Abstract: A creep strength analysis and assessment method includes comparing whether a maximum value of a local strain and a membrane strain are less than a corresponding allowable strain, and if less, determining that a component is safe; otherwise, performing the following steps: performing stress linearization on a path to obtain a local primary membrane stress PL and a local primary bending stress Pb; averaging shear stress components on the path to obtain an average shear stress ?m; obtaining a strength limit Smt, a time-independent minimum stress strength value Sm and a temperature- and time-dependent stress strength limit St for a given material, a design lifetime and a design temperature; comparing whether PL, PL+Pb and PL+Pb/Kt are less than Smt, KSm and St; and comparing whether ?m is less than 0.6Sm and 0.6St, and if less, the component is safe, otherwise, the component is unsafe.

Abstract: A spin-sensitive ultraviolet light-based device includes a p-type GaN layer; an n-type Gd doped ZnO nanostructure grown on the GaN layer; a first electrode formed on the GaN layer; and a second electrode formed on the Gd doped ZnO nanostructure. Electrons supplied through the first and second electrodes are spin-polarized by the Gd doped ZnO nanostructure. Polarized ultraviolet light emitted or received by the Gd doped ZnO nanostructure is correlated with the spin-polarized electrons.

Abstract: A bridge detecting vehicle with two foldable arms, including: a vehicle body, slewing mechanisms, horizontal and vertical arms and telescopic arms. One end of the two horizontal arms is respectively arranged on the slewing mechanisms, and the other end of the two horizontal arms is respectively connected to the two horizontal arms. A crossed arm is provided between the two horizontal arms. The two vertical arms are respectively connected to the two horizontal arms via ball joints. A detecting device is respectively provided at rear ends of the two telescopic arms.

Abstract: A negative electrode material for a lithium ion battery comprises a carbon material, a silicon nanomaterial, and a first solvent. The carbon material comprises carbon nanotubes. The carbon material and the silicon nanomaterial are uniformly mixed in the first solvent. The weight percentage of the silicon nanomaterial is between 1% and 30%, and the amount of the carbon material is 1% to 30% of the amount of the silicon nanomaterial. A negative electrode composite slurry for a lithium ion battery comprises the negative electrode material and a graphite mixture material. The graphite mixture material comprises graphite and a second solvent. The graphite is uniformly mixed in the second solvent, and the weight percentage of the graphite is between 20% and 40%.

Abstract: The present disclosure provides a forward converter with secondary LCD connected in series to realize excitation energy transfer, comprising a forward converter main circuit and an energy transfer and transmission circuit. The forward converter main circuit includes a high-frequency transformer T, a switching tube S, a diode D1, a diode D2, an inductance L1, and a capacitor C1. The energy transfer and transmission circuit includes a diode D3, a capacitor C2, and an inductance L2. The circuit structure of the present disclosure has simple circuit structure and high reliability. And the reverse recovery problem of the diode could be eliminated by the soft switch-off or soft switch-on of the switching tube, which further reducing the loss of switching tube and diodes and improving the overall efficiency. In addition, the excitation energy could be transferred to the load side to improve the energy transmission efficiency.

Abstract: A fast-response direct-current current transformer based on multi-sensor fusion is provided and includes: a magnetic modulator, a current correction module, an excitation transformer, an alternating current detection and filtering circuit, a phase-sensitive demodulation and filtering system, a PI controller, and a power amplifier. The current correction module measures a primary current and obtain a feed-forward signal, outputs a false balance state configured to control a magnetic core to quickly exit or avoid entering magnetic saturation after amplifying the feed-forward signal and a PI control signal, and keeps output of the magnetic modulator stable. The magnetic modulator and Hall current sensors are fused in the disclosure, such that the possibility of failure due to a false balance problem caused by saturation of a magnetic core is reduced. After the false balance is generated the magnetic core may be controlled to quickly exit a magnetic saturation state through a feed-forward output current.

