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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 38. Отображено 38.
03-10-2019 дата публикации

INTERFRAME REGISTRATION AND ADAPTIVE STEP SIZE-BASED NON-UNIFORMITY CORRECTION METHOD FOR INFRARED IMAGE

Номер: WO2019183843A1
Принадлежит:

An interframe registration and adaptive step size-based non-uniformity correction method for an infrared image, comprising: first calculating a normalized cross-power spectrum of n-th and (n-1)-th original infrared images with the non-uniformity, and then calculating a horizontal relative displacement and a vertical relative displacement of the n-th and (n-1)-th original infrared images with the non-uniformity; calculating a space variance and a time variance of each pixel of the n-th original infrared image with the non-uniformity, using the obtained space variance and time variance to calculate an adaptive iterative step size of each pixel of the n-th original infrared image with the non-uniformity, and using the iterative step size to update a gain correction coefficient and a bias correction coefficient; finally, performing non-uniformity correction on the pixel in an overlapping area of the n-th and (n-1)-th original infrared images with the non-uniformity.

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31-10-2019 дата публикации

SUBSTANDARD OIL PRODUCT CONVERSION PROCESS

Номер: WO2019205681A1
Принадлежит:

A substandard oil product conversion process. At least one of an iron oxide compound, an iron oxide compound desulfurization waste agent, or a regenerate thereof is employed as a catalyst, the molar ratio of elemental iron and elemental sulfur in a reaction system is controlled, and a free radical polycondensation in a carbonylation-blocking cracking process is utilized in the presence of CO, implemented is a conversion and hydrogenation with active hydrogen of CO and water. A substandard oil product can directly undergo a conversion reaction, the liquefaction yield and the calorific value of the oil product are increased, and no wastewater is produced in large volumes when the reaction is completed.

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04-07-2019 дата публикации

HYDROLYSIS HYDROGENATION PROCESS FOR BIOMASS

Номер: WO2019128867A1
Автор: LIN, Ke, LI, Lin, GUO, Lixin
Принадлежит:

A hydrolysis hydrogenation process for a biomass or coal and a biomass, the preparation steps for a slurry therein are as follows: sequentially drying, preliminarily pulverizing, compressing and secondarily pulverizing a biomass, then mixing with a catalyst to obtain a mixture, and adding the mixture to an oil product/water for grinding and to make a slurry so as to obtain a biomass/coal slurry. In the process, the biomass is first compressed and then secondarily pulverized; by means of compressing the biomass, the loose biomass successively undergoes stages of rearrangement, mechanical denaturation, shaping rheology and so on such that the volume of the biomass is greatly reduced, thereby reducing the porosity of the biomass, increasing the density and specific gravity of the biomass to enable the biomass to disperse in an oil product more easily, thus increasing the content thereof in the oil product, increasing the concentration of a reaction material, increasing the amount of biomass ...

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31-10-2019 дата публикации

CONVERSION PROCESS FOR ORGANIC MATTER

Номер: WO2019205682A1
Принадлежит:

Disclosed is a conversion process for an organic matter, involving using at least one of an iron oxygen compound, a desulfurization waste agent of the iron oxygen compound or a regenerate of the desulfurization waste agent of the iron oxygen compound as a catalyst, using an aqueous slurry, and at the same time, controlling the mole ratio of an iron element to a sulfur element in a reaction system, such that the free radical polycondensation of the organic matter during cracking can be effectively blocked, in the presence of CO, by means of carbonylation, and thus achieving the hydrogenation of an active hydrogen of shifting CO and water. In the conversion reaction, the organic matter, in particular a biomass solid, can be directly subjected to a conversion reaction without dehydration, water can be additionally added to a biomass liquid or a mineral oil, the heat productivity of a prepared oil product can also be improved while the liquefaction yield is improved, and there is no large amount ...

