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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 3. Отображено 3.
29-08-2023 дата публикации

Aviation accident report cross-language retrieval classification method

Номер: CN116662549A
Автор: ZHOU QINGQING, ZHANG SHIWEN, YI HAN, JIA BO, REN TENGFEI, HUO ZHIMEI, SUN YANJIN, HUANG ZHEN, QU CHUNJIN, ZHANG ZHIPENG
Принадлежит:

The invention discloses a cross-language retrieval and classification method for aviation accident reports, which realizes cross-language retrieval and classification of aviation accident reports and provides information support for searching similar accident reports in the aviation field. According to the technical scheme, a bilingual text similarity label data set in the aviation field is constructed based on an aviation accident report database; training a bilingual text similarity data set in the aviation field by adopting an SBERT pre-training model, and performing model fine tuning and evaluation; based on an aviation accident report database, adopting Chinese information classification tags to construct a bilingual multi-level multi-tag data set in the aviation field; performing classification training on a bilingual multi-layer multi-label data set in the aviation field by adopting a BERT pre-training model, and performing model fine tuning and evaluation; in an actual application ...

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Номер записи: 1
04-01-2012 дата публикации

Preparation and use of aromatic heterocyclic methylene BOZ

Номер: CN0101585834B
Автор: FU BIN, SUN YANJIN, LIU LEI, YU YANBO, ZHENG ZHONGBO, BIN FU, YANJIN SUN, LEI LIU, YANBO YU, ZHONGBO ZHENG
Принадлежит:

The invention discloses a preparation and use of aromatic heterocyclic methylene BOZ, belonging to the organic synthesis field. The BOZ can synthesize the aromatic heterocyclic methylene BOZ with the structure containing the chiral five-membered heterocycle ethenyl obtained by four reaction steps of hydrolytic decomposition, acylation, amidation and annulation with 2-heterocyclic diarylethene-1, 1-ethylene dicarboxylic acid or derivatives thereof as raw materials. The BOZ is easy to prepare, has good catalysis performance, can combine with the transient metal to form a complex compound catalyst, is used for catalyzing the asymmetric Friedel-Crafts reaction and cyclopropane reaction and so on.

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Номер записи: 2
25-11-2009 дата публикации

Preparation and use of aromatic heterocyclic methylene BOZ

Номер: CN0101585834A
Автор: FU BIN, SUN YANJIN, LIU LEI, YU YANBO, ZHENG ZHONGBO, BIN FU, YANJIN SUN, LEI LIU, YANBO YU, ZHONGBO ZHENG
Принадлежит:

The invention discloses a preparation and use of aromatic heterocyclic methylene BOZ, belonging to the organic synthesis field. The BOZ can synthesize the aromatic heterocyclic methylene BOZ with the structure containing the chiral five-membered heterocycle ethenyl obtained by four reaction steps of hydrolytic decomposition, acylation, amidation and annulation with 2-heterocyclic diarylethene-1, 1-ethylene dicarboxylic acid or derivatives thereof as raw materials. The BOZ is easy to prepare, has good catalysis performance, can combine with the transient metal to form a complex compound catalyst, is used for catalyzing the asymmetric Friedel-Crafts reaction and cyclopropane reaction and so on.

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Номер записи: 3