1148results about How to "Easy to build" patented technology

The invention discloses a pig farm disease risk attribution method and system based on a knowledge graph. The method comprises the following steps: constructing a pig farm biosafety knowledge graph according to a pig industry biosafety application and a pig industry biosafety field knowledge base; secondly, inputting all pig farm events of the pig farm in N days, risks of the pig farm and risk probabilities; factors of pig farm diseases are searched through the pig farm biosafety knowledge map, and the disease text attribution of the pig farm is given according to constraints such as the contribution degree of pig farm problems. The pig farms with medium and high risks are rectified and predicted according to attributed risk items, and the pig farms with low risks or the pig farms without diseases after early warning can be summarized as excellent management experience. Through analysis and reasoning of the atlas, more logical analysis can be provided for pig farm risk attribution tasks, the pig farms are helped to deeply understand characteristics and prevention and control requirements of various diseases, and a scientific basis is provided for formulating targeted prevention and control strategies.

The invention discloses a multi-light-spot centroid extraction method and device based on an FPGA, a medium and a product, and relates to the field of digital image processing, and the method comprises the steps: firstly, caching image line data through a first-stage FIFO and a second-stage FIFO, forming three continuous groups of image line data streams, effectively solving the problems of data synchronization and processing rate matching, and improving the data processing efficiency; then, effective pixels of the light spots are accurately determined by means of a pixel threshold value, and different light spot areas are accurately divided by means of line continuity judgment and boundary marking, so that repeated recognition and error recognition of the light spots are avoided, and the accuracy of light spot recognition is greatly improved. And finally, according to the weighted average positions of the gray values of the effective pixels of all the light spots, the target centroid coordinates of the target light spots are calculated, the internal gray difference of the light spots is fully considered, and compared with a conventional method, the light spot energy distribution center is more accurately reflected, so that the calculation precision of the light spot centroid is remarkably improved.

The invention belongs to the technical field of energy storage, and particularly relates to a vertical circulation type gravity energy storage system based on a linear motor, the vertical circulation type gravity energy storage system comprises a circulation shaft, a carrying platform system and an energy storage system, the circulation shaft comprises a heavy object shaft, a no-load shaft and a horizontal channel, and a secondary switching disc is arranged at the joint of the heavy object shaft and the horizontal channel and the joint of the no-load shaft and the horizontal channel; the heavy well, the no-load well, the horizontal channel and the secondary switching disc are each provided with a secondary driving side, and each secondary driving side comprises a first rail set and a linear motor secondary; the platform deck system comprises a plurality of platform decks, the platform decks are used for bearing heavy objects, primary switching discs are arranged on the side faces of the platform decks, primary driving sides are arranged on the platform decks and the primary switching discs, and each primary driving side comprises a second track set and a linear motor primary; the energy storage system includes an upper storage bin, a lower storage bin, and a loading and unloading zone. The energy storage capacity expansion mode is simple, the expansion cost is low, the energy storage capacity configuration is flexible, and the energy storage efficiency is high.

The invention discloses a Mura defect detection method and device of a TFT-LCD display screen and electronic equipment, and relates to the field of display screens. The method comprises the following steps: acquiring an original image of a TFT-LCD display screen to be detected; preprocessing the original image to obtain a target image, the preprocessing including image noise reduction and image enhancement; based on the target image, constructing a multi-scale feature map of the Mura defect, the multi-scale feature map comprising a local mean map and a local variance map under multiple scales: performing adaptive weight fusion on the local mean map and the local variance map to obtain a confidence map of the Mura defect; according to the confidence map, utilizing morphological operation to extract a suspected defect area; performing shape analysis and contrast analysis on the suspected defect area to obtain shape features and contrast features of the suspected defect area; and screening out a target Mura defect region from the suspected defect region based on the shape feature and the contrast feature. By implementing the technical scheme provided by the invention, the accuracy of Mura defect detection is improved.

