Abstract: Provided are a computer-implemented method, a system, and a computer program product. The method comprises extracting features from a plurality of base models in an ensemble model. The plurality of base models are configured to provide respective prediction results. The ensemble model is configured to provide an overall prediction result from the prediction results of the plurality of base models. The features are associated with time performance of the base models. The method further comprises clustering the plurality of base models into a plurality of clusters based on the extracted features. The method further comprises assigning the plurality of base models to a plurality of parallel computation units based on the plurality of clusters.

Abstract: This application discloses a clock synchronization method and apparatus, and related storage medium, and pertains to the field of communications technologies. A network device receives an announce message from a first master clock node and an announce message from a second master clock node; and when an identifier of a first clock source node carried in the announce message of the first master clock node is the same as an identifier of a second clock source node carried in the announce message of the second master clock node, selects a master clock node with a smaller clock deviation from the first master clock node and the second master clock node, and then calibrates a clock of the network device based on time information of the master clock node. The precision of clock synchronization by the network device is improved.

Abstract: The present application relates to an attitude self-correcting underground transportation apparatus based on UWB technology and a control method thereof. A transport clamping and fastening mechanism is mounted on an upper surface of an upper platform part of a six-degree-of-freedom motion platform. An attitude perception and sensing set at least includes three UWB tags, the UWB tags in the attitude perception and sensing set being evenly distributed on the side of the upper platform part of the six-degree-of-freedom motion platform. A control module is configured to send an electric signal to drive the six-degree-of-freedom motion platform and the transport clamping and fastening mechanism to grip an object to be transported, collect positioning information of the attitude perception and sensing set, calculate the attitude of the six-degree-of-freedom motion platform in real time, and perform attitude adjustment with reference to an expected position and attitude to maintain a smooth transportation process.

Abstract: A double-wall multi-structure quartz cylinder device, belonging to the technical field of ion beam etching. The device specifically includes a quartz cylinder outer wall, at least one quartz cylinder inner liner being provided inside the quartz cylinder outer wall, axes of the two coinciding with each other, and a quartz cylinder inner liner support being connected between the quartz cylinder inner liner and the quartz cylinder outer wall. The quartz cylinder outer wall and the bottom of the quartz cylinder inner liner are connected to a grid mesh, most of etching by-products will be sputtered onto an inner surface of the quartz cylinder inner liner through voids of the grid mesh, and less etching by-products will be attached to an inner wall of the quartz cylinder outer wall, such that the whole radio frequency circuit is less affected by contamination.

Abstract: The present disclosure discloses a lithium and tellurium-silicate binary glass-oxide-complex system and a conductive paste containing the complex system, and belongs to the technical field of solar cells. The present disclosure uses a “functional modularity” strategy in the formula design of a glass-oxide-complex system (GOC). Alkali metal ions with high migration and reactivity are separated from a glass body with high fluidity, thus a binary complex system is constructed, that is, a lithium-containing glass-oxide-complex (Li-GOC) with high activity and a tellurium-silica-containing glass-oxide-complex (Si—Te-GOC) with high fluidity. Through the modularized formula strategy, active ingredients can be better controlled, so as to obtain more balanced contact and open circuit voltage and improve the photoelectric conversion efficiency of a solar cell.

Abstract: A method and related system operations include obtaining a video stream with an image sensor of a camera device, detecting a plurality of target objects by executing a neural network model based on the video stream with a vision processor unit of the camera device. The method also includes generating a plurality of bounding boxes, determining a plurality of character sequences by, for each respective bounding box of the plurality of bounding boxes, performing a set of optical character recognition (OCR) operations to determine a respective character sequence of the plurality of character sequences. The method also includes updating a plurality of tracklets to indicate the plurality of bounding boxes and storing the plurality of tracklets in association with the plurality of character sequences in a memory of the camera device.

Abstract: A system for controlling the amount of a liquid carbon source released to a constructed wetland, includes: a carbon source pool, a carbon source pipe, a peristaltic pump, a programmable logic controller (PLC), a computer, a first flow meter, a first chemical oxygen demand (COD) sensor, a first total nitrogen (TN) sensor, a second TN sensor, a second COD sensor, an inlet pipe, and an outlet pipe. The first flow meter, the first COD sensor, and the TN sensor are disposed on the inlet pipe; the second COD sensor and the second TN sensor are disposed on the outlet pipe; the inlet pipe and the outlet pipe are connected to the constructed wetland; the carbon source pipe is connected to the carbon source pool via the peristaltic pump; the computer, the peristaltic pump, the first flow meter, and all sensors are connected to the PLC controller.

