检索结果-南通市图书馆

Coseismic Effects of the 2011 Magnitude 9.0 Tohoku-Oki Earthquake Measured at Far East Russia Continental Coast by Gravity and GPS Methods

引用

International Journal of Geosciences 2013年第2期4卷 362-370页

作者： Vladimir Timofeev Ruslan Kulinich maxim valitov Yuri Stus Eugeniy Kalish Bernard Ducarme Pavel Gornov Dmitriy Ardyukov Igor Sizikov Anton Timofeev Gulshat Gil’manova Tatyana Kolpashikova Zoya Proshkina Institute of Petroleum Geology and Geophysics Siberian Branch of Russian Academy of SciencesNovosibirskRussia V.I.Il’ichev Pacific Oceanological Institute Far Eastern Branch of Russian Academy of ScienceVladivostokRussia Institute of Automatic and Electrometry Siberian Branch of Russian Academy of SciencesNovosibirskRussia Georges Lemaitre Centre for Earth and Climate Research Catholic University of LouvainLeuvenBelgium Institute of Tectonics and Geophysics Far Eastern Branch of Russian Academy of SciencesKhabarovskRussia

This work presents the results of complex gravity observation performed at Shults Cape, Gamov peninsula (42.58°N, 131.15°E), Russia. Absolute laser gravimeter GABL type and Scintrex type relative gravimeter were used for measurement. To investigate the accuracy of tidal corrections we compared the observed tidal parameters of the main tidal waves O1 and M2 with modeled ones computed from 6 different ocean tidal models: CSR4, FES02, FES04, GOT00, NAO99 and TPX06. After discussion a theoretical model based on TPX06 ocean tides model and DDW99 non hydrostatic body tides model was used for tidal correction of absolute gravity data. Preliminary estimate of gravity effect induced by the Tohoku-Oki earthquake of11 March 2011Mw = 9.0 at Primorye territory (Russia) was found to be 5.1 ± 2.0 μGal. Co-seismic crustal displacements revealed by GPS data at Far EastRussiacontinental coast are also investigated. Volumetric dilatation of this area is observed at +1.7 × 10-8 level.

关键词： Absolute Gravimetry GPS Tidal Gravity Modeling and Observation Scintrex Gravimeter Co-Seismic Effect for Tohoku-Oki Earthquake

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

New Orbital Parameters of 850 Wide Visual Binary Stars and Their Statistical Properties

引用

Research in Astronomy and Astrophysics 2025年第1期25卷 323-333页

作者： Igor Izmailov maxim Khovritchev Central Astronomical Observatory Russian Academy of Sciences

Based on positional observations and measurements of radial velocities,the orbits of 850 wide visual binary star have been *** parameters of the log-normal distributions for the histograms of orbital periods,stella masses,and semimajor axes in astronomical units have been *** eccentricity histogram for binary star with orbital periods less than 400 yr follows a normal distribution centered at e=0.545+/-*** stars with longer periods,this distribution obeys the law f=2e,with accuracy to *** mass-to-luminosity relation for stars with well-determined masses is given by:logL⊙=4.33 logM⊙-0.11,where L⊙and M⊙are th luminosity and mass of the star in units of the solar luminosity and mass,respectively.

关键词： (stars:) binaries: visual stars: fundamental parameters stars: statistics

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

Yb:Sc_(2)O_(3) Transparent Ceramics Fabricated from Co-precipitated Nano-powders:Microstructure and Optical Property

引用

无机材料学报 2025年第2期40卷 215-224页

作者： YE Junhao ZHOU Zhenzhen HU Chen WANG Yanbin JING Yanqiu LI Tingsong CHENG Ziqiu WU Junlin IVANOV maxim HRENIAK Dariusz LI Jiang Transparent Ceramics Research Center Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Center of Excellence for Photoconversion Vinča Institute of Nuclear SciencesNational Institute of the Republic of SerbiaUniversity of Belgrade11001 BelgradeSerbia Institute of Electrophysics Ural Branch Russian Academy of SciencesEkaterinburg 620016Russia Institute of Low Temperature and Structure Research Polish Academy of SciencesWroclaw 326109Poland

