60 results about "Gradient Increase" patented technology

The invention relates to a preparation method of a hydrogenation catalyst showing gradient increase and distribution of concentration of an active metal and an acid additive. The method comprises the following steps: firstly preparing a relatively dilute active metallic solution and an acid additive solution and deionized water, and then gradually adding a relatively concentrated active metallic solution and an acid additive solution to dip a carrier under a saturate condition during the dipping process; or preparing an active metallic solution and an acid additive solution with different concentrations, and then dipping the active metallic impregnation liquid and the acid additive solution on the carrier in a low-to-high order based on the concentrations; or dipping the carrier with the low-concentration acid additive solution and the deionized water, and gradually adding the high-concentration acid additive solution to the impregnation liquid during the dipping process; drying and roasting; dipping the carrier with the low-concentration active metallic solution and the deionized water, and gradually adding the high-concentration active metallic solution to the impregnation liquid during the dipping process; or dipping the carrier with the active metallic solution followed by the acid additive solution. The method of the invention has higher desulfuration activity, higher denitrification activity and higher residual carbon removal activity, higher stability and simple preparation process.

The invention relates to a grading composition of a hydrogenation catalyst. From top to bottom, a reactor is filled with hydrodemetallization and a hydrodesulfurization catalyst; raw materials flow from top to bottom, and along with the flowing direction of raw materials, the activity of the catalyst gradually increases, the pore size gradually decreases, the grain size gradually decreases and the porosity gradually decreases; the hydrodemetallization catalyst and the hydrodesulfurization catalyst are both formed by one or more demetallization catalysts; concentrations of active metal components and acid auxiliary agents are in nonuniform distribution, and from the surface to the center of catalyst grains, the concentrations of the active metal components and acid auxiliary agents of the hydrodemetallization catalyst are of gradient increase, and the concentrations of the active metal components and acid auxiliary agents of the hydrodesulfurization catalyst are of gradient decrease; and based on weight content, the demetallization catalyst accounts for 15 to 80 percent, and the desulfurization catalyst accounts for 20 to 85 percent. The grading composition of the invention is applied to hydrogenation catalysis of oil and residual oil of heavy ends and has the advantages of possessing better activity and stability of demetallization, residual carbon removal and desulfurization, controlling temperature rise of a catalyst bed and degreasing the deactivation speed of the catalyst.

The invention relates to a hydrogenation catalyst with active metal component concentration in gradient increase and distribution and a preparation method thereof. The preparation method comprises the following steps of: mixing compounds of metal in VIB and/or VIII family with deionized water or ammonia to prepare a metal impregnating solution by using Al2O3 or Al2O3 containing SiO2, TiO2 and ZrO2 as a vector; preparing the hydrogenation catalyst by using a saturated impregnation method; gradually adding denser metal solution for saturated impregnation of the vector by preparing more dilute solutions of metal in VIB and/or VIII family or deionized water; or impregnating the vector first with the metal impregnating solution with low concentration and then with the metal impregnating solution with high concentration by preparing metal solutions of different concentrations; drying for 1 to 8 hours at 80 DEG C to 150 DEG C; and baking for 2 to 6 hours in an air of 300 DEG C to 650 DEG C. The catalyst has the advantages of high desulfurization, denitrification, residual carbon removing activity and stability, simple preparation and lower preparation cost and is suitable for the field of heavy oil hydrogenation.

A compression garment including a thermal energy regulating fabric. The compression garment has a first region of a first compression pressure. A second region adjacent a first side of the first region includes a first compression gradient increasing in compression pressure in a direction toward the first region. A third region adjacent a second side of the first compression region includes a second compression gradient increasing in compression pressure in a direction toward the first region. The first region includes a consistent compression pressure that is a higher pressure than or the highest pressure of the adjacent increasing pressure gradients.

The invention relates a treatment and utilization technology of saline soil resources, in particular to a treatment and utilization method of muddy seashore saline soil. The method comprises the following steps of: establishing a water supply system consisting of a fresh water well, a water pump and a water supply pipe; excavating a salt leaching drainage ditch so as to establish a drainage salt leaching system; applying a cow dung and crop stalk fertilizer and a phosphogypsum soil and fertility improving fertilizer; with a small raised field as unit, irrigating fresh water to wash and leach salt; and planting and maintaining vegetation through cultivating the land by machine, sunning the upturned soil, planting the vegetation and irrigating the vegetation, wherein a planting technology with gradient increasing salt tolerance is adopted in planting the vegetation. According to the invention, for the salinity and structural characteristics of the muddy seashore saline soil, the muddy seashore strongly salined soil in the coastal zone is treated and utilized in combination with engineering measures, physical measures and chemical measures on the basis of salt tolerant plant appraisal; and The treatment and utilization method of the muddy seashore saline soil provided by the invention has the advantages of simplicity in operation, resource conservation, soil treatment and utilization cost of less than 166.21 yuan/m2 and plant survival rate of more than 90%.

