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A Lightweight Approach for Skin Lesion Detection Through Optimal Features Fusion

Computers, Materials & Continua 2022年第1期70卷 1617-1630页

作者： Khadija Manzoor Fiaz Majeed Ansar Siddique Talha Meraj Hafiz Tayyab Rauf Mohammed a.el-Meligy Mohamed Sharaf Abd elatty E.Abd elgawad Department of Information Technology University of GujratGujrat50700Pakistan Department of Software Engineering University of GujratGujrat50700Pakistan Department of Computer Science COMSATS University Islamabad-Wah CampusWah Cantt47040Pakistan Centre for Smart Systems AI and CybersecurityStaffordshire UniversityStoke-on-TrentUK Advanced Manufacturing Institute King Saud UniversityRiyadh11421Saudi Arabia Department of Industrial Engineering College of EngineeringKing Saud UniversityRiyadh11421Saudi Arabia

Skin diseases effectively influence all parts of *** and accurate detection of skin cancer is necessary to avoid significant *** manual detection of skin diseases by dermatologists leads to misclassification due to the same intensity and color ***,an automated system to identify these skin diseases is *** studies on skin disease classification using different techniques have been ***,previous techniques failed to identify multi-class skin disease images due to their similar *** the proposed study,a computer-aided framework for automatic skin disease detection is *** the proposed research,we collected and normalized the datasets from two databases(ISIC archive,Mendeley)based on six Basal Cell Carcinoma(BCC),Actinic Keratosis(AK),Seborrheic Keratosis(SK),Nevus(N),Squamous Cell Carcinoma(SCC),and Melanoma(M)common skin ***,segmentation is performed using deep Convolutional Neural Networks(CNN).Furthermore,three types of features are extracted from segmented skin lesions:ABCD rule,GLCM,and in-depth *** transfer learning is used for deep feature extraction,while a support vector machine(SVM)is used for *** results show that SVM outperformed other studies in terms of accuracy,as AK disease achieved 100%accuracy,BCC 92.7%,M 95.1%,N 97.8%,SK 93.1%,SCC 91.4%with a global accuracy of 95.4%.

关键词： AlexNet CNN GLCM SVMs skin disease

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Structural and AC electrical properties study of solid metal urea complexes

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Journal of Advanced Dielectrics 2018年第2期8卷 60-66页

作者： Ragab Mahani Saleh D.Mekky Badr a.el Sayed Gamal S.el-Bahy Azza Ward Microwave Physics and Dielectrics Department National Research Centre 33 EL Bohouth St.(former EL Tahrir St.)Giza-Egypt-P.O.12622 Chemistry Department Faculty of ScienceAlazhar University Nasr CityCairoEgypt Spectroscopy Department National Research Centre 33 EL Bohouth St.(former EL Tahrir St.)Giza-Egypt-P.O.12622

The complexation of solid urea with(Co^(2+)),(Cu^(2+))or(Ni^(2+))ions has been studied by using dielectric spectroscopy technique over a wide frequency range at different temper ***'structure were investigated by XRD,FTIR and FT-Raman *** and Raman analy sis indicated that the urea coordinates with the metal atoms through the same oxygen-metal bond(O-M).Furthermore,XRD analysis showed that the samples have polycrystalline structure with single *** pemittivity of complexes was found at much higher values than that of the ligand(pure urea),showing structure ***,two relaxation peaks were observed in the dielectric loss spectra corresponding to the orientation po larization of urea molecule,and some parts of urea molecule may be NH2 *** relaxation peaks correspond to thermally activated because they were shifted to higher frequency with the temperature *** peak position for the low frequency relaxation peak was observed lht the same relaxation time(τ=7.6× 10^(-4) s),corresponding to the coordination mode through the same O-M *** of this work is the successful finding of the relationship between the crystalline phase,coordination mode and the dy namic molecular behavior of solid urea and its complexes using the dielectric spec-troscopy techn ique.

