Science China Physics, Mechanics & Astronomy最新文献_第3页

Revealing and predicting the long-term biomechanical response of orthokeratology by developing a patient-specific computational model 通过开发针对患者的计算模型，揭示并预测角膜矫形术的长期生物力学反应

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2024-11-21 DOI: 10.1007/s11433-024-2487-6

Yifeng Li, Zhuoran Yang, Ziming Yan, Huibin Shi, Zhanli Liu, Kaijie Wang

{"title":"Revealing and predicting the long-term biomechanical response of orthokeratology by developing a patient-specific computational model","authors":"Yifeng Li, Zhuoran Yang, Ziming Yan, Huibin Shi, Zhanli Liu, Kaijie Wang","doi":"10.1007/s11433-024-2487-6","DOIUrl":"10.1007/s11433-024-2487-6","url":null,"abstract":"<div>Orthokeratology (OK) is widely used for effective myopia correction and control. However, the incomplete understanding of its biomechanical mechanisms makes OK lens fitting rely heavily on clinician judgment, complicating accurate predictions of treatment outcomes. In this paper, we performed clinical experiments and numerical analysis to study corneal deformation modes and long-term changes in central corneal thickness. Clinical experiments were conducted on 194 Chinese myopic patients under OK treatment for 3 months. Based on the experimental data, a patient-specific computational biomechanical model for OK was established and validated. Specifically, the anisotropic mechanical properties of the cornea were incorporated into the model to describe the significant difference between its shear modulus (29.5 kPa) and tensile modulus (768.4 kPa). Additionally, a visco-hyperelastic material model with a prolonged corneal relaxation time of 5.6 h was developed to capture the long-term deformation response. The results show that corneal thickness reduction in OK is primarily due to out-of-plane shear deformation, influenced by the cornea’s low shear resistance. Modeling the extended corneal relaxation time is crucial for predicting long-term biomechanical responses. The computational model effectively captures long-term changes in central corneal thickness, potentially improving OK lens fitting accuracy.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142691879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Sky location of massive black hole binaries in the foreground of Galactic white dwarf binaries 银河系白矮星双星前景中的大质量黑洞双星的天空位置

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2024-11-21 DOI: 10.1007/s11433-024-2505-1

Pan Guo, Hong-Bo Jin, Cong-Feng Qiao, Yue-Liang Wu

{"title":"Sky location of massive black hole binaries in the foreground of Galactic white dwarf binaries","authors":"Pan Guo, Hong-Bo Jin, Cong-Feng Qiao, Yue-Liang Wu","doi":"10.1007/s11433-024-2505-1","DOIUrl":"10.1007/s11433-024-2505-1","url":null,"abstract":"<div>For space-based gravitational wave (GW) detection, the main noise source for massive black hole binaries (MBHBs) is attributed to approximately 107 double white dwarf binaries in the foreground. For a GW source, the amplitude of the detector response, recorded by a space-based gravitational wave detector, exhibits a modulation effect with a year period when observing the source from various orbital positions. Under the adverse conditions mentioned above, where there is a strong foreground noise and annual modulation in the signals, we employed the wavelet transform and the strong-amplitude relevant orbital position search methods, which allows the weak MBHB sources to achieve higher locating accuracy. In detail, for two MBHB sources of lower intensity, the precision of luminosity distance, represented by the ratio ΔDL/DL at the 95% confidence level, is enhanced by factors of ∼2. The angular resolutions, denoted by ΔΩs, are enhanced by a factor of ∼20. These improvements increase the number of detectable GW sources, facilitate multi-messenger follow-up observations and provide constraints on the cosmological constant.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142691876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Disordered hyperuniformity and thermal transport in monolayer amorphous carbon 单层无定形碳的无序超均匀性和热传输

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2024-11-18 DOI: 10.1007/s11433-024-2523-4

