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RELATIONSHIP AMONG EVAPORATION FLUX OF GROUNDWATER, DEPTH OF WATER TABLE AND NEGATIVE PRESSURE HEAD IN BARE SOIL

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Journal of Hydrodynamics 2000年第4期12卷 52-58页

作者： qian, J.Z. Zhu, X.y. Zhou, N.Q. Li, G.y. Dep. of Earth Sci. Nanjing Univ. Nanjing 210093 China

Evaporation of ground water is a part of moisture circulation in the field. And it is a main natural form in which water transmits from the ground water to the soil water and atmosphere water. According to the simulated experiments, we study the relationship among the evaporation, depth of groundwater table and negative pressure. By theoretical analysis of the experimental results, the main conclusions are drawn as follows. There are two abrupt points in every Q-H curve. The locations of the abrupt points are separately in step with the height of top of the capillary fringe and the height of maximal capillary rise in the soil section. When the depth of water table H is small, the evaporation flux of ground water is large. While the depth of water table exceeds the maximal capillary rise of media in vadose zone, the capillary rise breaks up and evaporation flux of groundwater is small. The water content ratio in ground surface tends to be zero and the surface of soil tends to be drought. These conclusions show that the maximal capillary rise of media in vadose zone is an important value in regulating rational depth of ground water to reduce the evaporation of ground water and to increase effective quantity of water resources. In the meantime, these conclusions are of important theoretical and practical significance to reduce the evaporation of ground water, to prevent and cure the salinization of soil, and to make full use of and protect water resources in the northern plains in China.

关键词： Capillarity Evaporation Soils

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生成式人工智能实践中的主体遭遇与教育应对

当代教研论丛 2025年第1期11卷 12-19页

作者：闫欠欠王连照天津师范大学教育学部天津300387

生成式人工智能的教育应用深化了个体对自我的认知定位,同时对与他者的关系建构有了新的审视。人与技术关系的发展主要经历了人与技术的二元对立、人作为技术的主人以及技术对人的僭越等阶段;在此过程中,人的主体性异化引发了面对自我... 详细信息

生成式人工智能的教育应用深化了个体对自我的认知定位,同时对与他者的关系建构有了新的审视。人与技术关系的发展主要经历了人与技术的二元对立、人作为技术的主人以及技术对人的僭越等阶段;在此过程中,人的主体性异化引发了面对自我时的主体性认同危机和面对他者时的主体性交流危机。为应对生成式人工智能实践中的主体遭遇,需要通过教育提升数字素养,建构人与技术的共生关系;重视关系建构,推进人类命运共同存续。

关键词：生成式人工智能主体性危机人与技术教育应对

Cardiovascular Diabetology|空间多组学图谱揭示糖尿病大血管病变中的平滑肌表型转化与代谢重编程

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中国临床药理学与治疗学 2025年第2期 237页

作者： qian y Xiong S Li L Sun Z Zhang L yuan W Cai H Feng G Wang X yao H Gao y Guo L Wang Z 王中群江苏大学附属医院心内科

大血管病变是糖尿病影响人类健康的重要杀手，平滑肌细胞（SMCs）表型转化是糖尿病大血管病变的关键机制。随着空间多组学和单细胞技术的发展，基于组织切片的二维空间结构可实现纳米级基因表达检测，深入揭示疾病的病理学与病理生理学...

大血管病变是糖尿病影响人类健康的重要杀手，平滑肌细胞（SMCs）表型转化是糖尿病大血管病变的关键机制。随着空间多组学和单细胞技术的发展，基于组织切片的二维空间结构可实现纳米级基因表达检测，深入揭示疾病的病理学与病理生理学机制。有鉴于此，江苏大学附属医院王中群教授团队对糖尿病患者的下肢血管进行了空间转录组、空间代谢组和单细胞测序的系列研究。

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An AuNPs/Mesoporous NiO/Nickel Foam Nanocomposite as a Miniaturized Electrode for Heavy Metal Detection in Groundwater

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Engineering 2023年第8期27卷 199-208页

作者： Boyuan Xue qian yang Kaidong Xia Zhihong Li George y.Chen Dayi Zhang Xiaohong Zhou State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China National Key Laboratory of Science and Technology on Micro/Nano Fabrication Institute of MicroelectronicsPeking UniversityBeijing 100871China Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things Guangdong and Hong Kong Joint Research Centre for Optical Fiber SensorsShenzhen UniversityShenzhen 518060China College of New Energy and Environment Jilin UniversityChangchun 130021China The Research Institute of Environmental Innovation(Suzhou) Tsinghua UniversitySuzhou 215000China

