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Arcti. sea-i.e extent: No record mi.i.um i. 2023 or recent years

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Atmospheri. and Oceani. Sci.nce Letters 2025年第1期18卷 52-55页

作者： Ola M.Johannessen Tor i.Olaussen Nansen Sci.nti.i. Soci.ty BergenNorway Nansen Envi.onmental and Remote Sensi.g Center BergenNorway

Arcti. sea-i.e extent reaches i.s mi.i.um each year i. September. On 11 September 2023 the mi.i.um was 4.969 mi.li.n square ki.ometers(***^(2)). Thi. was not a record low, whi.h occurred i. 2012, when the mi.i.um was 4.175 ***^(2), 0.794 ***^(2) less than the mi.i.um i. 2023. However, the i.e extent had decreased by 0.432 ***^(2) compared wi.h 2022. Nevertheless, the summer melti.g i. 2023 was remarkably less than expected when consi.eri.g the strong heat waves i. the atmosphere and ocean, wi.h record temperatures set around the world. i. general, there i. a hi.h correlati.n between the long-term decrease i. sea-i.e extent and the i.creasi.g CO_(2) i. the atmosphere, where the i.crease of CO_(2) i. recent decades explai.s about 80% of the decrease i. sea i.e i. September, whi.e the remai.der i. caused by natural vari.bi.i.y.

关键词： Sea i.e Arcti. Mi.i.um i.e Cli.ate

Uni.i.d treatment of one-range addi.i.n theorems for i.teger and non-i.teger n-STO, -GTO and -generali.ed exponenti.l type orbi.als wi.h hyperboli. cosi.e i. posi.i.n, momentum and four-di.ensi.nal spaces

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Chi.ese Physi.s B 2012年第9期21卷 176-178页

作者： i. i. Gusei.ov Department of Physi.s Faculty of Arts and Sciences Onsekiz Mart University

Si.pler formulas are deri.ed for one-range addi.i.n theorems for the i.teger and noni.teger n generali.ed ex- ponenti.l type orbi.als, momentum space orbi.als, and hyperspheri.al harmoni.s wi.h hyperboli. cosi.e （GETO HC, GMSO HC, and GHSH HC） i. posi.i.n, momentum and four-di.ensi.nal spaces, respecti.ely. The fi.al results are expressed i. terms of one-range addi.i.n theorems of complete orthonormal sets of Ca-exponenti.l type orbi.als, Ca- momentum space orbi.als and za-hyperspheri.al harmoni.s. We noti.e that the one-range addi.i.n theorems for i.teger and noni.teger n-Slater type orbi.als and Gaussi.n type orbi.als i. posi.i.n, momentum and four di.ensi.nal spaces are speci.l cases of GETO HC, GMSO HC, and GHSH HC. The theorems presented can be useful i. the accurate study of the electroni. structure of atomi. and molecular systems.

关键词： electroni. structure generali.ed exponenti.l type orbi.als one-range addi.i.n theorems,Hartree-Fock-Roothaan equati.ns

One-Range Addi.i.n Theorems i. Terms of ψ^α -ETOs for STOs and Coulomb-Yukawa Li.e Correlated i.teracti.n Potenti.ls of i.teger and Noni.teger i.di.es

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Chi.ese Physi.s Letters 2008年第12期25卷 4240-4243页

作者： i. i. Gusei.ov Department of Physi.s Faculty of Arts and Sciences Onsekiz Mart University Canakkale Turkey

The expansi.n formulas i. terms of complete orthonormal sets of ψ^α -exponenti.l type orbi.als are establi.hed for the Slater type orbi.als and Coulomb-Yukawa-li.e correlated i.teracti.n potenti.ls of i.teger and noni.teger i.di.es. These relati.ns are used i. obtai.i.g thei. unsymmetri.al and symmetri.al one-range addi.i.n theorems. The fi.al results are especi.lly useful i. the calculati.ns of multi.entre multi.lectron i.tegrals occurri.g when Hartree-Fock-Roothaan and expli.i.ly correlated methods are employed.

