检索结果-南通市图书馆

Plant Leaf Diseases Classification Using Improved K-Means Clustering and SVM Algorithm for Segmentation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2023年第7期76卷 367-382页

作者： Mona Jamjoom Ahmed Elhadad Hussein Abulkasim safia abbas Department of Computer Sciences College of Computer and Information SciencesPrincess Nourah Bint Abdulrahman UniversityRiyadhSaudi Arabia Department of Computer Science Faculty of Computers and InformationSouth Valley UniversityQena83523Egypt Faculty of Science New Valley UniversityEl-Kharga72511Egypt Department of Computer Science Faculty of Computer and Information SciencesAin Shams UniversityCairo11566Egypt

Several pests feed on leaves,stems,bases,and the entire plant,causing plant *** a result,it is vital to identify and eliminate the disease before causing any damage to *** detecting plant disease and treating it is pretty challenging in this *** processing is employed to detect plant disease since it requires much effort and an extended processing *** main goal of this study is to discover the disease that affects the plants by creating an image processing system that can recognize and classify four different forms of plant diseases,including Phytophthora infestans,Fusarium graminearum,Puccinia graminis,tomato yellow leaf ***,this work uses the Support vector machine(SVM)classifier to detect and classify the plant disease using various steps like image acquisition,Pre-processing,Segmentation,feature extraction,and *** gray level co-occurrence matrix(GLCM)and the local binary pattern features(LBP)are used to identify the disease-affected portion of the plant *** to experimental data,the proposed technology can correctly detect and diagnose plant sickness with a 97.2 percent accuracy.

关键词： SVM machine learning GLCM algorithm K-means clustering LBP

Evolution of an Emerging Symmetric Quantum Cryptographic Algorithm

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 Information Security 2015年第2期6卷 82-91页

作者： Omer K. Jasim safia abbas El-Sayed M. Horbaty Abdel-Badeeh M. Salem Computer Science Al-Ma’arif College University Anbar Iraq Faculty of Computer and Information Sciences Ain Shams University Cairo Egypt

With the rapid evolution of data exchange in network environments, information security has been the most important process for data storage and communication. In order to provide such information security, the confidentiality, data integrity, and data origin authentication must be verified based on cryptographic encryption algorithms. This paper presents a new emerging trend of modern symmetric encryption algorithm by development of the advanced encryption standard (AES) algorithm. The new development focuses on the integration between Quantum Key Distribution (QKD) and an enhanced version of AES. A new quantum symmetric encryption algorithm, which is abbreviated as Quantum-AES (QAES), is the output of such integration. QAES depends on generation of dynamic quantum S-Boxes (DQS-Boxes) based quantum cipher key, instead of the ordinary used static S-Boxes. Furthermore, QAES exploits the specific selected secret key generated from the QKD cipher using two different modes (online and off-line).

关键词： AES Encryption/Decryption Quantum Computations QKD Symmetric Algorithm

Characters of Nummulites multiplicutiospiralis *** the Qarara Formation,Maghagha,Nile Valley,Egypt

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2021年第2期95卷 342-347页

作者： safia AL MENOUFY University of Ain Shams Faculty of EducationDepartment of Biological&Geological SciencesCairo11341Egypt

Nummulites multiplicutiospiralis *** described and illustrated for both generations from a claystone of Lutetian age in the Middle Eocene Qarara Formation,Maghagha,Nile valley,*** considered to be Nummulites gizehensis,we describe this form as a new species based on diameter of the test and protoconch sizes,septal shape and *** primary feature of this species is spiral multiplication,seen in spiral *** species is also characterized morphologically by lenticular to flat tests with rounded periphery,wrinkled to broadly meandering septal filaments and few granules on the periphery in microspheric *** granules are spirally arranged on the septal filaments in megalospheric *** are longer than high and the spire is *** new taxon belongs to the Nummulites partschi Group,Subgroup *** coiling in the spiral may develop through ontogeny as in ***,the species which was considered to be an index species in the southern Tethys(Boukhary et al.,1982 and Boukhary et al.2010).The characters of the new species,as well as its retrogenesis and reflexive coiling,should be further studied in general in Nummulites spp.,to understand the importance of such characters phylogenetically.

关键词： invertebrate paleontology foraminifera Nummulites Eocene Nile Valley Egypt

Magnetohydrodynamic peristaltic flow of a hyperbolic tangent fluid in a vertical asymmetric channel with heat transfer

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2011年第2期27卷 237-250页

作者： Sohail Nadeem safia Akram Department of Mathematics Quaid-i-Azam University 45320 Islamabad 44000 Pakistan Department of Electrical (Telecom) Engineering Military College of Signals National University of Sciences and Technology Rawalpindi 46000 Pakistan

In the present paper we discuss the magnetohydrodynamic （MHD） peristaltic flow of a hyperbolic tangent fluid model in a vertical asymmetric channel under a zero Reynolds number and long wavelength approximation. Exact solution of the temperature equation in the absence of dissipation term has been computed and the analytical ex- pression for stream function and axial pressure gradient are established. The flow is analyzed in a wave frame of reference moving with the velocity of wave. The expression for pressure rise has been computed numerically. The physical features of pertinent parameters are analyzed by plotting graphs and discussed in detail.

