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Tortuosity regulation of two-dimensional nanofluidic films for water evaporation-induced electricity generation

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Nano Research 2024年第7期17卷 6192-6202页

作者： Zhihang Liu Chao Liu Anqi Ni Kunpeng Mao Long Chen Liang Xue jingwen sun Xin Wang Pan Xiong Junwu Zhu Key Laboratory for Soft Chemistry and Functional Materials of Ministry Education School of Chemistry and Chemical EngineeringNanjing University of Science and TechnologyNanjing 210094China

Water evaporation-induced electricity generation is a promising technology for renewable energy ***,the output power of some reported two-dimensional(2D)nanofluidic films is still restricted by the relatively weak water–solid interactions within the tortuous *** further enhance the comprehension and utilization of water–solid interactions,it is of utmost importance to conduct an in-depth investigation and propose a regulatory concept encompassing ion ***,we propose tortuosity regulation of 2D nanofluidic titanium oxide(Ti_(0.8)7O_(2))films to optimize the ion transport within the interlayer nanochannel for enhanced efficiency in water evaporation-induced electricity generation for the first *** significance of tortuosity in ion transport is elucidated by designing three 2D nanofluidic films with different *** analysis and in situ Raman measurement demonstrate that low tortuosity can facilitate the formation of efficient pathways for hydrated proton transport and promote water–solid ***,devices fabricated with the optimized 2D nanofluidic films exhibited a significantly enhanced output power density of approximately 204.01μW·cm^(−2),far exceeding those prepared by the high-tortuosity 2D nanofluidic *** work highlights the significance of the construction of low tortuosity channels for 2D nanofluidic films with excellent performance.

关键词： water evaporation-induced electricity generation tortuosity ion transport two-dimensional nanofluidic films

Multiscale confinement nitridation in molybdenum carbide for efficient hydrogen production

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Journal of Energy Chemistry 2024年第7期94卷 61-69页

作者： Liming Dai Chenchen Fang Xiaoyuan Zhang Xuefeng Xu Xuanxuan Chen Xinyue Zong Xueming Hu Wenyao Zhang Liang Xue Pan Xiong Yongsheng Fu jingwen sun Junwu Zhu Key Laboratory for Soft Chemistry and Functional Materials Ministry of EducationNanjing University of Science and TechnologyNanjing 210094JiangsuChina

The molybdenum carbide(Mo_(2)C)has been regarded as one of the most cost-efficient and stable electrocatalyst for the hydrogen evolution reaction(HER)by the virtue of its Pt-like electronic ***,the inherent limitation of high density of empty valence band significantly reduces its catalytic reactivity by reason of strong hydrogen desorption ***,we propose a multiscale confinement synthesis method to design the nitrogen-rich Mo_(2)C for modulating the band structure via decomposing the pre-coordination bonded polymer in a pressure-tight tube sealing ***-bonded c/N-Mo in the coordination precursor constructs a micro-confinement space,enabling the homogeneous nitrogenization in-situ happened during the formation of Mo_(2)***,the evolved gases from the precursor decomposition in tube sealing system establish a macro-confinement environment,preventing the lattice N escape and further endowing a continuous *** the multiscale confinement effects,the nitrogen-rich Mo2C displays as high as 25%N-Mo concentration in carbide lattice,leading to a satisfactory band ***,the constructed nitrogen-rich Mo_(2)C reveals an adorable catalytic activity for HER in both alkaline and acid *** is anticipated that the multiscale confinement synthesis strategy presents guideline for the rational design of electrocatalysts and beyond.

关键词： Molybdenum carbide Hydrogen evolution reaction Multiscale confinement synthesis Valence band modulation Nitrogen doping

Modularized sulfur storage achieved by 100% space utilization host for high performance lithium-sulfur batteries

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Chinese Chemical Letters 2024年第4期35卷 237-243页

作者： Jun Jiang Tong Guo Wuxin Bai Mingliang Liu Shujun Liu Zhijie Qi jingwen sun Shugang Pan Aleksandr L.Vasiliev Zhiyuan Ma Xin Wang Junwu Zhu Yongsheng Fu Key Laboratory for Soft Chemistry and Functional Materials of Ministry of Education Nanjing University of Science and TechnologyNanjing 210094China Changzhou Institute of Technology Changzhou 213032China Shubnikov Institute of Crystallography Russian Academy of SciencesLeninskii pr.59Moscow 119333Russia Jiangsu Pylon Battery Co. Ltd.Yangzhou 211400China

