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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 14. Отображено 14.
07-01-2015 дата публикации

Industrial load classification control method based on daily load curve

Номер: CN104268683A
Автор: HUANG MINGSHAN, LIU YONGGUANG, WANG JUN, JI JIANSHE, WANG LEI, LUAN GUOJUN
Принадлежит:

The invention discloses an industrial load classification control method based on a daily load curve. According to the minimum value of per unit values of daily load curve data and the distribution rule of per unit value data, a judgment is made, and if the daily load feature is intermittent and only one work period exists, loads of the class are work loads in a certain fixed period; if multiple work periods exist, the loads of the class are work loads in multiple intermittent periods; if the daily load feature is continuous and the load fluctuation is small, the loads of the class are continuous working stable loads; if the daily load feature is continuous and the load fluctuation is large, the loads of the class are continuous working loads with the obvious peak-and-valley difference fluctuation. According to the four classes of industrial loads, different load control methods are adopted.

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Номер записи: 1
18-08-2023 дата публикации

Power distribution network single-phase earth fault line selection system and method

Номер: CN116609616A
Автор: ZHOU LIDONG, LUAN GUOJUN, MA CHUANHUI, REN JIE, ZHAO BINCAI, WU JINYU, JIN FEI, LIU CHUANLIANG, LIU ZHONGHUI, LU XIAOHUI, SONG ZHANHUI, TANG MIN, HUANG HAILI, WANG SICHENG, KANG JIAN, WANG MINGLIN
Принадлежит:

The invention discloses a power distribution network single-phase earth fault line selection system and method, and the system comprises a vacuum contactor which is used for switching or externally protecting a tripping low resistor; the zero-sequence overcurrent protection circuit is simple in structure and low in resistance, temporarily changes the zero-sequence impedance of a small-current grounding system, provides temporarily amplified zero-sequence current for a grounding fault line, and improves the zero-sequence overcurrent protection sensitivity of an outgoing line switch of a transformer substation, a segment switch, a branch switch and a boundary switch on a distribution network line; the current transformer is used for wave recording of low-resistance current and low-resistance overcurrent protection; the low-resistance controller is used for diagnosing a grounding fault, outputting a control command, realizing automatic opening and closing of the vacuum contactor, and providing ...

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Номер записи: 2
12-02-2014 дата публикации

Ascent-free automatic scrubbing device for insulator

Номер: CN103567168A
Автор: JIN FEI, ZHANG FAN, WANG YAN, LIU MING, PENG YONGLEI, JIANG SIKUN, YANG JINGJING, WANG SICHENG, WANG JUNKAI, WANG JINGHAI, LUAN GUOJUN, LIU KUN, ZONG CHUANSHUAI, SHAO JIANJUN, WANG XIN, GAO YUWANG
Принадлежит:

The invention discloses an ascent-free automatic scrubbing device for an insulator. The ascent-free automatic scrubbing device for the insulator comprises a support arranged at the upper end of a supporting rod, locking mechanisms capable of being in locking fit with the two end portions of the insulator are arranged at the two ends of the support, a semi-ring rail capable of going up and down is arranged on the support through a lifting mechanism, a semi-ring sliding block capable of rotating around the axial line of the semi-ring rail is arranged on the semi-ring rail in a sliding mode, brushes corresponding to the outer wall of the insulator are arranged on the inner ring wall of the semi-ring sliding block, a scrubbing motor is arranged on the lifting mechanism, a driving gear is arranged on the output shaft of the scrubbing motor, gear teeth meshed with the gear are evenly distributed on the outer ring wall of the semi-ring sliding block, lugs are fixedly arranged at the two ends of ...

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Номер записи: 3
23-09-2009 дата публикации

Environment-friendly flame-resistant ABS resin

Номер: CN0101538396A
Автор: GUO ZHENGHONG, LUAN GUOJUN, FANG ZHENGPING, FU HEGEN, MA HAIYUN, ZHENGHONG GUO, GUOJUN LUAN, ZHENGPING FANG, HEGEN FU, HAIYUN MA
Принадлежит:

The invention discloses an environment-friendly flame-resistant ABS resin, which comprises the following components by weight percentage: 72 percent to 84 percent of ABS resin granules, 15 percent to 22 percent of PDSPB expanding type flame retardant, 0.7 percent to 4.5 percent of montmorillonite, 0.1 percent to 0.5 percent of anti-oxidant agent, 0.1 percent to 0.5 percent of anti-dripping agent and 0.1 percent to 0.5 percent of lubricant. The flame-resistant ABS resin does not contain harmful substances of lead, mercury, cadmium, hexavalent chrome, polybrominated biphenyls, polybrominated diphenyl ethers and the like, and meets the requirements of RoHS instruction about innocuity and environmental protection. The montmorillonite/PDSPB synergistic flame-resistant ABS resin not only can guarantee the flame-resistant performance, but also can keep good mechanical performance, can completely or partially replace the flame-resistant ABS resin of the traditional halogenated flame retardant and ...

