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Boundary Control of Coupled Non-Constant Parameter systems of Time Fractional PDEs with Different-Type Boundary Conditions

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Journal of systems science & Complexity 2023年第1期36卷 273-293页

作者： CHEN juan ZHUANG Bo Aliyun school of Big Data Changzhou UniversityChangzhou 213164China school of Information Engineering Binzhou UniversityBinzhou 256600China

This paper addresses a boundary state feedback control problem for a coupled system of time fractional partial differential equations(PDEs)with non-constant(space-dependent)coefficients and different-type boundary conditions(BCs).The BCs could be heterogeneous-type or ***,this coupled system has different BCs at the uncontrolled side for heterogeneous-type and the same BCs at the uncontrolled side for *** main contribution is to extend PDE backstepping to the boundary control problem of time fractional PDEs with space-dependent parameters and different-type *** the backstepping transformation and the fractional Lyapunov method,the Mittag-Leffler stability of the closed-loop system is obtained.A numerical scheme is proposed to simulate the fractional case when kernel equations have not an explicit solution.

关键词： Boundary control coupled systems heterogeneous mittag-leffler stability time fractional PDEs with space-dependent coefficients

A Note on the stability of Geodesics on Diffeomorphism Groups with One-side Invariant Metric

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Acta Mathematica sinica,English series 2020年第5期36卷 620-630页

作者： Li juan ZHOU school of Mathematical sciences Inner Mongolia UniversityHohhot 0010021P.R.China

In this note,we consider the stability of geodesics on volume-preserving diffeomorphism groups with one-side invariant *** showed that for non-Beltrami fields on a three-dimensional compact manifold,there does not exist Eulerian stable flow which is Lagrangian exponential *** noticed that a stationary flow corresponding to the KdV equation can be Eulerian stable while the corresponding motion of the fluid is at most exponentially unstable.

关键词： Volume-preserving diffeomorphism group Bott-Virasoro group Euler equation geodesic Eulerian instability Lagrangian instability

Porphyrinic Acceptors forFullerene-Free MolecularPhotovoltaics

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CCs Chemistry 2024年第2期6卷 276-296页

作者： Jorge Labella juan Laforga-Martin Tomás Torres Department of Organic Chemistry Universidad Aut´onoma de Madrid28049 Madrid Institute for Advanced Research in Chemical sciences Universidad Aut´onoma de MadridMadrid IMDEA—Nanociencia 28049 Madrid

Over the past few years,the development of nonfullerene acceptors(NFAs)has become a prominent focus in both organic and perovskite solar cell(OsCs and PsCs,respectively)research *** this context,porphyrinoids,compounds structurally related to porphyrins,have emerged as promising solar cell *** contrast to the widely used fullerene acceptors,porphyrinoids exhibit strong,broad absorption properties across the UV–vis/NIR spectrum,which can be easily tuned through chemical ***,they can be prepared and derivatized using cost-effective and straightforward methodologies,allowing for convenient adjustments in thin-film morphology,processability,supramolecular organization,and energy ***,these compounds offer higher thermal and photochemical stability,resulting in longer device lifetimes compared to their fullerene-based *** this review,we outline the utilization of porphyrinoids as NFAs in OsCs and PsCs,discussing essential aspects such as design guidelines,molecular properties,and device *** goal is to inspire and further promote the development of n-type porphyrinoids,which have not yet fully unleashed their potential.

关键词： fullerene-free molecular photovoltaics nonfullerene acceptors porphyrinic acceptors n-type porphyrinoids organic and perovskite solar cells

Regulation of the mesenchymal stem cell fate by interleukin-17: Implications in osteogenic differentiation

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World Journal of stem Cells 2021年第11期13卷 1696-1713页

作者： Jelena Krstić slavko Mojsilović sonja s Mojsilović juan F santibanez Gottfried schatz Research Center Medical University of GrazGraz 8010Austria Group for Hematology and stem Cells Institute for Medical ResearchNational Institute of Republic of SerbiaUniversity of BelgradeBelgrade 11129Serbia Group for Immunology Institute for Medical ResearchNational Institute of Republic of SerbiaBelgrade 11129Serbia Group for Molecular Oncology Institute for Medical ResearchNational Institute of Republic of SerbiaUniversity of BelgradeBelgrade 11000Serbia Centro Integrativo de Biología y Química Aplicada Universidad Bernardo O’HigginsChile 8370993Chile

