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Hidden Properties of Mathematical Physics Equations. Double Solutions. The Realization of Integrable Structures. Emergence of Physical Structures and Observable Formations 认领 引用
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作者 L. I. Petrova 《Journal of Applied Mathematics and Physics》 2020年第7期1255-1262,共8页
With the help of skew-symmetric differential forms the hidden properties of the mathematical physics equations are revealed. It is shown that the equations of mathematical physics can describe the emergence of various... With the help of skew-symmetric differential forms the hidden properties of the mathematical physics equations are revealed. It is shown that the equations of mathematical physics can describe the emergence of various structures and formations such as waves, vortices, turbulent pulsations and others. Such properties of the mathematical physics equations, which are hidden (they appear only in the process of solving these equations), depend on the consistency of derivatives in partial differential equations and on the consistency of equations, if the equations of mathematical physics are a set of equations. This is due to the integrability of mathematical physics equations. It is shown that the equations of mathematical physics can have double solutions, namely, the solutions on the original coordinate space and the solutions on integrable structures that are realized discretely (due to any degrees of freedom). The transition from the solutions of the first type to one of the second type describes discrete transitions and the processes of origin of various structures and observable formations. Only mathematical physics equations, on what no additional conditions such as the integrability conditions are imposed, can possess such properties. The results of the present paper were obtained with the help of skew-symmetric differential forms. 展开更多
关键词 Integrability of Mathematical Physics Equations Double Solutions Integrable Structures Discrete Transitions Skew-Symmetric Differential Forms
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Probability of detection and anomaly distribution modeling for surface defects in tenon-groove structures of aeroengine disks 认领 引用 被引量：1
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作者 Hongzhuo LIU Disi YANG +3 位作者 Han YAN Zixu GUO Dawei HUANG Xiaojun YAN 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2025年第10期363-383,共21页
To ensure the structural integrity of life-limiting component of aeroengines,Probabilistic Damage Tolerance(PDT)assessment is applied to evaluate the failure risk as required by airworthiness regulations and military ... To ensure the structural integrity of life-limiting component of aeroengines,Probabilistic Damage Tolerance(PDT)assessment is applied to evaluate the failure risk as required by airworthiness regulations and military standards.The PDT method holds the view that there exist defects such as machining scratches and service cracks in the tenon-groove structures of aeroengine disks.However,it is challenging to conduct PDT assessment due to the scarcity of effective Probability of Detection(POD)model and anomaly distribution model.Through a series of Nondestructive Testing(NDT)experiments,the POD model of real cracks in tenon-groove structures is constructed for the first time by employing the Transfer Function Method(TFM).A novel anomaly distribution model is derived through the utilization of the POD model,instead of using the infeasible field data accumulation method.Subsequently,a framework for calculating the Probability of Failure(POF)of the tenon-groove structures is established,and the aforementioned two models exert a significant influence on the results of POF. 展开更多
关键词 Aeroengine disks Anomaly distribution Probabilistic damage tolerance Probability of detection(POD) Structural integrity Tenon-groove structures Transfer functions
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Effects of Gd on Microstructure and Mechanical Properties of Duplex Stainless Steels for Neutron Absorbing 认领 引用
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作者 Jia Dongxiao Zhao Pengfei +3 位作者 Liang Tian Hou Kunlei Jiang Yuefeng Ma Yingche 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2026年第7期1632-1640,共9页
The effects of different Gd contents on microstructure and mechanical properties of 00Cr23Ni8Mo1.4Mn1.4Si0.5alloy were researched.Results indicate that element Gd exists mainly in three forms in the alloy:Gd2O3,... The effects of different Gd contents on microstructure and mechanical properties of 00Cr23Ni8Mo1.4Mn1.4Si0.5alloy were researched.Results indicate that element Gd exists mainly in three forms in the alloy:Gd2O3,M12Gd,and M3Gd phases(M=Fe,Cr,Ni).With the increase in Gd content,the contents of Gd-containing precipitate and ferrite phase are increased,whereas the austenite phase content is decreased.The Gd oxide and precipitation of two Gd-containing phases are the main causes of cracking in the alloy during the hot deformation process.The partially aggregated Gd oxide particles and the difficult-to-deform Gd-containing precipitates on the grain boundary jointly decrease the hot ductility of the alloy.With the increase in amount of Gd addition,the tensile strength and section shrinkage ratio of the alloy are decreased.Furthermore,M3Gd is harder and more brittle,compared with M12Gd,resulting in a more detrimental impact on the mechanical properties of alloy. 展开更多
