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Aggregation-induced Emission of Non-conjugated Poly(amido amine)s:Discovering,Luminescent Mechanism Understanding and Bioapplication

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chinese Journal of Polymer Science 2015年第5期33卷 680-687页

作者： Rui-bin wang wang-zhang Yuan 朱新远 School of Chemistry and Chemical Engineering Shanghai Key Lab of Electrical Insulation and Thermal AgingShanghai Jiao Tong University Instrumental Analysis Center Shanghai Jiao Tong University

It is found that the fluorescence of aliphatic poly（amido amine）s including linear and hyperbranched ones can be dramatically enhanced by simple aggregation of polymer chains, attributing to the formation of a variety of intra- and interchain clusters with shared lone-pair electrons and the restriction of intramolecular motions. Thanks to the combination of strong solid fluorescence and excellent biocompatibility, these non-conjugated polymers become promising candidates for bioimaging such as bacterial detection. This finding not only extends the aggregation-induced emission（AIE） systems from conjugated compounds to non-conjugated materials, which expands the bioapplication range of AIE systems, but also sheds light on the exploration of novel unconventional luminogens.

关键词： Luminescence Aggregation-induced emission Non-conjugated polymer

NUMERICAL SIMULATION OF MORPHOLOGY OF POLYMER CHAIN COILS IN COMPLEX FLOWS

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chinese Journal of Polymer Science 2005年第5期23卷 453-462页

作者： Hong Zheng Wei Yu chi-xing Zhou Department of Polymer Materials Science & Engineering,Shanghai Jiaotong University,Shanghai 200240,china Shanghai Jiao Tong Univ Dept Polymer Mat Sci & Engn Shanghai 200240 Peoples R China

A new coupled finite element formulation is proposed to calculate a conformation tensor model in two complex flows： a planar contraction flow and a planar flow around a symmetrically placed cylinder. The components of conformation tensor are first computed together with the velocity and pressure to describe the change of morphology of polymer chain coils in flow fields. Macroscopic quantities of viscoelastic flow are then calculated based on the conformation tensor. Comparisons between the numerical simulations and experiments for stress patterns and velocity profiles are carried out to prove the validity of the method.

关键词： Viscoelastic flow Morphology Complex flows Conformation tensor model Finite element method (FEM).

CO_(2)and Cost-Based Optimum Design of Sustainable Metakaolin-Modified Concrete

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Journal of Renewable Materials 2022年第9期10卷 2431-2450页

作者： Xiaoyong wang Department of Architectural Engineering Department of Integrated Energy and Infra SystemKangwon National UniversityChuncheon-si24341Korea

Metakaolin is a highly reactive pozzolanic material that is widely utilized for enhancing the performance of *** study offers a framework for the mixture design of sustainable metakaolin-modified concrete with low CO_(2)emissions and low *** design strengths after 28 days are first formulated,with values such as 30,40,50,and 60 MPa.A genetic algorithm is then used to determine the optimal *** CO_(2)and cost are set as the aims of the genetic *** strength of the concrete,its workability(slump),and carbonation service life with climate change are set as constraints of the genetic *** design cases are considered:1)low-CO_(2)concrete with no carbonation,2)low-CO_(2)concrete with carbonation,3)low-material cost concrete with carbonation,4)low-total cost concrete with carbonation,and 5)low-total cost concrete with climate *** on the analysis,the following results are found:1)When the design’s strength is 30 MPa,to satisfy the requirement of carbonation durability,the concrete real strength should exceed 30 ***,after considering climate change,the concrete real strength should be further improved.2)When the design strength is 40,50,or 60 MPa for low-total-cost concrete,climate change has no impact on the optimal design because the concrete has sufficient carbonation resistance.3)Low-material-cost concrete has the same mixture as low-total-cost concrete because compared with the material cost,the CO_(2)emission cost is much ***,for low-material-cost or low-total-cost concrete,the metakaolin content is at the lower limit because the price of metakaolin is much higher than that of ***,the proposed model covered different aspects of sustainable concrete,such as cost and CO_(2)emissions,clarified various decisive factors of mix design,such as strength and carbon durability,and considered different conditions of climate change,such as no climate change and Representative Concentra