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18-08-2023 дата публикации

Anti-interference yarn drying equipment

Номер: CN116608666A
Автор: GUO LIXIN, HU FENGLIAN
Принадлежит:

The invention relates to the field of spinning, in particular to anti-interference yarn drying equipment. The problems that space dyeing yarn is low in drying efficiency and long in time consumption, a large number of yarn is stacked together, drying is not uniform, and heat is not fully utilized are solved. According to the technical scheme, the anti-interference yarn drying equipment comprises a bottom frame, a drying box and the like; a drying box is mounted on the upper surface of the underframe. According to the yarn drying device, a hot air circulation cavity is formed through the drying box, an arc-shaped blocking piece and a concave plate, heat is recycled, yarn is in a certain tensioning state through the arc-shaped plate, the yarn is rotated when being dried in the drying box, and therefore the drying efficiency is improved, the drying effect is enhanced, and the drying effect is improved. And comprehensive drying of the yarn is achieved.

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20-07-2016 дата публикации

Greenhouse

Номер: CN0205385745U
Принадлежит:

... 种温室大棚,属于温室大棚自动控制领域,本实用新型为解决现有温室大棚存在成本较高或效果不佳的问题。本实用新型包括温度传感器、光照传感器、湿度传感器、时钟模块、加温装置、调光控制器、喷淋系统、保暖卷帘系统、控制器和多个调光照明灯;调光照明灯均布在温室大棚的顶棚上,用于照射大棚内植物;温度传感器监测大棚内温度信息,控制器根据该温度信息启停加温装置;光照传感器监测大棚内的光照信息,控制器通过调光控制器调整所有调光照明灯的亮度强弱;湿度传感器监测大棚土壤的湿度信息,控制器根据该湿度信息启停喷淋系统;控制器根据时钟信息控制保暖卷帘系统在白天时卷起大棚的保暖被,控制保暖卷帘系统在晚间时打开大棚的保暖被。 ...

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29-08-2023 дата публикации

Method, system, equipment and medium for measuring polarization spectral radiation characteristics of thermodynamic-chemical non-equilibrium gas-solid coupling tail flame

Номер: CN116663450A
Принадлежит:

The invention discloses a method, a system, equipment and a medium for measuring polarization spectrum radiation characteristics of thermodynamic-chemical unbalanced gas-solid coupled tail flame, and the method comprises the following steps: establishing a polarization spectrum radiation model of the gas-solid coupled tail flame by establishing a gas-solid coupled multi-source vector spectrum radiation transfer equation and utilizing a spherical harmonic discrete coordinate method; according to the model, the influence of a chemical fluorescence item is considered, the coupling influence of a gas phase-solid phase extinction characteristic on a radiation transfer equation is increased, and the influence of a heat source radiation item, a chemical fluorescence radiation item and a scattering item of solid particles generated by combustion of a solid propellant on a spectral radiation transfer equation is considered; the system, the equipment and the medium are used for realizing the method ...

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23-06-2023 дата публикации

Thermal management system, thermal management method thereof, thermal management equipment and storage medium

Номер: CN116315290A
Принадлежит:

The invention discloses a heat management system, a heat management method thereof, heat management equipment and a storage medium, the heat management method is applied to the heat management system, the heat management system comprises a cooling liquid circulation loop, and the cooling liquid circulation loop is provided with a heat exchange area used for conducting heat exchange with the heat management equipment. The heat management method of the heat management system comprises the steps that the mass flow of cooling liquid in a cooling liquid circulation loop and the first temperature difference of the cooling liquid between the output side and the input side of a heat exchange area are obtained; determining target heat provided by the heat management system to the heat management equipment by using the mass flow and the first temperature difference; a heat difference value between the target heat and rated heat is obtained, wherein the rated heat is used for representing standard ...

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13-06-2023 дата публикации

Fire-fighting method, device and equipment for environmental test incubator, storage medium and product

Номер: CN116251320A
Принадлежит:

The invention is applicable to the technical field of test application, and provides a fire fighting method, device and equipment for an environmental test incubator, a storage medium and a product, and the method comprises the following steps: based on sensing data of a first sensor, under the condition that a sample in the environmental test incubator is determined to be in an abnormal state, controlling a fire extinguishing device to start, after the fire extinguishing device is stopped, the second sensor is controlled to move into the environment test temperature box; and on the basis of the second sensor, under the condition that it is detected that the high-temperature point exists in the environment testing temperature box, the fire extinguishing device is controlled to be started again until it is not detected that the high-temperature point exists in the environment testing temperature box on the basis of the second sensor.