关键词 integration of structure and function Gd duplex stainless steel neutron absorbing material mechanical properties
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Self‑Sensing NiFe@N‑doped Carbon Aerogel:Integrating Excellent Radar Stealth,Inherent Structural Health Monitoring,Thermal Management,and Flame Retardancy 认领 引用
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作者 Xiaosen Du Jianhua Zhou +4 位作者 Jiarui Yu Xiaoyan Nie Mingyu Luo Xingyuan He Anguo Xiao 《Nano-Micro Letters》 SCIE EI CAS CSCD 2026年第8期621-640,共20页
Biomass carbon-based aerogels derived from collagen protofibrils are gaining considerable attention in electromagnetic protection.However,achieving a well-designed microstructure,optimized magnetic and dielectric loss... Biomass carbon-based aerogels derived from collagen protofibrils are gaining considerable attention in electromagnetic protection.However,achieving a well-designed microstructure,optimized magnetic and dielectric loss components,and integrated multifunctionality within a single material system remains a significant challenge.Herein,a three-dimensional(3D)hierarchically biomimetic honeycomb-like porous magnetic NiFe@N-doped carbon aerogel(NFNCA)is obtained via a simple strategy involving in situ growth,freeze-drying,and pyrolysis carbonization.Driven by the synergy of a 3D conductive networking structure,magnetic and dielectric multi-components,numerous heterogeneous interfaces,and diverse loss pathways,the optimized NFNCA exhibits exceptional electromagnetic wave attenuation capability,evidenced by a minimum reflection loss(RL)of−53.49 dB at 1.93 mm and an effective absorption bandwidth of 6.24 GHz(11.76-18.00 GHz).Furthermore,the exceptional radar stealth,infrared thermal stealth,thermal management,and flame retardancy characteristics of NFNCA render it a promising candidate for multiple applications in demanding environments.Interestingly,the 3D cross-linked conductive network of NFNCA can serve as strain sensors to detect changes in the internal structure of carbon aerogels.Hence,this work provides a feasible design strategy for developing lightweight,highefficiency,and multifunctional biomass-based carbon aerogel electromagnetic wave absorbing materials for various application scenarios. 展开更多
关键词 Biomass-based carbon aerogel Microwave attenuation Simulation Structural integrity monitoring Multifunction
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Drosophila view on glia in peripheral sensory neuropathy 认领 引用
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作者 Steffen Kautzmann Christian Klämbt 《Neural Regeneration Research》 SCIE CAS CSCD 2026年第6期2353-2354,共2页
Peripheral sensory neurons perceive external signals and convey signals to the central nervous system(CNS).Information transmission occurs via often extremely long axons and timely reactions of the animal require a fa... Peripheral sensory neurons perceive external signals and convey signals to the central nervous system(CNS).Information transmission occurs via often extremely long axons and timely reactions of the animal require a fast conductance velocity.This not only depends on axonal diameter and insulation by glial processes,but it requires the structural integrity of the axon. 展开更多
关键词 peripheral sensory neurons central nervous system cns information Drosophila peripheral sensory neuropathy glial processesbut conductance velocitythis structural integrity glia
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ACTIVE VIBRATION CONTROL AND SUPPRESSION FOR INTEGRATED STRUCTURES 认领 引用 被引量：1
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作者 王忠东 陈塑寰 杨晓东 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 1999年第2期171-178,共8页
The finite element dynamic model for integrated structures containing distributed piezoelectric sensors and actuators ( S/As ) is formulated with a new piezoelectric plate bending element in this paper. The problem of... The finite element dynamic model for integrated structures containing distributed piezoelectric sensors and actuators ( S/As ) is formulated with a new piezoelectric plate bending element in this paper. The problem of active vibration control and suppression of integrated structures is investigated under constant gain negative velocity feedback control law. A general method for active vibration control and suppression of integrated structures is presented. Finally, numerical example is given to illustrate the validity of the method proposed in this paper. 展开更多
关键词 integrated structures piezoelectric sensors and actuators active vibration control and suppression
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Spontaneous Emergence of Physical Structures and Observable Formations: Fluctuations, Waves, Turbulent Pulsations and So on 认领 引用 被引量：1
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作者 L. I. Petrova 《Journal of Applied Mathematics and Physics》 2016年第5期863-870,共8页
