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Geogenic Pollution of Groundwater Quality in Gampaha Dis.rict, s.i Lanka: A Cas. s.udy of Groundwater Acidification from Rathupas.ala

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International Journal of Geos.iences 2024年第8期15卷 590-604页

作者： Is.ara Pathirage Anus.ka Upamali Rajapaks.a s. P. s.charitha Bandara G. w. A. Rohan Fernando Pos.graduate Ins.itute of s.ience University of Peradeniya Peradeniya Sri Lanka Ins.rument Centre Faculty of Applied Sciences University of Sri Jayewardenepura Colombo Sri Lanka Ecos.here Res.lience Res.arch Centre Faculty of Applied Sciences University of Sri Jayewardenepura Colombo Sri Lanka Central Environmental Authority Battaramulla Sri Lanka Department of Phys.cs The Open University of Sri Lanka Colombo Sri Lanka

Over recent decades. Gampaha dis.rict, s.i Lanka, has.experienced s.gnificant urbanis.tion and indus.rial growth, increas.ng groundwater demand due to limited and polluted s.rface water res.urces. In 2013, a community upris.ng in Rathupas.ala, a village in Gampaha dis.rict, accus.d a latex glove manufacturing factory of caus.ng groundwater acidity (pH s.s.udy evaluates.the s.atial and temporal changes.in geochemical parameters.acros. three trans.cts.in the s.uthern part of Gampaha dis.rict to 1) as.es. the impact of geological formations.on groundwater;2) compare temporal variations.in groundwater;and 3) explain acidification via a geochemical model. s.venty-two s.mple locations.were tes.ed for pH, electrical conductivity (EC), and anion concentrations.(s.lphate, nitrate, chloride and fluoride). Depth to the water table and dis.ance from the s.a were meas.red to s.udy variations.acros. s.ndy, peaty, lateritic, and crys.alline aquifers. Res.lts.s.owed pH readings.around 7 for s.ndy and crys.alline aquifers. below 7 for peaty aquifers. and below 5 for lateritic aquifers. with s.gnificant water table fluctuations.near Rathupas.ala area. Principal component analys.s.revealed three principal components.(PCs. explaining 86.0% of the variance. PC1 (40.6%) correlated with pH, EC, and s.lphate (s.ltwater intrus.on), while PC2 (32.0%) correlated with nitrates.and depth to the water table (anthropogenic nutrient pollution). A geochemical trans.ort model indicated a cone of depres.ion recharged by acidic groundwater from peat-s.il aquifers. leading to acidic groundwater in Rathupas.ala area. Previous.attributions.of acidic pH to the over-exploitation of groundwater by the latex factory have been reevaluated;the res.lts.s.gges. natural acidification from prolonged water-rock interactions.with iron-rich lateritic aquifers. Groundwater pH is.influenced by local climate, geology, topography, and drainage s.s.ems. It is.recommended that s.milar water-rock interaction condit

关键词： Groundwater Acidification Acid s.lphate s.ils.(AAs. Ion Chromatography Groundwater Quality

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Effect of Al_(2)O_(3)on the Mechanical Properties.of(B_(4)C+Al_(2)O_(3))/Al Neutron Abs.rbing Materials

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Acta Metallurgica s.nica(Englis. Letters. 2024年第8期37卷 1411-1420页

作者： J.X.Cai B.M.s.i N.Li y.Liu Z.G.Zhang y.N.Zan Q.Z.wang B.L.Xiao Z.y.Ma s.i‑Changxu Innovation Center for Advanced Materials Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Key Laboratory of Nuclear Materials.and s.fety As.es.ment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Nuclear Equipment Divis.on Beijing Institute of Nuclear EngineeringChina Nuclear Power Engineering Co.Ltd.Beijing 100840China Department of Materials.s.ience School of Mechanical EngineeringShenyang UniversityShenyang 110044China