Abstract: Provided is a quantum sensor based on a rare-earth-ion doped optical crystal, having: a rare-earth-ion doped optical crystal; a low temperature providing unit, which provides a low temperature operating environment to the rare-earth-ion doped optical crystal; a constant magnetic field generation unit, which applies a constant magnetic field to the rare-earth-ion doped optical crystal; a light field generation unit, which provides a light field performing optical pumping on the rare-earth-ion doped optical crystal to prepare the rare-earth-ions in an initial spin state, and a light field for exciting Raman scattering of the rare-earth-ion doped optical crystal; a pulsed magnetic field generation unit, which applies a pulsed magnetic field perpendicular to the constant magnetic field to the rare-earth-ion doped optical crystal to make the rare-earth-ion doped optical crystal generate a spin echo; and a heterodyne Raman scattering light field detection and analysis unit, which detects and analyzes a Raman scatte

Abstract: The present invention provides an autonomous cleaning robot device for cleaning in the animal husbandry environment. The cleaning robot is composed of a master machine (autonomous moving controller) and a slave machine (self-propelled cleaning head). The master machine and the slave machine are connected by a robotic arm and a traction hose. The robotic arm can adapt to the movement of the cleaning slave machine to reduce the resistance and secondary pollution or damage caused by friction between the traction cable and the ground during the movement. The traction hose combined with the robotic arm allows slave machine to enter and exit the fence without opening and closing the door to improve efficiency. In the treatment of dirt, the excrement is collected by a suction driving device, and is centrally collected in a storage tank, and then is compacted into blocks by the excrement compression device.

Abstract: A mechanical frequency upconverter includes a body having a cavity. A low-frequency membrane is coupled to the body and arranged adjacent to the cavity. The low-frequency membrane is a permanent magnet or a permanent magnet is affixed to the low-frequency membrane. A high-frequency membrane is coupled to the body and arranged adjacent to the cavity. The high-frequency membrane includes a magnetic metal. Oscillation of the low-frequency membrane at a first frequency causes the high-frequency membrane to oscillate at a second frequency, which is higher than the first frequency.

Abstract: A cylinder structure of a rotary piston internal combustion engine includes a rotating shaft, the two sides of the rotating shaft are installed on machine bases, front deflector rods and rear deflectors rod are fixed to the two outer ends of the rotating shaft respectively, the included angles between the front deflector rods and the rear deflector rods are 29 degrees, the front deflector rods at the two outer ends are arranged in the radial direction of the rotating shaft at 180 degrees, and the rear deflector rods at the two outer ends are arranged in the radial direction of the rotating shaft at 180 degrees, and a combustion device and a compression device are sequentially arranged between the two machine bases.

Abstract: An example method of removing hydrogen sulfide from an input gas includes exposing an adsorbent material to an input gas to obtain an output gas. A concentration of hydrogen sulfide of the output gas is less than a concentration of hydrogen sulfide of the input gas. The adsorbent material includes copper oxide, magnesium oxide, and aluminum oxide. An atomic ratio of copper to magnesium to aluminum of the adsorbent material is X:Y:Z, where X is greater than or equal to 0.6 and less than or equal to 0.9, where Y is greater than or equal to 0 and less than or equal to 0.2, where Z is greater than or equal to 0 and less than or equal to 0.2, and where X+Y+Z is equal to 1.

Abstract: The disclosure proposes a novel method for generating public polynomials. The method simplifies key exchange processes, reduces the time required for key exchange and reduces the bandwidth required for data transmission from a server to a client. Secondly, the method keeps the calculation processes at both sides synchronized through a novel data exchange solution, particularly through handshaking signals, to ensure that the server and the client are always in the same key exchange process. In addition, the method further reduces a transmission bandwidth by sending information of the client twice. A state synchronization mechanism of the client and the server is proposed in the disclosure to ensure that Trivium modules at both sides are in the same state at the beginning of each key exchange, thereby avoiding reinitializing the modules and improving the operation efficiency of the whole system.

