Abstract: A cyber-physical integrated restoration method and system for distribution systems based on emergency mobile communications are provided. After extreme natural disasters which cause serious damage to distribution systems, damages of distribution systems are evaluated through system feedback data. When ground communication base stations are unavailable due to the damages, the method can make full use of existing wireless emergency communication resources to provide emergency communication services, and quickly restore the power supply through distribution automation functions with supports of the backup battery of automatic terminal devices, so as to effectively improve the resilience of distribution systems.

Abstract: An alginate hydrogel-based thin-film heat flux sensor for billet crystallizer includes an alginate hydrogel substrate. The alginate hydrogel substrate is configured in a U-shaped planar structure. The U-shaped planar structure includes a first side and a second side, and the first side is longer than the second side. An inner surface of the alginate hydrogel substrate is provided with a first film thermocouple and a second film thermocouple. The first film thermocouple is in crosslinking connection with the second film thermocouple.

Abstract: The present disclosure provides a data processing method, a device, a computer apparatus and a storage medium, wherein the method includes: in response to a target disk receiving at least one write request within a preset time period, determining a size threshold value for classifying a data update type according to a size of write data respectively indicated by each write request; determining a data update type corresponding to each write request according to a size of each write request and the size threshold value; dividing write data of the write request to obtain a data block according to a preset data block size, and caching the data block in a cache region of the target disk corresponding to the data update type, the target disk has multiple types of cache regions configured therein, different cache regions are configured to support caching of data with different update frequencies.

Abstract: A plasma-activated gas disinfection device includes a plasma generating unit, a disinfection chamber, an air pump and a fluid control module, where the plasma generating unit works in a first working mode during a first time period, and generates a first plasma active gas in the first working mode; the plasma generating unit works in a second working mode during a second time period, and generates a second plasma active gas in the second working mode; and the first time period is before the second time period, and alternatively, the first time period is after the second time period, such that a disinfection object in the disinfection chamber is disinfected. The plasma generating unit in the present disclosure is a simple device, and only one discharge module is used for generating different plasma active gases.

Abstract: A method of preparing biodegradable Zn—Mg—Bi zinc alloy includes: melting magnesium under an inert atmosphere to obtain a magnesium melt; adding bismuth particles to the magnesium melt followed by reaction under stirring and heat preservation treatment to obtain a Mg—Bi alloy melt; allowing the Mg—Bi alloy melt to stand in a furnace; subjecting the Mg—Bi alloy melt to refining, slagging-off, casting and demoulding to obtain Mg-50 wt. % Bi alloy ingot; melting zinc to obtain a zinc melt; adding the Mg-50 wt. % Bi alloy ingot and pure magnesium or pure bismuth followed by heating to a preset temperature, stirring and heat preservation to obtain a Zn—Mg—Bi alloy melt; allowing the Zn—Mg—Bi alloy melt to stand in a furnace followed by refining, slagging-off, casting and demoulding to obtain the biodegradable Zn—Mg—Bi zinc alloy.

Abstract: The present disclosure provides a data processing method, a device, a computer apparatus and a storage medium, wherein the method includes: in response to a target disk receiving at least one write request within a preset time period, determining a size threshold value for classifying a data update type according to a size of write data respectively indicated by each write request; determining a data update type corresponding to each write request according to a size of each write request and the size threshold value; dividing write data of the write request to obtain a data block according to a preset data block size, and caching the data block in a cache region of the target disk corresponding to the data update type, the target disk has multiple types of cache regions configured therein, different cache regions are configured to support caching of data with different update frequencies.

Abstract: A method for evaluating the mechanical state of a high-voltage shunt reactor based on vibration characteristics is disclosed, relating to the technical field of electrical equipment fault diagnosis. The method includes: based on historical state data and real-time vibration and noise signal data of the high-voltage shunt reactor and through an LSTM neural network time series prediction method, comparing deviation between predicted characteristic value and actual characteristic value, and determining whether the high-voltage shunt reactor has mechanical defects or failures. By using the historical state data and the real-time vibration and noise signal data of the high-voltage shunt reactor, an LSTM neural network time series prediction method, as well as comparison of the deviation between the predicted characteristic value and the actual characteristic value, etc., the evaluation of the mechanical state of the high-voltage shunt reactor is realized.

Abstract: The present disclosure relates to the field of strain sensors, and specifically relates to a high-temperature thin-film strain sensor, including a substrate and a strain-sensitive grid. The strain-sensitive grid includes an indium tin oxide layer and a platinum layer, the indium tin oxide layer is deposited on the substrate, and the platinum layer is deposited on the indium tin oxide layer. The indium tin oxide layer contains 50% by mass of indium oxide and 50% by mass of tin oxide. The high-temperature thin-film strain sensor provided by the present disclosure can be used in an environment from room temperature to 500° C., and have extremely high sensitivity at a high temperature of 500° C. Unlike the conventional metal foil strain gauge with a thickness of several microns, the high-temperature thin-film strain grid has a thickness of 500 nm, which can better convey the strain of the measured object at high temperature.

Abstract: A power-assisted negative pressure type flexible exoskeleton system used for an extravehicular spacesuit. The system includes an exoskeleton pneumatic control system, a plurality of inertial sensors, a plurality of negative pressure type flexible actuators and a plurality of flexible bending sensors, wherein pneumatic energy is provided for the exoskeleton system by a gas source in the exoskeleton control system, compressed air is cleaned by a water-separating gas filter, normal work of a pneumatic actuating element is guaranteed, a pressure reducing valve and a pressure gauge carry out voltage stability control on the output pressure of the gas source, a two-position two-way valve serves as a gas source switch valve, and three-position three-way valves, proportional pressure valves and the flexible actuators form four pneumatic control loops of the left and right elbow joints and the left and right knee joints of the exoskeleton system.