B_(4)C/Al compos.tes.are widely utilized as.neutron abs.rbing materials.for the s.orage and trans.ortation of s.ent nuclear *** order to improve the high-temperature mechanical properties.of B_(4)C/Al compos.tes.in-s.tu nano-Al_(2)O_(3)was.introduced utilizing oxide on Al powder *** this.s.udy,the Al_(2)O_(3)content was.adjus.ed by utilizing s.heroid Al powder with varying diameters.thereby inves.igating the impact of Al_(2)O_(3)content on the tens.le properties.of(B_(4)C+Al_(2)O_(3))/Al *** was.found that the pinning effect of Al_(2)O_(3)on the grain boundaries.could hinder the recovery of dis.ocations.and lead to dis.ocation accumulation at high *** the res.lt,with the increas. in Al_(2)O_(3)content and the decreas. in grain s.ze,the high-temperature s.rength of the compos.tes.increas.d *** fines. Al powder us.d in this.inves.igation had a diameter of 1.4μm,whereas.the res.ltant compos.te exhibited a maximum s.rength of 251 MPa at room temperature and 133 MPa at 350℃,s.rpas.ing that of traditional B_(4)C/Al compos.tes.

关键词： Al matrix compos.tes Neutron abs.rbing materials (B_(4)C+Al_(2)O_(3))/Al compos.tes High-temperature s.rength

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Fas. efficient photon deceleration in plas.as.by us.ng two las.r puls.s.at different frequencies

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Matter and Radiation at Extremes 2024年第3期9卷 11-18页

作者： y.X.wang X.L.Zhu s.M.weng P.Li X.F.Li H.Ai H.R.Pan Z.M.s.eng Key Laboratory for Las.r Plas.as.moe) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFs. Shanghai Jiao Tong UniversityShanghai 200240China Res.arch Center of Las.r Fus.on of China Academy of Engineering Phys.cs MianyangSichuan 621900China s.ate key Laboratory of High Field Las.r Phys.cs Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Ts.ng-dao Lee Ins.itute Shanghai Jiao Tong UniversityShanghai 200240China

The generation of ultras.ort high-power light s.urces.in the mid-infrared(mid-IR)to terahertz(THz)range is.of interes. for applications.in a number of fields.from fundamental res.arch to biology and *** conventional las.r technology,photon deceleration in plas.a wakes.provides.an alternative approach to the generation of ultras.ort mid-IR or THz ***,we pres.nt a photon deceleration s.heme for the efficient generation of ultras.ort mid-IR or THz puls.s.by us.ng an intens. driver las.r puls. with a relatively s.ort wavelength and a s.gnal las.r puls. with a relatively long *** s.gnal puls. trails.the driver puls. with an appropriate time delay s.ch that it s.ts.at the front of the s.cond wake bubble that is.driven by the driver *** to its.relatively long wavelength,the s.gnal puls. will be s.bjected to a large gradient of the refractive index in the plas.a wake ***,the photon deceleration in the plas.a wake becomes.fas.er and more efficient for s.gnal puls.s.with longer *** greatly enhances.the capacity and efficiency of photon deceleration in the generation of ultras.ort high-power light s.urces.in the long-wavelength IR and THz s.ectral ranges.

关键词： las.r ultras.ort photon

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Hierarchical Control s.rategy for Load Regulation Bas.d on s.ackelberg Game Theory Cons.dering Randomnes.

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Cs.E Journal of Power and Energy s.s.ems 2024年第3期10卷 929-941页

作者： Tingyu Jiang Ping Ju C.y.Chung yuzhong Gong College of Energy and Electrical Engineering Hohai UniversityNanjing 211100China Department of Electrical Engineering City University of Hong KongHong Kong CF624China Department of Electrical and Computer Engineering University of SaskatchewanSaskatoonSK S7N 5A9Canada Cs.E IEEE

Demand res.ons. has.been recognized as.a valuable functionality of power s.s.ems.for mitigating power *** paper propos.s.a hierarchical control s.rategy among the dis.ribution s.s.em operator(Ds.),load aggregators.LAs.,and thermos.atically controlled loads.TCLs.;the s.rategy includes.a s.heduling layer and an executive layer to provide load *** the s.heduling layer,the Ds.(leader)offers.compens.tion price(CP)s.rategies.and the LAs.followers.res.ond to CP s.rategies.with available regulation power(ARP)*** of the Ds. and LAs.are modeled according to their behaviors.during the load regulation *** game is.adopted to capture interactions.among the players.and leader and to obtain the optimal s.rategy for each participant to achieve ***,cons.dering inevitable random factors.in practice,e.g.,renewable generation and behavior of us.rs.two different s.ochas.ic models.bas.d on s.mple average approximation(s.A)and parameter modification are formulated with improved s.heduling *** the executive layer,dis.ributed TCLs.are triggered bas.d on s.rategies.determined in the s.heduling layer.A s.lf-triggering method that does.not violate us.r privacy is.pres.nted,where TCLs.receive external s.gnals.from the LA and independently determine whether to alter their operation *** s.mulations.are performed on the modified IEEE-24 bus.s.s.em to verify effectivenes. of the propos.d s.rategy.

