检索结果-南通市图书馆

Core-sca.e m.deling of surfa.ta.t-a.sisted sponta.eous wa.er im.ibition in ca.bona.es

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Petroleum 2022年第4期8卷 458-465页

作者： Xinga.g Bu m.ng Ha. abdulkareem m.a.Sofi Beijing Resea.ch Center Aramco AsiaBeijing100102China EXPEC a.va.ced Resea.ch Center Saudi AramcoDhahran31311Saudi Arabia

This work num.rica.ly investiga.es surfa.ta.t effects on sponta.eous wa.er im.ibition in oil-wet *** open bounda.y core-sca.e im.ibition m.del with 9×9×10 gridblocks wa. used in UTCHEm.to sim.la.e ca.bona.e core plug exposure to a.va.t wa.er *** sim.la.ion m.dels were developed ba.ed on surfa.ta.t-a.sisted im.ibition tests tha. were conducted in seconda.y a.d tertia.y oil production m.des using a.0}tt cells a. 75℃.Ca.illa.y a.d gra.ity forces were ca.tured by history m.tching the *** history m.tching,the inputs for surfa.ta.t a.sorption a.d diffusion,ca.illa.y pressure a.d rela.ive perm.a.ility were *** tertia.y m.de,the surfa.ta.ts-a.sisted im.ibition process presents the perform.nce in m.xed-wet sta.e ra.her tha. oil-wet sta.e,which is governed by wetta.ility a.tera.ion.a.sim.la.ion m.del for surfa.ta.t-a.sisted im.ibition in seconda.y m.de wa. used to investiga.e the effects of va.ious fa.tors including interfa.ia. tension(IFT)reduction,wetta.ility a.tera.ion,a.sorption,volum. of surrounding wa.er a.d ca.illa.y *** sim.la.ion results suggest tha. surfa.ta.t-a.sisted wa.er im.ibition in seconda.y m.de is gra.ity dom.na.t,which is fa.ilita.ed by both IFT reduction a.d wetta.ility a.tera.ion ca.sed by a.dition of proper *** from.wa.er im.ibition in wa.er-wet core,it presents vertica.ly dom.na.t oil flow with a.hem.spherica. oil-rich a.ea.a.d uneven rem.ining oil *** is obvious tha. sufficient surfa.ta.t supply in va.t wa.er is required to m.ke effective im.ibition,in considera.ion of surfa.ta.t consum.tion a.d cha.ges in concentra.ion *** core-sca.e m.deling provides insights of surfa.ta.t-a.sisted im.ibition in initia.ly oil-wet ca.bona.es a.d helps sca.e up the a.plica.ion in a.cost-effective wa..

关键词： Surfa.ta.t Im.ibition Core-sca.e m.deling Sim.la.ion Wetta.ility a.tera.ion Interfa.ia. tension

m.a.urem.nt of the Effective Dose Ra.ia.ion a. Ra.iology Depa.tm.nts of Som. Hospita.s in Duhok Governora.e

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journa. of m.dern Physics 2015年第5期6卷 566-572页

作者： Dinda. S. Ba.i Pshtiwa. m. a.0}n Na.za. a. abdulkareem Depa.tm.nt of Physics Faculty of Science University of Zakho Zakho Iraq

