检索结果-南通市图书馆

Computers, Materials & Continua 2020年第11期65卷 1649-1670页

作者： s.b.manoojkumaar C.Poongodi Department of Computer science and Engineering J.K.K.Munirajah College of TechnologyGobichettipalayamErode638506India Department of Electronics and Communication Engineering Bannari Amman Institute of TechnologySathyamangalamErode638401India

Maximizing network lifetime is measured as the primary issue in Mobile Ad-hoc Networks(MANETs).In geographically routing based models,packet transmission seems to be more appropriate in dense *** involvement of the Heuristic model directly is not appropriate to offer an effectual solution as it becomes NP-hard issues;therefore investigators concentrate on using Meta-heuristic *** Optimization(DFO)is an effective meta-heuristic approach to resolve these problems by providing optimal ***,Meta-heuristic approaches(DFO)turn to be slower in convergence problems and need proper computational time while expanding network ***,DFO is adaptively improved as Adaptive Dragonfly Optimization(ADFO)to fit this model and re-formulated using graph-based m-connection establishment(G-𝑚𝑚CE)to overcome computational time and DFO’s convergence based problems,considerably enhancing DFO ***(G-𝑚𝑚CE),Connectivity Zone(CZ)is chosen among source to destination in which optimality should be under those connected regions and ADFO is used for effective route establishment in CZ indeed of complete networking *** measure complementary features of ADFO and(G-𝑚𝑚CE),hybridization of DFO-(G-𝑚𝑚CE)is anticipated over dense circumstances with reduced energy consumption and delay to enhance network *** simulation was performed in MATLAb environment.

关键词： Routing connectivity zone ADFO mobile ad-hoc network graph-based m-connection establishment

Neuroinflammation revisited through the microglial lens

维普期刊数据库评论

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 1989-1990页

作者： Renato socodato João b.Relvas Institute of Research and Innovation in Health(i3s)and Institute for Molecular and Cell biology(IbMC) University of PortoPortoPortugal Department of biomedicine Faculty of Medicine of the University of Porto(FMUP)PortoPortugal

Neuroimmunology is emerging as a pivotal field,shedding light on the intricate dialogues between the central nervous system(CNs)and the immune *** exploration is particularly significant in understanding microglia,the CNs’s innate immune cells,beyond the conventional conflation of“neuroinflammation”and“microglial activation.”This conflation has clouded the true complexity of these processes,potentially stalling scientific progress and the development of new *** challenge the long-standing perspectives that have oversimplified these interactions,advocating for a deeper exploration of the dynamic relationship between neuroinflammation and microglial *** dissecting specific molecular pathways,we aim to illuminate their elaborate roles in neuroinflammatory responses,especially in the context of Alzheimer’s disease(AD).Here,neuroinflammation is not merely a passive observer or a direct antagonist but a complex agent in the disease’s *** article calls for a significant paradigm shift towards an integrative,multi-omics approach to *** such a comprehensive framework is crucial for advancing our understanding of neuroinflammatory conditions and paving the way for targeted therapeutic strategies for brain diseases.

关键词： inflammation simplified activation

brain-derived neurotrophic factor signaling in the neuromuscular junction during developmental axonal competition and synapse elimination

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2025年第2期20卷 394-401页

作者： Josep Tomàs Víctor Cilleros-Mañé Laia Just-borràs Marta balanyà-segura Aleksandra Polishchuk Laura Nadal Marta Tomàs Carolina silvera-simón Manel M.santafé Maria A.Lanuza Unitat d’Histologia i Neurobiologia(UHNeurob) Facultat de Medicina i Ciències de la SalutUniversitat Rovira i VirgiliReusSpain

During the development of the nervous system,there is an overproduction of neurons and *** competition between neighboring nerve endings and synapses performing different activity levels leads to their elimination or *** have extensively studied the involvement of the brain-derived neurotrophic factor-Tropomyosin-related kinase b receptor neurotrophic retrograde pathway,at the neuromuscular junction,in the axonal development and synapse elimination process versus the synapse *** purpose of this review is to describe the neurotrophic influence on developmental synapse elimination,in relation to other molecular pathways that we and others have found to regulate this *** particular,we summarize our published results based on transmitter release analysis and axonal counts to show the different involvement of the presynaptic acetylcholine muscarinic autoreceptors,coupled to downstream serine-threonine protein kinases A and C(PKA and PKC)and voltage-gated calcium channels,at different nerve endings in developmental *** dynamic changes that occur simultaneously in several nerve terminals and synapses converge across a postsynaptic site,influence each other,and require careful studies to individualize the mechanisms of specific *** describe an activity-dependent balance(related to the extent of transmitter release)between the presynaptic muscarinic subtypes and the neurotrophin-mediated Trkb/p75NTR pathways that can influence the timing and fate of the competitive interactions between the different axon *** downstream displacement of the PKA/PKC activity ratio to lower values,both in competing nerve terminals and at postsynaptic sites,plays a relevant role in controlling the elimination of supernumerary ***,calcium entry through L-and P/Q-subtypes of voltage-gated calcium channels(both channels are present,together with the N-type channel in developing nerve terminals)contributes to red