Bone regeneration is a tightly regulated process that ensures proper repair and functionality after *** delicate balance between bone formation and resorption is governed by cytokines and signaling molecules released during the inflammatory ***(IL)-17A,produced in the early phase of inflammation,influences the fate of *** to their inherent capacity to differentiate into osteoblasts,mesenchymal stem/stromal cells(MsCs)contribute to bone healing and *** review presents an overview of IL-17A signaling and the leading cellular and molecular mechanisms by which it regulates the osteogenic differentiation of *** main findings demonstrating IL-17A’s influence on osteoblastogenesis are *** this end,divergent information exists about the capacity of IL-17A to regulate MsCs’osteogenic fate,depending on the tissue context and target cell type,along with contradictory findings in the same cell ***,we summarize the data showing both the pro-osteogenic and anti-osteogenic roles of IL-17,which may help in the understanding of IL-17A function in bone repair and regeneration.

关键词： Interleukin-17 Mesenchymal stem cells Osteoblast Bone Osteogenesis Inflammation

Integrated vision-based system for efficient,semi-automated control of a robotic manipulator

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International Journal of Intelligent Computing and Cybernetics 2014年第3期7卷 253-266页

作者： Hairong Jiang juan P.Wachs Bradley s.Duerstock school of Industrial Engineering Purdue UniversityWest LafayetteIndianaUSA Weldon school of Biomedical Engineering School of Industrial EngineeringPurdue UniversityWest LafayetteIndianaUSA

Purpose–The purpose of this paper is to develop an integrated,computer vision-based system to operate a commercial wheelchair-mounted robotic manipulator(WMRM).In addition,a gesture recognition interface system was developed specially for individuals with upper-level spinal cord injuries including object tracking and face recognition to function as an efficient,hands-free WMRM ***/methodology/approach–Two Kinects cameras were used synergistically to perform a variety of simple object retrieval *** camera was used to interpret the hand gestures and locate the operator’s face for object positioning,and then send those as commands to control the *** other sensor was used to automatically recognize different daily living objects selected by the *** object recognition module employing the speeded Up Robust Features algorithm was implemented and recognition results were sent as a commands for“coarse positioning”of the robotic arm near the selected *** face detection was provided as a shortcut enabling the positing of the objects close by the subject’s ***–The gesture recognition interface incorporated hand detection,tracking and recognition algorithms,and yielded a recognition accuracy of 97.5 percent for an eight-gesture ***’completion time were conducted to compare manual(gestures only)and semi-manual(gestures,automatic face detection,and object recognition)WMRM control *** use of automatic face and object detection significantly reduced the completion times for retrieving a variety of daily living ***/value–Integration of three computer vision modules were used to construct an effective and hand-free interface for individuals with upper-limb mobility impairments to control a WMRM.

关键词： Gesture recognition Object recognition spinal cord injuries Wheelchair-mounted robotic arm

The relationship between morphology and flight in Drosophila:a study of two pairs of sibling species from a natural population

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Insect science 2024年第3期31卷 885-900页

作者： Nicolás Flaibani Victoría Estefania Ortiz juan JoséFanara Valeria Paula Carreira Laboratorio de Evolucion Departamento de EcologiaGenética y Evolucion(DEGE)Facultad de Ciencias Exactas y Naturales(FCEN)Universidad de Buenos Aires(UBA)Instituto de GenéticaEcologia y Evolucion de Buenos Aires(IEGEBA)Consejo Nacional de Investigaciones Cientificasy Tecnicas(CONICET)-UBABuenos AiresArgentina

Insect flight is a complex trait involved in different behaviors,from the search for sexual partners,food,or breeding *** studies have postulated the adaptive advantages of certain morphological traits in relation to increased flight capacity,such as low values of wing loading or high values of wing:thorax ratio and wing-aspect ***,few studies have evaluated the relationship between variables related to flight and morphological traits in *** work aimed to study morphological traits in males and females of two pairs of sibling species:Drosophila buzzati Patterson and Wheeler-Drosophila koeferae Fontdevila and Wasserman,and Drosophila melanogaster Meigen-Drosophila simulans sturtevant,and to analyze its relationship with *** detected the highest proportion of flight time in *** and *** compared to *** and ***,*** results also revealed sexual dimorphism,with males exhibiting a higher proportion of flight time than ***,we did not find a general pattern to explain the relationship between morphology and the proportion of flight time because associations varied depending upon the analyses(considering all groups together or each sex-species combination separately).Moreover,these associations explained a low percentage of variation,suggesting that other nonmorphological components related to flight,such as physiological variables,should be taken into *** work allowed us to show the variability and complexity of an aspect of flight,suggesting that the adaptive role of the morphological traits studied might have been overestimated.