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27-05-2010 дата публикации

AUTOMATIC-CONTROL FLUID JET GUIDE LIFT PUMP

Номер: WO2010057413A1
Автор: GUO, Lixin, LI, Xiang
Принадлежит:

An automatic-control fluid jet guide lift pump comprises a fluid jet guide device (1) and a delivery pump (2). On the delivery pump (2) is installed a liquid lever sensor (3). The delivery pump (2) is provided with a gas outlet (4) on its upper part, which is connected in a gastight manner with the fluid jet guide device (1) via a gas suction pipe (9).

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28-05-2020 дата публикации

FEATURE FUSION AND DENSE CONNECTION BASED INFRARED PLANE TARGET DETECTION METHOD

Номер: WO2020102988A1
Принадлежит:

An infrared plane target detection method based on feature fusion and dense connection, comprising: constructing an infrared image dataset containing a target to be recognized, calibrating the position and kind of said target to be recognized in the infrared image dataset, and obtaining an original known label image; dividing the infrared image dataset into a training set and a verification set; performing image enhancement preprocessing on images in the training set and performing feature extraction and feature fusion, obtaining a classification result and a bounding box through a regression network; performing a loss function calculation on the classification result and the bounding box with the original known label image, and updating parameter values of convolutional neural network (CNN); repeating iteration update on the CNN parameters until the error is small enough or the number of iterations reaches a set upper limit; and processing images in the verification set through the trained ...

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30-05-2023 дата публикации

Cloud-based diabetes health data early warning method and system

Номер: CN116189896A
Принадлежит:

The invention discloses a cloud-based diabetes health data early warning method and system. The method comprises the following steps: calling disease symptom characteristics and reference sign data of different types of diabetes at each stage from a database, and storing the disease symptom characteristics and reference sign data in a cloud server; detecting physical sign parameters of a target person in real time through a portable wearable device of the target person, and uploading the real-time physical sign parameters to the cloud server; whether the physical sign parameters are abnormal or not is judged, and a physical sign monitoring schedule is set for the target person according to the judgment result; reminding a target person to perform periodic sign measurement according to the sign monitoring schedule to obtain a sign measurement result; and comparing the physical sign measurement result with reference physical sign data of different types of diabetes mellitus, determining the ...

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13-06-2023 дата публикации

Visualization system for realizing propagation of short waves in ionized layer and propagation path calculation method

Номер: CN116257902A
Принадлежит:

The invention discloses a visualization system for realizing propagation of short waves in an ionosphere, and the system comprises an input module which is used for a user to input an application condition; the integral algorithm module is used for carrying out modeling processing on a background environment of short-wave propagation according to application conditions, constructing spatial distribution of refractive indexes by adopting a magnetic ion theory, and solving a short-wave ray differential equation by utilizing a Runge-Kutta method to obtain wave vectors and coordinate vectors at different points on a ray path; and the output module is used for connecting different points on the ray path, generating three-dimensional short wave propagation tracks matched with input application conditions one by one, and obtaining a two-dimensional image of the ground distance of propagation of the short wave in the ionized layer along with height change by using a ground distance formula. In ...

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15-08-2023 дата публикации

Adaptive modeling method based on Gaussian process regression

Номер: CN116595862A
Принадлежит:

The invention discloses a self-adaptive modeling method based on Gaussian process regression (GPR), which comprises the following steps of: determining a sample point sampled next time by taking an extreme point and an inflection point of Gaussian process regression (GPR) modeling of a sample sampled last time as reference points, and verifying and finely adjusting an agent model through multiple times of sampling process and modeling process iteration, so as to obtain an adaptive modeling result. And obtaining a final prediction agent model. And fine but important local features (such as narrow peaks or zero points) can be captured in detail, so that the time and hardware cost required by a high-precision simulation model are greatly reduced.

