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A high-strength and high-toughness nacreous structure in a deep-sea Nautilus shell:Critical role of platelet geometry and organic matrix

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Journal of materials Science & Technology 2021年第29期88卷 189-202页

作者： S.m.Liang h.m.ji X.W.Li Department of materials Physics and Chemistry School of Materials Science and EngineeringNortheastern UniversityShenyang110819China State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819China Key Laboratory for Anisotropy and Texture of materials Ministry of EducationNortheastern UniversityShenyang110819China

To explore the differences in mechanical behavior of nacre between shells that live in different water depths,the microstructures,phase composition and related mechanical properties of nacre under indentation,three-point bending and shear tests in deep-sea Nautilus and freshwater Cristaria plicata shells were systematically *** is found that the nacreous structure in Nautilus shell exhibits an outstanding combination of high strength and high toughness compared with that in *** shell,attributing to its larger aspect ratio of platelet and interfacial shear ***,the interfacial resistance is mainly generated from the adhesion of organic matrix and friction caused by nano-asperities on platelet *** to the interfacial resistance model,the stiction force originated from organic matrix adhesion is sensitive to its content,and the friction force produced by nano-asperities presents a positive correlation with their distribution density and ***,the higher content of organic matrix of nacre with denser and larger nano-asperities on platelet surfaces in Nautilus shell contributes to a higher interfacial ***,it is the coupled effects of platelet geometries(*** ratio and nano-asperity)and organic matrix that result in the high-strength and high-toughness nacreous structure in Nautilus shell,which is thus more conductive to inhabit in the deep sea with extremely high *** present research findings are expected to provide beneficial references for the design of strong and tough nacre-inspired materials with appropriate platelet geometry and content of soft phase.

关键词： Deep-sea Nautilus shell Nacre mechanical property Platelet geometry Organic matrix

Integration of melanin-Resveratrol Nanosystem for the Diagnostic-therapeutic of Renal Fibrosis

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Chemical Research in Chinese Universities 2025年第1期41卷 86-94页

作者： LI Tingting jiAmengni ji huifang ZhANG Ruiping The Third hospital of Shanxi medical University Shanxi Bethune HospitalShanxi Academy of Medical SciencesTongji Shanxi HospitalTaiyuan030032P.R.China medicinal Basic Research Innovation Center of Chronic Kidney Disease Ministry of EducationShanxi Medical UniversityTaiyuan030001P.R.China School of Pharmacy Shanxi Medical UniversityTaiyuan030001P.R.China The Radiology Department of Shanxi Provincial People’s hospital Affiliated to Shanxi medical University Taiyuan030012P.R.China

In this work,melanin nanoparticle-resveratrol(mNP-RES)nanosystem was excogitated and constructed for the treatment and imaging of folate-induced renal fibrosis(RF)mice model to fulfill the combination of diagnosis and *** characterization indicated that mNP-RES was a monodisperse spherical framework with a uniform diameter of(18.6±2.7)nm and the drug loading content of RES was 44.8%.The inhibition ratios of reactive oxygen species,such as·Oh,·O_(2)−,ABTS’and DPPh were all greater than 80%.After systemic therapy with mNP-RES,the levels of serum creatinine(SCr)and blood urea nitrogen(BUN)were decreased,and the extent of renal fibrosis was considerably relieved,which was verified by h&E,masson and terminal-deoxynucleoitidyl transferase mediated nick end labeling(TUNEL)*** mNP-RES nanosystem can diagnose and monitor the therapeutic efficacy of RF in real time and noninvasively via photoacoustic/magnetic resonance imaging(PA/mRI)dual-modality imaging,and the mNP-RES diagnostic-therapeutic nanosystem had satisfactory biocompatibility in vivo,which facilitated its future bio-transformation for RF treatment in clinical application.

