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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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Применить Всего найдено 7. Отображено 7.
01-12-2017 дата публикации

Error correction code system and method applied to self-adaptive LDPC codes in flash memories

Номер: CN0107423161A
Автор: GAO MEIZHOU, SUN DAPENG, GUO TAI
Принадлежит:

The invention discloses an error correction code system and method applied to self-adaptive LDPC codes in flash memories, and aims at improving code correction ability of error correction codes in the flash memories, protecting stability of stored data and improving service life of the flash memories. According to the method, LDPC codes are changed into self-adaptive encoding and decoding, so that adaptation of flash memory storage controllers is improved, error correction ability of the flash memory storage controllers is greatly strengthened and service life of the flash memories is prolonged at the same time.

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Номер записи: 1
21-07-2010 дата публикации

Circuit of oscillograph for displaying poincare section

Номер: CN0101782599A
Автор: CHEN HONG, DING QUN, GAO MEIZHOU, HONG CHEN, QUN DING, MEIZHOU GAO
Принадлежит:

The invention provides a circuit of an oscillograph for displaying poincare section, which is capable of displaying the poincare section of a nonlinear system in a three dimensional space. The circuit comprises an analog-to-digital conversion circuit, a waveform conversion circuit, a switching circuit and an interference reduction circuit. The analog-to-digital conversion circuit is connected with the waveform conversion circuit which is connected with the switching circuit, and the switching circuit is connected with the interference reduction circuit. A control signal Vz controls two multiplier units at the same time; the other input ends of the two multiplier units are respectively switched to a Vx signal and a Vy signal; Vx and Vy multiply with Vz to reach the purpose of reducing the interference; and a Vxx signal and a Vyy signal with better effect can be produced. After the Vxx signal and Vyy signal are sent to the oscillograph, the poincare section can be displayed. The invention ...

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Номер записи: 2
28-04-2023 дата публикации

Data management method and system of hard disk, computer equipment and storage medium

Номер: CN116027972A
Автор: FU FENGZHI, GAO MEIZHOU, LIU MINZHAI, YANG YONGJUN, BU LINGMEI
Принадлежит:

The invention relates to the technical field of storage, in particular to a data management method and system for a hard disk, computer equipment and a storage medium. The method comprises the following steps: when the hard disk is powered on, correcting hard disk data retention time of the hard disk; updating the corrected hard disk data retention time according to an updating period; when the data block of the hard disk executes the first writing operation, marking the block data retention time of the data block executing the first writing operation based on the updated hard disk data retention time; when the data blocks are fully written, adding the fully written data blocks into a holding queue and carrying out routing inspection on the data blocks in the holding queue; and if the block data retention time of the polled data block triggers a preset condition, recovering the polled data block, and removing the polled data block from the retention queue. By means of the scheme, correction ...

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Номер записи: 3
06-06-2023 дата публикации

Closed-loop detection method and system, training method and system, electronic equipment and storage medium

Номер: CN116222577A
Автор: YU XIANG, GUO TAI, GAO MEIZHOU
Принадлежит:

The invention relates to the technical field of data processing, and discloses a closed-loop detection method, a training method, a system, an electronic device and a storage medium, and the method comprises the steps: obtaining environment data, inputting the environment data into a multi-modal site representation network, and calculating the environment data through the multi-modal site representation network to obtain a first global site representation vector; adding the environment data and the first global location representation vector into a historical frame data sequence; calculating an Euclidean distance between the first global location representation vector and a second global location representation vector in the historical frame data sequence; and acquiring a minimum Euclidean distance from the calculated Euclidean distances, and judging whether a closed loop is found or not based on whether the minimum Euclidean distance is smaller than a distance threshold value or not. Through ...

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Номер записи: 4
21-09-2011 дата публикации

Circuit of oscillograph for displaying poincare section

Номер: CN0101782599B
Автор: CHEN HONG, DING QUN, GAO MEIZHOU, HONG CHEN, QUN DING, MEIZHOU GAO
Принадлежит:

The invention provides a circuit of an oscillograph for displaying poincare section, which is capable of displaying the poincare section of a nonlinear system in a three dimensional space. The circuit comprises an analog-to-digital conversion circuit, a waveform conversion circuit, a switching circuit and an interference reduction circuit. The analog-to-digital conversion circuit is connected with the waveform conversion circuit which is connected with the switching circuit, and the switching circuit is connected with the interference reduction circuit. A control signal Vz controls two multiplier units at the same time; the other input ends of the two multiplier units are respectively switched to a Vx signal and a Vy signal; Vx and Vy multiply with Vz to reach the purpose of reducing the interference; and a Vxx signal and a Vyy signal with better effect can be produced. After the Vxx signal and Vyy signal are sent to the oscillograph, the poincare section can be displayed. The invention ...

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Номер записи: 5
25-06-2014 дата публикации

LDPC hard decision decoding method for dynamic threshold value bit-flipping

Номер: CN103888148A
Автор: GAO MEIZHOU, LI FENG, ZHANG HONGLIU, LIU DAYOU
Принадлежит:

The invention discloses an LDPC hard decision decoding method for dynamic threshold value bit-flipping. An initial flipping threshold value T is determined, a dynamic threshold value, namely, a dynamic flipping threshold value is adopted, the flipping threshold value is changed into the dynamic threshold value so that the misflipping probability can be reduced, the number of times of iterations of decoding is reduced, and bit-flipping decoding of an LDPC is efficient. Meanwhile, the error correcting capability of the LDPC is improved. The error correcting capability of the LDPC hard decision decoding method is better than that of a standard bit-flipping method.

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Номер записи: 6
23-07-2014 дата публикации

Elliptic domain curve operational method and elliptic domain curve arithmetic unit

Номер: CN103942031A
Автор: LIU QIHAO, LIU DAYOU, GAO MEIZHOU
Принадлежит:

The invention discloses an elliptic domain curve operational method and an elliptic domain curve arithmetic unit. Operations related to the elliptic domain curve operational method and the elliptic domain curve arithmetic unit are comprehensive. By the adoption of a new NAF expression method of dot product frequency k, the number of non-zero elements in a binary list similar to k is decreased; as a result, the frequency of a dot addition operation is reduced, the overall operational time of dot product is reduced, and the operational efficiency is high.

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Номер записи: 7