物理最新文献

{"title":"Fermionic quantum cosmology as a framework for resolving type IV singularities","authors":"Paweł Kucharski,&nbsp;Adam Balcerzak","doi":"10.1140/epjc/s10052-025-14615-x","DOIUrl":"10.1140/epjc/s10052-025-14615-x","url":null,"abstract":"<div><p>In this paper, we present an innovative approach to resolving type IV singularities in fermionic quantum cosmology. The Eisenhart–Duval lift procedure is employed to construct an extended minisuperspace metric, which allows for the formulation of the Dirac equation in minisuperspace. Through this approach, fermionic degrees of freedom are effectively incorporated into a homogeneous and isotropic cosmological model with a scalar field. By applying a kind of the Born-Oppenheimer approximation, solutions to the Dirac equation for an approximate potential characteristic of type IV singularities are obtained, expressed in terms of Tricomi confluent hypergeometric functions and associated Laguerre polynomials. The elimination of non-physical, divergent solutions results in a quantum regularization of the classical singularity. These results indicate the potential of fermionic models in quantum cosmology for mitigating the singularity problem.\u0000\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 8","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14615-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Photon–glass interactions in praseodymium (III, IV) oxide nanoparticle-modified tellurite glasses: structural and shielding correlations","authors":"G. Kilic","doi":"10.1007/s00339-025-08858-4","DOIUrl":"10.1007/s00339-025-08858-4","url":null,"abstract":"<div><p>This study aimed to investigate the changes in physical, optical and gamma radiation shielding properties by incorporating Pr₆O₁₁ nanoparticles (nps) into zinc-tellurium oxyfluoride (TeO₂-ZnO-ZnF₂) glass composition, which has not been studied before. Four doped and undoped glasses were synthesized by melt-quenching method by adding 0,1,3, and 5 mol% Pr₆O₁₁(np) nanoparticles to 70%TeO₂-15%ZnO-15%ZnF₂ structure. Structural, optical and gamma radiation shielding properties of synthesized glasses were characterized by XRD, UV-Vis spectroscopy and Phy-X/PSD program. XRD analyses showed that glasses were amorphous and Pr₆O₁₁(np) additive did not cause crystallization. Density increased from 5.496 to 5.663 g/cm³ and molar volume increased from 25.3688 to 32.4091 cm³/mol with increasing Pr₆O₁₁(np) concentration. This situation revealed an expansion in the network structure and an increase in density. Optical analysis showed that the doped glasses exhibited absorption peaks specific to Pr³⁺ ions in the range of 449–1017 nm, and the optical band gap of the glasses decreased from 3.121 to 2.690 eV depending on the doping ratio. Urbach energy increased from 0.172 to 0.252 eV, indicating that structural order was disrupted, and decreased at high concentrations, indicating that the structure started to re-order. Radiation shielding properties were characterized with the parameters of mass attenuation coefficient (MAC), linear attenuation coefficient (LAC), half-value layer (HVL) and effective atomic number (Z_eff). MAC increased from 53.51 to 54.88 cm²/g at 0.015 MeV, LAC increased from 294.12 to 310.78 cm⁻¹ and HVL decreased from 0.0024 to 0.0022 cm⁻¹, indicating that Pr₆O₁₁(np) doping improved the shielding performance by enhancing photoelectric interactions at low energies. At high energies, the differences due to Compton scattering and pair production decreased. EBF and EABF values ​​decreased with Pr₆O₁₁(np), confirming the suppression of secondary radiation. In conclusion, Pr₆O₁₁(np) doping improves both the optical and radiation shielding properties of zinc-tellurium oxyfluoride glasses, offering potential for nuclear security and optoelectronic applications.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 9","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832368","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Laser-induced surface acoustic wave spectroscopy of wurtzite AlYN thin films","authors":"Dmytro I. Solonenko,&nbsp;Nastaran Behravan,&nbsp;Tamara Terzic,&nbsp;Martin Zawischa,&nbsp;Alexander Shatalov,&nbsp;Marco Deluca,&nbsp;Mohssen Moridi,&nbsp;Gudrun Bruckner","doi":"10.1007/s00339-025-08814-2","DOIUrl":"10.1007/s00339-025-08814-2","url":null,"abstract":"<div><p>We present an investigation of aluminum yttrium nitride (Al<span>(_{1-x})</span>Y<span>(_{x})</span>N) thin films synthesized via reactive magnetron co-sputtering on 200-mm silicon substrates. While scandium-alloyed aluminum nitride exhibits superior piezoelectric performance, its commercial adoption is limited by scandium’s high costs and supply vulnerabilities. Yttrium offers a promising alternative with similar property enhancements at improved economic viability. This study reports for the first time an experimental determination of the elastic properties of Al<span>(_{1-x})</span>Y<span>(_{x})</span>N as a function of Yttrium content by means of laser-induced surface acoustic wave spectroscopy, which demonstrated exceptional sensitivity and measurement reproducibility for determining critical film parameters including Young’s modulus, density, and thickness. Our results confirm theoretical predictions of lattice softening with increasing yttrium concentration, with deviations attributed to microstructural features of sputter-deposited films. Yttrium content was modulated through power density control, affecting film thickness and residual stress. These previously unreported properties provide critical insights for implementing Al<span>(_{1-x})</span>Y<span>(_{x})</span>N in microelectromechanical systems, particularly for radio-frequency applications where knowledge of Young’s modulus and acoustic velocity is essential.