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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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Форма поиска

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 24. Отображено 24.
09-05-2023 дата публикации

Multi-phase regulation and control multi-end joint control impulse generator and pulse ignition system and method

Номер: CN116087699A
Принадлежит:

The invention discloses a multi-phase regulation and control multi-end joint control impulse generator and a pulse ignition system and method. The pulse ignition system comprises a control device and n sealed discharge gaps. An ignition device and a multi-phase monitoring assembly are embedded in the sealed discharge gap; the ignition device enables the sealed discharge gap to be disrupted and discharged under pulse triggering; the multi-phase monitoring assembly is used for monitoring internal environment data of the sealed discharge gap and transmitting a monitoring signal to the control device; the control device determines an optimal gap distance and an environment parameter according to the monitoring signal and the breakdown voltage; and adjusting the gap spacing of the sealed discharge gap and the environmental parameters according to the optimal gap spacing and the environmental parameters, so that the gap spacing of the sealed discharge gap and the environmental parameters meet ...

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13-08-2021 дата публикации

Perfluoropentanone mixed gas type electrical equipment insulating medium as well as preparation method and application thereof

Номер: CN113257459A
Принадлежит:

The invention discloses a perfluoropentanone mixed gas type electrical equipment insulating medium and a preparation method and application thereof. The mixed gas comprises perfluoropentanone and gas with low liquefaction temperature, the target partial pressure of the perfluoropentanone in the mixed gas is k, and k is greater than or equal to k1 and less than or equal to k2, wherein k1 and k2 are respectively the partial pressure of the perfluoropentanone in the mixed gas meeting the insulation requirement of the electrical equipment and the partial pressure of the perfluoropentanone in the mixed gas meeting the operating temperature requirement of the electrical equipment. The electrical equipment insulating medium not only can be directly used in the electrical insulating equipment, but also has a relatively low greenhouse effect and can replace SF6 gas.

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14-04-2010 дата публикации

Converter station insulating co-operating design method of high-pressure direct-current power transmission system

Номер: CN0101694939A
Принадлежит:

A converter station insulating co-operating design method of a high-pressure direct-current power transmission system belongs to a high-pressure direct-current power transmission system analyzing method, and aims at simplifying calculating working capacity, avoiding excessive man-made interference, and guiding users to highly-effectively finish insulating co-operating analysis. The converter station insulating co-operating design method comprises the lightning arrester configuration step, the system analysis step and the insulating co-operating step. The converter station insulating co-operating design method greatly simplifies the calculating working capacity of insulating co-operating analysis, avoids excessive man-made interference factors of users, and guides users to highly-effectively finish insulating co-operating analysis through a guiding mode.

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09-09-2015 дата публикации

Power transmission line lightning stroke type identification method

Номер: CN104897958A
Принадлежит:

The invention provides a power transmission line lightning stroke type identification method and belongs to the technical field of electricity when divided according to international patent classification (IPC). The method is mainly to solve the problems of large measurement errors and inaccurate identification results due to the dependence on a conventional thunder positioning experience identification method, and provides new basic data support for the development of the lightning protection work of power transmission lines. The method is characterized by utilizing a monitoring terminal to obtain current traveling waves on wires of the power transmission lines at the moment of lightning stroke, deeply delving and analyzing electromagnetic transient characteristics of the current traveling waves, analyzing wave tail time of the current traveling waves, Fourier frequency spectrum, and probability distribution of the frequency, and finally, realizing accurate identification of the lightning ...

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07-07-2010 дата публикации

Metal resin anchoring rod body automatic thread-rolling conveyor

Номер: CN0101767170A
Принадлежит:

The invention discloses a metal resin anchoring rod body automatic thread-rolling conveyor, which belongs to the automatic thread-rolling conveyor. A rolling-over feeding mechanism, a chain conveying mechanism, a pneumatic leveling mechanism, a thread-rolling pushing mechanism and a rod throwing mechanism of the automatic thread-rolling conveyor are orderly connected to a frame; sensors are connected to the rolling-over feeding mechanism, the chain conveying mechanism, the pneumatic leveling mechanism, the thread-rolling pushing mechanism and the rod throwing mechanism respectively and are all connected with a PLC; the output end of an air compressor is connected with the rolling-over feeding mechanism, the pneumatic leveling mechanism, the thread-rolling pushing mechanism and the rod throwing mechanism; and a motor is connected with the chain conveying mechanism. The automatic thread-rolling conveyor has the advantages of improving machining accuracy and consistency, improving labor productivity ...

