Abstract: A power converter includes a power converter circuit and a microcontroller that controls the power converter circuit. The microcontroller includes a power control unit and a processing unit. The power control unit adjusts the switching frequency of the power converter circuit based on thresholds of a resonant capacitor of the power converter circuit. The power control unit also generates event signals indicative of breaches of the thresholds by the resonant capacitor. When the processing unit receives an event signal from the power control unit indicative of a breach of one of the thresholds by the resonant capacitor, the processing unit determines whether the switching frequency falls outside a defined range based on the event signal. In response to determining that the switching frequency falls outside the defined range, the processing unit instructs the power control unit to clamp the switching frequency of the power converter circuit.

Abstract: In described examples, a device includes a pulse width modulation (PWM) control circuit and a burst mode logic circuit. An input of the burst mode logic circuit is coupled to an output of the PWM control circuit. The burst mode logic circuit is configured to receive a feedback signal from a secondary side of a power conversion circuit. The burst mode logic circuit is configured to suppress a sleep period of a burst mode in response to a magnitude of the feedback signal exceeding a nominal load threshold voltage. The PWM control circuit continues to operate in the burst mode while the burst mode logic circuit suppresses the sleep period.

Abstract: Novel methodology and controller for hysteresis current control in modular multilevel converters (MMCs). With this novel acceleration slope-based hysteresis current control, the MMC can behave as a high-bandwidth and high-precision current source with much reduced power loss in comparison with the two-level voltage source converter (VSC) with traditional hysteresis current control. At regular sampling intervals, a value of the outputted AC current signal is compared against a prescribed range whose upper and lower limits straddle a reference current signal to which the outputted AC current signal is to be conformed. If the measured value is above or below the range, a current/time slope of the reference current is decreased or increased, respectively, to modify a reference voltage to be imparted at the output port of the MMC to control the outputted AC current signal.

Abstract: Described are scaffolds for tissue engineering and method of making and using the scaffold. The method of making can include providing a textile layer formed of a plurality of yarns, wherein the plurality of yarns are formed of interlocking bundles of fibers formed from a first polymer or a first polymer mixture; and forming one or more substrate layer of a second polymer or a second polymer mixture onto the textile layer having a pre-defined thickness.

Abstract: Disclosed is a composition for the purification of biofluids, for example, for hemodialysis and peritoneal dialysis, comprising an osmotic agent and a toxin-removal reagent, wherein the toxin-removal reagent can remove a toxin from a biofluid under a condition for osmosis. Provided are a dialysis solution and a kit comprising the aforementioned composition, a method for removing a toxin from a biofluid using the aforementioned composition, and a method for treating a toxin-related disease.

Abstract: A thermal barrier coating for an internal combustion engine includes an insulating coating applied on engine valves and exhaust components, where a chosen material of the insulating coating comprises a material of a sodium zirconium phosphate (“NZP”) class of ceramics that has a coefficient of thermal expansion (“CTE”) greater than 5 ppm/C.

Abstract: A computing-in-memory array, chip and electronic device includes a computing-in-memory array including at least one computing-in-memory cell having a first switch, a second switch, a third switch, a fourth switch, a coupling capacitor, a first bitline, a second bitline, a third bitline, a first wordline, a second wordline and a third wordline; a control module connected to the computing-in-memory array, which controls the voltages of each wordline and bitline to read and write data through the computing-in-memory array, or to perform computing-in-memory operations. By arranging the first switch, the second switch, the third switch, and the fourth switch in a differential form, and determining the stored value by the difference of the voltage between the two ports of the second switch and the third switch, the present embodiment of the disclosure can implement computing-in-memory operations with high accuracy, low circuit complexity, high reliability, and high energy efficiency.

Abstract: A valve spring fixing device and a plunger pump are disclosed. The valve spring fixing device includes a spring fixing piece, which includes a first supporting surface and a second supporting surface located at two ends of the spring fixing piece, and an intermediate portion located between the first supporting surface and the second supporting surface; and a spring mounting portion connected with the intermediate portion and configured to mount a valve spring, the first supporting surface and the second supporting surface are configured to contact with a valve box to fix the valve spring fixing device.

Abstract: A cover, a fluid end and a plunger pump are provided. The cover includes: a body, the body being cylindrical, and the body including a first end, a second end, and a side surface connecting the first end and the second end; a main flow channel extending along an axis of the body; a plurality of subsidiary flow channels, each of the plurality of subsidiary flow channels being communicated with the main flow channel; a first opening, located at the first end and communicated with the main flow channel; and a plurality of second openings, located at the side surface of the body; each of the plurality of subsidiary flow channels being communicated with at least one of the plurality of second openings.

Abstract: A power converter includes a power converter circuit and a microcontroller that controls the power converter circuit. The microcontroller includes a power control unit and a processing unit. The power control unit adjusts the switching frequency of the power converter circuit based on thresholds of a resonant capacitor of the power converter circuit. The power control unit also generates event signals indicative of breaches of the thresholds by the resonant capacitor. When the processing unit receives an event signal from the power control unit indicative of a breach of one of the thresholds by the resonant capacitor, the processing unit determines whether the switching frequency falls outside a defined range based on the event signal. In response to determining that the switching frequency falls outside the defined range, the processing unit instructs the power control unit to clamp the switching frequency of the power converter circuit.

