检索结果-南通市图书馆

Research in Astronomy and Astrophysics 2017年第5期17卷 31-38页

作者： Diana petrova Kjurkchieva velimir Angelov Popov Sunay Ibryamov Ibryamov Doroteya Lyubenova vasileva Nikola Ivanov petrov Department of Physics Shumen University115 Universitetska Str.9712 ShumenBulgaria IRIDA Observatory Rozhen NAOBulgaria Institute of Astronomy and NAO Bulgarian Academy of Sciences72 Tsarigradsko Shose Blvd.1784 SofiaBulgaria

Photometric observations in Sloan g′and i′bands of four W UMa binaries, v796 Cep,v797 Cep, CSS J015341.9＋381641 and NSvS 3853195, are presented. Our observations showed that CSS J015404.1＋382805 and NSvS 3853195 are the same star. We determined the initial epochs T_0 of all targets and found improved values for the period of NSvS 3853195. The light curve solutions of our data revealed that the components of each target are almost the same in terms of mass, temperature,radius and luminosity. The stellar components are g and K spectral types and undergo partial *** systems have barely-overcontact configurations and can be classified as H subtype W UMa *** established that the relation between the luminosity ratio l_2/l_1 and mass ratio q of our targets is approximately l_2/l_1 = q^（1.5）.

关键词： stars: binaries: eclipsing -- stars: fundamental parameters -- stars: individual (v796 Cep,v797 Cep CSS J015341.9+381641 NSvS 3853195)

Measurement of J/ψ→η_cγ at KEDR

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2010年第6期34卷 831-835页

作者： v.v.Anashin v.M.Aulchenko E.M.Baldin A.K.Barladyan A.Yu.Barnyakov M.Yu.Barnyakov S.E.Baru I.v.Bedny O.L.Beloborodova A.E.Blinov v.E.Blinov A.v.Bobrov v.S.Bobrovnikov A.v.Bogomyagkov A.E.Bondar A.R.Buzykaev S.I.Eidelman Yu.M.glukhovchenko v.v.gulevich D.v.gusev S.E.Karnaev g.v.Karpov S.v.Karpov T.A.Kharlamova v.A.Kiselev S.A.Kononov K.Yu.Kotov E.A.Kravchenko v.F.Kulikov g.Ya.Kurkin E.A.Kuper E.B.Levichev D.A.Maksimov v.M.Malyshev A.L.Maslennikov A.S.Medvedko O.I.Meshkov A.I.Milstein S.I.Mishnev I.I.Morozov N.Yu.Muchnoi v.v.Neufeld S.A.Nikitin I.B.Nikolaev I.N.Okunev A.P.Onuchin S.B.Oreshkin I.O.Orlov A.A.Osipov S.v.Peleganchuk S.g.Pivovarov P.A.Piminov v.v.petrov A.O.Poluektov I.N.Popkov g.E.Pospelov v.g.Prisekin A.A.Ruban v.K.Sandyrev g.A.Savinov A.g.Shamov D.N.Shatilov B.A.Shwartz E.A.Simonov S.v.Sinyatkin Yu.I.Skovpen A.N.Skrinsky v.v.Smaluk A.v.Sokolov A.M.Sukharev E.v.Starostina A.A.Talyshev v.A.Tayursky v.I.Telnov Yu.A.Tikhonov K.Yu.Todyshev g.M.Tumaikin Yu.v.Usov A.I.vorobiov A.N.Yushkov v.N.Zhilich v.v.Zhulanov A.N.Zhuravlev Budker Institute of Nuclear Physics Novosibirsk State University Novosibirsk State Technical University

We present a study of the inclusive photon spectra from 5.9 million J/ψ decays collected with the KEDR detector at the vEPP-4M e＋e collider. We measure the branching fraction of radiative decay J/ψ→ηcγ, ηc width and mass. Our preliminary results are： M（ηc） = 2979.4± 1.5 ± 1.9 Mev/c^2, Г（ηc） = 27.8±5.1 ±3.3 Mev, B（Jψ→ηcγ） = （2.34±0.15±0.40）%.

