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Reinforcing carbonized polyacrylonitrile fibers with nanoscale graphitic interface-layers

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journal of Materials Science & Technology 2021年第36期95卷 78-87页

作者： rahul Franklin Weiheng Xu Dharneedar Ravichandran Sayli jambhulkar Yuxiang Zhu Kenan Song Materials Science and Engineering School for Engineering of MatterTransport and EnergyArizona State UniversityTempeAZ 85287United States System Engineering The Polytechnic School(TPS)Ira A.Fulton Schools of EngineeringArizona State UniversityMesaAZ 85212United Stares Manufacturing Engineering Arizona State UniversityMesaAZ 85212United Stares

Carbon fibers going through stabilization,carbonization,and graphitization heat-treatment stages will form continuous graphitic layers that are closely packed and preferentially aligned along the fiber axis,forming high mechanical stiffness or strength and electrical or thermal *** alignment of noncontinuous,powder-like graphene layers in polymers has been challenging due to the low bending modulus of a few-or even single-layered graphene,which causes aggregations or folding *** research demonstrates the leveraging of polymer-nanoparticle interactions to align graphene nanoplatelets(GNPs)in the polyacrylonitrile(PAN)*** in-house designed spinning method produces a three-layered fiber that utilizes the interfacial interactions between each layer for graphene alignment between graphitic *** composite containing oriented GNPs significantly improves modulus(i.e.,42.3 to 74.6 GPa)and increases electrical conductivity for enhancing volatile organic compounds(VOCs)sensing *** research opens up a new scalable fabrication method for multilayered composites.

关键词： Mechanical property Graphene nanocomposite Multilayer Electrical Sensing

Numerical simulation and experimental study on dissolving characteristics of layered salt rocks

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Chinese journal of Chemical Engineering 2019年第5期27卷 1030-1036页

作者： Qiqi Wanyan Yiming Xiao na Tang China University of Petroleum-Beijing Beijing J02249China College of Chemical Engineering and Material Science Tianjin University of Science and TechnologyTianjin 300457China Tianjin Key Laboratory of Marine Resources and Chemistry Tianjin 300457China

Underground salt cavern reservoirs are ideal spaces for energy storage. China is rich in salt rock resources with layered lacustrine sedimentary structures. However, the dissolution mechanism of layered salt rocks remains poorly understood, resulting in significant differences between the actual measurements and the designed indices for the layered salt rock water-soluble cavity-making cycle and the cavity shape. In this work, the dissolution rates of 600 groups of layered salt rocks in China under different conditions were determined ***, the established artificial neural network prediction model was used to assess the effects of the contents of naCl, na2 SO4, and CaSO4 in the salt rocks, concentrations, dissolution angles, and flow rates on their dissolution rates by performing ANOVA and F-test. The results provide a theoretical basis for evaluating the dissolution rate of layered salt rocks under different conditions and for the numerical simulation of the layered salt rock water-soluble cavity-making process.

关键词： Salt cavern reservoirs Layered salt rock Dissolution rate ANOVA

Enhancing the efectiveness of film cooling

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航空动力学报 2007年第4期22卷 531-539页

作者： Tom I-P Shih Sangkwon na Department of Aerospace Engineering Iowa State University Ames Iowa 50011 U. S. A

Advanced gas turbine stages are designed to operate at increasingly higher inlet temperatures to increase thermal efficiency and specific power *** maintain durability and reasonable life,film cooling is needed in addition to internal cooling,especially for the first *** cooling lowers material temperature by forced convection inside film-cooling holes and by forming a layer of coolant about component surfaces to insulate them from the hot ***,each cooling jet forms a pair of counter-rotating vortices that entrains hot gas and causes the film-cooling jet to lift off from the surface that it is intended to *** paper gives an overview of efforts to enhance the effectiveness of *** paper also describes two new design *** design concept seeks to minimize the entrainment of hot gases underneath of film-cooling jets by using flow-aligned *** other design concept shifts the interaction between the approaching hot gas and the cooling jet to occur further above the surface by using an upstream *** both design concepts,computational fluid dynamics results are presented to examine their usefulness in enhancing film-cooling effectivenes

关键词：航空动力推进系统薄雾冷却冷却效率燃气轮机流体动力学

Unit-cell design for two-dimensional phase-field simulation of microstructure evolution in single-crystal Ni-based superalloys during solidification

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Progress in natural Science:Materials International 2017年第6期27卷 678-686页

