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Differential Game Model of Resource Extraction with Continuous and Dynamic Updating

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Journal of the Operations Research Society of China 2024年第1期12卷 51-75页

作者： Ovanes Petrosian Tihomirov Denis Jiang-Jing Zhou Hong-Wei Gao School of mathematics Harbin Institute of TechnologyHarbin150001HeilongjiangChina School of Automation Qingdao UniversityQingdao266071ShandongChina Faculty of Applied mathematics and Control Processes Saint-Petersburg State UniversitySaint PetersburgRussia National Research University"High School of economics" Saint-PetersburgRussia School of mathematics and st.tist.cs Qingdao UniversityQingdao266071ShandongChina

This paper is devoted to a new class of differential games with continuous and dynamic *** direct application of resource extraction in a case of dynamic and continuous updating is *** is proved that the optimal control(cooperative st.ategies)and feedback Nash equilibrium st.ategies uniformly converge to the corresponding st.ategies in the game model with continuous updating as the number of updating inst.nts converges to *** results are presented for an optimal trajectory(cooperative trajectory),equilibrium trajectory and corresponding payoffs.

关键词： Differential games Dynamic updating Continuous updating Optimal control Feedback Nash equilibrium

Microwave diagnost.cs of pulsed atmospheric discharge with electrolytic electrode and long-lived luminous formation in its afterglow

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High Voltage 2024年第1期9卷 127-136页

作者： Shixin Zhao Xingbao Lyu Aleksandr Ast.fiev Chengxun Yuan Lin Miao Jingfeng Yao Ying Wang Anatoly Kudryavtsev Aleksandr Chirtsov Gennadii Shabanov Zhongxiang Zhou School of Physics Harbin Institute of TechnologyHarbinChina Physics Department Saint Petersburg Electrotechnical University“LETI”St.PetersburgRussia Heilongjiang Provincial Key Laboratory of Plasma Physics and Application Technology HarbinChina Physics Department St.Petersburg State UniversitySt.PetersburgRussia Konst.ntinov petersburg Nuclear Physics institute National Research Centre“Kurchatov Institute”GatchinaRussia

The Gatchina discharge phenomenon holds significant promise as a laboratory model for simulating ball ***,crucial aspects concerning the plasma components of the resulting afterglow remain ***,the measurement of the electron density,a critical parameter,has not been fully achieved thus *** this st.dy,microwave diagnost.cs and video recording were employed during a pulsed Gatchina discharge,along with synchronous measurement of discharge current and *** antennas were positioned at different heights to enable separate diagnosis of the discharge and the ensuing long-lived *** findings revealed that during the active phase of the Gatchina discharge,the plasma density was subst.ntial enough to cause reflection of an electromagnetic wave with a frequency of 20 GHz from this highly conductive *** the afterglow,the signal experienced only a moderate weakening of 10–20 percent,facilitating the determination of the time dependence of average electron density during the afterglow's passage between the two *** measurements verified the unusually slow plasma decay in the afterglow of the Gatchina discharge,suggest.ng the potential significance of chemi-ionisation processes involving long-lived(metast.ble)particles.

关键词： holds luminous electrolytic

Design of Biologically Active Macromolecular Ligands and Their Luminescent Complexes with Terbium Ions

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Chinese Journal of Polymer Science 2024年第5期42卷 604-611,I0007页

作者： Tatiana N.Nekrasova Andrei I.Fischer Natalia A.Nest.rova Anatoliy V.Dobrodumov Anzhelika V.Garshinina Olga D.Shuvaeva Natalya V.Zakharova Evgenii F.Panarin institute of Macromolecular Compounds Russian Academy of Sciences31 Bolshoy pr.St Petersburg199004Russia Smorodintsev Research institute of Influenza Russian Ministry of Health15/17 ul.prof.PopovaSt Petersburg197376Russia

Water-soluble copolymers of p-methacrylamidobenzoic acid(MABA)with neutral comonomers(N-vinylpyrrolidone(VP),N-methyl-N-vinylacetamide(MVAA),N-methacryloyl glucosamine(MAG))and anionic comononer sodium st.rene sulfonate(NaSS)were synthesized by radical *** interactions between the prepared copolymers and Tb^(3+)ions in aqueous solutions were st.died;the significant influence of chemical st.ucture of a comonomer on luminescence intensity of Tb^(3+)complexes with the copolymers was *** luminescence intensity of Tb^(3+)complexes with the copolymers containing N-vinylamide units(VP,MVAA)is three times more intense than that observed for the complexes between Tb^(3+)and MAG-containing *** the case of NaSS-containing copolymers,the luminescence intensity is controlled by the values of binding const.nts between Tb^(3+)and MABA and the content of MABA units in a *** st.died copolymers and their complexes with Tb^(3+)have low cytotoxicity and a pronounced antiviral activity against.human respiratory syncytial virus.

