Abstract: A space pen refill for an extravehicular activity, including a ball, a refill body, a fiber rod and a fiber ink-storage tube; the ball is rotatably connected in one end of the refill body, a segment of the ball is exposed outside the refill body, the fiber ink-storage tube is connected to an inside of the refill body, one end of the fiber rod is inserted into the fiber ink-storage tube, an other end of the fiber rod close to the ball is used to supply ink for the ball, an end face of an other end of the refill body is connected with first and second one-way valves, the first and second one-way valves are unidirectionally communicated with the inside and the outside of the refill body, and gas flow directions in the first and second one-way valves are opposite.

Abstract: An algorithm-driven digital ultraviolet (UV) lithography (DUL) method and apparatus used to fabricate high-quality optical waveguide and many other kinds of high-resolution microstructures without the use of a photomask. Instead of the use of an actual photomask, a virtual mask based on a spatial light modulator is used. The DUL method and apparatus can compensate for a proximity effect caused by light scattering and make the exposure adaptive to a nonlinear response curve of a photoresist, in which an exposure dose-map is created based on the bitmap of a designed pattern together with the optimization parameters determined by system configuration and the photoresist. To fabricate large-area patterns, a plurality of sliced exposure dose-submaps with transition zones that can depress the stitching error caused by mechanical mispositioning are generated for digital lithographic exposure process.

Abstract: The present disclosure relates to a method and system for determining transportation safety of pulverized coal. The method includes: acquiring coal particle data during transportation of pulverized coal, where the coal particle data is size data of a coal particle accumulation; determining a particle model of the coal particle accumulation during the transportation of the pulverized coal according to the size data; establishing a constitutive theoretical model to describe all flow regimes of a coal granular medium; numerically discretizing the constitutive theoretical model by using a numerical method to obtain discrete equations; calculating a movement process of the coal granular medium according to the discrete equations and the particle model of the coal granular medium to obtain a calculation result; plotting the calculation result by using post-processing software Tecplot to obtain relevant information of a coal particle flow; and determining whether the pulverized coal transportation process is safe.

Abstract: A system and method of generating binaural signals includes receiving, by a processing device, a sound signal including speech and noise components, and transforming, by the processing device using a deep neural network (DNN), the sound signal into a first signal and a second signal. The transforming further includes encoding, by an encoding layer of the DNN, the sound signal into a sound signal representation in a latent space, rendering, by a rendering layer of the DNN, the sound signal representation into a first signal representation and a second signal representation in the latent space, and decoding, by a decoding layer of the DNN, the first signal representation into the first signal and the second signal representation into the second signal.

Abstract: The disclosure relates to a video anomaly detection method based on human-machine cooperation, in which video frames and traditional descriptors of optical stream of an image are utilized as an input for auto-encoder neural network coding, and converted into a representation content of a hidden layer, and then the representation content of the hidden layer is decoded, reconstructed and output. The auto-encoder network is trained with normal samples. In a test stage, if an input is a normal sample, a final reconstructed error keeps high similarity with an input sample; on the contrary, if the input is an abnormal sample, the final reconstructed error deviates greatly from the input sample.

Abstract: An automated three-dimensional refrigerated warehouse for a meat industry is provided. A refrigerated warehouse body is provided with two groups of chain wheels, a chain is sleeved on each group of chain wheels, and a plurality of mounting blocks are uniformly mounted on the chain. The mounting blocks are connected to suspension rods, a supporting table is connected between bottom ends of the suspension rods, an opening is provided in a middle of the supporting table, and a loading cart is placed on the supporting table. The refrigerated warehouse body is connected to two supporting plates, a first electric push rod is arranged above each of the two supporting plates, and top ends of the two first electric push rods are provided with mounting plates. Top ends of the two mounting plates are provided with a horizontal second electric push rod and a horizontal third electric push rod respectively.

