检索结果-南通市图书馆

Evidences of the expanding Earth from space-geodetic data over solid land and sea level rise in recent two decades

在线全文

学校读者我要写书评

暂无评论

Geodesy and Geodynamics 2015年第4期6卷 248-252页

作者： shen Wenbin shen Ziyu sun Rong Barkin yuri Department of Geophysics School of Geodesy and GeomaticsKey Laboratory of Geospace Environment and Geodesy of Ministry of EducationWuhan University state Key Laboratory of Information Engineering in surveying Mapping and Remote SensingWuhan University school of Physics Huazhong University of Science and Technology sternberg Astronomical Institute Moscow State University

According to the space-geodetic data recorded at globally distributed stations over solid land spanning a period of more than 20-years under the International Terrestrial Reference Frame 2008,our previous estimate of the average-weighted vertical variation of the Earth＇s solid surface suggests that the Earth＇s solid part is expanding at a rate of 0.24 ± 0.05 mm/a in recent two *** another aspect,the satellite altimetry observations spanning recent two decades demonstrate the sea level rise（sLR） rate 3.2 ± 0.4 mm/a,of which1.8 ± 0.5 mm/a is contributed by the ice melting over *** study shows that the oceanic thermal expansion is 1.0 ± 0.1 mm/a due to the temperature increase in recent half century,which coincides with the estimate provided by previous *** sLR observation by altimetry is not balanced by the ice melting and thermal expansion,which is an open problem before this ***,in this study we infer that the oceanic part of the Earth is expanding at a rate about 0.4 mm/*** the expansion rates of land part and oceanic part,we conclude that the Earth is expanding at a rate of 0.35 ± 0.47 mm/a in recent two *** the Earth expands at this rate,then the altimetry-observed sLR can be well explained.

关键词： ITRF2008 coordinates Ice melting Thermal expansion Earth expansion sea level rise (sLR)space-geodetic data Velocities altimetry Earth's solid surface

Emerging Noninvasive Neurostimulation Technologies: CN-NINM and sYMPATOCORECTION

在线全文

学校读者我要写书评

暂无评论

Journal of Behavioral and Brain science 2014年第3期4卷 105-113页

作者： yuri P. Danilov Vladimir s. Kublanov Research Medical and Biological Engineering Center of High Technologies Institute of Radio Engineering and Information Technology Ural Federal University Mira Str. 32 Ekaterinburg Russia Tactile Communication and Neuromodulation Laboratory Biomedical Engineering Department University of Wisconsin-Madison 1550 Engineering Drive Madison USA

Two emerging noninvasive neurostimulation technologies, based on electrocutaneius stimulation of the tongue (CN-NINM) and the neck (sYMPATOCORRECTION) are presented. Currently, two portable devices were developed and introduced in clinical practice: PoNsTM (portable neurostimulator) and sYMPATOCOR. Both technologies are complement each other and demonstrate perspectives in various applications for purpose of neurorehabilitation and neurological symptoms management in such difficult rehabilitation areas, as traumatic brain injury, stroke, Parkinson’s disease, multiple sclerosis and many other neurological disorders.

关键词： Neurostimulation Neurorehabilitation Noninvasive Medical Device

Polariton polarization rectifier

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(science & Applications) 2019年第1期8卷 505-514页

作者： Evgeny s.sedov yuri G.Rubo Alexey V.Kavokin Westlake University 18 Shilongshan RoadHangzhou 310024 Zhejiang ProvinceChina Institute of Natural sciences Westlake Institute for Advanced Study18 Shilongshan RoadHangzhou 310024 Zhejiang ProvinceChina Vladimir state University Gorky str.87Vladimir 600000Russia Instituto de Energias Renovables Universidad Nacional Autonoma de Mexico62580 TemixcoMORMexico spin Optics Laboratory Saint Petersburg State University1 UlianovskayaSt.Petersburg 198504Russia

We propose a novel photonic device,the polariton polarization rectifier,intended to transform polariton pulses with arbitrary polarization into linearly polarized pulses with controllable orientation of the polarization *** is based on the interplay between the orbital motion of the polariton wave packet and the dynamics of the polariton pseudospin governed by the spatially dependent effective magnetic *** latter is controlled by the TE-TM splitting in a harmonic *** show that the unpolarized polariton pulse acquires linear polarization in the course of propagation in a harmonic *** gives the considered structure an extra function as a linear polarizer of polariton pulses.

