检索结果-南通市图书馆

Features of ^(90)Sr behavior in Crimean lakes with different salinity of their water environment

Acta Geochimica 2023年第1期42卷 89-102页

作者： n.Yu.Mirzoeva S.I.Arkhipova V.Yu.Proskurnin o.n.miroshnichenko I.n.Moseichenko A.o.Kovalevsky Institute of Biology of the Southern Seas of RAS SevastopolRussian Federation

The comparative study of technogenic ^(90)Sr behavior features in Crimea lakes’ ecosystems with different levels of salinity was carried out in *** sources of ^(90)Sr input were identified for all the studied lakes:the primary source concerned with atmospheric fallout immediately after the Chernobyl nPP accident and the secondary long-term input of this radionuclide by *** half-life of the ^(90)Sr concentration in the water of the hypers aline Lake Sasyk-Sivash was estimated to vary from 0.8 to 1.1 years after the closure of the north Crimean Canal(nCC).Biogeochemical processes in the lake under the absence of the secondary source of the radionuclide input were shown to decrease in the ^(90)Sr residence time in the water column by 131 *** brackish water bodies,a significant factor influencing the radionuclide concentration in ecosystems of lakes was the pH of their water,while for hypers aline lakes the level of water salinity was the main factor determining ^(90)Sr *** concentration of ^(90)Sr in bottom sediments of studied lakes depended mainly on this radionuclide concentration in a water *** ^(90)Sr distribution factors(Kd) for studied lakes’ bottom sediments varied in a range of n·10^(0)÷n·10^(2) for hypersaline lakes and of n·10^(1)÷n·10^(2) for lakes with brackish *** to the closure of the nCC,the ^(90)Sr redistribution took place in lake ecosystems only under the geochemical processes within the water bodies *** results obtained in this work are of particular importance as a starting point or a basis for further radioecological studies of the Crimean inland waters after the reopening of the nCC and the Dnieper waters re-entering the territory of Crimea in 2022after the 8 years of their absence.

关键词： ^(90)Sr Salt lakes Water Bottom sediments Chernobyl nPP accident Crimea

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

Proton activity of the Sun in current solar cycle 24

引用

Research in Astronomy and Astrophysics 2015年第7期15卷 1036-1044页

作者： Chuan Li Leonty I.miroshnichenko Cheng Fang School of Astronomy & Space Science Nanjing University Key Laboratory for Modern Astronomy and Astrophysics (nanjing University) Ministry of Education n.V.Pushkov Institute of Terrestrial Magnetism Ionosphere and Radio Wave Propagation(IZMIRAN) Russian Academy of Sciences D.V.Skobeltsyn Institute of nuclear Physics (SInP) M.V.Lomonosov Moscow State University

We present a study of seven large solar proton events in the current solar cycle 24（from 2009 January up to the current date）. They were recorded by the GoES spacecraft with the highest proton fluxes being over 200 pfu for energies 〉10 Me V. In situ particle measurements show that：（1） The profiles of the proton fluxes are highly dependent on the locations of their solar sources, namely flares or coronal mass ejections（CMEs）, which confirms the ＂heliolongitude rules＂ associated with solar energetic particle fluxes;（2） The solar particle release（SPR） times fall in the decay phase of the flare emission, and are in accordance with the times when the CMEs travel to an average height of 7.9 solar radii; and（3） The time differences between the SPR and the flare peak are also dependent on the locations of the solar active regions. The results tend to support the scenario of proton acceleration by the CME-driven shock,even though there exists a possibility of particle acceleration at the flare site, with subsequent perpendicular diffusion of accelerated particles in the interplanetary magnetic field. We derive the integral time-of-maximum spectra of solar protons in two forms： a single power-law distribution and a power law roll-over with an exponential tail. It is found that the unique ground level enhancement that occurred in the event on 2012 May 17 displays the hardest spectrum and the largest roll-over energy which may explain why this event could extend to relativistic energies.

