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Uniform local well-posedness and inviscid limit for the Benjamin-Ono-Burgers equation

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Science China Mathematics 2022年第8期65卷 1553-1576页

作者： Mingjuan Chen Boling Guo lijia han Department of Mathematics Jinan UniversityGuangzhou510632China Institute of Applied Physics and Computational Mathematics Beijing100088China Department of Mathematics and Physics North China Electric Power UniversityBeijing102206China

In this paper,we study the Cauchy problem for the Benjamin-Ono-Burgers equation ∂_(t)u−ϵ∂^(2)/_(x)u+H∂^(2)_(x)u+uu_(x)=0,where H denotes the Hilbert transform *** obtain that it is uniformly locally well-posed for small data in the refined Sobolev space H~σ(R)(σ■0),which is a subspace of L2(ℝ).It is worth noting that the low-frequency part of H~σ(R)is scaling critical,and thus the small data is *** high-frequency part of H~σ(R)is equal to the Sobolev space Hσ(ℝ)(σ■0)and reduces to L2(ℝ).Furthermore,we also obtain its inviscid limit behavior in H~σ(R)(σ■0).

关键词： Benjamin-Ono-Burgers equation Cauchy problem inviscid limit behavior

On the limit behavior of the magnetic Zakharov system

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Science China Mathematics 2012年第3期55卷 509-540页

作者： han lijia ZhanG JingJun GAN ZaiHui GUO BoLing Department of Mathematics and Physics North China Electric Power University Beijing 102206 China College of Mathematics Physics and Information Engineering Jiaxing University Jiaxing 314001 China College of Mathematics and Software Science Sichuan Normal University Chengdu 610068 China Institute of Applied Physics and Computational Mathematics Beijing 100088 China

In this paper,we prove that the solutions of magnetic Zakharov system converge to those of generalized Zakharov system in Sobolev space H s,s > 3/2,when parameter β→∞.Further,when parameter (α,β) →∞ together,we prove that the solutions of magnetic Zakharov system converge to those of Schro¨dinger equation with magnetic effect in Sobolev space H s,s > 3/***,the convergence rate is also obtained.

关键词： magnetic Zakharov system Zakharov system Schrodinger equation with magnetic effect Cauchyproblem limit behavior

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基于连续时间商品模型的电力市场定价理论

中国科学：信息科学 2018年第10期48卷 1287-1299页

作者：陈皓勇韩励佳华南理工大学电力学院广州510641 华北电力大学数理学院北京102206

实时电价理论是许多国家电力现货市场设计的理论基础,但有两个重大缺陷:一是仍然基于传统的分时调度模型,忽略了电能生产和消费的时间连续性这个十分重要的特征对电能成本及电力系统调度运行的影响,没有认真处理跨时段约束;二是假设同... 详细信息

实时电价理论是许多国家电力现货市场设计的理论基础,但有两个重大缺陷:一是仍然基于传统的分时调度模型,忽略了电能生产和消费的时间连续性这个十分重要的特征对电能成本及电力系统调度运行的影响,没有认真处理跨时段约束;二是假设同一时段的电能商品都是同质的,无法区别基荷、腰荷和峰荷机组区别明显的技术特征及成本构成.为克服这些缺陷,本文提出连续时间电能商品模型(即功率对于时间的函数),以及该模型下两者不同的定价方式,即实时电价和按负荷持续时间定价.两种定价方式下的市场优化问题也相应地由传统电力市场理论中的数值优化问题变为泛函极值优化模型.本文通过严格的数学推导证明了按负荷持续时间定价的可行性.所提的理论和方法可为国内外电力市场建设提供全新的思路和理论基础.

关键词：电力市场实时电价价格形成机制市场均衡泛函优化

一类广义Camassa-Holm方程的无限传播速度与渐近行为（英文）

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上海师范大学学报（自然科学版） 2018年第3期47卷 290-304页

作者：崔文军韩励佳王端华北电力大学数理学院北京102206 中国核工业集团研究生部北京102413

研究了一类广义的Camassa-Holm方程的Cauchy问题.首先,证明当初始值u_0(x)具有紧支集的情况下,方程的解u(x,t)不再具有紧支集.因此,由u_0(x)表示的具有紧支集的初始扰动的传播速度是无限的.其次,当x趋于无穷时,证明了方程的解u(x,t)具... 详细信息

研究了一类广义的Camassa-Holm方程的Cauchy问题.首先,证明当初始值u_0(x)具有紧支集的情况下,方程的解u(x,t)不再具有紧支集.因此,由u_0(x)表示的具有紧支集的初始扰动的传播速度是无限的.其次,当x趋于无穷时,证明了方程的解u(x,t)具有指数衰减.最后,研究了当初始值为指数或代数衰减时,方程的解在无穷远处的渐近行为.