Popularization of lithium-sulfur batteries(LSBs) is still hindered by shuttle effect and volume ***, a new modularized sulfur storage strategy is proposed to solve above problems and accomplished via employing 100% space utilization host material of cobalt loaded carbon nanoparticles derived from ZIF-67. The modular dispersed storage of sulfur not only greatly increases the proportion of active sulfur,but also inhibits the occurrence of volume expansion. Meanwhile, 100% space utilization host material can greatly improve the conductivity of the cathode, provide a larger electrolyte wetting interface and effectively suppress the shuttle effect. Moreover, loaded cobalt particles have high catalytic activity for electrochemical reaction and can effectively improve the redox kinetics. The cell with new cathode host material carbonized at 650 ℃(ZIF-67(650 ℃)) exhibits superior rate performance and can maintain a high specific capacity of 950 m Ah/g after 100 cycles at 0.2 C, showing a good cycle stability.

关键词： Modularized sulfur storage Space utilization Cathode host material ZIF-67 Lithium-sulfur batteries

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新冠病毒肺炎疫情对白内障患者就医的影响

航空航天医学杂志 2024年第2期35卷 132-135页

作者：孙敬文哈尔滨二四二医院哈尔滨150066

目的分析新冠病毒肺炎疫情对短眼轴白内障患者就医及术后疗效的影响。方法选取2020年01月-2022年10月到哈尔滨二四二医院眼科就诊的短眼轴(AL≤22.5)白内障患者60例。观察组30例为膨胀期老年性白内障患者,晶状体膨胀,眼压介于21 mmHg-40... 详细信息

目的分析新冠病毒肺炎疫情对短眼轴白内障患者就医及术后疗效的影响。方法选取2020年01月-2022年10月到哈尔滨二四二医院眼科就诊的短眼轴(AL≤22.5)白内障患者60例。观察组30例为膨胀期老年性白内障患者,晶状体膨胀,眼压介于21 mmHg-40 mmHg之间;对照组30例为老年性白内障患者未成熟期,晶状体混浊,眼压正常患者。观察组患者入院后给予降眼压治疗(派立明(布林佐胺)眼药水和阿法根(酒石酸溴莫尼定)眼药水,各一日两次点眼)。完善检查后行白内障超声乳化吸除术联合一期人工晶体植入术联合房角分离术;对照组行白内障超声乳化吸除术联合人工晶体植入术,术后1天分别观察两组患者的视力、眼压,术后一个月观察两组患者的视力、眼压、前房深度和视野。结果两组患者在发病年龄、术前视力和患眼眼轴长度三个方面比较,差异无统计学意义(P≥0.05),术前眼压和前房深度的差异有统计学意义(P≤0.01);术中白内障超声乳化时间的差异没有统计学意义(P≥0.05);术后一天观察组和对照组最佳矫正远视力和眼压比较差异均有统计学意义(P≤0.01);术后一个月观察组和的最佳矫正远视力、视野比较差异有统计学意义(P≤0.01),眼压和前房深度比较差异无统计学意义(P≥0.05);观察组的术前眼压分别与术后一天、术后一个月进行比较,差异均有统计学意义(P≤0.01);对照组术前眼压和术后一天、术后一个月比较差异无统计学意义(P≥0.05);两组术前和术后一天、术后一个月前房深度比较差异均有统计学意义(P≤0.01)。结论对于短眼轴的白内障患者,应及时行白内障超声乳化吸除联合人工晶体植入手术,形成有效前房深度,避免由于晶状体膨胀,前房变浅,加重房角粘连,继发青光眼,导致术后视力、视野不佳,甚至需要行二期抗青光眼手术。

关键词：新冠病毒肺炎短眼轴白内障视野

“三孩”政策背景下社区支持与家庭育儿压力的关系探究

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成都师范学院学报 2024年第2期40卷 73-83页

作者：孙靖雯杨晓萍西南大学教育学部重庆400715

为探究社区支持对家庭育儿压力的影响,以502名幼儿家长作为调查对象,采用社区支持量表与家庭育儿压力量表调查社区支持水平和家庭育儿压力水平,以探析社区支持与家庭育儿压力之间的关系。结果发现,家庭育儿压力呈中等水平,且在育儿数量... 详细信息