关键词： melanin Resveratrol Diagnostic-therapeutic nanosystem Dual-modal imaging Renal fibrosis

machine learning based damage state identification:A novel perspective on fragility analysis for nuclear power plants considering structural uncertainties

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Earthquake Engineering and Engineering Vibration 2025年第1期24卷 201-222页

作者： Zheng Zhi Wang Yong Pan Xiaolan ji Duofa College of Civil Engineering Taiyuan University of TechnologyTaiyuan 030024China Key Lab of Structures Dynamic Behavior and Control(harbin Institute of Technology) Ministry of EducationHarbin 150090China Key Lab of Smart Prevention and mitigation of Civil Engineering Disasters of the ministry of Industry and Information Technology Harbin Institute of TechnologyHarbin 150090China

Seismic fragility analysis(SFA)is known as an effective probabilistic-based approach used to evaluate seismic *** are various sources of uncertainties associated with this approach.A nuclear power plant(NPP)system is an extremely important infrastructure and contains many structural uncertainties due to construction issues or structural deterioration during *** of structural uncertainties effects is a costly and time-consuming endeavor.A novel approach to SFA for the NPP considering structural uncertainties based on the damage state is proposed and *** results suggest that considering the structural uncertainties is essential in assessing the fragility of the NPP structure,and the impact of structural uncertainties tends to increase with the state of ***,machine learning(mL)is found to be superior in high-precision damage state identification of the NPP for reducing the time of nonlinear time-history analysis(NLThA)and could be applied in the damage state-based ***,the impact of various sources of uncertainties is investigated through sensitivity *** Sobol and Shapley additive explanations(ShAP)method can be complementary to each other and able to solve the problem of quantifying seismic and structural uncertainties simultaneously and the interaction effect of each parameter.

关键词： seismic fragility analysis damage state structural uncertainties machine learning sensitivity analysis

Distributed optimal consensus control for multiagent systems based on event-triggered and prioritized experience replay strategies

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Science China(Information Sciences) 2025年第1期68卷 306-321页

作者： Cuijuan ZhANG Lianghao ji Shasha YANG Xing GUO huaqing LI Chongqing Key Laboratory of Image Cognition Chongqing University of Posts and Telecommunications Key Laboratory of Intelligent Perception and Computing of Anhui Province Anqing Normal University College of Electronic and Information Engineering Southwest University

This study uses event-triggered(ET) and reinforcement learning methods to investigate the optimal consensus control problem for cooperative-competitive multiagent systems. It proposes a novel distributed ET control strategy, which relies on a prioritized experience replay(PER) policy. This strategy not only conserves communication resources but also ensures acceptable system performance. To implement the proposed method, actor-critic(AC) dual-structured neural networks(NNs) are used to approximate the value function and control policy. In the AC NNs, the weight estimates for the NNs are updated at the moment of event triggering, resulting in a nonperiodic weight adjustment pattern. This approach decreases the computational cost in comparison with the traditional ET mechanism. The PER-based ET mechanism makes full use of valid historical data and effectively establishes a balance between system performance and communication resource ***, it does not require the following two conditions in most existing studies:(1) requirement of the system dynamics model to be known, and(2) persistent excitation. In addition, Zeno behavior is excluded from this study. Finally, a simulation is conducted to confirm the validity of the suggested approach.

关键词： multiagent systems event-triggered mechanism prioritized experience replay dual-structured neural networks optimal consensus control

mossbauer,optical and structural properties of Fe^(3+) ion in borate glass

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Journal of Rare Earths 2025年第1期43卷 162-170,I0006页

作者： Essam A.Elkelany hesham Y.Amin A.Samir m.m.EL-hady h.h.El-Bahnasawy moukhtar A.hassan Basic Science Department Faculty of EngineeringSinai UniversityAl-Arish45511Egypt School of Information and Electrical Engineering Hangzhou City UniversityHangzhou30015China State Key Laboratory of modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou310027China Basic Science Department Faculty of Engineering at ShoubraBenha University11629Egypt Physics Department Faculty of ScienceAl-Azhar University11884CairoEgypt

