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Numerical Simulation of Sloshing Using the MPS-FSI Method with Large Eddy Simulation

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China Ocean Engineering 2018年第3期32卷 278-287页

作者： YANG Chao zhang Huai-xin SU hui-lin SHEN zhong-xiang State Key Laboratory of Ocean Engineering School of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration(CISSE) Shanghai Jiao Tong UniversityShanghai 200240China PLA Army Engineering University Nanjing 210007China School of Naval Architecture and Ocean Engineering Dalian Maritime UniversityDalian 116026China

A numerical model has been developed to study sloshing of turbulent flow in a tank with elastic baffles. The Moving-Particle Semi-implicit method(MPS) is a kind of meshless Lagrangian calculation method. The large eddy simulation(LES) approach is employed to model the turbulence by using the Smagorinsky Sub-Particle Scale(SPS)closure model. This paper uses MPS-FSI method with LES to simulate the interaction between free surface flow and a thin elastic baffle in sloshing. Then, the numerical model is validated, and the numerical solution has good agreement with experimental data for sloshing in a tank with elastic baffles. Furthermore, under external excitations,the MPS is applied to viscous laminar flow and turbulent flow, with both the deformation of elastic baffles and the wave height of the free surface are compared with each other. Besides, the impact pressure with/without baffles and wave height of free surface are investigated and discussed in detail. Finally, preliminary simulations are carried out in the damage problem of elastic baffles, taking the advantage of the MPS-FSI method in computations of the fluid–structure interaction with large deformation.

关键词： moving particle semi-implicit method(MPS) fluid–structure interaction(FSI) large eddy simulation(LES) meshless sloshing

Mechanical properties of graphene nanoplatelets reinforced 7075 aluminum alloy composite fabricated by spark plasma sintering

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International Journal of Minerals,Metallurgy and Materials 2020年第9期27卷 1295-1300页

作者： hui-min Xia Lan zhang Yong-chao Zhu Na Li Yu-qi Sun Ji-dong zhang hui-zhong Ma School of Mechanics and Engineering Science Zhengzhou UniversityZhengzhou 450000China

A 0.3wt%graphene nanoplatelets(GNPs)reinforced 7075 aluminum alloy matrix(7075 Al)composite was fabricated by spark plasma sintering and its strength and wear resistance were *** microstructures of the internal structure,the friction surface,and the wear debris were characterized by scanning electron microscopy,X-ray diffraction,and Raman *** with the original 7075 aluminum alloy,the hardness and elastic modulus of the 7075 Al/GNPs composite were found to have increased by 29%and 36%,*** results of tribological experiments indicated that the composite also exhibited a lower wear rate than the original 7075 aluminum alloy.

关键词： 7075 aluminum alloy graphene nanoplatelets spark plasma sintering strength wear resistance

Satellite remote sensing reveals overwhelming recovery of forest from disturbances in Asia

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Atmospheric and Oceanic Science Letters 2025年第1期18卷 46-51页

作者： Yiying Zhu Hesong Wang Anzhi zhang School of Ecology and Nature Conservation Beijing Forestry UniversityBeijingChina Key Laboratory of Regional Climate and Environment for Temperate East Asia Institute of Atmospheric PhysicsChinese Academy of SciencesBeijingChina College of Forestry and Landscape Architecture Xinjiang Agricultural UniversityUrumqiChina

Forest ecosystems play key roles in mitigating human-induced climate change through enhanced carbon uptake;however,frequently occurring climate extremes and human activities have considerably threatened the stability of *** the same time,detailed accounts of disturbances and forest responses are not yet well quantified in *** study employed the Breaks For Additive Seasonal and Trend method-an abrupt-change detection method-to analyze the Enhanced Vegetation Index time series in East Asia,South Asia,and Southeast *** approach allowed us to detect forest disturbance and quantify the resilience after *** showed that 20%of forests experienced disturbance with an increasing trend from 2000 to 2022,and Southeast Asian countries were more severely affected by ***,95%of forests had robust resilience and could recover from disturbance within a few *** resilience of forests suffering from greater magnitude of disturbance tended to be stronger than forests with lower disturbance *** summary,this study investigated the resilience of forests across the low and middle latitudes of Asia over the past two *** authors found that most forests exhibited good resilience after disturbance and about two-thirds had recovered to a better state in *** findings of this study underscore the complex relationship between disturbance and resilience,contributing to comprehension of forest resilience through satellite remote sensing.

