检索结果-南通市图书馆

Synchronization of chaotic Lur'e systems with delayed feedback control using deadzone nonlinearity

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2011年第1期20卷 209-214页

作者： S.m.Lee o.m.kwon Ju H.Park Department of Electronic Engineering Daegu UniversityGyungsan 712-714Republic of Korea School of Electrical Engineering Chungbuk National University410 SungBong-RoHeungduk-guCheongju 361-763Republic of Korea Department of Electrical Engineering Yeungnam University214-1 Dae-DongKyongsan 712-749Republic of Korea

In this paper we present a synchronization method for chaotic Lur＇e systems by constructing a new piecewise Lyapunov function. Using a delayed feedback control scheme, a delay-dependent stability criterion is derived for the synchronization of chaotic systems that are represented by Lur＇e systems with deadzone nonlinearity. Based on the Lyapunov-Krasovskii functional and by using some properties of the nonlinearity, a new delay-dependent stabilization condition for synchronization is obtained via linear matrix inequality （LmI） formulation. The criterion is less conservative than existing ones, and it will be verified through a numerical example.

关键词： Lur'e systems synchronization deadzone linear matrix inequality

A new approach to stability analysis of neural networks with time-varying delay via novel Lyapunov-Krasovskii functional

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2010年第5期19卷 115-120页

作者： S.m.Lee o.m.kwon Ju H.Park Department of Electronic Engineering Daegu UniversityGyungsanGyungbuk 712-714Republic of Korea College of Electrical and Computer Engineering 410 SungBong-RoHeungduk-GuChungbuk National UniversityCheongju 361-763Republic of Korea Nonlinear Dynamics Group Department of Electrical EngineeringYeungnam University214-1 Dae-DongKyongsan 712-749Republic of Korea

In this paper, new delay-dependent stability criteria for asymptotic stability of neural networks with time-varying delays are derived. The stability conditions are represented in terms of linear matrix inequalities （LmIs） by constructing new Lyapunov-Krasovskii functional. The proposed functional has an augmented quadratic form with states as well as the nonlinear function to consider the sector and the slope constraints. The less conservativeness of the proposed stability criteria can be guaranteed by using convex properties of the nonlinear function which satisfies the sector and slope bound. Numerical examples are presented to show the effectiveness of the proposed method.

关键词： neural networks Lyapunov-Krasovskii functional sector bound time-delay

Leader-following consensus criteria for multi-agent systems with time-varying delays and switching interconnection topologies

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2012年第11期21卷 144-153页

作者： m.J.Park o.m.kwon Ju H.Park S.m.Lee E.J.Cha School of Electrical Engineering Chungbuk National University Department of Electrical Engineering Yeungnam University School of Electronic Engineering Daegu University Department of Biomedical Engineering School of MedicineChungbuk National University

We consider multi-agent systems with time-varying delays and switching interconnection topologies. By con- structing a suitable Lyapunov-Krasovskii functional and using the reciprocally convex approach, new delay-dependent consensus criteria for the systems are established in terms of linear matrix inequalities （LmIs）, which can be easily solved by using various effective optimization algorithms. Two numerical examples are given to illustrate the effectiveness of the proposed methods.

关键词： consensus multi-agent systems time delay Lyapunov method

Synchronization criteria for coupled Hopfield neural networks with time-varying delays

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2011年第11期20卷 140-150页

This paper proposes new delay-dependent synchronization criteria for coupled Hopfield neural networks with time-varying delays. By construction of a suitable Lyapunov Krasovskii＇s functional and use of Finsler＇s lemma, novel synchronization criteria for the networks are established in terms of linear matrix inequalities （LmIs） which can be easily solved by various effective optimization algorithms. Two numerical examples are given to illustrate the effectiveness of the proposed methods.

关键词： Hopfield neural networks coupling delay synchronization Lyapunov method

Hybrid and enhanced electrokinetic system for soil remediation from heavy metals and organic matter

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第1期147卷 424-450页

作者： Faris m.Hamdi Namuun Ganbat Ali Altaee Akshaya K.Samal Ibrar Ibrar John L.Zhou Adel o.Sharif Centre for Green Technology School of Civil and Environmental EngineeringThe University of Technology Sydney15 BroadwayNSW 2007Australia Department of Civil Engineering Jazan UniversityJazan 82822Saudi Arabia Centre for Nano and material Sciences Jain UniversityRamanagaraBangaloreKarnataka 562112India School of mechanical Sciences Faculty of Engineering and Physical SciencesUniversity of SurreyAustralia

