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Investigation of nonlinear effects in doppler reflectometry using full-wave synthetic diagnostics

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Plasma Science and Technology 2020年第6期22卷 1-7页

作者： O l KRUTKIN A B AlTUKHOV A d gURCHeNKO e Z gUSAKOV S HeURAUX M A IRZAK l A eSIPOV T P KIVINIeMI C leCHTe S leeRINK P NISKAlA g ZAdVITSKIY Ioffe Institute St PetersburgRussia Institut Jean lamour UMR 7198 CNRS Univ.de LorraineBP 50840F-54011 NancyFrance Aalto University FI-02150 EspooFinland Institute of Interfacial Process eng.and Plasma Technology D-70569 StuttgartGermany

In this work,doppler reflectometry(dR)and radial correlation dR(RCdR)nonlinear scattering effects are studied using full-wave modeling with a set of representative FT-2 tokamak turbulence as *** of the RCdR correlation function and widening of the dR poloidal wavenumber spectrum are *** effect on the dependence of the dR signal frequency shift on the probing wavenumber is found,namely,this dependence‘linearizing’in the nonlinear scattering *** effects are shown to be weaker for O-mode probing than for X-mode probing,while a faster transition to nonlinear regime is demonstrated for RCdR compared to dR in both probing scenarios.

关键词： reflectometry numerical modeling full-wave modeling

A comprehensive investigation on nonlinear vibration and bending characteristics of bio-inspired helicoidal laminated composite structures

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Applied Mathematics and Mechanics(english edition) 2025年第1期46卷 81-100页

作者： S.SAURABH R.KIRAN d.SINgH R.VAISH V.S.CHAUHAN School of Mechanical and Materials engineering Indian Institute of Technology Mandi

Bio-inspired helicoidal composite laminates, inspired by the intricate helical structures found in nature, present a promising frontier for enhancing the mechanical properties of structural designs. Hence, this study provides a comprehensive investigation into the nonlinear free vibration and nonlinear bending behavior of bio-inspired composite plates. The inverse hyperbolic shear deformation theory(IHSdT) of plates is employed to characterize the displacement field, with the incorporation of green-lagrange nonlinearity. The problem is modeled using the C0finite element method(FeM), and an in-house code is developed in the MATlAB environment to solve it numerically. Various helicoidal layup configurations including helicoidal recursive(HR), helicoidal exponential(He), helicoidal semi-circular(HS), linear helicoidal(lH), and Fibonacci helicoidal(FH)with different layup sequences and quasi-isotropic configurations are studied. The model is validated, and parametric studies are conducted. These studies investigate the effects of layup configurations, side-to-thickness ratio, modulus ratios, boundary conditions, and loading conditions at different load amplitudes on the nonlinear vibration and nonlinear bending behaviors of bio-inspired composite plates. The results show that the laminate sequence exerts a substantial impact on both nonlinear natural frequencies and nonlinear bending behaviors. Moreover, this influence varies across different side-to-thickness ratios and boundary conditions of the bio-inspired composite plate.

关键词： Inverse problems

Monte Carlo generator photon jets used for luminosity at e^+e^- colliders

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Chinese Physics C 2010年第6期34卷 877-882页

作者： g.V.Fedotovich e.A.Kuraev A.l.Sibidanov Budker Institute of Nuclear Physics Novosibirsk State University Joint Institute of Nuclear Research

A Monte-Carlo generator Photon Jets （MCgPJ） to simulate Bhabha scattering as well as production of two charged muons and two photons events is discussed. The theoretical precision of the cross sections with radiative corrections （RC） is estimated to be smaller than 0.2%. The Next leading Order （NlO） radiative corrections proportional to α are treated exactly, whereas the all logarithmically enhanced contributions, related to photon jets emitted in the collinear region, are taken into account in frame of the Structure Function approach. Numerous tests of the MCgPJ as well as a detailed comparison with other MC generators are presented.

关键词： luminosity e^+e^- hadrons detectors

lighting up aggregate emission of perylene diimide by leveraging polymerization-mediated through-space charge transfer and π-π stacking

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Science China Chemistry 2024年第12期67卷 4218-4233页

作者： Suiying Ye désirée Füglistaller Tian Tian Anjay Manian Sudhir Kumar Celine Nardo Andrew J.Christofferson Salvy P.Russo Chih-Jen Shih Jean-Christophe leroux Yinyin Bao Institute of Pharmaceutical Sciences Department of Chemistry and Applied BiosciencesETH ZurichVladimir-Prelog-Weg 38093 ZurichSwitzerland Institute for Chemical and Bioengineering Department of Chemistry and Applied BiosciencesETH ZurichVladimir-Prelog-Weg 1-5/108093 ZurichSwitzerland ARC Centre of excellence in exciton Science School of ScienceRMIT UniversityMelbourneVictoria3001Australia School of Science STEM CollegeRMIT UniversityMelbourneVictoria 3001Australia

