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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 12. Отображено 12.
30-12-2021 дата публикации

METHOD FOR DENOISING UNDERWATER ACOUSTIC SIGNAL ON THE BASIS OF ADAPTIVE WINDOW FILTERING AND WAVELET THRESHOLD OPTIMIZATION

Номер: WO2021258832A1
Автор: WANG, Jingjing, LI, Jiaheng, DONG, Xinli, YANG, Xinghai, SHI, Wei, XU, Lingwei, GUO, Ying, LI, Haitao
Принадлежит:

Provided is a method for denoising an underwater acoustic signal on the basis of adaptive window filtering and wavelet threshold optimization. Said method comprises: first describing, in conjunction with an SαS distribution and normal distribution model, a Gaussian/non-Gaussian pulse noise in an underwater acoustic channel; designing a median filtering method based on an adaptive window, and correcting the size of a filtering window according to the number of noise points in the window, so as to suppress the non-Gaussian pulse noise; and then, on the basis of an improved artificial bee colony method (GDES-ABC), optimizing threshold parameters of a wavelet threshold denoising method, thereby improving the capability of suppressing Gaussian noise. Said method can effectively suppress Gaussian/non-Gaussian pulse noises in a complex underwater acoustic environment, improve the receiving capability of underwater acoustic communication signals such as 2FSK, QPSK and 16QAM, and obtain a higher ...

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Номер записи: 1
06-06-2023 дата публикации

Data collection method for AUV (Autonomous Underwater Vehicle) and underwater wireless sensor network

Номер: CN116233784A
Автор: LIU SHUAI, WANG JINGJING, XU JINYUN, SHI WEI, YAN SHEFENG, QIAO GANG, NIU QIUNA, XU LINGWEI
Принадлежит:

The invention discloses a data collection method for an AUV (Autonomous Underwater Vehicle) and an underwater wireless sensor network, and belongs to the technical field of underwater communication. According to the method, firstly, all sensor nodes are divided into different clusters, and each cluster elects a cluster head for interactive communication with an AUV (Autonomous Underwater Vehicle); then the AUV goes to the nearest cluster and sends an activation data packet to a cluster head, after the cluster head is activated, the cluster enters a wake-up stage, then the cluster head sends a wake-up data packet to a member node, necessary information of physical layer power control is embedded in the wake-up data packet, and the member node of the cluster performs power control according to the information; and finally, the clusters enter a data transmission stage, the cluster member nodes send data to the cluster head, and the AUV receives a data packet from the cluster head until all ...

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Номер записи: 2
25-04-2023 дата публикации

Umbilical cord mesenchymal stem cell supernate for injury repair as well as product and preparation method thereof

Номер: CN115998666A
Автор: SUN HONGTAO, NIU HANJIE, WANG JINGJING, REN DANGLI, LI ZEMENG, LI RUI, QU YANG, LI JIANWEI, DIAO YUNFENG, CHEN CHONG
Принадлежит:

The invention belongs to the technical field of biomedical beauty products, and particularly relates to an umbilical cord mesenchymal stem cell supernatant for injury repair, and a product and a preparation method thereof. The preparation method of the umbilical cord mesenchymal stem cell supernatant for injury repair comprises the following steps: (1) primary culture; (2) subculture; and (3) starvation culture. The supernate prepared by the method contains more than hundreds of cell factors and rich cell active substances including exosomes, has an outstanding effect of balancing and regulating cell growth activation, has a remarkable effect of repairing damage, does not contain an extraneous culture medium and cell components, is high in skin use safety, stable in quality between product batches and suitable for large-scale production. The composition can be further prepared into freeze-dried powder with well preserved active substances for long-term preservation.

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Номер записи: 3
30-06-2023 дата публикации

Coloring color paste for ultra-high molecular weight polyethylene fibers and preparation method of coloring color paste

Номер: CN116356443A
Автор: WANG JINGJING, WANG PENG, SHA XIAOFENG, DING XIAODONG, CHEN ZHEN, XIAO ZHIYONG, WU XIAOXIN
Принадлежит:

The invention discloses a coloring color paste for ultra-high molecular weight polyethylene fiber and a preparation method thereof, and the coloring color paste for ultra-high molecular weight polyethylene fiber is composed of the following components in percentage by mass based on the total weight of the coloring color paste for ultra-high molecular weight polyethylene fiber: 72.38%-93.84% of white oil, 0.4%-10.28% of pigment, 4.11%-12.3% of dispersing agent, 0.4%-2.05% of emulsifying agent, 0.1%-0.2% of defoaming agent, 0.1%-0.2% of defoaming agent, and the balance of water. 1.23%-2.05% of an antioxidant and 0.02%-0.04% of ultra-high molecular weight polyethylene. The color paste is used for preparing colored ultra-high molecular weight polyethylene fibers by a stock solution coloring spinning process. The prepared colored fiber has the advantages of bright color, high-strength and high-modulus mechanical properties and small batch color difference.

