Abstract: Embodiments implement a prediction-driven, rather than a trial-driven, approach to automate database configuration parameter tuning for a database workload. This approach uses machine learning (ML) models to test performance metrics resulting from application of particular database parameters to a database workload, and does not require live trials on the DBMS managing the workload. Specifically, automatic configuration (AC) ML models are trained, using a training corpus that includes information from workloads being run by DBMSs, to predict performance metrics based on workload features and configuration parameter values. The trained AC-ML models predict performance metrics resulting from applying particular configuration parameter values to a given database workload being automatically tuned. Based on correlating changes to configuration parameter values with changes in predicted performance metrics, an optimization algorithm is used to converge to an optimal set of configuration parameters.

Abstract: This disclosure relates to coronavirus vaccines and uses thereof. In one aspect, the disclosure provides a nucleic acid vaccine, comprising a sequence encoding a spike protein or fragment thereof derived from a coronavirus.

Abstract: An antenna device with high component-density but enhanced means of dissipating working heat includes a metal substrate of a wireless device, a coupler, a filter, a conductive layer, and an antenna element. The coupler is disposed on one side of the metal substrate, the metal substrate serving as a heat sink. The filter is disposed on the coupler. The conductive layer covers the coupler and is electrically connected to the filter and ground. The antenna element is disposed on the other side of the metal substrate relative to the coupler, passes through the metal substrate and is electrically connected to the coupler and the filter. A method for manufacturing the antenna device is also disclosed.

Abstract: Various examples are directed to systems and methods for controlling an autonomous vehicle. For example, a navigator system at an autonomous vehicle may generate a plurality of local routes beginning at a vehicle location and extending to a plurality of local route end points. The navigator system may access general route cost data, the general route cost data describing general route costs from the plurality of local route end points to a trip end point. The navigator system may select the first local route of the plurality of routes based at least in part on the general route cost data. A vehicle autonomy system at the autonomous vehicle may begin to control the autonomous vehicle along the first local route.

Abstract: A hybrid power-generator system includes an engine, an electric generator, first and second rectifiers, first and second DC-DC voltage converters, a DC bus, an inverter, and one or more controllers. The system provides a unique method of joining two power sources such that the relative proportion utilized can be changed to any value seamlessly, such as to avoid daily and/or seasonal variations in utility charges. Since the AC output portion of the circuit is independent of the utility grid, power can be supplied at variable frequencies to motor loads with significant positive impacts in load efficiency. Power increases required by the load(s) that occur rapidly can utilize the electrical grid to assist for the brief transient, allowing the engine, which is maintained at a fixed and wide-open-throttle position, to continue operation and in a more gradual process to resume its blend target for power generation.

Abstract: An integrated lighting and sound device includes an LED lamp sheet, a beautifying live broadcast lamp front cover, a microphone output port, a beautifying live broadcast lamp rear cover, and a sound card circuit board. The sound card circuit board is embedded in the beautifying live broadcast lamp rear cover and belongs to a part of the sound card module, and the sound card module includes a plurality of sound production modes. A sound card, a microphone, and the LED lamp sheet achieve a switch between beautifying, live talking, and live voice changing at the same time. The present disclosure saves time of switching live broadcast devices back and forth and space of working environment, increases working efficiency of a live broadcast, and reduces a purchase cost.

Abstract: Provided is a vaccine composition including a recombinant DNA vaccine against a pathogen. The recombinant DNA vaccine includes an expression cassette operably linked to a promoter, and the expression cassette encodes a non-structural protein of a Sindbis virus and an antigenic protein of the pathogen. Also provided is a method of producing a protective immune response against a pathogen in a subject in need thereof by administering the vaccine composition to the subject.

Abstract: Various embodiments of the teachings herein include a signal cable connection device comprising: a cable with a sleeve and multiple loose wires extending out from an extremity of the sleeve; a conductive metal ring crimped at the extremity so the ring and the sleeve are fixed to each other, one end of the conductive metal ring having an outward-turned flange, and a shielding wire connected to the conductive metal ring; and a housing with a cable channel defining an outer opening located at an outer side of the housing and an inner opening located at an inner side of the housing, and a threaded hole at an edge of the inner opening. When a screw is screwed into the threaded hole, the outward-turned flange of the conductive metal ring is clamped between a head of the screw and a sidewall of the inner opening.

Abstract: Embodiments of the present disclosure relate to establishing and verifying an index file. The method for establishing an index file includes: in response to receiving a data block to be stored, determining first verification information for verifying the data block and a first storage address for storing the data block. This method further includes: based on the first verification information, determining an index entry for the data block and a second storage address for storing the index entry, wherein the index entry includes the first verification information and the first storage address, and the index entry will be included in the index file. This method further includes: based on the index entry and the second storage address, determining second verification information. This method further includes: based on the second verification information and historical verification information for the index file, determining third verification information for verifying the index file.

Abstract: Herein is a probabilistic indexing technique for searching semi-structured text documents in columnar storage formats such as Parquet, using columnar input/output (I/O) avoidance, and needing minimal storage overhead. In an embodiment, a computer associates columns with text strings that occur in semi-structured documents. Text words that occur in the text strings are detected. Respectively for each text word, a bitmap, of a plurality of bitmaps, that contains a respective bit for each column is generated. Based on at least one of the bitmaps, some of the columns or some of the semi-structured documents are accessed.

Abstract: A matrix multiplier and an operation method thereof are provided. The matrix multiplier includes a plurality of first input lines, a plurality of second input lines and a computing array. The computing array includes a plurality of multiplication accumulation (MAC) cells. A first MAC cell of the plurality of MAC cells is coupled to a first corresponding input line of the plurality of first input lines and a second corresponding input line of the plurality of second input lines to receive a first input value and a second input value to perform a multiplication accumulation operation. When at least one of the first input value and the second input value is a specified value, the multiplication accumulation operation of the first MAC cell is disabled.

Abstract: The present disclosure provides a mount for a vehicle that is provided at a portion at which damping performance is desired and that is fastened by a stud bolt. The mount for the vehicle includes a flange into which the stud bolt is inserted and that supports the stud bolt, an insulator configured to surround the flange, a housing coupled to the other one of the vibrating body or the supporting body and to which the insulator is fixed, a chamber formed inside the housing as a space surrounded by the housing and the insulator, and the chamber is filled with a fluid. In addition, the mount for the vehicle includes a damping part mounted on the housing to divide the chamber into two spaces and to be disposed in the chamber. The mount for the vehicle is configured to appropriately absorb vibrations and reduce noise.