检索结果-南通市图书馆

Journal of Environmental Sciences 2008年第6期20卷 652-657页

作者： lu haiming YIN Chengqing Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China Nanjing Hydraulic Research Institute State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing 210029 China

This field study investigated the nitrogen concentrations in the shallow groundwater from an ephemeral stream and four land uses： cropland, two-year restored （2yr） and five-years restored （Syr） woodlands, fishponds, and the nitrogen flux in the riparian zone of Yuqiao Reservoir. The groundwater nitrate-N concentrations in cropland were the highest among the four land uses. Total dissolved nitrogen （TDN） and nitrate-N concentrations in the 2yr woodland were significantly （p 〈 0.05） higher than in 5yr woodland. The lowest nitrogen concentrations were detected in fishponds. Nitrate-N was the main form in cropland and 2yr woodland, whereas both nitrate-N and dissolved organic nitrogen （DON） were the main species in 5yr woodland and fishponds. But, ammonium-N was the main form in the ephemeral stream. During the rainy season, the groundwater flow with dissolved nitrogen drains from upland into the reservoir along the hydraulic gradient. The woodland between the cropland and reservoir could act as a buffer to retain shallow groundwater nitrogen. The dominant form of ammonium-N in the groundwater TDN pool in ephemeral stream indicated that nitrogen from the village and orchard in upland flowed into the reservoir via subsurface flow. The fishpond was not an important pollution source for nitrogen transfer via shallow groundwater.

关键词： nitrogen groundwater reservoir fishpond cropland woodland riparian zone

Mechanical Properties and Deformation Mechanisms of Metallic Glasses Under Hydrostatic Pressure

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Acta Mechanica Solida Sinica 2023年第3期36卷 390-404页

作者： haiming lu Yao Tang Fanheng Jiang Panpan Wan Haofei Zhou Center for X-Mechanics Department of Engineering MechanicsZhejiang UniversityHangzhou 310027China

Metallic glasses(MGs)are promising structural materials with high strength,large elastic strain limit and enhanced wear *** the way to tune the mechanical performance of MGs,numerous efforts have been devoted to investigating the effect of hydrostatic pressure(σh)on the mechanical properties and deformation mechanisms of *** application of sufficiently large magnitudes ofσh to MGs has been considered a feasible way to improve strength and delocalize plastic deformation in *** this paper,we review recent studies on pressure-dependent thermodynamic properties,mechanical strength and hardness,as well as elevated ductility of MGs due to the pressure-induced change of deformation and failure *** of intriguing mechanical behaviors of MGs,and the corresponding theoretical modeling and atomistic understanding of plastic deformation in MGs under pure hydrostatic pressure and more general stress states are *** findings not only deepen the understanding of pressure-dependent mechanical behaviors of MGs,but also point out the potential of tuning mechanical behaviors of MGs through stress engineering.

关键词： Metallic glass Hydrostatic pressure Mechanical property Deformation mechanism Microstructure

Enhanced low-field magnetocaloric effect in Nb and Al co-substituted EuTiO_(3)compounds

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Journal of Materials Science & Technology 2022年第23期118卷 137-144页

作者： Huicai Xie Wenxia Su haiming lu Zhaojun Mo Dunhui Wang Hao Sun lu tian Xinqiang Gao Zhenxing Li Jun Shen Ganjiang Innovation Academy Chinese Academy of SciencesGanzhou 341000China Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou 341000China National Laboratory of Solid State Microstructures Jiangsu Provincial Key Laboratory for NanotechnologySchool of PhysicsNanjing UniversityNanjing 210093China Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing 100190China

