发布求助
文献互助 智能选刊 最新文献

Seriya 3: Fizika, Astronomiya最新文献

筛选
英文 中文
Machine Learning in the Problem of Extrapolating Variational Calculationsin Nuclear Physics 核物理变分计算外推问题中的机器学习
Seriya 3: Fizika, Astronomiya Pub Date : 2024-07-09 DOI: 10.55959/msu0579-9392.79.2430202
A. Mazur, R. E. Sharypov, A. M. Shirokov
{"title":"Machine Learning in the Problem of Extrapolating Variational Calculations\u0000in Nuclear Physics","authors":"A. Mazur, R. E. Sharypov, A. M. Shirokov","doi":"10.55959/msu0579-9392.79.2430202","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2430202","url":null,"abstract":"A modified machine learning method is proposed, utilizing an ensemble of artificial neural networks for the\u0000extrapolation of energies obtained in variational calculations, specifically in the No-core Shell Model (NCSM),\u0000to the case of the infinite basis. A new neural network topology is employed, and criteria for selecting both the\u0000data used for training and the trained neural networks for statistical analysis of the results are formulated.\u0000The approach is tested by extrapolating the deutron ground state energy in calculations with the Nijmegen II\u0000NN interaction and provides statistically significant results. This technique is applied to obtain extrapolated\u0000ground state energies of 6Li and 6He nuclei based on the NCSM calculations with Daejeon16 NN interaction.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141664753","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Singularities of Diffuse Wave Fields in Scattering Mediawith Refractive Index Gradients 具有折射率梯度的散射介质中漫射波场的奇异性
Seriya 3: Fizika, Astronomiya Pub Date : 2024-07-09 DOI: 10.55959/msu0579-9392.79.2430302
Y. Ilyushin
{"title":"Singularities of Diffuse Wave Fields in Scattering Media\u0000with Refractive Index Gradients","authors":"Y. Ilyushin","doi":"10.55959/msu0579-9392.79.2430302","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2430302","url":null,"abstract":"The subject of this paper is the radiative transfer in media with gradients of the refractive index. Asymptotic\u0000expressions of the intensity distributions in the vicinity of singular directions are derived. Critical conditions for\u0000the appearance of singular intensity distributions in fields of scattered radiation in a medium are formulated.\u0000It is shown that singular radiation fields in such media can be generated, among other things, by non-singular\u0000configurations of radiation sources. The obtained results are verified by direct comparison with the results of\u0000numerical calculations using the Monte Carlo statistical modeling method.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"119 27","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141665507","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Cluster Ion Bombardment on the Roughly Polished Surfaceof Single-Crystal Germanium Wafers 簇离子轰击对单晶锗晶片粗抛光表面的影响
Seriya 3: Fizika, Astronomiya Pub Date : 2024-07-09 DOI: 10.55959/msu0579-9392.79.2430301
I. Nikolaev, N. Korobeishchikov, A.V. Lapega
{"title":"Effect of Cluster Ion Bombardment on the Roughly Polished Surface\u0000of Single-Crystal Germanium Wafers","authors":"I. Nikolaev, N. Korobeishchikov, A.V. Lapega","doi":"10.55959/msu0579-9392.79.2430301","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2430301","url":null,"abstract":"The surface treatment of single-crystal germanium with an argon cluster ion beam has been investigated.\u0000The initial surface of germanium wafers was bombarded by argon cluster ions with high (105 eV/atom)\u0000and low (10 eV/atom) specific energy. Using an atomic force microscope, images were obtained and the\u0000surface topography was compared before and after cluster ion bombardment. Using the power spectral\u0000density function of roughness, surface smoothing is demonstrated in the range of spatial frequencies:\u00001) ν = 1 − 8 µm−1 — for the high-energy mode; 2) ν = 0.7 − 2.5 µm−1 — for low-energy mode.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"81 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141664392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Calculation of Surface Binding Energy in NixPdy Alloys Using Density Functional Theory 利用密度泛函理论计算 NixPdy 合金的表面结合能
Seriya 3: Fizika, Astronomiya Pub Date : 2024-07-09 DOI: 10.55959/msu0579-9392.79.2430303
