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A luminescence molecular switch via modulation of PET and ICT processes in DCM system

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Science China Chemistry 2017年第5期60卷 607-613页

作者： Jinfeng Yang Meng Li lihua kang Weihong Zhu Shanghai Key Laboratory of Functional Materials Chemistry Key Laboratory for Advanced Materials and Institute of Fine ChemicalsSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan College of Chemistry and Chemical EngineeringShihezi UniversityShihezi 832000China School of Environmental Science and Engineering North China Electric Power UniversityBaoding 071003China

A novel versatile dicyanomethylene-4H-pyran （DCM） based derivative bearing ferrocenyl group （DCM-N-Fc） is designed as modulator to construct ＂off-on＂ logic operation. The optical properties of DCM-N-Fc are characterized by absorption and steady-state fluorescence technique, showing that the fluorescence from DCM ehromophore via intramolecular charge transfer （ICT） is strongly quenched by photoinduced electron transfer （PET） process from ferrocene moiety. In contrast with the references （DCM-N and DCM-Fc）, the fluorescence of DCM-N-Fc can be triggered by oxidizing ferrocenyl unit either chemically or electrochemically, exhibiting a characteristic emission modulation at around 610 nm with an electrofluorochromic behavior. Furthermore, the free energy and the fluorescence lifetime in the PET path verify the thermodynamic feasibility. Cyclic voltammetry, absorption spectroscopy, time-resolved fluorescence as well as DFT calculation have been used to elaborate the manipulation via both PET and ICT processes.

关键词： dicyanomethylene-4H-pyran luminescence redox switch ferrocene

CLDASSD:Reconstructing Fine Textures of the Temperature Field Using Super-Resolution Technology

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Advances in Atmospheric Sciences 2022年第1期39卷 117-130页

作者： Ruian TIE Chunxiang SHI Gang WAN Xingjie HU lihua kang Lingling GE Institute of Aerospace Information Space Engineering UniversityBeijing 101400China National Meteorological Information Center China Meteorological AdministrationBeijing 100081China

Before 2008,the number of surface observation stations in China was ***,the surface observation data were too sparse to effectively support the High-resolution China Meteorological Administration’s Land Assimilation System(HRCLDAS)which ultimately inhibited the output of high-resolution and high-quality gridded *** paper proposes a statistical downscaling model based on a deep learning algorithm in super-resolution to research the above ***,we take temperature as an *** model is used to downscale the 0.0625°×0.0625°,2-m temperature data from the China Meteorological Administration’s Land Data Assimilation System(CLDAS)to 0.01°×0.01°,named *** performed quality control on the paired data from CLDAS and HRCLDAS,using data from 2018 and *** was trained on the data from 31 March 2018 to 28 February 2019,and then tested with the remaining ***,extensive experiments were conducted in the Beijing-Tianjin-Hebei region which features complex and diverse *** the HRCLDAS product and surface observation data as the"true values"and comparing them with the results of bilinear interpolation,especially in complex terrain such as mountains,the root mean square error(RMSE)of the CLDASSD output can be reduced by approximately 0.1℃,and its structural similarity(SSIM)was approximately 0.2 *** can estimate detailed textures,in terms of spatial distribution,with greater accuracy than bilinear interpolation and other sub-models and can perform the expected downscaling tasks.

关键词： statistical downscaling deep learning temperature field high-resolution reconstruction

An intelligent near-infrared light activatable nanosystem for accurate regulation of zinc signaling in living cells

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Nano Research 2017年第9期10卷 3068-3076页

作者： Wei Li Zhen Liu Zhaowei Chen lihua kang Yijia Guan Jinsong Ren Xiaogang Qu Laboratory of Chemical Biology and State Key Laboratory of Rare Earth Resources Utilization Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China University of Chinese Academy of Sciences Beijing 100039 China Stem Cell and Cancer Center First Affiliated Hospital Jilin University Changchun 13000 I China

Accurate regulation of cellular zinc signaling is imperative to decipher underlying zinc functions and develop new therapeutic agents. However, the ability to modulate zinc in a spatiotemporal manner remains elusive. We herein report an intelligent spiropyran-upconversion (SP-UCNPs) based nanosystem that enables near-infrared (NIR) light-controlled zinc release at precise times and locations. The magnitude of zinc release can be simply manipulated by varying the duration of NIR irradiation. Moreover, the utilization of NIR light not only showed little damage to cells but also significantly improved penetration depth. By evaluating activity of a model protein, phosphatase 2A, we further validated zinc signaling activation. Importantly, our strategy may be broadly applicable to other types of metal ions, like the ubiquitous second messenger calcium. More importantly, our strategy can potentially enable the precise control of specific signaling pathways of metal ions while minimizing cellular damage, facilitating the advanced manipulation of cellular dynamics.

