Abstract: The present disclosure provides methods and apparatus for calibrating cost estimator for trustworthy DBMS performance. An aspect of the disclosure provides for a method, which includes generating a plurality of plans for potential execution by a DBMS, each of the plurality of plans being configured to generate a same response to a same specified database query. The method further includes generating, for each plan, a set of probability-cost value pairs, each indicative of an estimated upper cost for said plan and a probability that a cost for said plan will be equal to or less than said estimated upper cost, if and when said plan is executed. The method further includes selecting one of the plurality of plans based at least in part on an evaluation of the sets of probability-cost value pairs for the plurality of plans, and causing the DBMS to execute the selected plan.

Abstract: The present disclosure provides a method of reading data maintained in a tree data structure, such as B+ tree, using near data processing (NDP) in a cloud native database. According to embodiments, a desired LSN will be used in NDP page reads on the master computing node (e.g. master SQL node). When the master computing node (e.g. master SQL node) reads the regular page, the maximum desired LSN (e.g. the latest page version number) for that regular page will be used. Embodiments use features of the desired LSN and page locking, wherein correct versions of pages can be obtained by using the desired LSN associated with a page, in combination with page locking, and can enable the reading of a consistent tree structure and achieve good read/write concurrency.

Abstract: The present disclosure relates to the field of biotechnology, in particular, to a combination product for detecting DNA. The product includes ribonuclease H II and a probe; the probe is a single-stranded probe and has a sequence which can be partially or entirely complementary to a target DNA molecule to be detected, and one or more RNA bases are embedded in the complementary region of the probe and divide the complementary region of the probe into at least two segments, each of which independently has DNA bases and base substitutions of less than or equal to 13 in total.

Abstract: Methods, processing units, and computer-readable media in a cloud-based database are described. Redo log records are applied to a page at a database replica only when an updated version of the page is requested at the database replica. A log cache may be used by a replica node of the database to track recent redo log records applicable to a given page. The recent redo log records stored in the log cache may be applied to update the page on-demand when an updated version of the page is requested. By applying only the redo log records applicable to pages that are currently being requested, processing resources may be used only to generate pages that are currently required. Methods for registering redo log records into the log cache by the master or replica server are also described.

Abstract: A smart toilet (100) includes an information acquisition device (110) and a control device (120). The information acquisition device (110) is configured to acquire feature information of the smart toilet (100) in a working state, the feature information at least including voiceprint information and odor information, or voiceprint information, or odor information of a human body using the smart toilet (100). The control device (120) includes an identity recognition component (121) configured to recognize, according to the feature information, the identity of the human body using the smart toilet (100). An electric appliance system including the smart toilet (100) is further included.

Abstract: Methods and systems are described for managing a shared database. One or more processing nodes may access a shared database. A common log node may manage the shared database. The common log node may validate database operations requested by the one or more processing nodes. During validation, the common log node may detect conflicts that occur between database operations requested by the one or more processing nodes.

Abstract: The present disclosure provides a semiconductor structure and a method of forming the same. The semiconductor structure includes: a substrate doped with a first ion, a deep trench structure disposed in the substrate, a barrier doped region disposed on a top of the substrate and the deep trench structure, a first epitaxial layer disposed on the barrier doped region, a body region disposed in the first epitaxial layer, a source region disposed in the body region, a gate structure disposed in the first epitaxial layer, and a collector region disposed at a bottom of the substrate. By means of the semiconductor structure, performance of an insulated gate bipolar transistor can be improved.

Abstract: An IGBT device and a method for manufacturing it, the device includes a super junction structure that has several N-type pillars and P-type pillars arranged alternately; a cell unit that is located in an N-type epitaxial layer, and the N-type epitaxial layer is located above the N-type substrate; each cell unit includes a trench gate, a P-type body region, and a source region; an N-type carrier injection layer, the N-type carrier injection layer is located in the N-type epitaxial layer, and the N-type carrier injection layer is spaced apart from the N-type substrate by the N-type epitaxial layer; the bottom of the P-type body region is located in the N-type carrier injection layer; and a collector region that is located at the bottom of the N-type substrate.

Abstract: Disclosed by the present disclosure is a refrigerant leak detection method and device for an air conditioner. The method includes: acquiring current operating parameters of an air conditioner and environment information of a surrounding environment of the air conditioner; inputting the current operating parameters and the environment information into a trained neural network model to obtain an amount of remaining refrigerant outputted by the neural network model; and determining, according to the amount of the remaining refrigerant, whether there is a refrigerant leak in the air conditioner. The present disclosure improves accuracy of detecting a refrigerant leak in the air conditioner by means of an artificial neural network algorithm.

Abstract: Methods and apparatuses in a cloud-based database management system are described. Data in a database are stored in a plurality of pages in a page store of the database. A plurality of redo log records are received to be applied to the database. The redo log records within a predefined boundary are parsed to determine, for each given redo log record, a corresponding page to which the given log record is to be applied. The redo log records are reordered by corresponding page. The reordered redo log records are stored to be applied to the page store of the database.

Abstract: Example optical connector ferrules and example optical connectors are provided. An example optical connector ferrule is a first ferrule of an optical connector, where the first ferrule includes n optical channels, and the first ferrule is configured to be compatible with a second ferrule. The second ferrule includes m optical channels, where both m and n are positive integers, and n is greater than m. The n optical channels of the first ferrule include first-type optical channels and second-type optical channels, where an arrangement manner of the first-type optical channels is the same as that of the m optical channels of the second ferrule, and at least one of the second-type optical channels is located in at least one of rows in which the first-type optical channels are located.

