Abstract: The present disclosure provides a device and method for measuring a correlation between fatigue performance and a microstructure of a one-dimensional (1D) nanomaterial in situ in a transmission electron microscope (TEM), belongs to the technical field of in-situ testing and characterization of microstructures of nanomaterials. The device includes a chip part, a supporting part, and a control circuit. The supporting part is a bracket and a cable disposed on a transmission sample holder, and the circuit part consists of cables connected to the chip and a power supply capable of applying different waveforms, variable voltages, and variable frequencies. This design breaks through a traditional mechanical stress-driven fatigue performance test method, and achieves controllable adjustment of different amplitudes and cycles by using an electric field formed by a voltage and adjusting a voltage size and frequency, such that the 1D nanomaterial vibrates in the electric field to achieve fatigue performance testing.

Abstract: A high-power large-aperture fundamental mode vortex optical waveguide coherent VCSEL array is provided, and the coherent VCSEL array is a large-aperture array light-emitting structure, including an N electrode layer, an N-type DBR, an active region, an P-type DBR and a P electrode layer; micro/nanostructures pores with hexagonal lattice arrangement are etched on the surface of light output aperture on the each light-emitting unit mesa of the coherent VCSEL array, the micro/nanostructures pores are filled with highly doped semiconductor transparent materials to form a vortex optical waveguide structure.

Abstract: A high-power large-aperture fundamental mode vortex optical waveguide coherent VCSEL array is provided, and the coherent VCSEL array is a large-aperture array light-emitting structure, including an N electrode layer, an N-type DBR, an active region, an P-type DBR and a P electrode layer; micro/nanostructures pores with hexagonal lattice arrangement are etched on the surface of light output aperture on the each light-emitting unit mesa of the coherent VCSEL array, the micro/nanostructures pores are filled with highly doped semiconductor transparent materials to form a vortex optical waveguide structure.

Abstract: An electroactive bio-carrier module and a sewage treatment device using same are provided, which relate to the field of bioelectrochemistry and sewage treatment. The electroactive bio-carrier module is composed of an anode module and a cathode module made of a conductive material. The anode module is formed by connecting carbon fiber brushes in series and is of a vertically ring type structure; the cathode module is formed by connecting stainless steel meshes in series; the stainless steel meshes are in a folded horizontal stacked design; the anode and cathode modules are connected through an external lead wire to form a circuit. Surfaces of the anode and cathode modules can both enrich microorganisms, biofilms are formed on the surfaces. The electrode module is arranged in an up-flow type sewage treatment device and is used as an electroactive bio-carrier, to form a hybrid sewage treatment device with a built-in electroactive bio-carrier.

Abstract: A broadband laser system enhanced in the later part of mid infrared spectrum is provided, which can obtain a high power and wide spectrum laser output enhanced in the later part of mid infrared spectrum, and has the advantages of full fiber, compact structure and high ratio of power in the later part of mid infrared spectrum. It includes a mode-locked fiber laser, a pre amplifier, an optical fiber stretcher, an amplifier, a main amplifier, a first nonlinear optical fiber, a mid infrared amplifier and a second nonlinear optical fiber, which are connected in sequence, and each of them adopts a water cooling device or a thermo electric cooler, and is connected by optical fiber fusion.

Abstract: Disclosed are a method and device for realizing advanced nitrogen removal of mature landfill leachate and sludge reduction by using sludge fermentation products as carbon source, belonging to the field of biological treatment of sludge of high ammonia nitrogen wastewater.

Abstract: An acoustic field diffusion type electromagnetic acoustic transducer with improved periodic permanent magnets is provided, which includes periodic permanent magnets, a transducer framework, improved racetrack shaped coils and a transducer connector.

Abstract: A device and method for enhancing nitrogen and phosphorus removal based on a multistage AO partial denitrification coupled with Anammox process in combination with a sludge hydrolytic acidification mixture belong to the technical field of active sludge method wastewater treatment. A system includes a water tank, a water pump, a biochemical reaction zone, a hydrolytic acidification tank and other devices.

Abstract: An evaluation method for ecological performance of an asphalt-related material is provided. Firstly, working condition parameters are determined for evaluating the ecological performance of the asphalt-related material; secondly, based on the working condition parameters, a simulation test is performed on emission of asphalt-related pollutants during a preparation stage of the asphalt-related material; finally, based on a result of the simulation test, a quantitative evaluation of the ecological performance of the asphalt-related material is performed under different environmental impacts. The evaluation method is a laboratory scale simulation method based on measured pollutant emissions and various environmental impact factors, ultimately achieving laboratory scale ecological performance evaluation of the asphalt-related material, which has important reference value for green material selection of asphalt pavement.

Abstract: A cooperative transmission method based on adaptive terminal aggregation includes arranging a base station, several mobile terminals and several cooperative nodes, and further includes the following steps: S1, judging an aggregation form by a judgment node according to the quality of the first link and the quality of the second link; S2, based on a control signaling received from the base station, transmitting business data to the base station by a mobile terminal at the first-time point and within a specific resource; and S3, if the aggregation form is the cooperative node transmission, monitoring the business data transmitted via the mobile terminal at the first-time point in S2 by one or several cooperative nodes and decoding the business data. By dynamically adjusting the values of the first regulatory factor and the second regulatory factor, the adaptive terminal aggregation form with the lower energy-delay product for each user is selected.

Abstract: The disclosure discloses a method for enhancing denitrification of sewage with a low carbon-to-nitrogen ratio by using an electrode biocarrier, and relates to the field of sewage treatment. The disclosure uses a conductive material as a microbial carrier and a potentiostat to induce a micro-electric field for directional acclimation and enrichment of electroactive denitrification microorganisms, and realizes a high-efficiency denitrification of the sewage with a low carbon-to-nitrogen ratio. The disclosure aims to provide a technical method for solving the problem of deep denitrification of municipal sewage with a low carbon-to-nitrogen ratio.

