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Lamellar water induced quantized interlayer spacing of nanochannels walls

Green Energy & Environment 2024年第2期9卷 356-365页

作者： Yue Zhang Chenlu wang chunlei wang Yingyan Zhang Junhua Zhao Ning Wei Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology Jiangnan UniversityWuxi214122China Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas Ministry of EducationNorthwest A&F UniversityYangling712100China Zhangjiang Lab Interdisplinary Research CenterShanghai Advanced Research InstituteChinese Academy of SciencesShanghai201210China Key Laboratory of Interfacial Physics and Technology Shanghai Institute of Applied PhysicsChinese Academy of SciencesShanghai201800China Mechanical&Automotive Engineering School of EngineeringRMIT UniversityBundooraMelbourneVICVIC 3083Australia

The nanoscale confinement is of great important for the industrial applications of molecular sieve,desalination,and also essential in bio-logical transport *** efforts have been devoted to the influence of restricted spaces on the properties of confined ***,the situation of channel-wall is crucial but attracts less attention and remains *** fundamentally understand the mechanism of channel-walls in nanoconfinement,we investigated the interaction between the counter-force of the liquid and interlamellar spacing of nanochannel walls by considering the effect of both spatial confinement and surface *** results reveal that the nanochannel stables at only a few discrete spacing states when its confinement is within 1.4 *** quantized interlayer spacing is attributed to water molecules becoming laminated structures,and the stable states are corresponding to the monolayer,bilayer and trilayer water configurations,*** results can potentially help to understand the characterized interlayers spacing of graphene oxide membrane in *** findings are hold great promise in design of ion filtration membrane and artificial water/ion channels.

关键词： Nanoconfinement Quantized spacing Lamellar water layer MD simulations Entropy force

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Design of artificial biomimetic channels with Na^(+)permeation rate and selectivity potentially outperforming the natural sodium channel

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Nano Research 2024年第9期17卷 8638-8646页

作者： Zhi Zhu Yan Zhao Chao Chang Shaojian Yan Tingyu Sun Shiyu Gu Yangmei Li Dengsong Zhang chunlei wang Xiao Cheng Zeng School of Optical-Electrical and Computer Engineering University of Shanghai for Science and TechnologyShanghai 200093China Innovation Laboratory of Terahertz Biophysics National Innovation Institute of Defense TechnologyBeijing 100071China School of Physics Peking UniversityBeijing 100871China International Joint Laboratory of Catalytic Chemistry College of SciencesShanghai UniversityShanghai 200444China Department of Materials Science and Engineering City University of Hong KongHong Kong 999077China

Artificial ion channels that enable high-efficiency ion transport have important implications in nanofluidics and biomedical applications such as drug ***,we show a simulation-based chemical design of a biomimetic sodium channel that possesses permeation rate and selectivity potentially higher than those of the state-of-the-art natural vertebrate voltage-gated sodium ***,our theoretical findings have undergone empirical testing,aligning well with the Arrhenius law as derived from a diverse range of experimental *** high-efficiency ion transport is achieved by anchoring the carboxylate functional groups within the channel filter.A key chemical guiding principle underlying the ion channel design is that the free-energy barrier for the Na^(+)passage across the channel should be comparable to typical thermal energy at room *** the implementation of the chemical design,we found that the relatively low free-energy barrier can be attributed to the compensation effect of the carboxylate groups to the partially lost oxygen shell of the ion within the ion channel,as well as to the consonant vibration of the ions inside and outside the *** mechanistic understanding brings new insight,at the molecular level,into the high-efficiency ion transport across the designed membrane *** proof of principle achieved from the simulations will stimulate future experimental confirmation and potential applications of the high-performance artificial channels in nanofluidics and in bioinspired iontronics.

