13results about How to "Fill technology gaps" patented technology

The invention discloses a high-toughness flame-retardant cable protection tube and a preparation method thereof, and the preparation method comprises the following steps: S1, carrying out melt blending and dynamic vulcanization reaction on a mixture containing bimodal distribution high-density polyethylene, a polyolefin elastomer with a double long branch chain structure and a dynamic cross-linking agent at a first temperature interval and first shear strength, a pre-crosslinked base material is obtained; s2, cooling the pre-crosslinked base material to an interface anchoring temperature interval, adding the composite fiber system, and carrying out first-stage melt blending under medium shear strength; s3, heating the mixture obtained in the step S2 to a second temperature interval, increasing the temperature to second shear strength, carrying out second-stage high-shear melt blending, and adding a halogen-free intumescent flame-retardant system and a multi-walled carbon nanotube at the same time; and S4, orientation locking and gradient forming. The polyolefin elastomer with a double-long-branch-chain structure is introduced, and a step-by-step process is adopted, so that the low-temperature impact strength, the toughness and the flame-retardant grade of the material can be remarkably improved.

The application discloses a kind of cultivation of smell and headspace analysis combination's odd nan hand string nondestructive identification method, it is related to precious timber true and false identification and quality detection technical field, including following step A: sample pool data model establishment: a1, sample selection: collect the cultivation of different producing areas, gram weight, shape and size odd nan hand string genuine sample not less than 200;Collect by high pressure injection paste, press oil, bubble medicine, high throwing, immersion paste smearing and non-lignum aquilariae imitated fake sample not less than 200;A2, electronic nose data acquisition: using electronic nose to the sample carries out smell data acquisition, acquisition condition includes;By being provided with electronic nose data acquisition and key sensor screening, the whole identification process does not need to be destructively treated to sample any cutting, grinding etc., completely maintain the integrity and value of hand string, and electronic nose detection can be completed within 1 hour, headspace mass spectrum analysis as supplementary means can be completed within 3 hours, improve detection efficiency.

The invention relates to a hafnium zirconium oxide all-component ferroelectric characteristic and fatigue optimization method based on machine learning potential. The construction method comprises the following steps: step 1, acquiring atomic configuration, energy, stress and electric dipole moment data of HfxZr1-xO2 under different components x (0 < = x < = 1) as an original data set; 2, training a multi-task machine learning potential model by using a deep learning algorithm, wherein the model comprises an energy-force prediction branch and an electric dipole moment prediction branch; 3, performing molecular dynamics evolution under different temperatures and external electric fields to obtain a change curve of the polarization intensity along with the cycle period; and step 4, screening an optimal material component according to the nonlinear corresponding relationship between the fatigue rate and the Hf content obtained by simulation. Compared with the prior art, the method has the advantages that the training data set covering all-component space is constructed, the machine learning potential model capable of synchronously describing energy, force and electric dipole moment is obtained through deep neural network training, and the regulation rule of the Hf doping proportion on the crystal phase stability is disclosed through large-scale molecular dynamics simulation; and the relationship between the domain wall movement rate and the fatigue rate is quantified, and theoretical guidance of atomic scale is provided for component design of the FeRAM device.

This invention provides a method for cleaning ultra-deepwater long-distance gas-liquid mixed transport subsea pipelines, belonging to the field of marine oil and gas engineering and flow safety assurance technology. The method includes the following steps: accurate data analysis and operational condition simulation; calculation of the minimum ethylene glycol injection volume required for each stage; prediction of the maximum slug flow rate and its impact on the platform separator and trap; determination of the specific duration, gas volume control range, and gas source switching node for each cleaning stage based on the simulation results, while developing an emergency plan; sequential execution of the four stages: production gas carrying liquid stage, recirculating gas purging and carrying liquid stage, recirculating gas cleaning stage, and production gas cleaning stage; and depressurization via a balancing valve, removal of the cleaning tool, and product analysis. This invention achieves controllable risks, reduced time, and minimized production loss in pipeline cleaning operations through a multi-stage gas source switching strategy, integrated real-time online simulation and early warning technology, and optimized slug flow control and ball launch / receiver procedures.