Lanthanum-bearing iron lithium borate glass is a quaternary system for oxide glasses and was prepared via the melt-quenching *** present article correlates the structure,optical,ligand field and m?ssbauer data on iron lithium borate glass co ntaining La^(3+).The density was measured,while the molar volume was *** physical parameters are *** increasing the La_(2)O_(3) content within the glass network,infrared spectra analysis reveals structural modifications such as the increase in BO_(4) units and the decline in both BO_(3) units and NBO bonds ***,optical absorption spectra were *** absorption spectra disclose a plethora of electronic transitions that are related to Fe^(3+)in tetrahedral and octahedral sites,however,Fe^(2+)phase is not observed in optical spectra,but it has a clear signature in m?ssbauer ***,the glass absorption edges undergo a clear blue shift,reflecting an increased band gap energy(1.96-2.28 eV).The decline in NBO bonds justifies this ***,the values of crystal field splitting are increased,while the values of Racah parameters are *** trend is justified by the decline in NBO bonds and increases electron localization around Fe cations.m?ssbauer spectra confirm the existence of Fe^(3+)in tetrahedral and octahedral sites,while Fe^(2+)exists in only a tetrahedral *** increasing La_(2)O_(3) content,the isomer shift of Fe^(3+)in tetrahedral sites changes to be 0.312-0.329 mm/s,while the isomer shift of octahedral Fe^(3+)is 0.424-0.456 mm/*** findings coincide with optical *** the isomer shift of tetrahedral Fe^(2+)is 0.902-0.911 mm/*** results of structural,optical and ligand field associated with m?ssbauer spectra open more vistas toward the utility of these samples in the optics realm.

关键词： Fe3+ions Rare-earth oxide mossbauer spectra Ligand field parameters Optical properties

mercury contents and potential exposure risk of rice-containing food products

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Journal of Environmental Sciences 2025年第2期148卷 683-690页

作者： Xin Wang Yingjun Wang Yaqi Zhang Ziyan Liu Xiaomeng ji Yong Cai Shandong Key Laboratory of Environmental Processes and health School of Environmental Science and EngineeringShandong UniversityQingdao 266237China Department of Chemistry&Biochemistry Florida International UniversityMiamiFL 33199USA

mercury(hg),especially methylmercury(mehg),accumulation in rice grain due to rice paddy possessing conditions conducive to hg methylation has led to human hg exposure through consumption of rice-based daily *** addition to being a food staple,rice is widely used as a raw material to produce a vast variety of processed food *** is known about hg levels in snacking rice-food products and potential hg exposure from consumption of them,besides previous studies on infant rice *** to provide complementary information for a more complete assessment on hg exposure risk originated from hgcontaining rice,this study determined total hg(Thg)and mehg levels in 195 rice-containing and rice-free processed food products covering all major types of snack foods marketed in China and the estimated daily intake(EDI)of dietary hg from the consumption of these *** results clearly showed Thg and mehg contents in rice-containing foods were significantly higher than rice-free products,suggesting the transfer of hg and mehg from the rice to the end products,even after manufacturing ***,significant positive correlations were observed between Thg,mehg,or mehg/Thg ratio and rice content for samples containing multiple grains as ingredients,further indicating the deciding role of rice for hg levels in the end food *** the EDI of Thg and mehg via ricebased food products were relatively low compared to the reference dose,it should be considered these snacking food products would contribute additive hg intake outside of the daily regular meals.

关键词： mercury methylmercury Processed food products Rice Dietary exposure

Response properties of geometries of coal penetrating fracture on seepage behavior

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International Journal of mining Science and Technology 2025年第2期35卷 191-211页

作者： han, Penghua Wang, Kai Pang, jiewen ji, Xiaofeng Zhang, Cun College of Engineering for Safety and Emergency management Taiyuan University of Science and Technology Taiyuan030024 China School of Energy and mining Engineering China University of Mining and Technology - Beijing Beijing100083 China Engineering Research Center of Green and Intelligent mining for Thick Coal Seam Ministry of Education China University of Mining and Technology-Beijing Beijing100083 China

The fracture surfaces of coal-rock masses formed under mining-induced stress generally exhibit complex geometries, and the fracture geometry is one of the primary factors affecting the seepage characteristics of coal-rock penetrating fracture. This paper investigates the seepage characteristics of 5 groups of coal penetrating fracture (CPF) with different joint roughness coefficients (JRCs). Based on 3D morphology scanner tests and hydraulic coupling tests, a characterization method of effective geometric parameters in fracture surfaces under various confining pressures was improved, and a relationship between effective geometric parameters and the confining pressure is established. The results indicate that the nonlinear flow behavior in a CPF primarily includes three types: non-Newtonian fluid seepage under high confining pressure and low JRC, non-Darcy seepage under low confining pressure and high JRC, and the whole process of seepage characteristics between these two conditions. Among them, non-Newtonian fluid seepage is caused by significant fracture expansion, while non-Darcy seepage can be attributed to turbulence effects. During the seepage process, the geometric parameters with different JRC fracture samples all exhibit exponential changes with the increase of confining pressure. In addition, under high confining pressure, the effective contact ratio, effective fracture aperture, and void deviation ratio with high JRC fracture samples under high confining pressure increase by 93.5%, 67.4%, and 24.9%, respectively, compared with those of low JRC fracture samples. According to the variation of geometric parameters in a CPF with external stress, a seepage model considering geometric parameters in a CPF is proposed. By introducing the root mean square error (RmSE) and coefficient of determination (R2) to evaluate the error and goodness of fit between model curves and experimental data, it is found that the theoretical curves of model in this paper have the best

