11results about How to "Control growth" patented technology

The invention relates to the technical field of high polymer materials, in particular to a corrosion-resistant, aging-resistant and flame-retardant ETFE film and a preparation process thereof. The preparation process comprises the following steps: preparing the ETFE polymer; preparing modified polytetrafluoroethylene microsphere powder; preparing a dopamine modified polytetrafluoroethylene emulsion; and preparing the corrosion-resistant, aging-resistant and flame-retardant ETFE film. According to the preparation method disclosed by the invention, the polytetrafluoroethylene is modified by utilizing dopamine, after the emulsion is prepared, the surface of the ETFE film is covered with a layer of coating, the dopamine can spontaneously polymerize into polydopamine in a natural environment, the polydopamine has relatively good adhesion and can be firmly combined with the ETFE film, and the polytetrafluoroethylene and the ETFE film have similar structures and chemical characteristics, so that the preparation method has the advantages that the preparation method is simple, the cost is low, and the application prospect is wide. The ETFE film does not fall off after being tightly bonded for a long time, but the two films are gradually fused, so that the aging resistance of the ETFE film is improved.

The invention belongs to the technical field of semiconductor material preparation, and particularly relates to a system and a method for reducing the oxygen content of a Czochralski single crystal, after material melting, most gas in a single crystal furnace is distributed into a gas collecting cavity through a gas inlet part, the gas in the gas collecting cavity can be exhausted through a gas exhaust part, and the oxygen content of the Czochralski single crystal is reduced through a quartz gas exhaust system. The flow-out speed of gas in the single crystal furnace can be effectively controlled, so that the volatilization rate of Oi is controlled, the exhaust capacity of a vacuum pump is improved, more volatile O elements can be taken away, the O elements are prevented from flowing into the front edge of a solid-liquid interface, finally, the O content is reduced, the oxygen content in a single crystal silicon rod is stably controlled to be lower than 5 ppma, and the oxygen content of the single crystal silicon rod is reduced while the O content is controlled. When the gas collection cavity collects gas, radiant heat absorbed by the surface of the upper half part of the heat insulation assembly and heat brought by fluid flowing can be taken away through gas flowing, a more excellent temperature field is provided, and therefore nucleation and growth of defects in a crystal bar are controlled.

The invention discloses a copper alloy large-specification slab ingot internal structure control method which comprises the following steps: S1, according to the width and thickness size of a crystallizer, five first water inlets are formed in each of two width surfaces of the crystallizer, and one second water inlet is formed in each of two thickness surfaces of the crystallizer; s2, valves are mounted on the first water inlet and the second water inlet; s3, a flow divider is installed on the crystallizer, and four flow injection holes are formed in the bottom of the flow divider; s4, in the casting process, the flow of the copper alloy melt entering the flow divider is controlled, and it is guaranteed that the flow of four flow injection holes of the flow divider is consistent and uniform, and flow is not interrupted; and S5, after the copper alloy melt enters the crystallizer, under cooling of cooling water, the copper alloy melt is solidified in the direction from the inner wall of the crystallizer to the flow injection hole, and under downward traction of a casting machine, the copper alloy large-specification slab ingot is produced. The method can effectively solve the quality problems of surface cracking and orange peel of the rolled plate strip due to coarse grains of the internal structure of the copper alloy large-specification slab ingot and excessive growth of columnar crystals.

The embodiment of the present invention discloses a method and system for automatic merging of multidimensional models based on intelligent SQL parsing. Specifically, the following methods are included: converting the query statements into multiple logical execution plans through syntax parsing and semantic parsing in turn; performing a first classification on the multiple fact data tables corresponding to the multiple logical execution plans; performing a second classification on the association relationships of the fact data tables grouped as a group based on a greedy algorithm, and dividing all compatible logical execution plans into the same execution plan subgraph; appending a left outer join to the association relationships of the fact data tables in the execution plan subgraph, and clustering the execution plan subgraphs into the same existing model based on the left outer join; optimizing the existing cube set based on the clustered existing model. The present application solves the problem that the existing method cannot generate a unified model from semantically compatible SQL, that is, the association relationship of the tables in the model cannot be edited when recommending the model.

The subject invention provides devices and methods for alleviating discomfort associated with neuroma formation. The devices and methods of the invention effectively use the body's natural response of reconstructing implanted biomaterials to minimize the size of, isolate, and protect a neuroma. In preferred embodiments, the subject device is a cylindrical cap, wherein the internal chamber of the cylindrical cap physically partitions the nerve to enable an arrangement of nerve fibers (as opposed to haphazardly arranged nerve fibers often produced in neuromas). Tabs arranged on the outside of the cap can be used to manipulate the cap into place on a nerve. The open end can also be configured with flaps that can be used to widen the open end for easier insertion of the nerve into the cap. In addition, the cap's material remodels into a tissue cushion after implantation, which protects the neuroma from being stimulated and inducing pain.

