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High-Sensitivity Temperature Sensor Based on Polarization Maintaining Fiber Sagnac Loop

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Photonic Sensors 2019年第1期9卷 25-32页

作者： Laipeng SHAO Junhui HU Hanglin LU jing du Tianyin WU Yiping WANG Key Laboratory of Optoelectronic Devices and System of Ministry of Education and Guangdong Province College of Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China College of Physics Science and Technology Guangxi Normal UniversityCruilin 541001China

A high-sensitivity all-fiber temperature sensor based on a Sagnac interferometer is demonstrated by splicing a section of polarization maintaining fiber(PMF)between two sections of standard single mode fibers(SMFs).In this sensor,the SMF-PMF-SMF structure in the Sagnac loop is bent into a circle to enhance the *** length and curvature of the PMF in the loop are investigated and can be optimized to further increase the temperature sensitivity of the sensor. Results show that the radius of the circle has an important effect upon temperature sensitivity due to the bend-induced birefringence variation of the *** SMF-PMF-SMF structure bent into a circle with a radius of 30mm exhibits a high-sensitivity temperature of 1.73nm/℃.The sensor is provided with the advantages of easy fabrication,low-insertion loss,and high sensitivity,which may find potential applications in the field of high precision temperature measurement.

关键词： Optical fiber sensor polarization maintaining fiber temperature sensor Sagnac loop

Superscattering-enhanced narrow band forward scattering antenna

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Chinese Physics B 2015年第10期24卷 191-194页

作者：胡德骄张志友杜惊雷 College of Physical Science and Technology Sichuan University High Energy Density Physics of the Ministry of Education Key Laboratory Sichuan University Sino-British Joint Materials Research Institute Sichuan University

We present a narrow band forward scattering optical antenna which is based on the excitation of distinctive whispering gallery modes（WGMs）. The antenna is composed of three coaxial cylinder layers： a dielectric layer is sandwiched between a metallic core and cladding. Owing to the destructive interference between the scattering of the outer metallic cladding and the WGM in the backward direction, the power flow in the forward direction is increased. Simulation and analysis show that in proper geometry conditions, the cavity can be tuned into a superscattering state. At this state, both the zeroth and the first order of WGM are excited and contribute to the total scattering. It is shown that the power ratio（power towards backward divided by power towards forward） can be enhanced to about 27 times larger than that for a non-resonant position by the superscattering. Owing to the confinement of the cladding to WGMs, the wavelength range of effective forward scattering is considerably narrow（about 15 nm）.

关键词： surface plasmons optical antenna directional scattering Fano resonance

Molecular mechanism of icariin on rat asthmatic model

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Chinese Medical Journal 2011年第18期124卷 2899-2906页

作者： XU Chang-qing LE jing-jing duAN Xiao-hong du Wei-jing LIU Bao-jun WU jing-feng CAO Yu-xue DONG jing-cheng Integrative Department Huashan Hospital Affiliated to FudanUniversity Shanghai 200040 China

Background Effects of icariin on airway inflammation in asthmatic rats and the intervention of LPS induced inflammation are interfered with the machanism of icariin. Our study aimed to observe the effect of icariin on ovalbumin-induced imbalance of Th1/Th2 cytokine expression and its mechanism. Methods Sixty male SD rats were randomly divided into control group （PBS）, asthma group （ovalbumin （OVA）-induced） dexamethasone group, and OVA＋icariin low, medium and high dose groups （5, 10, 20 mg/kg, respectively）. Each group had ten rats. The model of OVA sensitization was a rat asthma model. Enzyme-linked immunosorbent assay （ELISA） method was used to observe the effects of icariin on interleukin-4 （IL-4） and inerferon y （IFN-y） in rats＇ lung tissue. Immunohistochemical staining was applied to detect the intervention effects of icadin on T cells （T-bet） and gatabinding protein 3 （GATA-3） in rat pulmonary tissue. Realtime RT-PCR was used to observe the intervention effects of icariin on T-bet and GATA-3 mRNA expression in rat pulmonary tissue and spleen lymphocytes. Western blotting was used to observe the icariin intervention effects on T-bet, GATA-3 and nuclear factor-Kappa B （NF-KB） p65 protein expressions in rat pulmonary tissue. Results The ELISA results from pulmonary tissue showed that IL-4 expression was significantly reduced （P 〈0.05）, while the IFN-y expression increased but not significantly when we compared OVA＋icariin medium and high dose groups with the asthma group. Immunohistochemical staining of pulmonary tissue showed that the GATA-3 decreased significantly while the T-bet staining did not change in the OVA＋icariin high dose group. In pulmonary tissue and spleen lymphocytes T-bet and GATA-3 mRNA expressions were significantly reduced （P 〈0.05） in icariin treatment groups compared with the asthma model group. GATA-3 and T-bet mRNA in rat spleen lymphocytes in the asthma group were higher than in the control group. GATA-3 mRNA expression in pulmonary tissue

