74results about How to "Inhibition appears" patented technology

The invention discloses a low-cost sintered neodymium boron magnet, which comprises components including, by weight percentage, 5.0-6.5% of Pr (praseodymium), 20-28% of Nd (neodymium), 3-5% of Ho (holmium), 1.0-1.1% of boron, 0.4-0.8% of Al (aluminum), 0.1-0.2 % of Zr (zirconium), 0.4-0.6% of Nb (niobium), 0.12-0.17% of Cu (copper), 0.03-0.08% of Ga (gallium), 0.4-1.0% of Co (carbon monoxide) andthe balance iron. The production method includes: pretreatment of raw materials, ingot casting and smelting, hydrogen decrepitation and pulverization, magnetic field orienting and forming, isostatic processing, sintering, ageing and detecting. In the low-cost sintered neodymium boron magnet, high-cost dysprosium of rare metal is substituted by low-cost holmium of rare metal, so that production cost of products is reduced without affecting magnetic performances of the sintered neodymium boron magnet. Furthermore, the production method is simple in operation, excellent ingot casting structure can be obtained by ingot casting and smelting process, and the high-performance sintered neodymium iron boron magnet can be obtained.

An image processing device includes; an image segmentation unit that divides an image information set into a plurality of image areas, the image information set forming a plurality of lines each constituted of colored pixels arrayed in a first direction, and the image information set expressing gradations forming an image as a number of the colored pixels existing in a predetermined image area; an image area shift unit that shifts the predetermined image area among the plurality of image areas in a second direction different from the first direction, relative to an image area substantially contiguous to the predetermined image area; and a pixel replacement unit that replaces the colored pixels forming part of each of the lines and existing within a predetermined distance range from the boundary, with at least one of the colored pixels intervening between the lines.

A radiation sensitive composition used for forming a dyed layer, comprises (A) a colorant, (B) alkali-dissoluble resin, (C) a polyfunctional monomer, (D) a photopolymerization initiator and (E) a solvent, the (E) the solvent contains 5-40% cyclohexyl acetate by weight. A solvent of a dry matter generated at a slot nozzle portion by the composition has a higt re-dissolubility, and has little boiling holes.

The invention provides a symbol timing synchronization method, applied to a visible light DCO-OFDM system. The method comprises the following steps: performing correlation operation on received signals on a receiving end by using the correlation of training sequences inserted in a character string to obtain a timing measurement curve; and detecting a peak position of the timing measurement curve of a symbol to determine the starting position of the symbol. The invention further provides a symbol timing synchronization system. According to the technical scheme provided by the invention, a training sequence is designed by means of the feature that the correlation at the central positions of the centrosymmetric sequences is the maximum, centrosymmetric PN sequences are added to effectively inhibit the occurrence of subsidiary peaks, the drop of main peaks is more steep, and the interference of judging the starting position of the symbol is smaller, which is conducive to ensuring more accurate symbol timing and accurate demodulation work of a communication system on the receiving end.

The invention provides an LED surface-mounted lamp display screen, which comprises a screen body and an LED surface-mounted lamp module, wherein the LED surface-mounted lamp module comprises LED surface-mounted lamps and a sleeve member for installation of the LED surface-mounted lamps; a reflection cover is arranged in the sleeve member; a semitransparent reflection cover plate is arranged at the upper end of the sleeve member in a covering way; the LED surface-mounted lamps are clamped between the reflection cover and the transparent reflection cover plate; the reflection cover is in a shape of a groove with a certain slope; and a certain distance is reserved between the semitransparent cover plate and an LED wafer. Due to the existence of the semitransparent reflection cover plate, surface texture can be remarkably improved, in particular when a plane is closed. In addition, due to arrangement of the reflection cover behind the LED surface-mounted lamps and the semitransparent reflection cover plate in front of the LED surface-mounted lamps, a light source of each independent LED surface-mounted lamp can be amplified, so that lights of all the LED surface-mounted lamps are connected to a whole, therefore moire fringes can be prevented from occurring, and visual effect during shooting and/or video recording is improved.

The invention discloses a rare earth aluminum alloy, and belongs to the technical field of aluminum alloy preparing. The rare earth aluminum alloy comprises the following raw materials of aluminum, copper, vanadium, manganese, tin, chromium, a rare earth element, titanium carbide, tungsten carbide, tungsten silicide, tungsten, a refining agent and a grain refiner; and the rare earth aluminum alloyis prepared through the steps of fusion, refining, drossing, casting and the like. By means of the process, the strength of extension, the elongation at break and the corrosion resistance of the rareearth aluminum alloy can be obviously improved.

The invention provides a diffusion sheet and a method of manufacturing the same, a backlight, and a liquid crystal display device. The diffusion sheet includes: a substrate having a first principal surface and a second principal surface; and structures each in a convex shape formed randomly on the first principal surface or the second principal surface of the substrate. The structures have an identical or almost identical height. The structures have an aspect ratio h/r, where r denotes an average radius of the structures and h denotes an average height of the structures, of more than 0.85 and not more than 1.50. The structures have a filling factor of not less than 60% and not more than 80%.

