Настройки

Укажите год
-

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

Подробнее
-

Мониторинг СМИ

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

Подробнее

Форма поиска

Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Ведите корректный номера.
Укажите год
Укажите год
Применить Всего найдено 2. Отображено 2.
19-05-2010 дата публикации

Measuring system and method of work frequency of HEMT device of ultra-fast triode

Номер: CN0101710155A
Автор: Bian Jinxin, Chen Lin, Jia Xiaoxuan, Peng Yan, Yuan Minghui, Zhu Yiming
Принадлежит:

The invention discloses measuring system and method of the work frequency of an HEMT device of an ultra-fast triode. The measuring method comprises the following steps of: entering pump light between a grid electrode and a source electrode to instantaneously change an electric field of the grid electrode, and probing a space electromagnetic wave irradiated by electronic motion between the source electrode and a drain electrode caused by sudden change of the electric field of the grid electrode through electro-optic sampling; calculating by using a maxwell equation to obtain the relation of the acceleration of the electron and the electromagnetic wave radiated by the motion to calculate an unbalanced dynamic motion process of the electron between the source electrode and the drain electrode, and obtain relaxation time of the unbalanced dynamic motion process of the electron through the probed unbalanced dynamic motion process of the electron from the source to the drain so as to obtain the ...

Подробнее
Номер записи: 1
04-04-2023 дата публикации

Progressive out-of-focus lens combining microsphere array based on free-form surface and Fresnel lens

Номер: CN115903268A
Автор: TIAN MIAO, JIA XIAOXUAN, ZHU HONG
Принадлежит:

A progressive out-of-focus lens combining a microsphere array based on a free-form surface with a Fresnel lens comprises a lens body, the concave surface of the lens body is the free-form surface, the center of the convex surface of the lens body is a circular area, the circular area is a free-form surface, and an overlapping layer extending towards the edge of the lens is arranged on the convex surface around the circular area. The superposed layer is attached to the convex lens substrate layer, a plurality of concentrically distributed aspheric micro lens ring belts and Fresnel lens ring belts are alternately arranged in the superposed layer along the radial direction of the lens, the aspheric micro lenses in the same aspheric micro lens ring belt have the same diopter, and the aspheric micro lenses in different ring belts have different diopters. The diopters of the Fresnel lenses in different ring bands are different, and the diopters of the aspheric micro lenses and the diopters of ...

Подробнее
Номер записи: 2