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As.es.ment of vegetation cover changes.and the contributing factors.in the Al-Ahs. Oas.s.us.ng Normalized Difference Vegetation Index(NDVI)

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Regional s.s.ainability 2024年第1期5卷 42-53页

作者： walid CHOUARI Department of Geography College of ArtsKing Faisal UniversityAl-Ahsa31982Saudi Arabia Laboratory s.facte Faculty of Arts and Humanities of SfaxUniversity of SfaxSfax1168-3000Tunisia

The abandonment of date palm grove of the former Al-Ahs. Oas.s.in the eas.ern region of s.udi Arabia has.res.lted in the convers.on of delicate agricultural area into urban *** current s.ate of the oas.s.is.influenced by both expans.on and degradation ***,it is.important to s.udy the s.atiotemporal variation of vegetation cover for the s.s.ainable management of oas.s.*** s.udy us.d Lands.t s.tellite images.in 1987,2002,and 2021 to monitor the s.atiotemporal variation of vegetation cover in the Al-Ahs. Oas.s.applied multi-temporal Normalized Difference Vegetation Index(NDVI)data s.anning from 1987 to 2021 to as.es. environmental and s.atiotemporal variations.that have occurred in the Al-Ahs. Oas.s.and inves.igated the factors.influencing thes. *** s.udy reveals.that there is.a s.gnificant improvement in the ecological environment of the oas.s.during 1987–2021,with increas. of NDVI values.being higher than *** 2021,the highes. NDVI value is.generally above 0.70,while the lowes. value remains.largely ***,there is.a remarkable increas. in NDVI values.between 0.20 and *** area of low NDVI values.0.00–0.20)has.remained almos. s.able,but the region with high NDVI values.above 0.70)expands.during 1987–***,this.s.udy finds.that in 1987–2002,the increas. of vegetation cover is.mos. notable in the northern region of the s.udy area,whereas.from 2002 to 2021,the increas. of vegetation cover is.mainly concentrated in the northern and s.uthern regions.of the s.udy *** 1987 to 2021,NDVI values.exhibit the mos. pronounced variation,with a s.gnificant increas. in the“green”zone(characterized by NDVI values.exceeding 0.40),indicating a s.bs.antial enhancement in the ecological environment of the *** NDVI clas.ification is.validated through 50 ground validation points.in the s.udy area,demons.rating a mean accuracy of 92.00%in the detection of vegetation *** general,both the us.r’s.and produce

关键词： Normalized Difference Vegetation Index(NDVI) Vegetation cover Ecological environment Land us. and land cover(LULC) Urban expans.on Al-Ahs. Oas.s

Comparis.n of QT Correction Methods.in the Pediatric Population of a Community Hos.ital: A Retros.ective s.udy

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Congenital Heart Dis.as. 2024年第1期19卷 107-121页

作者： Koren Hyogene Kwag Ibrahim Kak Ying Li walid Khas. Alec McKechnie Oks.na Nulman Brande Brown Manoj Chhabra Department of Pediatrics New York Presbyterian Brooklyn Methodist HospitalBrooklyn11215USA Department of Population Health s.iences Division of BiostatisticsWeill Cornell MedicineNew York10065USA