Sc_(2)O_(3),as a host for solid-state laser gain materials,has advantage of high thermal conductivity and easy matching with activating ions,which is promising in high-power laser ***,Yb-doped Sc_(2)O_(3) ceramics have been fabricated at very high sintering temperatures,but their optical quality and sintering process still need further *** this work,5%Yb:Sc_(2)O_(3)(in mass)nano-powders were obtained by co-precipitation,and then transparent ceramics were fabricated by vacuum pre-sintering and hot isostatic pressing(HIP)*** cubic Yb:Sc_(2)O_(3) nano-powders with good dispersity and an average crystallite of 29 nm were *** of pre-sintering temperatures(1500-1700℃)on densification process,microstructure changes,and optical transmittance of Yb:Sc_(2)O_(3) ceramics was *** data revealed that all samples have a uniform microstructure,while the average grain sizes increase with the increase of the sintering ***,the optimum in-line transmittance of Yb:Sc_(2)O_(3) ceramics,pre-sintered at 1550℃after HIP post-treatment,reaches 78.1%(theoretical value of 80%)at 1100 *** properties of the Yb:Sc_(2)O_(3) ceramics reveal that the minimum population inversion parameterβ2 and the luminescence decay time of 5%Yb:Sc_(2)O_(3) ceramics are 0.041 and 0.49 ms,respectively,which demonstrate that the optical quality of the Yb:Sc_(2)O_(3) has been ***,their best vacuum sintering temperature can be controlled down to a lower temperature(1550℃).In conclusion,Yb:Sc_(2)O_(3) nano-powders are successfully synthesized by co-precipitation method,and good optical quality transparent ceramics are fabricated by vacuum pre-sintering at 1550℃and HIP post-treatment.

关键词： nano-powder Yb:Sc_(2)O_(3) transparent ceramic hot isostatic pressing optical property

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

On the primitive divisors of the recurrent sequence un＋1=(4cos^2(2π/7)-1)un-un-1 with applications to group theory

引用

Science China Mathematics 2018年第11期61卷 2101-2110页

作者： maxim Vsemirnov St. Petersburg Department of V.A. Steklov Institute of Mathematics St. Petersburg 191023 Russia Department of Mathematics and Mechanics St. Petersburg State University St. Petersburg 198504 Russia

Consider the sequence of algebraic integers un given by the starting values u0=0,u1=1 and the recurrence u_(n+1)=(4cos^2(2π/7)-1)u_n-u_(n-1).We prove that for any n ■{1,2,3,5,8,12,18,28,30}the n-th term of the sequence has a primitive divisor in Z[2 cos(2π/7)].As a consequence we deduce that for any sufficiently large n there exists a prime power q such that the groupcan be generated by a pair x,y with χ~2=y^3=(xy)~7=1 and the order of the commutator[x,y]is exactly *** latter result answers in affirmative a question of Holt and Plesken.

关键词： recurrent sequences primitive divisors Hurwitz groups

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

共沉淀纳米粉体制备Yb:Sc2O3透明陶瓷的微结构与光学性能（英文）

引用

无机材料学报 2025年第2期40卷 215-224页

作者：叶君豪周真真胡辰王雁斌荆延秋李廷松程梓秋吴俊林 IVANOV maxim HRENIAK Dariusz 李江中国科学院上海硅酸盐研究所透明陶瓷研究中心中国科学院大学材料科学与光电工程中心贝尔格莱德大学塞尔维亚共和国国家研究所 Vin?a核科学研究所光电转换卓越中心俄罗斯科学院乌拉尔分院电物理研究所波兰科学院低温与结构研究所

Sc2O3作为固体激光增益材料的基质,具有热导率高、与激活离子匹配性好等优点,在高功率固体激光应用中有着广阔的应用前景。目前, Yb掺杂的Sc2O3陶瓷可以在很高的烧结温度下合成,但陶瓷的光学质量和烧结温度还有待进一步优化。本研究采... 详细信息

