36results about How to "Asymmetrical" patented technology

The invention provides a cluster group calling key distribution method based on an asymmetric encryption system. The method includes the following steps that first, a group public key and a group private key are distributed to each cluster group; second, when a terminal initiates registration, the group private key of the cluster group which the terminal belongs to is acquired from an HLR; third, when the terminal initiates a cluster group encryption call, a cluster group calling key application message is sent to a key management center; fourth, the key management center generates a cluster group calling key, and the cluster group calling key is encrypted through the group public key of the cluster group which the terminal belongs to and then sent to all terminals in the cluster groups; fifth, the cluster group calling key is recovered after being decrypted by the terminal through the group private key belonging to the cluster group. The asymmetric group protection key is adopted for the method and does not need to be preset in terminal equipment, and thus the confidentiality is higher.

The invention relates to a preparation method of a Janus particle containing silicon dioxide with controllable particle size and asymmetrical degree. The preparation method comprises the following steps of adding silicon dioxide modified by a coupling agent, a first monomer, a hydrophilic monomer, a cross-linking agent, an emulsifying agent and deionized water into a reaction device; starting to stir; carrying out reflux condensation; leading nitrogen; warming to 50 to 80 DEG C; adding an initiating agent; polymerizing for 2.0 to 6.0h to obtain a seed emulsion; adding deionized water into the seed emulsion; starting to stir after ultrasonic dispersion; carrying out reflux condensation; leading nitrogen; adding a second monomer, and swelling for 10min to 60min at the room temperature; warming to 50 to 80 DEG C; adding an initiating agent; polymerizing for 1.0 to 5.0h; centrifugal separating and vacuum drying the emulsion to obtain the Janus particle containing the silicon dioxide. Compared with the prior art, according to the method provided by the invention, the technological process is simple, the particle size and the asymmetrical degree can be controlled, and the Janus particle is high in yield and easy for mass production.

An active matrix display device includes a pair of substrates, an optical modulation layer lying between the substrates, a plurality of pixel electrodes on one of the substrates, switching elements for driving the respective pixel electrodes provided in the vicinity of the pixel electrodes, and a reflective or transflective reflecting layer formed on at least one substrate more distant from a viewer side. The reflecting layer has asymmetrical reflection properties.

The invention refers to a transmitting method for SCSI interface net data isolation and switch, and the device. It includes a single-blade double-fling electronic switch which is isolates the net oneand the net two, the high-speed data interface which connects the net one with data isolating switch, a high-speed interface which connects the net two with the data isolating switch, the data bufferarea which stores and transfers the data of the net one or the net two, the core control machine which sends the control order to the data isolating switch, the data buffer area can transmits data with the net one and the net two, the two data interfaces are SCSI interface and applies to SCSI-2 or SCSI-3 criterion.

The invention discloses an adjustable-oil-temperature three-dimensional rib pipe oil cooler which comprises a shell. A liquid inlet header is arranged at the upper portion of the shell, and a liquid outlet header is arranged at the lower portion of the shell. The adjustable-oil-temperature three-dimensional rib pipe oil cooler is characterized in that multiple heat transfer pipes are connected between the liquid inlet header and the liquid outlet header and are three-dimensional rib pipes, and the three-dimensional rib pipes are outer three-dimensional rib pipes or inner three-dimensional rib pipes or inner and outer three-dimensional rib pipes; according to the outer three-dimensional rib pipes, multiple three-dimensional protruding units are arranged on the outer surfaces of the three-dimensional rib pipes; according to the inner three-dimensional rib pipes, multiple three-dimensional protruding units are arranged on the inner wall face of the three-dimensional rib pipes; according to the inner and outer three-dimensional rib pipes, multiple three-dimensional protruding units are arranged on the outer surfaces and the inner wall faces of the three-dimensional rib pipes; a partition plate is arranged in each of the liquid inlet header and the liquid outlet header; and a fan is arranged in the shell, an automatic air speed adjusting device is arranged in the fan, a temperature detection device is arranged at the position of an outlet of the liquid outlet header, and the temperature detection device is connected with the automatic air speed adjusting device. The adjustable-oil-temperature three-dimensional rib pipe oil cooler can be widely applied to the fields of energy, chemical engineering, refrigerating and the like.

