Abstract: The present disclosure discloses a phase shift attenuation circuit, a phase shift attenuation network, and a radio frequency (RF) microwave system. The phase shift attenuation circuit comprises a plurality of first differential circuits electrically connected in sequence; an electrical connection between two adjacent first differential circuits of the plurality of first differential circuits including at least one of a straight-through connection or a connection through an attenuator unit; wherein the phase shift attenuation circuit realizes 8-bit step attenuation through the attenuator unit; 7-bit step attenuation among the 8-bit step attenuation is configured to realize a phase shift function, and the 8-bit step attenuation is configured to realize phase shift and attenuation functions. The phase shift attenuation circuit is constructed based on a differential circuit architecture, and is capable of simultaneously realizing the phase shift and attenuation functions by the same circuit.

Abstract: An electrical connector includes an insulating body, and a terminal assembly fixed in the insulating body. The insulating body has a covering end formed at a front end of the insulating body. The terminal assembly includes an insulating seat, a plurality of terminal slots recessed in two outer surfaces of the insulating seat, a plurality of conductive terminals received in the plurality of the terminal slots, a covering portion formed at a front end of the insulating seat, and a plurality of insertion slots. Each conductive terminal includes a contacting portion, and an insertion portion inserted in the insertion slot. An outer surface of the contacting portion is inclined forward and inward to form a chamfer. The insertion portion extends forward to form an extension portion extending out of the insertion slot. The covering end encloses the extension portions of the plurality of the conductive terminals.

Abstract: Provided is a power amplifier system based on in-phase power synthesis, including an input port; an output port; a plurality of power amplification branches, each of the plurality of power amplification branches is connected to the input port, the plurality of power amplification branches include at least one main power amplification branch and at least one auxiliary power amplification branch, each of the plurality of power amplification branches is configured to amplify an input signal of a same phase received from the input port; and an in-phase synthesizer is connected between the plurality of power amplification branches and the output port, the in-phase synthesizer is configured to perform power synthesis on the amplified signal at the same phase output from each of the plurality of power amplification branches to obtain a synthesized output signal, and transmit the synthesized output signal to the output port for output.

Abstract: The present application discloses a solar cell string and a photovoltaic module. In one aspect, a solar cell string includes a solar cell and first connecting members. The solar cell includes a substrate and first doped layers and second doped layers formed on a first surface of the substrate. A first isolation region is provided between a first doped layer and an adjacent second doped layer. First fingers are disposed on the first doped layers. Second fingers are disposed on the second doped layers. The first fingers and the second fingers extend along the first direction. Intersections of the first connecting members and the second fingers are provided with second insulating blocks in a one-to-one correspondence with the second fingers. Along the second direction, at least a part of the second insulating blocks extend into first isolation regions adjacent thereto.

Abstract: Provided is a method for designing organ-on-chips (OoCs) based on similarity principle, including determining a scaling ratio to obtain geometric dimensions of cell culture region of OoC; selecting dimensionless number as parameter calculation basis of the OoC, and calculating a range of corresponding in-vivo dimensionless number; acquiring flow rate range of fluid and size range of channels in OoC based on shear stress on cells in organ and calculated range of the dimensionless number; calculating characteristic lengths of channels according to the scaling ratio and determining corresponding flow rate; determining outer wall thickness of OoC based on oxygen permeability of material used for the OoC; performing simulation to verify whether all parameter indicators of OoC meet design requirements, and making mold sets according to outputted size design parameters for preparing the OoC; and, performing PDMS casting, curing, demolding, and bonding by using the mold sets to obtain the finished OoC.

Abstract: A spiking neural network acceleration method includes constructing an approximate computation model according to a spiking neuron model and a spiking coding mode. The approximate computation model utilizes the characteristic that spiking frequency domain coding ignores the time semantics of a spiking sequence, compresses the distribution of spiking signals on a time step, and greatly reduces a spiking routing process and a subsequent neural computation process. The time-driven accelerator replans the computation process of the spiking neural network, sets a deduplication queue and a bitmap to solve the problem of spiking jitter, and realizes efficient support on the inhibitory spiking neural network.

Abstract: A magnetic assembling panel includes an assembling panel and a frame for framing the assembling panel. The frame includes at least one magnetic element and a frame body having a receiving cavity receiving the magnetic element therein and a position limiting space formed at an inner edge of the frame body to receive an edge of the assembling panel. The frame includes a lower frame having a first mounting groove and a second mounting groove, and an upper frame having a third mounting groove and a fourth mounting groove. When the upper frame and the lower frame are coupled with each other, the first mounting groove and the third mounting groove form the receiving cavity to receive the magnetic element while the second mounting groove and the fourth mounting groove form the position limiting space to receive the edge of the assembling panel.

Abstract: A locating method and apparatus for a robot, and a computer-readable storage medium. The locating method includes: determining current possible pose information of the robot according to current ranging data collected by a ranging unit; determining, according to first current image data collected by an image collection unit, first historical image data matching with the first current image data, the first historical image data being collected by the image collection unit at a historical moment; obtaining first historical pose information of the robot at a moment when the first historical image data is collected; and in response to quantity of the current possible pose information being at least two pieces, matching the first historical pose information with each piece of the current possible pose information, and using matched current possible pose information as current target pose information.

Abstract: Disclosed a semiconductor structure includes: a substrate, including a device layer, a buried power rail, and a through silicon via, where the through silicon via is connected to the device layer through the buried power rail; a power network layer, disposed on the substrate, where the power network layer includes at least one layer of a first power array and at least one layer of a second power array, and each of the at least one layer of the first power array is connected to the buried power rail through the through silicon via; and a capacitor structure, disposed between each of the at least one layer of the first power array and each of the at least one layer of the second power array and connected to the first power array and the second power array through a lower electrode and an upper electrode of the capacitor structure respectively.

