15results about How to "Suitable for engineering applications" patented technology

The invention discloses an electrical load aggregation scheduling method considering thermal dynamic characteristics of a building. The method comprises the following steps: constructing an equivalent thermal resistance-thermal capacity physical model of each single building in an office park; data are collected in real time, model parameters are updated through an online recursion identification algorithm, and a digital twin heat dynamic model is obtained; aggregating the buildings into a virtual aggregation group based on thermal dynamic response characteristics, and constructing an aggregation load response characteristic curve; double-layer optimization scheduling is executed, the upper layer solves a total air conditioner load power reference curve of each virtual aggregation group with the purpose of minimizing the total power utilization cost of the park, and the lower layer decomposes the reference curve to each single building and generates a control instruction; and calibrating the model parameters according to the fed back actual indoor temperature. According to the method, the capacity of the scheduling system for dealing with uncertainty is remarkably improved, and the physical feasibility and the actual execution effect of the scheduling instruction are guaranteed.

This invention relates to a quadrilateral photonic crystal fiber filter based on dual-wavelength filtering, belonging to the field of fiber optics and photonic device technology. It includes a substrate and a fiber core disposed within the substrate, and a cladding surrounding the fiber core. The cladding contains multiple layers of air holes extending along the fiber axis, arranged periodically in a two-dimensional quadrilateral lattice. A metal thin film is disposed within the cladding to excite surface plasmon resonance (SPR). At least one non-circular air hole is also disposed within the cladding to enhance the birefringence of the fiber. The multiple air holes, metal thin film, and non-circular air holes enable the filter to selectively filter orthogonal polarization states in two different communication bands. This invention, based on SPR and employing a quadrilateral lattice structure, achieves polarization-selective filtering in two communication bands and exhibits good tolerance to manufacturing errors; simultaneously, its regular structure makes it easy to manufacture.

This invention belongs to the field of wastewater treatment technology, specifically relating to a method for preparing a sponge iron-based ferrous silicate reducing agent for wastewater treatment. Sponge iron is activated in a dilute phosphoric acid solution to obtain activated sponge iron; the activated sponge iron is washed and then immersed in a ferrous solution, removed and washed, and then matured in a sodium silicate solution to obtain matured sponge iron; the matured sponge iron is washed and freeze-dried to obtain the sponge iron-based ferrous silicate reducing agent. The sponge iron-based ferrous silicate reducing agent prepared by this invention is easily separated from the effluent and has excellent and long-lasting reducing performance. It solves the problems of high reducing agent dosage, high salinity of the treated effluent, generation of large amounts of iron sludge, and the need for continuous addition of reducing agent in traditional reduction processes. Furthermore, the preparation method is simple, requiring no complex equipment or catalysts, and the raw material, sponge iron, is inexpensive and widely available, resulting in low production costs and suitability for large-scale preparation and engineering applications.

The application belongs to the field of steel material and its preparation technology, and discloses a high strength and toughness steel plate for liquid hydrogen storage and transportation and a preparation method thereof. The mass percentage of each chemical component is controlled and the film-like reversed austenite formation tendency index is satisfied. Through reasonable component proportioning, high cleanliness smelting, continuous casting, rolling and heat treatment synergic control, a dual-phase structure of tempered martensite and film-like reversed austenite is obtained, the volume fraction of the film-like reversed austenite is 8% to 20%, and the volume fraction of the block or island-like reversed austenite is not more than 3%. The steel plate has the room temperature yield strength of greater than or equal to 600 MPa, the tensile strength of greater than or equal to 750 MPa and the impact energy of greater than or equal to 70 J at-253 DEG C in the thickness range of 6 to 50 mm, the structure and performance in the thickness direction are uniform, the steel plate has high strength, super-low temperature high toughness and excellent hydrogen damage resistance, and is suitable for liquid hydrogen storage tanks and related low-temperature pressure vessels.

The invention is applicable to the technical field of solid waste resource utilization and novel building material preparation, and provides solid waste based lightweight fine-grained ceramsite as well as a preparation method and application thereof, and the ceramsite is prepared from titanium gypsum, iron tailing powder, a solid waste based cementing material, a chelating agent, a nanocrystalline nucleus early strength agent and mixing water according to a specific proportion. The preparation method comprises the following steps: dry mixing of raw materials, preparation of an additive solution, wet mixing, rolling granulation, normal-temperature curing, 60-95 DEG C low-temperature steam curing and drying. According to the invention, the titanium gypsum, the iron tailing powder and other low-value solid wastes are used as main raw materials, and the lightweight fine-grained ceramsite with small particle size, stable structure, low water absorption and low dry density is successfully prepared through an optimized ratio and a unique low-temperature steam curing process. The product can be used as a fine aggregate to be applied to plastering mortar, completely or partially replaces natural gravel, and the mechanical property and construction stability of the mortar are improved while the mortar capacity is reduced.