为探究社区支持对家庭育儿压力的影响,以502名幼儿家长作为调查对象,采用社区支持量表与家庭育儿压力量表调查社区支持水平和家庭育儿压力水平,以探析社区支持与家庭育儿压力之间的关系。结果发现,家庭育儿压力呈中等水平,且在育儿数量、父母学历上存在显著差异;社区支持缺位,且在育儿数量、父亲学历上存在显著差异;社区支持与家庭育儿压力之间呈显著负相关,说明社区支持水平越高,家庭育儿压力越低。社区支持中的精神支持维度可以负向预测家长育儿压力。基于此,提出以下建议:转变家庭养育观念,充分认识社区支持家庭育儿的重要性;兼顾社区支持育儿的针对性和全面性;构建长效的社区支持育儿管理体制。

关键词：社区支持家庭育儿父母育儿压力 “三孩”政策生育政策生育意愿

活动期克罗恩病患者伴或不伴焦虑状态脑磁共振扩散峰度成像研究

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中华行为医学与脑科学杂志 2024年第5期33卷 432-438页

作者：岳柯岑孙静雯吴昕橦石海峰大连医科大学研究生院大连116044 南京医科大学附属常州第二人民医院影像科常州213000 南京医科大学附属常州第二人民医院消化科常州213000

目的:运用磁共振扩散峰度成像(diffusion kurtosis imaging,DKI)技术探究伴或不伴焦虑状态的活动期克罗恩病(Crohn's disease,CD)患者脑内微观结构改变,并探讨其与CD患者焦虑状态的关系。方法:纳入2022年1月至2023年1月在南京医科大学... 详细信息

目的:运用磁共振扩散峰度成像(diffusion kurtosis imaging,DKI)技术探究伴或不伴焦虑状态的活动期克罗恩病(Crohn's disease,CD)患者脑内微观结构改变,并探讨其与CD患者焦虑状态的关系。方法:纳入2022年1月至2023年1月在南京医科大学附属常州第二人民医院就诊的37例CD患者作为CD组,同期纳入20例健康被试为健康对照组。磁共振成像扫描之前,采用医院焦虑量表(hospital anxiety and depression scale-anxiety,HADS-A)来评估被试心理状态,依据HADS-A评分将CD组分为伴焦虑CD组(16例)和不伴焦虑CD组(21例)。磁共振成像扫描后通过DKE软件获得DKI各参数,采用单因素方差分析比较两组CD患者与健康对照组之间DKI参数的差异,运用Pearson相关性分析研究两组CD患者的差异脑区DKI参数值与心理量表评分之间的相关性。结果:3组轴向扩散峰度(axial diffusion kurtosis,AK)值在右侧脑岛、左侧颞上回、右侧丘脑、左侧颞中回、右侧颞下回、左侧舌回、右侧楔前叶均差异有统计学意义(F=3.060~9.627,均P<0.05),3组径向扩散峰度(radial diffusion kurtosis,RK)值在右侧小脑6区、左侧海马均差异有统计学意义(F=4.124,3.536,4.200,均P<0.05)。进一步多重比较结果显示,不伴焦虑CD组右侧脑岛(0.701±0.028)(P=0.019)、左侧颞上回(0.764±0.016)(P=0.002)、右侧丘脑(0.728±0.016)(P=0.001)AK值均低于健康对照组(0.726±0.010,0.780±0.015,0.771±0.082),右侧小脑6区RK低于健康对照组(P=0.021)。伴焦虑CD组右侧脑岛(P=0.023)、左侧颞上回(P=0.015)、右侧丘脑(P=0.031)、左侧颞中回(P=0.006)、右侧颞下回(P=0.001)、左侧舌回(P=0.007)AK值均低于健康对照组;右侧小脑6区(P=0.012)、左侧海马(P=0.004)RK值均低于健康对照组。伴焦虑CD组右侧脑岛(P=0.002)、右侧楔前叶(P=0.017)的AK值低于不伴焦虑CD组。伴有焦虑的CD组的右侧脑岛的AK值与红细胞沉降率(r=-0.47,P=0.048)、HADS-A评分(r=-0.68,P=0.002)、SES-CD(r=-0.84,P<0.001)以及患病时间(r=-0.61,P=0.008)均呈负相关。伴有焦虑CD组的左侧颞上回的AK值与HADS-A评分(r=-0.51,P=0.030)以及SES-CD(r=-0.48,P=0.046)呈负相关。结论:伴或不伴焦虑的CD患者部分脑区微观结构受损,表现为DKI参数值中的RK值和AK值下降,这可能与活动期CD患者的焦虑状态有关。

