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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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Мониторинг СМИ

Мониторинг СМИ и социальных сетей. Сканирование интернета, новостных сайтов, специализированных контентных площадок на базе мессенджеров. Гибкие настройки фильтров и первоначальных источников.

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Поддерживает ввод нескольких поисковых фраз (по одной на строку). При поиске обеспечивает поддержку морфологии русского и английского языка
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Применить Всего найдено 12. Отображено 12.
15-08-2023 дата публикации

Optimization method for transonic speed serial cascade multi-target blade profile design

Номер: CN116595639A
Принадлежит:

The invention provides an optimization method for transonic velocity tandem cascade multi-target blade profile design, and relates to the technical field of aero-engines, and the optimization method comprises the following steps: constructing a transonic velocity plane tandem cascade model; based on the idea of a mean camber line superposition thickness distribution method, performing parameterization processing on the front and rear row blade profiles of the transonic planar serial blade lattice; blade profile optimization variables are determined according to the transonic and subsonic blade profile mean camber lines and the transonic blade profile thickness distribution curve; determining the minimum static pressure ratio of the cascade as a limiting condition, selecting a plurality of incoming flow working conditions as a working condition point, and taking the total pressure loss coefficient of the working condition point as a transonic velocity cascade pneumatic optimization objective ...

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07-04-2023 дата публикации

Charging pile position and capacity prediction method based on FA-RNN

Номер: CN115936249A
Принадлежит:

The invention relates to a method for predicting the position and the capacity of a charging pile based on FA-RNN, a multi-factor index set is constructed by combining data of resident travel and extracting five factors which have relatively large influence on the position and the capacity of the charging pile, comprehensive analysis of the influence factors of the position and the capacity of the charging pile is realized, and meanwhile, the position and the capacity of the charging pile are predicted based on a recurrent neural network. According to the method, a target function constructed by influence factors is trained in combination with an RNN (Recurrent Neural Network) and a Firefly Algorithm (FA), and accurate prediction of the position and the capacity of the charging pile is realized. Based on real data such as resident travel time, resident travel mileage and the like, it is verified that the method has good robustness, accurate prediction of the positions and capacities of ...

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06-06-2023 дата публикации

Electric vehicle cluster hierarchical dispersion optimal charging method

Номер: CN116227675A
Принадлежит:

The invention relates to an electric vehicle cluster hierarchical disperse optimal charging method, which performs limited information interaction with each electric vehicle through a cluster agent, so that the charging power of the electric vehicles in a cluster can realize optimal tracking of an ideal curve, and the divergence problem caused by lack of global information in disperse optimization is avoided. And meanwhile, the cluster agent does not need to obtain specific constraint forms and related data information of the electric vehicles, so that the data storage and processing difficulty of the cluster agent can be reduced. According to the hierarchical decentralized optimization method provided by the invention, the convergence solution of the method is the optimal solution, the calculation speed for large-scale problems is high, and the problems in centralized optimization can be solved.

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11-07-2023 дата публикации

Supercooling system cooling performance evaluation method and optimization method

Номер: CN116415517A
Принадлежит:

The invention discloses a supercooling system cooling performance evaluation method and optimization method, the supercooling system is a liquid oxygen supercooling system, and the evaluation method comprises the influence of entropy production unit number and efficiency on the supercooling system; the entropy generation unit number is used for representing irreversible loss generated in the heat exchange process of the supercooling system; the efficiency is used for representing the ratio of income to payment in actual work of the supercooling system, the income is liquid nitrogen increase in a shell pass, and the payment is liquid oxygen reduction in a tube pass; the calculation formula of the entropy production unit number is shown in the specification; an efficiency calculation formula is shown in the specification; in the formula, the entropy production unit number, the entropy production number, the specific constant pressure heat capacity of the hot fluid, the mass flow rate of the ...

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16-05-2023 дата публикации

Transonic blade profile indirect generation method based on mean camber line and thickness distribution and related device

Номер: CN116127628A
Принадлежит:

The invention discloses a transonic blade profile indirect generation method based on mean camber line and thickness distribution and a related device. The method comprises the following steps: extracting mean camber line and thickness distribution based on an original blade profile; adding control points to perform fitting of mean camber line parameters; adding control points to fit thickness distribution parameters; according to the fitted parameters, calling a blade profile generation function to generate a mean camber line, thickness distribution and coordinates of a suction surface and a pressure surface; and generating an elliptical front edge and a circular tail edge, and enabling the elliptical front edge and the circular tail edge to be smoothly connected with the pressure surface and the suction surface to generate a complete blade profile. The change of the blade profile is controlled by superposing thickness distribution on a mean camber line, after the mean camber line and ...

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09-05-2023 дата публикации

Machining die and machining method for thin-wall part with annular groove in end face

Номер: CN116079356A
Принадлежит:

The invention relates to the technical field of light alloy manufacturing, in particular to a machining die and method for a thin-wall part with an annular groove in the end face. The machining die comprises a milling machining die used for machining the inner wall of the side face of the thin-wall part and a turning machining die used for machining the thin-wall end face provided with an annular groove. The milling die is provided with a protective plate which is circumferentially attached to the side face in a surrounding mode on the side face of the thin-wall part. The turning die is provided with an external supporting structure for pressing the exterior of the center annular end face of the thin-wall part and an internal supporting structure for supporting the interior of the center annular end face of the thin-wall part, and when the external supporting structure and the internal supporting structure are used for machining the annular groove, the thin-wall part is kept stable. The ...