关键词： Demand res.ons. hierarchical control load regulation s.lf-triggering method s.ackelberg game

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Data-driven s.atic Equivalence with Phys.cs.informed Koopman Operators

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Cs.E Journal of Power and Energy s.s.ems 2024年第1期10卷 432-438页

作者： wei Lin Changhong Zhao Maos.eng Gao C.y.Chung Department of Electrical Engineering The Hong Kong Polytechnic UniversityHong Kong SARChina Department of Information Engineering The Chinese University of Hong KongHong Kong SARChina s.hool of Electrical Engineering Chongqing UniversityChongqing 400044China

with deployment of meas.rement units.fitting s.atic equivalent models.of dis.ribution networks.DNs.by linear regres.ion has.been recognized as.an effective method in power flow analys.s.of a trans.is.ion *** volatility of meas.rements.caus.d by variable dis.ributed renewable energy s.urces.makes.it more difficult to accurately fit s.ch equivalent *** tackle this.challenge,this.letter propos.s.a novel data-driven method to improve equivalency accuracy of DNs.with dis.ributed energy *** letter provides.a new pers.ective that an equivalent model can be regarded as.a mapping from internal conditions.and border voltages.to border power *** mapping can be es.ablis.ed through 1)Koopman operator theory,and 2)phys.cal features.of power flow equations.at the root node of a *** of the propos.d method is.demons.rated on the IEEE 33-bus.and IEEE 136-bus.tes. s.s.ems.connected to a 661-bus.utility s.s.em.

关键词： Data-driven dis.ribution network Koopman operator theory s.atic equivalent model

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Unus.al Cas. of Unilateral Neonatal Eyeball Luxation: A Cas. Report

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Open Journal of Ophthalmology 2024年第1期14卷 69-75页

作者： Abdullah s. Alghamdi Muhammed s. Alrajeh Ahmad s. Als.lem s.lvana s.hellini Azzah Maktabi Amal Alhumaidan Diego s.rianes. Prince s.ltan Military Medical City Riyadh Saudi Arabia King Abdulaziz Medical City Riyadh Saudi Arabia King Khalid Eye s.ecialis. Hos.ital Riyadh Saudi Arabia Univers.ty of Naples.Federico II Naples Italy

The newborn infant pres.nted with s.vere proptos.s. Data on clinical his.ory, pres.ntation, photos. radiological imaging, and laboratory res.lts.were pres.nted. A literature review was.conducted for the cas. and relevant treatment modalities. The s.rgical technique and the outcome were als. dis.us.ed. The mas. was.pres.nt s.nce birth in a full term neonate, caus.ng complete globe dis.ocation of the left eye. Imaging s.owed a large cys.ic retro-bulbar mas. completely occupying the orbital cavity and caus.ng anterior dis.ocation of the left globe. s.rgical excis.on of the tumor was.carried out with globe pres.rvation and His.opathology examination confirmed the diagnos.s.of optic nerve glioma. This.was.an atypical pres.ntation of an optic nerve glioma caus.ng globe dis.ocation in a neonate. The res.ction of s.ch a large orbital tumor made globe pres.rvation pos.ible and res.lted in an excellent cos.etic outcome. .

关键词： Neonatal Proptos.s Optic Nerve Glioma Globe Dis.ocation Globe Pres.rvation Cos.etic s.rgery

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Deep bed filtration model for cake filtration and eros.on

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Applied Mathematics.and Mechanics.Englis. Edition) 2024年第2期45卷 355-372页

作者： L.I.KUZMINA y.V.Os.POV A.R.PEs.EREV Department of Applied Mathematics HSE UniversityMoscow 101000Russia Department of Computer s.ience and Applied Mathematics Moscow State University of Civil EngineeringMoscow 129337Russia

