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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 18. Отображено 18.
11-08-2023 дата публикации

Fault monitoring method and system for relay protection device

Номер: CN116577594A
Автор: ZHANG ZIHONG, YU CHAO, DONG ZEQIU, NI FEIFEI, CHEN YANG, LIU YI, LI ZHIXING, CHOBODE, XU HAIJIAN, LIU QIUYING
Принадлежит:

The invention discloses a fault monitoring method and system for a relay protection device, and the method comprises the steps: extracting discrete sampling point data of a to-be-analyzed signal according to a preset period when the to-be-analyzed signal collected by the relay protection device is received, carrying out the discrete Fourier transformation, and generating transformation output phasor data; inputting the discrete sampling point quantity value in the conversion output phasor data and the discrete sampling point data into a preset intermediate parameter analysis function to generate intermediate data, and inputting the discrete sampling point quantity value and the intermediate data into a preset attenuation direct current influence function to generate attenuation direct current influence data; and generating a power frequency alternating current phasor according to the attenuation direct current influence data, the conversion output phasor data and the discrete sampling point ...

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Номер записи: 1
01-08-2023 дата публикации

Reaction kettle opening sealing device

Номер: CN116510645A
Автор: ZHOU JIABING, NI FEIFEI
Принадлежит:

The invention relates to the technical field of reaction kettles, in particular to a reaction kettle opening sealing device which comprises a reaction kettle body, a feeding opening formed in the top of the reaction kettle body and a feeding pipe fixed to the reaction kettle body and matched with the feeding opening, and a sealing mechanism used for sealing the feeding opening is arranged on the feeding pipe. The sealing mechanism comprises a sealing cover arranged on the feeding pipe and a connecting base arranged on the inner side of the sealing cover and fixed to the feeding pipe, a movable connecting rod is arranged at the top of the sealing cover, a locking assembly used for being fixed to the connecting base is arranged on the sealing cover, and a driving assembly used for driving the locking assembly to operate is arranged on the movable connecting rod. According to the sealing device, a worker can seal the opening of the reaction kettle more conveniently, so that the sealing device ...

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Номер записи: 2
25-08-2023 дата публикации

Relay protection setting value checking method, device and equipment

Номер: CN116646891A
Автор: LI ZHIXING, LIU YI, FENG ZHENSHENG, ZHANG LULIANG, TANG HE, YAO JIKUN, LI YONGHAO, NI FEIFEI, LIAO FENG, LIN LIPENG, LIU QIUYING, HE HUILUN, CHEN YANG, XIAO XINRONG, ZHANG FENG, HE SHENGHONG
Принадлежит:

The invention discloses a relay protection setting value checking method, device and equipment, and the method comprises the steps: obtaining a to-be-checked setting value file and a scheduling setting value file in response to a setting value checking request, extracting the to-be-checked setting value file through employing a regular expression, and generating a plurality of first data trees, and extracting a scheduling constant value file through an open source library, generating a plurality of second data trees according to the extracted scheduling constant value file, inputting all the first data trees and all the second data trees into a pre-trained large language model to match and determine leaf node groups, and performing consistency comparison on constant values in each leaf node group through the large language model to generate a check report. The whole relay protection constant value checking process is based on the semantic understanding capability of the large language model ...

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Номер записи: 3
23-07-2014 дата публикации

Refining agent used for alloy steel smelting and preparation method thereof

Номер: CN103937930A
Автор: NI FEIFEI
Принадлежит:

The invention discloses a refining agent used for alloy steel smelting and a preparation method of the refining agent. The refining agent is prepared from the following raw materials in parts by weight: 14-16 parts of kaolin, 3-4 parts of potassium feldspar powder, 1-2 parts of maifanite powder, 1.5-3 parts of cryolite powder, 2-3 parts of light calcium carbonate, 2-3 parts of zinc oxide, 5-6 parts of calcium fluoride, 1-2 parts of barium chloride, 3-4 parts of aluminium sulphate, 1-2 parts of manganese oxide, 1.5-3 parts of sodium metasilicate, 2.5-3.5 parts of nanometer silicon dioxide, 5-7 parts of rare earth fluoride, 0.2-0.4 part of sponge titanium, 0.8-1.2 parts of yttrium carbonate, 0.5-0.7 part of potassium zirconium fluoride, 2-4 parts of cerium oxide, and 6-8 parts of wood ash. The refining agent disclosed by the invention contains rare earth fluoride, yttrium carbonate and potassium zirconium fluoride, and the content of rare earth element in alloy steel is increased, thereby ...