The molecular engineering of fluorescent organic/polymeric materials,specifically those emitting in the deep red to near-infrared spectrum,is vital for advancements in optoelectronics and *** diimide(PdI),a well-known fluorescent scaffold,offers high thermal and photophysical stability but suffers from fluorescence quenching in solid or aggregate states due to intenseπ-π*** mitigate this,simple and versatile methods for strong PdI aggregate emission without extensive synthetic demands are highly desirable but still ***,we report a straightforward strategy to enhance the solid-state emission of PdI by introducing certain degree of through-space charge transfer(TSCT)via controlled radical polymerization,which can efficiently distort the typical face-to-face PdI stacking,enabling greatly enhanced deep red *** is achieved by growing electron-donating star-shape styrenic(co)polymers from a multidirectional electron-accepting PdI *** incorporation of polycyclic aromatic monomers further shifted the emission into the near-infrared region,albeit with a reduced ***,the emission of the PdI-based TSCT polymers can be systematically manipulated by leveraging the balance between PdI stacking and the TSCT degree,as confirmed by both experimental study and theoretical *** approach circumvents complex synthetic procedures,offering highly emissive materials with large Stokes shifts and showing broad potential for optoelectronic technology.

关键词： through-space charge transfer controlled radical polymerization solid-state emission perylene diimide

A New Cytotoxic Sterol Produced by an endophytic Fungus from Castaniopsis fissa at the South China Sea Coast

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Chinese Chemical letters 2004年第4期15卷 419-422页

作者： HouJinlI YongChenglIN l.l.P.VRIJMOed e.B.g.JONeS departmentofAppliedChemistry ZhongshanUniversityGuangzhou510275 departmentofBiologyandChemistry CityUniversityofHongKongHongKong

A new sterol, ergosta-8(9),22-diene-3,5,6,7-tetraol(3β,5α,6β,7α,22e)(A) together with three known sterols: 3β, 5α,6β-trihydroxyergosta-7,22-diene (B), 3β-hydroxy-5α,8α- epidioxyer-gosta-6,22-diene (C) and ergosterol (d) were isolated from the mycelia of an unidentified endophytic fungus separated from Castaniopsis fissa (chestnut tree). Compound A exhibited potent selective cytotoxicity against Bel-7402, NCI4460 and l-02 cell lines with IC50 values 8.445, 5.03, 13.621 μg/ml, respectively.

关键词： endophytic fungus sterols ergosta-8(9) 22-diene-3,5,6,7-tetraol (3β,5α,6β,7α,22e) cytotoxicity.

Recent Advancements in the Optimization Capacity Configuration and Coordination Operation Strategy of Wind-Solar Hybrid Storage System

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energy engineering 2025年第1期122卷 285-306页

作者： Hongliang Hao Caifeng Wen Feifei Xue HaoQiu Ning Yang Yuwen Zhang Chaoyu Wang edwin e.Nyakilla department of New energy Storage Peking University Ordos Research Institute of EnergyOrdos017010China School of energy and Power engineering Inner Mongolia University of TechnologyHohhot010080China Key laboratory of Wind energy and Solar energy Utilization Technology Inner Mongolia University of TechnologyHohhot010051China

Present of wind power is sporadically and cannot be utilized as the only fundamental load of energy *** paper proposes a wind-solar hybrid energy storage system(HeSS)to ensure a stable supply grid for a longer period.A multi-objective genetic algorithm(MOgA)and state of charge(SOC)region division for the batteries are introduced to solve the objective function and configuration of the system capacity,***/Simulink was used for simulation *** optimization results show that for a 0.5 MW wind power and 0.5 MW photovoltaic system,with a combination of a 300 Ah lithium battery,a 200 Ah lead-acid battery,and a water storage tank,the proposed strategy reduces the system construction cost by approximately 18,000 ***,the cycle count of the electrochemical energy storage systemincreases from4515 to 4660,while the depth of discharge decreases from 55.37%to 53.65%,achieving shallow charging and discharging,thereby extending battery life and reducing grid voltage fluctuations *** proposed strategy is a guide for stabilizing the grid connection of wind and solar power generation,capability allocation,and energy management of energy conservation systems.

