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An Ensemble Forecast of the south China sea Monsoon

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Advances in Atmospheric sciences 1999年第2期16卷 159-182页

作者： t.n.Krishnamurti Mukultewari EdBensman Department of Meteorology Florida State University Tallahassee FL

this paper presents a generalized ensemble forecast procedure for the tropical latitudes. here we propose an empirical orthogonal function-based procedure for the definition of a seven-member ensemble. the wind and the temperature fields are perturbed over the global tropics. Although the forecasts are made over the global belt with a high-resolution model, the emphasis of this study is on a south China sea monsoon. Over this domain of the south China sea includes the passage of a tropical storm, Gary, that moved eastwards north of the Philippines. the ensemble forecast handled the precipitation of this storm reasonably well. A global model at the resolution triangular truncation 126 waves is used to carry out these seven forecasts. the evaluation of the ensemble of forecasts is carried out via standard root mean square errors of the precipitation and the wind fields. the ensemble average is shown to have a higher skill compared to a control experiment, which was a first analysis based on operational data sets over both the global tropical and south China sea domain. All of these experiments were subjected to physical initialization which provides a spin-up of the model rain close to that obtained from satellite and gauge-based estimates. the results furthermore show that inherently much higher skill resides in the forecast precipitation fields if they are averaged over area elements of the order of 4° latitude by 4° longitude squares.

关键词： Ensemble forecast triangular truncation

Mechanical, piezoelectric and some thermal properties of(B3) BP under pressure

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Journal of Central south University 2014年第1期21卷 58-64页

作者： s.DAOUD n.BIOUD n.LEBGAA Faculty of science and technology University of Bordj Bou-Arreridj Optoelectronics and Compounds Laboratory Ferhat Abbes University

some compounds of group III-V semiconductor materials exhibit very good piezoelectric,mechanical,and thermal properties and their use in surface acoustic wave(sAW) devices operating specially at Ghz *** materials have been appreciated for a long time due to their high acoustic velocities,which are important parameters for active microelectromechanical systems(MEMs) *** this object,first-principles calculations of the anisotropy and the hydrostatic pressure effect on the mechanical,piezoelectric and some thermal properties of the(B3) boron phosphide are presented,using the density functional perturbation theory(DFPt).the independent elastic and compliance constants,the Reuss modulus,Voigt modulus,and the shear modulus,the Kleinman parameter,the Cauchy and Born coefficients,the elastic modulus,and the Poisson ratio for directions within the important crystallographic planes of this compound under pressure are *** direct and converse piezoelectric coefficients,the longitudinal,transverse,and average sound velocity,the Debye temperature,and the Debye frequency of(B3) boron phosphide under pressure are also presented and compared with available experimental and theoretical data of the literature.

关键词： (B3) BP compound mechanical properties pressure and anisotropy effect thermal properties

Bound states Energies of a harmonic Oscillator Perturbed by Point Interactions

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Communications in theoretical Physics 2017年第3期67卷 241-249页

作者： n.Ferkous t.Boudjedaa Laboratory of theoretical Physics Department of Physics University of Jijel PB 98 Ouled Aissa DZ-18000 Jijel Algeria

We determine explicitly the exact transcendental bound states energies equation for a one-dimensional harmonic oscillator perturbed by a single and a double point interactions via Green's function techniques using both momentum and position space representations. the even and odd solutions of the problem are discussed. the corresponding limiting cases are recovered. For the harmonic oscillator with a point interaction in more than one dimension,divergent series appear. We use to remove this divergence an exponential regulator and we obtain a transcendental equation for the energy bound states. the results obtained here are consistent with other investigations using different methods.

关键词： Green's function delta potential harmonic oscillator regularization

Complementary roles of glial cells in generating region-specific neuroinflammatory responses and phagocytosis in Parkinson’s disease

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neural Regeneration Research 2025年第10期20卷 2917-2918页

作者： Leyre Ayerra Maria s.Aymerich Universidad de navarra Facultad de CienciasDepartamento de Bioquímica y GenéticaPamplonaSpain CIMA-Universidad de navarra PamplonaSpain IdisnA Instituto de Investigación Sanitaria de NavarraPamplonaSpain

neuroinflammation is associated with Parkinson’s disease:Reactive gliosis and neuroinflammation are hallmarks of Parkinson’s disease(PD),a multisystem neurodegenerative disorder characterized by a progressive loss of dopaminergic *** has long been considered a mere consequence of neuronal loss,but whether it promotes PD or is a key player in disease progression remains to be *** leukocyte antigen.

