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Small modifications of endo-functionalized cavities lead to large changes in molecular interaction in water

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Science China Chemistry 2025年第1期 369-376页

作者： Song-Meng wang Hao Nian Yan-Fang wang Li-Shuo Zheng yu-Tao Zheng yi-wei Dong Liping Huang Xiaoping wang wei Jiang Liu-Pan Yang Department of Chemistry Southern University of Science and Technology School of Chemistry and Pharmaceutical Sciences State Key Laboratory for Chemistry and Molecular Engineering of Medicinal ResourcesGuangxi Normal University School of Pharmaceutical Science Hengyang Medical School University of South China

Studying molecular recognition in aqueous environments is crucial for understanding biological processes. Herein, we present a series of N-doped endo-functionalized anthracene-based cavities by introducing inward-directed pyridine units. The subtle modifications can significantly affect the binding properties of these receptors, which is similar to the mutations in biological systems. Combining theoretical calculations and molecular recognition experiments demonstrated that these “mutations” have an impact on the hydrophobicity and charge distribution of the hosts, consequently significantly influencing molecular *** is crucial for understanding the intricate mechanisms of molecular-level interactions in biological receptors.

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Discovery of a new family member of arsenic–vanadium polyoxometalates with high catalytic performance for one-pot coupling of CO2, epoxides and amines

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Tungsten 2025年第1期 80-87页

作者： Fang-Qian wang yin Zhang wei-wei wang Mei-Qian Fu Hong-Bing Mo wei-Dong yu Chao Liu jun Yan College of Chemistry and Chemical Engineering Central South University junior Education Department Changsha Normal University School of Science Hunan University of Technology and Business

Arsenic-vanadium polyoxometalates（POMs） represent a family of tremendous potential catalysts owing to their peculiar physical and chemical *** in CO2conversion,using POMs to catalyze the conversion of CO2and epoxide into chemical intermediates is the research ***,A new family number of arsenic-vanadium POMs,[N（CH3）4]4[As8V12O38（H2O）]·2H2O({As8V12O38}),was reported and characterized by single-crystal X-ray diffraction,fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,*** from other allotropicity,{As8V12O38}shows a different structure pattern with an I-43d *** obtained {As8V12O38} was employed as a catalyst for the *** initial catalytic reaction confirmed that {As8V12O38} can catalyze the formation of epoxy carbonate by using 1.01 kPa CO2and epoxide at 70℃.Furtherly,when added amine in the catalytic system,oxazolidinone could be obtained by high yields,which provides an efficient way to convert CO2into profitable ***,a possible catalytic reaction mechanism was proposed by using different characterization analyses.{As8V12O38} first catalyzes the epoxide and CO2to form an epoxy carbonate and then catalyzes epoxy carbonate and benzylamine into oxazolidinone.

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Asymmetrical Bell state analysis for photon-atoms hybrid system

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Science China(Physics,Mechanics & Astronomy) 2019年第12期62卷 10-18页

作者： yi-Lin Liu Miao-wei wang Chun-yu Bai Tie-jun wang School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of Information Photonics and Optical Communications Beijing University of Posts and TelecommunicationsBeijing 100876China

Bell-state analysis(BSA) has great application in the quantum communication. To our best knowledge, the current works are devoted to the physical realization of symmetrical 2×2-dimensional or 2^N× 2^N-dimensional 2-qudit BSA, and there is no work focused on the physical realization of the asymmetrical high-dimensional(for example 3×4-dimensional 2-qudit) Bell-states complete analysis. In this paper, by using the nonlinear interaction between the atoms and photons, we propose a scheme to completely distinguish the asymmetrical 3×4-dimensional 2-qudit Bell states of a hybrid system. We use the quantum information splitting, which is exploited to resolve the degree-mismatch issue in the quantum state sharing schemes, as an example to show the application of the asymmetrical BSA. Finally, we discuss its possible realization with current experimental techniques. Our asymmetrical high-dimensional BSA protocol may pave a new way for high-capacity long-distance quantum communication.