During opera.ing of the X-ra. m.chines, if the protection of X-ra. room. is insufficient, not only the pa.ient but a.so clinica. sta.fs a. well a. public a.e exposed to high X-ra. dosa.e a.d they a.e a.fected from.X-ra. rela.ed to the dose level. In the present survey, by testing the ra.iologica. lea.a.e a.d sca.ter from.X-ra.s m.chines in ra.iology depa.tm.nts of 7 ra.dom.y selected hospita.s in Duhok governora.e, the effects dose of X-ra. to the both control pa.el a.ea.a.d the pa.ients wa.ting or visiting a.ea.who a.e loca.ed nea. the ra.iogra.hy room. were m.a.ured. The dose wa. recorded for a.ra.ge of pea. kilovolta.e (kVp) a.d m.s va.ues to find efficiency of shielding m.teria.s (ba.riers) of ra.iogra.hy room. for different X-ra.s level. The m.a.urem.nts were perform.d a. one m.ter a.ove the ground surfa.e which wa. the sa.0} height of X-ra.s tube by using Ga.0}a.Scout dosim.ter. From.the m.a.urem.nt results, it wa. seen tha. the m.st hospita.s ba.riers (doors a.d wa.ls) were not a.propria.e to the sta.da.ds except 2 hospita.s. The m.xim.m.effective doses were m.a.ured in uncontrolled a.ea.of Kha.er hospita. which wa. 82.48 ± 0.73 m.v&m.ddot;yr-1 tha. wa. m.ch m.re tha. the reference dose lim.ts a.d in controlled a.ea.of Ha.a. Ba.da.Za.oka.hospita. which wa. 12.98 ± 0.16 m.v&m.ddot;yr-1. In result, the knowledge a.out the ra.ia.ion dose a.fecting the ra.iologists a.d public in the selected hospita.s wa. obta.ned, a.d by inform.ng the ra.iologists a.d the hospita.s m.na.em.nts, the necessa.y regula.ions would be pla.ned.

关键词： Ra.ia.ion Dose Lea.a.e Ra.ia.ion Ra.ia.ion Protection Dia.nostic X-Ra. X-Ra. Room Duhok Hospita.s Controlled a.d Uncontrolled a.ea.

Com.a.ison of a.gressiveness Beha.ior of Chloride a.d Iodide Solutions on 304 a.d 304L Sta.nless Steel a.loys

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

m.teria.s Sciences a.d a.plica.ions 2017年第12期8卷 889-898页

作者： Sha.m.a.m.hdi Sa.ih Ibteha. K. Sha.ir abdulkareem m. a. a.-Sa.0}arraie Depa.tm.nt of Chem.ca. Engineering College of Engineering University of Baghdad Baghdad Iraq Depa.tm.nt of Chem.stry College of Science University of Baghdad Baghdad Iraq

The a.gressive effect of chloride a.ion in com.a.ison to iodide a.ion on the pitting corrosion a.ta.k of 304 a.d 304L sta.nless steel (SS) a.loys wa. investiga.ed by using the cyclic potentiodyna.0}c pola.iza.ion test a. 0.6 m.Sodium.Ha.ide sa.ts (Na.) solution a.d different tem.era.ures. The two a.loys 304 a.d 304L SS suffered from.severe pitting corrosion a. room.tem.era.ure up to 50°C in a.chloride conta.ning solution with the higher resista.ce observed for 304L in com.a.ison to the 304 while on pits were detected in iodide solution for both a.loys. The pitting potentia.s of the two a.loys in 0.6 m.Na.l solution reduced with the increa.e of the tem.era.ure. Exa.0}na.ion of the a.loys’ surfa.es wa. conducted by using the sca.ning electron m.croscopes where it revea.ed tha. the occurrence of pitting a.ta.k seem. like hem.spherica. or irregula. pits with different sizes.

关键词： Sta.nless Steel Pitting Corrosion Sodium Ha.ide Iodide

The Roles of a.idity on Sono-Electrodeposition of Silver Na.opa.ticles

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

m.teria.s Sciences a.d a.plica.ions 2018年第8期9卷 671-678页

作者： Ka.eem.N. a.ed a.m.d Q. a.dulla. abdulkareem m. a. alsam.arraie 1Physics Depa.tm.nt College of Science University of Baghdad Baghdad Iraq Physics Depa.tm.nt College of Science University of Baghdad Baghdad Iraq Depa.tm.nt of Chem.stry College of Science University of Baghdad Baghdad Iraq

The a. NPs were produced by sonica. the electrochem.ca. cell tha. the tita.ium.horn serves a. ca.hode a.d the a.ode wa. high purity silver foil, while the electrolyte in a.l experim.nts wa. (0.2 g a. in 250 m. deionized wa.er), the pH wa. va.ied between 2 to 8 using sulfuric a.id a.d sodium.bica.bona.e diluted solutions, the current density wa. m.inta.ned a. 5m./cm. The qua.ity of the products wa. extensively exa.0}ned using: SEm. TEm. a.m. XRD, UV-visible a.d EDX techniques. The results reflected a.clea. fa.t tha. the m.re a.idic electrolyte (lower pH va.ue) ha. produced distorted spherica. la.ger a.NPs, with a.na.row pa.ticles size distribution, while decrea.ing the a.idity (higher pH va.ue) led to sm.ller pa.ticle size, a.d wider size distribution spectrum.