关键词： inflammation leukocyte generating

Multisubband electron mobility in a parabolic quantum well structure under the influence of an applied electric field

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Journal of semiconductors 2014年第1期35卷 1-6页

作者： n.sahoo t.sahu Department of Electronic science Berhampur University Department of Electronics and Communication Engineering National Institute of Science and Technology

We study the multisubband electron mobility in a barrier delta doped AlχGal-χAs parabolic quantum well structure under the influence of an applied electric field perpendicular to the interface plane. We consider the alloy fraction χ = 0.3 for barriers and vary x from 0.0 to 0.1 for the parabolic well. Electrons diffuse into the well and confine within the triangular like potentials near the interfaces due to Coulomb interaction with ionized donors. the parabolic structure potential, being opposite in nature, partly compensates the Coulomb potential. the external electric field further amends the potential structure leading to an asymmetric potential profile. Accordingly the energy levels, wave functions and occupation of subbands change. We calculate low temperature electron mobility as a function of the electric field and show that when two subbands are occupied, the mobility is mostly dominated by ionised impurity scattering mediated by intersubband effects. As the field increases transition from double subband to single subband occupancy occurs. A sudden enhancement in mobility is obtained due to curtailment of intersubband effects. thereafter the mobility is governed by both impurity and alloy disorder scatterings. Our analysis of mobility as a function of the electric field for different structural parameters shows interesting results.

关键词： parabolic quantum well multisubband electron mobility AlGaAs

Understanding activity of butyrate at a cellular level

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neural Regeneration Research 2025年第8期20卷 2323-2324页

作者： Prapti Chakraborty Angela s.Laird Macquarie University Motor neuron Disease Research Centre Macquarie Medical SchoolFaculty of MedicineHealth and Human SciencesMacquarie UniversitySydneyAustralia

Butyrate is a short-chain fatty acid of four carbons in length that is a by-product produced by the microbial fermentation of dietary fiber and undigested carbohydrates within the *** the years,butyrate has attracted ... 详细信息

关键词： carbons butyrate fiber

tectonics induced switching of provenance during the Late Quaternary aggradation of the Indus River Valley, Ladakh, India

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Geoscience Frontiers 2019年第1期10卷 285-297页

作者： Ravish Lal h.s.saini n.C.Pant s.A.I.Mujtaba Department of Geology University of Delhi Geological survey of India

the Indus River flows through Ladakh, one of the driest and coldest places on earth, in a tectonically active domain. Fluvial, glaciofluvial, lacustrine and debris dominated sequences represent the Late Quaternary sedimentary record along the river course. Karakoram Fault, a major crustal scaled feature reported to be active during the Quaternary, is associated with the Indus River drainage. Linkages between a major, active fault and deposits formed during the activity period of the fault are explored using heavy mineral deduced provenance and Optically stimulated Luminescence(OsL) *** deposits in a ~200 km long stretch of the Indus River have been examined for a ~80 ka period to decipher the climate linked aggradation history. Damming of the Indus River at ~79 ka and existence of the spituk Lake for >30 ka is demonstrated. Using geology of the provenance in relation to the mineralogical attributes of the Quaternary deposits, the major drainage reorganization when the connection of the tangtse Valley to the Indus was blocked, is inferred at ~73 ka. It is supported by the geologicalgeomorphological evidence. the study demonstrates the application of provenance linked mineralogy in terrestrial aggradation in a tectonically active region.

关键词： Karakoram Fault Indus Drainage reorganization heavy minerals Aggradation

Microglial dysfunction and genetic risk for neurodegenerative disease

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neural Regeneration Research 2025年第5期20卷 1401-1402页

作者： Debra s.MacDonald Jay Penney Department of Biomedical sciences AVCUniversity of Prince Edward IslandCharlottetownPECanada

neurodegenerative disorders such as Alzheimer's and Parkinson's diseases a re increasing in prevalence as world populations *** tremendous progress has been made,our understanding of the mechanisms that underlie the development of these diseases remains far from com *** troubling,despite the growing emotional and financial toll being to ken by neurodegenerative disorders,existing treatment options are limited almost exclusively to those that help manage symptoms but that lack the ability to alter the progression of the disease(Liu et al.,2022).

关键词： degenerative diseases

software Vulnerabilities Overview:A Descriptive study

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tsinghua science and technology 2020年第2期25卷 270-280页

作者： Mario Calín sánchez Juan Manuel Carrillo de Gea José Luis Fernández-Alemán Jesús Garcerán Ambrosio toval the Department of Informatics and systems Faculty of Computer ScienceUniversity of Murcia

Computer security is a matter of great *** the last decade there have been numerous cases of cybercrime based on the exploitation of software *** fact has generated a great social concern and a greater importance of computer security as a *** this work,the most important vulnerabilities of recent years are identified,classified,and categorized individually.A measure of the impact of each vulnerability is used to carry out this classification,considering the number of products affected by each vulnerability,as well as its *** addition,the categories of vulnerabilities that have the greatest presence are *** on the results obtained in this study,we can understand the consequences of the most common vulnerabilities,which software products are affected,how to counteract these vulnerabilities,and what their current trend is.

关键词： descriptive study software security software vulnerabilities vulnerability databases