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Hybrid inversion method for equivalent electric charge of thunder cloud based on multi-station atmospheric electric field

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Instrumentation 2015年第3期2卷 3-11页

作者： XING Hongyan ZHANG Qiang JI Xinyuan XU wei Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science & Technology Key Laboratory of Meteorological Observation and Information Processing of Jiangsu Province Nanjing University of Information Science & Technology

This article proposes the hybrid method to inverse the equivalent electric charge of thunder cloud based on the data of multi-station atmospheric electric field. Firstly,the method combines the genetic algorithm( GA) and New ton method through the mosaic hybrid structure. In addition,the thunder cloud equivalent charge is inversed based on the forw ard modeling results by giving the parameters of the thunder cloud charge structure. Then an ideal model is built to examine the performance compared to the nonlinear least squares method. Finally,a typical thunderstorms process in Nanjing is analyzed by Genetic-New ton algorithm with the help of weather radar. The results show the proposed method has the strong global searching capability so that the problem of initial value selection can be solved effectively,as well as gets the better inversion results. Furthermore,the mosaic hybrid structure can absorb the advantages of tw o algorithms better,and the inversion position is consistent with the strongest radar echo.The inversion results find the upper negative charge is small and can be ignored,w hich means the triple-polarity charge structure is relatively scientific,w hich could give some references to the research like lightning forecasting,location tracking.

关键词： inversion of thunder cloud equivalent charge atmospheric electric field genetic algorithm new ton me

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thunder

模型世界 2017年第7期 37-37页

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基于thunder的结构声辐射有源控制

基于THUNDER的结构声辐射有源控制

作者：郝俊仙东南大学

学位级别：硕士

论文中结合有限元法分析了复杂封闭空间的声模态和双层板结构的模态,建立了有源结构噪声控制模型,从理论上详细的推导了结构声辐射的声腔模态理论和结构模态理论,利用有限元法获得模态数值解来分析声固耦合关系。采用一种新型薄壁单晶... 详细信息

论文中结合有限元法分析了复杂封闭空间的声模态和双层板结构的模态,建立了有源结构噪声控制模型,从理论上详细的推导了结构声辐射的声腔模态理论和结构模态理论,利用有限元法获得模态数值解来分析声固耦合关系。采用一种新型薄壁单晶体压电致动及传感装置(thunder)作为次级力源来控制结构的振动。thunder具有卓越的输出位移特性和其固有的柔性,其主动及被动控制特性优于同类的其它压电产品,用它来进行有源结构噪声控制是一个比较理想的选择。论文中对thunder的位置进行优化并且合理选择thunder的个数。为进一步研究thunder致动器及发展有效的控制算法提供了理论基础。通过计算机仿真计算,讨论了以全局时空平均声势能为控制目标函数时声腔声场的变化情况。并分析了空腔中声压的变化与激励频率的关系。搭建了一个双层弹性板中间布置thunder驱动器的实验模型,进行了双层弹性板的振动有源自适应滤波LMS控制实验,获得了较好的试验结果;此试验的目的是要验证采用thunder驱动器以ANSC方式进行双层壁车厢内噪声模型跟踪匹配控制的可行性。项目研究以车厢内噪声控制为背景,技术使用范围可以推广到所有封闭空间有源噪声控制相关方面。

关键词：有源控制结构声辐射 thunder 封闭空间 ASNC 声模态

“thunder”与“雷”的认知扩展语义对比分析

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大众文艺 2018年第17期 167-169页

作者：苏佳倩黄凤鸰宁波大学科学技术学院

本文基于原则性多义词分析法,以英汉"雷"为研究对象,基于语料库和词典,对其的原型词义及其扩展语义进行探究。研究发现:1."thunder"与"雷"的原型词义相同,基于原型词义辐射出的扩展语义在隐喻时有其共性与特性。2.在隐喻音量、情绪、速... 详细信息

本文基于原则性多义词分析法,以英汉"雷"为研究对象,基于语料库和词典,对其的原型词义及其扩展语义进行探究。研究发现:1."thunder"与"雷"的原型词义相同,基于原型词义辐射出的扩展语义在隐喻时有其共性与特性。2.在隐喻音量、情绪、速度、神灵时,英汉"雷"有相似的拓展语义。3.英语特殊的扩展语义体现在五个方面;汉语的特殊性则体现在四个方面。

关键词：雷 thunder 认知扩展语义原型词义隐喻

Discovering the Long:Current Theories and Trends in Research on the Chinese Dragon

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Frontiers of History in China 2021年第1期16卷 123-142页

作者： Marco Meccarelli Department of History University of CatiniaCatinia 95125 Department of History University of MacerataMacerata 62100 Department of History University of UrbinoUrbino 61029Italy

After the 1980s,the world started addressing the challenges posed by economic globalization,and the protection of cultural diversity became a widely discussed topic.Today,China is experiencing problems in defining the relationship between the past and present,as well as that between tradition and modernity.Since the 1990s,China’s opening-up policy,the advent of globalization,and an increase in cross-cultural communications strengthened the country’s need to preserve its cultural heritage.Many Chinese scholars reflected on the past and examined the potential of archaeological materials,inscriptions,myths,and ancient legends to explain the relationship between tradition and modernity.The birth and evolution of the long龍,or the Chinese dragon,remains at the core of such international studies.These studies highlighted the necessity of promoting discussions on and demystifying the long.This new perspective facilitates a connection between various theories on the origin of the Chinese dragon and the contemporary identity discourse,which has attracted the attention of Chinese scholars.This paper bridges the gap by introducing reliable theories on the origin of the mythical animal and focusing on typology issues,classification,latest debates on the distinction between the long and the dragons of other cultures,and finally,main theories on the visual representation of the Chinese long.

关键词： dragon long loong thunder alligator totem theory mythical animal snake dragon motif