关键词： icariin Th1/Th2 T-bet/GATA-3 nuclear factor Kappa B p65

Gravel coverage rate measurement in synchronous chip seal based on deep convolutional neural network

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Optoelectronics Letters 2018年第6期14卷 447-451页

作者： YIN Shi-hao DENG Ji-cai MA Yan du jing-yuan SHANG Xiao-kai School of Information Engineering Zhengzhou University

Synchronous chip seal is an advanced road constructing technology, and the gravel coverage rate is an important indicator of the construction quality. In this paper, a novel approach for gravel coverage rate measurement is proposed based on deep learning. Convolutional neural network(CNN) is used to segment the image of ground covered with gravels, and the gravel coverage rate is computed by the percentage of gravel pixels in the segmented image. The gravel coverage rate dataset for model training and testing is built. The performance of fully convolutional neural network(FCN) and U-Net model in the dataset is tested. A better model named GravelNet is constructed based on U-Net. The scaled exponential linear unit(SELU) is employed in the GravelNet to replace the popular combination of rectified linear unit(ReLU) and batch normalization(BN). Data augmentation and alpha dropout are performed to reduce overfitting. The experimental results demonstrate the effectiveness and accuracy of our proposed method. Our trained GravelNet achieves the mean gravel coverage rate error of 0.35% on test dataset.

关键词： deep convolutional neural network synchronous chip sea Gravel coverage

从头面部测量性状分析中国现代人群体质类型及其成因

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解剖学报 2019年第6期50卷 805-815页

作者：杜抱朴杜靖首都医科大学基础医学院人体解剖学与组织学胚胎学系北京100069 青岛大学中国法律人类学研究中心山东青岛266071

目的探讨中国现代人群的体质类型及地理环境因素对人群体质的影响。方法选取中国134例现代人群中的14项头面部测量指标进行主成分聚类分析,同时分析上述指标与8项地理环境因素间的线性关系。结果依据头面部测量指标可将中国现代人群... 详细信息

目的探讨中国现代人群的体质类型及地理环境因素对人群体质的影响。方法选取中国134例现代人群中的14项头面部测量指标进行主成分聚类分析,同时分析上述指标与8项地理环境因素间的线性关系。结果依据头面部测量指标可将中国现代人群分为南方组和北方组两个类群,其中北方组中汉族与其他少数民族混合聚类,而南方组中汉族和少数民族各自聚类而后汇聚一起。多数头面部测量性状与地理环境因素(平均风速除外)成中等程度或低度线性相关。其中容貌耳长和容貌耳宽与温度成中等程度负相关,表明艾伦法则可能并不适用于现代人耳部。结论中国现代人群的南北体质差异可能源于气候驱动的适应性变化,以中国南北地理气候分界带(秦岭-淮河)作为分界线更为适宜。

关键词：头面部测量指标地理环境因素南北分化主成分分析中国现代人群

从系谱宗族到实体宗族:明代中后期以来中国宗族的发育与演化——以山东滕阳闵氏宗族为例

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中央民族大学学报（哲学社会科学版） 2017年第2期44卷 35-43页

作者：杜靖青岛大学法学院山东青岛266071

以往中国宗族研究多从要素主义角度入手,或者突出若干项因素,或者仅注重一项因素,故有宗族是系谱性还是功能性之争论。前者把系谱当做唯一要素,后者把系谱连同祠堂、族产、组织等理解为构成宗族的诸平等要素。山东滕州闵楼村闵氏宗族自... 详细信息

以往中国宗族研究多从要素主义角度入手,或者突出若干项因素,或者仅注重一项因素,故有宗族是系谱性还是功能性之争论。前者把系谱当做唯一要素,后者把系谱连同祠堂、族产、组织等理解为构成宗族的诸平等要素。山东滕州闵楼村闵氏宗族自明朝中后期开基以来,在明清两代以迄民初,经历了从系谱宗族到实体性宗族的发育与演化过程。这一过程表明,不同历史阶段,农人在实践不同宗族概念:一种是系谱宗族,一种是实体性宗族(即功能宗族)。对于中国大部分地区的造族运动而言,一般是先造一个系谱宗族,待经济和社会地位等条件具备以后,就赋予其各种功能,从而变成具有实际作用的架构。系谱不应该被简单理解成一项造族因素。