关键词： electric-thermal hybrid storage modal decomposition multi-objective genetic algorithm capacity optimization allocation operation strategy

SCIeNTIFIC PRINCIPleS FOR MOdIFICATION OF WATeR-SOlUBle POlYMeRS. FORMATION OF MACROMOleCUlAR COMPleXeS

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Chinese Journal of Polymer Science 1998年第3期16卷 268-278页

作者： PAUTOV V.d. ANUFRIeVA e.V. KRAKOVYAK M.g. Institute of Macromolecular Compounds RAS Bolshoy pr. 31 St. Petersburg 199004 RussiaInstitute of Macromolecular Compounds RAS Bolshoy pr. 31 St. Petersburg 199004 RussiaInstitute of Macromolecular Compounds RAS Bolshoy pr. 31 St. Petersburg 199004 Russia

The study of nanosecond dynamics of macromolecules with the lumines-cent methods make it possible to investigate the formation and functioning of polymericcomplexes, polymeric conjugates and macromolecular metal complexes, which are widelyused for solving many practical tasks. The nanosecond dynamics of macromolecules are ahighly sensitive indicator of interpolymer complexes (IPC) formation. It enables us to solvethe problems of studying IPC formation and stability and to investigate the interpolymerreactions of exchange and substitution. The investigation of changes in the rotational mo-bility of globular protein molecules as a whole makes it possible to determine the complexcomposition and its stability, and to control the course of polymer-protein conjugate forma-tion reaction. The nanosecond dynamics of polymers interacting with surfacants' ions (S)are the sensitive indicator of the S-polymer complex formation. A method for determin-ing the equilibrium constants of the S-polymer complex formation was developed on thebasis of the study of polymer chains mobility. It is established that nanosecond dynamicsinfluences the course of chemical reactions in polymer chains. Moreover, the marked effectof the nanosecond dynamics is also revealed in the study of photophysical processes (theformation of excimers and energy migration of electron excitation) in polymers with pho-toactive groups. It was found that the efficiency of both processes increases with increasingthe mobility of side chains, the carriers of photoactive groups.

关键词： Modification of water-soluble polymers Formation of complexes

A FleXIBle PReCONdITIONed ARNOldI MeTHOd FOR SHIFTed lINeAR SYSTeMS

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Journal of Computational Mathematics 2007年第5期25卷 522-530页

作者： g.-d. gu X.-l. Zhou lei lin department of Applied Mathematics Shanghai University of Finance and Economics Shanghai 200433 China department of Mathematics Shanghai University Shanghai 200436 China

We are interested in the numerical solution of the large nonsymmetric shifted linear system, （A ＋ αI）x -= b, for many different values of the shift a in a wide range. We apply the Saad＇s flexible preconditioning technique to the solution of the shifted systems. Such flexible preconditioning with a few parameters could probably cover all the shifted systems with the shift in a wide range. Numerical experiments report the effectiveness of our approach on some problems.

关键词： Shifted linear systems 65F10 65Y20. Arnoldi method Flexible preconditioning

effect of Some Heterocyclic derivatives on the Removal of Copper Ions from Wastewater by Cementation

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Journal of Materials Science & Technology 2004年第5期20卷 539-546页

作者： A.A.Taha M.g.Marei d.e.Abd el-khalek department of Chemistry Faculty of ScienceUniversity of AlexandriaAlexandriaEgyptDepartment of ChemistryFaculty of ScienceUniversity of AlexandriaAlexandriaEgyptDepartment of ChemistryFaculty of ScienceUniversity of AlexandriaAlexandriaEgypt

Removal of copper ions from copper sulphate solutions on a rotating zinc rod in absence and in presence of 3(2H)-furanones and 4H-pyran-4-one derivatives was investigated experimentally. Variables studied were initial copper ions concentration, rotational speed of the zinc rod, temperature and concentration of organic additives. It was found that cementation reaction is first order in presence and in absence of additives. Increasing concentration of initial copper ions, rotational speed of the zinc rod and temperature were found to increase the rate of cementation. In presence of organic additives an enhancement of the rate was observed, except in presence of methoxyfuranone the rate was found to decrease by an amount ranging from 11.74% to 33.79%. Rate acceleration or inhibition is associated mainly with changes in the structure of the additives as well as its concentration. The apparent activation energy for the cementation process in presence of different additives was estimated and was found to be ranged between 11.8 kJ/mol and 25.95 kJ/mol. These values suggest that the copper removal process in presence of these additives is controlled by diffusion. A scanning electron microscopy study of copper deposits obtained in presence of tolylfuranone, phenylpyrone and methoxyfuranone correlate with their behaviour during the kinetic study. different reaction conditions and the physical properties of solutions were studied to obtain dimensionless correlation among all these parameters. It was found that on applying cementation reaction on a sample from industrial wastewater in presence of phenylpyrone about 91.9% of Cu2+ are removed.

关键词： Cementation of copper Furanone and pyrone derivatives