关键词： Metakaolin CO_(2) cost optimal design carbonation climate change

Monitoring gas-and particulate-phase short-chain polychlorinated paraffins in the urban air of Dalian by a self-developed passive sampler

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Journal of Environmental Sciences 2019年第6期31卷 287-295页

作者： Yifan wang Xiuhua Zhu Yuan Gao Hao Bai Pengyuan wang Jiping Chen Heping Yuan Longxing wang Xiaoxiao Li Wei wang School of Environmental and Chemical Engineering Dalian Jiaotong University Dalian Institute of Chemical Physics Chinese Academy of Sciences College of Chemistry Jilin University Dalian Meteorological Observatory

The concentration of short-chain polychlorinated paraffins(SCCPs) in the urban air of Dalian,china was monitored from September 2016 to August 2017 with a self-developed passive sampler(PAS1) and an active high-volume sampler, simultaneously. PAS1 successfully collected the entire target SCCPs in the ambient air. Air SCCPs sampled by PAS1 were found be in the linear uptake stage during 181 days of sampling. Passive and active samples showed comparable congener profiles, and the dominant contributors of SCCPs in the two kinds of samples were similar. A significant linear correlation was observed between the total concentration of SCCPs sampled by PAS1 and active sampler in the four seasons. The passive sampling rates of the PAS1 for the gas and particulate phases of SCCPs were measured. The quantitative structure–property relationship of the sampling rate of PAS1(Rair) for gas-phase SCCPs was studied. From the molecular point of view, Rairwas mainly affected by the molecular weight and sub-cooled liquid vapor pressure of SCCPs. In general, SCCPs in the urban air of Dalian mainly existed in gas phase,lower molecular weight SCCPs primarily occurred in the gas phase, whereas higher molecular weight SCCPs were predominately adsorbed or absorbed on airborne particles. The air concentration of SCCPs in the four seasons were different, the correlation of the concentration of SCCPs in the air with the meteorology parameters was conducted. The exposure risk by intake air SCCPs of the residents around the sampling sites was evaluated according to the European risk assessment standards.

关键词： Ambient air Short-chain polychlorinated paraf fins Passive sampler Active sampling Passive sampling

Stochastic H_2/H_∞ Control with Random Coefcients

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chinese Annals of Mathematics,Series B 2013年第5期34卷 733-752页

作者： Meijiao wang Department of Mathematical Finance and Stochastic Control School of Mathematical SciencesFudanUniversity Faculty of Science Ningbo University

Abstract This paper is concerned with the mixed H2/H∞ control for stochastic systems with random coefficients, which is actually a control combining the H2 optimization with the H∞ robust performance as the name of H2/H∞ reveals. Based on the classical theory of linear-quadratic （LQ, for short） optimal control, the sufficient and necessary conditions for the existence and uniqueness of the solution to the indefinite backward stochastic Riccati equation （BSRE, for short） associated with H∞ robustness are derived. Then the sufficient and necessary conditions for the existence of the H2/H∞ control are given utilizing a pair of coupled stochastic Pdccati equations.

关键词： Stochastic H∞ control Stochastic H2/H∞ control Linear quadratic(LQ) optimal control Indefinite backward stochastic Riccati equation

Machine Learning for 5G and Beyond:From ModelBased to Data-Driven Mobile Wireless Networks

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china Communications 2019年第1期16卷 165-175页

作者： Tianyu wang Shaowei wang Zhi-Hua Zhou National Key Laboratory for Novel Software Technology Nanjing University School of Electronic Science and Engineering Nanjing University

During the past few decades,mobile wireless communications have experienced four generations of technological revolution,namely from 1 G to 4 G,and the deployment of the latest 5 G networks is expected to take place in *** fundamental question is how we can push forward the development of mobile wireless communications while it has become an extremely complex and sophisticated *** believe that the answer lies in the huge volumes of data produced by the network itself,and machine learning may become a key to exploit such *** this paper,we elaborate why the conventional model-based paradigm,which has been widely proved useful in pre-5 G networks,can be less efficient or even less practical in the future 5 G and beyond mobile ***,we explain how the data-driven paradigm,using state-of-the-art machine learning techniques,can become a promising *** last,we provide a typical use case of the data-driven paradigm,i.e.,proactive load balancing,in which online learning is utilized to adjust cell configurations in advance to avoid burst congestion caused by rapid traffic changes.

