检索结果-南通市图书馆

Multiple Integral Inequalities for schur Convex Functions on symmetric and Convex Bodies

在线全文

学校读者我要写书评

暂无评论

Analysis in Theory and Applications 2023年第1期39卷 1-15页

作者： silvestru sever dragomir Mathematics College of Engineering&ScienceVictoria UniversityMelbourne CityMC 8001Australia DsT-NRF Centre of Excellence in the Mathematical and Statistical SciencesSchool of Computer Science&Applied MathematicsUniversity of the WitwatersrandPrivate Bag 3Johannesburg 2050South Africa

In this paper,by making use of Divergence theorem for multiple integrals,we establish some integral inequalities for schur convex functions defined on bodies B⊂R^(n)that are symmetric,convex and have nonempty *** for ... 详细信息

关键词： schur convex functions multiple integral inequalities

Energy states of the Hulthen plus Coulomb-like potential with position-dependent mass function in external magnetic fields

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 Physics B 2018年第2期27卷 234-238页

作者： M Eshghi R sever s M Ikhdair Young Researchers and Elite Club Central Tehran Branch Islamic Azad University Department of Physics Middle East Technical University Department of Physics Faculty of Science An-Najah National University Department of Electrical Engineering Near East University

We need to solve a suitable exponential form of the position-dependent mass （PDM） schr6dinger equation with a charged particle placed in the Hulthen plus Coulomb-like potential field and under the actions of the external magnetic and Aharonov-Bohm （AB） flux fields. The bound state energies and their corresponding wave functions are calculated for the spatially-dependent mass distribution function of interest in physics. A few plots of some numerical results with respect to the energy are shown.

关键词： schr6dinger equation Hulthen plus Coulomb-like potential position-dependent mass distributionfunctions perpendicular magnetic and Aharonov-Bohm flux fields

Response of photosynthesis,growth,and acorn mass of pedunculate oak to diff erent levels of nitrogen in wet and dry growing seasons

在线全文

学校读者我要写书评

暂无评论

Journal of Forestry Research 2023年第1期34卷 167-176页

作者： Krunoslav sever saša Bogdan ŽeljkoŠkvorc Faculty of Forestry and Wood Technology University of ZagrebSvetošimunska 2510000 ZagrebCroatia

The objective was to examine the effects of optimal leaf nitrogen levels>2.0%and suboptimal levels<2.0%,nitrogen nutrition on net photo synthetic rate,stem diameter increment,height growth increment and acorn mass of ... 详细信息

The objective was to examine the effects of optimal leaf nitrogen levels>2.0%and suboptimal levelssynthetic rate,stem diameter increment,height growth increment and acorn mass of pedunculate oak during 2010 in the absence of drought stress and during 2011 under the impact of moderate drought *** to the results,moderate drought stress significantly reduced net photo synthetic rate,stem diameter increment and height growth increment,while acorn mass was not *** nitrogen nutrition significantly reduced the net photo synthetic rate and stem diameter increment only in the wet year,acorn mass in both wet and dry years,while height growth increment was not significantly reduced by suboptimal nitrogen nutrition in either *** results indicate that optimal nitrogen levels can stimulate photo synthetic rate and stem diameter increment of pedunculate oak only in the absence of moderate drought ***,the results show that moderate drought stress is a more dominant stressor for photosynthesis and growth of pedunculate oak than suboptimal nitrogen nutrition,while for acorn development,it is the more dominant stressor.

关键词： Quercus robur L. Drought stress Net photosynthic rate stem diameter increment Height growth increment Acorn mass

THE HADAMARD INEQUALITY FOR CONVEX FUNCTION VIA FRACTIONAL INTEGRALs

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica scientia 2013年第5期33卷 1293-1299页

作者： M.E.ZDEMR s.s.dragomir C.YILDIZ Department of Mathematics K.K.Education Faculty Atatürk University school of Engineering & science Victoria University

In this paper, we establish several inequalities for some differantiable mappings that are connected with the Riemann-Liouville fractional integrals. The analysis used in the proofs is fairly elementary.

关键词： Hadamard's inequality convex functions power-mean inequality Riemann-Liouville fractional integration

studies on Thermal Contraction of Crankshaft Bearings under Extreme Low Temperatures

在线全文

学校读者我要写书评

暂无评论

Journal of Thermal science 2015年第5期24卷 496-501页

作者： sever-Alexandru Haba Gheorghe Oancea Manufacturing Engineering Department Transilvania University of Brasov

This paper presents how the contractions of the main components of a V6 motor with low engine displacement are determined for the cold-start phase under extreme low temperature. Internal combustion engine components have complex geometries and to obtain the thermal contractions, in the research, used the method of finite element analysis. The phenomena of thermal contractions are studied for the cold-start situations at extreme low temperature, knowing that the cold-start phase of an internal combustion engine is the main factor that determines moving rotational and translational parts wear life. Checking the proper choice of clearance is particularly important, as the use of inappropriate values of it leads to rapid operation destruction of the engine group components. The results obtained for the thermal clearances of crankshaft bearings are mathematically modeled and the relations can be used for calculating the clearances. The mathematical models are also useful for implementing in different software tools.