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04-07-2019 дата публикации

PROCESS FOR ONE-POT LIQUEFACTION OF BIOMASS OR COAL AND BIOMASS

Номер: WO2019128866A1
Автор: LIN, Ke, LI, Lin, GUO, Lixin
Принадлежит:

Disclosed is a process for the one-pot liquefaction of a biomass or coal and a biomass, the process comprising: first formulating a slurry containing a catalyst, a vulcanizing agent, and a biomass (and coal), and then introducing hydrogen gas into the slurry for a reaction. The formulation step for the slurry involes: sequentially drying, primarily pulverizing, compressing and secondarily pulverizing a biomass (and coal), then mixing same with a catalyst and a vulcanizing agent to obtain a mixture, and adding the mixture to an oil product for grinding and pulping to obtain a biomass slurry. By means of the treatment process of first compressing and then secondarily pulverizing straw, the volume of the straw is greatly reduced, thereby facilitating the dispersion thereof in the oil product, increasing the concentration of the reaction material, and improving the delivery amount of the biomass per unit time by means of a pump; furthermore, the conversion rate of the biomass is also improved ...

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01-08-2023 дата публикации

Reverse shunting device for dense medium coal separation density control

Номер: CN116510879A
Принадлежит:

The invention belongs to the technical field of dense medium coal separation, and particularly relates to a reverse shunting device for dense medium coal separation density control. Comprising a medium drainage screen, the medium drainage screen is divided into a thin medium section and a closed medium section, the thin medium section is fixedly connected with a first main pipe, the other end of the first main pipe is communicated with a thin medium barrel, the closed medium section is fixedly connected with a second main pipe, the other end of the second main pipe is communicated with a closed medium barrel, and the upper portion of the second main pipe is fixedly connected with one end of a shunt branch pipe. The other end of the shunting branch pipe is fixedly connected with the lower part of a main pipe I, and the upper part of the main pipe I is fixedly connected with one end of a reverse shunting pipe; according to the invention, the problem that the density of suspension liquid in ...

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18-06-2020 дата публикации

DETECTION AND POSITIONING METHOD FOR TRAIN WATER INJECTION PORT

Номер: WO2020118621A1
Принадлежит:

A detection and positioning method for a train water injection port, the method involving: collecting a train water injection port video image, and carrying out threshold segmentation on the train water injection port video image to obtain a binarized train water injection port video image; processing the binarized train water injection port video image and matching with the train water injection port template image, detecting the position of the water injection port in the train water injection port video image, and comparing same with a preset position range where the water injection port is located; and if the two match, transmitting a matching valid signal to a mechanical device control module so as to control the mechanical device to stop moving and control the starting and stopping of water injection. By means of the train water injection port detection and positioning method, the automatic detection and identification of a train water injection port can be realized, and a stopped ...

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29-11-2012 дата публикации

ANALYSIS METHOD AND DEVICE FOR PROPAGATION CHARACTERISTICS OF ELECTROMAGNETIC WAVE

Номер: WO2012159330A1
Принадлежит:

The embodiments of the present invention provide an analysis method and device for propagation characteristics of radiation. The method mainly comprises: establishing a virtual source tree including multi-level virtual sources according to pre-stored environmental information and position of an emission source, inquiring the virtual source tree according to the positions of the emission source and a reception point, obtaining the propagation path from the emission source to the reception point, and calculating and combining field intensities of the reception point where electromagnetic wave of each propagation path arrives, thereby obtaining the corresponding field intensity of the reception point. With the embodiments of the present invention, a new virtual source tree including multi-level virtual sources and with a new binary tree structure is established, and a more accurate propagation model can be established according to the virtual source tree, thereby effective analysis of propagation ...

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07-04-2023 дата публикации

Ship wake SAR image detection method and device

Номер: CN115932854A
Принадлежит:

The invention discloses a ship wake SAR (Synthetic Aperture Radar) image detection method and device. The method comprises the following steps: acquiring ship Kelvin wake data information; the ship Kelvin wake data information comprises a speed, a sailing direction and ship body parameters; processing the ship Kelvin wake data information to obtain a wake geometric model; calculating a radar backscattering coefficient of the sea surface by using a dual-scale method to obtain a scattering echo; the radar backscattering coefficient of the sea surface comprises a mirror image scattering coefficient and a Bragg scattering coefficient; processing the scattering echoes by using a distance Doppler SAR imaging algorithm to obtain SAR imaging information of the ship Kelvin wake data; sAR imaging information of Kelvin wake data is detected by using a generalized maximum and minimum concave sparse regularization method, and ship wake position information is obtained. According to the method, the Kelvin ...