关键词： Forest ecosystem Enhanced vegetation index Breaks for additive seasonal and trend method Disturbance Resilience

Failure-analysis of carbon nanotubes and their extreme applications

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Nano Research 2023年第11期16卷 12364-12383页

作者： Mingquan Zhu Yunxiang Bai Runyi Gao Yajing Liu Peng zhang hui zhang Luqi Liu zhong zhang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China CAS Key Laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230027China

The study of material failure is crucial for the design of engineering applications,as it can have significant social and economic *** nanotubes(CNTs),with their exceptional electrical,mechanical,and thermal properties,hold immense potential for a wide range of cutting-edge applications such as superstrong fiber,lightning strike protector,and even space *** review provides an overview of the advancement in understanding the mechanical and electrical failure study of CNTs and their assemblies,serving as a comprehensive reference for utilizing CNTs in various *** begin,we emphasize the importance of studying material failure and provide a brief introduction to ***,we explore the mechanical and electrical failure characteristics of CNTs and their assemblies,along with notable examples of applications that utilize their failure-resistant properties,such as flywheel energy storage and lightning strike ***,we present perspectives associated with analyzing CNT failure and its implications for extreme applications.

关键词： carbon nanotubes failure-analysis flywheel energy storage lightning strike protection

A high-strength self-healing nano-silica hydrogel with anisotropic differential conductivity

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Nano Research 2021年第8期14卷 2589-2595页

作者： Xingyu Huang Xiaofan Zhou Hao Zhou Yidan zhong hui Luo Fan zhang Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Jiangsu Provincial Key Lab of Pulp and Paper Science and TechnologyCollege of Light Industry and FoodNanjing Forestry UniversityNanjing 210037China Department of Creative Design Zhicheng CollegeFuzhou UniversityFuzhou 350000China

Soft nano electronic materials based on conductive hydrogels have attracted considerable attention due to their exceptional *** deposition and poor interface compatibility often diminish the mechanical strength and electron transport capabilities of the conductive *** damage can severely impact the performance of the conductive hydrogel and can even damage electronic devices based on the conductive *** the current study,a transparent nano-silica hydrogel is prepared by employing an extremely easy-to-operate *** approach can preclude the deposition of particles via strong mechanical *** addition,controlling the concentration of the reaction interface makes the hydrogel grow along the mechanical force in the direction with a special directional hole structure *** hydrogel is transparent,showing excellent self-healing properties—it can self-heal within 15 ***,the hydrogel after self-healing maintains its ***,it has excellent mechanical properties and can be stretched in *** to 1,200%of the original length,the tensile strength of the gel spline can reach 7 *** viscosity of the hydrogel can reach 1.67×10^(8)(MPs).In addition,a large amount of Na+in this hydrogel endow it a conductivity of 389 ps/*** conductivity of this hydrogel is adjustable result from the special pore ***,the difference between the horizontal and vertical conductivity of the same sample can reach 3-4 times,thus this hydrogel can be used in the field of nano conductive materials.

关键词： self-healing nanosilica hydrogels anisotropic conductivity

DMAO-activated Rare-earth Metal Catalysts for Styrene and Its Derivative Polymerization

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Chinese Journal of Polymer Science 2021年第9期39卷 1185-1190页

作者： Zhen zhang Yang Jiang Kai zhang zhong-Yi Cai Shi-hui Li Dong-Mei Cui College of Materials Science and Engineering Jilin UniversityChangchun 130025China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

The catalytic performa nee of rare-earth metal dialkyl complexes in combi nation with DMAO(dry methylalumi no xane)is *** the presence of 60 equivalents of DMAO,the half-sandwich complex(C_(13)H_(8)CH_(2)Ph)Sc(CH_(2)SiMe_(3))_(2)(THF)(1)is inert for styrene polymerization,but(C_(5)Me_(4)Ph)Sc(CH_(2)C_(6)H_(4)NMe_(2)-o)_(2)(2)con verts 18% styre ne into syn diotactic *** the same conditi ons,the con strained-geometry configuration sandium complex(C13H8CH2Py)Sc(CH_(2)SiMe_(3))_(2)(3a)displays extremely high catalytic activity(>6420 kg·mol_(sc)^(-1)h^(-1))and perfect syndiospecific(rrrr>99%)for styrene polymerization,while its lutetium(3b)and yttrium(3c)analogues are nearly *** the binary catalytic system 3a/DMAO exhibits very low activity for 4-methoxystyrene polymerization,it is an efficient catalyst for the syndioselective polymerization of other styrene derivatives such as 2-methoxystyrene,4-methylthiostyrene,4-fluorostyrene,4-dimethylhydrosilylstyrene,alkyne-susbstituted styrenes and *** addition,the binary system 3a/DMAO can copolymerize ethylene and styrene to give alternating copolymers with a single glass tran sition at 80℃ and 0.4 MPa ethylene *** in creasing styrene feed amount from 20 mmol to 60 mmol,the styre ne con tent slight in creases from 48.2 mol% to 53.8 mol%,but the polymerizatio n activity is obviously promoted from 240 kg·mol_(Sc)^(-1)·h^(-1) to 532 kg·mol_(sc)^(-1)·h^(-1).

