检索结果-南通市图书馆

Research hotspot and trend of plant water use in karst: Based on a bibliometric analysis from 1984 to 2022

China Geology 2025年第1期8卷 214-229页

作者： de-gen Zhu Jing Ning Hui yang Jun-bing Pu Jian-hua Cao Meng-xia Zhou Mitja Prelovsek Natasa Ravbar Key Laboratory of Karst Dynamics MNR and Guangxi Institute of Karst GeologyChinese Academy of Geological SciencesGuilin 541000China International Research Center on Karst under the Auspices of UNESCO National Center for International Research on Karst Dynamic System and Global ChangeGuilin 541000China Pingguo Guangxi Karst EcosystemNational Observation and Research StationPingguo 531406China Chongqing Normal University Chongqing 400000China Research Centre of the Slovenian Academy of Sciences and Art Karst Research InstituteTitov trg 26230 PostojnaSlovenia

Research on the ecohydrological processes of terrestrial plants is a frontier field comprising ecology,hydrology and global change research,yielding the key theoretical foundations of *** karst areas,due to its unique geological background,the karst landscape is strongly developed,with high bedrock exposure,high permeability,fragmented soils,shallow soils,and high spatial heterogeneity,resulting in very limited water storage for plant uptake and growth in rock fissures and shallow ***,water conditions are an important ecological factor influencing plant *** comprehensively understand the current progress and development trends in plant water use research focusing on karst areas,this paper uses the VOSviewer software to analyze the literature on plant water use in karst areas between 1984 and *** results showed that:(1)Research on plant water use in karst areas has developed rapidly worldwide,and the number of relevant studies in the literature have increased year by year,which together means that it is attracting more and more attention.(2)The investigation of plant water sources,geological background of karst areas,seasonal arid tropical climates,the relationship betweenδ13C values and plant water use efficiency,karst plant water use in karst savannas and subtropical areas,and ecosystems under climate change yields the knowledge base in this field.(3)Most studies in this area focus on the division of water sources of plants in karst areas,the methods of studying the water use sources of plants,and the water use strategies and efficiency of plants.(4)Future research will focus on how plant water use in karst areas is influenced by Earth’s critical zones,climate change,and ecohydrological *** studies will provide a key scientific basis for guiding ecological restoration and promoting sustainable development in karst areas.

关键词： Terrestrial plants Plant water use Karst area Climate change Ecohydrology Bibliometrics Ecological restoration Sustainable development Environmental restoration engineering Web of Science

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Unveiling the superior hydrogen evolution reaction activity of 1T-2H MoS_(2)heterointerface by on-chip microdevices

引用

Nano Research 2025年第1期18卷 149-156页

作者： Bowen Liu Junjie Xiong Shuaishuai Xu Xinying Luo Wenyan Yao Shigang Liu Yuting Du Qinghua Zhang yang Gao bin Wang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and Technology(NCNST)Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of Materials Science and Engineering China University of Petroleum(East China)Qingdao 266580China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China

The identification and clarification of active sites of MoS_(2)have long been the focus of research efforts in hydrogen evolution reaction(HER).In this study,we constructed phase transition-induced 1T-2H MoS_(2)heterojunction via lithium intercalation and evaluated the HER activity using on-chip electrocatalytic microdevices(OCEMs).The heterojunction achieved an overpotential of only 226 mV at a cathodic current density of 10 mA/cm^(2),outperforming the basal planes of 1T and 2H MoS_(2).Furthermore,density functional theory(DFT)calculations demonstrated that the charge redistribution occurs at the 1T-2H MoS_(2)interface with electrons transferring from 1T to 2H MoS_(2),and the interfacial S atom at the top site of 1T MoS_(2)presents the smallest overpotential of 0.37 ***,the interference from highly active edge sites was avoided by precisely exposing specific active areas,quantitatively revealing the catalytic activity order of different types of in-plane MoS_(2)active *** work enables a systematic investigation of the HER activity of various active sites in MoS_(2),laying the foundation for quantitative analysis of activity in other lowdimensional materials.

