检索结果-南通市图书馆

Isochrone Fitting of galactic globular Clusters—Ⅵ.High-latitude Clusters NgC 5024 (M53),NgC 5053,NgC 5272 (M3),NgC 5466,and NgC7099 (M30)

引用

Research in Astronomy and Astrophysics 2024年第6期24卷 170-190页

作者： g.A.gontcharov S.S.savchenko A.A.Marchuk C.J.Bonatto O.S.Ryutina M.Yu.khovritchev V.B.Il'in A.V.Mosenkov D.M.Poliakov A.A.Smirnov Central(Pulkovo)Astronomical Observatory Russian Academy of SciencesPulkovskoye chaussee 65/1St.Petersburg 196140Russia Saint Petersburg State University Universitetskij pr.28St.Petersburg 198504Russia Special Astrophysical Observatory Russian Academy of Sciences369167 Nizhnij ArkhyzRussia Departamento de Astronomia Instituto de FísicaUFRGSAv.Bento Gonçalves9500Porto AlegreRSBrazil Saint Petersburg University of Aerospace Instrumentation Bol.Morskaya ul.67ASt.Petersburg 190000Russia Department of Physics and Astronomy Brigham Young UniversityN283 ESCProvoUT 84602USA

We fit various color–magnitude diagrams(CMDs) of the high-latitude galactic globular clusters NgC 5024(M53),NgC 5053,NgC 5272(M3),NgC 5466,and NgC 7099(M30) by isochrones from the Dartmouth Stellar Evolution Database and Bag of Stellar Tracks and Isochrones for α–enrichment [α/Fe] = +*** the CMDs,we use data sets from Hubble Space Telescope,gaia,and other sources utilizing,at least,25 photometric filters for each *** obtain the following characteristics with their statistical uncertainties for NgC 5024,NgC 5053,NgC 5272,NgC 5466,and NgC 7099,respectively:metallicities [Fe/H] =-1.93 ± 0.02,-2.08 ± 0.03,-1.60 ± 0.02,-1.95 ± 0.02,and-2.07 ± 0.04 dex with their systematic uncertainty 0.1 dex;ages 13.00 ± 0.11,12.70 ± 0.11,11.63 ± 0.07,12.15 ± 0.11,and 12.80 ± 0.17 gyr with their systematic uncertainty 0.8 gyr;distances(systematic uncertainty added) 18.22 ± 0.06 ± 0.60,16.99 ± 0.06 ± 0.56,10.08 ± 0.04 ± 0.33,15.59 ±0.03 ± 0.51,and 8.29 ± 0.03 ± 0.27 kpc;reddenings E(B-V) = 0.023 ± 0.004,0.017 ± 0.004,0.023 ± 0.004,0.023 ± 0.003,and 0.045 ± 0.002 mag with their systematic uncertainty 0.01 mag;extinctions AV= 0.08 ± 0.01,0.06 ± 0.01,0.08 ± 0.01,0.08 ± 0.01,and 0.16 ± 0.01 mag with their systematic uncertainty 0.03 mag,which suggest the total galactic extinction AV= 0.08 across the whole galactic dust to extragalactic objects at the North galactic *** horizontal branch morphology difference of these clusters is explained by their different metallicity,age,mass-loss efficiency,and loss of low-mass members in the evolution of the core-collapse cluster NgC 7099 and loose clusters NgC 5053 and NgC 5466.

关键词： (stars:)Hertzsprung Russell and C-M diagrams (ISM:)dust extinction (galaxy:)globular clusters:general (galaxy:)globular clusters:individual(NgC 5024,NgC 5053,NgC 5272,NgC 5466,NgC7099)

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

One stop shop Ⅱ:taxonomic update with molecular phylogeny for important phytopathogenic genera:26–50(2019)

