47results about How to "Meet different performance needs" patented technology

The invention discloses a parallel repeated data deleting method. The method comprises the following steps that a client side firstly carries out block partitioning on data needing to be deleted again, the Hash fingerprint of each block is calculated according to a Hash function, and then the Hash fingerprints are sent to different re-deleting server nodes to carry out duplicate checking work of the fingerprints. If a certain fingerprint is confirmed to be a repeated fingerprint after comparison, only the metadata on a query server and a fingerprint counter on the re-deleting server nodes need to be updated. If a certain fingerprint is conformed to be a new data block through comparison, the data block is transmitted to a re-deleting server, and the metadata in a fingerprint database and the metadata in the query server are updated. The parallel repeated data deleting method has an expandability of re-deleting nodes, the needs of performance can be met by expanding different nodes according to different needs, the parallelism between multiple nodes is utilized to improve the performance of a re-deleting system effectively, and efficient and reliable services can be provided.

The invention provides a reinforcing and toughening polylactic acid material and a preparation method thereof, and relates to the field of polymer materials. The preparation method comprises the steps of mixing layered double hydroxides with epsilon-caprolactone and obtaining reactants, and after a ring opening polymerization, obtaining polycaprolactone modifier; conducting addition polymerization on the polycaprolactone modifier and diisocyanate, and obtaining prepolymer; making the prepolymer react with chain extender, and obtaining polyurethane modifier; melting and mixing the polyurethane modifier and polylactic acid, and obtaining the reinforcing and toughening polylactic acid material. Flexible chain segments of the polyurethane modifier improve the elasticity and flexibility of the material, rigid chain segments of the polyurethane modifier improve the strength and heat resistance of the material, and finally the overall mechanical property of the material is improved. Since the layered double hydroxides with a laminated structure are dispersed in a base material, the bending strength and stretching strength of the material are improved, and the anchoring effect of the material can avoid the modifier compatibility and migration problem which is easily generated from simple physical blending.

The embodiment of the invention provides a method for sending multi-user MIMO, which comprises the following steps of: acquiring coefficients corresponding to QoS of users according to the QoS of the users; performing power allocation on the users according to the coefficients corresponding to the QoS of the users and the characteristic of a channel matrix; sending a data vector subjected to the power allocation to a precoding processing module; and after being processed, sending the data vector by using N antennae. The embodiment of the invention also provides equipment for sending the multi-user MIMO. In the technical scheme provided by the invention, the technology of the power allocation is introduced to a MIMO system, and the matrix is processed in a combined way by taking the transformation of a power allocation algorithm on a signal and the transformation of a precoding algorithm on a channel into consideration comprehensively; and on the basis of realizing diversity gain, power resources are allocated reasonably to different users by the user QoS-based power allocation algorithm so as to meet the different performance requirements of the users.

The invention discloses a flexible and wholly transparent ZnMgO thin film transistor which takes Zn1-xMgxO alloy as a semiconductor film, 0<x<1 as a channel layer, n type ZnO doped with Ga as a grid electrode, a source electrode and a drain electrode, Al2O3 as a gate insulation layer, polyethylene terephthalate, polycarbonate, organic glass or polyethylene naphthalate organic polymer as a substrate and the radio frequency magnetron sputtering method as the manufacturing method. The thin film transistor of the invention has the advantages of small photosensitive degeneration, high migration rate, fast response speed, flexibility and good stability of performance.

The invention relates to the technical field of composite materials, in particular to a resin-based Ni-Co-Mn-In alloy composite material and a preparation method thereof. The resin-based Ni-Co-Mn-In alloy composite material consists of resin with the elastic modulus of 0.45Gpa and Ni45Co5Mn36.6In13.4 alloy with the particle size of 20-60 mum. A preparation method of the composite material comprises the following steps of: performing ball milling on a Ni-Co-Mn-In alloy material until the particle size of the Ni-Co-Mn-In alloy material is 20-60 mum, and uniformly mixing the Ni-Co-Mn-In alloy material with resin, wherein the alloy material accounts for 25-50 percent by volume of the composite material; stirring and mixing the mixture in a water bath of 60 DEG C for 20-40 minutes to obtain mixture slurry; and pouring the slurry into a mold, drying and curing to obtain a Ni45Co5Mn36.6In13.4 alloy material.

The invention discloses an ejector and a fuel cell hydrogen inlet adjusting and hydrogen-returning device applying the same. The ejector comprises a nozzle, a mixing chamber, an ejection sleeve, an inner sealing ring and a fastening screw, wherein the nozzle and the mixing chamber are arranged at the two ends of the ejection sleeve in a sleeving mode respectively; a notch is formed in the wall surface of the middle part of the ejection sleeve to serve as an inlet of a drainage fluid; a first flow channel is arranged in the middle of the nozzle and serves as a channel of a working high-pressurefluid; one end of the nozzle is provided with a high-pressure fluid inlet, and the other end of the nozzle is a high-pressure injection port; the mixing chamber is provided with a mixing section flowchannel and an expansion section flow channel; and the working high-pressure fluid ejected from the high-pressure injection port is mixed with the drained fluid flowed from the notch through the mixing section flow channel and then is ejected out after passing through the expansion section flow channel. The structure can adopt standardized and serialized design, and the part structure design is high in design and processing precision, high in interchangeability and low in cost, and the nozzle and the mixing chamber are replaced in a combined mode under the condition that the ejector sleeve isnot changed, so that different performance requirements can be met.

