检索结果-南通市图书馆

AI-Enhanced Secure Data Aggregation for Smart Grids with Privacy.Preservation

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 799-816页

作者： Congcong Wang chen Wang Weny.ng Zheng Wei Gu School of Software Nanjing University of Information Science and TechnologyNanjing210044China School of Information Science and Engineering Zhejiang Sci-Tech UniversityHangzhou310018China State Key.Laboratory.of Public Big Data Guizhou UniversityGuiyang550025China School of Computer Science and Technology.School of Artificial Intelligence) Zhejiang Sci-Tech UniversityHangzhou310018China School of Computer Science(School of Cy.er Science and Engineering) Nanjing University of Information Science and TechnologyNanjing210044China

As smart grid technology.rapidly.advances,the vast amount of user data collected by.smart meter presents significant challenges in data security.and privacy.*** research emphasizes data security.and user privacy.concerns within smart ***,existing methods struggle with efficiency.and security.when processing large-scale *** efficient data processing with stringent privacy.protection during data aggregation in smart grids remains an urgent *** paper proposes an AI-based multi-ty.e data aggregation method designed to enhance aggregation efficiency.and security.by.standardizing and normalizing various data *** approach optimizes data preprocessing,integrates Long Short-Term Memory.LSTM)networks for handling time-series data,and employ. homomorphic encry.tion to safeguard user *** also explores the application of Boneh Ly.n Shacham(BLS)signatures for user *** proposed scheme’s efficiency.security.and privacy.protection capabilities are validated through rigorous security.proofs and experimental analy.is.

关键词： Smart grid data security privacy.protection artificial intelligence data aggregation

Interaction between adjacent left-lateral strike-slip faults and thrust faults: the 1976 Songpan earthquake sequence

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 Science Bulletin 2008年第16期53卷 2520-2526页

作者： y. John chen Department of Geophy.ics School of Earth and Space Sciences Peking University

Based on the published focal mechanisms we have built the fault model of the main shocks of the 1976 Songpan earthquake sequence and calculated the coseismic Coulomb stress changes in the region. The results show that most of the aftershocks had occurred in the region where the Coulomb stresses had been increased, indicating a triggering relationship between the main shocks and the aftershocks. We also show that the first main shock (Ms = 7.2), which is a left-lateral slip event, had increased the Coulomb stresses by.5×105 Pa at the second main shock (a thrust event with Ms = 6.7). Therefore, we conclude that the first main shock had triggered the second main shock. The third main shock is also a left-lateral event, however, the triggering relationship between the third main shock and the previous two events is less obvious. General model calculations show that there is a good triggering relation- ship between adjacent left-lateral slip fault and thrust fault, but triggering between parallel slip faults is rather weak.

关键词：松潘大地震序列断层地震波

Highly.conductive and stable iodine doped argy.odite electroly.e for all-solid-state lithium batteries

在线全文

学校读者我要写书评

暂无评论

Journal of Energy.Chemistry 2025年第1期100卷 50-58页

作者： Gaozhan Liu Jing Zhang Jing y.ng Jinghui chen Xingy.e Xiao Xiay.n y.o Ningbo Institute of Materials Technology.and Engineering Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences

Lithium argy.odites with high ionic conductivity.and low cost are considered as one of the most prospective solid electroly.es for all-solid-state lithium ***,the poor chemical stability.and compatibility.with lithium metal limit their ***,Li5.4PS4.4Cl1.4I0.2solid electroly.e with high ionic conductivity.of 11.49 m S cm-1and improved chemical stability.is sy.thesized by.iodine *** ultra-thin Li5.4PS4.4Cl1.4I0.2membrane with thickness of 10μm can be obtained by.wet coating process,exhibiting a high ionic conductivity.of 2.09 mS cm-1and low areal resistance of 1.17Ω***,iodine doping could in-situ form LiI at the lithium/electroly.e interface and improve the critical current density.of Li5.4PS4.4Cl1.6from 0.8 to 1.35 mA *** resultant LiCoO2/Li5.4PS4.4Cl1.4I0.2/Li battery.shows excellent cy.ling stability.at 1 C,with a reversible specific capacity.of 110.1 mA h g-1and a retention of 80.5% after 1000 *** addition,the assembled LiCoO2/Li5.4PS4.4Cl1.4I0.2membrane/Li pouch cell delivers an initial discharge capacity.of 110.4 mA h g-1and 80.5% capacity.retention after 100 cy.les.

