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Open Journal of Opti.i.ati.n 2024年第1期13卷 21-30页

作者： Mahmoud Khatab Mohamed El-Gamel ahmed i. Saleh Asmaa H. Rabi. Atallah El-Shenawy Department of Mathemati.s and Engi.eeri.g Physi.s Faculty of Engineering Mansoura University Mansoura Egypt Department of Computers and Control Faculty of Engineering Mansoura University Mansoura Egypt Department of Mathemati.s Faculty of Science New Mansoura University Mansoura Egypt

Grey Wolf Opti.i.ati.n (GWO) i. a nature-i.spi.ed metaheuri.ti. algori.hm that has gai.ed populari.y for solvi.g opti.i.ati.n problems. i. GWO, the success of the algori.hm heavi.y reli.s on the effi.i.nt updati.g of the agents’ posi.i.ns relati.e to the leader wolves. i. thi. paper, we provi.e a bri.f overvi.w of the Grey Wolf Opti.i.ati.n techni.ue and i.s si.ni.i.ance i. solvi.g complex opti.i.ati.n problems. Bui.di.g upon the foundati.n of GWO, we i.troduce a novel techni.ue for updati.g agents’ posi.i.ns, whi.h ai.s to enhance the algori.hm’s effecti.eness and effi.i.ncy. To evaluate the performance of our proposed approach, we conduct comprehensi.e experi.ents and compare the results wi.h the ori.i.al Grey Wolf Opti.i.ati.n techni.ue. Our comparati.e analysi. demonstrates that the proposed techni.ue achi.ves superi.r opti.i.ati.n outcomes. These fi.di.gs underscore the potenti.l of our approach i. addressi.g opti.i.ati.n challenges effecti.ely and effi.i.ntly, maki.g i. a valuable contri.uti.n to the fi.ld of opti.i.ati.n algori.hms.

关键词： Grey Wolf Opti.i.ati.n (GWO) Metaheuri.ti. Algori.hm Opti.i.ati.n Problems Agents’ Posi.i.ns Leader Wolves Opti.al Fi.ness Values Opti.i.ati.n Challenges

Explori.g Trees Di.ersi.y and Ecologi.al Value of Mountai. Forests i. the Blue Ni.e Regi.n of Sudan

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Open Journal of Ecology 2024年第3期14卷 245-256页

作者： Dafa-Alla M. Dafa-Alla Haytham H. Gi.reel ahmed A. H. Si.di. Yousi. E. Yagoub Hashi. A. Abdelkari. Khati. H.T. Saeed ahmed i. Abuelbashar Faculty of Forestry-Shambat University of Khartoum Khartoum Sudan Harvard Forest Harvard University Petersham MA USA Faculty of Forest Sci.nce and Wood Technology University of Gezira Wad-Medani Sudan Department of Forestry and Range Sci.nces Faculty of Natural Resources and Environmental Studies Alsalam University Alfula Sudan Forest Research and Gum Arabi. Centre Agricultural Research Corporation Khartoum-Soba Sudan

We carri.d out thi. research at Abu-Gaddaf Natural Forest Reserve (ANFR) whi.h i. located east of Blue Ni.e Ri.er, i. Blue Ni.e State, Sudan. i. ai.s at explori.g tree composi.i.n assessi.g thei. di.ersi.y i.di.es, and ecologi.al i.portance values. For survey of types and esti.ati.n of densi.y of tree speci.s i. the forest, we randomly di.tri.uted 97 ci.cular sample plots (0.1 hectare (ha)). i. each sample plot we i.enti.i.d all trees to the speci.s level, recorded thei. frequenci.s and computed speci.s di.ersi.y and i.portance value i.di.es (i.i.. A total of 13 tree speci.s, whi.h belong to 12 genera and ni.e fami.i.s, were i.enti.i.d i. the tree layer of the forest. Mean tree densi.y i. ANFR was 116 trees/ha, composed mai.ly of Boswelli. papyri.era (Del.) Hochst. (48), followed by Combretum hartmanni.nu (19) and Lannea fruti.osa (18). Fabaceae was the most common fami.y followed by Combretaceae and Malvaceae. B. papyri.era Deli.e Hochst was the most abundant whi.e Acaci. seyal was the least abundant speci.s. Speci.s ri.hness (R = 1.71), evenness (E = 0.69), domi.ance (0.24) i.di.es and Si.pson’s i.dex of Di.ersi.y (D' = 0.76) suggest a moderate di.ersi.y, moderate numbers of i.di.i.uals i. each speci.s and a moderate communi.y stabi.i.y. The research provi.es empi.i.al results on di.ersi.y and ecologi.al i.portance value of speci.s, si.ni.i.s the urgi.g need to safeguard threatened speci.s and to pri.ri.i.e them for conservati.n, as well as the need to promote management of abundant speci.s to provi.e multi.le forest ecosystem servi.es.

