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Journal of Materials Science & Technology 2024年第2期169卷 235-242页

作者： h.X.Lu h.Liu Z.Z.Fu Y.Y.Chen h.q.dai Z.hu W.L.Zhang R.q.Guo Institute for Electric Light Sources School of Information Science and TechnologyFudan UniversityShanghai 200433China Institute of Future Lighting Academy for Engineering and TechnologyFudan UniversityShanghai 200433China Yiwu Research Institute of Fudan University YiwuZhejiang 322000China Zhongshan-Fudan Joint Innovation Center Zhongshan 528437China

In this study,a two-step method was used to synthesize highly luminescent AgGaS/ZnS/ZnS quantum dots(qDs).In the first step,an inner ZnS shell was formed via a one-pot method,which resulted in a smaller lattice mismatch between the AgGaS core and the outer ZnS shell,thereby facilitating the formation of a thick outer *** the two-step shelling process,the synthesized AgGaS/ZnS/ZnS qDs showed an excellent photoluminescence quantum yield(PLqY)of 96.4%with a peak wavelength of 508 nm,repre-senting the highest PLqY reported thus far for AgGaS ***,the effect of halogen ions in Zn precursors on the shelling process was *** was proposed that the capacity of halogen ions to coordinate with the qDs influenced the balance between Zn cation diffusion and ZnS shelling ***,the ZnS shelling reaction was dominant when ZnCl_(2)was employed,while Zn cation diffusion was the dominant process under the I^(−)-rich *** work provides insights into the interfacial restructuring during the ZnS shelling and offers a clear map for the tailored synthesis of core/shell qDs.

关键词： AgGaS quantum dots Photoluminescence Core/shell Alloyed core/shell interface

From Imperfection to Perfection: Advanced 3D Facial Reconstruction Using MICA Models and Self-Supervision Learning

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Computer Modeling in Engineering & Sciences 2025年第2期142卷 1459-1479页

作者： Thinh D.Le Duong q.Nguyen Phuong D.Nguyen h.Nguyen-Xuan CIRTECh Institute HUTECH UniversityHo Chi Minh City72308Viet Nam

Research on reconstructing imperfect faces is a challenging *** this study,we explore a data-driven approach using a pre-trained MICA(MetrIC fAce)model combined with 3D printing to address this *** propose a training strategy that utilizes the pre-trained MICA model and self-supervised learning techniques to improve accuracy and reduce the time needed for 3D facial structure *** results demonstrate high accuracy,evaluated by the geometric loss function and various statistical *** showcase the effectiveness of the approach,we used 3D printing to create a model that covers facial *** findings indicate that our method produces a model that fits well and achieves comprehensive 3D facial *** technique has the potential to aid doctors in treating patients with facial injuries.

关键词： 3D face reconstruction self-supervised learning face defect 3D printed prototypes

Estimating Transient Stability Regions of Large-scale Power Systems Part Ⅱ: Reduced-order Stability Region with Computational Efficiency

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CSEE Journal of Power and Energy Systems 2025年第1期11卷 38-50页

作者： Yuqing Lin Tianhao Wen Lei Chen Yang Liu q. h. Wu School of Electric Power Engineering South China University of TechnologyGuangzhou510640China

Part Ⅱ of this paper presents a reduced-order stability region (ROSR) based method to estimate the full-order stability region (FOSR) of a large-scale power system. First, we introduce the definitions of FOSR and ROSR, followed by a comprehensive theory that reveals the relationships between them. Since the full-order system can be rewritten as a standard two timescale model and the reduced-order system is regarded as the slow subsystem of it, the proposed theory is derived based on the idea of singular perturbation. With rigorous mathematical proof, the properties of FOSR and ROSR are revealed. Moreover, a modified Energy Augmented Dynamic (EAD) algorithm and a constrained equidistant projection (CEP) approach are employed to estimate the ROSR and FOSR, respectively. The modified EAD algorithm and CEP form a so-called reduced-order stability region mapping (ROSRM) method. Finally, the proposed ROSRM method is applied to the IEEE 10-machine-39-bus power system, and simulation studies confirm its superiority to the traditional energy function method in terms of computational speed and reliability of results.