关键词： on-chip microdevice phase transition heterojunction MoS_(2) hydrogen evolution reaction(HER)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

风力发电机组机舱内部气流组织优化方法研究

引用

重型机械 2017年第1期 29-34页

作者：马铁强孙德滨苏阳阳沈阳工业大学机械工程学院辽宁沈阳110870 沈阳工业大学电气工程学院辽宁沈阳110870

针对兆瓦级风力发电机组机舱内部结构散热性能问题,在"下送尾排"式典型机舱散热布局的基础上,提出了"下送侧排"式、"侧送尾排"式和"侧送侧排"式等三种不同的散热气流组织形式。利用CFD软件对四种不同的机舱散热气流组织形式进行了温度... 详细信息

针对兆瓦级风力发电机组机舱内部结构散热性能问题,在"下送尾排"式典型机舱散热布局的基础上,提出了"下送侧排"式、"侧送尾排"式和"侧送侧排"式等三种不同的散热气流组织形式。利用CFD软件对四种不同的机舱散热气流组织形式进行了温度场数值模拟,并对模拟结果进行对比。在此过程中,提出了一种基于热源扰动的气流组织均匀性评价新方法,解决了无参照状态下机舱散热气流组织的孤本评价难题。模拟结果表明:"下送侧排"式是四种不同的散热气流组织形式中最好的散热布局结构。

关键词：风电机组气流组织 CFD 数值模拟热源扰动

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Advances in synaptic PET imaging and intervention with synapse-targeted small-molecular drugs for dementia diagnosis and therapy

引用

Fundamental Research 2025年第1期5卷 63-71页

作者： Lu, Xiuhong Ji, bin Huang, Gang Ding, Hong Shanghai Key Laboratory of Molecular Imaging Jiading District Central Hospital Affiliated Shanghai University of Medicine and Health Sciences Shanghai 201318 China School of pharmacy Shanghai University of Medicine and Health Sciences Shanghai 201318 China department of Radiopharmacy and Molecular Imaging School of pharmacy Fudan University Shanghai 201203 China

dementia is characterized by synaptic and neuronal dysfunction in disease-specific brain regions. Repeated failure of dementia clinical trials with therapeutic drugs targeting abnormal protein aggregates has caused researchers to shift their focus to synaptic functions and increased the importance of clinically available imaging for synaptic density and the development of synapse-targeted intervention. Synaptic density imaging with positron emission tomography (PET) tracer enables non-invasive detection of synaptic loss and hence investigates the association with other neuropathological events exemplified by disease-specific abnormal protein accumulation. Many studies have reviewed the progress of synaptic density imaging;however, to our knowledge, there is no article yet that summarizes the research progress of multimodal imaging of synaptic density tracers combined with other dementia biomarkers. Moreover, synaptic function intervention for dementia therapy has not yet been summarized. In this review, first we detail the progress of synaptic density imaging including tracer development and preclinical/clinical application, followed by a discussion of multimodal imaging of synaptic density tracers combined with classic dementia biomarkers in the clinical research stage. Finally, we briefly summarize the synapse-targeted drugs for dementia therapy. © 2024

关键词： dementia Multimodal imaging Positron emission tomography Synaptic density imaging Synaptic vesicle protein 2A UCB-J

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Surface element design of nanomaterials considering surface curvature dependence

引用

Acta Mechanica Sinica 2025年第1期41卷 42-53页

作者： Yongchao Zhang Lian Wang Fangxin Wang bin Li Xiaofan Gou College of Mechanics and Materials Hohai UniversityNanjing 211100China College of Architectural Science and Engineering Yangzhou UniversityYangzhou 225127China School of Mechanics and Photoelectric Physics Anhui University of Science and TechnologyHuainan 232001China

Nanomaterials have garnered recognition for their notable surface effects and demonstration of superior mechanical *** studies on the surface effects of nanomaterials,employing the finite element method,often relied on simplified twodimensional models due to theoretical ***,these simplified models inadequately represent the mechanical properties of nanomaterials and fail to capture the substantial impact of surface effects,particularly the curvature dependence of *** study applies the principle of minimum energy and leverages the Steigmann-Ogden surface theory of nanomaterials to formulate a novel finite element surface element that comprehensively accounts for surface *** conducted an analysis of the stress distribution and deformation characteristics of four typical 2D and 3D nanomaterial *** accuracy of the developed surface element and finite element calculation method was verified through comparison with established *** resulting finite element model provides a robust and compelling scientific approach for accurately predicting the mechanical performance of nanomaterials.

