Abstract: Disclosed are a thermoelectric device and a manufacturing mold and manufacturing method thereof. The thermoelectric device includes at least one set of thermoelectric arm unit, wherein a first thermoelectric arm is provided with a first upper surface and a first lower surface opposite to the first upper surface; a second thermoelectric arm is provided with a second upper surface and a second lower surface opposite to the second upper surface; the second thermoelectric arm is seamlessly bonded with the first thermoelectric arm via an insulating adhesive layer; the first upper surface is flush with the second upper surface, and a first spacing groove is formed between adjacent positions of the first upper surface and the second upper surface; the first lower surface is flush with the second lower surface, and a second spacing groove is formed between adjacent positions of the first lower surface and the second lower surface.

Abstract: Disclosed are a solar energy-salinity gradient energy synergistic power generation system and method by using concentrating beam splitting and waste heat recovery. A concentrating beam splitting photovoltaic power generation unit includes a light mirror, a liquid splitter, a bifacial solar cell, and a waste heat collecting tube; a waste heat recovery unit includes a multi-stage phase-change heat reservoir and a heat exchanger; a salinity gradient power generation unit includes first and second chambers, an ion-selective membrane, first and second electrodes; an electricity storage and control unit includes a battery pack and an inverter; and a water supply unit includes a seawater tank and a river water tank.

Abstract: The present invention relates to the field of printed circuit heat exchangers, and in particular, to a modular square-circular composite channel printed circuit heat exchanger. The modular square-circular composite channel printed circuit heat exchanger comprises a shell, wherein the shell is divided into an inlet diverter section, a first parallel heat exchange section, a core heat exchange section, a second parallel heat exchange section, and an outlet combiner section from left to right, a plurality of square fin channels and circular micro-channels are uniformly arranged in the shell along a length direction of the shell. According to the present invention, a ratio of an average thermal resistance of a hot side to an average thermal resistance of a cold side is close to 1, which ensures the heat exchange efficiency while taking into the account structure safety and prevents the local over-temperature.

Abstract: Provided is a method and device for low-carbon integrated energy system scheduling. A specific embodiment of this method comprise: obtaining the energy device information set for each energy device in the virtual power plant; generating the acquisition cost information for each energy device based on an energy device name, energy device parameter information and an energy device number in the energy device information set; generating the energy scheduling objective values and the parameter information of each energy device based on the preset constraint sets and energy acquisition cost information of each energy device; controlling each energy device in the virtual power plant to execute the energy scheduling tasks based on the objective energy device parameter information.

Abstract: An electric vehicle thermal management system and method based on a self-circulating gas-liquid phase change cold plate are disclosed. A top cover, a first heat exchanger, a battery case partition and a battery case bottom plate are arranged in sequence from top to bottom, a top heat exchanging chamber is formed between an upper heat exchanging surface of the first heat exchanger and the top cover; the battery case partition is of a square wave-like structure, a working medium chamber is formed between a top of the battery case partition and a lower heat exchanging surface of the first heat exchanger, the working medium chamber is filled with a gas-liquid phase change working medium, and a plurality of battery chambers are formed between the bottom of the battery case partition and the battery case bottom plate.

Abstract: An experimental system a method for studying jet impact characteristics at a core outlet of a fast reactor are provided. The system includes a jet impact main loop including a water storage tank, plunger pumps, a filter, preheaters, a jet impact chamber, a heat regenerator, a condenser, valves, flow meters and pipelines connecting these facilities; a cooling loop including cooling tower, a cooling pump, a regulating valve and a flow meter; and a makeup water loop including a deionized water machine, a makeup water tank and a plunger pump. Water in the water storage tank flows to the heat regenerator via the plunger pump, is preliminarily heated by the heat regenerator and then is divided into three branches to flow to the jet impact container.

Abstract: A non-invasive time domain reflection probe calibration method includes: using different volume ratio of ethanol and deionized water mixed solution to calculate a test target's medium weight coefficient and waveguide length of the non-invasive time domain reflection probes; using different concentrations of NaCl solutions to calibrate a waveguide geometric dimensioning of the non-invasive time domain reflection probes; preparing compacted soil samples with known different moisture contents and densities, and calibrating a correlation parameter of compacted soil samples' dielectric constant and conductivity with moisture content and density. The method not only determines the sensitivity of the test target medium of the non-invasive time domain reflection probes, but also obtains the waveguide length and geometric dimensioning of the probe, and realizes an accurate test of moisture content and density of the soil.

