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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 5. Отображено 5.
13-06-2023 дата публикации

Heat pump system and process for recycling ionic membrane caustic soda waste heat to heat primary brine

Номер: CN116255753A
Автор: HAN QIQI, ZHANG HUIJUN, JI PENGFEI, LIU BING, KONG CONGYING
Принадлежит:

The invention discloses a heat pump system and process for recycling ionic membrane caustic soda waste heat to heat primary saline water, the system comprises a heat pump unit, the condensation end of the heat pump unit is connected with a steam tank, the steam outlet of the steam tank is connected with a steam pipe network, and the steam outlet of the steam pipe network is connected with a saline water heater; the evaporation end of the heat pump unit is connected with a caustic soda pipeline from the electrolytic bath; the low-grade heat source of caustic soda waste heat is utilized, steam generated by the heat pump unit is used for heating primary saline water, redundant steam can be merged into a steam pipe network, when the steam is insufficient, the steam is supplemented by the steam in the pipe network, and a large amount of energy is saved. The primary brine temperature is adjusted through the steam flow, the caustic soda temperature is adjusted through the heat pump unit, and temperature ...

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Номер записи: 1
18-04-2023 дата публикации

Process for removing formaldehyde from 1, 4-butynediol solution

Номер: CN115974652A
Автор: CHEN XUEQING, SUN NAILIANG, LI BEI, YANG YANQI, YAO HONGGUO, GAO XIANGGUO, JI PENGFEI, GU LE
Принадлежит:

The invention relates to a process for removing formaldehyde from a 1, 4-butynediol solution. The process comprises the following steps: feeding a raw material liquid into a low-pressure tower through a low-pressure tower feeding pump, and enabling a tower kettle liquid to flow into a high-pressure tower through a high-pressure tower feeding pump; low-pressure tower top steam is condensed by a waste heat boiler and a low-pressure tower secondary condenser, then flows into a low-pressure tower reflux tank and flows out in two streams through a low-pressure tower reflux pump, one stream flows back to the low-pressure tower top, and the other stream is extracted out of the formaldehyde stripping tower; steam at the top of the high-pressure tower exchanges heat with a tower kettle material of the low-pressure tower through a thermal coupling reboiler of the low-pressure tower, then flows into a high-pressure tower reflux tank and flows out in two streams through a high-pressure tower reflux ...

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Номер записи: 2
21-07-2023 дата публикации

Simulation method for femtosecond laser sintering of metal nanoparticles

Номер: CN116469493A
Автор: JIANG LAN, JI PENGFEI, GUO JIANWU
Принадлежит:

The invention relates to a simulation method for femtosecond laser sintering of metal nanoparticles, and belongs to the technical field of femtosecond laser micro-nano machining of metal materials. According to the method, a metal nanoparticle model is established on the nanoscale, electron temperature distribution evolution and electron phonon coupling energy in metal nanoparticles are calculated by constructing a double-temperature equation model, and atomic movement of the metal nanoparticles and the corresponding nanoparticle sintering process are obtained through molecular dynamics simulation. According to the method, the influence of the nano-particle curved surface on laser energy deposition is fully considered, and the sintering mechanism of the metal nano-particles can be obtained through the simulation result, so that the machining process is guided, and the situation that the influence of electrons in a material on laser response cannot be considered by a single molecular dynamics ...

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Номер записи: 3
28-04-2023 дата публикации

Simulation prediction method for melting and ablation depth of femtosecond laser processing metal

Номер: CN116030915A
Автор: JIANG LAN, JI PENGFEI, LIN GEN
Принадлежит:

The invention provides a method for simulating and predicting melting and ablation depths of femtosecond laser processed metal, which comprises the following steps of: constructing a double-temperature equation model to simulate and calculate electron and lattice temperature evolution of a metal material in processing according to an energy transfer process from laser photons to metal electrons to metal lattices of the femtosecond laser processed metal material. And based on the simulation result of temperature evolution, the melting process of the metal material is simulated through the phase change fraction, and the material melting and removing phenomena in the machining process are predicted through critical temperature judgment. According to the method, the melting depth and the ablation depth of the femtosecond laser processing metal material can be prevented from being measured through repeated experiments, and laser parameter selection in the processing process can be guided through ...

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Номер записи: 4
21-07-2023 дата публикации

Method for predicting fused quartz processed by femtosecond laser

Номер: CN116469494A
Автор: JIANG LAN, JI PENGFEI, PAN PENGHUI
Принадлежит:

The invention relates to a method for predicting fused quartz processed by femtosecond laser, which mainly comprises the following steps of: establishing a model of fused quartz processed by femtosecond laser, and initializing calculation parameters; the machining threshold value, the machining depth, the machining contour and the removal volume under different laser parameters are calculated through the model; and analyzing the depth removal efficiency and the processing efficiency based on a calculation result, and giving guidance parameters. According to the method, the process of obtaining the machining parameters through repeated experiments can be avoided, and the machining parameters can be optimized by utilizing the prediction result, so that the product cycle is shortened, the machining cost is reduced, and the production efficiency and the machining quality are improved, and therefore, the method has an important guiding value for the actual machining process of femtosecond laser ...

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Номер записи: 5