关键词： acetylcholine release adenosine receptors axonal competition brain-derived neurotrophic factor calcium channels motor end-plate muscarinic acetylcholine receptors postnatal synapse elimination serine kinases tropomyosin-related kinase receptorb

Nonsmooth semi-Infinite Minmax Programming Involving Generalized(Φ, ρ)-Invexity

在线全文

学校读者我要写书评

暂无评论

Journal of systems science & Complexity 2015年第4期28卷 857-875页

作者： UPADHYAY b b MIsHRA s K Department of basic sciences & Humanities National Institute of Technology

This paper introduces some new generalizations of the concept of （~, p）-invexity for non- differentiable locally Lipschitz functions using the tools of Clarke subdifferential. These functions are used to derive the necessary and sufficient optimality conditions for a class of nonsmooth semi-infinite minmax programming problems, where set of restrictions are indexed in a compact set. Utilizing the sufficient optimality conditions, the authors formulate three types of dual models and establish weak and strong duality results. The results of the paper extend and unify naturally some earlier results from the literature.

关键词： Duality, generalized invexity locally Lipschitz functions, minmax programming, semi-infinite programming.

A comprehensive approach to an equation of state for hard spheres and Lennard Jones fluids

在线全文

学校读者我要写书评

暂无评论

Chinese Physics b 2011年第8期20卷 271-278页

作者： s.b.Khasare 90 New Jagruti Colony Katol Road NagpurIndia

We present a simple method of obtaining various equations of state for hard sphere fluid in a simple unifying way. We will guess equations of state by using suitable axiomatic functional forms （n = 1, 2, 3, 4, 5） for surface tension sn （r）, r≥ d/2 with intermolecular separation r as a variable, where m is an arbitrary real number （pole）. Among the equations of state obtained in this way are Percus-Yevick, scaled particle theory and Carnahan-starling equations of state. In addition, we have found a simple equation of state for the hard sphere fluid in the region that represents the simulation data accurately. It is found that for both hard sphere fluids as well as Lennard-Jones fluids, with m = 3/4 the derived equation of state （EOs） gives results which are in good agreement with computer simulation results. Furthermore, this equation of state gives the Percus-Yevick （pressure） EOs for the m = 0, the Carnahan-starling EOs for rn = 4/5, while for the value of m = 1 it corresponds to a scaled particle theory EOs.

关键词： equation of state Lennard-Jones potential hard-sphere potential computer algebra,computer simulation

Thermodynamic study of fluid in terms of equation of state containing physical parameters

在线全文

学校读者我要写书评

暂无评论

Chinese Physics b 2015年第1期24卷 382-387页

作者： s.b.Khasare Department of Physics science College Congress Nagar Nagpur Maharashtra State India

We introduce a simple condition for one mole fluid by considering the thermodynamics of molecules pointing towards the effective potential for the cluster. Efforts are made to estimate new physical parameter f in liquid state using the equation of state containing only two physical parameters such as the hard sphere diameter and binding energy. The temperature dependence of the structural properties and the thermodynamic behavior of the clusters are studied. Computations based on f predict the variation of numbers of particles at the contact point of the molecular cavity（radial distribution function）.From the thermodynamic profile of the fluid, the model results are discussed in terms of the cavity due to the closed surface along with suitable energy. The present calculation is based upon the sample thermodynamic data for n-hexanol, such as the ultrasonic wave, density, volume expansion coefficient, and ratio of specific heat in the liquid state, and it is consistent with the thermodynamic relations containing physical parameters such as size and energy. since the data is restricted to n-hexanol, we avoid giving the physical meaning of f, which is the key parameter studied in the present work.