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17-09-2014 дата публикации

Line fault optimized positioning method based on measurement on distributed traveling waves

Номер: CN104049179A
Принадлежит:

The invention relates to a line fault optimized positioning method based on measurement on distributed traveling waves. According to the method, fault points are accurately positioned according to different positioning methods on the basis of current traveling wave information collected by a plurality of monitoring terminals distributed on a power transmission line. The method mainly includes the following steps that firstly, the monitoring terminals are distributed at different monitoring points of the line to collect the current traveling wave information; then a fault section where the fault points are located is determined on the basis of the current traveling wave information collected by the different monitoring points; finally, the actual transmission speed of the traveling waves is corrected under the situation of taking sag into consideration, the fault points are accurately positioned according to the different traveling wave positioning methods, and a final optimized positioning ...

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20-01-2016 дата публикации

Pipeline tapping device and use device's pipeline tapping structure

Номер: CN0204975423U
Принадлежит:

The utility model provides a pipeline tapping device, includes electric drill, electric drill supporting platform and platform stabilizing mean, electric drill supporting platform includes bottom plate, both sides support and roof, and the roof props through the collateral branch with the bottom plate to be connected, the electric drill is adorned on the roof, the axis perpendicular to roof of the drill bit of electric drill, platform stabilizing mean is the wedge, and wedge detachably fills in at the bottom plate and between by the trompil pipeline. One kind the pipeline tapping structure of pipeline tapping device, include by trompil pipeline, pipeline supporting platform and the pipeline tapping device, be equipped with pipeline positioning mechanism on the pipeline supporting platform, by the trompil pipeline on pipeline supporting platform to fix a position by pipeline positioning mechanism, pipeline tapping device suit on by the trompil pipeline and mutual position fixed, and the ...

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04-08-2023 дата публикации

Frequency offset estimation method and device and receiver

Номер: CN116545824A
Принадлежит:

The invention relates to the field of signal processing, and discloses a frequency offset estimation method and device and a receiver, and the method comprises the steps: carrying out the multi-time modulation information removal of a to-be-measured signal, and obtaining a first signal; performing N-point FFT (Fast Fourier Transform) on the first signal with the length of N to obtain a second signal; obtaining a coarse estimation value of relative decimal frequency offset corresponding to the second signal, and sequentially performing correction, N-point time domain zero padding and 2N-point FFT transformation on the first signal by using the coarse estimation value to obtain a third signal; obtaining a precise estimation value of relative decimal frequency offset corresponding to the third signal; and obtaining a frequency offset estimation value according to the maximum spectrum clue index value, the coarse estimation value, the fine estimation value, the sampling frequency and the modulation ...

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01-08-2023 дата публикации

Preparation method and application of lithium iron phosphate precursor or lithium iron phosphate and hydrogen

Номер: CN116514092A
Принадлежит:

The invention relates to the field of electrochemical materials, in particular to a synchronous continuous preparation method and application of a lithium iron phosphate precursor and hydrogen. According to the preparation method, iron metal is taken as a working electrode, a hydrogen evolution reaction counter electrode material is taken as a counter electrode, electrolysis is carried out in an acidic electrolyte or a neutral electrolyte, and hydrogen and a lithium iron phosphate precursor are prepared. The method has the advantages of low cost, high safety, good cycle performance, good reaction continuity, high yield and the like.

