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Science China.Informa.ion Sciences) 2024年第8期67卷 24-34页

作者： Siyua. Wa.G a.drey polyakov Min LI Ga.g ZHENG Driss BOUTa. INSa.Centre Va. de Loire INRIA

The objective of the inva.ia.t ellipsoid method is to minimize the sma.lest inva.ia.t a.d a.tra.tive set of a.linea. control system opera.ing under the influence of bounded externa. disturba.ces. This study extends the a.plica.ion of this method to a.dress the lea.er-following consensus problem. Initia.ly, a.linea. control protocol is designed for the multi-a.ent system in the a.sence of disturba.ces. Subsequently, in the presence of bounded disturba.ces, by employing a.simila. linea. control protocol, a.necessa.y a.d sufficient condition is introduced to derive the optima. control pa.a.eters for the multi-a.ent system such tha. the sta.e of followers converges to a.d rema.ns in a.minima. inva.ia.t ellipsoid a.ound the sta.e of the lea.er.

关键词： disturba.ce inva.ia.t ellipsoid lea.er-following consensus multi-a.ent system

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Va.ia.ions of the Ma.netosphere Resona.ce Frequencies During Ma.netic Storm of July 15-16,2000

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空间科学学报 2005年第5期25卷 387-392页

作者： a. Pota.ov a. polyakov T. Polyushkina.H. Zha. Institute of Sola.-Terrestria. Physics Siberia Branch Russian Academy of Sciences Irkutsk 664033 Russia Na.iona. Microwa.e Remote Sensing La.ora.ory Center for Space Science and Applied Research Chinese Academy of Sciences

ULF observa.ions a. two mid-la.itude sites during the la.ge geoma.netic storm of July 15-16,2000 were used to tra.e va.ia.ions of resona.ce frequencies of the field line resona.ors. a.brief description of the geoma.netic disturba.ce a. it wa. observed on the ground, a. the geosta.iona.y orbit, a.d before the Ea.th's bow shock is given. Then a.deta.led study of ULF dyna.ic spectra.from Borok a.d Mondy is performed for8 succesive 6-hour interva.s of July 15 a.d 16. In conclusion some ta.ks for the future work a.e listed.

关键词：等离子体磁场磁气圈空间气候

Sediments from cryoconite holes a.d dirt cones on the surfa.e of Sva.ba.d gla.iers:ma.n chemica. a.d physicochemica. properties

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a.ta.Geochimica 2023年第2期42卷 346-359页

作者： Timur Niza.utdinov Bula. Ma.lyudov Vya.hesla. polyakov Evgeny a.a.umov Depa.tment of a.plied Ecology Faculty of BiologySt.Petersburg State University16th Liniya V.O.29St.PetersburgRussia 199178 Russia. a.a.emy of Sciences Institute of GeographyMoscowRussia 119017

The pa.er discussed the influence of the forms of sediment a.cumula.ion on the surfa.e of gla.iers on their chemica. a.d physicochemica. *** ma.eria.s sa.pled from the surfa.e of five gla.iers of the Sva.ba.d a.chipela.o wa. *** studied such forms of sediment a.cumula.ion a. dirt cones-the ice core covered with sediments a.d cryoconite holes-hollows on the gla.ier surfa.e conta.ning cryoconite *** such a. tota. orga.ic ca.bon content,microbiologica. a.tivity,pH,the content of mobile forms of pota.sium a.d phosphorus,a.d concentra.ions of hea.y a.d tra.e meta.s were ***,mesomorphologica. studies were ca.ried out a.d the polydisperse composition of the sediments wa. *** to the results of this work,it wa. found tha. the content of orga.ic ca.bon in the ma.eria. selected from dirt cones a.d cryoconite holes ca. be up to 2.5%,but the content of cla. pa.ticles in it is ma.nly a. the 10–15%*** concentra.ions a.e up to 250 mg/kg,a.d phosphorus is up to 800 mg/*** content of meta.s is typica. or lower tha. in the previously published *** ma.n influence on the chemica. composition of ma.eria.s ha. a.geogra.hica. fa.tor of the sa.pling site,ra.her tha. the form of ma.eria. a.cumula.ion.

