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Radar Data Assimilation with EnKF-IAU:Impacts on Dynamical Structure and Short-term Prediction of Landfalling Typhoon Bebinca(2024) 认领 引用
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作者 Zhaoyang HUO Wei HUANG +3 位作者 Gengjiao YE Mengjuan LIU Wanchen WU Yubao LIU 《Advances in Atmospheric Sciences》 SCIE CAS CSCD 2026年第6期1226-1242,共17页
Landfalling tropical cyclones(LTCs)undergo rapid structural adjustments and complex nonlinear interactions in coastal regions,making short-term prediction of heavy rainfall and damaging winds particularly challenging.... Landfalling tropical cyclones(LTCs)undergo rapid structural adjustments and complex nonlinear interactions in coastal regions,making short-term prediction of heavy rainfall and damaging winds particularly challenging.Conventional intermittent data assimilation often introduces dynamical imbalances into the analysis fields,which may further deteriorate subsequent forecasts.This study investigates the landfall process of Typhoon Bebinca(2024)and systematically evaluates a set of ensemble-based assimilation experiments conducted within an Incremental Analysis Update(IAU)framework,incorporating multiple observation types,including radar reflectivity,Doppler radial velocity,and surface measurements.The results show that the IAU technique,through the gradual application of analysis increments within a four-dimensional time window,effectively suppresses initialization shocks,alleviates spurious dynamical imbalance,and preserves flowdependent coordination.The IAU-based framework efficiently retains observational information,optimizes vortex structure,intensifies the warm core,and promotes the formation of a vertically coherent subsidence column within the eye region,thereby strengthening the secondary circulation.In addition,the IAU scheme also helps establish a more consolidated and axisymmetric moisture core,accompanied by a sea-level pressure field with smoother and dynamically coherent gradient structures,indicating a more physically balanced thermodynamic–dynamic coupling.These balanced analyses translate into more accurate forecasts of track,intensity evolution,and landfall-induced precipitation.Overall,the IAU-enhanced ensemble assimilation system substantially improves the physical consistency of storm analyses and significantly increases the short-term predictability of LTC track,rainfall,and wind hazards over coastal urban regions. 展开更多
关键词 data assimilation incremental analysis update landfalling tropical cyclones model imbalances dynamical structure
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Boosting the intermittent alkaline seawater electrolysis stability up to 10,000h via in-situ formation of dynamically passivating structures 认领 引用
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作者 Bo Chen Peiyu Duan +1 位作者 Ying Zhang Lianhui Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2026年第1期4-6,共3页
With the in-depth implementation of sustainable development strategies,hydrogen energy as a clean energy source is receiving increasing attention[1,2].Among the various methods of hydrogen production,the electrocataly... With the in-depth implementation of sustainable development strategies,hydrogen energy as a clean energy source is receiving increasing attention[1,2].Among the various methods of hydrogen production,the electrocatalytic decomposition of abundant seawater into hydrogen utilizing renewable energy has emerged as a green and promising approach.However,natural seawater contains complex components,such as halide ions,which lead to the corrosion of catalysts or the occurrence of competitive side reactions during the electrolysis process[3]. 展开更多
关键词 intermittent alkaline seawater electrolysis electrocatalytic decomposition renewable energy clean energy source sustainable development strategies halide ionswhich sustainable development strategieshydrogen energy dynamically passivating structures
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Tuning spin-density separation via finite-range interactions:dimensionality-driven signatures in dynamic structure factors 认领 引用
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作者 Xiaoran Ye Yi Zhang +1 位作者 Ziheng Zhou Zhaoxin Liang 《Communications in Theoretical Physics》 SCIE CAS CSCD 2026年第2期179-192,共14页