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Номер записи: 4
23-07-2014 дата публикации

Efficient refining agent for smelting aluminum alloy and preparation method thereof

Номер: CN103938008A
Автор: NI FEIFEI
Принадлежит:

The invention discloses an efficient refining agent for smelting an aluminum alloy. The efficient refining agent is prepared from the following raw materials in parts by weight: 6-8 parts of plant ash, 8-10 parts of bentonite, 3-5 parts of wollastonite in powder, 3.5-5.5 parts of celestite powder, 0.5-2 parts of graphite powder, 3-5 parts of jade powder, 2-4 parts of quartz sand, 8-10 parts of magnesium hydroxide, 8-10 parts of lithium chloride, 6-8 parts of zinc chloride, 3-4 parts of calcium chloride, 2-4 parts of barium chloride, 4-5 parts of potassium fluosilicate, 1-2 parts of potassium tripolyphosphate, 2-3 parts of sodium sulfate, 1-2 parts of sodium metasilicate, 7-8 parts of rare earth carbonate, 0.1-1.0 part of boron oxide, 0.8-1.2 parts of yttrium fluoride and 3-5 parts of cerium oxide. The efficient refining agent can be used for effectively removing nonmetallic inclusions from an aluminum alloy melt and reducing the loss of rare earth elements in the alloy, and has a good degassing ...

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Номер записи: 5
23-07-2014 дата публикации

Anti-corrosion and anti-wear high manganese steel and preparation method thereof

Номер: CN103938117A
Автор: NI FEIFEI
Принадлежит:

The invention discloses anti-corrosion and anti-wear high manganese steel and a preparation method thereof. The high manganese steel consists of the following components in percentage by weight: 1.0-1.2% of carbon, 14-15% of manganese, 0.48-0.6% of silicon, 10.5-12.5% of chromium, 0.5-0.6% of molybdenum, 0.3-0.5% of nickel, 0.1-0.3% of aluminum, 0.08-0.12% of copper, 0.01-0.02% of nitrogen, 0.01-0.03% of rare earth element, less than or equal to 0.03% of phosphorus, less than or equal to 0.03% of sulfur and the balance of iron. The preparation method comprises: (1) smelting: adding alloy and metal raw materials including technically pure iron, nitrided ferrovanadium, ferromanganese, technically pure aluminum and the like into an electric furnace, heating to melt all the alloy and metal raw materials, maintaining for 30 minutes at the temperature of 1,730-1,750DEG C, and discharging at the temperature of 1,460-1,500 DEG C; (2) casting; (3) heat treatment after casting; and (4) product acceptance ...

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Номер записи: 6
23-07-2014 дата публикации

Alloy steel material for pump shaft

Номер: CN103938118A
Автор: NI FEIFEI
Принадлежит:

The invention discloses an alloy steel material for a pump shaft. The alloy steel material comprises the following chemical elementary compositions in percentage by mass: 0.5-0.6% of carbon, 7.6-7.8% of nickel, 0.2-0.4% of chromium, 3.0-3.2% of manganese, 0.3-0.5% of silicon, 0.03-0.05% of molybdenum, 0.01-0.03% of cerium, 0.02-0.04% of magnesium, 0.006-0.008% of tungsten, less than or equal to 0.01% of P, less than or equal to 0.01% of S and the balance of iron and inevitable impurities. The alloy steel material disclosed by the invention is prepared from the multiple elements by reasonably setting a ratio, has relatively good comprehensive mechanical property, high abrasive resistance and hardness, relatively good toughness, relatively high fatigue strength and good casting property and is high in rate of finished products. The alloy steel material is used for the pump shaft, so that the service life of the pump shaft is prolonged.

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Номер записи: 7
16-07-2014 дата публикации

High chrome alloy steel material and preparation method thereof

Номер: CN103924164A
Автор: NI FEIFEI
Принадлежит:

The invention discloses a high chrome alloy steel material and a preparation method thereof. The high chrome alloy steel material contains the following chemical elements by mass percent: 2.6-2.8% of carbon, 11.3-12.5% of chrome, 0.1-0.3% of nickel, 0.3-0.5% of manganese, 0.04-0.06% of molybdenum, 0.3-0.5% of vanadium, 0.005-0.006% of titanium, 0.7-0.8% of copper, not more than 0.03% of P, not more than 0.03% of S and the balance of iron. The high chrome alloy steel material has the beneficial effects that the hardenability and corrosion resistance of steel can be improved by increasing the content of chrome; by reasonably setting the ratio and the production process, the formed alloy material has excellent comprehensive mechanical properties and has the advantages of ultrahigh strength, good wear resistance, strong corrosion resistance and the like; by using the adopted refining agent for casting production, the yield is obviously increased, and in particular, the porosity in castings ...

