检索结果-南通市图书馆

Journal of modern Power Systems and Clean Energy 2021年第2期9卷 384-394页

作者： rizk m.rizk-allah Aboul Ella Hassanien the Faculty of Engineering Menoufia UniversityShebin El-KomEgypt Scientific Research Group in Egypt CarioEgypt the Faculty of Computers and Artificial Intelligence Cairo UniversityCairoEgypt

Identifying the parameters of photovoltaic(PV)modules is significant for their design and *** of the instabilities in the weather action and land surface of the earth,which cause errors in measuring,a novel fuzzy representation-based PV module is formulated and *** this paper,a novel locomotion-based hybrid salp swarm algorithm(LHSSA)is presented to identify the parameters of PV modules accurately and *** the LHSSA,better leader salps based on particle swarm optimization(PSO)are incorporated to the traditional salp swarm algorithm(SSA)in a serialized scheme with the aim of providing more valuable information for the leader salps of the *** this integration,the proposed LHSSA can escape the local optima as well as guide the seeking process to attain the promising *** proposed LHSSA is investigated on different PV models,i.e.,single-diode(SD),double-diode(DD),and PV module in crisp and fuzzy *** comparing with different algorithms,the comprehensive results affirm that the LHSSA can achieve a highly competitive performance,especially on quality and reliability.

关键词： Salp swarm algorithm(SSA) particle swarm optimization(PSO) photovoltaic(PV)model hybridization

Visual performance after implantation of two types of phakic foldable intraocular lenses for correction of high myopia

在线全文

学校读者我要写书评

暂无评论

International Journal of Ophthalmology(English edition) 2019年第2期12卷 284-290页

作者： Islam m.rizk Abd-Almonem A.Al-hessy Sherief E.El-Khouly Ashraf m.Sewelam mansoura Ophthalmic Center Faculty of Medicine Mansoura University

AIm: To compare Visian lens(model V4 c) and Artiflex lens regarding quality(contrast sensitivity) and quantity(efficacy, predictability, safety and stability) of vision in correcting high myopia with recording and analysis of complications. mETHODS: The comparative prospective study included 39 eyes of 23 patients with high myopia, 19 eyes had Visian lens implantation(model V4 c) and 20 eyes had Artiflex lens implantation. The inclusion criteria were high myopia(higher than 6.0 D) and stable refraction(mes included assessment of safety and efficacy indices, predictability, stability, contrast sensitivity and analysis of complications at postoperative 1 d, 1 wk and 1, 3, 6 and 12 mo. Selection of the type of phakic intraocular lens for patients was based on surgeons' preferences, which was no specific selection criteria. RESULTS: After 12 mo of follow up, difference in uncorrected and corrected distant visual acuity(CDVA) between both groups was statistically insignificant(UDVA for VisianV4 c and Artiflex lens were 0.33±0.2 logmAR and 0.37±0.2 logmAR respectively, P=0.59, CDVA for VisianV4 c and Artiflex lens were 0.155±0.1 logmAR and 0.147± 0.1 logmAR respectively, P=0.87). The efficacy index was 1.25 for VisianV4 c lens and 0.8 for Artiflex lens, 78.9% of eyes were within one diopter spherical equivalent in Visian V4 c lens group compared to 70% in the Artiflex lens group. No eye lost lines of CVDA proving a good safety index for both lenses(safety index was 1.67 for VisianV4 c lens and 1.34 for Artiflex lens). Difference in contrast sensitivity between both groups was statistically insignificant(P=0.15, 0.88, 0.27, 0.32 and 0.82 at five spatial frequencies). CONCLUSION: Both Visian ICL V4 c and Artiflex lensesare safe and effective with stable and predictable refraction and they have comparable contrast sensitivity outcomes with no vision threatening complications.