Abstract: An optical fiber interface is configured to connect to an optical fiber patch cable plug, and includes: a main body, where a plug-in port for insertion is disposed on the main body, and the plug-in port is configured to accommodate an inserted optical fiber patch cable plug; a cover plate, where the cover plate is disposed above the main body and is fixed to the main body; and a clamping unlocking mechanism, where the clamping unlocking mechanism is disposed between the plug-in port and the cover plate and includes a clamping component and an elastic component, the clamping component is disposed in a radial direction of the plug-in port and is configured to clamp the optical fiber patch cable plug when the optical fiber patch cable plug is inserted into the plug-in port. The optical fiber interface provided in embodiments of this application can be used for optical fiber connection.

Abstract: A preparation method of the microcapsules for low-temperature well cementation to be used to control cement hydration heat includes: (S1) a shell material, and added into deionized water, then the resultant mixture being stirred in a thermostat water bath so as to completely dissolve it into a homogeneous and stable shell material solution; (S2) a core material and an emulsifier being put into a three-necked flask and stirred in a thermostat water bath so as to uniformly emulsify and disperse them, forming a stable oil-in-water core material emulsion, while adjusting the pH value of the emulsion with a pH adjuster; (S3) the three-necked flask containing the core material emulsion being transferred to a water bath, and then the shell material solution being dropwise added into it with stirring, after reacting, a solid-liquid mixture being poured out so as to naturally cool it to room temperature.

Abstract: A lifting and rotating platform device includes a closed housing, a rotary shaft, a rotation driving unit, and a lifting driving unit. The closed housing includes an upper housing, a lower housing, and a middle corrugated pipe connected therebetween. The rotary shaft passes through a shaft hole at an upper end of the upper housing. A dynamic seal is between the rotary shaft and the shaft hole. An object bearing platform is at an upper end of the rotary shaft located outside the closed housing. The rotation driving unit is mounted in the upper housing; and is used to drive the rotary shaft to rotate within the shaft hole. The lifting driving unit is mounted in the lower housing; and is used to drive the rotary shaft to ascend or descend in an axial direction.

Abstract: A full-color silicon-based organic light-emitting diode (OLED) display device includes a base plate, a metal anode, an organic functional layer, a metal cathode, a thin film encapsulation (TFE) layer, and a color filter layer that are sequentially stacked from bottom to top. The metal anode includes a first indium tin oxide (ITO) anode layer and a second ITO anode layer each of which has a different thickness. The color filter layer includes a red (R) filter and a blue (B) filter, which are coated on a light-emitting region, which corresponds to the first ITO anode layer, of the TFE layer. The present disclosure overcomes the problem that the top-emission white OLED (WOLED) with a single optical thickness in the prior art is prone to color shift because the R, green (G), and B lights correspond to optical microcavities with different thicknesses.

Abstract: An unit narrow board glue application device and method suitable for high-frequency hot pressing of solid wood edge glued panel is disclosed, including a transverse chain feeding device, a longitudinal roller feeding device and a gluing device. The transverse chain feeding device includes a fixed chain transport mechanism and a movable chain transport mechanism. The longitudinal roller feeding device includes the lifting power roller assembly, the longitudinal feed roller assembly and the pneumatic compression roller assemblies. The gluing device includes a glue pump, a glue application head, and a pneumatic slide table. The front end face of the hollow structure glue application head has a number of small round holes for glue liquid discharge and horizontal glue guiding grooves. The disclosure has a high degree of automation, can give full play to the efficiency of the high-frequency hot press, and is conducive to the intelligent manufacturing of solid wood furniture.

Abstract: The present disclosure provides a data maximum/minimum value (max/min) aggregation method and system for privacy protection. A Paillier cryptosystem is used to encrypt user data, so as to protect privacy and security of user health data. Further, time aggregation is implemented to help a control center obtain an overall health condition of a client in one aggregation period. By using a homomorphic property of the Paillier cryptosystem, the present disclosure implements aggregation of a max/min of privacy protection, and helps the control center obtain a max or a min of health data of the client in the aggregation period.