The invention relates to a novel liquid injection, infiltration and pre-charging process for lithium ion batteries. The process comprises the following steps: (S1) carrying out vacuum operation on a lithium ion battery before liquid injection, injecting a predetermined amount of electrolyte, and filling a proper amount of film forming additive gas into the battery after injection of electrolyte is finished; (S2) employing the manner of cyclical fluctuation negative pressure infiltration, wherein, fluctuation of negative pressure is expressed with a waveform function instead of a simple first grade linear function; (S3) carrying out formation under the conditions of changing negative pressure and changing temperature, wherein, the negative pressure and temperature both increase gradiently with time, a charging current is not constant and varies in a manner of small gradient increase. The invention enables a predetermined amount of electrolyte to be rapidly absorbed by anode and cathode materials and diaphragms of the battery, and absorption time is short while full absorption is realized, thereby improving the utilization rate of the electrolyte and shortening time for liquid injection; addition of a proper amount of film forming additive gas is beneficial for the formation of SEI membranes and enables inreversible capacity loss of the battery in initial charge to be reduced; the method of pre-charging brought forward in the invention enables uniform and stable SEI membranes to form on the surface of electrodes, thereby improving safety performance and electrochemical performance of lithium ion batteries; the process is simple and is easy to control, investment cost for equipment used in the process is low, and the process is easy to realize.

Elongate hollow fibre polymeric membranes having an outer surface, a plurality of pores and a pore size gradient increasing radially inwardly such that the pores form a substantially hollow passage in the fibre are disclosed. The hollow fiber membranes are made by mixing a liquid lumen forming agent with a polymer dope, and then contacting the dope with a quench fluid for a time sufficient for the dope to solidify, wherein the quench fluid is contacted only at an outer surface of the dope corresponding with an outer surface on the hollow fibre.

The invention provides a method for domestication of salt-resistant activated sludge. The method comprises that substances (such as soil or water) in a high-salt environment are directly added into activated sludge having a normal salt concentration according to a certain ratio and then salt concentration loading is gradually increased, and in the above process, the microflora in the high-salt environment and the microflora in the activated sludge carry out bidirectional coevolution so that novel microflora is formed. The method is free of a complex bacterium screening process, has simple and easy processes, utilizes a novel salinity gradient-increasing scheme, prevents a biomass loss caused by overquick increasing of salinity pressure and realizes fast and efficient domestication of high-salt sludge.

The invention discloses a DataMatrix QR code rapid identification method and device, and an electronic device, relating to the technical field of image processing. The method includes taking the gravity center coordinate of the target image as the quadrant center, and dividing the target image into more than three area quadrants; in each area quadrant, using different edge detection operators to calculate only the gradient-increasing edge of the image boundary to the quadrant center to obtain the edge image; taking the quadrant center as the center of a polar coordinate system, and performingthe linear detection on the edge image to obtain four extreme points in the associated area at distances dL and dh from the quadrant center; and in the image area with the four extreme points as the boundary vertexes, generating the segmentation threshold based on the weight average gray value to perform the binary of the QR code data of the target image. According to the invention, the QR code identification accuracy and identification speed can be improved.

The invention discloses a rapid formation method of a lead storage battery, and belongs to the technical field of storage batteries. The rapid formation method of the lead storage battery includes thesteps: firstly, a to-be-formed battery after adding acid is put in a thermostatic waterbath for formation,thencharged to a gassing potential in a small current gradient increasing way in the initialstage of formation and then charged in a current gradient decreasing way, and polarization is reduced; in the intermediate stage of formation, firstly, charging is conducted to the gassing potential through a large current and then conducted in a gradient decreasing way, conversion of active substances is quickly achieved, and the charging time is saved; and when polarization is large, the currentdischarge is used for discharging, depolarization is achieved, the battery charge receptivity is improved, time consumption of the stage is reduced, and the production efficiency is improved. According to the rapid formation method of the lead storage battery, through process adjustment, the water loss of a battery electrolyte is reduced, the change of the acid density is little, polar plates arerapidly converted into the active substances at the low acid density, the low acid density forms alpha-PbO2 advantageously, and the service life of the battery is prolonged advantageously.

The invention provides a rapid viscosity breaker of a surfactant fracturing fluid. The viscosity breaker is composed of C6-16 alcohol, polyoxyethylene ether, saturated fatty acid, dehydrated sorbitol ester and water. According to the invention, the viscosity breaker can be used for rapid viscosity breaking of a clean fracturing fluid; and at the late stage of fracturing construction, the viscosity breaker is added by a gradient increasing supplementation manner, thus the clean fracturing fluid within a certain range of a well casing is subjected to rapid viscosity breaking, the time for viscosity breaking of the fracturing fluid by migration of formation water or oil to borehole is shortened, and the viscosity breaking effect is effectively improved.