关键词： mobile wireless networks data-driven paradigm machine learning

Cataract extraction in eyes with Fuchs’endothelial dystrophy in china

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chinese Medical Journal 2005年第13期118卷 1127-1130页

作者： Ann Mei-chi chiu Shandong Eye Institute Qingdao 266071 China

It is a common belief that Fuchs' endothelial dystrophy predominantly affectsCaucasians but rarely Asians. However, in one Japanese study, primary corneal guttae (first stageof Fuchs ' dystrophy) were found in four of 107 cataract patients. With the growing popularity ofphacoemulsification in china in the past decade, the increased incidence of endothelialdecompensation may be due to learning curves among surgeons as well as that the prevalence of Fuchs'dystrophy among chinese is higher than we thought. Low index of suspicion for Fuchs' dystrophy mayresult in missing of diagnosis and occurrence of endothelial decompensation, particularly when noextra protection is provided for endothelial cells during phacoemulsification. This study was aimedat improving our knowledge about Fuchs' dystrophy among chinese population and reminding surgeons ofextra endothelial protection during cataract surgery for patients with Fuchs' dystrophy.

关键词： fuchs' endothelial dystrophy cataract extraction phacoemulsification

On Robustness of Orbit Spaces for Partially Hyperbolic Endomorphisms

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chinese Annals of Mathematics,Series B 2016年第6期37卷 899-914页

作者： Lin wang College of Mathematics and Information Science Hebei Key Laboratory of Computational Mathematics and ApplicationsHebei Normal University

In this paper, the robustness of the orbit structure is investigated for a partially hyperbolic endomorphism f on a compact manifold M. It is first proved that the dynamical structure of its orbit space （the inverse limit space） M^f of f is topologically quasi-stable under C^0-small perturbations in the following sense： For any covering endomorphism g C^0-close to f, there is a continuous map φ from M^9 to Π-∞^∞ M such that for any {yi}i∈z∈φ（M^9）, yi＋1 and f（yi） differ only by a motion along the center direction. It is then proved that f has quasi-shadowing property in the following sense： For any pseudo-orbit {xi}i∈z, there is a sequence of points {yi}i∈z tracing it, in which yi＋1 is obtained from f（yi） by a motion along the center direction.

关键词： Partially hyperbolic endomorphism Orbit space Quasi-stability Quasi-shadowing

Estimates of Some Integral Operators with Bounded Variable Kernels on the Hardy and Weak Hardy Spaces over R^n

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Acta Mathematica Sinica,English Series 2016年第4期32卷 411-438页

作者： Hua wang College of Mathematics and Econometrics Hu'nan University

In this paper,we first introduce Lσ1-（log L）σ2 conditions satisfied by the variable kernelsΩ（x,z） for 0≤σ1≤1 and σ2≥*** these new smoothness conditions,we will prove the boundedness properties of singular integral operators TΩ,fractional integrals TΩ,α and parametric Marcinkiewicz integrals μΩρ with variable kernels on the Hardy spaces Hp（Rn） and weak Hardy spaces WHP（Rn）.Moreover,by using the interpolation arguments,we can get some corresponding results for the above integral operators with variable kernels on Hardy-Lorentz spaces Hp,q（Rn） for all p 〈 q 〈 ∞.

关键词： Singular integral operators fractional integrals parametric Marcinkiewicz integrals variable kernels Hardy spaces H^p(R^n) weak Hardy spaces WH^p(R^n) Hardy-Lorentz spaces Hp,q(Rn)