S. S. Moskalenko, J. A. Melkozerova, A.E. Ieshkin, I. Gainullin
{"title":"Calculation of Surface Binding Energy in NixPdy Alloys Using Density Functional Theory","authors":"S. S. Moskalenko, J. A. Melkozerova, A.E. Ieshkin, I. Gainullin","doi":"10.55959/msu0579-9392.79.2430303","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2430303","url":null,"abstract":"In the study, surface binding energies for pure Ni and Pd metals were calculated using density functional\u0000theory. The values obtained were 5.32 eV and 4.65 eV, respectively, which represents good accuracy for ab\u0000initio calculations. The work also included calculations of surface binding energy for different configurations of\u0000NiPd alloys with nickel and palladium concentrations of 66%, 50%, and 33%. Calculations were performed for\u0000each type of lattice for both Ni and Pd surface binding energies. Several types of lattices were simulated, and\u0000it was found that the average surface binding energies for Ni and Pd are: 5.02 eV and 4.36 eV respectively in\u0000the alloy with a Ni concentration of 50%; 4.89 eV and 4.22 eV respectively in the alloy with a Ni concentration\u0000of 66%; 5.12 eV and 4.40 eV respectively in the alloy with a Ni concentration of 33%.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"7 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141665228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tsunami Waves off the Southeastern Coast of Sakhalin Island Caused by theEruption of the Hunga–Tonga–Hunga–Ha’apai Volcano on 15 January 2022According to Observations by Bottom Devices of Waves 根据波浪底部装置的观测，2022 年 1 月 15 日洪加-通加-洪加-哈帕伊火山爆发在萨哈林岛东南海岸引起的海啸波浪
Seriya 3: Fizika, Astronomiya Pub Date : 2024-07-09 DOI: 10.55959/msu0579-9392.79.2430901
D. Kovalev, P. Kovalev
{"title":"Tsunami Waves off the Southeastern Coast of Sakhalin Island Caused by the\u0000Eruption of the Hunga–Tonga–Hunga–Ha’apai Volcano on 15 January 2022\u0000According to Observations by Bottom Devices of Waves","authors":"D. Kovalev, P. Kovalev","doi":"10.55959/msu0579-9392.79.2430901","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2430901","url":null,"abstract":"The observation of waves (sea level oscillations) in the coastal water area of the southeastern coast of Sakhalin\u0000Island was carried out from November 2021 to May 2022 using bottom-mounted high-precision ARW 14 K\u0000devices with one second discreteness. The analysis of the obtained time series revealed the presence of\u0000anomalous waves in the range of tsunami waves in January 2022. It is shown that the waves detected on\u000015 January 2022 with periods of 15 minutes–4 hours, significantly standing out above the background, are\u0000associated with volcanic tsunami waves. Spectral analysis of the time series showed that the maximum in\u0000the spectra of sea level oscillations found after the volcanic eruption is close to the period of the first mode\u0000of the shelf seiche. This indicates that incoming tsunami waves excite shelf seiches in the coastal zone and\u0000contribute to the generation of longshore and transverse seiches into Mordvinov Bay. Time series analysis made\u0000it possible to establish that the spectral density of sea level oscillations for the time interval of the beginning\u0000of the eruption of the Hunga–Tonga–Hunga–Ha’apai volcano from 21 December 2021 to 11 January 2022\u0000significantly differs from the spectral density for the time of the Plinian volcanic eruption. An analysis of\u0000the statistical characteristics of sea level oscillations performed on two–day series in the range of periods\u00001 min–4 h for background waves and tsunamis showed an increase in the rms by 3.5 times for a time series containing tsunami waves. It has been established that for background time series containing tsunami waves,\u0000the coefficients of asymmetry and kurtosis differ little from“Gaussia” values. This indicates that the arrival\u0000of tsunami waves from distant sources does not significantly disrupt the stationarity of the wave field in the\u0000observation area.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"48 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141663264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Spectral Energy Distribution of Late Stage Stars 晚期恒星的光谱能量分布
Seriya 3: Fizika, Astronomiya Pub Date : 2024-07-09 DOI: 10.55959/msu0579-9392.79.2430801
