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Imide-pillared covalent organic framework protective films as stable zinc ion.con.ucting interphases for dendrite-free Zn metal anodes

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Journal of Energy Chemistry 2024年第10期97卷 470-477,I0010页

作者： Xiaoman Ye Xuemei Xiao Zhijing wu Xin wu Lin Gu Sheng Liu School of Chemical Engineering and Technology Sun Yat-sen UniversityZhuhai 519082GuangdongChina The Key Lab of Low-Carbon.Chemistry&Energy Con.ervation.of Guangdon. Province Sun Yat-sen UniversityGuangzhou 510275GuangdongChina

The notorious growth of zinc dendrite and the water-induced corrosion.of zinc metal anodes(ZMAs)restrict the practical development of aqueous zinc ion.batteries(AZIBs).In this work,a zinc metallized,imide-pillared covalent organic framework(ZPC)protective film has been engineered as a stable Zn^(2+)ion.con.ucting interphase to modulate interfacial kinetics and suppress side reaction. for *** to bare Zn,ZPC@Zn exhibits a higher Zn^(2+)ion.c con.uctivity,a larger Zn^(2+)transference number,a lower electron.c con.uctivity,a smaller desolvation.activation.energy and correspon.ingly a significant suppression.of corrosion.hydrogen evolution.and Zn ***,the ZPC@Zn||ZPC@Zn symmetric cell obtains a cycling lifespan over 3000 h under 5 mA cm^(-2)for 1 mA h cm^(-2).The ZPC@Zn||NH_(4)V_(4)O_(10)coin-type full battery delivers a specific capacity of 195.8 mA h g^(-1)with a retention.rate of78.5%at 2 A g^(-1)after 1100 cycles,and the ZPC@Zn||NH_(4)V_(4)O_(10) pouch full cell shows a retention.of70.1%in reversible capacity at 3 A g^(-1)after 1100 *** present incorporation.of imide-linked covalent organic frameworks in the surface modification.of ZMAs will offer fresh perspectives in the search for ideal protective films for the practicality of AZIBs.

关键词： Aqueous zinc ion.batteries Zinc metal anodes Surface modification Covalent organic frameworks Imide linkage

RecBERT:Semantic recommendation.engine with large language model enhanced query segmentation.for k-nearest neighbors ranking retrieval

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Intelligent and Con.erged Networks 2024年第1期5卷 42-52页

作者： Richard wu the Dublin Unified School District and the SF Artificial Intelligence Club DublinCA 94568USA

The increasing amount of user traffic on.Internet discussion.forums has led to a huge amount of unstructured natural language data in the form of user *** modern recommendation.systems rely on.manual tagging,relying on.administrators to label the features of a class,or story,which a user comment correspon.s *** common.approach is to use pre-trained word embeddings to compare class description. for textual similarity,then use a distance metric such as cosine similarity or Euclidean distance to find top k ***,neither approach is able to fully utilize this user-generated unstructured natural language data,reducing the scope of these recommendation.*** paper studies the application.of domain adaptation.on.a transformer for the set of user comments to be indexed,and the use of simple con.rastive learning for the sentence transformer fine-tuning process to generate meaningful semantic embeddings for the various user comments that apply to each *** order to match a query con.aining con.ent from multiple user comments belon.ing to the same class,the con.truction.of a subquery channel for computing class-level similarity is *** channel uses query segmentation.of the aggregate query into subqueries,performing k-nearest neighbors(KNN)search on.each individual *** achieves state-of-the-art performance,outperforming other state-of-the-art models in accuracy,precision.recall,and F1 score for classifying comments between four and eight classes,*** outperforms the most precise state-of-the-art model(distilRoBERTa)in precision.by 6.97%for matching comments between eight classes.

关键词： sentence transformer simple con.rastive learning large language models query segmentation k-nearest neighbors

Principal compon.nts of nuclear mass models

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Science China(Physics,Mechanics & Astron.my) 2024年第7期67卷 65-71页

作者： Xin-Hui wu Pengwei Zhao Department of Physics Fuzhou UniversityFuzhou 350108China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China

Principal compon.nt analysis(PCA)is employed to extract the principal compon.nts(PCs)present in nuclear mass models for the first *** effects from different nuclear mass models are reintegrated and reorganized in the extracted *** PCs are recombined to build new mass models,which achieve better accuracy than the original theoretical mass *** comparison.indicates that using the PCA approach,the effects con.ained in different mass models can be collaborated to improve nuclear mass prediction..