The invention belongs to the technical field of magnetic measurement, and particularly relates to a calibration method of a magnetic dipole array. The method comprises the following steps: S1, obtaining an independent calibration model of each magnetic source unit; and S2, according to the independent calibration model, measuring and modeling an additional magnetic field generated by coupling between the magnetic source units, and establishing a compensation model. According to the method, the problem is decomposed into N low-dimensional nonlinear fitting and one linear least square problem, the calculation complexity and time consumption are reduced in order of magnitude, and high efficiency in engineering application is achieved.

This invention provides a method and system for locating harmonic sources, relating to the field of power distribution network technology. The method includes acquiring a topology diagram of a power distribution network and acquiring at least one node in the topology diagram. It also includes acquiring the voltage and current values ​​of each node in the topology diagram of the power distribution network within a preset time period. Based on the voltage and current values ​​of each node in the topology diagram of the power distribution network within the preset time period, it acquires the fundamental voltage average value, h-th harmonic voltage average value, fundamental current average value, h-th harmonic current average value, fundamental apparent power, h-th harmonic active power, harmonic voltage distortion rate, and harmonic current distortion rate of each node in the topology diagram of the power distribution network within the preset time period. Finally, based on a harmonic source location model, it determines the node containing the h-th harmonic source from the at least one node in the topology diagram of the power distribution network.

The invention discloses a multimode fiber dynamic disturbance imaging reconstruction method based on a parallel neural network, and the method comprises the following steps: employing an LED as an illumination light source, and constructing a single-excitation wide-view-field multimode fiber (MMF) imaging system; under the condition that the disturbance range is 0-200 mm, image data of the output end of the multimode optical fiber are collected. By designing a parallel neural network structure, the network can perform efficient feature extraction and accurate image reconstruction on an optical fiber transmission image under dynamic disturbance, and particularly realizes high-fidelity image restoration under a small sample condition. The parallel neural network comprises a plurality of parallel sub-networks, each sub-network specially learns image mapping features under different disturbance conditions, and finally feature fusion is performed at an output end to obtain a stable image reconstruction result. According to the invention, the method has the remarkable advantages of high reconstruction precision, strong anti-disturbance capability and high training efficiency, and provides a novel and effective implementation way for high-fidelity imaging of the multimode optical fiber in a dynamic environment.

This invention relates to the field of battery management technology and discloses a method, apparatus, device, and storage medium for assessing the state of health (SOH) of a power battery. The method extracts health characteristics based on collected data from the power battery; these health characteristics include ohmic internal resistance and IC peak value; the ohmic internal resistance is temperature-corrected and converted into a relative rate of change of ohmic internal resistance; the IC peak value is temperature-corrected and converted into a value at a reference temperature; aging stages are defined based on changes in the power battery's health characteristics; and the battery's health status is assessed using corresponding health characteristics according to the aging stage of the power battery. The technical solution of this invention enables comprehensive, accurate, and online estimation of battery health status. By combining multiple health characteristics with aging stage identification, it extracts physically meaningful features from real collected data and dynamically adjusts the estimation strategy, significantly improving the adaptability and reliability of SOH estimation.

The application discloses a low-orbit satellite Doppler estimation demodulation method and equipment. It relates to high dynamic synchronization technology and is suitable for application in low-orbit satellite communication. The application takes a satellite beacon as a pilot signal, quickly locks the satellite beacon through a phase discrimination method, and extracts a current Doppler frequency shift; then, according to the beacon frequency and the carrier frequency of the symbol rate of the received signal, the Doppler frequency shift of the received signal is determined; finally, through frequency down-conversion, the low symbol rate signal is converted into a baseband signal, and then timing recovery, carrier recovery, demapping and the like are carried out, so as to complete demodulation. The application is suitable for high dynamic conditions of low-orbit satellites, has a large Doppler estimation range and high precision.