关键词： Large-scale power system singular perturbation theory stability region sum of squares transient stability

Estimating Transient Stability Regions of Large-Scale Power Systems Part I: Koopman Operator and Reduced-Order Model

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CSEE Journal of Power and Energy Systems 2025年第1期11卷 24-37页

作者： Yuqing Lin Tianhao Wen Lei Chen q. h. Wu Yang Liu School of Electric Power Engineering South China University of Technology Guangzhou China

This paper presents an estimation of transient stability regions for large-scale power systems. In Part I, a Koopman operator based model reduction (KOMR) method is proposed to derive a low-order dynamical model with reasonable accuracy for transient stability analysis of large-scale power systems. Unlike traditional reduction methods based on linearized models, the proposed method does not require linearization, but captures dominant modes of the original nonlinear dynamics by employing a Koopman operator defined in an infinite-dimensional observable space. Combined with the Galerkin projection, the obtained dominant Koopman eigenvalues and modes produce a reduced-order nonlinear model. To approximate the Koopman operator with sufficient accuracy, we introduce a Polynomial-based Multi-trajectory Kernel Dynamic Mode Decomposition (PMK-DMD) algorithm, which outperforms traditional DMD in various scenarios. In the end, the proposed method is applied to the IEEE 10-machine-39-bus power system and IEEE 16-machine-68-bus power system, which demonstrates that our method is significantly superior to the modal analysis method in both qualitative and quantitative aspects.

关键词： Power system stability Reduced order systems Nonlinear dynamical systems Eigenvalues and eigenfunctions Power system dynamics Kernel Transient analysis Analytical models Accuracy Modal analysis

[Skin mechanomedicine]

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Zhonghua yi xue za zhi 2025年第7期105卷 489-496页

作者： S M Geng J h hu q Zhao Y q Feng X Wang h Liu F Xu Department of Dermatology Second Affiliated Hospital of Xi'an Jiaotong University Xi'an 710004 China Center for Dermatology Disease Precision Medical Institute Xi'an 710115 China. Bioinspired Engineering and Biomechanics Center (BEBC) School of Life Science and Technology Xi'an Jiaotong University Xi'an 710049 China Ministry of Education Key Laboratory of Biomedical Information Engineering School of Life Science and Technology Xi'an Jiaotong University Xi'an 710049 China.

Traditional research on skin diseases has mainly focused on biological characteristics for a long time. Recently, the integration of biomechanics and mechanobiology has introduced mechanical factors into skin disease research. The interaction between mechanical factors and skin's physiological and pathological changes has gradually been transformed in clinical diagnosis and treatment. The two emerging fields, mechanodiagnostics and mechanotherapy, have been developed to address clinical needs. however, clinicians often lack a comprehensive understanding of skin mechanical characteristics and the mechanobiological mechanisms in dermatology. Thus, we propose the concept of "skin mechanomedicine". By summarizing relevant research at home and abroad, this paper systematically elucidates the multiscale mechanical characteristics of skin diseases and their impact on biological behavior from four perspectives: skin biomechanics, skin mechanobiology, skin mechanodiagnostics, and skin mechanotherapy. Meanwhile, in-depth exploration was conducted on the potential application of mechanical factors in the diagnosis and treatment of skin diseases, aiming to provide new research perspectives and solutions for the diagnosis and treatment of skin diseases.