关键词： Tree Speci.s Di.ersi.y Dry-Land Forest Sudan

i.vesti.ati.n on the mechani.al properti.s of si.tered porous copper compacts

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Chi.a Parti.uology 2007年第6期5卷 391-394页

作者： Yasser M.Z. ahmed Mohamed i. Ri.d ahmed i. Zaky Mohammed Abdel-Azi. Mohamed M.H. Shalabi Central Metallurgi.al Research and Development i.sti.ute CMRDI El-Felzat Street El-Tabbin P.O. Box 87 Helwan Cairo Egypt

i. li.e wi.h recent attenti.n on porous metals havi.g low and medi.m porosi.i.s i. the range of 20-50%, thi. paper studi.s the effect of porosi.y on the mechani.al properti.s of si.tered copper compacts. Experi.ents were desi.ned to i.vesti.ate the effect of porosi.y, appli.d stress and sli.i.g veloci.y on the wear rate of copper compacts, leadi.g to the fi.di.g that the effects of both porosi.y and appli.d stress of the wear test on the wear rate are approxi.ately si.i.ar and hi.her than that of sli.i.g veloci.y. The i.vesti.ati.n concerni.g the effect of porosi.y on compressi.e strength i.di.ated that the stress-strai. curve of hi.h-porosi.y compact exhi.i.ed i.enti.i.ble ulti.ate strength poi.ts, though low-porosi.y compact showed di.ti.ct stages of elasti. plasti. behavi.r.

关键词： Porous copper Wear rate Compressi.e strength Experi.ental desi.n techni.ue

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Fabri.ati.n of Semi.onductor Polymer Membranes Combi.ed wi.h a Colored Charge Transfer Complexes Used i. the Manufacture of Solar Cells as a Source of Alternati.e Energy

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光谱学与光谱分析 2019年第7期39卷 2307-2315页

作者： ahmed. i. El-Shenawy i.haq. F. E. ahmed Moamen. S. Refat Department of Chemi.try Colloge of EducationImam Abdulrahman Bin Faisal University

The mai. task of thi. arti.le was to prepared of new pi.ment model i. si.u solar cells accordance to charge-transfer complexes of rhodami.e C(RhC) donor as dye laser gai. medi. wi.h i.di.e(σ-acceptor) and chlorani.i. aci., CLA(π-acceptor). The synthesi. stoi.hi.metry of these complexes were of 1∶2(donor∶acceptor) wi.h general formulas [(RhC)]i.i. and [(RhC)(CLA)2]. The di.cussed data of elemental analysi., conducti.i.y measurements, FT-i., UV-Vi. spectroscopy and photometri. ti.rati.n data vi.uali.ed the stoi.hi.metry, formula and complexi.y of the complexes. The physi.ochemi.al and spectroscopi. analyses obtai.ed suggested that the electron transfer occurred through ni.rogen atom i. a terti.ry ami.e —N(C2H5)2 of RhC donor wi.h acceptor. The synthesi.ed soli. complexes were under go to thermogravi.etri. analyses to i.vesti.ate thei. thermal stabi.i.y and decomposi.i.n steps. The molar conductance measurements revealed that RhC complexes have an electrolyti. statement. The thermal stabi.i.y of rhodami.e C complexes was enhanced i. comparable wi.h RhC i.self. The polymer membranes of poly-methyl methacrylate)(PMMA) combi.ed wi.h the RhC charge(transfer complexes i. chloroform solvent have been prepared and characteri.ed by(i.frared & electroni.) spectroscopy and scanni.g electron mi.roscopy(SEM) morphologi.al exami.ati.n. The photo-stabi.i.y properti.s of the RhC complexes have been i.vesti.ated.

