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Spatio-temporal analysis and simulation on shallow rainfall-induced landslides in China using landslide susceptibility dynamics and rainfall I-D thresholds

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Science China Earth Sciences 2017年第4期60卷 720-732页

作者： li WeiYue liU Chun Marco SCAIONI SUN WeiWei CHEN Yu YAO dongjing CHEN Sheng HONG Yang ZHANG KaiHang CHENG GuoDong Institute of Urban Study Shanghai Normal University Shanghai 200234 China Cold and Arid Region Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou 730000 China College of Surveying and Geo-Informatics Tongji University Shanghai 200234 China Department of Architecture Built Environment and Construction Engineering Politecnico Milano Milano 20133 Italy College of Architectural Engineering Civil Engineering and Environment Ningbo University Ningbo 315211 China Shandong Academy of Building Research Jinan 250031 China Department of Geography Shanghai Normal University Shanghai 200234 China School of Atmospheric Sciences Sun Yat-sen University Guangzhou 510275 China Key Laboratory of Beibu Gulf Environmental Evolution and Resources Utilization Guangxi Teachers Education University Nanning 530001 China School of Civil Engineering and Environmental Sciences University of Oklahoma OK 73074 USA Department of Hydraulic Engineering Tsinghua University Beijing 100084 China Institute of Tourism Shanghai Normal University Shanghai 200234 China

An empirical simulation method to simulate the possible position of shallow rainfall-induced landslides in China has been *** study shows that such a simulation may be operated in real-time to highlight those areas that are highly prone to rainfall-induced landslides on the basis of the landslide susceptibility index and the rainfall intensity-duration(I-D) ***,the study on landslide susceptibility in China is *** entire territory has been classified into five categories,among which high-susceptibility regions(Zone 4-'High' and 5-'Very high') account for 4.15%of the total extension of ***,rainfall is considered as an external triggering factor that may induce landslide ***-time satellite-based TMPA3B42 products may provide real rainfall spatial and temporal patterns,which may be used to derive rainfall duration time and *** using a historical record of 60 significant past landslides,the rainfall I-D equation has been *** rainfall duration time that may trigger a landslide has resulted between 3 hours and 45 *** combination of these two aspects can be exploited to simulate the spatiotemporal distribution of rainfall-induced landslide hazards when rainfall events exceed the rainfall I-D thresholds,where the susceptibility category is 'high' or 'very high'.This study shows a useful tool to be part of a systematic landslide simulation methodology,potentially providing useful information for a theoretical basis and practical guide for landslide prediction and mitigation throughout China.

关键词： Surface and subsurface runoff Runoff-produced physical and chemical deposits Precipitated salts and water circulation Groundwater supply mechanism Badain Jaran Desert

Modulation of orbital angular momentum on the propagation dynamics of light fields

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Frontiers of Optoelectronics 2019年第1期12卷 69-87页

作者： Peng li Sheng liU Yi ZHANG Lei HAN dongjing WU Huachao CHENG Shuxia QI Xuyue GUO Jianlin ZHAO MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information TechnologySchool of ScienceNorthwestern Polytechnical UniversityXi’an 710072China

Optical vortices carrying orbital angular momentum(OAM)have attracted extensive attention in recent decades because of their interesting applications in optical trapping,optical machining,optical communication,quantum information,and optical *** effects induced by OAMs,such as angular momentum conversion,spin Hall effect of light(SHEL),and spin– orbital interaction,have also gained increasing *** this article,we provide an overview of the modulations of OAMs on the propagation dynamics of scalar and vector fields in free ***,we introduce the evolution of canonical and noncanonical optical vortices and analyze the modulations by means of local spatial ***,we review the Pancharatnam–Berry(PB)phases arising from spin–orbital interaction and reveal the control of beam evolution referring to novel behavior such as spindependent splitting and polarization singularity ***,we discuss the propagation and focusing properties of azimuthally broken vector vortex beams.

关键词： orbital angular momentum polarization spin angular momentum Pancharatnam-Berry (PB) phase angular diffraction

视频教学结合案例式立体教学法对实习护生PICC维护水平的影响

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临床研究 2024年第5期32卷 186-188页

作者：蒋晓洁杨东静李鹏艳王雅梦董敏鹤壁市人民医院安宁疗护科河南鹤壁458030 鹤壁市人民医院甲乳外科河南鹤壁458030 鹤壁市人民医院消化科河南鹤壁458030 鹤壁市人民医院儿科康复科河南鹤壁458030

目的探讨视频教学结合案例式立体教学法在实习护生中心静脉导管(PICC)维护中的应用效果。方法选取2022年7月至2024年3月期间在鹤壁市人民医院甲乳外科及老年科实习的80例护理实习生作为研究对象,按照随机数表法进行分组,分为研究组与对... 详细信息