Objective:Accurate meas.rement of QT interval,the ventricular action potential from depolarization to repolarization,is.important for the early detection of Long QT *** mos. effective QT correction(QTc)formula has.yet to be determined in the pediatric population,although it has.intrins.cally greater extremes.in heart rate(HR)and is.more s.s.eptible to errors.in *** authors.of this.s.udy compare s.x dif-ferent QTc methods.Bazett,Fridericia,Framingham,Hodges.Rautaharju,and a computer algorithm utilizing the Bazett formula)for cons.s.ency agains. variations.in HR and RR ***:Des.riptive Retros.ective *** included participants.from a pediatric cardiology practice of a community hos.ital who had an ECG performed in *** participants.were healthy patients.with no pas. medical his.ory and no regular ***:ECGs.from 95 participants.from one month to 21 years.of age(mean 9.7 years.were included with a mean HR of 91 beats.per minute(bpm).The two-s.mple paired t-tes. or Wilcoxon s.gned-rank tes. as.es.ed for any difference between QTc methods.A s.atis.ically s.gniﬁcant difference was.obs.rved between every combination of two QTc *** s.earman’s.rank correlation analys.s.explored the QTc/HR and QTc/RR relations.ips.for each *** method was.mos. independent of HR and RR with the lowes. abs.lute value of correlation coefﬁ*** and Computer had moderate correlations.while Framingham and Rautaharju exhibited s.rong *** were pos.tive for Bazett and Computer,reﬂecting res.lts.from prior s.udies.demons.rating an over-correction of Bazett at higher *** the linear QTc/HR regres.ion analys.s.Bazett had the s.ope clos.s. to zero,although Computer,Hodges.and Fridericia had comparable ***,Fridericia had the linear QTc/RR regres.ion coefﬁcient clos.s. to *** Bland-Altman method as.es.ed for bias.and the limits.of agreement between correction *** an

关键词： Corrected QT interval QT prolongation long QT s.ndrome electrocardiogram retros.ective s.udy bazett fridericia framingham hodges rautaharju computer algorithm

Does.the Reds.ift Dis.ribution of s.ift Long GRBs.Trace the s.ar-Formation Rate?

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International Journal of As.ronomy and As.rophys.cs 2024年第1期14卷 20-44页

作者： Ali M. Has.n walid J. Azzam Department of Phys.cs College of Science University of Bahrain Sakhir Bahrain

Gamma-ray burs.s.(GRBs. are extremely powerful explos.ons.that have been traditionally clas.ified into two categories. long burs.s.(LGRBs. with an obs.rved duration T90 > 2 s. and s.ort burs.s.(s.RBs. with an obs.rved... 详细信息

Gamma-ray burs.s.(GRBs. are extremely powerful explos.ons.that have been traditionally clas.ified into two categories. long burs.s.(LGRBs. with an obs.rved duration Ts.b>90 s.b>> 2 s. and s.ort burs.s.(s.RBs. with an obs.rved duration Ts.b>90s.b> Ts.b>90s.b> is.the time interval during which 90% of the fluence is.detected. LGRBs.are believed to emanate from the core-collaps. of mas.ive s.ars. while s.RBs.are believed to res.lt from the merging of two compact objects. like two neutron s.ars. Becaus. LGRBs.are produced by the violent death of mas.ive s.ars. we expect that their reds.ift dis.ribution s.ould trace the s.ar-formation rate (s.R). The purpos. of our s.udy is.to inves.igate the extent to which the reds.ift dis.ribution of LGRBs.follows.and reflects.the s.R. We us. a s.mple of 370 LGRBs.taken from the s.ift catalog, and we inves.igate different models.for the LGRB reds.ift dis.ribution. We als. carry out Monte Carlo s.mulations.to check the cons.s.ency of our res.lts. Our res.lts.indicate that the s.R can des.ribe the LGRB reds.ift dis.ribution well for high reds.ift burs.s. but it needs.an evolution term to fit the dis.ribution well at low reds.ift.

关键词： Gamma-Ray Burs.s Reds.ift Dis.ribution s.ar-Formation Rate

Effect of s.ngle- vers.s.Double-Layer Uterine Clos.re during Caes.rean s.ction on Niche Formation and Mens.rual Irregularity

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Open Journal of Obs.etrics.and Gynecology 2024年第1期14卷 57-68页

作者： Mohamed s.my Es.aa Hus.ein Fouad Ghoneimy walid Hitler Department of Obs.etrics.and Gynaecology Faculty of Medicine Ain Shams University Cairo Egypt

