Abstract: This application discloses a flexible circuit board which has a first area and a second area. A reference layer of the flexible circuit board is located in the first area, and the reference layer and a signal layer are stacked. A first shielding layer is located in the first area, and the first shielding layer is stacked on a side of the signal layer that faces away from the reference layer. A second shielding layer is located in the second area, and the second shielding layer and the signal layer are stacked. A first ground trace is electrically connected to the first shielding layer and the reference layer. The first ground trace is further electrically connected to the second shielding layer. A return signal in the signal layer flows from the second shielding layer to the first shielding layer and the reference layer located.

Abstract: A power semiconductor package structure, base plate, power semiconductor chip, PCB plate, package sealing layer. Upper conductive metal layer of base plate includes left metal layer and right metal layer separated by slot and electrically isolated. Sunken left mounting platform disposed on side of left metal layer close to separation slot. A sunken right mounting platform is disposed in middle part of right metal layer. Right mounting platform is configured for disposing chip, PCB plate is mounted on left and right mounting platform. A drain of chip is interconnected with right mounting platform; left metal layer is connected to source of chip through PCB plate, an extension part configured to connect to external driver circuit of power semiconductor package structure is disposed on an edge of PCB plate on a side of right metal layer, the extension part connects gate and source of chip to external driver circuit.

Abstract: A height-adjustable supporting structure used for an artificial green plant and a combined container of the height-adjustable supporting structure are provided, and relate to the technical field of artificial green plants. The height-adjustable supporting structure used for an artificial green plant and the combined container of the height-adjustable supporting structure include an artificial green plant body. The artificial green plant body includes connectors, inner rods, outer sleeves leaves. The number of the connectors, inner rods, outer sleeves leaves are multiple. The connectors, inner rods, outer sleeves leaves are combined with each other for use. The connectors are clamped with each other. A plurality of upper ends are mutually fixed with the leaves. Lower ends of the connectors are all mutually clamped with the inner rods. Outer surfaces of the inner rods are mutually fixed with the outer sleeves.

Abstract: A circuit adaptive zero-voltage switching control method based on switch transistor electroluminescence, an electroluminescence detection circuit, and an assembly structure thereof. Switching status is detected based on an electroluminescence effect, and gate switching of a device is autonomously controlled, implementing adaptive zero-voltage switching operation under both steady-state and transient-state loading conditions. Two signal receiving and amplifying assemblies are used in a differential mode in the detection circuit, to increase a signal-to-noise ratio of the electroluminescence detection circuit with an ultra-high amplification gain. A first silicon photomultiplier of a first signal receiving and amplifying assembly is close to a to-be-detected switch transistor die in a power module of an embedded printed circuit board and can sense electroluminescence in the switch transistor die.

Abstract: The present application relates to the technical field of gyroscopes, and specifically to a high-precision resonator gyroscope and a manufacturing process thereof. The manufacturing process includes obtaining a resonator substrate from fused quartz material, and further includes the steps of model design, mass trimming, assembly and packaging, and testing and compensation. A shaft system dynamic balancing and polishing process is introduced into the manufacturing process, a windowing structure is arranged on the resonator substrate, and a balancing module is configured to release balancing flow to an inner surface of the resonator substrate, so that the dynamic balance is achieved, the polishing operation on the inner surface is completed through the polishing flow, and the effects of the trimming operation is more precisely predicted and evaluated. This method not only enhances trimming accuracy, but also reduces potential performance losses caused by over-trimming or under-trimming.

Abstract: A radio/microwave frequency current probe comprising one or more resistive elements electrically connected between a current input region and a current output region, and a stack of layers each comprising a dielectric material. For each of the resistive elements, the current probe further comprises a plurality of conductive paths each separated by one or more of the layers. A first set of the conductive paths are configured to provide a current path between the current input region and the resistive element, while a second set of conductive paths are configured to provide a current path between the resistive element and the current output region. The plurality of conductive paths are arranged such that the first and second sets of conductive paths alternate in the stack of layers. The current probe may also be integrated into current measurement systems.

Abstract: A power module packaging structure based on liquid metal, including an upper printed circuit board or an upper cermet substrate, a power semiconductor chip and a lower cermet substrate, wherein a lower surface copper layer of the circuit board is connected with the chip through a soldering layer, a groove is formed in an upper copper layer of the lower cermet substrate through etching, the surface of the upper copper layer of the lower cermet substrate is subjected to silver plating, liquid metal is filled in the groove, and the chip is embedded into the liquid metal to realize electrical connection between the upper surface of the lower cermet substrate and the lower surface of the chip; an insulating sealing ring is arranged on the circuit board around the chip; and the liquid metal absorbs the lower cermet substrate and the upper printed circuit board together through surface tension.

Abstract: A computer system and method for answering a natural language question is provided. The system comprises at least one processor and a memory storing instructions which when executed by the processor configure the processor to perform the method. The method comprises receiving a natural language question, generating a SQL query based on the natural language question, generating an explanation regarding a solution to the natural language question as answered by the SQL query, and presenting the solution and the explanation.

Abstract: A terminal includes a terminal body part and an electronic accessory part. A WI-FI antenna apparatus is disposed on the terminal body part. The WI-FI antenna apparatus has a closed slot antenna. The closed slot antenna has an antenna slot that includes a main straight slot and a first slot and a second slot that are separately bent with respect to two ends of the main straight slot and extend to a same side of the main straight slot. The first slot and the second slot are perpendicular to the main straight slot, and the electronic accessory part is located on a side surface of the main straight slot.