As it is known, the closed inexact exterior form and associated closed dual form make up a differential-geometrical structure. Such a differential-geometrical structure describes a physical structure, namely, a pseudo... As it is known, the closed inexact exterior form and associated closed dual form make up a differential-geometrical structure. Such a differential-geometrical structure describes a physical structure, namely, a pseudostructure on which conservation laws are fulfilled (A closed dual form describes a pseudostructure. And a closed exterior form, as it is known, describes a conservative quantity, since the differential of closed form is equal to zero). It has been shown that closed inexact exterior forms, which describe physical structures, are obtained from the equations of mathematical physics. This process proceeds spontaneously under realization of any degrees of freedom of the material medium described. Such a process describes an emergence of physical structures and this is accompanied by an appearance of observed formations such as fluctuations, waves, turbulent pulsations and so on. 展开更多
关键词 Skew-Symmetric Form Nonidentical Relation Degenerate Transformation the Transition from the Nonintegrable Manifolds to the Integrable Structures
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Biomimetic 3D printing of composite structures with decreased cracking 认领 引用 被引量：2
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作者 Fan Du Kai Li +7 位作者 Mingzhen Li Junyang Fang Long Sun Chao Wang Yexin Wang Maiqi Liu Jinbang Li Xiaoying Wang 《Nanotechnology and Precision Engineering》 EI CAS CSCD 2024年第3期24-34,共11页
The development of tissue engineering and regeneration research has created new platforms for bone transplantation.However,the preparation of scaffolds with good fiber integrity is challenging,because scaffolds prepar... The development of tissue engineering and regeneration research has created new platforms for bone transplantation.However,the preparation of scaffolds with good fiber integrity is challenging,because scaffolds prepared by traditional printing methods are prone to fiber cracking during solvent evaporation.Human skin has an excellent natural heat-management system,which helps to maintain a constant body temperature through perspiration or blood-vessel constriction.In this work,an electrohydrodynamic-jet 3D-printing method inspired by the thermal-management system of skin was developed.In this system,the evaporation of solvent in the printed fibers can be adjusted using the temperature-change rate of the substrate to prepare 3D structures with good structural integrity.To investigate the solvent evaporation and the interlayer bonding of the fibers,finite-element analysis simulations of a three-layer microscale structure were carried out.The results show that the solvent-evaporation path is from bottom to top,and the strain in the printed structure becomes smaller with a smaller temperaturechange rate.Experimental results verified the accuracy of these simulation results,and a variety of complex 3D structures with high aspect ratios were printed.Microscale cracks were reduced to the nanoscale by adjusting the temperature-change rate from 2.5 to 0.5℃s-1.Optimized process parameters were selected to prepare a tissue engineering scaffold with high integrity.It was confirmed that this printed scaffold had good biocompatibility and could be used for bone-tissue regeneration.This simple and flexible 3D-printing method can also help with the preparation of a wide range of micro-and nanostructured sensors and actuators. 展开更多
关键词 3D printing Electrohydrodynamic jet Biomimetic Structural integrity Composite scaffold
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Discrete Quantum Transitions, Duality: Emergence of Physical Structures and Occurrence of Observed Formations (Hidden Properties of Mathematical Physics Equations) 认领 引用
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作者 Ludmila Petrova 《Journal of Applied Mathematics and Physics》 2020年第9期1911-1929,共19页
With the help of skew-symmetric differential forms, the hidden properties of the mathematical physics equations that describe discrete quantum transitions and emergence the physical structures are investigated. It is ... With the help of skew-symmetric differential forms, the hidden properties of the mathematical physics equations that describe discrete quantum transitions and emergence the physical structures are investigated. It is shown that the mathematical physics equations possess a unique property. They can describe discrete quantum transitions, emergence of physical structures and occurrence observed formations. However, such a property possesses only equations on which no additional conditions, namely, the conditions of integrability, are imposed. The intergrability conditions are realized from the equations themselves. Just under realization of integrability conditions double solutions to the mathematical physics equations, which describe discrete transitions and so on, are obtained. The peculiarity consists in the fact that the integrability conditions do not directly follow from the mathematical physics equations;they are realized under the description of evolutionary process. The hidden properties of differential equations were discovered when studying the integrability of differential equations of mathematical physics that depends on the consistence between the derivatives in differential equations along different directions and on the consistence of equations in the set of equations. The results of this work were obtained with the help of skew-symmetric differential forms that possess a nontraditional mathematical apparatus such as nonidentical relations, degenerate transformations and the transition from nonintegrable manifolds to integrable structures. Such results show that mathematical physics equations can describe quantum processes. 展开更多