关键词： acceleration of particles -- Sun: flares -- Sun: coronal mass ejections

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

Broadband infrared imaging governed by guidedmode resonance in dielectric metasurfaces

引用

Light(Science & Applications) 2024年第11期13卷 2599-2610页

作者： Ze Zheng Daria Smirnova Gabriel Sanderson Ying Cuifeng Demosthenes C.Koutsogeorgis Lujun Huang Zixi Liu Rupert oulton Arman Yousefi Andrey E.miroshnichenko Dragomir n.neshev Mary o’neill Mohsen Rahmani Lei Xu Advanced optics and Photonics Laboratory Department of EngineeringSchool of Science&TechnologyNottingham Trent UniversityNottingham NG118NSUK ARC Centre of Excellence for Transformative Meta-optical Systems(TMoS) Research School of PhysicsThe Australian National UniversityCanberraACT 2601Australia School of Science&Technology Nottingham Trent UniversityNottingham NG118NSUK School of Physics and Electronic Science East China Normal UniversityShanghai 200241China School of Physics Nankai UniversityTianjin 300071China Department of Physics Imperial College LondonLondon SW72BWUK School of Engineering and Technology University of New South WalesCanberraACT 2600Australia

nonlinear metasurfaces have experienced rapid growth recently due to their potential in various applications,including infrared imaging and ***,due to the low conversion efficiencies of metasurfaces,several strategies have been adopted to enhance their performances,including employing resonances at signal or nonlinear emission *** strategy results in a narrow operational band of the nonlinear metasurfaces,which has bottlenecked many applications,including nonlinear holography,image encoding,and nonlinear ***,we overcome this issue by introducing a new nonlinear imaging platform utilizing a pump beam to enhance signal conversion through four-wave mixing(FWM),whereby the metasurface is resonant at the pump wavelength rather than the signal or nonlinear *** a result,we demonstrate broadband nonlinear imaging for arbitrary objects using metasurfaces.A silicon disk-on-slab metasurface is introduced with an excitable guided-mode resonance at the pump *** enabled direct conversion of a broad IR image ranging from>1000 to 4000 nm into ***,adopting FWM substantially reduces the dependence on high-power signal inputs or resonant features at the signal beam of nonlinear imaging by utilizing the quadratic relationship between the pump beam intensity and the signal conversion *** results,therefore,unlock the potential for broadband infrared imaging capabilities with metasurfaces,making a promising advancement for next-generation all-optical infrared imaging techniques with chip-scale photonic devices.

关键词： utilizing resonant governed

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

Lignite oxidative desulphurization: notice 3-process technological aspects and application of products

引用

International Journal of Coal Science & Technology 2019年第1期6卷 63-73页

作者： Volodymyr Gunka Mariia Shved Yuriy Prysiazhnyi Serhiy Pyshyev Denis miroshnichenko Lviv Polytecnic national University 12 Bandery Str. L'viv 79013Ukraine national Technical University “Kharkiv Polytechnic Inslilute” 2 Kyrpychova Str.Kharkiv 61002Ukraine

The study reviews the process of oxidative desulphurization of high-sulphur Ukrainian lignite, which was performed by coal treatment using an air or air-steam mixture. In the process. sulphur-free fuel and tar from the decomposition of coal organic matter was obtained. Hence, the sulphur in the coal was converted inlo hydrogen sulphide. The coal desulphurization process is critical to power generatio n. power generation and technology, and tech no logy field of application. The coal desulphurization process ensures the maximum recovery of the highest content of sulphur and hydrogen sulphide (H2S) in desulphurized gases at minimal energy costs. The process also enhances the maximum decomposition of tar and sulphur recovery (> 50%) during coal power generation. Based on smnniarized field studies, a block schematic diagram coupled with heat and material balances of the process was developed for the calculations. The application of the tech no logy at the first stage of coal combustion in thermal power plants will en able the utilizatio n of over 50% of recovered coal sulphur in the form of concentrated H2S or commercial elemental sulphur. This will, nevertheless, allow for a reduction of sulphur oxide pollution in the environment by at least 53%-56%. It has been suggested that the product of thermal decomposition of coal organic matter (tar) can be used as a componenl of fumace fuel oil or as a plasticizer of petroleum-based road bitumen.

