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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 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 2. Отображено 2.
02-05-2023 дата публикации

Movable valve element of proportional valve with extremely small friction force

Номер: CN116045026A
Автор: QIN XIAOYU, HUANG JINLEI, SHEN JINYU
Принадлежит:

The invention provides a movable valve element of a proportional valve with extremely small friction force, which comprises a movable valve element body, a plurality of ball grooves distributed in a spiral shape are formed in the outer wall of the movable valve element body, and a ball capable of moving in the ball groove is embedded in each ball groove. The movable valve element of the proportional valve with the extremely small friction force is simple in structure and ingenious in design, the friction force between the outer wall of the movable valve element and the inner wall of the valve body can be greatly reduced by optimizing the contact face between the outer wall of the movable valve element and the inner wall of the valve body from traditional face contact to ball point contact, and the clamping stagnation phenomenon is prevented.

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Номер записи: 1
30-06-2023 дата публикации

Block chain-based revocable distributed attribute-based encryption method

Номер: CN116366320A
Автор: MA HAIYING, YANG JIKUN, LI JINZHOU, YANG TIANLING, SHEN JINYU, HUANG SHUANGLONG, CAO DONGJIE
Принадлежит:

The invention provides a revocable distributed attribute-based encryption method based on a block chain, and belongs to the technical field of block chains, Internet of Things, data sharing and attribute-based encryption (ABE). The technical problem of privacy disclosure in an Internet of Things data sharing scene is solved. According to the technical scheme, the method comprises the following steps: S10, establishing a system; s20, initializing the authority; s30, user registration; s40, generating a user attribute private key; s50, encrypting the data; s60, performing data access; and S70, user attribute revocation. The beneficial effects of the invention are that the block chain and the distributed multi-authority ABE are utilized to realize fine-grained security sharing of the data of the Internet of Things, the forward and backward security of the shared data during attribute revocation is realized, and the efficiency of attribute revocation is improved.

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Номер записи: 2