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Comparing imaging capabilities of spectral domain and swept source optical coherence tomography angiography in healthy subjects and central serous retinopathy

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Eye and Vision 2018年第1期5卷 182-190页

作者： fupeng wang Qinqin Zhang Anthony J.Deegan Jun Chang Ruikang K.wang Department of Bioengineering University of WashingtonSeattleWashington 98105USA School of Information Science and Engineering Shandong UniversityJinan 250100China

Background:There are two forms of system implementation of optical coherence tomography angiography(OCTA)in ophthalmic imaging,i.e.,spectral domain(SD-)and swept source OCTA(SS-OCTA).The purpose of this paper is to compare the SD-OCTA and SS-OCTA for elucidating structural and vascular features associated with central serous retinopathy(CSR),and to evaluate the effects of CSR on SD-and SS-OCTA’s imaging ***:Normal subjects and CSR patients were imaged by SD-and SS-OCTA using 3×3 mm and 6×6 mm scan *** signal strengths at the superficial retina,deep retina,Sattler’s layer and Haller’s layer were used to compare the ability of SD-and SS-OCTA to image structural *** addition,the ability to acquire angiograms were discussed by evaluating retinal vessel *** serous volume(CSV)was measured and it was correlated with difference in signal strengths(ΔS)between two OCTA ***:Seven normal eyes and seven diseased eyes were *** showed no significant differences between SD-and SS-OCT in detecting structural features of the retinal layer according to the paired ***,when imaging the Sattler’s layer for normal eyes,a significant difference is found between SD-and SS-OCT(p<0.0001 for 3×3 mm scan,and p=0.0002 for 6×6 mm);while for CSR eyes,the corresponding values were p<0.0001 and p=0.0003,*** Haller’s layer for normal eyes,the corresponding values were p=0.0004 and p=0.0014;and for CSR eyes,p=0.0004 and p<0.0001,respectively.A strong correlation betweenΔS and CSV was observed in the Sattler’s layer(3×3 mm–p=0.0031 and R^(2)=0.951;6×6 mm–p=0.0075 and R^(2)=0.911)and Haller’s layer(3×3 mm–p=0.0026 and R^(2)=0.955;6×6 mm–p=0.0013 and R^(2)=0.972).Conclusions:The results suggest no differences between SD-and SS-OCTA for imaging the retinal layers however,when imaging beyond retinal layers,SS-OCTA appears advantageous in detecting returning *** CSR cases,the CSV may have an impact on sub-C

关键词： Optical coherence tomography Spectral domain OCTA Swept source OCTA Central serous retinopathy Signal strength Central serous volume

A Phase Shift Demodulation Technique： Verification and Application in Fluorescence Phase Based Oxygen Sensors

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Photonic Sensors 2016年第2期6卷 169-176页

作者： Chuanwu JIA Jun CHANG fupeng wang Hao JIANG Cunguang ZHU Pengpeng wang School of Information Science and Engineering and Shandong Provincial Key Laboratory of Laser Technology andApplication Shandong University Jinan 250100 China School of Physics and Technology University of Jinan Jinan 250022 China

A phase shift demodulation technique based on subtraction capable of measuring 0.03 phase degree limit between sinusoidal signals is presented in this paper. A self-gain module and a practical subtracter act the kernel parts of the phase shift demodulation system. Electric signals in different phases are used to verify the performance of the system. In addition, a new designed optical source, laser fiber differential source （LFDS）, capable of generating mini phase is used to further verify the system reliability. R-square of 0.99997 in electric signals and R-square of 0.99877 in LFDS are achieved, and 0.03 degree measurement limit is realized in experiments. Furthermore, the phase shift demodulation system is applied to the fluorescence phase based oxygen sensors to realize the fundamental function. The experimental results reveal that a good repetition and better than 0.02% oxygen concentration measurement accuracy are realized. In addition, the phase shift demodulation system can be easily integrated to other applications.

关键词： Phase shift detection system self-gain, subtracter LFDS phase based oxygen sensor

A Portable Analog Lock-In Amplifier for Accurate Phase Measurement and Application in High-Precision Optical Oxygen Concentration Detection

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Photonic Sensors 2017年第1期7卷 27-36页

作者： Xi CHEN Jun CHANG fupeng wang Zongliang wang Wei WEI Yuanyuan LIU Zengguang QIN School of Information Science and Engineering and Shandong Provincial Key Laboratory of Laser Technology andApplication Shandong University Jinan 250100 China School of Physics Science and Information Technology and Shandong Key Laboratory of Optical CommunicationScience and Technology Liaocheng University Liaocheng 252059 China

A portable analog lock-in amplifier capable of accurate phase detection is proposed in this paper. The proposed lock-in amplifier, which uses the dual-channel orthometric signals as the references to build the xy coordinate system, can detect the relative phase between the input and x-axis based on trigonometric function. The sensitivity of the phase measurement reaches 0.014degree, and a detection precision of 0.1 degree is achieved. At the same time, the performance of the lock-in amplifier is verified in the high precision optical oxygen concentration detection. Experimental results reveal that the portable analog lock-in amplifier is accurate for phase detection applications. In the oxygen sensing experiments, 0.058% oxygen concentration resulted in 0.1 degree phase shift detected by the lock-in amplifier precisely. In addition, the lock-in amplifier is small and economical compared with the commercial lock-in equipments, so it can be easily integrated in many portable devices for industrial applications.