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 9","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832109","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multidisciplinary approaches to microstructural impacts on strength and fracture: from fundamental equations to machine learning techniques","authors":"Mahdieh Tajabadi Ebrahimi,&nbsp;Mahdi Fakoor","doi":"10.1007/s00339-025-08804-4","DOIUrl":"10.1007/s00339-025-08804-4","url":null,"abstract":"<div><p>Impurities significantly affect the properties of materials. Understanding and addressing their effects requires a comprehensive, interdisciplinary approach integrating principles from physics, mechanics, materials science, and mathematics and involves solving fundamental equations of electromagnetism, elasticity, and thermodynamics. In this study, we first acknowledge the multidisciplinary nature of the problem and how scientists have utilised various methods and simulation tools from different fields of science. We aim to illustrate the evolution of research about multi-object challenges in physics and demonstrate the applicability of these concepts and methodologies within micromechanics. Next, we reviewed the responses of impurities to external mechanical, thermal, electric, and magnetic fields. Subsequently, we delve into the limitations of analytical and simulation research in advancing the field and explore how scientists can overcome challenges by using hybrid methods and machine learning. Finally, we provide a comprehensive review of machine learning methods for predicting the role of microstructures on the strength and fracture of materials.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":"131 9","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fission product mass distribution studies in 35Cl + 176Yb and 35Cl + 165Ho reactions","authors":"S. Kumar,&nbsp;R. Tripathi,&nbsp;S. Patra,&nbsp;A. Mhatre,&nbsp;A. Kumar,&nbsp;K. Ramachandran,&nbsp;T. N. Nag,&nbsp;S. Santra","doi":"10.1140/epja/s10050-025-01655-w","DOIUrl":"10.1140/epja/s10050-025-01655-w","url":null,"abstract":"<div><p>Many studies on the fission fragment mass distribution in the sub-lead and pre-actinide region have proposed the presence of asymmetric components in this mass region, primarily due to proton shells corresponding to Z ≈ 36, 38. Present studies have been carried out to investigate the mass distributions in the ³⁵Cl + ¹⁷⁶Yb → ²¹¹Fr and ³⁵Cl + ¹⁶⁵Ho → ²⁰⁰Po reactions in the mass region around ~ 200, a transition between the sub-lead and actinide region. Mass distribution studies have been carried out near the entrance channel Coulomb barrier using the recoil catcher technique, followed by off-line γ-ray spectrometry of the fission products. The broad Gaussian nature of the mass distribution in the ³⁵Cl + ¹⁷⁶Yb reaction indicates a dominant symmetric fission contribution. The mass distributions for the ³⁵Cl + ¹⁷⁶Yb and ³⁵Cl + ¹⁶⁵Ho reactions were found to be in gross agreement with GEF (Schmidt et al<i>.</i> in Nucl Data Sheets 131:107, 2016; Schmidt and Jurado in Rep Prog Phys 81:106301, 2018). The GEF model predicts a dominant symmetric fission contribution along with the contribution from the asymmetric fission mode corresponding to <i>Z</i> ≈ 38. The most probable charge, Z_P was varied within a range of ± 1.5 units with respect to that obtained using the unchanged charge density hypothesis to obtain the best agreement with GEF. However, a few experimental mass yields in the mass regions corresponding to Z ≈ 50–52 and <i>Z</i> ≈ 54–56 were observed to be still higher (more than ~ 50%) compared to the GEF predictions. A similar enhancement observed in the corresponding fission product yields indicates possible contributions from the conventional asymmetric fission modes, in addition to the shell corresponding to Z ≈ 38.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 8","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-025-01655-w.