A. Tatarnikov, S. Zheltoukhov, E. D. Malik
{"title":"Spectral Energy Distribution of Late Stage Stars","authors":"A. Tatarnikov, S. Zheltoukhov, E. D. Malik","doi":"10.55959/msu0579-9392.79.2430801","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2430801","url":null,"abstract":"This paper presents a catalog of the energy distribution in the spectra of 263 stars in the wavelength range\u00000.4 - 100 µm, which are at late stages of evolution and have been observed by the ISO space observatory.\u0000For each object in the catalog, estimates of the observed bolometric fluxes are derived from smoothed energy\u0000distribution curves. The catalog is available at https://infra.sai.msu.ru/sai_lss_sed both as a table and in\u0000machine-readable format. It is shown that for the specified sample of objects their ISO SWS spectra in\u0000the range 2.4 - 45 µm only in 60% of cases correspond to the general shape of the continuum, and can be\u0000used without recalibration. A selection of carbon stars accessible to infrared observations from the MSU\u0000observatories was made. For some of them, the first brightness estimates in the K, L, and M bands were\u0000obtained with the new IR camera of the 2.5-m telescope of CMO.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"101 37","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141666476","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of Hydrophobic Dust Particles on the Evaporation Ratefrom Water Surface 疏水性粉尘颗粒对水面蒸发率的影响
Seriya 3: Fizika, Astronomiya Pub Date : 2024-07-09 DOI: 10.55959/msu0579-9392.79.2430902
I. N. Ivanova, O. N. Melnikova
{"title":"Effect of Hydrophobic Dust Particles on the Evaporation Rate\u0000from Water Surface","authors":"I. N. Ivanova, O. N. Melnikova","doi":"10.55959/msu0579-9392.79.2430902","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2430902","url":null,"abstract":"In the paper, the effect of natural dust deposited from the air on the evaporation rate from the water surface\u0000is experimentally investigated. Experiments were conducted for stationary liquid without wind blowing across\u0000the surface and with mild wind that does not deform the surface, at a constant rate of particle deposition.\u0000It is shown that the evaporation rate is a linear function of the difference in the saturated vapor pressure at\u0000the water surface and the partial pressure of the air mixture at the temperature and relative humidity in the\u0000laboratory at the beginning of the deposition process, when the proportion of the surface covered with dust\u0000is small. With the increase in deposition time, hydrophobic particles gather into conglomerates, reducing the\u0000proportion of the exposed surface and the evaporation rate.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"97 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141664067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Generation and registration of high harmonics at surface plasma in coherent wakeemission and relativistic oscillating mirror modes by high-power laser pulses 高功率激光脉冲在相干唤醒发射和相对论振荡镜模式的表面等离子体中产生和记录高次谐波
Seriya 3: Fizika, Astronomiya Pub Date : 2024-07-09 DOI: 10.55959/msu0579-9392.79.2430401
A. V. Mitrofanov, M. Rozhko, M. M. Nazarov, N. V. Yakushkin, Ya. O. Romanovskii, A. A. Voronin, A. B. Fedotov, D. Sidorov-Biryukov
{"title":"Generation and registration of high harmonics at surface plasma in coherent wake\u0000emission and relativistic oscillating mirror modes by high-power laser pulses","authors":"A. V. Mitrofanov, M. Rozhko, M. M. Nazarov, N. V. Yakushkin, Ya. O. Romanovskii, A. A. Voronin, A. B. Fedotov, D. Sidorov-Biryukov","doi":"10.55959/msu0579-9392.79.2430401","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2430401","url":null,"abstract":"A universal technique is developed for the detection of high harmonics generated by relativistic and\u0000subrelativistic laser pulses irradiating a solid target. The characteristic features typical of two different\u0000generation methods are analyzed: parametric generation in the mid-IR range and amplification of chirped\u0000pulses in the near-IR range. Experimental spectra of harmonics in the range up to 35 nm were recorded. They\u0000can be used as a source of coherent radiation in the extreme UV region.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"43 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141663471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Phenomenological Models of Phase Transitions with Multicomponent InteractingOrder Parameters: Construction and Classification by Methods of Singularity Theoryy 具有多组分相互作用阶参数的相变现象学模型：奇点理论方法的构建与分类y
