检索结果-南通市图书馆

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

在线全文

学校读者我要写书评

暂无评论

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

Outcomes of a non-diffractive extended depth of focus intraocular lens in patients with well-controlled glaucoma and ocular hypertension

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2025年第1期18卷 79-85页

作者： Jia-ru Liu Andrei-Alexandru Szigiato Paul harasymowycz Department of Ophthalmology University of MontrealQuebec H3T 1J4Canada Department of Ophthalmology Hôpital Sacré-CoeurQuebec H4J 1C5Canada Department of Ophthalmology Hôpital Maisonneuve-RosemontQuebec H1T 2M4Canada Bellevue Ophthalmology Clinics Quebec H1V 1G5Canada

AIM:To assess visual outcomes and satisfaction of a non-diffractive extended depth of focus(EDOF)intraocular lens(IOL)in individuals with ocular hypertension(OhT)and well-controlled mild glaucoma undergoing cataract ***:An investigator-initiated,single-center,prospective,interventional,noncomparative study conducted in Montreal,*** study enrolled 31 patients(55 eyes)with OhT or mild glaucoma who received a non-diffractive EDOF IOL(Acrysof Iq Vivity).Participants underwent sequential cataract surgery with the Vivity ***-up evaluations occurred at 1d,1,and 3mo postoperatively,assessing uncorrected distance,intermediate,and near visual ***(qUVID:questionnaire for visual disturbances and IOLSAT:Intraocular lens satisfaction)were administered pre and post-operatively to measure visual disturbances and spectacle independence in various *** parameters included intraocular pressure(IOP),glaucoma medications,spherical equivalence,mean deviation and pattern standard deviation or square root of lost variance on Octopus visual ***:At 1 and 3mo postoperatively,significant improvements were observed in uncorrected distance and intermediate visual *** independence was enhanced for distance and intermediate vision,especially in bright light ***-free intermediate vision was improved even in dim *** disturbances,particularly glare symptoms,were reduced,and there was a notable decrease in IOP and glaucoma medication burden at *** was more hazy vision postoperatively with no impact on visual acuity and visual ***:The non-diffractive EDOF lens improves distance and intermediate spectacle-free visual function in patients with OhT and well-controlled *** findings highlight significant improvements in visual acuity,reduced glare,enhanced spectacle independence,and improved visual performance in different lighting conditions.

关键词： extended depth of focus refractive glaucoma ocular hypertension cataract intraocular lens

Fluorine-functionalized zirconium-organic cages for efficient photocatalytic oxidation of thioanisole

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2025年第1期36卷 632-636页

作者： Jia-ru Li Ning Li Li-Ling he Jun he School of Chemical Engineering and Light Industry Guangdong University of TechnologyGuangzhou 510006China School of Chemistry South China Normal UniversityGuangzhou 510006China

Zirconium-based metal-organic cages(Zr-MOCs)typically exhibit high stability,but their structural and application reports are scarce due to stringent crystallization *** have successfully fluorinated the classical Zr-MOCs(ZrT-3)for the first time,obtaining the fluorinated MOCs(ZrT-3-F).Notably,ZrT-3-F not only inherits the high stability of its parent structure,but also acts as a catalyst for the effective oxidation of benzyl thioether for the first *** reaction can reach a conversion rate of 99%in 6 h,and the selectivity reaches 95%,which far exceeds the non-fluorinated *** work proves that the specific functionalization of the classical Zr-MOCs can further expand their application potential,such as catalysis.

关键词： Ultraviolet light Fluorine Zirconium-based metal-organic cages Sulfide oxidation Multiphase photocatalysis

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

在线全文

学校读者我要写书评

暂无评论

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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.q.alitative 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

Promotion of chronic wound healing by plant-derived active ingredients and research progress and potential of plant polysaccharide hydrogels

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese herbal Medicines 2025年第1期17卷 70-83页

作者： ru Yan Yanhong Wang Weinan Li Jialin Sun School of Pharmacy Heilongjiang University of Chinese Medicine Key Laboratory of Basic and Application Research of Beiyao Ministry of Education Heilongjiang University of Chinese Medicine Department of Medicine Heilongjiang Minzu College Postdoctoral Research Station Heilongjiang University of Chinese Medicine

Wound healing is a complex biochemical *** use of herbal medicine in wound healing not only carries forward the wisdom of traditional medicine,with its anti-inflammatory and immune-regulating effects,but also reflects the direction of modern biopharmaceutical technology,such as its potential in developing new biomaterials like *** article first outlines the inherent structural properties of healthy skin,along with the physiological characteristics related to chronic wounds in patients with diabetes and ***,the article delves into the latest advancements in clinical and experimental research on the impact of active constituents in herbal medicine on wound tissue regeneration,summarizing existing studies on the mechanisms of various herbal medicines in the healing of diabetic and burn ***,the paper thoroughly examines the application and mechanisms of plant polysaccharide hydrogels containing active herbal compounds in chronic wound *** primary objective is to provide valuable resources for the clinical application and development of herbal medicine,thereby maximizing its therapeutic *** also represents the continuation of traditional medical wisdom,offering new possibilities for advancements in regenerative medicine and wound care.

关键词： active ingredient herbal medicine hydrogel polysaccharides in traditional herbal medicine wound healing

[Skin mechanomedicine]

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

同方期刊数据库

Axisymmetric wetting of a liquid droplet on a stretched elastic membrane

在线全文

学校读者我要写书评

暂无评论

Applied Mathematics and Mechanics(English Edition) 2023年第6期44卷 997-1006页

作者： C.q.ru Department of Mechanical Engineering University of AlbertaEdmontonAB T6G 2G8Canada

Wetting of a liquid droplet on another liquid substrate is governed by the well-known Neumann *** present work aims to develop an explicit modified version of the Neumann equations for axisymmetric wetting of a liquid droplet on a highly stretched elastic membrane of non-zero bending *** explicit modified form of the Neumann equations is derived to determine the two contact angles,which is reduced to Young's equation for a liquid droplet on a rigid membrane or to the Neumann equations for a liquid droplet on another liquid *** implications of the modified Neumann equations are examined by comparison with some previous results reported in the recent literature,particularly considering the ranges of material and geometrical parameters of the liquid droplet-membrane system which have not been recently addressed in the literature.

关键词： Neumann equation Young's equation liquid droplet membrane pretension