31results about How to "No complex post-processing required" patented technology

The invention discloses a photon-number distinguishable detection-based true random number generator and belongs to the class of quantum secure communication. Different photon-number incident events are combined into a 2-bit random number sequence according to the uncertainty principle of poisson distribution by using the characteristics of a photon-number distinguishable detector capable of distinguishing incident photon numbers. The true random number generator mainly comprises a photon-number distinguishable detection module, a photon-number identifying and processing module and a random number acquisition module and can generate high-speed random secret keys needed in the quantum secure communication. The true random number generator has stable and reliable random sources; the generated true random number cannot be repeated or deciphered by the random characteristics of light quanta; a complex post-processing procedure is not needed; and the true random number generator is convenient to use.

The invention relates to a controllable graphene nanolayer preparation method. The method comprises the steps that graphite powder is put into a reaction container, a solvent is injected into the reaction container, ultrasonic vibration is conducted, and a stirrer is started, so that the raw material-graphite powder is fully and uniformly distributed in the solvent; a laser path is adjusted, so that laser beams sequentially pass through a total reflective mirror and a focus lens and then are focused at the position 3 mm below the liquid level; a pulse laser is started, different kinds of laser energy are adjusted to enable laser light to irradiate graphite particles in a liquid environment, after the reaction process lasts 1 h to 2 h, the laser is stopped, and finally graphene with the different layer numbers can be obtained. The method is easy to operate, controllable in layer number and free of toxins and pollution and has potential application in the fields of nanometer equipment and spintronics.

The invention provides a method for preparing metal particle-loaded coal-based graphene through high-temperature thermal shock. Nano metal particles are introduced into a carbon source through a dipping reduction method. According to the method, the carbon sources such as coal, coal pitch, coke and coal-based graphite are subjected to high-temperature thermal shock graphitization and metal salt thermal reduction by utilizing joule heat generated by capacitor discharge, and the coal-based graphene-loaded metal particles are generated in a short time. The metal used in the metal nano particle loading process is transition-state metal such as Fe, Co, Ni and Cu, and the metal salt is one of chloride or hydrate thereof, acetate or hydrate thereof. The preparation method is simple, low in cost, high in product graphitization degree, excellent in performance and suitable for large-scale production and has important application value.

The invention relates to a CaTiO3/CaO composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: S1, slowly adding a CaCO3 suspension into a TiOSO4 solution which is continuously stirred under a first preset temperature condition, and uniformly stirring to obtain a mixed solution; S2, stirring the mixed solution obtained in thestep S1 under a second preset temperature condition at a constant temperature, dropwise adding a CO (NH2) 2 solution, and adjusting the pH value of the mixed solution to 5-7; and S3, carrying out hydrothermal reaction on the mixed solution obtained in the step S2, and calcining a product of the hydrothermal reaction to obtain the CaTiO3/CaO composite material. According to the method, strong acidand strong alkali are prevented from being used, meanwhile, the cubic CaTiO3 and spherical CaO composite photocatalytic material with uniform particle size distribution is prepared through calcination under the low-temperature condition, and the method has the advantages of energy saving, high production efficiency, environmental friendliness, good product performance and the like.

The invention discloses a method for preparing a stable compound through a gas-liquid plasma technology. The method comprises the following steps: (1) mixing a silver nitrate water solution and a stabilizer water solution to obtain a reaction solution; (2) placing the reaction solution obtained in the step (1) into a container, placing the container at a position below a stainless steel tube cathode of a plasma reactor, and inserting a platinum wire into the reaction solution to serve as an anode; (3) in an inert gas atmosphere, applying direct-current negative bias to the cathode of the plasma reactor, and treating the reaction solution for 10-30 minutes to obtain a colloidal solution containing silver nanoparticles; and (4) adding a cationic surfactant into the colloidal solution containing the silver nanoparticles, and carrying out uniform mixing to obtain the stable compound. According to the method, the colloidal solution containing the silver nanoparticles is prepared by utilizing a high-energy electron one-step method through the gas-liquid plasma technology. The method is simple, feasible, green and efficient, and the compound with stability, transparency and excellent antibacterial performance can be obtained by compounding the colloidal solution with the surfactant.

