16results about How to "Strong industrial application value" patented technology

The invention discloses a method for preparing diester terephthalate by catalyzing polyethylene glycol terephthalate (PET) to depolymerize. The method comprises the following steps: treating PET or a composite system thereof in diester carbonate under the conditions of no catalyst or taking a salt substance as a catalyst to realize chemical depolymerization of PET, so as to obtain PET monomers of diester terephthalate and ethylene carbonate, and realize complete depolymerization of PET in a composite. According to the method disclosed by the invention, through the reaction of the diester carbonate and the PET, the depolymerization of the PET under a mild condition can be realized, and the related technology research and development of chemical recovery of the PET monomer in a PET composite system or a mixed system are further carried out. The method provided by the invention has the advantages of high efficiency, greenness, mild reaction conditions and the like, can catalyze PET depolymerization to generate the monomer terephthalic acid diester, and has higher industrial application value.

The invention discloses a reflective heat-insulation water-based polyurea coating and a preparation method thereof. The reflective heat-insulation water-based polyurea coating is prepared from the following components: modified water-based polyurea resin, deionized water, a wetting dispersant, a defoaming agent, a reflective filler, a heat-insulation filler, a coalescing agent, an anti-flash-rust agent, a flatting agent and a thickening agent. The reflective filler is zinc titanate; the modified water-based polyurea resin is obtained by grafting hollow polystyrene-b-polyacrylamide microspheres on water-based polyurea resin; the hollow polystyrene-b-polyacrylamide microsphere is prepared by the following steps: firstly, preparing a prepolymer by adopting an emulsion polymerization method, then preparing a core-shell microsphere which takes the prepolymer as an inner shell and polystyrene-b-polyacrylamide as an outer shell by adopting a seed emulsion polymerization method, and finally, removing an inner core in the core-shell microsphere by adopting an alkali swelling method. The reflective heat-insulation water-based polyurea coating disclosed by the invention has excellent heat insulation performance and can be widely applied to the field of building heat insulation.

The invention belongs to the technical field of phase change energy storage, and particularly relates to a phase change heat storage device based on bidirectional staggered fins and application, the phase change heat storage device comprises a cylindrical shell, a finned tube and a phase change material, and the finned tube comprises a circular base tube and a plurality of fins welded to the surface of the base tube; each fin comprises a main fin connected to the outer surface of the base tube and extending in the length direction and a branch fin set connected to the top of the main fin, the first branch fin and the second branch fin are the same in height and width, and each first branch fin and the corresponding second branch fin are adjacent and opposite in bending direction. The branch fins I and the branch fins II at the top of each main fin are alternately arranged in sequence; the multiple fins are evenly distributed in the heat storage cavity on the periphery of the base tube in a radial shape, the heat storage cavity is filled with the phase change materials, the finned tube is wrapped with the phase change materials, and on the basis of conventional rectangular fins, the heat storage rate and the heat storage efficiency are remarkably improved through the simple machining procedures of segmentation and bending.

The invention discloses an energy technology intelligent operation and maintenance management method based on the low-altitude field, and relates to the technical field of energy technology operation and maintenance, and the method specifically comprises the following steps: analyzing the obtained operation state information of each region of a fan blade, and respectively generating a turbulence stress intensity coefficient and an instantaneous load impact coefficient of each region; and constructing a turbulent flow influence evaluation model for the generated turbulent flow stress intensity coefficient and instantaneous load impact coefficient of each region, generating a load impact coefficient of each region, performing analysis after generation, and evaluating the instantaneous load impact degree of the turbulent flow on the fan blade. According to an evaluation result, the impact is divided into three types of low load impact, medium load impact and high load impact; and respectively taking corresponding measures according to a division result. According to the method, the problem of evaluating the instantaneous load impact of the turbulent flow on the fan blade is solved, and real-time optimization and safe and efficient operation of fan operation are realized.

The invention belongs to the technical field of phase change energy storage, and particularly relates to a cascade phase change heat storage device which comprises an inlet, an outlet and a heat storage device body. The heat storage device body is composed of a shell, a plurality of finned tubes and a phase change material. The finned tube comprises a circular base tube and two-way staggered fins; layering partition plates are arranged in the heat storage device, and the phase change material filling area is divided into an upper area, a middle area and a lower area according to the height. Due to the fact that hot fluid flows in from the upper portion of the heat storage device, exchanges heat with the phase-change materials and then flows out from the lower outlet, the upper area is filled with the high-temperature phase-change materials, the middle area is filled with the medium-temperature phase-change materials, and the lower area is filled with the low-temperature phase-change materials. When flowing through the heat storage device from top to bottom, the hot fluid always keeps relatively stable temperature difference with the phase change materials in different areas, a large amount of heat energy can be stored in a small size, and therefore the heat efficiency of the heat storage system is improved.

