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Observations on fluctuations of sound transmission and temperature field from the ASIAEX 2001 South China Sea experiment and inversion of the characterizations of internal tides (waves)

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Progress in Natural Science:Materials International 2004年第9期 49-55+98页

作者： james f.lynch,Timothy f.Duda Woods Hole Oceanographic Institution MA02543 1053 USA Woods Hole Oceanographic Institution MA02543 1053 USA

Two conclusions are obtained by analyzing the fluctuation data of the temperature field and the sound transmission in the South China Sea from ASIAEX 2001 volume interaction experiment. first of all, the peak to peak value of the particle vertical mean displacement due to the internal waves exceeds 40 m. Secondly, the peak to peak value of the sound transmission fluctuations represented by the pulse leading edge fluctuations of the travel time average exceeds 100 ms. Based on that, the major components of the internal waves are obtained by analyzing the spectrum of the temperature field fluctuations. The spectrum structures of the temperature field fluctuations in the across shelf and the along shore directions are compared respectively, and the spectrum structures of the sound transmission in such two different directions are also compared. The multi path signals and the travel time of the pulse are respectively used to capture the information of the sound transmission fluctuations, and their spectrum structures are compared also.

关键词： fluctuations internal waves inversion.

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美国声学学会期刊主编致语中国读者

应用声学 2019年第5期38卷 905-906页

作者： james f.lynch 苏畅刘颖美国声学学会

我是james lynch博士,现任美国声学学会期刊杂志主编。首先,我代表美国声学学会期刊杂志编辑部向大家表示诚挚的问候。目前,美国声学学会的期刊杂志包括《美国声学学报》、《美国声学学报》特别版——《美国声学快报》、《声学会议文集... 详细信息

我是james lynch博士,现任美国声学学会期刊杂志主编。首先,我代表美国声学学会期刊杂志编辑部向大家表示诚挚的问候。目前,美国声学学会的期刊杂志包括《美国声学学报》、《美国声学学报》特别版——《美国声学快报》、《声学会议文集》和《今日声学》。

关键词：声学学会期刊主编美国读者中国期刊杂志 james 编辑部

2001南中国海实验温度场与声传播起伏及内潮(波)特征反演

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自然科学进展 2004年第6期14卷 635-640,F005页

作者：王少强吴立新王慧文张仁和 james f.lynch Timothy f.Duda 中国科学院声学研究所声场声信息国家重点实验室 Woods Hole Oceanographic Institution Woods HoleMA025431053USA

对ASIAEX 2 0 0 1南中国海声场与水体相互作用实验的温度场起伏数据和声传播起伏数据进行了分析 ,结果表明 :(1 )内波引起的质点垂直平均位移的峰峰值超过 4 0m ;(2 )由声脉冲前沿传播时间平均起伏所表征的声传播起伏 ,其峰峰值超过 1 0... 详细信息

对ASIAEX 2 0 0 1南中国海声场与水体相互作用实验的温度场起伏数据和声传播起伏数据进行了分析 ,结果表明 :(1 )内波引起的质点垂直平均位移的峰峰值超过 4 0m ;(2 )由声脉冲前沿传播时间平均起伏所表征的声传播起伏 ,其峰峰值超过 1 0 0ms .在此基础上 ,对温度场起伏数据进行谱分析 ,得到影响海洋起伏的主要内波分量 ;声传播起伏数据经Burg法谱分析反演得到的内波主要周期 ,与温度场的结果一致 .比较了垂直于大陆架方向和平行于大陆架方向的温度场起伏谱结构 ,以及两个方向的声传播起伏谱结构 ;利用脉冲多途结构和脉冲传播时间分别提取声传播起伏信息的参量。

关键词： 2001南中国海温度场声场起伏内波传播反演各向异性

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南中国海内波特征及其引起的声场起伏

自然科学进展 2004年第10期14卷 1163-1170,i005页

作者：陈守虎吴立新张仁和李整林 james f.lynch Timothy f.Duda Arthur E.Newhall 中国科学院声学研究所声场声信息国家重点实验室 Woods Hole Oceanographic Institution Woods HoleMA02543USA

浅海内波场与声场相互作用是ASIAEX 2 0 0 1南中国海实验的主要内容之一 .文中对这次实验所得到的海洋环境和声场数据进行了处理 ,分析了内波的基本特征及其对声传播的影响 .给出了孤子内波的传播速度、方向、幅度等主要特征物理量 .结... 详细信息

浅海内波场与声场相互作用是ASIAEX 2 0 0 1南中国海实验的主要内容之一 .文中对这次实验所得到的海洋环境和声场数据进行了处理 ,分析了内波的基本特征及其对声传播的影响 .给出了孤子内波的传播速度、方向、幅度等主要特征物理量 .结果表明 :该海域存在孤子内波现象 ,幅度最大可达 14 0m .内波受到半日潮、全日潮和子午潮的调制 .内波主要由低阶模态控制 .分析了内波对不同频率、沿不同路径传播的声信号的总能量、峰值能量以及延迟时间的影响 .

关键词：内波南中国海起伏波场海域海洋环境幅度总能量孤子声场

Commentary on“Incidence of urinary incontinence following endoscopic laser enucleation of the prostate by en-bloc and non-en-bloc techniques:a multicenter,real-world experience of 5068 patients”

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Asian Journal of Andrology 2024年第3期26卷 333-334页

作者： james f Jiang Narmina K Onder Akhil K Das Department of Urology University of California Irvine Orange CA 92868 USA.