The invention provides a method for preparing solid polymeric aluminum ferric sulfate by use of bauxite oxide, which comprises the steps of roasting the bauxite oxide; adding sulfuric acid for acid dissolution; adding a stabilizer, a small amount of oxidizing agent and an alkalizer for hydrolysis; curing for 36-48 hours to obtain a light yellow sticky solid product, wherein the roasting temperature is in gradient increase, the sulfuric acid is gradually added in a jet flow manner, and the acid dissolution, hydrolysis and curing are all performed under a pressure of 2-5atm. According to the method provided by the invention, the raw material is single and easily available, the cost is low, the preparation process is simple and easy to operate and facilitates industrial production, a finished product prepared by a one-step process is directly in a solid state, the product is convenient to transport and store, and the popularization and application are facilitated.

An image processing device includes: a luminance saturation position detection unit which detects a luminance saturation position that is a position in a captured image at which a luminance value is greater than a predetermined value; a luminance gradient detection unit which detects a luminance gradient around the luminance saturation position; a light source image estimation unit which estimates a luminance distribution on an imaging surface, based on (i) an image at the luminance saturation position, (ii) a point spread function image which corresponds to the luminance saturation position, and (iii) the luminance gradient, such that the luminance value increases as the luminance gradient increases, the luminance distribution being formed by an object whose image is captured at the luminance saturation position; and an unnecessary light subtraction unit which subtracts a luminance value of unnecessary light from the captured image by using the luminance distribution.

The invention relates to a polyethylene microporous film and a preparation method and an application thereof. The preparation method comprises steps that the polyethylene resin is melt and blended with diluent; the melt blended treated product is subjected to molding and cooling treatment to obtain a sheet having a predetermined-shape cross section; the sheet is subjected to longitudinal stretching treatment and transverse stretching treatment to obtain a base film; the base film is post-treated to obtain a polyethylene microporous film, and longitudinal stretching treatment is performed by means of a gradient increasing speed, roller speed ratios of adjacent two stretching rolls are equal and are in a range of 1.1-1.2, transverse stretching treatment is performed at the temperature of 120-130 DEG C, and a ratio of the thickness difference to the width of the sheet is (100~300 mum)/500 mum. The preparation method is advantaged in that the prepared polyethylene microporous film has gaspermeability difference of 30 s/100 cc in the transverse width (3 to 5 m) direction, and the qualification rate is high.

Multiple anisotropy layered magnetic structures for controlling reversal mechanism and tightening of switching field distribution in bit patterned media are disclosed. The invention extends the exchange spring concept to more variable and sophisticated structures. Three or more layers with different anisotropy or anisotropy gradients increase writeability gains beyond the simple hard/soft bilayer exchange spring concept for BPM. The structures have a thin very hard, high anisotropy center layer that acts as a threshold or pinning layer for domain wall propagation through the entire media structure. In addition or alternatively, a thin very soft, low anisotropy center layer in between the commonly used soft surface layer and hard media layer allows quick initial propagation of the domain wall into the center of the media structure. Various properties of the media structures can be tuned more independently for optimization if using more advanced multi-anisotropy layer stacks.

A shielding member applicable in a deposition apparatus is provided. The shielding member includes a base metal and an adhesion promoter layer arc-sprayed on the base metal, wherein adhesion promoter layer has a thickness gradient increasing from an upper end of the shielding member to a lower end of the shielding member. More preferably, no adhesion promoter layer is formed in the upper 10 cm of the shielding member, adjacent to a target layer.

The invention relates to a preparation method of a wear-resistant coating. The preparation method is used for preparing a hard coating on the surface of a substrate and comprises the following steps: selecting the substrate with predetermined size and performance; cleaning and drying a to-be-deposited surface of the substrate; performing sputter cleaning on the to-be-deposited surface of the substrate in a vacuum room of arc ion plating equipment; injecting inert gases and N2 into the vacuum room; depositing a nitride hard coating on the surface of the substrate by adoption of the arc ion plating technology, and in the deposition process, enabling gradient increase or circular gradient increase of the flowrate of N2 to facilitate adjusting the residual stress in the hard coating; and performing vacuum annealing on the hard coating on the substrate to finally obtain the wear-resistant coating with large thickness. Through gradient increase or circular gradient increase of the flowrate of N2, the residual stress of the coating with large thickness is effectively reduced, and the coating has better scratch resistance and fracture toughness.