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimisation of integrated luminosity in a circular collider with application to the LHC Run 2","authors":"F. Capoani,&nbsp;A. Bazzani,&nbsp;B. Giacobbe,&nbsp;M. Giovannozzi","doi":"10.1140/epjp/s13360-025-06708-z","DOIUrl":"10.1140/epjp/s13360-025-06708-z","url":null,"abstract":"<div><p>Circular collider designs are tailored to maximise luminosity delivered to experimental detectors, effectively utilising the charged beams that have been accelerated for collisions. In reality, the key metric for the effective operation of a circular collider is the integrated luminosity provided to the experiments, which can significantly differ from the theoretical capability regarding instantaneous luminosity of the accelerator. Several factors influence the collection of integrated luminosity, with the most critical being the duration of each physics fill. This paper presents and examines strategies for determining optimal fill durations based on actual fill conditions, applying these methods to public luminosity data measured by the ATLAS detector during the LHC Run 2, covering the physics runs from 2016 to 2018.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 8","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjp/s13360-025-06708-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Revised QCD effects on the Z (rightarrow ,boverline{b}) forward–backward asymmetry in (e^+e^-) collisions","authors":"David d’Enterria,&nbsp;Cynthia Yan","doi":"10.1140/epja/s10050-025-01656-9","DOIUrl":"10.1140/epja/s10050-025-01656-9","url":null,"abstract":"<div><p>The forward–backward (FB) asymmetry of <i>b</i> quarks in <span>(e^+e^-)</span> collisions at the Z pole measured at LEP, <span>(A_{_{textsc {fb}}}^{0,b}= 0.0992pm 0.0016)</span>, remains today one of the electroweak precision observables with the largest disagreement (2.4<span>(sigma )</span>) with respect to the Standard Model prediction, <span>((A_{_{textsc {fb}}}^{0,b})_{_textrm{th}} = 0.1030 pm 0.0002)</span>. Beyond the dominant statistical uncertainties, QCD effects, such as <i>b</i>-quark showering and hadronization, are the leading sources of <span>(A_{_{textsc {fb}}}^{0,b})</span> systematic uncertainty, and have not been revised in the last twenty years. We reassess the QCD uncertainties of the eight original <span>(A_{_{textsc {fb}}}^{0,b})</span> LEP measurements, using modern parton shower <span>pythia</span> 8 and <span>vincia</span> simulations with nine different implementations of soft and collinear radiation as well as of parton fragmentation. Our analysis, combined with NNLO massive <i>b</i>-quark corrections independently computed, indicates total propagated QCD uncertainties of <span>(sim )</span>0.7% and <span>(sim )</span>0.3% for the lepton- and jet-charge analyses, respectively, that are about a factor of two smaller than those of the original LEP results. Accounting for such updated QCD effects leads to a new <span>(A_{_{textsc {fb}}}^{0,b}= 0.0995pm 0.0016)</span> average, with a data-theory tension slightly reduced from 2.4<span>(sigma )</span> to 2.2<span>(sigma )</span>. Confirmation or resolution of this long-term discrepancy requires a new high-luminosity <span>(e^+e^-)</span> collider collecting orders-of-magnitude more data at the Z pole to significantly reduce the dominant <span>(A_{_{textsc {fb}}}^{0,b})</span> statistical uncertainties, and to improve our understanding of <i>b</i>-quark showering and hadronization.</p></div>","PeriodicalId":786,"journal":{"name":"The European Physical Journal A","volume":"61 8","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epja/s10050-025-01656-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832058","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microparticle mechanical vibration frequency sensor: modeling and detection algorithm","authors":"Mahmood Fakher,&nbsp;Davood Younesian","doi":"10.1140/epjp/s13360-025-06688-0","DOIUrl":"10.1140/epjp/s13360-025-06688-0","url":null,"abstract":"<div><p>The vibrational frequencies of microparticles contain critical information about their physical state. However, direct frequency measurement remains a significant challenge, which can be addressed by designing sensors that couple particle vibrations to resonator modes in a controlled manner. Accordingly, this study first examines how dynamic interactions between foreign particles and resonator-based micro-sensors alter their vibrational response. Subsequently, a framework for designing microparticle frequency sensors is proposed, along with an algorithm to detect particle frequency using resonator data. To achieve these objectives, analytical and finite element (FE) models are developed to analyze the vibrations of a cantilever beam carrying an elastic particle. Additionally, an inverse problem-solving algorithm is introduced to simultaneously identify the particle’s mass, position, and fundamental frequency. The results reveal that when the particle’s fundamental frequency falls within the resonator’s natural frequency range, conventional mass detection methods relying on the point-mass model fail. However, this work demonstrates that a single resonator can effectively measure both mass and frequency of microparticles—provided the resonator and particle properties (mechanical and geometric) are appropriately selected. Finally, the proposed algorithm’s performance is evaluated across different particle cases, confirming its efficacy in detecting mass, position, and frequency with high accuracy.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 8","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144832091","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}