关键词：广义的Camassa—Holm方程无限速度传播渐近行为

Monitoring and engineering interface coupling between monolayer WS_(2)and substrate through controllably introducing interfacial strain

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Science China Materials 2024年第9期67卷 3012-3020页

作者： Xiaofei Yue Jiajun Chen Jinkun han Yabing Shan Shuwen Shen Wenxuan Wu Bingjie Liu lijia Li Yu Chen Rongjun Zhang Laigui Hu Ran Liu Zhijun Qiu Chunxiao Cong School of Information Science and Technology Fudan UniversityShanghai200433China Commonwealth Scientific and Industrial Research Organization(CSIRO) ClaytonVictoria3168Australia Yiwu Research Institute of Fudan University Yiwu322000China

The interface properties in two-dimensional(2D)layered materials and their van der Waals(vdW)homo-/heterostructures are of importance in both uncovering novel physical phenomena and optimizing device *** considerable research interest and enthusiasm direct toward the interlayer coupling in 2D homo-and heterostructures,there is limited research on the coupling at the 2D layered material-substrate *** limitation is due to the challenges in achieving direct ***,the coupling mechanisms at the 2D layered material-substrate interface is ambiguous,which needs greater *** this study,we have systematically investigated the interface coupling between monolayer WS_(2)and its supported substrates using high-temperature and high-vacuum in-situ Raman spectroscopy through monitoring the low-frequency Raman mode of monolayer WS_(2).Our findings reveal that both interfacial spacing and strain can significantly affect the coupling strength between the monolayer WS_(2)and the supported *** notably,we found that the strategic introduction of appropriate interfacial strain can effectively enhance the interface ***,we have succeeded in achieving effective regulation of the sample-substrate coupling via a convenient way of controlling the cooling process during *** findings contribute to a deeper understanding of the coupling correlation between 2D layered materials and substrates,which is of great significance for the design and optimization of high-performance devices based on 2D layered semiconductors.

关键词： two-dimensional layered material substrate interface coupling low-frequency Raman mode interfacial spacing interfacial strain

智慧校园视域下“小通”APP的功能一体化服务设计

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信息与电脑 2024年第9期36卷 109-111页

作者：韩勇张丽佳徐楠辽宁何氏医学院辽宁沈阳110000

近年,科技飞速发展,为校园信息化管理和服务的转型升级提供了有力支撑,将互联网、大数据、云计算、智能化和个性化等的一系列数字化应用,融入校园各个角落,促成智慧校园。本文在汇总智慧校园知识的前提下,归纳智慧校园的应用,分析并设... 详细信息

近年,科技飞速发展,为校园信息化管理和服务的转型升级提供了有力支撑,将互联网、大数据、云计算、智能化和个性化等的一系列数字化应用,融入校园各个角落,促成智慧校园。本文在汇总智慧校园知识的前提下,归纳智慧校园的应用,分析并设计智慧校园一体化应用APP,期望能为智慧校园应用工作提供有益的借鉴。

关键词：智慧校园一体化 APP

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汽车蓄电池亏电原因分析及解决方案

汽车零部件 2022年第9期 69-73页

作者：徐家海宋和平韩利佳邢会广李延静长兴吉利汽车部件有限公司浙江长兴313100 宁波吉利汽车研究开发有限公司长兴分公司浙江长兴313100 吉利汽车研究院(宁波)有限公司浙江宁波315336

针对市场客户抱怨度较高的汽车蓄电池亏电问题,从研发标定策略、生产制造阶段和售后阶段等汽车全制造流程进行原因分析,并提供具体可行的解决方案,实现了整车蓄电池电量的有效管控。最后经过市场销售车辆近一年的百万产品的不良率统计,... 详细信息

针对市场客户抱怨度较高的汽车蓄电池亏电问题,从研发标定策略、生产制造阶段和售后阶段等汽车全制造流程进行原因分析,并提供具体可行的解决方案,实现了整车蓄电池电量的有效管控。最后经过市场销售车辆近一年的百万产品的不良率统计,解决方案改善效果明显,有效提升了产品质量,降低了客户抱怨度,并可以给行业因蓄电池原因解决售后质量问题提供了一定的参考。

