9results about How to "Simple system" patented technology

This invention relates to a biomass char composite electrocatalyst supported on nickel-cobalt sulfides, its preparation, and its application. The preparation method includes: subjecting biomass material to high-temperature carbonization to obtain a biomass char substrate with a porous structure; immersing the biomass char substrate in a solution containing nickel and cobalt salts, and obtaining biomass char supported on nickel-cobalt oxides through a hydrothermal reaction; placing the biomass char supported on nickel-cobalt oxides in a solution containing a sulfur source, and obtaining the biomass char composite electrocatalyst supported on nickel-cobalt sulfides through a hydrothermal reaction. The biomass char composite electrocatalyst supported on nickel-cobalt sulfides of this invention can be applied in biomass electrocatalytic oxidation reactions, achieving selective control of the biomass oxidation reaction and oxygen evolution reaction through an external magnetic field, thereby improving the efficiency of high-value conversion of biomass. The magnetic field control method of this invention has advantages such as non-contact control, simple system, and strong applicability, and has good application prospects.

The invention discloses a long single-stranded DNA (deoxyribonucleic acid) preparation method based on hybridization chain reaction, which comprises the following steps: carrying out hybridization chain reaction on an initiation chain I0, a hairpin structure monomer H1 and a hairpin structure monomer H2 to obtain a long double-stranded DNA product; and sequentially connecting 5 ends and 3 ends of adjacent H1 chains in the obtained long double-chain DNA product by adopting T4 ligase, annealing at 95 DEG C, and separating an H1 series long single chain, an H2 short chain and an initiation chain I0, so that the H1 series long single chain is the long single-chain DNA. The invention develops a new method for preparing the long single-stranded DNA, rapid separation of the long single-stranded DNA and the connecting fragment can be realized in the reaction liquid only through simple annealing at 95 DEG C without enzyme digestion or other additional treatment steps, the generated long single-stranded DNA is a circulating sequence, the sequence accuracy is high, and the total length can reach 2240 nt.

The invention belongs to the field of semiconductor materials, and discloses gallium oxide and a synthesis method thereof. The synthesis method comprises the following steps: introducing ammonia water into a gallium nitrate solution, and continuously stirring to obtain a white turbid liquid; aging the white turbid liquid, filtering and washing to obtain an intermediate product; and calcining the intermediate product to obtain solid particles which are gallium oxide. According to the synthesis method, gallium nitrate and ammonia water are used as core raw materials, additional additives and complex precursors are not needed, the impurity introduction risk can be greatly reduced, and the high purity of the product can be guaranteed by combining washing and calcining procedures; meanwhile, the process steps are simple, the operation conditions are mild and controllable, expensive special equipment is not needed, the production cost is low, the method is suitable for large-scale production, and a gallium oxide product with good dispersity and high crystallinity can be obtained after a precursor prepared through a precipitation method is calcined and crushed.

A hot forging steel piston skirt trimming-punching-finishing three-in-one device and processing method for inhibiting hot deformation belong to the technical field of mechanical processing, and are directed to trimming punching production process control of hot forging steel piston skirt forgings with flash or needing punching or both. The four process controls of holding, trimming, punching and finishing of the hot forging steel piston skirt are realized through mutual cooperation of three high-temperature-resistant die springs, and the precision of the piston skirt is greatly improved. The trimming device is simple in structure and safe, can be classified according to different specifications of different cylinder diameter piston skirts, and can meet the high-precision trimming requirements of all hot forging steel piston skirts. The present application innovatively proposes the technical scheme of "three sets of customized rectangular springs cooperative control + synchronous composite process", and for the first time realizes "one clamping and three processes completed simultaneously" of the hot forging steel piston skirt, solves the hot deformation and efficiency bottleneck from the aspects of process principle and structure design, and has remarkable creativity and practicality.