作者： Dongjia Cao na Ta Lijun Zhang State Key Lab of Powder Metallurgy Central South University Interdisciplinary Centre for Advanced Materials Simulation (ICAMS) Ruhr-University Bochum

Phase-field simulation serves as an effective tool for quantitative characterization of microstructure evolution in single-crystal Ni-based superalloys during solidification nowadays. The classic unit cell is either limited to γdendrites along crystal orientation or too ideal to cover complex morphologies for γ dendrites. An attempt to design the unit cell for two-dimensional(2-D) phase-field simulations of microstructure evolution in single-crystal Ni-based superalloys during solidification was thus performed by using the MICRESS(MICRostructure Evolution Simulation Software) in the framework of the multi-phase-field(MPF) model,and demonstrated in a commercial TMS-113 superalloy. The coupling to CALPHAD(CALculation of PHAse Diagram) thermodynamic database was realized via the TQ interface and the experimental diffusion coefficients were utilized in the simulation. Firstly, the classic unit cell with a single γ dendrite along crystal orientation was employed for the phase-field simulation in order to reproduce the microstructure ***, such simple unit cell was extended into the cases with two other different crystal orientations, i.e., and . Thirdly, for crystal orientations, the effect of γ dendritic orientations and unit cell sizes on microstructure and microsegregation was comprehensively studied, from which a new unit cell with multiple γdendrites was proposed. The phase-field simulation with the newly proposed unit cell was further performed in the TMS-113 superalloy, and the microstructure features including the competitive growth of γ dendrites,microsegregation of different solutes and distribution of γ′ grains, can be nicely reproduced.

关键词： Ni-based superalloys Solidification Microstructure Phase-field simulation Unit cell

新医科背景下基于EIP-CDIO模式的急危重症护理课程思政教学探究

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卫生职业教育 2025年第1期43卷 23-27页

作者：郑娜戴月吴晶江西卫生职业学院江西南昌330200

在分析急危重症护理课程教学现状与不足之处的基础上,结合新医科人才培养目标,提出基于EIP-CDIO模式下的急危重症护理课程思政教学理念和实施路径:构思环节,明确课程思政育人目标;设计环节,优化课程思政教学团队,重构知识点,深入挖掘知... 详细信息

在分析急危重症护理课程教学现状与不足之处的基础上,结合新医科人才培养目标,提出基于EIP-CDIO模式下的急危重症护理课程思政教学理念和实施路径:构思环节,明确课程思政育人目标;设计环节,优化课程思政教学团队,重构知识点,深入挖掘知识点中蕴含的思政元素;实现环节,运用多种教学方法,将思政元素潜移默化地融入专业知识教授过程;运作环节,构建持续性教学评价机制,促进课程思政教学效果的良性提升。

关键词： EIP-CDIO模式急危重症护理课程思政新医科

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Novel optimized routing algorithm for LEO satellite IP networks

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journal of Systems Engineering and Electronics 2011年第6期22卷 917-925页

作者： Zihe Gao Qing Guo Zhenyu na Communication Research Center Harbin Institute of Technology Harbin 150001 E R. China School of Information Science and Technology Dalian Maritime University Dalian 116026 E R. China

A lot of routing algorithms have been proposed for low earth orbit（LEO） satellite IP networks in recent years,but most of them cannot achieve global *** dynamic characters of LEO satellite networks are reflected in two aspects：topology and traffic *** algorithms mentioned above are ＂hard routing＂ which only realize local optimization.A distributed soft routing algorithm combined with multi-agent system（MASSR） is *** MASSR,mobile agents are used to gather routing information actively,and blackboard is introduced to achieve direct information exchange between *** provides traffic adaptive routing and tracks the change of LEO satellite network *** performance of ant colony optimization（ACO） and MASSR are compared in Iridium constellation,and MASSR presents better end-to-end delay as well as enhanced robustness.

关键词： distributed routing multi-agent system(MAS) satellite IP networks.