引用

Fungal Diversity 2019年第1期 41-129页

作者： Ruvishika S.Jayawardena kevin D.Hyde Rajesh Jeewon Masoomeh ghobad-Nejhad Dhanushka N.Wanasinghe Ningguo Liu Alan J.L.Phillips Jose Ribamar COliveira-Filho gladstone Ada Silva Tatiana B.gibertoni P.Abeywikrama L.M.Carris k.W.T.Chethana A.J.Dissanayake S.Hongsanan S.C.Jayasiri A.R.McTaggart R.H.Perera k.Phutthacharoen k.g.savchenko R.g.Shivas Naritsada Thongklang Wei Dong DePing Wei Nalin NWijayawardena Ji-Chuan kang The Engineering Research Center of Southwest Biopharmaceutical Resources Ministry of EducationGuizhou UniversityGuiyang 550025People’s Republic of China Center of Excellence in Fungal Research Mae Fah Luang UniversityChiang RaiThailand key Laboratory for Plant Diversity and Biogeography of East Asia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China Department of Health Sciences Faculty of ScienceUniversity of MauritiusReduitMauritius Department of Biotechnology Iranian Research Organization for Science and Technology(IROST)P.O.Box 15815-3538Tehran 15819Iran World Agroforestry Centre East and Central AsiaKunming 650201YunnanPeople’s Republic of China Universidade de Lisboa Faculdade de CienciasBiosystems and Integrative Sciences Institute(BioISI)Campo Grande1749-016 LisbonPortugal Departamento de Micologia Universidade Federal de PernambucoAvenida da EngenhariaS/N-Cidade UniversitariaRecifePE 50740-600Brazil Beijing key Laboratory of Environmet Friendly Management on Fruit Disease and Pests in North China Institute of Plant and Environment ProtectionBeijing Academy of Agriculture and Forestry SciencesBeijing 100097People’s Republic of China Department of Plant Pathology Washington State UniversityPullmanWA 99164USA College of Life Science and Oceanography ShenZhen University1068Nanhai AvenueNanshanShenzhen 518055China Queensland Alliance for Agriculture and Food Innovation The University of QueenslandBrisbaneQLD 4001Australia Department of Biological Sciences Butler UniversityIndianapolisIN 46208USA Centre for Crop Health University of Southern QueenslandToowoombaQLD 4350Australia Department of Entomology and Plant Pathology Faculty of AgricultureChiang Mai UniversityChiang Mai 50200Thailand Faculty of Agriculture National Resources and EnvironmentNaresuan UniversityPhitsanulok 65000Thailand

This paper is the second in a series focused on providing a stable platform for the taxonomy of phytopathogenic *** focuses on 25 phytopathogenic genera:Alternaria,Bipolaris,Boeremia,Botryosphaeria,Calonectria,Coniella,Corticiaceae,Curvularia,Elsinoe,Entyloma,Erythricium,Fomitiporia,Fulviformes,Laetisaria,Limonomyces,Neofabraea,Neofusicoccum,Phaeoacremonium,Phellinotus,Phyllosticta,Plenodomus,Pseudopyricularia,Tilletia,Venturia and Waitea,using recent molecular data,up to date names and the latest taxonomic *** each genus a taxonomic background,diversity aspects,species identification and classification based on molecular phylogeny and recommended genetic markers are *** this study,varieties of the genus Boeremia have been elevated to species ***,Bipolaris,Curvularia,Neofusicoccum and Phyllosticta that were included in the One Stop Shop 1 paper are provided with updated entries,as many new species have been introduced to these genera.

关键词： Boeremia DNA barcodes Endophytes Plant pathology Systematics Taxonomy

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

Investigation of the parameters of spiral pattern in galaxies:the arm width

引用

Research in Astronomy and Astrophysics 2020年第8期20卷 177-180页

作者： Aleksandr Mosenkov Sergey savchenko Alexander Marchuk Department for Management of Science and Technology Development Ton Duc Thang UniversityHo Chi Minh CityVietnam Faculty of Applied Sciences Ton Duc Thang UniversityHo Chi Minh CityVietnam Saint Petersburg State University Department of AstrophysicsSt.Petersburg198504 Russia Special Astrophysical Observatory Russian Academy of SciencesNizhnii Arkhyz369167 Russia

In this work,we determine the parameters of spiral structure for a sample of face-on spiral *** practice,the solution to this problem is a hard task because of the diversity of observed characteristics associated with spiral structure,such as the number of arms,their shape,arm contrast,*** study spiral structure in galaxies based on an analysis of photometric cuts perpendicular to the arm *** method is based on an approximation of these slices with an analytical function and derivation of the parameters of spiral structure(arm width,asymmetry,pitch angle)using the fitted parameters from this *** algorithm has been applied to a sample of 155 galaxies selected from the Sloan Digital Sky Survey in different *** this paper,we only consider the results on arm width:most spirals exhibit an increase in their width with galactocentric *** 14 per cent of galaxies in our sample show an opposite trend or have an almost constant arm width at all radii.