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Номер записи: 8
23-07-2014 дата публикации

Low-temperature-resistant high-strength alloy steel material

Номер: CN103938100A
Автор: NI FEIFEI
Принадлежит:

The invention discloses a low temperature resistant high-strength alloy steel material. The low-temperature-resistant high-strength alloy steel material contains the following chemical element components by weight percent: 0.1%-0.2% of carbon, 3.2%-3.5% of manganese, 1.5%-1.7% of silicon, 2.2%-3.2% of molybdenum, 2.0%-2.2% of titanium, 1.5%-2.5% of chromium, 0.3%-0.5% of berkelium, 0.08%-0.12% of niobium, 0.01%-0.03% of copper, less than or equal to 0.04% of phosphorus, less than or equal to 0.04% of sulfur, and the balance of iron. A preparation method comprises the following steps: (1) smelting; (2) casting; (3) heat treatment after casting; (4) product acceptance. The low-temperature-resistant high-strength alloy steel material disclosed by the invention is reasonable in proportions of various alloy elements, the proportion of the carbon element guarantees the uniformity of a steel structure and improves the weatherability of steel, the manganese and silicon elements are important strengthening ...

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Номер записи: 9
23-07-2014 дата публикации

Ultra-high carbon steel and preparation method thereof

Номер: CN103938112A
Автор: NI FEIFEI
Принадлежит:

The invention discloses ultra-high carbon steel and a preparation method thereof. The ultra-high carbon steel comprises the following components by weight percent: 1.6-2.1% of carbon, 3-5% of nickel, 13-16% of chromium, 0.01-0.03% of manganese, 2.3-2.6% of tungsten, 1.3-1.8% of cobalt, 0.06-0.08% of niobium, 0.04-0.08% of silicon, 0.8-1.4% of copper, 0.006-0.009% of Ce, 0.003-0.007% of La, no more than 0.03% of P, no more than 0.03% of S, and the balance of iron. The preparation method comprises the following steps: (1) smelting; (2) thermal treatment after pouring; (3) quenching; (4) secondary quenching treatment, namely carrying out spray cooling on the surface of the ultra-high carbon steel when cooling to 500-600 DEG C by adopting continuous flow, and controlling the flow rate of the continuous flow to 30-40L/min; and (5) checking and accepting the product. The alloy elements are reasonable in proportion, and the prepared high carbon steel has the advantages of high strength, high hardness ...

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Номер записи: 10
23-07-2014 дата публикации

High strength high nickel steel material and preparation method thereof

Номер: CN103938087A
Автор: NI FEIFEI
Принадлежит:

The invention discloses a high strength high nickel steel material which comprises the following chemical components in percentage by weight: 0.06-0.08% of carbon, 0.08-0.12% of silicon, 15.2-16.3% of nickel, 0.03-0.05% of manganese, 1.2-1.4% of tungsten, 0.4-0.5% of copper, 0.003-0.005% of titanium, 0.01-0.015% of aluminum, 0.007-0.009% of boron, less than or equal to 0.01% of P, less than or equal to 0.01% of S and the balance of iron. The preparation method comprises the following steps: (1) melting and smelting waste steel in an electric-arc furnace to desulfurize and deoxidize; (2) alloying, namely sequentially adding manganese, nickel, aluminum, boron, silicon, copper, tungsten and titanium to alloy; (3) pouring molten steel into a refining furnace and adding a refining agent to refine, cast and thermally treat after casting. By improving the content of nickel and reasonably configuring proportion and production process, the alloy material formed has the advantages of ultrahigh strength ...