Abstract: The present disclosure discloses a preparation method of sodium-rich sodium iron sulfate composite material and its application in sodium storage. The preparation method includes carrying out low-speed ball milling of iron-based sulfate and dispersion-treated carbon nanotubes (CNTs), performing vacuum drying and heat treatment, and naturally cooling to room temperature to obtain FeSO4/CNTs; mixing FeSO4/CNTs and anhydrous Na2SO4 according to a molar ratio of Na to Fe of 7:5.5, performing low-speed wet ball milling, vacuum drying, and grinding to obtain Na2SO4/FeSO4/CNTs; compacting Na2SO4/FeSO4/CNTs, loading in a tube furnace, holding at 350-400° C. for 10-24 h, cooling to room temperature, and grinding to obtain Na7Fe5.5(SO4)9/CNTs composite material. The inventive Na7Fe5.5(SO4)9 cathode material has the advantages of good specific capacity for sodium storage, excellent rate performance, and stable long cycle life.

Abstract: The present application discloses a photovoltaic module, manufacturing methods thereof, and screen printing stencils. In one example, an photovoltaic module includes a solar cell body, a connection portion, a first bonding layer, and an electrical connector. The connection portion is arranged on a first surface of the solar cell body and includes a first connection portion and a second connection portion arranged at intervals along a first direction. The first bonding layer is arranged on a surface of the first connection portion away from the solar cell body. The first bonding layer includes at least two first bonding strips having a strip-shaped structure. The at least two first bonding strips extend along a second direction and are arranged at an interval along the first direction. The electrical connector is arranged on the first bonding layer and is electrically connected to the first connection portion through the first bonding layer.

Abstract: Methods, computer programs, and systems are disclosed, with one method including characterizing a depth variation of a predicted result within a feature of a pattern from a lithography simulation. The method evaluates the depth variation characterization and selects patterns or gauges based on the depth variation evaluation. In some embodiments, the evaluating can be based on an aerial image (AI) depth sensitivity having the depth variation.

Abstract: A power conversion system and an auxiliary power supplying method thereof are provided. The power conversion system includes AC and DC ports, an AC-DC converter, a bus capacitor, and a first auxiliary source. The AC port receives or provides an AC voltage, and the DC port provides or receives a DC voltage. The AC-DC converter has an AC terminal and a DC terminal electrically connected to the AC port and the DC port respectively. The bus capacitor is electrically connected to the DC terminal. The first auxiliary source has an input terminal electrically connected to the bus capacitor for receiving a capacitor voltage across the bus capacitor.

Abstract: The present disclosure provides a filter system including N common mode chokes, N+1 first capacitors, N+1 second capacitors and N+1 third capacitors. Each common mode choke includes a first winding, a second winding, a third winding and an auxiliary winding. In the k-th common mode choke, a second terminal of the k-th first capacitor, a second terminal of the k-th second capacitor and a second terminal of the k-th third capacitor are all electrically connected to a k-th electrical midpoint, and two terminals of the auxiliary winding of the k-th common mode choke are electrically connected to the k-th electrical midpoint and a (k+1)-th electrical midpoint respectively, N is a positive integer and k is a positive integer less than or equal to N.

Abstract: Disclosed systems and methods may include booting a first node of a multi-node cluster from an attached storage medium, e.g., a USB drive, into a bootstrap OS. The bootstrap OS may initiate PXE and file share services on the first node. Disclosed features may copy one or more software bundles for a target OS from the attached storage medium to persistent storage in the first node. The method may further include PXE booting one or more other nodes of the multi-node cluster into the bootstrap OS and connecting one or more of the other nodes to the first node via a high speed switch. One or more software bundles, including software for a targeted OS, may be copied from the persistent store to at least one of the one or more other nodes via the high speed switch.

Abstract: The present application discloses a method, system and storage medium for a communication session, involving blockchain technology. The present application sends a session request message based on a first terminal blockchain address session state, where the session request message includes a session request message identifier, a first terminal session account, and the first terminal session account includes: the first terminal blockchain address or an address mapped one-in-one to the first terminal blockchain address, and a first terminal home server connection address, the first terminal blockchain address session state is determined based on a transaction record between a visiting server blockchain address and the first terminal blockchain address; receives a session response message corresponding to the session request message identifier.

Abstract: An energy storage system includes at least one battery pack and a thermal management system. The battery pack includes a cooling plate and a battery cell. The cooling plate comes in contact with the battery cell to transfer heat energy. The thermal management system includes a control unit, a compressor, a heat exchanger, and at least one first control valve. The control unit is configured to: when a battery cell temperature of the battery pack is greater than or equal to a first temperature threshold, control the compressor to compress a thermal management medium, so that a thermal management medium flows into the heat exchanger; and control opening of the first control valve to control the thermal management medium to flow into the cooling plate in the battery pack to exchange heat with the battery cell, to decrease the battery cell temperature.

Abstract: A stator includes a stator core and a seal kit. The stator core includes a yoke part and a plurality of tooth parts. A tooth root of the tooth part is connected to the yoke part. A tooth top of the tooth part is away from the yoke part. An opening slot is formed between two adjacent tooth parts. The opening slot includes a coil slot and a flow passing slot that communicate with each other. The coil slot extends from the tooth top to the tooth root. The coil slot is configured to accommodate a stator coil. The flow passing slot extends from the tooth root to the yoke part. The seal kit is connected to an inner wall of the opening slot. The seal kit and the inner wall of the flow passing slot jointly form a flow passing passage for a coolant to flow through.