关键词 Integrability Conditions of Differential Equations Double Solutions Realization of Integrable Structures Discrete Transitions Emergence of Various Structures and Observed Formations
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Review on Artificial Intelligence-aided Life Extension Assessment of Offshore Wind Support Structures 认领 引用 被引量：4
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作者 B.Yeter Y.Garbatov C.Guedes Soares 《Journal of Marine Science and Application》 CSCD 2022年第4期26-54,共29页
The primary objective of the present literature review is to provide a constructive and systematical discussion based on the relevant development,unsolved issues,gaps,and misconceptions in the literature regarding the... The primary objective of the present literature review is to provide a constructive and systematical discussion based on the relevant development,unsolved issues,gaps,and misconceptions in the literature regarding the fields of study that are building blocks of artificial intelligence-aided life extension assessment for offshore wind turbine support structures.The present review aims to set up the needed guidelines to develop a multi-disciplinary framework for life extension management and certification of the support structures for offshore wind turbines using artificial intelligence.The main focus of the literature review centres around the intelligent risk-based life extension management of offshore wind turbine support structures.In this regard,big data analytics,advanced signal processing techniques,supervised and unsupervised machine learning methods are discussed within the structural health monitoring and condition-based maintenance planning,the development of digital twins.Furthermore,the present review discusses the critical failure mechanisms affecting the structural condition,such as high-cycle fatigue,low-cycle fatigue,fracture,ultimate strength,and corrosion,considering deterministic and probabilistic approaches. 展开更多
关键词 Offshore wind Life extension Artificial intelligence Fatigue Structural integrity Corrosion-related cracking Risk-based maintenance
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Study of bonding layer for integrated structure of space gravitational wave detector telescope 认领 引用 被引量：1
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作者 ZHAO Hong-chao LIU Chang +2 位作者 ZHOU Wen-ke ZHU Han-bin CHEN Wen-duo 《中国光学（中英文）》 EI CAS CSCD 北大核心 2025年第3期715-724,共10页
To detect space gravitational waves in the extremely low-frequency band,the telescope and optic-al platform require high stability and reliability.However,the cantilevered design presents challenges,espe-cially in the... To detect space gravitational waves in the extremely low-frequency band,the telescope and optic-al platform require high stability and reliability.However,the cantilevered design presents challenges,espe-cially in the glass-metal hetero-bonding process.This study focuses on the analysis and experimental re-search of the bonding layer in the integrated structure.By optimizing the structural configuration and select-ing suitable bonding processes,the reliability of the telescope system is enhanced.The research indicates that using J-133 adhesive achieves the best performance,with a bonding layer thickness of 0.30 mm and a metal substrate surface roughness of Ra 0.8.These findings significantly enhance the reliability of the optical sys-tem while minimizing potential risks. 展开更多
关键词 space gravitational-wave detector integrated structure glass-metal hetero-bonding
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Sulfur atom occupying surface oxygen vacancy to boost the charge transfer and stability for aqueous Bi2O3electrode 认领 引用
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作者 Guangmin Yang Jianyan Lin +3 位作者 Guanwu Li Tian Li Dong Wang Weitao Zheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2025年第2期751-759,I0016,共9页
Oxygen vacancies(Ov)within metal oxide electrodes can enhance mass/charge transfer dynamics in energy storage systems.However,construction of surface Ovoften leads to instability in electrode structure and irreversibl... Oxygen vacancies(Ov)within metal oxide electrodes can enhance mass/charge transfer dynamics in energy storage systems.However,construction of surface Ovoften leads to instability in electrode structure and irreversible electrochemical reactions,posing a significant challenge.To overcome these challenges,atomic heterostructures are employed to address the structural instability and enhance the mass/charge transfer dynamics associated with phase conversion mechanism in aqueous electrodes,Herein,we introduce an atomic S-Bi2O3heterostructure(sulfur(S)anchoring on the surface Ovof Bi2O3).The