Heavy metals,notably Pb2+and Cu^(2+),are some of the most persistent contaminants found in *** monitoring of these metals,which relies on efficient,sensitive,cost-effective,and reliable methods,is a *** present a nanocomposite-based miniaturized electrode for the concurrent measurement of Pb2+and Cu^(2+)by exploiting the electroanalytical technique of square wave *** also propose a facile in situ hydrothermal calcination method to directly grow binder-free mesoporous Ni O on a three-dimensional nickel foam,which is then electrochemically seeded with gold nanoparticles(Au NPs).The meticulous design of a low-barrier Ohmic contact between mesoporous Ni O and Au NPs facilitates target-mediated nanochannel-confined electron transfer within mesoporous Ni *** a result,the heavy metals Pb2+(0.020 mg.L^(-1)detection limit;2.0–16.0 mg.L^(-1)detection range)and Cu^(2+)(0.013 mg.L^(-1)detection limit;0.4–12.8 mg.L^(-1)detection range)can be detected simultaneously with high ***,other heavy metal ions and common interfering ions found in groundwater showed negligible impacts on the electrode’s performance,and the recovery rate of groundwater samples varied between 96.3%±2.1%and 109.4%±0.6%.The compactness,flexible shape,low power consumption,and ability to remotely operate our electrode pave the way for onsite detection of heavy metals in groundwater,thereby demonstrating the potential to revolutionize the field of environmental monitoring.

关键词： AuNPs Mesoporous NiO Miniaturized electrode Heavy metal ions Groundwater Square wave voltammetry

Improved mechanical properties and strengthening mechanism with the altered precipitate orientation in magnesium alloys

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Journal of Magnesium and Alloys 2022年第5期10卷 1256-1267页

作者： y.J.Wan y.Zeng y.C.Dou D.C.Hu X.y.qian Q.Zeng K.X.Sun G.F.Quan Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Material Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China College of Materials Science and Engineering Sichuan University of Science and EngineeringZigong 643000China Department of Materials The University of ManchesterOxford RoadManchester M139PLUnited Kingdom

Aging prior to twinning deformation was proposed to alter the precipitate orientation of the plate-shapedβ-MgAlfrom(0002)basal planes(named basal plates)to■prismatic planes(named prismatic plates)in AZ31 Mg *** experimental results showed that the compressive yield strength(CyS)of the sample containing prismatic plates increased 40 MPa and the compression ratio raised by 22%compared to that containing basal *** underlying strengthening mechanism was analyzed via a yield strengthen(yS)model with a function of grain size,precipitate characters(size,oritention,fraction)and Schmid factor(SF).It revealed that the improvement of CyS was mainly attributed to the altered precipitate orientation and refined grain size produced by twinning ***,the prismatic plates always have a stronger hardening effect on basal slip than basal plates under the same varites of precipitate diameter and ***,the decreased CRSS ratio of prismatic slip to basal slip revealed that the activity of non-basal slip in Mg alloy might be *** activated slip systems provided more mobile dislocations,contributing to the large compression ratio of the Mg rolled sheet with prismatic plates.

关键词： Precipitate orientation Precipitation strengthening Grain boundary strengthening yield strength model

Self-induced birefringence of white-light continuum generated by interaction of focused femtosecond laser pulses with fused silica

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High Power Laser Science and Engineering 2020年第2期8卷 71-76页

作者： J.qian G.D.Wang K.y.Lou D.y.Shen Q.Fu Q.Z.Zhao State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

White-light continuum can be induced by the interaction of intense femtosecond laser pulses with condensed *** using two orthogonal polarizers,a self-induced birefringence of continuum is observed when focusing femtosecond laser pulses into bulk fused *** is,the generated white-light continuum is synchronously modulated anisotropically while propagating in fused ***-resolved detection confirms that self-induced birefringence of continuum shows a growth and saturation feature with time *** adjusting laser energy,the transmitted intensity of continuum modulated by self-induced birefringence also varies *** analysis with time evolution indicates that it is the focused femtosecond laser pulses that induce anisotropic microstructures in bulk fused silica,and the anisotropic structures at the same time modulate the generated continuum.

