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Quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy

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Light(Science & Applications) 2024年第4期13卷 696-705页

作者： jiapeng wang Hongpeng Wu Angelo Sampaolo Pietro Patimisco Vincenzo Spagnolo Suotang Jia Lei Dong State Key Laboratory of Quantum Optics and Quantum Optics Devices Institute of Laser SpectroscopyShanxi UniversityTaiyuan 030006China. Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China. PolySense Lab Dipartimento Interateneo di FisicaUniversity and Politecnico of BariCNR-IFNVia Amendola 17370126 BariItaly

The extension of dual-comb spectroscopy(DCS)to all wavelengths of light along with its ability to provide ultralarge dynamic range and ultra-high spectral resolution,renders it extremely useful for a diverse array of applications in physics,chemistry,atmospheric science,space science,as well as medical *** this work,we report on an innovative technique of quartz-enhanced multiheterodyne resonant photoacoustic spectroscopy(QEMR-PAS),in which the beat frequency response from a dual comb is frequency down-converted into the audio frequency *** this way,gas molecules act as an optical-acoustic converter through the photoacoustic effect,generating heterodyne sound *** conventional DCS,where the light wave is detected by a wavelengthdependent photoreceiver,QEMR-PAS employs a quartz tuning fork(QTF)as a high-Q sound transducer and works in conjunction with a phase-sensitive detector to extract the resonant sound component from the multiple heterodyne acoustic tones,resulting in a straightforward and low-cost hardware *** novel QEMRPAS technique enables wavelength-independent DCS detection for gas sensing,providing an unprecedented dynamic range of 63 dB,a remarkable spectral resolution of 43 MHz(or~0.3 pm),and a prominent noise equivalent absorption of 5.99×10^(-6)cm^(-1)·Hz-1/2.

关键词： Quartz hardware resonant

RBMDO Using Gaussian Mixture Model-Based Second-Order Mean-Value Saddlepoint Approximation

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Computer Modeling in Engineering & Sciences 2022年第8期132卷 553-568页

作者： Debiao Meng Shiyuan Yang Tao Lin jiapeng wang Hengfei Yang Zhiyuan Lv School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu611731China Failure Mechanics&Engineering Disaster Prevention and Mitigation Key Laboratory of Sichuan ProvinceSichuan UniversityChengdu610065China Yangzhou Yangjie Electronic Technology Co. Ltd.Yangzhou225008China Sichuan Special Equipment Inspection and Research Institute Chengdu610100China Food Safety Inspection Technology Center of Administration for Market Regulation of Sichuan Province Chengdu610017China

Actual engineering systems will be inevitably affected by uncertain ***,the Reliability-Based Multidisciplinary Design Optimization(RBMDO)has become a hotspot for recent research and application in complex engineering system *** Second-Order/First-Order Mean-Value Saddlepoint Approximate(SOMVSA/-FOMVSA)are two popular reliability analysis strategies that are widely used in ***,the SOMVSA method can only be used efficiently when the distribution of input variables is Gaussian distribution,which significantly limits its *** this study,the Gaussian Mixture Model-based Second-Order Mean-Value Saddlepoint Approximation(GMM-SOMVSA)is introduced to tackle above *** is integrated with the Collaborative Optimization(CO)method to solve RBMDO ***,the formula and procedure of RBMDO using GMM-SOMVSA-Based CO(GMM-SOMVSA-CO)are ***,an engineering example is given to show the application of the GMM-SOMVSA-CO method.

关键词： Uncertain factors reliability-based multidisciplinary design optimization saddlepoint approximate gaussian mixture model collaborative optimization

Steroids and dihydroisocoumarin glycosides from Xylaria *** the one strain many compounds strategy and their bioactivities

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Chinese Journal of Natural Medicines 2023年第2期21卷 154-160页

作者： GAN Dong LI Chenzhe SHU Yan wang jiapeng wang Chengyao ZHU Li YANG Yujun LIU Jiaqi HE Bijian CAI Le DING Zhongtao Functional Molecules Analysis and Biotransformation Key Laboratory of Universities in Yunnan Province Key Laboratory of Medicinal Chemistry for Natural ResourceMinistry of EducationSchool of Chemical Science and TechnologyYunnan UniversityKunming 650091China College of Pharmacy Dali UniversityDali 671003China