integration of S within Bi2O3lattice matrix triggers a charge imbala nce at the heterointerfaces,ultimately resulting in the creation of a built-in electric field(BEF).Thus,the BEF attracts OH-ions to be adsorbed onto Bi within the regions of high electron cloud overlap in S-Bi2O3,facilitating highly efficient charge transfer.Furthermore,the anchored S plays a pivotal role in preserving structural integrity,thus effectively stabilizing the phase conversion reaction of Bi2O3.As a result,the S-Bi2O3electrode achieves72.3 mA h g-1at 10 A g-1as well as high-capacity retention of 81.9%after 1600 cycles.Our innovative SBi2O3design presents a groundbreaking approach for fabricating electrodes that exhibit efficient and stable mass and charge transfer capabilities.Furthermore,it enhances our understanding of the underlying reaction mechanism within energy storage electrodes. 展开更多
关键词 Oxygen vavancy Atomic heterostructure Structural integrity Charge/mass transfer Anchoring effect
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Functional identification of saline-alkali stress enhancing gene GATL1 in apple(Malus halliana) 认领 引用
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作者 Xiu Wang Juanli Li +1 位作者 Zhongxing Zhang Yanxiu Wang 《Fruit Research》 2025年第1期419-428,共10页
Pectin is an essential component of the plant cell wall and is critical for maintaining the structural integrity of the plant and protecting it from biotic and abiotic stresses.Galacturonosyltransferase-like(GATL),a c... Pectin is an essential component of the plant cell wall and is critical for maintaining the structural integrity of the plant and protecting it from biotic and abiotic stresses.Galacturonosyltransferase-like(GATL),a crucial enzyme within the pectin synthesis route,governs the biosynthesis and accumulation of pectin.In this study,MhGATL1,cloned from Malus halliana,was significantly upregulated under saline-alkali stress conditions.The MhGATL1 gene was transformed into Arabidopsis,tobacco,and apple callus through Agrobacterium-mediated transformation to obtain transgenic materials.Their tolerance to saline-alkali stress was appraised through various physiological and biochemical assays.Meanwhile,the yeast two-hybrid(Y2H)approach was adopted to identify and corroborate the interacting proteins.The results revealed that transgenic plants exhibited superior growth under stress conditions,as manifested by increased pectin content,elevated levels of chlorophyll and proline,enhanced activities of antioxidant enzymes(SOD,POD,CAT),decreased conductivity and MDA content,and a more favorable Na+/K+ratio in comparison to wild-type plants.Furthermore,genes related to salinity stress and key pectin synthesis pathway genes were significantly upregulated in the overexpression lines compared to the wild type.Y2H experiments further demonstrated that MhGATL1 interacts with several proteins,including MhbZIP23,MhSOS2,MhUGE5,MhABI3,and MhCHI.These results suggest that MhGATL1 positively regulates plant saline-alkali tolerance.Thus,this gene holds great promise as a useful genetic resource for the development of apple varieties with enhanced tolerance to saline-alkali conditions. 展开更多
关键词 Galacturonosyltransferase gene Pectin apple callus throu Saline alkali stress Yeast two hybrid malus hallianawas maintaining structural integrity plant cell wall
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Investigation of Residual Stress Distribution and Its Influence on Machining Deformation in 6061-T651 Aluminum Alloy Plates Using Crack Compliance Method 认领 引用 被引量：2
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作者 HE Wenbo FAN Longxin +2 位作者 YUAN Weidong YANG Yinfei XU Jiuhua 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI CSCD 2025年第3期287-296,共10页
To investigate the residual stress distribution and its influence on machining deformation in 6061-T651 aluminum alloy plates,this paper uses the crack compliance method to study the residual stress characteristics of... To investigate the residual stress distribution and its influence on machining deformation in 6061-T651 aluminum alloy plates,this paper uses the crack compliance method to study the residual stress characteristics of 6061-T651 aluminum alloy plates with a thickness of 75 mm produced by two domestic manufacturers in China.The results indicate that both types of plates exhibit highly consistent and symmetrical M-shaped residual stress profile along the thickness direction,manifested as surface layer compression and core tension.The strain energy density across all specimens ranges from 1.27 kJ/m3to 1.43 kJ/m3.Machining deformation simulations of an aerospace component incorporating these measured stresses showed minimal final deformation difference between the material sources,with a maximum deviation of only 0.009 mm across specimens.These findings provide critical data for material selection and deformation control in aerospace manufacturing. 展开更多
关键词 residual stress aluminum alloy pre-stretched plate crack compliance method integrated structural components machining deformation
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Use of Scaled Models to Evaluate Reinforcement Efficiency in Damaged Main Gas Pipelines to Prevent Avalanche Failure 认领 引用 被引量：1