关键词： Engine Engine block Crankshaft bearings Thermal contraction FEA

Optical metasurfaces: new generation building blocks for multi-functional optics

在线全文

学校读者我要写书评

暂无评论

Light(science & Applications) 2018年第1期7卷 495-499页

作者： dragomir Neshev Igor Aharonovich Nonlinear Physics Centre Research School of Physics and EngineeringAustralian National UniversityCanberraACT 2601Australia Institute of Biomedical Materials and Devices University of Technology SydneyUltimoNSW 2007Australia

Optical metasurfaces(OMs)have emerged as promising candidates to solve the bottleneck of bulky optical *** offer a fundamentally new method of light manipulation based on scattering from resonant nanostructures rather than conventional refraction and propagation,thus offering efficient phase,polarization,and emission *** perspective highlights state of the art OMs and provides a roadmap for future applications,including active generation,manipulation and detection of light for quantum technologies,holography and sensing.

关键词： surfaces optics resonant

Comparing solutions to the Nonlinear Dissipative Wave Equation

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 Applied Mathematics and Physics 2022年第4期10卷 1281-1296页

作者： Zaki Mrzog Alaofi Talaat sayed El-Danaf silvestru sever dragomir Department of Mathematics College of Science and Arts King Khalid University Muhayil Asir KSA Mathematics College of Engineering & Science Victoria University Melbourne Australia Department of Mathematics Faculty of Sciences and Arts Taibah University Medina KSA

In previous decades, many of the practical problems arising in scientific fields such as physics, engineering, and mathematics have been related to nonlinear fractional partial differential equations. One of these nonlinear partial differential equations, the dissipative wave equation, has been found to have a plethora of useful applications in different fields. A special class of solutions has been studied for the dissipative wave equation including exact solutions and approximate solutions. The aim of this article is to compare the non-polynomial spline method and the cubic B-spline method with the solution of a nonlinear dissipative wave equation. We will conduct a comparison of the stability of the two methods using the Von Neumann stability analysis. In addition, a numerical example will be presented to illustrate the accuracy of these methods.

关键词： Dissipative Wave Equation Cubic B-spline Non-Polynomial spline Truncation Error Von Neumann stability

signals from the interface:protein nanoclusters stabilize biomolecular condensates

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

signal Transduction and Targeted Therapy 2022年第2期7卷 341-342页

作者： Christian Hoffmann Branislava Rankovic dragomir Milovanovic Laboratory of Molecular Neuroscience German Center for Neurodegenerative Diseases(DZNE)10117 BerlinGermany

In a recent study,Folkmann and colleagues1 show that protein nanoclusters at the surface of biomolecular condensates act as Pickering agents stabilizing these emulsions in *** accumulating evidence suggests that cytosol represents a complex emulsion where multiple membrane-bound organelles and biomolecular condensates co-exist together.2 Each of these condensates is a crucible that can enrich for numerous proteins,RNAs,and even the entire membrane-bound organelles,such as the cluster of synaptic vesicles or the Golgi *** molecules in these condensates remain highly mobile,readily exchange with the surrounding environment and grow/coarsening over time(by coalescence or Ostwald ripening),often towards the round structures to minimize the surface tension.

关键词： clusters molecular readily

superstatistics of Modified Rosen-Morse Potential with Dirac Delta and Uniform Distributions

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2019年第10期71卷 1246-1252页

作者： U.s.Okorie A.N.Ikot G.J.Rampho R.sever Department of Physics AkwaIbom State UniversityIkotAkpadenUyo.Nigeria Department of Physics University of Port HarcourtChobaNigeria Department of Physics University of South AfricaFlorida Park1710South Africa Department of Physics Middle East Technical University06800AnkaraTurkey

We discuss the thermodynamic properties of a modified Rosen-Morse potential using the q-deformed superstatistics approaches. We obtain the partition function with the help of the generalized Boltzmann factor from the modified Dirac delta distribution and uniform distribution. Other thermodynamic function is obtained for the superstatistics of the two distributions considered. We also discuss our results graphically and obtain the ordinary statistical quantities when the deformation parameter tends to zero.

关键词： superstatistics partition function thermodynamic function