检索结果-南通市图书馆

Restricted Three-Body Problem in Cylindrica. Coordina.es System

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

a.plied Ma.hema.ics 2012年第8期3卷 907-909页

作者： Moha.med Sha.a. aisha alshaery Depa.tment of a.tronomy Faculty of Science King Abdul Aziz University Jeddah Saudi Arabia Depa.tment of Ma.hema.ics Faculty of Science King Abdul Aziz University Jeddah Saudi Arabia

In this pa.er, the equa.ions of motion for spa.ia. restricted circula. three body problem will be esta.lished using the cylindrica. coordina.es. Initia. va.ue procedure tha. ca. be used to compute both the cylindrica.... 详细信息

关键词： Spa.ia. Restricted Circula. Three Body Problem Regula.iza.ion

a.Series Solution a.proa.h to the Circula. Restricted Gra.ita.iona. Three-Body Dyna.ica. Problem

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journa. of a.plied Ma.hema.ics a.d Physics 2020年第12期8卷 2703-2712页

作者： Ma.a.Ha.ed a.gha.di aisha a.du alshaery Depa.tment of Ma.hema.ics Faculty of Science University of Jeddah Jeddah KSA

The present ma.uscript exa.ines the circula. restricted gra.ita.iona. three-body problem (CRGTBP) by the introduction of a.new a.proa.h through the power series method. In a.dition, certa.n computa.iona. a.gorithms with the a.d of Ma.hema.ica.softwa.e a.e specifica.ly designed for the problem. The a.gorithms or ra.her ma.hema.ica. modules a.e esta.lished to determine the velocity a.d position of the third body’s motion. In fa.t, the modules led to a.cura.e results a.d thus proved the new a.proa.h to be efficient.

关键词： n-Body Problems Restricted Gra.ita.iona. Problems Power Series Method Series Solution a.proa.h

Electron-Positron Pa.r Production in Electro-Ma.netic Field

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journa. of a.plied Ma.hema.ics a.d Physics 2022年第2期10卷 237-244页

作者： Sa.a. a. a.kha.eeb aisha a.du alshaery Ra.a. a.i a.dosa.y Ma.hema.ics Depa.tment Faculty of Science University of Jeddah Jeddah Saudi Arabia

a. very high energies, pa.r production forma.ion (γ + N → e+e-) exhibits a.va.iety of intriguing properties. a.a.ytica.ly a.d qua.tita.ively, the forma.ion of Electron-Positron pa.rs in the Electro-Ma.netic field of light nuclei ha. been ca.cula.ed. In Ultra.Rela.ivistic (UR) a.ea. of incident photon energy, a.plying the resulting formula. to the energy distribution of the (e-, e+) opera.ion. When we compa.e the results, we ca. observe tha. the Ma.netic field of the ta.get nucleus is more effica.ious tha. the Electric field of the nucleus in the (e-, e+) opera.ion. Furthermore, we ca. show tha. in Pa.r Production opera.ion, the Differentia. Cross Section (DCS) owing to the ta.get nucleus’s Electric Qua.rupole (EQ) a.d Ma.netic Octupole (MO) a.e bigger tha. the Differentia. Cross Section (DCS) a.tributa.le to the ta.get nucleus’s Electric Cha.ge (EC) distribution a.d Ma.netic Dipole (MD).

关键词： Pa.r Production Positron Differentia. Cross Section The Bethe-Hitler Equa.ion

Two Pa.a.eters a.a.ytica. Solution for the Stella. Density in Globula. Clusters

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Interna.iona. Journa. of a.tronomy a.d a.trophysics 2012年第1期2卷 19-22页

作者： Moha.ed a. Sha.a. a.r a. Sha.a. aisha a.du Hussien alshaery a.tronomy Depa.tment Faculty of Science King Abdul Aziz University Jeddah Saudi Arabia Depa.tment of Informa.ion Technology Faculty of Computing and Information Technology King Abdul Aziz University Jeddah Saudi Arabia Depa.tment of Ma.hema.ics College of Science for Girls King Abdulaziz University Jeddah Saudi Arabia

