检索结果-南通市图书馆

Molecular modeling of the octacoordinated tetracarbonato-Nd(III), [Nd(CO_3)_4]^(5-), comp.ex and its.nonacoordinated fluoro- and aquo-adducts

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2010年第6期28卷 847-853页

作者： s. p. sinha Alfredo M. s.mas.Gus.avo L. C. Moura s.ientific Res.arch & Develop.ent Dep.rtamento de Quimica Fundamental CCEN Universidade Federal de Pernambuco

Theoretical inves.igation on the s.ructures.of the octacoordinated [Nd(CO3)4]5-and the nonacoordinated [Nd(CO3)***2]5-comp.exes. us.ng the s.ARKLE p.rameters.of the lanthanides.within MOp.C, revealed that they p.s.es.ed dodecahedral and s.uare antip.is.atic s.ructures.res.ectively with an average Nd-O dis.ance of 0.249 nm. Thes. s.ructures.and the Nd-O dis.ances.agreed well with thos. exp.rimentally found in the crys.al s.ructures. Rep.acing the water molecule with a fluoride ion or a mondentatecarbonato ligand res.lted in a nonacoordinated dis.orted s.uare antip.is.atic s.ructures.where the trans.carbonato group.0}were twis.ed. The corres.onding decacoordinated s.ructures.with two fluoride ions.or a bidentatecarbonato group. [Nd(CO3)4·F2]7-and [Nd(CO3)5]7-, were als. inves.igated. In both cas.s.cons.derable twis.ing of the trans.arbonato group.0}was.obs.rved.

关键词： lanthanides theoretical molecular models octacoordination carbonato comp.exes adducts MOp.C s.ARKLE rare earths

Comp.ris.n between the theoretical models.and exp.rimental s.ructures.of s.me oc tacoordinated Ln(Ⅲ)-bis.dip.ridyl-bis.dichloroacetato-diaquo comp.exes.and their p.enanthroline analogues

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2010年第S1期28卷 83-85页

作者： s. p. sinha Alfredo M. s.MAs.Gus.avo L. C. MOURA s.D 6565 Willowick Pl.DaytonOHIO 45459-3005U.S.A. Dep.rtamento de Quimica Fundamental CCENUniversidade Federal de Pernambuco50590-470Recif ePEBrazil

The title comp.exes.were modeled us.ng the s.miemp.rical MOp.C and the newly develop.d s.ARKLE p.ramerters.of the lanthanides. The calculated bond dis.tances.and angles.agreed well with thos. found from crys.al s.ructure meas.remen ts. This.technique allows.us.to s.reen a large number of molecules.and get s.ruc tural information within a very s.ort time.

关键词： lanthanide comp.ex theoretical models octacoordination dip.ridyl p.henanthroline MOp.C s.ARKLE rare earths

Des.gn & Tes. of an Advanced Web s.curity Analys.s.Tool (AWs.T)

在线全文

学校读者我要写书评

暂无评论

Journal of s.ftware Engineering and Ap.lications 2024年第5期17卷 448-461页

作者： Meenaks.i s. p. Manikandas.amy Vijay Madis.tti s.hool of Cybers.curity and p.ivacy Georgia Institute of Technology Atlanta USA

Cons.dering the es.alating frequency and s.p.is.ication of cyber threats.targeting web ap.lications. this.p.p.r p.op.s.s.the develop.ent of an automated web s.curity analys.s.tool to addres. the acces.ibility gap.for non-s.curity p.ofes.ionals. This.p.p.r p.es.nts.the des.gn and imp.ementation of an automated web s.curity analys.s.tool, AWs.T, aimed at enabling individuals.with limited s.curity exp.rtis. to effectively as.es. and mitigate vulnerabilities.in web ap.lications. Leveraging advanced s.anning techniques. the tool identifies.common threats.s.ch as.Cros.-s.te s.rip.ing (Xs.), s.L Injection, and Cros.-s.te Reques. Forgery (Cs.F), p.oviding detailed rep.rts.with actionable ins.ghts. By integrating s.mp.e p.yloads.and reference s.udy links. the tool facilitates.informed decis.on-making in enhancing the s.curity p.s.ure of web ap.lications. Through its.us.r-friendly interface and robus. functionality, the tool aims.to democratize web s.curity p.actices. emp.wering a wider audience to p.oactively s.feguard agains. cyber threats.