关键词：皮肤皮肤生物力学皮肤力生物学皮肤力诊断学皮肤力治疗学

Anomalous open orbits in hofstadter spectrum of Chern insulator

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Science China(Physics,Mechanics & Astronomy) 2025年第3期Mechanics & Astronomy) .卷 143-148页

作者： haijiao Ji Peng Zhou Noah F.q.Yuan hua Jiang haiwen Liu X.C.Xie Center for Advanced quantum Studies Department of Physics Beijing Normal University Tsung-Dao Lee Institute Shanghai Jiao Tong University Department of Mathematics UC Berkeley Institute for Nanoelectronic Devices and quantum Computing Fudan University International Center for quantum Materials School of Physics Peking University hefei National Laboratory

The nontrivial band topology of Chern insulator can enrich the content of its hofstadter butterfly spectra, which is closely related to recent experiments in twisted bilayer graphene and cold atom systems. We investigate the hofstadter spectrum for various models of Chern insulators under a rational flux φ0/q, here φ0=h/e and q being an integer. We find the number of splitting subbands is |q-C| with C denoting the Chern number of parent band. Importantly, anomalous open-orbital subbands with Chern numbers q-1 and-q-1 emerge unexpectedly, which are beyond the parameter window（-q/2, q/2） of the Diophantine equation studied by Thouless-Kohmoto-Nightingale-den Nijs [Phys. Rev. Lett. 49, 405（1982）]. The emergence of anomalous open orbits can be traced by analyzing the evolution of the hofstadter spectrum, identifying as a new type of topological phase transition. These novel findings not only pinpoint the peculiar hofstadter spectrum of Chern insulator, but also provide routes to study exotic characteristics beyond the Landau level physics.

关键词： hofstadter spectrum topological phase transition open orbit

[Effects of adipose stem cell-derived exosomes on rat tendon healing and its impact on the periphery neuropeptides expression]

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Zhonghua yi xue za zhi 2025年第7期105卷 544-553页

作者： h T Xu h Zhang K Shen h Zhou h h Song D M Guo X Y Gu G L Wang q Wang G Y Yin Department of Orthopedics the First Affiliated Hospital of Nanjing Medical University Nanjing 210029 China. School of Biological Science and Medical Engineering Southeast University Nanjing 210000 China.

To investigate the effect of injectable adipose tissue stem cell-derived exosome-encapsulated hydrogel on the tendon healing in rats and to evaluate the temporal and spatial expressions of periphery neuropeptides at healing site. To generate the injectable exosome-encapsulated hydrogel, the methacryloylchloride solution (GelMA) and the photoinitiator were mixed first, then the exosome solution was added and oscillated together. Followed with exposing in the ultraviolet light in a wave length 405 nm for 30 seconds to form an injectable hydrogel. The Sprague Dawley (SD) rats were performed with full thickness transection and surgical repair administration of Achilles tendon to establish the animal model, including 4 groups: intact control (C group, selected the contralateral side of tendon transection with surgical repair group), tendon transection with surgical repair group (S group), tendon transection with surgical repair and hydrogel implantation group (h group) and tendon transection with surgical repair and exosome-encapsulated hydrogel group (E group). The samples were harvested on Day 7, 14 and 28 after the operation, respectively. histopathological examination was performed with hematoxylin-eosin staining (hE staining) and immunohistochemistry staining of tenogenesis marker (Tenomodulin, TNMD), periphery neuropeptide markers (growth associated protein-43, GAP43; S100 calcium-binding protein B, S100B; neuropeptide Y, NPY; calcitonin gene-related peptide, CGRP; Substance P, SP). Morphological property was characterized with tendon length, cross-sectional area (CSA), and gastrocnemius weight ratio. Biomechanical testing was measured with maximum failure load, stiffness and tensile modulus. The results of the quantitative polymerase chain reaction (qPCR) showed that the expression level of the TNMD gene in the E group was 2.12±0.43, which was significantly higher than that in the h group (1.26±0.28) and the S group (1.21±0.39) (both he immunoh

关键词：肌腱脂肪干细胞外泌体可注射水凝胶肌腱愈合外周神经肽

[Correlation and predictive value analysis of systemic inflammation grade and plaque stability in patients with carotid artery stenosis]