Spin-density(charge)separation,marked by distinct propagation velocities of spin and density excitations,epitomizes strong correlations,historically confined to one-dimensional(1D)systems.The recent experimental work ... Spin-density(charge)separation,marked by distinct propagation velocities of spin and density excitations,epitomizes strong correlations,historically confined to one-dimensional(1D)systems.The recent experimental work of Dhar et al(2025 Nature 64253),using a weakly interacting 3D Bose-Einstein condensate of 133Cs atoms confined in a 2D optical lattice to realize spin-density separation and demonstrate boson anyonization,motivates a deeper exploration into how dimensionality and interactions govern quantum correlations.In this work,we investigate this in two-component bosonic mixtures with finite-range interactions,probing 1D and 3D dynamics.Using path integral effective field theory within the one-loop approximation,we derive analytical expressions for zero-temperature ground-state energy and quantum depletion,seamlessly recovering contact interaction results in the contact limit.By crafting an effective action for decoupled density and spin modes,we compute dynamic structure factors(DSFs),revealing how finite-range interactions sculpt spin-density separation.A pivotal finding is the dimensionality-driven divergence in DSF peak dynamics:in 1D,peaks ascend to higher frequencies with increasing interaction strength,yielding sharp responses;in 3D,peaks descend to lower frequencies,with broader density wave profiles.These insights highlight dimensionality's critical role in collective excitations and provide a robust theoretical blueprint for probing interaction-driven quantum phenomena via Bragg spectroscopy,paving new pathways for the exploration of dimensionally tuned quantum correlations in ultracold quantum gases. 展开更多
关键词 ultracold quantum gas effective field theory dynamical structure factor quantum depletion spin-density(charge)separation
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Computational Analysis of Autonomous Underwater Vehicles(AUVs)Structural Dynamics and Impact Forces During High Speed Water Entry 认领 引用
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作者 YU Yi-lan PAN Guang +1 位作者 SHI Yao HUANG Qiao-gao 《China Ocean Engineering》 SCIE EI CSCD 2026年第3期507-520,共14页
Understanding the structural response of Autonomous Underwater Vehicles(AUVs)during water entry is essential for ensuring operational safety and reliability.This paper introduces a bidirectional fluid-structure coupli... Understanding the structural response of Autonomous Underwater Vehicles(AUVs)during water entry is essential for ensuring operational safety and reliability.This paper introduces a bidirectional fluid-structure coupling numerical algorithm to analyze the structural response characteristics of an AUV during water entry at various speeds and angles.The numerical method’s accuracy is verified through experimental data.The investigation focuses on the water entry process within the velocity range of 50 to 200 m/s and entry angles between 60°and 90°.The study examines the influence of structural position,entry velocity,and entry angle on the structural response,while analyzing stress and strain at specific locations on the circular end face,cylindrical side,and circular tail surface of the AUV.The findings demonstrate that at entry speeds exceeding 100 m/s,the structure undergoes strain,with entry velocity exhibiting a more pronounced effect on axial force compared with entry angle.A reduced entry angle decreases the initial water contact duration and minimizes stress concentration.These results provide significant theoretical foundations for AUV structural design. 展开更多
关键词 AUV structural dynamics stress propagation water entry transmedia FSI
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Controlling the dynamic structural changes of catalysts for COxhydrogenation 认领 引用
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作者 Hangjie Li Jun Bao +8 位作者 Xiaodong Yi Peipei Zhang Shuangqin Zeng Junyi Zhang Haisheng Liu Xionghou Gao Qinghe Yang Hai Wang Liang Wang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第5期644-655,I0016,共12页
Hydrogenation of CO and CO2(COx)into value-added chemicals and fuels is a central process for the sustainable utilization of carbon resources,where the dynamic structural changes of the catalysts play a crucial ... Hydrogenation of CO and CO2(COx)into value-added chemicals and fuels is a central process for the sustainable utilization of carbon resources,where the dynamic structural changes of the catalysts play a crucial role in determining catalytic performances.This review summarizes recent progress in regulating catalyst dynamic changes to achieve efficient COxhydrogenation.We highlight the crucial role of promoters in tuning the electronic and/or geometric structures of active sites,discuss the influence of supports in stabilizing metal nanoparticles,and emphasize the importance of reaction atmosphere engineering in suppressing or directing catalyst surface restructuring.These strategies efficiently modulate the catalyst dynamics,either by stabilizing the catalyst against undesirable restructuring or by harnessing dynamic restructuring to generate new active sites.As a result,enhanced activity,improved selectivity,and prolonged catalyst durability can be achieved.We anticipate that these concepts and insights discussed in this review will provide valuable guidance for the rational design of highly efficient catalysts for COxhydrogenation. 展开更多
关键词 COxhydrogenation Dynamic structural changes Metal nanoparticles Surface restructuring Catalytic performances
