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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 13. Отображено 13.
17-11-2010 дата публикации

Method for preparing active carbon-aluminosilicate composite sorbent using oil shale as raw material

Номер: CN0101497025B
Принадлежит:

The invention provides a method for preparing an active carbon-aluminosilicate compound adsorbent, which takes oil shale as a raw material, and belongs to the technical field of chemical engineering. The method comprises the following steps that: 1, the oil shale powder is mixed with a mixed solution of inorganic acid and heated up while stirring, when no air bubble is escaped from the mixed material, the heating and the stirring stop, and the mixed material is cooled, filtered, water-washed and dried to obtain the oil shale with acid treatment; and 2, the obtained oil shale with acid treatment is mixed with a solution of NaOH, stirred, stood, heated up under the sealing condition, kept warm for 6 to 18 hours, cooled, filtered, water-washed and dried to obtain the active carbon-aluminosilicate compound adsorbent. In the method, the active carbon-aluminosilicate compound adsorbent is prepared from the oil shale, thereby replacing the high-priced active carbon and solving the problem ofthe ...

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14-07-2023 дата публикации

Causal event extraction method based on causal event extraction model

Номер: CN116431789A
Принадлежит:

The invention discloses a causal event extraction method based on a causal event extraction model, and the method comprises the following steps: constructing a causal event extraction model based on two subtasks: event extraction and causal relationship recognition; obtaining a to-be-input statement; coding a to-be-input statement on the basis of the pre-training language model, decoding the coded to-be-input statement on the basis of a sequence labeling decoder, and extracting an event with causal association; constructing an initial background image based on a causal event extraction model; inserting an event into the initial background image to obtain an updated background image; encoding and updating the updated background image by adopting a graph neural network to obtain the expression of the extracted event; and based on the classifier and the extracted representation of the events, obtaining a causal relationship between the events, and realizing extraction of the causal events.

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25-04-2023 дата публикации

OFDM (Orthogonal Frequency Division Multiplexing) signal symbol timing synchronization device

Номер: CN116016077A
Автор: LI CHAO, GAO JINGLONG
Принадлежит:

The invention discloses an OFDM (Orthogonal Frequency Division Multiplexing) signal symbol timing synchronization device, and relates to a signal symbol timing synchronization technology in the field of communication. The system comprises an orthogonal down converter, an AD, a matched filter, a received signal FFT module, a synchronizing signal conversion module, a frame synchronization detection module, a delay control module, a nonlinear demodulating module, a demodulating signal FFT module, a digital frequency conversion module, an error conversion and distribution module, a frequency offset estimation module and a carrier error extraction module. According to the invention, two paths of I/Q digital baseband signals before the operation of the received signal FFT module and two paths of I/Q digital baseband signals after the operation of the received signal FFT module are fully utilized, OFDM signal symbol timing errors are comprehensively obtained through a frequency offset estimation ...

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05-08-2009 дата публикации

Method for preparing active carbon-aluminosilicate composite sorbent using oil shale as raw material

Номер: CN0101497025A
Принадлежит:

The invention provides a method for preparing an active carbon-aluminosilicate compound adsorbent, which takes oil shale as a raw material, and belongs to the technical field of chemical engineering. The method comprises the following steps that: 1, the oil shale powder is mixed with a mixed solution of inorganic acid and heated up while stirring, when no air bubble is escaped from the mixed material, the heating and the stirring stop, and the mixed material is cooled, filtered, water-washed and dried to obtain the oil shale with acid treatment; and 2, the obtained oil shale with acid treatment is mixed with a solution of NaOH, stirred, stood, heated up under the sealing condition, kept warm for 6 to 18 hours, cooled, filtered, water-washed and dried to obtain the active carbon-aluminosilicate compound adsorbent. In the method, the active carbon-aluminosilicate compound adsorbent is prepared from the oil shale, thereby replacing the high-priced active carbon and solving the problem of the ...