关键词：克罗恩病焦虑磁共振成像扩散峰度成像

我国学前融合教育课程:内涵意蕴、实践样态及建设路径

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绥化学院学报 2024年第1期44卷 12-16页

作者：杨晓萍孙靖雯西南大学教育学部重庆400715

学前融合教育课程是学前融合教育理念走向实践的关键环节,对于促进全体幼儿发展,推动我国学前教育普惠高质发展具有重要意义。但目前我国学前融合教育课程建设面临课程设置不适宜、课程实施缺少教师专业化支持、课程评价单一等现实困境... 详细信息

学前融合教育课程是学前融合教育理念走向实践的关键环节,对于促进全体幼儿发展,推动我国学前教育普惠高质发展具有重要意义。但目前我国学前融合教育课程建设面临课程设置不适宜、课程实施缺少教师专业化支持、课程评价单一等现实困境。据此提出我国学前融合教育课程的发展路径:转变传统课程观,提高学前融合教育课程的适宜性;大力培养融合教育师资,构建专业化学前融合教师队伍;注重个性化调整与评估,构建多元评价体系。

关键词：学前融合教育融合课程建构幼儿园课程

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The Doppler effect induced by earthquakes:A case study of the Wenchuan MS8.0 earthquake

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Geodesy and Geodynamics 2022年第5期13卷 435-444页

作者： Qicheng Li jingwen sun Guimei Xi Jing Liu Mining College Liaoning Technical UniversityLiaoning 123000China Chaoyang Teachers College Liaoning 122000China Chaoyang Open University Liaoning 122000China

Seismologists have found that the first arrival frequencies of P waves at different seismic stations have different widths,that is,different periods or frequencies,and they think that this phenomenon can be used to identify whether a Doppler effect is induced by ***,the fault rupture process of a real earthquake is so complex that it is difficult to identify a frequency shift similar to the Doppler effect.A method to identify whether a Doppler effect is induced by an earthquake is proposed *** a seismic station is in the direction of fault rupture propagation,this station could observe a Doppler effect induced by the *** Doppler effect causes the frequency of the seismic wave to shift from low frequency to high frequency,and the high frequency amplitudes become mutually *** the combined influences of the absorption effect,geometric spreading effect and Doppler effect,the high frequency amplitude of the seismic wave will gradually become higher than the low frequency amplitude with increasing epicentral *** we find that the high frequency amplitude is higher than the low frequency amplitude with increasing epicentral distance in the direction of fault rupture propagation,then there is a Doppler *** fault that generated the Wenchuan earthquake is a reverse fault,and its horizontal rupture propagation velocity was *** link fault rupture propagation velocity with the Doppler effect and identify the Doppler effect more easily,we decompose three-component records into two directions:the direction of fault rupture propagation and the direction perpendicular to the fault rupture propagation along the fault *** initial components of the two directions are processed by wavelet *** seismic stations in the direction of fault rupture propagation of the Wenchuan earthquake were selected,and it was found that with increasing epicentral distance,the high frequency amplitudes of the wavelet spectra b

关键词： Doppler effect First arrival frequency of P wave Fault rupture propagation velocity Wavelet transform The wenchuan earthquake

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混合储能系统载波移相充放电控制策略

海军工程大学学报 2024年第2期36卷 6-12页

作者：周细文朱俊杰许金吴志程孙靖雯合肥召洋电子科技有限公司合肥230011 海军工程大学电磁能技术全国重点实验室武汉430033

为了提高混合储能运行的安全性和灵活性,确保储能模块的均衡性和一致性,首先针对电磁发射负载复杂的运行特性,设计了一种混合储能分组级联拓扑结构,详细介绍了其工作原理和4种运行模式;然后,开展了针对混合储能分组级联拓扑的载波移相... 详细信息

为了提高混合储能运行的安全性和灵活性,确保储能模块的均衡性和一致性,首先针对电磁发射负载复杂的运行特性,设计了一种混合储能分组级联拓扑结构,详细介绍了其工作原理和4种运行模式;然后,开展了针对混合储能分组级联拓扑的载波移相充放电控制的研究,分别结合锂电池充电模式、超级电容充电模式以及电磁发射驱动模式,研究了载波移相策略的应用方法和充放电策略;最后,针对上述3种模式分别进行了试验,验证了载波移相策略的可行性以及在锂电池模块故障状态下瞬时旁路的功能,同时证明了该策略具有提高系统灵活性、保持各锂电池储能模块均衡性和一致性的优势特点。

关键词：电磁发射混合储能系统分组级联拓扑载波移相

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