The invention discloses an unmanned vehicle exploration path planning method based on a multilayer fusion map. The method comprises the following steps: S1, constructing a multi-layer fusion map: constructing a multi-layer map through segmentation and layering of point cloud data, and superposing the multi-layer map to form the multi-layer fusion map; s2, generalized Voronoi diagram extraction: identifying a false free space in the fused map, incorporating the false free space into an obstacle, and constructing a generalized Voronoi diagram by calculating the distance between a point and the obstacle; and S3, path planning based on the Voronoi diagram: performing path planning based on the generalized Voronoi diagram by adopting a fast random exploration tree algorithm. According to the invention, efficient and autonomous exploration of the UGV in an unknown three-dimensional space can be realized. Through accurate map construction and intelligent path planning, the UGV can perform efficient navigation and exploration in an unknown environment, and meanwhile, the exploration area and efficiency are maximized. The method has an important practical value for rescue, exploration, monitoring and other applications in a complex environment.

The invention discloses a sliding bearing-rotor system stability test system and method under an impact load, and relates to the field of rotating machinery test in mechanical engineering. According to the technical scheme, different types of impact loads are applied through a vibration acceleration platform, and starting, stopping or external impact force in actual working conditions is simulated. In the testing process, a high-precision sensor and a multi-channel acquisition board card are used for monitoring the vibration characteristic and the rotating speed of the system in real time, it is guaranteed that signals of different positions and types can be synchronously acquired, and comprehensive system state information is provided. Then, in combination with time domain and frequency domain analysis technologies, key features are extracted from mass data by applying an advanced Fourier transform algorithm, the resonant frequency, modal characteristics and potential fault modes of the system are identified, and accurate evaluation of the stability of the system is realized. Experimental results show that the real-time monitoring and analysis method can effectively improve the stability test precision of the sliding bearing-rotor system under the impact load, and provides powerful technical support for engineering application. The method is used for evaluating the stability of the sliding bearing-rotor system under the impact load.

The invention discloses a harmonic oscillation suppression method and system for a hydrogen energy grid-connected converter. A corresponding remolding transfer function Gig (s) is added in a forward channel of a d-axis current controller; constructing a power transmission relation between an alternating current system and a direct current system based on the direct current side small signal model and the alternating current side power small signal model of the hydrogen energy inverter; inputting a small signal transfer function model of a voltage outer loop and a current inner loop obtained by controlling the hydrogen energy grid-connected inverter into a power transmission relation of an alternating current system and a direct current system to obtain a small signal control model of the hydrogen energy grid-connected inverter in a dq coordinate system; and determining an equivalent output admittance model of the hydrogen energy inverter based on the remolded transfer function Gig (s) and the small signal control model, obtaining a minimum return rate matrix representing the stability of the hydrogen energy grid-connected inverter through the power grid impedance and the output admittance of the hydrogen energy inverter, and determining the stability of the grid-connected converter system based on the characteristic value of the minimum return rate matrix. And suppression of harmonic oscillation is realized.

The invention relates to the technical field of semiconductors, in particular to a nanoscale silicon through hole and a preparation method thereof, and the method comprises the following steps: providing a semiconductor substrate; preparing a nano-scale groove on the surface of the semiconductor substrate by adopting a Bosch process; etching the side wall of the nanoscale groove by adopting an atomic layer etching process to form a smooth side wall; depositing a dielectric layer by adopting an atomic layer deposition process; depositing a barrier layer by adopting an atomic layer deposition process; and depositing a metal layer by adopting an atomic layer deposition process. According to the invention, a Bosch process is combined with an accurate and controllable atomic layer etching (ALE) technology and an atomic layer deposition (ALD) technology. The surface roughness of the side wall is reduced through the ALE technology, scale generated by the Bosch technology is eliminated, so that the smooth side wall is obtained, then the dielectric layer and the metal layer are completely filled through the ALD technology, and finally the back power supply network with excellent performance is constructed. According to the method, the problem of uniform filling of scale and nano-TSV (Through Silicon Via) caused by the Bosch process is effectively solved.