Abstract: Embodiments of the present disclosure provides an anti-loosening device and a plunger pump. The anti-loosening device includes a first bracket, a second bracket and an elastic member. The first bracket includes a first clamping part defining a first accommodating space; a first connecting part extending in a first direction and fixedly connected to the first clamping part; and a limiting part fixedly connected to the first clamping part via the first connecting part, wherein the limiting part protrudes from the first connecting part in a second direction perpendicular to the first direction. The second bracket includes a second clamping part defining a second accommodation space, wherein the second clamping part is opposite to the first clamping part in the first direction; and a second connecting part extending in the first direction and fixedly connected to the second clamping part.

Abstract: The present disclosure relates to a sensing-memory-computing synergy device, chip and electronic device. The said device comprises: at least one sensing-memory-computing synergy cell, wherein each sensing-memory-computing synergy cell comprises K sensing elements, where the first end of each sensing element is connected to wordline, the second end of each sensing element is connected to bitline, the sensing element can sense changes in external inputs, and K is an integer greater than or equal to zero; a control module which controls the voltages of each wordline and bitline so that the sensing-memory-computing synergy cell can perform desired operations, and sense the voltage or current on bitlines to obtain the operation results. The present embodiment of the disclosure implements the sensing-memory-computing synergy cell by sensing elements, which combines sensing and in-memory computing.

Abstract: A plunger, a hydraulic end and a plunger pump are disclosed. The plunger includes a plunger body, the plunger body includes a flow channel; a first liquid inlet hole is located in the plunger body and passes through the sidewall of the plunger body; the plunger body includes a first end portion and a second end portion, a flow channel extends from the first end portion to the second end portion, a part of the flow channel close to the first end portion is closed, the flow channel extends to the second end portion and forms a first opening, the first liquid inlet hole is communicated with the flow channel, the first valve assembly is located at the first opening, and is configured to allow fluid to flow out from the flow channel at the first opening and prevent fluid from flowing back to the flow channel from outside.

Abstract: A puller includes a first claw and a second claw arranged opposite to each other. The first claw includes a first pulling part, a first limiting part and a first connecting part. The first limiting part includes a first body part, a first notch part and a second notch part. The second claw includes a second pulling part, a second limiting part and a second connecting part. The second limiting part includes a second body part, a third notch part and a fourth notch part. A size of the second pulling part is smaller than or equal to a size of the second notch part.

Abstract: The present specification discloses video matching. In a computer-implemented method, a plurality of feature vectors of a target video is obtained. A candidate video similar to the target video is retrieved from a video database based on the plurality of feature vectors of the target video. A time domain similarity matrix feature map is constructed between the target video and the candidate video based on the target video and the candidate video. Using the time domain similarity matrix feature map as an input into a deep learning detection model, a video segment matching the target video in the candidate video and a corresponding similarity is output.

Abstract: A thermal barrier coating for an internal combustion engine includes an insulating thermal spray coating, where a chosen material of the insulating thermal spray coating has a thermal conductivity lower than 2 W/mK in fully dense form and the chosen material includes a coefficient of thermal expansion within 5 ppm/K of a coefficient of thermal expansion of a material of a component of the internal combustion engine upon which the coating is placed.

Abstract: A coating on a substrate is disclosed having layers including yttrium aluminum garnet (YAG) and yttrium aluminum monoclinic (YAM).

Abstract: A system comprises a first comparator, a second comparator, a pulse-width modulation (PWM) controller, and a ramp generator. The first comparator has a positive input coupled to a first ramp output of the ramp generator and a negative input configured to receive an input voltage. The second comparator has a positive input configured to receive the input voltage and a negative input coupled to a second ramp output of the ramp generator. The PWM controller is coupled to outputs and control signal inputs of the first and second comparators and has a control output. In some implementations, the ramp generator generates a high-side falling ramp for the first comparator and a low-side rising ramp for the second comparator. In some implementations, the ramp generator includes a first ramp generator for the high-side falling ramp and a second ramp for the low-side rising ramp.

Abstract: The application provides a method and device for adjusting a permanent magnet motor, an equipment, and a storage medium. The method includes the following operations. An electronic equipment acquires a counter electromotive force (CEMF) parameter, information of an electromagnetic structure of a permanent magnet motor to be adjusted and a minimum impedance value of any short-circuited coil of the permanent magnet motor to be adjusted, to determine an operational time of the short-circuited coil. The electronic equipment further judges, according to the operational time of the short-circuited coil, whether an adjustment instruction is required to be transmitted to a production equipment. When the operational time is inconsistent with a preset time, the electronic equipment transmits the adjustment instruction to the production equipment. The production equipment adjusts, according to the adjustment instruction, the electromagnetic structure of the permanent magnet motor to be adjusted.

Abstract: The present invention discloses a lithium organic acid-amino acid salt. A lithium organic acid is one or more of lithium isobutyrate, lithium n-butyrate, lithium lactate, lithium citrate or lithium cholesterol; an amino acid is one of L-proline, valine, lysine or artificially synthetic amino acids; and the lithium organic acid-amino acid salt is a salt formed by the lithium organic acid and the amino acid. The present invention further discloses a crystal form, a preparation method and an application of the salt. The lithium organic acid-amino acid salt of the present invention has a positive curative effect and a preventive effect on recurrent episodes of mania and depression in bipolar disorder, and can delay degenerative changes of the central nervous system to realize better distribution in the central nervous system.