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Froth flotati.n of scheeli.e – A revi.w

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i.ternati.nal Journal of Mi.i.g Sci.nce and Technology 2018年第3期28卷 373-384页

作者： Nathali. kupka Marti. Rudolph Helmholtz Zentrum Dresden Rossendorf (HZDR) Helmholtz Institute Freiberg for Resource Technology (HIF)

Froth flotati.n of scheeli.e has regai.ed new focus si.ce the 2010s and research regardi.g floatabi.i.y and reagents has made great progress over the years. The mai. objecti.e was and remai.s the selecti.e flotati.n of scheeli.e from other calci.m-beari.g mi.erals, i. parti.ular calci.e, fluori.e and apati.e. Due to si.i.ar properti.s, most attempts have li.i.ed success or only speci.i. appli.ati.n(li.ked to a type of ore or a locati.n). Thi. arti.le ai.s at revi.wi.g all general physi.al-chemi.al i.formati.n on froth flotati.n of scheeli.e, i.cludi.g electroki.eti. properti.s, i.fluence of p H and already exi.ti.g reagents as well as ones sti.l under exami.ati.n. i. appears that chelati.g or mi.ed collectors and modi.i.d versi.ns of sodi.m si.i.ate and quebracho hold great promi.e for scheeli.e flotati.n, whi.e the use of sai. depressants and/or promoters seems i.evi.able.

关键词： Scheeli.e Froth flotati.n Calci.m-beari.g mi.erals Selecti.i.y challenges Promi.i.g reagents

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

Coarse to Fi.e: The Role of Severe Plasti. Deformati.n i. Advanci.g Ti.ani.m-Based Medi.al i.plants - A Comprehensi.e Revi.w

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Journal of Wuhan Uni.ersi.y of Technology(Materi.ls Sci.nce) 2025年第1期40卷 295-306页

作者： Dragana R Mi.ajlovi. Bojan i.Međo i.ana Lj Cvi.ovi.-Alagi. Veljko R Djoki. Faculty of Technology and Metallurgy University of BelgradeKarnegijeva 411120 BelgradeSerbia Vi.ča i.sti.ute of Nuclear Sci.ences-Nati.nal i.sti.ute of the Republi. of Serbi. University of Belgrade11001BeogradSerbia i.novati.n Centre of the Faculty of Technology and Metallurgy Karnegijeva 411120 BelgradeSerbia

Thi. paper descri.es severe plasti. deformati.n(SPD)procedures,whi.h are uti.i.ed to form an ultrafi.e-grai.ed structure i. metalli. *** the SPD process,a soli. materi.l sample i. subjected to very hi.h loads wi.hout a si.ni.i.ant change i. sample *** the present work,the hi.h-pressure torsi.n(HPT)process,as one of the SPD techni.ues,whi.h achi.ves a hi.h degree of deformati.n and ensures refi.ement of the mi.rostructure,wi.l be di.cussed i. more *** that grai. si.e control i. accepted as a method to obtai. materi.ls wi.h desi.ed characteri.ti.s,an overvi.w of the properti.s of ultrafi.e-grai.ed ti.ani.m-based bi.materi.ls to be used i. medi.i.e i. ***,parti.ular attenti.n i. dedi.ated to the i.fluences of HPT process parameters,pri.ari.y hydrostati. pressure,and number of revoluti.ns duri.g torsi.n,on the grai. si.e and physi.al and mechani.al characteri.ti.s(modulus of elasti.i.y,mi.rohardness,and tensi.e properti.s),corrosi.n resi.tance,and bi.compati.i.i.y of the ti.ani.m-based bi.materi.ls.A revi.w of the li.erature i.di.ates that ti.ani.m-based materi.ls obtai.ed by the SPD process show i.proved mechani.al and physi.al properti.s wi.hout losi.g bi.compati.i.i.y and corrosi.n resi.tance,whi.h suggests that these methods of obtai.i.g i.plants are somethi.g that should be further developed i. the future.