The magnetic ground state switching between antiferromagnetic(AFM)and ferromagnetic(FM)states in EuTiO_(3)provides the feasibility of regulating its magnetic properties and magnetocaloric ***-principles calculations demonstrate that the magnetic ground states for EuTi_(0.875)Nb_(0.0625)Al_(0.0625)O_(3),EuTi_(0.8125)Nb_(0.125)Al_(0.)0_(625)O_(3),and EuTi_(0.75)Nb_(0.125)Al_(0.125)O_(3)are FM *** results also exhibit the FM coupling domination in these compounds,accompanied by a significantly enhanced low magnetic field magnetocaloric *** maximum magnetic entropy change of all the samples surpasses15 J kg^(-1)K^(-1)with a field change of 1 *** is 1.4 times as large as that of bulk EuTiO_(3).Especially,the maximum refrigerating capacity for EuTi_(0.8125)Nb_(0.125)Al_(0.0625)O_(3)compound is evaluated to be 88.1 J kg^(-1),more than three times of that of EuTiO_(3).The remarkable magnetocaloric performances prove Nb and Al co-substituted EuTiO_(3)compounds to be competitive candidates for magnetic refrigeration in the liquid helium temperature regime.

关键词： Magnetocaloric effect Europium titanate(EuTiO_(3)) Ferromagnetic Magnetic refrigeration

Light from space illuminating the polar silk road

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International Journal of Digital Earth 2022年第1期15卷 2028-2046页

作者： Xiao-Ming Li Yujia Qiu Yacheng Wang Bingqing Huang haiming lu Min Chu Han Fu Fengming Hui International Research Center of Big Data for Sustainable Development Goals BeijingPeople’s Republic of China Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijingPeople’s Republic of China University of Chinese Academy of Sciences BeijingPeople’s Republic of China Space Star Technology CO. LTDBeijingPeople’s Republic of China COSCO Shipping Specialized Carriers CO. LTDGuangzhouPeople’s Republic of China CMA Earth System Modeling and Prediction Centre (CEMC) BeijingPeople’s Republic of China State Key Laboratory of Severe Weather (LaSW) BeijingPeople’s Republic of China State Key Laboratory of Space-Ground Integrated Information Technology Beijing Institute of Satellite Information EngineeringBeijingPeople’s Republic of China School of Geospatial Engineering and Science Sun Yat-Sen Universityand Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai)ZhuhaiPeople’s Republic of China

The rapid decline of Arctic sea ice has been reminding us the significant impacts caused by global ***,the other side of the coin is that this opens a window to utilize the Arctic sea routes in the summer seasons,bringing remarkable economic benefits for ocean transportation between Asia and ***,commercial vessels with low ice classes must tackle substantial environmental challenges in the Arctic sea routes,particularly those caused by variable sea ice,even in the melting ***,the science-based support for shipping safety in the Arctic sea routes is being given more *** satellite remote sensing technology plays a critical role in environmental monitoring in the *** paper reviews state-of-the-art satellite observations on monitoring sea ice and potential applications on supporting shipping activities in the Arctic ***,we introduced a recently developed system based on satellite observations to support the safe transportation of Chinese cargo vessels in the Arctic northern sea route,demonstrating the efforts by both the science and business communities to promote the development of the polar silk road.

关键词： Arctic northern sea route earth observation digital earth sustainable development

Cartilage-targeting peptide-modified dual-drug delivery nanoplatform with NIR laser response for osteoarthritis therapy

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Bioactive Materials 2021年第8期6卷 2372-2389页

作者： Song Xue Xiaojun Zhou Weilin Sang Cong Wang haiming lu Yiming Xu Yiming Zhong Libo Zhu Chuanglong He Jinzhong Ma Department of Orthopedics Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai200080China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of ChemistryChemical Engineering and BiotechnologyDonghua UniversityShanghai201620China