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Bromide-driven reorganization of lithium solvation shells enables dynamically decoupled ion transport and interfacial stability in semi-solid polymer electrolytes for lithium metal batteries 认领 引用
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作者 Li Niu Runhong Wei +2 位作者 Yanlei Zhang Jinhai You Michael Wübbenhorst 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2026年第2期531-540,I0012,共10页
The performance of polymer electrolytes in lithium metal batteries(LMBs)is often hindered by strong Li+-ligand coordination,which leads to tightly bound solvation shells and restricts ion transport by coupling it t... The performance of polymer electrolytes in lithium metal batteries(LMBs)is often hindered by strong Li+-ligand coordination,which leads to tightly bound solvation shells and restricts ion transport by coupling it to polymer segmental motion.In this study,a low-content ionic plasticizer additive1-butyl-3-dimethylimidazolium bromide(BMImBr)was introduced into the PVDF-HFP/LiTFSI/DMF matrix to modulate the Li+solvation environment.Unlike conventional dual-salt systems,the introduced Br-anions dynamically compete for Li+coordination,disrupting the rigid Li+-TFSI-/DMF solvation shell and constructing a"statistically labile and diffuse ionic cloud"characterized by reduced coordination numbers,weakened binding energies,and a more diffuse electrostatic potential landscape.This restructured solvation environment facilitates partially decoupled Li+transport,as evidenced by dielectric spectroscopy and molecular dynamics simulations.Furthermore,the in situ formation of a LiBr-rich solid electrolyte interphase(SEI)effectively stabilizes the Li-metal interface and significantly reduces interfacial resistance.As a result,the optimized polymer electrolyte delivers outstanding electrochemical performance,achieving a high ionic conductivity of 0.8×10-4 S/cm,ultra-stable symmetric cell cycling over 500 h,and superior capacity retention exceeding 94%after 150 cycles at 0.5 C.This study elucidates a dynamic ion transport mechanism driven by competitive anion coordination and provides a viable strategy for simultaneously addressing the conductivity-stability trade-off in solid-state lithium metal batteries. 展开更多
关键词 Dynamic solvation structure Segmental decoupling Polymer electrolyte LiBr-rich SEI Lithium metal batteries
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THEORETICAL MODEL AND NUMERICAL METHOD ON ONLINE IDENTIFICATION OF DYNAMICAL CHARACTERISTICS OF STRUCTURAL SYSTEM 认领 引用
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作者 姚志远 汪凤泉 ZHANGJing-hui 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2004年第8期957-962,共6页
An online method of identification of dynamic characteristics only using measured ambient response of structural dynamic system is widely focused on.The Ibrahim and ARMA (AutoRegressive Moving Average) methods are bas... An online method of identification of dynamic characteristics only using measured ambient response of structural dynamic system is widely focused on.The Ibrahim and ARMA (AutoRegressive Moving Average) methods are basic identification methods.A model on dynamic system suffered by random ambient excitation was researched into, and a subspace decomposition method being different from traditional harmonic retrieval method was introduced.Robustness and effectiveness of this approach on identification of vibration characteristics are demonstrated on numerical experiment. 展开更多
关键词 modal identification system identification structure dynamic system
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The Dynamical Characteristics and Wave Structure of Typhoon Rananim (2004) 认领 引用 被引量：5
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作者 明杰 倪允琪 沈新勇 《Advances in Atmospheric Sciences》 SCIE CAS 2009年第3期523-542,共20页
Typhoon Rananim （2004） was one of the severest typhoons landfalling the Chinese mainland from 1996 to 2004. It brought serious damage and induced prodigious economical loss. Using a new generation of mesoscale model... Typhoon Rananim （2004） was one of the severest typhoons landfalling the Chinese mainland from 1996 to 2004. It brought serious damage and induced prodigious economical loss. Using a new generation of mesoscale model, named the Weather Research and Forecasting （WRF） modeling system, with 1.667 km grid horizontal spacing on the finest nested mesh, Rananim was successfully simulated in terms of track, intensity, eye, eyewall, and spiral rainbands. We compared the structures of Rananim to those of hurricanes in previous studies and observations to assess the validity of simulation. The three-dimensional （3D） dynamic and thermal structures of eye and eyewall were studied based on the simulated results. The focus was investigation of the characteristics of the vortex Rossby waves in the inner-core region. We found that the Rossby vortex waves propagate azimuthally upwind against the azimuthal mean tangential flow around the eyewall, and their period was longer than that of an air parcel moving within the azimuthal mean tangential flow. They also propagated outward against the boundary layer inflow of the azimuthal mean vortex. Puthermore, we studied the connection between the spiral potential vorticity （PV） bands and spiral rainbands, and found that the vortex Rossby waves played an important role in the formation process of spiral rainbands. 展开更多