The invention relates to the technical field of scene supervision, in particular to an AI-based emergency rescue scene intelligent supervision system and method, and the system comprises a scene data collection module, a data feature analysis module, an intelligent decision support module and a rescue action execution module. According to the method, the dynamic change features in the rescue scene are accurately recognized by performing detailed color depth analysis, edge detection, waveform analysis and tone recognition on the collected images and audios, the recognition of key moment changes is more accurate through advanced data processing, and the construction of key morphological feature data is more comprehensive; through three-dimensional space mapping and analysis of time sequence information, accurate assessment of an accident range and rapid determination of resource demands can be realized, configuration and response time of rescue resources are greatly optimized, comprehensive application of technical means is realized, the rescue efficiency is remarkably improved, the risk of life and property loss is reduced, and the method is suitable for popularization and application. And the safety and the accuracy of rescue operation are improved.

The invention relates to a dynamic optimization system and method for an intelligent operation and maintenance path of a photovoltaic base station. Real-time data are accessed and processed by using a data integration platform; the electronic map building module is used for calling the existing map service, marking on the map and dynamically updating the detailed information of the base station in real time to generate an electronic map; acquiring system work order data and work order task priority data in real time by using a work order acquisition module; selecting a corresponding path planning strategy by using a path planning optimization module, and for a single task, calculating an optimal path by using an A * algorithm; for multiple tasks, a priority weighted summation method is used for sorting, and then a path is planned; for new tasks, dynamically adjusting the task sequence and performing path fine adjustment; and finally, displaying the operation and maintenance path in real time by using a visual navigation module and navigating. Through multi-source data fusion and an intelligent algorithm, operation and maintenance path planning is optimized, task scheduling and path planning are dynamically adjusted according to real-time conditions, and it is ensured that tasks are efficiently completed.

The invention discloses a network shooting range simulation method, device and equipment based on multiple parameters and a medium, and relates to the technical field of network security, and the method comprises the steps: analyzing each service protocol, generating fingerprint information based on an obtained feature rule, and storing the fingerprint information to a preset fingerprint database; variable parameters in the fingerprint information are configured through the unified configuration interface to obtain target service starting parameters, and different target drone services are simulated based on the target service starting parameters; receiving the request packet through the target drone, and analyzing the request packet based on a preset service protocol specification; and obtaining target fingerprint information from a preset fingerprint database based on an analysis result, and constructing a response packet by using the target fingerprint information and the target service starting parameter to complete a network target range simulation operation. Different target drone services are simulated through fingerprint information obtained by analyzing each service protocol and configuration of different variable parameters, a plurality of different service scenes can be quickly simulated, and the test efficiency is improved.

The invention relates to the technical field of wire and cable manufacturing, in particular to a fiber-reinforced fluoroplastic fire-fighting wire and cable and a preparation method thereof. The fiber-reinforced fluoroplastic fire-fighting wire and cable sequentially comprises a cable core, a shielding layer and an outer sheath layer from inside to outside, the outer sheath layer is prepared from the following raw materials in parts by weight: 40 to 45 parts of polytetrafluoroethylene, 35 to 40 parts of ethylene-vinyl acetate copolymer, 12 to 14 parts of composite flame retardant, 12 to 15 parts of modified zirconium oxide fiber, 25 to 30 parts of modified heat-conducting filler, 1.2 to 1.5 parts of coupling agent, 1 to 1.5 parts of antioxidant, 1 to 1.5 parts of lubricant and 2 to 2.5 parts of flexibilizer. The outer sheath layer of the fiber-reinforced fluoroplastic fire-fighting wire and cable prepared by the invention has excellent mechanical strength, toughness, heat-conducting property, high temperature resistance and flame retardant property, is suitable for fire-fighting power supply occasions, and is beneficial to rescue work of firefighters in emergency.

The invention relates to a method for driving impurity iron to enrich and purify aluminum alloy return scrap and a product, the aluminum alloy return scrap is placed in a crucible, is heated in a resistance furnace and is subjected to heat preservation for a period of time, so that the return scrap is fully molten, and a melt is obtained; continuously preserving the heat of the melt, connecting two parallel electrodes with a pulse power supply, vertically inserting the two parallel electrodes into the melt, and preheating for a period of time; setting a first pulse voltage, a first pulse current and a first pulse frequency according to the impurity iron content of the aluminum alloy return scrap; second pulse voltage, second pulse current and second pulse frequency are set according to different heat preservation temperatures during melt electric pulse treatment, and electric pulse treatment is applied to the melt for a period of time in the heat preservation stage; and closing the resistance furnace and the pulse power supply after treatment, and cooling the melt along with the furnace to obtain a sample. The method effectively solves the problem of malignant accumulation of impurity iron elements in the aluminum alloy resource recycling process. The method is short in treatment time and high in iron removal efficiency, and the production cost can be greatly reduced.