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25-07-2023 дата публикации

Valve clack structure capable of adjusting valve circulation characteristics of low-temperature stop valve

Номер: CN116480792A
Принадлежит:

The invention relates to a valve clack structure capable of adjusting valve circulation characteristics of a low-temperature stop valve, which comprises a valve body, an on-off valve clack is connected to an on-off opening of the valve body, a sealing piece used for sealing the on-off opening is embedded below the valve clack, a valve rod is connected to the upper portion of the valve clack, the upper portion of the valve rod is connected with a valve cover, and the valve cover is connected with the valve body. A connecting rod is connected to the lower portion of the valve clack, a plurality of clamping grooves are formed in the radial direction of the connecting rod and distributed in the connecting rod in a staggered mode, a plurality of clamping assemblies are connected into the clamping grooves, and adjusting heads used for different circulation characteristics are connected to the lower portion of the connecting rod through the clamping assemblies. The adjusting head can be rapidly ...

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22-08-2023 дата публикации

Yarn drying equipment with dustproof function

Номер: CN116625091A
Автор: GUO LIXIN, HU FENGLIAN
Принадлежит:

The invention relates to the field of yarn production, in particular to yarn drying equipment with a dustproof function. The invention discloses yarn drying equipment with a dustproof function. The yarn drying equipment comprises a fixing frame, a first shell, a second shell and the like; a plurality of flamethrowers capable of sintering and cleaning yarn hairiness are arranged on the inner side of the first shell; a first washboard capable of being adjusted and moved in a lifting mode is arranged on the inner side of the first shell. The first washboard drives the electrode plate to attract yarn hairiness with static electricity, the hairiness is erected to facilitate sintering cleaning, the yarn continues to advance to the position below the flame projector, and the hairiness on the yarn is sintered and cleaned through flame ejected by the flame projector.

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21-07-2023 дата публикации

Pneumatic double-station ultralow-temperature valve normal-temperature and low-temperature pressure test experiment table

Номер: CN116465620A
Принадлежит:

The invention relates to a pneumatic double-station ultralow-temperature valve normal-temperature and low-temperature pressure test experiment table which comprises a support, an air cylinder is connected to the upper portion of the support, a driving shaft of the air cylinder penetrates through the support to be in driving connection with a guide connecting plate, the guide connecting plate is connected with a guide sliding block, the lower portion of the support is connected with a guide sliding rail, and the lower portion of the guide sliding rail is connected with an air cylinder. The guide sliding block is slidably connected along the guide sliding rail, the guide connecting plate is connected with a pressing block, the lower portion of the support is connected with an air inlet connecting plate, the air inlet connecting plate is connected with an air inlet connecting port, and the upper end of the air inlet connecting port corresponds to the pressing block and is in press fit connection ...

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28-04-2023 дата публикации

Polymer, preparation method of polymer, temporary plugging agent and preparation method of temporary plugging agent

Номер: CN116023584A
Принадлежит:

The invention relates to a polymer and a preparation method thereof, and a temporary plugging agent and a preparation method thereof, and belongs to the field of oilfield chemistry. The preparation method of the polymer disclosed by the invention comprises the following step: enabling dimethylaminoethyl methacrylate, cyclohexyl methacrylate, allyl propanesulfonic acid and bromododecane to react in the presence of a first initiator to obtain the polymer. The preparation method of the polymer is simple to operate, and when the prepared polymer is used for preparing the polymer temporary plugging agent, rigid groups are introduced into polymer chains, so that the mechanical damage resistance of the temporary plugging agent in the granulation process can be enhanced, molecular chains of the temporary plugging agent can be more easily entangled, the dissolution time of the temporary plugging agent can be controlled, and the stability of the temporary plugging agent is improved. In addition, ...

