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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 8. Отображено 8.
08-08-2023 дата публикации

High slope spillway reinforcing structure

Номер: CN116556283A
Автор: HE KUNMING, JIANG QISHENG, TU YAO, WU TAO, YU JUAN, XIA YANG, WANG YUWANG, MAO YONGLIANG, YANG HAOXIANG
Принадлежит:

The invention relates to a high side slope spillway reinforcing structure, and relates to the technical field of spillways, the high side slope spillway reinforcing structure comprises a side slope body and a spillway groove formed in the side slope body, a box culvert is arranged in the spillway groove, and a reinforcing layer used for reinforcing the side slope body is arranged in the spillway groove and located between the side slope body and the box culvert. A stone blocking plate is arranged on the side slope body, the stone blocking plate is located above the box culvert, and a supporting assembly used for supporting the stone blocking plate is arranged on the side slope body. The spillway is arranged to be the box culvert, sliding soil is prevented from blocking the spillway, the box culvert and the slope body are connected into a whole through the reinforcing layer, and the reinforcing effect is achieved. And if rocks fall, rolling soil and rocks fall on the stone blocking plate ...

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Номер записи: 1
11-08-2023 дата публикации

Hydraulic tunnel reinforcing structure

Номер: CN116575415A
Автор: TU YAO, JIANG QISHENG, HE KUNMING, WU TAO, YU JUAN, XIA YANG, WANG YUWANG, MAO YONGLIANG, YU TAO
Принадлежит:

The invention relates to a hydraulic tunnel reinforcing structure, and relates to the technical field of hydraulic structure design and manufacture, the hydraulic tunnel reinforcing structure comprises vertical piles and a cross beam, the two sides of a hydraulic tunnel are each vertically provided with one vertical pile in an inserted mode, and the cross beam is erected between the two vertical piles and located above the hydraulic tunnel; an axial channel is formed in the vertical pile in the length direction of the vertical pile in a penetrating mode, a plugging plate is detachably arranged on the outer side of an opening in the lower end of the vertical pile, a displacement core column is inserted in the position, close to the lower end of the vertical pile, in the axial channel, and a hammering core column is arranged in the axial channel and located above the displacement core column in an attached mode. A reinforcing mechanism is arranged in the vertical pile; when the hammering ...

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Номер записи: 2
07-07-2023 дата публикации

Polyimide resin-based composite material and preparation method thereof

Номер: CN116396613A
Автор: HUANG PEI, YU JUAN, WANG XIAODONG
Принадлежит:

The invention relates to a polyimide resin-based composite material and a preparation method thereof. The preparation method comprises the following specific steps: screening structural monomers including biphenyl dianhydride and diamine monomers with high thermal chemical stability based on group density, optimizing a main chain structure with melting and crystallization characteristics, and preparing a polyamide acid molecular chain structure in a polar solvent; the preparation method comprises the following steps: respectively screening an inert end-capping reagent for controlling molecular chain growth and an active end-capping reagent with a bulk crosslinking characteristic, adding the inert end-capping reagent and the active end-capping reagent into a polyamic acid solution according to a certain ratio, reacting to form a homogeneous-phase molten polyimide oligomer, and infiltrating and immersing the homogeneous-phase molten polyimide oligomer into fiber holes, fiber surfaces and ...

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Номер записи: 3
18-04-2023 дата публикации

Amino cellulose nanofiber as well as preparation method and application thereof

Номер: CN115976672A
Автор: FAN YIMIN, ZHANG SHUAI, YU JUAN, LIU LIANG, WANG ZHIGUO
Принадлежит:

The invention discloses an aminocellulose nanofiber as well as a preparation method and application thereof, and belongs to the field of nanofiber preparation. The method provided by the invention comprises the following steps: (1) preparing a carboxylated cellulose raw material; (2) under a weak acid condition, adding 1-ethyl-(3-dimethylaminopropyl) carbodiimide and N-hydroxysuccinimide into the carboxylated cellulose step by step, and performing'step-by-step activation 'modification to generate cellulose intermediate ester with reaction activity; (3) carrying out amidation reaction on the cellulose intermediate ester and epsilon-polylysine under a weak base condition to obtain an amino modified cellulose material; and (4) carrying out mechanical treatment, separation and purification on the amino modified cellulose under an acidic condition to obtain the amino cellulose nanofiber. The preparation method has the advantages of simplicity in operation, mild conditions, high product yield ...

