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

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Применить Всего найдено 8. Отображено 8.
25-07-2023 дата публикации

Gallium nitride power device and manufacturing method thereof

Номер: CN116487375A
Автор: HAN JIE, YIN FAYOU, XU JIAMIN, ZOU SONG
Принадлежит:

The invention relates to the field of gallium nitride power devices, in particular to a gallium nitride power device and a manufacturing method thereof. The device comprises a plurality of gallium nitride chips, a frame base island and a lead frame, the plurality of gallium nitride chips are attached to the frame base island through silver paste, the plurality of gallium nitride chips are parallel to one another, the source electrodes and the grid electrodes of the plurality of gallium nitride chips face the same direction, the drain electrodes of the plurality of gallium nitride chips face the same direction, and the lead frame is attached to the frame base island through silver paste. Source electrodes, drain electrodes and grid electrodes of the plurality of gallium nitride chips are electrically connected with the lead frame respectively, so that a parallel structure is formed among the plurality of gallium nitride chips. A plurality of gallium nitride chips are connected in parallel ...

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Номер записи: 1
06-06-2023 дата публикации

Parallel packaging structure of semiconductor device and manufacturing method

Номер: CN116230674A
Автор: XU JIAMIN, HAN JIE, ZOU SONG, YIN FAYOU
Принадлежит:

The invention relates to the field of gallium nitride power devices, in particular to a parallel packaging structure of a semiconductor device and a manufacturing method. According to the invention, a plurality of gallium nitride power device crystal grains are selected and subjected to a fan-out packaging process to form a crystal grain packaging structure, and the plurality of gallium nitride power device crystal grains in the crystal grain packaging structure enable the source electrodes, the drain electrodes and the grid electrodes of the gallium nitride power device crystal grains to be connected in parallel through a rewiring layer, so that double-chip parallel connection is realized; therefore, the resistance of the gallium nitride power device is reduced, and the performance of the gallium nitride power device is improved. Meanwhile, the electrical design is added on the layout of the rewiring layer, the length of a power loop is reduced, the electromagnetic interference between ...

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Номер записи: 2
27-06-2023 дата публикации

Safety design and monitoring method for natural gas and hydrogen fuel control valve

Номер: CN116341250A
Автор: WANG JIANYE, SHI JINYUAN, ZHU ZHIJIE, FAN XUEFEI, LI LIANCUI, XU JIAMIN, XU QIAN, XU WANGREN
Принадлежит:

The invention provides a method for designing and monitoring the safety of a natural gas and hydrogen fuel control valve, which comprises the following steps of: modeling, collecting data, analyzing and calculating, monitoring the safety, optimizing and improving the structure and the like in sequence, and realizing the safety design monitoring and the structure optimization and improvement of the fuel control valve in a design stage. And safe service of the natural gas and hydrogen fuel control valve of the gas turbine is ensured.

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Номер записи: 3
06-06-2023 дата публикации

Cellulose chitosan composite UiO-66-NH2 microsphere as well as preparation method and application thereof

Номер: CN116212827A
Автор: CAI FANGCHANG, CHEN SHUHAN, MA NING, ZHAN XUEQING, NI WANG, LI SHENGHUA, XU JIAMIN, ZHU CHANGCHANG
Принадлежит:

The invention discloses a cellulose chitosan composite UiO-66-NH2 microsphere as well as a preparation method and application thereof, and the preparation method of the cellulose chitosan composite UiO-66-NH2 microsphere comprises the following steps: adding chitosan and cellulose into an organic solution to form a viscous solution; adding the viscous solution into an ethanol water solution of sodium hydroxide to form transparent microspheres; washing to be neutral, and drying to obtain cellulose chitosan composite microspheres; zrCl4 and 2-aminoterephthalic acid are dissolved in DMF and stirred to be dissolved, and a reaction solution is obtained; and transferring the reaction liquid and the cellulose chitosan composite microspheres into a reaction kettle for reaction, filtering or centrifuging to obtain microspheres, and drying to obtain the cellulose chitosan composite microspheres. The dye is adsorbed by utilizing the acting force between the cellulose chitosan functional group amino ...

