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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 7. Отображено 7.
21-07-2010 дата публикации

Picture coding method based on human eye visual characteristic

Номер: CN0101783939A
Автор: WEI FU, XIAODONG GU, CHENGCAI MA, FU WEI, GU XIAODONG, MA CHENGCAI
Принадлежит:

The invention belongs to the technical field of image processing, relating to a picture coding method based on human eye visual characteristics. According to the visual characteristic that human eyes are more sensitive to picture edge and smooth region information distortion than texture region distortion, the invention firstly carries out wavelet decomposition to an original picture; then, a coefficient after wavelet transform is classified by entropy and variance into a visual important coefficient and a common coefficient; and finally, arithmetic coding is adopted to classify and code different coefficients to obtain a final code stream. The invention improves the subjective visual quality of a lossy compression reconstruction picture to ensure that the recovered picture has better visual observation effect after the original picture is performed with lossy compression coding with high compression ratio, and thus, the invention has strong feasibility on large-scale picture storage and ...

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Номер записи: 1
14-04-2023 дата публикации

Emergency processing method, device and system for service system

Номер: CN115967640A
Автор: WANG DAWEI, HAO ZHIJUN, MA CHENGCAI
Принадлежит:

The invention provides an emergency processing method, device and system for a service system, and relates to the technical field of emergency management. The terminal device obtains a first emergency request, wherein the first emergency request comprises a to-be-searched condition and a to-be-selected emergency type; the terminal equipment inquires and obtains a service system associated with the to-be-searched condition according to the first emergency request; and the terminal equipment generates a second emergency request carrying the service system and the emergency type to be selected, and sends the second emergency request to the first server, so that the first server executes a processing operation corresponding to the emergency type to be selected on the service system. On the basis of the method, a user does not need to input a large number of complex computer commands and parameters in the terminal equipment, so that the quickness and the efficiency are effectively improved, ...

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Номер записи: 2
07-04-2023 дата публикации

Brake beam maintenance transmission device

Номер: CN115924418A
Автор: LI YUAN, ZHANG TAO, LYU JUN, MA CHENGCAI, ZHANG YANRU, XU JUMEI, LI YI, WU MINGQIAN, GAO XINRONG
Принадлежит:

The invention relates to the field of brake beam detection and transportation equipment, in particular to a brake beam maintenance transmission device. Comprising a transportation frame, a supporting frame, a storage frame and a power unit. The bearing frame is arranged on the transportation frame in a sliding mode through the power unit. The power unit is used for driving the bearing frame to move in the length direction of the conveying frame. The storage rack is rotationally connected to the bearing rack, and the brake beam is fixed to the side, away from the bearing rack, of the storage rack; when the brake beam is detected, the storage rack is rotated, the storage rack drives the brake beam to rotate, and the other side, which is not detected, of the brake beam is rotated to the detection position of a worker, so that the brake beam can be comprehensively detected only by arranging the worker on one side, and the detection cost of the brake beam is reduced.

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Номер записи: 3
22-08-2012 дата публикации

Picture coding method based on human eye visual characteristic

Номер: CN0101783939B
Автор: WEI FU, XIAODONG GU, CHENGCAI MA, FU WEI, GU XIAODONG, MA CHENGCAI
Принадлежит:

The invention belongs to the technical field of image processing, relating to a picture coding method based on human eye visual characteristics. According to the visual characteristic that human eyes are more sensitive to picture edge and smooth region information distortion than texture region distortion, the invention firstly carries out wavelet decomposition to an original picture; then, a coefficient after wavelet transform is classified by entropy and variance into a visual important coefficient and a common coefficient; and finally, arithmetic coding is adopted to classify and code different coefficients to obtain a final code stream. The invention improves the subjective visual quality of a lossy compression reconstruction picture to ensure that the recovered picture has better visual observation effect after the original picture is performed with lossy compression coding with high compression ratio, and thus, the invention has strong feasibility on large-scale picture storage and ...

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Номер записи: 4
21-07-2010 дата публикации

Power electronic system fault diagnostic method based on Gradation-boosting algorithm

Номер: CN0101782625A
Автор: FU WEI, GU XIAODONG, MA CHENGCAI, WEI FU, XIAODONG GU, CHENGCAI MA
Принадлежит:

The invention discloses a power electronic system fault diagnostic method based on the Gradation-boosting algorithm. Firstly, the simulation model of a three-phase power inverter circuit is built; according to the practical situation, the fault condition of the system is simulated to obtain various fault samples; all samples are divided into different grades according to the occurrence frequency of the practical fault; the samples serve as learning samples to repeatedly train a neural network; and finally, the well-trained neural network is integrated into a whole high-performance fault diagnostic system by the Gradation-boosting algorithm. The invention can improve the fault detection precision rate of the power electronic fault diagnostic system and lowers the loss of a practical application system due to missed detection and false detection.

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Номер записи: 5
14-04-2023 дата публикации

Electronic equipment

Номер: CN115963901A
Автор: MA CHENGCAI, LI YUEMING
Принадлежит:

The invention provides electronic equipment. The electronic equipment comprises a shell, a circuit board and an expansion module, wherein the circuit board and the expansion module are located in the shell. The circuit board is arranged on the bottom wall of the shell, the extension module is connected with the side wall of the shell, and the extension module is suspended above the bottom wall of the shell. Through the arrangement mode, the extension module does not need to be in direct contact with the bottom wall of the shell, the circuit board can extend to the position below the extension module, the occupied space of the mainboard can be effectively increased, the reasonability of the internal space layout of the electronic equipment is improved, and therefore the space utilization rate of the electronic equipment is effectively increased; and the miniaturization design requirement of electronic equipment is met.

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Номер записи: 6
04-01-2012 дата публикации

Power electronic system fault diagnostic method based on Gradation-boosting algorithm

Номер: CN0101782625B
Автор: FU WEI, GU XIAODONG, MA CHENGCAI, WEI FU, XIAODONG GU, CHENGCAI MA
Принадлежит:

The invention discloses a power electronic system fault diagnostic method based on the Gradation-boosting algorithm. Firstly, the simulation model of a three-phase power inverter circuit is built; according to the practical situation, the fault condition of the system is simulated to obtain various fault samples; all samples are divided into different grades according to the occurrence frequency of the practical fault; the samples serve as learning samples to repeatedly train a neural network; and finally, the well-trained neural network is integrated into a whole high-performance fault diagnostic system by the Gradation-boosting algorithm. The invention can improve the fault detection precision rate of the power electronic fault diagnostic system and lowers the loss of a practical application system due to missed detection and false detection.

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Номер записи: 7