The invention relates to a process for purifying dialkyl diphenylamine and belongs to the field of purification of material antioxidants. The process comprises: firstly heating dialkyl diphenylamine crude products to be melt, slowly cooling to the temperature of 60-75 DEG C, keeping the temperature of 60-75 DEG C for 5-10 hours, and discharging mother liquid after melt dialkyl diphenylamine crude products are crystallized to obtain a dialkyl diphenylamine crystal layer; heating the dialkyl diphenylamine crystal layer through a method of gradient increased temperature until the temperature rises to be close to a melting point of the dialkyl diphenylamine, and discharging liquid phase to obtain the purified dialkyl diphenylamine. The quality of the dialkyl diphenylamine purified through the process can meet quality requirements of high-purity-level products, and high-quality dialkyl diphenylamine can be obtained through the process while only a distillation process or a solvent crystallization process can not obtain the high-quality dialkyl diphenylamine. The process is simple in operation, free of consumption of any solvent, high in product yield, good in environmental friendliness and capable of causing no waste water or waste gas.

The invention relates to a biomass energy utilization technology, and aims at providing a method for improving micro-algae growth rate and cell fat content employing high-salinity domestication. The method comprises the following steps: inoculating a micro algae liquid into a culture medium of a triangular flask and carrying out enlarge cultivation; and carrying out gradient increase according to 0.3% salinity until inoculating algae species into the culture medium of which the initial salinity is 2.9%-3.1%, and continuously cultivating for 3-5 generations, so as to obtain the high-fat content algae species capable of rapidly growing. By virtue of a high-salinity gradient domestication method, a carbon-nitrogen metabolism pathway of micro-algae cells and the synthesis pathway are reconstructed; the metabolic pathway change of proline, ABC transportprotein, proteasome and glutathione is relatively large; and the key biological enzyme expression quantities of acetyl-coa carboxylase (ACCase), beta-ketoacyl-ACP synthase I and II and the like are regulated upwards, so that the micro algae growth rate and the cell oil-enrichment capacity are effectively improved.

The invention relates to a method for preparing an indapamide sustained-release agent, and aims to enable the prepared indapamide sustained-release agent to have a better performance. The preparation process comprises the following steps: a, preparing the following materials in proportion: 0.5-2 percent of indapamide, 30-50 percent of a frame material, 14-28 percent of 100-mesh lactose, 20-35 percent of 200-mesh lactose, 10-20 percent of povidone K30 and 0.2-2 percent of lubricant; b, mixing the indapamide raw material and the lactose with two finenesses according to a gradient increasing method; c, mixing with the frame material and the povidone K30; d, adding the lubricant, and uniformly mixing; and e, tabletting. According to the method, a process of directly tabletting powder is adopted, so that the method has the advantages that the main drug is uniformly distributed in the tablet, the tablet has good uniformity (the uniformity index of a tablet with small content is needed to be controlled), influence of water and heating dryness caused by a traditional manufacture process on the quality of the main drug can be avoided in the manufacturing process, the production energy consumption can be reduced, and the production efficiency can be improved.

The invention provides a preparation method of cement graded broken stones for high-speed rail roadbeds. The method comprises the following steps: determining ratio of coarse and fine aggregates of the graded broken stones: weighing the graded broken stones which are more than 4.75mm as coarse aggregates, observing the CBR value change rule by adopting a single-particle size aggregate step-by-step filling mode and a method for respectively carrying out mechanical performance test on the CBR value to determine the final grading of different particle sizes of aggregates, taking the aggregates which are less than 4.75mm as fine aggregates, calculating the grading of the fine aggregates by adopting the K-value theory of the maximum density curve theory, and determining the ratio of the coarse and fine aggregates by using a method for measuring the CBR value in a quality gradient increasing manner; weighing and mixing different particle sizes of broken stones; by taking cement as a binding material and graded broken stones as aggregates, mixing the graded broken stones with the cement and water, compacting, molding and conserving, so as to obtain the cement graded broken stones. Compared with an existing method, the preparation method has the advantages that the broken stones for the roadbeds are relatively reasonable, the mechanical property is improved, and meanwhile, the resistance to shrinkage, the anti-fatigue load, the durability and the like are improved.

The invention discloses a blue-green light emitting diode. The light emitting diode includes an active region, the active region consists of multiple cycles of a low temperature front well layer, a quantum well, a cap layer and a quantum barrier which are successively generated from bottom to top, and each cap layer consists of a first cap layer, a second cap layer and a third cap layer, the firstcap layer, the second cap layer and the third cap layer having growth temperatures in gradient increase. An epitaxial method of the blue-green light emitting diode is also disclosed. According to thetechnical scheme, crystal qualities of the active region can be enhanced, and therefore, internal quantum efficiency can be improved effectively.