The invention discloses corynebacterium glutamicum for producing N-acetylglucosamine and application of the corynebacterium glutamicum, and belongs to the technical field of synthetic biology. Specifically, the corynebacterium glutamicum overexpresses a GNA1 gene from a brewer's yeast S288C controlled by a tacM promoter, a glmS gene from corynebacterium glutamicum S9114 and a yqab gene from escherichia coli K12 MG1655, and simultaneously has five gene defect types of nagA, nagB, ldhA, msccg and msccg2 in a genome and two gene single base mutation types of odhA and glnA, and the codon of the glnA for coding the 405th amino acid is mutated from TAC to TTC. By blocking excretion of glutamic acid of corynebacterium glutamicum and enhancing conversion of glutamic acid to glutamine, the supply capacity of a precursor of corynebacterium glutamicum is enhanced, and an optimal way for synthesizing N-acetylglucosamine is obtained, so that efficient production of N-acetylglucosamine in corynebacterium glutamicum is realized, and the yield of N-acetylglucosamine in corynebacterium glutamicum is increased. The method has important economic value and social significance.

The invention discloses a V-shaped mud cabin drag suction dredger pumping channel structure which comprises a connecting pipe, a mud cabin pumping channel and a bow square rotating circle, one end of the mud cabin pumping channel is connected with one end of the connecting pipe, and the other end of the mud cabin pumping channel is connected with a mud pipe of a bow through the bow square rotating circle. The top face of the mud cabin pumping channel is of a double-top structure, the inner wall of the double-top structure, the inner side face of the mud cabin pumping channel and the inner bottom face of the mud cabin pumping channel are all smooth faces, the bottom structure of the mud cabin pumping channel is of a longitudinal continuous structure, and the bottom structure of the mud cabin pumping channel separates a mud door hinge point and rubber and provides support above the rubber. The double-top structure comprises a double-top structure lower top plate and a double-top structure upper top plate located above the double-top structure lower top plate. The upper portion of the double-top structure lower top plate is fixedly connected with the double-top structure upper top plate through rib plates or reinforcing ribs. The structure is few in hard points, uniform in channel shape, small in resistance, simple in construction process, high in pumping efficiency, safe and reliable. No protruding structure exists in the mud cabin, and mud unloading is smooth.

The invention discloses a clay adhesive force measuring device of a shield cutter head under the action of multiple factors, and relates to the field of shield construction tunneling equipment, the clay adhesive force measuring device comprises a device body, an electroosmosis unit, a chemical improvement unit, a temperature control unit and an adhesive force measuring unit, the device body comprises a horizontal base plate and a device shell placed on the horizontal base plate, and the device shell is used for measuring the clay adhesive force of the shield cutter head; the electroosmosis unit is used for simulating the influence of a pulse signal current value on the adhesive force of cohesive soil; the chemical improvement unit is used for adding a chemical reagent into the cohesive soil to change the adhesion characteristic of the cohesive soil; the temperature control unit is used for controlling the temperature of the cohesive soil; and the adhesive force measuring unit is used for compacting the cohesive soil and measuring the adhesive force between the cohesive soil and the horizontal base plate. The device comprehensively considers a plurality of factors, such as pulse signals, voltage, temperature, chemical reagents and the like, which influence the clay viscosity, and breaks through the limitation of traditional single-factor judgment; the method has flexibility and diversity, and an innovative solution is provided for accurately measuring the adhesion force of the clay.