关键词： quantum optics quantum information processing quantum cryptography

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Impact of anthropogenic activities on vegetation dynamics in a reservoir area: model establishment and a case study of Longkaikou Reservoir in China

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Journal of Mountain Science 2021年第7期18卷 1823-1836页

作者： YANG wei PEI jun CAI Yan-peng yi yu-jun State Key Laboratory of Water Environment Simulation School of EnvironmentBeijing Normal UniversityBeijing 100875China Binjiang Branch Agency of Ecology and Environment of HangzhouHangzhou 310053China

Vegetation in hot and arid valleys is a crucial indicator of ecosystem health,but is vulnerable to human activities and environmental *** the Longkaikou Reservoir in the Jinsha River in southwestern China as a case study,we developed a spatially explicit model that combined the plant growth,fruiting,seed dispersal,and seed germination stages to reveal the potential impact of multiple human activities(reservoir construction,logging,grazing,and aerial seeding) on the vegetation dynamics of Dodonaea viscosa and Pinus *** reservoir construction,the grassland area of 68 km^(2) in 2003 decreased to 24 km^(2) in 2018,replaced by forest,shrubland,and bodies of water,and the precipitation increased during the dry season,which indicated the improvement of the local plant and soil *** model predicted that when soil moisture decreased by more than 20% compared to current levels,the area of *** increased greatly at low elevations;however,when at higher soil moisture,*** would occupy more of the study *** and grazing would slightly change the spatial pattern of vegetation and delay *** communities from achieving stability by directly reducing plant *** such as aerial seeding would increase the total area by 13.13 km^(2) and 8.09 km^(2) of two plants,respectively,and accelerate the stabilization of plant *** effects of multiple human activities on vegetation may counteract each other;for example,logging decreased the *** area whereas aerial seeding increased it,and plant biomass changed in response to this *** the complex relationships between vegetation and human impacts,our study provides a scientific basis for vegetation restoration and ecological security in this hot and arid valley.

关键词： Spatially explicit model Vegetation dynamics Human activities Longkaikou Reservoir

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Effect of the Boundary on the Dynamics of Solitary Waves

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Chinese Physics Letters 1996年第7期13卷 481-484页

作者： wang jun-yi wang wei wang Ben-ren wei Rong-jue Institute of Acoustics Nanjing UniversityNanjing 210093 Department of Physics and Institute for Solid State Nanjing UniversityNanjing 210093

The effect of the boundary on the dynamics of solitary waves has been *** inverse scattering transformation for the solitary wave equation with boundary condition is treated by the reduction group *** effective potential of interaction between the solitary wave and the boundary is found to be same as the Morse *** physical mechanism of the soliton oscillation could be interpreted by our results.

关键词： potential theory solitary

Application of Omega vortex identification method in cavity buffeting noise

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Journal of Hydrodynamics 2021年第2期33卷 259-270页

作者： Yang-hui Zhang Xing-jun Hu wei Lan yi-chen Liu Mo wang Jing-yu wang State Key Laboratory of Automobile Simulation and Control Jilin UniversityChangchun 130025China

The cavity buffeting noise is related to the free shear layer oscillation and the periodic vortex shedding,where weak vortices coexist with strong vortices and the strong shear phenomenon also exists at the opening of the ***,it is of great significance to accurately capture vortices at the opening for the control of the cavity buffeting *** paper first compares the Omega vortex identification method with the Q andλ2criteria based on the large eddy simulation(LES)of the backward-facing step flow,and it is found that the Omega method enjoys the following advantages:it is not sensitive to a moderate threshold change andΩ=0.52 can be used as a fixed threshold,it can capture both the strong and weak vortices at the same time;and it will not be contaminated by the *** the Omega(Ω)method is applied to the LES of the cavity buffeting noise:the mechanism of the cavity buffeting noise is studied based on a simple cavity model firstly,and then the effects of the incoming boundary layer thicknesses and the incoming boundary layer shapes on the cavity buffeting noise are *** results show that:theΩmethod clearly captures the processes of the vortex generation,development,collision and fragmentation,verifying that the generation of the cavity buffeting noise is related to the free shear layer oscillation and the periodic vortex shedding;as the thickness of the incoming boundary layer increases,the free shear layer becomes more stable and the Helmholtz resonance is avoided effectively,thereby the cavity buffeting noise is reduced effectively,adding a convexity upstream of the cavity opening to interfere the shape of the incoming boundary layer to reduce the acoustic feedback effect can reduce the cavity buffeting noise effectively.