关键词： MHD flow Hyperbolic tangent fluid Vertical asymmetric channel Heat transfer

On the Validity and Evolution of Assilina Species during the Ypresian–Lutetian:Example from Bir Dakhl,Eastern Desert,Egypt

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2021年第4期95卷 1080-1085页

作者： safia AL MENOUFY Mohamed BOUKHARY University of Ain Shams Faculty of EducationDepartment of Biological&Geological SciencesCairo 11341Egypt Geology Department University of Ain ShamsFaculty of ScienceCairo 11566Egypt

The genus Assilina is a taxon within the Nummulitacea that appeared early in the Ypresian(Early Eocene)and continued until the end of the Lutetian(Middle Eocene).Thus,this taxon could be useful for the chronostratigraphy of this time *** Eocene rocks in southern Galala,Egypt are exposed at Bir *** section includes marl sediments with debris flow shallow-marine facies deposits laid down during early Eocene times and includes fossils of large foraminifera:Assilina placentula Deshayes,1838 and Nummulites burdigalensis de la Harpe,*** are systematically treated,described and *** burdigalensis belongs to the *** group,and Assilina placentula belongs to the group of Assilina *** assumption is based on qualitative morphology and quantitative *** species,together with Operculina libyca Schwager,1883,enable the assignment of the Bir Dakhl(D5-40 Section)to the Early Eocene,Ypresian(SBZ10 of Serra-Kiel et al.,1998)supporting an earlier opinion that Assilina placentula belongs to that zone in the calibrated larger foraminiferal biostratigraphic zonation.

关键词： foraminifera Assilina evolution Eocene Galala Egypt

Hybrid Effects of Thermal and Concentration Convection on Peristaltic Flow of Fourth Grade Nanofluids in an Inclined Tapered Channel: Applications of Double-Diffusivity

在线全文

学校读者我要写书评

暂无评论

Computer Modeling in Engineering & Sciences 2021年第6期127卷 901-922页

作者： safia Akram Alia Razia MCS National University of Sciences and TechnologyIslamabadPakistan

This article brings into focus the hybrid effects of thermal and concentration convection on peristaltic pumping of fourth grade nanofluids in an inclined tapered ***,the brief mathematical modelling of the fourth grade nanofluids is provided along with thermal and concentration *** Lubrication method is used to simplify the partial differential equations which are tremendously ***,analytical technique is applied to solve the differential equations that are strongly nonlinear in nature,and exact solutions of temperature,volume fraction of nanoparticles,and concentration are *** and graphical findings manifest the influence of various physical flow-quantity *** is observed that the nanoparticle fraction decreases because of the increasing values of Brownian motion parameter and Dufour parameter,whereas the behaviour of nanoparticle fraction is quite opposite for thermophoresis *** is also noted that the temperature profile decreases with increasing Brownian motion parameter values and rises with Dufour parameter ***,the concentration profile ascends with increasing thermophoresis parameter and Soret parameter values.

关键词： Nanofluids thermal and concentration convection peristaltic flow inclined tapered channel fourth grade fluid

Helicobacter pylori outer membrane protein Q genotypes and their susceptibility to antiadhesive phytotherapeutic agents

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 Integrative Medicine 2017年第5期15卷 398-406页

作者： Javed Yakoob Zaigham abbas Malik Hassan Mehmood Kanwal Tariq Saima Azhar Saleem safia Awan Abdul Malik Saeed Hamid Rustam Khan Wasim Jafri Department of Medicine Aga Khan UniversityKarachi 74800Pakistan Department of Biological Biomedical Sciences Aga Khan UniversityKarachi 74800Pakistan

OBJECTIVE： Helicobacter pylori is a Gram-negative organism. Its outer membrane protein Q（Hop Q） mediates host-pathogen interactions; Hop Q genotypes 1 and 2 are found associating with gastroduodenal pathologies. The authors measured the anti-adhesion effects of the extracts of Abelmoschus esculentus, Zingiber officinale, Trachyspermum ammi, Glycyrrhiza glabra, Curcuma longa and Capsicum annum against Hop Q genotypes and H. pylori cytotoxin-associated gene A（Cag A）.METHODS： DNA was extracted by polymerase chain reaction of the Hop Q genotypes（i.e., type 1, type 2 and Cag A） from 115 H. pylori strains. The effect of the extracts from selected dietary ingredients was determined using a gastric adenocarcinoma cell line and a quantitative DNA fragmentation assay. The anti-adhesive effect of these extracts on H. pylori was tested using an anti-adhesion ***： C. annum, C. longa and A. esculentus showed prominent anti-adhesion effects with resultant values of 17.3% ± 2.9%, 14.6% ± 3.7%, 13.8% ± 3.6%, respectively, against Hop Q type 1 and 13.1% ± 1.7%, 12.1% ± 2%, 11.1% ± 1.6%, respectively, against Hop Q type 2. C. longa（93%）, C. annum（89%） and A. esculentus（75%） had better anti-adhesive activity against H. pylori with Hop Q type 1 compared to Hop Q type 2 with respective values of 70%, 64% and 51%. Extracts of C. annum（14.7% ± 4.1%）, A. esculentus（12.3% ± 4.1%） and Z. officinale（8.4% ± 2.8%） had an anti-adhesion effect against Cag A-positive H. pylori strains compared to Cag A-negative strains.