{"title":"Simulation of subsurface particle radiation and leakage flux on the moon from solar energetic particles and galactic cosmic rays","authors":"Zhengbao Wei,&nbsp;Yongbo Huang,&nbsp;Yaping Cheng","doi":"10.1140/epjc/s10052-025-14619-7","DOIUrl":"10.1140/epjc/s10052-025-14619-7","url":null,"abstract":"<div><p>The moon is continuously bombarded by cosmic rays, primarily Galactic Cosmic Rays (GCR) and Solar Cosmic Rays, which generate complex secondary radiation in the lunar subsurface. Secondary radiation is a critical factor that must be considered in the design of radiation protection for future manned lunar missions and the construction of lunar research bases. Based on previous studies, this study employs the Geant4 to simulate the secondary radiation produced by nuclei from hydrogen to nickel in GCR, with a particular focus on the neutron number density and flux at a depth of 10 ms below the lunar surface. The results indicate that when the abundance of heavy elements from lithium to nickel in GCR is less than 1%, their contribution to the neutron number density exceeds 6%. Additionally, we analyzed the leakage fluxes of neutrons, gamma rays, protons, and electrons during the months of strongest and weakest solar modulation from 1951 to 2016. The total neutron leakage fluxes were 1.59 n/<span>(hbox {cm}^2)</span>-s and 3.85 n/<span>(hbox {cm}^2)</span>-s, respectively, with the leakage flux proportions of the three neutron types all below 2%. Furthermore, we simulated the total leakage of neutrons and gamma rays in the energy range of 10⁻⁹ to 10⁴ MeV during the second extreme Solar Energetic Particle (SEP) event in 2003, which lasted for 33 h. The neutron leakage during this event was 4.6 times and 1.9 times higher than during the months of strongest and weakest solar modulation, respectively; while the gamma ray leakage was 14.5 times and 6.6 times higher, respectively.\u0000</p></div>","PeriodicalId":788,"journal":{"name":"The European Physical Journal C","volume":"85 8","pages":""},"PeriodicalIF":4.8,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1140/epjc/s10052-025-14619-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843316","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An adaptive recalibrative contextual squeeze-and-excitation self-attention V-Net for kidney tumor segmentation in RCC imaging","authors":"C. Pabitha,&nbsp;S. Benila,&nbsp;B. Vanathi","doi":"10.1140/epjp/s13360-025-06686-2","DOIUrl":"10.1140/epjp/s13360-025-06686-2","url":null,"abstract":"<div><p>Accurate and efficient kidney tumor segmentation in renal cell carcinoma (RCC) imaging is essential for early diagnosis and surgical intervention. However, existing models struggle with class imbalance, small tumor detection, boundary irregularities, and imaging variations across CT protocols, limiting their clinical applicability and generalization. To address these challenges, we propose an advanced segmentation framework called as Adaptive Recalibrative Contextual Squeeze-and-Excitation Self-Attention V-Net (ARCSAV-Net). The novel ARCSAV-Net combines various innovations in the traditional V-Net architecture to more effectively segment kidney tumors in RCC images. First, Adaptive Recalibrative Contextual Squeeze-and-Excitation (AR-CSE) Blocks enhance feature prioritization by utilizing radiomic biomarkers such as entropy and vascular features to reduce class imbalance and tumor heterogeneity. Second, the Self-Attention V-Net Mechanism enhances boundary definition by reducing redundant features and enhancing focus on low-contrast and small tumors to enhance segmentation accuracy. Third, Task-Switching Self-Supervision (TSSS) reinforces feature learning through alternating between primary segmentation and secondary tasks such as rotation and intensity prediction to mitigate overfitting and enhance model robustness. Second, Context-Based Confidence Estimation (CBCT) strengthens uncertain predictions to impose consistency on segmentation across varying imaging protocols. Lastly, Bayesian Hyperparameter Optimization (ML-TPE) adjusts model parameters with low computational overhead, reducing computational overhead while ensuring generalization. Experimental results on KiTS19 and KiTS21 datasets demonstrate that AR-CSE-SAV-Net achieves better segmentation performance, with a Dice Similarity Coefficient (DSC) of 0.985, Volumetric Overlap Error (VOE) of 0.16, and Mean Surface Distance (MSD) of 0.6 mm, significantly outperforming existing methods in accuracy and inference speed.</p></div>","PeriodicalId":792,"journal":{"name":"The European Physical Journal Plus","volume":"140 8","pages":""},"PeriodicalIF":2.9,"publicationDate":"2025-08-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144843323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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}