Abstract: A two-dimensional continuous-discontinuous combined numerical approach for solid fracturing simulation, which includes: discretizing two-dimensional solid into finite elements to obtain a mapping linked list relationship between master-slave nodes; determining whether a crack is initiated according to whether the local stress of the finite element satisfies a strength criterion; if a crack initiates, activating a corresponding pre-embedded cohesive element, updating the mapping linked list relationship between the master-slave nodes at the same time, the cohesive element at the crack enters a yield state, and the mechanical behavior thereof is controlled by a strain softening constitutive curve; and, according to the mapping linked list relationship between the master-slave nodes, accumulating node forces and masses of the slave nodes onto the master node, and updating the velocity and the displacement of the master-slave nodes by adopting a governing equation.

Abstract: The present disclosure provides an ion trap apparatus and a saddle point moving method for the ion trap apparatus. The ion trap apparatus comprises: an insulating base material, the insulating base material being a concave structure; and at least two segments of arc-shaped metal reflective electrodes, wherein the arc-shaped metal reflective electrodes cover the front side of the insulating base material, the front side being a concave surface; each segment of the arc-shaped metal reflective electrodes is electrically insulated; and each segment of the arc-shaped metal reflective electrodes is used to receive a radio frequency voltage which has the same frequency, the same phase and an adjustable amplitude. The apparatus may achieve ideal imaging while improving the light collection efficiency, thereby improving the success rate of the preparation of ion-photon entangled states.

Abstract: An image display method, an image display apparatus, a device and a storage medium.

Abstract: A water-retaining material, including: a polymer chain segment provided by a hydrophilic polymer; and a proton carrier group grafted to the polymer chain segment. The polymer chain segment contains a hydrophilic group. A method for preparing a water-retaining material, includes: performing, in a reaction system including an activator and a catalyst, a grafting reaction between a hydrophilic polymer and a proton carrier compound to yield the water-retaining material. The water-retaining material contains a polymer chain segment containing a hydrophilic group. A water-retaining proton exchange membrane, includes a matrix. The matrix is doped with a water-retaining material; and the water-retaining material including the above water-retaining material.

Abstract: A flexible electromyographic electrode array and a preparation method therefor, and an electromyographic signal collection apparatus and an electrophysiological signal collection method. The flexible electromyographic electrode array includes: a flexible substrate (100); several liquid metal electrodes, wherein the liquid metal electrodes are arranged on the flexible substrate (100), and the liquid metal electrodes each include a wire and a circuit board connection pattern (110) which is located at one end of a wire (120); and several electrode contacts (130), wherein each of the electrode contacts (130) is connected to the other end of the wire (120), and the electrode contacts (130) are made of a contact solution which contains a hydrophilic polymer and a poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate.

Abstract: Disclosed are a high-throughput preparation device for metal fiber based on multi powder and a method for preparing a metal fiber using the device. The high-throughput preparation device includes a metal powder conveying system, a metal powder mixing system, a metal powder melting system and a metal fiber forming system which are connected in sequence, where the metal powder melting system includes an induction powder melting device and a laser powder melting device which are independently disposed. The method for preparing a metal fiber using the high-throughput preparation device includes four steps: powder conveying, powder mixing, melting and forming.

Abstract: A multiview 3D image encoding method, apparatus, system and storage medium are provided. The encoding method may include the steps of acquiring image data, and obtaining depth information containing a depth value of each pixel in an image based on the image data; grouping the image data into blocks, and calculating a perceived angular resolution of each object in blocks based on the depth information of each object in blocks respectively, wherein the perceived angular resolution of an object in blocks is a required maximum angular resolution that enables identification of the object in blocks; and configuring a respective encoding parameter for each object in blocks based on the perceived angular resolution of a respective one object in blocks, where the encoding parameter is configured such that a requirement of respective encoding parameter for a respective object in blocks with a respective perceived angular resolution is met.

