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Edge detection of potential field data based on image processing methods

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Global Geology 2018年第2期21卷 134-142页

作者： tan xiaodi ZHANG Dailei MA Guoqing College of Geo-Exploration Science and Technology Jilin University

The conventional methods of edge detection can roughly delineate edge position of geological bodies,but there are still some problems such as low detection accuracy and being susceptible to noise *** this paper,three image processing methods,Canny,Lo G and Sobel operators are briefly introduced,and applied to edge detection to determine the edge of geological ***,model data is built to analyze the edge detection ability of this image processing methods,and compare with conventional *** with gravity anomaly of Sichuan basin and magnetic anomaly of Zhurihe area,the detection effect of image processing methods is further verified in real *** results show that image processing methods can be applied to effectively identify the edge of geological ***,when both positive and negative anomalies exist and noise is abundant,fake edge can be avoided and edge division is clearer,and satisfactory results of edge detection are obtained.

关键词： edge detection image processing Canny operator LoG operator Sobel operator

Linear polarization holography

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Opto-Electronic Science 2022年第2期1卷 10-29页

作者： Jinyu Wang xiaodi tan Peiliang Qi Chenhao Wu Lu Huang Xianmiao Xu Zhiyun Huang Lili Zhu Yuanying Zhang Xiao Lin Jinliang Zang Kazuo Kuroda College of Photonic and Electronic Engineering Fujian Normal UniversityFuzhou 350108China Fujian Provincial Key Laboratory of Photonics Technology Fujian Normal UniversityFuzhou 350108China Key Laboratory of Opto-Electronic Science and Technology for Medicine of Ministry of Education Fujian Normal UniversityFuzhou 350108China Fujian Provincial Engineering Technology Research Center of Photoelectric Sensing Application Fujian Normal UniversityFuzhou 350108China National Institute of Metrology Chaoyang DistrictBeijing 100029China Institute of Industrial Science The University of TokyoMeguro-kuTokyo 153-8505Japan

Polarization holography is a newly researched field,that has gained traction with the development of tensor *** primarily focuses on the interaction between polarization waves and photosensitive *** extraordinary capabil-ities in modulating the amplitude,phase,and polarization of light have resulted in several new applications,such as holo-graphic storage technology,multichannel polarization multiplexing,vector beams,and optical functional *** this paper,fundamental research on polarization holography with linear polarized wave,a component of the theory of polariz-ation holography,has been ***,the effect of various polarization changes on the linear and nonlinear po-larization characteristics of reconstructed wave under continuous exposure and during holographic recording and recon-struction have been focused *** polarization modulation realized using these polarization characteristics exhibits unusual functionalities,rendering polarization holography as an attractive research topic in many fields of *** paper aims to provide readers with new insights and broaden the application of polarization holography in more sci-entific and technological research fields.

关键词： polarization holography tensor theory polarization modulation linear and nonlinear polarization characteristics

Improved phase retrieval in holographic data storage based on a designed iterative embedded data

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Frontiers of Optoelectronics 2021年第4期14卷 529-539页

作者： Changyu YU Suping WANG Ruixian CHEN Jianying HAO Qijing ZHENG Jinyu WANG Xianying QIU Kun WANG Dakui LIN Yi YANG Hui LI Xiao LIN xiaodi tan Information Photonics Research Center College of Photonic and Electronic EngineeringFujian Normal UniversityFuzhou 350117China Fujian Provincial Key Laboratory of Photonics Technology Fuzhou 350117China Key Laboratory of OptoElectronic Science and Technology for Medicine of Ministry of Education Fuzhou 350117China Wuhan National Laboratory for Optoelectronics Wuhan 430074China

Embedded data are used to retrieve phases quicker with high accuracy in phase-modulated holographic data storage(HDS).We propose a method to design an embedded data distribution using iterations to enhance the intensity of the high-frequency signal in the Fourier *** proposed method increases the antinoise performance and signal-to-noise ratio(SNR)of the Fourier spectrum distribution,realizing a more efficient phase *** indicate that the bit error rate(BER)of this method can be reduced by a factor of one after 10 iterations.

