Abstract: Methods and systems for emulating a hardware accelerator is provided. When executed by a computer, the platform includes a plurality of computational resources provided by the computer; a hardware emulator operated on a first computational resource of the plurality of computational resources; and an accelerator being emulated in the platform and operated on a second computational resource of the plurality of computational resources, the accelerator being configured to execute an offloading operation.

Abstract: The present disclosure relates to a method for preparing a silicon nitride ceramic material. The method including: (1) with at least one of silicon powder and silicon nitride powder as original powder and Y2O3 powder and MgO powder as sintering aids, the original powder and the sintering aids are mixed in a protective atmosphere, and the mixture is formed into a green body; (2) the resulting green body is put into a reducing atmosphere and pretreated at 500° C. to 800° C. to obtain a biscuit; and the reducing atmosphere is a hydrogen/nitrogen mixed atmosphere with a hydrogen content not higher than 5%; (3) the resulting biscuit is put into a nitrogen atmosphere and subjected to low-temperature heat treatment at 1600° C. to 1800° C. and high-temperature heat treatment at 1800° C. to 2000° C. in sequence.

Abstract: Systems and methods are provided for improved point querying of a database. The index values are separated from data and retained in cache memory to allow access without requiring a disk input/output (I/O) operation and thereby having less latency resulting from such disk I/O operations. The index values can be compressed using an algorithm such as Crit-Bit-Trie to allow storage of the index values in limited cache memory space. The index values can be selected for storage according to a least recently used approach when cache memory is insufficient to store all index values to maintain a hit rate for the cached portion and reduce the disk I/O operations.

Abstract: A preparation method for a copper plate-covered silicon nitride ceramic substrate is provided. The structure of the copper plate-covered silicon nitride ceramic substrate includes a silicon nitride ceramic substrate, copper sheets disposed on the upper and lower sides of the silicon nitride ceramic substrate and soldering layers disposed between the copper sheets and the silicon nitride ceramic substrate; the composition of the silicon nitride ceramic substrate comprises a silicon nitride phase (more than or equal to 95 wt %); and a grain boundary phase (containing at least three elements (Y, Mg and O) and less than or equal to 5 wt %, and the content of a crystalline phase in the grain boundary phase is more than or equal to 40 vol %); and the sintering aids are Y2O3 and MgO. The two-step sintering process comprises: in a nitrogen atmosphere, performing low-temperature heat treatment and high-temperature heat treatment in sequence.

Abstract: The present disclosure relates to a batch sintering method for a high-property silicon nitride ceramic substrate. The batch sintering method includes: (1) silicon nitride ceramic substrate green bodies are stacked and put into a boron nitride crucible, and a layer of boron nitride powder is applied between adjacent silicon nitride ceramic substrate green bodies; (2) after step-by-step vacuumization, debinding is performed in a nitrogen atmosphere or a reducing atmosphere at 500° C. to 900° C.; (3) gas pressure sintering is then performed in a nitrogen atmosphere at 1800° C. to 2000° C., completing the batch preparation of the high-property silicon nitride ceramic substrate.

Abstract: A method and a system for predicting a gas content in transformer oil based on a joint model are provided and belong a field of transformer failure prediction. The method includes the following: determining a type and a time series of gas to be predicted related to a failure, processing an original series by adopting empirical mode decomposition (EMD) and local mean decomposition (LMD) for a non-stationarity characteristic of a dissolved gas concentration series in oil; performing normalization on each sub-series component, dividing a training sample and a test sample; and establishing a deep belief network (DBN) prediction model for each of the sub-series components for training, performing superposition and reconstruction on the established DBN prediction model to perform characteristic extraction and classification on multi-dimensional data of the failure, evaluating prediction performance of the prediction model through calculating an error index.

Abstract: The present invention relates to a crystal form I of tenvermectin B, which can be characterized by X-ray powder diffraction (XRPD) pattern, Infrared (IR) absorption spectrum, Differential scanning calorimetry (DSC) thermogram and the like. Meanwhile, the present invention also relates to a method for preparing the crystal form I of tenvermectin B and a use thereof.