The electrokinetic(EK)process has been proposed for soil decontamination from heavy metals and organic *** advantages of the EK process include the low operating energy,suitability for fine-grained soil decontamination,and no need for *** the last three decades,enhanced and hybrid EK systems were developed and tested for improving the efficiency of contaminants removal from *** enhanced-EK processes exhibited excellent efficiency in removing contaminants by controlling the soil pH or the chemical reaction of *** hybrid systems were tested to overcome environmental hurdles or technical drawbacks of decontamination *** of the EK process with phytoremediation,bioremediation,or reactive filtermedia(RFm)improved the remediation process performance by capturing contaminants or facilitating biological agents’movement in the ***,EK process coupling with solar energy was proposed to treat off-grid contaminated soils or reduce the EK energy *** study reviews recent advancements in the enhancement and hybrid EK systems for soil remediation and the type of contaminants targeted by the *** study also covered the impact of operating parameters,imperfect pollution separation,and differences in the physicochemical characteristics and microstructure of soil/sediment on the EK ***,a comparison between various remediation processes was presented to highlight the pros and cons of these technologies.

关键词： Electrokinetic Soil remediation Reactive filter media Enhanced electrokinetic Contaminants

Seasonal influence on miRNA expression dynamics of extracellular vesicles in equine follicular fluid

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Animal Science and Biotechnology 2025年第1期16卷 136-152页

作者： Jean m.Feugang Ahmed Gad Nico G.menjivar Ghassan m.Ishak Samuel Gebremedhn melba o.Gastal Notsile H.Dlamini Radek Prochazka Eduardo L.Gastal Dawit Tesfaye Department of Animal and Dairy Sciences Mississippi State UniversityMississippi StateMS 39762USA Animal Reproduction and Biotechnology Laboratory(ARBL) Department of Biomedical SciencesCollege of Veterinary Medicine and Biomedical SciencesColorado State UniversityFort CollinsCO 80523USA Department of Animal Production Faculty of AgricultureCairo UniversityGiza 12613Egypt Department of Surgery and obstetrics College of Veterinary MedicineUniversity of BaghdadBaghdad 10011Iraq Animal Science School of Agricultural SciencesSouthern Illinois UniversityCarbondaleIL 62901USA J.R.Simplot Company KunaID 83634USA Institute of Animal Physiology and Genetics Czech Academy of SciencesLiběchov 27721Czech Republic

Background ovarian follicular fluid(FF)is a dynamic environment that changes with the seasons,affecting follicle development,ovulation,and oocyte *** in the follicles release tiny particles called extracellular vesicles(EVs)containing vital regulatory molecules,such as microRNAs(miRNAs).These miRNAs are pivotal in facilitating commu-nication within the follicles through diverse signaling and information transfer ***-coupled miRNA signaling is implicated to be associated with ovarian function,follicle and oocyte growth and response to various environmen-tal ***,we investigated how seasonal variations directly influence the ovulatory and anovulatory states of ovarian follicles and how are they associated with follicular fluid EV-coupled miRNA dynamics in *** Ultrasonographic monitoring and follicular fluid aspiration of preovulatory follicles in horses during the ano-vulatory(spring:non-breeding)and ovulatory(spring,summer,and fall:breeding)seasons and subsequent EV isola-tion and miRNA profiling identified significant variation in EV-miRNA cargo *** identified 97 miRNAs with dif-ferential expression among the groups and specific clusters of miRNAs involved in the spring transition(miR-149,-200b,-206,-221,-328,and-615)and peak breeding period(including miR-143,-192,-451,-302b,-100,and let-7c).Bioinformatic analyses showed enrichments in various biological functions,e.g.,transcription factor activity,transcrip-tion and transcription regulation,nucleic acid binding,sequence-specific DNA binding,p53 signaling,and post-trans-lational *** analyses revealed distinct sets of significantly up-and down-regulated miRNAs associ-ated with spring anovulatory(Cluster 1)and summer ovulation–the peak breeding season(Clusters 4 and 6).Conclusions The findings from the current study shed light on the dynamics of FF-EV-coupled miRNAs in relation to equine ovulatory and anovulatory seasons,and their roles in understanding the

关键词： Extracellular vesicle Follicle growth Follicular fluid Horse mare ovulation Pre-ovulation Seasonal breeding

Combining slow-release fertilizer and plastic film mulching reduced the carbon footprint and enhanced maize yield on the Loess Plateau

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2025年第1期147卷 359-369页

作者： Xiaoqing Han Pengfei Dang Lechen Liao Fangqi Song miaomiao Zhang maoxue Zhang Guoqing Li Shuyue Wen Ning Yang Xiping Pan Xiaofan Wang WenWang Xiaoliang Qin Charles o.Joseph Kadambot H.m.Siddique College of Agronomy Key Laboratory of Crop Physi-ecology and Tillage Science in Northwestern Loess PlateauNorthwest A&F UniversityYanglingShaanxi 712100China Department of Crop Sciences and Beekeeping Technology College of Agricultural Sciences and Food Technology University of Dar es SalaamMwalimu Julius Nyerere Mlimani CampusP.O.Box 35091Dar es SalaamTanzania College of Life Science Yulin UniversityChongwen Road No.4YulinShaanxi719000China The UWA Institute of Agriculture and School of Agriculture&Environment The University of Western AustraliaPerth WA 6001Australia