关键词： holographic data storage(HDS) phase retrieval embedded data high frequency

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多维调制的全息加密光存储

中国激光 2023年第18期50卷 127-137页

作者：林达奎宋海洋李枷楠王琨林枭谭小地福建师范大学光电与信息工程学院福建福州350117 医学光电科学与技术教育部重点实验室福建福州350117 福建省光子技术重点实验室福建福州350117 福建省光电传感应用工程技术研究中心福建福州350117 福建师范大学信息光子学研究中心福建福州350117

大数据时代对数据存储提出了新的需求,数据的存储安全关乎社会稳定与发展。全息加密光存储具有高存储密度、快读取速度、长保存寿命等特点,为海量数据存储提供了有效的解决方案,是保障数据存储安全的有力手段。聚焦于全息光存储领域,论... 详细信息

大数据时代对数据存储提出了新的需求,数据的存储安全关乎社会稳定与发展。全息加密光存储具有高存储密度、快读取速度、长保存寿命等特点,为海量数据存储提供了有效的解决方案,是保障数据存储安全的有力手段。聚焦于全息光存储领域,论述了以振幅、相位和偏振等作为调制变量的全息加密光存储的基本原理,介绍了常见的全息加密光存储技术及其性能影响因素,梳理了大量密钥的管理方法,最后总结了各技术特点,并对全息加密光存储的未来发展进行了展望。

关键词：全息全息存储全息加密光存储光的多维调制存储安全

基于地貌单元的北京地区场地V_(S30)分类研究

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地震工程与工程振动 2022年第6期42卷 246-252页

作者：孙佳珺孟勇琦谭晓迪赵帅李占飞北京市地震局北京100080 中国地震局地质研究所北京100029

工程场地30 m等效剪切波速(V_(s30))是衡量场地放大效应的一个重要参数。通过收集北京地区1:100 000精度地貌图、北京地区419个工程场地钻孔资料,统计了每一个实测孔的V_(s30)值。对每一类地貌下包含的钻孔资料,选取高程、地形坡度和到... 详细信息

工程场地30 m等效剪切波速(V_(s30))是衡量场地放大效应的一个重要参数。通过收集北京地区1:100 000精度地貌图、北京地区419个工程场地钻孔资料,统计了每一个实测孔的V_(s30)值。对每一类地貌下包含的钻孔资料,选取高程、地形坡度和到山的距离3个因素作为影响一类地貌单元V_(s30)的因子,进行多元线性回归分析,得到不同地貌单元属性的区域性V_(s30)估算公式。根据估算值与实测值间的残差,通过插值得到区域性的残差分布结果。将残差分布结果与估算V_(s30)结果叠加,得到区域性V_(s30)修正结果。再根据美国国家减灾计划(NEHRP)的场地分类结果对基于回归模型的V_(s30)结果、修正后的V_(s30)结果分别进行场地分类,经对比认为修正后的场地分类结果正确率高于修正前的结果。该方法及得到的认识对于工程场地分类、地震动作用下场地放大效应的估计和震后地震灾害评估,都具有一定的实用价值。

关键词：钻孔地貌场地分类 V_(s30) 多元线性回归

Alteration of the health effects of bioaerosols by chemical modification in the atmosphere:A review

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Fundamental Research 2024年第3期4卷 463-470页

作者： Ailin Li Xinghua Qiu Xing Jiang xiaodi Shi Jinming Liu Zhen Cheng Qianqian Chai Tong Zhu State Key Joint Laboratory for Environmental Simulation and Pollution Control College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China

Bioaerosols are a subset of important airborne particulates that present a substantial human health hazard due to their allergenicity and *** reactions in atmospheric processes can significantly influence the health hazard presented by bioaerosols;however,few studies have summarized such alterations to bioaerosols and the mechanisms *** this paper,we systematically review the chemical modifications of bioaerosols and the impact on their health effects,mainly focusing on the exacerbation of allergic diseases such as asthma,rhinitis,and ***,nitration,and oligomerization induced by hydroxyl radicals,ozone,and nitrogen dioxide are the major chemical modifications affecting bioaerosols,all of which can aggravate allergenicity mainly through immunoglobulin E *** processes can even interact with climate change including the greenhouse effect,suggesting the importance of bioaerosols in the future implementation of carbon neutralization *** summary,the chemical modification of bioaerosols and the subsequent impact on health hazards indicate that the combined management of both chemical and biological components is required to mitigate the health hazards of particulate air pollution.

关键词： Bioaerosols Allergenicity Chemical modification Airpollution Climate change

Biological function of miRNA-145-5p in angiotensin II induced renal inflammation

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BIOCELL 2024年第4期48卷 601-611页

作者： BIN LI YUCHENG SHENG XIAOYING XU SHENGCUN WANG HONGYAN SONG JINGYUAN LI HAONAN JI QINGHUA WANG xiaodi ZHOU LONGJU QI Department of Pediatrics Affiliated Hospital of Nantong UniversityNantong226001China Department of Science and Education Affiliated Nantong Hospitalof Nantong UniversityNantong226001China Laboratory Animal Center Nantong UniversityNantong226001China Department of Gynecology and Obstetrics and Department of Oncology Hai’an Hospital Affiliated to Nantong UniversityNantong226600China

