9results about How to "The control method is simple and convenient" patented technology

The invention relates to a lanthanide perovskite type oxide coated high-nickel ternary positive electrode material and a preparation method thereof. The positive electrode material is spherical-like particles formed by coating a high-nickel ternary positive electrode material with a lanthanide perovskite type oxide coating layer according to a mass ratio of (0.01-0.03): 1; the chemical formula of the lanthanide perovskite type oxide is LazCa1-zCoO3, and z is more than 0 and less than or equal to 1; the chemical formula of the high-nickel ternary positive electrode material is LiNixCoyMn (1-x-y) O2, x is greater than or equal to 0.80 and less than or equal to 0.96, y is greater than or equal to 0.01 and less than or equal to 0.10, and 1-x-y is greater than 0. The preparation method comprises the following steps: ball-milling and mixing the lanthanide perovskite type oxide and the high-nickel ternary positive electrode material, and sintering at low temperature in a protective atmosphere. The positive electrode material is high in lithium ion and electron conductivity in the charging and discharging process, high in reversibility, stable in structure and good in rate capability and cycling stability. The method is simple, low in cost and suitable for industrial production.

The invention relates to a lithium nickel manganese oxide coated high-nickel ternary positive electrode material and a preparation method thereof. The positive electrode material is spherical particles formed by coating a high-nickel ternary positive electrode material with a spinel type lithium nickel manganese oxide coating layer according to a mass ratio of (0.005-0.040): 1, the chemical formula of the high-nickel ternary positive electrode material is LiNixCoyMn (1-x-y) O2, x is larger than or equal to 0.75 and smaller than or equal to 0.90, y is larger than or equal to 0.05 and smaller than or equal to 0.15, and 1-x-y is larger than 0. The preparation method comprises the following steps: (1) adding a high-nickel ternary positive electrode material into an organic solution containing nickel, manganese and lithium, and stirring and mixing; (2) dropwise adding a precipitant organic solution, stirring for reaction, heating and stirring until evaporation to dryness, and grinding; and (3) sintering and cooling in an oxidizing atmosphere. The positive electrode material disclosed by the invention is highly reversible in charge-discharge reaction, stable in structure and good in rate capability and cycling stability. The method is simple, short in process, good in coating effect, low in cost and suitable for industrial production.

The invention relates to an aperture-adjustable porous radiation refrigeration material and a preparation method thereof. The aperture-adjustable porous radiation refrigeration material is prepared by introducing inorganic nanoparticles onto a polymer-based composite material, wherein the polymer matrix composite material is prepared by compounding cellulose acetate and poly (vinylidene fluoride-co-hexafluoropropylene); the material is endowed with a layered porous structure through a solvent-nonsolvent induced phase separation method, and materials with different pore sizes are prepared by adjusting the proportion of a mixed solvent. By adjusting the proportion of the mixed solvent, the size and morphology of the pores can be adjusted, so that the reflectivity of the material to sunlight is enhanced, and the preparation method has a good application prospect.

The invention provides a Ti-based catalyst and a preparation method and application thereof, and belongs to the technical field of atmospheric pollutant treatment catalysts. The preparation method comprises the following steps: loading an active component precursor onto a Ti-based carrier through an impregnation method, and then carrying out first ultrasonic treatment, first drying and high-temperature heat treatment; the active component precursor comprises transition metal salt and / or rare earth metal salt. The Ti-based catalyst is prepared by the preparation method and comprises a Ti-based carrier and an active component, the Ti-based carrier is a TiO2 nanotube, and the active component comprises transition metal and / or rare earth metal; the Ti-based catalyst is applied to catalytic oxidation of NVOCs, and the reaction temperature is 80-400 DEG C. The preparation method provided by the invention is simple to operate, low in cost and convenient for industrial popularization; the prepared catalyst is large in specific surface area, can effectively improve the selectivity of CO2 and N2 when applied to catalytic oxidation of NVOCs, and is low in reaction temperature and high in purification efficiency of NVOCs.

