Journal of Experimental and Theoretical Physics最新文献_第6页

Lagrangian Fields and Noether Conservation Laws on Stochastic Structures 随机结构上的拉格朗日场和诺特守恒定律

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2026-09-22 DOI: 10.1134/S106377612660073X

G. Popov, V. Dzyuba

{"title":"Lagrangian Fields and Noether Conservation Laws on Stochastic Structures","authors":"G. Popov, V. Dzyuba","doi":"10.1134/S106377612660073X","DOIUrl":"10.1134/S106377612660073X","url":null,"abstract":"The discussion of stochasticity inherent in physical phenomena and processes occurring on our world is continued actively at present. For this purpose, various physical models and mathematical descriptions that are based most often on postulated are proposed. As a rule, stochasticity introduced in physical models phenomenologically, as well as its origin and mechanisms of emergence are not considered. However, the problem concerning the origin of stochasticity is far from being solved both in physical and mathematical aspects. In this article, the idea put forth by D.I. Blokhintsev and L.E. Ballentine concerning the emergence of stochasticity in classical and quantum field systems as a consequence of action of the surrounding stochastic background is developed. We are using the Lagrangian formalism and the categorically topological method of description for correct definition of the Lagrangian, action, the Euler–Lagrange equations, Noether currents, and generalized charges in stochastic surroundings. It is shown that Noether currents and conserved quantities become stochastic, and their probabilistic properties are determined by the background characteristics. The change in the action of the background on the observation interval determines the deviation of conserved quantities from their mean values, and the Heisenberg uncertainty relation can be treated as a manifestation of this stochasticity. As an illustration of the operability of a mathematical formulation of the stochasticity origin, we consider a classical scalar field. The proposed approach is naturally generalized to quantum fields. It can be used to obtain stochastic equations describing the behavior of material macroscopic systems in random fields and measurement processes.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"142 5","pages":"524 - 536"},"PeriodicalIF":1.0,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149014605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Creation of Carbon-Ceramic Cf/C–HfB2–SiC and Cf/C–ZrB2–SiC Composites and Investigation of Their Ablation Resistance at 2300°C in a High-Velocity High-Enthalpy Air Flow 碳陶瓷Cf/C - hfb2 - sic和Cf/C - zrb2 - sic复合材料的制备及其在2300℃高速高焓气流中的抗烧蚀性能研究

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2026-09-22 DOI: 10.1134/S1063776126601370

A. N. Astapov

{"title":"Creation of Carbon-Ceramic Cf/C–HfB2–SiC and Cf/C–ZrB2–SiC Composites and Investigation of Their Ablation Resistance at 2300°C in a High-Velocity High-Enthalpy Air Flow","authors":"A. N. Astapov","doi":"10.1134/S1063776126601370","DOIUrl":"10.1134/S1063776126601370","url":null,"abstract":"Work has been continued to expand the powder pre-infiltration technology for the manufacture of layered carbon-ceramic composites with matrices based on ultra-high temperature ceramics. The innovative feature of the proposed approach lies in the fact that, following the fabrication of filled carbon fiber preforms, all subsequent processing stages are fully carried out within the standard processing route for Cf/C composites (f-fibers). Composites of Cf/C–HfB2–20 vol % SiC and Cf/C–ZrB2–20 vol % SiC compositions with open porosity, ultimate strength, and flexural elastic modulus of 10–12%, 98–104 MPa, and 6.5–7.0 GPa, respectively, were prepared. The results of their fire tests at surface temperature Tw = 2300°C under the influence of a high-speed air–gas flame flow lasting 500 s are presented. The average rate of linear material removal of composites as a result of ablation was 1.2 and 2.8 µm/s, respectively. The mechanisms of ablation resistance of composites have been established. It is shown that the in situ formation of a multilayer heterogeneous structure of oxide films causes a change in the oxidation from kinetic to diffusion mode. It is found that the substitution of ZrB2 for HfB2 in the composite matrix accelerates the counter mass transfer of reagents through the film and reduces resistance to ablation. The main reasons for this are analyzed.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"142 5","pages":"645 - 653"},"PeriodicalIF":1.0,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149014600","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Optimization of High-Efficiency FASnI3 Based Perovskite Solar Cells via SCAPS-1D 基于SCAPS-1D的高效FASnI3钙钛矿太阳能电池的数值优化

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2026-09-22 DOI: 10.1134/S1063776126600698

Ali Zamil Manshad, Natheer Jamal Imran, Esraa Aial Hassan

引用次数: 0

Physicochemical Features of Methane Hydrate Formation within a Hybrid Cellulose-Based Material 纤维素基杂化材料中甲烷水合物形成的物理化学特征

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2026-09-22 DOI: 10.1134/S1063776126601333