关键词： Nanomaterials Surface effect Surface element curvature dependence Finite element method

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

马来酰亚胺修饰的柠檬苦素纳米粒的制备、表征及其口服药动学研究

引用

中草药 2025年第2期56卷 487-498页

作者：陈永顺杨斌商丘医学高等专科学校广西医科大学

目的制备马来酰亚胺修饰的柠檬苦素纳米粒（maleimide-modified limonin nanoparticles,Mal-Lim-NPs），对其理化性质进行表征，并研究其口服药动学行为。方法单因素结合Box-Behnken设计-效应面法（Box-Behnken design-response surface method,BBD-RSM）优化Mal-Lim-NPs处方工艺，并制成冻干粉。X射线粉末衍射法（X-ray powder diffraction,XRPD）分析柠檬苦素在Mal-Lim-NPs冻干粉中的晶型，透射电子显微镜（transmission electron microscope,TEM）观察MalLim-NPs微观外貌，测定Mal-Lim-NPs冻干粉在pH 2.0、5.0、6.8磷酸盐缓冲液（PBS）中的溶解度和释放度。SD大鼠分别ig给予柠檬苦素和Mal-Lim-NPs冻干粉，绘制血药浓度-时间曲线，计算主要药动学参数。结果 Mal-Lim-NPs最佳处方：马来酰亚胺-聚乙二醇-聚乳酸[maleimide-methoxy poly（ethylene glycol）-poly（lactic acid）,Mal-PEG-PLA]与柠檬苦素用量比为7.5∶1，水相体积为35 mL，超声时间为13 min。Mal-Lim-NPs的平均包封率、载药量、粒径和ζ电位分别为（81.63±1.30）%、（9.32±0.24）%、（171.56±6.63）nm和（-16.60±0.92）m V。柠檬苦素在Mal-Lim-NPs冻干粉中晶型状态可能发生了改变，冻干粉复溶后Mal-Lim-NPs微观外貌仍近似球形。Mal-Lim-NPs冻干粉在pH 2.0、5.0、6.8 PBS中的释药行为均符合Weibull模型。Mal-Lim-NPs达峰时间(tmax)延后至（2.61±0.40）h，末端消除半衰期(t1/2)延长至（6.73±1.54）h，药峰浓度(Cmax)和时间曲线下面积(AUC0～t、AUC0～∞)分别提高至柠檬苦素的4.01倍和5.65、5.89倍。结论 Mal-Lim-NPs改变了柠檬苦素体内药动学行为，显著增加了口服药物吸收，为后续研究奠定基础。

关键词：柠檬苦素纳米粒马来酰亚胺修饰 Box-Behnken设计-效应面法体外释药口服药动学

来源：

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Improvement of charge-transfer kinetics via MXene and cobalt containing polyoxometalate loading on CdS for photocatalytic hydrogen production

引用

Science China Chemistry 2025年第2期68卷 772-780页

作者： Yu Feng Xiao Fang Jinnuo Zang bin Song Chunlian Hu Xiaoyu Dong Yong Ding State Key Laboratory of Applied Organic Chemistry Key Laboratory of Advanced Catalysis of Gansu ProvinceCollege of Chemistry and Chemical EngineeringLanzhou UniversityLanzhou 730000China State Key Laboratory of Low Carbon Catalysis and Carbon Dioxide Utilization State Key Laboratory for Oxo Synthesis and Selective OxidationLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

Hydrogen is a renewable and clean energy,and photocatalytic water splitting for hydrogen evolution technology is a promising technical means to solve the development *** this study,the ternary composite Co_(8)POM@MXene–CdS hybrid catalyst was constructed and used for photocatalytic hydrogen *** the condition of AM 1.5G simulated sunlight,the photocatalytic H_(2) evolution rate of the ternary composite was 8.13 mmol g^(−1) h^(−1),which was more than 25 times higher than that of the bare *** means of synchronous illumination X-ray photoelectron spectroscopy(SI-XPS)and density functional theory(DFT)calculations,it was proved that the loading of MXene and Co_(8)POM improved the photogenerated carrier separation and immigration efficiency on *** photogenerated electrons transfer from CdS to ***_(8)POM containing the{Co_(4)O_(3)}quasi-cubane,as an oxidation co-catalyst,accepts photogenerated holes from CdS to catalyze the oxidation reaction of TEOA,which improves the photocatalytic hydrogen production activity and the stability of CdS.

关键词： CdS polyoxometalates MXene hybrid catalyst photocatalytic hydrogen evolution

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Selenate-based heterojunction with cobalt-nickel paired site for electrocatalytic oxidation of 5-hydroxymethylfurfural coupling water splitting to produce hydrogen

引用

Journal of Energy Chemistry 2025年第2期101卷 156-162页

作者： Zhengru yang Jia Hui Wangxi Fan Pengcheng Liu Chunyong Zhang Shuang Dong Zhou yang department of Chemistry and Chemical Engineering & Jiangsu Key Laboratory of Clean Energy Storage and Conversion Jiangsu University of Technology Engineering Technology and Materials Research Center China Academy of Transportation Sciences School of Chemical Engineering and Materials Changzhou Institute of Technology