The fungus Xylaria ***-15 was isolated from Illigera *** on the one strain many compounds(OSMAC)strategy,the strain was fermented on potato and rice solid media,*** a result,two novel steroids,xylarsteroids A(1)and B(2),which are the first examples of C28-steroid with an unusualβ-andγ-lactone ring,respectively,along with two new dihydroisocoumarin glycosides,xylarglycosides A(3)and B(4),were *** structures were elucidated by spectroscopic methods,X-ray diffraction and electronic circular dichroism(ECD)*** isolated compounds were evaluated for cytotoxicity,DPPH radical scavenging activity,acetylcholinesterase inhibitory and antimicrobial *** 1 exhibited potent AChE inhibitory activity with an IC50 value of 2.61±0.05μmol·L^(−1).Theβ-lactone ring unit of 1 is critical for its AChE inhibitory *** finding was further confirmed through exploring the interaction of 1 with AChE by molecular *** addition,both compounds 1 and 2 exhibited obvious antibacterial activity against Bacillus subtilis with a minimum inhibitory concentration(MIC)of 2μg·mL^(−1).Compounds 3 and 4 exhibited antibacterial activities against Staphylococcus aureus with MICs of 4 and 2μg·mL^(−1),respectively,which also exhibited DPPH radical scavenging activity comparable to the positive control with IC50 values of 9.2±0.03 and 13.3±0.01μmol·L^(−1),respectively.

关键词： Xylaria sp. OSMAC strategy Secondary metabolite Bioactivity

知识的起源、碰撞与综合——曼海姆的知识传播思想及其贡献

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国际新闻界 2021年第7期43卷 80-98页

作者：王佳鹏南京大学新闻传播学院

知识社会学与传播研究原本同根相系,但却随着美国传播研究的学科化而分道扬镳,如今又呈现出一种重新融合之势。或许正因同根相系,曼海姆在20世纪初为知识社会学奠基的同时,也对知识社会学与传播研究的融合进行了有益探索。他对传播研究... 详细信息

知识社会学与传播研究原本同根相系,但却随着美国传播研究的学科化而分道扬镳,如今又呈现出一种重新融合之势。或许正因同根相系,曼海姆在20世纪初为知识社会学奠基的同时,也对知识社会学与传播研究的融合进行了有益探索。他对传播研究的贡献,不仅在于提供了知识社会学这个一般分析方法,以及对意识形态和政治传播的论述,还在于开辟了一条知识社会学与传播研究相融合的早期路径。在很大程度上,曼海姆的知识社会学也是一种知识传播学,他以广义的知识为立足点,探讨了"知识"及其偏向性在历史发展中的社会来源、不断扩散、相互碰撞和综合提升这一完整的知识传播过程。其知识传播学虽然相对忽视了媒介的偏向性,但却对知识社会学与传播研究的融合进行了先驱性的探索,为二者在当今的重新融合奠定了基础。

关键词：曼海姆知识传播知识综合知识社会学

从政治嘲讽到生活调侃——从近十年网络流行语看中国青年社会心态变迁

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中国青年研究 2019年第2期 80-86,79页

作者：王佳鹏南京大学新闻传播学院

本文以网络流行语为切入点,通过分析2008—2017年网络流行语的传播方式、传播内容及其变化,透视中国青年的社会心态变迁。研究发现,网络流行语的传播途径和传播范围虽然日益多元而广泛,但其传播内容却逐渐从政治领域、公共问题转向生活... 详细信息

本文以网络流行语为切入点,通过分析2008—2017年网络流行语的传播方式、传播内容及其变化,透视中国青年的社会心态变迁。研究发现,网络流行语的传播途径和传播范围虽然日益多元而广泛,但其传播内容却逐渐从政治领域、公共问题转向生活领域和娱乐问题,反映的社会心态从负能量为主转向正能量为主,从政治嘲讽转向生活调侃。发生这种转变的根本原因在于,青年群体在国家网络治理、主流社会渗透、媒介技术发展等多股势力面前所做出的被动调整或主动适应。

关键词：网络流行语青年群体社会心态

在现代西方思想中发掘“耻感文化”——迈向文化自觉视野下的人文心态比较研究

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江海学刊 2023年第6期 124-134,256页

作者：王佳鹏南京大学新闻传播学院

本尼迪克特对耻感文化与罪感文化的区分虽影响广泛却颇受争议。通过思想史的追溯和发掘可以发现,这对概念在现代西方思想中既有变化也有延续。尤其是从德国精神分析到美国心理人类学,关注重心发生了显著变化:从罪感转向耻感,从西方儿童... 详细信息

本尼迪克特对耻感文化与罪感文化的区分虽影响广泛却颇受争议。通过思想史的追溯和发掘可以发现,这对概念在现代西方思想中既有变化也有延续。尤其是从德国精神分析到美国心理人类学,关注重心发生了显著变化:从罪感转向耻感,从西方儿童的耻感转向非西方社会的耻感文化,从强调耻感向罪感的纵向发展转变为对二者进行横向的跨文化比较。不过,耻感概念的基本意涵在流变中却得到了延续,它始终被视为缺乏自主性和道德性的社会性压力和恐惧。这种耻感意涵在很大程度上是欧美学者从罪感文化出发的文化无意识,相比之下,耻感在中国文化中则是深具道德性和自律性的美德。我们应在文化自觉的视野下比较耻感心态,从中国耻德文化的自觉出发,“化成”一种既“羞己之恶”又“美人之美”的“心态秩序”。

