检索结果-南通市图书馆

Crack propagation and damage evolution of metallic cylindrical shells under internal explosive loading

Defence Technology（防务技术） 2024年第9期39卷 133-146页

作者： Yusong luo Weibing Li Junbao Li Wenbin Li Xiaom.ng Wang ZnDY of m.nisterial Key Laboratory Nanjing University of Science and TechnologyNanjing210094China

This paper investigates the three-dim.nsional crack propagation and damage evolution process of metallic column shells under internal explosive *** calibration of four typical failure parameters for 40CrmnSiB steel was conducted through experim.nts and subsequently applied to *** numerical simulation results employing the four failure criteria were compared with the differences and similarities observed in freeze-recovery tests and ultra-high-speed *** analysis addressed the critical issue of determ.ning failure criteria for the fracture of a metal shell under internal explosive *** upon this foundation,the damage parameter D_(c),linked to the cumulative crack density,was defined based on the evolution characteristics of a substantial number of *** relationship between the damage parameter and crack velocity over time was established,and the influence of the internal central pressure on the damage parameter and crack velocity was *** in the fracture modes were found under different failure criteria,with the principal strain failure criterion proving to be the most effective for simulating 3D crack propagation in a pure shear fracture *** statistical analysis of the shell penetration fracture radius data,it was determ.ned that the fracture radius remained essentially constant during the crack evolution process and could be considered a *** propagation velocity of axial cracks ranged between 5300 m/s and 12600 m/s,surpassing the Rayleigh wave velocity of the shell material and decreasing linearly with *** increase in shell damage exhibited an initial rapid phase,followed by deceleration,dem.nstrating accelerated damage during the propagation stage of the blast wave and decelerated damage after the arrival of the rarefaction *** study provides an effective approach for investigating crack propagation and damage *** derived crack propagation and damage evolution law s

关键词： Internal explosive loading Failure criterion Crack propagation Damage evolution Freeze-recovery test

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Oral delivery of ferroptosis inducers for effective treatm.nt of hepatic fibrosis

引用

nano Research 2024年第8期17卷 7621-7630页

作者： Yinglan Yu Shunlong Zhang Yongfeng Xu Hao Shao Lei luo College of Pharmaceutical Sciences Southwest UniversityChongqing 400715China

Liver fibrosis is characterized by the excessive accumulation of extracellular matrix(ECm),which is primarily produced by activated hepatic stellate cells(HSCs).However,effective therapies for hepatic fibrosis are currently *** is a promising anti-fibrotic drug candidate,but its clinical application is hindered by limited ***,we present a novel oral delivery platform that enhances the HSCs uptake of artesunate and induces potent *** platform is vitam.n Adecorated nanoparticles encapsulated with *** multifunctional ligand vitam.n A interacts with retinol-binding proteins that are highly expressed on the intestinal epithelium to promote transcytosis,highly expressed on the surface of HSCs but lowly expressed in normal *** oral adm.nistration,this oral delivery platform enhances transepithelial transport in the intestine,improves drug accumulation in the liver,and continuously increases HSCs uptake of *** drug release in HSCs,artesunate depletes glutathione peroxidase 4 and glutathione,effectively initiating *** vivo experim.nts dem.nstrate that this strategy induces pronounced ferroptosis,efficiently relieving liver *** work provides a proof-ofconcept dem.nstration that an oral delivery strategy for ferroptosis inducers may be beneficial for liver fibrosis treatm.nt.

关键词： liver fibrosis hepatic stellate cells oral delivery intestinal epithelium ferroptosis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

SubEpiPredict:A tutorial-based primer and toolbox for fitting and forecasting growth trajectories using the ensemble n-sub-epidemic modeling framework

引用

Infectious Disease modelling 2024年第2期9卷 411-436页

作者： Gerardo Chowell Sushma Dahal Am.nda Bleichrodt Amna Tariq James m.Hym.n Ruiyan luo Departm.nt of Population Health Sciences School of Public HealthGeorgia State UniversityAtlantaGAUSA Departm.nt of International Epidemiology and Population Studies Fogarty International CenterNational Institutes of HealthBethesdaMDUSA Departm.nt of Pediatrics School of MedicineStanford UniversityPalo AltoCAUSA Departm.nt of mathematics Center for Computational ScienceTulane UniversityNew OrleansLAUSA