关键词： sodium channels anchoring carboxylate functional groups molecular dynamics simulations low free-energy barrier for ion passage thermal kinetic energy

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m^(6)A reader YTHDF1 promotes cardiac fibrosis by enhancing AXL translation

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Frontiers of Medicine 2024年第3期18卷 499-515页

作者： Han Wu Weitao Jiang Ping Pang Wei Si Xue Kong Xinyue Zhang Yuting Xiong chunlei wang Feng Zhang Jinglun Song Yang Yang Linghua Zeng Kuiwu Liu Yingqiong Jia Zhuo wang Jiaming Ju Hongtao Diao Yu Bian Baofeng Yang Department of Pharmacology(National Key Laboratory of Frigid Zone Cardiovascular Diseases the State-Province Key Laboratories of Biomedicine-Pharmaceutics of ChinaKey Laboratory of Cardiovascular ResearchMinistry of Education)College of PharmacyHarbin Medical UniversityHarbin150081China

Cardiac fibrosis caused by ventricular remodeling and dysfunction such as post-myocardial infarction(MI)can lead to heart *** N6-methyladenosine(m^(6)A)methylation has been shown to play a pivotal role in the occurrence and development of many *** investigating the biological function of the m^(6)A reader YTHDF1 in cardiac fibrosis,adeno-associated virus 9 was used to knock down or overexpress the YTHDF1 gene in mouse hearts,and MI surgery in vivo and transforming growth factor-β(TGF-β)-activated cardiac fibroblasts in vitro were performed to establish fibrosis *** results demonstrated that silencing YTHDF1 in mouse hearts can significantly restore impaired cardiac function and attenuate myocardial fibrosis,whereas YTHDF1 overexpression could further enhance cardiac dysfunction and aggravate the occurrence of ventricular pathological remodeling and fibrotic ***,zinc finger BED-type containing 6 mediated the transcriptional function of the YTHDF1 gene ***1 augmented AXL translation and activated the TGF-β-Smad2/3 signaling pathway,thereby aggravating the occurrence and development of cardiac dysfunction and myocardial ***,our data indicated that YTHDF1 was involved in activation,proliferation,and migration to participate in cardiac fibrosis in *** results revealed that YTHDF1 could serve as a potential therapeutic target for myocardial fibrosis.

关键词： cardiac fibrosis YTHDF1 AXL ZBED6 heart failure

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学术主体性视角下的不当借鉴现象分析

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社会科学 2024年第5期 181-192页

作者：王春磊中国人民大学书报资料中心

在建构中国自主的知识体系的过程中,如何处理好中国自主和对外借鉴的关系,知易行难。在时代转折阶段,不妨先“破”后“立”,梳理当前学术研究中存在哪些不当借鉴现象,从而探索正确的借鉴方式。观察发现,研究中的不当借鉴主要表现为学科... 详细信息

在建构中国自主的知识体系的过程中,如何处理好中国自主和对外借鉴的关系,知易行难。在时代转折阶段,不妨先“破”后“立”,梳理当前学术研究中存在哪些不当借鉴现象,从而探索正确的借鉴方式。观察发现,研究中的不当借鉴主要表现为学科语言和理论没有经过内化吸收再转化,缺乏中国化过程,典型如翻译式概念、翻译式话语,以及单纯以工具式思维进行借鉴。以期待可能性、街头官僚和地方官员晋升锦标赛三个代表性理论概念为例,经过语用学分析、发生学考察和效用评估,可以发现不当借鉴对中国特色哲学社会科学学科体系、学术体系、话语体系建设的不良影响和潜在风险。学术研究中的不当借鉴是我国社会科学学科学术体系建立的历史副产品,但也不乏推崇学科专业化思维的影响,更直接的原因是治学方式的偏差。建构中国自主的知识体系应对此有所警醒和纠正。

关键词：中国自主的知识体系学术主体性不当借鉴话语体系治学

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Multi-objective global optimization approach predicted quasi-layered ternary TiOS crystals with promising photocatalytic properties

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Chinese Physics B 2024年第8期33卷 447-454页

作者：向依婕高思妍王春雷方海平段香梅郑益峰张越宇 Shanghai Institute of Applied Physics Chinese Academy of Sciences University of Chinese Academy of Sciences School of Materials Science and Engineering East China University of Science and Technology College of Science Shanghai University School of Physics East China University of Science and Technology School of Physical Science and Technology Ningbo University Wenzhou Institute University of Chinese Academy of Sciences (UCAS)