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18-04-2023 дата публикации

Remote control system of air conditioning system of rail transit vehicle

Номер: CN115973211A
Принадлежит:

The invention discloses a remote control system for an air conditioning system of a rail transit vehicle. The remote control system comprises a data acquisition module for acquiring data information of an air conditioning unit; the air conditioning system controller is used for controlling the air conditioning unit; the wireless router module is used for communication between the air conditioning system controller and the remote mobile control terminal; and the remote mobile control terminal is used for processing the operation condition and the component information to generate fault processing information and wirelessly sending the fault processing information to the air conditioning system controller. The remote control system of the air conditioning system of the rail transit vehicle has the advantages that an operator can conveniently and timely find out faults possibly occurring in any air conditioning unit and deal with the faults, meanwhile, when the air conditioning system is in ...

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18-07-2023 дата публикации

Metal plate paste thickness detection device, system and method

Номер: CN116447963A
Автор: MENG FANJIE, DING WEI, YE CHAO
Принадлежит:

The invention provides a metal plate paste thickness detection device, system and method wherein the metal plate paste thickness detection system comprises: a horizontal support table; the supporting structure is fixed above the horizontal supporting table top, and a sliding rail is arranged on the supporting structure in the width direction of the metal plate; the at least one metal plate paste thickness detection device is arranged on the sliding rail of the supporting structure and can slide along a preset area in the direction of the sliding rail; and the industrial personal computer is connected with the metal plate paste thickness detection device and is used for calculating the thickness of the paste according to a result measured by the metal plate paste thickness detection device. The problems of radiation, feedback and adjustment of the time process and incapability of real-time synchronous monitoring of an existing thickness gauge are effectively solved.

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05-05-2023 дата публикации

Method for controlling tremor in machining process of cylindrical thin-walled workpiece

Номер: CN116060674A
Принадлежит:

The invention relates to the technical field of precision machine manufacturing, in particular to a method for controlling tremor in the machining process of a cylindrical thin-walled workpiece, the machining process comprises milling of side faces and turning of end faces and outer circles, and tremor comprises radial tremor, axial tremor and eccentric tremor; the tremor control method comprises the steps that a protective plate is arranged on the circumferential side face of the milling mold in a surrounding mode, the protective plate and the side face are tightly attached and fixed, and the side face is fixed to the milling mold in the radial direction through the protective plate; an external supporting structure and an internal supporting structure are arranged on the turning mold, the external supporting structure supports the outer side face of the hollow annular end face, the internal supporting structure supports the inner side face of the hollow annular end face, and control over ...

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08-08-2023 дата публикации

Image processing Gabor kernel convolutional neural network construction method

Номер: CN116562358A
Принадлежит:

The invention relates to the technical field of image classification processing, and provides an image processing Gabor kernel convolutional neural network construction method. The method comprises the steps of obtaining an optimized and improved Gabor filter and a shallow layer of a Gabor kernel convolutional neural network through an initial training sample set and a multi-population genetic algorithm based on a convex-center and concave-center Gaussian envelope function and a sinusoidal grating function; and based on the optimized and improved Gabor filter, training a Gabor kernel convolutional neural network layer outside the shallow layer of the Gabor kernel convolutional neural network through a back propagation algorithm to obtain a target Gabor kernel convolutional neural network, inputting the training sample set into the target Gabor kernel convolutional neural network, extracting depth features, and performing classification. According to the method, the time consumption and ...

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07-07-2023 дата публикации

Dopamine modified nano composite hydrogel and preparation method thereof

Номер: CN116396499A
Принадлежит:

The invention discloses dopamine modified nano-composite hydrogel and a preparation method thereof. The preparation method comprises the following steps: (1) preparing modified nano-hydroxyapatite DA-HA of dopamine in an acid environment or modified nano-hydroxyapatite TDA-HA of dopamine in an alkaline environment; and (2) adding a methacrylate sulfobetaine aqueous solution, glyceryl polyether, an ethylene glycol dimethacrylate aqueous solution and an ammonium persulfate aqueous solution into the DA-coated HA or TDA-coated HA, stirring and mixing, then adding tetramethylethylenediamine, continuously stirring and mixing to obtain a reaction mixed solution, and standing to obtain the product. According to the preparation method disclosed by the invention, the dopamine modified nano-hydroxyapatite nanoparticles are used as a nano additive to be added into the zwitter-ion hydrogel, so that the interfacial compatibility between inorganic nanoparticles and organic matters is improved, the mechanical ...

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21-04-2023 дата публикации

Bezier curve-based transonic blade profile design method and related device

Номер: CN115994423A
Принадлежит:

The invention discloses a transonic blade profile design method based on a Bezier curve and a related device. The transonic blade profile design method comprises the following steps: acquiring geometric parameters of a transonic blade profile; determining the positions of the front edge and the tail edge according to the chord length of the transphonous blade profile; according to the position of the transonic blade type front edge, a mean camber line and thickness distribution of the transonic blade type front edge are obtained; the suction surface and the pressure surface are respectively subjected to segmented control, the maximum thickness position is divided into two parts, and each section adopts a Bezier curve to control the maximum thickness m of the blade profile and the relative position of the maximum thickness; and determining a trailing edge arc according to the chord length of the blade profile and the tangency of the suction surface and the trailing edge arc. The blade front ...

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