Sc2O3作为固体激光增益材料的基质,具有热导率高、与激活离子匹配性好等优点,在高功率固体激光应用中有着广阔的应用前景。目前, Yb掺杂的Sc2O3陶瓷可以在很高的烧结温度下合成,但陶瓷的光学质量和烧结温度还有待进一步优化。本研究采用碳酸氢铵共沉淀法制备了分散性好、平均晶粒尺寸29 nm的立方相5%Yb:Sc2O3（掺杂量为质量分数）纳米粉体,并采用真空预烧结和热等静压（Hot Isostatic Pressing, HIP）后处理制备了5%Yb:Sc2O3透明陶瓷,详细研究了真空预烧结温度（1500～1700℃）对Yb:Sc2O3陶瓷的致密化过程、微观结构变化及光学透过率的影响。结果表明,所有样品均具有均匀的微观结构,且随着烧结温度的升高,样品的平均晶粒尺寸增大。值得注意的是,1550℃预烧的Yb:Sc2O3陶瓷经HIP后处理后,在1100nm处的最佳直线透过率达到78.1%（理论值为80%）。同时,还评估了Yb:Sc2O3陶瓷的光谱性能。5%Yb:Sc2O3陶瓷的最小粒子数反转参数β2和发光衰减时间分别为0.041和0.49ms。综上所述,采用共沉淀法成功制备了Yb:Sc2O3纳米粉体,通过1550℃真空预烧结和HIP后处理得到光学质量良好的Yb:Sc2O3透明陶瓷。

关键词：纳米粉体 Yb:Sc2O3 透明陶瓷热等静压烧结光学性能

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

Efficient multi-response adaptive sampling algorithm for construction of variable-fidelity aerodynamic tables

引用

Chinese Journal of Aeronautics 2019年第3期32卷 547-558页

作者： maxim TYAN Jae-Woo LEE Department of Aerospace Information Engineering Konkuk University

Adaptive sampling is an iterative process for the construction of a global approximation model. Most of engineering analysis tools computes multiple parameters in a single run. This research proposes a novel multi-response adaptive sampling algorithm for simultaneous construction of multiple surrogate models in a time-efficient and accurate manner. The new algorithm uses the Jackknife cross-validation variance and a minimum distance metric to construct a sampling criterion function. A weighted sum of the function is used to consider the characteristics of multiple surrogate models. The proposed algorithm demonstrates good performance on total 22 numerical problems in comparison with three existing adaptive sampling algorithms. The numerical problems include several two-dimensional and six-dimensional functions which are combined into singleresponse and multi-response systems. Application of the proposed algorithm for construction of aerodynamic tables for 2 D airfoil is demonstrated. Scaling-based variable-fidelity modeling is implemented to enhance the accuracy of surrogate modeling. The algorithm succeeds in constructing a system of three highly nonlinear aerodynamic response surfaces within a reasonable amount of time while preserving high accuracy of approximation.

关键词： Adaptive sampling Aerodynamic database Multi-response system Surrogate modeling Variable fidelity modeling

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

Primordial black holes

引用

Research in Astronomy and Astrophysics 2010年第6期10卷 495-528页

作者： maxim Yu.Khlopov Centre for Cosmoparticle Physics "Cosmion " National Research Nuclear University "Moscow Engineering Physics Institute " APC laboratory 10

Primordial black holes （PBHs） are a profound signature of primordial cosmological structures and provide a theoretical tool to study nontrivial physics of the early Universe. The mechanisms of PBH formation are discussed and observational constraints on the PBH spectrum, or effects of PBH evaporation, are shown to restrict a wide range of particle physics models, predicting an enhancement of the ultraviolet part of the spectrum of density perturbations, early dust-like stages, first order phase transitions and stages of superheavy metastable particle dominance in the early Universe. The mechanism of closed wall contraction can lead, in the inflationary Universe, to a new approach to galaxy formation, involving primordial clouds of massive BHs created around the intermediate mass or supermassive BH and playing the role of galactic seeds.