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Номер записи: 4
04-04-2023 дата публикации

Ablation-resistant polyimide-based structure gradient composite material and preparation method thereof

Номер: CN115895003A
Автор: HUANG PEI, YU JUAN
Принадлежит:

The invention relates to an ablation-resistant polyimide-based structure gradient composite material and a preparation method thereof. The preparation method comprises the following specific steps: preparing a polyamide acid solution with certain viscosity by adopting an in-situ polymerization method; the preparation method comprises the following steps: preparing a polyamide acid solution, continuously stirring an ablation-resistant filler into a homogeneous phase to prepare a filler-reinforced polyamide acid composite solution, coating the polyamide acid solution and the composite solution with different filler contents on a flat carrier in a gradient suspension manner, and respectively placing in an oven for imidization treatment to obtain the filler-reinforced polyimide-based structure gradient composite material. The method is controllable in process and excellent in process, and industrial mass production can be realized; the product has stable mechanical and thermal properties and ...

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Номер записи: 5
04-07-2023 дата публикации

Full-automatic label cutting and packaging all-in-one machine

Номер: CN116374688A
Автор: HU JIAN, YU JUAN, CHENG BO, PU HOUQING
Принадлежит:

The invention relates to a full-automatic label cutting and packaging all-in-one machine, and relates to the field of packaging equipment, the full-automatic label cutting and packaging all-in-one machine comprises a workbench, an unwinding shaft and a plurality of guide rollers are arranged on the workbench, a servo motor for driving the guide rollers to rotate is arranged on the workbench, a cutting assembly for cutting labels is arranged on the workbench, and a support is further arranged on the workbench; a counting assembly used for calculating the number of the labels is arranged on the support, and a conveying assembly used for conveying the labels to the support is arranged on the workbench. The device has the effects that the number of the cut labels can be automatically calculated, the preset number of labels are stacked and bundled, and the packaging efficiency is high.

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Номер записи: 6
29-08-2023 дата публикации

Method for dissolving modified cellulose at normal temperature and application thereof

Номер: CN116655813A
Автор: WANG ZHIGUO, ZHOU HUIMEI, MA JINXIA, ZHANG LILI, YU JUAN
Принадлежит:

The invention discloses a method for dissolving modified cellulose at normal temperature and application thereof, and the method comprises the following steps: adding a cellulose raw material into an epoxide-containing metal salt solvent, and rapidly stirring and uniformly mixing at normal temperature to prepare a modified cellulose solution; the modified cellulose solution can be used for preparing a series of excellent-performance cellulose gels, films, fibers, 3D printing ink materials and the like. According to the method, cellulose is dissolved and modified at normal temperature through a one-pot method, the cellulose solvent serves as a solvent for dissolving cellulose and a catalyst for ring-opening modification of cellulose through epoxide at the same time, the method has the advantages of being low in energy consumption, short in consumed time, easy and convenient to operate and the like, and cellulose gel, films, fibers and 3D printing ink materials prepared after modification ...

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Номер записи: 7
13-06-2023 дата публикации

Method for identifying structural characteristics of polyimide-based composite material

Номер: CN116256405A
Автор: HUANG PEI, YU JUAN, WANG XIAODONG
Принадлежит:

The invention relates to a detection method for identifying structural characteristics of a polyimide-based conductive composite material. Based on the excellent electrical insulating property of polyimide and the enhanced conductivity of filler, the polyimide is equivalent to an electrode component with resistance-capacitance characteristics, and the characteristic change of the internal structure of the composite material is identified by acquiring the electrochemical response characteristics of the electrode under the charge-discharge action. The method is easy to operate and high in detection efficiency, and the in-situ and nondestructive detection effect is achieved.

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Номер записи: 8