Laser enucleation of the prostate is a proven and effectivesize-independent method for the surgical management of symptomaticbenign prostatic hyperplasia(BPH)and is considered as the“goldstandard”by many *** major hurdles that stand in theway of this becoming a universally used procedure for BPH are thesteep learning curve associated with mastering the procedure andpossibility of perioperative transient *** advances inteaching methodologies have helped tackle the difficulty in learning itand increased the number of urologists utilizing the *** forthe second hurdle,transient incontinence rates postlaser enucleationof the prostate have improved with the advent of newer techniques *** et al.1 assesses the incidence of stress,urge,andmixed urinary incontinence following laser enucleation of the prostateby comparing en-bloc and non-en-bloc techniques in a multicenterseries of 5068 men with BPH.

关键词： urinary incontinence transient

Time-Aware LSTM Neural Networks for Dynamic Personalized Recommendation on Business Intelligence

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Tsinghua Science and Technology 2024年第1期29卷 185-196页

作者： Xuan Yang james A.Esquivel Graduate School Angeles University FoundationAngeles City 2009Philippines Shandong Provincial University Laboratory for Protected Horticulture Weifang University of Science and TechnologyWeifang 262700China

Personalized recommendation plays a critical role in providing decision-making support for product and service analysis in the field of business ***,deep neural network-based sequential recommendation models gained considerable ***,existing approaches pay litle attention to users'dynamically evolving interests,which are influenced by product attributes,especially product *** overcome these challenges,we propose a dynamic personalized recommendation model:***,we first embed product information and attribute information into a unified data ***,we exploit long short-term memory(LsTM)networks to characterize sequential behavior over multiple time periods and seize evolving interests by hierarchical LSTM ***,similarity values between users are measured through pairwise interest features,and personalized recommendation lists are generated.A series of experiments reveal the superiority of the proposed method compared withotheradvanced methods.

关键词： personalized recommendations evolving interests embedding LsTM networks

Probing turbulence in galaxies with fast radio burst scintillation

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Science China(Physics,Mechanics & Astronomy) 2024年第1期67卷 177-178页

作者： james M.Cordes Department of Astronomy the Cornell Center for Astrophysics and Planetary ScienceCornell UniversityIthaca NY 14853USA

Interstellar scintillation(ISS)is a well-known phenomenon observed from pulsars in the Milky *** comprises intensity variations *** and frequency caused by constructive and destructive interference from multipath propagation,which is due to diffraction from fluctuations in electron density in the interstellar medium(ISM)on scales as small as~100 *** density fluctuations appear to be part of a turbulence process combined with discrete structures in electron density from other astrophysical processes;together these fluctuations extend to scales of pc or larger.

关键词： scales galaxies turbulence

Photonic analog signal processing and neuromorphic computing[Invited]

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Chinese Optics Letters 2024年第3期22卷 123-136页

作者： james Garofolo Ben Wu Department of Electrical and Computer Engineering Rowan UniversityGlassboroNJ 08028USA

In this review paper,we discuss the properties and applications of photonic computing and analog signal *** computational circuits have large operation bandwidth,low power consumption,and fine frequency control,enabling a wide range of application-specific computational techniques that are impossible to implement using traditional electrical and digital hardware *** advantages are illustrated in the elegant implementation of optical steganography,the real-time blind separation of signals in the same bandwidth,and the efficient acceleration of artificial neural network *** working principles and use of photonic circuits for analog signal processing and neuromorphic computing are reviewed and notable demonstrated applications are highlighted.

关键词： blind-source separation optical steganography neuromorphic photonics

Analysis of the Oscillatory flows of Multiple Shock Waves in a Constant Area Duct

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Journal of Thermal Science 2024年第3期33卷 794-806页

作者： K james Jintu KIM Heuy Dong Department of Mechanical Engineering Andong National UniversityAndong36729Republic of Korea CAD-IT Korea Co. Ltd.Seoul08591Republic of Korea

The oscillatory response of multiple shock waves to downstream perturbations in a supersonic flow is studied numerically in a rectangular *** shock waves are formed inside the duct at a shock Mach number of *** duct has an exit height of H,and the effect of duct resonance on multiple shock oscillations is investigated by attaching exit ducts of lengths 0H,50H,and *** downstream disturbance frequency varied from 10 Hz to 200 Hz to explore the oscillation characteristics of the multiple shock *** oscillatory response of shock waves under self-excited and forced oscillation conditions are analyzed in terms of wall static pressure,shock train leading-edge location,shock train length,and the size of the separation *** extent of the initial shock location increases with an increase in exit duct length for the self-excited oscillation *** analysis of the shock train leading edge and the spectral analysis of wall static pressure variations are *** variation in the shock train length is analyzed using the pressure ratio method for self-excited as well as forced *** RMS amplitude of the normalized shock train length(ζ_(ST))increases with an increase in the exit duct length for the self-excited oscillation *** the downstream perturbation frequency is increased,ζ_(ST)is decreased for exit duct *** all exit duct designs and downstream forcing frequencies,the size of the separation bubble grows and shrinks during the shock oscillations,demonstrating the dependence on duct resonance and forced oscillations.

关键词： shock train downstream disturbance supersonic flow shock wave boundary layer interaction duct resonance flow separation