14results about How to "Avoid potential hazards" patented technology

The application relates to the field of microbial treatment, and particularly relates to a metal inoculation ring capable of testing impedance by electrification, which comprises a metal working end used for contacting and absorbing a sample, a mounting part connected with the metal working end, and a control module electrically connected with the metal working end, wherein the control module comprises a mode switching unit used for switching between a heating mode and a detection mode, a power driving module used for applying an electric current to the metal working end in the heating mode so that the metal working end generates heat to achieve sterilization, and an impedance detection module used for applying a detection electric signal to the metal working end in the detection mode to detect the absorption condition of the sample; and the control module is configured to judge the state of the sample absorbed by the metal working end according to the change of the electric characteristic parameter relative to a reference value in the detection mode. The metal ring has the functions of heating sterilization and impedance detection, and can objectively judge whether the absorption amount of the inoculation ring reaches a preset standard.

The invention discloses a polymer modified asphalt composition and a preparation method thereof, and relates to the technical field of asphalt materials. The invention has the advantages that the performance of the asphalt composition is improved through composite modification of multiple components, the surface activity of nano silicon dioxide is enhanced after pretreatment, the gaps between asphalt molecules are filled, the structural stability and wear resistance are improved, and the nano silicon dioxide is tightly combined with the asphalt molecules due to its nano size, the plant polymerizable components extracted from flax seeds are subjected to a series of treatments, and the active groups thereof react with the asphalt molecules to improve the flexibility and adhesion, the ionic liquid is synthesized and pretreated, and the anions and cations act on the active sites of the asphalt molecules to improve the anti-aging performance, the thermosensitive polymer is composed of a copolymer containing specific chain segments, the low-temperature shrinkage makes the molecular structure compact and crack-resistant, and the high-temperature stretching adapts to the volume expansion and remains stable, effectively improving the high-temperature stability and low-temperature crack resistance, and extending the service life of the paved material.

The application relates to the technical field of organic functional materials, and discloses a bis-aryl semi-indigo monomer, a functional polymer film and a preparation method and application thereof. The preparation method of the bis-aryl semi-indigo monomer comprises the following steps: dissolving a compound A and sodium hydride in an organic solvent, stirring and reacting to obtain a precursor solution; adding a bromide compound containing R 9 to the precursor solution to perform an alkylation reaction, then adding a saturated ammonium chloride solution to quench the reaction, separating and collecting an organic phase; washing, drying and concentrating the organic phase to obtain a crude product; purifying the crude product through column chromatography, and then performing recrystallization to obtain the bis-aryl semi-indigo monomer. The application introduces a polymerizable functional group into a bis-aryl semi-indigo mother nucleus structure to prepare a polymerizable bis-aryl semi-indigo monomer, the bis-aryl semi-indigo monomer has bidirectional visible light response characteristics, can realize E / Z configuration reversible isomerization under the driving of green light and red light dual visible light bands, and can realize rapid and reversible color change in the full visible light band.

This invention discloses a waterborne epoxy curing agent, its preparation method, and its application, belonging to the field of waterborne epoxy coating technology. It solves the problems of slow drying speed, poor flash rust resistance, inadequate water and salt spray resistance, and reliance on organic solvents in existing waterborne epoxy curing agents. The preparation method includes the following steps: adding an aliphatic polyamine to a reaction vessel, heating to 70-80°C, and then adding a mixture of epoxy resin and polyethylene glycol diglycidyl ether dropwise for an addition reaction; maintaining the temperature after the addition is complete, and then performing vacuum distillation; adding maleic anhydride oil to the product after vacuum distillation, and heating to 90-95°C for a reaction; cooling after the reaction, and then adding deionized water dropwise for emulsification to obtain the waterborne epoxy curing agent. This invention utilizes green, solvent-free production, and the resulting curing agent exhibits fast drying speed, excellent flash rust resistance, water resistance, and salt spray resistance.