Agricultural practices significantly contribute to greenhouse gas(GHG)emissions,necessitating cleaner production technologies to reduce environmental pressure and achieve sustainable maize *** film mulching is commonly used in the Loess Plateau *** slow-release fertilizers as a replacement for urea within this practice can reduce nitrogen losses and enhance crop *** these techniques represents a novel agricultural approach in semi-arid ***,the impact of this integration on soil carbon storage(SoCS),carbon footprint(CF),and economic benefits has received limited research ***,we conducted an eight-year study(2015-2022)in the semi-arid northwestern region to quantify the effects of four treatments[urea supplied without plastic film mulching(CK-U),slow-release fertilizer supplied without plastic film mulching(CK-S),urea supplied with plastic film mulching(Pm-U),and slow-release fertilizer supplied with plastic film mulching(Pm-S)]on soil fertility,economic and environmental *** results revealed that nitrogen fertilizer was the primary contributor to total GHG emissions(≥71.97%).Compared to other treatments,Pm-S increased average grain yield by 12.01%-37.89%,water use efficiency by 9.19%-23.33%,nitrogen accumulation by 27.07%-66.19%,and net return by 6.21%-29.57%.Furthermore,Pm-S decreased CF by 12.87%-44.31%and CF per net return by 14.25%-41.16%.After eight years,Pm-S increased SoCS(0-40 cm)by 2.46%,while Pm-U decreased it by 7.09%.These findings highlight the positive effects of Pm-S on surface soil fertility,economic gains,and environmental benefits in spring maize production on the Loess Plateau,underscoring its potential for widespread adoption and application.

关键词： Plastic film mulching Slow-release fertilizer maize grain yield Carbon footprint Economic benefits

Contribution of mechanical forces to structural synaptic plasticity:insights from 3D cellular motility mechanisms

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第7期20卷 1995-1996页

作者： Rita o.Teodoro mafalda Ribeiro Ramos Lara Carvalho iNoVA4Health NOVA Medical School|Faculdade de Ciências MédicasNMS|FCMUniversidade Nova de LisboaLisboaPortugal

Cells,tissues,and organs are constantly subjected to the action of mechanical forces from the extracellular environment-and the nervous system is no ***-intrinsic properties such as membrane lipid composition,abundance of mechanosensors,and cytoskeletal dynamics make cells more or less likely to sense these *** and extrinsic cues are integrated by cells and this combined information determines the rate and dynamics of membrane protrusion growth or retraction(Yamada and Sixt,2019).Cell protrusions are extensions of the plasma membrane that play crucial roles in diverse contexts such as cell migration and neuronal synapse *** the nervous system,neurons are highly dynamic cells that can change the size and number of their pre-and postsynaptic elements(called synaptic boutons and dendritic spines,respectively),in response to changes in the levels of synaptic activity through a process called *** plasticity is a hallmark of the nervous system and is present throughout our lives,being required for functions like memory formation or the learning of new motor skills(minegishi et al.,2023;Pillai and Franze,2024).

关键词： plasticity structural mechanisms

modeling net-charge fluctuations in heavy-ion collisions at the LHC

在线全文

学校读者我要写书评

暂无评论

Chinese Physics C 2025年第1期49卷 281-289页

作者： G.o.Ambaryan A.S.Chernyshov G.Kh.Eyyubova V.L.Korotkikh I.P.Lokhtin S.V.Petrushanko A.m.Snigirev E.E.Zabrodin Physics Department Lomonosov Moscow State UniversityRU-119991 MoscowRussia Skobeltsyn Institute of Nuclear Physics Lomonosov Moscow State UniversityRU-119991 MoscowRussia Bogoliubov Laboratory of Theoretical Physics Joint Institute for Nuclear ResearchRU-141980 DubnaRussia Department of Physics University of OsloN-0316 OsloNorway

Analysis of Pb+Pb data for net-charge fluctuations at LHC energies using the HYDJET++model is *** strongly intensive quantities D and Σ were used to remove the effects related to system volume *** employed two versions of HYDJET++for the *** first one is the standard or default version,whereas the second one is a modification that takes into account explicit event-by-event conservation of the electric net-charge of produced *** inclusion of the canonical net-charge conservation in the model allows for better description of the experimental data obtained by the ALICE and CmS Collaborations.A comparison with calculations from other models is also presented.

关键词： relativistic heavy-ion collisions net-charge fluctuations strongly intensive variables canonical charge conservation