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电子式互感器辐射发射超标诊断及整改方法

高压电器 2024年第6期60卷 212-220页

作者：姜楠沈玥刘创韩尚霖冯建强苗佳琪黄金梁西安高压电器研究院股份有限公司西安710077

电子式互感器是一种配电装置,由连接到传输系统和二次转换器的一个或多个电压或电流传感器组成,向仪器、继电保护或者控制装置传输正比于被测物理量的数值。一组电子式互感器共用一台合并通信单元。合并通信单元将来自变送段的电流或电... 详细信息

电子式互感器是一种配电装置,由连接到传输系统和二次转换器的一个或多个电压或电流传感器组成,向仪器、继电保护或者控制装置传输正比于被测物理量的数值。一组电子式互感器共用一台合并通信单元。合并通信单元将来自变送段的电流或电压采样数据与采样时间进行相关的组合,并按约定的通信协议以数据帧的形式连续发送至以太网。依据GB/T 20840.8—2007标准规定的辐射发射试验来考核某型号电子式互感器时,发现其合并通信单元存在电磁辐射干扰超标现象。通过分析超标频点的干扰形成原因,采用了时钟扩频技术对产品电路进行改进,解决了问题,并得出了采用时钟扩频技术来抑制高频辐射骚扰的解决方案。

关键词：电子式互感器合并通信单元辐射发射时钟电路时钟扩频

ROLE OF CEREBRAL ASSOCIATION AREA IN THE INHIBITION OF ELECTRO-ACUPUNCTURE ON RESPONE OF SOMATOSENSORY CORTEX TO SLOW PAIN

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针刺研究 1989年第Z1期 11-12页

作者： feng jianqiang Chen Peixi Department of Physiology, Sun Yat-Sen University of Medical Sciences, Guangzhou

Experiments were performed on cats under the treatments of chloraloseand flexedil. The cortical evoked potentials (C-CEP) recorded in primarysomatosensory cortex(SI), which were elicited by C-fiber inputs of sapheneousnerve, were used as an index of slow pain. The effect of electro-acupuncture(EA) of "Zusanli" point on C-CEP and role of cerebral anterior laterialassociation area(ALA) in this effect were observed.

关键词： CEP ALA ROLE OF CEREBRAL ASSOCIATION AREA IN THE INHIBITION OF ELECTRO-ACUPUNCTURE ON RESPONE OF SOMATOSENSORY CORTEX TO SLOW PAIN

Experimental Investigation of Lower Hybrid Wave Coupling in HT-7

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Plasma Science and Technology 2013年第10期15卷 989-995页

作者： KONG Erhua DING Bojiang ZHANG Ting QIN Yongliang SHAN Jiafang LIU Fukun LI Miaohui ZHANG Lei WANG Mao LIU Liang XU Handong JIA Hua WU Zege feng jianqiang ZHAO Lianmin YANG Yong Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China School of Physics Hefei University of Technology Hefei 230009 China High Magnetic Field Laboratory Chinese Academy of Sciences Hefei 230031 China

Experiments on lower hybrid wave （LHW） coupling were investigated in the HT- 7 tokamak. Good coupling of LHW plasma has been demonstrated at different conditions in the HT-7 tokamak. Relevant results have proved that LHW-plasma coupling is affected by the phase difference between adjacent waveguides. Furthermore, the edge density around the grill and relevant coupling can be adjusted by changing the plasma line average density or the gap value between the LH grill and the last closed flux surfaces （LCFS）. It is found that the coupling of LHWs becomes poor when the edge density around the LH grill is large enough in the HT-7 tokamak, and that coupling remains good with a proper edge density. With increasing LHW power, it is also found that the reflection coefficients （RCs） increase due to non-linear effects under conditions of low edge recycling, but can decrease under high edge recycling. The edge density depends mainly on the competition between the ponderomotive force （PMF） and the edge recycling intensity in the HT-7 tokamak.

关键词： LH wave coupling plasma edge density phase difference ponderomotiveforce

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基尼系数与满意曲线

统计研究 2000年第11期17卷 49-53页

作者：封建强中国人民大学统计学系

In this paper, the author introduced the satisfaction curve and indicators of deviation degree, thereby overcame the drawback that Gini Coefficient can not reflect the income distribution pattern. After that, he used the grouped household income distribution data between 1982 and 1998 from statistics yearbooks and made an estimation and analysis to these indicators.

关键词：基层系数满意曲线满意偏差度收入分配结构

A NOVEL APPROACH FOR DOA ESTIMATION IN UNKNOWN CORRELATED NOISE FIELDS

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Journal of Electronics(China) 2006年第1期23卷 44-47页

作者： Zhou Yi feng Dazheng Liu jianqiang National Key Laboratory for Radar Signal Processing Xidian Univesity Xi ＇an 710071 China

The key of the subspace-based Direction Of Arrival (DOA) estimation lies in the estimation of signal subspace with high quality. In the case of uncorrelated signals while the signals are temporally correlated, a novel approach for the estimation of DOA in unknown correlated noise fields is proposed in this paper. The approach is based on the biorthogonality between a matrix and its Moore-Penrose pseudo inverse, and made no assumption on the spatial covariance matrix of the noise. The approach exploits the structural information of a set of spatio-temporal correlation matrices, and it can give a robust and precise estimation of signal subspace, so a precise estimation of DOA is obtained. Its performances are confirmed by computer simulation results.