关键词： ηc meson full width mass radiative decay

Functional Conjugation of the Different Regulatory Responses to the Stress Stimuli in Healthy Human Subjects

在线全文

学校读者我要写书评

暂无评论

Open Journal of Applied Sciences 2016年第8期6卷 489-500页

作者： Yurij g. Sukhovey Andrey v. Koptyug Tatjana A. Fisher Sergey A. petrov Evgenij L. Dotsenko Institute of Clinical Immunology Siberian Division of Russian Academy of Sciences Tyumen Russia Sports Tech Research Centre Mid Sweden University &Ouml stersund Sweden Tyumen Research Centre Siberian Division of Russian Academy of Sciences Tyumen Russia Tyumen State Oil and gas Institute Tyumen Russia Tyumen State University Tyumen Russia

Present article discusses the physiological mechanisms of the state employees adaptation during active training in temporary groups. It is suggested that adaptive mechanisms to adverse effects may be studied basing on the concept of functional isomorphism of the psychic and immune systems. Adaptive mechanisms were studied through the monitoring of the stress factors’ impact upon the law enforcement officers when training outside the places of permanent deployment. The specific purpose of present study was to evaluate the physiological indicators of the psychic, immune and endocrine systems dynamics at different stages of adaptation of the live organism to a stressful situation, hoping to get better insight into possible relations between psychic and immune domains. Through monitoring of the dynamics of the endocrine and immune responses to the psychic stimuli, it was possible to correlate the stages of the stress onset to the phases of specific immune reactions. Strong correlations between the parameters characterizing activation of the psychic and immune responses support the hypothesis of the presence of “strong cooperation” between psychic and immune domains. It supports earlier hypothesis that we are monitoring different manifestations of the functioning of a complex inseparable psycho-immune meta-system.

关键词： Stress Immune and Psychic Domains Endocrine System Immune Response Stages Functional

Pancreatic enzymes and abdominal adipose tissue distribution in new-onset prediabetes/diabetes after acute pancreatitis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of gastroenterology 2021年第23期27卷 3357-3371页

作者： Juyeon Ko Loren Skudder-Hill Jaelim Cho Sakina H Bharmal Maxim S petrov School of Medicine University of AucklandAuckland 1142New Zealand

BACKgROUND New-onset prediabetes/diabetes after acute pancreatitis(NODAP)is the most common sequela of pancreatitis,and it differs from type 2 prediabetes/diabetes mellitus(T2DM).AIM To study the associations between circulating levels of pancreatic amylase,pancreatic lipase,chymotrypsin and fat phenotypes in NODAP,T2DM,and *** Individuals with NODAP(n=30),T2DM(n=30),and sex-matched healthy individuals(n=30)were *** fat phenotypes(intra-pancreatic fat,liver fat,skeletal muscle fat,visceral fat,and subcutaneous fat)were determined using the same magnetic resonance imaging protocol and scanner magnet strength for all ***-way analysis of covariance,linear regression analysis,and relative importance analysis were *** Intra-pancreatic fat deposition(IPFD)was higher in NODAP(9.4%±1.8%)and T2DM(9.8%±1.1%)compared with healthy controls(7.8%±1.9%)after adjusting for covariates(P=0.003).Similar findings were observed in regards to visceral fat volume(P=0.005),but not subcutaneous fat volume,liver fat,or skeletal muscle *** IPFD(β=-2.201,P=0.023)and visceral fat volume(β=-0.004,P=0.028)were significantly associated with circulating levels of pancreatic amylase in NODAP,but not in T2DM or healthy *** the five fat phenotypes,IPFD explained the highest amount of variance in pancreatic amylase concentration(R2=15.3%out of 41.2%).None of the phenotypes contributed meaningfully to the variance in pancreatic lipase or *** Both NODAP and T2DM are characterized by increased IPFD and visceral fat ***,only NODAP is characterized by significant inverse associations between the two fat phenotypes and pancreatic amylase.