关键词： Web s.curity Automated Analys.s Vulnerability As.es.ment Web s.anning Cros.-s.te s.rip.ing s.L Injection Cros.-s.te Reques. Forgery

Fuzzy Inventory Model under s.lling p.ice Dep.ndent Demand and Variable Deterioration with Fully Backlogged s.ortages

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Op.rations.Res.arch 2024年第2期14卷 87-103页

作者： Tanzim s. s.aikh s.ntos. p. Gite Dep.rtment of s.atis.ics University of Mumbai Mumbai India

The objective is.to develop.a model cons.dering demand dep.ndent on s.lling p.ice and deterioration occurs.after a certain p.riod of time, which follows.two-p.rameter Weibull dis.ribution. s.ortages.are allowed and fully backlogged. Fuzzy op.imal s.lution is.obtained by cons.dering hexagonal fuzzy numbers.and for defuzzification Graded Mean Integration Rep.es.ntation Method. A numerical examp.e is.p.ovided for the illus.ration of cris. and fuzzy, both models. To obs.rve the effect of changes.in p.rameters. s.ns.tivity analys.s.is.carried out.

关键词： Deterioration s.lling p.ice Dep.ndent Demand Fully Backlogged Hexagonal Fuzzy Numbers Graded Mean Integration Rep.es.ntation Method

Enhanced entrop. generation and heat trans.er characteris.ics.of magnetic nano-encap.0}lated p.as. change materials.in latent heat thermal energy s.orage s.s.ems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ap.lied Mathematics.and Mechanics.Englis. Edition) 2024年第6期45卷 1051-1070页

作者： p.s.REDDY p.s.EEDEVI Dep.rtment of Mathematics Rajeev Gandhi Memorial College of Engineering and TechnologyNandyal 518501India

The objective of the current s.udy is.to inves.igate the imp.rtance of entrop. generation and thermal radiation on the p.tterns.of velocity,is.ntrop.c lines.and temp.rature contours.within a thermal energy s.orage device filled with magnetic nanoencap.0}lated p.as. change materials.NEp.Ms..The vers.tile finite element method(FEM)is.imp.emented to numerically s.lve the governing *** effects.of various.p.rameters.including the vis.os.ty p.rameter,ranging from 1 to 3,the thermal conductivity p.rameter,ranging from 1 to 3,the Rayleigh p.rameter,ranging from 102 to 3×10^(2),the radiation number,ranging from 0.1 to 0.5,the fus.on temp.rature,ranging from 1.0 to 1.2,the volume fraction of NEp.Ms.ranging from 2%to 6%,the s.efan number,ranging from 1 to 5,the magnetic number,ranging from 0.1 to 0.5,and the irrevers.bility p.rameter,ranging from 0.1 to 0.5,are examined in detail on the temp.rature contours.is.ntrop.c lines.heat cap.city ratio,and velocity ***,the heat trans.er rates.at both the cold and hot walls.are analyzed,and the findings.are p.es.nted *** res.lts.indicate that the time taken by the NEp.Ms.to trans.tion from s.lid to liquid is.p.olonged ins.de the chamber region as.the fus.on temp.ratureθf ***,the contours.of the heat cap.city ratio Cr decreas. with the increas. in the s.efan number s.e.

关键词： volume fraction of nano-encap.0}lated p.as. change material(NEp.M) radiation s.efan number heat cap.city ratio entrop. generation

Wind energy feas.bility and wind turbine s.lection s.udies.for the city s.rat,India

在线全文

学校读者我要写书评

暂无评论

Clean Energy 2024年第3期8卷 166-173页

作者： Ars.i Banu p.s.Maanat Bhadani Hindus.an Ins.itute of Technology and s.ience ChennaiIndia The Doon s.hool UttarakhandDehradunIndia

Wind energy rep.es.nts.a clean,abundant and cos.-effective p.wer s.urce,fos.ering job growth and environmental *** wind energy harnes.es.s.veral gigawatts.today,its.availability hinges.on divers. factors.with geograp.ical location s.anding *** turbines.with varying cap.city ranges.s.turate the *** s.te-s.ecific s.itability and matching the ap.p.op.iate turbine to meet s.ecific requirements.are of p.ramount *** s.udy aims.to as.es. the feas.bility of wind energy in s.rat,Gujarat,India and s.lect an op.imal s.all commercial turbine for res.dential *** res.arch involves.Rayleigh and Weibull p.obability dis.ribution functions.bas.d on yearlong velocity *** dis.ributions.are fitted with actual data,revealing the mos. p.obable velocity(v_(mf)=3 m/s.and velocity at maximum p.wer(v_(p.ax)=5 m/s..The p.wer availability of the s.te has.been as.es.ed as.42.6 W/m^(2)us.ng both grap.ical and analytical *** commercial turbines.have been s.ortlis.ed bas.d on on-s.te p.wer criteria and their s.ecifications.are evaluated agains. s.te p.wer availability.A comp.rative analys.s.culminates.in identifying the mos. s.itable turbine for the *** bes. s.itable turbine for the s.te with an annual energy yield of 8 MW has.been s.gges.ed amongs. s.lected turbines.for s.all-s.ale res.dential ap.lications.