关键词：本尼迪克特弗洛伊德耻感文化文化自觉

从恐惧到羞耻:霍布斯和埃利亚斯的情感思想及其内在关联

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学海 2019年第4期 64-73页

作者：王佳鹏南京大学新闻传播学院

霍布斯论证了从相互恐惧和死亡恐惧的自然状态如何进入到以主权者的至高威慑力为基础的现代政治社会。受到霍布斯影响的埃利亚斯,虽然同样强调恐惧和国家的作用,但却以不同于自然法的过程社会学,论述了欧洲文明的进程,尤其是从中世纪的... 详细信息

霍布斯论证了从相互恐惧和死亡恐惧的自然状态如何进入到以主权者的至高威慑力为基础的现代政治社会。受到霍布斯影响的埃利亚斯,虽然同样强调恐惧和国家的作用,但却以不同于自然法的过程社会学,论述了欧洲文明的进程,尤其是从中世纪的相互恐惧、对君主的恐惧到文明人的自我羞耻这一心理生成过程。他们之间的思想关联表明,现代人的核心感受从此前的外在恐惧转变为内在恐惧或自我羞耻,从"所有人对所有人的战争"转变为"自我内心的冲突"或"自我对自我的斗争",这将促使我们重新反思现代国家的形成和现代社会的建构。

关键词：霍布斯埃利亚斯恐惧羞耻

Uncertainty-based Multidisciplinary Design Optimization using An Approximated Second-Order Reliability Analysis Strategy

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Mechanical Engineering Science 2022年第1期4卷 1-5页

作者： Zhiyuan LYU Hongtao wang Hengfei YANG jiapeng wang Ketema Mikiyas Solomon Debiao MENG School of Mechanical and Electrical Engineering University of Electronic Science and Technology of ChinaChengdu 611731China Institute of Electronic and Information Engineering of UESTC in Guangdong Dongguan 523808China Yangzhou Yangjie Electronic Technology Co. Ltd.Jiangsu Yangzhou 225008China

In uncertainty-based multidisciplinary design optimization(UBMDO),all reliability limitation factors are maintained due to minimize the cost target *** are many reliability evaluation methods for reliability limitation *** second-order reliability method(SORM)is a powerful most possible point(MPP)-based *** can provide an accurate estimation of the failure probability of a highly nonlinear limit state function despite its large *** the Hessian calculation is necessary in SORM,which results in a heavy computational ***,an efficient approximated second-order reliability method(ASORM)is *** ASORM uses a quasi-Newton method to close to Hessian without the direct calculation of *** further improve the UBMDO efficiency,we also introduce the performance measure approach(PMA)and the sequential optimization and reliability assessment(SORA)*** solve the optimization design problem of a turbine blade,the formula of MDO with ASORM under the SORA framework(MDO-ASORM-SORA)is proposed.

关键词： uncertainty reliability analysis optimization design turbine blade

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视觉信息抽取的深度学习方法综述

中国图象图形学报 2023年第8期28卷 2276-2297页

作者：林泽柠汪嘉鹏金连文华南理工大学电子与信息学院广州510640

随着信息交互的日益频繁,大量的文档经数字化处理,以图像的格式保存和传播。实际生活工作中,票据识别理解、卡证识别、自动阅卷和文档匹配等诸多应用场景,都需要从文档图像中获取某一特定类别的文本内容,这一过程即为视觉信息抽取,旨在... 详细信息

随着信息交互的日益频繁,大量的文档经数字化处理,以图像的格式保存和传播。实际生活工作中,票据识别理解、卡证识别、自动阅卷和文档匹配等诸多应用场景,都需要从文档图像中获取某一特定类别的文本内容,这一过程即为视觉信息抽取,旨在对视觉富文档图像中蕴含的指定类别的信息进行挖掘、分析和提取。随着深度学习技术的快速发展,基于该技术提出了诸多性能优异、流程高效的视觉信息抽取算法,在实际业务中得到了大规模应用,有效解决了以往人工操作速度慢、精度低的问题,极大提高了生产效率。本文调研了近年来提出的基于深度学习的信息抽取方法和公开数据集,并进行了整理、分类和总结。首先,介绍视觉信息抽取的研究背景,阐述了该领域的研究难点。其次,根据算法的主要特征,分别介绍隶属于不同类别的主要模型的算法流程和技术发展路线,同时总结它们各自的优缺点和适用场景。随后,介绍了主流公开数据集的内容、特点和一些常用的评价指标,对比了代表性模型方法在常用数据集上的性能。最后,总结了各类方法的特点和局限性,并对视觉信息抽取领域未来面临的挑战和发展趋势进行了探讨。

关键词：视觉信息抽取(VIE) 文档图像分析与理解计算机视觉自然语言处理光学文字识别(OCR) 深度学习综述