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Zhonghua yi xue za zhi 2025年第7期105卷 537-543页

作者： q h Wang C Tang J Cai Y M Wang L Zheng B Zhao L Z Fan q Ni Z S Liang T qiao Department of Vascular Surgery Nanjing Drum Tower Hospital Affiliated Hospital of Medical School Nanjing University Nanjing 210008 China. Department of Vascular Surgery Nanjing Drum Tower Hospital Clinical College of Nanjing University of Traditional Chinese Medicine Chinacal College of Nanjing University of Traditional Chinese Medicine Nanjing 210008 China. Department of Geriatrics Nanjing Drum Tower Hospital Affiliated Hospital of Medical School Nanjing University Nanjing 210008 China.

To analyze the correlation between the systemic inflammation score (SIG) and plaque stability in patients with carotid artery stenosis, and to evaluate the predictive value. The clinical data of 149 patients with carotid artery stenosis who were hospitalized in Drum Tower hospital, the Affiliated hospital of Nanjing University Medical School from January 2019 to October 2023 were retrospectively analyzed, including 124 males and 25 females, aged (68.2±8.9) years. According to the results of pathological analysis of specimens after carotid endarterectomy, the patients were divided into plaque stable group (=70) and plaque vulnerable group (=79). After preoperative blood biochemical indexes were collected and neutrophil-lymphocyte ratio and modified glasgow prognostic score(mGPS) were calculated, the SIG was calculated together. The multivariate logistic regression model was used to analyze the correlative factors of plaque stability in patients with carotid artery stenosis, and the receiver operating characteristic (ROC) curve was used to analyze the predictive value of SIG for plaque stability in patients with carotid artery stenosis. The proportion of patients with a history of diabetes in the plaque vulnerable group [36.7% (29/79) vs 20.0% (14/70)] and IL-6 [0.43 (0.31, 0.64) vs 0.34 (0.17, 0.44) ng/L] were higher than those in the plaque stabilization group(both he mGPS score and SIG score of the plaque vulnerable group were higher than those of the plaque stabilization group (both he results of the multivariate logistic regression model showed that diabetes history (=2.82, 95%: 1.23-6.48), high interleukin-6 (IL-6) level (=1.16, 95%: 1.01-1.33), and high SIG scores [with SIG=0 as the reference, (SIG=1)=1.76,95%:1.21-2.41; (SIG=2)=2.21,95%:1.51-3.01; (SIG=3)=4.47,95%:2.42-6.52; (SIG=4)=3.19,95%:2.01-4.36] were risk factors for plaque instability in patients with carotid artery stenosis. The results of ROC curve analysis showed that when the S

关键词：颈动脉狭窄动脉粥样硬化系统性炎症评分斑块稳定性

Deep view of composite SNR CTA1 with LhAASO in γ-rays up to 300 TeV

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Science China(Physics,Mechanics & Astronomy) 2025年

