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Experimental and numerical investigation on the uniformity of nanosecond pulsed dielectric barrier discharge influenced by pulse parameters

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Plasma Science and Technology 2023年第11期25卷 31-41页

作者：张东璇余俊贤李梦遥潘杰刘峰方志 College of Electrical Engineering and Control Science Nanjing Tech UniversityNanjing 211816People’s Republic of China School of Electric Power South China University of TechnologyGuangzhou 510641People’s Republic of China School of Physics and Electronics Shandong Normal UniversityJinan 250014People’s Republic of China

Nanosecond(ns)pulsed dielectric barrier discharge(DBD)is considered as a promising method to produce controllable large-volume and high activity low-temperature plasma at atmospheric pressure,which makes it suitable for wide *** this work,the ns pulse power supply is used to excite Ar DBD and the influences of the pulse parameters(voltage amplitude,pulse width,pulse rise and fall times)on the DBD uniformity are *** gas gap voltage(Ug)and conduct current(Ig)are separated from the measured voltage and current waveforms to analyze the influence of electrical *** spectral line intensity ratio of two Ar excited species is used as an indicator of the electron temperature(Te).The time resolved discharge processes are recorded by an intensified charge-coupled device camera and a one-dimensional fluid model is employed to simulate the spatial and temporal distributions of electrons,ions,metastable argon atoms and *** the experimental and numerical results,the mechanism of the pulse parameters influencing on the discharge uniformity is *** is shown that the space electric field intensity and the space particles'densities are mainly responsible for the variation of discharge *** the increase of voltage and pulse width,the electric field intensity and the density of space particles increased,which results in the discharge mode transition from non-uniform to uniform,and then ***,the extension of pulse rise and fall times leads to the discharge transition from uniform to *** results are helpful to reveal the mechanism of ns pulsed DBD mode transition and to realize controllable and uniform plasma sources at atmospheric pressure.

关键词： nanosecond pulse dielectric barrier discharge electrical characteristics active particle uniformity

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执行转破产程序中档案处置的困境与完善路径

档案学研究 2024年第6期 60-68页

作者：李梦瑶华南理工大学法学院广州510000

目前执行转破产程序中的档案处置工作尚存在无据可依,档案信息收集受制于债权人等利害关系人不配合,多方差异化主体间档案移交的难度较大和信息共享平台的建设缓慢等现实困境,使得档案的处置工作滞后于其他的制度推进工作。对此,应当从... 详细信息

目前执行转破产程序中的档案处置工作尚存在无据可依,档案信息收集受制于债权人等利害关系人不配合,多方差异化主体间档案移交的难度较大和信息共享平台的建设缓慢等现实困境,使得档案的处置工作滞后于其他的制度推进工作。对此,应当从执行转破产程序本身出发,剖析程序衔接中档案处置工作的特殊属性,以及基于这些特殊属性产生的制度不适配问题。从宏观视角上,提炼出执行转破产程序中档案处置需要遵循的概括性指导原则;从微观视角上,按照“三化一消”的策略,即以标准化、法制化、参与主体多样化三个维度具体诠释档案处置工作的完善规则,以消解档案处置的信息区隔问题为导向,将打通执行与破产间的数据库与构建全国统一的执行转破产案件档案数据库作为破除信息壁垒的合力,最终以高质量的档案处置工作回应执行转破产程序对档案资料的现实需求。

关键词：执行转破产程序衔接档案处置档案移交

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面向乐龄读者的公共图书馆阅读疗愈服务探析

图书馆杂志 2024年第4期43卷 37-42页

作者：李梦瑶南京大学信息管理学院江苏南京210023

公共图书馆作为我国公共文化服务体系的重要组成部分,开展面向乐龄读者的阅读疗愈服务,能够有效帮助乐龄读者缓解焦虑、孤寂等不良情绪,帮助乐龄读者走出心灵困境。通过分析阅读疗法的研究现状,总结公共图书馆开展面向乐龄读者的阅读疗... 详细信息

公共图书馆作为我国公共文化服务体系的重要组成部分,开展面向乐龄读者的阅读疗愈服务,能够有效帮助乐龄读者缓解焦虑、孤寂等不良情绪,帮助乐龄读者走出心灵困境。通过分析阅读疗法的研究现状,总结公共图书馆开展面向乐龄读者的阅读疗愈服务的重要意义,并提出公共图书馆开展面向乐龄读者的阅读疗愈服务的4种途径,对阅读疗愈服务在公共图书馆的发展前景作出了初步展望。

关键词：公共图书馆乐龄阅读疗愈

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基于短期室内试验推导长期稳态蠕变率的盐岩本构模型

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工程科学与技术 2018年第5期50卷 138-144页

作者：李梦瑶苟杨侯正猛四川大学建筑与环境学院四川成都610065 德国克劳斯塔尔工业大学石油天然气工程研究所克劳斯塔尔38678 德国下萨克森州能源研究中心哥斯拉尔38640