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Номер записи: 4
04-07-2023 дата публикации

Underwater sensor network cross-layer topology method based on potential game

Номер: CN116390046A
Автор: GAO JIA, WANG JINGJING, SHI WEI, HAN XUEYAN, XU LINGWEI, GU JIANLEI
Принадлежит:

The invention discloses an underwater sensor network cross-layer topology method based on a potential game, and belongs to the field of underwater sensor network energy saving. According to the method, firstly, establishment of a neighbor set and acquisition of related information are completed through interaction of control information; then, an optional power set is determined and sorted in a descending order, cross-layer parameters such as connectivity, residual energy and node delay are introduced into a revenue function, a potential game model is established, and proper transmitting power is selected for nodes in an alternate game mode; and finally, updating the adjacent nodes and the communication radius according to the change of the transmitting power, and dynamically adjusting the network topology structure. According to the method, the Nash equilibrium point of the ordinal number potential game model is ensured, the benefit maximization of each node is kept through the selection ...

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Номер записи: 5
13-08-2021 дата публикации

Underwater acoustic communication modulation mode identification method based on feature fusion and lightweight hybrid neural network

Номер: CN113259288A
Автор: WANG JINGJING, ZHANG WEILONG, HUANG ZIHAO, WU CHENG'AN, YANG XINGHAI, SHI WEI, SUN YANING, SUN ZHENG, ZHANG XIANGGUANG, 王景景, 张威龙, 黄子豪, 吴承安, 杨星海, 施威, 孙雅宁, 孙正, 张祥光
Принадлежит:

The invention discloses an underwater acoustic communication modulation mode identification method based on feature fusion and a lightweight hybrid neural network. The method comprises the following steps: firstly, extracting entropy features and morphological features in underwater acoustic signals; processing the obtained features by using a linear discriminant analysis method to obtain specific features; constructing a shallow layer of the hybrid neural network by using a long-short-term neural network; carrying out improvement based on a YOLO v2 neural network, taking YOLO v2 neural network as a deep layer of the hybrid neural network, combining the two neural networks, and extracting abstract features of the underwater acoustic signals; combining the abstract features with the specific features to obtain a complete feature set; inputting the feature set into the neural network to realize accurate identification of an underwater acoustic signal modulation mode; training the network ...

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Номер записи: 6
11-07-2023 дата публикации

Underwater acoustic communication energy optimization method based on combination of cross-layer design and deep Q network

Номер: CN116419290A
Автор: LIU SHUAI, WANG YU, YU ZEHUI, CAO RUNQI, WANG MENG, JIAO LULU, LIU ZHAO, WANG JINGJING
Принадлежит:

The invention discloses an underwater acoustic communication energy optimization method based on cross-layer design combined with a deep Q network. The method comprises the following steps of: firstly, laying an underwater acoustic sensor network underwater, and establishing an underwater network physical layer transmission power constraint, a channel access rate constraint of an MAC (Media Access Control) layer and a data packet throughput constraint of a routing layer on the basis of considering energy; then, on the basis of the constraints, performing cross-layer design on the network, and establishing a cross-three-layer energy optimization model; and finally, solving the parameters of the energy optimization model by adopting a deep Q network, and iteratively updating the parameters of the cross-layer energy optimization model until the optimal parameters of network energy optimization are output. The method can effectively deal with an energy-limited environment during underwater ...

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Номер записи: 7
25-08-2023 дата публикации

Yarn dyeing device for producing fiber protective gloves

Номер: CN116641194A
Автор: WANG PENG, WANG XIANHUA, WANG SHUANGCHENG, GU ZHIQI, WANG JINGJING
Принадлежит:

The invention discloses a yarn dyeing device for producing fiber protective gloves, which comprises a dyeing box for containing dyeing liquid, and a roller for hanging coiled yarns is arranged on the dyeing box; the invention relates to the technical field of yarn dyeing equipment. According to the yarn dyeing device for production of the fiber protective gloves, a transmission connecting structure is arranged on the dyeing box, so that a driving mechanism can drive a limiting structure to extrude and fix a roller through the transmission connecting structure in the running process, and after fixing, the roller can be placed through the cooperation effect of a placing cylinder and the limiting structure; the roller is driven to intermittently rotate, so that the coiled yarn on the roller is driven to intermittently rotate, the contact part of the yarn and the dyeing liquid is changed, the yarn is uniformly dyed, meanwhile, due to the fact that the roller intermittently rotates, the dyeing ...