关键词： Urea complexes IR XRD permitivity

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Effect of Molybdate Ions on the Corrosion Behaviour of Ti Alloys

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Journal of Materials Science & Technology 2000年第1期16卷 45-49页

作者： Magda.M.A.Gad, Kamal.E.Mohamed and Abdelwahab a.el-Sayed (Metallurgy Dept., Materials Division, Atomic Energy Authority, Cairo, Egypt) Metallurgy Dept. Materials Division Atomic Energy Authority Cairo Egypt

Titanium alloys are extensively used in power, chemical and petroleum industries as constructional materials for vessels and heat transfer tubes. Moreover they are candidate materials for nuclear waste disposal. These alloys have superior resistance to localized forms of corrosion compared to stainless steels and Ni-base alloys. However, this resistance is not as remarkable in crevice corrosion conditions in some aggressive media. electrochemical corrosion tests were conducted on two ASTM Ti grades na.ely, Ti-2 and Ti-12 in extremely low pH acidic environment. Results indicated that Ti-2 has less resistance to both general and crevice corrosion attack than Ti-12. Both alloys possess better resistance to general corrosion than to crevice corrosion. Also, results showed that the molybdate addition improves remarkably the resistance of Ti-2 to both types of attack. The increase of molybdate ions concentration from 0.03 mol/L to 0.15 mol/L made Ti-2 to be as resistant as, or somewhat higher than, Ti-12. The elecrochemical findings were further supplemented by optical examination of the corroded surface.

关键词： Ti Mo Effect of Molybdate Ions on the Corrosion Behaviour of Ti Alloys

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Privacy Regulation,Spatial Culture,and Communities in a Communally Diverse City:Ghadames,Libya

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Journal of World Architecture 2018年第1期2卷 16-25页

作者： Farag a.el-Agouri Vail Karakale Department of Architecture and City Planning Benghazi UniversityBenghaziLibya Department of Civil Engineering Faculty of EngineeringMarmara UniversityGoztepe KampusuKadikoyIstanbul 34722Turkey

Space syntax,the analytical tool of this study,is a set of techniques for representation and quantification of spatial patterns of *** this paper,quantitative analysis is performed to observe the relationship between privacy as cultural specific and the spatial configuration of the settlement in the city of *** analysis is conducted on two levels of *** of the whole Ghadames including three unconventional axial maps representing ground floor(male domain),upper floor(female domain),and the whole spatial system with entrances of buildings *** second level of analysis covers nine sites representing three different cultural communities within Ghadames(Arab,Barbar,and Tuarg).These community areas are analyzed as embedded within the city(embedded model)and as separated(cut out model).Analysis results indicate that ground floor(male domain)seems to be more locally and globally integrated than that of upper floor(female domain).Moreover,spaces of the ground floor are more visually connected than the upper floor,which reveals that greater possibility in route choice for the users of ground *** movement from one place to another is less restricted than that of the female in the upper ***,the results show that mechanisms are the physical elements that facilitate or impede privacy regulation in the city and/or enable users themselves to regulate privacy through their own locales.

关键词： space syntax privacy regulation visibility analysis traditional cities spatial configuration isovist analysis Published date:

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橄榄渣基活性炭活化工艺的优化（英文）

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新型炭材料 2016年第5期31卷 492-500页

作者： Nour T.Abdel-Ghani Ghadir a.el-Chaghaby Mohamed H.elGammal el-Shaimaa A.Rawash Chemistry Department Faculty of ScienceCairo University RCFF Agriculture Research Center

采用KOH对橄榄渣进行活化得到活性炭。设计2~3正交试验来优化制备工艺条件,水平和因子包括活化温度(600,900℃)、活化时间(1,3 h)和浸渍比(1∶2,1∶4)。活性炭的比表面积作为优化的评价指标。通过氮吸附仪、红外光谱仪和扫描电镜等手段... 详细信息

采用KOH对橄榄渣进行活化得到活性炭。设计2~3正交试验来优化制备工艺条件,水平和因子包括活化温度(600,900℃)、活化时间(1,3 h)和浸渍比(1∶2,1∶4)。活性炭的比表面积作为优化的评价指标。通过氮吸附仪、红外光谱仪和扫描电镜等手段对活性炭的表面化学和孔结构进行表征。结果表明,所有因子及其交互水平都非常显著(p<0.05)。活性炭的比表面积和制备条件的相关系数为99.2%。在最条件下制备的活性炭,比表面积为672 m^2/g、平均孔径为2.05 nm,微孔和介孔率分别为81.36%和18.37%。