The invention discloses a cooling forming device for power cable production, and relates to the field of cable manufacturing, the cooling forming device comprises a water tank base, a water pump mounting seat, a circulating water pump, a cooling tank and a cooling tank, the water pump mounting seat and the cooling tank are fixedly mounted at the upper end of the water tank base, and the water pump mounting seat is located on one side of the cooling tank. According to the cooling forming device for power cable production, the device size is smaller, the single-motor driving structure is simple, meanwhile, the cable and water cooling forming time is guaranteed, pressure is applied to a cable through water pressure, the shell shrinkage effect of the cable is improved, expansion generated by thermal forming machining of the cable is reduced, and the service life of the cable is prolonged. The cooling efficiency of contact between water and the cable is improved, meanwhile, water can enter the water tank base more quickly to circulate, cable cooling is prevented from being affected by accumulated heat generated by insufficient water cooling, the annularly-arranged air injection holes can comprehensively inject air to remove water from the cable, and the problem that water spots are left after the cable is cooled is solved.

The invention provides a construction method of fingerprint spectrums of katsumadai medicinal material, standard decoction and formula granules thereof, which comprises the following steps: preparing a mixed reference solution from alpinetin, pinocembrin, cardamonin and alnudinone; preparing a test solution from the alpinia katsumadai medicinal material, the standard decoction or the formula granules; respectively detecting the reference solution and the test solution by adopting a high performance liquid chromatography, and constructing fingerprints of the alpinia katsumadai medicinal material, the standard decoction and the formula granules of the alpinia katsumadai medicinal material; wherein the conditions of the high performance liquid chromatography are as follows: a mixed solution of acetonitrile and methanol is taken as a mobile phase A, a phosphoric acid aqueous solution with the volume concentration of 0.08%-0.12% is taken as a mobile phase B, and a gradient elution procedure is adopted. The method has the advantages of being simple, stable and high in specificity, and a comprehensive, effective and rapid evaluation method is provided for quality control of alpinia katsumadai medicinal materials, standard decoction and formula granules of the alpinia katsumadai medicinal materials.

The invention relates to a Kuder optical path correction method based on laser emission. Firstly, a plane mirror 19 is used for calibrating the installation position of an auto-collimation observation mirror 2 on a laser emission fixing bin 1; replacing a plane mirror 19 with a standard pentaprism 5, and calibrating the arrangement position of the optical theodolite 4 by using the standard pentaprism 5; replacing the standard pentaprism 5 with a Kuder mirror I 11, and determining the mounting position of the Kuder mirror I 11 by using the auto-collimation observation mirror 2 and the optical theodolite 4; and finally, a servo stable rotary table azimuth frame 10 and a servo stable rotary table pitching frame 7 are sequentially mounted on the laser emission fixing bin 1, and an azimuth axis and a pitching axis of the Kuder optical path are respectively corrected by using a laser 8 and a front lens 6. The method has the advantages of simplicity in operation, high correction efficiency, high field adaptability, convenience in equipment disassembly and assembly and the like, the Kuder optical path can be simply and quickly corrected, the optical path deviation is effectively eliminated, and the accuracy and the reliability of optical measurement are improved.

The present invention provides an anthracite-based nitrogen-doped carbon material and a preparation method and application thereof. The following steps are included: a. The crushed and screened anthracite and graphite phase carbon nitride are mixed uniformly by mechanical ball milling in a mass ratio of (5-1): 1 to obtain a mixture; b. The mixture is placed in a vacuum tube furnace, heated to 400-700°C in an argon atmosphere, and pyrolysis pretreatment is performed to obtain a pretreated mixture; c. After the pretreated mixture is cooled to room temperature, it is heated to 1000-1400°C in an argon atmosphere, and high-temperature carbonization is performed to obtain anthracite-based nitrogen-doped carbon material. The carbon material prepared by the present invention has low cost, easy raw materials, strong conductivity, stable structure, and can effectively improve the electrochemical performance of sodium ion batteries. At the same time, the present invention also provides a sodium ion battery based on anthracite-based nitrogen-doped carbon material as a negative electrode material, which exhibits a higher reversible specific capacity and superior cycle performance and rate performance.