关键词： morphological traits time in flight wing loading wing:thorax ratio wingaspect ratio wing second moment of area

A summary of Copepoda:synthesis,trends,and ecological impacts

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Journal of Oceanology and Limnology 2023年第3期41卷 1050-1072页

作者： Vinod VAKATI juan Manuel FUENTEs-REINÉs Pengbin WANG Jun WANG steven DODsWORTH Key Laboratory of Conservation and Utilization of Fish Resources College of Life SciencesNeijiang Normal UniversityNeijiang 641100China Universidad del Magdalena Grupo de Investigación en Biodiversidad y Ecología AplicadaSanta Marta AA 731Colombia Key Laboratory of Marine Ecosystem Dynamics the Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China Fourth Institute of Oceanography Ministry of Natural ResourcesBeihai 536000China Department of Life science College of Natural SciencesHanyang UniversitySeoul 04763Republic of Korea school of Biological sciences University of PortsmouthPortsmouth PO12DYUnited Kingdom

Copepoda are one of the most significant animal groups present in aquatic ***,evolutionary biologists,and biotechnologists continue to test new methods to study the application of Copepoda as model organisms in various fields of pure and applied science,from evolution and ecology to aquaculture as live feed,as biological control of mosquito larvae,as biological indicators of water and sediment quality,in environmental monitoring and as a source of protein in the food *** paper reviews the current progress and trends within copepod research from a number of different *** emphasize the importance of Copepoda and the necessity of strengthening research on various topics related to copepod biology,some of which are of great significance to local sustainable development.

关键词： bioindicators aquaculture pollutants eutrophication nutrition halotolerance

Overview of Rubik's Cube and Reflections on Its Application in Mechanism

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Chinese Journal of Mechanical Engineering 2018年第4期31卷 9-20页

作者： Da-Xing Zeng Ming Li juan-juan Wang Yu-Lei Hou Wen-juan Lu Zhen Huang school of Mechanical Engineering Yanshan University

Rubik’s Cube is a widely popular mechanical puzzle that has attracted attention around the world because of its unique characteristics. As a classic brain-training toy well known to the public, Rubik’s Cube was used for scientific research and technology development by many scholars. This paper provides a basic understanding of the Rubik’s Cube and shows its mechanical art from the aspects of origin and development, characteristics, research status and especially its mechanical engineering design, as well as making a vision for the application in mechanism. First, the invention and origin of Rubik’s Cube are presented, and then the special characteristics of the cube itself are *** that, the present researches of Rubik’s Cube are reviewed in various disciplines at home and abroad, including the researches of Rubik’s Cube scientific metaphors, reduction algorithms, characteristic applications, and mechanism issues. Finally, the applications and prospects of Rubik’s Cube in the field of mechanism are discussed.

关键词： Rubik's Cube scientific research Mechanical art Application and prospects

Pair production in inhomogeneous electric fields with phase modulation

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Communications in Theoretical Physics 2023年第2期75卷 60-72页

作者： Li-Na Hu Orkash Amat Lie-juan Li Melike Mohamedsedik B s Xie Key Laboratory of Beam Technology of the Ministry of Education and College of Nuclear Science and TechnologyBeijing Normal UniversityBeijing 100875China Institute of Radiation Technology Beijing Academy of Science and TechnologyBeijing 100875China

Electron-positron pair production in spatial inhomogeneous electric fields with sinusoidal phase modulation is studied within the Dirac-Heisenberg-Wigner *** focus is on discussing the effects of the modulation parameters on the momentum spectrum and the reduced particle number at various spatial *** the momentum spectrum,the interference effect becomes more and more remarkable with the increase of modulated amplitude or frequency,while the symmetry is severely destroyed with modulated *** the reduced particle number,it is greatly enhanced by about a few times and evenly one order of magnitude when modulation parameters are ***,the effect of spatial scales on the reduced particle number is carefully examined,and it is found that it increases rapidly at small spatial scales,while it tends to be a constant at large spatial *** also obtain the optimal pair production that can be achieved through different *** results can provide a possibility for realizing the optimal pair production by combining the advantages of field spatial inhomogeneity with different choices of phase modulation.

关键词： inhomogeneous phase momentum