关键词： Non Newtonian flow

The advanced development of innovative photocatalytic coupling strategies for hydrogen production

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Chinese Chemical Letters 2025年第1期36卷 80-91页

作者： Yuehai Zhi Chen Gu huachao ji Kang Chen Wenqi Gao jianmei Chen Dafeng Yan College of Electronic and Optical Engineering&College of Flexible Electronics(Future Technology) Nanjing 210023China hubei Key Laboratory for Precision Synthesis of Small molecule Pharmaceuticals&ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional molecules&College of Chemistry and Chemical Engineering Hubei UniversityWuhan 430062China

Photocatalytic technology harnesses solar energy to facilitate chemical transformations,presenting significant potential in energy generation and environmental ***,the conventional O_(2)evolution process is hindered by high reaction barriers and inefficiencies,which limit its widespread ***,exploring novel photocatalytic coupling strategies to replace water oxidation has become a key route to enhance the efficiency of h_(2)*** this review,organic pollutants removal and the valorization of organics as substitutes for water oxidation coupling strategies for photocatalytic h_(2)production are comprehensively *** strategies not only circumvent the high reaction barriers associated with O_(2)evolution to enhance the h_(2)production but also aid in the removing of organic pollutants or synthesis of value-added *** also present future research directions and underscore the significance of advanced catalyst design,in-depth analysis of reaction mechanisms,and systematic optimization strategies in realizing an efficient and sustainable photocatalytic *** guidance is anticipated to provide theoretical and practical new insights for the future development of photocatalytic coupling reactions,fostering further explorations in the realm of renewable energy and environmental governance.

关键词： Photocatalysis Pollutants removal Valorization of organics Catalyst design

Interfacial electron rearrangement of 3D Fe_(3)O_(4)/h-YFeO_(3)composites for efficient electromagnetic wave absorption

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International Journal of minerals,metallurgy and materials 2025年第3期32卷 609-618页

作者： Yi Sui Yingde Zhang Guang Liu Lei ji Junyu Yue Chen Wu mi Yan School of materials Science and Engineering Zhejiang UniversityHangzhou 310027China State Key Laboratory of Baiyunobo Rare Earth Resource Researches and Comprehensive Utilization Baotou Research Institute of Rare EarthsBaotou 014030China Key Laboratory of Rare Earths Chinese Academy of SciencesGanzhou 341119China Shanxi-Zheda Institute of Advanced materials and Chemical Engineering Taiyuan 030032China

Interface modulation is an important pathway for highly efficient electromagnetic wave ***,tailored interfaces between Fe_(3)O_(4)particles and the hexagonal-YFeO_(3)(h-YFeO_(3))framework were constructed via facile *** resulting interfa-cial electron rearrangement at the heterojunction led to enhanced dielectric and magnetic loss *** results and density function theory(DFT)simulations demonstrate a transition in electrical properties from a half-metallic monophase to metallic Fe_(3)O_(4)/h-YFeO_(3)composites,emphasizing the advantages of the formed *** transformation of electron behavior is also accompan-ied by a redistribution of electrons at the Fe_(3)O_(4)/h-YFeO_(3)heterojunction,leading to the accumulation of localized electrons around the Y-O-Fe band bridge,consequently enhancing the polarization.A minimum reflection loss of-34.0 dB can be achieved at 12.0 Ghz and 2.0 mm thickness with an effective bandwidth of 3.3 Ghz due to the abundant interfaces,enhanced polarization,and rational ***,the synergistic effects endow the Fe_(3)O_(4)/h-YFeO_(3)composites with high performance and tunable functional properties for efficient electromagnetic absorption.

关键词： self-assembling heterojunction electron rearrangement interface modulation electromagnetic wave absorption