In this pa.er, two pa.a.eters a.a.ytica. solution will be esta.lished for the stella. density in globula. clusters. These two pa.a.eters ca. be obta.ned from sta. counts, a.d the solution could be used to fit a.y orde... 详细信息

关键词： Globula. Clusters Stella. Density Integra. Equa.ions Symbolic Representa.ions

Two Unified a.gorithms for Funda.enta. Pla.eta.y Ephemeris

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Interna.iona. Journa. of a.tronomy a.d a.trophysics 2014年第4期4卷 598-606页

作者： Moha.ed a.el Sha.a. a.del-Na.y Sa.d Sa.d aisha a.du alshaery Depa.tment of a.tronomy Faculty of Science King Abdulaziz University Jeddah KSA Depa.tment of a.tronomy National Research Institute of Astronomy and Geophysics Cairo Egypt Depa.tment of Ma.hema.ics Preparatory Year Qassim University Buraidah KSA Depa.tment of Ma.hema.ics College of Science for Girls King Abdulaziz University Jeddah KSA

In the present pa.er, we esta.lished two unified a.gorithms. The first a.gorithm is for the tra.sforma.ions between J2000.0 Kepleria. orbita. elements a.d B1950.0 elements, while the second is for the tra.sforma.ions between the equa.oria. orbita. elements a.d the ecliptic orbita. elements. Ma.hema.ica.Modules of the a.gorithms a.e given together with some numerica. a.plica.ions.

关键词： Spherica. a.tronomy Precession Ephemeris Orbit Determina.ion

Surfa.e Photometry a.d Dyna.ica. Properties of Lenticula. Ga.a.ies: NGC3245 a. Ca.e Study

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Interna.iona. Journa. of a.tronomy a.d a.trophysics 2012年第1期2卷 39-51页

作者： Moha.ed a.el Sha.a. K. Ma.moud E. a.y a. a. alshaery a.tronomy Depa.tment Faculty of Science King Abdul Aziz University Jeddah Saudi Arabia a.tronomy Space Science Meteorology Department Faculty of Science Cairo University Giza Egypt Ma.hema.ics Depa.tment College of Science for Girls King Abdul Aziz University Jeddah Saudi Arabia Physics Depa.tment National Research Center Giza Egypt

In this pa.er, surfa.e photometry a.d dyna.ica. properties of Lenticula. ga.a.ies will be developed a.d a.plied to NGC3245. In this respect, we esta.lished new rela.ion between the intensity distribution I a.d the semi-ma.or a.is a.Moreover, some ba.ic sta.istics of both independent a.d the dependent va.ia.les of the rela.ion a.e a.so given. In a.dition to the I(a. rela.ion , the Sérsic r1/n model is a.plied for the intensity profile I(r) resulting in a. estima.ion of the effective ra.ius, re, a.d the surfa.e brightness it encloses, μe. Both rela.ions (I(a. a.d I(r)) a.e a.cura.e a. judged by the precision criteria.which a.e: the proba.le errors for the coefficients , the estima.ed va.ia.ce of the fit a.d the Q va.ue (the squa.e dista.ce between the exa.t solution a.d the lea.t squa.e estima.ed solution) where a.l very sa.isfa.tory. Correla.ion coefficients between some pa.a.eters of the isophotes a.e a.so computed. Fina.ly a. exa.ples of a.plica.ions of surfa.e photometry we determined the dyna.ica. properties: ma.s, density, potentia. distributions, a. well a. distributions of esca.e a.d circula. speeds in terms of Sérsic model.

关键词： Surfa.e Photometry Dyna.ica. Ga.a.ies

Two Pa.a.eters a.a.ytica. Solution for the Stella. Density in Globula. Clusters

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Surfa.e Photometry a.d Dyna.ica. Properties of Lenticula. Ga.a.ies: NGC3245 a. Ca.e Study

Interna.iona. Journa. of a.tronomy a.d a.trophysics（天文学与天体物理学国际期刊） 2012年第1期

作者： Moha.ed a. Sha.a. a.r a. Sha.a. aisha a.du Hussien alshaery

来源：评论

学校读者我要写书评

暂无评论