Abstract: A slide rail assembly having a fixed slide rail with an open channel. A hook plate is mounted to the fixed slide rail. The hook plate has a locking groove. A base is attached to the fixed slide rail within the open channel. A buffer frame moves in the open channel between two positions. A toggle plate is mounted to the buffer frame. The toggle plate can rotate between a free and locked position. A locking pin extends from the toggle plate that engages the locking groove. The locking pin is free to move in the locking groove when the toggle plate is in its free position. The locking pin becomes locked in the locking groove when the toggle plate is in its locked position. A movable slide rail selectively moves within the open channel. The movable slide rail engages the toggle plate and moves the toggle plate between positions.

Abstract: A switched-capacitor coupled-inductor converter includes a converter, and near- and far-end power conversion units connected in parallel between positive and negative input interfaces. An output capacitor is arranged between the output interfaces. Each of the near- and far-end power conversion units include power switches Q1-Q3 and Q4-Q6 connected in series. The converter includes two coupled inductors having a same number of turns. An undotted terminal of one coupled inductor is connected to a dotted terminal of the other coupled inductor. A capacitor C1 is arranged between a node between Q1 and Q4 of the near-end power conversion unit and a ground terminal node of Q3 of the far-end power conversion unit. A capacitor C2 equal to the capacitor C2 is arranged at a node between a ground terminal node of Q4 of the near-end power conversion unit and Q2 of the far-end power conversion unit.

Abstract: A height-adjustable supporting structure used for an artificial green plant and a combined container of the height-adjustable supporting structure are provided, and relate to the technical field of artificial green plants. The height-adjustable supporting structure used for an artificial green plant and the combined container of the height-adjustable supporting structure include an artificial green plant body. The artificial green plant body includes connectors, inner rods, outer sleeves leaves. The number of the connectors, inner rods, outer sleeves leaves are multiple. The connectors, inner rods, outer sleeves leaves are combined with each other for use. The connectors are clamped with each other. A plurality of upper ends are mutually fixed with the leaves. Lower ends of the connectors are all mutually clamped with the inner rods. Outer surfaces of the inner rods are mutually fixed with the outer sleeves.

Abstract: A circuit adaptive zero-voltage switching control method based on switch transistor electroluminescence, an electroluminescence detection circuit, and an assembly structure thereof. Switching status is detected based on an electroluminescence effect, and gate switching of a device is autonomously controlled, implementing adaptive zero-voltage switching operation under both steady-state and transient-state loading conditions. Two signal receiving and amplifying assemblies are used in a differential mode in the detection circuit, to increase a signal-to-noise ratio of the electroluminescence detection circuit with an ultra-high amplification gain. A first silicon photomultiplier of a first signal receiving and amplifying assembly is close to a to-be-detected switch transistor die in a power module of an embedded printed circuit board and can sense electroluminescence in the switch transistor die.

Abstract: A power semiconductor integrated unit including a substrate with a recess to accommodate a power semiconductor chip, and top surfaces of a source lower-surface pad and a gate pad that are on the same side surface of the power semiconductor chip are or nearly flush with a top surface of a base plate. A flexible printed circuit board connects to the substrate and power semiconductor chip, the flexible printed circuit board has source and gate conductive traces, the source conductive trace connects to the source lower-surface pad on a top side of the chip, and the gate conductive trace connects to the gate pad on the top side of the chip. The flexible printed circuit board has an epitaxial portion, and the gate conductive trace and the source conductive trace extend onto the epitaxial portion. The integrated unit also includes a power converter circuit structure and a parallel loop structure.

Abstract: A power conversion system, including resonant capacitor, transformer, and proximal and distal power conversion units connected in parallel between positive and negative input interfaces. Proximal power conversion unit includes power switches S1-S3 connected, and the distal power conversion unit includes power switches Q1-Q3 connected. The transformer includes a primary and two secondary windings with a same number of turns. The resonant capacitor and primary winding are connected, one end is connected between S1 and S2 of the proximal unit, and the other is connected between Q1 and Q2 of the distal unit. The two secondary windings are connected, one end is connected between S2 and S3 of the proximal unit, and the other end is connected between Q2 and Q3 of the distal unit. A positive output port connection line between the two secondary windings, and a negative output port connected to a negative input port through a wire.

Abstract: A computer implemented method is described for conducting text sequence machine learning, the method comprising: receiving an input sequence x=[x1, x2, . . . , xn], to produce a feature vector for a series of hidden states hx=[h1, h2, . . . , hn], wherein the feature vector for the series of hidden states hx is generated by performing pooling over a temporal dimension of all hidden states output by the encoder machine learning data architecture; and extracting from the series of hidden states hx, a mean and a variance parameter, and to encapsulate the mean and the variance parameter as an approximate posterior data structure.

Abstract: A folding device and a heat dissipation apparatus, where the folding device includes a heat collection element, including a heat collection plate and a first shaft sleeve, where a first end of the heat collection plate is in contact with a heat source in a first folding part, and a second end of the heat collection plate is coupled to an outer wall of the first shaft sleeve, the first shaft sleeve is sleeved on a rotating shaft, and a third end of the cooling element is in contact with the rotating shaft, and a fourth end of the cooling element is in contact with a heat dissipation device in a second folding part.