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Momentum-space imaging spectroscopy for the study of nanophotonic materials

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Science Bulletin 2021年第8期66卷 824-838,M0004页

作者： Yiwen zhang Maoxiong Zhao Jiajun Wang Wenzhe Liu Bo Wang Songting Hu Guopeng Lu Ang Chen Jing Cui weiyi zhang Chia Wei Hsu Xiaohan Liu Lei Shi Haiwei Yin Jian Zi Department of Physics Key Laboratory of Micro-and Nano-Photonic Structures(Ministry of Education)and State Key Laboratory of Surface PhysicsFudan UniversityShanghai 200433China Shanghai Engineering Research Center of Optical Metrology for Nano-fabrication(SERCOM) Shanghai 200433China Ming Hsieh Department of Electrical Engineering University of Southern CaliforniaLos AngelesCA 90089USA Collaborative Innovation Center of Advanced Microstructures Fudan UniversityShanghai 200433China

The novel phenomena in nanophotonic materials, such as the angle-dependent reflection and negative refraction effect, are closely related to the photonic dispersions EepT. EepT describes the relation between energy E and momentum p of photonic eigenmodes, and essentially determines the optical properties of materials. As EepT is defined in momentum space(k-space), the experimental method to detect the energy distribution, that is the spectrum, in a momentum-resolved manner is highly required. In this review, the momentum-space imaging spectroscopy(MSIS) system is presented, which can directly study the spectral information in momentum space. Using the MSIS system, the photonic dispersion can be captured in one shot with high energy and momentum resolution. From the experimental momentumresolved spectrum data, other key features of photonic eigenmodes, such as quality factors and polarization states, can also be extracted through the post-processing algorithm based on the coupled mode theory. In addition, the interference configurations of the MSIS system enable the measurement of coherence properties and phase information of nanophotonic materials, which is important for the study of light-matter interaction and beam shaping with nanostructures. The MSIS system can give the comprehensive information of nanophotonic materials, and is greatly useful for the study of novel photonic phenomena and the development of nanophotonic technologies.

关键词： Momentum space imaging Nanophotonic material Photonic dispersion Photonic eigenmode Quality factor Polarization state

NUCLEATION AND GROWTH OF FERROUS MARTENSITES ALONG BOUNDARIES

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Acta Metallurgica Sinica(English Letters) 1991年第6期4卷 426-430页

作者： GONG Hai zhang weiyi Dalian Railway Institute,Dalian,Chinazhang Xiumu Institute of Metal Research,Academia Sinica,Shenyang,China

Martensites distributed along the austenite grain boundaries and twin boundaries have been examined in Fe-C,Fe-Ni-C and Fe-Cr-Mn-Mo-C *** martensites may nucleate preferentially and grow easily along these *** the mix... 详细信息

关键词： martensite nucleation martensite growth martensite morphology grain boundary twin boundary plate martensite

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死刑犯适用辅助生殖技术的法理辨析

中州学刊 2016年第10期 63-65页

作者：张为易北京大学法学院

作为替代自然生殖过程中某一环节的人工辅助生殖技术,是伴随着人类对生育活动认识的变化而发展起来的。生育权的法律性质从身份权发展到人格权,以及辅助生殖技术的长足进步,促进了生育与婚姻的分离,这些变化为死刑犯适用辅助生殖技术提... 详细信息

作为替代自然生殖过程中某一环节的人工辅助生殖技术,是伴随着人类对生育活动认识的变化而发展起来的。生育权的法律性质从身份权发展到人格权,以及辅助生殖技术的长足进步,促进了生育与婚姻的分离,这些变化为死刑犯适用辅助生殖技术提供了客观基础。从刑罚目的来看,死刑犯实现生育权不违背正义价值,关于死刑犯适用辅助生殖技术会产生负面社会效应的观点值得商榷。

关键词：辅助生殖技术生育权死刑犯刑罚目的

基于实例学习的神经网络及其在故障诊断中的应用

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电子学报 1999年第8期27卷 5-8,4页

作者：章维一侯丽雅南京理工大学机械学院

介绍一种可自动从实例中获取知识的、具有高模式聚类精度的新型神经网络———ＥＢＬ网（ｅｘａｍｐｌｅｂａｓｅｄｌｅａｒｎｉｎｇｎｅｔｗｏｒｋ），及其在故障诊断中的应用．研究结果表明：ＥＢＬ模式聚类系统可逐个从实例中学习... 详细信息