Abstract: Disclosed is a fusion network-based method for image super-resolution and non-uniform motion deblurring. The method achieves, for the first time, restoration of a low-resolution non-uniform motion-blurred image based on a deep neural network. The network uses two branch modules to respectively extract features for image super-resolution and non-uniform motion deblurring, and achieves, by means of a feature fusion module that is trainable, adaptive fusion of outputs of the two branch modules for extracting features. Finally, an upsampling reconstruction module achieves a non-uniform motion deblurring and super-resolution task. According to the method, a self-generated set of training data is configured to perform offline training on a network, thereby achieving restoration of the low-resolution non-uniform motion-blurred image.

Abstract: The present disclosures discloses a precooler-based transcritical CO2 heat pump system and a control method of a waterway two-way valve thereof, in which a transcritical CO2 heat pump system is assisted by a precooler system. A circulating waterway is divided into two parts in the system through a three-way diversion valve and a three-way confluence valve and is connected to a waterway bypass valve through a waterway two-way regulating valve. An ambient temperature sensor, an evaporation fin temperature sensor and an evaporation pressure sensor are provided, and a programmable logic controller is used as a core for acquisition, operation and control.

Abstract: An automatic seismic facies identification method based on combination of Self-Attention mechanism and U-shape network architecture, including: obtaining and preprocessing post-stack seismic data to construct a sample training and validation dataset; building an encoder through an overlapped patch merging module with down-sampling function and a self-attention transformer module with global modeling function; building a decoder through a patch expanding module with linear upsampling function, the self-attention transformer module, and a skip connection module with multilayer feature fusion function; building a seismic facies identification model using the encoder, the decoder, and a Hypercolumn module, where the seismic facies identification model includes a Hypercolumns-U-Segformer (HUSeg); and building a hybrid loss function; iteratively training the seismic facies identification model with a training and validation set; and inputting test data into a trained identification model to obtain seismic facies co

Abstract: A screw compressor slide valve with gas pulsation attenuation function includes valve walls and internal through holes. A screw compressor includes the screw compressor slide valve. A part of exhausted gas of the screw compressor is directly discharged from an exhaust port to an exhaust chamber to form a main exhaust flow channel; another part of the exhausted gas is discharged from the exhaust port into the exhaust chamber after being delayed by the internal through holes, which forms a branched exhaust flow channel. Since the branched exhaust flow channel is longer than the main exhaust flow channel, when the gas pulsation in the branched exhaust flow channel lags behind that in the main exhaust flow channel by 180-degree in phase, two gas pulsations in the two flow channels are offset due to opposite gas pulsation phases, which attenuates the gas pulsation, thereby suppressing induced vibration and noise.

Abstract: The present invention discloses a flat heat pipe, comprising a bottom plate, a top plate, and a support plate located between the bottom plate and the top plate; a micron-level radial strip is processed on the inner surface of the bottom plate; the inner surface of the top plate is processed with superhydrophilic and superhydrophobic radial structures arranged at intervals to transport the condensate to the direction of the surrounding pipe wall; a wick is arranged on the inner side of the support plate. The present invention has the function of pumpless directional transport of liquid and convergence of refluxed condensate; thereby improving the heat exchange performance of the entire flat heat pipe.

Abstract: The present disclosure discloses a method for extracting a natural frequency difference between blades by a single blade tip timing sensor or uniformly distributed blade tip timing sensors. The method includes the following steps: acquiring actual arrival time of a rotating blade by using a single blade tip timing sensor or uniformly distributed blade tip timing sensors, and converting a difference between theoretical arrival time and the actual arrival time into displacement data of a blade tip according to a rotational speed and a blade length of the rotating blade; selecting displacement data of blade tips of two rotating blades with the same blade length at the same rotational speed; intercepting the displacement data, performing discrete Fourier transform respectively, and making a sampling frequency approximate to an average rotational speed to obtain spectrum data.