The invention discloses a permanent magnet motor rotor, a permanent magnet motor and a processing method of the permanent magnet motor rotor, which relate to the technical field of motors. The permanent magnet motor rotor comprises a rotating shaft, a silicon steel sheet group and a plurality of magnetic shoes. The silicon steel sheet group sleeves the rotating shaft, the plurality of magnetic shoes are fixed outside the silicon steel sheet group at intervals along the circumferential direction of the silicon steel sheet group, two ends of each magnetic shoe in the circumferential direction are respectively and reversely arranged in an inclined manner relative to the axis of the magnetic shoe to form two diagonal planes, and the opposite diagonal planes of two adjacent magnetic shoes are arranged in parallel. Energy loss can be effectively reduced during operation of the permanent magnet motor, the overall production efficiency of the permanent magnet motor can be improved, and the production cost is reduced.

The invention discloses a method for gene editing of X chromosome multi-copy genes to realize animal sex control. By screening and selecting one or more multi-copy genes on the X chromosome of mammals as target sites, designing and synthesizing corresponding sgRNAs, and then By constructing a CRISPR / Cas9 expression system targeting multiple copies of the X chromosome to cut the X chromosome in mammalian sperm or fertilized eggs, the entire X chromosome can be inactivated, the X sperm can be killed, and the birth rate of male mammals can be improved. , or lethal XY embryos, increase the birth rate of female mammals. The method provided by the invention has high cutting efficiency of X chromosome, low off-target rate, and good sex control effect.

The invention discloses a method for preparing a one-dimensional magnetic nanowire for biochemical analysis, comprising the following steps: mixing 0.5-1.5 mol / L nickel chloride aqueous solution and ethylene glycol in a volume ratio of 1:8-10 Mixing is component A; sodium hydroxide and ethylene glycol are mixed in a weight ratio of 1-10:96, stirred, and hydrazine monohydrate is added until the concentration of hydrazine monohydrate is 0.05-0.3mol / L, namely as component B; then react component A with component B to form nickel nanowires, and then pass through SiO 2 The one-dimensional magnetic nanowires of the present invention are prepared by coating and amination or carboxylation. Compared with the magnetic microspheres in the prior art, the specific magnetization of the one-dimensional magnetic nanowires of the present invention has an order of magnitude improvement, high magnetic capture and separation efficiency, significantly increased specific surface area, and significantly enhanced detection sensitivity. In addition, it can also Provide multi-target markers and provide basic materials for the development of multi-marker simultaneous detection methods.

The invention provides a variable lateral force cavitator, which comprises a front-end tapered cavitator and a circular controlling element arranged behind the front-end tapered cavitator, wherein thecircular controlling element is divided into two to four lamellas; the joint of each lamella of the circular controlling element is provided with circular arc steel sheets mutually connected; the front-end tapered cavitator is internally provided with a movable element; the movable element consists of a tapered moving part and a cylindrical control stick; the tapered moving part and the cylindrical control lever are divided into lamellas of which the portion quantity is equal to that of the circular controlling element; and the cylindrical control lever controls the tapered part to transversely displace. The cavitator can control resistance coefficients and lift coefficients of the cavitator, can change the pitching force and the yawing force of navigating bodies, and has the advantages of strong maneuverability and simple structure.

The invention relates to an ultraviolet photodetector based on an MSM structure of a (AlxGa1-x)2O3 material and a preparation method thereof. The preparation method comprises steps: sapphire is selected as a substrate material; (AlxGa1-x)2O3 grows on the surface of the substrate material to form an optical absorption layer; a mask is adopted to form an asymmetric interdigital electrode on the surface of the optical absorption layer, and thus, preparation of the ultraviolet photodetector with the MSM structure is completed. Through the preparation method disclosed in the invention, the ultraviolet photodetector with a high Al component can be obtained, two optical band gaps can be generated, two ultraviolet spectral ranges can be sensed, detection of the same detector on two optical bands is facilitied, and utilization of the ultraviolet photodetector is improved.

