检索结果-南通市图书馆

Combined Multifactor Evidence of a Giant Lower-Mantle Ring Structure below the Eastern Mediterranean

Positioning 2020年第2期11卷 11-32页

作者： lev Eppelbaum Zvi Ben-Avraham Youri Katz Sierd Cloetingh Mikhail Kaban Department of Geosciences Faculty of Exact Sciences Tel Aviv University Ramat Aviv Tel Aviv Israel Steinhardt Museum of Natural History & National Research Center Faculty of Life Sciences Tel Aviv University Ramat Aviv Tel Aviv Israel Faculty of Geosciences Utrecht University TA Utrecht The Netherlands Helmholtz-Centre Potsdam GFZ German Research Centre for Geosciences Telegrafenberg Potsdam Germany Schmidt Institute of Physics of the Earth RAS Moscow Russia

In the Arabian-Northern African region, interaction of the Nubian, Arabian and Eurasian plates and many small tectonic units is conspicuous. In order to better understand this interaction, we use satellite derived gravity data (retracked to the Earth’s surface) recognized now as a powerful tool for tectono-geodynamic zonation. We applied the polynomial approximation to the gravity data which indicated the presence of a large, deep ring structure in the eastern Mediterranean centered below the Island of Cyprus. Quantitative analysis of residual gravity anomaly provides an estimate of the deep anomalous body’s upper edge at a depth of about 1700 km. Computations of the residual gravity anomalies for the lower mantle also indicate presence of anomalous sources. The GPS vector pattern coinciding with the gravity trend implies?counter clockwise rotation of this structure. Independent analyses of the geoid isolines map and seismic tomography data support the existence of a deep anomaly. Paleomagnetic data analysis from the surrounding regions confirms a?counter clockwise rotation. Numerous petrological, mineralogical, geodynamical and tectonic data suggest a relation between this deep structure and near-surface processes. This anomaly sheds light on a number of phenomena including the Cyprus gravity anomaly, counter clockwise rotation of the Mesozoic terrane belt and asymmetry of basins along continental transform faults.

关键词： Satellite Gravity Geodynamics Tectonics Paleomagnetism GPS Integrated Analysis

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

第二代液态电渣冶金技术的发展

引用

钢铁研究学报 2013年第3期25卷 1-7页

作者：姜周华 lev Medovar Ganna Stovpchenko 董艳伍臧喜民刘福斌东北大学材料与冶金学院辽宁沈阳110819 乌克兰巴顿电焊研究所乌克兰基辅03150

描述了基于导电结晶器的第二代液态电渣冶金技术的原理、特点和应用情况,主要包括液态电渣浇注实心锭、空心锭和复合轧辊。同时,介绍了采用液态电渣浇注技术制备双金属耐腐蚀钢筋和铜钢复合电极的试验结果。最后,对今后的发展提出了展望... 详细信息

描述了基于导电结晶器的第二代液态电渣冶金技术的原理、特点和应用情况,主要包括液态电渣浇注实心锭、空心锭和复合轧辊。同时,介绍了采用液态电渣浇注技术制备双金属耐腐蚀钢筋和铜钢复合电极的试验结果。最后,对今后的发展提出了展望,指出液态电渣浇注技术与连铸工艺的结合将是今后的发展趋势,并提出了液态电渣多次多层复合法制备特大型钢锭的可行性。

关键词：电渣冶金导电结晶器液态金属浇注发展

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

质量的概念

引用

物理 1990年第12期19卷 714-719页

作者： lev B.Okun 郭奕玲沈慧君苏联莫斯科理论与实验物理研究所基本粒子理论实验室

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

Studying of Diffusion of the Titan in Corundum Ceramics

引用

Materials Sciences and Applications 2011年第7期2卷 946-949页

作者： Vladimir Gurin lev Derkachenko Marcus Schmidt Ulrich Burkhardt Juri Grin 不详

For increase in hardness (durability) and fire resistance (stability to melts metals) corundum ceramics on the basis of Al2O3 authors of the present work have suggested to protect for the first time its surface stronger and fire-resistant coverings, for example, from TiB2. In work results of high-temperature diffusion TiB2 in a surface of plates from Al 2O3 are shown. For the first time the method cathodeluminescencium (KL) for identification and a condition of atom Ti after diffusion is used, in for an establishment of its quantity used method X-ray spectrum the microanalysis (RSMA). Durability increase defined a method microindentification by means of a pyramid of Knoop and strength at a bend. Researches have shown perspectivity of hardening of a surface corundum ceramics and use of the above-stated methods for studying of results of diffusion.