This invention provides a low-complexity TIADC time mismatch error calibration method, belonging to the fields of digital signal processing and high-speed, high-precision TIADC technology. It solves the most difficult problem in TIADC systems: estimating and calibrating time mismatch. The technical solution includes the following steps: S1: Converting a continuous external input analog signal into M channels of digital signals; S2: Combining them into a single signal y[n]; S3: Obtaining the calibrated output signals of each ADC channel; S4: Estimating the residual time mismatch error of each ADC channel; S5: Feeding the estimated time mismatch error signal back to the serial improved Taylor compensation calibration module as input. The beneficial effects of this invention are: when the 16-bit TIADC input signal frequency is within the entire Nyquist band, after third-order calibration, the average SFDR of the TIADC system is improved by 56.2 dB, and the average SNR is improved by 55.6 dB.

The application discloses a kind of multilayer composite antibacterial PE water supply pipeline and preparation process thereof, pipeline includes inner layer, outer layer and middle layer, inner layer is modified antibacterial inner layer, outer layer is ultraviolet resistant outer layer and middle layer is mechanical strengthening middle layer, prepare corresponding modified layer raw material according to proportion, after material preparation, material mixing, melting, co-extrusion, cutting, cutting, deburring and rest, etc., process steps, obtain a kind of multilayer composite antibacterial PE water supply pipeline.The beneficial effects of the application are: the inner layer of the antibacterial pipeline uses special PE material, which has excellent antibacterial performance after modification, can resist the growth and reproduction of various microorganisms for a long time, is not easily affected by water quality fluctuations and environment, the amount of material and antibacterial additive is harmless to human body and environment, environmentally friendly and sanitary, the pipeline has excellent corrosion resistance, mechanical strength and durability, the process is simple, and has strong practicality, suitable for mass production and engineering application.

The application provides a high-frequency transformer functional insulating material of plasmonic orientation boron nitride and a preparation method and application thereof, and relates to the technical field of insulating materials. The functional insulating material is obtained by sequentially covering, from an inner layer to an outer layer, a thermosetting resin matrix layer, a silicon-rich transition layer, an oriented boron nitride sheet layer, a boron nitride gradient insulating layer and a densified surface layer on the surface of a metal conductor. The insulating material can realize heat diffusion enhancement, electric field distribution homogenization and space charge inhibition, and exhibits high breakdown strength, high local discharge starting voltage and good long-term insulating stability under high-frequency non-sinusoidal voltage, and is suitable for insulating reinforcement of the winding end, the outgoing line end and the core clamping piece area of a high-frequency transformer of a super-speed train, and has a good application prospect.

The application provides an alcohol amine low-temperature cured high-temperature corrosion resistant protective paint and belongs to the field of high-temperature corrosion resistant protective paint. The high-temperature corrosion resistant protective paint is prepared from aluminum dihydrogen phosphate or chromium doped aluminum dihydrogen phosphate as a base resin binder, mixed aluminum powder with different morphologies and sizes as a functional filler, small molecular weight organic alcohol amine compounds as a low-temperature curing agent, deionized water as a solvent, and wetting dispersants, additives and the like. The corrosion resistant paint has good high-temperature resistance and can be used for a long time below 600 DEG C, the complete curing temperature is as low as 80 DEG C, and the cured coating has good adhesion, flexibility, boiling water resistance and aviation fuel immersion resistance, and can solve the problems of the current inorganic phosphate corrosion resistant coating, such as brittleness, poor compactness and high curing temperature, and can be applied to the field of low-temperature curing high-temperature corrosion resistant protection.

The invention discloses a compound water-based working solution for cleaning and passivating the inner wall of a stainless steel pipeline and a use method thereof. The working solution is prepared by compounding an organic acid complexing agent, a fluorine-containing inorganic acid dissolving agent, an oxidizing inorganic acid passivating agent, a nitrogen-containing heterocyclic metal corrosion inhibitor, an anionic surfactant and water. The use method comprises the following steps: carrying out alkaline pretreatment and flushing on the stainless steel pipeline system; the preheated working solution is pumped into a system to be circularly cleaned and passivated; and finally, neutralizing and finally washing. Through the synergistic effect of all the components, powerful rust removal and high-quality passivation are integrated into one step, three kinds of stubborn red rust can be thoroughly removed, meanwhile, a stainless steel substrate is effectively protected against over corrosion, the treated surface keeps the original silvery white luster and smoothness of metal, a compact passivation film is formed, the water quality of a system is recovered quickly, and the service life of the system is prolonged. The method is suitable for regeneration maintenance of old purified water systems.