Abstract: A method and a system for fault diagnosis with small samples of power equipment based on virtual and real twin spaces are disclosed, which belong to the field of fault diagnosis of power equipment. The method includes: test samples containing different locations, types and severity levels of fault of power equipment are acquired to form a real physical space; a virtual mirror space is acquired by simulation according to a simulation model of the equipment to be diagnosed; the training set in the real physical space is spatially integrated with the sample set in the virtual mirror space to obtain a training sample set in the twin spaces; the training sample set in the twin spaces serves as the supplement to the training set in the real physical space, and the fault type and fault location serve as diagnostic labels to be input to the deep neural network for training.

Abstract: A low-temperature and high-efficiency ammonia decomposition catalyst is disclosed, which includes a support and an active component. The support is SBA-15/G and the active component is nickel. The preparation method of the low-temperature and high-efficiency ammonia decomposition catalyst includes the following steps. Ni(OH)2 is mixed with SBA-15/G composite support by simple mechanical mixing method. Then, Ni/SBA-15/G supported catalyst is prepared by calcination in ammonia atmosphere. The ammonia decomposition activity of prepared materials at low-temperature is higher than that of most current Ni-based catalysts, and the method has the advantages of simple preparation process and low cost, and exhibits high catalytic activity and stability in the ammonia decomposition reaction.

Abstract: A sensing device with a sealing structure for measuring fluid characteristics by a photoelectric method is disclosed. The sensing device includes an electrode head having an outer side which contacts a fluid to be measured and one or more windows arranged in respective window openings which extend between an inner and an outer face of a wall of the electrode head. At least two sealing structures seal the one or more windows and the respective window openings. A first of the at least two sealing structures is bonded, welded, or provides an interference fit. The sensing device can be used to seal the product in high temperature, high pressure, and corrosive environment, so that the product has high air tightness and is stable and reliable for a long time. In addition, the sealing structure of the product is easy to clean.

Abstract: A test method and a multi-processor SOC chip are provided. The method includes: parsing a first command line in a host system input buffer by a host system to obtain a first command and a first parameter corresponding to the first command line, when the first command is a command of the host system in a host system command set, executing the first command by the host system, and when the first command is a command corresponding to a subsystem, sending, by the host system, the first parameter to a subsystem input buffer corresponding to the subsystem as a second command line; and parsing the second command line by a subsystem to obtain a second command and a second parameter corresponding to the second command line, and when the second command is a command in a subsystem command set of the subsystem, executing the second command by the subsystem.

Abstract: The disclosure provides a method for growing a gallium oxide single crystal by casting and a semiconductor device containing the gallium oxide single crystal. The method includes: 1) heating a solid gallium oxide to complete melting, cooling to a melting point of the gallium oxide, and maintaining a melt state for at least 30 min; and 2) conducting gradient cooling on a gallium oxide melt obtained in step 1) until a solid gallium oxide single crystal is obtained. The gradient cooling is to cool the gallium oxide melt obtained in step 1) to a first temperature according to a first gradient, and then continue cooling to a room temperature according to a second gradient to obtain the gallium oxide single crystal. In step 1), since the solid gallium oxide is heated to the first temperature, oxygen with a volume fraction of at least 2% is present in a growth atmosphere.

Abstract: Herein is a self-tuning database management system (DBMS) storing JavaScript object notation (JSON) documents and operating a JSON datatype as native to the DBMS. In an embodiment, a computer hosts a DBMS that executes a data definition language (DDL) statement that defines, in a database dictionary of the DBMS, a JSON document column of a database table that stores JSON documents as instances of the JSON datatype that is native in the DBMS. The DBMS may autonomously set or adjust configuration settings that control behaviors such as a default width of a JSON document column, in lining or not of the JSON document column, kind and scope and duration of indexing of the JSON document column, and/or caching of the JSON document column such as in an in memory columnar unit (IMCU). The DBMS may use the various configuration settings to control how JSON documents and the native JSON datatype are stored and/or processed.

