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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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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 6. Отображено 6.
16-05-2023 дата публикации

OFDM (Orthogonal Frequency Division Multiplexing) channel estimation method adopting pre-activated residual unit and super-resolution network

Номер: CN116132239A
Автор: LI JUN, WANG RONG, GAO HE, ZHENG XUEHAN, ZHANG ZHICHEN, WANG YUKAI, YUAN YAWEI, ZHENG WENJING, HE BO
Принадлежит:

The invention relates to the technical field of communication, in particular to an OFDM (Orthogonal Frequency Division Multiplexing) channel estimation method adopting a pre-activated residual unit and a super-resolution network. Firstly, OFDM system channel estimation is carried out by adopting a super-resolution network PResNet with fewer convolution filters, a channel matrix obtained at a pilot frequency by adopting a least square channel estimation method is regarded as a pixel point on a low-resolution image, and then a mapping relation in the channel matrix is learned by using the proposed super-resolution network, so that the channel estimation of the OFDM system is realized. And finally, a high-resolution image, namely an accurate and complete channel matrix, is obtained through the interpolation layer. In addition, channel estimation is carried out on a super-resolution network FullPResNet combining a pre-activated residual unit and dense connection, the dense connection is applied ...

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Номер записи: 1
11-02-2015 дата публикации

Control method and device of maximum wind energy capture in off-grid wind power generation

Номер: CN104343627A
Автор: QI BAOLIANG, WEN PENG, GAO HE, LI CHENGDONG, ZHENG XUEHAN
Принадлежит:

The invention discloses a control method and device of maximum wind energy capture in off-grid wind power generation. The method includes: non-speed-measuring control mode, a compound filter mode, intelligent control based on a self-adjusting function and output power optimization algorithm. The device comprises a wind rotor, a permanent magnet direct-driven generator, a rectifier bridge, a boost power converter, a controller and a load. The control method and device has the advantages that maximum wind energy can be quickly captured under wind speed fluctuation, dynamic response speed is higher, stable-state search precision is better, unit output power is optimized, wind energy utilization rate is increased, and operational safety and stability of a unit is guaranteed.

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Номер записи: 2
25-07-2023 дата публикации

Expressway comprehensive energy management and control system scheduling method, device, equipment and medium

Номер: CN116488140A
Автор: ZHENG XUEHAN, LU YOUFU, WEI KAI, YAN GUOCUI, LIU XUEFEI, GAO HE, FENG YAWEI, DING XIAOYING
Принадлежит:

The invention belongs to the technical field of comprehensive energy management and control, and particularly provides a highway comprehensive energy management and control system scheduling method, device, equipment and medium, and the method comprises the following steps: predicting photovoltaic output and power load prediction values according to weather factors; based on the predicted photovoltaic output and power load predicted values, establishing an optimal scheduling model by taking the maximum daily operation income and the minimum carbon emission as targets; solving the day-ahead optimal output of the optimization scheduling model by using an optimization algorithm; updating the predicted photovoltaic output and the power load predicted value next day, and adjusting the output of the energy storage battery and the commercial power; a next-day optimal output plan is obtained in combination with constraint conditions; and scheduling according to the calculated optimal output plan ...

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Номер записи: 3
04-04-2023 дата публикации

Deep learning and index modulation combined OFDM (Orthogonal Frequency Division Multiplexing) signal detection method

Номер: CN115913864A
Автор: LI JUN, ZHANG ZHICHEN, GAO HE, ZHENG XUEHAN, HE BO, WANG YUKAI, WU BAOHANG, FU WENWEN, SUN HAOTIAN, WANG JINGHAN, YANG TIANCI
Принадлежит:

The invention relates to the field of communication, and discloses a deep learning and index modulation combined OFDM (Orthogonal Frequency Division Multiplexing) signal detection method, which is applied to a signal detection technology based on index modulation, reduces ICI (Inter-Carrier Interference) and PAPR (Peak to Average Power Ratio) in an OFDM system, improves the signal demodulation performance of a receiving end and effectively enhances the signal detection capability. The method comprises the following steps: firstly, building an OFDM-IM system framework, randomly generating a bit sequence, a Rayleigh channel and additive white Gaussian noise by using the OFDM-IM system framework, preprocessing data, and generating a data set required by a deep learning model; secondly, offline training is carried out on the obtained data set through a four-layer full-connection neural network, and a deep learning model adopts a leakyrelu activation function, an Adam optimizer and a user-defined ...

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Номер записи: 4
04-08-2023 дата публикации

Complex scene video question-answering method and system for cloud service robot

Номер: CN116541490A
Автор: ZHOU FENGYU, LIU JIN, FAN CHONGFENG, CHEN JIANYE, ZHENG XUEHAN, YAN GUOCUI
Принадлежит:

The invention belongs to the technical field of service robot video questioning and answering, and provides a complex scene video questioning and answering method and system for a cloud service robot. The complex scene video question and answer method comprises the following steps: obtaining question text information and a complex scene video as to-be-queried information interaction data; extracting all verbs and nouns from the question text information, and extracting object action information and object static information from the to-be-interacted video data; fusing the verb and the object action information to obtain video frame features; fusing nouns and object static information to obtain behavior action features; performing comparative learning on the two features of the video frame feature and the behavior action feature and a prior data set, matching text information from the prior data set and positioning video frame information, and performing multi-modal fusion to obtain a fusion ...

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Номер записи: 5
01-08-2023 дата публикации

Object-level semantic SLAM construction method and system

Номер: CN116524137A
Автор: ZHOU FENGYU, WANG MINXIN, XUE BINGXIN, XIA YINGXIANG, HOU BINGSHEN, YIN LEI, SHI LUCHUAN, ZHENG XUEHAN, GAO HE
Принадлежит:

The invention belongs to the technical field of positioning and navigation, and particularly relates to an object-level semantic SLAM (Simultaneous Localization and Mapping) construction method and system. The object-level semantic SLAM construction method comprises the following steps: performing instance segmentation on an obtained image, and extracting spatial points of an object contained in the image; calculating the position of the object according to the spatial point of the object, and decoupling the position, the size and the rotation angle of the object; on the basis of the position, the size and the rotation decoupling data, dimension reduction is carried out by using vertical projection to estimate parameters of an object, and convex hulls of spatial points are extracted to carry out single-frame initialization of an ellipsoid of the object; on the basis of single-frame initialization of the ellipsoid of the object, dynamically selecting an axis alignment bounding box or a direction ...

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Номер записи: 6