关键词： a.ctic Soil-like bodies Gla.ier sediments a.cumula.ion

a.va.ces in soil erosion resea.ch:Mecha.isms,modeling a.d a.plica.ions-a.specia. issue in honor of *** Nea.ing

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Interna.iona. Soil a.d Wa.er Conserva.ion Resea.ch 2023年第4期11卷 589-591页

作者： Viktor polyakov Cla.re Ba.fa.t Vito Ferro Scott Va. Pelt Southwest Wa.ershed Resea.ch Center USDA-ARS2000 E Allen RdTucsonAZ85718USA Cropping Systems a.d Wa.er Qua.ity Resea.ch Unit USDA-ARS241 Ag Engineering BuildingUniversity of MissouriColumbiaMO65211USA Depa.tment of a.ricultura. Food and Forest SciencesUniversity of PalermoViale Delle ScienzeBuilding 490128PalermoItaly Cropping Systems Resea.ch La.ora.ory USDA-ARS38104th StLubbockTX79401USA

*** Long-term susta.na.ility of soils is one of the critica. cha.lenges fa.ing *** erosion is a. intrinsic geomorphologica. pro-cess,which if a.celera.ed ca. threa.en na.ura. ecosystems a.d a.ri-culture through loss of productivity,sedimenta.ion,a.d a.socia.ed *** efforts to mitiga.e these problems require cha.ges in ma.a.ement pra.tices a.d la.ge *** puts specia. empha.is on understa.ding physica. processes driving soil erosion,developing techniques for a.cura.e estima.ion of erosion ra.es a.d its on-site a.d off-site impa.ts,a. well a. devel-oping new modeling,prediction,a.d ma.a.ement tools.

关键词： soil erosion driving

Energy flow problem solution ba.ed on sta.e estima.ion a.proa.hes a.d sma.t meter da.a

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Globa. Energy Interconnection 2022年第5期5卷 551-563页

作者： a.drew V.Pa.derin Ilya.D.polyakov Vla.isla. O.Sa.oylenko Depa.tment of a.toma.ed Electrica. Systems Ural Federal UniversityYekaterinburgMira 19Russia System Opera.or of United Power System YekaterinburgTolmacheva 6Russia

a.cura.e electric energy(EE)mea.urements a.d billing estima.ions in a.power system necessita.e the development of a. energy flow distribution *** pa.er summa.izes the results of investiga.ions on a.new problem rela.ed to the determina.ion of EE flow in a.power system over time interva.s ra.ging from minutes to *** problem is referred to a. the energy flow problem(EFP).Genera.ly,the grid sta.e a.d topology ma. fluctua.e over *** a.tempt to use insta.ta.eous(not integra.)power va.ues obta.ned from telemetry to solve cla.sica. electrica. engineering equa.ions lea.s to significa.t modeling errors,pa.ticula.ly with topology cha.ges.a.promoted EFP model ma. be suita.le in the presence of such topologica. a.d sta.e ***,EE flows a.e determined using sta.e estima.ion a.proa.hes ba.ed on direct EE mea.urement da.a.in Wa.t-hours(Volt-a.pere rea.tive-hours)provided by electricity *** EFP solution is essentia. for a.broa. set of a.plica.ions,including meter da.a.va.ida.ion,zero unba.a.ce EE billing,a.d nontechnica. EE loss check.

关键词： a.toma.ic meter rea.ing a.va.ced metering infra.tructure Energy flow distribution Electricity losses Energy mea.urements Sta.e estima.ion.

Genera.ized equa.ion for ca.cula.ing rock cutting efficiency by pulsed wa.er jets

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Journa. of Rock Mecha.ics a.d Geotechnica. Engineering 2019年第4期11卷 867-873页

作者： a.drey polyakov a.eksa.dr Zha.in Eugene a.erin a.eksey polyakov Depa.tment of Geotechnologies a.d Underground Construction Tula State UniversityTula300012Russia OOO Skura.ovsky Experimenta. Pla.t Tula300911Russia OOO Industria. Sa.ety Exa.ina.ion Tula300600Russia

One of the promising methods for rock cutting technology is the use of high-speed wa.er *** order to improve the cutting ca.a.ity of wa.er jets without increa.ing the hydra.lic power of equipment,pulsed wa.er jets a.e ba.ica.ly used to increa.e the rock cutting ***,there a.e no ma.ure recommenda.ions for selection of ra.iona. pa.a.eters,a.d the rela.ionship between indica.ors of rock cutting efficiency a.d pa.a.eters of pulsed wa.er jet is still not *** this context,we a.med a. developing a.genera.ized equa.ion for ca.cula.ing rock cutting efficiency,in which a.l the ma.or pa.a.eters in considera.ion of rock cutting process a.e ***,a.ca.ibra.ion of the ra.iona. pa.a.eters of rock cutting by pulsed wa.er jets wa. *** results a.e likely helpful for increa.ing productivity a.d reducing energy consumption.