Cartilage-targeting delivery of therapeutic agents is still an effective strategy for osteoarthritis(OA)***,scavenging for reactive oxygen species(ROS)and activating autophagy have been increasingly reported to treat OA *** this study,we designed,for the first time,a dual-drug delivery system based on metal organic framework(MOF)-decorated mesoporous polydopamine(MPDA)which composed of rapamycin(Rap)loaded into the mesopores and bilirubin(Br)loaded onto the shell of *** collagen II-targeting peptide(WYRGRL)was then conjugated on the surface of above nanocarrier to develop a cartilage-targeting dual-drug delivery nanoplatform(RB@MPMW).Our results indicated the sequential release of two agents from RB@MPMW could be achieved via near-infrared(NIR)laser ***,the rapid release of Br from the MOF shell exhibited excellent ROS scavenging ability and anti-apoptosis effects,however responsively reduced autophagy activity,to a certain ***,following the NIR irradiation,Rap was rapidly released from MPDA core and further enhanced autophagy activation and chondrocyte ***@MPMW continuously phosphorylated AMPK and further rescued mitochondrial energy metabolism of chondrocytes following IL-1βstimulation via activating SIRT1-PGC-1αsignaling ***,the cartilage-targeting property of peptide-modified nanocarrier could be monitored via Magnetic Resonance(MR)and IVIS *** significantly,RB@MPMW effectively delayed cartilage degeneration in ACLT rat ***,our findings indicated that the as-prepared dual-drug delivery nanoplatform exerted potent anti-inflammation and anti-apoptotic effects,rescued energy metabolism of chondrocytes in vitro and prevented cartilage degeneration in vivo,which thereby showed positive performance for OA therapy.

关键词： Osteoarthritis Targeting therapy Autophagy Oxidative stress Energy metabolism

Preparation of ultrathin ReS2 nanosheets and their application to Q-switched Er-doped fiber lasers

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Frontiers of Information Technology & Electronic Engineering 2021年第3期22卷 296-302页

作者： Junshan HE Guohua ZENG Shaoxian LIU haiming lu Ruixian XIE Jingjing QI Lili TAO Bo ZHOU School of Materials and Energy Guangdong University of TechnologyGuangzhou 510006China State Key Laboratory of luminescent Materials and Device South China University of TechnologyGuangzhou 510641China Guangdong Provincial Key Laboratory of Fiber Laser Materials and Applied Techniques South China University of TechnologyGuangzhou 510641China Guangdong Engineering Technology Research and Development Center of Special Optical Fiber Materials and Devices South China University of TechnologyGuangzhou 510641China

We study the exfoliation of ultrathin ReS2 nanosheets from the prepared ReS2 powder and their application to Q-switched Er-doped fiber ***,Raman,and XPS spectra confirm the successful preparation of the layered *** images show that the obtained ReS2 sheets have lateral size below 200 *** thickness of the ReS2 nanosheets is smaller than 5 nm according to the AFM ***2/PVA film is applied as a saturable absorber in an Er-doped Q-switched fiber laser,and a minimum pulse duration of 2.4μs and an output power of 1.25 mW are obtained,indicating the potential application to Q-switched lasers.

关键词： Rhenium disulfide Saturable absorber Two-dimensional materials Q-switched fiber laser

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基于柱镜光栅的超多视点大幅面立体画设计

清华大学学报（自然科学版） 2019年第4期59卷 249-255页

作者：谭祺瑞路海明卢增祥清华大学信息技术研究院北京100084 北京永新视博数字电视技术有限公司北京100085

光栅立体画广泛应用于户外大型广告、巨幅海报及舞台背景墙。针对目前光栅立体画视点数少、立体感弱、视点串扰等问题,提出了基于柱镜光栅的超多视点大幅面立体画设计方法。根据人眼的视觉原理和柱镜的光传输特性,推导了柱镜厚度、曲率... 详细信息

光栅立体画广泛应用于户外大型广告、巨幅海报及舞台背景墙。针对目前光栅立体画视点数少、立体感弱、视点串扰等问题,提出了基于柱镜光栅的超多视点大幅面立体画设计方法。根据人眼的视觉原理和柱镜的光传输特性,推导了柱镜厚度、曲率半径、光栅节距等参数的计算公式。设计了满足观看距离6m、观看区域3m、视点数59个的柱镜光栅。利用光学设计软件LightTools模拟了该系统的视点分布,视点宽度为50mm,小于正常成年人眼瞳距。设计了圆弧形柱镜光栅减小视点串扰,视点串扰值为11.7%～15.8%。对模拟结果进行了实验验证,结果表明所设计的超多视点大幅面立体画满足自由立体观看的要求。