关键词： phakic intraocular lenses implantable collamer Visian V4c lens foldable Artiflex lens

Plasma ignition threshold disparity between silver nanoparticle-based target and bulk silver target at different laser wavelengths

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Plasma Science and Technology 2019年第1期21卷 63-71页

作者： A m EL SHERBINI m m HAGRASS m R m.rizk E A EL-BADAWY Laboratory of Laser and New materials Faculty of Science Cairo University Faculty of Engineering Electrical Engineering Department Alexandria University

Plasma ignition threshold of nanoparticle-based and bulk silver targets was measured in air. The plasma was initiated by a Nd:YAG laser at wavelengths of 355, 532, and 1064 nm. The plasma ignition was monitored utilizing the prominent Ag I line at 546.5 nm. Lower ignition thresholds of the nanoparticle-based silver target were estimated at 0.4?±?0.02, 0.34?±?0.04, and 0.27?±?0.035 J cm^(-2) coupled with the different laser wavelengths, respectively. In contrast, the bulk silver target plasma exhibited an order of magnitude higher ignition threshold. A three orders of magnitude enhanced emission intensity from the nano-based target over the bulk target was achieved at lower levels of laser irradiation. A reduction of the thermal diffusion length of the nanosilver was assumed in order to theoretically predict this reduction in the plasma threshold. In addition, the effect of self-reversal on the resonance lines was taken into consideration.

关键词： NELIBS enhancement nanosilver laser plasma threshold

Development of new potentiometric sensors for the determination of proguanil hydrochloride in serum and urine

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2016年第6期27卷 857-863页

作者： Fatehy m.Abdel-Haleem mohamed Saad mohamed S.rizk Chemistry Department Faculty of Science Cairo University

Potentiometric electrodes were developed for the rapid determination of proguanil hydrochloride in pure samples, pharmaceutical preparations and spiked serum and urine samples using PVC membrane,screen printed（SPE）, coated wired（CWE）, carbon paste（CPE） and modified carbon paste（mCPE）electrodes based on the ion-exchanger of proguanil with phosphotungestic acid（Pr-PT） as a chemical modifier. The prepared electrodes showed Nernestian slopes of 59.7, 58.1, 58.5, 58.5 and 57.0 for the PVC,SPE, CWE, CPE and mCPE for the proguanil ions in a wide concentration range of 1.0 ＊ 10^-5–1.0 ＊ 10^-2mol L^-1 at 25°C with detection limits of 7.94 ＊ 10^-6, 1.0 ＊ 10^-5, 1.0 ＊ 10^-6, 7.07 ＊ 10^-6 and 2.5 ＊ 10^-6 mol L^-1, respectively. The prepared electrodes exhibited high proguanil selectivity in relation to several inorganic ions and sugars and they could be successfully utilized for its determination in pure solutions, pharmaceutical preparations and serum and urine samples using the direct potentiometry and standard addition methods with very good recovery values.

关键词： Proguanil hydrochloride PVC membrane electrode Carbon paste electrode Screen printed electrode mWCNTs Coated wire electrode

Separation of ^(152+154)Eu,^(90)Sr from radioactive waste effluent using liquid–liquid extraction by polyglycerol phthalate

在线全文

学校读者我要写书评

暂无评论

Nuclear Science and Techniques 2018年第6期29卷 76-84页

作者： m.F.Attallah S.E.rizk S.A.Shady Analytical Chemistry and Control Department Hot Laboratories Center Atomic Energy Authority of Egypt Chemistry of Nuclear Fuel Department Hot Laboratories Center Atomic Energy Authority of Egypt Technology of Nuclear Fuel Department Hot Laboratories Center Atomic Energy Authority of Egypt

A new polyglycerol phthalate extractant was prepared and characterized using Fourier transform infrared spectroscopy, proton nuclear magnetic resonance(~1H NmR) spectroscopy, and thermogravimetric analysis. A preliminary study of the extraction of long-lived(^(90) Sr and ^(152+154)Eu) and short-lived(^(90) Y) radionuclides by polyglycerol phthalate was performed. The influence of different diluents, concentration of the acid, type of acid, and various interfering ions was explored. The stripping of ^(152+154)Eu radionuclide was studied by using different acid solutions, and it was found that sulfuric acid was the ideal acid for this purpose. Furthermore,^(152+154)Eu was extracted from the fission products(^(90) Sr) and the extraction% of^(90) Sr was found to improve in the presence of interfering ions.