关键词： field polarized harmonic

Highly efficient gene silencing and bioimaging based on fluorescent carbon dots in vitro and in vivo

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2017年第2期10卷 503-519页

作者： seongchan Kim yuri Choi Ginam Park Cheolhee Won Young-Joon Park Younghoon Lee Byeong-su Kim DaI-Hee Min Center for RNA Research Institute for Basic Sciences (IBS) Department of Chemistry Seoul National University Seou108826 Republic of Korea Department of Energy Engineering and Department of Chemistry Ulsan National Institute of Science and Technology (UNIST) Ulsan 44919 Republic of Korea Institute of Nanobio Convergence Technology Lemonex Inc. Seou108826 Republic of Korea College of Pharmacy Ajou University Worldcuplo 206 Yeongtong-gu Suwon 16499 Republic of Korea Department of Chemistry Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea

small interfering RNA （siRNA） is an attractive therapeutic candidate for sequence- specific gene silencing to treat incurable diseases using small molecule drugs. However, its efficient intracellular delivery has remained a challenge. Here, we have developed a highly biocompatible fluorescent carbon dot （CD）, and demonstrate a functional siRNA delivery system that induces efficient gene knockdown in vitro and in vivo. We found that CD nanoparticles （NPs） enhance the cellular uptake of siRNA, via endocytosis in tumor cells, with low cytotoxicity and unexpected immune responses. Real-time study of fluorescence imaging in live cells shows that CD NPs favorably localize in cytoplasm and successfully release siRNA within 12 h. Moreover, we demonstrate that CD NP-mediated siRNA delivery significantly silences green fluorescence protein （GFP） expression and inhibits tumor growth in a breast cancer cell xenograft mouse model of tumor-specific therapy. We have developed a multifunctional siRNA delivery vehicle enabling simultaneous bioimaging and efficient downregulation of gene expression, that shows excellent potential for gene therapy.

关键词： bioimaging carbon dot gene delivery RNA interference targeted cancer therapy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

植被冠层立体结构与叶片倾角的偏振光效应

遥感学报 2018年第6期22卷 935-946页

作者：杨彬晏磊 yuri Knyazikhin 刘思远湖南大学电气与信息工程学院长沙410082 北京大学空间信息集成与3s工程应用北京市重点实验室北京100871 北京大学地球与空间科学学院遥感与地理信息系统研究所北京100871 波士顿大学地球与环境系波士顿MA02215

植被偏振特性研究对于植被监测与组分定量反演具有极其重要的作用。植被冠层的反射辐射具有偏振特性,这种特性与入射辐射和植被冠层结构相关。本文分析了偏振对光子—叶片—冠层之间细微相互作用及其变化的有效探测能力,并利用研究型扫... 详细信息

植被偏振特性研究对于植被监测与组分定量反演具有极其重要的作用。植被冠层的反射辐射具有偏振特性,这种特性与入射辐射和植被冠层结构相关。本文分析了偏振对光子—叶片—冠层之间细微相互作用及其变化的有效探测能力,并利用研究型扫描式偏振辐射仪RsP(Research scanning Polarimeter)数据系统对比分析了偏振对不同叶倾角分布的估测。通过上述研究得出以下结论:(1)偏振观测能够对光线在冠层立体结构中的透射反射再出射过程给出精细刻画,若不用偏振手段对这一过程进行甄别并去除,则直接测算的植被散射系数会产生高达140%的误差;(2)利用偏振手段可以为高精度大倾角、多时相遥感观测提供可能,以此可改变目前光学遥感小角度、垂直观测的较严格约束;(3)偏振辐射呈现出随波长的稳定特性(相关系数>0.96),使得利用偏振手段可以更好地研究冠层结构;(4)不同叶倾角分布对入射辐射存在不同的偏振反射,为利用多角度偏振信息进行遥感植被精细分类提供了新的途径。本文详细描述冠层结构和植被偏振特性的相互作用,通过对冠层立体结构与叶倾角的研究,刻画了植被定量遥感的方向性信息与高精度实现,为高分辨率遥感定量化的有效信息挖掘提供了新手段。

关键词：入射观测几何冠层立体结构叶倾角偏振光效应 RsP 高分辨率遥感

X-波段电子顺磁共振的微观有序宏观无序谱分析

在线全文

学校读者我要写书评

暂无评论

光谱学与光谱分析 2007年第2期27卷 209-212页

作者：吴雪 Edmund Howard yuri Nesmelov David D Thomas 南开大学物理学院南开大学生物活性材料教育部重点实验室天津300071 Department of Biochemistry Molecular Biology and BiophysicsUniversity of Minnesota

相关时间和序参量是表征自旋探针标记大分子运动与分布的两个重要参数。用合适的物理模型,通过线型分析同时确定这些参数在电子顺磁共振谱的解析中非常有意义。文章应用微观有序宏观无序(MO-MD)模型,在X-波段对具有轴对称磁参量自旋探针... 详细信息

相关时间和序参量是表征自旋探针标记大分子运动与分布的两个重要参数。用合适的物理模型,通过线型分析同时确定这些参数在电子顺磁共振谱的解析中非常有意义。文章应用微观有序宏观无序(MO-MD)模型,在X-波段对具有轴对称磁参量自旋探针的EPR谱进行了模拟计算,测量了波形的实验参数,比较了与经验公式分析的误差。对于MOMD谱,作者提出了分辨标准来筛选实验参数进行线型分析,以此确定了同时解析相关时间及内部序参量的有效区间。