The application discloses a floating photovoltaic power generation device suitable for fish culture, which comprises a corrosion-resistant floating body, a power generation module, a sun tracking module and a self-cleaning module integrated on the floating body to form an integrated independent power supply unit, and photovoltaic panels replace high-voltage power transmission to supply power to the culture device; the sun tracking module realizes sun tracking of the photovoltaic panels through a two-degree-of-freedom deflection structure combined with intelligent control and takes into account underwater culture illumination; the self-cleaning module realizes automatic cleaning of the photovoltaic panels through cooperation of a brush / roller brush and spraying; the floating body can be used alone or composed of a power generation group, and is matched with structures such as buoyancy reinforcement, gravity center lowering and wind and wave resistance linkage, and is suitable for different scales and types of culture water areas. The application realizes on-site power consumption, eliminates hidden dangers of high-voltage power transmission, improves photovoltaic power generation efficiency, reduces operation and maintenance cost, takes into account power generation and culture ecology, and has high practicability.

The utility model discloses a near-infrared transmission and reflection mode fusion imaging system. The imaging system comprises an illumination system, a data acquisition system and an information processing system which are connected in sequence, the lighting system comprises a laser; the data acquisition system is used for acquiring near-infrared image information of a test object; and the information processing system is used for providing an image processing and analysis algorithm so as to analyze the near-infrared image information. According to the utility model, on the basis of near-infrared transmission and reflection mode fusion imaging technology, bone defect detection of a position point of the oral implant and the periphery of the implant is realized; based on selection of the near-infrared light source and the near-infrared detector suitable for the oral cavity, clear images can be obtained in the oral cavity environment.

The invention belongs to the technical field of deep sea plume inhibition, and particularly relates to a biomass flocculant as well as a preparation method and application thereof. The raw materials comprise sodium alginate, acrylamide and dodecane dimethyl betaine, and the ratio of the mass of the sodium alginate to the volume of the acrylamide to the volume of the dodecane dimethyl betaine is 1g: (2-4) g: (0.5-1) ml. Natural or bio-based materials such as sodium alginate, acrylamide and dodecane dimethyl betaine are adopted as main components, marine polysaccharide is fully utilized as a raw material, and dodecane dimethyl betaine introduced to flocculant material molecules can reduce the viscosity of a flocculant solution, so that the requirements on pipelines and pumping devices are reduced, and the cost is reduced. And the pumping efficiency of the flocculating agent is improved, the damage of the deep sea plume to the ecological environment is effectively inhibited, and good economic benefits and environmental benefits are achieved. The product is non-toxic and harmless, has good biodegradability, and avoids the potential harm of the traditional inorganic flocculant to the deep sea ecological environment.

The invention aims to provide the hair essence production formula, various components with the effects of enhancing hair quality and improving scalp health are accurately proportioned, meanwhile, the synergistic effect is shown in the aspect of activating the activity of tyrosinase, and the prepared essence can effectively increase the black hair rate and has an excellent effect of turning white hair into black.

The invention relates to a master-slave control device, a master-slave control system and a master-slave control method for cataract ophthalmic surgery. The method comprises the following steps: dividing a plurality of equipment slave stations into response slave stations and standby slave stations according to slave station use requirements corresponding to a surgery stage; determining a target transmission sequence according to the fact that the transmission priority of the response slave station is higher than that of the standby slave station; generating a second operation instruction of the slave manipulator according to the first operation instruction of the master manipulator based on a preset mapping model; the control master station generates a data frame comprising a plurality of sub-instructions, and transmits the data frame according to the target transmission sequence through the real-time communication network; the plurality of equipment slave stations obtain corresponding sub-instructions from the real-time communication network; the first instruction threshold value and the second instruction threshold value of each equipment slave station are set, the execution strategy of the sub-instructions is determined based on the two instruction threshold values, the equipment slave stations are controlled to execute the sub-instructions according to the execution strategy, various risks of different degrees are flexibly dealt with, and the smoothness, the real-time performance and the safety of the equipment slave stations in instruction execution in the operation process are balanced.