Nianjie Liang, Yuxi Wang, Bai Song

{"title":"Disordered hyperuniformity and thermal transport in monolayer amorphous carbon","authors":"Nianjie Liang, Yuxi Wang, Bai Song","doi":"10.1007/s11433-024-2523-4","DOIUrl":"10.1007/s11433-024-2523-4","url":null,"abstract":"<div>Disordered hyperuniformity (DHU) is a recently discovered novel state of amorphous systems characterized by strongly suppressed density fluctuations at large length scales as in crystalline materials, which offers great potential for achieving unusual mechanical, electronic, and photonic properties. However, despite the fundamental and technological importance of thermal transport in amorphous solids, the effect of DHU remains largely unexplored. Here, we theoretically study thermal transport in a class of two-dimensional DHU materials—monolayer amorphous carbon (MAC). Beginning with a perfect graphene lattice, we continuously apply Stone-Wales transformations to generate a series of MAC models with varied degrees of disorder and defects, which are quantified through comprehensive structural analysis including the so-called hyperuniformity index (H), where a smaller H indicates a higher degree of hyperuniformity. Subsequently, we conduct molecular dynamics simulations to obtain the thermal conductivity (κ). A significant correlation between the thermal transport behavior and degree of hyperuniformity is observed, with the room-temperature κ decreasing from 26.3 to 5.3 W m−1 K−1 while H is tuned from 0.0004 to 0.024. Remarkably, two distinct transport regimes are identified, including a nearly-DHU regime at small H (< 0.005) where κ drops sharply and a non-DHU region at larger H where κ becomes relatively flat. Mode-resolved analysis reveals longer lifetime and higher participation ratio for the heat carriers in nearly-DHU MAC, implying that the hidden long-range correlations could support extended modes that enhance transport. Our work highlights the impact of DHU on the thermal properties of amorphous materials and represents a conceptual advancement that is worthy of future exploration.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 2","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Holographic images of a charged black hole in Lorentz symmetry breaking massive gravity 洛伦兹对称破缺大质量引力中带电黑洞的全息图像

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2024-11-18 DOI: 10.1007/s11433-024-2526-4

Xiao-Xiong Zeng, Li-Fang Li, Pan Li, Bo Liang, Peng Xu

{"title":"Holographic images of a charged black hole in Lorentz symmetry breaking massive gravity","authors":"Xiao-Xiong Zeng, Li-Fang Li, Pan Li, Bo Liang, Peng Xu","doi":"10.1007/s11433-024-2526-4","DOIUrl":"10.1007/s11433-024-2526-4","url":null,"abstract":"<div>Using the AdS/CFT correspondence, this paper investigates the holographic images of a charged black hole within the context of Lorentz symmetry breaking massive gravity. The photon rings, luminosity-deformed rings, or light points from various observational perspectives are obtained. We also study the influences of both the chemical potential and temperature on the Einstein ring. Unlike the previous work, which primarily examines the effect of chemical potential on ring radius at high temperatures and find no change in the radius with varying chemical potential, we also investigate the effect of chemical potential on the ring radius at low temperature besides at high temperature. Our findings indicate that at low temperatures, the photon ring radius decreases with increasing of chemical potential, while at high temperatures, the results are consistent with previous studies. Additionally, we explore the impact of the model parameter λ on the Einstein ring radius and find the the ring radius increases as the model parameter λ increases. More interestingly, for the large chemical potential, u = 1, the temperature dependence of the photon ring radius is reversed for λ = 2 and λ = 4. Conversely, for a small chemical potential u = 0.1, the temperature dependence of the Einstein ring stays the same as λ = 2 and λ = 4.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 2","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679794","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Vector meson’s spin alignments in high energy reactions 高能反应中的矢量介子自旋排列

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2024-11-15 DOI: 10.1007/s11433-024-2495-1

Jin-Hui Chen, Zuo-Tang Liang, Yu-Gang Ma, Xin-Li Sheng, Qun Wang

{"title":"Vector meson’s spin alignments in high energy reactions","authors":"Jin-Hui Chen, Zuo-Tang Liang, Yu-Gang Ma, Xin-Li Sheng, Qun Wang","doi":"10.1007/s11433-024-2495-1","DOIUrl":"10.1007/s11433-024-2495-1","url":null,"abstract":"<div>The global spin alignment of vector mesons has been observed by the STAR collaboration at the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory (BNL). It provides a unique opportunity to probe the correlation between the polarized quark and antiquark in the strongly coupled quark-gluon plasma (sQGP) produced in relativistic heavy ion collisions, opening a new window to explore the properties of sQGP. In addition, spin alignments of vector mesons have also been observed in other high-energy particle collisions such as e+e− annihilations at high energies where hadron production is dominated by quark fragmentation mechanism. The results obtained are quite different from those obtained in heavy ion collisions where quark coalescence/combination mechanism dominates suggesting strong dependence on hadronization mechanisms. So comprehensive studies in different hadronization processes are needed. In this article, we present a brief review of theoretical and experimental advances in the study of vector meson’s spin alignments in a variety of high-energy particle collisions, with emphasis on hadronization mechanisms.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-11-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s11433-024-2495-1.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142679662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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}

