Abstract: A signal processing method and device are disclosed. The method include: receiving a first signal; processing the first signal to obtain a squared complex envelope of the first signal; obtaining a second signal by processing the squared complex envelope of the first signal using a first filter, where a cutoff frequency of the first filter is determined according to an average-to-peak power ratio of a squared complex envelope spectrum of a third signal, the third signal is obtained by processing the first signal using a second filter, and a cutoff frequency of the second filter is determined according to a bandwidth occupied by the first signal; determining a squared complex envelope spectrum of the second signal; and determining a symbol rate corresponding to the first signal according to the squared complex envelope spectrum of the second signal. As such, the symbol rate of the signal can be determined accurately.

Abstract: Provided is a dynamic true triaxial electromagnetic Hopkinson bar leveling and centering system and method. The system comprises a supporting base, a micrometer adjusting knob, a sliding platform, an auxiliary supporting plate, a fixing groove, at least two auxiliary centering targets and a lamp source. According to the auxiliary centering system, a principle that light rays are straight lines and two points form one line is adopted, and adjacent perpendicularity and coaxial centering leveling of a bar piece are determined by respectively adjusting a center of a loading end surface of the bar piece and an upper surface of the bar piece.

Abstract: The present disclosure provides a compound and methods of preparing the compound. The compound has anti-microbial and anti-mite properties and can be bonded to materials such as fiber and synthetic polymer. The compound may also be used in a finishing agent for textiles, fibers, or yarns to protect these materials against microorganisms and mites. Additionally, when these materials are treated with a relatively low dosage of the compound, long-lasting and effective anti-mold and anti-mite effects may be achieved at a relatively low cost.

Abstract: Disclosed is a method for scheduling cars at a narrow curve based on a parking space for temporary avoidance. The method includes: fusing car data obtained by laser radar and millimeter wave radar, so as to predict car states and driving trajectories of meeting cars; computing an expected meeting point of the cars through prediction of the driving trajectories of the cars; and executing, on the basis of the expected meeting point, different car avoidance strategies according to road conditions and a number of parking spaces for temporary avoidance, so as to implement car avoidance and scheduling of car meeting at the narrow curve.

Abstract: Provided is a series of homologous small molecule immune agonists and novel bifunctional immune targeting compounds having targeting and immune activation functions, which are obtained by coupling the small molecule immune agonists to targeting drugs. The resulting immune targeting compounds are beneficial for enhancing immune activation effects, and anti-tumor and other disease fighting effects of the targeting drug. The enhanced effect is produced from a synergy of immunological anti-tumor factors (such as IFN-?) and inhibition at pathogenic targeting sites.

Abstract: Provided is a stress blank angle eliminating device and method for a dynamic true triaxial electromagnetic Hopkinson bar. Objectives of eliminating influence of a stress blank angle in a sample in a test and preventing permanent deformation caused by mutual collision between the Hopkinson bars are achieved. The adjustable test device for eliminating the stress blank angle eliminates influence of the stress blank angle generated by the sample in a triaxial six-direction dynamic impact test process, and is convenient for obtaining real dynamic failure parameters of the sample.

Abstract: Disclosed are a method, an apparatus, a device, and a medium for image recognition via wireless federated learning. The method for image recognition via wireless federated learning includes: obtaining an image to be recognized and an initial image recognition model; adjusting parameters for the initial image recognition model via a preset accelerated mobile federated learning algorithm according to a target momentum factor to obtain a target image recognition model; and recognizing the image to be recognized through the target image recognition model to obtain text information corresponding to the image to be recognized.

Abstract: A method, device, computing equipment, and storage medium for predicting the drift of the floating object are provided. A method for predicting drift velocity includes: obtaining environmental characteristic parameters at the location of the floating object to be predicted, wherein the environmental characteristic parameters include wave characteristic parameters; inputting the wave characteristic parameters into a deep learning model for wave-induced drift velocity to obtain the wave-induced drift velocity; wherein the deep learning model for wave-induced drift velocity is trained based on first sample drift data, wherein the first sample drift data includes observed drift velocity of sample floating objects, corresponding sample water surface flow characteristic parameters, sample wind characteristic parameters, and sample wave characteristic parameters.

Abstract: A Carbon Fiber Reinforced Polymer (CFRP) concrete composite component with partitioned cathodic protection and an operation and maintenance method thereof are provided. The composite component includes multiple longitudinal reinforcements, in which a first area, a second area and a third area corresponding to underwater, splash and atmosphere are arranged along an extending direction of each longitudinal reinforcement, respectively; a first spiral rib, which is wound around the multiple longitudinal reinforcements in the first area; a second spiral rib, which is wound around the multiple longitudinal reinforcements in the second area; a third spiral rib, which is wound around the multiple longitudinal reinforcements in the third area; a concrete; a power supply, where the first spiral rib, the second spiral rib and the third spiral rib are connected with a positive electrode of the power supply, and the longitudinal reinforcement is connected with a negative electrode of the power supply.

Abstract: A method for synthesis, assembly and function test of an artificial chloroplast genome of Chlamydomonas reinhardtii. Rational design has been carried out on the Chlamydomonas reinhardtii chloroplast genome for the first time, and total artificial synthesis of the Chlamydomonas reinhardtii chloroplast genome is proposed. By using totally chemically synthesized chloroplast genome segments, total chemical de novo synthesis and assembly of a chloroplast genome are achieved in a yeast-bacterium system. Then, a totally chemically synthesized chloroplast genome is transformed into Chlamydomonas cells to replace the original chloroplast genome, which works normally, and has been verified, fulfilling biological functions of the totally chemically synthesized chloroplast genome. According to the embodiments, the Chlamydomonas reinhardtii chloroplast genome is an efficient platform for carrying out synthetic biology operation.