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作者 Nurlan Zhangabay Marco Bonopera +2 位作者 Konstantin Avramov Maryna Chernobryvko Svetlana Buganova 《Computer Modeling in Engineering & Sciences》 SCIE EI 2025年第10期241-261,共21页
This research extends ongoing efforts to develop methods for reinforcing damaged main gas pipelines to prevent catastrophic failure.This study establishes the use of scaled-down experimental models for assessing the d... This research extends ongoing efforts to develop methods for reinforcing damaged main gas pipelines to prevent catastrophic failure.This study establishes the use of scaled-down experimental models for assessing the dynamic strength of damaged pipeline sections reinforced with wire wrapping or composite sleeves.A generalized dynamic model is introduced for numerical simulation to evaluate the effectiveness of reinforcement techniques.The model incorporates the elastoplastic behavior of pipe and wire materials,the influence of temperature on mechanical properties,the contact interaction between the pipe and the reinforcement components(including pretensioning),and local material failure under transient internal pressure.Based on these parameters,a finite element model was developed using ANSYS 19.2 to enable parametric studies.The accuracy of the proposed model was verified by comparing the simulation results with the experimental findings.Pipeline section samples containing non-penetrating longitudinal crackswere subjected to comparative analyses and transient pressure until critical failure.The unreinforced and steel wire-wrapped sections were investigated.The results confirm the feasibility of applying the computational model to study the dynamic strength of reinforced damaged pipe sections.Furthermore,pipelines with longitudinal cracks reinforced using circular composite overlays with orthotropic mechanical properties were examined,and recommendations are provided for selecting the geometric parameters of such overlays. 展开更多
关键词 Composite overlay crack-like defect finite-element local failure multiscale modeling pipeline safety structural integrity thin-walled structure
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Probiotic efficacy of Cetobacterium somerae(CGMCC No.28843):promoting intestinal digestion,absorption,and structural integrity in juvenile grass carp(Ctenopharyngodon idella) 认领 引用 被引量：1
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作者 Yuanxin Chen Weidan Jiang +9 位作者 Pei Wu Yang Liu Yaobin Ma Hongmei Ren Xiaowan Jin Jun Jiang Ruinan Zhang Hua Li Lin Feng Xiaoqiu Zhou 《Journal of Animal Science and Biotechnology》 SCIE CAS CSCD 2025年第5期2370-2388,共19页
Background Cetobacterium somerae,a symbiotic microorganism resident in various fish intestines,is recognized for its beneficial effects on fish gut health.However,the mechanisms underlying the effects of C.somerae on ... Background Cetobacterium somerae,a symbiotic microorganism resident in various fish intestines,is recognized for its beneficial effects on fish gut health.However,the mechanisms underlying the effects of C.somerae on gut health remain unclear.In this experiment,we investigated the influence of C.somerae(CGMCC No.28843)on the growth performance,intestinal digestive and absorptive capacity,and intestinal structural integrity of juvenile grass carp(Ctenopharyngodon idella)and explored its potential mechanisms.Methods A cohort of 2,160 juvenile grass carp with an initial mean body weight of 11.30±0.01 g were randomly allocated into 6 treatment groups,each comprising 6 replicates(60 fish per replicate).The experimental diets were supplemented with C.somerae at graded levels of 0.00(control),0.68×109,1.35×109,2.04×109,2.70×109,and 3.40×109cells/kg feed.Following a 10-week experimental period,biological samples were collected for subsequent analyses.Results Dietary supplementation with C.somerae at 1.35×109cells/kg significantly enhanced growth performance,intestinal development,and nutrient retention rate in juvenile grass carp(P<0.05).The treatment resulted in increased intestinal acetic acid concentration and enhanced activities of digestive enzymes and brush border enzymes(P<0.05).Furthermore,it reduced intestinal permeability(P<0.05),preserved tight junctions(TJ)ultrastructural integrity,and increased the expression of TJ and adherens junctions(AJ)biomarkers at both protein and transcriptional levels(P<0.05).Mechanistically,these effects may be correlated with enhanced antioxidant capacity and coordinated modulation of the RhoA/ROCK,Sirt1,and PI3K/AKT signaling pathways.The appropriate supplementation levels,based on weight gain rate,feed conversion ratio,the activity of serum diamine oxidase and the content of lipopolysaccharide,were 1.27×109,1.27×109,1.34×109and 1.34×109cells/kg,respectively.Conclusions C.somerae improved intestinal digestive and absorptive capacity of juvenile grass carp,maintained intestinal structural integrity,and thus promoted their growth and development.This work demonstrates the potential of C.somerae as a probiotic for aquatic animals and provides a theoretical basis for its utilization in aquaculture. 展开更多
关键词 Cetobacterium somerae(CGMCC No.28843) Ctenopharyngodon idella Digestive and absorptive capacity Intestinal structural integrity Growth performance