引用次数: 0

Ultrafast dynamics in layered materials: A new angle 层状材料的超快动力学：新视角

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2024-11-15 DOI: 10.1007/s11433-024-2532-8

Hui Zhao

引用次数: 0

Local magnetic moment oscillation around an Anderson impurity on graphene 石墨烯上安德森杂质周围的局部磁矩振荡

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2024-11-13 DOI: 10.1007/s11433-024-2512-3

Shuai Li, Zhen Ma, Jin-Hua Gao

{"title":"Local magnetic moment oscillation around an Anderson impurity on graphene","authors":"Shuai Li, Zhen Ma, Jin-Hua Gao","doi":"10.1007/s11433-024-2512-3","DOIUrl":"10.1007/s11433-024-2512-3","url":null,"abstract":"<div>We theoretically investigate the spin resolved Friedel oscillation (FO) and quasiparticle interference (QPI) in graphene induced by an Anderson impurity. Once the impurity becomes magnetic, the resulted FO becomes spin dependent, which gives rise to a local magnetic moment oscillation with an envelop decaying as r−2 in real space in the doping cases. Meanwhile, at half filling, the electron density and local magnetic moment will not oscillate but decay as r−3. Such spin resolved FO has both sublattice and spin asymmetry. Interestingly, the local magnetic moment decay at half filling only occurs at one sublattice of graphene, which is quite like the phenomenon observed in the STM experiment (H. González-Herrero et al., Science 352, 437 (2016)). We further give an analytic formula about such spin dependent FO based on the stationary phase approximation. Finally, we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states (FT-LDOS). Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672424","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Tackling the microlensing wave effects of strong lensing gravitational waves with TAAH 用 TAAH 应对强透镜引力波的微透镜波效应

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2024-11-13 DOI: 10.1007/s11433-024-2530-4

Zuhui Fan

引用次数: 0

Near-perfect replication on amorphous alloys through active force modulation based on machine learning/neural network parameter prediction 通过基于机器学习/神经网络参数预测的主动力调制，在非晶合金上实现近乎完美的复制

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2024-11-13 DOI: 10.1007/s11433-024-2465-x

Senkuan Meng, Zheng Wang, Ruisong Zhu, Ruijie Liu, Jiang Ma, Lina Hu, Weihua Wang

{"title":"Near-perfect replication on amorphous alloys through active force modulation based on machine learning/neural network parameter prediction","authors":"Senkuan Meng, Zheng Wang, Ruisong Zhu, Ruijie Liu, Jiang Ma, Lina Hu, Weihua Wang","doi":"10.1007/s11433-024-2465-x","DOIUrl":"10.1007/s11433-024-2465-x","url":null,"abstract":"<div>As a microforming technique, micro/nano-structural replication possesses advantages of high precision and efficiency. With the remarkable superplasticity in the supercooled liquid region, amorphous alloys or metallic glasses (MGs) are regarded as ideal materials for miniature fabrication. However, due to the intrinsic metastable nature of supercooled liquids, the design of imprinting processes for MGs poses a challenge. In the past, process parameters have largely relied on trial-and-error strategies. In this work, a low-frequency active force modulation system is employed to apply a stable, precise, and real-time feedback stress field for imprinting of MG samples. Low-frequency vibrations can facilitate the filling of microstructures on the template surface by reducing the effective viscosity of the supercooled liquid. With the dataset composed of orthogonal experiments, a machine learning strategy based on back-propagation (BP) neural networks was utilized to construct a 3D parameter space for temperature, stress, and time, and to predict the corresponding filling ratio. Furthermore, the optimal combination of imprinting process parameters was identified, and its filling ratio was experimentally validated to reach as high as 0.94. The near-perfect replication of microstructures confirms the superiority of the active force modulation system and the data-driven strategy of machine learning-assisted parameter design. At the same time, this one-step microforming process provides a new approach to addressing the accuracy-cost trade-off dilemma in precision manufacturing.</div>","PeriodicalId":774,"journal":{"name":"Science China Physics, Mechanics & Astronomy","volume":"68 1","pages":""},"PeriodicalIF":6.4,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142672425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Observation of topological charge transformations in acoustic vortex using passive periodic systems 利用被动周期系统观测声学涡旋中的拓扑电荷转换

IF 6.4 1区物理与天体物理

Science China Physics, Mechanics & Astronomy Pub Date : 2024-11-13 DOI: 10.1007/s11433-024-2506-7

Di-Chao Chen, Xie Liu, Changqing Xu, Da-Jian Wu, Ying Cheng, Xiao-Jun Liu

引用次数: 0