Abstract: The present invention provides a method for scalable fabrication of ultra-flat polycrystalline diamond membranes, the method comprising: (1) performing chemical vapor deposition on a growth substrate having diamond seeds thereon to grow a polycrystalline diamond membrane, wherein an exposed surface of the polycrystalline diamond membrane is a grown surface having a first roughness; and a surface bonded to the growth substrate is a buried surface; (2) bonding the grown surface to a transfer substrate using an adhesive; and (3) removing the growth substrate to expose the buried surface of the polycrystalline diamond membrane, wherein the buried surface has a second roughness after exposure, and the second roughness is less than the first roughness.

Abstract: A method, device, system, and medium for classifying green-blue-gray infrastructure. The method includes obtaining a multispectral photo corresponding to a target area, and obtaining an image set of a target and a color orthophoto, based on the multispectral photo; obtaining a sample file based on the color orthophoto, and obtaining a classification result of the green-blue-gray infrastructure corresponding to the target area based on the image set of the target and the sample file. The embodiments can obtain the image set of the target and the color orthophoto based on the multispectral photo corresponding to the target area and combine the sample file obtained from the color orthophoto with the image set of the target to obtain the classification result of the green-blue-gray infrastructure corresponding to the target area, thereby improving the accuracy and efficiency for classifying the green-blue-gray infrastructure.

Abstract: A receptor material, a synthesis method and use thereof is disclosed. The synthesis method of the receptor material includes: S1, reacting the compound shown in a formula I with LiAlH4 to obtain a compound shown in a formula II; S2, reacting the compound shown in the formula II with 1,10-phenanthroline-5,6-dione to obtain a compound shown in a formula III; S3, reacting the compound shown in the formula III with phosphorus oxychloride and N,N-dimethylformamide to obtain a compound shown in a formula IV; and S4, reacting the compound shown in the formula IV with (5,6-dihalo-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile. The receptor material provided by the present disclosure can effectively improve the open-circuit voltage and photoelectric conversion efficiency of organic photovoltaics cells including the receptor material. The present disclosure further provides an organic photovoltaic cell including the above receptor material and a method for preparing the organic photovoltaic cell.

Abstract: Provided are methods for treating coronavirus infections by administering modified nucleosides, ester and amino acid ester prodrugs of nucleoside, their pharmaceutically acceptable salts, and drug combination thereof, of Formula (I). The compounds, combination, and methods provided are particularly useful for preventing, mitigating, or treating coronavirus infections or cytopathic effects resulting from the replication or reproduction of coronaviruses and their variants, including SARS-CoV-2.

Abstract: Provided are a method for coupling any two qubits from among multiple superconducting qubits and a system thereof, which are applied to an occasion provided with a multi-superconducting-qubit array and a magnetic film material capable of implementing spin waves. The method includes: disposing a magnetic film material below a multi-superconducting-qubit array; forming, through a combination of magnetization directions of magnetic domains in the magnetic film material, multiple channels through which the spin waves pass; disposing multiple qubits of the multi-superconducting-qubit array above the multiple channels through which the spin waves pass correspondingly to implement a coupling between each qubit and the spin waves; and disposing at least two qubits above one spin wave channel and implementing a coupling between the at least two qubits through the coupling between each qubit and the spin waves.

Abstract: An opto chip for detecting a physical parameter of a liquid sample, comprising an optical structure monolithically integrated with a substrate layer and a functional layer, wherein the substrate layer is light-transmissive and configured to have an upper surface for receiving a droplet of the liquid sample and a lower surface bonded to the functional layer; and the functional layer comprises a light-emitting region and a light-detecting region with the light-emitting region being configured to emit measurement light. The light-detecting region is configured to receive reflected light derived from the measurement light and a signal reflecting the change in intensity thereof is converted into a photocurrent signal. A viscometer and detection method operated using the same opto chip technique. The need for complex external optical calibration is thus eliminated, making the viscometer easier to operate and reducing the overall size of the device.