An ensemble n-sub-epidemic modeling framework that integrates sub-epidemics to capture complex temporal dynamics has dem.nstrated powerful forecasting capability in previous *** modeling framework can characterize complex epidemic patterns,including plateaus,epidemic resurgences,and epidemic waves characterized by multiple peaks of different *** this tutorial paper,we introduce and illustrate SubEpiPredict,a user-friendly mATLAB toolbox for fitting and forecasting time series data using an ensemble n-sub-epidemic modeling *** toolbox can be used for model fitting,forecasting,and evaluation of model perform.nce of the calibration and forecasting periods using metrics such as the weighted interval score(WIS).We also provide a detailed description of these methods including the concept of the n-sub-epidemic model,constructing ensemble forecasts from the top-ranking models,*** the illustration of the toolbox,we utilize publicly available daily COVID-19 death data at the national level for the United *** mATLAB toolbox introduced in this paper can be very useful for a wider group of audiences,including policymakers,and can be easily utilized by those without extensive coding and modeling backgrounds.

关键词： n-Sub-epidemic model Forecasting mATLAB Sub-epidemics Phenom.nological models Perform.nce metrics model evaluation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Ant-nest-inspired porous structure for mXene composites with high-perform.nce energy-storage and actuating multifunctions

引用

nano Research 2024年第7期17卷 6673-6685页

作者： Yi Wang Guanfeng Xue Zhiling luo Wei Zhang Luzhuo Chen Fujian Provincial Key Laboratory of Quantum m.nipulation and new Energy materials College of Physics and EnergyFujian Normal UniversityFuzhou 350117China Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting materials and Engineering Fuzhou 350117China

Integrating energy-storage devices(supercapacitors)and shape-deformation devices(actuators)advances the m.niaturization and multifunctional developm.nt of soft ***,soft robots necessitate supercapacitors with high energy-storage perform.nce and actuators with excellent actuation ***,inspired by ant nests,we present a porous structure fabricated by mXene-graphene-methylcellulose(m-GmC)composite,which overcomes the self-stacking of mXene nanosheets and offers a larger specific surface *** porous structure provides more channels and active sites for electrolyte ions,resulting in high energy storage *** areal capacitance of the m-GmC electrode reaches up to 787.9 mF·cm^(−2),significantly superior to that of the pristine mXene electrode(449.1 mF·cm^(−2)).moreover,the m-GmC/polyethylene bilayer composites with energy storage and multi-responsive actuation functions are *** m-GmC is used as the electrode and the polyethylene is used as the encapsulation layer of the quasi-solid-state ***,the actuators fabricated by the bilayer composites can be driven by light or low voltage(≤9 V).The maximum bending curvature is up to 5.11 cm^(−1).Finally,a smart gripper and a fully encapsulated smart integrated circuit based on the m-GmC/polyethylene are *** smart gripper enables programmable control with multi-stage *** applications realize the intelligence and m.niaturization of soft *** ant-nest-inspired m-GmC composites would provide a promising developm.nt strategy for soft robots and smart integrated devices.

关键词： mXene graphene ant nest supercapacitor actuator multi-functional

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Synergistic effect of Co and Co_(6)mo_(6)C for electroreduction of nitrate to amm.nia on Co-mOF derived Co_(6)mo_(6)C/Co/nC

引用

nano Research 2024年第7期17卷 5807-5816页

作者： Xinyan Wang Yue Cao Yan Hai Xiaom.n Li m.n luo State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering School of Chemistry and Chemical EngineeringNingxia UniversityYinchuan 750021China

Electrocatalytic nitrate reduction reaction(e-nO_(3)RR)offers a promising alternative method for nitrogen cycling and amm.nia(nH3)production under ambient ***,the method is still in the dilemma of lowering the reaction overpotential and increasing the reaction *** successfully developed the composition-adjustable Co_(6)mo_(6)C/Co/n-doped carbon(nC)catalysts by in situ carbonization of Co-based metal-organic framework(mOF)with the constrained phosphomolybdic *** adjusting the ratio of Co0 and Co_(6)mo_(6)C,Co_(6)mo_(6)C/Co/nC-3 could satisfy both nO_(3)−conversion at low potential and nH_(x)hydrogenation,and synthesize amm.nia efficiently through the synergistic effect of Co0 and Co_(6)mo_(6)*** achieved an amm.nia yield rate as 1233.2μg·h^(−1)·mgcat^(−1)and Faradaic efficiency of nH4+93.6%at−0.33 V *** hydrogen electrode(RHE).Importantly,density functional theory(DFT)calculations and experim.ntal results have dem.nstrated for the first time the excellent adsorption of nitrite(nO_(2)^(−))by the mo sites of Co_(6)mo_(6)C during e-nO_(3)RR,avoiding the undesirable accumulation of nO_(2)^(−).