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14-05-2014 дата публикации

High current pulsed electron beam surface treatment method for hard alloy coating tool

Номер: CN103789524A
Принадлежит:

The invention discloses a high current pulsed electron beam surface treatment method for a hard alloy coating tool. The method comprises the following process steps: cleaning the surface of the hard alloy coating tool to acetone to remove impurities such as oil dirt from the surface of the hard alloy coating tool; placing the treated hard alloy coating tool into a pulsed electron beam emission device to ensure that the tool surface to be treated is in the center of an electron beam irradiation spot, and vacuumizing a working chamber of the device to over 10<-3>Pa; performing irradiation bombardment on the coating tool through a pulsed electron beam with accelerating voltage of 10-15kV and pulse current of 100-200A, wherein the pulse duration is -10mu s, the pulse frequency is 0.1-10Hz, and the number of times of pulse is 1-50; after the treatment is finished, taking the tool out. By performing surface treatment on coatings such as single-layer TiN and TiAlN of a hard alloy matrix through ...

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23-06-2023 дата публикации

Baseline length constrained Beidou high-precision relative positioning method

Номер: CN116299625A
Принадлежит:

The invention provides a base line length constrained Beidou high-precision relative positioning method, which comprises the following steps of: 1, establishing a double-difference relative positioning model by utilizing pseudo-range and carrier phase original observed quantity of a reference station and a mobile station; 2, according to a least square criterion, obtaining a strict baseline length constrained objective function based on a double-difference relative positioning model; and a third step of adopting a whole cycle ambiguity search space amplification strategy to realize effective search of ambiguity, and accurately estimating position information of the mobile station relative to the reference station on the basis. According to the method disclosed by the invention, the resolving effect of relative positioning is improved by utilizing the length information of the double-antenna base line which is generally not fully utilized in an actual scene, and compared with the traditional ...

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30-10-2020 дата публикации

Copper-clad steel plate hot-rolling heating furnace mechanical conveying device

Номер: CN0211814572U

The utility model belongs to the field of national defense war industry, and particularly relates to a mechanical conveying device of a copper-clad steel plate hot-rolling heating furnace. Including atransfer platform, hydraulic station and cylinder barrel, cylinder rod and heating furnace shell, induction heating coil, a discharge port and a rotating shaft, a heating furnace shell body is a T-shaped iron shell, a discharging port is formed in one side of the upper portion of the heating furnace shell body, a cylindrical hollow induction heating coil is installed in the middle of the heatingfurnace shell body, the induction heating coil is tightly attached to the inner wall of the heating furnace shell body, the middle hollow size is larger than the size of the copper-clad steel plate stack, and the copper-clad steel plate stack can pass through the middle and be inductively heated. The interior of the heating furnace shell is consistent with the copper-clad steel plate in size, pitsare ...

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27-06-2023 дата публикации

Design method of active common-mode interference filter of high-voltage inverter system

Номер: CN116345860A
Автор: CHEN HENGLIN, GAO JINGLONG
Принадлежит:

The invention discloses a method for designing an active common-mode interference filter of a high-voltage inverter system, and the method comprises the steps: enabling the cut-off frequency of an active filter to be far smaller than the switching frequency of an inverter through analyzing the spectrum characteristics of the common-mode voltage of the output side of the inverter, thereby achieving the suppression of the common-mode voltage; meanwhile, the inversion system connected with the active filter is simplified and analyzed, a system transfer function is obtained, and then element values of all links of the active filter are determined. Aiming at the problems of low input impedance and crossover distortion in an amplification link of the active filter, the invention designs an improved structure of the active filter, namely, a voltage multiplier is added in front of a power amplification circuit, and finally, experiments prove that the provided active filter has a good suppression ...

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27-03-2018 дата публикации

Ultrasonic wave strikes sound insulation of answering ware of disappearing and falls make an uproar device and ultrasonic wave and strike to disappear and answer ware

Номер: CN0207143292U

The utility model discloses an ultrasonic wave strikes the sound insulation of answering the ware that disappears and falls the device of making an uproar. The ultrasonic wave strikes the sound insulation of answering the ware of disappearing and falls the device of making an uproar and include foamed aluminium and steel sheel, the tube -shape that the structure of steel sheel is reduced for the opening gradually, the foamed aluminium is pasted the internal surface of steel sheel, the foamed aluminium includes a plurality of holes, the body of a gun that the rifle is strikeed to the part is located in the steel sheel. Adopt the utility model discloses a give sound insulation and to fall the device of making an uproar, can realize that the ultrasonic wave strikes the sound insulation of answering the ware of disappearing and falls and make an uproar.