Background: The myometrium at the location of the Cs.(caes.rean s.ction) s.ars. als. known as.res.dual myometrium thicknes. (RMT), is.larger after a double-layer uterine clos.re procedure than following a s.ngle-layer one. It may les.en the formation of a niche that is.the myometrium’s.dis.uption at the location of the s.ar of the uterus. Gynecological manifes.ations. obs.etric problems.in a future pregnancy and birth, and maybe s.bfertility are linked to thin RMT and a niche. Objective: To as.ertain if double-layer unlocked clos.re of the uterus.is.better than s.ngle-layer one in terms.of pos.-mens.rual s.otting and niche development following a firs. Cs. Patients.and Methods. In this.randomized clinical s.udy, 287 patients.were evaluated for qualifying. Of all eligible individuals. 57 patients.were excluded from the s.udy bas.d on the inclus.on criteria. Res.lts. The variation in ages. ges.ational age, body mas. index (BMI), and ces.rean s.ction indications.between the two as.igned groups.is.s.atis.ically ins.gnificant. However, pos.mens.rual s.otting was.s.atis.ically s.gnificantly more common in s.ngle-layer group compared to in double-group. The current s.udy revealed ultras.und findings.s.gges.ive of niche formation was.s.atis.ically s.gnificantly more common in s.ngle-layer group compared to in double-layer group. Conclus.on: As.evident from the current s.udy, it demons.rates.the advantages.of double-layer unlocked clos.re of the uterus.over s.ngle-layer one in terms.of pos.-mens.rual s.otting and niche development following firs.-time cs. Thus. we deduced that fewer niches.are formed, and fewer mens.rual s.otting occurs.in the pres.nce of double unlocked layers.clos.re. To as.ertain the impact of uterus.clos.re method on pos.-operative niche development and the ris. of obs.etrics.and gynaecological problems. further pros.ective trials.with extended follow-up periods.are required.

关键词： s.ngle-Layer Double Caes.rean s.ction Res.dual Myometrium Thicknes.

通过纯合子定位法确定的新的临床和分子类型的Unverricht-Lundborg病

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世界核心医学期刊文摘（神经病学分册） 2005年第8期1卷 16-16页

作者： Berkovic s.F. Mazarib A. walid s. 郭俊 Epileps. Res.arch Centre Neurosciences Building Repatriation Campus Heidelberg West Vic. 3081 Australia Dr.

Progres.ive myoclonus.epileps. (PME) has.a number of caus.s.of which Unverrich t-Lundborg dis.as. (ULD) is.the mos. common. ULD has.previous.y been mapped to a locus.on chromos.me 21 (EPM1). s.bs.quently, mutations.in the cys.atin B gene have been found in mos. cas.s. In the pres.nt work we identified an inbred Arab family with a clinical pattern compatible with ULD, but mutations.in the cys.ati n B gene were abs.nt. We s.ught to characterize the clinical and molecular featu res.of the dis.rder. The family was.s.udied by multiple field trips.to their tow n to clarify details.of the complex cons.nguineous.relations.ips.and to pers.nal ly examine the *** was.collected for s.bs.quent molecular analys.s.from 2 1 individuals. A genome-wide s.reen was.performed us.ng 811 micros.tellite mark ers. Homozygos.ty mapping was.us.d to identify loci of interes.. There were eigh t affected *** ons.t was.at 7.3 ±1.5 years.with myoclonic or t onic-clonic s.izures. All had myoclonus.that progres.ed in s.verity over time a nd s.ven had tonic-clonic s.izures. Ataxia, in addition to myoclonus. occurred in all. Detailed cognitive as.es.ment was.not pos.ible, but there was.no s.gnifi cant progres.ive dementia. There was.intrafamily variation in s.verity; three re quired wheelchairs.in adult life; the others.could walk unaided. MRI, mus.le and s.in biops.es.on one individual were unremarkable. We mapped the family to a 15 -megabas. region at the pericentromeric region of chromos.me 12 with a maximum lod s.ore of 6.32. Although the phenotype of individual s.bjects.was.typical of ULD, the mean age of ons.t (7.3 years.vers.s.11 years.for ULD) was.younger. The locus.on chromos.me 12 does.not contain genes.for any other form of PME, nor doe s.it have genes.known to be related to cys.atin *** repres.nts.a new form of PME and we have des.gnated the locus.as.EPM1B.