Abstract: Title Thermoplastic composition based on recycled polypropylene The present invention relates to a thermoplastic composition comprising at least: (a) a recycled homopolypropylene, hPP, having a specific melt flow index and (b) from 2% to 25% by weight, with respect to the total weight of the composition, of a specific mixture of olefins. It is additionally targeted at a process for the preparation of a moulded article starting from such a composition.

Abstract: The present invention relates to a thermoplastic composition comprising at least: (a) a recycled homopolypropylene, hPP, having a melt flow index varying from 10 g per 10 minutes (10 g/10 min) to 15 g per 10 minutes (15 g/10 min), measured at 230° C. under a load of 2.16 kg according to Standard ASTM D1238, and (b) from 2% to 25% by weight, with respect to the total weight of the composition, of a specific mixture of olefins. It is additionally targeted at a process for the preparation of a moulded article starting from such a composition.

Abstract: A display substrate and a display device are provided. Sub-pixels in a display substrate are divided into sub-pixel groups, wherein the sub-pixel groups include at least two sub-pixels, and at least two sub-pixels share the same pixel driving circuit; at least two light-emitting control sub-circuit in the pixel driving circuit correspond to at least two light-emitting element included in at least two sub-pixels, at least two light-emitting control sub-circuits correspond to at least two light-emitting control signal lines, and each light-emitting control sub-circuit is coupled to an output terminal of a compensation driving sub-circuit, a corresponding light-emitting element and a corresponding light-emitting control signal line; each light-emitting control sub-circuit is configured to control turning on or off a connection between the output terminal of the compensation driving sub-circuit and the corresponding light-emitting element under the control of the corresponding light-emitting control signal line.

Abstract: A live streaming interaction method and apparatus, and a readable medium and an electronic device are provided. The method includes: in response to a selection operation of a user regarding target virtual objects in a live streaming viewing interface, displaying an object trigger operation control, the object trigger operation control being used for the user to perform a target operation to continuously trigger target virtual objects; and during the process of the user performing the target operation on the object trigger operation control, controlling a first display control to move along a first pre-set path, wherein the first display control is used for displaying, in real time, the number of target virtual objects currently triggered by the user.

Abstract: The present disclosure discloses a magnetic head, a head gimbal assembly, a hard disk drive, and a method for processing a magnetic head. The method comprises irradiating at a fixed point proximal to the read/write part with a laser irradiation device until the read head and the write head are thermally expanded; orientating air bearing surfaces of a plurality of magnetic heads forming a magnetic strip toward a lapping surface of a lapping device after laser irradiation, holding the air bearing surfaces in place, lapping with the lapping device until the air bearing surfaces are coplanar; and disassembling the magnetic strip to obtain a lapped magnetic head. Through laser heating induced compensation, the heights of lapped read head and write head of the magnetic head meet their respective target values, ensuring the normal reading and writing of the storage medium of the magnetic disk.

Abstract: A blockchain-based data processing method, device, and a computer-readable storage medium are provided. A first resource acquisition request of an object identification is transmitted for a target virtual resource to a blockchain network to make the blockchain network query a target ticket identification associated with the object identification and the target virtual resource based on the first resource acquisition request. Metadata is acquired having a binding relationship with the target ticket identification. The target ticket identification is used for characterizing that the object identification has ownership of the target virtual resource. The target virtual resource is acquired according to the metadata returned by the blockchain network. The target virtual resource is controlled to perform an interaction output in response to a triggering operation for interacting with the target virtual resource.

Abstract: Methods, systems, and devices for performing an acceleration process by offloading an operation. The system includes a hardware offloading engine that includes a hardware accelerator for performing the acceleration process. The hardware accelerator has a processor configured to receive a hardware offloading command, the hardware offloading command including an operation code, an input pointer, and an output pointer, in which at least one of the input pointer or the output pointer includes a unified data pointer that includes one or more bits of memory for identifying the source location for the input data or the destination location of the output data, parse the operation code, the input pointer, and the output pointer from the hardware offloading command, retrieve the input data based on the input pointer, and execute an offloaded operation on the input data based on the operation code.