Abstract: An energy coupling method for household energy storage includes: connecting an alternate current (AC) output from an electric vehicle (EV) to a household electricity grid through an AC-to-AC power converter capable of outputting a vehicle-to-load (V2L) AC power that is synchronized to the household electricity grid; in response to an outage of an electricity grid that supplies power to the household grid, turning on the AC-to-AC power converter to supply the V2L AC power to a household load connected to the household electricity grid; and in response to a recovery of the electricity grid, turning off the AC-to-AC power converter to stop outputting the V2L AC power.

Abstract: A magnetic gradiometer can be used in systems or methods for nondestructive testing, even when the material being tested is weakly magnetic. The magnetic gradiometer can include a printed circuit board (PCB) comprising a first end and a second end separated by a base length; an excitation coil encircling at least a portion of the PCB and configured to deliver an alternating current (AC) to generate an excitation magnetic field; and a differential sensor. The differential sensor can include a reference magnetic tunneling junction in magnetic vortex state (vortex MTJ) sensor array at the first end to generate a voltage based on the excitation magnetic field; and a signal vortex MTJ sensor array at the second end to generate another voltage based on the excitation magnetic field due to a composition of the measurement target. The second end of the PCB can be oriented towards the measurement target.

Abstract: Disclosed is a cloud-native application programming interface (API) recommendation method fusing data augmentation and contrastive learning. Service information is included on the basis of a service information double-graph structure, and a mutual attention mechanism is designed to compute an importance degree of each layer of information. A data optimization method for sequence information based on functional similarity and a computation method for similarity between services based on two parts of information are provided; on this basis, data of a service invocation sequence is augmented with the idea of contrastive learning to form an augmented sequence pair; a computational contrastive loss function is combined with a pair-wise recommendation loss function to optimize an overall model, thereby improving the effect of a service recommendation model; and according to a feature embedding representation result of a service, pair-wise recommendation scores are computed to complete service recommendation.

Abstract: A high-strength and high-toughness non-heat-treatable die-casting aluminum-silicon alloy and a preparation method therefor are provided. The alloy includes the following components in percentage by weight: 8.0-10.0% of Si, 0.1-0.5% of Mg, 0.5-0.8% of Mn, 0.05-0.5% of Cu, 0.05-0.2% of Ti, 0.01-0.05% of Sr, 0.01-0.1% of V, 0.01-0.15% of RE, less than 0.2% of Fe, less than or equal to 0.4% of other impurities and the balance of Al. Based on modification refinement of eutectic Si by Sr, during preparation, the elements V and RE are imported to further significantly refine eutectic Si structures, so that the alloy obtains features of high strength and high toughness with a high Si content. Under a die-casting condition, the yield strength of the alloy can be 120-160 Mpa, the tensile strength thereof can be 260-320 Mpa and the ductility thereof can be 10-15%.

Abstract: Disclosed in the present invention is a health state assessment method for equipment based on a knowledge graph attention network, includes: steps: 1) constructing a graph data model which can comprehensively reflect change of a health state of the equipment by deeply integrating association relationships of equipment components, monitoring data dependence relationships and priori information, etc. by means of a knowledge graph and by combining with domain priori knowledge; 2) extracting feature information of the health state knowledge graph by using a graph attention network, and obtaining a target node vector representation which accurately reflects the health state of the equipment by means of learning; and 3) making a health state representation vector of the equipment pass through a fully connected layer to obtain a health state classification prediction probability, and performing training to reducing a loss value relative to a true label, thereby obtaining a health state assessment result.

Abstract: A photovoltaic inverter and a control method thereof, and a photovoltaic system. The photovoltaic inverter system includes a voltage conversion circuit, an inverter circuit, and a controller. The controller is configured to increase, based on an output power of the inverter circuit in a current time period and an output power of the inverter circuit in a first time period, an output power of the inverter circuit when the voltage conversion circuit does not work in a maximum power state. An increase of the output power of the inverter circuit is an estimated power increment value of the inverter circuit so as to stably increase an output power of the inverter while ensuring stable operation of the inverter and safe use of a power component, and improve power supply efficiency of the photovoltaic system.

Abstract: A gas-fired steam-injection boiler has a flue and a water supply pipeline. The flue is provided with a radiation section and a convection section. The water supply pipeline has, in the flue gas flow direction, a first pipe section located at an upstream portion of the convection section, a second pipe section is located at a downstream portion of the convection section, and a third pipe section arranged between the first pipe section and the second pipe section. In a water flow direction of the water supply pipeline, the second pipe section, the first pipe section and the third pipe section are arranged in sequence. By using a flue gas condenser, the temperature of flue gas can be further reduced, and the latent heat of vaporization of steam in the flue gas is absorbed to form condensate water.

Abstract: This disclosure relates generally to comparing measurements of a heart of a patient before and after one or more surgical procedures.

Abstract: A system and method for complementarily coupling and orderly converting multi-energy. The system includes: a reversible solid oxide cell, a gasification reaction chamber, synthesis reactor, and photo-thermal coupled catalytic reactor. Gasification of biomass/coal provides synthesis gas of a first source; feedstock gas is electrolyzed to produce synthesis gas of a second source; the synthesis gas of a first source and the synthesis gas of a second source react in the synthesis reactor to produce hydrocarbon fuel; during power generation, the synthesis gas enters a fuel electrode to react, and gas flowing out of the fuel electrode passes through the photo-thermal coupling catalytic reactor to react to produce hydrocarbon fuel; a heat source and light source required for gasification, electrolysis, power generation and photo-thermal coupled catalysis are provided by solar energy, and electrical energy for electrolysis is provided by power of unstable renewable energy from abandoned wind and light.