关键词： Silver Sulfa.e Silver Na.opa.ticles Sonoelectrodeposition a.m

Genotoxic a.d Histopa.hologica. Effects of Wa.er Pollution on <i>Cla.ia. ga.iepinus</i>Fish a. Fa.oum.Governora.e, 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

Na.ura. Resources 2020年第11期11卷 499-519页

作者： Kha.id H. Za.hloul Heba.a. m.ha.0}d abdulkareem m. a.dulla.ef m.ha.0}d W. Kha.il Depa.tm.nt of Zoology Faculty of Science Fayoum University Fayoum Egypt

Increa.ing la.d recla.0}tion in El-Fa.oum.governora.e ha. led to increa.e the a.0}unt of dra.na.e wa.er tha. discha.ged without prior trea.m.nts to two m.in dra.ns, El-Wa.i a.d El-Ba.s dra.na.es loa.ed by sa.ts a.d hea.... 详细信息

Increasing land reclamation in El-Fayoum governorate has led to increase the amount of drainage water that discharged without prior treatments to two main drains, El-Wadi and El-Bats drainages loaded by salts and heavy metals. So, the present investigation aims to evaluate quality of water samples collected from a branch of the river Nile (El-Lahon canal) and the main drains (El-Bats and El-Wadi) at Fayoum governorate on some biomarkers of the Nile catfish;Clarias gariepinus inhabiting the studied degradable aquatic habitats. Water and nighty fish samples colleted from the different studied sites of collection by the help of fishermen for physicochemical analyes of water and fish biochemical analyses and histopathological alteration. Results revealed highly significant differences at P ≤ 0.01 with the highest water ammonia, nitrite, heavy metals (Cu, Zn, Pb and Cd) and lowest dissolved oxygen content accompanied by metals bioaccumulation in vital organs of fish collected from the main drains (El-Bats and El-Wadi) in comparision with that collected from the studied branch of the river Nile. Higher bioaccumulation of the studied heavy metals in gills, liver, kidney and muscles of Clarias gariepinus collected from the main drains significant increase in serum glucose, liver and kidney functions, disturbance in protein profile of fish collected from the studied main drains than that of fish collected from the river Nile branch, El-Lahon that showed more or less normal values. Moreover, histopathological alterations in gills, liver, kidneys and clear DNA strand breaks in fish liver cells increased statistically in Clarias gariepinus m.ly:Verda.a.">col

关键词： Dra.na.e Wa.er Ca.fish Genotoxicity Histopa.hology Biochem.ca. Cha.ges

Study the a.tenua.ion Coefficient of Gra.ite to Use It a. Shields a.a.nst Ga.0}a.Ra.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Detection 2016年第2期4卷 33-39页

作者： La.th a.m.d Na.a.0}a.da.sa.ta. Ka.eem.Ha.him.Hussein abdulkareem a.m.d Isra. m. Ha.sa. Depa.tm.nt of Physics College of Science University of Mosul Mosul Iraq Depa.tm.nt of Physics College of Science Kerbala University Kerbala Iraq Depa.tm.nt of Physics Faculty of Science University of Zakho Duhok Iraq

The present work investiga.es the linea. a.d m.ss a.tenua.ion coefficients for ga.0}a.ra.s pra.tica.ly a.d theoretica.ly by using spectroscopy ga.0}a.ra. (UCS-20) a.d progra.0}(XCOm.) for va.ious types of com.on use gra.ite, a.d com.a.es them.with the lea. beca.se of its high blocking a.ility for this type of ra.ia.ion. This pa.er concluded through linea. a.d m.ss a.tenua.ion coefficients m.a.urem.nts tha. these coefficients decrea.e with increa.ing incident photons energy. m.a.urem.nts a.so showed tha. the linea. a.tenua.ion coefficients a.propria.e linea.ly with density while m.ss a.tenua.ion coefficients do not get a.fected.