关键词：放射性核种抽取液体 Fourier 分离浪费光谱学 NmR

Oracle Inequality for Sparse Trace Regression models with Exponentialβ-mixing Errors

在线全文

学校读者我要写书评

暂无评论

Acta mathematica Sinica,English Series 2023年第10期39卷 2031-2053页

作者： Ling PENG Xiang Yong TAN Pei Wen XIAO Zeinab rizk Xiao Hui LIU School of Statistics and Data Science Jiangxi University of Finance and EconomicsNanchang 330013P.R.China Key Laboratory of Data Science in Finance and Economics Jiangxi University of Finance and EconomicsNanchang 330013P.R.China

In applications involving,e.g.,panel data,images,genomics microarrays,etc.,trace regression models are useful *** address the high-dimensional issue of these applications,it is common to assume some sparsity *** the case of the parameter matrix being simultaneously low rank and elements-wise sparse,we estimate the parameter matrix through the least-squares approach with the composite penalty combining the nuclear norm and the *** extend the existing analysis of the low-rank trace regression with *** to exponentialβ-mixing *** explicit convergence rate and the asymptotic properties of the proposed estimator are ***,as well as a real data application,are also carried out for illustration.

关键词： Trace regression model low-rank matrix oracle inequality exponentialβ-mixing errors

同方期刊数据库

Assessment of lnc RNA GAS5, lnc RNA HEIH, lnc RNA BISPR and its m RNA BST2 as serum innovative non-invasive biomarkers: Recent insights into Egyptian patients with hepatitis C virus type 4

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2020年第2期26卷 168-183页

作者： Nourhan m El Samaloty marwa I Shabayek Ramy S Ghait Shohda A El-maraghy Sherine m.rizk maha m El-Sawalhi Biochemistry Section PharmacologyToxicology and Biochemistry DepartmentFaculty of Pharmaceutical Sciences and Pharmaceutical IndustriesFuture UniversityCairo 11795Egypt Internal medicine Gastroenterology and Hepatology DepartmentFaculty of MedicineAin Shams UniversityCairo 11566Egypt Biochemistry Department Faculty of PharmacyCairo UniversityCairo 11562Egypt

BACKGROUND Hepatitis C virus(HCV)infection and its consequent complications are undeniably a public health burden worldwide,particularly in *** evidence suggests that many lncRNAs have relevant roles in viral infections and antiviral *** To investigate the expression profiles of circulating lncRNAGAS5,lncRNAHEIH,lncRNABISPR and mRNABST2 in naïve,treated and relapsed HCV Egyptian patients,to elucidate relation to HCV infection and their efficacy as innovative biomarkers for the diagnosis and prognosis of HCV *** One hundred and thirty HCV-infected Egyptian patients and 20 healthy controls were included in this *** lncRNAs and mRNABST2 were measured using quantitative real-time polymerase chain reaction(qRT-PCR).RESULTS Our results indicated that serum lncRNAGAS5 and LncRNABISPR were upregulated,whereas mRNA BST2 and LncRNA HEIH were downregulated in naïve *** contrast,HCV patients treated with sofosbuvir and simeprevir;with sofosbuvir and daclatasvir;or with sofosbuvir,daclatasvir and ribavirin exhibited lower levels of lncRNAGAS5 and lncRNABISPR with higher mRNABST2 compared to naïve ***,patients relapsed from sofosbuvir and simeprevir showed higher levels of these lncRNAs with lower mRNABST2 compared to treated ***5 and lncRNABISPR were positively correlated with viral load and ALT at PmRNABST2 was negatively correlated with viral load at Pment in HCV pathogenesis or antiviral response and highlights their promising roles in diagnosis and prognosis of HCV.

关键词： lncRNA GAS5 lncRNA BISPR mRNA BST2 lncRNA HEIH Hepatitis C Biomarkers

Exact solutions of stochastic fractional Korteweg de–Vries equation with conformable derivatives

维普期刊数据库评论

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 2020年第3期29卷 62-69页

作者： Hossam A.Ghany Abd-allah Hyder m Zakarya King Khalid University College of ScienceDepartment of MathematicsP.O.Box 900461413AbhaSaudi Arabia Department of Engineering mathematics and Physics Faculty of EngineeringAl-Azhar University11371CairoEgypt Department of mathematics Helwan UniversitySawah Street(11282)CairoEgypt Department of mathematics Faculty of ScienceAl-Azhar University71524AssiutEgypt

We deal with the Wick-type stochastic fractional Korteweg de–Vries(KdV) equation with conformable *** the aid of the Exp-function method, white noise theory, and Hermite transform, we produce a novel set of exact soliton and periodic wave solutions to the fractional KdV equation with conformable derivatives. With the help of inverse Hermite transform, we get stochastic soliton and periodic wave solutions of the Wick-type stochastic fractional KdV equation with conformable derivatives. Eventually, by an application example, we show how the stochastic solutions can be given as Brownian motion functional solutions.