The invention belongs to the field of network data transmission, and provides a network data transmission system and method for star flash distributed networking. The network data transmission system of the star flash distributed networking comprises a terminal, an early warning device, a server side and a total server, the terminal, the early warning device, the server side and the total server are embedded with satellite flash radio frequency modules; the server side and the total server are servers and are provided with wireless network devices with satellite flash to network ports, so that a satellite flash radio frequency interface is converted into a network port interface; the terminal, the early warning device, the server side and the total service side are all embedded into a TCP / IP protocol stack so as to be used for establishing a SOCKET and processing SOCKET data, so that the whole network performs data interaction through a TCP / IP protocol, and data acquisition, control and emergency alarm in a local area network are realized.

The invention discloses a standby power supply control protection circuit based on an acquisition terminal and the acquisition terminal. The control protection circuit is used for performing switching protection control on a standby power supply of an electricity utilization information acquisition terminal, and comprises a monitoring sub-circuit for monitoring the standby power supply and sending voltages of a super capacitor and a rechargeable battery to a control sub-circuit; the control sub-circuit controls the super-capacitor or the rechargeable battery to supply power to the electricity utilization information acquisition terminal according to the voltage of the super-capacitor and the rechargeable battery, and controls the super-capacitor to supply power to the electricity utilization information acquisition terminal when the voltage of the super-capacitor is higher than a first threshold value; and when the voltage of the super capacitor is lower than a second threshold value and the voltage of the rechargeable battery is higher than a third threshold value, controlling the rechargeable battery to supply power to the power utilization information acquisition terminal. According to the technical scheme provided by the embodiment of the invention, the reliability of the standby power supply switching circuit of the electricity utilization information acquisition terminal is improved.

The invention relates to the technical field of battery management, in particular to a lithium battery remaining life prediction method and device, terminal equipment and a storage medium, and the method comprises the steps: determining the working parameters and environmental parameters of a target battery and the cell type of the target battery; determining a corresponding pre-constructed life prediction model according to the type of the battery cell; the life prediction model is constructed according to the working parameters and the environmental parameters; and determining the current cycle charging and discharging times of the target battery, and obtaining the residual life of the target battery according to the life prediction model, the cycle charging and discharging times, the environmental parameters and the working parameters. Therefore, more relevant factors are considered in the life prediction of the lithium battery, the prediction result is more accurate, and the prediction process is more convenient.

The invention discloses an assembly adjustable tunnel excavation supporting protection mechanism, relates to the technical field of tunnel supporting structures, and solves the problems that a supporting plate for protecting a tunnel needs to bear very large downward pressure, the supporting plate is easily damaged and even fractured during protection, and the protection capability is affected. The assembled adjustable tunnel excavation supporting mechanism comprises a tunnel body, a supporting bottom plate, a vertical lifting mechanism and an adjustable excavation supporting mechanism, and the supporting bottom plate is installed at the inner bottom of the tunnel body. According to the supporting structure, it is guaranteed that the side supporting plates and the supporting plates assembled on the side faces of the side supporting plates can tightly abut against the inner wall of the tunnel, gaps and other problems cannot be generated, the supporting contact area of the tunnel is increased, and meanwhile the supporting bearing capacity of the inner wall of the tunnel can be guaranteed. And meanwhile, the side supporting plates, the sliding rods arranged at the bottoms of the side supporting plates, the external columns and the upper supporting plate can form triangles, it is guaranteed that the problems of breakage and the like cannot occur when the tunnel is supported, and safety is higher.

The invention belongs to the technical field of analysis and detection, and relates to an analysis method and an analysis system of ethylene glycol by-product mixed alcohol, the analysis method comprises the following steps: S1, preparing a corresponding reference solution and a standard mixed alcohol solution according to a to-be-analyzed component in the ethylene glycol by-product mixed alcohol; s2, for the reference substance solution and the standard mixed alcohol solution, constructing a standard curve model corresponding to each component through gas chromatography; s3, collecting by-products in ethylene glycol production in real time, and filtering; according to the method, peak areas corresponding to components to be analyzed in the mixed alcohol sample are obtained and then substituted into respective standard curve models respectively, and the content of the components to be analyzed in the mixed alcohol sample is obtained. According to the method, the standard curve model is constructed, and the mixed alcohol is pretreated, so that the content of multiple components in the mixed alcohol is analyzed and detected, the analysis time is shortened, the analysis cost is reduced, and the analysis accuracy and sensitivity are improved.

