Abstract: The present discloses a gas-gas high-temperature heat exchanger, including a shell (12), a tube sheet (5), a low-temperature gas inlet pipeline (6) and an outlet pipeline (7), and a high temperature gas outlet (8), the tube is divided into a first heat transfer zone (1) and a second heat transfer zone (2), a low temperature gas (4) flows in the tube, the tube includes a insert component (9) and an outer fin (10); a heat transfer tube in the second heat transfer zone (2) has a sleeve structure, a high-temperature gas (3) flows in the core tube (13), the low temperature gas (4) flows in an annular region between the core tube (13) and an outer tube (14), the high-temperature gas (3) flows out of the core tube (13) and flows into the shell-side area of the second heat transfer zone (2) again.

Abstract: Provided is a gas switch triggered by an optical pulse introduced by an optical fiber, which solves the problem of the existing electrically-triggered gas switch and laser-triggered gas having a complicated trigger system, being insufficiently reliable and having a higher cost due to the pulse amplitude/laser beam energy having higher requirements. The gas switch triggered by an optical pulse introduced by an optical fiber includes at least one trigger gap and one self-breakdown gap; each trigger gap is connected in parallel to a photoconductive switch, and an optical fiber is correspondingly provided for introducing an optical pulse for triggering.

Abstract: A system for preparing subcooled liquid oxygen based on mixing of liquid oxygen and liquid nitrogen and then vacuum-pumping, including atmospheric-pressure saturated liquid nitrogen and oxygen tanks. An inlet of the liquid nitrogen tank communicates with pressurized gas, and an outlet is connected to an inlet a of a secondary subcooler. An inlet of the liquid oxygen tank communicates with the pressurized gas, and a first outlet is connected to an inlet b of the secondary subcooler. An outlet c of the secondary subcooler is connected to an inlet d of a primary subcooler. An outlet e of the primary subcooler is connected to a pumping-out device through a rewarming device. A second outlet of the liquid oxygen tank is connected to an inlet n of the primary subcooler. An outlet o of the primary subcooler is connected to an inlet r of the secondary subcooler.

Abstract: A control method of a transcritical carbon dioxide composite heat pump system is disclosed, wherein the transcritical carbon dioxide composite heat pump system includes: a CO2 main circuit compressor, an air-cooling-air-cooling recombiner, a supercooling-evaporation recombiner, an evaporator and a CO2 auxiliary compressor; wherein the air-cooling-air-cooling recombiner comprises a CO2 main circuit, a CO2 auxiliary circuit and a water circuit; the supercooling-evaporation recombiner comprises a CO2 main circuit supercooling section and a CO2 auxiliary circuit evaporation section. The present invention includes two working modes according to the return water temperature, so that the unit has a wider application range and meets daily needs. There is only one heat exchanger for refrigerant and water. Compared with the three water and refrigerant heat exchangers in the conventional transcritical CO2 composite heat pump, the circulating water circuit is a single circuit with one inlet and one outlet.

Abstract: A model-driven deep learning-based seismic super-resolution inversion method includes the following steps: 1) mapping each iteration of a model-driven alternating direction method of multipliers (ADMM) into each layer of a deep network, and learning proximal operators by using a data-driven method to complete the construction of a deep network ADMM-SRINet; 2) obtaining label data used to train the deep network ADMM-SRINet; 3) training the deep network ADMM-SRINet by using the obtained label data; and 4) inverting test data by using the deep network ADMM-SRINet trained at step 3). The method combines the advantages of a model-driven optimization method and a data-driven deep learning method, and therefore the network has the interpretability; and meanwhile, due to the addition of physical knowledge, the iterative deep learning method lowers requirements for a training set, and therefore an inversion result is more reliable.

Abstract: Disclosed herein is a method of stripping a strong reflection layer based on deep learning. The method establishes a direct mapping relationship between a strong reflection signal and seismic data of a target work area through a nonlinear mapping function of the deep neural network, and strips a strong reflection layer after the strong layer is accurately predicted. A mapping relationship between the seismic data containing the strong reflection layer and an event of the strong reflection layer is directedly found through training parameters. In addition, this method does not require an empirical parameter adjustment, and only needs to prepare a training sample that meets the actual conditions of the target work area according to the described rules.

Abstract: The disclosure discloses a liquid arc voltage transfer based direct current breaker and a use method thereof. The direct current breaker includes a first connection terminal, a second connection terminal, a main current branch, a transfer branch and an energy dissipation branch. The main current branch is connected between the first connection terminal and the second connection terminal, and the main current branch includes a liquid break. The transfer branch is connected between the first connection terminal and the second connection terminal and is connected in parallel with the main current branch. The energy dissipation branch is connected between the first connection terminal and the second connection terminal and is connected in parallel with the main current branch and the transfer branch.

