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Electrocatalytic cleavage of a lignin β-O-4 model compound and coupling with nitrogen-containing aromatics using Prussian blue analogue-derived nickel–cobalt spinel

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Journal of Energy Chemistry 2025年第1期100卷 628-636页

作者： yi qi Xueying Chen Bowen Liu Xuliang Lin Xueqing qiu Yanlin qin Guangdong Provincial Key Laboratory of Plant Resources Biorefinery School of Chemical Engineering and Light Industry Guangdong University of Technology Guangdong Provincial Laboratory of Chemistry and Fine Chemical Engineering Jieyang Center Guangdong Basic Research Center of Excellence for Ecological Security and Green Development Guangdong University of Technology

Electrochemical conversion of lignin for the production of high-value heterocyclic aromatic compounds has great *** demonstrate the targeted synthesis and cation modulation of NiCo2O4spinel nanoboxes,synthesized via cation exchange and calcination *** catalysts exhibit excellent efficacy in the electrocatalytic conversion of lignin model compounds,specifically 2-phenoxy-1-phenylethanol,into nitrogen-containing aromatics,achieving high conversion rates and *** catalysts were synthesized via a cation exchange and calcination oxidation process,using Prussian blue nanocubes as *** porous architecture and polymetallic composition of the NiCo2O4spinel demonstrated superior performance in electrocatalytic oxidative coupling,achieving a 99.2 wt%conversion rate of the 2-phenoxy-1-phenylethanol with selectivities of 37.5 wt%for quinoline derivatives and 31.5 wt%for *** innovations include the development of a sustainable one-pot synthesis method for quinoline derivatives,the elucidation of a multistage reaction pathway involving CAO bond cleavage,hydroxyaldol condensation,and CAN bond formation,and a deeper mechanistic understanding derived from DFT *** work establishes a new strategy for lignin valorization,offering a sustainable route to produce high-value nitrogen-containing aromatics from renewable biomass under mild conditions,without the need for additional reagents.

关键词： Spinel Biomass valorization Electrocatalysis Lignin oxidation Coupling

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Local boundary dilatation of quasiconformal maps

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Science China Mathematics 2005年第6期48卷 798-807页

作者： qi yi Department of Applied Mathematics LIMB of the Ministry of Education Beijing University of Aeronautics and Astronautics Beijing 100083 China

By studying the existence problem of locally extremal Beltrami differential posed by F. Gardiner and N. Lakic, we introduce a new definition of the local boundary dilatations of points in Teichmuller spaces of simply connected plane domains, which is the same as the usual ones in the case of Jordan domains. Then we show that the answer to the problem of F. Gardiner and N. Lakic is affirmative according to this new definition. Comparing with the usual definitions, the problem of F. Gardiner and N. Lakic is partly answered and the results of G. Cui and Y. qi is generalized.

关键词： quasiconformal map Teichmiiiler space.

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Co-orbital transition of 2016 HO_(3)

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Astrodynamics 2023年第1期7卷 3-14页

作者： yi qi Dong qiao School of Aerospace Engineering Beijing Institute of Technology5 South Zhongguancun StreetBeijing 100081China

In this paper,we investigate the orbital behavior of the transition between the quasisatellite(QS)and horseshoe(HS)motions of 2016 *** on the phase space structure in the Sun-Earth circular restricted three-body problem,we find that the surface of 2016 HO in the torus space is a compound surface formed by QS and HS *** co-orbital motion is therefore a QS-HS transition.2016 HO3 is currently located in a QS state,and its locus clings to the QS portion in the isosurface in agreement with the semi-analytical *** provide a criterion to separate the QS and HS stages in the transition and obtain accurate incoming and outgoing epochs of the QS *** then propose an approximate curve to describe the locus of 2016 HO3 in the w-e *** asteroids(VAs)near 2016 HO in the isosurface were created to study the infuence of the initial state of the QS-HS *** find that the duration of the QS state is mainly influenced by the loci in the w-e *** VAs with large QS durations usually have longer loci across the QS region than those with shorter *** addition,although some VAs are close to 2016 HO3 in the w-e projection,their co-orbital behaviors are significantly different from that of the *** indicates that the QS-HS transition of 2016 HO3 is sensitive to the(w,e)position.