关键词： nanocarrier zinc upconversion spiropyran cellular manipulation

CFD-DEM study on the synergistic effect of coke consumption and particle dynamics in the blast furnace raceway

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Particuology 2024年第6期89卷 270-278页

作者： Peng Xu Peng Han Zhijun He Xizhong An kang Sun lihua Gao Key Laboratory of Green Low-Carbon and Intelligent Metallurgy School of Materials and MetallurgyUniversity of Science and Technology LiaoningAnshan 114000China Key Laboratory for Ecological Metallurgy of Multimetallic Mineral of Ministry of Education School of MetallurgyNortheastern UniversityShenyang110819China

In this study,the gas-solid flow process in the blast furnace raceway is numerically simulated using coupled computational fluid dynamics and the discrete element method(CFD-DEM).The coke reaction kinetics data are imported into the DEM model to reproduce the consumption process of each coke *** effects of inlet gas velocity and angle on the morphology of the raceway,coke consumption rate,coke bed temperature,and particle size distribution in the blast process are systematically investigated and *** results show that the consumption of coke particles promotes the formation of raceways during the blast *** the same time,a coke mixture layer is produced at the edge of the *** higher the inlet gas velocity,the thicker the coke mixture layer in the middle and upper parts of the raceway region,and the larger the proportion of small particles in the coke mixture *** effect of the inlet gas angle on the raceway region is less than the inlet gas ***,with the increase in the inlet gas angle,the high-temperature region of the coke bed extends downward gradually,which is conducive to activating the hearth.

关键词： Blast furnace Raceway Multiphase flow CFD-DEM Modeling

Effects of the sand content of muddy water content on one-dimensional vertical infiltration characteristics and dense layer formation characteristics

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International Journal of Agricultural and Biological Engineering 2024年第1期17卷 172-179页

作者： Shouxuan kang Liangjun Fei Yun Zhong lihua Liu State Key Laboratory of Eco-hydraulics in Northwest Arid Region Xi’an University of TechnologyXi’an 710048China Institute of Water Resources and Hydro-electric Engineering Xi’an University of TechnologyXi’an 710048China Engineering Research Center of Eco-environment in Three Gorges Reservoir Region Ministry of EducationChina Three Gorges UniversityYichang 443002HubeiChina School of Water Conservancy and Hydroelectric Power Hebei University of EngineeringHandan 056038HebeiChina

Muddy water irrigation,an effective water-saving irrigation method,has been widely used in the Yellow River Basin in *** investigate the effect of sand content on water infiltration and dense layer formation under one-dimensional vertical infiltration of muddy water,muddy water infiltration experiments were performed in the laboratory,and five sand contents of muddy water(S=0%,3%,6%,9%,and 12%)were *** were established to describe the relationship between the cumulative infiltration amount[I(t)]and the infiltration duration(t);the relationship among the migration distance of the wetting front(Z),S,and t;the thickness of the sedimentary layer[H(t)];and the relationship between S and *** results revealed that I(t)and Z decreased significantly with the increase of sand contents,while H(t)increased significantly with the increase of sand contents.I(t)and Z were in the range of 7 cm and 20 cm for each treatment,*** variation in I(t)with t fitted Kostiakov and Philip models,and the coefficients of determination were all greater than *** the increase in S,the infiltration coefficient gradually decreased,the infiltration index gradually increased,and the sorptivity gradually *** particle composition of the sedimentary layer was similar to that of the argillaceous sediment,and the content of particles with a size of less than 2 mm in the sedimentary layer was lower than that of the argillaceous *** with the original soil,the content of particles with a size of less than 0.05 mm and physical clay particles(diameter less than 0.01 mm)in the soil with an infiltration depth of 0-2 cm *** retention layer was from the topsoil to the infiltration depth of approximately 2 *** study can provide a scientific basis for further research on soil infiltration mechanisms under muddy water.