The invention discloses a high-performance Ga containing cast sheet magnet and a preparation method thereof. The high-performance Ga containing cast sheet magnet comprises the following components by weight: 6.0-9.0 percent of Pr, 20.0-25.0 percent of Nd, 0.5-1.5 percent of B, 0.05-0.3 percent of Al, 0.10-0.2 percent of Cu, 0.1-0.2 percent of Zr, 0.15-0.25 percent of Ga, 0.1-0.5 percent of Co, and the balance of Fe. The preparation method comprises the following steps: cast sheet smelting, hydrogen decrepitation, jet milling grinding, magnetic field oriented moulding, isopressing and sintering. The high-performance Gd containing cast sheet magnet and the preparation method thereof have the advantages that on one hand, in the cast sheet smelting process, no alpha-Fe crystals exist in a cast sheet structure, and a cast sheet is broken more easily, so that the production period is shortened; on the other hand, Zr, Ga and Co metal elements are added, so that the corrosion resistance of the magnet are improved when the magnetism of the magnet is enhanced.

The invention discloses a high-performance cerium-neodymium-praseodymium cast sheet magnet and a preparation method thereof. The cast sheet magnet comprises, by weight, 4.0-5.0% of Pr, 17.0-19.0% of Nd, 6.5-7.5% of Ce, 0.8-1.2% of Gd, 0.9-1.3% of Ho, 0.95-1.05% of B, 0.5-1.0% of Al, 0.15-0.2% of Cu, 0.20-0.40% of Co and the balance Fe for supplement. The preparation method comprises the steps of cast sheet smelting, hydrogen decrepitation, air-current mill smashing, magnetic field orientation forming, isostatic pressing and sintering. According to the high-performance cerium-neodymium-praseodymium cast sheet magnet and the preparation method thereof, on one hand, the neodymium using amount is reduced, but it still can be guaranteed that the magnet has the excellent magnetism, and the neodymium resources are protected; on the other hand, no alpha-Fe crystal exists in cast sheet tissue due to the cast sheet smelting technology, cast sheets are broken more easily, and the production cycle is shortened.

The invention discloses a composition with whitening and spot fading effects, cosmetic and a preparation method thereof. The composition is mainly prepared from, by weight, 2-8 parts of nicotinamide,1-5 parts of glutathione, 1-5 parts of alpha-arbutin, 1-5 parts of phenethyl resorcinol, 1-5 parts of vitamin C polypeptide and 1-5 parts of Kalanchoe pinnata leaf extract. The composition and the cosmetic thereof can prevent melanin from gathering and transferring, and reduce and decolorize melanin; the activity of tyrosinase is inhibited, and oxygen free radicals are removed to change the melanin generation path; therefore, melanin generation is prevented, and whitening and spot fading effects are further achieved.

The invention relates to a super-miniaturized 2.5-dimensional absorption and transmission integrated frequency-selective wave absorber which comprises a plurality of metamaterial units which are continuously and periodically arranged, and each metamaterial unit comprises a top resonance layer, a first dielectric layer, a second dielectric layer, a third dielectric layer and a bottom resonance layer which are sequentially stacked from top to bottom. The top resonance layer comprises a first metal patch unit, a thin-film resistor and four second metal patch units; and the bottom of the first dielectric layer is provided with four third metal patch units, each third metal patch unit is correspondingly connected with the second metal patch unit through a metalized through hole, and the bottom resonance layer is provided with a hollow structure. According to the 2.5-dimensional absorption and transmission integrated frequency-selective wave absorber, a graphene film is adopted to replace a lumped resistor, planar integration and batch production are facilitated, the design that folded metal strips and through holes are combined is utilized, the structure is ultra-miniaturized, grating lobes are restrained, the double-station RCS under oblique incidence is reduced, and the oblique incidence stealth performance is improved.

The invention provides a disease prevention method for asparagus roots, and belongs to the field of vegetation disease prevention. The method comprises the steps of land pretreatment, seedling treatment and planting management; land pretreatment comprises the steps that soil turning is conducted on planting land; a nutrient solution is sprayed to the surface of soil after soil turning is conducted; the soil is burnt with a flame thrower after being sprayed with the nutrient solution; the soil is exposed to the sun after being burnt; organic fertilizer is uniformly sprinkled in the soil after exposure to the sun, the soil is covered with a mulching film, and decomposition and fermentation are conducted; digging for planting is conducted after the organic fertilizer is decomposed and fermented. Accordingly, soil turning is conducted to make pests and miscellaneous bacteria in the soil exposed; the nutrient solution is used for luring the miscellaneous bacteria and pests in the soil out and eliminating the miscellaneous bacteria and pests conveniently; exposure to the sun is conducted to further eliminate the pests in the soil; in order to ensure that after the soil is burnt, high density solar ultraviolet is obtained for disinfection, land pretreatment is conducted in the high temperature and less rainfall period.

The invention relates to the technical field of structure optimization, in particular to a collaborative optimization design method of a constrained damping structure, which comprises the following steps of: constructing a collaborative optimization model of the constrained damping structure by taking maximization of a macrostructure modal loss factor as an optimization target; constructing a finite element model of a constrained damping microstructure, analyzing the equivalent density and the equivalent shear modulus of damping material cell elements based on a progressive homogenization method, and establishing a macroscopic finite element model of a periodic perforated constrained damping plate structure on the basis of the equivalent density and the equivalent shear modulus; calculating the sensitivity of the optimization target to the microcosmic design variable and the macrocosmic design variable; and filtering the sensitivity by adopting a filtering method with a variable filtering radius, and updating a design variable value by adopting a moving asymptotic line algorithm to obtain microscopic and macroscopic topological optimization configurations of the constrained dampingstructure. Under the condition that the usage amount of the constraint damping material is controlled, the damping characteristic of the constraint damping structure is effectively improved, and thegood vibration and noise reduction effect is achieved.