关键词： Asteroid 469219 Kamo'oalewa(2016 HO_(3)) co-orbital motion transition torus space semi-analytical method

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On Nonuniqueness of Geodesics and Geodesic Disks in the Universal Asymptotic Teichmüller Space

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Acta Mathematica Sinica,English Series 2017年第2期33卷 201-209页

作者： yi qi Yan WU LMIB and School of Mathematics and Systems Science Beihang University Beijing 100191 P. R. China School of Science Linyi University Linyi 276005 P. R. China

Abstract The non-uniqueness on geodesics and geodesic disks in the universal asymptotic Teichmfiller space AT（D） are studied in this paper. It is proved that if # is asymptotically extremal in [[#]] with h （μ）〈 h＊（μ） for some point ζ∈D, then there exist infinitely many geodesic segments joining [[0]] and [[μ]], and infinitely many holomorphic geodesic disks containing [[0]] and [μ]] in AT（D）.

关键词： Asymptotic Teichmuller space geodesics geodesic disks holomorphic isometry Teichmul-ler metric

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Recent Progress on Water-based Liquid Embolic Agents in Endovascular Treatment

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Chemical Research in Chinese Universities 2024年第5期40卷 776-785页

作者： qi yi FAN Hailong Department of Neurosurgery Faculty of Medicine and Graduate School of MedicineHokkaido UniversitySapporo060-8638Japan Institute for Chemical Reaction Design and Discovery(WPI-ICReDD) Hokkaido UniversitySapporo001-0021Japan

Vascular embolization treatment,a minimally invasive surgery for various blood vessel-related conditions,has emerged as a crucial method in treating such as hemorrhage,arteriovenous malformation,aneurysms,and hypervascular *** embolic agents are gaining prominence due to their distinct advantage in infiltrating distal regions,expanding the scope of embolization beyond the reach of solid *** strides in biomaterials and technologies have spurred the development of novel liquid embolic agents,addressing challenges posed by traditional *** mini-review provides a concise overview of the recent progress in water-based liquid embolic agents,highlighting their potential to overcome limitations associated with current embolic *** presenting selected research outcomes,we illuminate advancements that enhance the efficacy of liquid embolic ***,the review outlines essential properties for effective liquid embolic agents,offering insights for future developments in this field.

关键词： Endovascular treatment Lquid embolic agent Hydrogel

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Influence of the Spudcan Angle on the Ultimate Bearing Capacity of Jack-up Platform

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China Ocean Engineering 2018年第4期32卷 476-481页

作者： ZHANG qi-yi LIU Zhi-jie Department of Ocean Engineering College of EngineeringOcean University of ChinaQingdao 266100China Key Laboratory of Ocean Engineering of Shandong Province Qingdao 266100China

Jack-up platforms of the Ocean engineering structures always withstand the vertical gravity loads which are applied to the seabed by spudcan, so it is important to determine the bearing capacity and the penetration depth of the spudcan for its geometry. In fact, it is up to the deformation law and the failure modes of soil surrounding the spudcan which can calculate the ultimate bearing capacity of the spudcan foundation on the soil seabed. By using the finite element analysis software Abaqus, the deformation law of soil around the spudcan is analyzed in detail, and the failure modes of soil surrounding the spudcan foundation are achieved. At the same time, based on the limit equilibrium theory, by use of static permissible slip-line field, the ultimate bearing capacity of the spudcan foundation is analyzed and the lower limit solution is derived theoretically, and the effect of the spudcan angle on the ultimate bearing capacity is investigated. The numerical results are compared with those obtained by the theoretical formulas deduced in this paper. On the basis of the lower limit solutions in this paper, the effect of the spudcan angle on the ultimate bearing capacity is revealed, and a practical bearing capacity formula is given to take the effect of the spudcan angle into consideration.

