Abstract: The present disclosure discloses a method and system for cementing simulation and gas-water back-invasion evaluation in complex formations, and relates to oil and natural gas extraction technologies. The evaluation system is provided with a simulated formation, a buffer space, a cement ring and a casing, and a movable bottom plate; two groups of hydraulic cylinders are provided below the movable bottom plate to test a shear force of a secondary interface and a compressive strength of the cement ring, respectively; the casing has a casing cavity and a cement return hole, and the cement ring is formed after cement returns and solidifies; and sonic logging probes and a gas detection device are provided within a reaction vessel. The evaluation method adopts the evaluation system described above for evaluation.

Abstract: A human-computer interaction control method for welding comprises: in response to triggering of a scheme switching control on a main menu bar, displaying a scheme switching interface on a human-computer interaction device; on the basis of a scheme uploading selection box, determining, from a scheme uploading library, a target scheme to be uploaded, and displaying an identifier of the target scheme to be uploaded in the scheme uploading selection box; when the target scheme to be uploaded has been determined and a scheme uploading control has been enabled, updating a current scheme corresponding to the current scheme selection box and displaying same as the target scheme; and on the basis of working parameters of the target scheme, controlling a battery welding process device to perform welding work on a current battery to be welded.

Abstract: A diagonalized spatial smoothing coherent DOA estimation method based on non-circular signals includes the following steps: firstly, receiving non-circular signals through a uniform linear array antenna to obtain received information; according to non-circular characteristics of the signals, concatenating the received information and the conjugate to form extended received information, and calculating the covariance matrix; then extracting subarrays from the covariance matrix diagonally, and performing augmented spatial smoothing operation on the extracted subarrays; splicing the results of smoothing operations to generate a new covariance matrix, and performing eigenvalue decomposition on the new covariance matrix to obtain a noise subspace; finally, based on the noise subspace, estimating the DOA of the non-circular signal by the reduced-dimension MUSIC algorithm.

Abstract: An electronic expansion valve, including a valve seat, a nut seat, a guide sleeve and a valve core assembly. The valve seat is provided with a first limiting structure. A first end of the nut seat is provided with a second limiting structure. The guide sleeve has a first end and a second end, which are disposed opposite to each other, an outer peripheral surface of the first end of the guide sleeve is in limiting fit with the first limiting structure, and an outer peripheral surface of the second end of the guide sleeve is in limiting fit with the second limiting structure, so as to limit a position of the guide sleeve. The valve core assembly is disposed through the guide sleeve.

Abstract: A welding method includes: acquiring a terminal post coordinate set, in a welding station coordinate system, of a plurality of terminal posts of a battery; based on the terminal post coordinate set and welding quantity information of the welding module, determining a welding coordinate set of the welding module; acquiring welding heights corresponding to welding coordinates in the welding coordinate set, the welding heights being determined based on height distances, collected by the ranging sensor, from the ranging sensor to the terminal posts corresponding to the welding coordinates; and based on the welding coordinate set and the welding heights corresponding to the welding coordinates, controlling the welding module to weld the terminal posts of the battery.

Abstract: A first graphical object in a graphical user interface is identified using an Artificial Intelligence (AI) algorithm. The graphical user interface comprises a second graphical object that was not properly identified by the AI algorithm. Source code is retrieved from a hierarchical model of the graphical user interface. A determination is made if the identified first identified graphical object and the second graphical are the same type (e.g., a button object). In response to the identified first graphical object and the second graphical object being the same type, an attribute of the identified first graphical object is compared to an attribute of the second graphical object. In response to the attribute of the identified first graphical object being the same as the attribute of the second graphical object, the second graphical object as identified as the same graphical object type as the first graphical object.

Abstract: A converter and a control method of sending a pulse width modulation (PWM) driver gating signal thereof. When an alternating current voltage output by the converter is in an O area, the converter may be controlled to switch between an upper half-bridge arm straight-through mode and a lower half-bridge arm straight-through mode. In this way, it can be ensured that there is a freewheeling path for a current in an inductive component, and a problem that a switching transistor of a secondary-side circuit is in a straight-through state is avoided.

Abstract: An inverter and a control method for sending a pulse width modulation (PWM) driver gating signal. The inverter includes a primary-side circuit, a transformer, a secondary-side circuit, and a controller. The controller is configured to: in response to a change of an absolute value of an alternating current voltage output by a filter circuit from being greater than an absolute value of a preset voltage threshold to being less than or equal to the absolute value of the preset voltage threshold, control the inverter to switch from a first working mode to a second working mode, to enable at least one and at most three of four switching transistors included in a bridge arm to be turned on.

Abstract: Embodiments of the present disclosure provide a method for determining coordinates of a terminal post, a welding method, and a welding system. The method for determining coordinates of a terminal post includes obtaining a first design drawing of a first-model battery product to be welded in a drawing coordinate system; parsing the first design drawing to obtain a first coordinate set of at least one terminal post in the first-model battery product in the drawing coordinate system; and mapping the first coordinate set to an addressing station coordinate system to obtain a second coordinate set of the at least one terminal post in the addressing station coordinate system.