The invention provides an organic electroluminescent device containing fluorene derivatives, and relates to the field of organic photoelectric technology. The organic electroluminescent device of the present invention comprises a fluorene derivative, and carbazole / indenocarbazole and its derivative groups are introduced into the fluorene derivative, thereby obtaining a series of compounds with higher glass transition temperature, so it has good thermal stability, and the organic electroluminescent device containing this type of compound also has good stability, so it has the advantage of long service life; at the same time, the compound provided by the invention has better hole mobility , a suitable HOMO energy level, and a higher triplet state energy level are conducive to hole transport and can effectively block the dissipation of excitons, which can significantly improve the luminous efficiency of the device.

The invention relates to a preparation method for a cross-linked sodium hyaluronate gel with an asymmetric structure. The method comprises the steps: adopting a sodium hyaluronate solution containing a cross-linking agent as a starting material, adding a precious small amount of the cross-linking agent, under conditions of constant temperature and constant humidity, carrying out gradient concentration dehydration, then dialyzing the cross-linked sodium hyaluronate gel in a buffer solution, dialyzing until the gel is no longer expanded, and finally, granulating to obtain the cross-linked sodium hyaluronate gel with the asymmetric structure. The cross-linked sodium hyaluronate obtained by the preparation method provided by the invention has the gradient asymmetric structure in microcosmic scale and shows the characteristics of dense exterior and loose interior; the structure ensures that the cross-linked sodium hyaluronate gel can effectively buffer attacking action of sodium hyaluronate enzymes, the survival time in bodies is greatly extended, and at the same time, excellent biological safety is also showed with precious small addition amount of the cross-linking agent.

The invention discloses a spirofluorene pyridine palladium nanoparticles and a preparation method thereof. The method is as below: adding a certain amount of metal salt solution into the organic ligand containing pyridine units, stirring for 1-3 h at a certain temperature, aging for 3-5 h, conducting centrifugal separation, washing and drying to obtain corresponding metal-ligand nanoparticles. The preparation process is simple, low in cost and suitable for mass production; and by using different solvents, controlling the amount of reactants, reaction time and temperature, the method achieves effective regulation on particle size and dispersion of spirofluorene pyridine palladium nanoparticles. The prepared spirofluorene pyridine palladium nanoparticles are functionalized nanoparticles containing palladium, have stable performance, can be used for the catalysis of C-C bond coupling reaction, and have high catalytic efficiency and yield reaching 90-99%. Therefore, the spirofluorene pyridine palladium nanoparticles have broad application prospects in the field of catalysis.

The invention discloses a preparation method of one-dimensional magnetic nanowires for biochemical analysis. The preparation method comprises the following steps of mixing 0.5mol to 1.5mol nickel chloride aqueous solution with ethylene glycol according to a volume ratio of 1:8-10, namely a component A; mixing sodium hydroxide and the ethylene glycol according to a weight ratio of 1-10:96 in proportion and stirring, adding hydrazine hydrate to hydrazine hydrate, wherein the concentration of hydrazine hydrate is 0.05-0.3 mol / L, namely a component B; and then reacting the component A with the component B to generate a nickel nanowire, carrying out coating and amination or carboxylation on the SiO2 to prepare the one-dimensional magnetic nanowire. Compared with magnetic microspheres in the prior art, the specific magnetization intensity of the one-dimensional magnetic nanowires is improved in order, the magnetic capture separation efficiency is high, the specific surface area is obviouslyincreased, the detection sensitivity is obviously enhanced, in addition, a multi-target marker can be provided, and a basic material for developing a multi-marker simultaneous detection method is provided.