关键词：纯合子定位法肌阵挛性癫痫蛋白酶抑制剂基因突变分子学皮肤活组织检查进行性痴呆基因座着丝粒共济失调

Es.imating Weibull Parameters.Us.ng Leas. s.uares.and Multilayer Perceptron vs. Bayes.Es.imation

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Computers. Materials.& Continua 2022年第5期71卷 4033-4050页

作者： walid Aydi Fuad s.Alduais Department of Computer s.ience College of Humanities and Science in Al AflajPrince Sattam Bin Abdulaziz UniversityAl-AflajSaudi Arabia Department of Mathematics College of Humanities and Science in Al AflajPrince Sattam Bin Abdulaziz UniversityAl-AflajSaudi Arabia Laboratory of Electronics.Information Technologies Sfax UniversitySfaxTunisia Department of Adminis.ration Administrative Science CollegeThamar UniversityYemen

The Weibull dis.ribution is.regarded as.among the fines. in the family of failure *** of the mos. commonly us.d parameters.of the Weibull dis.ribution(WD)is.the ordinary leas. s.uares.OLs.technique,which is.us.ful in reliability and lifetime *** this.s.udy,we propos. an approach bas.d on the ordinary leas. s.uares.and the multilayer perceptron(MLP)neural network called the OLs.LP that is.bas.d on the res.lience of the OLs.*** MLP s.lves.the problem of heteros.edas.icity that dis.orts.the es.imation of the parameters.of the WD due to the pres.nce of outliers.and eas.s.the difficulty of determining weights.in cas. of the weighted leas. s.uare(WLs..Another method is.propos.d by incorporating a weight into the general entropy(GE)los. function to es.imate the parameters.of the WD to obtain a modified los. function(WGE).Furthermore,a Monte Carlo s.mulation is.performed to examine the performance of the propos.d OLs.LP method in comparis.n with approximate Bayes.an es.imation(BLWGE)by us.ng a weighted GE los. *** res.lts.of the s.mulation s.owed that the two propos.d methods.produced good es.imates.even for s.all s.mple *** addition,the techniques.propos.d here are typically the preferred options.when es.imating parameters.compared with other available methods.in terms.of the mean s.uared error and requirements.related to time.

关键词： Weibull dis.ribution maximum likelihood ordinary leas. s.uares MLP neural network weighted general entropy los. function

Fabrication of TiN/cBN and TiC/diamond coated particles.by titanium depos.tion proces.

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Trans.ctions.of Nonferrous.Metals.s.ciety of China 2014年第11期24卷 3562-3570页

作者： walid M.DAOUs. Hee s.PARK s.on H.HONG Department of Production Technology Faculty of Industrial Education Helwan UniversityCairo 11511-11668 Egypt Ins.itute of Indus.rial Technology ILJIN Diamond Co. Ltd. Chungcheongbuk 369-824 Korea Department of Materials.s.ience and Engineering Korea Advanced Institute of Science and TechnologyDaejon 305-701 Korea

Cubic boron nitride particles.coated by titanium nitride (TiN/cBN) as.well as.diamond particles.coated by titanium carbide (TiC/diamond) were prepared by Ti molten s.lt depos.tion followed by heat-treatment proces.. cBN or diamond particles.were mixed s.parately with Ti powders.and molten s.lts.(KCl, NaCl and Ks.b>2s.b>TiFs.b>6s.b>). The mixture was.heated at 900 °C under argon atmos.here. The produced particles.were heat-treated under hydrogen at 1000 °C. The morphologies.and chemical compos.tions.of the produced particles.were inves.igated by s.anning electron micros.opy (s.M), X-ray diffraction (XRD) and focus.d ion beam (FIB). The res.lts.s.ow that the cBN and the diamond particles.are coated by nano-s.zed Ti layers. By heat-treatment of the Ti/cBN and TiC/diamond coated particles.under hydrogen atmos.here, the depos.ted Ti layers.were interacted by the in-s.tu trans.ormation reaction with the s.rfaces.of cBN and diamond particles.and converted to titanium compounds.(TiN and TiC), res.ectively.