Abstract: A system for treating nitrate nitrogen sewage by autotrophic denitrification subsurface flow constructed wetland and a method thereof. The system includes a wetland pool body, a wetland substrate, a water distribution device, a water outlet device, and plants. The wetland substrate is filled in the wetland pool body. The wetland substrate includes pyrite, volcanic rock, and biochar. The water distribution device is located at the top of the wetland pool body to distribute water into the wetland pool body, and the water outlet device is located at the bottom of the wetland pool body to collect treated sewage. The plant is planted in the wetland substrate. The dissolved oxygen concentration of the system for treating nitrate nitrogen sewage by autotrophic denitrification subsurface flow constructed wetland is maintained at 1.2˜2.8 mg/L.

Abstract: High-density three-dimensional (3-D) vertical memory (3D-MV) includes lightly-doped-segment (LDS) 3D-MV and non-circular-hole (NCH) 3D-MV. The preferred LDS 3D-MV takes advantage of longitudinal space, instead of lateral space, to guarantee normal write operation. On the other hand, the lateral cross-section of the memory hole of the preferred NCH 3D-MV includes at least two intersecting pairs of parallel sides, with each pair formed through a single DUV exposure and having a minimum spacing <50 nm.

Abstract: The present invention provides a scalable method for achieving shape control of diamond micro-nanoparticles, comprising air oxidizing diamond micro-nanoparticles grown by chemical vapor deposition and/or diamond micro-nanoparticles grown by high pressure and high temperature. The present invention achieves the controllable morphology transformation of diamond micro-nanoparticles via air oxidation treatment. It has been demonstrated that a series of unique shapes, including “flower” shaped, “hollow” structured, “pyramid” patterned on the surface, and “boomerang” shaped, can be achieved by altering the air oxidation parameters, i.e., temperature and duration. The scalable production of these differently shaped diamond micro-nanoparticles represents a significant scientific breakthrough together with a high commercial value.

Abstract: A screening method for an amino acid sequence of a protein nanopore, a protein nanopore, and applications thereof. The screening method includes: evaluating a characteristic sequence of a dual-pore structure, using a model to search for an amino acid sequence matched with the characteristic feature of the dual-pore structure, removing a redundant candidate sequence and then performing positioning and screening, calculating the matching length and envelope length of the candidate sequence, then performing registration to obtain a relative mismatching relationship with a known protein nanopore, and performing analysis to obtain a final sequence.

Abstract: The present invention discloses an ESD protection circuit comprising resistor vias. It comprises a plurality of ESD devices connected in parallel, with each ESD device comprising a resistor and a two-terminal switch (e.g. an OTS component) connected in series. The resistor is formed in a resistor via disposed vertically with the two-terminal switch and filled with at least a conductive material with high resistivity.

Abstract: Provided are a SiC/ZrC composite fiber, a preparation method and use thereof. The SiC/ZrC composite fiber has a diameter of 10 to 70 ?m. The method includes mixing liquid polycarbosilane with a zirconium-containing polymer to obtain a hybrid spinning solution, and then performing electrospinning to obtain a SiC/ZrC composite fiber precursor, crosslinking and thermally treating the SiC/ZrC composite fiber precursor in a protective atmosphere to obtain the SiC/ZrC composite fiber. The SiC/ZrC composite fiber is continuous and uniform, has an adjustable diameter, and thus has outstanding tensile strength and breaking strength and excellent high-temperature resistance. Without use of any organic solvent or spinning agent, the method achieves short process flow and high yield, indicating wide application prospects.

Abstract: A P-type gate HEMT device includes a substrate, a buffer layer, a channel layer, and a barrier layer sequentially arranged from bottom to top. A first P-type material layer is arranged on the barrier layer. A first source and a first drain are respectively arranged on two sides of the first P-type material layer. A first conductive layer is arranged on the first P-type material layer. A second P-type material layer is connected to the first P-type material layer. A second conductive layer is connected to the second P-type material layer. A third conductive layer is connected to the second P-type material layer. The first P-type material layer, the first source, the first drain, and the first conductive layer form a normally-off N-channel transistor. The second P-type material layer, the second conductive layer, and the third conductive layer form a normally-on P-channel transistor.