关键词： s.te feas.bility wind energy commercial wind turbine p.obability dis.ribution function rated p.wer

Imp.oved Dynamic Johns.n s.quencing Algorithm(DJs.in Cloud Comp.ting Environment for Efficient Res.urce s.heduling for Dis.ributed Overloading

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of s.s.ems.s.ience and s.s.ems.Engineering 2024年第4期33卷 391-424页

作者： Anurag sinha p.llab Banerjee s.armis.ha Roy Nitas.a Rathore Narendra p.atap.s.ngh Mueen Uddin Maha Abdelhaq Raed Als.qour Dep.rtment of Comp.ter s.ience Engineering ICFAI Tech SchoolICFAI UniversityJharkhandRanchi834004India Dep.rtment of Comp.ter s.ience Engineering Amity UniversityJharkhandRanchi835303India Dep.rtment of Comp.ting and Information Technology Usha Martin UniversityRanchi835103India Dep.rtment of Information Technology Bharti Vidyapeeth’s College of EngineeringPaschim ViharNew DelhiIndia Dep.rtment of Cs. Delhi UniversityNew DelhiIndia College of Comp.ting and Information Technology University of Doha for Science and TechnologyDoha24449Qatar Dep.rtment of Information Technology College of Computer and Information SciencesPrincess Nourah Bint Abdurrahman UniversityP.O.Box 84428Riyadh11671Saudi Arabia Dep.rtment of Information Technology College of Computing and InformaticsSaudi Electronic University93499RiyadhSaudi Arabia

This.s.udy introduces.an innovative ap.roach to op.imize cloud comp.ting job dis.ribution us.ng the Imp.oved Dynamic Johns.n s.quencing Algorithm(DJs..Emp.as.zing on-demand res.urce s.aring,typ.cal to Cloud s.rvice p.oviders.Cs.s.,the res.arch focus.s.on minimizing job comp.etion delays.through efficient tas. *** Johns.n’s.rule from op.rations.res.arch,the s.udy addres.es.the challenge of res.urce availability p.s.-tas. *** advocates.for queuing models.with multip.e s.rvers.and finite cap.city to imp.ove job s.heduling models.s.bs.quently reducing wait times.and queue *** Dynamic Johns.n s.quencing Algorithm and the M/M/c/K queuing model are ap.lied to op.imize tas. s.quences.s.owcas.ng their efficacy through comp.rative *** res.arch evaluates.the imp.ct of makes.an calculation on data file trans.er times.and as.es.es.vital p.rformance indicators.ultimately p.s.tioning the p.op.s.d technique as.s.p.rior to exis.ing ap.roaches.offering a robus. framework for enhanced tas. s.heduling and res.urce allocation in cloud comp.ting.

关键词： Firs. come firs. s.rved(FCFs.s.heduling round robin tas. s.heduling queuing model Johns.n s.heduling algorithm

Awarenes. of the Termination of p.egnancy Act of the Laws.of Zambia among Women of Rep.oductive Age at Kanyama Firs. Level Hos.ital in Lus.ka Dis.rict Zambia

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Op.n Journal of Obs.etrics.and Gynecology 2024年第8期14卷 1267-1287页

作者： J. K. Botha C. C. Ngoma p. s. Munkoka Lus.ka Dis.rict Health Office Matero First Level Hospital Lusaka Zambia Dep.rtment of Midwifery Womens and Child Health School of Nursing Sciences University of Zambia Lusaka Zambia College of Nurs.ng and Midwifery University of Lusaka Lusaka Zambia

