000			02042cam a2200313 a 4500
003			EG-GiCUC
008			181126s2018 ua dh f m 000 0 eng d
040			_aEG-GiCUC _beng _cEG-GiCUC
041	0		_aeng
049			_aDeposite
097			_aPh.D
099			_aCai01.13.10.Ph.D.2018.Ah.O
100	0		_aAhmed Essam Hammad Haggag Ahmed
245	1	0	_aOptimaldesignof photoniccrystal fiberstructures and em-based systems using modified trust region optimization algorithms / _cAhmed Essam Hammad Haggag Ahmed ; Supervised Abdelkarim S. O. Hassan , Mohamed F. O. I. Hameed
246	1	5	_aالتصميم الأمثل لهياكل الألياف الضوئية البلورية والنظم الكهرومغناطيسية باستخدام طرق أمثلية معدلة تعتمد علي منطقة ثقة
260			_aCairo : _bAhmed Essam Hammad Haggag Ahmed , _c2018
300			_a127 P. : _bcharts , facsimiles ; _c30cm
502			_aThesis (Ph.D.) - Cairo University - Faculty of Engineering - Department of Mathematics and Physics
520			_aTwo modified derivative free trust region algorithms have been proposed. The first is an unconstrained trust region (UTR) algorithm, while the other is a constrained trust region (CTR) algorithm. Both algorithms use quadratic surrogate models as a function approximation. The accuracy of the two modified algorithms is measured by applying them to some bench-mark and test functions. The CTR is used to obtain an optimal design for a photonic crystal fiber (PCF) polarization rotator. Further, the UTR algorithm has been employed in the optimization of the PCF dispersion and some practical polarization devices for the (PCFs) and EM-based systems
530			_aIssued also as CD
653		4	_aBox constrained optimization
653		4	_aDesign centering
653		4	_aTrust region
700	0		_aAbdelkarim S. O. Hassan , _eSupervisor
700	0		_aMohamed F. O. I. Hameed , _eSupervisor
905			_aNazla _eRevisor
905			_aShimaa _eCataloger
942			_2ddc _cTH
999			_c68746 _d68746