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07-04-2023 дата публикации

Band model-based boosting section rocket jet flame infrared spectrum prediction method, system and equipment and medium

Номер: CN115935500A
Принадлежит:

The invention relates to a boosting section rocket jet flame infrared spectrum prediction method, system and device based on a belt model, and a medium. A computational fluid mechanics method is adopted to calculate flow field characteristics such as jet flame temperature, pressure intensity and component concentration of a multi-stage boosting rocket, a statistical narrow-band model is adopted to solve radiation characteristic parameters of high-temperature gas on a jet flame baggage volume branch path, and then characteristics such as dynamic jet flame infrared spectrum radiation intensity and radiation images are obtained through calculation; the method can predict the infrared spectrum signal which is time-varying along with the trajectory and has a wide spectral band range, and improves the prediction capability of the jet flame infrared spectrum radiation of the hypersonic aircraft in the boosting process.

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02-05-2023 дата публикации

Vegetation-containing ground electromagnetic scattering coefficient calculation method

Номер: CN116050082A
Принадлежит:

The invention provides a vegetation-containing ground electromagnetic scattering coefficient calculation method, and belongs to the field of electromagnetic scattering, and the method comprises the steps: obtaining large-scale rough geometric contour information, vegetation layer parameters and rough ground parameters of a vegetation-containing ground; scattering units are used for carrying out space division on the ground containing vegetation, and each scattering unit is formed by covering a layer of random medium above a composite surface modulated by large-scale roughness and small-scale roughness; according to the information and the parameters, the FKA-FIEM is adopted to calculate the electromagnetic scattering coefficient of each scattering unit, and then the average value of the total electromagnetic scattering coefficients of the vegetation-containing ground is obtained by averaging the electromagnetic scattering coefficients of all the scattering units. According to the method ...

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07-07-2023 дата публикации

Unmanned tallying robot and Internet of Things control system thereof

Номер: CN116394890A
Принадлежит:

The invention discloses an unmanned tallying robot and an Internet of Things control system thereof, and relates to the technical field of intelligent robots. The unmanned tallying robot and the Internet of Things control system thereof comprise a box body, a lower gasket is fixedly arranged on the outer wall of the lower end of the box body, a grounding roller is hinged to one side of the lower gasket, a buffer assembly is fixedly arranged at the top of the box body, the box body is connected with an upper gasket through the buffer assembly, and a return part is arranged on the outer wall of the box body. When the robot box body needs to be remotely returned after being toppled over, a user can extend a first electric telescopic rod to abut against a connecting plate, at the moment, a sliding pin at the end of the first electric telescopic rod slides in a sliding hole in the connecting plate, and the sliding pin forces the connecting plate and a second electric telescopic rod to incline ...

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27-06-2023 дата публикации

Intelligent control device for adding slime water flocculant

Номер: CN116332306A
Принадлежит:

The invention provides an intelligent control device for coal slime water flocculant adding, and relates to the field of intelligent feeding control devices.The intelligent control device comprises a U-shaped drainage channel, two U-shaped mounting frames are symmetrically welded to the front end and the rear end of the U-shaped drainage channel, and six connecting mounting holes are formed in each U-shaped mounting frame; the U-shaped drainage channel is connected with a coal washing muddy water discharge channel pipe through two U-shaped mounting frames; two mounting supports are symmetrically supported at the top ends of the left side wall and the right side wall of the rear half section of the U-shaped drainage channel through screw locking, and each mounting support is composed of an upper longitudinal support mounting plate, a lower longitudinal support mounting plate and two vertical support supporting plates welded between the two longitudinal support mounting plates in a front-back ...

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04-04-2023 дата публикации

Marine environment parameter inversion model construction method and device

Номер: CN115906667A
Принадлежит:

The invention relates to a marine environment parameter inversion model construction method and device. The method comprises the following steps: constructing a sea surface backscattering coefficient sample set; normalizing the sea surface backscattering coefficient sample set and dividing the sea surface backscattering coefficient sample set into a training sample set and a test sample set; performing parameter optimization on the support vector machine by using an improved particle swarm algorithm based on a polymerization degree decision; training the support vector machine by using the training sample set to establish a marine environment parameter inversion model; and testing the marine environment parameter inversion model by using the test sample set. According to the marine environment parameter inversion model construction method and device provided by the invention, the constructed marine environment parameter inversion model has a good inversion result.