The invention discloses a method and a system for inverting global sea level change based on satellite gravity data, and belongs to the field of geophysical monitoring and remote sensing. The method comprises the following steps: acquiring satellite gravity data and multi-source auxiliary data, calculating time-varying characteristics of a gravity field after preprocessing, and constructing an inversion model coupling land mass change and ocean thermal expansion; and finally outputting high-resolution global sea level change data by combining a machine learning and data fusion technology optimization result. According to the method, the problems of insufficient precision and low resolution of a traditional method are solved, the sea level change monitoring accuracy can be effectively improved, and key data support is provided for climate change research and disaster prevention and reduction.

This invention discloses a goal-oriented method for the targeted cultivation of selenium-enriched shiitake mushrooms, belonging to the technical field of edible fungi cultivation and functional foods. The method includes the following steps: adding exogenous selenium to the cultivation substrate during the fruiting body cultivation stage of shiitake mushrooms; the exogenous selenium is selected from nano-selenium or sodium selenite; different selenium sources are selected according to the target selenium enrichment requirements: (a) when the goal is to increase the yield of shiitake mushroom fruiting bodies, nano-selenium is selected; (b) when the goal is to increase the total selenium content or bioavailability of selenium in shiitake mushroom fruiting bodies, sodium selenite is selected. This invention provides clear selenium source selection schemes for three different commercial needs: "high yield," "high selenium," and "high absorption," filling a technological gap in the shiitake mushroom field. Producers can flexibly choose according to market demand, realizing precise and customized production of selenium-enriched shiitake mushrooms.

The invention relates to the technical field of microorganisms, and particularly discloses lysinibacillus fusiformis KBD-5 for antagonizing botrytis cinerea and application of the lysinibacillus fusiformis KBD-5. The preservation number of the strain is CGMCC (China General Microbiological Culture Collection Center) Whole genome (accession number PRJNA1335659) sequencing reveals that the strain has a triple synergistic antagonistic mechanism for the first time: the strain contains a fengycin-like lipopeptide synthetic gene cluster to destroy pathogenic bacteria cell membranes, and contains GH18 chitinase and GH5 cellulase genes to degrade pathogenic bacteria cell walls. The inhibition rate of the strain on botrytis cinerea reaches 76.42%; the tomato fruit test morbidity is reduced to 25.9%, and the rotting index is reduced by 75.0%; the control effect of greenhouse potting reaches 72.35%, and the control effect is not obviously different from that of procymidone. Biological safety assessment shows that no toxicity factor exists, and no drug-resistant gene horizontal transfer risk exists. The invention further provides a microbial preparation containing the KBD-5 and application of the microbial preparation.

The application discloses a seed fertilizer package for promoting growth of oats seeds suitable for weak alkaline low-fertility soil and belongs to the field of fertilizers, which comprises sorbitol liquid, potassium fulvate powder, carbon-based fertilizer, oat seeds and Trichoderma harzianum. The potassium fulvate powder, the carbon-based fertilizer and the sorbitol liquid are stirred to form a uniform viscous matrix mixture, a PVA film is cut into a film piece, and the oat seeds and the viscous matrix mixture are sealed by a heat sealing process to obtain the fertilizer package. The sorbitol liquid-potassium fulvate-carbon-based fertilizer-Trichoderma harzianum four-element system is applied to the oat seed fertilizer package for the first time, slowly dissolving and releasing functional components with soil water after sowing, forming a stable micro-ecological environment around the oat seeds, and simultaneously realizing multiple functions of moisture retention, acid regulation, fertilizer supply and growth promotion, effectively solving the core pain points of oat seed germination and seedling growth in weak alkaline soil, and filling the technical blank of the oat seed fertilizer package for weak alkaline low-fertility soil.

The application discloses a molecular marker primer for a narrow cod and application thereof, and relates to the technical field of molecular biology markers. The primer combination is composed of three pairs of primers, namely, GC6:TC14, GC8:GT15 and GC9:TG9, and the sequences of the primers are shown as SEQ ID NO. 1-6. The application develops, for the first time, the STR molecular marker primer combination specially used for sea area source identification of the narrow cod. Compared with the microsatellite marker used only for the population genetics basic research of the narrow cod in the prior art, the primer combination is optimized through multi-stage screening, can effectively distinguish the narrow cod samples from the Okhotsk Sea FAO 61 sea area and the Bering Sea FAO 67 sea area, and fills the technical blank in the sea area tracing field of the cross-border trade of the narrow cod.