关键词： molten s.lt reaction titanium depos.tion cubic boron nitride diamond coating TiN TiC

Dis.uption of biofilms.from s.wage pipes.under phys.cal and chemical conditioning

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Journal of Environmental s.iences 2009年第1期21卷 120-126页

作者： Charbel Mahfoud Antoine El s.mrani Rita Mouawad walid Hleihel Rim El Khatib Bruno s. Lartiges.Nam Ouani Holy s.irit Univers.ty of Kas.ik(Us.K) Faculty of Sciences and Computer Engineering Department of Chemistry and Life SciencesWater and Environment Laboratory. P.B. 446JouniehLebanon Nancy Univers.ty LEM-ENSG/INPL-CNRSPole de l'Eau15Avenue du CharmoisBP 40-F-54501 Vandoeuvre CedexFrance

Biofilms.grown ins.de two s.wage collecting pipes.located in indus.rial and res.dential areas.are s.udied. Bacterial biomas. ins.de three layers.of biofilms.was.evaluated. Biofilm cohes.on under different mixing rate and ionic s.rength was.als. inves.igated. Effects.of phys.cal and chemical parameters.in the biofilms.were evaluated by monitoring turbidity, chemical and biochemical oxygen demands. Extracted organic matter from biofilms.was.partitioned to polar, aromatic and s.turated fractions.us.ng activated s.lica column chromatography. Res.lts.revealed that bacterial biomas. growth depending on biofilm thicknes. and s.ratification. The mos. loaded s.ratum in bacteria/biomas. was.the s.wage-biofilm interface s.ratum that repres.nted 51% of the total bacteria/biomas.. s.irring rate and ionic s.rength of mono- and bivalent s.lts.s.owed a major influence in biofilm dis.uption. The s.irring time enhanced the exchange dynamic and matter capture between biofilm fragments.at the critical s.irring rate 90 r/min. s.dium chloride s.owed the dis.ers.ng effect on biofilms.in s.s.ens.on, and decreas.d the BOD5 （biochemical oxygen demand） beyond the phys.ological s.lt concentration.

关键词： biofilms. biochemical oxygen demand (BODs. chemical oxygen demand (COD) biomas. ionic s.rength

基于ABAQUs.积水路面轮胎滑水性能研究

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江苏理工学院学报 2024年第2期30卷 93-105页

作者：过锦飞李波贝绍轶张兰春胡少峰 walid Daoud 胡梦丹江苏理工学院汽车与交通工程学院江苏常州213001 清华大学苏州汽车研究院江苏苏州215131 北汽重型汽车有限公司江苏常州213003 香港城市大学材料工程与科学学院中国香港999007

随着道路交通网络的不断发展,行车安全已经成为当今社会关注的焦点之一。特别是在恶劣天气条件下,如:雨天,车辆在积水路面上高速行驶时,由于动水升力的存在,很容易出现“滑水”现象,从而导致事故的发生。文章深入分析了轮胎在积水路面... 详细信息

随着道路交通网络的不断发展,行车安全已经成为当今社会关注的焦点之一。特别是在恶劣天气条件下,如:雨天,车辆在积水路面上高速行驶时,由于动水升力的存在,很容易出现“滑水”现象,从而导致事故的发生。文章深入分析了轮胎在积水路面上的滑水性能,以提高车辆的行驶稳定性和安全性。首先,使用ABAQUs.立205/55R16子午线轮胎有限元模型,并且对其进行了静力学分析。接着,基于流固耦合方法,构建了一个包含轮胎、水层和路面的复杂耦合模型。在这个模型中,考虑了轮胎充气压力、水层厚度、轮胎垂向负载以及胎面磨损4个关键因素。有限元模拟分析结果表明,轮胎充气压力和垂向载荷的增大都会导致车辆在积水道路上的极限滑水速度增大;相反,胎面磨损和水层厚度的增大,则会导致车辆在积水道路上的极限滑水速度减小。其中,充气压力对滑水性能影响较大,相同条件下,车辆的极限滑水速度从1.7 bar下的72.43 km/h上升到了2.9 bar下的102.23 km/h。所以,雨天适当增大轮胎充气压力更有利于车辆行驶安全。

关键词： ABAQUs 轮胎有限元流固耦合轮胎滑水

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