Abstract: A gas-fired steam boiler, including multiple heat exchange tubes, an upper steam header, a lower steam header, a casing, a burner, a condenser, a chimney, and a controller. The heat exchange tubes are vertically arranged to form an annular tube row. A space enclosed by the annular tube row is configured as a furnace. Adjacent two heat exchange tubes are combined to form a gap channel evenly distributed along a circumferential direction. A width of the gap channel is 0.1-4 mm, and a circumferential length of the gap channel is 50-300 mm. A length of the gap channel along an axial direction of the heat exchange tube is the same as a length of the heat exchange tube.

Abstract: The present disclosure provides a wireless sensor, a manufacturing method thereof and a wound flatness detection system. The wireless sensor includes a sensing element, two elastomer-made encapsulation layers and a breathable fiber-made encapsulation layer; wherein the sensing element is manufactured by the following steps: step 1: preparing a thin film using a carbon-based polymer solution; step 2: using a low-energy laser to induce molecular reconstruction of carbon-based groups on surfaces of the thin film to form a resistance-sensitive layer; step 3: using a high-energy laser to modify, carbonize and cut the resistance-sensitive layer to form a patterned sensing element. The present disclosure solves the problems that existing pressure or tension sensors are extremely susceptible to static interference from the external environment and the human body, and the mechanical mismatch between the sensing layer and the substrate, as well as the impermeability problem.

Abstract: A method for analyzing debris bed formation based on a multi-resolution multiphase particle algorithm, which uses the least-squares moving particle semi-implicit method with second-order computational accuracy and improves surface tension model and free surface particle identification model. The method also utilizes a particle-based gas-liquid phase transition model and a particle-based liquid-solid phase transition model with multi-resolution features, such that the coolant vaporization and melt solidification processes during the falling process of the melt can be calculated. Moreover, a solid-solid collision model is coupled to calculate the collision and debris bed deformation during the falling process of the debris particles. In this way, the momentum exchange, energy transfer and phase transition between different phases are taken into account, and the computational instability caused by the large physical difference between phases is mitigated.

Abstract: A customized method for strengthening the water droplet erosion (WDE) resistance on steam turbine blade surfaces having the following steps: step S1: carrying out numerical analysis about erosion characteristics on blade surfaces to predict water erosion prone areas; Step S2: designing corresponding structures against WDE, and conducting a test for WDE characteristics of structures to screen effective structures; Step S3: according to the areas detected in Step S1, selecting a suitable and effective structure from the test and determining where and how to arrange the structure on the blade surface is disclosed. The above-mentioned method can detect areas prone to blade erosion by numerical simulation, and arrange the structures screened out by test of WDE characteristics to improve the WDE resistance of blades, mitigating the WDE problem so only a small number of special structures in local areas are arranged, thereby minimizing cost and influence on steam turbine blades.

Abstract: Disclosed is a counter-roller active power flexible spinning device for a large cylinder, including a rack unit, a spindle unit, an outer roller unit, and an inner roller unit. A spindle turntable of the spindle unit is used to fix a cylinder blank. A second driver drives the spindle turntable to rotate, thereby achieving the rotation of a cylinder blank. A first driver drives the spindle turntable to be axially fed along a cylinder through a spindle platform. A third driver of the outer roller unit can drive an outer roller to rotate, and a fourth driver drives an outer roller seat to be radially fed along the cylinder at the top of an outer pillar. A fifth driver of the inner roller unit can drive an inner roller to rotate, and a sixth driver drives an inner roller seat to be radially fed along an inner roller disk.

Abstract: The present disclosure provides a method for pre-separating nuclides in spent fuel, comprising steps: S1. generating a temperature of 1200 to 1600° C. in a center of a fuel element, and at the same time introducing a cooling medium to an outer surface of the fuel element, to introduce a temperature difference to heat the fuel element; S2. soaking cooled spent fuel in an ionic liquid to selectively dissolve fission products and transuranic elements, so that the fission products and the transuranic elements are pre-separated from the spent fuel. The method achieves the effect of pre-separating part of the fission products and transuranic elements by physical methods, and solves the problem that homogenization in traditional post-processing technology causes obstacles to nuclide separation.

Abstract: Disclosed is a lightweight two-crossbeam high-speed free forging hydraulic press. The hydraulic press includes a fixed crossbeam, a movable crossbeam, a column, and a return oil cylinder. By integrating a hydraulic cylinder with a through hole for the column to slide, an annular hydraulic cylinder is formed between the movable crossbeam and the column, and no hole is required to be specially provided on the movable crossbeam for mounting the hydraulic cylinder. Therefore, the rigidity, strength and bending resistance of the movable crossbeam serving as an upper crossbeam or a lower crossbeam can be effectively guaranteed, the crossbeam structure is simplified, and the manufacturing difficulty is reduced. Meanwhile, compared with the existing hydraulic press of a three-crossbeam structure, the two-crossbeam hydraulic press can greatly reduce the overall dimension and mass of the high-speed forging hydraulic press, reduce the overall height of the hydraulic press.

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: 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: 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.