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25-08-2023 дата публикации

Large-scale low-delay large-bandwidth channel simulation device and method

Номер: CN116647288A
Принадлежит:

The invention discloses a large-scale low-delay large-bandwidth channel simulation device and method, and belongs to the technical field of wireless information transmission. According to the channel simulation device, the receiving calculation array is taken as a basic unit, and the digital synthesis unit and the radio frequency transmitting unit are added, so that the scale can be flexibly expanded when large-scale and large-bandwidth full-connection channel simulation is carried out, and the processing time delay is relatively small. The technical problems that in the prior art, flexible expansion is difficult and processing delay is large during large-scale and large-bandwidth full-connection channel simulation are solved.

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17-09-2014 дата публикации

Transmission line thunder leading width calculating method based on actually measured lightning stroke data

Номер: CN104050376A
Принадлежит:

The invention relates to a transmission line thunder leading width calculating method based on actually measured lightning stroke data. The transmission line thunder leading width is calculated according to actually measured transmission line body lightning stroke data and thunder positioning system monitoring data. The method mainly comprises the following steps that firstly, the lightning stroke frequency and the cloud-to-ground lightning density of a transmission line body are obtained according to the transmission line body lightning stroke data and the thunder positioning system monitoring data, and secondly, the equivalent thunder leading width is calculated, wherein the computational formula of the equivalent thunder leading width is shown as d=f/rho, and d, f and rho represent the equivalent thunder leading width, the transmission line body lightning stroke frequency and the cloud-to-ground lightning density respectively. In the actual engineering application, compared with an existing ...

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22-02-2012 дата публикации

Sealing detection device for waterway of mold

Номер: CN0101968396B
Принадлежит:

The invention relates to a sealing detection device for a waterway of a mold, comprising a base, an air tap and a rubber ring. A screw hole and an air inlet are arranged on the front surface of the base, and the air tap is arranged on the air inlet; and a groove with a diameter greater than that of the air inlet is arranged at the air inlet position on the back surface of the base, and the rubberring is arranged in the groove. The invention is suitable for various waterway structures, has the advantages of strong generality, rational design, simple structure and high accuracy, and is easy tooperate; and the detection device is low in cost and easy to manufacture, and can be widely applied to the mold manufacturing and repairing occasions.

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09-09-2015 дата публикации

Power transmission line lightning stroke frequency direct monitoring method

Номер: CN104897977A
Принадлежит:

The invention provides a power transmission line lightning stroke frequency direct monitoring method and relates to the technical filed of differentiated lightning protection of power transmission lines. The method is characterized by, to begin with, based on the on-line real-time travelling wave measuring technique, monitoring relevant information of traveling wave current of the power transmission lines; next, identifying traveling wave current waveforms of the power transmission lines struck by lightning and positioning lightning stroke positions based on the relevant information of the lightning stroke traveling wave current; then, carrying out sectional processing on the power transmission lines according to towers and poles; and finally, calculating the lightning stroke frequency of each section and drawing a lightning stroke frequency distribution diagram of the power transmission lines. The method not only is concise and feasible, but also can enable the conventional power transmission ...

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29-06-2011 дата публикации

Converter station insulating co-operating design method of high-pressure direct-current power transmission system

Номер: CN0101694939B
Принадлежит:

A converter station insulating co-operating design method of a high-pressure direct-current power transmission system belongs to a high-pressure direct-current power transmission system analyzing method, and aims at simplifying calculating working capacity, avoiding excessive man-made interference, and guiding users to highly-effectively finish insulating co-operating analysis. The converter station insulating co-operating design method comprises the lightning arrester configuration step, the system analysis step and the insulating co-operating step. The converter station insulating co-operating design method greatly simplifies the calculating working capacity of insulating co-operating analysis, avoids excessive man-made interference factors of users, and guides users to highly-effectively finish insulating co-operating analysis through a guiding mode.

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18-05-2011 дата публикации

Orange halving juice extractor

Номер: CN0102058141A
Принадлежит:

The invention discloses an orange halving juice extractor which comprises a frame, a hopper, a driving system, a conveying and halving system, a juice extracting system, a juice collecting tank and a peel bucket, wherein the conveying and halving system is arranged below the hopper and used for conveying a halved orange into the juice extracting system, the juice extracting system is arranged on a transporting path of the conveying and halving system, the juice extracting system comprises a first disk body and a second disk body which synchronously rotate at a first rotating speed, the second disk body is obliquely arranged relative to the first disk body, the first disk body is provided with a plurality of cup-shaped bodies, the second disk body is provided with a plurality of conical bodies corresponding to the cup-shaped bodies, and the conical bodies rotate along with the second disk body to compact the cup-shaped bodies and simultaneously rotate at a second speed relative to the second ...