关键词 dynamical structure vortex Rossby wave spiral rainband typhoon
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F-structure model of overlying strata for dynamic disaster prevention in coal mine 认领 引用 被引量：10
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作者 Mu Zonglong Dou Linming +1 位作者 He Hu Fan Jun 《International Journal of Mining Science and Technology》 EI CAS 2013年第4期508-514,共7页
The rupture and movement scope of overlying strata upon the longwall mining face increased sharply as the exploitation scale and degree growing recently,and the spatial structure formed by fractured strata became much... The rupture and movement scope of overlying strata upon the longwall mining face increased sharply as the exploitation scale and degree growing recently,and the spatial structure formed by fractured strata became much more complex.The overlying strata above the working face and adjacent gobs would affect each other and move cooperatively because small pillar can hardly separate the connection of overlying strata between two workfaces,which leads to mining seismicity in the gob and induces rockburst disaster that named spatial structure instability rockburst in this paper.Based on the key stratum theory,the F-structure model was established to describe the overlying strata characteristic and rockburst mechanism of workface with one side of gob and the other side un-mined solid coal seam.The results show that F-structure in the gob will re-active and loss stability under the influence of neighboring mining,and fracture and shear slipping in the process of instability is the mechanism of the seismicity in the gob.The F-structure was divided into two categories that short-arm F and long-arm F structure based on the state of strata above the gob.We studied the underground pressure rules of different F-structure and instability mechanism,thus provide the guide for prevention and control of the F-structure spatial instability rockburst.The micro-seismic system is used for on-site monitoring and researching the distribution rules of seismic events,the results confrmed the existence and correct of F-spatial structure.At last specialized methods for prevention seismicity and rockburst induced by F-structure instability are proposed and applied in Huating Coal Mine. 展开更多
关键词 Overlying strata Spatial structure Dynamic disaster Key strata Seismicity
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Dynamic behavior of reinforced concrete frame structure during construction 认领 引用 被引量：5
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作者 田明革 易伟建 《Journal of Central South University of Technology》 2008年第3期418-422,共5页
The effects of concrete's time-variant elastic modulus,casting structural components,assembling temporary shoring framework system,and shock by operating construction equipment on dynamic behavior of the reinforce... The effects of concrete's time-variant elastic modulus,casting structural components,assembling temporary shoring framework system,and shock by operating construction equipment on dynamic behavior of the reinforced concrete frame structure during construction were investigated. The dynamic tests of an eight-storey reinforced concrete frame structure during full-scaled stages of the sixth storey construction cycle were carried out by ambient vibration. Natural frequencies,corresponding mode shapes and damping ratio were determined by power spectrum processing the tested signal data in frequency domain. The changes of frequencies,mode shapes and damping ratios at different construction stages were given. The results show that natural frequencies and modal damping ratios reach the maximum at stage of casting fresh concrete,especially for higher modes. Modal damping ratios at each construction stage are less than 5% of those during usage. 展开更多
关键词 structural dynamics ambient vibration structure during construction mode shape natural frequency modal damping ratio
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Dynamical Model Updating Based on Modal Tests with Changed Structure 认领 引用 被引量：1
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作者 王轲 杨健 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2014年第1期56-62,共7页
A new approach to modifying the stiffness and mass matrices of finite element models is presented to improve the calculation precision.By measuring the mode frequencies and shapes of both of the original and the new s... A new approach to modifying the stiffness and mass matrices of finite element models is presented to improve the calculation precision.By measuring the mode frequencies and shapes of both of the original and the new structures with changed stiffness and mass,the stiffness and mass matrices of the finite element model can be updated through matrices calculation and solving algebra equations.Taking a multi-freedom model as an example,the relation between the number of the modes and the correction precision of stiffness and mass matrix elements is researched.The facility and precision of the method are totally confirmed especially when the modeling error is known limited to a definite local range.The feasibility of the approach is proven by an effective engineering application to the model updating of a wing piece used in flutter test. 展开更多