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Номер записи: 8
05-05-2023 дата публикации

Underwater acoustic signal processing method based on adaptive wavelet threshold function

Номер: CN116070094A
Автор: LI SHUANG, WANG JINGJING, XU LINGWEI, YANG JIANMIN, LIU SHUAI, YU ZEHUI, YANG XINGHAI
Принадлежит:

The invention discloses an underwater acoustic signal processing method based on a self-adaptive wavelet threshold function, and belongs to the technical field of ocean information. According to the method, firstly, a bilateral enhanced wavelet threshold function based on an adjustable return-to-zero window is put forward, the bilateral enhanced wavelet threshold function is constructed by using a threshold, oscillation of an existing wavelet threshold function can be eliminated, in the reconstruction process, a wavelet coefficient does not have faults, and stable decomposition and reconstruction of wavelets are ensured; estimating the signal-to-noise ratio of the signal according to the variance of the noisy signal, and adaptively adjusting the parameter of a return-to-zero window according to the signal-to-noise ratio, thereby better eliminating the wavelet coefficient of the noise and improving the denoising performance; and finally, during wavelet coefficient reconstruction, an appropriate ...

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Номер записи: 9
09-05-2023 дата публикации

Signal modulation mode identification method based on One2ThreeNet

Номер: CN116094885A
Автор: WANG JINGJING, HUANG ZIHAO, YU ZEHUI, SHI WEI, YAN SHEFENG, QIAO GANG, WANG HAIHONG
Принадлежит:

The invention discloses a signal modulation mode identification method based on One2ThreeNet, and belongs to the technical field of underwater acoustic communication. The method comprises a microscopic scale selection step, an underwater acoustic signal preprocessing step, a neural network construction step, a neural network training step and an underwater acoustic signal modulation mode identification step. According to the method, a micro-scale concept and a time sequence feature extractor One2Three Block are provided, detailed and complete time sequence feature extraction is carried out on signals from three scales, and the effectiveness of the time sequence features is ensured; according to the method, a dual-compression excitation convolution module Dual-Stream SE Block is provided, on one hand, the network width is widened, the diversity of feature extraction is ensured, on the other hand, the weight of each channel of the feature map is optimized, invalid feature expression is inhibited ...

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Номер записи: 10
23-06-2023 дата публикации

Acrylic acid modified waterborne polyurethane emulsion for fiber reinforced composite material and preparation method of acrylic acid modified waterborne polyurethane emulsion

Номер: CN116284586A
Автор: WU XIAOXIN, DING XIAODONG, GU ZHIQI, WANG PENG, CHEN TIANPENG, SHA XIAOFENG, CHEN ZHEN, XIAO ZHIYONG, WANG JINGJING
Принадлежит:

The invention discloses an acrylic acid modified waterborne polyurethane emulsion for a fiber reinforced composite material and a preparation method of the acrylic acid modified waterborne polyurethane emulsion. The acrylic acid modified waterborne polyurethane emulsion is prepared from the following components in parts by weight: 10-60 parts of first polyol, 1-5 parts of second polyol, 10-40 parts of diisocyanate, 0.001-0.1 part of a catalyst, 1-4 parts of a micromolecule chain extender, 1-4 parts of a disulfide bond chain extender, 1-6 parts of a hydrophilic chain extender, 1-6 parts of a cross-linking agent and 1-10 parts of a silane coupling agent, 1-6 parts of a salt-forming agent, 5-14 parts of a first acrylic monomer, 5-30 parts of a second acrylic monomer, 5-30 parts of a third acrylic monomer, 0.5-2 parts of a buffer agent, 1-3 parts of an emulsifier and 0.1-0.3 part of a free radical initiator. The acrylic acid modified waterborne polyurethane emulsion has good stability, and ...

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Номер записи: 11
07-07-2023 дата публикации

Bionic signal processing method based on wavelet transform and generative adversarial network

Номер: CN116403590A
Автор: WANG JINGJING, CAO RUNQI, LIU SHUAI, SHI WEI, YANG XINGHAI, WANG MENG, JIANG SHUAI, JIANG JIAMING
Принадлежит:

The invention discloses a bionic signal processing method based on wavelet transform and a generative adversarial network, and belongs to the technical field of underwater acoustic signal processing. The method comprises the following steps: firstly, carrying out wavelet decomposition on marine mammal sounds to obtain wavelet components; designing and building a bionic generative adversarial network for the one-dimensional audio data set; inputting the third-stage wavelet high-frequency component and the modulation signal into a bionic generative adversarial network for training; the trained encoder carries out information embedding on a wavelet component, a bionic signal is obtained through wavelet reconstruction, the bionic signal is received by a receiver through an ocean channel and then is subjected to wavelet decomposition, and a modulated signal embedded in a third-stage wavelet high-frequency component is decoded by using the trained decoder. According to the method, high-concealment ...

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Номер записи: 12