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Stress Intensity Factor,Plastic Limit Pressure and Service Life Assessment of a Transportation-Damaged Pipe with a High-Aspect-Ratio Axial Surface Crack 认领 引用
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作者 Božo Damjanovic Pejo Konjatic Marko Katinic 《Computer Modeling in Engineering & Sciences》 SCIE EI 2025年第11期1735-1753,共19页
Ensuring the structural integrity of piping systems is crucial in industrial operations to prevent catastrophic failures and minimize shutdown time.This study investigates a transportation-damaged pipe exposed to high... Ensuring the structural integrity of piping systems is crucial in industrial operations to prevent catastrophic failures and minimize shutdown time.This study investigates a transportation-damaged pipe exposed to high-temperature conditions and cyclic loading,representing a realistic challenge in plant operation.The objective was to evaluate the service life and integrity assessment parameters of the damaged pipe,subjected to 22,000 operational cycles under two daily charge and discharge conditions.The flaw size in the damaged pipe was determined based on a failure assessment procedure,ensuring a conservative and reliable input.The damage was characterized as a long axial surface crack with a depth of a=2 mm and half-length c=50 mm(c/a=25),a geometry not well covered by existing Stress Intensity Factor solutions.To address this limitation,a modified magnification factor(M*)was introduced and tested for the present damage case(c/a=25)and for additional crack geometries(c/a=28–70),which showed improved agreement with Finite Element Analysis(FEA)than Newman’s original formulation.Stress Intensity Factor and Plastic Limit Pressure,essential parameters for structural integrity assessment,were computed numerically using FEA and validated against analytical predictions.Fatigue crack growth was evaluated using the Paris law with crack propagation simulated numerically by Ansys’s S.M.A.R.T.The Failure Assessment Diagram(FAD)was used to assess service life,incorporating constant working pressure and fracture toughness while considering evolving crack size during propagation.Results showed that analytical predictions with the modified magnification factor matched FEA within 5%,while the original Newman formulation overestimated results.The analytical service life solution predicted approximately 8500 fewer cycles than the numerical,remaining conservative but efficient.These findings are based on the present case of a long axial surface crack with high aspect ratios(c/a=25–70,depending on crack depth),and while the modified magnification factor may also improve predictions for other geometries,this requires structured validation in future studies. 展开更多
关键词 Stress intensity factor plastic limit pressure structural integrity fatigue crack growth failure assessment diagram(FAD)
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Improving the damage potential of W-Zr reactive structure material under extreme loading condition 认领 引用 被引量：14
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作者 Lu-yao Wang Jian-wei Jiang +2 位作者 Mei Li Jian-bing Men Shu-you Wang 《Defence Technology（防务技术）》 SCIE EI CAS CSCD 2021年第2期467-477,共11页
Projectiles made of reactive structure materials(RSM)can damage the target with not only kinetic but also chemical energy,but the enhanced damage potential of RSM may become compromised if extreme loading condition di... Projectiles made of reactive structure materials(RSM)can damage the target with not only kinetic but also chemical energy,but the enhanced damage potential of RSM may become compromised if extreme loading condition disintegrates the projectile before the target is reached.In this work,a ductile coating of Ni was introduced to a tungsten-zirconium(W-Zr)alloy,a typical brittle RSM,to preserve the damage potential of the projectile.Detonation driving tests were carried out with X-ray photography and gunpowder deflagration driving tests were carried out with high-speed photography for the coated and uncoated RSM samples,respectively.The craters on the witness target were analyzed by scanning electron microscopy and X-ray diffraction.The Ni coating was found to effectively preserve the damage potential of the W-Zr alloy under extreme loading conditions,whereas the uncoated sample fractured and ignited before impacting the target in both detonation and deflagration driving.The crack propagation between the reactively brittle core and the ductile coating was analyzed based on the crack arrest theory to mechanistically demonstrate how the coating improves the structural integrity and preserves the damage potential of the projectile.Specifically,the Ni coating envelops theW-Zr core until the coated sphere penetrates the target,and the coating is then eroded and worn to release the reactive core for the projectile to damage the target more intensively. 展开更多
关键词 Reactive structure material Extreme loading Structural integrity Damage potential
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CoB and BN composites enabling integrated adsorption/catalysis to polysulfides for inhibiting shuttle-effect in Li-S batteries 认领 引用 被引量：7