Abstract: A control method for a continuously variable valve lift mechanism includes: controlling a continuously variable valve lift mechanism to enter a limp mode when the continuously variable valve lift mechanism fails and disables an automatic valve lift changing function; driving and forcing the continuously variable valve lift mechanism to move to a maximum lift position; and triggering a self locking function to self lock the continuously variable valve lift mechanism at the maximum lift position when the continuously variable valve lift mechanism reaches the maximum lift position. A control system for a continuously variable valve lift mechanism, and a vehicle are also provided.

Abstract: An optical port shielding and fastening apparatus is configured to be installed in the optical module. The optical module includes a housing assembly and an optical component located in the housing assembly. The optical port shielding and fastening apparatus includes a fastener and an electromagnetic wave absorbing piece. The fastener is fastened in the housing assembly. The electromagnetic wave absorbing piece is fastened on a side that is of the fastener and that faces an outside of the housing assembly. A first mounting hole and a second mounting hole are correspondingly provided on the fastener and the electromagnetic wave absorbing piece. The optical component passes through the first mounting hole and the second mounting hole in sequence. This application provides an optical port shielding and fastening apparatus, an optical module, and a communications device, to resolve poor optical port shielding performance of an optical module in the related technology.

Abstract: A Faraday shielding device includes an electrically conductive ring and a plurality of electrically conductive petal-shaped assemblies radially and symmetrically on the periphery of the electrically conductive ring. Each electrically conductive petal-shaped assembly includes a plurality of electrically conductive plates and connecting capacitors; the electrically conductive plate are at intervals along the radial direction; a connecting capacitor is between every two adjacent electrically conductive plates.

Abstract: Provided are a faraday cleaning device and a plasma processing system, the device comprising a reaction chamber, a bias electrode, a wafer, a chamber cover, a coupling window, an air inlet nozzle, a vertical coil, and a faraday layer, wherein the coupling window is installed at the upper end face of the chamber cover, the chamber cover is installed at the upper end face of the reaction chamber, the bias electrode is assembled inside the reaction chamber, the wafer is installed at the upper end face of the bias electrode, the air inlet nozzle is assembled inside the coupling window, the faraday layer is installed at the upper end face of the coupling window, and the vertical coil is assembled at the upper end face of the faraday layer.

Abstract: A coil structure includes a coil set including a first coil and a second coil. The first coil and the second coil are wound to form an annular area. A first end of the first coil and a first end of the second coil are close to an inner ring of the annular area. A second end of the first coil and a second end of the second coil are close to an outer ring of the annular area. The first end of the first coil is electrically connected to the first end of the second coil. A first projection-of the first coil on a plane perpendicular to an axial direction of the coil structure and a second projection of the second coil on the plane are mirror-symmetrical to each other.

Abstract: The invention relates to a low molecular weight sulfate chondroitin and a preparation method thereof. A low molecular weight chondroitin sulfate with the average molecular weight of less than 1000 Dalton can be obtained by a production process of chondroitin sulfate lyase degradation, deproteinization, filtration and sterilization and drying using macromolecular sulfate chondroitin as a raw material. The low molecular weight Chondroitin sulfate has a narrow molecular weight distribution range, the ratio of chondroitin sulfate disaccharide is 43˜60% and the ratio of chondroitin sulfate tetrasaccharide is 30˜45%, the sum of chondroitin sulfate disaccharide and chondroitin sulfate tetrasaccharide is more than 87%, the total oligosaccharide content of low molecular weight chondroitin sulfate is more than 97% and the protein content is less than 0.

Abstract: A separated gas inlet structure for blocking plasma backflow includes a gas inlet flange and an upper gas inlet nozzle and a lower gas inlet nozzle made of ceramic materials. The upper gas inlet nozzle is coaxially nested or stacked at the top of the lower gas inlet nozzle; a broken line type gas inlet channel is in the upper gas inlet nozzle and the lower gas inlet nozzle and the gas inlet channel includes an upper axial channel, a radial channel, a lower axial channel and a gas outlet; the radial channel or the lower axial channel is at a mounting matching part of the upper gas inlet nozzle and the lower gas inlet nozzle; and the top of the lower axial channel points to a bottom wall surface of the upper gas inlet nozzle.