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Номер записи: 11
11-04-2023 дата публикации

Short-term power load prediction method based on improved feedforward neural network model

Номер: CN115952927A
Автор: ZHENG WEIQIN, ZHONG WEI, TANG HE, MA XIN, HE SHENGHONG, TAN JIAYONG, NI FEIFEI, CHEN ZHIPING, ZHANG YONG, ZHANG ZHEMING, YE XIAOGANG, FENG ZHENSHENG, WANG JUNBO, TAN YONGLAN, LUO LINFENG, WU JIEXUAN, JIANG MEILING, ZHONG JIASHEN
Принадлежит:

The invention provides a short-term power load prediction method based on an improved feed-forward neural network model, power load prediction is carried out through the improved feed-forward neural network model, the model comprises an input layer, an enhanced hidden layer and an output layer, the enhanced hidden layer comprises a plurality of transient hidden layers, and the transient hidden layers are connected with the output layer. Different transient hidden layers mine and capture characteristics of different load data, and output of the enhanced hidden layer is obtained in an aggregation mode, so that the method adapts to diversity and uncertainty of the load data. According to the improved feed-forward neural network model, a hidden layer in a traditional neural network structure is improved, an enhanced hidden layer concept is provided, deep learning and mining of characteristics of load data are carried out, and uncertainty and randomness of the load data are adaptively learned ...

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Номер записи: 12
30-07-2014 дата публикации

High-temperature-resistant wear-resistant high-manganese steel and preparation method thereof

Номер: CN103952645A
Автор: NI FEIFEI
Принадлежит:

The invention discloses high-temperature-resistant wear-resistant high-manganese steel and a preparation method thereof. The steel comprises the following compositions in percent by mass: 1.0-1.2% of carbon, 11-13% of manganese, 1.2-1.4% of silicon, 0.6-0.8% of chromium, 3.2-3.6% of tungsten, 1.1-1.2% of molybdenum, 0.8-1.2% of nickel, 0.1-0.3% of aluminium, 0.08-0.12% of magnesium, 0.04-0.06% rare earth elements, 0.08% or less of phosphorus, 0.08% or less of sulfur, and the balance iron. The preparation method comprises: (1) smelting, specifically adding industrial pure iron, ferromanganese, industrial pure aluminium and other alloy and metal raw materials into an electric furnace, heating to melt all compositions, keeping the temperature of 1730-1750 DEG C for 30 min, adding an alternant accounting for 0.2-0.5% by weight of the melt solution to perform modification processing on the melt solution, discharging from the furnace with the temperature of 1600-1700 DEG C; (2) casting; (3) performing ...

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Номер записи: 13
25-08-2023 дата публикации

Flexible photovoltaic support

Номер: CN116647168A
Автор: NI QINGXIAN, MA KEWEI, SHI QI, NI QINGCHENG, NI GAOYANG, NI FEIFEI
Принадлежит:

The invention relates to the technical field of flexible supports, in particular to a flexible photovoltaic support which comprises two height-adjustable supporting columns and further comprises two wire drawing frames, the two wire drawing frames are detachably and fixedly installed on the two supporting columns respectively, wire laying mechanisms are installed on the two wire drawing frames, and each wire laying mechanism comprises a wire laying mechanism body, a wire laying mechanism body and a wire laying mechanism body. The stranded wire positioning assembly and the stranded wire positioning mechanism are installed on the wire pulling frame, and the stranded wire positioning assembly comprises a transverse positioning assembly and a longitudinal positioning assembly. When the photovoltaic panel is erected, the photovoltaic panel can be installed on the ground in the steel strand laying process; according to the technical scheme, high-altitude laying of the photovoltaic panel is not ...

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Номер записи: 14
18-07-2023 дата публикации

Spur dike water depth and flow velocity measuring ship in case of accident

Номер: CN116443186A
Автор: JIN XUEDONG, GENG MIAORUI, ZHENG ZHAO, LI JIHUI, CAO LINYAN, GENG JITAO, CUI TIANJIAO, WU TIAN, WANG FENGQUN, YAO DI, MA QIHAO, XUE KAI, ZHOU ZHENG, ZANG MING, CUI WENJUAN, NI FEIFEI, LI LIQIN, WANG WEIFENG, ZHAO HAIPEI, ZHAO WEI, WANG GANG, ZHOU FENG, SUN JIAN, QIU ZIXUAN, LI KAI, SUN YAN, HAN ZHANPING, HU ZHENG
Принадлежит:

The invention relates to an accident spur dike water depth and flow velocity measuring ship, which belongs to the technical field of emergency rescue of dikes and dams and has IPC (International Patent Classification) numbers of E02B 1/00 and E02B 3/00. The water depth and flow velocity measuring ship comprises a buoyancy system, a power system, an integral connecting system, an anti-collision system, an anti-rollover water depth calibration system, a flow velocity calibration device and a water depth and flow velocity telemetering system. Aiming at the problems existing in current water depth and flow velocity measurement, manual measurement and automatic measurement are performed synchronously, the defect that current automatic measurement data cannot be calibrated in time is overcome, water depth and flow velocity can be measured quickly and effectively, accurate data support is provided for scientific and effective rescue of river regulation projects such as spur dikes of large rivers ...

