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A Fault Feature Extraction Model in Synchronous Generator under Stator Inter-Turn Short Circuit Based on ACMD and DEO3S

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Structural Durability & health Monitoring 2023年第2期17卷 115-130页

作者： yuling he Shuai Li Chao Zhang Xiaolong Wang Department of Mechanical Engineering and also the Hebei Key Laboratory of Electric Machinery Health Maintenance and Failure PreventionNorth China Electric Power UniversityBaoding071003China

This paper proposed a new diagnosis model for the stator inter-turn short circuit fault in synchronous *** from the past methods focused on the current or voltage signals to diagnose the electrical fault,the sta-tor vibration signal analysis based on ACMD(adaptive chirp mode decomposition)and DEO3S(demodulation energy operator of symmetrical differencing)was adopted to extract the fault ***,FT(Fourier trans-form)is applied to the vibration signal to obtain the instantaneous frequency,and PE(permutation entropy)is calculated to select the proper weighting coefﬁ***,the signal is decomposed by ACMD,with the instan-taneous frequency and weighting coefﬁcient acquired in the former step to obtain the optimal ***,DEO3S is operated to get the envelope spectrum which is able to strengthen the characteristic frequencies of the stator inter-turn short circuit *** study on the simulating signal and the real experiment data indicates the effectiveness of the proposed method for the stator inter-turn short circuit fault in synchronous *** addition,the comparison with other methods shows the superiority of the proposed model.

关键词： Synchronous generator stator inter-turn short circuit vibration signal processing adaptive chirp mode decomposition demodulation energy operator of symmetrical differencing

Observation of regular pulse train in a narrow-band optoelectronic oscillator

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Optoelectronics Letters 2024年第2期20卷 94-99页

作者： ZHAO Chunbo TUO Zhuoyue YAO Jiali he yuling ZHAI Shenghua MENG Yansong China Academy of Space Technology(Xi’an) Xi’an 710000China National Key Laboratory of Science and Technology on Space Microwave Xi’an 710000China1

We have experimentally observed a new operating state of a regular pulse train in a narrow-band optoelectronic oscillator(OEO) system, where the direct-current(DC) bias of the Mach-Zehnder modulator is set at the maximum value of the transmission transfer function instead of the usual quadrature point. The observed quasi-steady-state pulse train is distinctly periodic, with a period of 10.5 μs and a center frequency of 10 GHz, and resembles a mode-locked OEO in its waveform. The formation of regular pulses here may arise from the dynamic balance of nonlinearity and narrow-band filter effects, with the transient characteristics of the pulses arising mainly from instabilities between the gain and cavity loss. Our results are of great importance for deepening the understanding of the nonlinear dynamical processes in OEO systems.

关键词： optoelectronic pulse modulator

Yin Ruins Unveiling Origins of Chinese Civilization

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China News Release 2023年第11期 10-15页

作者： he yuling the Institute of Archaeology Chinese Academy of Social Sciences(CASS) the Anyang station under CASS

On July 13,2006,Yinxu,or the Yin Ruins,in Anyang City,central China’s henan Province,achieved inclusion on the World Cultural heritage List during the 30th United Nations Educational,Scientific and Cultural Organization(UNESCO)World heritage Conference,marking the 33rd world cultural heritage site in *** October 30,2017,oracle bone inscriptions,the earliest documentary evidence found in China,were listed in the UNESCO Memory of the World Register.