目的探讨视频教学结合案例式立体教学法在实习护生中心静脉导管(PICC)维护中的应用效果。方法选取2022年7月至2024年3月期间在鹤壁市人民医院甲乳外科及老年科实习的80例护理实习生作为研究对象,按照随机数表法进行分组,分为研究组与对照组,各40例,对照组进行常规教学模式,研究组给予视频教学结合案例式立体教学法。比较两组PICC维护考核情况、实习满意度。结果研究组理论成绩、操作成绩均高于对照组,差异有统计学意义(P<0.05)。研究组授课形式评分、学习兴趣评分、提高学习效率评分、自学能力评分、临床思维能力评分、理论与实践结合能力评分、团队沟通与协作评分、对PICC教学评分等均高于对照组,差异有统计学意义(P<0.05)。结论视频教学结合案例式立体教学法应用于实习护生PICC维护中,可有效提升实习护生PICC维护水平、实习满意度。

关键词：视频教学案例式立体教学实习护生中心静脉导管实习满意度

Self-accelerated optical activity in free space induced by the Gouy phase

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Photonics Research 2020年第4期8卷 475-481页

作者： PENG li XINHAO FAN dongjing WU SHENG liU YU li JIANliN ZHAO MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information TechnologySchool of Physical Science and TechnologyNorthwestern Polytechnical UniversityXi'an 710129China Northwestern Polytechnical University Ming De College Xi'an 710124China

Optical activity(OA)is the rotation of the polarization orientation of the linearly polarized light as it travels through certain materials that are of mirror asymmetry,including gases or solutions of chiral molecules such as sugars and proteins,as well as *** necessary condition for achieving OA is the birefringence of two circular polarizations in ***,we propose a new kind of self-accelerated OA in free space,based on the intrinsic Gouy phase induced mode birefringence of two kinds of quasi-non-diffracting *** provide a detailed insight into this kind of self-accelerated OA by analyzing angular parameters,including angular direction,velocity,acceleration,and even the polarization transformation *** the Gouy phase exists for any wave,this kind of self-accelerated OA can be implemented in other waves beyond optics,from acoustic and elastic waves to matter waves.

关键词： Self-accelerated optical activity the Gouy phase

Charge Density Wave and Electron-Phonon Interaction in Epitaxial Monolayer NbSe_(2) Films

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Chinese Physics Letters 2021年第10期38卷 25-30页

作者： Xuedong Xie dongjing lin li Zhu Qiyuan li Junyu Zong Wang Chen Qinghao Meng Qichao Tian Shao-Chun li Xiaoxiang Xi Can Wang Yi Zhang National Laboratory of Solid State Microstructure School of PhysicsNanjing UniversityNanjing 210093China Collaborative Innovation Center of Advanced Microstructures Nanjing UniversityNanjing 210093China

Understanding the interplay between superconductivity and charge-density wave(CDW)in NbSe_(2) is vital for both fundamental physics and future device ***,combining scanning tunneling microscopy,angleresolved photoemission spectroscopy and Raman spectroscopy,we study the CDW phase in the monolayer NbSe_(2) films grown on various substrates of bilayer graphene(BLG),SrTiO_(3)(111),and Al_(2)O_(3)(0001).It is found that the two stable CDW states of monolayer NbSe_(2) can coexist on NbSe2/BLG surface at liquid-nitrogen *** the NbSe_(2)/SrTiO_(3)(111)sample,the unidirectional CDW regions own the kinks at±41 meV and a wider gap at 4.2 *** is revealed that the charge transfer from the substrates to the grown films will influence the configurations of the Fermi surface,and induce a 130 meV lift-up of the Fermi level with a shrink of the Fermi pockets in NbSe_(2)/SrTiO_(3)(111)compared with the NbSe2/*** the temperature-dependent Raman experiments,we suggest that the electron-phonon coupling in monolayer NbSe2 dominates its CDW phase transition.

关键词： NbSe2 transition Fermi

视频反馈联合情景模拟教学模式在PICC维护带教中的应用

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国际医药卫生导报 2024年第20期30卷 3513-3517页

作者：杨东静周国丽李静丁冰鑫王雅梦蒋晓洁鹤壁市人民医院甲乳外科鹤壁458030

目的探讨视频反馈联合情景模拟教学模式在经外周静脉穿刺中心静脉置管(PICC)维护带教中的应用效果。方法选取2023年7月至11月于鹤壁市人民医院甲乳外科、消化内科、老年病科、肿瘤内科实习的80名女性护理实习生作为研究对象,按照科室进... 详细信息

目的探讨视频反馈联合情景模拟教学模式在经外周静脉穿刺中心静脉置管(PICC)维护带教中的应用效果。方法选取2023年7月至11月于鹤壁市人民医院甲乳外科、消化内科、老年病科、肿瘤内科实习的80名女性护理实习生作为研究对象,按照科室进行随机分组,分为研究组(41人)与对照组(39人)。研究组年龄(20.29±0.64)岁,学历本科1人、大专40人;对照组年龄(20.18±0.82)岁,学历本科1人、大专38人。研究组采用视频反馈联合情景模拟教学模式进行PICC维护带教,对照组采取常规教学模式进行PICC维护带教,教学周期4周。对比两组一般资料、理论和操作成绩、教学满意度。采用独立样本t检验、χ^(2)检验。结果研究组的理论成绩和操作成绩均高于对照组[(18.24±1.59)分比(15.46±1.00)分、(94.14±1.82)分比(88.57±1.99)分],差异均有统计学意义(均P<0.05)。研究组在激发对PICC专科护士的学习兴趣、团队沟通能力等6个维度的教学满意度均高于对照组,差异均有统计学意义(均P<0.05)。结论将视频反馈联合情景模拟教学模式应用于PICC维护带教中,有利于护理实习生综合素质的培养,进而提高专科护士素养。