关键词： spudcan lower limit analysis ultimate bearing capacity failure modes Abaqus

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Trajectory correction for lunar flyby transfers to libration point orbits using continuous thrust

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Astrodynamics 2022年第3期6卷 285-300页

作者： yi qi Anton de Ruiter School of Aerospace Engineering Beijing Institute of TechnologyBeijing 100081China Department of Aerospace Engineering Ryerson UniversityTorontoON M5B 2K3Canada

Trajectory corrections for lunar flyby transfers to Sun–Earth/Moon libration point orbits(LPOs)with continuous thrusts are investigated using an ephemeris *** lunar flyby transfer has special geometrical and dynamical structures;therefore,its trajectory correction strategy is considerably different from that of previous studies and should be specifically *** this paper,we first propose a control strategy based on the backstepping technique with a dead-band scheme using an ephemeris *** initial error caused by the launch time error is *** the perturbed transfers significantly diverge from the reference transfers after the spacecraft passes by the Moon,we adopt two sets of control parameters in two portions before and after the lunar flyby,***,practical constraints owing to the navigation and propellant systems are introduced in the dynamical model of the trajectory *** a prograde type 2 orbit as an example,numerical simulations show that our control strategy can efficiently address trajectory corrections for lunar flyby transfers with different practical *** addition,we analyze the effects of the navigation intervals and dead-band scheme on trajectory ***,trajectory corrections for different lunar flyby transfers are depicted and compared.

关键词： libration point orbit trajectory correction Earth-Moon system continuous thrust backstepping technique

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ON QK(p)-TEICHMüLLER SPACES

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Acta Mathematica Scientia 2024年第6期44卷 2283-2295页

作者： yi qi Yan WU School of Mathematical Sciences Beihang UniversityBeijing 100191China School of Mathematics and Statistics Linyi UniversityLinyi 276000China

The QK(p)-Teichmüller space is introduced and studied in this *** characterizations of the QK(p)-Teichmüller space and the QK,0(p)-Teichmüller space are *** Schwarzian derivative model and pre-logarithmic derivativ... 详细信息

关键词： Qk(p,q)spaces universal Teichmüller space Schwarzian derivative pre-logarithmic derivative Carleson measure

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Isometric Embeddings of Subsets of Boundaries of Teichmüller Spaces of Compact Hyperbolic Riemann Surfaces

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Acta Mathematica Sinica,English Series 2020年第5期36卷 605-619页

作者： Guang Ming HU yi qi College of Science Jinling Institute of TechnologyNanjing 211169P.R.China LMIB and School of Mathematics and Systems Science Beihang UniversityBeijing 100191P.R.China

It is known that every finitely unbranched holomorphic covering π:S→S of a compact Riemann surface S with genus g≥2 induces an isometric embedding Φπ:Teich(S)→Teich(S).By the mutual relations between Strebel rays in Teich(S)and their embeddings in Teich(S),we show that the 1 st-strata space of the augmented Teichmüller space Teich(S)can be embedded in the augmented Teichmüller space Teich(S)***,we show that Φπ induces an isometric embedding from the set Teich(S)B(∞)consisting of Busemann points in the horofunction boundary of Teich(S)into Teich(S)B(∞)with the detour metric.

关键词： Teichmüller space augmented Teichmüller space Strebel ray Busemann points

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Computational Bioluminescence

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Chinese Journal of Chemistry 2021年第1期39卷 43-49页

作者： yi-qi Tang Ya-Jun Liu College of Chemistry Beijing Normal UniversityBeijing 100875China

Bioluminescence(BL)is an amazing natural phenomenon whose visible light is pro-duced by living *** to its high sensitivity,high selectivity and high signal-to-noise ratio,BL has been applied broadly in biotechnology and biomedical ***,for centuries,we can only receive some sporadic and static information from experimental observations,the mechanism of most BL is *** the past 14 years,we have been performing theoretical study on all kinds of bioluminescent systems,and have uncovered the mechanism and details of several *** as an example,we qualitatively introduce our theoretical study of firefly BL in this account.

关键词： Bioluminescence Reaction mechanisms Density functional calculations Ab initio calculations Molecular dynamics

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