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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 11. Отображено 11.
23-05-2023 дата публикации

Optical storage-virtual synchronous generator stability analysis method

Номер: CN116150969A
Автор: LIU WENFEI, YANG YONG, ZHENG WEI, HAO RUHAI, HE XIN, CHEN SHIBIN, NIU HAOMING, ZHANG XUJUN, QI YING, XIE YINGZHOU, NIU ZHEN, ZHAO JINGUO, YANG RUI, JIN YONGSHENG
Принадлежит:

The invention provides an optical storage-virtual synchronous generator stability analysis method, and belongs to the technical field of virtual synchronous generator control modeling and stability. The method comprises the following steps: aiming at an optical storage-virtual synchronous generator grid-connected system, establishing a virtual synchronous generator dq domain model based on a harmonic state space theory; taking the control parameter sensitivity under multiple frequency domains as an index, and determining a key control parameter influencing a dominant mode; analyzing the stability domain of the optical storage-virtual synchronous generator system under different key control parameters and different power grid intensities; wherein a characteristic root related to a voltage inner ring and a power ring in the optical storage-virtual synchronous generator system is a dominant mode. According to the method, the stability of the virtual synchronous generator grid-connected system ...

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Номер записи: 1
12-09-2017 дата публикации

A method for inhibiting high carbon steel in the method of casting the safety helmet

Номер: CN0105710329B
Автор: 金百刚, 费鹏, 赵雷, 王鲁毅, 张宏亮, 苏小利, 李立勋, 刘文飞, 殷浩, 李黎明
Принадлежит:

... 本发明提供种抑制中高碳钢浇注絮流的方法，根据每罐钢水的实测碳含量，对应调整精炼搬出目标温度，将实测碳含量与目标碳含量作比较，实测碳含量比目标碳含量每减少0.01％，精炼搬出目标温度在原设定温度基础上提高0.8～1.5℃。中包钢水重量保持在满包浇注，钢水液位控制在距溢流槽100～200mm，目标过热度控制在17～28℃。本发明可杜绝由于中高碳钢絮流导致的断浇事故，在保证生产顺利进行的同时，使产品质量亦得到很大提高。 ...

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Номер записи: 2
22-08-2023 дата публикации

Network side energy storage optimal capacity verification method and system

Номер: CN116632883A
Автор: ZHANG BOLIN, SHAO CHONG, WEI BO, LIU WENFEI, LIU KEQUAN, YANG YONG, HAO RUHAI, XU HONGLEI, NIU HAOMING, ZHANG XUJUN, CHEN SHIBIN, QI YING, XIE YINGZHOU, NIU ZHEN, ZHAO JINGUO
Принадлежит:

The invention discloses a grid-side energy storage optimal capacity verification method and system, and relates to the field of power system grid-side planning, and the method comprises the steps: obtaining the parameters of each thermal power generating unit, the parameters of each wind power generating unit, the parameters of energy storage equipment, the parameters of power consumers, and network topology data of a power system; determining the optimal penetration capacity of the energy storage equipment according to the energy storage capacity verification model; the energy storage capacity verification model comprises constraint conditions and an objective function; wherein the target function is a function established by taking the higher rated power and the larger rated capacity of the energy storage equipment as targets; the optimal penetration capacity of the energy storage equipment is calculated according to the rated power and the rated capacity of the energy storage equipment ...

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Номер записи: 3
22-12-2004 дата публикации

一种高交换容量树脂催化剂及其制备方法

Номер: CN0001555924A
Автор: LIU WENFEI, GAO YONGFU, GAO YONGLIN, WENFEI LIU, YONGFU GAO, YONGLIN GAO, 刘文飞
Принадлежит:

A strong-acidic macroreticular cationic resine catalyst with high exchange capacity is prepared from styrene, divinylbenzene and the mixture of straight-chain C8-C20 paraffin and benzene derivatives, which is used as pore-forming agent through polymerization, and sulfonating by high-concentration sulfuric acid. Its advantages are high catalytic activity, long service life and high exchange capacity greater than 5.25 mmol/g[H].