关键词： Ga.0}a.Ra.s a.tenua.ion Coefficient (Linea. a.d m.ss) Building m.teria.s Sodium.Iodide Detector

COVID-DeepNet: Hybrid m.ltim.da. Deep Lea.ning System.for Im.roving COVID-19 Pneum.nia.Detection in Chest X-ra. Im.ges

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Com.uters, m.teria.s & Continua 2021年第5期67卷 2409-2429页

作者： a.S.a.-Wa.sy m.zin a.ed m.ha.0}ed Shum.os a.-Fa.da.i m.S.m.a.hi Begonya.Ga.cia.Za.ira.n Ka.ra. Ha.0}ed abdulkareem S.a.m.sta.a.Na.la.a.eni m.noj Kum.r Da.-Nhuong Le College of Com.uter Science a.d Inform.tion Technology University of AnbarAnbar31001Iraq College of Com.uter a.d Inform.tion Sciences King Saud UniversityRiyadh11451Saudi Arabia eVIDa.La. University of Deusto.Avda/UniversidadesBilbao24.48007Spain College of a.riculture Al-Muthanna UniversitySamawah66001Iraq Fa.ulty of Com.uter Science a.d Inform.tion Technology University Tun Hussein Onn MalaysiaJohor86400Malaysia School of Energy a.d Environm.nt City University of Hong KongKowloon83Hong Kong Institute of Resea.ch a.d Developm.nt Duy Tan UniversityDanang550000Vietnam Fa.ulty of Inform.tion Technology Duy Tan UniversityDanang550000Vietnam

Corona.irus(COVID-19)epidem.c outbrea. ha. deva.ta.ing effects on da.ly lives a.d hea.thca.e system. *** newly recognized virus is highly tra.sm.ssible,a.d no clinica.ly a.proved va.cine or a.tivira. m.dicine is currently *** dia.nosis of infected pa.ients through effective screening is needed to control the ra.id sprea. of this *** ra.iogra.hy im.ging is a. effective dia.nosis tool for COVID-19 virus a.d ***,a.novel hybrid m.ltim.da. deep lea.ning system.for identifying COVID-19 virus in chest X-ra.(CX-R)im.ges is developed a.d term.d a. the COVID-DeepNet system.to a.d expert ra.iologists in ra.id a.d a.cura.e im.ge ***,Contra.t-Lim.ted a.a.tive Histogra.0}Equa.iza.ion(CLa.E)a.d Butterworth ba.dpa.s filter were a.plied to enha.ce the contra.t a.d elim.na.e the noise in CX-R im.ges,*** from.two different deep lea.ning a.proa.hes ba.ed on the incorpora.ion of a.deep belief network a.d a.convolutiona. deep belief network tra.ned from.scra.ch using a.la.ge-sca.e da.a.et were then *** a.chitecture,which provides ra.iologists a.high degree of confidence to distinguish hea.thy a.d COVID-19 infected people,wa. *** proposed COVID-DeepNet system.ca. correctly a.d a.cura.ely dia.nose pa.ients with COVID-19 with a.detection a.cura.y ra.e of 99.93%,sensitivity of 99.90%,specificity of 100%,precision of 100%,F1-score of 99.93%,m.E of 0.021%,a.d Rm.E of 0.016%in a.la.ge-sca.e *** system.shows efficiency a.d a.cura.y a.d ca. be used in a.rea. clinica. center for the ea.ly dia.nosis of COVID-19 virus a.d trea.m.nt follow-up with less tha. 3 s per im.ge to m.ke the fina. decision.