作者： Zhen Cao F.Aharonian Axikegu Y.X.Bai Y.W.Bao D.Bastieri X.J.Bi Y.J.Bi W.Bian A.V.Bukevich q.Cao W.Y.Cao Zhe Cao J.Chang J.F.Chang A.M.Chen E.S.Chen h.X.Chen Liang Chen Lin Chen Long Chen M.J.Chen M.L.Chen q.h.Chen S.Chen S.h.Chen S.Z.Chen T.L.Chen Y.Chen N.Cheng Y.D.Cheng M.C.Chu M.Y.Cui S.W.Cui X.h.Cui Y.D.Cui B.Z.dai h.L.dai Z.G.dai Danzengluobu X.q.Dong K.K.Duan J.h.Fan Y.Z.Fan J.Fang J.h.Fang K.Fang C.F.Feng h.Feng L.Feng S.h.Feng X.T.Feng Y.Feng Y.L.Feng S.Gabici B.Gao C.D.Gao q.Gao W.Gao W.K.Gao M.M.Ge T.T.Ge L.S.Geng G.Giacinti G.h.Gong q.B.Gou M.h.Gu F.L.Guo J.Guo X.L.Guo Y.q.Guo Y.Y.Guo Y.A.han O.A.hannuksela M.hasan h.h.he h.N.he J.Y.he Y.he Y.K.hor B.W.hou C.hou X.hou h.B.hu q.hu S.C.hu C.huang D.h.huang T.q.huang W.J.huang X.T.huang X.Y.huang Y.huang Y.Y.huang X.L.Ji h.Y.Jia K.Jia h.B.Jiang K.Jiang X.W.Jiang Z.J.Jiang M.Jin M.M.Kang I.Karpikov D.Khangulyan D.Kuleshov K.Kurinov B.B.Li C.M.Li Cheng Li Cong Li D.Li F.Li h.B.Li h.C.Li Jian Li Jie Li K.Li S.D.Li W.L.Li W.L.Li X.R.Li Xin Li Y.Z.Li Zhe Li Zhuo Li E.W.Liang Y.F.Liang S.J.Lin B.Liu C.Liu D.Liu D.B.Liu h.Liu h.D.Liu J.Liu J.L.Liu M.Y.Liu R.Y.Liu S.M.Liu W.Liu Y.Liu Y.N.Liu q.Luo Y.Luo h.K.Lv B.q.Ma L.L.Ma X.h.Ma J.R.Mao Z.Min W.Mitthumsiri h.J.Mu Y.C.Nan A.Neronov K.C.Y.Ng L.J.Ou P.Pattarakijwanich Z.Y.Pei J.C.qi M.Y.qi B.q.qiao J.J.qin A.Raza D.Ruffolo A.Sáiz M.Saeed D.Semikoz L.Shao O.Shchegolev X.D.Sheng F.W.Shu h.C.Song Yu.V.Stenkin V.Stepanov Y.Su D.X.Sun q.N.Sun X.N.Sun Z.B.Sun J.Takata P.h.T.Tam q.W.Tang R.Tang Z.B.Tang W.W.Tian L.h.Wan C.Wang C.B.Wang G.W.Wang h.G.Wang h.h.Wang J.C.Wang Kai Wang Kai Wang L.P.Wang L.Y.Wang P.h.Wang R.Wang W.Wang X.G.Wang X.Y.Wang Y.Wang Y.D.Wang Y.J.Wang Z.h.Wang Z.X.Wang Zhen Wang Zheng Wang D.M.Wei J.J.Wei Y.J.Wei T.Wen C.Y.Wu h.R.Wu q.W.Wu S.Wu X.F.Wu Y.S.Wu S.q.Xi J.Xia G.M.Xiang D.X.Xiao G.Xiao Y.L.Xin Y.Xing D.R.Xiong Z.Xiong D.L.Xu R.F.Xu R.X.Xu W.L.Xu L.Xue D.h.Yan J.Z.Yan T.Yan C.W.Yang C.Y.Yang F.Yang F.F.Yang L.L.Yang M.J.Yang R.Z.Yang W.X.Yang Y.h.Yao Z.G.Yao L.q.Yin N.Yin X.h.You Z.Y.You Y.h Southwest Jiaotong University School of Astronomy and Space Science Nanjing University Center for Astrophysics Guangzhou University Tsung-Dao Lee Institute & School of Physics and Astronomy Shanghai Jiao Tong University Institute for Nuclear Research of Russian Academy of Sciences hebei Normal University University of Science and Technology of China LhAASO Collaboration State Key Laboratory of Particle Detection and Electronics Key Laboratory of Dark Matter and Space Astronomy & Key Laboratory of Radio Astronomy Purple Mountain Observatory Chinese Academy of Sciences Research Center for Astronomical Computing Zhejiang Laboratory Key Laboratory for Research in Galaxies and Cosmology Shanghai Astronomical Observatory Chinese Academy of Sciences School of Physics and Astronomy Key Laboratory of Particle Astrophysics & Experimental Physics Division & Computing Center Yunnan University Key Laboratory of Cosmic Rays (Tibet University) Ministry of Education Department of Physics The Chinese University of hong Kong Key Laboratory of Radio Astronomy and Technology National Astronomical Observatories Chinese Academy of Sciences School of Physics and Astronomy (Zhuhai) & School of Physics (Guangzhou) & Sino-French Institute of Nuclear Engineering and Technology (Zhuhai) Sun Yat-sen University Institute of high Energy Physics Institute of Frontier and Interdisciplinary Science Shandong University APC Université Paris Cité CNRS/IN2P3 CEA/IRFU Observatoire de Paris Department of Engineering Physics & Department of Astronomy Tsinghua University School of Physics and Microelectronics Chinese Academy of Sciences Zhengzhou University Yunnan Observatories Chinese Academy of Sciences China Center of Advanced Science and Technology College of Physics Sichuan University School of Physics Peking University Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and Technology University of Chinese Academy of Sciences Guangxi University Department of Physics Faculty of Science Mahidol University Moscow Institute