Structural dynamic responses of a stripped solar sail subjected to solar radiation pressure

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Chinese journal of Aeronautics 2020年第8期33卷 2204-2211页

作者： junhui ZHANG na WU An TONG Yinghua LIU School of Civil Engineering North China University of TechnologyBeijing 100144China School of Aerospace Engineering Tsinghua UniversityBeijing 100144China

The stripped solar sail whose membrane is divided into separate narrow membrane strips is believed to have the best structural *** this paper,the stripped solar sail structure is regarded as an assembly made by connecting a number of boom-strip components in *** the coupling effects between booms and membrane strips,an exact and semianalytical method to calculate structural dynamic responses of the stripped solar sail subjected to solar radiation pressure is *** case study of a 100 m stripped solar sail shows that the stripped architecture helps to reduce the static deflections and amplitudes of the steady-state dynamic *** prestress of the membrane strips will decrease stiffness of the sail and increase amplitudes of the steady-state dynamic *** thickness of the boom will benefit to stability of the sail and reduce the resonant *** proposed semi-analytical method provides an efficient analysis tool for structure design and attitude control of the stripped solar sail.

关键词： Distributed transfer function method Frequency response Solar radiation pressure Solar sail Structural dynamic response

Role of aminopeptidase N-like in the acquisition of begomoviruses by Bemisia tabaci,the whitefly vector

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Insect Science 2024年第3期31卷 707-719页

作者： Yun-Yun Fan Yao Chi na Chen Wilmer j.Cuellar Xiao-Wei Wang Ministry of Agriculture Key Lab of Molecular Biology of Crop Pathogens and Insects Key Laboratory of Biology of Crop Pathogens and Insects of Zhejiang ProvinceInstitute of Insect SciencesZhejiang UniversityHangzhouChina Zhejiang Tianmushan national nature Reserve Administration HangzhouChina Institute of Plant Protection Liaoning Academy of Agricultural SciencesShenyangChina Virology Laboratory Cassava ProgramInternational Center for Tropical Agriculture(CIAT)PalmiraColombia

Sri Lankan cassava mosaic virus(SLCMV)is a prominent causative agent of cassava mosaic disease in Asia and relies on the whitefly Bemisia tabaci cryptic complex for its ***,the molecular mechanisms involved in SLCMV transmission by *** have yet to be *** this study,we identified an aminopeptidase N-like protein(BtAPN)in *** Asia II 1,an efficient vector of SLCMV,which is involved in the SLCMV transmission *** the use of glutathione S-transferase pull-down assay and LC-MS/MS analysis,we demonstrated the interaction between BtAPN and the coat protein(CP)of *** interaction was further confirmed in vitro,and we observed an induction of BtAPN gene expression following SLCMV *** interfering with the function of BtAPN,the quantities of SLCMV were significantly reduced in various parts of *** Asia II 1,including the whole body,midgut,hemolymph,and primary salivary ***,we discovered that BtAPN is conserved in *** Middle East-Asia Minor 1(MEAM1)and interacts with the CP of tomato yellow leaf curl virus(TYLCV),a begomovirus known to cause severe damage to tomato *** BtAPN with antibody led to a significant reduction in the quantities of TYLCV in whitefly whole body and organs/*** results demonstrate that BtAPN plays a generic role in interacting with the CP of begomoviruses and positively regulates their acquisition by the whitefly.

关键词： BtAPN coat protein SLCMV TYLCV virus acquisition whitefly

基于无监督深度领域对抗适配的在线剩余寿命预测方法

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郑州大学学报（理学版） 2025年第1期57卷 81-87页

作者：刘可盈张艳娜毛文涛王纳河南师范大学计算机与信息工程学院河南新乡453007 智慧商务与物联网技术河南省工程实验室河南新乡453007

为解决未知工况下旋转设备在线剩余寿命(remaining useful life,RUL)预测时计算代价大和误差累积问题,提出一种基于无监督深度领域对抗适配的在线RUL预测方法。首先,利用离线退化数据和在线早期故障数据,构建深度领域对抗网络作为预训... 详细信息

为解决未知工况下旋转设备在线剩余寿命(remaining useful life,RUL)预测时计算代价大和误差累积问题,提出一种基于无监督深度领域对抗适配的在线RUL预测方法。首先,利用离线退化数据和在线早期故障数据,构建深度领域对抗网络作为预训练模型。其次,将在线贯序数据块输入预训练模型的回归预测器中重新领域适配,得到在线伪标签。最后,将预训练模型的结构和参数迁移到目标域模型,冻结目标域模型的部分参数,并利用在线数据块和伪标签对目标域模型剩余参数进行微调,实现在线数据的RUL动态预测。在IEEE PHM Challenge 2012轴承数据集上进行实验,结果表明,所提方法可以贯序、准确地预测在线轴承RUL值,为在线场景下的轴承RUL预测提供了一种实用化的解决方案。

关键词：剩余寿命预测迁移学习领域适配无监督学习在线学习

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