Abstract: A microneedle patch for enhancing accumulation of PpIX in a solid tumor and a preparation method therefor. The method includes steps of: dissolving albumin into Dubos medium, taking the albumin as a template, adding CuCl2 and CaCl2 for mineralization to obtain CCP nanoparticles; loading CAT and 5-ALA onto a surface of the CCP nanoparticles by a one-step carbodiimide coupling method and an electrostatic-adsorption method, respectively, to obtain CCPCA nanoparticles; loading the CCPCA nanoparticles and microneedle-matrix solution into a microneedle mold, after vacuum drying and demolding, obtaining the microneedle patch for enhancing accumulation of PpIX in a solid tumor.

Abstract: A battery malfunction detection method includes: applying a preset number of vibration signals with different frequencies to a battery to be detected through a vibration generation device; collecting a response signal of the battery to be detected through a response collection device, where the response signal includes the preset number of vibration response amplitudes of the battery to be detected; determining whether the battery to be detected is malfunctioning according to the response signal.

Abstract: A Chlamydomonas reinhardtii chloroplast-Saccharomyces cerevisiae-Escherichia coli shuttle vector and a construction method and use thereof. The construction method includes design, chemical synthesis, assembly and identification of a shuttle vector, as well as replication of the shuttle vector in Escherichia coli. The constructed shuttle vector is capable of shuttling and replicating among the Escherichia coli, a yeast, and a Chlamydomonas reinhardtii chloroplast. The shuttle vector of the present invention includes a replication element (CEN) for the yeast, a replication element (ori) for the Escherichia coli, and a Chlamydomonas reinhardtii chloroplast genome (SynCp V1.0).

Abstract: The present disclosure relates to a method and system for quantitative damage monitoring of a reinforced concrete structure and belongs to the technical field of civil engineering.

Abstract: The present disclosure provides a conductive paste for preparing flexible porous piezoresistive sensor, a method for making the same, and application thereof. The conductive paste includes a conductive carbon material, a sacrificial template and a high molecular polymer matrix. The high molecular polymer matrix includes a high molecular polymer and an organic solvent, and the mass ratio of the high molecular polymer to the organic solvent is 1:2 to 1:3; and based on the total mass of the conductive carbon material, the sacrificial template and the high molecular polymer, the mass percentage of the conductive carbon material is 2%-5%, the mass percentage of the sacrificial template is 75%-85%, and the mass percentage of the high molecular polymer is 10%-23%. This disclosure uses a sacrificial template with adjustable particle size to prepare conductive paste, greatly increasing number of nanopores or micropores after conductive paste is formed into a film.

Abstract: Disclosed is a magnetic pressure retaining control device, which comprises: a valve seat, a magnetic valve cover, and a trigger magnetic member for repelling the magnetic valve cover; the magnetic valve cover and an open end of the valve seat are movably connected; when the magnetic valve cover is in an open state, the trigger magnetic member is opposite to an end surface of the magnetic valve cover away from an inside of the valve seat. A cylindrical magnet is also arranged in the valve seat. By the magnetic between the trigger magnet and the magnetic valve cover, and the magnetic between the magnetic valve cover and the valve seat, a reliable guarantee for the closure between the magnetic valve cover and the valve seat is provided. The valve seat and the valve cover are tightly closed under different conditions.

Abstract: A method and a system for recognizing a two-dimensional (2D) movement track based on a smart watch is provided. The method comprises: acquiring accelerometer signal data and gyroscope signal data of the smart watch; estimating a tilt angle of the smart watch by using the accelerometer signal data and correcting the gyroscope signal data by using the tilt angle; and calculating angle value information of the smart watch by using the corrected gyroscope signal data and estimating a coordinate point. According to the present application, the movement track of the smart watch can be accurately estimated by using the accelerometer and the gyroscope built in the smart watch.

Abstract: Disclosed are a method for preparing a non-sintered shell-wrapped ceramsite using solid waste meanwhile immobilizing a heavy metal in river sediment, and a non-sintered river-sediment-based shell-wrapped ceramsite, which relate to the technical field of building materials. The disclosure combines river sediment with a solid waste powder and an alkali activating powder material, and adopts multiple-step granulations to realize particle size control and physical pore formation, thereby obtaining a non-sintered ceramsite. A sulfoaluminate cement and a Portland cement are used to encapsulate the non-sintered ceramsite and form a shell by wrapping, thereby preparing a non-sintered river-sediment-based shell-wrapped ceramsite with internal porosity and dense shell.

Abstract: The present invention relates to the technical field of electronic materials, and specifically relates to a binuclear metal platinum complex and an organic electroluminescent device. The binuclear metal platinum complex provided by the present invention has a structure as shown in formula I, and has high luminous efficiency and excellent thermal stability. Therefore, an OLED device prepared from the binuclear metal platinum complex as a luminescent layer material shows high external quantum efficiency and relatively low luminous efficiency roll-off.

Abstract: Disclosed are a dynamic disturbance-induced rock burst test device and a test method. The test device comprise a supporting platform, a plurality of loading plates, an electromagnetic pulse emitting system, an acoustic emission monitoring system, a high-speed camera, an electromagnetic radiation detecting system and a confining pressure servo control loading system. The plurality of loading plates are arranged on a side wall of a coal rock sample and are placed inside a square chest, the electromagnetic pulse emitting system and the confining pressure servo control loading system are arranged inside a bar system, and an acoustic emission probe is arranged inside the loading plate. A three-dimensional real stress environment of the coal rock is simulated by simulating a shear stress through friction between the loading plate and the sample, as well as dynamic and static combined loading of multi-axial and multi-directional static confining pressure and stress wave disturbance.