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02-05-2023 дата публикации

Method for predicting conductor target RCS

Номер: CN116047448A
Принадлежит:

The invention discloses a method for predicting conductor target RCS (radar cross section), which comprises the following steps: fusing a physical optical method (PO) as prior information into Gaussian process regression, constructing a new GPR covariance function by adopting spectrum asymptotic representation of a linear covariance function and a steady-state covariance function, designing an initialization method based on empirical spectral density, and predicting the RCS of a conductor target. And finally, a universal and high-precision RCS prediction model is obtained. By introducing spectrum asymptotic representation of a stationary covariance function, the limitation of adopting a period hypothesis can be eliminated, so that GPR can adaptively represent RCS features of targets with simple and complex shapes, and higher prediction precision is provided; the method is initialized, convergence performance in the training process can be ensured, and prediction precision is improved.

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23-06-2023 дата публикации

Outdoor field target RCS measurement and medium-far field transformation system and measurement method thereof

Номер: CN116299270A
Принадлежит:

The invention discloses an outdoor field target RCS (radar cross section) measurement and medium-far field transformation system, which comprises a vector network analyzer, an output port of the vector network analyzer is connected with an input port of a power amplifier, and an output port of the power amplifier is connected with a transmitting antenna. A receiving port of the vector network analyzer is connected with an output port of the low-noise power amplifier, an input port of the low-noise power amplifier is connected with the receiving antenna, the vector network analyzer is connected with the computer and the power module, the computer is connected with the Raspberry Pi and the power module, the Raspberry Pi is connected with the testing platform and the power module, and the Raspberry Pi is connected with the testing platform and the power module. The transmitting antenna and the receiving antenna are arranged on the test platform. The invention further discloses an outdoor field ...

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25-08-2023 дата публикации

Method for calculating propagation of electromagnetic waves in plasma based on refraction approximation

Номер: CN116644602A
Принадлежит:

The invention discloses a method for calculating propagation of electromagnetic waves in plasma based on refraction approximation. The method comprises the following steps: dividing surface elements through an established calculation model; generating a ray path by using the solved mirror point; judging whether the rays are valid; refraction approximates the propagation path of each effective ray; performing electric field tracking on the electric field of each effective ray; and calculating the total electric field of receiving antenna position points. According to the method, refraction approximation is carried out on the propagation path of the electromagnetic wave in the plasma, the ray propagation path and the calculation process are simplified, the calculation area of the method is larger, the calculable incident electromagnetic wave frequency is higher, the needed calculation resources are fewer, and the calculation speed is higher.

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20-07-2016 дата публикации

Forest seedling culturing device

Номер: CN0205385741U
Принадлежит:

... 林木育苗装置,属于育苗领域,本实用新型为提供种既能够培育林木幼苗又方便运输,大大的提高了苗木的成活率的林木育苗装置。本实用新型包括左侧板、右侧板、后侧板、支撑间隔板、运输底板、四只轮子和前挡板;左侧板、右侧板和后侧板合围成向前开口的U型结构,支撑间隔板将三者合围区域分成上下两部分,支撑间隔板与三者嵌固在起;运输底板的下表面对称设置有四只轮子;运输底板依靠四只轮子沿支撑间隔板向U型合围区域内部滑动,前挡板从上至下插入;前挡板的内侧壁与运输底板的前侧边紧靠在起。为可拆卸结构,苗木培养完成后,小型运输车将运输底板连同土壤、培养好的幼苗起运至目的地进行移栽。 ...

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14-04-2023 дата публикации

Intelligent parking indicating method for multiple types of parking spaces

Номер: CN115965146A
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The invention relates to the technical field of berth allocation, and provides a multi-type berth intelligent berth assignment method, which comprises the following steps: step 100, obtaining a berth application sent by a ship company, and reading port basic information; step 200, constructing an optimization target according to the berth application and the basic information of the port; step 300, determining an initial population scale, and generating a parking scheme initial population by adopting one of a first generation mode, a second generation mode and a third generation mode; and step 400, performing adjustment and optimization on the generated initial population of the parking scheme in combination with an optimization target, and determining an optimal parking scheme. According to the invention, multi-type intelligent parking can be realized, and the parking efficiency is improved.