关键词： EPR模拟 MOMD模型相关时间序参量

Tunable chemical complexity to control atomic diffusion in alloys

在线全文

学校读者我要写书评

暂无评论

npj Computational Materials 2020年第1期6卷 1360-1367页

作者： yuri Osetsky Alexander V.Barashev Laurent K.Béland Zhongwen Yao Keyvan Ferasat Yanwen Zhang Materials science and Technology Division Oak Ridge National LaboratoryOak RidgeTN 37831USA Department of Nuclear Engineering and Radiological sciences University of MichiganAnn ArborMI 48109USA Department of Mechanical and Materials Engineering Queen’s UniversityKingstonON K7L 3N6Canada Department of Materials science and Engineering University of TennesseeKnoxvilleTN 37996USA

In this paper we report a new fundamental understanding of chemically-biased diffusion in Ni–Fe random alloys that is tuned/controlled by the intrinsic quantifiable chemical *** of radiation-tolerant alloys has been a long-standing *** we show how intrinsic chemical complexity can be utilized to guide the atomic diffusion and suppress radiation *** influence of chemical complexity is shown by the example of interstitial atom(IA)diffusion that is the most important defect in radiation *** useμs-scale molecular dynamics to reveal sluggish diffusion and percolation of IAs in concentrated Ni–Fe *** develop a mean field diffusion model to take into account the effect of migrating defect energy properties on diffusion percolation,which is verified by a new kinetic Monte Carlo approach addressing detailed *** demonstrate that the local variations in the ground state energy of IA configurations in alloys,reflecting the chemical difference between alloying components,drives the percolation effects for atomic ***,chemically-biased and sluggish diffusion are phenomena that are directly related to the chemical complexity intrinsically to multicomponent alloys.

关键词： alloys alloying diffusion

sediment transport under the presence and absence of emergent vegetation in a natural alluvial channel from Brazil

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of sediment Research 2016年第4期31卷 360-367页

作者： yuri Jacques Agra Bezerra da silva José Ramon Barros Cantalice Vijay P.singh Cinthia Maria Cordeiro Atanázio Cruz Wagner Luís da silva souza soil Conservation Engineering Laboratory Rural Federal University of Pernambuco(UFRPE) Brazil Department of Biological and Agricultural Engineering Texas A & M University College Station

studies regarding the influence of emergent vegetation on sediment transport are scarce and have mainly focused on flume *** fill this gap and also meet the international need,we aimed to evaluate the influence of emergent vegetation(Echinodorus macrophyllus) on sediment transport of Capibaribe River,*** and suspended sediment measurements were carried out using the Us BLH 84 and Us DH 48 samplers,*** of stem diameter,stem spacing and plant density were performed in conjunction with flow and sediment field *** on our results,0.45 m swas the threshold of mean flow velocity supported by *** under field *** value can be helpful for other rivers with gravel-bed river to armoured layer ratio(AR=D)/D=12.50)-natural conditions observed in Capibaribe River-or where the vegetation can provide positive effects,such as increase the bed stability,assist water restoration/rehabilitation and decrease water *** results can hopefully be used in engineering practice and ecosystem *** general,both the drag coefficient and drag force varied inversely and directly with the mean flow velocity and vegetation density,*** vegetation resistance force was inversely proportional to the bedload transport owing to the resistance caused by emergent *** finding was supported by the clear decoupling between nonvegetated and emergent vegetated conditions indicated by cluster *** study results provided a reasonable understanding of the interaction between emergent vegetation,water flow and sediment transport in the Capibaribe River.

关键词： Vegetation drag force Vegetation drag coefficient Plant Reynolds number Hierarchical cluster analysis and principal component analysis

Optical properties and phase-matching in LiIns2

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics Letters 2003年第4期1卷 237-240页

作者：黄金哲任德明胡孝勇曲彦臣 yuri Andreev Pavel Geiko Anna shaiduko sergey Grechin Institute of Opto-Electronics Harbin Institute of TechnologyHarbin 150001 Institute of Optical Monitoring sB RAs Tomsk 634055 Russia sRIRL Bauman Moscow State Technical University Moscow 107005 Russia

Investigation results on linear and non-linear optical properties, damage threshold and potential efficiencies of biaxial negative LiIns2 crystal are represented. It shows that the crystal has phase-matching and group-velocity matching in wide spectral range for second harmonic, sum- and difference-frequency generation of visible, near and middle IR lasers. The possibilities of designing middle IR optical parametric oscillator (OPO) pumped by Nd:YAG and dye lasers and specially possibility of frequency conversion with 3 um range femtosecond erbium lasers are given.

关键词： Crystals Optical frequency conversion Optically pumped lasers