关键词： DMAO Syndiotactic polystyrene Styrene Ethylene Copolymerization

自动乳腺全容积成像和磁共振成像、钼靶影像学特征在三阴性乳腺癌的诊断及预后分析的价值

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临床放射学杂志 2025年第1期44卷 69-75页

作者：张琪茹赵辉韩华河南省新乡市中心医院超声科二 453000

目的探讨自动乳腺全容积成像(ABVS)和MRI、钼靶影像学特征对三阴性乳腺癌(TNBC)的诊断及预后的价值。方法搜集经病理检测与免疫组织化学检测证实为TNBC患者47例和非三阴性乳腺癌(nTNBC)患者43例。均行ABVS、MRI、钼靶检查,比较两组患者... 详细信息

目的探讨自动乳腺全容积成像(ABVS)和MRI、钼靶影像学特征对三阴性乳腺癌(TNBC)的诊断及预后的价值。方法搜集经病理检测与免疫组织化学检测证实为TNBC患者47例和非三阴性乳腺癌(nTNBC)患者43例。均行ABVS、MRI、钼靶检查,比较两组患者的临床资料、ABVS、MRI、钼靶影像学特征、不同检查方式对TNBC的诊断效能及预后不同TNBC患者的影像学特征。结果TNBC组患者年龄>35岁、肿瘤直径>2 cm、病理分期为Ⅲ期、淋巴结转移患者占比显著高于nTNBC组(P<0.05);TNBC与nTNBC患者的ABVS(肿块形态、边缘、钙化类型、后方回声衰减)、MRI(肿块大小、形态、边缘、内部强化、表观扩散系数、峰值强化率、峰值时间值)、钼靶检查(钙化情况)影像学特征差异均有统计学意义(P<0.05);ABVS、MRI联合钼靶检查诊断TNBC的特异度、敏感度、准确率、预测率均显著高于单一或任意两种检查方法(P<0.05);TNBC预后良好、预后不良患者钙化情况、汇聚征、后方回声衰减、内部强化、峰值强化率差异均有统计学意义(P<0.05)。结论ABVS、MRI联合钼靶影像学特征在TNBC诊断及预测预后中的应用价值较高。

关键词：三阴性乳腺癌自动乳腺全容积成像磁共振成像乳腺钼靶X线预后

Can insulating graphene oxide contribute the enhanced conductivity and durability of silver nanowire coating?

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Nano Research 2019年第7期12卷 1571-1577页

作者： Feng Duan Weiwei Li Guorui Wang Chuanxin Weng Hao Jin hui zhang zhong zhang CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China University of Chinese Academy of Sciences Beijing 100149China

As an essential component of flexible optoelectronic devices,transparent conductive films made of silver nanowire (AgNW) have attracted wide attention due to the extraordinary optical,electrical and mechanical ***,the application of AgNW coating still faces some challenges to be overcome including large contact resistance and poor ***,we induce insulating graphene oxide over silver nanowire network through solution process to modify the electrical property and provide a protective *** interaction with substrates reducing the contact resistance of AgNW junctions and extra conductive channels of graphene oxide sheets contributes to the dramatic enhancement in electric property as well as *** resulting coating exhibits superior and uniform optoelectronic performances (sheet resistance of ~ 38 Ω·sq^-1 with 91% transmittance at 550 nm),outstanding stability in harsh environments,strong adhesion,and excellent mechanical flexibility after 3,000 bending cycles at a bending radius of 2.0 mm,which imply the promising application prospects in flexible optoelectronics.

关键词： silver nanowires durability graphene oxide transparent electrodes flexible electr

关联视阈下的口译交际——以2014、2015年“两会”总理答记者问为例

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江西科技学院学报 2017年第3期12卷 90-93页

作者：刘美含尹中慧张静瑶苗林河北中医学院

关联理论和关联翻译理论视阈下，口译的本质对象是说话人的交际意图。交际者传递某一思想的目的就是让接受者明白他传递该思想的意图。意图是整个交际（包括会话交际、篇章交际及非言语交际）的始发机制，对交际策略、方法（语码或行为... 详细信息

关联理论和关联翻译理论视阈下，口译的本质对象是说话人的交际意图。交际者传递某一思想的目的就是让接受者明白他传递该思想的意图。意图是整个交际（包括会话交际、篇章交际及非言语交际）的始发机制，对交际策略、方法（语码或行为）和效果起着控制和预设作用。话语理解、预测和翻译方式方法的选择应围绕交际意图为核心。

关键词：关联理论关联翻译理论口译