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18-04-2023 дата публикации

Cylinder deactivation device, engine and vehicle

Номер: CN115977810A
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The invention relates to a cylinder deactivation device, an engine and a vehicle. An air distribution mechanism in the cylinder deactivation device comprises a rotating shaft, a shaft sleeve and a cam. The shaft sleeve is sleeved outside the rotating shaft, and the cam is arranged on the shaft sleeve. The rotating shaft is configured to be rotatable about its axis. The adjusting mechanism is configured to be capable of adjusting the relative position of the shaft sleeve and the rotating shaft so that the shaft sleeve can be switched between the locking position and the unlocking position. Wherein the cylinder deactivation device is configured to have a working state and a cylinder deactivation state. The shaft sleeve is located at the locking position, the cylinder deactivation device is in the working state, the shaft sleeve and the rotating shaft are locked, and the cam can be driven by the rotating shaft to rotate so that the air valve can be opened or closed. The shaft sleeve is located ...

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23-06-2023 дата публикации

Automatic trolley for drawing internal and external field electromagnetic maps and drawing method

Номер: CN116298543A
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The invention discloses an internal and external field electromagnetic map drawing automatic trolley which comprises a mobile trolley body, a radio frequency layer and a communication layer are arranged on the mobile trolley body, the communication layer is located above the radio frequency layer, the radio frequency layer comprises a spectrum analyzer and a computer which are connected through a network cable, and the communication layer comprises a receiving and transmitting antenna and a power amplifier. According to different measurement frequencies and sampling requirements, synchronous control of motion and electromagnetic measurement is realized, and the measurement precision is improved. The invention further discloses an automatic trolley indoor electromagnetic map drawing method, by applying the automatic trolley for drawing the internal and external field electromagnetic maps, waves emitted by the transmitting antenna and waves reflected by the inner wall of a darkroom interfere ...

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25-04-2023 дата публикации

Conductor target RCS prediction method combining machine learning and physical mechanism

Номер: CN116011588A
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The invention discloses a conductor target RCS prediction method combining machine learning and a physical mechanism. The conductor target RCS prediction method is specifically implemented according to the following steps: step 1, infinitely approaching a conductor target single-station RCS calculation formula under a PO mechanism to the form of an SVR function in form by using an analogy method; searching a most suitable kernel function according to an SVR function form combined with physical prior; 2, designing test process sampling and preprocessing to obtain a training data set; 3, training the IPOI-SVR model proposed in the step 1 according to the data set sampled in the step 2, and obtaining an approximate function for predicting the RCS of the conductor target; and 4, predicting the RCS of the conductor target at different azimuth zenith angles theta according to the trained approximation model. According to the method, the problem of low precision caused by purely relying on a physical ...

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28-04-2023 дата публикации

Method, device and application of indoor electromagnetic propagation prediction model

Номер: CN116029195A
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The invention belongs to the technical field of radio wave propagation prediction model construction, and discloses an indoor electromagnetic propagation prediction model construction method, system, device and terminal, and the method comprises the steps: constructing a receiving power data set for an indoor environment, and carrying out the preprocessing of the receiving power data set; and training the perceptron network by using the pre-processed received power data set, finding a corresponding connection weight when the cost function is small through an optimization algorithm, and performing prediction simulation comparison verification by taking the obtained connection weight as a connection parameter value of the perceptron network. According to the invention, a high-precision indoor electric wave prediction model is established by using the perceptron network, and the prediction precision is high; and outputting a prediction power result data set according to comparison simulation ...

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21-04-2004 дата публикации

带有玻璃内画的鱼缸及其制作方法

Номер: CN0001490178A
Автор: GUO LIXIN, LIXIN GUO, 郭立新
Принадлежит:

A fish jar features that its main body, outer casing and top cover are made up of glass and its inner surface has the painting. Its advantages are beautiful appearance and easy cleaning.

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