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Numerical Computational Heuristic Through Morlet Wavelet Neural Network for Solving the Dynamics of Nonlinear SITR COVID-19

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Computer Modeling in Engineering & Sciences 2022年第5期131卷 763-785页

作者： Zulqurnain Sabir Abeer S.Alnahdi Mdi Begum Jeelani mohamed A.abdelkawy Muhammad Asif Zahoor Raja Dumitru Baleanu Muhammad Mubashar Hussain Department of Mathematics Hazara UniversityMansehraPakistan Department of Mathematics and Statistics Faculty of ScienceImam Mohammad Ibn Saud Islamic University(IMSIU)RiyadhSaudi Arabia Department of Mathematics Faculty of ScienceBeni-Suef UniversityBeni-SuefEgypt Future Technology Research Center National Yunlin University of Science and TechnologyYunlinTaiwan Department of Mathematics Cankaya UniversityAnkaraTurkey Institute of Space Sciences Magurele-BucharestRomania Department of Mathematics University of PunjabJhelum CampusJhelumPakistan

The present investigations are associated with designing Morlet wavelet neural network(MWNN)for solving a class of susceptible,infected,treatment and recovered(SITR)fractal systems of COVID-19 propagation and *** structure of an error function is accessible using the SITR differential form and its initial *** optimization is performed using the MWNN together with the global as well as local search heuristics of genetic algorithm(GA)and active-set algorithm(ASA),i.e.,*** detail of each class of the SITR nonlinear COVID-19 system is also *** obtained outcomes of the SITR system are compared with the Runge-Kutta results to check the perfection of the designed *** statistical analysis is performed using different measures for 30 independent runs as well as 15 variables to authenticate the consistency of the proposed *** plots of the absolute error,convergence analysis,histogram,performancemeasures,and boxplots are also provided to find the exactness,dependability and stability of the MWNN-GA-ASA.

关键词： Nonlinear SITR model morlet function artificial neural networks Runge-Kutta treatment genetic algorithm treatment active-set

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添加晶粒细化剂硅对Ti-6Al-4V合金组织和性能的影响(英文)

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Transactions of Nonferrous Metals Society of China 2013年第7期23卷 1863-1874页

作者： Khaled M.IBRAHIM Abdel Hamied HUSSEIN mohamed abdelkawy Central Metallurgical R&D Institute CMRDICairoEgypt Cairo University GizaEgypt

采用真空感应凝壳熔炼工艺在石墨模中制备Ti-6Al-4V和Ti6Al4V0.5Si两种钛合金。将硅作为一种晶粒细化剂加入到Ti-6Al-4V合金中,考察添加硅对铸态和模锻态Ti-6Al-4V合金组织和性能的影响。铸态合金先在900°C下进行热模锻处理,然后分别... 详细信息

采用真空感应凝壳熔炼工艺在石墨模中制备Ti-6Al-4V和Ti6Al4V0.5Si两种钛合金。将硅作为一种晶粒细化剂加入到Ti-6Al-4V合金中,考察添加硅对铸态和模锻态Ti-6Al-4V合金组织和性能的影响。铸态合金先在900°C下进行热模锻处理,然后分别进行两种不同的热处理。一种是将模锻样品在1050°C下保温30min,然后水淬以获得细小的层片状组织;另一种是将模锻件在1050°C下保温30min,然后再在800°C下保温30min,以获得粗大的层片状组织。Ti6-Al-4V合金中添加0.5%Si后,铸态合金的晶粒尺寸从627μm减小到337μm,其极限抗拉强度增加约25MPa。具有细小、层片状组织的Ti-6Al-4V0.5Si合金的最大极限抗拉强度为1380MPa,在Hank溶液和NaCl溶液中的腐蚀速度分别为1.35×106和5.78×104mm/a。Ti-6Al-4V合金中添加0.5%Si后,在低滑动速度下的磨损率降低50%,在高滑动速度下的磨损率降低约73%。

关键词： Ti-6Al-4V合金硅铸造晶粒细化热处理磨损添加晶粒细化剂硅对Ti6Al4V合金组织和性能的影响

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Validated stability indicating methods for determination of nitazoxanide in presence of its degradation products

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Journal of Pharmaceutical Analysis 2012年第2期2卷 105-116页

作者： Nouruddin W.Ali Samah Sayed Abbas Hala El-Sayed Zaazaa Maha mohamed Abdelrahman mohamed abdelkawy Analytical Chemistry Department Faculty of PharmacyBeni-Suef UniversityHussin El-Shafey StreetBeni-Suef CityEgypt Analytical Chemistry Department Faculty of PharmacyCairo UniversityKasr El-Aini Street11562CairoEgypt

Three sensitive,selective and reproducible stability-indicating methods are presented for determination of nitazoxanide (NTZ),a new anti-protozoal drug,in presence of its degradation *** A utilizes the first derivative of ratio spectra spectrophotometry by measurement of the amplitude at 364.4 nm using one of the degradation products as a *** B is a chemometric-assisted spectrophotometry,where principal component regression (PCR) and partial least squares (PLS) were *** two approaches were successfully applied to quantify NTZ in presence of degradation products using the information included in the absorption spectra in the range 260-360 *** C is based on the separation of NTZ from its degradation products followed by densitometric measurement of the bands at 254 *** separation was carried out on silica gel 60F 254,using chloroform-methanol-ammonia solution-glacial acetic acid (95:5:1:1 by volume,pH=5.80) as a developing *** methods are suitable as stability-indicating methods for the determination of NTZ in presence of its degradation products either in bulk powder or in pharmaceutical *** analysis of the results has been carried out revealing high accuracy and good precision.

关键词： Nitazoxanide Degradation Derivative spectrophotometry Chemometrics TLC-densitometry Stability-indicating methods

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新型液相色谱-荧光检测法测定药物剂型和人血浆中的他达拉非和盐酸达泊西汀(英文)

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色谱 2015年第7期33卷 765-770页

作者： MAHA Hegazy AMIRA Kessiba mohamed abdelkawy AHMED EMAD El Gindy Analytical Chemistry Department Faculty of PharmacyCairo University Pharmaceutical Chemistry Department Faculty of PharmacyMisr International University Pharmaceutical Chemistry Department Faculty of PharmacyFuture University

Tadalafil(TAD)and dapoxetine HCl(DAP)are recently co-formulated and both show native ***,a novel,accurate,specific and sensitive reversed-phase high performance liquid chromatographic method with fluorescence detection was developed and validated for their separation and quantitation in dosage form and human plasma using avanafil as an internal standard(IS).Separation was achieved using isocratic elution within 7.0 min on C18column and acetonitrile-0.15%triethylamine(40∶60,v/v;pH 4)as a mobile *** flow rate was 1.0 mL/min and the detection was time-programmed at 330,410 and 370 nm for TAD,DAP and IS,respectively,after excitation at 236 *** linear ranges from 0.01 to 30.00μg/mL for each drug with the limits of detection of 4.20 and 7.20 ng/mL for TAD and DAP,*** method was validated in accordance to the International Conference on Harmonization(ICH)guidelines and was successfully applied to spiked human plasma with mean recoveries of 98.17%and 98.83%for TAD and DAP respectively.

关键词： high performance liquid chromatography(HPLC) fluorescence detection tadalafil(TAD) dapoxetine HCl(DAP) dosage form human plasma

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