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Applied Mathematics(A Journal of Chinese Universities) 2012年第4期27卷 435-454页

作者： FEI wei-yin School of Mathematics and Physics Anhui Polvtechnic UniversityWuhu 241000China

This article studies optimal consumption-leisure, portfolio and retirement selection of an infinitely lived investor whose preference is formulated by a-maxmin expected CES utility which is to differentiate ambiguity and ambiguity attitude. Adopting the recursive multiple- priors utility and the technique of backward stochastic differential equations （BSDEs）, we transform the （^-maxmin expected CES utility into a classical expected CES utility under a new probability measure related to the degree of an investor＇s uncertainty. Our model investi- gates the optimal consumption-leisure-work selection, the optimal portfolio selection, and the optimal stopping problem. In this model, the investor is able to adjust her supply of labor flex- ibly above a certain minimum work-hour along with a retirement option. The problem can be analytically solved by using a variational inequality. And the optimal retirement time is given as the first time when her wealth exceeds a certain critical level. The optimal consumption-leisure and portfolio strategies before and after retirement are provided in closed forms. Finally, the distinctions of optimal consumption-leisure, portfolio and critical wealth level under ambiguity from those with no vagueness are discussed.

关键词： α-maxmin expected CES utility stochastic control BSDEs optimization of utility variationalinequality optimal consumption-leisure-portfolio and retirement.

On existence and uniqueness of solutions to uncertain backward stochastic differential equations

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Applied Mathematics(A Journal of Chinese Universities) 2014年第1期29卷 53-66页

作者： FEI wei-yin School of Mathematics and Physics Anhui Polytechnic University

This paper is concerned with a class of uncertain backward stochastic differential equations （UBSDEs） driven by both an m-dimensional Brownian motion and a d-dimensional canonical process with uniform Lipschitzian coefficients. Such equations can be useful in mod- elling hybrid systems, where the phenomena are simultaneously subjected to two kinds of un- certainties： randomness and uncertainty. The solutions of UBSDEs are the uncertain stochastic processes. Thus, the existence and uniqueness of solutions to UBSDEs with Lipschitzian coeffi- cients are proved.

关键词： Uncertain backward stochastic differential equations(UBSDEs) canonical process existence and uniqueness Lipschitzian condition martingale representation theorem

Influence of temperature on metal-organic frameworks

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Chinese Chemical Letters 2014年第6期25卷 823-828页

作者： yin-Xia Sun wei-yin Sun Coordination Chemistry Institute State Key Laboratory of Coordination ChemistrySchool of Chemistry and Chemical EngineeringNanjing National Laboratory of MicrostructuresNanjing University School of Chemical and Biological Engineering Lanzhou Jiaotong University

Reaction temperature is one of the key parameters in the synthesis of metal-organic frameworks （MOFs）. Though there is no convergence with regard to the various experimental parameters, reaction temperature has been found to have remarkable influence on the formation and structure of MOFs, especially toward the control of topology and dimensionality of the MOF structures. Theoretically, the reaction temperature affects directly the reaction energy barrier in reaction thermodynamics and the reaction rate in the reaction kinetics. This review aims to show the influence of reaction temperature on crystal growth/assembly, structural modulation and transformation of MOFs, and to provide primary information and insights into the design and assernblv of desired MOFs.

关键词： Metal-organic frameworks (MOFs) Reaction temperature Structural transformation

Nutrient transport following water transfer through the world's largest water diversion channel

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Journal of Environmental Sciences 2024年第1期135卷 703-714页

作者： Yuanhui Cheng Hong Zhang wei yin State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085 China Changjiang Water Resources Protection Institute Wuhan 430051China University of Chinese Academy of Sciences Beijing 100049China

Nutrient levels in the artificial channel constructed for the Middle Route Project are significant indicators of water quality safety and aquatic ecological integrity for this large,interbasin ***,the distribution and transport of nutrients along the channel were poorly *** on a time-series dataset as well as mass balance and material flow analysis methods,the water and nutrient transport fluxes in the Middle Route of the South-to-North Water Diversion Project were identified in this *** results indicate that the nutrient concentrations varied considerably with time,but there was no significant difference among the 30 stations of the main *** temperature difference was the major factor in the large fluctuations of water quality indicators over *** nutrient loadings varied with the water volume outputs from the main channel to the waterreceiving *** deposition was an important source of nutrients in the main channel,accounting for 9.13%,20.6%,and 0.635%of the nitrogen,phosphorus,and sulfur input from the Danjiangkou Reservoir,*** 2021,a net accumulation of 988 tons of N,29 tons of P,and 2,540 tons of S,respectively,were present in the main *** increase of these external and internal nutrient loadings would cause water quality fluctuation and deterioration in some local sections of the main *** study quantified the spatial and temporal patterns of nutrient transport in the Middle Route and revealed the ecological effects on the aquatic environment,assisting authorities on the project to develop effective water conservation strategies.

关键词： Nutrient transport Spatiotemporal patterns The Middle Route The South-to-North Diversion Project Hydro-ecological effects Water-receiving cities

Asymmetric Reactions Catalyzed by Chiral Tertiary Phosphines

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Chinese Journal of Chemistry 2020年第11期38卷 1395-1421页

作者： yin wei Min Shi State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular SynthesisUniversity of Chinese Academy of SciencesShanghai Institute of Organic ChemistryChinese Academy of Sciences345 Ling ling RoadShanghai 200032China

Chiral tertiary phosphines are versatile Lewis base catalysts capable of promoting a wide range of asymmetric *** particular,the recent designed chiral phosphines based on the concept of bi-/multifunctionality have been demonstrated to be effective catalysts for many types of asymmetric reactions such as(aza)-MBH reaction/RC reaction,cycloaddition reaction,domino reaction,nucleophilic addition reaction,*** review summarizes the recent advances in this field and highlights the selected significant achievements.