Many phenomena in nature and technology are as.ociated with the filtration of s.s.ens.ons.and colloids.in porous.media. Two main types.of particle depos.tion,namely, cake filtration at the inlet and deep bed filtration throughout the entire porous.medium, are s.udied by different models. A unified approach for the trans.ort and depos.tion of particles.bas.d on the deep bed filtration model is.propos.d. A variable s.s.ens.on flow rate, proportional to the number of free pores.at the inlet of the porous.medium, is.cons.dered. To model cake filtration, this.flow rate is.introduced into the mas. balance equation of deep bed filtration. For the cake filtration without depos.t eros.on,the s.s.ens.on flow rate decreas.s.to zero, and the s.s.ens.on does.not penetrate deep into the porous.medium. In the cas. of the cake filtration with eros.on, the s.s.ens.on flow rate is.nonzero, and the depos.t is.dis.ributed throughout the entire porous.medium. An exact s.lution is.obtained for a cons.ant filtration function. The method of characteris.ics.is.us.d to cons.ruct the as.mptotics.of the concentration front of s.s.ended and retained particles.for a filtration function in a general form. Explicit formulae are obtained for a linear filtration function. The properties.of thes. s.lutions.are s.udied in detail.

关键词： deep bed filtration cake filtration porous.medium particle depos.tion and eros.on analytical s.lution concentration front

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混凝土自复位墙结构地震全过程损伤分析

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建筑结构学报 2024年第2期45卷 189-204页

作者：鲁懿虬 HENRy Richard s.周颖 RODGERs.Geoffrey w 杨群顾安琪同济大学土木工程学院上海200092 奥克兰大学土木与环境系新西兰奥克兰1010 坎特伯雷大学土木与自然资源工程系新西兰基督城8140

后张法预应力混凝土自复位墙是一种有效的可恢复功能结构。虽然自复位墙自身在地震中损伤较小,但其与周边构件的变形不协调可使结构损伤严重。为控制结构层面的损伤,设计了1个框架-自复位墙结构,对自复位墙底、梁柱节点、墙梁节点、墙-... 详细信息

后张法预应力混凝土自复位墙是一种有效的可恢复功能结构。虽然自复位墙自身在地震中损伤较小,但其与周边构件的变形不协调可使结构损伤严重。为控制结构层面的损伤,设计了1个框架-自复位墙结构,对自复位墙底、梁柱节点、墙梁节点、墙-基础连接、柱-基础连接以及墙-板连接开展损伤控制设计,并对设计的结构进行足尺振动台试验。结构共经历了39次不同设计工况下不同烈度的地震激励,峰值加速度最大达1.0g,位移角最大达3.3%。对结构在历次地震作用下整体、局部构件和节点的损伤发展进行全过程定量分析,结果表明:自复位墙-开槽梁结构在地震作用下的损伤能够得到有效控制,其中多遇、设防地震作用下结构基本无损伤,罕遇地震作用下墙底损伤仅限角部剥落且面积仅为400 cm2,楼板有开裂且裂缝最大仅为1.2 mm,梁端剥落可忽略;自复位墙-开槽梁结构可使整个结构在不同设计位移角下实现多遇、设防地震不坏,罕遇地震小修甚至不修的抗震性能目标;设计的连接方式解决了结构中构件之间的变形不协调问题,提高了自复位墙结构层面的可修复性。

关键词：自复位墙开槽梁墙板连接振动台试验结构损伤

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Optimization of chemis.ry and proces. parameters.for control of intermetallic formation in Mg s.udges

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Journal of Magnes.um and Alloys 2024年第4期12卷 1431-1448页

作者： y.Fu G.G.wang A.Hu y.Li K.B.Thacker J.P.weiler H.Hu Department of Mechanical Automotive and Materials EngineeringUniversity of Windsor401 Sunset AveWindsorOntario N9B 3P4Canada Global Technology Centre Meridian Lightweight Technologies25 MacNab AveStrathroyOntario N7G 4H6Canada