Abstract: A method for preparing an asymmetric wettable polyimide fiber-based photothermal aerogel is provided. The method includes the steps: uniformly mixing polyimide powder and a solvent, then, performing electrostatic spinning, and cutting an obtained fiber felt into pieces for later use; mixing the broken fibers, polyamic acid and tert-butyl alcohol, then, performing shearing to form a stable dispersion liquid for low-temperature directional freezing, and performing freeze-drying and high-temperature thermal imidization to obtain a polyimide fiber-based aerogel material; and soaking the above aerogel material in a hydrophilic monomer solution for a polymerization reaction, and then performing low-temperature directional freezing and freeze-drying to obtain a hydrophilic polyimide fiber-based aerogel.

Abstract: A device that uses a UV sensing element capable of converting photons from a high temperature thermal source, to an electrical current. Such current is then compared with the theoretical current to be obtained from a source with the dimensions of the actual source. The theoretical current is obtained by integrating.

Abstract: The present application relates to a dual-polarization-joint noise processing method and device. The present application compensates the discrete spectral coefficient noise on the X polarization state with noise information carried by the discrete spectral eigenvalue on the X, Y polarization states, and a correlation coefficient between the discrete spectral eigenvalue and the discrete spectral coefficient on the X polarization state. Similarly, compensating the discrete spectral coefficient noise on the Y polarization state with noise information carried by the discrete spectral eigenvalue on the X, Y polarization states, and a correlation coefficient between the discrete spectral eigenvalue and the discrete spectral coefficient on the Y polarization state.

Abstract: The present disclosure relates to a harmless and recycling treatment method for kitchen waste. The method includes: step S1: sorting the kitchen waste, deodorizing the kitchen waste, and then implementing a solid-liquid separation to the kitchen waste to obtain solid and filtrate; step S2: adjusting pH of the filtrate to 12-13, adding a demulsifier to the filtrate, standing still, recovering an upper layer of oil and obtaining a lower layer of clear liquid; drying and burning the solid obtained in the step S1, to obtain biochar; and step S3: implementing an advanced oxidation treatment and a biochemical treatment to the lower layer of clear liquid obtained in the step S2, to obtain water. The method can effectively recycle the kitchen waste into resources, alleviate the social and environmental problems caused by the current kitchen waste, and the method is suitable for popularization and application.

Abstract: A woven, water-vapor permeable, water-responsive, shape-memory wool fabric that possesses switchable pore size and shape responsive to varying water content absorbed thereby is demonstrated, more particularly, the wool fabric exerts corresponding thermal and water vapor regulations between the wearer and the surroundings with respect to the temperature and humidity changes.

Abstract: The present disclosure provides a bracewear for spinal correction and a system for posture training. The system for posture training involves both active and passive corrective forces by using the bracewear and a biofeedback system to address the spinal correction, which can eliminate the adversity of conventional hard braces and reduce the psychological and physiological barriers to treatment.

Abstract: Embodiments of the present disclosure provide a fuel cell power generation device, which includes: a fuel cell with an anode and a cathode, for decomposing hydrogen and generating electric energy through reaction of decomposed hydrogen and oxygen; a first delivery pipe connected between a pipeline of a hydrogen-containing gas and the fuel cell, for delivering the hydrogen-containing gas to the anode of the fuel cell; a first output pipe connected to the fuel cell, for discharging a first remaining gas contacted with the anode of the fuel cell; a second delivery pipe connected to the fuel cell, for delivering an oxygen-containing gas to the cathode of the fuel cell; and a second output pipe connected to the fuel cell, for discharging a second remaining gas contacted with the cathode of the fuel cell.

Abstract: A vehicle key capable of generating electrical energy by itself through energy harvesting, and a method of manufacturing the vehicle key are provided. The vehicle key includes a power generator including an energy generation module configured to generate electrical energy using energy harvesting and an electric condenser configured to store the generated electrical energy; an inputter configured to receive a user input; a communicator configured to communicate with the vehicle; and a controller configured to control the communicator to transmit a control signal corresponding to the received user input to the vehicle. At least one of the inputter, the communicator, and the controller may be configured to receive power from the power generator.