关键词：橄榄渣活性炭 KOH 渴望函数孔隙率

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EVALUATION OF SAMAAR MORR (JUNCUS ACUTUS) PLANT AS RAW MATERIAL FOR PAPER MAKING

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天津科技大学学报 2004年第A2期19卷 1-8页

作者： Essam S. a.el-Sayed Researcher National Research Center Cellulose & Paper Dept. Tahrir Street-Dokki 12311-Cairo Egypt

The potential use of Samaar Morr (JUNCUS ACUTUS) plant as fibrous material in papermaking was evaluated in this study. The chemical analysis and fibre charactersitcs of this plant were determined for better understanding its behaviour in papermaking. Samaar morr stalks were subjected to sulfur-free three-stage (peroxyformic acid, formic acid, peroxyformic acid) Milox process. Some conventional pulping experiments such as soda, soda-anthraquinon (S-AQ), kraft and kraft-AQ pulping in addition to two- and one-stage peroxyformic acid pulping were also carried out for comparison with the three-stage peroxyformic acid pulping method. It was found that the pulping with Milox process produces pulp with good properties compared to the pulp produced from the other methods. The physical and optical properties of different pulps were also examined. The behaviour of Milox samaar morr pulp towards bleaching with alkaline hydrogen peroxide has been investigated in presence and absence of formic acid. The results showed that the final brightness about 81.5% ISO could be achieved after 3% peroxide in two bleaching steps with formic acid treatment between the two steps.

关键词：造纸工业纤维材料制浆过氧蚁酸木素纤维灯心草

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Finite Degree Holomorphic Covers of Compact Riemann Surfaces

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Acta Mathematica Sinica,English Series 2007年第1期23卷 89-94页

作者： jouni PARKKONEN Vesa RUUSKA Department of Mathematics and Statistics P.O.Box 35 40014 University of JyvskylFinland Department of Physics P.O.Box 3540014 University of JyvskylFinland

A conjecture of Ehrenpreis states that any two compact Riemann surfaces of genus at least two have finite degree unbranched holomorphic covers that are arbitrarily close to each other in moduli space. Here we prove a weaker result where certain branched covers associated with arithmetic Riemann surfaces are allowed, and investigate the connection of our result with the original conjecture.

关键词： Riemann surfaces covering maps quasiconformal maps

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On the cratonization of the Arabian-Nubian Shield: Constraints from gneissic granitoids in south Eastern Desert, Egypt

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Geoscience Frontiers 2021年第4期12卷 215-243页

作者： Ali A.Khudeir Jean-Louis Paquette Kirsten Nicholson Åke Johansson Tyrone O.Rooney Sadiq Hamid Mohamed a.el-Fadly Loretta Corcoran Shawn J.Malone Mohamed Ali Abu el-Rus Geology Department Faculty of ScienceAssiut University71516Egypt UniversitéClermont Auvergne CNRSIRDOPGCLaboratoire Magmas et VolcansF-63000 Clermont-FerrandFrance Ball-State University Department of EnvironmentGeology and Natural Resources117 Fine Art BuildingMuncieIN 47306USA Department of Geosciences Swedish Museum of Natural HistoryBox 50007SE-10405 StockholmSweden Department of Earth and Environmental Sciences Michigan-State UniversityEast LansingMI 48824USA Notre Dame University Department of Civil and Environmental Engineering and Earth Sciences156 Fitzpatrick HallNotre DameIN 46556USA