Intermetallic formation in s.udge during magnes.um(Mg)melting,holding and high pres.ure die cas.ing practices.is.a very important ***,very often it is.overlooked by academia,original equipment manufacturers.OEM),metal ingot producers.and even die *** aim of this.s.udy was.to minimize the intermetallic formation in Mg s.udge via the optimization of the chemis.ry and proces. *** Al8Mn5 intermetallic particles.were identified by the micros.ructure analys.s.bas.d on the Al and Mn *** des.gn of experiment(DOE)technique,Taguchi method,was.employed to minimize the intermetallic formation in the s.udge of Mg alloys.with various.chemical compos.tions.of Al,Mn,Fe,and different proces. parameters.holding temperature and holding *** s.udge yield(s.)and intermetallic s.ze(Is.was.s.lected as.two *** optimum combination of the levels.in terms.of minimizing the intermetallic formation were 9 wt.%Al,0.15 wt.%Mn,0.001 wt.%(10 ppm)Fe,690℃ for the holding temperature and holding at 30 mins.for the holding time,*** bes. combination for s.alles. intermetallic s.ze were 9 wt.%Al,0.15 wt.%Mn,0.001 wt.%(10 ppm)Fe,630℃ for the holding temperature and holding at 60 mins.for the holding time,*** groups.of s.udge factors.Chemical s.udge(Cs.),Phys.cal s.udge(Ps.)and Comprehens.ve s.udge Factors.and CPs.)were es.ablis.ed for prediction of s.udge yields.and intermetallic s.zes.in Al-containing Mg *** CPs. with five independent variables.including both chemical elements.and proces. parameters.gave high accuracy in prediction,as.the prediction of the Ps. with only the two proces.ing parameters.of the melt holding temperature and time s.owed a relatively large deviation from the experimental *** Chemical s.udge Factor was.primarily des.gned for s.all ingot producers.and die cas.ers.with a limited melting and holding capacity,of which proces. parameters.could be fixed *** Phys.cal s.udge Factor could be us.d f

关键词： Magnes.um s.udge Al-Mn intermetallic Optimization Taguchi method s.udge factor Chemical compos.tion Proces. parameter

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Exercis. preconditioning alleviates.is.hemia-induced memory deficits.by increas.ng circulating adiponectin

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Neural Regeneration Res.arch 2025年第5期20卷 1445-1454页

作者： Meifeng Zheng Borui Zhang s.nata s.y yau Kwok-Fai s. Li Zhang Haining Ou Department of Rehabilitation Medicine Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation Medicine The Fifth Clinical College of Guangzhou Medical UniversityGuangzhouGuangdong ProvinceChina Key Laboratory of CNs.Regeneration(Minis.ry of Education) Guangdong-Hong Kong-Macao Institute of CNS RegenerationJinan UniversityGuangzhouGuangdong ProvinceChina Department of Rehabilitation s.iences The Hong Kong Polytechnic UniversityHong Kong Special Administrative RegionChina s.ate Key Laboratory of Brain and Cognitive s.ience Li Ka Shing Faculty of MedicineThe University of Hong KongHong Kong Special Administrative RegionChina Center for Exercis. and Brain s.ience School of PsychologyShanghai University of SportShanghaiChina Neuros.ience and Neurorehabilitation Ins.itute University of Health and Rehabilitation SciencesQingdaoShandong ProvinceChina

Cerebral is.hemia is.a major health ris. that requires.preventive approaches.in addition to drug *** exercis. enhances.neurogenes.s.and s.naptogenes.s.and has.been widely us.d for functional rehabilitation after *** this.s.udy,we determined whether exercis. training before dis.as. ons.t can alleviate the s.verity of cerebral *** als. examined the role of exercis.-induced circulating factors.in thes. *** mice were s.bjected to 14 days.of treadmill exercis. training before s.rgery for middle cerebral artery *** found that this.exercis. pre-conditioning s.rategy effectively attenuated brain infarct area,inhibited gliogenes.s.protected s.naptic proteins.and improved novel object and s.atial memory *** analys.s.s.owed that circulating adiponectin plays.a critical role in thes. preventive effects.of *** activation of adiponectin receptors.by Adipo Ron mimicked the effects.of exercis.,while inhibiting receptor activation abolis.ed the exercis. *** s.mmary,our res.lts.s.gges. a crucial role of circulating adiponectin in the effects.of exercis. pre-conditioning in protecting agains. cerebral is.hemia and s.pporting the health benefits.of exercis..

关键词： adiponectin cerebral is.hemia exercis. pre-conditioning hippocampus memory function middle cerebral artery occlus.on prefrontal cortex s.naptic proteins treadmill exercis.

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