Abstract: An optical fiber with a double-clad fluoride with low loss and high pump absorption efficiency, and its preparation method are provided. The gain optical fiber with the double-clad fluoride includes a fiber core, a D-shaped inner cladding, an outer cladding, and a polymer coating, wherein the fiber core, the inner cladding, and the outer cladding are all fluoride glass materials, and the polymer coating is a fluorinated ethylene propylene copolymer. The fiber core and inner cladding structure are prepared by a suction injection method, and the inner cladding is polished into a D-shaped structure, and the outer cladding is prepared by a core insertion casting method to form an optical fiber preform with D-shaped double-clad fluoride and draw an optical fiber.

Abstract: The present application provides a system and method for realizing partial anammox advanced nitrogen and phosphorus removal through mainstream and sidestream biofilm cyclic alternating for a municipal wastewater treatment plant. The system includes three main component units: a mainstream zone (a), an advanced treatment zone (b) and a side stream zone (c). Advanced nitrogen and phosphorus removal of the entire system is realized through cyclic alternating of biofilms. In the mainstream zone (a), the main function of an anaerobic/anoxic zone is to perform heterotrophic denitrification nitrogen removal, and partial denitrification/anammox autotrophic nitrogen removal, and the main function of an oxic zone is to remove organic matter, perform aerobic phosphorus uptake, and complete a nitrification reaction.

Abstract: A device and a method for maintaining the stability of anaerobic ammonium oxidation (anammox) by using a combined zeolite filler to resist water quality fluctuations are provided. The device includes a water inlet tank, an anammox reactor, and a water outlet tank, where the anammox reactor is filled with the combined zeolite filler maintained in a state of suspension, domestic sewage enters the anammox reactor through a water inlet pump, and effluent water enters the water outlet tank through an overflow port. The device combines the physical characteristics of zeolite adsorption of ammonium with the anammox process: when the concentration of ammonium in the influent water is too high, the zeolites will temporarily store the excess ammonium adsorbed; when the concentration of nitrite in the influent water is too high, the zeolites are capable to release the stored ammonium into a liquid phase through balanced adsorption desorption.

Abstract: A construction steel platform system using a tuned liquid damper (TLD) and a tuned mass damper (TMD) for composite tuned damping is provided. According to the construction steel platform system using a TLD and a TMD for composite tuned damping, a composite damper is composed of the TLD and the TMD overlapping each other, and a construction steel platform is placed above the double dampers. By adjusting a hole diameter of a partition plate in the TLD, a liquid level in a water tank, a stiffness of a spring at an edge of a friction support and mass of materials of a top of the steel platform, the whole steel platform system can achieve composite tuned damping. The TLD and the TMD can be flexibly combined in series or in parallel according to requirements of actual wind and earthquake loads.

Abstract: A multi-view human action recognition method based on hypergraph learning, comprising acquiring video data from P views, and further comprising the following steps: pre-processing the video data; constructing spatial hypergraphs based on joint information; constructing temporal hypergraphs based on the joint information; performing feature learning of the spatial hypergraphs and the temporal hypergraphs using hypergraph neural networks; and extracting higher order information represented by the hypergraphs, and performing action recognition of human actions.

Abstract: A method and device for in-situ enriching Anammox bacteria by conventional activated sludge, which belongs to a biological wastewater treatment technology. The device comprises a raw water tank, an anammox reactor and a water outlet tank.

Abstract: A method for detecting a dioxin emission concentration of a municipal solid waste incineration process based on multi-level feature selection. A grate furnace-based MSWI process is divided into a plurality of sub-processes. A correlation coefficient value, a mutual information value and a comprehensive evaluation value between each of original input features of the sub-processes and the DXN emission concentration are obtained, thereby obtaining first-level features. The first-level features are selected and statistically processed by adopting a GAPLS-based feature selection algorithm and according to redundancy between different features, thereby obtaining second-level features. Third-level features are obtained according to the first-level features and statistical results of the second-level features. A PLS algorithm-based DXN detection model is established based on model prediction performance and the third-level features.

Abstract: A rapid demagnetization method based on characteristics of magnetic media. In the method, basic information is obtained by a recognition module of magnetic media by means of multi-source sensing collaboration. The magnetic medium is identified by using a data processing technology and a magnetic medium identification algorithm, and then the characteristic information is extracted. Optimized set values of demagnetization parameters are obtained by a demagnetization parameter optimizing and setting module based on a demagnetization optimizing model. Demagnetization parameter set values are tracked by a closed-loop control module of a demagnetization magnetic field in combination with domain expert knowledge by using a closed-loop control mechanism integrated with a magnetic field control algorithm, a charging-discharging device, a magnetic field generating device, a magnetic field sensor and an environmental sensor, completing the rapid demagnetization of the magnetic medium.

Abstract: The present invention discloses a method for constructing a surface stress distribution cloud map based on critical refraction longitudinal wave detection. The method comprises: firstly, meshing a surface of a detected article; secondly, The mean transverse stress on different grid lines and the mean longitudinal stress on different grid lines were obtained by the critical refraction longitudinal wave detection method; next, calculating the equivalent stress of each mesh node according to the mean transverse stress on different mesh transverse lines and the mean longitudinal stress on different mesh longitudinal lines on the surface of the detected article; and finally, drawing a stress distribution cloud map of the surface of the detected article according to the equivalent stress. The present invention can obtain the stress situations at different points on the surface of the detected article.