关键词： Lignite oxidative desulphurization Sulphur Hydrogen sulphide

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

Thermosensitive and Wound-Healing Gelatin-Alginate Biopolymer Hydrogels Modified with Humic Acids

引用

Journal of Renewable Materials 2024年第10期12卷 1691-1713页

作者： Denis miroshnichenko Vladimir Lebedev Katerina Lebedeva Anna Cherkashina Sergey Petrushenko olena Bogoyavlenska Anzhela olkhovska Ihor Hrubnyk Liudmyla Maloshtan natalja Klochko The Department of oil Gas and Solid Fuel Refining TechnologiesNational Technical University«Kharkiv Polytechnic Institute»Kharkiv61002Ukraine The Department of Plastics and Biologically Active Polymers Technology National Technical University«Kharkiv Polytechnic Institute»Kharkiv61002Ukraine Faculty of Physics V.N.Karazin Kharkiv National UniversityKharkiv61000Ukraine Technical University of Liberec Liberec46117Czech Republic The Department of organizations and Management Healthcare and Social Medicine National Technical University«Kharkiv Polytechnic Institute»Kharkiv61002Ukraine The Common Pharmacy Department National Technical University«Kharkiv Polytechnic Institute»Kharkiv61002Ukraine Department of Micro-and nanoelectronics National Technical University«Kharkiv Polytechnic Institute»Kharkiv61002Ukraine

The main goal of the article is the creation and study of thermosensitive and wound-healing gelatin-alginate bio-polymer hydrogels modified with humic *** rheological properties,swelling and contraction behavior were experimentally investigated,elucidated using Fourier transform infrared spectroscopy and used to achieve the physiological melting point,which is necessary for successful drug *** has been shown that in the gelatin-alginate-humic acid biopolymer hydrogels systems,it is possible to obtain a gel-sol transition temperature close to the physiological temperature of 37℃,which is important for drug delivery in the treatment of *** changing the type and concentration of humic acids in the gelatin-alginate hydrogel,it turned out to be achiev-able to regulate the softening time of the gel on the human body in the range from 6 to 20 min,which provides the possibility of controlled prolonged delivery of *** on the study of the influence of calcium ions on the properties of humic acids and ion exchange,as well as the interaction of humic acids,sodium alginate and gelatin with the formation of tighter gel networks,approaches to regulate the rate of softening of hydrogels at physiological temperature and their swelling,which simulates the absorption of exudate,were proposed and *** addition,low shrinkage of the hydrogel surface due to cross-linking of gelatin-alginate networks when modified with humic acids was experimentally confirmed,which is important for avoiding problems of wound contracture and contour deformations when using dressings for wound ***,the developed opti-mized innovative biopolymer hydrogels synergistically combine the outstanding properties of natural molecular polymers and humic acids and are promising for the creation of effective medicines for wound healing.

关键词： Gelatin-alginate hydrogel humic acids wound healing rheological properties swelling thermosensitivity contraction

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

Effect of sodium injection rate in reduction process on characteristics of tantalum powders

引用

广东有色金属学报 2005年第2期15卷 329-331页

作者： orlov V.M. Kolosov V.n. Prokhorova T.Yu. miroshnichenko M.n. I .Tananaev Institute of Chemistry Kola Science Centre RAS Apatity 184209 Russia

The paper presents a research the effect of sodium injection rate in a melt containing potassium tantalum fluoride and a flux on morphology and characteristics of tantalum powders obtained by sodium reduction.

关键词：钠钽氟化物合金粉末

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

nonlinear frequency conversion in optical nanoantennas and metasurfaces:materials evolution and fabrication