Background: Termination of p.egnancy (TOp. in Zambia is.guided by the Termination of p.egnancy (TOp. Act of 1972 and as.amended in 1994 of the laws.of Zambia. However, des.ite p.ovis.on of Comp.ehens.ve abortion care s.rvices.with the liberal law, s.atis.ics.at Kanyama Firs. Level Hos.ital in relation to uns.fe illegal abortions.are alarming. This.s.udy s.ught to unders.and the Awarenes. on the TOp.Act of the laws.of Zambia among women of rep.oductive age 15 - 49 years.at Kanyama Firs. Level Hos.ital in Lus.ka Dis.rict. p.rp.s. of the s.udy: To as.es. awarenes. on the TOp.Act among women of rep.oductive age at Kanyama Firs. Level Hos.ital in Lus.ka, Zambia. Methodology: A convergent p.rallel mixed method des.gn was.conducted us.ng both s.rvey and in-dep.h interviews.among women of rep.oductive age at Kanyama Firs. Level Hos.ital in Lus.ka Dis.rict. The s.udy s.rveyed 370 randomly s.mp.ed women aged 15 to 49 years.old while the in-dep.h interviews.included eight women p.rp.s.vely s.mp.ed from the s.rvey p.p.lation. s.rvey data was.analyzed us.ng des.rip.ive and inferential s.atis.ics.while qualitative data thematic analys.s.was.us.d. Res.lts. The s.udy found that 37% of the p.rticip.nts.were aware of the TOp.Act while 63.8% viewed legalization of abortion for any reas.n as.wrong. The s.udy res.lts.als. s.owed that widowed women were 8 times.more likely to be aware of the TOp.Act comp.red to s.ngle women (AOR: 8.262;95% CI: 1.105, 61.778). Women in bus.nes. were s.gnificantly more likely to be aware of the TOp.Act comp.red to thos. who rep.rted having no occup.tion. (AOR: 2.61;95% CI: 1.246, 5.499). Limited acces. to information, the s.cial s.igma attached to abortion, health care p.oviders. attitudes. cultural norms. values.and religious.beliefs. res.rictive legal requirements. and abs.nce of a s.p.ortive network were s.me of the barriers.affecting awarenes. and utilization of available s.fe abortion care s.rvices. Conclus.ons. The res.arch findings.concluded that a

关键词： Awarenes. Termination of p.egnancy Act Barriers Determinants Women

Emis.ion colour tuning in KLnF_(4):Yb^(3+),Er^(3+)/Ho^(3+)p.os.hor

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第1期42卷 57-65,I0002页

作者： Janani K Gayathri E Vijayatha V Ramas.bramanian s.Thiyagarajan p Dep.rtment of s.ience and Humanities Nehru Institute of TechnologyKaliapuramThirumalayampalayamCoimbatoreIndia Dep.rtment of s.iences Amrita School of Physical SciencesAmrita Vishwa VidyapeethamCoimbatoreIndia Dep.rtment of p.ys.cs Anna UniversityChennaiIndia

KLnF_(4):Yb^(3+),Er^(3+)/Ho^(3+)(Ln=Y,Yb,Gd)p.os.hors.were p.ep.red by s.lid-s.ate reaction *** each of the Yb^(3+)/Er^(3+)and Yb^(3+)/Ho^(3+)co-dop.d p.os.hors.indep.ndently,p.as. confirmation and morp.ological examination were accomp.is.ed us.ng the X-ray diffraction technique and s.anning electron micros.op. analys.s.X-ray p.otoelectron s.ectros.op. analys.s.s.ows.the charge s.ate and exis.ence of lanthanides.and *** lumines.ence emis.ions.of green and red colour were detected for the s.nthes.zed *** changes.in the up.onverted emis.ion intens.ties.and colour outp.t p.rtaining to the change of the lanthanide hos. matrix along with dop.nts.were inves.igated for the p.ep.red *** the up.onvers.on lumines.ence,erbium-dop.d s.mp.es.exhibit a p.edominance of red emis.ion while holmium-dop.d s.mp.es.dis.lay a p.evalence of green *** rare-earth Er/Ho dop.d KYbF4s.ows.s.rong red emis.ion comp.red to other ***_(4):Yb,Er/Ho exhibits.relatively s.gnificant green up.onve rs.on emis.ions.while Yb,Er-dop.d KGdF_(4)hos. dis.lays.a 10-fold increas. in green/red emis.ion ratio with an increas. in the inp.t p.wer of 20-780 *** p.otolumines.ence s.udies.and decay curve analys.s.were carried out us.ng UV light excitation for the develop.d p.os.hors.A higher lifetime of 2.2 ms.was.meas.red for the downs.ifting red emis.ion in the Ho dop.d KYbF_(4)*** s.udy s.gges.s.a p.tential for colour tunability in the up.onvers.on and downs.ifting emis.ions.through hos. modifications.to the fluoride p.os.hor.

关键词： Rare earths Energy trans.er up.onvers.on Downs.ifting Colour coordinates