Abstract: A solar aided coal-fired power generation system participating in primary frequency regulation and a control method thereof propose a system configuration with two regulation schemes by coupling medium-low-temperature solar collectors and a coal-fired generation unit. The two regulation schemes are a high-pressure feedwater bypass scheme and a low-pressure condensate bypass scheme. The present invention formulates a primary frequency regulation control logic, so as to efficiently and accurately participate in the primary frequency regulation, thereby keeping the power grid frequency rapidly stable. The present invention also formulates a working fluid outlet temperature control logic for the solar aided coal-fired thermal system, which adjusts a heat exchange working fluid flow of the solar collectors to ensure that the temperature in each section is stable during the primary frequency regulation.

Abstract: A model-driven deep learning-based seismic super-resolution inversion method includes the following steps: 1) mapping each iteration of a model-driven alternating direction method of multipliers (ADMM) into each layer of a deep network, and learning proximal operators by using a data-driven method to complete the construction of a deep network ADMM-SRINet; 2) obtaining label data used to train the deep network ADMM-SRINet; 3) training the deep network ADMM-SRINet by using the obtained label data; and 4) inverting test data by using the deep network ADMM-SRINet trained at step 3). The method combines the advantages of a model-driven optimization method and a data-driven deep learning method, and therefore the network has the interpretability; and meanwhile, due to the addition of physical knowledge, the iterative deep learning method lowers requirements for a training set, and therefore an inversion result is more reliable.

Abstract: A joint control method with variable ZVS angles for dynamic efficiency optimization in a WPC system for EVs under ZVS conditions, including: adjusting a phase-shift duty cycle of a secondary active rectifier to control a charging voltage and a charging current of EV's batteries through a charging voltage closed loop and a charging current closed loop, respectively; adjusting a power angle of the secondary active rectifier to control a ZVS angle of the secondary active rectifier through a secondary ZVS angle closed loop; adjusting a phase-shift duty cycle of a primary inverter to control a ZVS angle of the primary inverter through the primary ZVS angle closed loop; determining the current operating case of the WPC system and adjusting the ZVS angles of the primary inverter and the secondary active rectifier to automatically identify an optimal operating point with a maximum charging efficiency through the P&O method.

Abstract: A method for controlling a coal supply quantity during a transient load-varying process considering exergy storage correction of a boiler system of a coal-fired unit is provided. Temperatures and pressures of working fluid and metal heating surface of the boiler system of the coal-fired unit are measured and recorded in real-time, and converted into the exergy storage amount at different operating load points. During the transient operation process, the real-time exergy storage amount of the boiler system is compared with the exergy storage amount at the corresponding steady-state load point, and the real-time exergy storage variation is obtained; thereafter, the feed-forward control signal of coal supply quantity input is superposed to the existing coal supply quantity command of the boiler system, and the coal supply quantity signal of the boiler system based on the exergy storage correction is finally generated.

Abstract: A direct ink writing device and method for a bias-controllable continuous fiber reinforced composite material are provided. The device includes a cartridge fixed by an external device, a bottom of the cartridge is connected to a nozzle. A piston is arranged in the cartridge, the piston is provided with a chamber for containing sealing liquid and a capillary for a continuous fiber to pass through. The centers of an inner circumference and an outer circumference of the cartridge do not coincide with each other. The bias position of the continuous fiber in the composite material is achieved using the piston, and each filament of composite material is printed in steps of rotation, extrusion, revolution and curing. A structure produced according to the disclosure has high mechanical properties and outstanding intelligent properties, and the bias position of the continuous fiber material in the structure can be accurately adjusted.

Abstract: A thin-film thermocouple probe includes a columnar substrate, a tungsten-26% rhenium film and an indium oxide (In2O3) film. A side surface of the columnar substrate is provided with a first straight groove and a second straight groove. The tungsten-26% rhenium film is arranged on a front end surface of the columnar substrate and in the first straight groove. The indium oxide film is arranged on the front end surface of the columnar substrate and in the second straight groove. The indium oxide film on the front end surface of the columnar substrate is connected to the tungsten-26% rhenium film on the front end surface of the columnar substrate. A first metal lead wire is connected to the tungsten-26% rhenium film, and a second metal lead wire is connected to the indium oxide film. A method of preparing the thin-film thermocouple probe is provided.