由于试验时间的限制,短期室内试验测得的稳态蠕变速率往往为现场实测的5～50倍,故如何通过持续时间较短的蠕变试验结果推求出盐岩长期稳态蠕变率是盐岩蠕变特性研究中的一大难点。基于盐岩蠕变特性的现有理论研究,提出利用新的本构模型... 详细信息

由于试验时间的限制,短期室内试验测得的稳态蠕变速率往往为现场实测的5～50倍,故如何通过持续时间较短的蠕变试验结果推求出盐岩长期稳态蠕变率是盐岩蠕变特性研究中的一大难点。基于盐岩蠕变特性的现有理论研究,提出利用新的本构模型解决上述难题。结合典型盐岩蠕变本构模型Lubby2和IfG-G&S的优点,提出能够描述盐岩从一期自动进入二期蠕变全过程,且能够进一步发展为考虑蠕变损伤和失稳的Lubby2_Ⅰ-Ⅱ模型。基于江苏金坛盐岩的试验数据,求得3个蠕变本构模型的参数,并用以计算盐样的稳态蠕变率和金坛储气库的变形量。结果表明:Lubby2_Ⅰ-Ⅱ模型不仅能够较好地描述盐样的实测蠕变曲线,且与金坛储气库二期稳态蠕变率的反演现场值接近。这一结果很好地验证了Lubby2_Ⅰ-Ⅱ模型基于短期室内试验推导现场条件下的盐岩长期稳态蠕变率的可靠性。

关键词：盐岩蠕变本构模型稳态蠕变率 Lubby2 IfG-G&S Lubby2_Ⅰ-Ⅱ模型

Comparative metabolomics provides novel insights into the basis of petiole color differences in celery(Apium graveolens L.)

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2022年第4期23卷 300-314页

作者： mengyao li Jie li Haohan TAN Ya LUO Yong ZHANG Qing CHEN Yan WANG Yuanxiu liN Yunting ZHANG Xiaorong WANG Haoru TANG College of Horticulture Sichuan Agricultural UniversityChengdu 611130China Institute of Pomology and Olericulture Sichuan Agricultural UniversityChengdu 611130China

Plant metabolites are important for plant development and human *** of celery(Apium graveolens L.)with different-colored petioles have been formed in the course of long-term ***,the composition,content distribution,and mechanisms of accumulation of metabolites in different-colored petioles remain *** ultra-high performance liquid chromatography-tandem mass spectrometry(UHPLC-MS/MS),1159 metabolites,including 100 lipids,72 organic acids and derivatives,83 phenylpropanoids and polyketides,and several alkaloids and terpenoids,were quantified in four celery cultivars,each with a different petiole *** were significant differences in the types and contents of metabolites in celery with different-colored petioles,with the most striking difference between green celery and purple celery,followed by white celery and green *** analysis of metabolic pathways showed that the metabolites of the different-colored petioles were significantly enriched in biosynthetic pathways such as anthocyanin,flavonoid,and chlorophyll pathways,suggesting that these metabolic pathways may play a key role in determining petiole color in *** content of chlorophyll in green celery was significantly higher than that in other celery cultivars,yellow celery was rich in carotenoids,and the content of anthocyanin in purple celery was significantly higher than that in the other celery *** color of the celery petioles was significantly correlated with the content of related *** the four celery cultivars,the metabolites of the anthocyanin biosynthesis pathway were enriched in purple *** results of quantitative real-time polymerase chain reaction(q RT-PCR)suggested that the differential expression of the chalcone synthase(CHS)gene in the anthocyanin biosynthesis pathway might affect the biosynthesis of anthocyanin in *** addition,HPLC analysis revealed that cyanidin is the main pigment in purple *** stud

关键词： Celery Metabolite Anthocyanin Chlorophyll Petiole color

Optimal design of resonant enhanced quantum dot photodetector based on metal-insulator-metal microcavity

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Optimal design of resonant enhanced quantum dot photodetecto...

结合分子对接技术研究牦牛乳干酪苦味肽RK7和KQ7的α-淀粉酶抑制活性

国防光电子论坛第二届新型探测技术及其应用研讨会

作者： Han Wang Youliang Jing mengyao li Honglou Zhen State Key Laboratory of Infrared Physics Shanghai Institute of Technical Physics Chinese Academy of Sciences

The design of quantum dot infrared photodetector(QDIP) based on mater-insulator-meter(MIM) microcavity in which the quantum dot(QD) is sandwiched between a planar metallic film and a metallic stripe is reported. By a finite difference time-domain method, the light coupling efficiency spectra and enhancement fator are numerically calculated. The results exhibit that the total electric field concentrated in metal-metal region is strongly enhanced when the resonant frequency of microcavity is equal to the QD’s peak response frequency. This enhancement effect mainly origines from the resonant coupling of incident photons into microcavity forming the surface plasmon mode. The optimization of structural parameters for MIM microcavity is discussed, which demonstrates an optimal structure of quantum dot infrared photodetector with the coupling efficiency improved nearly 7 times compared with conventional mesa QDIPs. So, it is deduced that a favorable performance of device such as high quantum efficiency and infared responsivity is possible. Finally, the detector shows the potential application in the infrared sensing and imaging, as well as integrating with other electronic and optoelectronic device for the sub-wavelength size.