Titanium dioxide（TiO2） has attracted considerable research attentions for its promising applications in solar cells and photocatalytic ***,the intrinsic challenge lies in the relatively low energy conversion efficiency of TiO2,primarily attributed to the substantial band gaps（exceeding 3.0 eV） associated with its rutile and anatase *** multi-objective global optimization,we have identified two quasi-layered ternary Ti-O-S crystals,composed of titanium,oxygen,and *** calculations of formation energy,phonon dispersions,and thermal stability confirm the chemical,dynamical and thermal stability of these newly discovered *** the state-of-art hybrid density functional approach and many-body perturbation theory（quasiparticle GW approach and Bethe-Salpeter equation）,we calculate the optical properties of both the TiOS ***,both phases show favorable photocatalytic characteristics,featuring band gaps suitable for visible optical absorption and appropriate band alignments with water for effective charge carrier ***,ternary compound TiOS holds the potential for achieving high-efficiency photochemical conversion,showing our multi-objective global optimization provides a new approach for novel environmental and energy materials design with multicomponent compounds.

关键词： first principles calculations multi-objective global optimization photocatalysis

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The involvement of brassinolides in fruit ripening:crosstalk with plant growth regulators and transcription factors

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Food Quality and Safety 2024年第1期8卷 41-49页

作者： Ailing Li Xuetong Wu Yi Huang Xuejuan Pan KangdingYao Zhiya Liu chunleiwang Weibiao Liao College of Horticulture Gansu Agricultural UniversityLanzhouChina

Brassinolides(BRs)are a kind of endogenous plant hormone that play an important role in regulating fruit *** can regulate the process of fruit ripening by interacting with plant growth regulators and transcription *** this review,we discuss recent research advances on the role of BRs in fruit ripening and its relation to plant growth regulators and transcription *** addition,BR signaling molecules that are involved in fruit ripening and ripening-related genes are also *** review provides a better theoretical basis for improving fruit quality and regulating fruit ripening to speed up market availability,and for studying the mechanisms of BRs in fruit ripening.

关键词： Fruit quality ethylene abscisic acid nitric oxide brassinazole-resistant 1.

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国产动漫电影IP版权的生态圈重塑

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电影评介 2024年第9期 106-112页

作者：栗江豪王春蕾河南大学新闻与传播学院开封文化艺术职业学院

近年来,动漫电影IP版权生态复杂,国产动漫电影IP版权的生态多样性与价值高效性加速了资本市场的无序竞争。其中公共版权的无门槛、私人版权的重收益以及版权意识的碎片化导致国产动漫电影IP受困于机制乏力、创作乏味、内容单调。长此以... 详细信息

近年来,动漫电影IP版权生态复杂,国产动漫电影IP版权的生态多样性与价值高效性加速了资本市场的无序竞争。其中公共版权的无门槛、私人版权的重收益以及版权意识的碎片化导致国产动漫电影IP受困于机制乏力、创作乏味、内容单调。长此以往将会阻碍我国动漫电影相关产业的发展。本文通过探析国外动漫电影IP运营机制,针对当下国产动漫电影IP所聚焦的版权问题,提出构建稳定生态圈、打造多元世界观、制定明确“身份卡”的方式,探索构建维系国产动漫电影IP版权的和谐“生态圈”,力图为当下国产动漫电影产业发展提供模式化的价值参考,为国产动漫电影国际化传播打开新思路。

关键词：国产动漫电影 IP版权生态圈重塑

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基于快时间keystone变换和FrFT的无人机检测算法

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现代雷达 2024年第7期46卷 45-51页

作者：王春蕾周传睿南京电子技术研究所江苏南京210039

连续波雷达通常采用长时间相参累积技术来增强对无人机的探测能力。然而,无人机具有高机动性,在做长时间相参积累时易发生距离徙动和多普勒频率徙动,导致雷达检测性能衰退。针对此问题,文中提出了一种基于快时间keystone变换和分数阶傅... 详细信息