关键词： Vortex identification Omega(Ω) buffeting noise boundary layer

Experimental Studies on Cyclic Shear Behavior of Steel-Clay Interface Under Constant Normal Load

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China Ocean Engineering 2023年第3期37卷 519-524页

作者： yu Shi-wen wang Jie LIU jun-wei wang Teng School of Petroleum Engineering China University of Petroleum(East China)Qingdao 266580China China Communications Third Harbor Engineering Co. Ltd.ShanghaiChina School of Civil Engineering Qingdao University of TechnologyQingdao 266520China

The degradation of the shear stress between pile-clay interface caused by undrained cyclic jacking affects the jacking force.A series of large displacement monotonic shear,cyclic shear and post-cyclic monotonic steel plate-clay interface shear te sts were performed under the constant normal load(CNL)condition to inve stigate the effects of normal stre ss,cyclic amplitude,and number of cycles on a steel plate-clay interface using the GDS multi-function interface shear *** on the experimental results,in monotonic shear tests,change of shear stress took place in the specimen,the shear stress rapidly reached the peak value at shear displacement of 1 mm,and then abruptly decreased to the residual *** cyclic shear te sts,accumulated displacement was a better parameter to describe the soil degradation characteristics,and the degradation degree of shear stress became greater with the increasing of normal stress and accumulated *** stress in post-cyclic monotonic shear tests did not generate a peak value and was lower than that in monotonic shear tests under the same normal *** soil was completely disturbed and reached the residual strength when the cumulative displacement approached 6 *** empirical equation to evaluate shear stress degradation mechanism was formulated and the procedure of parameter identification was presented.

关键词： cyclic shear steel-clay interface constant normal load cumulative displacement residual strength

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Properties of ten-year-aged argon oxygen decarburization stainless steel slag

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Journal of Iron and Steel Research International 2021年第10期28卷 1233-1242页

作者： Ya-jun wang Ya-nan Zeng jun-guo Li yu-zhu Zhang wei wang College of Metallurgy and Energy North China University of Science and TechnologyTangshan063210HebeiChina School of Metallurgy Northeastern UniversityShenyang110819LiaoningChina

The characteristics of argon oxygen decarburization slag(AODS)for smelting stainless steel that has been aged for 10 years were *** types of AODSs distributed at three positions in a slag heap were sampled for comparison *** analysis,mineral phase identification,thermogravimetric analysis,and micromorphology analysis were used to study the element migration trends and carbonation behavior of AODS after long-term *** leaching tests were performed to study the chromium leachability of the aged *** results show that during the long-term aging process,the AODS heap had undergone oxidation and carbonation,accompanied by element migration and mineralogical *** surface slag had the highest degree of carbonation but the weakest chromium *** chemical composition of the middle slag was the closest to that of the original *** the bottom steel slag,in addition to magnesium,certain depositions of other elements were *** matrix phases in the aged slag were dicalcium silicate and merwinite,and the chromium was mainly wrapped in these matrix phases in the form of oxides,spinels,or *** the combined effects of carbonation and oxidation,the leaching characteristics of the chromium in the aged slag varied greatly depending on the *** bottom slag had the strongest chromium leachability,and the hexavalent chromium had long-term continuous leachability.

关键词： Argon oxygen decarburization slag Aging Chromium Leaching Mineral phase

Investigation on strong nonlinear interactions between underwater explosion and water surface based on compressible multiphase flow with phase transition

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Journal of Hydrodynamics 2023年第2期35卷 351-364页

作者： jun yu Hai-kun wang Zhen-xin Sheng yi Hao China Ship Scientific Research Center Wuxi214082China Taihu Laboratory of Deep-sea Technological Science Wuxi214082China

The strong nonlinear interactions between underwater explosion and water surface were numerically investigated using a phase transition model based on a four-equation system,which can deal with the complex deformable interface among different phases,including water,air,explosion bubble,and *** numerical method is verified by comparing the numerical results with experimental results,and good agreements are *** study considers an ideal sine wave for simulating the shape of water *** examples of different detonation depths of charge are *** each example,the first case is the basic simulation without surface wave,and the other three cases are the simulations with sine waves of different *** characteristics of the interactions,such as shock wave propagation,explosion bubble expansion,and the generation,development,and collapse of cavitation,are observed in the numerical *** capturing the detailed density and pressure contours during the interaction process,we can better understand the underlying mechanisms of the explosion bubble,cavitation,and surface *** numerical results demonstrate that geometric nonlinearity impacts cavitation evolution and the explosion bubble movement ***,the secondary cavitation phenomenon has been found in the cases without surface wave,and its fundamental physical mechanism is presented in *** present results can expand the existing database of multiphase flow in the underwater explosion and provide an insight into the strong nonlinear interaction between the underwater explosion and water surface.

关键词： Underwater explosion compressible multiphase flow phase transition model cavitation water surface