The invention belongs to the technical field of water treatment, and particularly discloses a preparation method and application of an adjustable double-charge polyamide nanofiltration membrane. According to the preparation method of the adjustable double-charge polyamide nanofiltration membrane, a high negative electricity polyamide layer is prepared through a diamine buffer salt / inorganic salt aqueous phase solution and oil phase interfacial polymerization reaction, and a positive electricity polyamide layer is prepared through a polyamine inorganic salt aqueous phase solution and oil phase interfacial polymerization reaction; the charge capacity, the pore diameter, the thickness and the uniformity of the positive electricity layer and the negative electricity layer can be adjusted. The adjustable double-charge polyamide nanofiltration membrane can be applied to the fields of sewage treatment, lithium extraction from salt lakes and the like.

The invention relates to the technical field of automobile seats, and provides an automobile seat partition rapid temperature control and fatigue awakening device and method. The device sequentially comprises a coating layer, a flexible soaking layer, a thermoelectric module array, a micro-channel liquid cooling plate, a heat insulation supporting layer, a sponge substrate, a pressure sensor array, a temperature sensor array, a control unit, a liquid cooling circulating pump and an air conditioner heat exchanger. The thermoelectric module array at least comprises two semiconductor thermoelectric modules which are respectively arranged in the cushion area and the neck area; the control unit controls the corresponding semiconductor thermoelectric module and the liquid cooling circulating pump to perform top-speed heating or top-speed cooling; and when a fatigue state signal of the vehicle-mounted DMS system is received, the semiconductor thermoelectric module at the neck is controlled to output high-frequency pulse current so as to generate rapid temperature difference jump. The thermoelectric module is coupled with an air conditioner liquid cooling loop through the micro-channel liquid cooling plate, the heat dissipation bottleneck of a traditional semiconductor seat is solved, and dynamic temperature control of each partition is achieved by generating a body pressure cloud picture.

The invention belongs to the technical field of catalytic conversion of natural gas, and particularly relates to a method for synthesizing methanol by continuously oxidizing methane through photo-thermal catalysis, which comprises the following steps: by taking a ZnO-loaded transition metal oxide as a catalyst and oxygen as an oxidant, continuously and efficiently oxidizing methane to synthesize methanol under normal pressure in cooperation with light energy and heat energy, the method comprises the following specific steps: step 1, loading a catalyst into a fixed bed reactor, introducing nitrogen under a normal pressure condition, and carrying out programmed heating to a reaction temperature; and 2, after the reaction temperature is stable, closing the nitrogen, introducing reaction gases CH4, O2 and H2O (g), and turning on the light source for reaction. According to the method, the methanol is synthesized by continuously and efficiently oxidizing methane under the normal-pressure condition through cooperation of light energy and heat energy, the technological process is simple, the method is suitable for continuous operation, and the catalyst is low in preparation cost, excellent in catalytic performance, high in methanol selectivity and high in industrial application value; the reaction is carried out under the normal pressure condition, so that the safety problem caused by high-pressure reaction is avoided.

This application belongs to the field of laser strengthening, and specifically discloses a method for determining the laser surface hardening effect and the depth of the hardened layer of a ductile iron mold. The hardening effect determination method is: perform a phase composition analysis on the surface of the strengthened ductile iron mold. If, except for graphite, the proportion of martensite in other phases is more than 95%, and the proportion of residual austenite is less than 5%, then it is determined that the surface hardening effect of the ductile iron mold meets the requirements. This application proposes to use the surface phase composition as an evaluation index for the hardening effect, and optimizes the specific evaluation criteria, which can effectively simplify the evaluation process of the surface hardening effect of the ductile iron mold, timely feedback and optimize the process design, and has the advantages of a simple determination process and accurate determination results, and has strong industrial application value.

The invention discloses a five-axis forming grinding error compensation method for a parabola short-section tooth profile of a harmonic reducer, and particularly relates to the technical field of harmonic reducer manufacturing, which comprises the following steps: S1, constructing a multi-source error coupling model including a machine tool kinematics error, a thermal-mechanical coupling error and the like to obtain a total error transfer formula; s2, various kinds of error related data in the grinding process are collected in real time through a multi-sensor array; s3, a tool path is adjusted based on the tooth profile curvature change rate, and tool interference is avoided through an interference pre-judgment algorithm; and S4, fusing data by adopting Kalman filtering to realize closed-loop compensation control. According to the method, the problems of multi-source error superposition, single compensation and easy interference in the prior art are solved, the tooth profile precision is stably controlled within 3 microns, the machining efficiency and stability are improved, existing equipment does not need to be transformed, the implementation difficulty is low, compatibility is high, industrial popularization is facilitated, and the method is suitable for tooth profile grinding machining of the harmonic reducer for the industrial robot joint.

