7results about How to "Precise composition" patented technology

The invention provides a preparation method of an accurate miktoarm star polymer for forming a close packing spherical phase, and belongs to the technical field of high polymer materials. Based on an iterative growth method and a modular synthesis strategy, a series of discrete miktoarm star-shaped polymer libraries which have accurate chemical structures and single molecular weight and are based on polyhedral oligomeric silsesquioxane (POSS) are constructed; the miktoarm star polymer can form a hexagonal close packed spherical phase (HCP) with stable thermodynamics in the body self-assembly process. A series of isomerism polymers are designed for specific molecular parameters (such as volume fraction, topological structure, regional configuration and block number) to eliminate interference of other variables, and an ideal platform is provided for quantitatively researching the function of the molecular parameters in the self-assembly process. According to the method, the difference between experimental exploration and theoretical research can be bridged, the basic principle of self-assembly of the block copolymer can be deeply understood, and guidance is provided for reasonable design of novel functional polymer materials.

The invention discloses a composite catalyst for a peracetic acid activation system and a preparation method and application thereof, and relates to the technical field of advanced oxidation water treatment. The preparation method of the catalyst comprises the following steps: preparing an aqueous solution of a cobalt source as a precursor solution; adding a manganese source into the precursor solution to obtain a Co-Mn mixed salt solution; adding a complexing agent into the Co-Mn mixed salt solution to form a stable sol system; heating the sol system at constant temperature to obtain wet gel; drying the wet gel to obtain a porous dry gel precursor; calcining the porous xerogel precursor, and then cooling and grinding to obtain the composite catalyst for the peracetic acid activation system. The composite structure in the catalyst greatly improves the rate of generating hydroxyl radicals and organic oxygen radicals by decomposing peracetic acid by promoting electron transfer circulation of a metal active center, shows good structural stability and recyclability, and is especially suitable for degradation of an organic pollutant sulfamethoxazole in a water body.

The invention discloses a method for accurately controlling the oxygen content of low-carbon low-silicon high-sulfur steel. The method comprises the following steps: controlling the alkalinity of final slag of a converter to be 2.0-2.5; a step-by-step weak deoxidation process is adopted in the converter tapping process, low-carbon ferromanganese, high-sulfur pyrite and ferrophosphorus alloy are sequentially added when 1 / 2 of tapping is performed, and lime and wollastonite are added when 3 / 4 of tapping is performed; an aluminum wire is accurately fed according to the blown dissolved oxygen content w [O] Ar when an argon blowing station enters the station; lime, raw dolomite and wollastonite are added in batches in the LF heating process; after heating, adding an aluminum-based reducing agent, and adding lime and wollastonite for slagging; after slagging is finished, alloy fine adjustment is conducted, and aluminum wire feeding or iron oxide scale adding on the slag surface is conducted; carrying out secondary heating on the LF, feeding a pure calcium core-spun yarn after the heating is finished, and carrying out soft blowing out of the station; carrying out soft reduction on a casting blank after continuous casting; according to the method, the problem that the oxygen content control fluctuation is large in the smelting process is solved, accurate control over the oxygen content of the molten steel is achieved, and a casting blank with the good sulfide inclusion form and the good surface quality and a product with the excellent cutting performance are obtained.

A remote control assembly for mobile phone selfies includes a data cable and a remote control. One end of the data cable connects to the phone's interface, and the other end connects to an external display screen. The remote control is magnetically attached to one end of the data cable. This invention solves the problems of not being able to preview in real time when using a rear camera for selfies, the remote control being easily lost, and the cables being messy and difficult to store, by organically integrating the external display screen, data cable, and remote control. The remote control and data cable are temporarily fixed and stored using a magnetic structure, and an anti-detachment seat structure and positioning buckle are set at the end of the data cable, solving the problems of easy loss of the remote control and loose data cable. This makes the overall device simpler, more reliable, and more aesthetically pleasing during use and storage, improving portability and user experience.

The embodiment of the invention provides a wax oil fraction molecular component analysis method, a wax oil fraction molecular component analysis device and electronic equipment. The analysis method of the wax oil fraction molecular components comprises the following steps: according to the macroscopic property of a wax oil fraction to be detected, obtaining the composition of molecules to be corrected of the wax oil fraction to be detected and the digital representation of various compound molecules contained in the wax oil fraction to be detected from an established wax oil molecule database; wherein the wax oil molecule database records the corresponding relationship between the molecular composition and the macroscopic properties of multiple wax oil fraction samples, and the digital representation of the compound molecules contained in each wax oil fraction sample; and performing iterative correction on the to-be-corrected molecular composition of the to-be-detected wax oil fraction by utilizing the macroscopic property acquisition model of the wax oil fraction based on the digital representation of various compound molecules contained in the to-be-detected wax oil fraction to obtain the molecular composition of the to-be-detected wax oil fraction. According to the method, the molecular composition of the wax oil fraction can be accurately, conveniently, quickly and uniquely obtained.

The invention discloses a view finding control method of head-mounted equipment, and relates to the technical field of intelligent wearable equipment. The method comprises the steps of determining a fixation point of a wearing user in a three-dimensional space based on a sight line direction and a fixation depth; projecting the fixation point to a pixel plane of a main camera of the head-mounted device to obtain a corresponding pixel coordinate; and based on the pixel coordinates and a preset shooting composition rule, adjusting a target corresponding to the fixation point to a shooting picture framed by the electronic cutting window according with the preset shooting composition rule by adjusting the position of the electronic cutting window in the shooting picture of the head-mounted device or adjusting the orientation of a main camera of the head-mounted device. By fusing the eye physiological signals, the head space posture and the camera space geometry, the three-dimensional coordinates of the fixation point of the wearing user are accurately calculated, the head-mounted equipment is intelligently controlled to accurately shoot the image with the target corresponding to the fixation point of the wearing user as the center, and the function of automatically shooting high-quality pictures is achieved.

The invention relates to a long-acting super-hydrophobic coating for corrosion prevention and a preparation method and application thereof, and relates to the technical field of metal surface treatment and corrosion prevention. The long-acting super-hydrophobic coating comprises a low-surface-energy substance and a layered dihydroxide, and the long-acting super-hydrophobic coating is of a micro-nano layered structure. The long-acting super-hydrophobic coating can ensure that after the surface layer of the coating loses the hydrophobicity, the interior of the coating can still effectively prevent a corrosive medium from infiltrating a substrate due to the characteristic of high compactness, and a very good protection effect on the substrate is achieved, so that the whole (super) hydrophobic coating can effectively prevent the substrate from being corroded before and after losing the super-hydrophobic performance, and the service life of the coating is prolonged. The coating has a long-acting anticorrosion effect on a substrate.