关键词：汽车蓄电池蓄电池亏电售后质量

Magnetotelluric data reveals subduction polarity and reactivation of the Mudanjiang suture zone,Northeast China

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Science China Earth Sciences 2023年第6期66卷 1309-1320页

作者： Zhonghua XIN Hesheng HOU Jiangtao han lijia LIU Cai LIU Tianqi WANG College of Geoexploration Science and Technology Jilin UniversityChangchun 130026China Chinese Academy of Geological Science Beijing 100089China Key Laboratory of Applied Geophysics of Ministry of Natural Resources Changchun 130026China Changbai Mountain Volcano Comprehensive Geophysics Field Science Observation and Research Station of Ministry of Education Changchun 130026China

The Jiamusi and Songnen blocks converged in the easternmost segment of the Central Asian Orogenic Belt as a result of the subduction and subsequent closure of the Mudanjiang oceanic plate during the *** Mudanjiang suture zone was later directly affected by subductions of the Paleo-Pacific plate and Pacific plate and is therefore an ideal place to study the subduction polarity and later transformation of a paleo-suture *** three-dimensional inversion of magnetotelluric data collected along a 160-km-long profile across the Mudanjiang suture zone,we established a resistivity model of the suture zone and adjacent *** results reveal the subduction polarity and subduction trace of the Mudanjiang oceanic plate and provide geoelectrical evidence for reactivation of the Mudanjiang suture zone induced by the(Paleo-)Pacific plate *** suture zone shows a complex conductive *** west-dipping crustal-scale conductor beneath the Songnen-Jiamusi collision zone represents the fossil subduction zone and indicates the westward subduction polarity of the Mudanjiang oceanic ***,the Mudanjiang fault identified by surface geology does not fully represent the deep structure of the Mudanjiang suture *** definition of the suture zone should be extended to the whole conductive region with a lateral extent of~70 *** conductive minerals beneath the arc in front of the subduction zone were exhumated up from deep to the upper ***“chimney”-shaped conductor connected with the mantle represents the intrusive pathways of mantle-derived materials,suggesting that the Mudanjiang suture zone was reactivated by subductions of the Paleo-Pacific plate and Pacific plate,leading to remelting of the cooled and crystallized materials in the ***,subduction of the(Paleo-)Pacific plate destroyed the lithospheric structure of the paleo collision zone in the eastern segment of the Central Asian orogenic belt,and the large-s

关键词： Westward subduction of the Mudanjiang oceanic plate Reactivation of the Mudanjiang suture zone Subduction of the(Paleo-)Pacific plate Magnetotelluric method 3D electrical model

A hollow tubular NiCo layacknered double hydroxide@Ag nanowire structure for high-power-density flexible aqueous Ni//Zn battery

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Journal of Energy Chemistry 2022年第7期31卷 593-603,I0015页

作者： Xiaoyang Xuan Min Qian Likun Pan Ting Lu Yang Gao Lu han lijia Wan Yueping Niu Shangqing Gong School of Physics East China University of Science and TechnologyShanghai 200237China Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China

Flexible aqueous Ni//Zn batteries have attracted much attention as promising candidates for energy storage in the field of flexible ***,the Ni-based cathodes still face the challenges of poor conductivity,confined charge/mass transfer,and *** this work,we designed a hollow tubular structure consisting of a conductive silver nanowire (Ag NW) wrapped by active Ni Co layered double hydroxide (LDH),for enhancing the electrical conductivity,improving the charge/mass transfer kinetics,and facilitating the ion *** optimizing the contents of Ni,Co and Ag NW,the Ni_(4)Co LDH@Ag_(1.5)NW composite shows a maximum specific capacity of 115.83 m Ah g^(-1)at 0.1 A g^(-1)measured in a two-electrode ***,the flexible aqueous Ni//Zn battery assembled by Ni_(4)Co LDH@Ag_(1.5)NW interwoven with multi-walled carbon nanotube cathode and Zn foil anode realizes a high power density of 160μW cm^(-2)at the energy density of 23.14μWh cm^(-2),which is superior compared with those of oxide/hydroxide based devices and even higher than those of many carbon-based supercapacitors,showing its promising potentials for flexible energy storage applications.

关键词： NiCo layered double hydroxide Silver nanowire Hollow tubular morphology Flexible Ni//Zn battery