request for displaying operation records, acquiring a time period which is included in the request and during which operation records to be displayed are located; and displaying, in a first display area according to the request, aggregated operation records of at least one target object during the time period. The foregoing method helps a user quickly find a needed file or folder in history operation records. In addition, the present disclosure further provides an apparatus for processing history operation records of an electronic terminal.

Abstract: A sandwich structure for enhancement of photoluminescence (PL) from luminescent films and the corresponding preparation method are disclosed. The sandwich structure comprises a support, a luminescent film grown on the support, and a close-packed dielectric microsphere monolayer deposited onto the luminescent film. The microspheres have high transmittance excitation light and emitted light, respectively. The low price of dielectric microspheres is beneficial to industrial applications. The stable chemical properties of dielectric microspheres make PL enhanced in a long term. Both metal and non-metal materials can be used as the support in the sandwich structure. These features significantly improve the technique of PL enhancement for luminescent films.

Abstract: A lateral-diffused metal oxide semiconductor device (LDMOS) includes a substrate, a first deep well, at least a field oxide layer, a gate, a second deep well, a first dopant region, a drain and a common source. The substrate has the first deep well which is of a first conductive type. The gate is disposed on the substrate and covers a portion of the field oxide layer. The second deep well having a second conductive type is disposed in the substrate and next to the first deep well. The first dopant region having a second conductive type is disposed in the second deep well. The doping concentration of the first dopant region is higher than the doping concentration of the second deep well.

Abstract: A Schottky diode having a current leakage protection structure includes a Schottky diode unit, a first isolation portion and a second isolation portion. The Schottky diode unit is defined in a substrate and includes a metalized anode, an active region having dopants of first conductive type, a cathode and at least one isolation structure. The first isolation portion having dopants of second conductive type is formed between substrate and active region, and the first isolation portion includes a first well disposed beneath active region, and a first guard ring surrounding active region and connecting to the first well. The second isolation portion having dopants of first conductive type is formed between substrate and the first isolation portion, and the second isolation portion includes a second well disposed beneath the first well, and a second guard ring surrounding the first guard ring and connecting to the second well.

Abstract: This provides a terminal location obtaining method, device, and system. The method includes: a first terminal transmitting a location-obtaining request to a second terminal; the second terminal starting a positioning function to obtain the current location information of the second terminal, and transmitting the obtained location information of the second terminal to the first terminal; the first terminal using the location information of the second terminal as the location information of the first terminal, and performing a location-based application operation based on the location information. This can obtain relatively accurate location information of a terminal when the terminal is incapable of determining its own location when location determination is needed. This can also transmit the location information to a corresponding application server to avoid inaccuracy issues with determining a location based on the IP address of a terminal. This can facilitate an accurate location-based push message service.

Abstract: A lateral-diffused metal oxide semiconductor device (LDMOS) includes a substrate, a first deep well, at least a field oxide layer, a gate, a second deep well, a first dopant region, a drain and a common source. The substrate has the first deep well which is of a first conductive type. The gate is disposed on the substrate and covers a portion of the field oxide layer. The second deep well having a second conductive type is disposed in the substrate and next to the first deep well. The first dopant region having a second conductive type is disposed in the second deep well. The doping concentration of the first dopant region is higher than the doping concentration of the second deep well.

Abstract: The present invention provides a lateral diffused metal-oxide-semiconductor device including a first doped region, a second doped region, a third doped region, a gate structure, and a contact metal. The first doped region and the third doped region have a first conductive type, and the second doped region has a second conductive type. The second doped region, which has a racetrack-shaped layout, is disposed in the first doped region, and has a long axis. The third doped region is disposed in the second doped region. The gate structure is disposed on the first doped region and the second doped region at a side of the third doped region. The contact metal is disposed on the first doped region at a side of the second doped region extending out along the long axis, and is in contact with the first doped region.