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Kilometer-resolution three-dimensional crustal deformation of Tibetan Plateau from InSAR and GNSS

Science China Earth Sciences 2024年第6期67卷 1818-1835页

作者： Chuanjin LIU Lingyun JI Liangyu ZHU Caijun XU chaoying zhao Zhong LU Qingliang WANG School of Geodesy and Geomatics Wuhan UniversityWuhan 430079China The Second Monitoring and Application Center China Earthquake AdministrationXi’an 710054China College of Geological Engineering and Geomatics Chang’an UniversityXi’an 710054China Roy M.Huffington Department of Earth Sciences Southern Methodist UniversityDallasTX 75025USA

Located at the forefront of the collision between the Indian and Eurasian Plates,the Tibetan Plateau experiences intense crustal *** ground-based geodetic monitoring,such as GNSS and leveling,is challenging,due to factors such as high altitude and harsh climate,making it difficult to accurately determine a high-resolution crustal deformation field of the *** by ground observation conditions,InSAR technique has key advantages for obtaining extensive and high-resolution crustal deformation *** makes it indispensable for crustal deformation monitoring on the Tibetan *** study used Sentinel-1 data from 2014 to 2020 to compute the ascending and descending InSAR deformation fields for the Tibetan *** was conducted with a measurement accuracy of approximately 3 mm/*** upon this,we integrated InSAR and GNSS data to yield kilometer-resolution three-dimensional(3D)crustal deformation and strain rate fields for the Tibetan Plateau.A spherical wavelet analysis was used to decompose the 3D deformation field and separate the nontectonic crustal deformation to increase the strength of the tectonic deformation ***-wavelength(110 km)deformation mainly results from subsidence in the central plateau and uplifts along the Himalayan *** indicates that the Tibetan Plateau may have stopped the entire uplift and entered a local collapse ***,the deformation fields at different spatial scales reveal that the plateau exhibits discontinuous deformation in short wavelengths and continuous deformation in long *** findings of this study contribute to resolving the controversy between the Block and Continuum Deformation models of the Tibetan Plateau.

关键词： Tibetan Plateau InSAR GNSS 3D Deformation Deformation Model

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UAVSAR在地表形变监测中的应用综述

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测绘科学 2024年第1期49卷 50-66页

作者：吴玉婕赵超英长安大学地质工程与测绘学院西安710054 西部矿产资源与地质工程教育部重点实验室西安710054

针对无人飞行器合成孔径雷达(UAVSAR)差分干涉测量可用于形变监测的发展潜力,介绍了美国UAVSAR的系统设计、工作原理、数据产品等,概述了国内外UAVSAR系统的发展与应用现状、存在问题和发展趋势,重点讨论了UAVSAR在火山、断裂、冰川、... 详细信息

针对无人飞行器合成孔径雷达(UAVSAR)差分干涉测量可用于形变监测的发展潜力,介绍了美国UAVSAR的系统设计、工作原理、数据产品等,概述了国内外UAVSAR系统的发展与应用现状、存在问题和发展趋势,重点讨论了UAVSAR在火山、断裂、冰川、冻土、滑坡、地面沉降等典型地表形变监测的应用。其高空间分辨率和较强的穿透性是对星载SAR数据极好的补充,彰显了UAVSAR系统极大的应用前景,为国内机载雷达系统的研究及其在地质灾害监测方面提供参考。

关键词：无人飞行器合成孔径雷达 AirMOSS GLISTIN-A 地质灾害形变监测

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InSAR技术用于甘孜-玉树与鲜水河断裂带三维运动研究

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大地测量与地球动力学 2024年第10期44卷 1022-1027页

作者：陈立权赵超英高源长安大学地质工程与测绘学院西安710054 西部矿产资源与地质工程教育部重点实验室西安710054

以我国四川西部甘孜-玉树与鲜水河断裂带为研究对象,基于欧洲COMET机构提供的LiCSAR产品,包括合成孔径雷达干涉测量技术(InSAR)解缠图和相干图等,采用LiCSBAS软件得到断裂带升降轨视线向形变速率结果,并联合GNSS形变监测结果进行基准改... 详细信息

以我国四川西部甘孜-玉树与鲜水河断裂带为研究对象,基于欧洲COMET机构提供的LiCSAR产品,包括合成孔径雷达干涉测量技术(InSAR)解缠图和相干图等,采用LiCSBAS软件得到断裂带升降轨视线向形变速率结果,并联合GNSS形变监测结果进行基准改正,分解得到断裂带三维形变场。结果表明,甘孜-玉树与鲜水河断裂带具有左旋走滑特征,最大水平形变速率超过20 mm/a;InSAR结果与GNSS所得水平形变速率均方根误差为1.4 mm/a,水平方向均方根误差为4.8°。基于水平形变场计算得到的剪应变率集中分布在沿鲜水河断裂带附近,最大值超过150×10^(-9)/a。本文研究可为区域孕震机制、地震风险性评估和构造滑坡分布规律研究提供重要参考。