Abstract: In a solar water taking and power generating device, a concentrating-cooling plate encloses the opening, and at least one freshwater collecting channel is formed between the seawater tank and the concentrating-cooling plate; a cation exchange membrane includes a semiconductor film body, nanoparticles, and a capillary water-transporting conduit, wherein the semiconductor film body is provided with cation-selective channels; sunlight illuminates the cation exchange membrane and the nanoparticles through the concentrating-cooling plate, so that the first temperature, the first seawater concentration and the first electric potential in the first side are higher than those in the second side, respectively. The evaporated seawater enters the freshwater tank after condensed, and the cations transfer from the first side to the second side to form an ionic current.

Abstract: The present invention relates to a three-dimensional integrated package device for a high-voltage silicon carbide power module, comprising a source substrate, first chip submodules, a first driving terminal, a first driving substrate, a ceramic housing, a metal substrate, a water inlet, a water outlet, second chip submodules, a second driving terminal, a second driving substrate and a drain substrate from top to bottom; and each first chip submodule is composed of a driving connection substrate, a power source metal block, a first driving gate metal post, second driving gate metal posts, a silicon carbide bare chip, an insulation structure and the like. A three-dimensional integrated half-bridge structure is adopted to greatly reduce corresponding parasitic parameters.

Abstract: There is provided a direct current breaker based on vacuum magnetic blowout transfer and a breaking method thereof. The direct current breaker includes a first connection terminal, a second connection terminal, a main current branch, a transfer branch, an energy dissipation branch and a blowout unit. The main current branch is connected between the first connection terminal and the second connection terminal. During current conduction of the direct current breaker, current flows through the main current branch. The transfer branch is connected between the first connection terminal and the second connection terminal and connected in parallel with the main current branch. The energy dissipation branch is connected between the first connection terminal and the second connection terminal and connected in parallel with the main current branch and the transfer branch. The blowout unit is arranged between the main current branch and the transfer branch.

Abstract: An optimized control method for a primary frequency regulation based on art exergy storage correction of a thermodynamic system of a coal-fired unit is provided. Through measuring and recording temperatures and pressures of working fluids and metal heating surfaces of the coal-fired unit thermodynamic system in real-time, an exergy storage amount of the thermodynamic system is obtained. During a transient process, according to an exergy storage variation before and after acting of each regulation scheme, a maximum power output of each scheme is obtained. Thereafter, through comparing the maximum power output with a power regulation quantity required by a power grid, an optimal primary frequency regulation control scheme is selected, so as to maintain a fast and stable grid frequency. The present invention reduces a selection blindness of the primary frequency regulation schemes, so that an operation flexibility of the coal-fired power unit during the transient processes is greatly improved.

Abstract: The present disclosure relates to a ToF depth sensor based on laser speckle projection. The ToF depth sensor includes a laser projector, which is used for projecting periodic infrared laser signals with phase information to the detected space; a diffraction optical element (DOE), which is used for uniformly distributing a beam of incident infrared laser signals into L beams of emergent infrared laser signals, enabling each beam of the emergent infrared laser signals to carry respective phase information, as well as the beam diameter, divergence angle and wavefront of the emergent infrared laser signals to be identical with those of the incident infrared laser signals, while only changing the transmission direction and controlling coded patterns projected out by laser speckles; and an image sensor, which is used for calculating depth information of a measured object by matching the laser speckles with pixel points of the image sensor.

Abstract: A deep partial transfer method weighted by a domain asymmetry factor for rolling bearing fault diagnosis includes: first, extracting the deep transfer fault features from the monitoring data of the source rolling bearing and the target rolling bearing by a deep residual network; second, training the domain confusion network by using the deep transfer fault feature, and calculating the domain asymmetric factor; next, calculating the maximum mean discrepancy implanted by a multiple polynomial kernels of the fault features of the adaptation layer of the deep residual network, and using the domain asymmetry factor weighting to suppress the contribution of outlier fault features of the source rolling bearing; and finally, building the objective function using the weighted maximum mean discrepancy implanted by the multiple polynomial kernels to train the deep residual network.

Abstract: The present disclosure presents a heat exchange plate with slotted airfoil fins for a printed circuit heat exchanger. In the present disclosure, a herringbone streamlined slot is arranged on a fin so that a part of the heat exchange fluid can flow through a channel of the slot and flow out from the tail of the fin. In such a way, the perpendicular hitting on the fin can be prevented, thereby prevent forming of the stagnation area, mitigating phenomenon of substantial flow resistance in this area and, in turn, reducing the pressure drop of channel. Meanwhile, the slotted area could substantially increase the heat exchanging area and thus improve the heat exchanging performance.