Abstract: An electric boiler device based on utilization of residual energy of an elevator includes a heat storage module, an electric heating module and a control module. A heat storage water tank of the heat storage module is replenished with water from a tap water pipe network, and a preheating unit of the heat storage module converts the residual energy of the elevator into heat energy of the heat storage water tank by using an energy consumption resistor. The control module replenishes a heating water tank with water by delivering preheated water to the electric heating module according to a water level of the heating water tank, and controls a heating unit of the electric heat module to heat the heating water tank according to a user-set temperature, and heated hot water is provided through a user water supply pipe network.

Abstract: The present application relates to a method for seamless switching between off-grid and grid-connected including: in a grid-connected state, when a host determines that utility power is abnormal, a grid-connected working mode is closed, a phase-locked source of the host is switched from the utility power to a self-oscillation state, the phase-locked source of the slave is switched to the self-oscillation state of the host, and phase-locking is performed, and an off-grid working mode is started after an input switch is turned off; in an off-grid state, when the host determines that the utility power is normal, the phase-locked source of the host is switched from the self-oscillation state to the utility power, and, the phase-locked source of the slave is switched to the utility power, and phase-locking is performed, and the grid-connected working mode is started after the input switch is turned on.

Abstract: An SNP molecular marker combination of Brassica napus L. and application method thereof are provided, and the SNP molecular marker combination includes 1407 SNP molecular markers. A set of 1407 high-quality and highly polymorphic SNP markers is screened, which are co-dominant markers, have high specificity, sensitivity and resolution, and have wide application universality. The markers are not affected by environmental conditions and can be detected by using seeds or any type of plant tissue. Detection results are accurate and have good repeatability and stability. Different data results obtained from different testing laboratories can be compared and verified with each other, and the data has universal comparability. A 1.5 K SNP chip is prepared by using the 1407 SNP markers, so as to detect genome-wide SNP of Brassica napus L. samples quickly, with high-throughput and low-cost, which can be effectively used for breeding or assisted breeding of Brassica napus L.

Abstract: A denoising method based on a multiscale distribution score for a point cloud includes: constructing a two-layer network model based on multiscale perturbation and point cloud distribution, where the two-layer network model includes a feature extraction module for extracting a feature of the point cloud and a displacement prediction module for predicting a displacement of a noise point; constructing a point cloud noise model for improving a denoising effect and retaining a sharp feature and avoiding reducing quality of point cloud data; extracting a global feature h by inputting the point cloud data into the feature extraction module; iteratively learning the displacement of the noise point by the displacement prediction module according to a feature obtained by the feature extraction unit; and defining a loss function of network training, and completing convergence under the condition that the loss function reaches a set threshold or a maximum number of iterations.

Abstract: A power fusion system, power supply device, and power supply system. The module comprises a control unit, at least one power conversion unit and a DC/AC unit; the power conversion unit is configured to convert current output by the power supply to DC; the DC/AC unit is connected with all installed power conversion units, and configured to convert DC output by one or more power conversion units into AC meeting power supply demand; the control unit can communicate with all installed power conversion units and DC/AC unit, and is configured to control operation of the power conversion unit and DC/AC unit. The power fusion system can convert current output by one or more power supply modules into AC meeting the demand, so as to supply power to the load corresponding to the demand and can supply power cooperatively to improve matching degree and adaptability of power supply.

Abstract: Disclosed herein are methods for harvesting a recombinant protein comprising an asparaginyl endopeptidase (AEP) cleavage site, as well as methods for inhibiting cleavage of a recombinant protein comprising an AEP cleavage site, during a biomanufacturing process.

Abstract: Systems and methods are provided that exploit local dynamics of a skyrmion to perform a computing function. A magnetic system hosts a skyrmion that transitions among a plurality of states, with each of the plurality of states having an associated switching probability. A bias source provides energy to the magnetic system as to adjust a switching probability associated with one of the plurality of states. A readout component measures a state of the skyrmion.

Abstract: A digital twin based method for monitoring behavior of a passenger on an escalator includes: first, constructing a digital twin virtual scene of the escalator carrying the passenger; constructing a virtual person model in a physics engine, generating various types of risky behavior in reality, and outputting different types of behavior of a virtual person; second, through a human posture recognition method for monitoring behavior of a passenger, extracting a feature map as an input by means of a visual geometry group 19 (VGG19) pre-training network, to enter part affinity fields (PAFs) and a part confidence map (PCM), so as to complete recognition of human postures; classifying the human postures with a support vector machine; and performing emergency stop control on the escalator under risky behavior of the passenger according to a result of posture classification.

Abstract: Receiving and storage of energy, and particularly a particle solar receiver for solar thermal power generation. The particle solar receiver includes: a feeding bin temporarily storing endothermic particles to be heated, and a multi-stage plate heat absorbing channel allowing the particles to flow along a predetermined path by gravity, where the multi-stage plate heat absorbing channel includes a plurality of plate-type structures which forms a changing flow direction of the particles flowing between adjacent plate-type structures. The particle solar receiver can achieve the endothermic particle heating function with a simple structure, i.e., the function of converting the solar power into thermal energy at a high-temperature level.