关键词： methods:data analysis techniques:photometric galaxies:structure

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

geant4 application for efficiency simulation of PbF2 based calorimeters

引用

Radiation Detection Technology and Methods 2023年第3期7卷 435-446页

作者： A.A.savchenko A.A.Tishchenko Department of Condensed Matter Physics National Research Nuclear University“MEPhI”Kashirskoe Sh.31MoscowRussia 115409 Laboratory of Radiation Physics Belgorod National Research UniversityPobedy St.85BelgorodRussia 308015

Purpose This study aims to create a new tool for fast computer simulations allowing one to design advanced electromagnetic calorimeters with the required *** application must calculate the calorimeter efficiency and measure the particles'energies,momenta and interaction time to detect the *** application should become the basis for a new technology of positron emission *** To solve the problem,a new C++application based on geant4 simulation toolkit has been *** monitor the response of calorimeters to different types of primary particles,we used different auxiliary geant4 *** addition,we compare the simulation results for the detectors of three different setups,taking into account the detection of both electrons and gamma-quanta,and analyze their *** evaluate the capability of calorimeters to work under radiation load,we use an experimentally measured transmission function of radiation-damaged PbF_(2).Results Three calorimeter setups exploiting PbF_(2)were simulated with a new C++application based on *** showed that such type of calorimeter has an energy resolution of 4.1%√E^(e+)[geV]and good linearity of response for geV positrons *** efficiency of such structures is found to be approximately 20%for gamma photons’*** multilayered structure based on gamma-quanta detection has been proven to be more *** was shown that for the total ionizing dose of 30 krad the Cherenkov light yield decreases by up to two times for 14 cm long PbF_(2)crystals,while for the shorter ones(2.5 and 1.5 cm)this effect is almost *** We present a new user application in geant4 for fast simulation of complex structures designed for detection of different high-energy neutral and charged *** of calorimeter interaction with 10^(3) of 3 geV positrons takes 20 min on usual laptop,while for 105511 keV gamma photons it takes 1 min on *** application allows o

关键词： geant4 Cherenkov radiation Positron emission tomography Electromagnetic calorimeter PbF_(2)

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

浸渍硼氧化物改善柔性石墨的氧化稳定性和力学性能(英文)

引用

新型炭材料 2012年第1期27卷 12-18页

作者： D．V．savchenko A．A．Serdan V．A．Morozov g．VanTendeloo S．g．Ionov DepaxtmentofChemistry MoscowStateUniversityMoscow119991Russia； EMAT UniversityofAntwerpGroenenborgerlaan171B-2020AntwerpBelgium

膨胀石墨经硼氧化物浸渍修后辊轧制成柔性石墨箔。应用激光质谱、X-光电子谱、扫描电镜和热重测定分析了所制柔性石墨箔。结果表明:浸渍硼氧化物后石墨箔的初始氧化温度提高了约150℃。即使浸渍少量(质量分数低于2%)的硼氧化物也能提高... 详细信息

膨胀石墨经硼氧化物浸渍修后辊轧制成柔性石墨箔。应用激光质谱、X-光电子谱、扫描电镜和热重测定分析了所制柔性石墨箔。结果表明:浸渍硼氧化物后石墨箔的初始氧化温度提高了约150℃。即使浸渍少量(质量分数低于2%)的硼氧化物也能提高此材料的拉伸强度。纵观其浸渍改善效果,可能归因于膨胀石墨粒中与石墨片层化学键合的硼氧化物堵塞了其活性位点所致。

关键词：膨胀石墨石墨箔硼氧化物氧化防护拉伸强度

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

Utilisation of waste heat from exhaust gases of drying process

引用

Frontiers of Chemical Science and Engineering 2016年第1期10卷 131-138页

作者： Olga P. Arsenyeva Lidija Cucek Leonid L. Tovazhnyanskyy Petro O. kapustenko Yana A. savchenko Sergey k. kusakov Oleksandr I. Matsegora National Technical University 'kharkiv Polytechnic Institute' Kharkiv 61002 Ukraine Centre for Process Integration and Intensification-CPI2 Faculty of Information Technology University of Parmonia Egyetem utca 10 Veszprem Hungary AO SPIVDRUZHNIST-T LLC Kharkiv 61002 Ukraine

Nowadays a lot of low-grade heat is wasted from the industry through the off- and flue-gasses with different compositions. These gases provide the sensitive heat with utilisation potential and latent heat with the components for condensation. In this paper, process integration methodology has been applied to the partly condensed streams. A hot composite curve that represents the gas mixture cooling according to equation of state for real gases was drawn to account the gas-liquid equilibrium. According to the pinch analysis methodology, the pinch point was specified and optimal minimal temperature difference was determined. The location of the point where gas and liquid phases can be split for better recuperation of heat energy within heat exchangers is estimated using the developed methodology. The industrial case study of tobacco drying process off-gasses is analysed for heat recovery. The mathematical model was developed by using MathCad software to minimise the total annualised cost using compact plate heat exchangers for waste heat utilisation. The obtained payback period for the required investments is less than six months. The presented method was validated by comparison with industrial test data.