M. Yarakhmedov, D. Sergeeva, M. Rubtsova, A. Semenov, V. Vinokurov, A. Stoporev

{"title":"Physicochemical Features of Methane Hydrate Formation within a Hybrid Cellulose-Based Material","authors":"M. Yarakhmedov, D. Sergeeva, M. Rubtsova, A. Semenov, V. Vinokurov, A. Stoporev","doi":"10.1134/S1063776126601333","DOIUrl":"10.1134/S1063776126601333","url":null,"abstract":"The development of advanced porous matrices that promote efficient and reversible gas hydrate formation is critical for applications in energy storage and gas transportation. This study investigates the physicochemical characteristics of methane hydrate formation within hybrid cellulose-based fibers, presenting a comparative analysis of carboxylated nanofibrillar cellulose (CNC) and the CNC grafted with polyacrylonitrile chains (CNC-g-PAN). The properties of cellulose-based hydrate carriers were characterized using FT‑IR spectroscopy and thermogravimetric analysis. The materials were tested with water contents of 45 and 60 wt % (CNC45, CNC60, CNC-g-PAN45, and CNC-g-PAN60) under a constant initial pressure of 10.3 MPa, undergoing temperature cycling between 25°C and target formation temperatures of 0.9°C or ‒3°C. Results demonstrate that the grafting modification significantly enhances hydrate formation capacity. While the water-to-hydrate conversion for CNC45 and CNC60 was 63% and 35% respectively at 0.9°C, grafting polyacrylonitrile increased these values to 78 and 58% under identical conditions. This marked improvement, attributed to the modified surface properties of the hybrid material, underscores its potential as an effective medium for the cyclic production and decomposition of gas hydrates. The findings provide valuable physicochemical insights for designing next-generation hydrate carriers, with direct implications for technologies in gas sequestration and thermal energy storage.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"142 5","pages":"629 - 637"},"PeriodicalIF":1.0,"publicationDate":"2026-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149014595","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

GUT Monopole Search with the Help of Baikal NT200 Neutrino Detector 借助贝加尔NT200中微子探测器的GUT单极子搜索

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2026-09-22 DOI: 10.1134/S1063776126601266

O. N. Gaponenko

引用次数: 0

Mechanics of a Quantum 量子力学

IF 1 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2026-08-30 DOI: 10.1134/S1063776126700044

S. I. Igolkin

引用次数: 0

Modification of the Structure and Properties of Fluoropolymer Composites by Ultraviolet Radiation 紫外辐射对含氟聚合物复合材料结构和性能的改性

IF 0.8 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2026-06-10 DOI: 10.1134/S1063776126600431

E. V. Vinogradov, V. G. Luhin, N. G. Valko

{"title":"Modification of the Structure and Properties of Fluoropolymer Composites by Ultraviolet Radiation","authors":"E. V. Vinogradov, V. G. Luhin, N. G. Valko","doi":"10.1134/S1063776126600431","DOIUrl":"10.1134/S1063776126600431","url":null,"abstract":"The influence of ultraviolet radiation with wavelengths of 207 and 222 nm on the performance properties of fluoropolymer composites was investigated. A fluoropolymer composite with carbon fiber, widely used in the automotive industry, was chosen as the object of study. It was found that irradiating the fluoropolymer for 1 h with UV radiation at a wavelength of 207 nm leads to an increase in wear resistance by 19% and surface layer hardness by 6%. After exposure to UV radiation with a wavelength of 222 nm, wear resistance increases by 17% and surface layer hardness by 4%. The increase in the hardness of the fluoropolymer is accompanied by a corresponding decrease in plasticity. It was established that with a decrease in the wavelength of UV radiation, the degree of reduction in plasticity increases. The plasticity of the fluoropolymer composite decreases by 8% after UV irradiation at a wavelength of 222 nm, and by 13% after UV irradiation at a wavelength of 207 nm. The results of the work demonstrate the potential of directed UV modification of fluoropolymers for creating wear-resistant polymer products operating under conditions of radiation exposure.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"142 3","pages":"291 - 296"},"PeriodicalIF":0.8,"publicationDate":"2026-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148202904","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physicomechanical Characteristics of Climatically Stable Basalt Plastics in Extremely Cold Climatic Conditions 气候稳定的玄武岩塑料在极寒气候条件下的物理力学特性

IF 0.8 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2026-06-10 DOI: 10.1134/S106377612660025X