关键词： hi.h-pressure torsi.n process ultrafi.e-grai.ed ti.ani.m-based materi.ls electrochemi.al anodi.ati.n physi.al properti.s mechani.al properti.s

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

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

Multi.ensory mechani.ms of gai. and balance i. Parki.son’s di.ease:an i.tegrati.e revi.w

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Neural Regenerati.n Research 2025年第1期20卷 82-92页

作者： Sti.en Roytman Rebecca Paalanen Gi.li. Carli.Uros Marusi. Prabesh Kanel Teus van Laar Ni.o i.Bohnen Department of Radi.logy University of MichiganAnn ArborMIUSA Department of Neurology University of MichiganAnn ArborMIUSA Morri. K.Udall Center of Excellence for Parki.son’s Di.ease Research University of MichiganAnn ArborMIUSA i.sti.ute for Ki.esi.logy Research Science and Research Centre KoperKoperSlovenia Department of Health Sci.nces Alma Mater Europaea–ECMMariborSlovenia Parki.son’s Foundati.n Research Center of Excellence University of MichiganAnn ArborMIUSA Department of Neurology University of GroningenUniversity Medical Center GroningenGroningenThe Netherlands Neurology Servi.e and GRECC VA Ann Arbor Healthcare SystemAnn ArborMIUSA

Understandi.g the neural underpi.ni.g of human gai. and balance i. one of the most perti.ent challenges for 21st-century translati.nal neurosci.nce due to the profound i.pact that falls and mobi.i.y di.turbances have on our agi.g *** and gai. control does not happen automati.ally,as previ.usly beli.ved,but rather requi.es conti.uous i.volvement of central nervous *** effecti.ely exert control over the body,the brai. must i.tegrate multi.le streams of sensory i.formati.n,i.cludi.g vi.ual,vesti.ular,and somatosensory *** mechani.ms whi.h underpi. the i.tegrati.n of these multi.ensory si.nals are the pri.ci.al topi. of the present *** multi.ensory i.tegrati.n theori.s focus on how fai.ure of cogni.i.e processes thought to be i.volved i. multi.ensory i.tegrati.n leads to falls i. older *** emphasi.,however,has been placed on speci.i. contri.uti.ns of i.di.i.ual sensory modali.i.s to multi.ensory i.tegrati.n processes and cross-modal i.teracti.ns that occur between the sensory modali.i.s i. relati.n to gai. and *** the present work,we revi.w the contri.uti.ns of somatosensory,vi.ual,and vesti.ular modali.i.s,along wi.h thei. multi.ensory i.tersecti.ns to gai. and balance i. older adults and pati.nts wi.h Parki.son’s *** also revi.w evi.ence of vesti.ular contri.uti.ns to multi.ensory temporal bi.di.g wi.dows,previ.usly shown to be hi.hly perti.ent to fall ri.k i. older ***,we relate multi.ensory vesti.ular mechani.ms to potenti.l neural substrates,both at the level of neurobi.logy(concerni.g posi.ron emi.si.n tomography i.agi.g)and at the level of electrophysi.logy(concerni.g electroencephalography).We hope that thi. i.tegrati.e revi.w,drawi.g i.fluence across multi.le subdi.ci.li.es of neurosci.nce,paves the way for novel research di.ecti.ns and therapeuti. neuromodulatory approaches,to i.prove the li.es of older adults and pati.nts wi.h neurodegenerati.e di.eases.

关键词： agi.g balance encephalography functi.nal magneti. resonance i.agi.g gai. multi.ensory i.tegrati.n Parki.son’s di.ease posi.ron emi.si.n tomography somatosensory vesti.ular vi.ual

Conti.uous moni.ori.g of resi.ual water content i. boi.i.g water-hydrocarbon emulsi.ns duri.g thermomechani.al dehydrati.n

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CHi.ESE JOURNAL OF CHEMi.AL ENGi.EERi.G 2024年第12期76卷 118-123页

作者： Safi.li.a, A. Khusnutdi.ov, S. Khusnutdi.ov, i. Goncharova, i. Kazan Natl Res Technol Uni. Inst Petr Chem & Nanotechnol Kazan 420015 Russia Uni. Leoben Chair Min Engn & Mineral Econ A-4820 Leoben Austria

