Abstract: A circuit includes an operational amplifier and a resistor network coupled to an output of the operational amplifier. The resistor network includes a first set of resistors coupled between the output of the operational amplifier and a first node of the resistor network, wherein the resistors of the first set are electrically connected in series with each other, a second set of resistors coupled between the first node and a second node of the resistor network, wherein the resistors of the second set are electrically connected in series with each other and include a first number of resistors, a third set of resistors coupled between the second node and a third node of the resistor network, wherein the third node is coupled to a first voltage, and wherein the resistors of the third set are electrically connected in parallel with each other and include a second number of resistors, and a resistor coupled between the first node and the second node and arranged in parallel with the second set of resistors.

Abstract: Packages and methods of assembly are described in which barriers are utilized during overmolding to improve volumetric efficiency. In one embodiment, a barrier includes multiple variable height components located on an interior of the barrier, where the barrier prevents the variable height components from being overmolded during the encapsulation process. In one embodiment, a barrier includes a camera module mounted on an image sensor located on an interior of the barrier, where the barrier prevents the camera module and image sensor from being overmolded during the encapsulation process. In an embodiment, a barrier is mounted on a secondary tier with the secondary tier mounted on a primary tier, where the barrier prevents multiple connector components located on an interior of the barrier from being overmolded during the encapsulation process.

Abstract: Electronic devices and methods include a first electronic device that includes a printed circuit board and a quad plug connector coupled to a first surface of a printed circuit board. A first set of wires is coupled to a second surface of the printed circuit board, and the first set of wires are parallel to each other and are located on a first plane. A second set of wires is coupled to the second surface of the printed circuit board. The second set of wires are parallel to each other and are located on a second plane. The first and second planes are each parallel to each other and to the second surface of the printed circuit board. Moreover, the first set of wires is vertically above the second set of wires.

Abstract: This disclosure relates to collecting and analyzing data associated with a well site to predict instances of liquid loading that occurs (or that will occur) in a particular well environment. Systems herein involve training a liquid loading classification model based on historical data to predict whether or not liquid loading is occurring or will occur based on real-time sensor data that is collected by a plurality of sensors at the well site. The data is preprocessed and labeled in a manner that provides an efficient training process and which enables a machine learning model, such as a recursive neural network (RNN), to accurately predict when liquid loading will occur such that a presentation may be generated and presented to an individual with the ability to prevent or otherwise mitigate the liquid loading at a time when inefficiencies and other issues can be prevented.

Abstract: A vapor chamber includes a housing, a capillary structure, and a working fluid. Both the capillary structure and the working fluid are located in the housing. An area of a surface of the capillary structure in contact with an inner surface of the housing is less than an area of the inner surface. The housing has a cavity. The working fluid in a liquid state is located in the capillary structure. The working fluid in a gaseous state is located in the cavity. The housing includes a first region and a second region. The capillary structure includes a first part located in the first region and a second part located in the second region. The second part includes a trunk structure and a branch structure.

Abstract: A system for detecting Denial-of-Service (DoS) attacks on one or more user profiles collects a number of invalid sign-on attempts on the one or more user profiles during every time interval. The system determines a number of invalid sign-on attempts on every user profile since the start of the first time interval. The system detects a first DoS attack on a particular user profile if a first number of invalid sign-on attempts on the particular user profile exceeds a single-user profile. The system detects a second DoS attack on multiple user profiles during the first time interval if the increase in the total number of invalid sign-on attempts since the last time interval exceeds a scan-level threshold number. The system detects a third DoS attack on multiple user profiles if the total number of invalid sign-on attempts detected during combined time intervals exceeds a third threshold number.

Abstract: A downlink channel estimation method based on a co-prime array in asymmetric massive MIMO architecture is provided. First, an uplink and downlink asymmetric receiving and transmitting system model based on a co-prime array is established, and a deviation of the frequency domain direction caused by array broadband signals is observed; then, uplink receiving is performed to estimate an uplink channel, and channel parameters such as the number of paths, the angle of arrival and the path gain are recovered; and finally, a downlink channel is reconstructed based on the channel parameters recovered according to the uplink channel. By means of the high angular resolution of the co-prime array, the problem that a recovered uplink channel cannot be directly used for pre-coding of a downlink channel is solved.

Abstract: Embodiments of this application disclose a method and apparatus for training an image region segmentation model, and an image region segmentation method and apparatus. The method includes acquiring a sample image set, and each image of the sample image set having first annotation information; generating graph structure data corresponding to a sample image in the sample image set, the graph structure data comprising multiple nodes, and each node comprising at least one pixel in the sample image; determining second annotation information of each node according to the graph structure data and the first annotation information corresponding to the sample image by using a graph convolutional network model, a granularity of the second annotation information being smaller than a granularity of the first annotation information, the graph convolutional network model being a part of an image segmentation model; and training the image segmentation model according to the second annotation information.

Abstract: The embodiments of the present disclosure provide a visual positioning method, the method may include obtaining a positioning image collected by an imaging device; obtaining a three-dimensional (3D) point cloud map associated with an area where the imaging device is located; determining a target area associated with the positioning image from the 3D point cloud map based on the positioning image; and determining positioning information of the imaging device based on the positioning image and the target area.

Abstract: A motor malfunction monitoring device for monitoring a malfunction of a drive motor, includes: vibration sensors for detecting for one or more components of the drive motor transverse vibration in a direction parallel to a mounting plane of the drive motor and perpendicular to a longitudinal direction of the drive motor or longitudinal vibration in a direction perpendicular to both the mounting plane and the longitudinal direction of the drive motor; a voltage sensor for detecting a voltage of the drive motor or a current sensor for detecting a current of the drive motor; and a data storage storing a database of normal operation spectrums of one of the transverse vibration or the longitudinal vibration during a normal operation of the drive motor, and of one of the voltage or the current during a normal operation of the drive motor.