关键词： Portable analog lock-in amplifier phase shift measurement high accuracy optical oxygen detection

论《红楼梦》人物体系的设置与叙事结构的形成

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红楼梦学刊 2023年第4期 28-42页

作者：王富鹏广州大典研究中心 510623

人物形象是传达题旨的工具,也是小说的二级神经枢纽,生成和支配着情节及其走向,是推动情节发展的原动力。人物形象具有结构功能。人物体系是整部小说的支柱体系,是形成小说内在结构的基本因素。人物体系的形成有赖于人物之间显性的和隐... 详细信息

人物形象是传达题旨的工具,也是小说的二级神经枢纽,生成和支配着情节及其走向,是推动情节发展的原动力。人物形象具有结构功能。人物体系是整部小说的支柱体系,是形成小说内在结构的基本因素。人物体系的形成有赖于人物之间显性的和隐性的关系。家族、僚属、主仆等显性的人物关系是生成小说结构的基本动力,关乎着叙事的基本走向。《红楼梦》中姻亲世交多个家族形成的社会网络关乎着贾府的盛衰。贾府的盛衰是小说的叙事主线,关乎着小说的整体结构。贾氏五代人物行辈关系的设置确定了贾府由盛而衰的命运和小说的叙事走向。元、迎、探、惜四大小姐体现了小说内在的起承转合的整体结构。主仆之间的映衬互补,及其互动推动了情节发展,不同形象单元之间的互动生成更为复杂的情节和情节运动,对小说局部结构的形成有重要影响。

关键词：人物体系结构功能叙事情节

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《红楼梦》的人物韵文与小说的叙事结构

红楼梦学刊 2024年第3期 46-62页

作者：王富鹏广州大典研究中心 510623

《红楼梦》人物韵文大致分为宴饮酒令、诗会题咏和个人的即兴咏叹三类。人物的吟咏活动不但是小说的故事和情节,而且大体上起、承、转、合,自成线索和结构。某些吟咏活动也是小说结构的重要支点,对小说的散文叙事起到了界画作用。人物... 详细信息

《红楼梦》人物韵文大致分为宴饮酒令、诗会题咏和个人的即兴咏叹三类。人物的吟咏活动不但是小说的故事和情节,而且大体上起、承、转、合,自成线索和结构。某些吟咏活动也是小说结构的重要支点,对小说的散文叙事起到了界画作用。人物韵文与小说的散文叙事一起共同构造了整部小说庞大的叙事结构。

关键词：人物韵文诗会题咏叙事结构散文叙事

Mechanical Frequency Spectrum Sub-band Feature Estimation Based on Multiple Types Correlation Analysis

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Mechanical Frequency Spectrum Sub-band Feature Estimation Ba...

第三十九届中国控制会议

作者： Jian Tang Meiying Jia fupeng wang Jian Zhang Gang Yu Faculty of Information Technology Beijing University of Technology 55th Institute Joint staff of the Central Military Commission 91411 Unit PLA College of computer and software Nanjing University of Information Science and Technology State Key Laboratory of Process Automation in Mining & Metallurgy

Mill load is one of the key factors that affects the operation optimization and control of grinding process. It is difficult to detect accurately in real time. The mill load relates to multiple channel mechanical signals, such as the mill shell vibration signals, the shaft seat front and rear vibration signals, the acoustic signals near to the shell surface and under the grinding area, *** to evaluate these sub-band feature of the mechanical spectrum of the above channels is a difficult problem. It can help to clarify the ball mill grinding mechanism and the mechanical signal generation mechanism. To solve these problems, this paper proposes a multi-channel mechanical frequency spectrum sub-band feature evaluation method based on multiple types correlation analysis. Firstly, the multi-channel mechanical signals are transformed from time domain to frequency domain to obtain the frequency spectrum data, which are divided into several sub-bands to extract features. Then, the normalized correlation coefficients between the multi-channel sub-band feature and the mill load are calculated. Thirdly, based on the partial least square algorithm, the variable projection importance（VIP） value of sub-band features are also calculated. The VIPs are normalized same as that of correlation coefficient. Finally, a new index is calculated by using normalized correlation coefficient and VIP value and the model’s prediction performance. These sub-band features of single channel and all channel mechanical signals are measured based on the new defined combined evaluation index. The multi-channel mechanical signals of a laboratory-scale ball mill are used to verify the effectiveness of the proposed method.