关键词： Corundum Ceramics Covering from Titanium Diboride Catodeluminescencium

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

Associations of Adolescence Exposure to Industrial Air Pollution with Cancer in Young Adults

引用

Environment & Health 2023年第1期1卷 53-62页

作者： Ruth lev Bar-Or Yuval Gilad Twig David M.Broday Lital Keinan-Boker Ora Paltiel Ronit Sinnreich Dorit Tzur Estela Derazne Raanan Raz Braun School of Public Health and Community Medicine The Hebrew University of JerusalemHadassahJerusalem 9112102Israel Faculty of Civil and Environmental Engineering Technion Israel Institute of TechnologyHaifa 32000Israel Technion Center of Excellence in Exposure Sciences and Environmental Health(TCEEH) Haifa 3200003Israel Israel Defense Forces Medical Corps Ramat Gan 5262000Israel Department of Preventive Medicine School of Public HealthSackler Faculty of MedicineTel Aviv UniversityTel Aviv 6997801Israel Institute of Endocrinology and The Gertner Institute for Epidemiology&Health Policy Research Sheba Medical CenterRamat Gan 5262000Israel Israel Center for Disease Control Israel Ministry of HealthSheba Medical CenterRamat Gan 5262000Israel School of Public Health University of HaifaHaifa 3498838Israel Department of Hematology Hadassah Medical OrganizationJerusalem 9112001Israel

There is substantial public concern about the health risks of proximity to petrochemical *** the Haifa Bay Area(HBA),which contains Israel’s densest industrial area,these concerns have been strengthened by elevated cancer mortality rates since the late *** studied the association between adolescent exposure to industrial air pollution in the HBA and adult-onset *** is a historical cohort *** study population comprised 2,187,317 subjects,using the Israeli medical corps data linked to the Israel National Cancer Registry with follow-up of up to 45 *** assessments were estimated by a spatial kriging interpolation model of SO2,serving as a marker for the dispersion of air pollution emitted from the complex during the study *** found increased crude(HR=1.23,95%CI=1.17 to 1.29)and adjusted(HR=1.16,95%CI=1.10 to 1.21)risk of cancer with increased exposure to air pollution in *** associations remained robust in analyses stratified by decade and socio-economic *** found evidence of monotonically increased risk in five of 13 cancer categories(leukemia,melanoma,female breast,central nervous system,and thyroid tumors).Our findings strengthen the hypothesis that this exposure posed a carcinogenic risk during the study period.

关键词： cancer Haifa Bay Area epidemiology public health industrial air pollution

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

Tunable order in colloids of hard magnetic hexaferrite nanoplatelets

引用

Nano Research 2022年第2期15卷 898-906页

作者： Artem A.Eliseev lev A.Trusov Evgeny O.Anokhin Andrei P.Chumakov Vladimir V.Korolev Anastasia E.Sleptsova Peter Boesecke Vladimir Ya.Shur Vladimir YaShur Pavel E.Kazin Andrei A.Eliseev Faculty of Chemistry Moscow State UniversityLeninskie Gory lb3Moscow 119991Russia Department of Materials Science MSU-BIT UniversityShenzhen 517182China Faculty of Materials Science Moscow State UniversityLeninskie Gory lb73Moscow 119991Russia European Synchrotron Radiation Facility Avenue des Martyrs 71Grenoble 38043France School of Natural Sciences and Mathematics Ural Federal UniversityLenin Ave 51Ekaterinburg 620000Russia

Structural ordering in the concentrated magnetic colloids containing 50×5 nm hard magnetic disc-like SrFe_(12)O_(19) nanoparticles was investigated by cryogenic scanning electron microscopy,optical microscopy,magnetic measurements,and small-angle X-ray *** was revealed that macroscopically homogeneous magnetic liquid consists of dynamic threads of stacked *** threads align into quasiperiodic arrays with the distances between individual threads of a few *** also can form pseudodomain structures with -90°domain boundaries realized through T-type thread *** effects of magnetic attraction and electrostatic repulsion on the equilibrium interplatelet distance in the threads were *** was demonstrated that this distance can be tuned by the control of the particles charge and electric double layer screening from Stern layer thickness(-1 nm)to tens of *** was shown that the permanent magnetic field is not able to cause any structural changes in the ordered magnetic liquid phase,while alternating field draws particles apart by their *** variation of interparticle distance up to 6%was achieved using an alternating magnetic field of low *** data were complemented by the theoretical models of screened electrostatic interactions between spherical and platelike magnetic *** last model provides good predictive power and correlates with the experimental *** stabilization energy of the condensed phase in the order of 1-10 kBT was derived from the *** approach allows controlling of an equilibrium interparticle distance and interparticle distance distribution by adjusting the magnetization and surface charge of the particles as well as the ionic strength of the solvent.