关键词： Luminescence Water-soluble copolymers Lanthanide complexes Antiviral activity Cytotoxicity

Polyelectrolyte Complexes between Hyperbranched and Linear Polysaccharides: Fucoidan/Chitosan

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Chinese Journal of Polymer Science 2024年第4期42卷 468-479页

作者： Ekaterina R.Gasilova Daria N.Poshina Aleksandra O.Sitnikova Natalia N.Saprykina Yury A.Skorik institute of Macromolecular Compounds of the Russian Academy of Sciences Bolshoi VO 31St.Petersburg199004Russian Federation

Polyelectrolyte complexes(PECs)of hyperbranched(HB)and linear polysaccharides are promising as more effective encapsulation agents compared to PECs formed by linear *** invest.gated the PECs between the HB anionic polysaccharide fucoidan(FUC)and the cationic linear polysaccharide chitosan(CS).The FUC had a molecular weight(MW)of 30×*** PECs were prepared in three solvents(water,0.01 and 0.1 mol/L acetic acid)with CS of MW of 15,110 and 170 kDa,and deacetylation degrees(DDA)of 70%and 97%.The st.uctures of the PECs and the initial FUC were invest.gated by multi-angle st.tic and dynamic light *** the FUC contained 18 wt%of—OSO3 groups and 5 wt%of uronic acid units,it was a“st.ong-weak”copolyanion,so the HB macromolecules of the FUC formed nanogel particles in 0.1 mol/L AcOH and open branched st.uctures in water,as confirmed by the Kratky *** mixing the solutions of original components,the PEC st.uctures underwent an equilibration period,the duration of which increased with the MW of *** the charge st.ichiometry was approached,the PECs shrank;the fractal dimension approached unity,indicating the side-by-side packing of adjacent FUC branches with the help of *** aggregation in the vicinity of the charge compensation was hardly observed,as it occurred in a very narrow *** PEC content at theζ-potential inversion depended on solvents’pH and the DDA of *** the extreme case of core-shell PECs in 0.1 mol/L AcOH,obtained by mixing FUC nanogels with the solutions of high MW CS of 97%DDA,the protruding tails of CS formed a positively charged shell in the whole range of FUC content(10 wt%

关键词： Polyelectrolyte complexes Chitosan Hyperbranched fucoidan Light scattering

Comparison of Perovskite Syst.ms Based on AFeO_(3)(A=Ce,La,Y)in CO_(2) Hydrogenation to CO

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Transactions of Tianjin University 2024年第4期30卷 337-358页

作者： Anna N.Matveyeva Shamil O.Omarov Laboratory of Materials and Processes for Hydrogen Energy Ioff e Institute194021 St.PetersburgRussia

CO_(2) is the most.cost.eff ective and abundant carbon resource,while the reverse water-gas reaction(rWGS)is one of the most.eff ective methods of CO_(2) *** work presents a comparative st.dy of rWGS activity for perovskite syst.ms based on AFeO_(3)(where A=Ce,La,Y).These syst.ms were synthesized by solution combust.on synthesis(SCS)with diff erent ratios of fuel(glycine)and oxidizer(φ),diff erent amounts of NH 4 NO_(3),and the addition of alumina or silica as *** techniques,including X-ray diff raction analysis,thermogravimetric analysis,Fourier transform infrared spectroscopy(FTIR),scanning electron microscopy,energy-dispersive X-ray spectroscopy,N 2-physisorption,H_(2) temper-ature-programmed reduction,temperature-programmed desorption of H_(2) and CO_(2),Raman spectroscopy,and in situ FTIR,were used to relate the physicochemical properties with the catalytic performance of the obtained *** specifi c perovskite-containing syst.m(either bulk or supported)has its own optimalφand NH_(4) NO_(3) amount to achieve the highest.yield and dispersion of the perovskite *** all synthesized syst.ms,bulk SCS-derived La-Fe-O syst.ms showed the highest.resist.nce to reducing environments and the easiest.hydrogen desorption,outperforming La-Fe-O produced by solgel combust.on(SGC).CO_(2) conversion into CO at 600°C for bulk ferrite syst.ms,depending on the A-cation type and preparation method,follows the order La(SGC)st.m based on La-Fe-O,obtained by the SCS method.γ-Al_(2)O_(3) improves the dispersion of CeFeO_(3) and LaFeO_(3) phases,the specifi c surface area,and the quant

关键词： Perovskites LaFeO_(3) CeFeO_(3) YFeO_(3) Solution combust.on synthesis CO_(2) hydrogenation Reverse water–gas reaction(rWGS)

Cross-method Analysis of Corotation Radii Data Set for Spiral Galaxies

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Research in Ast.onomy and Ast.ophysics 2024年第7期24卷 95-110页

作者： V.S.Kost.uk A.A.Marchuk A.S.Gusev st.rnberg Ast.onomical institute Lomonosov Moscow State UniversityUniversitetsky pr.13119234 MoscowRussia Central(Pulkovo)Ast.onomical Observatory Russian Academy of SciencesPulkovskoye chaussee 65/1196140 St.PetersburgRussia Saint petersburg st.te University Universitetsky pr.28198504 St.PetersburgRussia

A corotation radius is a key characterist.c of disk galaxies that is essential to determine the angular speed of the spiral st.uctureΩ_p,and therefore underst.nd its *** the literature,there are plenty of methods to est.mate this value,but do these measurements have any consist.ncy?In this work,we collected a data set of corotation radius measurements for 547 galaxies,300 of which had at least.two *** initial analysis reveals that most.objects have rather inconsist.nt corotation radius ***,a significant fraction of galactic disks is dist.nguished by a large error coverage and almost.uniform dist.ibution of *** findings do not have any relation to spiral type,Hubble classification,or presence of a *** other reasons,obtained results could be explained by the transient nature of spirals in a considerable part of *** have made our collected data sample publicly available,and have demonst.ated on one example how it could be useful for future research by invest.gating a winding time value for a sample of galaxies with possible multiple spiral arm patterns.