关键词： Multiple channel mechanical signals mechanical frequency spectrum sub-band features correlation coefficient variable projection importance(VIP)

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用于海洋拖曳系统的吸光度传感器设计与研制

光子学报 2023年第4期52卷 95-105页

作者：薛庆生郝锡杰王福鹏中国海洋大学信息科学与工程学部物理与光电工程学院青岛266100

为实现海水吸光度大范围长时间的测量,设计了适用于海洋拖曳观测系统的原位吸光度传感器。传感器可实现多波段吸光度同步探测,选取LED和光电二极管分别作为光源和探测器,通过多通道并排排列的光机结构布局方式及高集成电路优化等实现传... 详细信息

为实现海水吸光度大范围长时间的测量,设计了适用于海洋拖曳观测系统的原位吸光度传感器。传感器可实现多波段吸光度同步探测,选取LED和光电二极管分别作为光源和探测器,通过多通道并排排列的光机结构布局方式及高集成电路优化等实现传感器的小型化及低功耗设计;使用窄带光学滤光片及数字锁相处理算法实现明场环境下的海水吸光度原位探测。实验证明该吸光度传感器具有高精度、小体积、抗环境干扰能力强、功耗低、稳定等优点,传感器精度优于0.0001 AU。该吸光度传感器可通过设计不同路径长度的吸收池来适应复杂的水域环境,也可在近岸海域搭载船只通过走航式实现连续探测,具有广泛的应用前景。

关键词：吸光度传感器高精度原位探测拖曳观测数字锁相

三苯胺基取代的吡啶基二氟化硼配合物力致荧光变色及无墨书写测试

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高等学校化学学报 2023年第11期44卷 25-31页

作者：王甫鹏田佳壮杨艳华高树林昆明学院化学化工学院云南省金属有机分子材料与器件重点实验室(筹)昆明650214

为了探究二氟化硼配合物的光学性能及实际应用,设计合成了一种以三苯胺为电子供体、二氟化硼为电子受体的D-π-A型二氟化硼配合物4′-(1,1-二氟-1H-1λ^(4), 9λ^(4)-吡啶[1,2-c][1,3,5,2]氧二氮杂硼啉-3-基)-N,N-二苯基-[1,1′-联苯基]... 详细信息

为了探究二氟化硼配合物的光学性能及实际应用,设计合成了一种以三苯胺为电子供体、二氟化硼为电子受体的D-π-A型二氟化硼配合物4′-(1,1-二氟-1H-1λ^(4), 9λ^(4)-吡啶[1,2-c][1,3,5,2]氧二氮杂硼啉-3-基)-N,N-二苯基-[1,1′-联苯基]-4-胺(Py-TPA BF_(2)).光学性能测试结果表明,该配合物具有分子内电荷转移特性和聚集诱导发光活性.进一步的研究结果表明,在外力刺激下,配合物Py-TPA BF_(2)的固体荧光发射光谱从530 nm红移至550 nm,发光颜色由绿色转变为稻草黄色,且在二氯甲烷蒸气熏蒸后颜色恢复至绿色. X射线衍射测试结果表明,研磨和溶剂熏蒸过程可使配合物固体有序的晶相与无序的非晶相之间的相变转换,导致配合物Py-TPA BF_(2)具有可逆的力致荧光变色性能.此外,该配合物还可应用于无墨书写的数据安全保护,这将有助于智能发光材料的合理设计.

关键词：二氟化硼配合物力致荧光变色性能数据安全保护

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论岭南诗派“雄直”诗风的形成

地域文化研究 2020年第3期 43-54,M0004页

作者：王富鹏广州大典研究中心广东广州510623 广州大学广府文化研究中心广东广州510623

岭南诗坛在千年的发展过程中,整体来看偏于"雄直"一路。岭南诗派的"雄直"诗风的形成既与其诗歌传统、诗学好尚有关,也与地域环境和岭南士人的遗民精神有关。连绵的五岭隔阻了岭南与中原的交通,同时也减弱了中原和其他地区的文学对岭南... 详细信息

岭南诗坛在千年的发展过程中,整体来看偏于"雄直"一路。岭南诗派的"雄直"诗风的形成既与其诗歌传统、诗学好尚有关,也与地域环境和岭南士人的遗民精神有关。连绵的五岭隔阻了岭南与中原的交通,同时也减弱了中原和其他地区的文学对岭南文学的影响。岭南远离中原,僻处岭海之间,群山和大海深刻地影响着岭南人的心理,也影响着他们的文学表达。故粤人之诗"不在天下风气之内",能"自抒声情,不与时为俯仰。"自宋元厓山大战,经陈献章对"厓山精神"的倡导,抗志不屈的遗民精神成了岭南士人的一种集体意识。因着岭南遗民精神在明清鼎革之际的这次集体飙发,"雄直"终于成为岭南诗派的主导诗风,而被普遍关注。

关键词：地域诗学传统明清鼎革遗民精神厓山精神