Objective:Chronic kidney disease(CKD)is a progressive disorder characterized by intricate structural and functional alterations in the kidneys,attributable to diverse causative ***,the therapeutic promise of miR-145-5p in addressing renal pathologies has been *** investigation seeks to elucidate the functional role of miR-145-5p in injured kidneys by subjecting human glomerular mesangial cells(HGMCs)to stimulation with Angiotensin II(AngII).Materials and Methods:Cellular viability and the levels of inﬂammatory mediators were evaluated utilizing Cell Counting Kit-8(CCK-8),quantitative real-time polymerase chain reaction(qRT-PCR),and western blot methodologies,both in the presence of AngII incubation and in scenarios of miR-145p overexpression and ***,the cell cycle dynamics were elucidated through Fluorescence-activated Cell Sorting(FACS)***:AngII incubation induced an upregulation of miR-145-5p and inﬂammatory factors including Intercellular Adhesion Molecule 1(ICAM-1),Interleukin 6(IL-6),Interleukin 8(IL-8),and Interleukin 1β(IL-1β).Additionally,it elevated the expression of Cyclin A2,Cyclin D1,and the G2/M cell cycle ***,inhibition of miR-145-5p heightened the levels of inﬂammatory factors and cell cycle regulators induced by AngII *** expression of miR-145-5p correlated with a downregulation of Interleukin 10(IL-10)expression,concurrently promoting HGMC proliferation under AngII ***,ectopic miR-145-5p expression demonstrated a reduction in inﬂammatory factors,cell cyclin regulators,G2/M cell cycle ratio,and overall ***:MiR-145-5p exhibited inhibitory effects on the inﬂammatory response and proliferation induced by Angiotensin II in HGMCs,showcasing its potential as a therapeutic avenue for the treatment of kidney injury.

关键词： miR-145-5p Kidney Angiotensin II Cell cycle Inflammation

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同轴式光全息存储技术及其系统

光学学报 2006年第6期26卷 827-830页

作者：谭小地堀米秀嘉光技术企业公司

同轴式光全息存储技术是新型超大容量超高速存取的光学存储技术。具有反射式结构的光盘可以将再现光反射回聚焦透镜,因而可以简化系统结构,而且可与现有的光盘系统(如CD和DVD)很好地兼容。引进现有光盘的伺服控制技术可以有效地保持聚... 详细信息

同轴式光全息存储技术是新型超大容量超高速存取的光学存储技术。具有反射式结构的光盘可以将再现光反射回聚焦透镜,因而可以简化系统结构,而且可与现有的光盘系统(如CD和DVD)很好地兼容。引进现有光盘的伺服控制技术可以有效地保持聚焦透镜与光盘间距和精确定位,因而,可将全息图准确无误地记录在媒体中并准确无误地再生出来而不受外界的振动影响。首先讨论了传统的“双光束干涉法”在商品化方面遇到的难题,从而引出了同轴式光全息存储技术并演示了它的记录、再生的实验结果。通过实验数据分析计算了该光盘系统的角度偏差和光源波长容限范围。为实现装置的低成本和小型化等方面提供了理论依据。

关键词：全息光全息存储器光盘系统容限

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多维调制全息数据存储研究进展

光学学报 2023年第15期43卷 45-69页

作者：谭小地林枭臧金亮范凤兰刘金鹏任宇红郝建颖福建师范大学光电与信息工程学院福建福州350117 中国计量科学研究院北京100029 河北民族师范学院化学与化工学院河北承德067000 西安电子科技大学光电工程学院陕西西安710071

大数据时代对数据存储提出了新的要求,为克服目前存储技术无法逾越的障碍,全息存储回到人们的视野,为了解决传统全息存储的记录密度与理论值相差较大的问题,本文作者团队提出了将光的振幅、相位和偏振均作为调制变量的多维调制全息数据... 详细信息

大数据时代对数据存储提出了新的要求,为克服目前存储技术无法逾越的障碍,全息存储回到人们的视野,为了解决传统全息存储的记录密度与理论值相差较大的问题,本文作者团队提出了将光的振幅、相位和偏振均作为调制变量的多维调制全息数据存储技术;为验证多维调制的实验结果,针对具有偏振响应的全息存储材料特性提高方面也开展了研究。这些研究成果加速了全息存储技术应用的产业化步伐。本文以该团队在北京理工大学期间开展的多维调制全息数据存储技术的研究成果为基础,分别从光的振幅、相位和偏振调制机理出发,综述了各个调制方法的理论基础和应用实例,以及提高全息存储材料性能的有效手段,最后进行了总结和展望。

关键词：全息存储多维调制大数据保存存储密度