Si.ni.i.ant waste resources are generated i. the form of water-oi. emulsi.ns. These emulsi.ns cannot be effecti.ely destroyed on an i.dustri.l scale by tradi.i.nal methods that rely on the settli.g of the aqueous phase, and therefore, they accumulate i. large quanti.i.s. Thermomechani.al dehydrati.n, based on the evaporati.n of the water phase, presents a promi.i.g process for recycli.g such waste. However, wi.hi. the framework of thermomechani.al dehydrati.n, the i.sue of opti.i.i.g energy costs for heati.g raw materi.ls and controlli.g the water content i. the product ari.es. Standard methods of determi.i.g water content under the boi.i.g condi.i.ns of hi.hly stable water-hydrocarbon emulsi.ns are characteri.ed by low effi.i.ncy, as they requi.e constant sampli.g and the i.volvement of addi.i.nal equi.ment and personnel. Consequently, thi. presents a challenge i. predi.ti.g and creati.g an automated thermomechani.al dehydrati.n process. Therefore, dynami. curves depi.ti.g changes i. the water content of these emulsi.ns, dependi.g on the temperature of the boi.i.g li.ui., have been obtai.ed. i. i. proposed to determi.e the rate of temperature i.crease (dT/dt) of the boi.i.g emulsi.n for conti.uous, real-ti.e moni.ori.g of the resi.ual water content and for recordi.g the moment of complete dehydrati.n. Achi.vi.g a boi.i.g emulsi.n temperature of 130-170 degrees C (or hi.her) and/or the rate of temperature i.crease from 3.0 to 5.5 (or above) i.di.ates the complete dehydrati.n of the emulsi.n. The proposed method can be i.plemented i. any i.dustri.l or laboratory-scale uni. for thermomechani.al dehydrati.n wi.hout si.ni.i.ant capi.al costs. i. i. based on the use of si.ple devi.es consi.ti.g of temperature sensors and a computi.g uni. for determi.i.g the temperature and rate of heati.g. (c) 2024 The Chemi.al i.dustry and Engi.eeri.g Soci.ty of Chi.a, and Chemi.al i.dustry Press Co., Ltd. All ri.hts are reserved, i.cludi.g those for text and data mi.i.g, Ai.trai.i.g, a

关键词： Conti.uous water content moni.ori.g duri.g thermomechani.al evaporati.n Fi.al dehydrati.n temperature The rate of temperature i.crease Waste treatment Emulsi.ns Process control

Hardness of Mn_2V_2O_7 thi. fi.ms and i.s i.fluenti.l factors

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i.ternati.nal Journal of Mi.erals,Metallurgy and Materi.ls 2015年第9期22卷 987-991页

作者： i. Aft i. Kari.er Department of Sci.nce Educati.n Faculty of Education Erciyes University Kayseri 38039 Turkey

Mn2V2O7 thi. fi.ms were deposi.ed onto amorphous glass substrates usi.g a chemi.al bath deposi.i.n method and di.ferent deposi.i.n ti.e. X-ray di.fracti.n （XRD） analysi. was used to defi.e the structure of the fi.ms. Thei. roughness, thi.kness, and surface properti.s were evaluated through atomi. force mi.roscopy （AFM）. The hardness of the fi.ms was measured usi.g a nanohardness tester The fi.m thi.kness, average grai. si.e, and roughness were posi.i.ely correlated wi.h each other. These three parameters were observed to i.crease wi.h the deposi.i.n ti.e. The fi.m thi.kness and average grai. si.e were i.versely correlated wi.h the hardness and rough- ness. i. addi.i.n, the number of crystalli.es per uni. area and the di.locati.n densi.y were observed to be posi.i.ely correlated wi.h the hardness and roughness. Thi. study was desi.ned to eluci.ate and formali.e the underlyi.g reasons for these relati.nshi.s.

关键词： manganese vanadate thi. fi.ms nanohardness i.fluenci.g factors