关键词： Amylase Lipase Chymotrypsin Pancreatitis Diabetes Intra-pancreatic fat visceral fat Liver fat

Recent results from the KEDR detector

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Physics C 2010年第6期34卷 650-655页

作者： v.v.Anashin v.M.Aulchenko E.M.Baldin A.K.Barladyan A.Yu.Barnyakov M.Yu.Barnyakov S.E.Baru I.v.Bedny O.L.Beloborodova A.E.Blinov v.E.Blinov A.v.Bobrov v.S.Bobrovnikov A.v.Bogomyagkov A.E.Bondar A.R.Buzykaev S.I.Eidelman Yu.M.glukhovchenko v.v.gulevich D.v.gusev S.E.Karnaev S.v.Karpov T.A.Kharlamova v.A.Kiselev S.A.Kononov K.Yu.Kotov E.A.Kravchenko v.F.Kulikov g.Ya.Kurkin E.A.Kuper E.B.Levichev D.A.Maksimov v.M.Malyshev A.L.Maslennikov A.S.Medvedko O.I.Meshkov S.I.Mishnev I.I.Morozov N.Yu.Muchnoi v.v.Neufeld S.A.Nikitin I.B.Nikolaev I.N.Okunev A.P.Onuchin S.B.Oreshkin I.O.Orlov A.A.Osipov S.v.Peleganchuk S.g.Pivovarov P.A.Piminov v.v.petrov A.O.Poluektov I.N.Popkov v.g.Prisekin A.A.Ruban v.K.Sandyrev g.A.Savinov A.g.Shamov D.N.Shatilov B.A.Shwartz E.A.Simonov S.v.Sinyatkin Yu.I.Skovpen A.N.Skrinsky v.v.Smaluk A.v.Sokolov A.M.Sukharev E.v.Starostina A.A.Talyshev v.A.Tayursky v.I.Telnov Yu.A.Tikhonov K.Yu.Todyshev g.M.Tumaikin Yu.v.Usov A.I.vorobiov A.N.Yushkov v.N.Zhilich v.v.Zhulanov A.N.Zhuravlev Budker Institute of Nuclear Physics Novosibirsk State University Novosibirsk State Technical University 20Karl Marx prospectNovosibirsk630092Russia

We report results of experiments performed with the KEDR detector at the vEPP-4M e^＋e^- collider. They include precise measurement of the D^0 and D^± meson masses, determination of the ψ（3770） resonance parameter... 详细信息

关键词： D meson ψ(3770) mass narrow resonances

AN ECONOMIC APPROACH TO OPTIMIZATION OF THE FINE vALUE FOR ANTITRUST vIOLATIONS

在线全文

学校读者我要写书评

暂无评论

AN ECONOMIC APPROACH TO OPTIMIZATION OF THE FINE VALUE FOR A...

作者： A.v.Shmakov S.P.petrov Novosibirsk state technical university

The article proposes approach to identification of the optimal value of fine for the violation of antitrust law, based on the analysis of incentives of economic entities to violate the law;this approach was tested on ...

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

各种生产过程最优节能参数的存在性(英文)

宁波大学学报（理工版） 2012年第1期25卷 48-52页

作者： BRATOv v petrov Y v vOLKOv g 圣彼得堡国立大学俄罗斯圣彼得堡198504 俄罗斯科学院力学研究所俄罗斯圣彼得堡198504

研究表明,在诸多生产过程中可以优化输入的断裂能量,使加工能耗最小.以一个简单的中心断裂为例,当加截脉冲具有某种特定形态时,施加到样品上引发破裂的能量可以取一个显著的最小值.研究结果显示,优化各种与断裂有关的生产过程,使得能量... 详细信息

研究表明,在诸多生产过程中可以优化输入的断裂能量,使加工能耗最小.以一个简单的中心断裂为例,当加截脉冲具有某种特定形态时,施加到样品上引发破裂的能量可以取一个显著的最小值.研究结果显示,优化各种与断裂有关的生产过程,使得能量消耗最小是可能的.这种优化的可能应用包括钻孔或岩石粉碎过程,此时能耗成本通常占生产成本的最大部分.上述方法可以预测钻孔或研磨机等的最优参数,从而大大降低生产成本.文章第二部分研究了接触作用条件下引发断裂的能量输入行为.考虑一个球型粒子冲击一个半空间靶的情形,接触导致的应力场可用赫兹解来估计.定义了断裂判据之后,即可确定引发断裂的球粒临界速度及相应的临界动能.该动能的大小依赖于加载的持续时间,并十分明显地存在一个最小值.据此可断定,存在一个动态冲击的能量最优模式.