关键词 finite element structural dynamics building model model updating modal analysis
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An Unstructured Finite Volume Method for Impact Dynamics of a Thin Plate 认领 引用 被引量：1
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作者 Weidong Chen Yanchun Yu 《Journal of Marine Science and Application》 2012年第4期478-485,共8页
The examination of an unstructured finite volume method for structural dynamics is assessed for simulations of systematic impact dynamics. A robust display dual-time stepping method is utilized to obtain time accurate... The examination of an unstructured finite volume method for structural dynamics is assessed for simulations of systematic impact dynamics. A robust display dual-time stepping method is utilized to obtain time accurate solutions. The study of impact dynamics is a complex problem that should consider strength models and state equations to describe the mechanical behavior of materials. The current method has several features, l） Discrete equations of unstructured finite volume method naturally follow the conservation law. 2） Display dual-time stepping method is suitable for the analysis of impact dynamic problems of time accurate solutions. 3） The method did not produce grid distortion when large deformation appeared. The method is validated by the problem of impact dynamics of an elastic plate with initial conditions and material properties. The results validate the finite element numerical data 展开更多
关键词 unstructured finite volume method structural impact dynamics large deformation strength models state equations
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Simulation Study on the Structure and Dynamics of Water in Sodium Tetrafluoroborate/Water 认领 引用
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作者 Guo-cai Tian Jian Li Yi-xin Hua 《Chinese Journal of Chemical Physics》 SCIE EI CAS 2009年第5期460-466,I0001,共7页
The microstructure, IR spectrum, as well as rotation dynamics of water molecule in sodium tetrafluoroborate （NaBF4）/water mixture at room temperatures were studied with molecular dynamics simulation. Different conce... The microstructure, IR spectrum, as well as rotation dynamics of water molecule in sodium tetrafluoroborate （NaBF4）/water mixture at room temperatures were studied with molecular dynamics simulation. Different concentrations of water （6.25%, 25.0%, 50.0%, 75.0%, 90.0%, and 99.6%） in NaBF4/water mixture were simulated to understand the structure and dynamics. It was shown that water molecules tend to be isolated from each other in mixtures with more ions than water molecules in both liquids. With increase of the molar fraction of water in the mixture, the rotation bands and the bending bands of water display red shift whereas the O-H stretch bands show blue shift, and the decay of the reorientation correlation function becomes slower. This suggests that the molecules are hindered and their motions are difficult and slow, due to the hydrogen-bond interactions and the inharmonic interactions between the interor intra-molecular modes. 展开更多
关键词 Sodium tetrafluoroborate/water mixture Structure and dynamics IR spectrum Reorientation dynamics Time correlation function Molecular dynamics simulation
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ANALYSIS OF DYNAMIC STABILITY OF SUBMERGED STRUCTURE 认领 引用 被引量：2
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作者 Qu Naisi , Yang Chunqiu and Tao Zhengguo Associate Professor, Dalian University of Technology, Dalian, Engineer, Wuxi 706 Research Institute, Wuxi 《China Ocean Engineering》 SCIE EI 1990年第2期209-220,共12页
The submerged structure is basically a large three-dimensional structure of few statically redundant members. The structure is subjected to vertical dead and live loads in addition to the wave forces. An analysis of d... The submerged structure is basically a large three-dimensional structure of few statically redundant members. The structure is subjected to vertical dead and live loads in addition to the wave forces. An analysis of dynamic stability of the submerged structure without damping has been made by J. Thomas and Abbas (1980). In this paper the analyses of dynamic stability of the sumberged structure with damping are conducted. The case structure with damping is more complicated 'than the case without it. According to the principle of perturbation, a new model for dynamic stability calculation in consideration of damping effect is developed. In this paper, the formulas are deduced, the computational program is compiled, the practical examples are analysed, and this problem is solved very satisfactorily. The computational results show that the shape and value of the regions of dynamic instability can be changed significantly by damping. So only by considering damping can the property of dynamic stability of the submerged structure be reflected correctly. 展开更多