关键词： Charge-transfer Rhodami.e C Photostabi.i.y Complexi.y Spectroscopi. Polymer Dye

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Effecti.eness of external prestressi.g i. enhanci.g the non-ducti.e hanger fai.ure mechani.m i. rei.forced concrete i.verted T-beams

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Fronti.rs of Structural and Ci.i. Engi.eeri.g 2024年第7期18卷 1050-1065页

作者： ahmed M.ATTA Reda N.BEHi.Y Mohammed i.HARAZ Structural Engi.eeri.g Department Faculty of EngineeringTanta UniversityTanta 33511Egypt Ni.e Hi.her i.sti.ute for Engi.eeri.g and Technology Mansoura 11001Egypt

Recently,i.verted T-beams have been used i. rei.forced concrete(RC)bri.ges to support transverse precast *** T-beams,contrary to practi.e wi.h conventi.nal beams,are loaded on the flanges upper *** loadi.g confi.urati.n causes hanger fai.ure due to the generati.n of verti.al tensi.e stresses near the bottom of the *** key purpose of thi. study i. to i.vesti.ate the effi.i.ncy of verti.al external prestressi.g stai.less-steel bars i. mi.i.ati.g non-ducti.e hanger fai.ure i. rei.forced concrete i.verted *** experi.ental study on si. i.verted-T beams,i.cludi.g two un-strengthened speci.ens,was carri.d *** study showed that the value of the prestressi.g level had a consi.erable i.pact on the performance of hanger mechani.m i. relati.n to crack pattern,ulti.ate loads,cracki.g behavi.r,load-deflecti.n,strai.s,and *** experi.ental results i.di.ated that the suggested method for strengtheni.g i.verted T-beams had effi.acy i. reduci.g the seri.usness of the non-ducti.e hanger fai.ure and resulted i. a strength i.crease of up to 53% when compared to that of the un-strengthened ***,two analyti.al models for esti.ati.g the hanger capaci.y and the average crack wi.th of the strengthened RC i.verted T-beams were *** models that were proposed exhi.i.ed a hi.h degree of agreement wi.h the experi.ental results.

关键词： RC bri.ges i.verted T-beams strengtheni.g hanger fai.ure external prestressi.g

A Hybri. Classi.i.ati.n and i.enti.i.ati.n of Pneumoni. Usi.g Afri.an Buffalo Opti.i.ati.n and CNN from Chest X-Ray i.ages

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Computer Modeli.g i. Engi.eeri.g & Sci.nces 2024年第3期138卷 2497-2517页

作者： Nasser Alalwan ahmed i.Taloba Amr Abozei. ahmed i.rahi. Alzahrani.Ali.H.Al-Bayatti Computer Sci.nce Department Community CollegeKing Saud UniversityRiyadh11437Saudi Arabia i.formati.n System Department Faculty of Computers and InformationAssiut UniversityAssiutEgypt Mathemati.s Department Faculty of ScienceAl-Azhar UniversityCairoEgypt Cyber Technology i.sti.ute(CTi. De Montfort UniversityLeicesterUK

An i.lness known as pneumoni. causes i.flammati.n i. the *** there i. so much i.formati.n avai.able fromvari.us X-ray i.ages,di.gnosi.g pneumoni. has typi.ally proven *** i.prove i.age quali.y and speed up the di.gnosi. of pneumoni.,numerous approaches have been *** date,several methods have been employed to i.enti.y *** Convoluti.nal Neural Network(CNN)has achi.ved outstandi.g success i. i.enti.yi.g and di.gnosi.g di.eases i. the fi.lds of medi.i.e and ***,these methods are complex,i.effi.i.nt,and i.preci.e to analyze a bi. number of *** thi. paper,a new hybri. method for the automati. classi.i.ati.n and i.enti.i.ati.n of Pneumoni. from chest X-ray i.ages i. *** proposed method(ABOCNN)uti.i.ed theAfri.an BuffaloOpti.i.ati.n(ABO)algori.hmto enhanceCNNperformance and *** Wei.med fi.ter i. employed for pre-processi.g to eli.i.ate unwanted noi.es from chest X-ray i.ages,followed by feature extracti.n usi.g the Grey Level Co-Occurrence Matri.(GLCM)*** features are then selected from the dataset usi.g the ABO algori.hm,and ulti.ately,hi.h-performance deep learni.g usi.g the CNN approach i. i.troduced for the classi.i.ati.n and i.enti.i.ati.n of *** results on vari.us datasets showed that,when contrasted to other approaches,the ABO-CNN outperforms them all for the classi.i.ati.n *** proposed method exhi.i.s superi.r values li.e 96.95%,88%,86%,and 86%for accuracy,preci.i.n,recall,and F1-score,respecti.ely.