关键词： outer membrane protein Q Helicobacter pylori anti-adhesion Abelmoschus esculentus Capsicum annum Curcuma Ionga

Evaluation of adsorption capacities of humic acids extracted from Algerian soil on polyaniline for application to remove pollutants such as Cd(Ⅱ), Zn(Ⅱ) and Ni(Ⅱ) and characterization with cavity microelectrode

在线全文

学校读者我要写书评

暂无评论

Journal of Environmental Sciences 2011年第7期23卷 1095-1103页

作者： Achour Terbouche Chafia Ait Ramdane-Terbouche Didier Hauchard safia Djebbar Center of Scientific Research and Technical in Physical and Chemical Analysis Laboratory of Hydrometallurgy and Molecular Inorganic Chemistry Faculty of Chemistry University of Sciences and Technology Houari Boumediene Sciences Chimiques de Rennes UMR CNRS 6226 Ecole Nationale Supe'rieure de Chimie de Rennes avenue du ge'ne'ral Leclerc Universite' Europe'enne de Bretagne 12 Avenue Janvier 35000 Rennes France

The adsorption capacities of new humic acids isolated from Yakouren forest （YHA） and Sahara （Tamenrasset： THA） soils （Algeria） and commercial humic acid （PFHA） on polyaniline emeraldine base （PEB） were studied at pH 6.6. Also the adsorption of heavy metals such as Cd 2＋ , Zn 2＋ and Ni 2＋ on humic acid-polyaniline systems （HA-PEB） was investigated at the same conditions. HA-PEB compounds were characterized by scanning electron microscopy （SEM）, infrared spectrometry and cavity microelectrode. In addition, batch adsorption and cavity microelectrode were used in the adsorption study of Cd 2＋ , Zn 2＋ and Ni 2＋ on HA-PEB. To develop biocaptors of polluting metals using a cavity microelectrode modified by HA-PEB systems, the adsorption kinetic and adsorption capacity were investigated. The SEM analysis showed that the presence of humic acid affected the PEB surface and caused the formation of a granular morphology. The maximum adsorption capacities （q max ） of PFHA, THA and YHA determined by adsorption isotherms were 91.31, 132.1 and 151.0 mg/g, respectively. Batch adsorption results showed that q max of Cd 2＋ , Zn 2＋ and Ni 2＋ on HA-PEB followed the order： THA-PEB YHA-PEB PFHA-PEB. The voltammograms obtained with HA-PEB modified cavity microelectrode showed the appearance of new redox couples reflecting the adsorption of HA on PEB. Metal-humic acid-polyaniline voltammograms were characterized by appearance of oxidation-reduction couples or reduction wave corresponding to metal. Finally, the result may be exploited to develop a biocaptor based on the cavity microelectrode amended by THA-PEB and YHA-PEB.

关键词： adsorption capacity forest and Sahara humic acids polyaniline heavy metal modified cavity microelectrode.

A New Hiatus within the Lutetian of the El Basatin Section,Gebel Mokattam, Egypt:Field and Sedimentological Observations, with Special Emphasis on Nummulites

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2019年第1期93卷 12-29页

作者： safia Menoufy Al RADWAN Abul-Nasr MARWA Askar University of Ain Shams Faculty of Education Department of Biological & Geological Sciences

The Eocene succession of the El Basatin Section in Gebel Mokattam, east of Cairo, consists, from base to top, of two main units; the Mokattam and Maadi Formations. The Mokattam Formation consists of two Members, the Building Stone Member and the Giushi Member. The Upper Building Stone Member yielded six species of Nummulites belonging to the Upper Lutetian. These species are: Nummulites farisi Hussein et al., 2004; Nummulites cf. praegizehensis Boukhary and Hussein-Kamel, 1993; Nummulites cf. gizehensis(Forsk?l, 1775); Nummulites discorbinus(Schlotheim 1820) and Arxina schwageri(Silvestri, 1928) emended by Boukhary et al. 2012 and Nummulites crassichordatus Boukhary et al., 2010. The Giushi Member yielded three species that indicate a Bartonian age. These species, which continued from their first appearance in the Upper Building Stone Members, are N. discorbinus, A. schwageri and N. crassichordatus. The Maadi Formation, which has been previously considered to be of Bartonian–Priabonian age, is devoid of fossils in the study section. The two members of the Mokattam Formation represent a carbonate platform facies. The deposition of the Upper Building Stone Member was disturbed during the Lutetian by slumping and a convolute-bedding interval, indicating a short hiatus. The subsequent regression resulted in a very shallow marine to near-shore facies in the above Maadi Formation.

关键词： Eocene Lutetian Nummulites Hiatus El Basatin Gebel Mokattam Egypt