介绍一种可自动从实例中获取知识的、具有高模式聚类精度的新型神经网络———ＥＢＬ网（ｅｘａｍｐｌｅｂａｓｅｄｌｅａｒｎｉｎｇｎｅｔｗｏｒｋ），及其在故障诊断中的应用．研究结果表明：ＥＢＬ模式聚类系统可逐个从实例中学习知识，并可同时给出模式识别结果及集群的信息．ＥＢＬ模式聚类系统适用于实时故障诊断．

关键词：神经网络实例学习故障诊断化工过程

Natural Variation in CCD4 Promoter Underpins Species-Specific Evolution of Red Coloration in Citrus Peel

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Molecular Plant 2019年第9期12卷 1294-1307页

作者： Xiongjie Zheng Kaijie Zhu Quan Sun weiyi zhang Xia Wang Hongbo Cao Meilian Tan Zongzhou Xie Yunliu Zeng Junli Ye Lijun Chai Qiang Xu Zhiyong Pan Shunyuan Xiao Paul D.Fraser Xiuxin Deng Key Laboratory of Horticultural Plant Biology(Ministry of Education) Huazhong Agricultural University.WuhanChina School of Biological Sciences.Royal Holloway University of LondonEghamSurrey TW20 OEXUK Department of Plant Science and Landscape Architecture Institute for Bioscience and Biotechnology ResearchUniversity of MarylandRockvilleMDUSA Present address:College of Horticulture Agricultural University of Hebei.Baoding Hebei 071000China Present address:Key Laboratory of Biology and Genetic Improvement of Oil Crops Ministry of Agriculture.Oil Crops Research Institute of the Chinese Academy of Agricultural SciencesWuhan 430070China

Carotenoids and apocarotenoids act as phytohormones and volatile precursors that influence plant development and confer aesthetic and nutritional value critical to consumer *** fruits display considerable natural variation in carotenoid and apocarotenoid *** this study,using an integrated genetic approach we revealed that a 5;c/s-regulatory change at CCD4b encoding CAROTENOID CLEAVAGE DIOXYGENASE 4b is a major genetic determinant of natural variation in C3 0 apocarotenoids responsible for red coloration of citrus *** analyses demonstrated that in addition the known role in synthesizing 3-citraurin,CCD4b is also responsible for the production of another important C3 0 apocarotenoid pigment,***,analyses of the CCD4b promoter and transcripts from various citrus germplasm accessions established a tight correlation between the presence of a putative 5'c/s-regulatory enhancer within an MITE transposon and the enhanced allelic expression of CCD4b in C3 0 apocarotenoid-rich red-peeled *** analysis provided further evidence that functional diversification of CCD4b and naturally occurring variation of the CCD4b promoter resulted in the stepwise evolution of red peels in mandarins and their *** together,our findings provide new insights into the genetic and evolutionary basis of apocarotenoid diversity in plants,and would facilitate breeding efforts that aim to improve the nutritional and aesthetic value of citrus and perhaps other fruit crops.

关键词： citrus apocarotenoid natural variation carotenoid cleavage dioxygenase promoter transposon

Grid Forming Control with Inertial and Virtual Admittance Characteristics for Grid-tied Converters

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Grid Forming Control with Inertial and Virtual Admittance Ch...

晶场劈裂序参量导致稀土-硼十二化合物中磁性和比热反常的理论研究

第三十九届中国控制会议

作者： Yuwei Zhao weiyi zhang Wenqing Wang Zhigang Pan School of Automation Xi’an University of Posts and Telecommunications

With a considerable increase of renewable generation in the past decade, the concern for grid instability has also been increasing. The technology of grid forming control has been proposed for renewable power generation to support the grid, with some demonstrations in photovoltaic and wind power generation in recent years. This paper presents a grid forming control method named the Synchronous Power Controller（SPC）, which combines the virtual inertia control with a virtual *** the big difference in the control time scale between the power control loop and the current control loop, a simplified second-order transfer function model is adopted to analyze power control dynamics of the SPC-based power converter under different control parameters. Simulation and experimental tests are conducted on a 10-kW test bench, where the active and reactive power control dynamics under different parameters are observed. Test results demonstrate a good consistence with the response based on the mathematical model, as well as the effectiveness of the control method in offering auxiliary service that entails a certain amount of inertia and frequency droop, which contribute to the angle and frequency stability of a modern grid.