关键词：甘孜-玉树断裂鲜水河断裂 InSAR 三维形变最大剪应变率构造运动

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基于卷积神经网络的多工况多传感滚动轴承实时监控方法

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传感技术学报 2024年第7期37卷 1162-1171页

作者：陈昌川朱嘉琪魏琦尹淑娟乔飞赵超莹重庆邮电大学通信与信息工程学院重庆400065 内蒙古科技大学包头师范学院内蒙古包头014030 清华大学电子工程系北京100084

针对工业环境中广泛在多工况下多滚动轴承实时状态监测的需求和部署环境受限的挑战,提出一种基于卷积神经网络(Convolutional Neural Network,CNN)的面向多传感器滚动轴承运行状态监控方法。该方法将两个不同工况下的一维时间序列数据... 详细信息

针对工业环境中广泛在多工况下多滚动轴承实时状态监测的需求和部署环境受限的挑战,提出一种基于卷积神经网络(Convolutional Neural Network,CNN)的面向多传感器滚动轴承运行状态监控方法。该方法将两个不同工况下的一维时间序列数据集以均方根(Root Mean Square,RMS)指标标注,并通过将一维时间序列多传感器数据重构为二维空间张量的形式输入卷积神经网络训练。最后利用层融合和16比特量化优化,将网络部署到FPGA上,用以解决CNN的计算开销。实验结果表明,在结合了两种不同工况的数据集下,网络测试推理准确度依然高达99.24%,比多层感知机实现高10.48%,比多层感知机结合支持向量机的实现高2.91%,该算法对于新加入的数据集也有较强的鲁棒性,经过重训练,新加入的数据集准确率可以达到99.17%。基于FPGA部署优化的网络的峰值能效为76.217GPOS/W,为CPU实现的33.09倍,GPU实现的5.39倍。其中,16比特精度部署的网络测试精度相较32比特精度实现仅降低0.001%。

关键词：滚动轴承多工况卷积神经网络 FPGA 部署优化

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Noise Reduction for InSAR Phase Images Using BM3D

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Chinese Journal of Electronics 2014年第2期23卷 329-333页

作者： ZHANG Wenge ZHANG Qin zhao chaoying YANG Chengsheng ZOU Weibao College of Geology Engineering and Geomatics Chang'an University Key Laboratory of Western China's Mineral Resources and Geological Engineering Ministry of Education Chang'an University

This paper extends the application of Block-matching(BM) and 3D transform-domain collaborative filtering(BM3D) to the noise reduction in Interferometric synthetic aperture radar(In SAR) phase imagery,and proposes a denoising algorithm which can effectively remove noise and preserve fringes. Since the noise level estimated by a median estimator is not always optimal for proposed algorithm in wavelet domain, a method of calculating optimal noise standard deviation is also *** proposed algorithm is efficient and robust. Experimental results show that the visual quality and evaluation indexes of proposed algorithm outperform other filters for both simulated and real In SAR images.

关键词： Image processing Interferometric synthetic aperture radar(In SAR) Phase noise reduction Block-matching(BM) Wavelet transform

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Monitoring mine collapse by D-InSAR

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Mining Science and Technology 2010年第5期20卷 696-700页

作者： YANG Chengsheng ZHANG Qin zhao chaoying JI Lingyun ZHU Wu School of Geological Engineering and Surveying Chang'an University Xi'an 710054 China Key Laboratory of Western China Mineral Resources and Geological Engineering Ministry of Education Xi'an 710054 China Second Crust Monitoring and Application Center CEA Xi 'an 710054 China

For harmful ground collapse and its special deformation characteristics,which causes SAR images to lose coherence,InSAR technology cannot be applied in monitoring surface collapse in mining *** took the Shenmu mining area in northern Shaanxi province as an example to study subsidence in mining areas and proposed an interpolated multi-view processing *** results show that this method can improve the detectable deformation gradient to a certain extent and can become a good reference value for monitoring large scale gradient *** also analyzed the rules for temporal decorrelation in mining.