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Номер записи: 4
06-06-2023 дата публикации

Dry-type transformer acoustic fault diagnosis method and system

Номер: CN116222751A
Автор: LIN QIAN, YANG JINGJING, WANG FEIFEI, HUANG XUEZENG, ZHANG YANG, SUN HUAZHONG, SUN YANDONG, KIM A-RYONG, LUAN GUOJUN, XU ZITAO
Принадлежит:

The method comprises the following steps: continuously collecting acoustic signals generated in different operation states of the dry-type transformer for multiple times, and extracting characteristic acoustic signals from the acoustic signals; extracting a key frame feature acoustic signal from each frame feature acoustic signal as a fault feature signal; extracting an MFCC feature coefficient from the fault feature signal by adopting a Mel-frequency cepstrum coefficient method; according to the MFCC feature coefficient, based on a Gaussian mixture model, an expectation maximization algorithm is adopted, acoustic features under different faults are classified and recognized, and a fault acoustic feature database is formed; acoustic signals acquired in real time are compared with fault acoustic features extracted from the fault acoustic feature database item by item, a weighted processing method is adopted to obtain the certainty degree, and the running state of the dry-type transformer ...

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Номер записи: 5
25-04-2012 дата публикации

Nano clay compounded flame-retardant ABS resin

Номер: CN0102010563B
Автор: CHEN YAJUN, GUO ZHENGHONG, FANG ZHENGPING, ZHANG YIXIANG, LUAN GUOJUN, YAJUN CHEN, ZHENGHONG GUO, ZHENGPING FANG, YIXIANG ZHANG, GUOJUN LUAN
Принадлежит:

The invention discloses nano clay compounded flame-retardant ABS resin, which is prepared by blending the following components in part by weight: 40 to 60 parts of acrylonitrile butadiene-styrene (ABS), 20 to 30 parts of compound flame retardant, 1 to 5 parts of nano clay, 3 to 10 parts of compatilizer, 10 to 30 parts of toughening agent and 0.1 to 2 parts of antioxidant. A preparation method comprises the following steps of: weighing the raw materials according to a ratio in the formula, premixing the ABS and the nano clay in a medium speed mixer for 2 to 5 minutes, adding other raw materials, and mixing for 5 to 10 minutes; and putting the mixed raw materials into a double screw extrusion machine, performing melt extrusion and granulation to obtain the nano clay compounded flame-retardant ABS resin. The resin can reach UL94-V0 class, has stable machinability and mechanical properties, ensures that the micromolecular flame retardant does not seep in the using process, is environment-friendly ...

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Номер записи: 6
05-03-2014 дата публикации

Halogen-free flame-retardant ABS (acrylonitrile butadiene styrene) resin and preparation method thereof

Номер: CN103613900A
Автор: LUAN GUOJUN, CAI XINYAN, FU HEGEN, ZHONG WEIPING, YE LIJUN
Принадлежит:

The invention discloses a halogen-free flame-retardant ABS (acrylonitrile butadiene styrene) resin and a preparation method thereof. The resin is composed of the following components in parts by weight: 50-70 parts of an ABS resin, 15-25 parts of a composite halogen-free flame retardant, 5-10 parts of nano clay treated by a low-molecular-weight lubricant, 5-15 parts of a flexibilizer, 0.5-2 parts of a stabilizer, 0.5-3 parts of a lubricant, 0.2-1 part of an antioxidant, and 0.1-1 part of a coupling agent. Compared with traditional flame retardant ABS resins, the halogen-free flame retardant ABS resin prepared according to the invention is subjected to filling modification by using the nano clay treated by a low-molecular-weight lubricant, so that the diffusion situation of the nano clay in a matrix resin is increased; through a synergistic effect between the nano clay and the composite halogen-free flame retardant, a purpose of improving the decomposition temperature of the flame retardant ...