关键词： exhaust gas waste heat process integration plate heat exchanger

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

Acoustic emission characterization of sliding wear under condition of direct and inverse transformations in lowtemperature degradation aged Y-TZP and Y-TZP-Al_2O_3

引用

Friction 2018年第3期6卷 323-340页

作者： Nikolai L savchenko Andrey V FILIPPOV Sergei Yu TARASOV Andrey I DMITRIEV Evgeny V SHILkO Aleksandr S gRIgORIEV Institute of Strength Physics and Materials Science SB RAS National Research Tomsk Polytechnic University National Research Tomsk State University

In this research, results of the investigation of the sliding friction and wear of yttria-stabilized tetragonal zirconia polycrystalline(Y-TZP) and Y-TZP-Al_2O_3 samples preliminarily subjected to low-temperature degradation are reported. The investigation was carried out using a pin-on-disk tribometer with simultaneous recording of acoustic emission(AE) and vibration acceleration. The sliding wear process was found to be determined by dynamic direct and inverse Y-TZP transformations detected by monoclinic and tetragonal X-ray diffraction peak ratios. The AE signals generated under direct and inverse transformations can be used to characterize wear and friction mechanisms as well as direct and inversed sliding-induced phase transformations. The AE signal energy grows with the friction coefficient and the inverse transformation degree. Reduction of the AE signal energy indicates establishing the mild wear stage caused by effective stress-induced direct martensitic transformation. The AE signal median frequency increases in the case of lower friction. Numerical studies of wear subsurface fracture under conditions of stress-induced martensitic transformation were used to elucidate the role played by the phase transformation in Y-TZP and Y-TZP-Al_2O_3. Martensitic transformation in Y-TZP was described with use of the non-associated dilatant plasticity model. Simulation results particularly show that increase in the value of dilatancy coefficient from 0 to 0.2 is accompanied by 25%-30% reduce in characteristic length and penetration depth of sliding-induced subsurface cracks. As shown the AE may be an effective tool for in-situ monitoring the subsurface wear of materials experiencing both direct and inverse transformations.

关键词： zirconia transformation toughening low-temperature degradation friction acoustic emission numerical modeling movable cellular automata method

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

Laser-induced Breakdown Spectroscopy as a Powerful Tool for Online Quality Control in The Refractory Industry

引用

China's Refractories 2016年第1期25卷 32-38页

作者： Alexander BARYSHNIkOV Yoni gROISMAN Nir ELIEZER Micharl gAFT Lev AkSELROD Alexey savchenko Laser Distance Spectrometry Ltd. Petah Tikva 61050 Israel Magnezit group Moscow 119180 Russian Federation

Raw materials have a signcant influence on the *** of the final refractory products, as the crude ore often comes for processing with significant variations in chemical and mineralogical composition. Therefore, it is necessary to guarantee the stable quality of raw materials with pre-assigned qualitative factors. It is possible to solve these problems by separating raw materials by grades, including the rejection of the portions of material unsuitable for specific application, and by reasonable control of the processing parameters based on real-time infirmation about chemical composition of raw materials. This can be effectively achieved by MAYA laser ele- mental analyzers based on LIBS. Being applied in ex traction, beneficiation and processing of the mineral raw materials, LIBS analyzers can be used for automatic sor ting ＂ the ore extracted or crushed and automatic dosage of components to stabilize the composition of raw material mixtures.