关键词： Korteweg de–Vries(KdV)equation conformable derivative stochastic Brownian motion Expfunction method

Difference between papillary and follicular thyroid carcinoma outcomes:an experience from Egyptian institution

在线全文

学校读者我要写书评

暂无评论

Cancer Biology & medicine 2015年第1期12卷 53-59页

作者： Engy m.Aboelnaga Rehab allah Ahmed Clinical Oncology and Nuclear medicine Department Mansoura University Pathology Department Faculty of MedicineMansoura University

Objective： Differentiated thyroid carcinomas （DTCs） are classified into papillary thyroid carcinoma （PTC） and follicular thyroid carcinoma （FTC）. DTCs are analyzed as a single group in clinical studies that investigated the prognostic factors and prognosis of these malignancies. However, the biological behaviors of these carcinomas significantly differ. In the present study, we aimed to detect differences in the outcomes between PTC and FTC in mansoura University Hospital in Egypt. methods： A total of SS8 patients with histologically proven thyroid carcinomas from January 2003 to December 2012 were retrospectively enrolled. The clinical and pathological data of patients were reviewed. Results： Large primary tumor size, lymph node involvement, extrathyroid extension, and distant metastasis were significant poor prognostic factors for overall survival （OS） in old PTC patients. Cox hazard analysis showed that the patient＇s age, extra thyroid extension, and distant metastasis were the only independent prognostic factors. In FTC patients, only the distant metastasis and degree of tumor invasion were significant poor prognostic factors in OS univariate analysis. However, these factors were nonsignificant in multivariate analysis. The 10-year OS rates were 97% and 89% for PTC and FTC, respectively （P=0.003）. The 10-year disease-free survival （DFS） rates were 77.2% in PTC vs. 65% in FTC （P=0.179）. Conclusion： The significant prognostic factors vary between the two types of DTCs. Therefore, PTC and FTC patients need to be analyzed and reported independently. PTC survival is widely and significantly affected by age, extrathyroid extension, and distant metastasis. By contrast, these factors were nonsignificant in FTC, which showed poorer survival than PTC.

关键词： Thyroid cancer differentiated thyroid papillary follicular Egypt

Fractional Optimal Control of Navier-Stokes Equations

在线全文

学校读者我要写书评

暂无评论

Computers, materials & Continua 2020年第8期64卷 859-870页

作者： Abd-allah Hyder m.El-Badawy King Khalid University College of ScienceDepartment of MathematicsP.O.Box 900461413AbhaSaudi Arabia Department of Engineering mathematics and Physics Faculty of EngineeringAl-Azhar UniversityCairo11371Egypt mathematics Department Al-Azhar UniversityCairoEgypt

In this paper,the non-stationary incompressible fluid flows governed by the Navier-Stokes equations are studied in a bounded *** study focuses on the time-fractional Navier-Stokes equations in the optimal control subject,where the control is distributed within the domain and the time-fractional derivative is proposed as Riemann-Liouville *** addition,the control object is to minimize the quadratic cost *** using the Lax-milgram lemma with the assistance of the fixed-point theorem,we demonstrate the existence and uniqueness of the weak solution to this ***,for a quadratic cost functional subject to the time-fractional Navier-Stokes equations,we prove the existence and uniqueness of optimal ***,via the variational inequality upon introducing the adjoint linearized system,some inequalities and identities are given to guarantee the first-order necessary optimality conditions.A direct consequence of the results obtained here is that when a→1,the obtained results are valid for the classical optimal control of systems governed by the Navier-Stokes equations.

关键词： Optimal control lax-milgram lemma fixed point theorem navier-stokes equations