This invention discloses an air separation system and method for co-producing hydrogen, belonging to the field of air separation and hydrogen production technology. It includes four oxygen-permeable membrane reactors and two condensers. The oxygen-producing outlet of the fourth oxygen-permeable membrane reactor (R4) is connected to the second condenser (C2), which has a condensate drain outlet and an oxygen outlet. The nitrogen-producing inlet of the third oxygen-permeable membrane reactor (R3) is connected to the air-producing outlet of the fourth oxygen-permeable membrane reactor (R4). The fuel-producing inlet of the second oxygen-permeable membrane reactor (R2) is connected to the fuel-producing outlet of the third oxygen-permeable membrane reactor (R3). The fuel-producing inlet of the first oxygen-permeable membrane reactor (R1) is connected to both the fuel-producing outlet and the hydrogen-producing outlet of the second oxygen-permeable membrane reactor (R2), and the hydrogen-producing outlet of the first oxygen-permeable membrane reactor (R1) is connected to the first condenser (C1), which has a condensate drain outlet and a hydrogen outlet. This invention simultaneously produces hydrogen, oxygen, and nitrogen through a reasonable process arrangement. The method is simple, efficient, and highly economical and practical.

The application discloses a kind of RPA-Cas12a one-pot rapid detection system and application thereof, the system includes RPA premix and CRISPR-Cas12a premix;CRISPR-Cas12a premix includes ssDNA, Cas12a and crRNA;crRNA is the specific guide RNA sequence based on suboptimal PAM sequence design can guide Cas12a target recognition AHPND RPA product.This application designs specific crRNA, reduces the cleavage efficiency of Cas12a, makes RPA amplification process and CRISPR-Cas12a specific cleavage process simultaneously in a tube reaction, avoids the potential pollution risk of RPA amplification product transfer in two-step method and cumbersome steps, high sensitivity, good stability, provides high sensitivity, high accuracy, good stability, simple and fast AHPND on-site detection method for aquaculture industry.

The application discloses a kind of based on middle-deep or deep geothermal well segmented structure analysis method and terminal equipment, belong to geothermal energy development technical field, can solve middle-deep, deep geothermal well because of flow resistance estimation deviation leads to design failure, cause system overall energy efficiency low problem.The method comprises the following steps: S1, determine the multiple sets of structure design parameters of geothermal well, and calculate the total resistance of each group of structure design parameters corresponding to geothermal well side;S2, according to each geothermal well side total resistance determines the type of corresponding geothermal well side circulating water pump, and calculates the pump operating cost of circulating water pump;S3, calculate the center tube cost expense and geothermal well heating revenue expense corresponding to each group of structure design parameters;S4, according to the total resistance of multiple sets of structure design parameters corresponding to geothermal well side, pump operating cost, center tube cost expense and geothermal well heating revenue expense, determine the optimal structure parameters of geothermal well.The application is used for the structure design of middle-deep geothermal well.

The invention provides a preparation method of a lithium-rich manganese-based composite positive electrode material coated with lithium ferric chloride and an application of a solid-state battery, a lithium ferric chloride coating layer is obtained in situ on the surface of the lithium-rich manganese-based positive electrode material through spray drying, and compared with a common coating layer, the lithium ferric chloride coating layer has the advantages that the coating layer is more uniform; the solid electrolyte has the advantages of good compatibility, excellent conductivity and ion conductivity and the like, and is a novel halide positive electrode material researched and developed for adapting to the solid electrolyte, so that the interface incompatibility between the positive electrode and the solid electrolyte is reduced. In addition, the excellent conductivity of lithium ferric chloride can reduce the use of a conductive agent on the positive electrode side, reduce ion and electron diffusion tortuosity and improve the diffusion coefficient. Meanwhile, the synthesis method is simple and effective, the cost is low, and the prepared composite positive electrode material can be used as an integrated all-solid-state positive electrode material and is suitable for large-scale production.

The embodiment of the specification provides a puncture path determination system, method, device and medium for a brain lesion, the system comprising a measurement handle, a positioning device and a computing device; the positioning device is used to acquire the spatial position and pose of the probe end point of the measurement handle, select a reference surface in a medical image scanning picture, select three feature points on the body surface as registration points on the layer, acquire the spatial coordinates of the registration points by the probe end point of the measurement handle contacting the registration points, so as to determine the reference surface; acquire the position information of the target point relative to the reference surface through the medical image scanning data, and obtain the spatial position coordinates of the target point; and according to the spatial position coordinates of the target point, the direction of the measurement handle is adjusted to point to the target point, so as to determine the direction and depth of the puncture path. The above technical scheme is convenient for positioning information acquisition, simple to operate, avoids the trauma caused by the device to the patient, is easy to popularize, and guarantees the operation effect of the patient.