关键词：光学设计大幅面立体画超多视点柱镜光栅

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基于空间三维物体重构的光场显示技术综述

清华大学学报（自然科学版） 2018年第9期58卷 773-780页

作者：谭祺瑞路海明卢增祥吉吟东清华大学信息技术研究院北京100084 北京永新视博数字电视技术有限公司北京100085

目前的三维显示技术,如视差屏障显示、柱镜光栅显示、多投影显示、扫描立体显示,通过运用双目视差、视觉暂留效应使人眼获得三维图像。这些显示技术将物体显示在二维平面上,并不是在空间中重构出三维物体,丢失了深度信息,易引起聚焦辐... 详细信息

目前的三维显示技术,如视差屏障显示、柱镜光栅显示、多投影显示、扫描立体显示,通过运用双目视差、视觉暂留效应使人眼获得三维图像。这些显示技术将物体显示在二维平面上,并不是在空间中重构出三维物体,丢失了深度信息,易引起聚焦辐辏调节冲突。体三维显示和全息显示可以在空间中重构出三维物体,但所需处理的数据量巨大,目前在计算速度、传输速率等方面都有技术限制。基于空间三维物体重构的光场显示技术利用光场在空间中重构出三维物体,主要包括层叠光场显示、快门光场显示、集成成像光场显示和矢量光场显示。该文分析了各种光场显示技术的原理和特点,认为矢量光场显示技术具有广阔的发展前景。

关键词：光场显示三维物体重构聚焦辐辏虚拟现实

试论中国近代建筑的科学性和民族性——以南京中国近代史遗址博物馆(总统府)建筑群为例

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中国博物馆 2019年第2期 10-15页

作者：卢海鸣南京出版社

南京中国近代史遗址博物馆(总统府)建筑群,是我国社会转型时期的重要历史见证物,也是我国近代建筑史上科学性和民族性有机统一的范例。该建筑群的科学性,既表现为建筑式样的多元化,也表现为建筑结构、功能和材料的多样化,该建筑群的民族... 详细信息

南京中国近代史遗址博物馆(总统府)建筑群,是我国社会转型时期的重要历史见证物,也是我国近代建筑史上科学性和民族性有机统一的范例。该建筑群的科学性,既表现为建筑式样的多元化,也表现为建筑结构、功能和材料的多样化,该建筑群的民族性,不仅体现在空间序列以中轴线为主体、左右对称的布局上,而且体现在建筑式样、色彩和材料的传承应用上,以及建筑造型的寓意上。该建筑群的科学性和民族性的对立统一,折射了在中莎文化碰撞背景下,国人对传统文化的尊崇和对西方文化的吸纳并行不悖的一种奇妙复杂的心理。

关键词：南京中国近代史遗址博物馆(总统府) 建筑群科学性民族性

基于多Agent混合智能实现个性化信息推荐

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高技术通讯 2001年第4期11卷 28-31页

作者：路海明卢增祥李衍达清华大学自动化系北京100084

在基于Agent的个性化网页推荐中 ,目前主要有两种过滤方法 :基于内容的过滤和基于多Agent合作的过滤。本文分析了单独使用这两种方法存在的不足 ,给出了结合两种方法优点的混合智能过滤算法 ,并通过网络Bookmark服务 ,给出了该算法的一... 详细信息

在基于Agent的个性化网页推荐中 ,目前主要有两种过滤方法 :基于内容的过滤和基于多Agent合作的过滤。本文分析了单独使用这两种方法存在的不足 ,给出了结合两种方法优点的混合智能过滤算法 ,并通过网络Bookmark服务 ,给出了该算法的一个实际应用系统 ,最后对该系统的运行结果进行了定性分析。

关键词：多Agent系统信息过滤合作过滤混合智能互联网信息推荐互联网