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217results about How to "Tune performance" patented technology

Water-soluble polymer/graphene composite fiber as well as preparation method and application thereof

The invention relates to water-soluble polymer/graphene composite fiber as well as a preparation method and application thereof. The cross section of the fiber is special-shaped, the surface of the fiber is of an orientated micro-fiber-shaped structure, the strength of the fiber is greater than 100 MPa, the elongation at break is greater than 2%, and the conductivity of the fiber is greater than 0.1 S/cm. The preparation method comprises the following steps: preparing a composite spinning liquid, extruding into a coagulating bath for curing, drafting, leading out of the coagulating bath, drying, and coiling, thereby obtaining the water-soluble polymer/graphene composite fiber; and finally reducing by using a chemical or physical method, thereby obtaining the water-soluble polymer/graphene composite fiber. The cross section of the composite fiber provided by the invention is of a special-shaped structure, the surface of the fiber is of a rich groove micro structure, the strength and the toughness of the fiber are greatly improved when being compared with those of pure graphene fiber, and good conductivity is still maintained, so that the water-soluble polymer/graphene composite fiber has a wide application prospect in the fields such as anti-electrostatic and conductive fabrics, electromagnetic wave absorption and shielding fabrics, energy storage devices, sensors and water treatment.
Owner:DONGHUA UNIV

Communication equipment, communication system and method for controlling uplink transmission power

The invention discloses communication equipment, a communication system and a method for controlling uplink transmission power. In the embodiment of the invention, the method comprises the following steps of: obtaining load indication information of a plurality of base stations; calculating an adjusting value for adjusting the uplink transmission power according to the load indication information; and adjusting the uplink transmission power according to the adjusting value; or the method comprises the following steps of: obtaining a second interfering signal intensity threshold value of the plurality of base stations; and calculating the uplink transmission power according to second interfering signal intensity threshold value, wherein the second interfering signal intensity threshold value is obtained through each base station by adjusting the interfering signal intensity threshold value thereof according to the loading degree. Since the scheme provided by the invention takes the load indication information of the base stations into consideration while controlling the uplink transmission power, the problem that the uplink transmission power is not further adjusted when the loads of the base stations are too high is avoided. Therefore, the method can adjust the uplink transmission power of a terminal more correctly and improve the performance of the terminal in a covering surface of the base stations.
Owner:HUAWEI TECH CO LTD

High isotactic polypropylene alloy material and preparation method thereof

ActiveCN104761834AHigh modulusExcellent thermal creep resistancePolymer sciencePolyolefin
The invention discloses a high isotactic polypropylene alloy material and a preparation method thereof. The material contains 5-98.9 parts by weight of polybutylene, 1-80 parts by weight of polypropylene and 0.1-15 parts by weight of propylene-butene copolymer; the isotacticity of the high isotactic polypropylene is larger than 85%, and the smelting point of the high isotatic polypropylene is 115-129 DEG C; the isotacticity of the high isotactic polypropylene is larger than 85%, and the smelting point of the high isotactic polypropylene is 155-169 DEG C; the propylene-butene copolymer contains a random copolymer and a segmented copolymer of propylene-butene. The preparation method uses a titanium/vanadium supported catalyst and adopts a multistage sequential polymerization manner and specifically comprises the steps of carrying out propylene polymerization or butane-1 polymerization, then initiating butane-1 polymerization or propylene polymerization, and respectively carrying out propylene polymerization or butane-1 polymerization, and so on to synthesize the high isotactic polypropylene alloy material. The material is a powdery or spherical product, and has the advantages of excellent impact resistance, thermal creep resistance and low shrinking percentage of polybutylene, high modulus, high surface hardness and fast setting of polypropylene, and the like.
Owner:QINGDAO UNIV OF SCI & TECH +1

Production process of semi-hard soft copper belts

The invention discloses a production process of semi-hard soft copper belts. The process comprises a coarse rolling work procedure, an annealing work procedure, a middle rolling work procedure, an annealing work procedure, a fine rolling work procedure, a normal annealing work procedure, a cleaning work procedure, a bending pulling straightening work procedure, a cutting work procedure and a packing work procedure. Compared with the prior art, the production process has the advantages that the normal annealing is adopted. Compared with the low-temperature annealing process, the production process has the advantages that soft copper belt products can be obtained, in addition, the bending pulling straightening work procedure is added, the bending pulling straightening is mainly used for improving the belt form quality of hard belt materials, the process is equivalent to once rolling at an ultralow processing rate, and the belt materials can generate certain plastic deformation after the bending pulling straightening, so the products are processed into the semi-hard soft state from the soft-state processing, the product performance regulation is reached through controlling the elongation rate and the tension, the obtained copper belt products have uniform performance, in addition, the belt form quality of products is greatly improved, the product grade is improved, and the use requirements of customers are met.
Owner:ANHUI ZHONGYUAN NEW MATERIALS CO LTD
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