It is very appealing that 5-hydroxymethylfurfural（HMF） is electrocatalytical oxidized as 2,5-furandicarboxylic acid（FDCA） linking to non-classical cathodic hydrogen（H2） ***,the electrocatalysts for electrocatalytic HMF oxidative reaction（e-HMFOR） have been facing low Faradaic efficiency（FE） and high water splitting ***,we propose a strategy of the NiSeO3@（CoSeO3）4heterojunction by constructing a Co-Ni paired site,where the Co site is in charge of adsorbing for HMF while the electrons are transferred to the Ni site,thus giving the NiSeO3@（CoSeO3）4heterojunction superior electrocata lytic performances for e-HMFOR and water *** optimizing conditions,the NiSeO3@（CoSeO3）4heterojunction has high conversion of 99.7%,high selectivity of 99.9%,and high FE of 98.4% at 1.3 V,as well as low cell voltage of 1.31 V at 10 mA cm-2in 1 M KOH+0.1 M *** study offers a potential insight for e-HMFOR to high value-added FDCA coupling water splitting to produce H2in an economical manner.

关键词： Co-Ni paired site e-HMFOR FDCA Heterojunction Hydrogen evolution

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

High-temperature-tolerant flexible supercapacitors: Gel polymer electrolytes and electrode materials

引用

Journal of Energy Chemistry 2025年第1期100卷 426-457页

作者： Chong Peng Xinyi Huang Mingwei Zhao Shuling Liao Quanhong yang Nianjun yang Siyu Yu School of Chemistry&Chemical Engineering Southwest UniversityChongqing 400715 China Nanoyang Group Tianjin Key Laboratory of Advanced Carbon and Electrochemical Energy StorageSchool of Chemical Engineering and Technologyand Collaborative Innovation Center of Chemical Science and Engineering(Tianjin)Tianjin UniversityTianjin 300072 China department of Chemistry&IMO–IMOMEC Hasselt UniversityDiepenbeek 3590Belgium Received 26 July 2024Revised 19 Aug

The development of flexible supercapacitors(FSCs) capable of operating at high temperatures is crucial for expanding the application areas and operating conditions of supercapacitors. Gel polymer electrolytes and electrode materials stand as two key components that significantly impact the efficacy of hightemperature-tolerant FSCs(HT-FSCs). They should not only exhibit high electrochemical performance and excellent flexibility, but also withstand intense thermal stress. Considerable efforts have been devoted to enhancing their thermal stability while maintaining high electrochemical and mechanical performance. In this review, the fundamentals of HT-FSCs are outlined. A comprehensive overview of state-of-the-art progress and achievements in HT-FSCs, with a focus on thermally stable gel polymer electrolytes and electrode materials is provided. Finally, challenges and future perspectives regarding HT-FSCs are discussed, alongside strategies for elevating operational temperatures and *** review offers both theoretical foundations and practical guidelines for designing and manufacturing HT-FSCs, further promoting their widespread adoption across diverse fields.

关键词： Flexible supercapacitors High-temperature tolerance Gel polymer electrolytes Electrode materials

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Bandgap characteristics analysis and graded design of a novel metamaterial for flexural wave suppression

引用

Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 1-24页

作者： Fan yang Zhaoyang MA Xingming GUO Shanghai Key Laboratory of Mechanics in Energy Engineering Shanghai Institute of Applied Mathematics and Mechanics School of Mechanics and Engineering ScienceShanghai University Shanghai Institute of Aircraft Mechanics and Control

A novel elastic metamaterial is proposed with the aim of achieving lowfrequency broad bandgaps and bandgap regulation. The band structure of the proposed metamaterial is calculated based on the Floquet-Bloch theorem, and the boundary modes of each bandgap are analyzed to understand the effects of each component of the unit cell on the bandgap formation. It is found that the metamaterials with a low elastic modulus of ligaments can generate flexural wave bandgaps below 300 Hz. Multi-frequency vibrations can be suppressed through the selective manipulation of bandgaps. The dual-graded design of metamaterials that can significantly improve the bandgap width is proposed based on parametric studies. A new way that can regulate the bandgap is revealed by studying the graded elastic modulus in the substrate. The results demonstrate that the nonlinear gradient of the elastic modulus in the substrate offers better bandgap performance. Based on these analyses, the proposed elastic metamaterials can pave the way for multi-frequency vibration control, low-frequency bandgap broadening, and bandgap tuning.

关键词： flexural wave bandgap graded design local resonance metamaterial O421+.5

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：