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Constant-roll inflation with non-minimally derivative coupling

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Communications.in Theoretical Physics 2024年第9期76卷 55-62页

作者： Jie Liu Yungui Gong Zhu yi school of Physics and Electronic Engineering Hainan Normal UniversityHaikou 571158China Department of Physics School of Physical Science and TechnologyNingbo UniversityNingboZhejiang 315211China school of Physics Huazhong University of Science and TechnologyWuhanHubei 430074China Faculty of Arts and s.iences Beijing Normal UniversityZhuhai 519087China Advanced ins.itute of Natural s.iences Beijing Normal UniversityZhuhai 519087China

We inves.igate the constant-roll inflation with non-minimally kinetic coupling to the Einstein *** the slow-roll parameterηφ=-φ/(Hφ)being a constant,we calculate the power spectra for scalar and tensor perturbations,and derive the expres.ions for the scalar spectral tilt n_(s),the tensor spectral tilt n_(T),and the tensor-to-scalar ratio *** find that the expres.ions for n_(s)are different with different ordering of taking the derivative of the scalar power spectrum with respect to the scale k and the horizon cros.ing condition c_(sk)=a H in the constant-roll inflation,the consistency relation r=-8n_(T)does not hold if|η_(φ)|is not small,and the duality of the tensorto-scalar ratio between the slow-roll inflation and ultra-slow-roll inflation does not exist in inflationary models with non-minimally derivative *** result offers a fresh perspective on the understanding of the inflationary models with non-minimally derivative coupling and is helpful for the production of scalar induced gravitational waves.in the framework of ultra-slowroll inflation with non-minimally derivative coupling.

关键词： inflation constant-roll inflation non-minimally derivative coupling inflation

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Vibronic coupling effect on intersystem cros.ing rates of TADF emitters

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Chinese Journal of structural Chemistry 2024年第6期43卷 22-24页

作者： Xin Huang yi Zhao Wanzhen Liang state Key Laboratory of Physical Chemistry of solid surfaces iChEMFujian Provincial Key Lab of Theoretical and Computational ChemistryCollege of Chemistry and Chemical EngineeringXiamen UniversityXiamen361005China

To take advantage of all the singlet and triplet excitons and then achieve 100%internal quantum efficiency in OLED devices,the s.ientists have proposed the thermally activated delayed fluorescence(TADF)strategy which tries to achieve"delayed"fluorescence by converting triplet excitons to singlet excitons through a reverse intersystem cros.ing(isC/RisC)process with the help of thermal activation[1].in the early days,the efficient RisC processes were facilitated by a negligible energy gap(△E_(sT))and a large s.in-orbit coupling(sOC)matrix element(sOCME)between the first singlet(s_(1))and triplet(T_(1))excited states.

关键词： coupling system emitter

Assay of Biomarkers for Alzheimer's Disease by surface Plasmon Resonance

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Journal of Analysis and Tes.ing 2024年第3期8卷 251-261页

作者： Xinyao yi Huihui Chen Yuhan He Jianxiu Wang Hunan Provincial Key Laboratory of Micro and Nano Materials.interface s.ience College of Chemistry and Chemical EngineeringCentral South University

Alzheimer's disease(AD) is one of the neurodegenerative diseases characterized by cognitive dysfunction and behavioral impairment. Early diagnosis of AD serves as a viable means to avoid the onset and progres.ion of the disease. Due to the remarkably lower expres.ion levels of AD biomarkers.in cerebros.inal fluids and serum samples, sensitive and specific analytical methods are highly demanded. surface plasmon resonance(sPR) is ultrasensitive to the refractive index or thickness change at the metal surface, which enables real-time and label-free assay of target biomolecules. in this review, we summarize the advances on assay of AD biomarkers.including amyloid beta, tau protein, apoE proteins and apoE genes, and BACE1 by sPR, with emphasis on the analytical performances concerning anti-fouling and signal amplification strategies and real sample applications.

关键词： Alzheimer’s disease amyloid beta apoE BACE1 surface plasmon resonance Tau protein

Liquid-metal microgrid stretchable electronics based on bionic leaf veins with ultra-stretchability and high conductivity

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Rare Metals 2024年第6期43卷 2747-2757页