关键词： Chiral asymmetric versatile

Einstein-Kahler Metric with Explicit Formula on Super-Cartan Domain of the Fourth Type

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Acta Mathematica Sinica,English Series 2006年第2期22卷 367-376页

作者： An WANG wei Ping yin Department of Mathematics Capital Normal University

Let YIV be the Super-Cartan domain of the fourth type, We reduce the Monge-Ampere equation for the metric to an ordinary differential equation in the auxiliary function X = X（Z, W）. This differential equation can be solved to give an implicit function in X. We give the generating function of the Einstein Kahler metric on YIV. We obtain the explicit form of the complete Einstein-Kahler metric on YIV for a special case.

关键词： Super-Cartan domain Einstein-Kahler metric Holomorphic sectional curvature Generating function

A Copper-Catalyzed[5+1]Cycloaddition of Terminal Alkynes with Diazo Esters through a Tandem 1,5-H-Shift Cyclization

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Chinese Journal of Chemistry 2023年第3期41卷 301-306页

作者： Tonggang Hao Min Shi yin wei State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular SynthesisUniversity of Chinese Academy of SciencesShanghai Institute of Organic ChemistryChinese Academy of Sciences345 Lingling RoadShanghai200032 China

A copper-catalyzed[5+1]cycloaddition reaction of terminal alkynes with diazo esters for the rapid construction of protected naphthalen-1(2H)-one derivatives in moderate to good yields has been disclosed along with good functional group compatibility and a broad substrate *** mechanistic investigations reveal that this tandem cyclization process proceeds through a Cu(I)-catalyzed coupling of terminal alkyne with diazoacetate,a 1,5-H shift process and a thermally induced pericyclic reaction via an allene *** synthetic utility and the further transformations of the obtained cycloadduct to naphthalenone,naphthol and dihydronaphthol have been also presented in this paper.

关键词： [5+1]Cycloaddition Diazo ester 1,5-H-shift One-pot synthesis Copper catalyzed

Rotational atherectomy:an Update

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Journal of Geriatric Cardiology 2013年第3期10卷 211-212页

作者： wei-Hsian yin Division of Cardiology Heart Center Cheng-Hsin General Hospital No. 45 Cheng-Hsin Street Bei-Tou Taipei 112 Taiwan China

As we known, drug-eluting stents (DES) reduce the risk of restenosis and represent an important advance in coronary intervention. Newer-generation DES with thin struts releasing limus-family drugs from durable or biodegradable polymers have further improved clinical outcomes, as compared with early-generation DES releasing sirolimus or paclitaxel. The risk of stent thrombosis has become exceedingly low, that is, the improved safety profile of newer DES comes without compromising their effectiveness.

关键词： Drug-eluting stent Left main coronary artery Percutaneous coronary intervention Rotablator burr entrapment Rotational atherectomy

Mechanistic Studies on Propargyl Alcohol-Tethered Alkylidenecyclopropane with Aryldiazonium Salt Initiated by Visible Light

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Chinese Journal of Chemistry 2021年第2期39卷 295-300页

作者： Jiaxin Liu yin wei Min Shi State Key Laboratory of Organometallic Chemistry Center for Excellence in Molecular SynthesisUniversity of Chinese Academy of ScienceShanghai Institute of Organic ChemistryChinese Academy of Sciences345 Lingling RoadShanghai200032 China Shenzhen Grubbs Institute Southern University of Science and TechnologyShenzhenGuangdong518000 China

This paper discloses the reaction mechanism of two consecutive but different visible light photo-induced chain processes for the rapid construction of spirobi[indene]*** first process is triggered by a photo-induced single-electron-transfer(SET)of an electron donor-accepter(EDA)*** second process is initiated by a direct SET process between aryldiazonium salt and the excited allenic *** these two processes,another SET took place respectively on the in situ formed radical intermediate to realize a redox-neutral *** mechanistic studies have been carried out by control experiments,kinetic and spectroscopic analyses,deuterium labeling experiments to support these two chain processes.

关键词： Mechanistic study Photochemistry Radical ion Spirobi[indene] Radical chain

Privileged chiral catalysts in asymmetric Morita-Baylis-Hillman/aza-Morita-Baylis-Hillman reaction

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Chinese Science Bulletin 2010年第17期55卷 1699-1711页

作者： wei yin SHI Min State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences Shanghai 200032 China

In the past decade, the asymmetric Morita-Baylis-Hillman (MBH)/aza-Morita-Baylis-Hillman (aza-MBH) reaction has attracted great attention because it leads to the formation of densely functionalized products in a catalytic and atom-economic way. The MBH/aza-MBH adducts can be further applied in a wide variety of organic synthesis, such as peptide synthesis and heterocyclic compounds synthesis. After a lot of attempts to improve the enantioselectivity, many types of chiral organocatalysts have been identified as highly enantioselective organocatalysts in MBH/aza-MBH reaction. Especially, certain "privileged chiral catalysts" are highly enantioselective in MBH/aza-MBH reaction, which are designed and developed through introducing bi-/multi-functional groups on the so-called "privileged structures" such as cinchona alkaloids, BINAP/BINOL. This review summarizes the exciting advances about the design and development of chiral catalysts derived from "privileged structures" and their applications in asymmetric MBH/aza-MBH reaction.

关键词：手性催化剂选择性反应不对称氮杂特权对映选择性有机催化剂有机合成