A. K. Kychkin, A. A. Gavrilieva, M. P. Lebedev, A. A. Kychkin, A. A. Gabyshev, A. E. Markov

{"title":"Physicomechanical Characteristics of Climatically Stable Basalt Plastics in Extremely Cold Climatic Conditions","authors":"A. K. Kychkin, A. A. Gavrilieva, M. P. Lebedev, A. A. Kychkin, A. A. Gabyshev, A. E. Markov","doi":"10.1134/S106377612660025X","DOIUrl":"10.1134/S106377612660025X","url":null,"abstract":"We consider the climatic stability of basalt plastic composites manufactured from basalt of the Vasilyevskoe deposit in Yakutia. The results of natural tests of reinforcement and laminates confirm the advantage of these materials over glass plastics as regards their strength, moisture resistance, and stability to thermocycling. The expedience of application of basalt plastic composites in northern regions is substantiated. It is shown that in contrast to glass plastics, basalt plastics at early stages of exposure become stronger due to post-curing and reduction of internal stresses, and noticeable degradation becomes dominant after prolonged exposure (~10 years). Analysis of thermomechanical parameters has revealed the decrease in the linear expansion coefficient and the formation of a rigid surface zone. At present, the possibility of obtaining various basalt plastic composites that are cheaper than carbon plastics and stronger than glass plastics after climatic ageing has been proved, which renders them a promising alternative for building in Northern regions.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"142 3","pages":"259 - 267"},"PeriodicalIF":0.8,"publicationDate":"2026-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148202929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Unified Dark Sector from Dynamical-Ledger Drift 动态分类帐漂移的统一暗区

IF 0.8 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2026-06-10 DOI: 10.1134/S1063776126600583

Daegene Song

{"title":"A Unified Dark Sector from Dynamical-Ledger Drift","authors":"Daegene Song","doi":"10.1134/S1063776126600583","DOIUrl":"10.1134/S1063776126600583","url":null,"abstract":"We propose a unified dark-sector interpretation of dynamical-ledger quantum gravity in which context drift, forced by moving-reference modular bookkeeping, admits an effective local completion that behaves cosmologically as both cold dark matter and a time-dependent vacuum response. The dynamical ledger adds a compulsory drift term to fixed-reference balance; under a representability hypothesis this drift compresses to a conserved stress tensor that can be treated as a single dark sector. On homogeneous backgrounds, conservation of the single drift-sector tensor implies an exact exchange identity for its vacuum-like/matter-like decomposition, where the vacuum-like piece has equation of state (p = - rho ) and the matter-like piece can behave as dust. We argue that a nonabelian completion provides a plausible route to a mass gap supporting a cold component, while covariance together with screen-scale coarse-graining motivates a leading background-effective vacuum response whose reduced running-vacuum parameterization can be taken of H2 type. The framework produces algebraic constraints tying vacuum fraction and dark-matter fraction at the background level.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"142 3","pages":"285 - 290"},"PeriodicalIF":0.8,"publicationDate":"2026-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148202930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A Comparative Study of the Mechanical Properties and Swelling Resistance of Diene Rubber-Based Nanocomposites Reinforced by Pristine and Surface-Functionalized Carbon Nanotubes 原始碳纳米管与表面功能化碳纳米管增强二烯橡胶基纳米复合材料力学性能及抗膨胀性能的比较研究

IF 0.8 4区物理与天体物理

Journal of Experimental and Theoretical Physics Pub Date : 2026-06-10 DOI: 10.1134/S1063776126600273

S. Vishvanathperumal, K. N. Ramu

{"title":"A Comparative Study of the Mechanical Properties and Swelling Resistance of Diene Rubber-Based Nanocomposites Reinforced by Pristine and Surface-Functionalized Carbon Nanotubes","authors":"S. Vishvanathperumal, K. N. Ramu","doi":"10.1134/S1063776126600273","DOIUrl":"10.1134/S1063776126600273","url":null,"abstract":"This study investigates the effects of pristine carbon nanotubes and surface-functionalized carbon nanotubes modified with 3-aminopropyltriethoxysilane, bis(triethoxysilylpropyl)tetrasulfide, and 1-octadecanol on the performance of nanostructured blends based on ethylene propylene diene rubber and styrene–butadiene rubber. Particular emphasis is placed on rheometric characteristics, mechanical behavior, morphological features, abrasion resistance, swelling resistance, compression set, and crosslink density. The filler concentration was varied from zero to eight parts per hundred rubber. With increasing filler content, the minimum torque, maximum torque, torque difference, and cure rate index showed consistent enhancement, accompanied by a reduction in scorch time and optimum cure time. Regardless of the carbon nanotube modification type, higher loadings resulted in increased compound viscosity, accelerated curing, elevated crosslink density, and improved abrasion resistance and hardness. Tear strength, compression set, and swelling resistance exhibited continuous improvement across all systems with increasing filler content. Tensile strength increased up to an optimum loading of five parts per hundred rubber, followed by a decline at higher concentrations, with maximum enhancements of 99, 144, 177, and 206% for systems filled with pristine carbon nanotubes and the three modified carbon nanotubes, respectively. Corresponding increases in modulus at one hundred percent elongation were 29, 40, 51, and 58%, while elongation at break decreased by 20, 24, 28, and 34%. Tear strength improved by 73, 109, 134, and 167%, whereas rebound resilience declined by 46, 51, 59, and 64% for the respective filler systems. Finally, the overall performance of the carbon nanotube-reinforced blends was benchmarked against previously reported nanofiller-reinforced ethylene propylene diene rubber and styrene–butadiene rubber formulations in the literature.","PeriodicalId":629,"journal":{"name":"Journal of Experimental and Theoretical Physics","volume":"142 3","pages":"297 - 328"},"PeriodicalIF":0.8,"publicationDate":"2026-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148202931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0