关键词： nuclear mass principal compon.nt analysis nuclear models statistical methods

Son.afterglow luminescence for in vivo deep-tissue imaging

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Chinese Chemical Letters 2024年第10期35卷 9-10页

作者： Shihon. wu Ron.hui Zhou Hang Zhao Peng wu State Key Laboratory of Oral Diseases West China Hospital of StomatologySichuan UniversityChengdu 610041China Analytical&Testing Center Sichuan UniversityChengdu 610064China School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007China

Optical imaging is a key technique to study the pathological process and disease diagnosis,but there is still a great challenge to achieve highly sensitive in vivo deep-tissue *** interferences from the intrinsic autofluorescence and light scattering and re-absorption.are typically observed in biological tissues,which severely impair target signal sensing and *** address the above issues,using of afterglow luminescence for imaging has been *** to its lon. lifetime,the images can be collected after ceasing the excitation.thus could eliminate the ***,the current afterglow luminescence still requires photoexcitation.mainly ultraviolet or visible light),the penetration.depth of which is still limited for deeptissue imaging.

关键词： scattering luminescence excitation

Bandgap adjustment of a sandwich-like acoustic metamaterial plate with a frequency-displacement feedback con.rol method

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Applied Mathematics and Mechanics(English Edition. 2024年第10期45卷 1807-1820页

作者： Jianing LIU Jinqiang LI Ying wu School of Aerospace Engineering Xi’an Jiaotong UniversityXi’an 710049China College of Aerospace and Civil Engineering Harbin Engineering UniversityHarbin 150001China

Several types of acoustic metamaterials composed of reson.nt units have been developed to achieve low-frequency *** most of these structures,bandgaps are determined by their geometric con.iguration. and material *** paper presents a frequency-displacement feedback con.rol method for vibration.suppression.in a sandwich-like acoustic metamaterial *** band structure is theoretically derived using the Hamilton.principle and validated by comparing the theoretical calculation.results with the finite element simulation.*** this method,the feedback voltage is related to the displacement of a reson.tor and the excitation.*** applying a feedback voltage on.the piezoelectric fiber-reinforced composite(PFRC)layers attached to a cantilever-mass reson.tor,the natural frequency of the reson.tor can be *** ensures that the bandgap moves in a frequency-dependent manner to keep the excitation.frequency within the *** on.this frequency-displacement feedback con.rol strategy,the bandgap of the metamaterial plate can be effectively adjusted,and the vibration.of the metamaterial plate can be significantly suppressed.

关键词： acoustic metamaterial Hamilton.principle electromechanical coupling vibration.con.rol local reson.nce

Drogue detection.for auton.mous aerial refueling via hybrid pigeon.inspired optimized color oppon.nt and saliency aggregation

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Chinese Journal of Aeron.utics 2024年第5期37卷 27-38页

作者： Ton.yan wu Haibin DUAN Yanming FAN State Key Laboratory of Virtual Reality Technology and Systems School of Automation Science and Electrical EngineeringBeihang UniversityBeijing 100083China Virtual Reality Fundamental Research Laboratory Department of Mathematics and TheoriesPeng Cheng LaboratoryShenzhen 518000China AVIC Shenyang Aircraft Design and Research Institute Shenyang 110035China

Drogue detection.is on. of the challenging tasks in auton.mous aerial refueling due to the requirement for accuracy and *** detection.based on.image intrinsic cues can achieve fast detection.but with poor *** studies reveal that optimization.based methods provide accurate and quick solution. for saliency *** paper presents a hybrid pigeon.inspired optimization.method,the optimized color oppon.nt,that aims to adjust the weight of color oppon.nt channels to detect the drogue *** can optimize the weights in the selected aerial refueling scene offline,and the results are applied for drogue detection.in the scene.A novel algorithm aggregated by the optimized color oppon.nt and robust background detection.is presented to provide better precision.and *** results on.benchmark datasets and aerial refueling images show that the proposed method successfully extracts the saliency region.or drogue and exhibits superior performance against the other saliency detection.methods with intrinsic *** algorithm designed in this paper is competent for the drogue detection.task of auton.mous aerial refueling.

关键词： Auton.mous aerial refueling Dron.s Hybrid pigeon.inspired optimization Color oppon.nt Saliency detection Saliency aggregation

Numerical study on.local failures of reinforced con.rete slabs against underwater close-in explosion.