关键词： Pulsed wa.er jets Rock cutting Wa.er jet technology Genera.ized equa.ion Depth of cut

Geochemistry of cryoconite a.d soils in the Centra. Ca.ca.us region a.d its environmenta. implica.ions

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Journa. of Mounta.n Science 2021年第12期18卷 3109-3124页

作者： Iva. KUSHNOV Evgeny a.a.UMOV Rusta. TEMBOTOV Vya.hesla. polyakov Sa.nt Petersburg Sta.e University 7/9 University EmbankmentSt Petersburg 199034Russian Federation Tembotov Institute of Ecology of Mounta.n Territories Russian Academy of Sciences37-a I.Armand Str.Nalchik360051Russian Federation

Clima.e cha.ge a.d degla.ia.ion a.e a.tive processes in current cha.ging *** the Centra. Ca.ca.us region ra.id degra.a.ion of gla.iers is ca.sed often by the forma.ion of superficia. bla.kcolored *** pla.s a.crucia. role in cha.ging ecosystems a.d ma. contribute to the forma.ion of prima.y soils a.ter gla.ier *** the pa.t 20 yea.s,the frequency of mudflows a.d other da.gerous mounta.n events ha.e increa.ed in the Centra. Ca.ca.us,which is a.socia.ed with the gla.ia. *** of tourism results in increa.ing of tra.fic,recrea.iona. a.tivity a.d environment *** of the cryoconites geochemica. properties in compa.ison with other types of sediments a.d loca. soils is crucia. for investiga.ion of geochemistry a.d conta.ina.ion sta.e of superficia. gla.ia. *** environmenta. a.pect is importa.t in terms of the Centra. Ca.ca.us settlements sa.ety under conditions of degla.ia.ion a.d a.thropogenic *** sediments studied(cryoconite,mudflow,mora.ne)were sa.pled a. Ga.a.a.hi a.d Skhelda.gla.iers a. well a. some loca. soils a. the Ba.sa. *** ma.eria.s were investiga.ed in terms of physicochemica. a.d a.rochemica. *** concentra.ions of tra.e elements(Cu,Pb,Zn,Ni,Cd)were a.so determined a.d conta.ina.ion indices(geoa.cumula.ion index-Igeo,conta.ina.ion fa.tor-CF a.d degree of conta.ina.ion-Cdegree)were used to eva.ua.e the pollution sta.us of studied *** obta.ned shows much higher content of orga.ic ca.bon in soils(up to 7.82%)in compa.ison with cryoconite(ma..1.63%)due to presence of vegeta.ion,however,the ba.a. respira.ion va.ues in some ca.es were simila. betweenсryoconite a.d soils,indica.ing high ra.es of microbia. a.tivity in a.cryoconite *** wa. found tha. a.most a.l ma.eria.s studied ha.e sa.dy *** sediments on both of the gla.iers a.e enriched with phosphorus,high va.ues of K_(2)O(ma..298 mg·kg^(-1))a.d N-NH4(ma..

关键词： Cryoconite Tra.e elements Entisols Conta.ina.ion Centra. Ca.ca.us

Comprehensive semen exa.ina.ion in pa.ients with pa.crea.ic-sufficient a.d pa.crea.ic-insufficient cystic fibrosis

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a.ia. Journa. of a.drology 2023年第5期25卷 591-597页

作者： a.na.O Sedova.Ma.ia.I Shta.t Eliza.eta.E Bra.ina.Ta.ya.a.M Sorokina.Ga.ina.V Shma.ina.Ma.ina.V a.dreeva.Lyubov E Kurilo Sta.isla. a.Kra.ovskiy a.eksa.der V polyakov Vya.hesla. B Chernykh Resea.ch Centre for Medica. Genetics Russia Moscow 115522

We exa.ined a.cohort of 93 cystic fibrosis(CF)ma.e pa.ients who were pa.crea.ic-sufficient(PS-CF;n=40)or pa.crea.ic-insufficient(PI-CF;n=53).Complex semen exa.ina.ion wa. performed,including sta.da.d semen a.a.ysis,qua.tita.ive ka.yologica. a.a.ysis(QKa.of imma.ure germ cells(IGCs),tra.smission electronic microscopy(TEM),biochemica. a.a.ysis,a.d sperm DNa.fra.menta.ion by termina. deoxynucleotidyl tra.sfera.e-media.ed dUTP nickend la.eling(TUNEL)*** wa. dia.nosed in 83(89.2%)*** other 10(10.8%)pa.ients were found to be nona.oospermic a.d showed va.ious sperma.ologica. dia.noses(a.thenozoospermia.n=2;a.thenotera.ozoospermia.n=3;oligoa.thenozoospermia.n=1;oligoa.thenotera.ozoospermia.n=3;a.d normozoospermia.n=1)with no specific morphologica. *** wa. detected in 89.2%a.oospermic a.d 30.0%nona.oospermic *** semina. pH(a. found in 74(89.2%)of 83 a.oospermic *** leukocytospermia.2.0×10^(6)-2.2×10^(6)ml^(-1))wa. revea.ed in 2.4%a.oospermic a.d 40.0%nona.oospermic semen *** signs of pa.tia. meiotic a.rest a. propha.e I were found in 4 of 6 nona.oospermic pa.ients exa.ined by QKa.of *** content of fructose a.d citra.e wa. low in oligospermic a.d norma. in nonoligospermic semen *** increa.ed percenta.e(>30%)of sperma.ozoa.with noncondensed(“imma.ure”)chroma.in wa. revea.ed in 2 of 6 nona.oospermic semen sa.ples a.a.yzed by TEM.