Abstract: A display panel is provided. In a plan view of the display panel, the black matrix layer covers the first connection portion and the second connection portion, and the second common electrode and the pixel portion are in an area of the opening, where an angle formed between an extension direction of the first connection portion and an extension direction of the first branch electrode is greater than or equal to 120 degrees and less than 180 degrees, or the extension direction of the first connection portion coincides with the extension direction of the first branch electrode.

Abstract: Provided are a heat dissipation apparatus and an electronic device. The heat dissipation apparatus includes a heat dissipation module including at least two first liquid cooling plates arranged side by side and connected in series. Each first liquid cooling plate includes a liquid cooling channel with a liquid inlet and a liquid outlet. The liquid inlet of the first liquid cooling plate at one end is connected to a first liquid inlet pipe, and the liquid outlet or liquid inlet of the first liquid cooling plate at the other end is connected to a first liquid return pipe. For all the other liquid outlets and liquid inlets, two adjacent liquid outlets are connected through a connecting pipe, and two adjacent liquid inlets are connected through another connecting pipe.

Abstract: Provided are a fastening structure for a heat dissipator, a shielding cage assembly, and an optical module apparatus. The fastening structure includes a first fastening member and a second fastening member. Corresponding side surfaces of the first fastening member and the second fastening member are connected in a snap-fitting manner. An accommodating space for placing the heat dissipator is formed after the first fastening member and the second fastening member are buckled. Snap parts for connecting with a shielding cage in a snap-fitting manner are arranged on side surfaces of the first fastening member. Elastic pressing sheets for pressing the heat dissipator are arranged on the top surface of the first fastening member.

Abstract: The invention discloses a sweetened juice composition and a preparation method thereof. The preparation method of the sweetened juice composition in the invention includes the following steps: break fresh Momordica grosvenori fruits, take flesh and juice, conduct flash extraction with acid water, then conduct flash extraction on the flesh with pure water at room temperature, and combine water extract and acid extract into total extract; concentrate the total extract to a certain BRIX at low temperature through a composite chromatographic column, OSD membrane and two different gel columns in order, and obtain a sweetened juice composition. The juice retains the active ingredients, is nutritious, and has a rich taste, a unique candied flavor and no lingering bitterness.

Abstract: A cooling distribution unit includes a first pump, a second pump, a pump inlet pipeline, a pump outlet pipeline, a heat exchanger and a first return pipeline. The pump inlet pipeline includes a first inlet end check valve, a first pump inlet pipe, a second inlet end check valve and a second pump inlet pipe. The pump outlet pipeline includes a first outlet end check valve, a first pump outlet pipe, a second outlet end check valve and a second pump outlet pipe. The first pump outlet pipe and/or the second pump outlet pipe are connected to a first heat exchanger inlet. One end of the first return pipeline is connected to a first heat exchanger outlet, and another end is configured to be connected to an immersed liquid cooling cabinet. A cooling control cabinet having the cooling distribution unit is also disclosed.

Abstract: A temperature control circuit for a respiration tube is configured to connect to a main board, a power supply end of the main board is connected to a heating wire, and a first control module connected to the temperature control circuit for the respiration tube is disposed on the main board. The temperature control circuit for the respiration tube includes a detection module and a second control module; the detection module is connected to the second control module and configured to collect a temperature data of the heating wire and transmit the temperature data to the second control module; the second control module is connected to the first control module and the power supply end of the main board. A piece of respiration aid equipment includes the temperature control circuit.

Abstract: An electronic expansion valve, including a valve seat portion, a sealing gasket and a valve head, the valve seat portion having a valve cavity and a first flow passage, the sealing gasket being sealingly fitted with the valve seat portion, being disposed around the first flow passage and having a second flow passage, the first flow passage being in communication with the second flow passage, the valve head being movably arranged in the valve cavity, the second flow passage, when open, being in communication with the valve cavity, wherein the first flow passage and the second flow passage form a variable-diameter flow passage, with the flow areas at both ends of the variable-diameter flow passage being denoted as S1 and S2 respectively, and a minimum flow area in the middle of the variable-diameter flow passage being denoted as S3, wherein S3<S1 and S3<S2.

Abstract: A multifunctional cooking utensil includes: an inner pot removably arranged in a hollow chamber of a housing, a cover assembly configured to cover the housing and defining a cooking space together with the inner pot, a hot air assembly provided in the cover assembly and including a fan and a first heating element, a second heating element provided in a base of the housing, a first timer, and a controller. The cooking utensil can operate in a plurality of modes, and the controller is configured to receive an initial user input for initiating a combined cooking mode, having a conduction cooking mode duration T1s and a convection cooking mode duration T2s; start a conduction cooking mode and the first timer; when a time T1 recorded by the first timer is equal to T1s, switch to a convection cooking mode and start a second timer; and when a timer T2 recorded by the second timer is equal to T2s, end cooking.

Abstract: The present invention relates to a solar azimuth estimation method and system based on multi-channel feature enhancement and region-aware attention, belonging to the technical field of intelligent navigation for low-altitude economy unmanned systems. Aiming at the problem of decreased accuracy in solar azimuth estimation based on polarization images under complex cloud cover conditions, the present invention proposes a deep learning framework integrating multi-channel features and direction-aware attention. First, based on polarization light field information acquired by a division-of-focal-plane polarization camera, a three-channel composite input feature composed of a polarization intensity map, an adaptive threshold gradient map, and high-frequency residual edge information is constructed.