关键词： cosmology: theory -- elementary particles -- black hole physics -- dark matter -- early universe

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

Roots of the taxonomic impediment:Is the“integrativeness”a remedy?

引用

Integrative Zoology 2020年第1期15卷 2-15页

作者： maxim V.VINARSKI Laboratory of Macroecology and Biogeography of Invertebrates Saint-Petersburg State UniversitySaint-PetersburgRussia

The use of the“integrative approach”for classification of organisms since its formal establishment in 2005 has become a recurrent theme of zoosystematics.A bibliometric survey of the publications on integrative taxonomy of animals,which is aimed at exploring the most popular areas of research and characterizing the practical systematists’attitudes to this new approach,is *** analysis of 582 papers,which appeared between 2005 and 2017 in journals indexed by Scopus and the Web of Science Core Collection,has illustrated the gradual growth of the popularity of integrative taxonomy as well as some biases in the representation of higher taxa in“integrated”*** has been shown that the“integrative”papers have more chance of appearing in a top-ranking journal and gain relatively more citations as compared with non-integrative *** obtained results are discussed in the context of the“taxonomic impediment”problem thought to be a consequence of the institutional crisis of traditional taxonomy,which has been vividly debated over the past decades.

关键词： animal systematics bibliometric analysis biodiversity crisis integrative taxonomy taxonomic impediment

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

Post-pancreatitis diabetes mellitus and excess intra-pancreatic fat deposition as harbingers of pancreatic cancer

引用

World Journal of Gastroenterology 2021年第17期27卷 1936-1942页

作者： maxim S Petrov School of Medicine The University of AucklandAuckland 1142New Zealand

Progress in the fight against pancreatic cancer has been hampered by many *** of them is the inability to detect the disease early in overwhelming majority of *** present paper outlines a novel way in which progress could be *** includes a focus on two harbingers—post-pancreatitis diabetes mellitus and excess intra-pancreatic fat deposition—that converge at affecting the tumor macroenvironment and microenvironment specifically in the pancreas,not other *** two entities have the potential to be incorporated into future screening strategies with a view to early detecting of pancreatic cancer.

关键词： Pancreatic cancer Post-pancreatitis diabetes mellitus Intra-pancreatic fat Pancreatitis Early detection Screening

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

Transverse magnetoresistance peculiarities of thermoelectric Lu-doped Bi_2Te_3 compound due to strong electrical disorder

引用

Journal of Rare Earths 2019年第3期37卷 292-298页

作者： Oleg Ivanov maxim Yaprintsev Elena Danshina Belgorod State University Belgorod State Technological University named after V.G.Shukhov

The n-type thermoelectric Bi_(1.9)Lu_(0.1)Te_3 was prepared by microwave-solvothermal method and spark plasma sintering. The magnetic field and temperature dependences of transverse magneto resistance measured within temperature 2-200 K interval allow finding the peculiarities characteristic for strongly disordered and inhomogeneous semiconductors. The first peculiarity is due to appearance of linear-inmagnetic field contribution to the total magneto resistance reflected in a crossover from quadratic magnetoresistance at low magnetic fields to linear magneto resistance at high magnetic fields. The linear magnetoresistance can result from the Hall resistance picked up from macroscopically distorted current paths due to local variations in stoichiometry of the compound studied. The second peculiarity is that both linear magnetoresistance magnitude and crossover field are functions of carrier mobility which is in agreement with the Parish and Littlewood model developed for disordered and inhomogeneous semiconductors. An increase in the mobility due to a decrease in temperature is accompanied by an increase in the magnetoresistance magnitude and a decrease in the crossover field. Finally, the third peculiarity is related to the remarkable deviation of the total magnetoresistance measured at various temperatures from the Kohler's rule. Presence of strong inhomogeneity and disorder in the Bi_(1.9)Lu_(0.1)Te_3 structure concluded from the magnetoresistance peculiarities can be responsible for the remarkable reduction in the total thermal conductivity of this compound.

关键词： Bismuth telluride Linear positive magnetoresistance Semiconductors Thermoelectric material Carrier mobility Kohler’s rule

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：