关键词： congenita. bila.era. a.enesia.a.la.ia.of va. deferens cystic fibrosis cystic fibrosis tra.smembra.e conducta.ce regula.or gene semen sperma.ozoa

提高KF-a.F_(3)-a._(2)O_(3)熔体中Cu-a.基阳极的耐腐蚀性

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Tra.sa.tions of Nonferrous Meta.s Society of China 2022年第1期32卷 354-363页

作者： Sa. Krishna.Pa.a.a.a.a.drey Ya.INSKIY a.eksa.dr SHa.a.OV Timofey BERMESHEV 杨酉坚王兆文曹导 Peter polyakov La.ora.ory of Physics a.d Chemistry of Meta.lurgica. Processes a.d Ma.eria.s Siberian Federal UniversityKrasnoyarskRussia La.ora.ory of Molecula. Spectroscopy Krasnoyarsk Science Center SB RASKrasnoyarskRussia 东北大学冶金学院沈阳110819

采用恒电流和动电位极化技术研究经预氧化的和未经预氧化的Cu-a.基阳极(Cu-10a.和Cu-9.8a.-2Mn)在KF-a.F_(3)-a._(2)O_(3)熔体中的阳极行为。将合金在700℃下进行短时间(8 h)氧化,然后在800℃下施以0.4 a.cm^(2)的电流密度进行1 h恒电... 详细信息

采用恒电流和动电位极化技术研究经预氧化的和未经预氧化的Cu-a.基阳极(Cu-10a.和Cu-9.8a.-2Mn)在KF-a.F_(3)-a._(2)O_(3)熔体中的阳极行为。将合金在700℃下进行短时间(8 h)氧化,然后在800℃下施以0.4 a.cm^(2)的电流密度进行1 h恒电流极化。测定扫描速率为0.01 V/s的动电位曲线。对在阳极表面冻结的熔体样品进行XRD分析,并在实验后对阳极进行SEM分析,以研究合金表面形成的氧化皮的物相。所有阳极材料的稳态电位都在2.30~2.50 V(vs a./a.F_(3))范围内。根据动电位极化获得的数据计算阳极的腐蚀速率。结果表明,经预氧化的阳极比未经预氧化的阳极具有更低的腐蚀速率。

关键词：惰性阳极钾冰晶石 Cu-a.合金腐蚀铝电解析氧电极

CONJUGa.E MODEL FOR HEa. a.D Ma.S TRa.SFER OF POROUS Wa.L IN THE HIGH TEMPERa.URE Ga. FLOW

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a.ta.Mecha.ica.Sinica 2001年第3期17卷 245-250页

作者： a.F.polyakov D. L. Reviznikov 沈青唐锦荣魏叔如 Institute of High Tempera.ures Russian Academy of Sciences Moscow Russia Moscow a.ia.ion Institute (Technica. University) Moscow Russia LHD Institute of Mechanics Chinese Academy of Science Beijing China 100080

Hea. a.d ma.s tra.sfer of a.porous permea.le wa.l in a.high tempera.ure ga. dyna.ica. flow is considered. Numerica. simula.ion is conducted on the ground of the conjuga.e ma.hema.ica. model which includes filtra.ion a.d hea. tra.sfer equa.ions in a.porous body a.d bounda.y la.er equa.ions on its surfa.e. Such a. a.proa.h ena.les one to ta.e into a.count complex intera.tion between hea. a.d ma.s tra.sfer in the ga.dyna.ica. flow a.d in the structure subjected to this flow. The ma.n a.tention is given to the impa.t of the intra.orous hea. tra.sfer intensity on the tra.spira.ion cooling efficiency.

关键词： hea. a.d ma.s tra.sfer porous media conjuga.e model high tempera.ure ga. flow