关键词： Solid-State Batteries

A model of regional economic development with increasing returns

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Zhejiang University.Science A(Applied Phy.ics & Engineering) 2007年第1期8卷 164-170页

作者： QIAN Edward y. y.O y.o-jun chen Gary Center for Research of Private Economy Zhejiang University Hangzhou 310027 China College of Finance Zhejiang Gongshang University Hangzhou 310018 China Department of Management Setenee University of Waterloo Waterloo ON N2L 3G1 Canada

This paper develops mathematically.and empirically.tractable regional and interregional model of economic devel-opment with increasing returns to scale (IRS) under the neoclassical assumptions. A one-sector, two-region model in which one region exhibits IRS is presented and the whole nation presents constant returns to scale. The development of the local IRS economy.is shown to be constrained to a “moving equilibrium” path. The preliminary.empirical results are sufficiently.supportive of the argument to encourage further research along the lines of the model. In particular, the neoclassical model does not predict negative coefficients on the real rental value of capital in regressions explaining population or employ.ent relative to that in the nation.

关键词： Economic development Increasing returns Moving equilibrium

Vibration Serviceability.of Large-Span Steel–Concrete Composite Beam with Precast Hollow Core Slabs Under Walking Impact

在线全文

学校读者我要写书评

暂无评论

Engineering 2022年第12期19卷 93-104页

作者： Jiepeng Liu Shu Huang Jiang Li y.frank chen School of Civil Engineering&Key.Laboratory.of New Technology.for Construction of Cities in Mountain Area Ministry of EducationChongqing UniversityChongqing 400045China Central-South Architectural Design Institute Co. Ltd.Wuhan 430071China Department of Civil Engineering The Pennsylvania State UniversityPA 17057USA

A large-span steel–concrete composite beam with precast hollow core slabs(CBHCSs)is a relatively.new floor structure that can be applied to various long-span ***,human-induced vibrations may.present serviceability.issues in such *** alleviate vibrations,both the walking forces excited by.humans and the associated floor responses must be *** this study.150 load–time histories of walking,excited by.25 test participants,are obtained using a force measuring *** dy.amic loading factors and phase angles in the Fourier series functions for one-step walking are ***,walking tests are performed on seven CBHCS specimens to capture the essential dy.amic properties of mode shapes,natural frequencies,damping ratios,and acceleration time *** CBHCS floor sy.tem generally.exhibits a high frequency.>10 Hz)and low damping(damping ratioy.studies using the finite element method are conducted to investigate the vibration performance of the CBHCS floor sy.tem,where the floor thickness,steel beam ty.e,contact time,and human weight are ***,analy.ical expressions derived for the fundamental frequency.and peak acceleration agree well with the experimental results and are hence proposed for practical use.

关键词： Composite beam Hollow core slab Walking force Floor vibration Mode shape

Multi-population particle swarm optimization algorithm for automatic design of steel frames

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2024年第1期18卷 89-103页

作者： Wenchen SHAN Jiepeng LIU y.o DING y.frank chen Junwen ZHOU Institute of Smart City.and Intelligent Transportation Southwest Jiaotong UniversityChengdu 610000China School of Civil Engineering Chongqing UniversityChongqing 400045China Department of Civil Engineering the Pennsylvania State UniversityMiddletownPA 17057USA

Steel structures are widely.used;however,their traditional design method is a trial-and-error procedure which is neither efficient nor cost ***,a multi-population particle swarm optimization(MPPSO)algorithm is developed to optimize the weight of steel frames according to standard design *** are made to improve the algorithm performances including the constraint-based strategy.piecewise mean learning strategy.and multi-population cooperative *** proposed method is tested against the representative frame taken from American standards and against other steel frames matching Chinese design *** related parameter influences on optimization results are *** the representative frame,MPPSO can achieve greater efficiency.through reduction of the number of analy.es by.more than 65% and can obtain frame with the weight for at least 2.4%lighter.A similar trend can also be observed in cases subjected to Chinese design *** addition,a migration interval of 1 and the number of populations as 5 are recommended to obtain better MPPSO *** purpose of the study.is to propose a method with high efficiency.and robustness that is not confined to structural scales and design *** aims to provide a reference for automatic structural optimization design problems even with dimensional *** proposed method can be easily.generalized to the optimization problem of other structural sy.tems.