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Номер записи: 7
12-03-2014 дата публикации

Automatic insulator scrubbing device

Номер: CN103624019A
Автор: JIN FEI, WANG JUNKAI, WANG SICHENG, YANG JINGJING, LUAN GUOJUN, WANG JINGHAI, PENG YONGLEI, LIU CHENGLU, ZHANG FAN, LIU KUN, WANG YAN, JIANG SIKUN, ZONG CHUANSHUAI, SHAO JIANJUN, GAO YUWANG, TIAN JIA
Принадлежит:

The invention discloses an automatic insulator scrubbing device. The automatic insulator scrubbing device comprises a left cover and a right cover, wherein the left cover and the right cover are in fixed butt joint on the periphery of an insulator through connecting mechanisms, clamping parts in clamping fit with the two end portions of the insulator are arranged at the two ends of the left cover and the two ends of the right cover, a semi-ring rail is arranged on the left cover or the right cover through a lifting mechanism, a main semi-ring and an auxiliary semi-ring are arranged on the semi-ring rail in a sliding mode and are capable of rotating around the axial line of the semi-ring rail, the main semi-ring and the auxiliary semi-ring are fixedly connected to form a circular ring through butt-joint mechanisms, hairbrushes corresponding to the outer wall of the insulator are arranged on the inner ring wall of the main semi-ring and the inner ring wall of the auxiliary semi-ring, a scrubbing ...

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Номер записи: 8
15-06-2011 дата публикации

Traveling wave failure distance measurement method for electric power circuit

Номер: CN0102096022A
Автор: GUOJUN LUAN, YONGWU ZHANG, XIAODONG HU, ZHIGANG WU, CHENGFENG ZHANG, HUAMING CAO, ZHIWEN PANG, PING CHEN, LUAN GUOJUN, ZHANG YONGWU, HU XIAODONG, WU ZHIGANG, ZHANG CHENGFENG, CAO HUAMING, PANG ZHIWEN, CHEN PING
Принадлежит:

The invention provides a traveling wave failure distance measurement method for an electric power circuit, which comprises the following steps of: (1) measuring initially, namely measuring time difference delta T that an initial traveling wave surge caused by a failure reaches both ends M and N of the circuit when the circuit fails internally, and solving the distance from a bus at the M end to a failure point F, wherein L is the length of the circuit, v is the propagation velocity of a traveling wave, the delta T is equal to the difference of TM and TN and the distance is used as a reference value; and (2) verifying and correcting, namely measuring time difference delta t between a first forward traveling wave surge of the bus at the M end and a reflection traveling wave surge of the failure point after the failure occurs, and solving the distance from the bus to the failure point F, wherein if delta D which is equal to the absolute value of (DMF-DMF*) is less than or equal to 1 kilometer ...

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Номер записи: 9
13-04-2011 дата публикации

Nano clay compounded flame-retardant ABS resin

Номер: CN0102010563A
Автор: Chen Yajun, Fang Zhengping, Guo Zhengjiang, Luan Guojun, Zhang Yixiang
Принадлежит:

The invention discloses nano clay compounded flame-retardant ABS resin, which is prepared by blending the following components in part by weight: 40 to 60 parts of acrylonitrile butadiene-styrene (ABS), 20 to 30 parts of compound flame retardant, 1 to 5 parts of nano clay, 3 to 10 parts of compatilizer, 10 to 30 parts of toughening agent and 0.1 to 2 parts of antioxidant. A preparation method comprises the following steps of: weighing the raw materials according to a ratio in the formula, premixing the ABS and the nano clay in a medium speed mixer for 2 to 5 minutes, adding other raw materials, and mixing for 5 to 10 minutes; and putting the mixed raw materials into a double screw extrusion machine, performing melt extrusion and granulation to obtain the nano clay compounded flame-retardant ABS resin. The resin can reach UL94-V0 class, has stable machinability and mechanical properties, ensures that the micromolecular flame retardant does not seep in the using process, is environment-friendly ...

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Номер записи: 10
12-08-2009 дата публикации

Toughened cold-resistant transparent modified polypropylene material and preparation

Номер: CN0101503539A
Автор: ZHANG YIXIANG, LUAN GUOJUN, ZHONG WEIPING, QIU WUPING, YIXIANG ZHANG, GUOJUN LUAN, WEIPING ZHONG, WUPING QIU
Принадлежит:

The invention provides a toughening cold-resistant transparent modified polypropylene material and a preparation method. The material is mainly made from the following components in parts by weight: 60-90 parts of homogeneous polypropylene, 10-30 parts of a toughening agent, 0.1-0.4 part of an alpha-nucleation agent, 0.1-0.4 part of a beta-nucleation agent and 0.2-0.4 part of an antioxidant. The material is added with propylene made from alpha-olefin with the same refractive index as polypropylene and a semi-crystalline polymer of the alpha-olefin as the toughening agent, thus the material can reduce effect on transparence of the polypropylene material and realize cold resistance and toughening of the polypropylene, and can be used together with an alpha-crystallographic form nucleating agent after compounding with a beta-crystallographic form nucleating agent to control proportions of polypropylene alpha-crystallographic form to polypropylene beta-crystallographic form, thus improving ...