关键词： Corona.irus epidem.c deep lea.ning deep belief network convolutiona. deep belief network chest ra.iogra.hy im.ging

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

致密气藏体积压裂工艺技术研究

致密气藏体积压裂工艺技术研究

作者： abdulkareem HUSSEIN m.Ha.1}ED a.-m.KRa.1}NI 重庆科技学院

学位级别：硕士

随着中国社会经济的高速发展,对能源的需求越来越大,导致中国石油对外依存度超过70%,且连续多年居高不下,因此加快国内非常规油气资源的探勘开发对保证中国能源安全具有重要意义。致密油气是非常规油气的重要组成部分,其资源量为10×10k... 详细信息

随着中国社会经济的高速发展,对能源的需求越来越大,导致中国石油对外依存度超过70%,且连续多年居高不下,因此加快国内非常规油气资源的探勘开发对保证中国能源安全具有重要意义。致密油气是非常规油气的重要组成部分,其资源量为10×10k m.可采资源量为10×10m.主要分布在鄂尔多斯盆地、成都盆地和塔里木盆地,而成都盆地储层主要为川西须家河组。致密气层由于其储层致密,基质孔隙度和渗透率非常低,井天然产能低甚至无天然产能,因此一般需要采用水力压裂投产措施。针对致密气层,要提高水力压裂增产效果,需要提高水力压裂改造范围,实现改造范围内的体积化改造,即实现平面上和垂向上的多裂缝的缝网改造,这就是体积压裂。针对致密气层的体积压裂,增产机理是什么?如何优化施工参数?这些都要回答,因此本文开展了致密气藏体积压裂工艺技术研究。针对致密气藏的体积压裂工艺,本文开展了致密气藏体积压裂增产机理、体积压裂适应性评价、体积压裂关键参数优化和降阻水体系系统优化研究。论文首先阐述了体积压裂增产机理和水力压裂复杂裂缝延伸机理并分析了主应力差对复杂裂缝延伸的影响;其次从储层天然裂缝、地应力和储层岩石脆性三个方面分析了致密气藏体积压裂的适应性;然后建立了体积压裂条件下储层诱导应力场计算模型并开展了裂缝参数和施工参数优化研究;接着开展了致密气藏体积压裂降阻水体系优化,最后将研究成果应用于现场,检验研究成果的适用性。论文明确了致密气藏体积压裂的增产机理,论证了体积压裂对致密气藏的适应性,采用建立的数学模型优化了施工井的裂缝参数和施工参数以及现场施工用降阻水体系。现场试验表明,试验井增产效果显著。研究成果现场试验5井次,增产效果显著。B储层组压后单井平均无阻流量8.20×10～4m.d,是同河道邻井常规压裂改造方式平均无阻流量5.64×10～4m.d的1.5倍;a.层组压后单井平均无阻流量2.89×10～4m.d,是邻井常规压裂改造方式平均无阻流量1.00×10～4m.d的2.9倍。研究成果对川西致密气藏的高效开发具有重要的指导意义,对其他油田致密气藏的开发具有一定的借鉴意义。

关键词：体积压裂致密气藏增产机理延伸机理裂缝扩展压裂优化

Corrosion Protection of Iron a.loy Using <i>Pega.um.ha.m.la.</i>Extra.t a. Inhibitor in a.idic Solution

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

m.teria.s Sciences a.d a.plica.ions 2015年第11期6卷 1061-1070页

作者： Khulood a.id a.-Sa.die Ha.fa. a.0}er a.a. Ha.der abdulkareem Yousif a.m.shhda.i Depa.tm.nt of Chem.stry College of Science Baghdad University Baghdad Iraq Depa.tm.nt of Dentistry Al-Rasheed University College Baghdad Iraq

This work describes the inhibition effect of different concentra.ion of a. a.ueous extra.ted of Pega.um.ha.m.la.seed on the corrosion of ca.bon steel in 1 m.H2SO4 solution using potentiosta.ic pola.iza.ion techniques a. the tem.era.ure ra.ge (298 - 328) K. The result showed tha. the inhibition efficiency increa.ed with increa.ing of extra.t inhibitor concentra.ion a.d tem.era.ure. The a.sorption of inhibitor on ca.bon steel surfa.e wa. fit into La.gm.ir a.sorption isotherm. Kinetic a.d therm.dyna.0}c pa.a.0}ters governing the corrosion a.d the a.sorption process were ca.cula.ed a.d discussed.

关键词： Corrosion Ca.bon Steel Seed Pega.um ha.m.la a.idic Solution