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09-05-2023 дата публикации

Outdoor impulse current generator suitable for complex environment and horizontal structure of outdoor impulse current generator

Номер: CN116087700A
Принадлежит:

The invention discloses an outdoor impulse current generator suitable for a complex environment and a horizontal structure of the outdoor impulse current generator. The horizontal structure comprises a multi-stage capacitor and an insulating supporting structure which are arranged in an outer cover. Constructing an xyz coordinate system by taking the length direction of the outer cover as an x axis, the width direction as a y axis and the height direction as a z axis; the multiple stages of capacitors are distributed along the x direction, are parallel to the yOz surface, and are fixed on the insulating supporting structure; the insulation distance between each stage of capacitors is applied in the x direction. According to the invention, the structural positions of the multi-stage capacitors in the impulse current generator in the whole space coupling are changed, that is, the multi-stage capacitors are transversely and horizontally distributed, and the insulation distance between each ...

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28-05-2014 дата публикации

Method for constructing reinforced concrete pond

Номер: CN103821364A
Принадлежит:

The invention provides a method for constructing a reinforced concrete pond. The thickness of the pond wall of the pond ranges from 300 mm to 500 mm, and the thickness of the bottom of the pond ranges from 300 mm to 500 mm. The method includes the steps of foundation processing, pond steel bar installation, pond formwork installation, pond concrete pouring, post-pouring joint pouring and pond water testing. The pond formwork installation step comprises the steps of pond bottom formwork installation, pond wall formwork installation and pond bottom post-pouring joint water stopping steel plate formwork installation. The step of pond bottom post-pouring joint water stopping steel plate formwork installation includes the steps that a concrete belt which is 100 mm in width is poured through concrete with the same grade as that of a pond body in the middle of the lower portion of a horizontal water stopping steel plate of the bottom of the pond, and the concrete belt serves as a formwork on the ...

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11-02-2015 дата публикации

Impact test low temperature instrument

Номер: CN104345000A
Принадлежит:

The invention relates to an impact test low temperature instrument which can be used for freezing and heat preservation of various impact samples. The impact test low temperature instrument is provided with an automatic liquid storage device and comprises an impact test low temperature instrument body, wherein the side face of the impact test low temperature instrument body is provided with an axial flow fan. The impact test low temperature instrument body comprises a step-shaped outer shell. The impact test low temperature instrument is characterized in that: the step of the outer shell is provided with a storage box, a box cover provided with an exhaust hole is arranged on the storage box, a box cover sealing strip and a lock catch are arranged between the storage box and the box cover, an inlet-outlet pipe, a power motor and a control system are arranged between the storage box and a freezing tank, and the power motor and the control system control operation of the inlet-outlet pipe.

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09-02-2011 дата публикации

Sealing detection device for waterway of mold

Номер: CN0101968396A
Принадлежит:

The invention relates to a sealing detection device for a waterway of a mold, comprising a base, an air tap and a rubber ring. A screw hole and an air inlet are arranged on the front surface of the base, and the air tap is arranged on the air inlet; and a groove with a diameter greater than that of the air inlet is arranged at the air inlet position on the back surface of the base, and the rubber ring is arranged in the groove. The invention is suitable for various waterway structures, has the advantages of strong generality, rational design, simple structure and high accuracy, and is easy to operate; and the detection device is low in cost and easy to manufacture, and can be widely applied to the mold manufacturing and repairing occasions.