The invention relates to the technical field of ocean engineering and electric power engineering, and discloses an assembly type fan jacket and a construction method thereof.A first supporting node and a second supporting node are connected, connection between pipe bodies is achieved, and solidification media are poured into the first supporting node and / or the second supporting node, so that the pipe bodies are connected. After the curing medium is cured, the bearing capacity of each supporting node of the jacket is improved, premature yield and deformation of each supporting node can be delayed or even inhibited, the phenomenon of plastic deformation under the action of external force is avoided, and the supporting performance of each supporting node can be better exerted.

The invention relates to a method for quantitatively monitoring the pollution degree of groundwater. The method comprises the steps of near-infrared hyperspectral imaging, construction of a prediction model and fitting of a prediction function. The invention further provides a groundwater analysis system and application of the method. According to the method, a hyperspectral imaging technology is adopted to shoot a mixed sample of organic pollutants and water, key features of a sample image are obtained by combining an image preprocessing technology and a feature extraction technology, the sample features with remarkable performance are used as training data, and a machine learning algorithm is applied to obtain training data; the model can accurately predict the water-oil volume ratio in a sample, and meanwhile, provides spatial distribution of the organic pollutants in the environment, so that an efficient and innovative solution is provided for quantitative analysis of the organic pollutants.

The invention discloses a chiral 2-azabicyclo [3.1. 1] heptane derivative and a synthesis method of the chiral 2-azabicyclo [3.1. 1] heptane derivative. According to the method, bicyclo [1.1. 0] butane is taken as a raw material and is subjected to a cycloaddition reaction with N-allyl carbonate under the catalysis of Lewis acid and a chiral iridium complex, a series of chiral 2-azabicyclo [3.1. 1] heptane compounds with various structures are synthesized with excellent chemical selectivity, and the product can be further derivatized. The method has the advantages of easily available raw materials, simple operation, mild reaction conditions, and diversity of functional groups.

The invention discloses a high-precision carving machine motion control method based on Z-axis control, particularly relates to the field of high-precision carving machine motion control, solves the problems of carving precision and thermal management, and obtains a three-dimensional height model of a to-be-carved material and vibration and abrasion data in the carving process through high-resolution laser scanning and real-time monitoring. A relation model of image data and lettering parameters is constructed by utilizing a machine learning algorithm, and the adaptation degree of parameter combination is comprehensively evaluated in combination with a lettering surface roughness coefficient and a heat accumulation factor, so that intelligent and fine control of the lettering process is realized; the screened optimal parameter combination can ensure the smoothness and flatness of the lettering surface, effectively manage heat, reduce material deformation and tool abrasion, prolong the service life of tools, improve the production efficiency and product consistency, reduce unnecessary adjustment and rework, and remarkably improve the precision and stability of the lettering process.

The invention relates to the technical field of sodium / lithium ion battery negative electrode materials, and discloses a molybdenum-based negative electrode material and a preparation method and application thereof.The molybdenum-based negative electrode material comprises a nitrogen and sulfur co-doped carbon nano short rod, and the carbon nano short rod is filled with a core-shell type molybdenum-based nano roll; the core-shell type molybdenum-based nano roll comprises a molybdenum dioxide core and a molybdenum disulfide shell layer with a bent structure, and the number of the molybdenum disulfide layers is 12-35. The molybdenum-based negative electrode material provided by the invention is composed of a carbon nano short rod coating layer and a core-shell type MoO2-MoS2 nano roll filled in the carbon nano short rod coating layer; the MoO2-MoS2 nano-roll is obtained by homologous conversion of MoO3 nano short rods and has unique core-shell structure characteristics, and the MoO2-MoS2 nano-roll and the MoO3 nano short rods form a large number of heterogeneous interfaces to provide abundant reaction active sites for storing sodium ions or lithium ions and accelerating electrochemical reaction kinetics; according to the present invention, the MoS2 shell layer has the bending structure characteristic, and the number of the MoS2 layers is controlled to 12-35 through the confinement pyrolysis temperature and the sulfur-containing initiator consumption so as to obtain the excellent sodium / lithium storage performance, and the excellent rate performance and the excellent cycle stability are provided when the MoS2 / lithium battery is used;