关键词： equations of state Lenard–Jones potential hard-sphere potential

Negative refractions by triangular lattice sonic crystals in partial band gaps

在线全文

学校读者我要写书评

暂无评论

Chinese Physics b 2015年第4期24卷 310-321页

作者： s.Alagoz b.b.Alagoz A.sahin s.Nur Department of Physics Inonu University Department of Electrical and Electronics Engineering Inonu University Vocational school of Health services Medical Imaging Techniques Inonu University

This study numerically demonstrates the effects of partial band gaps on the negative refraction properties of sonic crystal. The partial band gap appearing at the second band edge leads to the efficient transmissions of scattered wave envelopes in the transverse directions inside triangular lattice sonic crystal, and therefore enhances the refraction property of sonic crystal. Numerical simulation results indicate a diagonal guidance of coupled scattered wave envelopes inside crystal structure at the partial band gap frequencies and then output waves are restored in the vicinity of the output interface of sonic crystal by combining phase coherent scattered waves according to Huygens＇ principles. This mechanism leads to two operations for wavefront engineering： one is spatial wavefront shifting operation and the other is convex-concave wavefront inversion operation. The effects of this mechanism on the negative refraction and wave focalization are investigated by using the finite difference time domain （FDTD） simulations. This study contributes to a better understanding of negative refraction and wave focusing mechanisms at the band edge frequencies, and shows the applications of the slab comer beam splitting and sC-air multilayer acoustic system.

关键词： sonic crystal negative refraction wave focusing partial band gap

Perturbation and variational approach for the equation of state for hard-sphere and Lennard-Jones fluids

在线全文

学校读者我要写书评

暂无评论

Chinese Physics b 2012年第4期21卷 383-395页

作者： s. b. Khasare Department of Physics Science College Congress Nagar Nagpur India

The present work uses the concept of a scaled particle along with the perturbation and variation approach, to develop an equation of state （EOs） for a mixture of hard sphere （Hs）, Lennar-Jones （L J） fluids. A suitable flexible functional form for the radial distribution function G（R） is assumed for the mixture, with R as a variable. The function G（R） has an arbitrary parameter m and a different equation of state can be obtained with a suitable choice of m. For m = 0.75 and m = 0.83 results are close to molecular dynamics （MD） result for pure Hs and LJ fluid respectively.

关键词： equation of state Lennard-Jones potential hard-sphere potential liquid mixture com- puter simulation

Dynamics of the plane and solitary waves in a Noguchi network:Effects of the nonlinear quadratic dispersion

在线全文

学校读者我要写书评

暂无评论

Chinese Physics b 2020年第3期29卷 105-111页

作者： s A T Fonkoua M s Ngounou G R Deffo F b Pelap s b Yamgoue A Fomethe Unite de Recherche de Matiere Condensee d’Electronique et de Traitement du signal(UR-MACETs) Faculte des SciencesUniversite de DschangBP 67 DschangCameroun Unite de Recherche de Mecanique et de Modelisation des systemes Physiques(UR-2MsP) Faculte des SciencesUniversite de DschangBP 69 DschangCameroun Department of Physics Higher Teacher Training College BambiliUniversity of BamendaP.O.Box 39 BamendaCameroon

We consider a modified Noguchi network and study the impact of the nonlinear quadratic dispersion on the dynamics of modulated waves. In the semi-discrete limit, we show that the dynamics of these waves are governed by a nonlinear cubic schrodinger equation. From the graphical analysis of the coefficients of this equation, it appears that the nonlinear quadratic dispersion counterbalances the effects of the linear dispersion in the frequency domain. Moreover, we establish that this nonlinear quadratic dispersion provokes the disappearance of some regions of modulational instability in the dispersion curve compared to the results earlier obtained by Pelap et al.(Phys. Rev. E 91 022925(2015)). We also find that the nonlinear quadratic dispersion limit considerably affects the nature, stability, and characteristics of the waves which propagate through the system. Furthermore, the results of the numerical simulations performed on the exact equations describing the network are found to be in good agreement with the analytical predictions.

关键词： Noguchi network nonlinear quadratic dispersion modulational instability soliton

separation of hematite from banded hematite jasper(bHJ) by magnetic coating

在线全文

学校读者我要写书评

暂无评论

Journal of Central south University 2015年第2期22卷 437-444页

作者： subhashree singh H.sahoo s.s.Rath b.b.Palei b.Das CsIR-Institute of Minerals and Materials Technology

The separation of iron oxide from banded hematite jasper(bHJ) assaying 47.8% Fe, 25.6% si O2 and 2.30%Al2O3 using selective magnetic coating was studied. Characterization studies of the low grade ore indicate that besides hematite and goethite,jasper, a microcrystalline form of quartzite, is the major impurity associated with this ore. beneficiation by conventional magnetic separation technique could yield a magnetic concentrate containing 60.8% Fe with 51% Fe recovery. In order to enhance the recovery of the iron oxide minerals, fine magnetite, colloidal magnetite and oleate colloidal magnetite were used as the coating material. When subjected to magnetic separation, the coated ore produces an iron concentrate containing 60.2% Fe with an enhanced recovery of56%. The AFM studies indicate that the coagulation of hematite particles with the oleate colloidal magnetite facilitates the higher recovery of iron particles from the low grade bHJ iron ore under appropriate conditions.

关键词： banded hematite jasper ore selective coating oleate colloidal magnetite magnetic separation atomic force microscopy