关键词： grid forming synchronous power controller virtual admittance virtual synchronous generator virtual inertia

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无机材料学报 2021年第8期36卷 865-870页

作者：胡靖三顾建飞章维益南京大学物理学院南京210093 南京大学固体微结构国家重点实验室南京210093

在低温条件(TC≈3~22 K)下,除了4f电子满壳层的LuB12之外,其他稀土-硼十二化合物(简称RB12,R为稀土元素Tb,Dy,Ho,Er,Tm)存在磁性和比热的反常现象,该反常现象的机制至今仍存争议。尽管磁化率曲线上的隆起与R3+离子的反铁磁序类似,但是... 详细信息

在低温条件(TC≈3~22 K)下,除了4f电子满壳层的LuB12之外,其他稀土-硼十二化合物(简称RB12,R为稀土元素Tb,Dy,Ho,Er,Tm)存在磁性和比热的反常现象,该反常现象的机制至今仍存争议。尽管磁化率曲线上的隆起与R3+离子的反铁磁序类似,但是中子衍射谱和莫斯堡尔谱的实验均没有明确给出稀土离子的磁结构。这些化合物磁化率、熵的反常行为和低温中子谱的结果都与RB12具有幅度调制的磁结构一致。本课题组采用模型和数值计算相结合的方法来探究该反常行为的物理机制。研究表明:由于稀土离子meV量级的晶场劈裂易受热涨落扰动,晶场劈裂能不再是一个量子力学参量,而是一个热力学序参量。物理图像中轨道角动量逐渐淬灭很好地解释了磁性和比热的反常现象。结合该类晶体低温下在(111)晶向的二聚化行为和非弹性散射谱的结果,对中子散射谱中的双峰结构也给予了一个可能的解释。

关键词：稀土化合物固体磁性晶场劈裂序参量

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用DCS系统实现BPC的探讨

电力建设 2001年第8期22卷 56-57,63页

作者：张为义铜陵发电厂安徽省铜陵市244012

国产引进型３００ＭＷ机组旁路阀门及控制系统价格昂贵。铜陵电厂３号机组改进旁路系统的设计，采用电动单速旁路阀门，ＢＰＣ的ＤＰＵ控制组态在ＤＣＳ的工程师站上实现，在操作员站上操作，并设置必要的控制保护。１年多来的运行情况... 详细信息

国产引进型３００ＭＷ机组旁路阀门及控制系统价格昂贵。铜陵电厂３号机组改进旁路系统的设计，采用电动单速旁路阀门，ＢＰＣ的ＤＰＵ控制组态在ＤＣＳ的工程师站上实现，在操作员站上操作，并设置必要的控制保护。１年多来的运行情况表明，它是一种较为实用可靠、投资少的设计方案。

关键词：旁路控制系统分散控制系统锅炉调节阀

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地铁车站岩质深基坑型钢挡墙结构分析

城市轨道交通研究 2020年第3期23卷 41-44页

作者：张维驿中铁第一勘察设计院集团有限公司西安710043

以重庆某地铁工程为背景,基于岩质基坑支护理论,提出了一种岩质地层深基坑支护结构——型钢挡墙结构。首先对该结构进行理论分析与计算,然后从结构的安全性、工期可行性及经济性等方面进行综合论证,最后通过现场测试验证了该结构的安全... 详细信息

以重庆某地铁工程为背景,基于岩质基坑支护理论,提出了一种岩质地层深基坑支护结构——型钢挡墙结构。首先对该结构进行理论分析与计算,然后从结构的安全性、工期可行性及经济性等方面进行综合论证,最后通过现场测试验证了该结构的安全性和合理性。型钢挡墙结构丰富了岩质地层基坑支护形式,可为后续类似工程的建设提供借鉴与参考。

关键词：地铁车站岩质深基坑型钢挡墙结构