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Номер записи: 15
11-04-2023 дата публикации

Short-term power load prediction method and device, equipment and storage medium

Номер: CN115952928A
Автор: ZHENG WEIQIN, HE SHENGHONG, TANG HE, OU WEICHAO, JIN XIANGCHAO, TAN JIAYONG, GUO XIUJIE, MA XIN, ZHONG WEI, NI FEIFEI, CHEN ZHIPING, LUO XIAOLONG, ZHANG YONG, ZHANG ZHEMING, WANG JUNBO, YE XIAOGANG, HUANG JIALIANG, FENG ZHENSHENG, CHEN ZEXIN
Принадлежит:

The invention discloses a short-term power load prediction method, device and equipment and a storage medium, and the method comprises the steps: carrying out the coding analysis of a load time sequence through a GRU encoder, and obtaining an initial feature matrix; performing feature analysis on the initial feature matrix based on various load label information to obtain a first load feature vector; performing feature form calculation according to the initial feature matrix and the first load feature vector to obtain a first residual feature vector, and performing load potential feature analysis on the first residual feature vector to obtain a second load feature vector; performing load personality feature analysis based on a second load feature vector acquisition method to obtain a third load feature vector; and predicting a short-term load prediction result according to the aggregated load feature vectors. Therefore, the technical problem that in the prior art, multi-scale, multi-angle ...

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Номер записи: 16
28-07-2023 дата публикации

Method for measuring water depth flow velocity of spur dike

Номер: CN116495117A
Автор: JIN XUEDONG, GENG MIAORUI, ZHENG ZHAO, LI JIHUI, CAO LINYAN, GENG JITAO, CUI TIANJIAO, WU TIAN, WANG FENGQUN, YAO DI, MA QIHAO, XUE KAI, ZHOU ZHENG, ZANG MING, CUI WENJUAN, NI FEIFEI, LI LIQIN, WANG WEIFENG, ZHAO HAIPEI, ZHAO WEI, WANG GANG, ZHOU FENG, SUN JIAN, QIU ZIXUAN, LI KAI, SUN YAN, HAN ZHANPING, HU ZHENG
Принадлежит:

The invention relates to a spur dike water depth flow velocity measurement method, which belongs to the technical field of dike and dam emergency rescue and has IPC (International Patent Classification) numbers of E02B 1/00 and E02B 3/00. The water depth and flow velocity measuring ship comprises a buoyancy system, a power system, an integral connecting system, an anti-collision system, an anti-rollover water depth calibration system, a flow velocity calibration device and a water depth and flow velocity telemetering system. Aiming at the problems existing in current water depth and flow velocity measurement, manual measurement and automatic measurement are performed synchronously, the defect that current automatic measurement data cannot be calibrated in time is overcome, water depth and flow velocity can be measured quickly and effectively, accurate data support is provided for scientific and effective rescue of river regulation projects such as spur dikes of large rivers, and the method ...

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Номер записи: 17
30-07-2014 дата публикации

Attapulgite-containing refining agent for melting of magnesium alloy

Номер: CN103952611A
Автор: NI FEIFEI
Принадлежит:

A disclosed attapulgite-containing refining agent for melting of magnesium alloy is prepared from the following raw materials in parts by weight: 8-10 parts of attapulgite, 2-4 parts of quartz sand nanometer powder, 12-15 parts of tool steel powder, 3-4 parts of barium oxide, 2-3 parts of boron oxide, 3-4 parts of calcium fluoride, 1-2 parts of manganese chloride, 2-3 parts of magnesium sulfate, 0.3-0.5 part of titanium sponge, 2-3 parts of nanometer silica, 1-2 parts of straw ash, 10-12 parts of sodium nitrate, 1-2 parts of vermiculite powder, 3-4 parts of cryolite, 5-7 parts of charcoal powder, 13-15 parts of hexachloroethane, 7-9 parts of chlorinated rare earth, 5-6 parts of zirconium tetrachloride and 4-6 parts of GaSi. According to the refining agent, titanium sponge, manganese chloride and boron oxide are capable of chemically reacting with element iron in melt for forming compounds, slagging and discharging, so that the content of iron element in magnesium alloy is substantially ...

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Номер записи: 18