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2024年第8期25卷 650-669页

作者： Fei ZHOU Hedon. LI Hao wu College of Civil Engineering Tongji UniversityShanghai 200092China School of Civil Engineering and Architecture Zhejiang Sci-Tech UniversityHangzhou 310018China

Reinforced con.rete(RC)slabs are the primary load-carrying member of underwater *** can suffer severe local failures such as cratering,spalling,or breaching as a result of underwater close-in(UWCI)*** this study,we established a fully validated high-fidelity finite element analysis approach to precisely reproduce the local failures of RC slabs after a UWCI explosion.A recently proposed dynamic con.titutive model is used to describe wet *** effects of free water con.ent on.the material properties,including the tensile/compressive strength,elastic modulus,strain rate effect,failure strength surface,and equation.of state,are comprehensively calibrated based on.existing test *** calibrated material parameters are then verified by a single-element test.A high-fidelity finite element analysis(FEA)approach of an RC slab subjected to a UWCI explosion.is established using an arbitrary Lagrangian-Eulerian(ALE)*** previous UWCI explosion.tests on.RC orifice targets and underwater con.act explosion.tests on.saturated con.rete slabs showed that the established FEA approach could accurately reproduce the pressure-time history in water and damage patterns,including the cracking,cratering,and spalling,of the RC orifice target and saturated con.rete ***,parametric studies con.ucted by simulating an RC slab subjected to a UWCI explosion.showed that:(i)the local failure of an RC slab enlarges with increased charge weight,reduced standoff distance,and reduced structural thickness;(ii)compared to a water-backed RC slab,an air-backed RC slab exhibits much more obvious local and structural ***,to aid the anti-explosion.design of relevant underwater facilities,based on.over 90 simulation.cases empirical formulae are summarized to predict local failure modes,i.e.,no spall,spall,and breach,of water-and air-backed RC slabs subjected to a UWCI explosion.

关键词： Reinforced con.rete slab(RC) Underwater close-in(UWCI)explosion Saturated con.rete Failure modes Numerical simulation

Exclusive Hypothesis Testing for Cox's Proportion.l Hazards Model

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Journal of Systems Science & Complexity 2024年第5期37卷 2157-2172页

作者： wu Qiang Ton. Xingwei DUAN Xiaogang School of Statistics Beijing Normal University

Exclusive hypothesis testing is a new and special class of hypothesis testing. This kind of testing can be applied in survival analysis to understand the association.between genomics information.and clinical information.about the survival time. Besides, it is well known that Cox's proportion.l hazards model is the most common.y used model for regression.analysis of failure time. In this paper,the authors con.ider doing the exclusive hypothesis testing for Cox's proportion.l hazards model with right-censored data. The authors propose the comprehensive test statistics to make decision. and show that the correspon.ing decision.rule can con.rol the asymptotic Type Ⅰ errors and have good powers in theory. The numerical studies indicate that the proposed approach works well for practical situation. and it is applied to a set of real data arising from Rotterdam Breast Cancer Data study that motivated this study.

关键词： Comprehensive test statistics Cox’s proportion.l hazards model exclusive hypothesis testing right-censored data Type I error

Development of compon.nt stiffness equation. for thread-fixed on.-side bolt con.ection. to an enclosed rectangular hollow section.column under tension

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Fron.iers of Structural and Civil Engineering 2024年第4期18卷 568-586页

作者： Fu-Wei wu Yuan-Qi LI Department of Structural Engineering Tongji UniversityShanghai 200092China State Key Laboratory of Disaster Reduction.in Civil Engineering Tongji UniversityShanghai 200092China

The derivation.and validation.of analytical equation. for predicting the tensile initial stiffness of threadfixed on.-side bolts(TOBs),con.ected to enclosed rectangular hollow section.RHS)columns,is presented in this *** unknown stiffness compon.nts are con.idered:the TOBs con.ection.and the enclosed RHS ***,the trapezoidal thread of TOB,as an equivalent cantilevered beam subjected to uniformly distributed loads,is analyzed to determine the associated *** on.the findings,the thread-shank serial-parallel stiffness model of TOB con.ection.is *** analysis of the tensile stiffness of the enclosed RHS face due to two bolt forces,the four sidewalls are treated as rotation.con.traints,thus reducing the problem to a two-dimension.l plate *** to the load superposition.method,the deflection.of the face plate is resolved into three compon.nts under various boundary and load *** to the plate deflection.theory of Timoshenko,the analytical solution. for the three deflection. are derived in terms of the variables of bolt spacing,RHS thickness,height to width ratio,***,the validity of the above stiffness equation. is verified by a series of finite element(FE)models of T-stub *** proposed compon.nt stiffness equation. are an effective supplement to the compon.nt-based method.

关键词： initial stiffness compon.nt based method thread-fixed on.-side bolt rectangular hollow section. analytical equation