关键词：要素主义系谱宗族实体性宗族

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山东滕州闵氏族谱“传记”的书写原则

青海民族研究 2015年第4期26卷 30-38页

作者：杜靖青岛大学山东青岛266071

山东滕州闵氏宗族自明嘉靖二十六年开始至1993年共进行了五次修谱,其中收录了50篇传记。其中涉及男性传记28篇,女性传记22篇。这些传记体现了三个基本特征:一是传记作者全为乡村社会中的低阶士绅或掌握文字的儒生,并非普通乡村农人,族... 详细信息

山东滕州闵氏宗族自明嘉靖二十六年开始至1993年共进行了五次修谱,其中收录了50篇传记。其中涉及男性传记28篇,女性传记22篇。这些传记体现了三个基本特征:一是传记作者全为乡村社会中的低阶士绅或掌握文字的儒生,并非普通乡村农人,族谱传记往往是他们这类人群的"自传";二是部分传主与传记作者之间的关系要么是父系亲属,要么是姻亲,要么存在乡土或乡亲关系;三是女性传主大致具有统一的人生模式,或为夫殉节而死,或为存续夫族而做出贡献。此三项特征分别对应着三个基本原则:书写者自我投射原则、书写者自我扩展原则、男性书写霸权原则。由此可以看出,族谱是特定人群表达自我意志的一个工具。

关键词：书写者自我投射书写者自我扩展男性书写霸权作为表达工具的族谱

直义与转义:山西沁县“铜鞮吴氏人文志”的历史表述技巧

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青海民族研究 2016年第2期27卷 28-37页

作者：杜靖青岛大学山东青岛266071

把书写行为作为人类学研究对象在西方知识系谱上是较晚的事情。如果将这一视角运用到文献中国观察上,则会给我们带来无穷的学术想象空间。就书写对象而言,山西《铜鞮吴氏人文志》集集体表象史书写和多样性个体生命史书写于一身。就编写... 详细信息

把书写行为作为人类学研究对象在西方知识系谱上是较晚的事情。如果将这一视角运用到文献中国观察上,则会给我们带来无穷的学术想象空间。就书写对象而言,山西《铜鞮吴氏人文志》集集体表象史书写和多样性个体生命史书写于一身。就编写者而言,同样也投射了宗族集体心智和执笔者的心智,因而该书是作者及其所归属群体的文化自恋和时代挽歌。就叙事技巧而论,既有直义陈述又有转义陈述,因而必须动用直义阅读和转义阅读两种策略。

关键词：直义陈述转义陈述写文化行为集体表象史书写个体历史与意识

中国现代人群上、下肢形态与环境温度的相关性分析

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人类学学报 2021年第4期40卷 644-652页

作者：杜抱朴杜靖首都医科大学基础医学院人体解剖学与组织胚胎学系解剖学教研室北京100069 青岛大学中国法律人类学研究中心青岛266071

观察中国不同区域内现代人群四肢形态变化是否与艾伦法则相一致。本文搜集中国各区域102处地点的现代人群上、下肢测量性状中17项指标,探讨其与温度(年平均温度、年最高温度、年最低温度和气温年较差)间的线性关系。结果表明,随着环境... 详细信息

观察中国不同区域内现代人群四肢形态变化是否与艾伦法则相一致。本文搜集中国各区域102处地点的现代人群上、下肢测量性状中17项指标,探讨其与温度(年平均温度、年最高温度、年最低温度和气温年较差)间的线性关系。结果表明,随着环境温度降低,中国现代人的上肢相对长度逐渐变短,前臂和手则逐渐增粗;下肢(下肢全长、大腿长和小腿长)逐渐变长,且下肢相对长度同样渐增。手长、手宽、上臂围和前臂围与气温年较差呈正相关,而身高上肢长指数与气温年较差呈负相关;下肢全长、大腿长、足长和小腿围与气温年较差呈正相关。环境温度作为一项选择性压力,作用于上肢发育或形态塑造过程的显著程度上要高于下肢。中国现代人群的四肢形态变化规律并不完全符合艾伦法则,可能与遗传、地理环境、功能性需求、生存策略和营养等因素共同影响现代人群的四肢发育密切相关。

关键词：艾伦法则中国现代人群温度四肢环境适应性