The invention provides a method for preparing a SiCp enhanced AZ91D composite material blank. The method comprises the following steps of: preparing a high-temperature binding agent; preparing a SiC particle precast block by adopting a wet method; drying and sintering the precast block; and extruding and impregnating to obtain the SiCp enhanced AZ91D composite material blank. The method for preparing the SiCp enhanced AZ91D magnesium-based composite material has the advantages of high automatic degree, stable and efficient process flow, excellent and reliable quality of blank and convenience for realizing scale production.

The invention discloses an application of a hemispherical Luneberg lens antenna, such as the application in satellite communication. The hemispherical Luneberg lens antenna is a hemisphere with radiusR and is designed to include n concentric layers, and the average dielectric constant epsilon(i) of the ith concentric layer is equal to 2-(ri / R)<2>, wherein n is an integer not less than 3, r1 is the radius of the center layer, rn=R, ri is the radius of the ith concentric layer, 1<=i<=n, and a cavity is distributed in at least one of the n concentric layers. The shape, size and distribution of the cavity structure of the hemispherical Luneberg lens antenna are adjustable and controllable. The average dielectric constant of the concentric layers can be precisely controlled. Different design requirements can be met. The hemispherical Luneberg lens antenna has a wide range of application. Moreover, there are a variety of materials which can be used, the production process is simple, the rate of finished products is high, there is no interlayer gap, and the product quality is more stable and reliable.

The invention discloses a strengthening and toughening heat treatment method of medium carbon manganese-vanadium low alloy steel, relating to a strengthening and toughening heat treatment method of low alloy steel. The method is used for solving the problems of low strength, bad toughness and incapability of simultaneously having both good strength and ductility and toughness of the medium carbon manganese-vanadium low alloy steel obtained by the traditional heat treatment technique. The method comprises the following steps: performing an austenitizing treatment on the medium carbon manganese-vanadium low alloy steel, and then, isothermal quenching the low alloy steel within a temperature section of 100-10 DEG C below a martensite transformation starting point Ms, holding for 60 s / mm according to the thickness of the medium carbon manganese-vanadium low alloy steel, and quenching the low alloy steel to the room temperature to finish the heat treatment of the medium carbon manganese-vanadium low alloy steel. The tensile strength of the obtained medium carbon manganese-vanadium low alloy steel is as high as 2060MPa, the yield strength is as high as 1540MPa, the ductility is as high as 15%, the percentage reduction of area is as high as 45%, and the low alloy steel has both high strength and plasticity, thereby being applicable to a strengthening and toughening heat treatment technique of medium carbon manganese-vanadium low alloy steel.

The invention provides a method of preparing precipitation method white carbon black by an improved dropwise adding process. The method comprises the following steps: preparing a base solution in a reaction kettle and controlling the content of water glass; controlling the stirring speed and the reaction temperature according to different generated products, spraying sulfuric acid from the bottomof the reaction kettle and spraying a water glass solution from the bottom or top of the reaction kettle till the water glass solution is sprayed over; raising the temperature, spraying sulfuric acidfrom the bottom of the reaction kettle, controlling the pH of the reaction system, and carrying out acidification and curing till the reaction is completed; and carrying out filter pressing, washing,pulpifying and drying on the obtained synthesized liquid to obtain the precipitation method white carbon black. Compared with an existing precipitation method, as white carbon black of different specifications is prepared by spraying sulfuric acid from the bottom and adding the water glass solution from the bottom or top, the specific surface areas and oil factors of different white carbon block products can be improved. In the production process, acidic emission is converted into neutral emission in tail gas emission, so that the product quality can be improved effectively, novel products aredeveloped, and the method is fully environment-friendly.

The invention discloses a super-power limiter MMIC based on bonding transfer and a preparation method thereof. The preparation method comprises: etching a PIN mesa structure and an upper electrode on the front side of a Si wafer; spin coating and adhering the front side of the Si wafer Bond the Si wafer with the front side of the temporary carrier; thin the Si wafer substrate; prepare the lower electrode on the back of the Si wafer; clean the thin layer of the PIN structure supported by the temporary substrate and the completed The SiC substrate prepared by the peripheral circuit; the thin layer of the PIN tube supported by the temporary substrate and the front side of the SiC substrate prepared by the peripheral circuit are bonded and interconnected; the temporary substrate is removed; the etching isolating the PIN mesa; the PIN The structure is interconnected with SiC circuits to obtain an ultra-high power limiter MMIC based on bonding transfer. The invention integrates the high-performance Si PIN limiter into the MMIC to realize the high-integration and high-power limiter MMIC.