关键词： D-InSAR coal mine subsidence monitoring collapse temporal decorrelation interpolated multi-view

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Multi-dimensional and long-term time series monitoring and early warning of landslide hazard with improved cross-platform SAR offset tracking method

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Science China(Technological Sciences) 2022年第8期65卷 1891-1912页

作者： YIN YuePing LIU XiaoJie zhao chaoying TOMÁS Roberto ZHANG Qin LU Zhong LI Bin China Institute of Geo-environment Monitoring Beijing 100081China School of Geological Engineering and Geomatics Chang’an UniversityXi’an 710054China Department of Civil Engineering University of AlicanteAlicante 03080Spain Key Laboratory of Western China’s Mineral Resources and Geological Engineering Ministry of EducationXi’an 710054China Roy M.Huffington Department of Earth Sciences Southern Methodist UniversityDallas TX 75275USA Institute of Geomechanics Chinese Academy of Geological SciencesBeijing 100081China

Multi-dimensional, long-term time series displacement monitoring is crucial for generating early warnings for active landslides and for mitigating geohazards. The synthetic aperture radar(SAR) interferometry method has been widely applied to achieve small-gradient landslide displacement monitoring;however, measuring the landslide displacement with a steep gradient has posed certain challenges. In comparison, the SAR offset tracking method is a powerful tool for mapping large-gradient landslide displacement in both the slant-range and azimuth directions. Nevertheless, there are some limitations in the existing SAR offset tracking approaches:(i) the measurement accuracy is greatly reduced by the extreme topography relief in high mountain areas,(ii) a fixed matching window from expert experience is usually adopted in the calculation of cross-correlation,(iii) estimating the long-term displacements between the SAR images from cross-platforms and with longer spatiotemporal baselines is a challenging task, and(iv) it is difficult to calculate the three-dimensional(3D) landslide displacements using a single SAR ***, only a few studies have focused on how to realize early warning of landslide deformation using SAR *** address these issues, this paper presents an improved cross-platform SAR offset tracking method, which can not only estimate high-precision landslide displacements in two and three dimensions but also calculate long-term time series displacements over a decade using cross-platform SAR offset tracking measurements. Initially, we optimize the traditional SAR offset tracking workflow to estimate high-precision ground displacements, in which three improvements are highlighted:(i) an“ortho-rectification” operation is applied to restrain the effect of topography relief,(ii) an “adaptive matching window” is adopted in the cross-correlation computation, and(iii) a new strategy is proposed to combine all the possible offset pairs and optima

关键词： landslide multi-dimensional displacement displacement forecasting early warning SAR offset tracking

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Multi-Time Scale Operation and Simulation Strategy of the Park Based on Model Predictive Control

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Energy Engineering 2024年第3期121卷 747-767页

作者： Jun zhao chaoying Yang Ran Li Jinge Song Grid Center State Grid Shanxi Electric Power Company Electric Power Science Research InstituteTaiyuan030000China

Due to the impact of source-load prediction power errors and uncertainties,the actual operation of the park will have a wide range of fluctuations compared with the expected state,resulting in its inability to achieve the expected *** paper constructs an operating simulation model of the park power grid operation considering demand response and proposes a multi-time scale operating simulation method that combines day-ahead optimization and model predictive control(MPC).In the day-ahead stage,an operating simulation plan that comprehensively considers the user’s side comfort and operating costs is proposed with a long-term time scale of 15 *** order to cope with power fluctuations of photovoltaic,wind turbine and conventional load,MPC is used to track and roll correct the day-ahead operating simulation plan in the intra-day stage to meet the actual operating operation status of the ***,the validity and economy of the operating simulation strategy are verified through the analysis of arithmetic examples.

关键词： Demand response model predictive control multiple time scales operating simulation

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Influence of Pump Depletion of Non-degenerate Optical Parametric Amplification on the Optimum Realization of EPR Paradox

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量子光学学报 2006年第B8期12卷 75-75页

作者： chaoying zhao Weihan Tan Department of Physics Shanghai University Shanghai 200444 China

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非线性简并光学参量放大系统的量子起伏

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光学学报 2005年第8期25卷 1136-1142页

作者：赵超樱谭维翰上海大学物理系上海200444

解析求解了P表象中考虑抽运吃空后的非线性含时简并光学参量放大系统获得压缩光所满足的福克尔普朗克(Fokker-Planck)方程,并且计算了它在阈值附近及远离阈值的量子起伏。研究表明:若略去与η成正比的项,则通解很自然地过渡到线性近似... 详细信息

解析求解了P表象中考虑抽运吃空后的非线性含时简并光学参量放大系统获得压缩光所满足的福克尔普朗克(Fokker-Planck)方程,并且计算了它在阈值附近及远离阈值的量子起伏。研究表明:若略去与η成正比的项,则通解很自然地过渡到线性近似解。计及与η成正比的项后,该解与Drummond等在阈值附近的微扰展开理论相比,基本相符。但在远离阈值处,微扰展开理论不适用,而该结果在阈值附近以及远离阈值的整个区域均是适用的。当μ→0压缩很小时,起伏趋近于真空起伏;而μ1,压缩增大时,趋近1/1+μ线性理论。

关键词：量子光学非线性简并光学参量放大量子起伏福克尔-普朗克方程

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