The ultra-high-energy（UhE） gamma-ray source 1LhAASO J0007+7303u is positionally associated with the composite SNR CTA1 that is located at high Galactic Latitude b ≈ 10.5°. This provides a rare opportunity to spatially resolve the component of the pulsar wind nebula（PWN） and supernova remnant（SNR） at UhE. This paper conducted a dedicated data analysis of 1LhAASO J0007+7303u using the data collected from December 2019 to July 2023. This source is well detected with significances of 21σ and 17σ at 8-100 TeV and >100 TeV, respectively. The corresponding extensions are determined to be 0.23°±0.03°and 0.17°±0.03°. The emission is proposed to originate from the relativistic electrons accelerated within the PWN of PSR J0007+7303. The energy spectrum is well described by a power-law with an exponential cutoff function dN/dE =（42.4 ± 4.1）(E/（20 TeV）)-2.31±0.11exp(-E/（110±25 TeV）) TeV-1cm-2s-1in the energy range from 8 to 300 TeV, implying a steady-state parent electron spectrum dNe/dEe∝(Ee/（100 TeV）)-3.13±0.16exp[(-Ee/（373±70 TeV）)2] at energies above ≈ 50 TeV. The cutoff energy of the electron spectrum is roughly equal to the expected current maximum energy of particles accelerated at the PWN terminal shock. Combining the X-ray and gamma-ray emission, the current space-averaged magnetic field can be limited to≈ 4.5 μG. To satisfy the multi-wavelength spectrum and the γ-ray extensions, the transport of relativistic particles within the PWN is likely dominated by the advection process under the free-expansion phase assumption.

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LhAASO detection of very-high-energy γ-ray emission surrounding PSR J0248+6021

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We report the detection of an extended very-high-energy(VhE) γ-ray source coincident with the location of middle-aged(62.4 kyr) pulsar PSR J0248+6021, by using the LhAASO-WCDA data of live 796 d and LhAASO-KM2A data of live 1216d. A significant excess of γ-ray induced showers is observed both by WCDA in energy bands of 1-25 Te V and KM2A in energy bands of >25 TeV with 7.3σ and 13.5σ, respectively. The best-fit position derived through WCDA data is R.A. = 42.06°± 0.12°and Dec. = 60.24°± 0.13°with an extension of 0.69°±0.15°and that of the KM2A data is R.A.= 42.29°± 0.13°and Dec. =60.38°± 0.07°with an extension of 0.37°±0.07°. No clear extended multiwavelength counterpart of this LhAASO source has been found from the radio band to the GeV band. The most plausible explanation of the VhE γ-ray emission is the inverse Compton process of highly relativistic electrons and positrons injected by the pulsar. These electrons/positrons are hypothesized to be either confined within the pulsar wind nebula or to have already escaped into the interstellar medium, forming a pulsar halo.

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