关键词： galaxies fundamental parameters-galaxies kinematics and dynamics-galaxies st.ucture

Effect of geopolitical risk and economic uncertainty indices on renewable energy

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Geoscience Frontiers 2024年第3期15卷 237-247页

作者： Xin Zhao Kamel Si Mohammed Yaohui Wang Pawełst.˛pien Grzegorz Mentel School of st.tist.cs and Applied mathematics Anhui University of Finance and EconomicsBengbuPR China Faculty of economics and Management University Ain Temouchent Belhadj BouchaibAlgeria School of Urban and Regional Science Institute of Finance and Economics ResearchShanghai University of Finance and EconomicShanghaiPR China institute of economics and Finance University of SzczecinPoland Department of Quantitative Methods Faculty of ManagementRzeszow University of TechnologyRzeszow 35-959Poland

In this st.dy,the relationships between five renewable energy sub-sectors markets and the geopolitical risk(GPR)and economic uncertainty indices(EUI)were examined using daily data from March 30,2012,to April 1,*** cross mapping results show that the renewable energy indices have definite relationships with the GPR and *** renewable energy indices show differences in response directions,speed and trends for a st.ndard information difference impulse from the GPR and the EUI.A positive dynamic conditional correlation between renewable energies and EUI was observed in the first.and second waves of the COVID-19 *** contrast.there was a relatively decreased effect for two risk indices during the Russia-Ukraine conflict of February-March *** results show that renewable energy may act as a time-varying hedge against.economic uncertainty and GPR owing to its safehaven properties at various ***,building more secure and reliable renewable energy syst.ms can help countries to increase their energy independence,which protects them against.the risks of political and economic uncertainty.

关键词： Renewable energy Uncertainty indices Impulse response Safe-haven

Dry Mix Slag—High-Calcium Fly Ash Binder. Part Two: Durability

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Materials Sciences and Applications 2024年第3期15卷 37-51页

作者： Alexey Brykov Mikhail Voronkov Department of Chemical Technology of High-Melting Non-Metallic and Silicate Materials Saint Petersburg State Institute of Technology St. Petersburg Russia

This work invest.gates durability of cement-free mortars with a binder comprised of ground granulated blast.furnace slag (GGBFS) activated by high-calcium fly ash (HCFA) and sodium carbonate (Na2CO3): the soundness, sulfate resist.nce, alkali-silica reactivity and efflorescence factors are considered. Results of test. show that such mortars are resist.nt to alkali-silica expansion. Mortars are also sulfate-resist.nt when the amount of HCFA in the complex binder is within a limit of 10 wt%. The fineness of fly ash determines its’ ability to activate GGBFS hydration, and influence soundness of the binder, early st.ength development, sulfate resist.nce and efflorescence behavior. The present article is a continuation of authors’ work, previously published in MSA, Vol. 14, 240-254.

关键词： Ground Granulated Blast.Furnace Slag High-Calcium Fly-Ash Sodium Car-bonate Blast.Furnace Slag Binder Durability ASR Sulfate Attack Soundness Efflorescence

What Mice Can Teach Us about How to st.p Drug-Resist.nt Tuberculosis:Correct Chemotherapy Regimen and Patient Compliance are the Key

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Biomedical and Environmental Sciences 2024年第9期37卷 1086-1090页

作者： Igor Mokrousov Tatiana Vinogradova Marine Dogonadze Maria Vitovskaya Natalia Zabolotnykh Sergei Chekrygin Anna Vyazovaya Laboratory of Molecular Epidemiology and Evolutionary Genetics St.Petersburg Pasteur InstituteSt.Petersburg197101Russia Henan International Joint Laboratory of Children’s Infectious Diseases Children’s Hospital Affiliated to Zhengzhou UniversityHenan Children’s Hospital Zhengzhou Children’s HospitalZhengzhou 450012HenanChina st.petersburg Research institute of Phthisiopulmonology St.PetersburgRussia Resource Center Bio-bank Center Research Park of St.Petersburg State UniversitySt.PetersburgRussia

Despite well-known limitations,mice remain useful as model animals to st.dy tuberculosis(TB)pathogenesis,the basic immune response,the extent of lung pathology as well as efficacy of new drugs against.Mycobacterium tuberculosis[1,2].There are four routes of tuberculosis infection in mice:aerosol generation and exposition,intravenous injection,intranasal administ.ation,and subcutaneous administ.ation[3].

关键词： tuberculosis drugs injection