连续波雷达通常采用长时间相参累积技术来增强对无人机的探测能力。然而,无人机具有高机动性,在做长时间相参积累时易发生距离徙动和多普勒频率徙动,导致雷达检测性能衰退。针对此问题,文中提出了一种基于快时间keystone变换和分数阶傅里叶变换(FrFT)的连续波雷达无人机检测算法,通过快时间keystone变换校正距离徙动,采用FrFT补偿多普勒频率徙动,进而完成相参积累和检测。不同于传统keystone变换作用于快时间域,快时间keystone变换作用于距离频率域,这是连续波雷达信号模型的特性导致的。仿真分析显示,文中算法可良好地平衡检测性能和计算量之间的矛盾;并采用雷达实测数据验证了所提算法的有效性。

关键词：连续波雷达无人机探测距离徙动多普勒频率徙动快时间keystone变换分数阶傅里叶变换

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-30至50℃车辆工况下CO_(2)喷射器的适应性研究

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汽车工程 2024年第4期46卷 682-690页

作者：杨天阳邹慧明周晖王春磊田长青中国科学院理化技术研究所空间功热转换技术重点实验室北京100190 中国科学院大学北京100049 上海加冷松芝汽车空调股份有限公司上海201108

为推动喷射器回收膨胀功技术的实车应用,本文开展了-30~50℃宽温区运行工况下车用压缩-引射式CO_(2)热泵系统制冷制热性能及喷射器膨胀功回收特性研究,重点分析了工作喷嘴对固定尺寸喷射器变工况适应性的影响。结果表明:制冷工况下随着... 详细信息

为推动喷射器回收膨胀功技术的实车应用,本文开展了-30~50℃宽温区运行工况下车用压缩-引射式CO_(2)热泵系统制冷制热性能及喷射器膨胀功回收特性研究,重点分析了工作喷嘴对固定尺寸喷射器变工况适应性的影响。结果表明:制冷工况下随着环境温度升高,喷射系数递减,而升压比递增;制热工况下随着环境温度降低,喷射系数和升压比均先增大后减小;制冷工况下喷射器回收膨胀功占最大可回收膨胀功的16.7%~37.2%,制热工况下为9.9%~41.3%;以高温制冷工况设计的固定尺寸喷射器难以适应低温制热工况,偏离设计工况时,喷嘴出口过膨胀会造成激波能量损失,而低温制热工况下喷嘴出口因欠膨胀会导致喷射器无引射效果。

关键词：电动汽车喷射器 CO_(2) 适应性热泵系统

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直升机中减三相流金属屑末可达性

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航空学报 2024年第1期45卷 174-187页

作者：陆凤霞韦坤王春雷鲍和云朱如鹏南京航空航天大学直升机传动技术重点实验室南京210016 中国航发湖南动力机械研究所株洲412002

直升机中间减速器(简称“中减”)在飞溅润滑下运转,轴承会因润滑不充分或磨损产生金属屑末,若油池底部的金属屑末信号器无法及时吸附报警则会导致直升机出现故障。为此,基于CFD理论,应用Fluent18.2软件建立中减固-液-气三相流模型,应用R... 详细信息

直升机中间减速器(简称“中减”)在飞溅润滑下运转,轴承会因润滑不充分或磨损产生金属屑末,若油池底部的金属屑末信号器无法及时吸附报警则会导致直升机出现故障。为此,基于CFD理论,应用Fluent18.2软件建立中减固-液-气三相流模型,应用RNG k-ε湍流模型及动网格技术,基于欧拉-拉格朗日耦合计算方法,采用VOF-DPM耦合模型仿真计算并分析金属屑末的可达性程度,且与试验获得了良好的一致性。结果表明,金属屑末在刚射入机匣内部时以其自身的运动状态为主导,在齿轮将润滑油完全搅动后以齿轮的运动状态为主导,并且运动的随机性与无序性极大,碰到机匣壁面反弹后会发生轨迹突变;所有金属屑末在机匣内均围绕齿轮有离心运动的趋势,且金属屑末的平均速度与距齿轮的距离呈非线性负相关;金属屑末在机匣内的可达性较弱,会在导油管的凹槽与回油孔口沉积,导致直升机无法达到实时报警监测,需对金属屑末易沉积的机匣结构进行改进。

关键词：中减计算流体力学金属屑末三相流可达性

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