Embodiments of the present application provide a gain adjustment method, an earphone, an electronic device and a storage medium, which are applied to the earphone. The method comprises: collecting environmental background sound information; obtaining an emotional state of a user; adjusting a pre-obtained basic gain curve for the user according to the collected environmental background sound information and the emotional state to obtain an adjusted gain curve; and performing gain processing on the collected environmental background sound according to the adjusted gain curve. By combining the background sound information of the environment around the user and identifying the emotional state of the user, the audio gain curve is dynamically adjusted, thereby enhancing the hearing experience of the user in a specific scenario and making the life of the user more convenient and efficient.

The application provides a method for preparing an intermediate of abubinitin by using a micro-channel reactor, 3-oxocyclobutane acyl chloride and sodium azide are respectively dissolved and pumped into a micro-channel reactor I to perform an acyl azide reaction, and the intermediate reaction solution is continuously pumped into a micro-channel reactor II to perform a reaction with benzyl alcohol to obtain 3-oxocyclobutyl benzyl carbamate. The micro-channel reactor is used as a core reaction equipment, continuous acyl azide reaction and continuous Curtius rearrangement reaction are realized, the method has the advantages of high yield, good quality, reduced reaction risk, high mass and heat transfer efficiency, safe and simple operation and the like, and is beneficial to the large-scale production and application of the intermediate.

The utility model discloses a chemical reagent test culture dish which comprises a box body, the inner wall of the box body is connected with a fixing frame, the inner wall of the fixing frame is connected with a plurality of damping rods in a sliding mode, the outer surfaces of the damping rods are all sleeved with buffer springs, the end, away from the fixing frame, of each damping rod is connected with a clamping block, and the clamping blocks are arranged on the outer surfaces of the damping rods. The outer surfaces of the multiple clamping blocks are made of sponge materials, a sealing cover is hinged to the top end of the fixing frame, and a locking block is connected to the right side face of the sealing cover. The fixing frame is arranged, buffer springs are matched with damping rods, the device can adapt to culture dishes of various sizes, the universality and flexibility of the device are improved, the clamping blocks are matched with the buffer springs and the damping rods, bumping and shaking in the transportation process can be absorbed, impact on culture dish bodies is reduced, and the service life of the device is prolonged. A sealing cover is matched with a locking block, so that the reagent in the culture dish main body can be prevented from flowing out due to bumping in the transportation process.

This invention discloses a method for treating livestock and poultry manure through composting, which can significantly improve the seed germination index. This method effectively increases the seed germination index. After a secondary aerobic treatment in a composting tank for 5 to 10 days, the seed germination index is significantly improved. Experiments have verified that it can increase by more than 50% compared to the untreated state, meeting or even exceeding the requirements of organic fertilizer industry standards for seed germination index. The aerobic treatment method used in this invention requires no chemical reagents, utilizing only a natural aerobic fermentation process, thus avoiding the potential harm of chemical residues to the soil and environment, and aligning with the concept of green and environmentally friendly agricultural development.

The present invention discloses a closed circulation system for cooling water supply of a crucible and an operation method thereof. The closed circulation system for cooling water supply of a crucible comprises an external circulation water supply system, an internal circulation cooling water system and a water supply tank D. The internal circulation cooling water system for cooling the crucible is a closed circulation system. The external circulation water supply system and the internal circulation cooling water system exchange heat through a heat exchanger E. The external circulation water supply system supplies water to the water supply tank D, and the water supply tank D supplies water to the internal circulation cooling water system. The water supply tank D is connected to a drain through an overflow port. The external circulation water supply system, the internal circulation cooling water system and the water pump outlet of the internal circulation cooling water system are all connected to the drain through a pipeline. The system has high operation stability and high safety.