Abstract: A wireless sensor network deployment structure combined with SFFT and COA and a frequency spectrum reconstruction method therefor. The wireless sensor network deployment structure includes: frequency spectrum acquisition sensor nodes dispersed in each region, and a sink node, wherein all the frequency spectrum acquisition sensor nodes have the same structure, and include: a broadband frequency spectrum antenna, a delayer, an ADC, a first baseband processing module, a DAC and a transmitting antenna that are successively connected; all the frequency spectrum acquisition sensor nodes are cooperated to realize SFFT and COA of signals; the signals transmitted by all the frequency spectrum acquisition sensor nodes are superimposed over the air and received by the sink node; and the sink node extracts a data domain from a received signal frame by post-processing, thereby completing frequency spectrum reconstruction.

Abstract: A solar-powered system including a chamber that is bordered by an evaporation layer and a condensation layer; and a photothermal layer located over the evaporation layer so that sun rays incident on the photothermal layer are transformed into heat and the heat is supplied to the evaporation layer for evaporating water. The sun rays incident on the photothermal layer do not pass through the condensation layer prior to arriving at the photothermal layer.

Abstract: A magnetic field measurement device and a magnetic field measurement method based on solid-state spins are provided. Zeeman splitting between electron energy levels of electrons of a magnetic sensitive unit is different under the action of external magnetic fields having different intensities. Continuous excitation and manipulation is applied to the electrons by means of a control field and control laser, so that spins of a system can reach a balanced state. The spin population of the system is influenced by the external magnetic fields. Therefore, fluorescence signals with intensities changing with the spin population of the system can be obtained, and fluorescent signals having different intensities can be obtained according to the different intensities of the external magnetic fields.

Abstract: Disclosed are a switch display apparatus and an assembling method thereof. The apparatus includes a display unit (1), a support unit (2), and a base unit (3) that are arranged sequentially from top to bottom. The display unit (1) includes a display device (4), a combined lens (5), and a display device and combined lens support component (6). The combined lens (5) is located above the display device (4). Both the display device (4) and the combined lens (5) are located inside the display device and combined lens support component (6). The display device and combined lens support component (6) includes a first support part (9) used for providing structural support for the combined lens (5), and a second support part (10) used for providing structural support for the display device (4).

Abstract: The disclosure discloses a linear oscillatory machine control method based on an adaptive full-order displacement observer.

Abstract: The disclosure belongs to a technical field related to metamaterials and discloses a multi-scale three-dimensional pentamode metamaterial and an additive manufacturing method thereof. The multi-scale three-dimensional pentamode metamaterial has a body centered cubic (BCC) structure and includes a plurality of rods and a plurality of node structures. Two ends of each of the rods are connected to the node structures. Each of the rods has a cylindrical shape and is provided with a biconical through hole. From one end of the rod towards the other end of the rod, a diameter of the biconical through hole gradually decreases and then gradually increases. A chamber is formed inside each of the node structures, the biconical through hole communicates with the chamber, and the chamber is filled with a lattice structure.

Abstract: The disclosure discloses an AI-based condition classification system for patients with novel coronavirus, which includes: a classification model acquisition module for training one or more binary classification models that classify patient conditions according to patient data, and obtain the most accurate binary classification model as the target model, and determine the interpretable features in the patient data; a preprocessing module is configured to extract the interpretable features in the patient data to be classified, and then perform preprocessing on the extracted features to fill in the missing values and replace the abnormal values in the data, so as to obtain the features to be classified after the preprocessing is completed; a condition classification module is configured to use the features to be classified as the input for the target model, and the target model is used to complete condition classification for the patients to be classified.

Abstract: A preparation method of a cube-like ZnSnO3 composite coated with highly graphitized fine ash comprises steps: S1: with the gasified fine slag of pulverized coal as a raw material, preparing the fine ash by adopting a three-step acidification method; and S2: adding the fine ash prepared in the Si into a container filled with distilled water, ultrasonically dispersing for 20-40 min, adding equal molar masses of SnCl4.5H2O and (Zn(NO3).6H2O respectively, uniformly stirring, dropwise adding ammonia into the mixed solution and magnetically stirring until the pH value of the mixed solution is 12, heating the mixed solution, washing the product obtained with deionized water and ethanol for 2-4 times, and finally drying to obtain a ZnSnO3@fine composite. With the dielectric property and conductivity adjusted, the composite prepared reveals a good impedance matching performance and an improved MA performance.