关键词： hexaferrite ferrofluid self-assembly colloidal solution

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

Practical obstacles and their mitigation strategies in compressional optical coherence elastography of biological tissues

引用

Journal of Innovative Optical Health Sciences 2017年第6期10卷 51-63页

作者： Vladimir Y.Zaitsev Alexandr L.Matveyev lev A.Matveev Ekaterina V.Gubarkova Alexandr A.Sovetsky Marina A.Sirotkina Grigory V.Gelikonov Elena V.Zagaynova Natalia D.Gladkova Alex Vitkin Institute of Applied Physics Russian Academy of Sciences Ulyanova Street 46 Nizhny Novgorod 603950 Russia Nizhny Novgorod State Medical Academy 10/1 Minina Square Nizhny Novgorod 603005 Russia University of Toronto and University Health Network 610 University Avenue Toronto ON M5G 2M9Canada

In this paper,we point out some practical obstacles arising in realization of compressional optical coherence elastography(OCE)that have not attracted sufficient attention ***-cally,we discuss(i)complications in quantification of the Young modulus of tissues related to partial adhesion between the OCE probe and soft intervening reference layer sensor,(i)distorting influence of tisue suface curvature/corrugation on the subsurface strain distri-bution mapping,(ii)ways of signal-to-noise mtio(SNR)enhancement in OCE strain mapping when periodic averaging is not realized,and(iv)potentially significant infuence of tissue elastic nonlinearity on quantification of its *** pnactical approaches to mitigate the effects of these complications are also described.

关键词： Optical coherence elastography optical coherence tomography phase-resolved methods strain mapping stiffness characterization

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

Influence of Low-Frequency Sonolysis on the Stability of Reactions Involving Associates

引用

Journal of Applied Mathematics and Physics 2019年第12期7卷 2950-2957页

作者： Tatiana P. Kulagina lev P. Smirnov Zoya S. Andrianova Institute of Problems of Chemical Physics Russian Academy of Sciences Chernogolovka Moscow Russia

The influence of low-frequency sonolysis on the kinetics bimolecular liquid-phase reactions was studied with due regard for the association (dimers and trimers) of starting reagents. The mathematical modeling of chemical reactions that were described by nonlinear differential equations is performed. The steady states, the singular points characteristics, the nature of concentration oscillations in the reaction system are described. With increasing frequency and amplitude of low-frequency sonic waves (up to some critical value), we observed the cessation of the reaction. This observation offers an additional tool for controlling reaction rate by the external action of low-frequency vibrations. The conclusions of the work are obtained under certain assumptions. The exact determination of the critical conditions for changes in dynamics is beyond the scope of the problem.

关键词： Chemical Reaction Kinetics Liquid Medium Reagent Association Low-Frequency Action Bistability Regime Oscillation Resonant Change

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

隐私、安全和信任

引用

数字图书馆论坛 2008年第3期 33-48页

作者： lev Grossman 不详

今天的社会因特网上,人们从事网上活动的种类和数量越来越多,从网上购物到博客、网上约会和社会交际.许多活动要求参与者与素味平生的人和机构分享他们自己的信息.随着因特网用户与数十人、往往是数百人建立'友谊',新的社区规则开始形成。

关键词：安全因特网用户网上约会网上活动网上购物种类友谊信息社区机构规则博客

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

Quantum Nature of Distortion and Delay of Satellite Signals II

引用

Positioning 2018年第3期9卷 47-72页

作者： Gennady V. Golubkov Michael I. Manzhelii lev V. Eppelbaum Semenov Institute of Chemical Physics of RAS Moscow Russia National Research Center “Kurchatov Institute” Moscow Russia Department of Earth Sciences Tel Aviv University Tel Aviv Israel

A detailed analysis of the influence of Rydberg states to the behavior of GPS satellite signals in the D and E atmospheric layers has been carried out. It is demonstrated that these states are the main reason for the GPS signal distortion. It is shown that the behavior of satellite signals is associated with the spectral characteristics of the UHF radiation of the Rydberg states depending on the geomagnetic conditions of ionosphere. The foundations of the quantum theory of distortion and delay of GPS satellite signal propagation through D and E atmospheric layers are analyzed and expounded. The problem reduces to the resonant scattering of photons, moving in the electromagnetic field of the signal, to the Rydberg complexes populated in a two-temperature non-equilibrium plasma. The processes of creation of additional photons because of stimulated emission and resonance scattering of photons are considered. In the present work, the quantum theory of the propagation of a satellite signal in the Earth’s upper atmosphere, firstly earlier proposed by the same authors, is described in detail. The general problems of the theory and possible theoretical and applied consequences are discussed. It is explained that two main processes occurring here, are directly related to the resonant quantum properties of the propagation medium. The first process leads to a direct increase in the power of the received signal, and second—to a shift in the signal carrier frequency??and the time delay??of its propagation. The main reasons of the processes are scattering of the Rydberg electron by the ion core and presence of the neutral medium molecule in the intermediate autoionization states of the composite system populated by the strong non-adiabatic coupling of electron and nuclear motions. The main purposes of our investigation are the physical justification of the formation of parameters ?and??using the quantum dynamics of the electron behavior in the intermediate state of the Rydberg co

关键词： D and E Atmospheric Layers l Mixing Rydberg Complex Satellite Radio Signal Electromagnetic Field Resonant Photon Scattering Distortion and Delay of Satellite Signal

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

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：