引用

opto-Electronic Advances 2018年第10期1卷 1-12页

作者： Mohsen Rahmani Giuseppe Leo Igal Brener Anatoly V. Zayats Stefan A. Maier Costantino De Angelis Hoe Tan Valerio Flavio Gili Fouad Karouta Rupert oulton Kaushal Vora Mykhaylo Lysevych Isabelle Staude Lei Xu Andrey E. miroshnichenko Chennupati Jagadish Dragomir n. neshev Research School of Physics and Engineering The Australian National University Canberra ACT 2601 Australia Matériaux et Phénomènes Quantiques Université Paris Diderot-Sorbonne Paris Cité 10 rue A. Domon et L. Duquet 75013 Paris France Center for Integrated nanotechnologies Sandia National Laboratories Albuquerque New Mexico 87185 United States Department of Physics King’s College London Strand London WC2R 2LS United Kingdom The Blackett Laboratory Department of Physics Imperial College London London SW7 2AZ United Kingdom Chair in Hybrid nanosystems Nano Institute Munich Fakultat für Physik Ludwig-Maximilians-Universitat München München Germany Deptartment of Information Engineering Universitàdegli Studi di Brescia and INO-CNR Via Branze 38 25123 Brescia Italy Institute of Applied Physics Abbe Center of Photonics Friedrich Schiller University Jena 07745 Jena Germany School of Engineering and Information Technology University of New South Wales Canberra ACT 2600 Australia

nonlinear frequency conversion is one of the most fundamental processes in nonlinear *** has a wide range of applications in our daily lives,including novel light sources,sensing,and information *** is usually assumed that nonlinear frequency conversion requires large crystals that gradually accumulate a strong ***,the large size of nonlinear crystals is not compatible with the miniaturisation of modern photonic and optoelectronic ***,shrinking the nonlinear structures down to the nanoscale,while keeping favourable conversion efficiencies,is of great importance for future photonics *** the last decade,researchers have studied the strategies for enhancing the nonlinear efficiencies at the nanoscale,*** employing different nonlinear materials,resonant couplings and hybridization *** this paper,we provide a compact review of the nanomaterials-based efforts,ranging from metal to dielectric and semiconductor nanostructures,including their relevant nanofabrication techniques.

关键词： nonlinear nanophotonics metallic nanoantennas dielectric nanoantennas III-V semiconductor nanoantenna nanofabrication

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

Pushing the limit of high-Q mode of a single dielectric nanocavity

引用

Advanced Photonics 2021年第1期3卷 93-101页

作者： Lujun Huang Lei Xu Mohsen Rahmani Dragomir neshev Andrey E.miroshnichenko University of new South Wales School of Engineering and Information Technology nottingham Trent University School of Science and Technology Department of Engineering Advanced Optics and Photonics Laboratory The Australia national University Research School of Physics Department of Electronic Material Engineering ARC Centre of Excellence for Transformative Meta-Optical Systems (TMOS)

High-index dielectric resonators support different types of resonant modes. However, it is challenging to achieve a high-Q factor in a single dielectric nanocavity due to the non-Hermitian property of the open system. We present a universal approach of finding out a series of high-Q resonant modes in a single nonspherical dielectric cavity with a rectangular cross section by exploring the quasi bound-state-in-thecontinuum(QBIC). Unlike conventional methods relying on heavy brutal force computations(i.e., frequency scanning by the finite difference time domain method), our approach is built upon Mie mode engineering,through which many high-Q modes can be easily achieved by constructing avoid-crossing(or crossing) of the eigenvalue for pair-leaky modes. The calculated Q-factor of mode TE(5,7) can be up to Qtheory=2.3 × 104for a freestanding square nanowire(nW)(n = 4), which is 64 times larger than the highest Q-factor(Qtheory≈ 360)reported so far in a single Si disk. Such high-Q modes can be attributed to suppressed radiation in the corresponding eigenchannels and simultaneously quenched electric(magnetic) field at momentum *** a proof of concept, we experimentally demonstrate the emergence of the high-Q resonant modes[Q ≈ 211 for mode TE(3,4), Q ≈ 380 for mode TE(3,5), and Q ≈ 294 for mode TM(3,5)] in the scattering spectrum of a single silicon nW.