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Номер записи: 4
12-09-2017 дата публикации

A process for producing dimethyl ether [...] DMM3 - 5 device and method

Номер: CN0105622366B
Автор: 毛进池, 刘文飞, 郭为磊, 王文学
Принадлежит:

... 本发明公开了种生产聚甲氧基二甲醚DMM3‑5的装置及方法，以两法制取的含有甲醛的气相产物作为起始原料，不经过吸收塔，即不制备成水溶液，而是自甲醇氧化反应器的出口排出，经换热、精脱水后，通入到具有气相萃取、液相催化、液相蒸馏于体的萃取催化蒸馏塔中进行缩聚反应，步完成缩聚反应和分馏等工艺过程，简化了原有冗长的流程。本发明方法创造了新的制备聚甲氧基二甲醚的技术路线；与现有工艺技术相比，省去了大量设备、管线、内件设施；优化了工艺流程；节省了投资、降低了生产成本；最大化的节能减排；为大型化、连续化、集约化生产打下了坚实基础。 ...

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Номер записи: 5
18-07-2023 дата публикации

Energy storage scheduling decision-making method and system based on optimal wind-fire storage combined operation index

Номер: CN116454891A
Автор: SHAO CHONG, LIU KEQUAN, LIU WENFEI, WEI BO, XU HONGLEI, YANG YONG, HAO RUHAI, NIU HAOMING, ZHANG XUJUN, CHEN SHIBIN, QI YING, XIE YINGZHOU, NIU ZHEN, ZHAO JINGUO
Принадлежит:

The invention discloses an energy storage scheduling decision-making method and system based on optimal wind power, fire power and energy storage combined operation indexes, and relates to the field of power market scheduling decision-making, and the method comprises the steps: obtaining parameters of each thermal power generating unit, parameters of each wind power generating unit, load parameters, parameters of an energy storage system and network topology data of a power system in each time period; according to the energy storage system scheduling decision model, determining the charge and discharge quantity of the energy storage system in the target time period; the decision model comprises constraint conditions and a target function; the constraint conditions are set according to parameters of each thermal power generating unit, parameters of each wind power generating unit, load parameters, parameters of an energy storage system and network topology data; the node power balance constraint ...

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Номер записи: 6
12-05-2023 дата публикации

Greenhouse equipment control method

Номер: CN116107206A
Автор: YANG YONG, HE XIN, ZHOU ZHIYI, WANG JIYOU, LIU WENFEI, WANG JIANGBO, NIU HAOMING, NIU HUANNA, ZHANG XUJUN
Принадлежит:

The invention provides a greenhouse equipment control method. The method comprises the following steps: determining an energy consumption benefit model of greenhouse equipment operation power and greenhouse load yield increase total income; solving initial greenhouse equipment operation power corresponding to a first objective function of the energy consumption benefit model; determining a greenhouse operation information prediction model of initial greenhouse equipment operation power and optimization adjustment amount; solving an optimization adjustment amount corresponding to a second objective function of the prediction model; determining target greenhouse equipment operation power based on the initial greenhouse equipment operation power and the optimization adjustment amount; and setting the operating power of the greenhouse equipment according to the operating power of the target greenhouse equipment. Therefore, the operation power of greenhouse equipment is planned and controlled ...

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Номер записи: 7
16-05-2023 дата публикации

Distributed electric drive semitrailer train transverse stability control method

Номер: CN116118518A
Автор: DENG ZHAOWEN, DENG SI, ZHAO YOUQUN, GAO WEI, WANG BAOHUA, WANG SISHAN, KONG XINXIN, LUO JINTAO, JIN YONGHUI, CAO YIFAN, LIU WENFEI, YANG TAO
Принадлежит:

The invention belongs to the technical field of electric semi-trailer train control, and particularly relates to a distributed electric drive semi-trailer train transverse stability control method which comprises the following steps: 1) establishing a vehicle dynamics model; 2) based on a sliding mode control (SMC) algorithm, considering the influence of a hinge angle on the transverse stability of the trailer, and designing a tractor and trailer upper-layer transverse stability controller; 3) judging the stability of the upper-layer controller; and 4) adopting an equal proportion distribution method to distribute the wheel torque for the lower layer. Compared with an existing distributed electric drive semitrailer train transverse stability control method based on PID control, the method has the advantages that the yaw velocity, the side slip angle and the hinge angle of a tractor and a trailer can be reduced, and the stability and the safety of the semitrailer train during high-speed ...