The invention provides an electronic-grade vitamin C trace iron ion directional capture and multistage membrane composite purification system and method, and relates to the technical field of semiconductor high-purity reagent preparation.The method comprises the steps that firstly, a heterogeneous composite membrane system based on a conductive polymer is constructed, and a positive polarization gradient is formed on a membrane interface through a potential trap model; the reduction effect of vitamin C on iron ions is inhibited by utilizing an electronic shielding effect, and the problem of capture failure caused by unstable valence state of impurities under a strong reduction matrix is solved; then, an acoustic flow field enhanced mass transfer mechanism is introduced, mass transfer boundary layer resistance under ppb-level concentration is broken through micro vortexes generated by high-frequency acoustic microflow, and active directional impacting and capturing of trace impurities are achieved; and finally, irreversible locking is carried out based on orbital hybridization in a nanometer confinement range, system self-adaptive adjustment is achieved in cooperation with a PID acoustoelectric coupling compensation algorithm, the limitation of traditional adsorption equilibrium is effectively broken through, and deep removal and semiconductor-grade purification of trace iron ions are achieved.

This invention belongs to the field of microwave technology, specifically providing a high-order mode suppression transition structure based on two equal-power excitation odd-symmetric electric fields to achieve single-mode transition between a rectangular single-mode waveguide and a rectangular overmode waveguide. It includes a rectangular waveguide power divider, a rectangular connecting waveguide, and a rectangular overmode waveguide. The two rectangular connecting waveguides connect the outputs of the two equal-power-dividing rectangular waveguide power dividers to the rectangular overmode waveguide, with their wide-side centers located at 1 / 3 and 2 / 3 of the wide side of the rectangular overmode waveguide, respectively. The rectangular overmode waveguide TE is in-phase excited. 30 At the odd-symmetric location of the mode electric field, the TE in the rectangular overmode waveguide is realized. 30 and TE k0 Suppression of modulo (k is an even number greater than or equal to 2). Its advantage is that it solves the problem of traditional transition mode (TE) not being effectively suppressed. 30 The problem of the module, while realizing the TE k0 Suppression of modulo (k is an even number greater than or equal to 2) has the advantages of good performance, low cost, small size, light weight and easy implementation, and has extremely high application value.

The split type flexible wearable sleep respiration monitoring system comprises an upper computer, and a flexible respiration mobility monitoring patch, a flexible ECG monitoring patch and a PPG monitoring module which are connected with the upper computer in a wireless mode; the flexible breathing mobility monitoring patch is composed of a battery, a strain sensing unit, a temperature sensing module, a three-axis gyroscope and a communication module, wherein the strain sensing unit, the temperature sensing module, the three-axis gyroscope and the communication module are connected with the battery. According to the strain sensing unit, the PDMS substrate with the shore hardness of 10-20 A and the thickness of 0.5-2 mm and the metal conductive layer with specific parameters are adopted, and the weight lt of a single patch is matched; by means of the lightweight design of 12 g, biocompatibility is good, foreign body sensation is avoided, the adhesive force lasts for 24 h or more, and the long-term home monitoring requirement can be met; and meanwhile, the model selection standard of core components is defined, the problem of insufficient flexibility of integrated design is avoided, and the working consistency and reliability of equipment are guaranteed.

This invention relates to a precision variable fertilization control system for farmland based on intelligent agents and edge computing, applied in the field of smart agriculture. The system includes a cloud-based model management unit, multiple edge intelligent agent nodes, a variable fertilization execution mechanism, and a human-machine collaborative interaction terminal. Multiple edge intelligent agent nodes collaborate based on distributed arbitration rules to resolve operational conflicts related to shared agricultural resources. This rule uses resource token management as its core mechanism. When spatiotemporal conflicts arise between nodes regarding resource demands, they exchange negotiation messages containing token status, resource demands, and benefit values. Each node independently runs the arbitration algorithm, reaches a consensus, and generates a collaborative operation sequence table as a scheduling credential, thereby driving the execution mechanism. This invention fills the technological gap in autonomous collaborative rules at the physical execution layer of distributed agricultural equipment, achieving decentralized, highly robust, and highly secure precision variable fertilization operations.