关键词： orthonormal set expansi.n formula

Ai.shi. aerodynami. model esti.ati.n usi.g unscented Kalman fi.ter

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Journal of Systems Engi.eeri.g and Electroni.s 2020年第6期31卷 1318-1329页

作者： WASi. Muhammad ALi.ahsan Department of Electri.al Engi.eeri.g University of Engineering and TechnologyTaxila 47080Pakistan

An ai.shi. model i. made-up of aerostati.,aerodynami.,dynami.,and propulsi.e forces and *** others,the computati.n of aerodynami. forces and torques i. ***,wi.d tunnel experi.entati.n and potenti.l flow theory are used for thei. ***,the li.i.ati.ns of these methods pose di.fi.ulti.s i. thei. accurate *** thi. work,an onli.e esti.ati.n scheme based on unscented Kalman fi.ter(UKF)i. proposed for thei. *** proposed method i.troduces si. auxi.i.ry states for the complete aerodynami. *** uses an extended model and provi.es an esti.ate of a complete state vector along wi.h auxi.i.ry *** proposed method uses the mi.i.um auxi.i.ry state vari.bles for the approxi.ati.n of the complete aerodynami. model that makes i. computati.nally less *** esti.ati.n performance i. evaluated by developi.g a nonli.ear si.ulati.n envi.onment for Uni.ersi.y of Engi.eeri.g and Technology,Taxi.a(UETT)*** performance i. vali.�dated by performi.g the error analysi. based on esti.ati.n error and 2-σ uncertai.ty *** the same problem,the extended Kalman fi.ter(EKF)i. also i.plemented and i.s results are compared wi.h *** si.ulati.n results show that UKF successfully esti.ates the forces and torques due to the aerodynami. model wi.h small esti.ati.n error and the comparati.e analysi. wi.h EKF shows that UKF i.proves the esti.ati.n re􀅫sults and also i. i. more sui.able for the under-consi.erati.n problem.

关键词： ai.shi. unscented Kalman fi.ter(UKF) extend Kalman fi.ter(EKF) state esti.ati.n aerodynami. model esti.ati.n

PP-Ri.gs of Generali.ed Power Seri.s

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Acta Mathemati.a Si.i.a,Engli.h Seri.s 2000年第4期16卷 573-578页

作者： Javed ahsan Department of Mathemati.al Sci.nces. Ki.g Fahd Uni.ersi.y of Petroleum and Mi.erals. Dhahran 31261. Saudi.Arabi.

As a generali.ati.n of power seri.s ri.gs, Ri.enboi. i.troduced the noti.n of the ri.gs of generali.ed power seri.s. Let R be a commutati.e ri.g, and （S.≤） a stri.tly totally ordered monoi.. We prove that （1） the ri.g [[R(S.≤]] of generali.ed power seri.s i. a PP-ri.g i. and only i. R i. a PP-ri.g and every S-i.dexed subset C of B（R）（the set of all i.empotents of R） has a least upper bound i. B（R）. and （2） i. （S. ≤） also sati.fi.s the condi.i.n that 0≤s for any s∈S, then the ri.g [[R(S.≤]] i. weakly PP i. and only i. R i. weakly PP.

关键词： Ri.g of generali.ed power seri.s PP-ri.g Weakly PP-ri.g

Computati.nal Flui. Dynami.s(CFD) Modeli.g of Heat Transfer i. a Polymeri. Membrane usi.g Fi.i.e Volume Method

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Journal of Thermal Sci.nce 2016年第6期25卷 564-570页

作者： Muhammad ahsan Arshad Hussai. School of Chemi.al and Materi.ls Engi.eeri.g(SCME) National University of Sciences and Technology(NUST)

The effi.i.ncy,robustness and reli.bi.i.y of recent numeri.al methods for fi.di.g soluti.ns to flow problems have gi.en ri.e to the i.plementati.n of computati.nal flui. dynami.s(CFD) as a broadly used analysi. method for engi.eeri.g problems li.e membrane separati.n *** CFD modeli.g i. thi. study observes steady and unsteady(transi.nt) heat flux and temperature profi.es i. a polymeri.(cellulose acetate) *** study i. novel due to the i.plementati.n of user defi.ed scalar(UDS) di.fusi.n equati.n by usi.g user-defi.ed functi.ns(UDFs) i.fi.i.e volume method(FVM).Some detai.s of the FVM used by the solver are carefully di.cussed when i.plementi.g terms i. the governi.g equati.n and boundary condi.i.ns(BC).The contours of temperature due to hi.h-temperature gradi.nt are reported for steady and unsteady problems.

关键词： unsteady solver scalar polymeri. Membrane robustness governi.g carefully detai.s di.creti.ati.n

Test measurements for accuracy of absolute and relati.e GPS posi.i.ni.g

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中国有色金属学会会刊：英文版 2005年第S1期15卷 299-303页

作者： i. Havasi Uni.ersi.y of Mi.kolc Hungary

The paper, after the i.troducti.n, bri.fly outli.es the pri.ci.les of both absolute and relati.e GPS posi.i.ni.g. i. deals wi.h factors and error resources affecti.g the accuracy of these surveyi.g procedures. i. revi.ws the geodeti. determi.ati.n of a reference poi.t and a base li.e used for the test measurements. The study descri.es the completed test measurements, and on the basi. of results, i. draws the conclusi.ns for the accuracy of the i.vesti.ated surveyi.g methods. Fi.ally, consi.eri.g these accuracy measures, thei. possi.le appli.ati.n i. mi.e surveyi.g i. also menti.ned very shortly.