关键词： Array signal processing Correlated noise Signal subspace Direction Of Arrival (DOA) estimation Spatio-temporal correlation matrices

Large-scale interplant exchange of macromolecules between soybean and dodder under nutrient stresses

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Plant Diversity 2024年第1期46卷 116-125页

作者： Jingxiong Zhang Shalan Li Wenxing Li Zerui feng Shuhan Zhang Xijie Zheng Yuxing Xu Guojing Shen Man Zhao Guoyan Cao Xuna Wu jianqiang Wu Department of Economic Plants and Biotechnology Yunnan Key Laboratory for Wild Plant ResourcesKunming Institute of BotanyChinese Academy of SciencesKunming 650201China CAS Center for Excellence in Biotic Interactions University of Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Conservation and Utilization of Bio-Resources in Yunnan and Center for Life Science School of Life SciencesYunnan UniversityKunming 650500China

Parasitic plants and their hosts communicate through haustorial *** deficiency is a common stress for plants,yet little is known about whether and how host plants and parasites communicate during adaptation to such nutrient *** this study,we used transcriptomics and proteomics to analyze how soybean(Glycine max)and its parasitizing dodder(Cuscuta australis)respond to nitrate and phosphate deficiency(-N and-P).After-N and-P treatment,the soybean and dodder plants exhibited substantial changes of transcriptome and proteome,although soybean plants showed very few transcriptional responses to-P and dodder did not show any transcriptional changes to either-N ***,large-scale interplant transport of mRNAs and proteins was *** the mobile mRNAs only comprised at most 0.2%of the transcriptomes,the foreign mobile proteins could reach 6.8%of the total proteins,suggesting that proteins may be the major forms of interplant ***,the interplant mobility of macromolecules was specifically affected by the nutrient regimes and the transport of these macromolecules was very likely independently *** study provides new insight into the communication between host plants and parasites under stress conditions.

关键词： Cuscuta Mobile molecules Nutrient deficiency Host plant-parasitic plant interaction Interplant transport Systemic signaling

A novel method for AFRPs burrs removal:Principle of mechanochemo-induced fiber fracture

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Chinese Journal of Aeronautics 2024年第7期37卷 522-538页

作者： Jie XU Bo LI Pingfa feng Qiang WANG feng feng Division of Advanced Manufacturing Tsinghua Shenzhen International Graduate SchoolTsinghua UniversityShenzhen 518055China Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China Changhe Aircraft Industry(Group)Co.Ltd Jingdezhen 333000China

Burrs generated during the machining of Aramid-Fiber-Reinforced Composites(AFRPs)pose a challenge for the production efficiency of aircraft and helicopter housing *** studies have generally attempted to suppress burrs by referring to delamination suppression *** contrast to stratification,burrs are remediable machining *** such,a mechanochemical method with burrs trimming technological strategy are implemented to effectively combat ***,we clarify the mechanism by which aramid fibers cannot be cut off using analytical and numerical *** addition,the mechanism of fiber fracture with Modified Polyurethane Reactive Polymer(M-PUR),and development of anti-burr devices(thermostatic adhesive sealed generator)are ***,the experimental results show that the reduction rate in burr length is 87%-91%through the mechanochemical *** method not only opens a new avenue to solve the burr problem of aramid fibers but also builds an interdisciplinary bridge between polymer science and composite machining.

关键词： Mechanochemical method Burrs Orthogonal cutting Aramid fiber-reinforced composites Milling

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工频磁场抗扰度系统的自动校准技术研究

高压电器 2018年第12期54卷 257-261,267页

作者：冯建强姜楠周海鹏西安高压电器研究院有限责任公司西安710077 西安优来测科技有限公司西安710065

针对工频磁场抗扰度系统校准规范缺失的现状,依据有关国家和国际标准,对工频磁场抗扰度系统的自动校准技术做了系统研究。提出了需要校准的4类参数,即:输出电流值、总谐波畸变率、线圈常数和磁场均匀区。对每类参数给出了校准方法及线路... 详细信息

针对工频磁场抗扰度系统校准规范缺失的现状,依据有关国家和国际标准,对工频磁场抗扰度系统的自动校准技术做了系统研究。提出了需要校准的4类参数,即:输出电流值、总谐波畸变率、线圈常数和磁场均匀区。对每类参数给出了校准方法及线路,设计了自动校准系统,并通过试验进行了验证。这些工作为规范该系统的校准及为下一步编写校准规范奠定了技术基础。

关键词：工频磁场抗扰度系统校准方法校准系统

Record-high efficiency perovskite LEDs achieved by accelerating radiative recombination

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Science China Materials 2024年第9期67卷 3039-3040页

作者： feng Gao Department of Physics Chemistry and BiologyLinköping UniversityLinköping58183Sweden

Light-emitting diodes(LEDs)have revolutionized the lighting and displays due to their superior energy *** increasing demand for more efficient and brighter thin-film LEDs in flat-panel displays and solid-state lighting applications has driven extensive research into perovskite materials,which show great promise for high brightness and efficiency.

关键词： lighting radiative high

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