Abstract: The present disclosure relates to a narrow slit channel visualization experimental device and method under a six-degree-of-freedom motion condition. The system comprises a six-degree-of-freedom motion simulation platform, a main circulation loop, a cooling water system, an electric heating system and a bubble monitoring system, wherein the main circulation loop is composed of an S-shaped preheater, a three-surface visualization experimental section, a double-pipe condenser, a pressurizing circulating pump, a voltage stabilizer and related equipment, wherein the cooling water system is composed of the double-pipe condenser, a plate heat exchanger, a cooling tower, a cooling fan, a cooling water tank and related equipment, wherein the electric heating system is composed of a direct-current power supply, a low-voltage power controller and a transformer, and wherein the bubble monitoring system is composed of two high-speed cameras, a PIV measuring system and an electric servo module.

Abstract: The present disclosure discloses a tool wear monitoring method and system under variable operational conditions based on the decoupling of cutting force component. Spindle vibration data of a machine tool is acquired, a data set with labeled tool name information is established according to the machine internal data, a cutting force acting on the tool is estimated in real time based on a vibration signal, and the actual cutting force increased due to tool wear and the maximum allowable theoretical cutting force increased due to tool wear under the surface roughness constraint are calculated. The present disclosure enables tool wear monitoring under variable loads to determine in real time whether the excessive wear occurs based on the part accuracy constraint, and can maximize the service life of the tool.

Abstract: Computing architecture comprises an off-chip memory, an on-chip cache unit, a prefetching unit, a global scheduler, a transmitting unit, a pre-recombination network, a post-recombination network, a main computing array, a write-back cache unit, a data dependence controller and an auxiliary computing array. The architecture reads data tiles into an on-chip cache in a prefetching mode, and performs computing according to the data tiles; in the computing process of the tiles, a tile exchange network is adopted to recombine a data structure, and a data dependence module is arranged to process a data dependence relationship possibly existing between different tiles. According to the computing architecture, the data utilization rate can be increased, the data processing flexibility is improved, and therefore Cache Miss is reduced, and the memory bandwidth pressure is reduced.

Abstract: Disclosed are a high-boron high-vanadium high-speed steel and a method for preparing the same. Pig iron, scrap steel, ferrochromium, ferromanganese, ferroboron, ferrovanadium, industrial pure iron, ferromolybdenum, ferrotungsten, ferrosilicon and ferrotitanium are subjected to smelting at 1580-1600° C. and refining to obtain a liquid steel. The liquid steel is subjected to superheating, and directional solidification at a casting temperature of 1420-1430° C., and cooled to room temperature to obtain the directionally solidified high-speed steel.

Abstract: An integrated system for hydrogen purification, storage, and pressurization, including a first heat exchanger, a second heat exchanger, a third heat exchanger, a fourth heat exchanger, a hydrogen storage tank, an adjustable heat and cold source; a gas pump, a first circulation pump, a second circulation pump, a third circulation pump and a fourth circulation pump. The first heat exchanger is provided with a first low-pressure metal hydride reactor. The second heat exchanger is provided with a second low-pressure metal hydride reactor. The third heat exchanger is provided with a medium-pressure metal hydride reactor. The fourth heat exchanger is provided with a high-pressure metal hydride reactor. The first low-pressure metal hydride reactor is connected to the second low-pressure metal hydride reactor, and the medium-pressure metal hydride reactor is connected to the high-pressure metal hydride reactor. An integrated method for hydrogen purification, storage, and pressurization is also provided.

Abstract: A community question-answer (CQA) website answer sorting method and system combined with active learning. The sorting method comprises: step S1, performing question-answer data representation and modeling; and step S2, constructing a training set in combination with active learning, and predicting a sorting relationship of candidate question-answer pairs. Also provided is a community question-answer website answer sorting system combined with active learning. CQA website question-answer data is first represented and modeled, interference to answers sorting caused by long tail distribution of the community data is solved by means of a long tail factor, and an attention mechanism is introduced in a convolutional neural network to relieve a semantic gap problem among question-answer texts. Then, an unlabeled training set is also constructed, a sample is additionally selected from the unlabeled training set and labeled, and an answer sorting model is trained again after labeling results are merged.

Abstract: The present disclosure discloses a propulsion method based on liquid carbon dioxide phase change and a propulsion device. The method includes the following steps of: accommodating carbon dioxide in a thermally insulated container in a liquid phase form; transiently heating to convert the carbon dioxide from a liquid phase to a gas phase; and jetting carbon dioxide gas after the phase change in a predetermined direction by a predetermined jet-out amount so as to obtain a propulsion force.