关键词： GPS surveyi.g methods factors and errors test measurements accuracy

Tall Bui.di.gs wi.h Dynami. Facade Under Wi.ds

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Engi.eeri.g 2020年第12期6卷 1443-1453页

作者： Fei.Di.g ahsan Kareem NatHaz Modeli.g Laboratory University of Notre DameNotre DameIN 46556USA

Burgeoni.g growth of tall bui.di.gs i. urban areas around the world i. placi.g new demands on thei. performance under *** i.volves selecti.n of the bui.di.g form that mi.i.i.es wi.d loads and structural topologi.s that effi.i.ntly transfer *** practi.e i. to search for opti.al shapes,but thi. li.i.s bui.di.gs wi.h stati. or fi.ed *** shape tai.ori.g that consi.ts of modi.yi.g the external form of the bui.di.g has shown great promi.e i. reduci.g wi.d loads and associ.ted structural moti.ns as reflected i. the desi.n of Tai.ei.101 and Burj *** these bui.di.gs,corner modi.i.ati.ns of the cross-secti.n and taperi.g along the hei.ht are *** appeali.g alternati.e i. to desi.n a bui.di.g that can adapt i.s form to the changi.g complex wi.d envi.onment i. urban areas wi.h clusters of tall bui.di.gs,i.e.,by i.plementi.g a dynami. *** leap beyond the stati. shape opti.i.ati.n,autonomous dynami. morphi.g of the bui.di.g shape i. advanced i. thi. study,whi.h i. i.plemented through a cyber–physi.al system that fuses together sensi.g,computi.g,actuati.g,and engi.eeri.g *** approach wi.l permi. a bui.di.g to i.telli.ently morph i.s profi.e to mi.i.i.e the source of dynami. wi.d load exci.ati.n,and holds the promi.e of revoluti.ni.i.g tall bui.di.gs from conventi.nal stati. to dynami. facades by taki.g advantage of the burgeoni.g advances i. computati.nal desi.n.

关键词： Tall bui.di.gs Aerodynami. shape tai.ori.g Autonomous morphi.g Cyber-physi.al system Computati.nal desi.n Surrogate modeli.g Machi.e learni.g

Orderi.g and di.orderi.g of i. si.u grown MgAl-layered double hydroxi.e and i.s effect on the structural and corrosi.n resi.tance properti.s

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i.ternati.nal Journal of Mi.erals,Metallurgy and Materi.ls 2019年第12期26卷 1570-1577页

作者： Muhammad ahsan i.bal Mi.hele Fedel Department of i.dustri.l Engi.eeri.g University of Trento

A MgAl-layered double hydroxi.e(MgAl-LDH)protecti.e fi.m was developed on AA6082 substrates vi. the i. si.u hydrothermal growth method to obtai. a di.ti.ct cauli.lower-li.e LDH structure,and coated substrates were further heat-treated i. ai. at temperatures from 100 to 250℃ to further i.prove the corrosi.n resi.tance of MgAl-LDH by taki.g advantage of the LDH memory effect;also,the effect of calci.ati.n on MgAl-LDH structural stabi.i.y and the correspondi.g corrosi.n resi.tance properti.s were *** structural characteri.ati.n of uncalci.ed and calci.ed LDH fi.ms were exami.ed usi.g scanni.g electron mi.roscopy,energy-di.persi.e spectroscopy,X-ray di.fracti.n,thermogravi.etri. analysi.,di.ferenti.l scanni.g calori.etry,and Fouri.r transform i.frared *** correspondi.g corrosi.n protecti.n effi.i.ncy of the developed coati.g was studi.d through potenti.dynami. polari.ati.n experi.ents and by electrochemi.al i.pedance *** wi.h uncalci.ed MgAl-LDH,the calci.ed fi.m showed a relati.ely lower corrosi.n current densi.y and a hi.her i.pedance value,especi.lly after heat treatment at 250℃.The fi.di.gs demonstrate that calci.ati.n strongly affects the ori.nted growth of the LDH and causes an i.crease i. the surface area and contracti.n of the basal spaci.g,whi.h i. turn caused a compact structure that substanti.lly i.fluenced the LDH corrosi.n resi.tance properti.s.

关键词： layered double hydroxi.e calci.ati.n i. si.u growth thi. fi.ms corrosi.n protecti.n