关键词： synergistic effect nitrate electroreduction Co_(6)mo_(6)C amm.nia synthesis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Empirical model for fusion cross sections of Ca-induced reactions

引用

Chinese Physics C 2024年第3期48卷 126-132页

作者： Reddi Rani.L n.Sowmya K.n Sridhar H C.m.njunatha m.m.Armstrong Arasu Departm.nt of Physics St.Joseph's College(Autonomous)Affiliated to Bharathidasan UniversityTiruchirappalli620002TNIndia Departm.nt of Physics Govt.First.Grade CollegeChikkaballapur-562101KarnatakaIndia Departm.nt of Physics Govt.First.Grade CollegeMalur-563160KarnatakaIndia Departm.nt of Physics Govt.First.Grade CollegeDevanahalli-562110KarnatakaIndia

A new empirical formula for the astrophysical S-factor has been suggested as a function of the Coulomb interaction parameter,center of mass energy,and barrier *** 22 fusion reactions with ^(40,48)Ca as projectiles were considered for different targets,leading to compound nuclei with atomic and mass numbers varying between 40≤Z≤≤Z≤112 and 88≤A≤27888≤A≤278,*** fusion cross-sections have been estimated using the geometric factor,the Gamow-Sommerfield factor,and the empirical formula for the *** study's findings showed better agreem.nt with those of available experim.nts when compared to Wong's *** present work leads to a smaller standard deviation value than Wong's formula when used to correlate the experim.ntal data of calcium-induced fusion ***'s formula provides a good approximation of fusion cross-sections when the center of mass energy is below the fusion barrier when compared to above the fusion barrier.

关键词： fusion cross-sections Wong formula Gamow-Sommerfield-factor Geometric-factor S-factor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Steering surface reconstruction of hybrid metal oxides for efficient oxygen evolution reaction in water splitting and zinc-air batteries

引用

Journal of Energy Chemistry 2024年第5期92卷 383-393页

作者： Jie Zhu Junxue Chen Xida Li Kun luo Zewei Xiong Zhiyu Zhou Wenyun Zhu Zhihong luo Jingbin Huang Yibing Li Key Lab of new Processing Technology for nonferrous metals and materials Ministry of EducationSchool of Materials Science and EngineeringGuilin University of TechnologyGuilin 541000GuangxiChina The Key Laboratory of Rare Earth Functional materials and Applications Zhoukou Normal UniversityZhoukou 466001HenanChina School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 100081China School of materials Science and Engineering Changzhou UniversityChangzhou 213164JiangsuChina Wuhan Sunmoon Battery Co. LtdWuhan 430090HubeiChina

Surface reconstruction yields real active species in electrochemical oxygen evolution reaction(OER)conditions;however,rationally regulating reconstruction in a targeted m.nner for constructing highly active OER electrocatalysts remains a formidable ***,an electrochemical activation strategy with selective etching was utilized to guide the reconstruction process of a hybrid cobalt-molybdenum oxide(ComoO_(4)/Co_(3)O_(4)@CC)in a favorable direction to improve the OER *** in-situ Ram.n and multiple ex-situ characterization tools dem.nstrate that controlled surface reconstruction can be easily achieved through mo etching,with the formation of a dynamically stable amorphous-crystalline *** calculations together with experim.ntal results reveal that the synergistic effects between amorphous CoOOH and crystalline Co_(3)O_(4) are crucial in enhancing the catalytic ***,the reconstructed ComoO_(4)/Co_(3)O_(4)@CC exhibits a low overpotential of 250 mV to achieve a current density of 10 mA cm^(-2) in 1 m KOH,and more importantly it can be practiced in electrolytic water splitting and rechargeable zinc-air batteries devices,achieving ultra-long stability for over 500 and 1200 h,*** work provides a promising route for the construction of high-perform.nce electrocatalysts.

关键词： Electrocatalyst Oxygen evolution reaction Surface reconstruction Selective etching Amorphous-crystalline heterostructures

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A robust vector tracking loop structure based on potential bias analysis

引用

Chinese Journal of Aeronautics 2024年第4期37卷 405-420页

作者： Qiongqiong JIA Yiran luo Bing XU Li-Ta HSU Renbiao WU Tianjin Key Lab for Advanced Signal Processing Civil Aviation University of ChinaTianjin 300300China Interdisciplinary Division of Aeronautical and Aviation Engineering The Hong Kong Polytechnic University999077Hong KongChina Departm.nt of Geomatics Engineering University of CalgaryCalgary T2N1N4Canada