关键词： Mie resonance leaky mode quasi bound state in the continuum high-Q mode dielectric nanocavity

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

Third-harmonic generation and imaging with resonant Si membrane metasurface

引用

opto-Electronic Advances 2023年第8期6卷 18-27页

作者： Ze Zheng Lei Xu Lujun Huang Daria Smirnova Khosro Zangeneh Kamali Arman Yousefi Fu Deng Rocio Camacho-Morales Cuifeng Ying Andrey E.miroshnichenko Dragomir n.neshev Mohsen Rahmani Advanced optics and Photonics Laboratory Department of EngineeringSchool of Science&TechnologyNottingham Trent UniversityNottingham NG118NSUK School of Engineering and Information Technology University of New South WalesCanberra ACT 2600Australia School of Physics and Electronic Science East China Normal UniversityShanghai 200241China ARC Centre of Excellence for Transformative Meta-optical Systems(TMoS) Research School of PhysicsAustralian National UniversityCanberra ACT 2601Australia Department of Physics Hong Kong University of Science and TechnologyKowloonHong Kong SAR 999077China

Dielectric metasurfaces play an increasingly important role in enhancing optical nonlinear generations owing to their ability to support strong light-matter interactions based on Mie-type multipolar *** to metasurfaces composed of the periodic arrangement of nanoparticles,inverse,so-called,membrane metasurfaces offer unique possibilities for supporting multipolar resonances,while maintaining small unit cell size,large mode volume and high field enhancement for enhancing nonlinear frequency ***,we theoretically and experimentally investigate the formation of bound states in the continuum(BICs)from silicon dimer-hole membrane *** demonstrate that our BIC-formed resonance features a strong and tailorable electric near-field confinement inside the silicon membrane ***,we show that by tuning the gap between the holes,one can open a leaky channel to transform these regular BICs into quasi-BICs,which can be excited directly under normal plane wave *** prove the capabilities of such metasurfaces,we demonstrate the conversion of an infrared image to the visible range,based on the Third-harmonic generation(THG)process with the resonant membrane *** results suggest a new paradigm for realising efficient nonlinear photonics metadevices and hold promise for extending the applications of nonlinear structuring surfaces to new types of all-optical near-infrared imaging technologies.

关键词： nonlinear imaging third-harmonic generation bound states in the continuum membrane metasurfaces

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

Enhanced light-matter interactions in dielectric nanostructures via machine-learning approach

引用

Advanced Photonics 2020年第2期2卷 57-67页

作者： Lei Xu Mohsen Rahmani Yixuan Ma Daria ASmirnova Khosro Zangeneh Kamali Fu Deng Yan Kei Chiang Lujun Huang Haoyang Zhang Stephen Gould Dragomir n.neshev Andrey E.miroshnichenko University of new South Wales School of Engineering and Information TechnologyCanberraAustralia nottingham Trent University School of Science&TechnologyDepartment of EngineeringAdvanced Optics and Photonics LaboratoryNottinghamUnited Kingdom Australian national University Research School of PhysicsNonlinear Physics CentreCanberraAustralia Australian national University Research School of PhysicsARC Centre of Excellence for Transformative Meta-Optical Systems(TMOS)CanberraAustralia Queensland University of Technology School of Electrical Engineering and Computer ScienceBrisbaneQueenslandAustralia Australian national University College of Engineering and Computer ScienceCanberraAustralia

A key concept underlying the specific functionalities of metasurfaces is the use of constituent components to shape the wavefront of the light on *** are versatile,novel platforms for manipulating the scattering,color,phase,or intensity of ***,one of the typical approaches for designing a metasurface is to optimize one or two variables among a vast number of fixed parameters,such as various materials’properties and coupling effects,as well as the geometrical ***,this would require multidimensional space optimization through direct numerical ***,an alternative,popular approach allows for reducing the computational cost significantly based on a deep-learning-assisted *** utilize a deep-learning approach for obtaining high-quality factor(high-Q)resonances with desired characteristics,such as linewidth,amplitude,and spectral *** exploit such high-Q resonances for enhancedlight–matter interaction in nonlinearoptical metasurfaces and optomechanical vibrations,*** demonstrate that optimized metasurfaces achieve up to 400-fold enhancement of the third-harmonic generation;at the same time,they also contribute to 100-fold enhancement of the amplitude of optomechanical *** approach can be further used to realize structures with unconventional scattering responses.

关键词： machine learning dielectric nanostructures Fano resonance third-harmonic generation optoacoustics

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

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：