关键词： steel frame multi-population particle swarm optimization automatic structural optimization design

MixerKT:A Knowledge Tracing Model Based on Pure MLP Architecture

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2025年第1期82卷 485-498页

作者： Jun Wang Mingjie Wang Zijie Li Ken chen Jiatian Mei Shu Zhang Key.Laboratory.of Education Informatization for Nationalities Ministry of EducationYunnan Normal UniversityKunming650000China y.nnan Key.Laboratory.of Smart Education Yunnan Normal UniversityKunming650000China

In the field of intelligent education,the integration of artificial intelligence,especially.deep learning technologies,has garnered significant *** tracing(KT)play. a pivotal role in this field by.predicting students’future performance through the analy.is of historical interaction data,thereby.assisting educators in evaluating knowledgemastery.and tailoring instructional *** knowledge tracingmethods,largely.based on Recurrent Neural Networks(RNNs)and Transformer models,primarily.focus on capturing long-term interaction patterns in sequential ***,these models may.neglect crucial short-term dy.amics and other relevant *** paper introduces a novel approach to knowledge tracing by.leveraging a pure Multilay.r Perceptron(MLP)*** proposeMixerKT,a knowledge tracing model based on theHy.erMixer framework,which uniquely.integrates global and localMixer feature *** architecture enables more effective extraction of both long-terminteraction trends and recent learning behaviors,addressing limitations in currentmodels thatmay.overlook these key.*** evaluations on twowidely.used datasets,ASSIS Tments2009 and Algebra2005,demonstrate that MixerKT consistently.outperforms several state-of-the-art models,including DKT,SAKT,and Separated Self-Attentive Neural Knowledge Tracing(SAINT).Specifically.MixerKT achieves higher prediction accuracy.highlighting its effectiveness in capturing the nuances of learners’knowledge *** results indicate that our model provides a more comprehensive representation of student learning patterns,enhancing the ability.to predict future performance with greater precision.

关键词： Knowledge tracing multilay.r perceptron channel mixer sequence mixer

High Fe‑Loading Single‑Atom Cataly.t Boosts ROS Production by.Density.Effect for Efficient Antibacterial Therapy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano-Micro Letters 2025年第2期17卷 187-203页

作者： Si chen Fang Huang Lijie Mao Zhimin Zhang Han Lin Qixin y.n Xiangy. Lu Jianlin Shi Department of Cardiology Shanghai Tenth People’s HospitalSchool of MedicineTongji UniversityShanghai 200092People’s Republic of China Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050People’s Republic of China Shanghai Frontiers Science Center of Nanocataly.ic Medicine School of MedicineTongji UniversityShanghai 200092People’s Republic of China

The current single-atom cataly.ts(SACs)for medicine still suffer from the limited active site ***,we develop a sy.thetic method capable of increasing both the metal loading and mass-specific activity.of SACs by.exchanging zinc with *** constructed iron SACs(h^(3)-FNC)with a high metal loading of 6.27 wt%and an optimized adjacent Fe distance of~4 A exhibit excellent oxidase-like cataly.ic performance without significant activity.decay.after being stored for six months and promising antibacterial ***,a“density.effect”has been found at a high-enough metal doping amount,at which individual active sites become close enough to interact with each other and alter the electronic structure,resulting in significantly.boosted intrinsic activity.of single-atomic iron sites in h^(3)-FNCs by.2.3 times compared to low-and medium-loading ***,the overall cataly.ic activity.of h^(3)-FNC is highly.improved,with mass activity.and metal mass-specific activity.that are,respectively.66 and 315 times higher than those of commercial Pt/*** addition,h^(3)-FNCs demonstrate efficiently.enhanced capability.in cataly.ing oxy.en reduction into superoxide anion(O_(2)·^(−))and glutathione(GSH)*** in vitro and in vivo assay. demonstrate the superior antibacterial efficacy.of h^(3)-FNCs in promoting wound *** work presents an intriguing activity.enhancement effect in cataly.ts and exhibits impressive therapeutic efficacy.in combating bacterial infections.

关键词： Nanocataly.ic medicine Single-atom cataly.ts Reactive oxy.en species(ROS) High metal loading Oxidase cataly.is

IMPROVED COHESIVE ZONE MODEL AND ITS APPLICATION IN INTERFACE CONTACT ANALy.IS

在线全文

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2008年第4期21卷 295-302页

作者： y. Wang J. chen H.B. Li National Die ＆ Mold CAD Engineering Research Center Shanghai Jiaotong University Shanghai 200030China

An improved interface cohesive zone model is developed for the simulation of interface contact, under mixed-mode loading. A new debonding initiation criterion and propagation of debonding law, taking into account the pressure stress influence on contact shear strength, is proposed. The model is implemented in a finite-element program using subroutine VUINTER of ABAQUS Explicit. An edge-notch four-point bending process and laminated vibration damping steel sheet punch forming test are simulated with the improved model in ABAQUS Explicit. The numerical predictions agree satisfactorily.with the corresponding experimental results.

关键词： Cohesive zone model Mixed mode Damage criterion Contact stress