The invention relates to an optical waveguide element, a preparation method thereof and holographic optical waveguide display equipment. The optical waveguide element comprises a laminated body formed by at least two carriers and a photopolymer film, wherein the photopolymer film is positioned between the at least two carriers; the photopolymer film is provided with at least one light coupling-in area and at least one light coupling-out area; the optical coupling-in area is not connected with the optical coupling-out area; and the positions of the optical coupling-in area and the optical coupling-out area are respectively provided with a grating structure. The optical waveguide element has high refractive index modulation degree, diffraction efficiency, sensitivity and light transmittance, and has an excellent optical waveguide imaging effect.

The invention discloses a method for preparing rare earth doped yttrium oxide fluorescent nanoparticles through a DBD technology, and the method comprises the following steps: (1) mixing a substrate metal organic matter and a doped metal organic matter according to a mass ratio of (10-40): 1, and grinding the mixture as a reaction precursor; (2) putting the precursor obtained in the step (1) into a container, and putting the container between the positive electrode and the negative electrode of a plasma reactor; and (3) applying alternating current between the cathode and the anode of the plasma reactor in an oxygen atmosphere, treating the precursor for a period of time, taking out the product every a period of time, and grinding to obtain powder containing the rare earth doped yttrium oxide nanoparticles. According to the invention, powder of rare earth doped yttrium oxide fluorescent nanoparticles is prepared by using a high-activity oxidation component one-step method through a DBD technology. The method is simple and easy to implement, green and efficient, high-temperature and high-pressure further reaction is not needed, and energy consumption is effectively reduced.

The invention discloses a method for producing 2-acetylamino-6-nitrobenzoic acid by sodium chloride reduction. By the aid of steps of the method, the reaction yield is high and reaches 90% or above; due to the strong reducing property of a sodium chloride solution, the reaction speed is high, and a product is not easily oxidized, has good color and luster and is high in quality; complicated aftertreatment is not required, and equipment and operation are simple; little wastewater is produced and is easy to treat, and the method is a low-emission clean process; the sodium chloride solution obtained through recovering and treatment of hydrogen sulfide waste gas in the industries such as petrochemical industry and the like is recycled, and the cost is low.

The invention provides a novel simple biomolecule fixing method, comprising the following steps: firstly synthesizing a metal nano material by a liquid-liquid interface method; then adding biomolecules to a water phase for fixing the biomolecules to the liquid-liquid interface by a bonding action, thus obtaining a composite membrane of the metal nano material and the biomolecules; and finally, extracting the biomolecule-metal composite monodisperse membrane on the liquid-liquid interface by a langmuir technology or directly by a solid substrate. The method for fixing biomolecules provided by the invention has a simple preparation process for forming the biomolecule-metal nano composite material, and has the characteristic that the biomolecules are dispersed in order in a single layer and have good stability.

The invention relates to a florfenicol synthesis method. The method comprises the step of carrying out a ring opening reaction on a product obtained by fluorinating a compound I by using sulfuryl fluoride as a fluorination reagent in a water-containing system to easily prepare florfenicol. The method has the advantages of simple operation, few by-products, safety, environmental protection, low production cost and the like, and is very suitable for industrial use.

The invention discloses a nuclear medicine multi-mode lesion image detection method and system. The method and system can effectively carry out the detection and integration processing of a lesion target image through the information of different modes, do not need extra multi-mode preprocessing work, and can comprehensively and completely reserve the information of each mode. After multi-scale feature fusion, the information of different modes is integrated, detail information of the different modes can be effectively reserved, and subsequent target detection by using the information of the different modes is facilitated. The principle part of a target detection head adopts the Centernet design concept in the prior art, a focus target is described as a central point, other characteristics such as the size of the target are obtained through direct regression in a feature map, and thus, the method is simple in principle and high in compatibility, does not need complex post-processing and achieves end-to-end detection.