Abstract: A method of preparing antimicrobial 3D-printed material with antimicrobial agents integrated with the 3D-printed material. The 3D-printed material fabricated with the method of the present disclosure includes antimicrobial agent (s) fully integrated throughout the product and display antimicrobial effect throughout the product, which is resistant to daily wear and tear.

Abstract: A device and a method for continuous temperature gradient heat treatment of a rod-shaped material are disclosed. The furnace body of the device includes an upper heating zone and a lower heating zone inside, which are independently controlled in temperature by means of an upper heating power supply and a lower heating power supply. Moreover, both the upper heating zone and the lower heating zone are closed heating zones. The closed heat insulation plates could prevent heat loss and ensure precise temperature control of the upper heating zone and the lower heating zone. In the device, a vacuum pumping equipment is included; an annular radiation screen is configured between the upper heating zone and the lower heating zone, and the rod-shaped material is not in contact with the annular radiation screen The rod-shaped material conducts one-dimensional heat transfer along the axial direction.

Abstract: A feature extraction deep neural network (DNN) may be trained based on the minimization of a loss function. A similarity function may be specified to calculate a similarity score for two representations of verbal utterances. A training data set comprising pairs of representations of utterances is received, wherein each one of the pairs of representations of utterances is associated with a corresponding a ground-truth label confirming whether the pair of represented utterances come from a same speaker or not. A respective similarity score may then be calculated for each one of the pairs of representations of utterances. Parameters associated with the DNN may then be updated based on minimizing a loss function associated with an area under a section of a receiver-operating-characteristic (ROC) curve for the similarity scores, wherein the ROC curve section is delimited between a low false positive rate (FPR) value and a high FPR value.

Abstract: A first-order differential microphone array (FODMA) with a steerable beamformer is constructed by specifying a target beampattern for the FODMA at a steering angle ? and then decomposing the target beampattern into a first sub-beampattern and a second sub-beampattern based on the steering angle ?. A first sub-beamformer and a second sub-beamformer are generated to each filter signals from microphones of the FODMA, wherein the first sub-beamformer is associated with the first sub-beampattern, and the second sub-beamformer is associated with the second sub-beampattern. The steerable beamformer is then generated based on the first sub-beamformer and the second sub-beamformer. The decomposing of the target beampattern into a first sub-beampattern and a second sub-beampattern includes dividing the target beampattern into a sum of a first-order cosine (cardioid) first sub-beampattern and a first-order sinusoidal (dipole) second sub-beampattern.

Abstract: The disclosure provides a eutectic ceramic thermal barrier material and a preparation method thereof, which relates to the field of composite materials. The present disclosure provides a eutectic ceramic thermal barrier material comprising a nickel-based superalloy substrate, an intermediate binding layer and a eutectic ceramic cladding layer stacked sequentially; the intermediate binding layer comprises a NiCoCrAlY binding layer; the eutectic ceramic cladding layer comprises an Al2O3/GdAlO3 binary eutectic ceramic coating or an Al2O3/GdAlO3/ZrO2 ternary eutectic ceramic coating. The eutectic ceramic thermal barrier material provided by the present disclosure has good high temperature resistance, good oxidation resistance and excellent mechanical properties.

Abstract: The present disclosure relates to the technical field of unmanned aerial vehicle (UAV) tests, and more particularly, to an electromagnetic release device for use in vertical falling tests of tri-rotor UAVs and including a mounting frame and multiple clamping and release modules arranged on the mounting frame. movable kits, which include a ferromagnetic plate matching and connected with the electromagnetic adsorption assembly, one end of the ferromagnetic plate is hinged with the electromagnet mounting frame, and the other end of the ferromagnetic plate is connected with the UAV connecting plate; The present disclosure uses electromagnetic control to accurately control the simultaneous opening of three clamping and release modules of a UAV, realizes the release and landing of the UAV in a horizontal status, and is characterized by simple structure and easy operation.