关键词：节能最优工作模式孕育时间脆性断裂岩石

All-optical generation of static electric field in a single metal-semiconductor nanoantenna

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2023年第11期12卷 2350-2362页

作者： Yali Sun Artem Larin Alexey Mozharov Eduard Ageev Olesia Pashina Filipp Komissarenko Ivan Mukhin Mihail petrov Sergey Makarov Pavel Belov Dmitry Zuev School of Physics and Engineering ITMO UniversityLomonosova 9Saint Petersburg 191002Russia Center for Nanotechnologies Alferov UniversityKhlopina 8/3Saint Petersburg 194021Russia Higher School of Engineering Physics Peter the Great Saint Petersburg Polytechnic UniversityPolitekhnicheskaya 29Saint Petersburg 195251Russia

Electric field is a powerful instrument in nanoscale engineering,providing wide functionalities for control in various optical and solid-state *** development of a single optically resonant nanostructure operating with a charge-induced electrical field is challenging,but it could be extremely useful for novel nanophotonic ***,we show a resonant metal-semiconductor nanostructure with a static electric field created at the interface between its components by charge carriers generated via femtosecond laser *** study this field experimentally,probing it by second-harmonic generation signal,which,in our system,is time-dependent and has a non-quadratic signal/excitation power *** developed numerical models reveal the influence of the optically induced static electric field on the second harmonic generation *** also show how metal work function and silicon surface defect density for different charge carrier concentrations affect the formation of this *** estimate the value of optically-generated static electric field in this nanoantenna to achieve≈10^(8)v/*** findings pave the way for the creation of nanoantenna-based optical memory,programmable logic and neuromorphic devices.

关键词： antenna optical field

Magnetoelectric gradient structures: Properties and applications

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Dielectrics 2022年第4期12卷 24-29页

作者： A.O.Nikitin v.A.Kiselev v.A.Misilin Yu v.Kiliba R.v.petrov Institute of Electronic and Informative Systems Novgorod State UniversityNo.41B.St.Petersburgskaya Str.Veliky Novgorod 173003Russia

This paper is devoted to a comprehensive study on a new type of microwave structures named magnetoelectric(ME)gradient *** structures are studied in this paper to understand the possibilities and application principles in feasible *** structure under study was calculated at different values of the applied electric field and different values of the relative per-mittivity of the artificial dielectric *** layered multiferroic structure in inhomogeneous electric and magnetic fields was calculated on the basis of the previously proposed mathematical *** eigenwaves spectrum for several considered cases was the result of the performed *** concept of using ME gradient structures in the design of electronically controlled microwave devices is formed on the basis of the results of a numerical *** of this type will preferably be used in electronically controlled devices for the directional transmission of microwave signals,as it was shown in the theoretical part of the paper.

关键词： Composite structures multiferroics magnetoelectric gradient structures artificial dielectric eigenwave spectrum

How to stabilize standard perovskite solar cells to withstand operating conditions under an ambient environment for more than 1000 hours using simple and universal encapsulation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第3期78卷 246-252,I0008页

作者： Nikolai A.Belich Andrey A.petrov Pavel A.Ivlev Natalia N.Udalova Alla A.Pustovalova Eugene A.goodilin Alexey B.Tarasov Laboratory of New Materials for Solar Energetics Faculty of Materials ScienceLomonosov Moscow State University119991 MoscowRussia Department of Chemistry Lomonosov Moscow State University119991 MoscowRussia

We introduce a simple and universal scalable encapsulation strategy for perovskite solar cells based on thermal vacuum evaporation of MgF2or MoO3-xcapping layer followed by sealing the device with glass and Uv-curable *** proposed encapsulation method is beneficial to most of the other known encapsulation approaches being fully harmless to perovskite and transporting layers and processible at room *** deposition of the capping layer promotes efficient removal of water,oxygen and organic solvent residuals from the device prior to sealing and could be easily performed using standard equipment for metal electrode *** proposed strategy is transferrable to any lab-scale perovskite solar cell prototypes regardless of their geometry and architecture and results in excellent stability of the devices in ambient air and long operating *** the 1000 hours stability test at ambient air(30%-60% RH),the cells preserved 92.9% of their initial efficiency on average under 1 Sun illumination at constant maximum power point tracking(MPPT,ISOS-L-1) and over 96% under sto rage in the dark(ISOS-D-1),thus evidencing for the high effectiveness of the proposed encapsulation approach.

关键词： Perovskite solar cells Halide perovskites Encapsulation High stability ISOS-L-1