作者： Xi-Di sun Jun-Yang An yi-Qi sun Xin Guo Jing Wu Jiang-Bo Hua Meng-Rui su yi s.i Li-Jia Pan Collaborative innovation Center of Advanced Microstructures School of Electronic Science and EngineeringNanjing UniversityNanjing 210093China

stretchable electronics that monitor joint activity and treat diseases based on liquid metal could be used in the development of healthcare *** devices can be seamlessly integrated with human ***,most high-precision microstructures and complex patterns are difficult to fabricate due to the limitations of conventional fabrication solutions,resulting in suboptimal performance under practical ***,a liquid-metal stretchable system utilizing natural leaf veins was reported as microstructures,which was based on a biomimetic concept and utilized an all-solution process for the preparation of complex *** systems are ultra-high tensile(800%tensile strain),environmentally stable(20 days)and mechanically durable(300-cycle).The system can accurately recognize the wearer's finger bending level as well as simple gesture *** the same time,the system acts as a wearable heater,which can realize the fast heating behavior of heating up to 50℃in 3 min under the human body-safe voltage(1.5 V).The tensile stability is demonstrated by the heterogeneous.integration of lasers(405 nm)with the system interconnects for a stretchable and wearable light source.

关键词： stretchable electronics Liquid metal stretchable conductor Vein Bionicist electronics

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Rts: learning robustly from time series data with noisy label

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Frontiers of Computer s.ience 2024年第6期18卷 186332-186332页

作者： ZHOU Zhi JiN yi-Xuan Li Yu-Feng National Key Laboratory for Novel software Technology Nanjing University

significant progress has been made in machine learning with large amounts of clean labels and static data. However, in many real-world applications, the data often changes with time and it is difficult to obtain mas.ive clean annotations, that is, noisy labels and time series are faced simultaneously. For example, in product-buyer evaluation, each sample records the daily time behavior of users, but the long transaction period brings difficulties to analysis, and salespeople often erroneously annotate the user’s purchase behavior. such a novel setting, to our best knowledge, has not been thoroughly studied yet, and there is s.ill a lack of effective machine learning methods. in this paper, we present a systematic approach RTs both theoretically and empirically, consis.ing of two components, Noise-Tolerant Time series Representation and Purified Oversampling Learning. specifically, we propose reducing label noise’s destructive impact to obtain robust feature representations and potential clean samples. Then, a novel learning method based on the purified data and time series oversampling is adopted to train an unbiased model. Theoretical analysis proves that our proposal can improve the quality of the noisy data set. Empirical experiments on diverse tasks, such as the house-buyer evaluation task from real-world applications and various benchmark tasks, clearly demonstrate that our new algorithm robustly outperforms many competitive methods.

关键词： weakly-supervised learning time-series clas.ification class.imbalanced learning

A Novel 3D Gait Model for subject identification Robust against Carrying and Dres.ing Variations

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Computers, Materials & Continua 2024年第7期80卷 235-261页

作者： Jian Luo Bo Xu Tardi Tjahjadi Jian yi College of information s.ience and Engineering Hunan Normal UniversityChangsha410000China school of Engineering University of WarwickCoventryCV47ALUK

subject identification via the subject’s gait is challenging due to variations.in the subject’s carrying and dres.ing conditions.in real-life *** paper proposes a novel targeted 3-dimensional(3D)gait model(3DGait)represented by a set of interpretable 3DGait descriptors based on a 3D parametric body *** 3DGait descriptors are utilised as.invariant gait features.in the 3DGait recognition method to address object carrying and *** 3DGait recognitionmethod involves 2-dimensional(2D)to 3DGaitdata learningbasedon3Dvirtual samples,a semantic gait parameter es.imation Long short Time Memory(LsTM)network(3D-sGPE-LsTM),a feature fusion deep model based on a multi-set canonical correlation analysis,and softMax recognition ***,a sensory experiment based on 3D body shape and pose deformation with 3D virtual dres.ing is used to fit 3DGait onto the given 2D gait images.3Dinterpretable semantic parameters control the 3D morphing and dres.ing *** degree measurement determines the semantic descriptors of 2D gait images of subjects with various shapes,poses and ***,using the 2D gait images as.input and the subjects’corresponding 3D semantic descriptors as output,an end-to-end 3D-sGPE-LsTM is constructed and ***,body shape,pose and external gait factors(3D-eFactors)are es.imated using the 3D-sGPE-LsTM model to create a set of interpretable gait descriptors to represent the 3DGait Model,i.e.,3D intrinsic semantic shape descriptor(3Dshape);3D skeleton-based gait pose descriptor(3D-Pose)and 3D dres.ing with other ***,the 3D-shape and 3D-Pose descriptors are coupled to a unified pattern space by learning prior knowledge from the *** research on CAsiA B,CMU MoBo,TUM GAiD and GPJATK databases shows that 3DGait is robust against object carrying and dres.ing variations,especially under multi-cross variations.