Provided is a prop support strap for stage performers. The prop support strap comprises a vertical plate and a box body with an opening in the front side, wherein the box body is positioned in front of the vertical plate and fixedly connected with the vertical plate. A horizontal placing groove is formed in the front side of the vertical plate and positioned above the box body, the inner walls ofthe two sides of the placing groove are movably provided with first screw rods through bearings respectively, the opposite ends of the two first screw rods are fixedly connected through a connecting block, the threads of the two first screw rods are opposite, the inner walls of the upper and lower ends of the placing groove are provided with limiting grooves respectively, each first screw rod is matched with a first nut, and the first screw rods are in threaded fit with the first nuts. According to the prop support strap, adjustment can be carried out according to different shoulder widths ofthe performers, so that the performers feel more comfortable when wearing the prop support strap; moreover, different wings can be replaced according to different performance demands, and the performance demands are met.

The invention provides a rhamnolipid derivative as shown in a formula (I). The invention also provides a preparation method and application of the rhamnolipid derivative. The invention further provides a daily chemical product containing the rhamnolipid derivative. According to the rhamnolipid derivative provided by the invention, an organic silicon chain segment with a certain length is introduced into rhamnolipid, so that the rhamnolipid derivative can be effectively compatible with silicone oil, various properties such as smell, emulsifying capacity and the like of the rhamnolipid are obviously improved, and the variety and the application range of the rhamnolipid are greatly expanded. The rhamnolipid derivative provided by the invention can be applied to a variety of daily chemical products, especially cleaning wash supplies. The preparation method of the rhamnolipid derivative provided by the invention is simple and convenient in process, free of high cost and suitable for industrial production, thereby having important economic and social values;

A bainite isothermal heat treatment method of medium-carbon silicomanganese nickel-chromium-series low-alloy steel aims to solve a problem that performance requirements of some key components cannot be satisfied since yield strength is significantly low when a temper temperature is lower than an isothermally quenching temperature in a conventional isothermal heat treatment technology. The method includes following steps: performing austenitizing treatment to the medium-carbon silicomanganese nickel-chromium-series low-alloy steel; carrying out isothermal oil-quenching or isothermal gas-quenching at a temperature which is higher than a martensite transformation temperature by 5-60 DEG C with the temperature being maintained for 120-180 min; and performing tempering at a temperature which is higher than an isothermal quenching temperature by 10-60 DEG C for 30-150 min. Through treatment by the method, the medium-carbon silicomanganese nickel-chromium-series low-alloy steel has a tensile strength reaching 1590-1980 MPa, a yield strength reaching 1350-1770 MPa and a ductility being 14-25%.

The invention discloses a manufacturing method of a hemispherical Lunberian lens antenna. The hemispherical Lunberian lens antenna is distributed with cavities, has a hemispherical surface and a bottom plane, and the bottom plane is a plane passing through the center of the sphere; it is characterized in that the Described method comprises the steps: (1) select the material that is used to manufacture hemispherical Lunberg lens antenna; (2) determine the structural parameter of hemispherical Lunberg lens antenna; (3) make the hemispherical Lunberg lens antenna with described structural parameter A three-dimensional digital model; and (4) manufacturing the hemispherical Lunberg lens antenna according to the three-dimensional digital model by using an additive manufacturing method; and (5) pasting a metal foil layer on the bottom plane. The shape, size and distribution of the cavity structure in the hemispherical Lunberg lens antenna produced by the present invention are adjustable and controllable, which realizes the precise control of the average dielectric constant of the concentric layer and can meet different design requirements; and the production materials are widely used , The production process is simple, the yield is high, and there is no gap between layers, which makes the product quality more stable and reliable.

The invention discloses a high-strength and high-toughness heat treatment method of medium-carbon silicon-manganese-chromium-nickel series low alloy steel, relating to a high-strength and high-strength heat treatment method of low alloy steel and aiming at solving the problem that the medium-carbon silicon-manganese-chromium-nickel series low alloy steel treated by a traditional heat treatment process cannot simultaneously obtain excellent strength, ductility and toughness. The high-strength and high-toughness heat treatment method comprises the following steps of: 1, carrying out austenitizing treatment on the medium-carbon silicon-manganese-chromium-nickel series low alloy steel, and then carrying out isothermal quenching to finish primary heat treatment; and 2, carrying out isothermal quenching on the medium-carbon silicon-manganese-chromium-nickel series low alloy steel subjected to the primary heat treatment in the step 1, and finally quenching to room temperature. The medium-carbon silicon-manganese-chromium-nickel series low alloy steel treated by using the method disclosed by the invention has the tensile strength of 1580MPa-2000MPa, the yield strength of 1340MPa-1870MPa, the ductility of 9.0-22.9 percent and the percentage reduction of area of 16.0-43.2 percent. The high-strength and high-toughness heat treatment method can be used for heat treatment of the medium-carbon silicon-manganese-chromium-nickel series low alloy steel.