5results about How to "Effective size control" patented technology

The application provides an optical camera lens, comprising a lens barrel, a first lens to a sixth lens, a first spacing element located on the image side of the first lens and in contact with the image side surface of the first lens, a second spacing element located on the image side of the second lens and in contact with the image side surface of the second lens, a third spacing element located on the image side of the third lens and in contact with the image side surface of the third lens, a fourth spacing element located on the image side of the fourth lens and in contact with the image side surface of the fourth lens, and a fifth spacing element located on the image side of the fifth lens and in contact with the image side surface of the fifth lens; the maximum field angle of the optical camera lens is greater than 110 degrees; the outer diameter D5s of the object side surface of the fifth spacing element, the inner diameter d5s of the object side surface of the fifth spacing element, the effective focal length f of the optical camera lens, and the maximum field angle FOV of the optical camera lens satisfy the following relationship: (D5s+d5s) / [f*tan(FOV / 2)]<2.0. The application solves the problem of poor edge imaging quality of the optical camera lens in the prior art.

The application discloses a kind of lentinus edodes factory directional single side cultivation method, belong to lentinus edodes cultivation technical field, the application adds hydrated silica in lentinus edodes liquid culture medium, effectively controls lentinus edodes ball size using its high friction value, make its flowability stronger, and sodium calcium phosphosilicate can effectively improve lentinus edodes mycelium amount.Red and blue double film bag is used simultaneously with the characteristics of light transmission and oxygen injection, causing the difference in maturity of the surface of the stick, so as to realize the mature face mushroom, non-mature face energy supply.Through the special mushroom cultivation layer frame setting stick independent liquid supplement component, it can not only increase the connection firmness of lentinus edodes stick and frame, but also realize liquid supplement on cultivation layer frame.The application overcomes the difference in evaporation speed of the mushroom surface caused by the stick layer block in the layer frame mode, significantly shortens the lentinus edodes cultivation period, realizes the stable synchronization of stick color change, directional mushroom, precise water replenishment, and has good economic benefits and application prospect.

The invention discloses a PtPdCuFe alloy nano enzyme material, and belongs to the technical field of nano materials and analytical chemistry. According to the technical key points, four metal atoms of platinum, palladium, copper and iron are uniformly distributed on the nanoscale to form an alloy structure, and the unique quaternary composition and atomic-scale mixing generate a synergistic effect, so that the catalyst has excellent oxidase-like and peroxidase-like activities at the same time. The invention also discloses a colorimetric sensor containing the material, and a method for detecting in a buffer system through catalytic oxidation and coupling with nitrite by using the oxidase-like activity of the material. According to the method, the peroxidase-like activity of the material is utilized, and TMB oxidation is inhibited through thiophanate-methyl in the presence of hydrogen peroxide for detection. The invention further discloses a method for synthesizing the quaternary alloy material through a one-step hydrothermal method. The method is mainly used for high-sensitivity and high-selectivity rapid colorimetric analysis of nitrite pollutants and thiophanate-methyl pesticide residues in food and environmental samples.

This invention relates to a continuous flow stepwise crystallization method and system for preparing micro / nano HMX at the microscale. It includes the following steps: (1) dissolving HMX in a solvent to form an HMX solution, and mixing the solvent and antisolvent to prepare a crystallization transfer solution; (2) flowing the HMX solution prepared in step (1) and the antisolvent into a primary micro-mixing crystallization unit at a desired flow ratio to generate a mixed-crystal HMX suspension with a mixed crystal particle size of 400 nm–60 μm; (3) flowing the mixed-crystal HMX suspension flowing out of the primary micro-mixing crystallization unit and the crystallization transfer solution prepared in step (1) into a secondary micro-mixing crystallization unit at a desired flow ratio, and secondary crystallizing the mixed-crystal system to obtain a pure β-HMX suspension with a crystal size in the micrometer range. This invention can obtain micro / nano β-HMX with high crystallization degree and high crystal purity by changing the mixing conditions and residence time in the secondary crystallization unit; the two-step crystallization method can meet the requirements for continuous and controllable preparation of high-quality elemental β-HMX with smaller crystal size and higher crystal purity.

The invention discloses a modified lithium titanate material as well as a preparation method and application thereof, and the preparation method comprises the following steps: S100, ball-milling a titanium source and a lithium source to prepare first powder; s200, heating and carrying out a first solid-phase reaction on the first powder to prepare a first precursor comprising a lithium titanate crystal nucleus; s300, carrying out densification treatment on the first precursor to obtain a blocky second precursor, and heating to carry out a second solid-phase reaction on the second precursor to prepare a blocky third precursor containing single-crystal lithium titanate; and S400, mechanically crushing the third precursor to prepare the modified lithium titanate material. Wherein the modified lithium titanate material is single crystal lithium titanate particles, the use stability and the use safety of the lithium ion battery are enhanced, and the modified lithium titanate material has low porosity and is beneficial to improving the energy density of the lithium ion battery. The modified lithium titanate material with high thermal stability is beneficial to enhancing the use safety and use stability of the lithium ion battery under a high-temperature working condition.