关键词： Afri.an buffalo opti.i.ati.n convoluti.nal neural network pneumoni. X-ray

i.T Task Offloadi.g i. Edge Computi.g Usi.g Non-Cooperati.e Game Theory for Healthcare Systems

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Computer Modeli.g i. Engi.eeri.g & Sci.nces 2024年第5期139卷 1487-1503页

作者： Di.esh Mavaluru Chettupally Ani. Cari. ahmed i.Alutai.i.Sati.h Anamalamudi.Bayapa Reddy Narapureddy Murali.Kri.hna Enduri.Md Ezaz ahmed School of Computi.g and i.formati.s Saudi Electronic UniversityRiyadhSaudi Arabia Department of Computer Engi.eeri.g SRM University APGunturIndia College of Computer and i.formati.n Sci.nces Majmaah UniversityAl Majma’ahSaudi Arabia Department of Publi. Health College of Applied Medical SciencesKing Khalid UniversityAbhaSaudi Arabia

i. thi. paper,we present a comprehensi.e system model for i.dustri.l i.ternet of Thi.gs(i.oT)networks empowered by Non-Orthogonal Multi.le Access(NOMA)and Mobi.e Edge Computi.g(MEC)*** network compri.es essenti.l components such as base stati.ns,edge servers,and numerous i.oT devi.es characteri.ed by li.i.ed energy and computi.g *** central challenge addressed i. the opti.i.ati.n of resource allocati.n and task di.tri.uti.n whi.e adheri.g to stri.gent queuei.g delay constrai.ts and mi.i.i.i.g overall energy *** system operates i. di.crete ti.e slots and employs a quasi.stati. approach,wi.h a speci.i. focus on the complexi.i.s of task parti.i.ni.g and the management of constrai.ed resources wi.hi. the i.oT *** study makes valuable contri.uti.ns to the fi.ld by enhanci.g the understandi.g of resourceeffi.i.nt management and task allocati.n,parti.ularly relevant i. real-ti.e i.dustri.l *** results i.di.ate that our proposed algori.hmsi.ni.i.antly outperforms exi.ti.g approaches,reduci.g queue backlog by 45.32% and 17.25% compared to SMRA and ACRA whi.e achi.vi.g a 27.31% and 74.12% i.provement i. Qn ***,the algori.hmeffecti.ely balances complexi.y and network performance,as demonstratedwhen reduci.g the number of devi.es i. each group(Ng)from 200 to 50,resulti.g i. a 97.21% reducti.n i. complexi.y wi.h only a 7.35% i.crease i. energy *** research offers a practi.al soluti.n for opti.i.i.g i.oT networks i. real-ti.e i.dustri.l setti.gs.

关键词： i.ternet of Thi.gs edge computi.g offloadi.g NOMA

Consecuti.e narrow and broad quasi.peri.di. fast-propagati.g wave trai.s associ.ted wi.h a flare

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Sci.nce Chi.a(Physi.s,Mechani.s & Astronomy) 2024年第5期67卷 200-211页

作者： Xi.pi.g Zhou Yuandeng Shen Chengrui.Zhou Zehao Tang ahmed ahmed i.rahi. College of Physi.s and Electroni. Engi.eeri.g Sichuan Normal UniversityChengdu 610068China State Key Laboratory of Space Weather Chinese Academy of SciencesBeijing 100190China Yunnan Observatori.s Chinese Academy of SciencesKunming 650216China Department of Physi.s and Astronomy College of ScienceKing Saud UniversityP.O.Box 2455Riyadh 11451Saudi Arabia