关键词： femtosecond laser pulses fused silica self-induced birefringence white-light continuum

不同羊肚菌菌株的子实体挥发性风味成分分析及其香气评价

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菌物学报 2025年第1期44卷 149-169页

作者：张谦许瀛引董茜舒雪琴张仕林谢丽源彭卫红王海霞四川省食用菌研究所国家农业微生物新都观测实验站食药用菌育种与栽培国家地方联合工程实验室宁夏农林科学院园艺研究所

为探究宁夏地区不同羊肚菌菌株的子实体中风味物质的差异，采用顶空固相微萃取和气相色谱-质谱联用技术(headspace-solid phase micro extraction-gas chromatography-mass spectrometry)结合电子鼻技术对9个不同羊肚菌菌株的子实体风... 详细信息

为探究宁夏地区不同羊肚菌菌株的子实体中风味物质的差异，采用顶空固相微萃取和气相色谱-质谱联用技术(headspace-solid phase micro extraction-gas chromatography-mass spectrometry)结合电子鼻技术对9个不同羊肚菌菌株的子实体风味进行分析，共鉴定出82种挥发性化合物，其中共有挥发性成分有22种。从整体气味感知来看，电子鼻可以快速且有效地区分9个羊肚菌菌株的子实体的挥发性风味。9个羊肚菌菌株的子实体中相对气味活度值(relative odor activity value)大于0.1的挥发性成分有18种，其中反式-2-辛烯-1-醇对013和105样品香气贡献最大，具有柑橘味和脂肪香；异戊醛对159、196、HLGO、SB25C、y1(1719)样品香气贡献最大，具有麦芽香和水果香；2(5H)-呋喃酮对166、Ly样品香气贡献最大，具有坚果香和椰香。进一步对这18种风味物质进行主成分分析，建立综合函数品质评价模型，发现菌株105羊肚菌评分最高，说明其风味品质最好。

关键词：羊肚菌电子鼻顶空固相微萃取-气相色谱-质谱挥发性风味相对气味活度值

Variant selection in additively manufactured alpha-beta titanium alloys

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Journal of Materials Science & Technology 2022年第18期113卷 14-21页

作者： S.L.Lu C.J.Todaro y.y.Sun T.Song M.Brandt M.qian Centre for Additive Manufacturing School of Engineering RMIT University School of Mechanical and Aerospace Engineering Nanyang Technological University

Alpha-beta(α-β)titanium alloys such as Ti-6Al-4V(wt.%,here-after the same)and Ti-6Al-2Sn-4Zr-2Mo fabricated by fusion-based additive manufacturing(AM)typically exhibit a strong columnar prior-βgrain *** columnar prior-βgrains with their001along the build direction not only lead to solidification tex-ture but also cause subsequentα-phase textures[1].The forma-tion of theseα-phase textures is a consequence of theβ→αtransformation obeying the Burgers orientation relationship(BOR)[1-5],which results in[0001]of theα-phase being orientated at about either 45°or 0°relative to the *** affect the deformation behaviour and mechanical properties[1,6].Defined by the BOR,a singleβ-phase grain can bring forth 12α-phase vari-ants[2,7],leading to significant microstructural ***α-phase variants do not form randomly in eachβ-phase ***,their formation displays specific crystallographic features,known asα-variant selection,which is common in Ti *** an extreme case,α-variant selection can lead to the formation of a singleα-phase crystal through anα→β→αtransformation cy-cle[8,9].

关键词： alloys grain transformation

基于WoS数据库的溶解性有机物质应用研究现状分析

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计算机应用文摘 2025年第2期41卷 170-172,175页

作者：杨炫张茜浙江安防职业技术学院浙江温州325016 杭州天晞绿科环保科技有限公司杭州311300

溶解性有机物质(DOM)富含碳、氮、磷等生物源元素,对全球碳循环和水体富营养化过程具有重要影响。研究DOM的来源、组成、结构及其空间变化,有助于全球生态环境的治理与保护。尽管国内外学者对DOM进行了大量研究,但鲜有研究对DOM的整体... 详细信息

溶解性有机物质(DOM)富含碳、氮、磷等生物源元素,对全球碳循环和水体富营养化过程具有重要影响。研究DOM的来源、组成、结构及其空间变化,有助于全球生态环境的治理与保护。尽管国内外学者对DOM进行了大量研究,但鲜有研究对DOM的整体研究趋势进行系统而深入的分析。文章对过去30年关于DOM的文献进行计量分析,结果表明,DOM的研究逐渐增多,美国在全球出版产出中占据主导地位。通过LDA主题模型分析,发现DOM研究涉及5大主要方向:“物质”“生物地球化学物理过程”“生物群落与生态系统”“环境因子与时空变化”以及“研究方法”。分析显示,DOM的来源、组成、特征、去除路径、时空分布以及研究方法等议题是当前的研究热点,DOM的研究正在趋于完善。研究还表明,未来DOM的研究可能会更侧重于陆地生态系统和大尺度时空研究,同时采用遥感等便捷且广泛的研究方法。此外,DOM的相关研究将继续应用于水环境监测与管理、全球气候变化和碳循环研究,有助于应对未来的环境挑战。

关键词：文献计量学冷门话题 DOM 热门话题 LDA主题模型