关键词： muddy water sand content dense layer cumulative infiltration wetting front transport deposit layer thickness

人工智能延续护理平台的构建及在脑卒中病人中的应用研究

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循证护理 2024年第13期10卷 2412-2415页

作者：李洪艳何方方李祥康丽华黄长静徐州市康复医院江苏221009 徐州市中心医院

目的:探讨人工智能延续护理平台在脑卒中病人中的应用效果。方法:便利抽取徐州市康复医院康复科及徐州市中心医院神经内科2022年收治的210例脑卒中病人作为研究对象,其中双日收治的108例病人纳入观察组,实施基于人工智能延续护理平台的... 详细信息

目的:探讨人工智能延续护理平台在脑卒中病人中的应用效果。方法:便利抽取徐州市康复医院康复科及徐州市中心医院神经内科2022年收治的210例脑卒中病人作为研究对象,其中双日收治的108例病人纳入观察组,实施基于人工智能延续护理平台的干预,单日收治的102例病人纳入对照组,实施常规护理干预。比较两组干预前后改良Barthel指数、Fugl-Meyer运动功能评定量表(FMA)和自我照护能力评分。结果:两组出院后1、3、6个月Barthel指数评分比较差异有统计学意义(P<0.05);两组出院后3、6个月FMA评分比较差异有统计学意义(P<0.05),两组出院6个月自我照护能力比较差异有统计学意义(P<0.05)。结论:人工智能延续护理平台的应用有助于脑卒中病人生活自理能力及自我照护能力的提高,促进病人运动功能康复。

关键词：人工智能脑卒中自我照护能力运动功能延续护理

Game-theoretic multi-agent motion planning in a mixed environment

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Control Theory and Technology 2024年第3期22卷 379-393页

作者： Xiaoxue Zhang lihua Xie School of Electrical and Electronic Engineering Nanyang Technological UniversitySingapore City 639798Singapore

The motion planning problem for multi-agent systems becomes particularly challenging when humans or human-controlled robots are present in a mixed *** address this challenge,this paper presents an interaction-aware motion planning approach based on game theory in a receding-horizon manner Leveraging the framework provided by dynamic potential games for handling the interactions among agents,this approach formulates the multi-agent motion planning problem as a differential potential game,highlighting the effectiveness of constrained potential games in facilitating interactive motion planning among ***,online learning techniques are incorporated to dynamically learn the unknown preferences and models of humans or human-controlled robots through the analysis of observed *** evaluate the effectiveness of the proposed approach,numerical simulations are conducted,demonstrating its capability to generate interactive trajectories for all agents,including humans and human-controlled agents,operating within the mixed *** simulation results illustrate the effectiveness of the proposed approach in handling the complexities of multi-agent motion planning in real-world scenarios.

关键词： Motion planning Differential potential game Multi-agent systems Constrained potential game

木麻黄根瘤内生菌——弗兰克氏菌对青枯病菌的抑制作用研究

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林业科学研究 1999年第1期12卷 42-46页

作者：康丽华中国林业科学研究院热带林业研究所

试验结果揭示了木麻黄弗兰克氏菌和木麻黄根瘤浸提液能抑制青枯菌生长，弗兰克氏菌Ｏｒ９３０２和９０２１菌株的抑菌效果比其它供试菌株高；粗枝木麻黄的根瘤浸提液抑菌效果较山地木麻黄和普通木麻黄的抑菌效果好。

关键词：木麻黄弗兰克氏菌抑菌效果青枯病菌微生物

On asymptotic stability of the 3D Boussinesq equations without heat conduction

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Science China Mathematics 2024年第2期67卷 253-280页

作者： lihua Dong Yongzhong Sun School of Physical and Mathematical Sciences Nanjing Tech UniversityNanjing 211816China Department of Mathematics Nanjing UniversityNanjing 210093China

We investigate the asymptotic stability of the solutions to Boussinesq equations without heat conduction with the initial data near a specific stationary solution in the three-dimensional domain Ω=R^(2)×(0,1).It is shown that the solution starting from a small perturbation to the stationary solution converges to it with explicit algebraic rates as time tends to infinity.

关键词： Boussinesq equations stationary solutions asymptotic stability decay rates