Seriya 3: Fizika, Astronomiya Pub Date : 2024-07-09 DOI: 10.55959/msu0579-9392.79.2430501
S. V. Pavlov
{"title":"Phenomenological Models of Phase Transitions with Multicomponent Interacting\u0000Order Parameters: Construction and Classification by Methods of Singularity Theoryy","authors":"S. V. Pavlov","doi":"10.55959/msu0579-9392.79.2430501","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2430501","url":null,"abstract":"Phenomenological models of phase transitions for two interacting order parameters, one–component and\u0000two-component, are constructed. The construction was carried out based on the number of control\u0000parameters depending on external thermodynamic conditions by methods of the equivariant catastrophe\u0000theory (singularity theory), taking into account the symmetry of the order parameters. The classification of\u0000phenomenological models according to the number of control parameters is carried out. Phase diagrams of\u0000the models are constructed and the theoretical temperature dependence of the heat capacity is calculated,\u0000which shows a satisfactory qualitative correspondence with the experimental dependence in the Rb2KInF6\u0000elpasolite crystal","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"94 26","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141664091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Studies of Light Scattering by Hemoglobin Moleculesunder the Effect of Iron (III) Chloride and Various pH Levels 氯化铁 (III) 和不同 pH 值影响下血红蛋白分子的光散射研究
Seriya 3: Fizika, Astronomiya Pub Date : 2024-07-09 DOI: 10.55959/msu0579-9392.79.2430402
V. V. Gibizova, G. P. Petrova, I. A. Sergeeva, K. V. Fedorova
{"title":"Studies of Light Scattering by Hemoglobin Molecules\u0000under the Effect of Iron (III) Chloride and Various pH Levels","authors":"V. V. Gibizova, G. P. Petrova, I. A. Sergeeva, K. V. Fedorova","doi":"10.55959/msu0579-9392.79.2430402","DOIUrl":"https://doi.org/10.55959/msu0579-9392.79.2430402","url":null,"abstract":"A lot of literature sources discuss diseases associated with the hemoglobin protein [1, 2]. In the modern world,\u0000more than 800 million people suffer from anemia [3]. Assessing the level of hemoglobin in the circulatory\u0000system is one of the ways to diagnose anemia. Hemoglobin protein is also a promising source of bioactive\u0000peptides [4]. The aim of the work was to identify the reasons leading to conformation changes of this protein.\u0000It still remains unclear what exactly causes disruption of its functionality. Human hemoglobin from Sigma\u0000H7379 was studied in the work; all experiments were conducted on a dynamic light scattering spectrometer —\u0000Photocor Complex. Experimental data were obtained using optical methods of static and dynamic light\u0000scattering. The work included an analysis of the behaviour of hemoglobin protein molecules in aqueous and\u0000aqueous-saline solutions with changes in solution parameters (pH, addition of iron chloride III). At values of\u0000pH< (3.56±0.15) and pH> (10.4±0.2), the hemoglobin molecule underwent conformational changes, resulting\u0000in the disintegration of the quaternary structure into αβ−dimers and individual α− and β−globules. As a\u0000result of the study, it was found that the addition of FeCl3 to aqueous solutions of hemoglobin increases the\u0000size and mass of scattering particles, which can be explained by the adsorption of Fe3+ ions on the protein\u0000surface. However, upon reaching a certain concentration of FeCl3, the pH of the solution was lowered to such\u0000an extent that it caused conformational changes in hemoglobin, leading to the disintegration of its quaternary structure. These results can be taken into account when creating medicinal drugs for the treatment of anemia\u0000and other diseases associated with the hemoglobin protein.","PeriodicalId":399279,"journal":{"name":"Seriya 3: Fizika, Astronomiya","volume":"30 43","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141835761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信