关键词： Gait recognition human identification three-dimensional gait canonical correlation analysis

Energy consumption optimization for edge computing-supported cellular networks based on optimal transport theory

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s.ience China(information s.iences) 2024年第2期67卷 201-218页

作者： Xiangyu LV Xiaohu GE yi ZHONG Qiang Li Yong XiAO school of Electronic information and Communications Huazhong University of Science and Technology

With advancements.in mobile communication technologies, there have been multiple user device(UD) connections to cellular networks. Because of changes.in the spatial distribution of UDs and application requirements, the traditional offloading mechanism based on the nearest distance will result in heavy loads for some base stations(Bss). Because there is a high-order relations.ip between the energy consumption of the Bs proces.ing tasks and the number of computing tasks, the traditional offloading mechanism will result in high energy consumption, and UD’s offloading decision must be dynamically adjusted. The offloading decision of UDs.is optimized based on detailed information about various parameters associated with a network from the standpoint of distribution. This.information includes details regarding the spatial distribution of UDs,application requirements, and the offloading period of computing tasks. Based on optimal transport theory,an energy consumption optimization algorithm is suggested to lower the total amount of energy consumed by the offloading process of UDs’ computing tasks by reasonably planning the offloading Bss of the UDs.in the networks. The simulation results show that the proposed offloading mechanism based on energy consumption optimization reduces the total energy consumption of the offloading process by 28.09% when compared to the traditional offloading mechanism, and the traffic managed by each Bs.is balanced.

关键词： optimal transport theory edge computing energy consumption reduction dynamic voltage frequency scaling

Unlocking high-efficiency oxygen evolution reaction through Co-N coordination engineering in Co@N-doped porous carbon core–shell nanoparticles

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Nano Research 2024年第8期17卷 7068-7076页

作者： shucheng Liu Yu shuai Xiaosi Qi Zhao Ding yi Liu College of Big Data and information Engineering Guizhou UniversityGuiyang 550025China College of Physics Guizhou Province Key Laboratory for Photoelectrics Technology and ApplicationGuizhou UniversityGuiyang 550025China

Modulation of metal sites coordination can significantly refine the electronic architecture of catalysts,thereby improving their catalytic *** work successfully developed a core–shell Co@N-doped porous carbon(Co@NC)catalyst by pyrolyzing the COF/MOF(iisERP-COF3/ZiF-67)composite in an inert *** Co@NC catalyst exhibited impres.ive oxygen evolution reaction(OER)performance,with a small overpotential of 304 mV and a modest Tafel slope of 88.6 mV·dec^(−1) in a 1 M KOH,alongside remarkable stability,maintaining 98.5%of its activity over 13 *** role of iisERP-COF3 was pivotal in preventing Co atom aggregation during the ZiF-67 pyrolysis,which facilitated the creation of mesopores for enhanced mass transport and ***,it effectively modulated the Co-N coordination to fine-tune the electronic structure,thereby optimizing the catalyst's capacity for adsorption of intermediates and boos.ing its.intrinsic *** functional theory(DFT)studies corroborate that the exceptional OER efficiency of Co@NC can be linked to the enhanced Co-N coordination,optimizing the localized electronic structure at the Co active *** study not only proposes an innovative approach for optimizing COF/MOF as effective electrocatalysts but also clears the path for the emergence of affordable,high-performance alternatives to precious metal-based catalysts,marking a significant advancement in sustainable energy technologies.

关键词： covalent organic framework(COF) metal-organic framework(MOF) core-shell structure catalysts oxygen evolution reaction

Three-dimensional numerical manifold method for heat conduction problems with a simplex integral on the boundary

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s.ience China(Technological s.iences) 2024年第4期67卷 1007-1022页

作者： TONG DeFu yi XiongWei TAN Fei JiAO YuYong LiANG JiaWei Faculty of Engineering China University of GeoscienceWuhan 430074China Department of Civil Engineering Monash UniversityMelbourne VIC 3800Australia Badong National Observation and Research station of Geohazards China University of GeoscienceWuhan 430074China

The three-dimensional numerical manifold method(3D-NMM),which is based on the derivation of Galerkin's variation,is a powerful calculation tool that uses two cover *** 3D-NMM can be used to handle continue-discontinue problems and extend to THM *** this study,we extended the 3D-NMM to simulate both steady-state and transient heat conduction *** modelling was carried out using the raster methods(RsM).For the system equation,a variational method was employed to drive the discrete equations,and the crucial boundary conditions were solved using the penalty *** solve the boundary integral problem,the face integral of scalar fields and two-dimensional simplex integration were used to accurately describe the integral on polygonal *** numerical examples were used to verify the results of 3D steady-state and transient heat-conduction *** numerical results.indicated that the 3D-NMM is effective for handling 3D both steadystate and transient heat conduction problems with high solution accuracy.

关键词： three-dimensional numerical manifold method transient analysis heat conduction problem Galerkin variation simplex integration

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