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Номер записи: 8
28-07-2023 дата публикации

Two-stage photovoltaic inverter low voltage ride through control method based on power self-adaption

Номер: CN116505519A
Автор: LIU WENFEI, QI YING, NIU HAOMING, ZHANG XUJUN, YANG YONG, CHEN SHIBIN, JIN YONGSHENG, NIU ZHEN, ZHAO JINGUO, XIE YINGZHOU, YANG RUI, HAO RUHAI, HE XIN, LAI HUI, MIAO HONG
Принадлежит:

The invention relates to a two-stage photovoltaic inverter low voltage ride through control method based on power self-adaption, and the method comprises the following steps: determining the voltage drop of a power grid, calculating an active power reference value, and feeding back the active power reference value to a boost conversion circuit; switching the maximum power point tracking module to a dynamic voltage regulation module, locking the voltage reference value of the maximum power point tracking module, and adaptively regulating the photovoltaic output power according to the voltage drop depth; and boosting and inverting the output voltage and the output current of the photovoltaic array, and providing reactive current for a power grid. According to the technical scheme, the output voltage and the output current of the photovoltaic array are adjusted in a power feed-forward mode, the photovoltaic output power is adaptively adjusted according to the voltage drop depth, and the response ...

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Номер записи: 9
23-06-2023 дата публикации

Method for realizing picosecond-level equivalent sampling in time domain reflection measurement of soil moisture content

Номер: CN116297866A
Автор: QIN WENHU, LIU WENFEI, SUN LIBO, XIE WENPENG
Принадлежит:

The invention discloses a method for realizing picosecond-level equivalent sampling in soil moisture content measurement through time domain reflection. Firstly, two independent temperature compensation crystal oscillators with the frequency error of 0.5 ppm are selected, a low-noise driving circuit is used for supplying power to the crystal oscillators, a low-pass filter is additionally arranged at the front ends of output clock signals of the crystal oscillators, and clock jitter of the crystal oscillators is reduced; secondly, a high-frequency pulse signal is generated, a 30 MHz temperature-compensation crystal oscillator serves as a DDS system clock, an FPGA is used for controlling a frequency control word of the DDS to adjust the frequency of an output signal to be 10.001 MHz, then a 50 MHz temperature-compensation crystal oscillator serves as an FPGA system clock, and a phase-locked loop in the FPGA is used for outputting 10 MHz as a low-speed ADC sampling clock signal; and finally ...

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Номер записи: 10
01-08-2023 дата публикации

Scouring simulation equipment

Номер: CN116519524A
Автор: ZHANG LICHAO, YANG SENLIN, CAO QING, CAO KAIXING, LIU ZAIRONG, CHEN MEIYU, LI ZANFENG, ZHANG WEI, ZHU QINGPING, TANG LIYOU, XIA JINWEN, MA FAN, ZHAO JIANMIN, LIU WENFEI, YANG QIANYA, CHENG HONG
Принадлежит:

The invention discloses scouring simulation equipment which comprises an impact platform, a liquid supply mechanism is arranged on the upper end face of the impact platform, the surface of the impact platform is obliquely arranged, an impact receptor is embedded in the surface of the impact platform, a guide mechanism is further embedded in the upper surface of the impact platform, and the guide mechanism comprises an annular groove, a guide block and a guide plate. The guide plate is flush with the surface of the impact platform, the annular groove is formed in the surface of the guide plate, the guide block is slidably connected to the interior of the annular groove, a driving mechanism for driving the guide block is arranged in the guide plate, and the guide block is of a conical structure. And the water flow impact position and angle can be autonomously adjusted or adaptively adjusted as required.

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Номер записи: 11