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Номер записи: 4
25-08-2023 дата публикации

Reliability monitoring and increasing method for in-service nuclear power unit and nuclear turbine

Номер: CN116644334A
Автор: SHI JINYUAN, FAN XUEFEI, XIE YUESHENG, JIANG LUYI, XU JIAMIN, QI LIAN, ZHAO XIAOYU, CHEN ZHONGBING, WANG SIYUAN, ZHANG LIN, XU WANGREN, WANG YUXUAN, WANG DE
Принадлежит:

The invention provides a reliability monitoring and increasing method for an in-service nuclear power unit and a nuclear turbine. The method comprises the following steps: for any in-service nuclear power equipment in an in-service nuclear power unit and a nuclear turbine, performing high-precision prediction on the reliability characteristic quantity of the in-service nuclear power equipment in the current commissioning year in the previous year or one month of each year to obtain a target reliability prediction value; acquiring a planned maintenance type of the in-service nuclear power equipment in the current commissioning year; and carrying out reliability monitoring on the in-service nuclear power equipment based on the target reliability predicted value and the planned maintenance category. According to the reliability monitoring result of the in-service nuclear power equipment, optimization and improvement of the number of planned maintenance days and the number of non-planned maintenance ...

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Номер записи: 5
02-05-2023 дата публикации

Gallium nitride wafer cutting method and gallium nitride power device packaging method

Номер: CN116053209A
Автор: XU JIAMIN, YIN FAYOU, HAN JIE, ZOU SONG
Принадлежит:

The invention relates to the field of semiconductors, in particular to a cutting method of a gallium nitride wafer and a packaging method of a gallium nitride power device. The front face of the gallium nitride wafer is grooved, so that a gallium nitride layer in a cutting channel is removed, then the gallium nitride wafer is semi-cut, a protective film with higher viscosity is used on the front face of the gallium nitride wafer, and then the back face of the gallium nitride wafer is thinned. According to the method, a part of stress of the gallium nitride wafer is released in advance during grooving, the problem that crystal grains fly away in the back thinning process of the gallium nitride wafer is avoided, the problem that the thinner the gallium nitride wafer is, the higher the risk of breakage during cutting is solved, the problems of edge breakage, warping and the like in a traditional process are also avoided, and the yield of the gallium nitride wafer is improved. Conditions are ...

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Номер записи: 6
22-08-2023 дата публикации

High-precision prediction method for reliability of in-service nuclear power unit and nuclear turbine

Номер: CN116628550A
Автор: SHI JINYUAN, FAN XUEFEI, XIE YUESHENG, JIANG LUYI, XU JIAMIN, WANG SIYUAN, ZHANG LIN, XU WANGREN, WANG YUXUAN, WANG DE
Принадлежит:

The invention provides a reliability high-precision prediction method for an in-service nuclear power unit and a nuclear turbine. The method comprises the following steps: for any in-service nuclear power equipment in an in-service nuclear power unit and a nuclear turbine, determining a reliability prediction category of the in-service nuclear power equipment in the previous year or one month of each year; and based on the reliability prediction category, predicting the reliability characteristic quantity of the in-service nuclear power equipment in the current commissioning year to obtain a target reliability prediction value of the in-service nuclear power equipment. Therefore, the reliability prediction category of the in-service nuclear power equipment can be determined, the reliability characteristic quantity of the in-service nuclear power equipment is predicted, the target reliability prediction value is obtained, the reliability prediction precision of the in-service nuclear power ...

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Номер записи: 7
22-08-2023 дата публикации

Reliability high-precision prediction, monitoring and growth method for in-service nuclear power unit

Номер: CN116628551A
Автор: SHI JINYUAN, FAN XUEFEI, XIE YUESHENG, JIANG LUYI, XU JIAMIN, WANG SIYUAN, ZHANG LIN, XU WANGREN, WANG YUXUAN, WANG DE
Принадлежит:

The invention provides a reliability high-precision prediction, monitoring and growth method for an in-service nuclear power unit. The method comprises the steps of obtaining the number of years of commissioning of an in-service nuclear power unit in a previous year or a month of each year, and determining a target reliability prediction category of the in-service nuclear power unit based on the number of years of commissioning; if the type is the first reliability prediction type, performing reliability high-precision prediction on the in-service nuclear power unit based on the first reliability basic data; if the type is a second reliability prediction type, performing reliability high-precision prediction on the in-service nuclear power unit based on second reliability basic data; and performing reliability monitoring on the in-service nuclear power unit based on the reliability predicted value and the planned maintenance type of the in-service nuclear power unit, and according to the ...

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Номер записи: 8