关键词 ANALYSIS OF DYNAMIC STABILITY OF SUBMERGED STRUCTURE
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Effects of three-body interaction on dynamic and static structure factors of an optically-trapped Bose gas 认领 引用
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作者 漆伟 梁兆新 张志东 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第9期292-297,共6页
We investigate how three-body interactions affect the elementary excitations and dynamic structure factor of a Bose- Einstein condensate trapped in a one-dimensional optical lattice. To this end, we numerically solve ... We investigate how three-body interactions affect the elementary excitations and dynamic structure factor of a Bose- Einstein condensate trapped in a one-dimensional optical lattice. To this end, we numerically solve the Gross-Pitaevskii equation and then the corresponding Bogoliubov equations. Our results show that three-body interactions can change both the Bogoliubov band structure and the dynamical structure factor dramatically, especially in the case of the two-body interaction being relatively small. Furthermore, when the optical lattice is strong enough, the analytical results, combined with the sum-rule approach, help us to understand that： the effects of three-body interactions on the static structure Ihctor can be significantly amplified by an optical lattice. Our predictions should be observable within the current Bragg spectroscopy experiment. 展开更多
关键词 dynamic structure factor three-body interaction optical lattice
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Dynamic Structure Factor of an Optically Trapped Dipolar Bose–Einstein Condensate 认领 引用
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作者 漆伟 梁兆新 张志东 《Communications in Theoretical Physics》 SCIE CAS CSCD 2014年第2期191-196,共6页
Motivated by the recent experimental achievements in using the Bragg spectroscopy to measure the excitation spectrum of an ultra-cold atomic system with long-range interactions, we investigate the dynamic structure fa... Motivated by the recent experimental achievements in using the Bragg spectroscopy to measure the excitation spectrum of an ultra-cold atomic system with long-range interactions, we investigate the dynamic structure factor of a cigar-shaped dipolar Bose condensate trapped in a one-dimensional optical lattices. Our results show that the Bogoliubov bands of the system, particularly the lowest one, can be significantly influenced when one tunes the dipole orientation. Consequently, the calculated static structure factor of an optically trapped dipolar Bose gas shows marked difference from the non-dipolar one. Moreover, we show that the effects of dipole-dipole interaction on the dynamic structure factor is also strongly affected by the strength of the optical confinement. 展开更多
关键词 Bose-Einstein condensate optical lattice dynamic structure factor
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DYNAMIC RESPONSE OF UNDERGROUND STRUCTURES BY TIME DOMAIN SBEM AND SFEM 认领 引用
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作者 朱建雄 曹志远 李国豪 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1990年第12期1129-1136,共8页
The dynamic interaction problems of three-dimensional lineqr elastic structures with arbitrary shaped section embedded in a homogeneous, isotropic and linear elastic half space under dynamic disturbances are numerical... The dynamic interaction problems of three-dimensional lineqr elastic structures with arbitrary shaped section embedded in a homogeneous, isotropic and linear elastic half space under dynamic disturbances are numerically solved. The numerical method employed is a combination of the time domain semi-analytical boundary element method (SBEM) used for the semi-infinite soil medium and the semi-analytical finite element method (SFEM) used for the three-dimensional structure. The two methods are combined through equilibrium and compatibility conditions at the soil-structure interface. Displacements, velocities, accelerations and interaction forces at the interface between underground structure and soil medium produced by the diffraction of wave by an underground structure for every time step are obtained. In dynamic soil-structure interaction problems, it is advantageous to combine the SBEM and the SFEM in an effort to produce an optimum numerical hybrid scheme which is characterized by the main advantages of the two methods. The effects of the thickness, the ratio of length and diameter of underground structure and the soil medium on dynamic responses are discussed. 展开更多
关键词 dynamic interaction of structure and medium semi-analytical finite element method semi-analytical boundary element method
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Towards dynamic structure of biological complexes at atomic resolution by cryo-EM 认领 引用