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作者 Tianli Wu Ting Yang +4 位作者 Jizong Zhang Xuewen Zheng Kunlin Liu Chengyang Wang Mingming Chen 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2021年第8期220-228,I0005,共9页
Lithium-sulfur(Li-S)batteries are hampered by the infamous shuttle effect and slow redox kinetics,resulting in rapid capacity decay.Herein,a bifunctional catalysis CoB/BN@rGO with integrated structure and synergy effe... Lithium-sulfur(Li-S)batteries are hampered by the infamous shuttle effect and slow redox kinetics,resulting in rapid capacity decay.Herein,a bifunctional catalysis CoB/BN@rGO with integrated structure and synergy effect between adsorption and catalysis is proposed to solve the above problems.The integrated CoB and BN are simultaneously and uniformly introduced on the rGO substrate through a one-step calcination strategy,applied to modify the cathode side of PP separator.The transition metal borides can catalyze the conversion of lithium polysulfides(Li2Sn,n≥4),whereas the bond of B-S is too weak to absorb LPS.Thus BN introduced can effectively restrict the diffusion of polysulfides via strong chemisorption with LiSnLi+…N,while the rGO substrate ensures smooth electron transfer for redox reaction.Therefore,through the integrated adsorption/catalysis,the shuttle effect is suppressed,the kinetics of redox reaction is enhanced,and the capacity decay is reduced.Using CoB/BN@rGO modified PP separator,the Li-S batteries with high initial capacity(1450 mAh g-1at 0.35 mA cm-2)and long-cycle stability(700 cycles at 1.74 mA cm-2with a decay rate of 0.032%per cycle)are achieved.This work provides a novel insight for the preparation of bifunctional catalysis with integrated structure for long-life Li-S batteries. 展开更多
关键词 Integrated structure Synergy effect Bifunctional catalysis Separator Li-S batteries
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Three-phase Enriched Environment Improves Post-stroke Gait Dysfunction via Facilitating Neuronal Plasticity in the Bilateral Sensorimotor Cortex:A Multimodal MRI/PET Analysis in Rats 认领 引用 被引量：7
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作者 Yun Lu Ziyue Lin +5 位作者 Mingcong Li Yuming Zhuang Binbin Nie Jianfeng Lei Yuanyuan Zhao Hui Zhao 《Neuroscience Bulletin》 SCIE CAS CSCD 2024年第6期719-731,共13页
The three-phase Enriched Environment(EE)paradigm has been shown to promote post-stroke functional improvement,but the neuronal mechanisms are still unclear.In this study,we applied a multimodal neuroimaging protocol c... The three-phase Enriched Environment(EE)paradigm has been shown to promote post-stroke functional improvement,but the neuronal mechanisms are still unclear.In this study,we applied a multimodal neuroimaging protocol combining magnetic resonance imaging(MRI)and positron emission tomography(PET)to examine the effects of post-ischemic EE treatment on structural and functional neuroplasticity in the bilateral sensorimotor cortex.Rats were subjected to permanent middle cerebral artery occlusion.The motor function of the rats was examined using the DigiGait test.MRI was applied to investigate the EE-induced structural modifications of the bilateral sensorimotor cortex.[18F]-fluorodeoxyglucose PET was used to detect glucose metabolism.Blood oxygen level-dependent(BOLD)-functional MRI(fMRI)was used to identify the regional brain activity and functional connectivity(FC).In addition,the expression of neuroplasticity-related signaling pathways including neurotrophic factors(BDNF/CREB),axonal guidance proteins(Robo1/Slit2),and axonal growth-inhibitory proteins(NogoA/NgR)as well as downstream proteins(RhoA/ROCK)in the bilateral sensorimotor cortex were measured by Western blots.Our results showed the three-phase EE improved the walking ability.Structural T2 mapping imaging and diffusion tensor imaging demonstrated that EE benefited structure integrity in the bilateral sensorimotor cortex.PET-MRI fused images showed improved glucose metabolism in the corresponding regions after EE intervention.Specifically,the BOLD-based amplitude of low-frequency fluctuations showed that EE increased spontaneous activity in the bilateral motor cortex and ipsilateral sensory cortex.In addition,FC results showed increased sensorimotor connectivity in the ipsilateral hemisphere and increased interhemispheric motor cortical connectivity and motor cortical-thalamic connectivity following EE intervention.In addition,a strong correlation was found between increased functional connectivity and improved motor performance of limbs.Specifically,EE regulated the expression of neuroplasticity-related signaling,involving BDNF/CREB,Slit2/Robo1,as well as the axonal growth–inhibitory pathways Nogo-A/Nogo receptor and RhoA/ROCK in the bilateral sensorimotor cortex.Our results indicated that the three-phase enriched environment paradigm enhances neuronal plasticity of the bilateral sensorimotor cortex and consequently ameliorates post-stroke gait deficits.These findings might provide some new clues for the development of EE and thus facilitate the clinical translation of EE. 展开更多
关键词 Enriched environment Gait function Neuronal plasticity Structural integrity Glucose metabolism Functional connectivity Microenvironmental molecules Axonogenesis
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