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27-06-2023 дата публикации

Polarization code performance estimation-based signal-to-noise ratio evaluation method, system and equipment

Номер: CN116346282A
Принадлежит:

The invention discloses a signal-to-noise ratio evaluation method, system and equipment based on polarization code performance estimation, and the method comprises the steps: obtaining a target receiving signal obtained after an original signal is transmitted through a target transmission channel, and the original signal comprises a signal obtained after target original information is coded based on a polarization code method; calculating a target decoding error rate of the target receiving signal; and determining a target signal-to-noise ratio corresponding to the target decoding error rate based on a preset corresponding relationship between the decoding error rate and the signal-to-noise ratio. According to the method, the target signal-to-noise ratio corresponding to the target decoding error rate can be determined only based on the preset corresponding relation between the decoding error rate and the signal-to-noise ratio, so that the signal-to-noise ratio can be quickly evaluated ...

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25-07-2012 дата публикации

Orange halving juice extractor

Номер: CN0102058141B
Принадлежит:

The invention discloses an orange halving juice extractor which comprises a frame, a hopper, a driving system, a conveying and halving system, a juice extracting system, a juice collecting tank and a peel bucket, wherein the conveying and halving system is arranged below the hopper and used for conveying a halved orange into the juice extracting system, the juice extracting system is arranged on a transporting path of the conveying and halving system, the juice extracting system comprises a first disk body and a second disk body which synchronously rotate at a first rotating speed, the seconddisk body is obliquely arranged relative to the first disk body, the first disk body is provided with a plurality of cup-shaped bodies, the second disk body is provided with a plurality of conical bodies corresponding to the cup-shaped bodies, and the conical bodies rotate along with the second disk body to compact the cup-shaped bodies and simultaneously rotate at a second speed relative to the second ...

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07-07-2023 дата публикации

Image retrieval method, electronic equipment and storage medium

Номер: CN116401392A
Принадлежит:

The invention provides an image retrieval method, which not only performs retrieval in an original image database according to a retrieval condition input by a user, but also displays an original image meeting the image retrieval condition for the user, and the user selects an intermediate image with a person needing to be retrieved by dragging. Compared with a method for retrieving the original image database only through a retrieval condition input by a user, the method has the advantages that secondary retrieval is carried out on the original image database through the picture dragged by the user, the accuracy of the retrieved image is improved, and the user experience is improved. Therefore, the retrieved associated image better meets user requirements, and the user experience is improved.

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23-11-2011 дата публикации

Metal resin anchoring rod body automatic thread-rolling conveyor

Номер: CN0101767170B
Принадлежит:

The invention discloses a metal resin anchoring rod body automatic thread-rolling conveyor, which belongs to the automatic thread-rolling conveyor. A rolling-over feeding mechanism, a chain conveying mechanism, a pneumatic leveling mechanism, a thread-rolling pushing mechanism and a rod throwing mechanism of the automatic thread-rolling conveyor are orderly connected to a frame; sensors are connected to the rolling-over feeding mechanism, the chain conveying mechanism, the pneumatic leveling mechanism, the thread-rolling pushing mechanism and the rod throwing mechanism respectively and are all connected with a PLC; the output end of an air compressor is connected with the rolling-over feeding mechanism, the pneumatic leveling mechanism, the thread-rolling pushing mechanism and the rod throwing mechanism; and a motor is connected with the chain conveying mechanism. The automatic thread-rolling conveyor has the advantages of improving machining accuracy and consistency, improving labor productivity ...

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18-07-2023 дата публикации

Code construction method and device of code rate compatible polarization code cluster, and storage medium

Номер: CN116455408A
Принадлежит:

A code construction method and device for a code-rate-compatible polar code cluster and a storage medium perform universal code construction for a polar code codeword set containing a plurality of code lengths and code rates, firstly convert a code construction process of a code-rate-compatible polar code into a Markov decision process, and then perform code construction for a target polar code cluster. A multi-target reinforcement learning algorithm is adopted to carry out coding construction, under the condition of serial cancellation SC decoding, a reconstruction-assisted rapid construction algorithm is adopted, under the condition of list serial cancellation SCL decoding, a joint construction algorithm oriented to an SCL decoder is adopted, and finally a high-reliability general information bit sequence obtained through construction is obtained. And the error correction capability of the target code rate compatible polarization code cluster is improved.

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