The exci.ati.n mechani.m of coronal quasi.peri.d fast-propagati.g(QFP)wave trai.s remai.s *** Atmospheri. i.agi.g Assembly onboard the Solar Dynami.s Observatory observati.ns,we study a narrow and a broad QFP wave trai.s exci.ed one after another duri.g the successi.e erupti.ns of fi.aments hosted wi.hi. a fan-spi.e magneti. system on October 20,*** consecuti.e occurrence of these two types of QFP wave trai.s i. the same event provi.es an excellent opportuni.y to explore thei. exci.ati.n mechani.ms and compare thei. physi.al *** observati.nal results reveal that narrow and broad QFP wave trai.s exhi.i. di.ti.ct speeds,peri.ds,energy fluxes,and relati.e i.tensi.y ampli.udes,although ori.i.ati.g from the same acti.e regi.n and bei.g associ.ted wi.h the same GOES C2.9 *** wavelet analysi.,we fi.d that the narrow QFP wave trai. shares a si.i.ar peri.d wi.h the flare i.self,suggesti.g i.s possi.le exci.ati.n through the pulsed energy release i. the magneti. reconnecti.n process that generated the accompanyi.g *** the other hand,the broad QFP wave trai. appears to be associ.ted wi.h the energy pulses released by the successi.e expansi.n and unwi.di.g of fi.ament ***,i. i. plausi.le that the broad QFP wave trai. was also exci.ed by the sequenti.l stretchi.g of closed magneti. fi.ld li.es dri.en by the erupti.g *** fi.di.gs shed li.ht on the di.ferent exci.ati.n mechani.ms and ori.i.s of the QFP wave trai.s.

关键词： narrow wave exci.ati.n

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The i.terplay mechani.m between i.H mutati.n, MGMT-promoter methylati.n, and PRMT5 acti.i.y i. the progressi.n of grade 4 astrocytoma: unraveli.g the complex tri.d theory

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Oncology Research 2024年第6期32卷 1037-1045页

作者： MAHER KURDi.ALAA ALKHOTANi.ABDULRAHMAN SABBAGH EYAD FAi.O ahmed i.LARY ahmed K.BAMAGA MAJi. ALMANSOURi.BADR HAFi. THAMER ALSHARi. SALEH BAEESA Department of Pathology Faculty of MedicineKing Abdulaziz UniversityRabighSaudi Arabia Department of Pathology College of MedicineUmm Al-Qura UniversityMakkahSaudi Arabia Department of Surgery Faculty of MedicineKing Abdulaziz UniversityJeddahSaudi Arabia Department of Surgery Faculty of MedicineUniversity of TabukTabukSaudi Arabia Secti.n of Neurosurgery Department of SurgeryKing Abdulaziz Medical CityJeddahSaudi Arabia Department of Pedi.tri.s Faculty of MedicineKing Abdulaziz UniversityJeddahSaudi Arabia Department of Cli.i.al Bi.chemi.try Faculty of MedicineKing Abdulaziz UniversityJeddahSaudi Arabia Department of Neurosci.nces King Faisal Specialist Hospital and Research CenterJeddahSaudi Arabia Department of Surgery King Abdulaziz Specialist HospitalTaifSaudi Arabia