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Номер записи: 11
03-03-2010 дата публикации

Storage battery grid-connected current control method based on compound control strategy

Номер: CN0101662156A
Автор: HU XIAODONG, WU ZHIGANG, LIU WENBO, LUAN GUOJUN, PANG ZHIWEN, GAO JINWEI, ZHANG TAO, LIU CHENGLU, WANG SICHENG, LIU XIHONG, XIAODONG HU, ZHIGANG WU, WENBO LIU, GUOJUN LUAN, ZHIWEN PANG, JINWEI GAO, TAO ZHANG, CHENGLU LIU, SICHENG WANG, XIHONG LIU
Принадлежит:

The invention discloses a storage battery grid-connected current control method based on a compound control strategy, which comprises the following concrete steps: firstly, adding a feed-forward voltage control variable related with a direct current input voltage and a power system voltage and modulating the control variable through an SPWM generator to generate an SPWM pulse; secondly, pre-estimating a current value of next SPWM period, adding a second-order pre-estimation link in a current feedback link according to the current value and correcting a system; and finally, controlling fast-time constants of distribution parameters in various links of the system and ensuring that the sum of the fast-time constants of the distribution parameters in various links is far less than 1/10 omega.The storage battery grid-connected current control method has the advantages that: (1) when the system start, the feed-forward voltage control amount is added to generate the duty ratio matched with the ...

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Номер записи: 12
21-07-2023 дата публикации

High-rigidity low-warpage polypropylene modified plastic and preparation method thereof

Номер: CN116462905A
Автор: LUAN GUOJUN, ZHENG JUNJUN
Принадлежит:

The invention belongs to the technical field of modified plastics, and particularly relates to a high-rigidity low-warpage polypropylene modified plastic and a preparation method thereof, the polypropylene modified plastic comprises the following raw materials by weight: 80-90 parts of polypropylene, 8-10 parts of metallocene polyethylene, 6-10 parts of magnesium salt whisker, 4-6 parts of chopped glass fiber, 0.5-1 part of a low-warpage nucleating agent, 0.1-0.3 part of an antioxidant and 0.1-0.3 part of a lubricant. The preparation method provided by the invention is scientific and reasonable in design, on one hand, the lengths of the magnesium salt whiskers and the chopped glass fibers are designed to be small, and the degree of warping is reduced; on the other hand, the metallocene polyethylene is added into the polypropylene material, and the metallocene polyethylene and the polypropylene are poor in compatibility, so that polypropylene chain segments can be effectively prevented from ...

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Номер записи: 13
19-01-2011 дата публикации

Environment-friendly flame-resistant ABS resin

Номер: CN0101538396B
Автор: LUAN GUOJUN, FU HEGEN, FANG ZHENGPING, GUO ZHENGHONG, MA HAIYUN, GUOJUN LUAN, HEGEN FU, ZHENGPING FANG, ZHENGHONG GUO, HAIYUN MA
Принадлежит:

The invention discloses an environment-friendly flame-resistant ABS resin, which comprises the following components by weight percentage: 72 percent to 84 percent of ABS resin granules, 15 percent to 22 percent of PDSPB expanding type flame retardant, 0.7 percent to 4.5 percent of montmorillonite, 0.1 percent to 0.5 percent of anti-oxidant agent, 0.1 percent to 0.5 percent of anti-dripping agent and 0.1 percent to 0.5 percent of lubricant. The flame-resistant ABS resin does not contain harmful substances of lead, mercury, cadmium, hexavalent chrome, polybrominated biphenyls, polybrominated diphenyl ethers and the like, and meets the requirements of RoHS instruction about innocuity and environmental protection. The montmorillonite/PDSPB synergistic flame-resistant ABS resin not only can guarantee the flame-resistant performance, but also can keep good mechanical performance, can completely or partially replace the flame-resistant ABS resin of the traditional halogenated flame retardantand ...

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Номер записи: 14