关键词：视频反馈情景模拟教学模式 PICC维护护理带教

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大尺寸先进计量技术研究与进展概述

计量科学与技术 2024年第2期68卷 30-39页

作者：李建双缪东晶刘洋赫明钊李连福蒋远林康瑶王德利朱佳祥中国计量科学研究院北京100029 西安理工大学西安710048

大尺寸计量技术是高精度测量或标定大尺寸物体长度、位置姿态和形貌参量的关键技术,在工业制造、大型建造和工业测量等领域具有广泛的应用。伴随先进光学技术、精密测量技术、数据融合技术和工程应用技术的逐步发展,大尺寸计量技术同样... 详细信息

大尺寸计量技术是高精度测量或标定大尺寸物体长度、位置姿态和形貌参量的关键技术,在工业制造、大型建造和工业测量等领域具有广泛的应用。伴随先进光学技术、精密测量技术、数据融合技术和工程应用技术的逐步发展,大尺寸计量技术同样从技术和应用层面均面临不断革新,诞生一系列大尺寸先进计量新技术,打破传统大尺寸计量中单一量值和离线溯源的瓶颈,逐步向复合参量和原位溯源进行过渡,进一步向实现数字化、扁平化和智能化的高精度大尺寸计量变革。通过介绍大尺寸计量中室内工业测量和室外大地测量中的先进计量技术,为大尺寸计量未来的发展趋势进行了展望和分析,并为先进大尺寸计量技术的进一步发展提供了新思路。

关键词：计量学大尺寸计量工业计量大地测量量值溯源复合参量数字化

Polarization oscillating beams constructed by copropagating optical frozen waves

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Photonics Research 2018年第7期6卷 756-761页

作者： PENG li dongjing Wu YI ZHANG SHENG liU Yu li SHUXIA QI JIANliN ZHAO MOE Key Laboratory of Material Physics and Chemistry under Extraordinary Conditions and Shaanxi Key Laboratory of Optical Information TechnologySchool of ScienceNorthwestern Polytechnical UniversityXi'an 710129China Department of Public Education Northwestern Polytechnical University Ming De CollegeXi'an 710124China

Polarization oscillating beams, namely, polarization standing waves, commonly formed by a pair of coherent counterpropagating light waves with orthogonal polarizations, oscillate their states of polarization periodically within a wavelength interval, offering conceptual and practical interests in light-matter interactions such as the nonreciprocal magnetoelectric effect, and impressive applications in optical imaging, sensing, and chirality detection. Here, we propose a new class of polarization oscillating beams that longitudinally vary states of polarization with spatial intervals within centimeters via the superposition of two copropagating optical frozen waves with preshaped longitudinal intensity profiles and transverse phase structures. The flexibility and manipulability are demonstrated by creating several polarization oscillating beams with different polarization structures. This work paves a new way to manipulate other waves and may be useful for applications of optical standing waves in optical manipulation, light guiding of atoms, polarization-sensitive sensing, etc.

关键词：偏振振荡光束光波通信技术理论分析

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全站仪测尺频率测量与温度影响研究

计量科学与技术 2024年第5期68卷 37-43页

作者：刘洋李连福王德利蒋远林李建双刘晓东缪东晶赫明钊中国计量科学研究院北京100029 中国计量大学杭州310018

全站仪是集成测距、测角和坐标测量的高精度测量仪器,在基础设施建造和大地测量等领域均具有广泛且重要的应用。其中,测尺频率的变化是全站仪测距乘常数的主要来源,是关联仪器测距特性的基本参量,能够从本质上表征测量仪器的测距乘常数... 详细信息

全站仪是集成测距、测角和坐标测量的高精度测量仪器,在基础设施建造和大地测量等领域均具有广泛且重要的应用。其中,测尺频率的变化是全站仪测距乘常数的主要来源,是关联仪器测距特性的基本参量,能够从本质上表征测量仪器的测距乘常数水平。通过研制全站仪测尺频率的自动测量系统,利用能够参考至高精度频率标准的测量技术实现对全站仪测尺频率的实时动态测量。同时,基于研制的全站仪测尺频率自动测量系统,通过控制环境温度的方式,对全站仪测尺频率的温度特性进行了深入研究。对进一步评价全站仪测距性能,明确全站仪检定校准过程中测距乘常数来源具有重要意义。

关键词：计量学全站仪测尺频率测距乘常数温度影响