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作者 Kai Zhang 《Chinese Physics B》 SCIE EI CAS CSCD 2018年第6期35-46,共12页
Cryo-electron microscopy makes use of transmission electron microscopy to image vitrified biological samples and reconstruct their three-dimensional structures from two-dimensional projections via computational approa... Cryo-electron microscopy makes use of transmission electron microscopy to image vitrified biological samples and reconstruct their three-dimensional structures from two-dimensional projections via computational approaches. After over40 years of development, this technique is now reaching its zenith and reforming the research paradigm of modern structural biology. It has been gradually taking over X-ray crystallography as the mainstream method. In this review, we briefly introduce the history of cryo-EM, recent technical development and its potential power to reveal dynamic structures. The technical barriers and possible approaches to tackle the upcoming challenges are discussed. 展开更多
关键词 cryo-electron microscopy protein complexes three-dimensional reconstruction dynamic structures probabilistic conformational spaces
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Nanograting‑Based Dynamic Structural Colors Using Heterogeneous Materials 认领 引用
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作者 Jingang Wang Haibo Yu +6 位作者 Jianchen Zheng Yuzhao Zhang Hongji Guo Ye Qiu Xiaoduo Wang Yongliang Yang Lianqing Liu 《Nano-Micro Letters》 SCIE EI CAS CSCD 2025年第3期138-151,共14页
Dynamic structuralcolors can change in response todifferent environmental stimuli.This ability remains effectiveeven when the size of the speciesresponsible for the structural coloris reduced to a few micrometers,prov... Dynamic structuralcolors can change in response todifferent environmental stimuli.This ability remains effectiveeven when the size of the speciesresponsible for the structural coloris reduced to a few micrometers,providing a promising sensingmechanism for solving microenvironmentalsensing problems inmicro-robotics and microfluidics.However, the lack of dynamicstructural colors that can encoderapidly, easily integrate, and accuratelyreflect changes in physical quantities hinders their use in microscale sensing applications. Herein, we present a 2.5-dimensionaldynamic structural color based on nanogratings of heterogeneous materials, which were obtained by interweaving a pH-responsive hydrogelwith an IP-L photoresist. Transverse gratings printed with pH-responsive hydrogels elongated the period of longitudinal grating in the swollenstate, resulting in pH-tuned structural colors at a 45° incidence. Moreover, the patterned encoding and array printing of dynamic structuralcolors were achieved using grayscale stripe images to accurately encode the periods and heights of the nanogrid structures. Overall, dynamicstructural color networks exhibit promising potential for applications in information encryption and in situ sensing for microfluidic chips. 展开更多
关键词 Dynamic structural colors Four-dimensional printing pH-responsive Nanogrid Heterogeneous materials
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Smart luminescent nanoclusters with dynamic covalent bond for reversible information encryption 认领 引用
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作者 Bin Bin Chen Ya Ting Gao +4 位作者 Meng Li Liu Da Wei Li Qian Liu Zheng Zhao Ben Zhong Tang 《Smart Molecules》 CSCD 2025年第4期56-63,共8页
Luminescent nanoclusters(NCs)have attracted much attention because of their superior photophysical properties;however,the design of dynamic NCs with reversible structural change is highly challenging.Herein,we synthes... Luminescent nanoclusters(NCs)have attracted much attention because of their superior photophysical properties;however,the design of dynamic NCs with reversible structural change is highly challenging.Herein,we synthesize a kind of dynamic luminescent NCs through Schiff base crosslinking between triethylenetetramine(TETA)and tannic acid at room temperature.The proposed NCs have an excitation-independent blue emission,and the maximum emission is available at about 458 nm with two excitation centers.Furthermore,the crosslinking degree of the NCs can be effectively adjusted by TETA and their formation is a kineticcontrol process.Most importantly,the proposed NCs show a property of pHcontrolled reversible depolymerization and polymerization,accompanied by a cyclic“on-off-on”photoswitching,which is directly attributed to pH-stimulated reversible C=N bond cleavage and re-formation.Because of the reversible structure change properties,the dynamic NCs have been well used in reversible information encryption.This new finding provides not only us with a powerful strategy to study the structure–properties relationship of luminescent NCs but also a design idea for constructing smart optical nanomaterials. 展开更多
关键词 dynamic covalent bond dynamic structural change luminescent nanoclusters reversible information encryption Schiff base crosslinking
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