关键词： LIBS online elemental analysis refracto-ries minerals metals minerals beneficiation qualitycontrol

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

Structure,magnetic and adsorption properties of novel FePt/h-BN heteromaterials

引用

Nano Research 2023年第1期16卷 1473-1481页

作者： Anton S.konopatsky Vladislava V.kalinina Alena S.savchenko Denis.V.Leybo Ekaterina V.Sukhanova Viktor S.Baidyshev Zakhar I.Popov Andrey V.Bondarev Josef Polčák Dmitry V.Shtansky National University of Science and Technology(MISIS) Leninskiy prospect 4Moscow119049Russia Emanuel Institute of Biochemical Physics RAS Kosygina 4Moscow119334Russia katanov khakas State University 90 Lenin pr.655017 AbakanRussia Plekhanov Russian University of Economics 36 Stremyanny per.Moscow 117997Russia Department of Control Engineering Faculty of Electrical EngineeringCzech Technical University in PragueTechnicka 2Prague 16627Czech Republic CEITEC-Central European Institute of Technology Brno University of TechnologyPurkyňova 123Brno 61200 BrnoCzech Republic

Nanomaterials with high specific surface area and high absorption capacity are attracting increased interest aimed at imparting the desired magnetic *** work is devoted to the study of the effect of heat treatment in a hydrogen atmosphere on the microstructure,adsorption and magnetic properties of heterogeneous FePt/h-BN *** via the polyol process,FePt nanoparticles(NPs)had a sizegonal boron nitride(h-BN)*** temperature-activated fcc→fct phase transformation in ultrafine FePt NPs has been well *** NPs act as active centers dissociating H2 molecules and transfer adsorbed hydrogen atoms to the *** functional theory(DFT)calculations also indicate that the h-BN substrate can absorb hydrogen adsorbed on the FePt *** hydrogen circulation in the FePt/h-BN system promoted the fcc→fct phase transformation and allowed to control the magnetic ***/h-BN nanomaterials also exhibited a high adsorption capacity with respect to various organic dyes.

关键词： FePt/h-BN nanomaterials polyol synthesis phase transformations magnetic properties adsorption

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

Immunophenotypic characteristics of multipotent mesenchymal stromal cells that affect the efficacy of their use in the prevention of acute graft vs host disease

引用

World Journal of Stem Cells 2020年第11期12卷 1377-1395页

作者： Nataliya Petinati Nikolay kapranov Yulia Davydova Alexey Bigildeev Olesya Pshenichnikova Dmitriy karpenko Nina Drize Larisa kuzmina Elena Parovichnikova Valeriy savchenko Laboratory for Physiology of Hematopoiesis National Research Center for HematologyMoscow 125167Russia Laboratory for Immunophenotyping of Blood and Bone Marrow Cells National Research Center for HematologyMoscow 125167Russia Laboratory for genetic Engineering National Research Center for HematologyMoscow 125167Russia Hematopoiesis Depression and Bone Marrow Transplantation Department National Research Center for HematologyMoscow 125167Russia

BACkgROUND Multipotent mesenchymal stromal cells(MSCs)are widely used in the clinic due to their unique properties,namely,their ability to differentiate in all mesenchymal directions and their immunomodulatory *** donor MSCs were used to prevent the development of acute graft vs host disease(gVHD)after allogeneic bone marrow transplantation(allo-BMT).The administration of MSCs to patients was not always *** MSCs obtained from different donors have individual *** differences between MSC samples may affect their clinical *** To study the differences between effective and ineffective *** MSCs derived from the bone marrow of a hematopoietic stem cells donor were injected intravenously into allo-BMT recipients for gVHD prophylaxis at the moment of blood cell *** of 52 MSC samples that were administered to patients were examined,and the same cells were cultured in the presence of peripheral blood mononuclear cells(PBMCs)from a third-party donor or treated with the pro-inflammatory cytokines IL-1β,IFN and *** cytometry revealed the immunophenotype of the nontreated MSCs,the MSCs cocultured with PBMCs for 4 d and the MSCs exposed to *** proportions of CD25-,CD146-,CD69-,HLA-DR-and PD-1-positive CD4+and CD8+cells and the distribution of various effector and memory cell subpopulations in the PBMCs cocultured with the MSCs were also *** Differences in the immunophenotypes of effective and ineffective MSCs were *** the effective samples,the mean fluorescence intensity(MFI)of HLAABC,HLA-DR,CD105,and CD146 was significantly *** MSCs were treated with IFN or cocultured with PBMCs,the HLA-ABC,HLA-DR,CD90 and CD54 MFI showed a stronger increase in the effective MSCs,which indicated an increase in the immunomodulatory activity of these *** PBMCs were cocultured with effective MSCs,the proportions of CD4+and CD8+central memory cells significantly decreased

关键词： Multipotent mesenchymal stromal cells Acute graft vs host disease Immunophenotype Lymphocytes Immunomodulation Pro-inflammatory cytokines

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：