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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Применить Всего найдено 4. Отображено 4.
04-04-2023 дата публикации

Efficient halogen-free flame retardant method for nylon 6 glass fiber reinforced material

Номер: CN115895247A
Принадлежит:

The invention provides an efficient halogen-free flame retardant method for a nylon 6 glass fiber reinforced material. The efficient halogen-free flame retardant method comprises the following steps: a glass fiber surface treatment step: adding short glass fibers into a double-cone drying machine; adding 0.5-2.5 parts of 3-imidazolyl propyl methyl dimethoxy silane according to the weight of the glass fiber, and fully mixing for 1-2 hours; raising the temperature to 100-120 DEG C, and keeping the temperature for 1-2 hours; cooling to 60 DEG C or below, and discharging to obtain treated fibers; and preparing the flame-retardant glass fiber reinforced nylon 6 composite material. According to the glass fiber treated by the imidazole functional group, the flame retardant grade and the mechanical property can be obviously improved, and the imidazole functional group on the surface of the glass fiber and the flame retardant in the matrix resin have a good synergistic effect.

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23-06-2023 дата публикации

Secondary threshold signature method and device for level-to-level management

Номер: CN116318736A
Принадлежит:

The invention discloses a secondary threshold signature method and device for hierarchical management, and the method comprises the steps: obtaining a to-be-signed file M, and configuring a role participating in signature; the trusted center D selects parameters for the to-be-signed file M; selecting signers, and signing the to-be-signed file M by each signer by using the respective corresponding sub-key; the signature organizer C receives the signature result of each signature person on the to-be-signed file M, and verifies the compliance of the signature result; synthesizing each verified signature result, signing the synthesized signature result by using a private key Dc of the signature organizer C to obtain a final signature result, and issuing the final signature result to a signature receiver; and the signature receiver verifies the signature compliance of the signature organizer C based on the public key Ec of the signature organizer C, and verifies the signature compliance of each ...

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02-07-2014 дата публикации

Anti-counterfeiting pattern manufacturing method and product with anti-counterfeiting pattern

Номер: CN103895379A
Принадлежит:

The invention discloses an anti-counterfeiting pattern manufacturing method and a product with an anti-counterfeiting pattern. The manufacturing method includes: printing the anti-counterfeiting pattern on a preset base layer. The anti-counterfeiting pattern at least comprises a first pattern part and a second pattern part, wherein the first pattern part is printed by using first material, and the second pattern part is printed by using second material; in a visible light range, the color, observing through a light filter piece, of the first pattern part is different from the color, under visible light, of the first pattern part, and the second pattern part is invisible; under infrared radiation, the first pattern part is invisible, and the second pattern part is visible. By the different visual effects of the pattern parts under different observation conditions, the anti-counterfeiting performance of the anti-counterfeiting pattern can be increased.

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15-07-2015 дата публикации

Preparation method of high performance environment-friendly conductive coating

Номер: CN104774512A
Принадлежит:

The invention discloses a preparation method of high performance environment-friendly conductive coating, and belongs to the technical field of conductive coating. The environment-friendly conductive coating is prepared by dissolving environment-friendly polyvinyl butyral resin serving as a matrix with excellent adhesive force and mechanical property and carbon powder serving as conductive filler with efficient electrical conductivity in a solvent. The prepared conductive coating has mechanical property and electrical conductivity. The electrical conductivity of the obtained high performance environment-friendly conductive coating doped with graphite and carbon black is 41.617*10<-3>S/cm, and the adhesive force of the conductive coating reaches 0-1 level. Compared with the prior art, the high performance environment-friendly conductive coating has the advantages that the manufacturing cost of the conductive coating is very low, the preparation method is simple, few additives are added, ...

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