关键词： Quantum Dot Infrared Photodetector Metal-insulator-metal Microcavity Resonant Enhancement Surface Plasmon Coupling Efficiency

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食品科学 2023年第2期44卷 132-138页

作者：李梦瑶梁琪宋雪梅甘肃农业大学食品科学与工程学院甘肃兰州730070 甘肃省功能乳品工程实验室甘肃兰州730070

以牦牛乳干酪苦味肽RPKHPIK(RK7)和KVLPVPQ(KQ7)为研究对象,通过生物信息学方法,使用ExPASy-ProtParam、Innovagen和PepDraw等工具计算RK7和KQ7的理化性质,利用分子对接技术揭示抑制α-淀粉酶的作用机制,结合体外实验测定α-淀粉酶抑制... 详细信息

以牦牛乳干酪苦味肽RPKHPIK(RK7)和KVLPVPQ(KQ7)为研究对象,通过生物信息学方法,使用ExPASy-ProtParam、Innovagen和PepDraw等工具计算RK7和KQ7的理化性质,利用分子对接技术揭示抑制α-淀粉酶的作用机制,结合体外实验测定α-淀粉酶抑制活性。研究表明:RK7和KQ7的分子质量分别为875.07 Da和779.98 Da,疏水性分别为42.86%和71.42%;分子对接显示α-淀粉酶中的His305、Glu233、Trp59和Trp58与RK7和KQ7的结合起重要作用,并且Asp197、Glu233和Asp300是影响α-淀粉酶活性的关键氨基酸;体外活性验证发现,RK7和KQ7α-淀粉酶的IC50分别为0.45 mg/mL和0.86 mg/mL。本研究通过生物信息学方法结合体外活性实验,高效快速获得牦牛乳源α-淀粉酶抑制肽,并通过分子对接技术探究分子间的作用机制,为α-淀粉酶抑制肽的研究提供新思路。

关键词：牦牛乳干酪苦味肽 α-淀粉酶抑制活性分子对接作用机制

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财政转移支付的减贫效应研究——基于国定扶贫县的实证分析

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财经研究 2020年第10期46卷 48-63页

作者：李丹李梦瑶南京审计大学经济学院江苏南京211815

文章以国家扶贫开发重点县为研究对象,构建多维指标体系,系统研究财政净转移支付及各类财政转移支付对贫困地区的减贫效应。研究发现:(1)财政转移对贫困人口和贫困发生率影响较为显著,并能有效提升贫困地区的人均GDP、人均财政收入和农... 详细信息

文章以国家扶贫开发重点县为研究对象,构建多维指标体系,系统研究财政净转移支付及各类财政转移支付对贫困地区的减贫效应。研究发现:(1)财政转移对贫困人口和贫困发生率影响较为显著,并能有效提升贫困地区的人均GDP、人均财政收入和农村人均用电量等绝对指标;(2)财政转移支付未能显著提升贫困地区的人均GDP占比、人均财政收入占比和农村人均用电量占比等相对指标,且与全国平均水平相比,贫困地区不升反降,说明相对贫困问题依然较为突出;(3)分类转移支付中,税收返还、一般性转移支付以及专项转移支付的减贫效果均较为明显,且专项转移支付的减贫效果要优于一般性转移支付。根据上述研究结论,政府应将财政转移支付与“精准扶贫”体系相结合,引导财政转移支付资金向贫困人口、贫困项目倾斜,进一步提升财政转移支付的减贫效应;对贫困地区既要解决“绝对贫困”,也要解决“相对贫困”;既要注重“输血”,更要注重“造血”;同时,加大财政专项转移支付比重,以准确实现上级政府的减贫目标。

关键词：财政转移支付国定扶贫县减贫效应

Study of Strategic Management Oriented Enterprise Internal Control

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Asian Agricultural Research 2023年第4期15卷 5-9页

作者： Hang JI Junxiao WANG Fei YAN mengyao li Shuaidi DU Wentai BI College of Economics and Management Henan Agricultural University Zhengzhou 450046China

Strategic management oriented enterprise internal control is an inevitable choice after the enterprise develops to a certain scale,and it is also an important starting point for enterprises to adjust their own strategic layout and resource *** the continuous expansion of the scope of internal control supervision,the traditional mode of internal control supervision has become more and more *** view of this,the present study started from the necessity of internal control supervision from the overall and top-level perspectives,and analyzed the current problems in the internal control of enterprises from the perspective of strategic *** problems include the lack of methods and tools of strategic management,insufficient awareness of strategic risk management,insufficient expansion of internal control objects,insufficient prior intervention in internal control supervision,***,it came up with the idea of constructing strategic enterprise internal control,in order to provide an effective reference for the study of enterprise internal control.

关键词： Internal control Strategic management Enterprise governance Risk management