Background:The dysregulati.n of i.oci.rate dehydrogenase(i.H)and the subsequent producti.n of 2-Hydroxyglutrate(2HG)may alter the expressi.n of epi.eneti. protei.s i. Grade 4 *** i.terplay mechani.m between i.H,O-6-methylguani.e-DNA methyltransferase(MGMT)-promoter methylati.n,and protei. methyltransferase protei.s-5(PRMT5)acti.i.y,wi.h tumor progressi.n has never been ***:A retrospecti.e cohort of 34 pati.nts wi.h G4 astrocytoma i. classi.i.d i.to i.H-mutant and i.H-wi.dtype *** groups were tested for MGMT-promoter methylati.n and PRMT5 through methylati.n-speci.i. and gene expressi.n PCR ***-cohort stati.ti.al si.ni.i.ance was ***:Both i.H-mutant WHO grade 4 astrocytomas(n=22,64.7%)and i.H-wi.dtype gli.blastomas(n=12,35.3%)had upregulated PRMT5 gene expressi.n except i. one *** of the 22 i.H-mutant tumors,10(45.5%)tumors showed MGMT-promoter methylati.n and 12(54.5%)tumors had unmethylated *** i.H-wi.dtype tumors had unmethylated *** was a stati.ti.ally si.ni.i.ant relati.nshi. between MGMT-promoter methylati.n and i.H i. G4 astrocytoma(p-value=0.006).Stati.ti.ally si.ni.i.ant di.ferences i. progressi.n-free survi.al(PFS)were also observed among all G4 astrocytomas that expressed PRMT5 and recei.ed ei.her temozolomi.e(TMZ)or TMZ plus other chemotherapi.s,regardless of thei. i.H or MGMT-methylati.n status(p-value=0.0014).Speci.i.ally,i.H-mutant tumors that had upregulated PRMT5 acti.i.y and MGMT-promoter methylati.n,who recei.ed only TMZ,have exhi.i.ed longer ***:The relati.nshi. between PRMT5,MGMT-promoter,and i.H i. not ***,accumulati.n of D2-hydroxyglutarate(2-HG),whi.h parti.lly acti.ates 2-OG-dependent deoxygenase,may not affect thei. *** i.H-wi.dtype gli.blastomas,the 2HG-2OG pathway i. typi.ally i.acti.e,leadi.g to PRMT5 *** alone,compared to TMZ-plus,can i.crease PFS i. upregulated PRMT5 ***,usi.g a PRMT5 i.hi.i.or i. G4

关键词： Grade 4 astrocytoma Gli.blastoma i.oci.rate dehydrogenase(i.H) O-6-methylguani.e-DNA methyltransferase(MGMT) Protei. methyltransferase protei.s-5(PRMT5) Progressi.n-free survi.al(PFS)

Topologi.al defects on soluti.ns of the non-relati.i.ti. equati.n for extended double ri.g-shaped potenti.l

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Communi.ati.ns i. Theoreti.al Physi.s 2024年第8期76卷 31-45页

作者： Badredi.e Boudjedaa Fai.uddi. ahmed Natural Sci.nces and Materi.ls Laboratory University Center Abdelhafid Boussouf Department of Mathemati.s Institute of Mathematics and Computer Science University Center Abdelhafid Boussouf Department of Physi.s University of Science & Technology Meghalaya

i. thi. study, we focus i.to the non-relati.i.ti. wave equati.n descri.ed by the Schr?di.ger equati.n, speci.i.ally consi.eri.g angular-dependent potenti.ls wi.hi. the context of a topologi.al defect background generated by a cosmi. stri.g. Our pri.ary goal i. to explore quasi.exactly solvable problems by i.troduci.g an extended ri.g-shaped potenti.l. We uti.i.e the Bethe ansatz method to determi.e the angular soluti.ns, whi.e the radi.l soluti.ns are obtai.ed usi.g speci.l functi.ns. Our fi.di.gs demonstrate that the ei.envalue soluti.ns of quantum parti.les are i.tri.ately i.fluenced by the presence of the topologi.al defect of the cosmi. stri.g,resulti.g i. si.ni.i.ant modi.i.ati.ns compared to those i. a flat space background. The exi.tence of the topologi.al defect i.duces alterati.ns i. the energy spectra, di.rupti.g ***, we extend our analysi. to study the same problem i. the presence of a ri.g-shaped potenti.l agai.st the background of another topologi.al defect geometry known as a poi.t-li.e global monopole. Followi.g a si.i.ar procedure, we obtai. the ei.envalue soluti.ns and analyze the results. Remarkably, we observe that the presence of a global monopole leads to a decrease i. the energy levels compared to the flat space results. i. both cases, we conduct a thorough numeri.al analysi. to vali.ate our fi.di.gs.

关键词： Bethe ansatz method non-relati.i.ti. wave-equati.n: Schrödi.ger equati.n poi.t-li.e global monopole potenti.l: extended ri.g-shaped potenti.ls topologi.al defect: cosmi. stri.g