Abstract: A motor malfunction monitoring device for monitoring a malfunction of a drive motor, includes: vibration sensors for detecting for one or more components of the drive motor transverse vibration in a direction parallel to a mounting plane of the drive motor and perpendicular to a longitudinal direction of the drive motor or longitudinal vibration in a direction perpendicular to both the mounting plane and the longitudinal direction of the drive motor; a voltage sensor for detecting a voltage of the drive motor or a current sensor for detecting a current of the drive motor; and a data storage storing a database of normal operation spectrums of one of the transverse vibration or the longitudinal vibration during a normal operation of the drive motor, and of one of the voltage or the current during a normal operation of the drive motor.

Abstract: Compositions and methods for editing an endogenous NAC genes in plants are provided, for the improvement of traits of agronomic or commercial importance. Modifications of expression and activity of NAC genes are described, including editing endogenous NAC gene functional motifs and knocking out NAC gene function.

Abstract: The present invention provides a polymer molecule, a monomeric structure and a polymeric structure comprising same, a related product, a preparation method, and uses. A polymer blocking the binding to a receptor is formed by the polymerization effect of the polymer molecule, thus effectively increasing the binding capability with respect to a virus. The polymer molecule is characterized in that: multiple binding-blocking molecular units used for blocking the binding between the virus and a cell receptor are polymerized into the polymeric structure.

Abstract: A subject body index estimation method for medical imaging is presented. The method includes: obtaining image data of a subject captured by an image capture apparatus; extracting a first feature vector and key point information at a predetermined position of the body of the subject from the image data; generating a second feature vector based on the key point information; and estimating at least one of the height and the weight of the subject based on the first feature vector and the second feature vector.

Abstract: A luminescent solar concentrator (LSC) device is provided. The LSC device has an active layer including a modified luminophore having a polymethine component including a plurality of methine groups (?CH—)n, where n is an odd integer greater than 1. A hydrogen atom (H) of one of the plurality of methine groups is replaced by one of -AR1R2 or -DR3, where A is selected from nitrogen (N), phosphorus (P), arsenic (As) and antimony (Sb) and D is selected from oxygen (O), sulfur (S), selenium (Se), and tellurium (Te), R1 and R2 are independently selected from H, aliphatic groups, and aromatic groups bound to A through a carbon atom, or R1 and R2 together form an alicyclic ring containing A, and R3 is selected from H, aliphatic groups, aromatic groups, and alicyclic groups bound to D through a carbon atom.

Abstract: This application relates to a video compression and video decompression that includes: generating, based on a key frame and a forward search frame of a video, a pixel kernel of each pixel in the key frame; performing smoothness constraint processing on the pixel kernel, to obtain a target pixel kernel; compressing the key frame and the target pixel kernel, to obtain a compressed key frame and a compressed pixel kernel; compressing a residual graph between the forward search frame and a predicted frame, to obtain a compressed graph, the predicted frame being a video frame generated based on the target pixel kernel and the key frame; and obtaining a compressed video packet according to the compressed graph, the compressed key frame, and the compressed pixel kernel.

Abstract: Disclosed herein is a wellbore casing corrosion measurement tool, including a sensor assembly and control circuitry. The control circuitry is configured to energize selected components of the sensor assembly to produce multiple electromagnetic fields that are arranged about a circumference of the sensor assembly to induce eddy currents in at least one wellbore casing string, and detect magnetic fields resulting from the eddy currents in the at least one wellbore casing string via the sensor assembly, said magnetic fields being indicative of a state of the at least one wellbore casing string.

Abstract: Disclosed herein is a wellbore casing corrosion measurement tool including a sensor apparatus. The sensor apparatus has a plurality of sensor segments arranged into a segmented cylindrical shape such that a sensitivity axis of each sensor segment is aligned along a radial direction, and control circuitry. The control circuitry is configured to energize a transmitter coil of a sensor segment so that a magnetic field generated at the sensor segment extends from the sensor to induce eddy currents in at least one wellbore casing string, and detect a magnetic field generated by the eddy currents in the at least one wellbore casing string over time via receiver coils at selected ones of the sensor segments, the detected magnetic field being indicative of condition of the at least one wellbore casing string.

Abstract: An anti-breakdown ion source discharge apparatus includes a discharge chamber, a coil support, an upper insulation fixing block, a discharge component and an ion source chamber. The discharge component includes a radio-frequency coil, a lower conductive connector and an upper conductive connector. The radio-frequency coil is fixed on a coil support base; the coil support base is clamped on an inner wall of the bottom of the ion source base; the coil support is along the circumference of the coil support base; the radio-frequency coil passes through the coil support; the upper conductive connector passes by the radio-frequency coil and the coil support base from the outside of the radio-frequency coil and extends into the bottom of the discharge chamber; and the upper insulation fixing block is sleeved over the upper conductive connector and is fixed on the inner wall of the bottom of the ion source chamber.

Abstract: The present disclosure belongs to the technical field of heat exchangers, and provides a heat exchanger based on a Gyroid/Diamond (GD-type) hybrid minimal surface-based disturbance structure. The heat exchanger includes a core, headers, and flanges. The core includes a cold fluid channel and a hot fluid channel, the cold fluid channel and the hot fluid channel are separated by a parting sheet. An inlet and an outlet of the cold fluid channel are separated from an inlet and an outlet of the hot fluid channel by sealing bars. A GD-type hybrid minimal surface-based disturbance structure is inserted into the hot fluid channel. A cold fluid and a hot fluid are distributed in a cross-flow manner.