The invention provides an eye protection lighting lamp capable of thickening choroid and further controlling eye axis growth, and relates to the field of lamps, the eye protection lighting lamp comprises a base plate, a supporting rod, a main lamp and a phototherapy lamp, the phototherapy lamp comprises a lamp shell, the lamp shell comprises an upper lamp shell and a lower lamp shell, a heat dissipation shell is arranged at the top of the upper lamp shell, and a lamp panel electrically connected with a main substrate in the main lamp is arranged in the heat dissipation shell; a plurality of 650nm red light lamp beads are arranged on the lamp panel, an inner lamp shell is arranged in the lower lamp shell, a lens is fixed on the inner lamp shell, a groove is formed in the position, located at the irradiation position of the red light lamp beads, of the top of the lens, a first convex lens is arranged at the bottom of the groove, a trapezoidal groove is formed in the bottom of the lens, and a second convex lens is arranged at the bottom of the trapezoidal groove. Through the design of an external phototherapy lamp lens structure, effective convergence of a light source is achieved, a 650nm red light lamp bead light source is converged to the periphery of the eyes of a user, the functions of thickening the choroid and further controlling the growth of the eye axis are achieved, and the eye nursing effect on the user is improved.

The present application aims to provide a kind of norepinephrine bitartrate injection capable of effectively controlling norepinephrine sulfonate and product color and its preparation method, the present application is by norepinephrine bitartrate as active ingredient and edetate disodium, L-cysteine, sodium chloride, hydrochloric acid and water as excipients, and its preparation method, a kind of norepinephrine bitartrate injection specifically includes the following ingredients: 20g norepinephrine bitartrate, 80g sodium chloride, 2.5-3.0g edetate disodium, 4.0-5.0g L-cysteine per 10000ml, the scheme of the present application can effectively control norepinephrine sulfonate impurity and other oxidative impurities and product color.

The invention discloses a high-transmissivity amorphous zinc nitride film and a preparation method thereof, and relates to the technical field of semiconductor film materials.The preparation method comprises the following steps that firstly, a quartz substrate is selected as a substrate, metal zinc is selected as a sputtering target material, the distance between the substrate and the target material is adjusted, and a vacuum cavity cover is covered; vacuumizing, heating the substrate, introducing nitrogen and argon into a vacuum cavity, and pre-sputtering the metal zinc in a radio frequency magnetron sputtering mode without opening a target baffle; opening a target baffle, performing radio frequency magnetron sputtering on the pre-sputtered metal zinc, and depositing a zinc nitride film on the substrate; and finally, carrying out cooling treatment to obtain the amorphous zinc nitride film. According to the high-transmissivity amorphous zinc nitride film and the preparation method thereof, key parameters such as sputtering air pressure are controlled within a specific range, the growth kinetics of the film is effectively regulated and controlled, and the average transmissivity of the prepared amorphous zinc nitride film in a visible-near infrared light region is as high as 73%-86.6%.

The present invention discloses a posterior sclera cross-linking device and a method for using the same, wherein the posterior sclera cross-linking device comprises an air bag, including a contracted state and an expanded state after inflation; a connecting tube, one end of which is connected to the air bag for providing gas to the air bag; an optical fiber, which is arranged along the connecting tube, and the output end of the optical fiber is arranged at the position of the air bag. The present invention has the advantages of easy operation and low damage.

The invention relates to the technical field of tea-oil tree planting, in particular to a method for preventing and controlling tea-oil tree corner beetles through physical measures. A method for preventing and controlling Camellia oleifera Abel beetles by physical measures comprises the following steps: S1, in the life cycle of Camellia oleifera Abel from November to December every year, loosening soil with the depth of 1cm in a circular area with the trunk as the center and the radius of 50cm at the root of each Camellia oleifera Abel, and then uniformly spreading 0.75-1.0 kg of Camellia oleifera shell powder on the loosened soil around the root; s2, turning the soil once in February to March of the next year. The invention provides a physical measure which is environment-friendly, low in cost and remarkable in effect, the method is used for preventing and controlling the oil-tea camellia culinaris beetles, meanwhile, the soil quality can be improved, the oil-tea camellia quality is improved, and the method has high practical value and popularization potential.

The invention discloses a method for detecting degraded impurities in ezetimibe atorvastatin calcium tablets, and belongs to the technical field of pharmaceutical analysis. The detection method comprises the following steps: mixing an acetic acid-ammonium acetate buffer solution with the concentration of 3.0-5.0 g / L and the pH value of 5.4-6.0 with acetonitrile to obtain a diluent; preparing a test sample solution by utilizing the diluent, and then determining the test sample solution by adopting a high performance liquid chromatography; chromatographic parameters are as follows: the sample introduction temperature is 2-8 DEG C; a chromatographic column takes phenylsilane bonded silica gel as a filling agent; a mobile phase A is a mixed solution of an acetic acid-ammonium acetate buffer solution and tetrahydrofuran, and a mobile phase B is a mixed solution of acetonitrile and tetrahydrofuran. The detection method disclosed by the invention can effectively control the increase of impurities in the solution, is high in specificity, high in precision and good in accuracy, and can effectively control the medicine quality of the ezetimibe atorvastatin calcium tablets.