The present invention discloses a color-controllable cellulose-based structural color film and its preparation method and application. The preparation method of the cellulose-based structural color film comprises the following steps: (1) adding biocellulose to dilute sulfuric acid for hydrolysis treatment, centrifuging, dialysis purification, and ultrasonic dispersion after hydrolysis to obtain a CNC suspension; (2) adding poly(p-phenylene terephthalamide) fiber and KOH to dimethyl sulfoxide, stirring the reaction, and adding water to obtain an N-PPTA solution after the reaction is completed; (3) mixing and stirring the CNC suspension, the N-PPTA solution, and the chiral glucose solution to obtain a film-forming mixed solution; (4) pouring the film-forming mixed solution into a culture dish by casting, drying, and obtaining a color-controllable cellulose-based structural color film. The method of the present invention can improve the color of the structural color film, enhance the mechanical properties, and is suitable for the field of structural color anti-counterfeiting.

The present application belongs to the technical field of lower limb training robot, and specifically discloses a robot lower limb training method, comprising the following steps: step 1, fitting a hip joint rotation angle change curve, a center of gravity up and down position change curve and a center of gravity forward speed change curve according to gait information of a human body; step 2, using a gravity compensation PD control algorithm to control rotation of an exoskeleton motor according to the hip joint rotation angle change curve; using a PD control algorithm with weight reduction bias to control rotation of a lifting motor according to the center of gravity up and down position change curve; and using a PI control algorithm to control rotation of a bottom wheel according to the center of gravity forward speed change curve; the present application provides a robot and a lower limb training method capable of improving human-computer interaction compliance.

The utility model relates to the technical field of targets, and discloses a rotary automatic lifting target which comprises a base, a screw rod is arranged on the base, a target body is fixedly installed on the screw rod, a cavity is formed in the middle wall face of the base and penetrates through the bottom wall face of the base, a threaded sleeve is fixedly installed at the center of the base, and the threaded sleeve is fixedly connected with the screw rod. The bottom end of the threaded sleeve extends into the cavity, and the screw rod is in threaded connection with the threaded sleeve; and a driving assembly is arranged in the cavity and comprises a servo motor and a toothed plate arranged below the screw rod, and the output end of the servo motor is connected with a rotating rod through a coupler. According to the scheme, by arranging the driving assembly, the screw rod and the target can rotate while the screw rod drives the target to move up and down, so that trainees can better perform target shooting training, and the trainees need to accurately judge the time point in the aiming process to shoot the target; therefore, the combat ability of the trainee can be exercised.

The invention discloses a preparation method of an upright double-metal hydroxide film on the surface of alloy steel and a product. The preparation method comprises the following steps: 1) firstly removing oily substances on the surface of alloy steel, cleaning and drying for later use; (2) adding the electro-deposition precursor solution into a three-electrode tank, taking an alloy steel substrate as a working electrode, Ag / AgCl as a reference electrode and a platinum sheet as a counter electrode, carrying out deposition by adopting a multi-potential step method, firstly applying anode potential to the surface of the steel substrate to carry out oxidation dissolution to generate corresponding metal ions, and then immediately applying cathode potential to carry out deposition; and (3) cleaning and drying the working electrode after deposition is completed, so as to obtain the lamellar double-metal hydroxide film with vertically grown lamellar layers on the surface of the aluminum-zinc-magnesium plated steel. According to the LDHs prepared by the method, film-forming metal ions do not need to be obtained from the outside, and the obtained film is vertical to the surface of a substrate in a lamellar manner, so that the limitation of film forming is greatly solved, and the production steps and raw materials are greatly simplified.

Internal high-pressure forming equipment based on servo electric cylinders comprises a working table, a main cylinder, an electrical control system, a mold, two electric cylinder supporting racks and the two servo electric cylinders. Four guide stand columns are arranged on the working table, and a main cylinder supporting rack is arranged on the four guide stand columns; flange mounting seats are symmetrically arranged on the left side and the right side of the working table; the main cylinder is mounted on the main cylinder supporting rack; the two servo electric cylinders are fixedly installed on the two electric cylinder supporting racks through electric cylinder fixing bases respectively, and the front ends of the servo electric cylinders are installed on the working table face through flange installation bases. And the electrical control system is electrically connected with the servo electric cylinder. According to the internal high-pressure forming equipment based on the servo electric cylinder, a side cylinder of the internal high-pressure forming equipment is changed into the servo electric cylinder from a hydraulic cylinder, hydraulic driving is converted into electric driving, the execution speed and the control precision of internal high-pressure forming of pipe fittings are improved, and the control difficulty of a control system is reduced.