关键词： UNESCO listed oracle

Application of SABO-VMD-KELM in Fault Diagnosis of Wind Turbines

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Mechanical Engineering Science 2023年第2期5卷 23-29页

作者： yuling he Hao CUI Department of Mechanical Engineering North China Electric Power UniversityBaodingHebei071003China

In order to improve the accuracy of wind turbine fault diagnosis,a wind turbine fault diagnosis method based on Subtraction-Average-Based Optimizer(SABO)optimized Variational Mode Decomposition(VMD)and Kernel Extreme Learning Machine(KELM)is ***,the SABO algorithm was used to optimize the VMD parameters and decompose the original signal to obtain the best modal components,and then the nine features were calculated to obtain the feature ***,the SABO algorithm was used to optimize the KELM parameters,and the training set and the test set were divided according to different *** results were compared with the optimized model without SABO *** experimental results show that the fault diagnosis method of wind turbine based on SABO-VMD-KELM model can achieve fault diagnosis quickly and effectively,and has higher accuracy.

关键词： Wind turbine generator Fault diagnosis Subtraction-Average-Based Optimizer(SABO) Variational Mode Decomposition(VMD) Kernel Extreme Learning Machine(KELM)

试论安阳殷墟孝民屯遗址半地穴式建筑群的性质及相关问题

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华夏考古 2009年第2期 98-108,I0016页

作者：何毓灵中国社会科学院考古研究所北京市100710

本文通过对安阳殷墟孝民屯遗址半地穴式建筑群整体特征的分析,对比殷墟遗址的房基建筑,指出,这种房屋建筑形式在殷墟遗址已不是当时的主要建筑形式。半地穴式房基生活遗迹与遗物表现出与殷墟文化的不同,说明其房屋的主人与殷人有所不同... 详细信息

本文通过对安阳殷墟孝民屯遗址半地穴式建筑群整体特征的分析,对比殷墟遗址的房基建筑,指出,这种房屋建筑形式在殷墟遗址已不是当时的主要建筑形式。半地穴式房基生活遗迹与遗物表现出与殷墟文化的不同,说明其房屋的主人与殷人有所不同。虽然这种建筑方式可能是殷商自身的传统,但在殷墟遗址内,大量聚集出现这种形式建筑群,结合分析出土陶器特征,认为其主人最大可能是来自于西北方或西方的不同族群。

关键词：殷墟半地穴式建筑族群交流

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论殷墟手工业布局及其源流

考古 2019年第6期 75-88页

作者：何毓灵中国社会科学院考古研究所

目前的考古学研究中,“手工业生产的研究、手工业经济的研究明显不足,尤其是把古代手工业作为一个整体或就各个门类的手工业进行的系统性研究,将古代手工业作为一个产业系统并与社会政治、社会经济和社会文化联系起来的研究更是严重不足... 详细信息

目前的考古学研究中,“手工业生产的研究、手工业经济的研究明显不足,尤其是把古代手工业作为一个整体或就各个门类的手工业进行的系统性研究,将古代手工业作为一个产业系统并与社会政治、社会经济和社会文化联系起来的研究更是严重不足,即使相对于文献史学界和科技史学界关于古代手工业的研究及其成果而言也明显滞后”[1]。殷墟手工业研究正是如此。

关键词：殷墟手工业布局源流成因

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殷墟王陵四论

考古与文物 2024年第2期 104-112页

作者：何毓灵中国社会科学院考古研究所

本文在前辈学者研究的基础上,进一步指出殷墟王陵始建于洹北商城时期,是洹北商城始建之时都邑格局的重要组成部分。新的考古发现仍说明殷墟王陵废弃于西周早期,这与周革殷命的政治策略有关。王陵东区大量祭祀坑的年代为殷墟早期,特别是... 详细信息

本文在前辈学者研究的基础上,进一步指出殷墟王陵始建于洹北商城时期,是洹北商城始建之时都邑格局的重要组成部分。新的考古发现仍说明殷墟王陵废弃于西周早期,这与周革殷命的政治策略有关。王陵东区大量祭祀坑的年代为殷墟早期,特别是武丁时期,大规模祭祀是“武丁中兴”重要的政治举措。以妇好为代表的诸多王族成员死后仍葬于宫殿宗庙区,反映出当时的族邑理念。

关键词：王陵始建年代废弃年代祭祀坑年代王后陵墓