This paper proposes a robust vector tracking loop structure based on potential bias analysis. The influence of four kinds of biases on the existing two implem.ntations of Vector Tracking Loops(VTLs) is illustrated by theoretical analysis and numerical simulations, and the following findings are obtained. Firstly, the initial user state bias leads to steady navigation solution bias in the relative VTL, while new measurem.nts can elim.nate it in the absolute VTL. Secondly, the initial code phase bias is transferred to the following navigation solutions in the relative VTL, while new measurem.nts can elim.nate it in the absolute VTL. Thirdly, the user state bias induced by erroneous navigation solution of VTLs can be elim.nated by both of the two VTLs. Fourthly,the multipath/nLOS likely affects the two VTLs, and the induced tracking bias in the duration of the multipath/nLOS would decrease the perform.nce of VTLs. Based on the above analysis,a robust VTL structure is proposed, where the absolute VTL is selected for its robustness to the two kinds of initialization biases;meanwhile, the instant bias detection and correction method is used to improve the perform.nce of VTLs in the duration of the multipath/nLOS. numerical simulations and experim.ntal results verify the effectiveness of the proposed robust VTL structure.

关键词： Global navigation Satellite System(GnSS) Vector Tracking Loop(VTL) multipath non-Line-of-Sight(nLOS) Tracking bias propagation Least Absolute Shrinkage and Selection Operator(LASSO)

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Effect of solvent on the initiation mechanism of living anionic polymerization of styrene:A computational study

引用

Chinese Journal of Chemical Engineering 2024年第5期69卷 135-142页

作者： Shen Li Yin-ning Zhou Zhong-Xin Liu Zheng-Hong luo School of Chemical Engineering and Technology Hainan UniversityHaikou 570228China Departm.nt of Chemical Engineering School of Chemistry and Chemical EngineeringState Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai 200240China

For living anionic polymerization(LAP),solvent has a great influence on both reaction mechanism and *** this work,by using the classical butyl lithium-styrene polymerization as a model system,the effect of solvent on the mechanism and kinetics of LAP was revealed through a strategy combining density functional theory(DFT)calculations and kinetic *** terms of mechanism,it is found that the stronger the solvent polarity,the more electrons transfer from initiator to solvent through detailed energy decomposition analysis of electrostatic interactions between initiator and solvent ***,we also found that the stronger the solvent polarity,the higher the m.nomer initiation energy barrier and the smaller the initiation rate ***,initiation is more favorable at lower temperatures based on the calculated results ofΔG_(TS).Finally,the kinetic characteristics in different solvents were further exam.ned by kinetic *** is found that in benzene and n-pentane,the polymerization rate exhibits first-order ***,slow initiation and fast propagation were observed in tetrahydrofuran(THF)due to the slow free ion formation rate,leading to a deviation from first-order kinetics.

关键词： Living anionic polymerization Solvent effect Reaction kinetics Computational chemistry mathematical modeling Kinetic modeling

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A novel method for Determ.ning the Void Fraction in Gas-Liquid multi-Phase Systems Using a Dynamic Conductivity Probe

引用

Fluid Dynamics & materials Processing 2024年第6期20卷 1233-1249页

作者： Xiaochu luo Xiaobing Qi Zhao luo Zhonghao Li Ruiquan Liao Xingkai Zhang Hubei Key Laboratory of Oil and Gas Drilling and Production Engineering Yangtze UniversityWuhan434000China Oil and Gas Engineering Research Institute PetroChina Tarim Oilfield CompanyKorla84100China Xinjiang Kunlun Engineering Consulting Co. Ltd.Karamay834000China Petrochina Dagang Oilfield Company Production Technology Research Institute Tianjin300000China

Conventional conductivity methods for measuring the void fraction in gas-liquid multiphase systems are typically affected by accuracy problems due to the presence of fluid flow and *** study presents a novel approach for determ.ning the void fraction based on a reciprocating dynamic conductivity probe used to measure the liquid film thickness under forced annular-flow *** measurem.nt system comprises a cyclone,a conductivity probe,a probe reciprocating device,and a data acquisition and processing *** method ensures that the flow pattern is adjusted to a forced annular flow,thereby m.nimizing the influence of complex and variable gas-liquid flow patterns on the measurem.nt results;moreover,it determ.nes the liquid film thickness solely according to circuit connectivity rather than specific conductivity values,thereby mitigating the impact of *** reliability of the measurem.nt system is dem.nstrated through laboratory *** experim.ntal results indicate that,in a range of gas phase superficial velocities 5–20 m/s and liquid phase superficial velocities 0.079–0.48 m/s,the maximum measurem.nt deviation for the void fraction is 4.23%.

关键词： Forced annular flow dynamic conductivity probe void fraction gas-liquid flow liquid film thickness

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：