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08-07-2009 дата публикации

Method for improving oil shale oil yield by using waste plastic

Номер: CN0101475816A
Принадлежит:

The invention relates to a method for improving the oil yield of oil shale by making use of waste plastics, which belongs to the technical field of chemical engineering and comprises the following steps: (1) mixing oil shale powder with the particle size of between 0.05 and 5 millimeters with the waste plastics; (2) heating up the mixture until the temperature is between 300 and 650 DEG C, and then performing dry distillation on the mixture for 0.5 to 5 hours; and (3) condensing the oil gas obtained in the process of the dry distillation, and then collecting the oil gas to obtain shale oil. The method not only solves the environmental pollution problem of the waste plastics but also simultaneously improves the shale oil yield which is improved by more than 50 percent compared with a common method, thus the method has good application prospect.

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16-06-2010 дата публикации

Multi-channel annular column curtain vignette suction type dredger dredging simulator

Номер: CN0101739858A
Принадлежит:

The invention relates to a multi-channel annular column curtain vignette suction type dredger dredging simulator and belongs to the technical field of dredging engineering. The simulator comprises a simulating station, a data server and a visual system, wherein the simulating station is a vignette suction type dredger physic simulating platform; the data server samples a simulating calculated data for treating dredger, construction condition and environment and an action signal data of the physic simulating platform; the visual system comprises a multi-channel annular curtain projecting system and an image treating system; the image treating system receives a signal data of image action from the server and treats the corresponding image and action; and the multi-channel annular curtain projecting system is a column projecting system comprising an engineering projector and an annular curtain and is connected with an image treating system in order to project an image cut by the image treating ...

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30-12-2015 дата публикации

Carbon pole surface scarfing cinder equipment

Номер: CN0204912126U
Принадлежит:

The utility model provides a carbon pole surface scarfing cinder equipment, includes dust cage, feeder, driving shaft, throwing arbor, feeder axle, driven shaft, gear motor, first motor and second motor, feeder axle, driving shaft, throwing arbor and driven shaft are vertical, and the parallel has been laid in the dust cage, the output shaft of first motor passes through the shaft coupling and is connected with the one end of driving shaft, the one end at the feeder axle, the other end of feeder axle and gear motor's output shaft are installed to the feeder, the output shaft of shaft coupling and second motor is passed through to the one end of throwing the arbor, there are a plurality of throwing swoves along the axial equipartition on throwing the arbor. The utility model discloses an advantage: throw the sword and rotate the clearance attached to the burnt sediment on electrode surface, have the intensity of labour of reduction, reduce cost in business, the small investment, efficient ...

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08-04-2015 дата публикации

Method for increasing wettability of polytetrafluoroethylene film employing electron beam radiation

Номер: CN104497331A
Принадлежит:

The invention discloses a method for increasing wettability of a polytetrafluoroethylene film employing electron beam radiation. The method comprises the following steps: 1) cutting the polytetrafluoroethylene film into a shape which is 2cm in width and 5cm in length, wherein the thickness of the polytetrafluoroethylene film is 0.01-0.08mm; 2) cleaning the cut polytetrafluoroethylene film with ethanol until the surface is clean, and then drying; 3) putting the polytetrafluoroethylene film processed in the step 2) into a high-current pulsed electron beam vacuum sample chamber, starting a high-current pulsed electron beam instrument, and vacuumizing by virtue of a turbo molecular pump, wherein the range of the vacuum degree is 3*10<-2>Pa to 1*10<-2>Pa; and 4) impacting the material surface by adopting radiation of the high-current pulsed electron beam, and carrying out surface modification treatment, wherein the processing parameters are as follows: the acceleration voltage is 4-12kV; the ...

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