The application provides a 700MPa high-strength hot-rolled steel, a preparation method and application, the chemical components of the 700MPa high-strength hot-rolled steel include the following in mass fraction: C 0.06~0.09%, Si 0.05~0.15%, Mn 1.8~2.0%, Ti 0.11~0.145%, Cr 0.1~0.2%, Nb 0.04~0.05%, V 0.01~0.02%, P≤0.015%, S≤0.002%, N≤0.005% and the balance of Fe and inevitable impurity elements; the thickness of the 700MPa high-strength hot-rolled steel is 8.99~13.99mm. The preparation method is simple, convenient to operate, does not need to add special equipment, can be adapted to the existing hot-rolling production line, is convenient for large-scale production and has strong industrial application value.

A method for extracting triples from knowledge graphs in the mining industry based on ontology constraints and thought chain principles is proposed. The method constructs a highly complete mining domain ontology, acquires and preprocesses unstructured text data sources from the mining domain, and then constructs structured prompts containing ontology constraint information and thought chain reasoning instructions, transforming the triple extraction task into a constrained generative reasoning process. The structured prompts are input into a generative large language model. After receiving the input, the model, relying on its self-attention mechanism and pre-trained knowledge, strictly follows the pre-defined thought chain paths in the structured prompts to conduct reasoning. The output of the generative large language model is parsed using a parsing algorithm, separating the thought chain part and the final result part of the model output. Triple data structures are extracted from the final result part to form a candidate triple list, followed by ontology-based post-processing verification and optimization. This method enables efficient, accurate, and standardized extraction of knowledge in the mining domain.

The embodiment of the invention provides a lithium battery positive and negative pole piece measurement method and system based on X-ray image analysis. The method comprises the following steps: extracting a region of interest containing a positive and negative pole piece layer structure from an original X-ray image of a lithium battery; performing image segmentation on the region of interest to obtain a binary image; performing linear edge detection on the binary image by adopting an expansion difference method so as to enhance the edge gradient in the vertical direction and detect the edge with unobvious gradient caused by multi-layer superposition; linear position information is extracted based on an edge detection result, and the actual distance between the positive and negative pole pieces is calculated by combining the pixel and actual size correspondence. According to the method, the detection efficiency is effectively improved by automatically extracting the region of interest, the problem of multilayer structure edge detection is solved by using an expanded difference method, distance measurement is realized by combining precise coordinate conversion, the detection precision and reliability are improved, automatic high-precision measurement of the distance between the positive pole piece and the negative pole piece of the lithium battery is realized, and the detection efficiency is improved. And an effective technical means is provided for lithium battery production quality detection.

The present application belongs to the technical field of three-dimensional phenotype detection, and particularly relates to a full-automatic acquisition and extraction method for three-dimensional phenotypes of corn. The method comprises the following steps: S1: constructing a complete dense three-dimensional point cloud containing a corn plant to be detected and a calibration object based on multi-view image video; S2: inputting the complete dense three-dimensional point cloud into a pre-trained PointNet++ model to obtain a corn plant point cloud to be detected; S3: processing the corn plant point cloud to be detected based on an adaptive Laplace algorithm to obtain a skeleton point cloud of the corn plant to be detected; S4: performing automatic topological analysis on the skeleton point cloud to complete decoupling of stem skeletons and leaf skeletons; S5: based on the decoupled stem skeletons and leaf skeletons, realizing organ-level point cloud segmentation of stems and leaves through constraint inflation operation; and S6: generating a corn phenotype detection standardized report in a unified format. The present application realizes full-automatic extraction of three-dimensional phenotype data of corn.

The invention discloses a method for preparing a 1, 4-dioxane compound by degrading polyethylene glycol, and belongs to the technical field of chemical catalytic degradation. According to the invention, the ionic liquid is used as a catalyst and can form a dihydrogen bond with ether group O and hydroxyl group H of a polyethylene glycol compound, so that polyethylene glycol is degraded. According to the degradation process disclosed by the invention, high-efficiency conversion under a mild condition is realized without participation of a metal catalyst, the reaction process is simplified, and generation of byproducts is effectively avoided; by virtue of the non-volatile characteristic of the ionic liquid, the risk of environmental pollution in the reaction process is reduced; meanwhile, the designability of the ionic liquid provides a space for optimizing the catalytic performance, and the reusability of the ionic liquid further improves the economical efficiency and environmental protection benefits of the ionic liquid. The method for degrading and preparing the 1, 4-dioxane compound has the advantages of no organic solvent, no metal participation, mild conditions, high conversion efficiency, no by-product and simplicity in separation, and has very high industrial application value.

The invention discloses a method for preparing tetrahydrofuran by degrading poly (butylene succinate) in subcritical water, which comprises the following steps: by taking poly (butylene succinate) as a raw material and deionized water as a solvent, mixing the poly (butylene succinate) and the deionized water, putting the mixture into a reactor, heating to a subcritical state, and carrying out hydrolysis reaction on the poly (butylene succinate) to generate tetrahydrofuran. The method provided by the invention has the advantages of high efficiency, greenness, mild reaction conditions and the like, can hydrolyze the poly (butylene succinate) to generate tetrahydrofuran and recycle the waste polymer, and has higher industrial application value.