The Shaitian granite complex(SGC)spans more than 80 Ma of crustal growth in the Arabian–Nubian Shield in southeast *** is a voluminous composite intrusion(60 km2)comprising a host tonalite massif intruded by subordinate dyke-like masses of trondhjemite,granodiorite and *** host tonalite,in turn,encloses several,fine-grained amphibolite enclaves.U-Pb zircon dating indicates a wide range of crystallization ages within the SGC(800±18Ma for tonalites;754±3.9 Ma for trondhjemite;738±3.8 Ma for granodiorite;and 717±3.2 Ma for monzogranite),suggesting crystallization of independent magma *** high positiveεNdi(+6–+8)indicate that the melting sources were dominated by juvenile material without any significant input from older *** of zircon saturation geothermometry indicates increasing temperatures during the generation of melts from 745±31℃ for tonalite to 810±25℃ for trondhjemite;840±10℃ for granodiorite;and 868±10℃ for *** pressure of partial melting is loosely constrained to be below the stability of residual garnet(3 kbar for the stability of residual amphibole as inferred from the significantly lower NbN and TaN compared with LREEN and the sub-chondrite Nb/Ta ratios exhibited by the granitic *** inverse relation between the generation temperatures and the ages estimates of the granitoid lithologies argue against a significant role of fractional *** major and trace element contents indicate the emplacement of the SGC within a subduction zone *** lacks distinctive features for melt derived from a subducted slab(*** Sr/Y and high(La/Yb)N ratios),and the relatively low MgO and Ni contents in all granite phases within the SGC suggest melting within the lower crust of an island arc overlying a *** melts produced during melting experiments indicates an amphibolite of basaltic composition is th

关键词： Arabian-Nubian Shield(ANS) Cratonization Fractional crystallization Partial melting Subduction zones Tonalite-Trondhjemite-granodiorite(TTG)

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Principles of organization and function of locomotor microcircuits in zebrafish

Principles of organization and function of locomotor microci...

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中国神经科学学会第十届全国学术会议

作者： a.el Manira Department of Neuroscience Karolinska Institutet

Motor behavior represents the overt expression of the processing in the brain.A salient feature of motor behavior is the orderly recruitment of motor pools and the coordination of their activity to produce movement with precise force,speed and *** spinal networks generate the basic locomotor pattern and also act as a processing interface to adjust their output in response to influences from the brain and sensory *** natural variability in the speed of locomotion requires an orderly recruitment of motoneurons from those innervating slow to those innervating fast muscle *** research aims at understanding the rule governing the recruitment of essential neuronal elements in the locomotor *** far,our analysis has focused on the output stage by describing the mechanisms dictating the threshold of recruitment of motoneurons and a class of excitatory interneurons during swimming in adult *** results show that motoneurons are organized in four pools with specific topographic locations and are incrementally recruited to produce swimming at different *** recruitment threshold is set by a combination of specific intrinsic properties of motoneurons and the strength of their synaptic currents,but does not rely on their input *** contrast to motoneurons,no topographic organization was apparent for the recruitment of excitatory interneurons at different swimming *** findings indicate that the locomotor networks are composed of ensembles of microcircuits that are recruited sequentially to cover the full range of swimming frequencies.

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Mesoporous silica anchored on reduced graphene oxide nanocomposite as anode for superior lithium-ion capacitor

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Rare Metals 2022年第2期41卷 368-377页

作者： Sherif a.el-Khodary Gokila Subburam Bo-Bo Zou Juan Wang Jing-Xia Qiu Xian-Hu Liu Dickon H.L.Ng Shuang Wang Jia-Biao Lian School of Energy and Power Engineering Institute for Energy ResearchJiangsu UniversityZhenjiang 212013China Building Physics and Environment Institute Housing and Building National Research Center(HBRC)Dokki 12311CairoEgypt School of Energy and Power Engineering Institute for Energy ResearchSchool of Chemistry and Chemical EngineeringJiangsu UniversityZhenjiang 212013China Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationZhengzhou UniversityZhengzhou 450002China Department of Physics The Chinese University of Hong KongShatinHong Kong 999077China School of Energy and Power Engineering Jiangsu UniversityZhenjiang 212013China

Mesoporous silica(mSiO_(2))has attracted great interest as anode for lithium-ion ***,the low intrinsic conductivity is a major challenge for its *** this study,a low-cost sol–gel method is employed to synthesize mesoporous silica anchored on graphene nanosheets(rGO)for lithium *** results exhibit that the nanocomposite(mSiO_(2)@rGO)with high surface area(616.45 m^(2)·g^(–1))has chemical coupling bonds(Si–O–C)between SiO2 and rGO species,which would be favorable for lithium storage upon synergistic ***,the mSiO_(2)@rGO exhibits a high specific capacity of 1119.6 mAh·g^(–1)at 0.1 A·g^(–1)with outstanding cycling stability(92.5%retention over 1400 cycles at 1.0 A·g^(–1)).

关键词： lithium cycling synergistic

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