Abstract: Intelligent systems are disclosed that respond to user intent and desires based upon activity that may or may not be expressly directed at the intelligent system. In some embodiments, the intelligent system acquires a depth image of a scene surrounding the system. A scene geometry may be extracted from the depth image and elements of the scene may be monitored. In certain embodiments, user activity in the scene is monitored and analyzed to infer user desires or intent with respect to the system. The interpretation of the user's intent as well as the system's response may be affected by the scene geometry surrounding the user and/or the system. In some embodiments, techniques and systems are disclosed for interpreting express user communication, e.g., expressed through hand gesture movements. In some embodiments, such gesture movements may be interpreted based on real-time depth information obtained from, e.g., optical or non-optical type depth sensors.

Abstract: A cable assembly, a signal transmission structure, and an electronic device are provided. The signal transmission structure includes a circuit board (2), a chip (1), and a cable assembly (3). The chip (1) is assembled on one side of the circuit board (2), and the cable assembly (3) is assembled on the other side of the circuit board (2). The cable assembly (3) includes a cable (31), and the circuit board (2) includes a plurality of conductive holes (22). The chip (1) is electrically connected to the cable (31) of the cable assembly (3) by using the conductive hole (22), to transmit a signal of the chip (1) by using the cable (31). In this technical solution, wires do not need to be disposed in a large area inside the circuit board (2).

Abstract: A split-type device for measuring rock mass deformation under high hydraulic pressure and a construction method and use thereof. Main components of the device include a metal measuring rod, a magnetic iron core, a shell, a waterproof coil framework, a coil, a tail accessory, a cable clamp, a cable, a signal processing bin, etc. Main electronic components are treated by adopting the all-metal shell and a vacuum particle sealing double-layer sealing process, and have hydraulic pressure resistance of 5 MPa or above. Measurement signals feature centralized processing, digitization and dual utilization of signals, i.e., after data of a plurality of sensors is processed in an electronic bin and then digitized signals are connected to an independent reader outside the bin or a centralized acquisition device for in-situ tests.

Abstract: Disclosed are a method for controlling smart home and a device for controlling smart home. The method includes the following steps: a demand database and a habit database of a user for home appliances are built; according to the built demand database, demand models of different users are trained by using a neural network, and the demands of the users during different periods of time are predicted; and according to the built habit database and a prediction regarding the demands of the users, a home appliance execution policy conforming to the habits of the users are output by using a probability statistical algorithm, and the corresponding home appliances are controlled in advance.

Abstract: A tungsten-base alloy material and a preparation method therefor. The preparation method comprises: 1) evenly grinding composite powder containing tungsten and zirconium oxide, and then performing annealing treatment at 700-1000° C. to obtain powder A; and 2) grinding and then compression moulding the powder A, and then performing liquid-phase sintering to obtain a tungsten-base alloy blank so as to obtain the tungsten-base alloy material.

Abstract: The disclosure belongs to the technical field of integrated navigation under non-ideal conditions, and in particular relates to a robust filtering method for integrated navigation based on a statistical similarity measure (SSM). In view of the situation that there are normal beam measurement information of the DVL and beam measurement information with a large error simultaneously in a SINS/DVL tightly integrated system, and aiming at the problem that the existing robust filters of an integrated navigation system process the measurement information in a rough manner and are likely to lead to loss of normal measurement information, the disclosure proposes a novel robust filtering method based on decomposition of multi-dimensional measurement equations and the SSM.

Abstract: Methods and systems of managing a resource in a distributed resource management system can include: receiving a resource request by at least one processor in the distributed resource management system, the resource request identifying a requested resource type corresponding to at least one of: a class identifier identifying a resource class assigned to a composite resource, and a class identifier identifying at least one additional resource associated with the composite resource; determining availability of the requested resource type; and scheduling a workload associated with the resource request for execution based on the determination.

Abstract: The present disclosure provides a method of reading data maintained in a tree data structure, such as B+ tree, using near data processing (NDP) in a cloud native database. According to embodiments, a desired LSN will be used in NDP page reads on the master computing node (e.g. master SQL node). When the master computing node (e.g. master SQL node) reads the regular page, the maximum desired LSN (e.g. the latest page version number) for that regular page will be used. Embodiments use features of the desired LSN and page locking, wherein correct versions of pages can be obtained by using the desired LSN associated with a page, in combination with page locking, and can enable the reading of a consistent tree structure and achieve good read/write concurrency.

Abstract: The present disclosure discloses a human detection method and device, an electronic apparatus, and a storage medium. The method includes: a millimeter-wave radar signal of a target environment (101) is obtained; information of a moving point in the target environment (102) is extracted from the millimeter-wave radar signal; a micro-Doppler feature of each target in the target environment (103) is determined according to the information of the moving points in the target environment, wherein the target is formed by at least one moving point; and a target whose category is human in the target environment (104) is identified according to the micro-Doppler feature of each target in the target environment. The millimeter-wave radar technology is combined with artificial intelligence technology, so as to enable human detection in the target environment without invading human privacy, thus providing the possibility of achieving automatic control, monitoring and other operations of the target environment.