检索结果-南通市图书馆

Journal of Computational Mathematics 2023年第3期41卷 458-481页

作者： Huijun Fan Yanmin Zhao Fenling Wang Yanhua Shi Fawang Liu School of science Xuchang UniversityXuchang 461000China School of Mathematics and Statistics Zhengzhou UniversityZhengzhou 450001China Henan Joint International Research Laboratory of High Performance Computation for Complex Systems Xuchang 461000China School of Mathematical sciences Queensland University of TechnologyBrisbane QLD 4001Australia School of Mathematics and Statistics Fuzhou UniversityFuzhou 350108China

By employing EQ^(ROT)_(1) nonconforming finite element,the numerical approximation is presented for multi-term time-fractional mixed sub-diffusion and diffusion-wave equation on anisotropic *** with the multi-term time-fractional sub-diffusion equation or diffusion-wave equation,the mixed case contains a special time-space coupled derivative,which leads to many difficulties in numerical ***,a fully discrete scheme is established by using nonconforming finite element method(FEM)in spatial direction and L1 approximation coupled with Crank-Nicolson(L1-CN)scheme in temporal ***,the fully discrete scheme is proved to be unconditional ***,convergence and superclose results are derived by using the properties of EQ^(ROT)_(1) nonconforming finite ***'s more,the global superconvergence is obtained via the interpolation postprocessing ***,several numerical results are provided to demonstrate the theoretical analysis on anisotropic meshes.

关键词： Multi-term time-fractional mixed sub-diffusion and diffusion-wave equation Nonconforming FEM L1-CN scheme Anisotropic meshes Convergence and superconvergence

Effect of Thermal Regeneration on the Breakthrough Performance of Ceramsite Saturated with Methylene Blue

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Harbin Institute of Technology(New Series) 2020年第5期27卷 87-96页

作者： Tianpeng Li Ting Li College of City and Architecture Engineering Zaozhuang UniversityZaozhuang 277160ShandongChina Zaozhuang Yuanheng Machinery Manufacturing Co. Ltd.Zaozhuang 277000ShandongChina

The regeneration of a spent packing is crucial with respect to the development of circular economy and abstemious ***,the effects of regeneration temperature,resistant time,heating rate,and regeneration cycle on the breakthrough performance of methylene blue(MB)dye⁃exhausted ceramsite in a two⁃stage fixed⁃bed column were studied in this *** illustrate that the ceramsite exhibited excellent potential regeneration properties under the following optimal regeneration conditions:treatment temperature was 600°C,resistant time was 15 min,heating rate was 20℃/min,regeneration cycle was over 9 cycles,and the breakthrough time,saturation time,regeneration efficiency(RE),and regeneration loss rate(RLR)were 540 min,1020 min,64.61%,and 17.73%,*** RE declined by 35.14%in over 1 cycle,while the RLR increased by 3.15 times in over 9 ***,Thomas model was suitable to describe the two⁃stage fixed⁃bed column adsorption and thermal regeneration process with R2=*** conclusion,a thorough understanding of the regeneration behavior of the two⁃stage fixed⁃bed column packed with ceramsite provides reference to obtain an effective and feasible regeneration approach,and it is beneficial for further application in water treatment.

关键词： ceramsite thermal regeneration two⁃stage fixed⁃bed column breakthrough performance Thomas model

Highly soluble organic nitrate additives for practical lithium metal batteries

在线全文

学校读者我要写书评

暂无评论

Carbon Energy 2023年第1期5卷 16-24页

作者： Zhe Wang Li-Peng Hou Zheng Li Jia-Lin Liang Ming-Yue Zhou Chen-Zi Zhao Xiaoyuan Zeng Bo-Quan Li Aibing Chen Xue-Qiang Zhang Peng Dong Yingjie Zhang Jia-Qi Huang Qiang Zhang Advanced Research Institute of Multidisciplinary science Beijing Institute of TechnologyBeijingPR China College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuangPR China School of Materials science and Engineering Beijing Institute of TechnologyBeijingPR China Beijing key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijingPR China National and Local Joint Engineering Laboratory for Lithium-Ion Batteries and Materials Preparation Technology Key Laboratory of Advanced Battery Materials of Yunnan ProvinceFaculty of Metallurgical and Energy EngineeringKunming University of Science and TechnologyKunmingPR China

The stability of lithium metal anodes essentially dictates the lifespan of high-energy-density lithium metal *** nitrate(LiNO_(3))is widely recognized as an effective additive to stabilize lithium metal anodes by forming LiN_(x)O_(y)-containing solid electrolyte interphase(SEI).However,its poor solubility in electrolytes,especially ester electrolytes,hinders its applications in lithium metal ***,an organic nitrate,isosorbide nitrate(ISDN),is proposed to replace LiNO_(3).ISDNhas a high solubility of 3.3M in ester electrolytes due to the introduction of organic segments in the *** decomposition of ISDN generates LiN_(x)O_(y)-rich SEI,enabling uniform lithium *** lifespan of lithium metal batteries with ISDN significantly increases from 80 to 155 cycles under demanding ***,a lithium metal pouch cell of 439Whkg^(−1) delivers 50 *** work opens a new avenue to develop additives by molecular modifications for practical lithium metal batteries.

关键词： electrolyte additives lithium metal anodes organic nitrate pouch cells solid electrolyte interphase

Research on Material and Morphological Structure of Venus Flytrap Trigger Hair

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2021年第5期18卷 1126-1136页

作者： Qian Wang Kun Xu Cheng Fan Lining Sun Lei Zhang Kejun Wang Jiangsu Provincial key Laboratory of Advanced Robotics Soochow UniversitySuzhou 215021China key Laboratory for Bionic Engineering(Ministry of Education) Jilin UniversityChangchun 130022China

Venus flytrap can sense the very small insects that touch its tactile receptors,known as trigger hairs,and thus capture prey to maintain its nutrient ***,there are few studies on the trigger hair and its morphological structure and material properties are not fully *** this study,the trigger hair is systematically characterized with the help of diff erent *** show that trigger hair is a special cantilever beam structure and it has a large longitudinal diameter ***,it is composed of a hair lever and a basal podium,and there is a notch near the hair *** crosssection of the trigger hair is approximately a honeycomb structure,which is composed of many *** to measure mechanical properties of trigger hair are introduced in this *** on the mechanical tests,trigger hair proved to be a variable stiff ness structure and shows a high sensitivity to the external *** features can provide supports for the understanding of the high-sensitivity sensing mechanism of trigger hairs from the perspective of structure and material,and off er inspirations for the development of high-performance tactile sensors.

关键词： Venus flytrap Morphological structure Mechanical properties Trigger hair Bioinspiration

Broadband Terahertz Transmission Modulation Based on Hybrid Graphene-Metal Metamaterial

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Electronic science and Technology 2018年第2期16卷 98-104页

作者： Lan-Ju Liang Zhang Zhang Xin Yan Xin Ding De-Quan Wei Qi-Li Yang Zhen-Hua Li Jian-Quan Yao College of Precision Instrument and Opto-Electronics Engineering Tianjin UniversityTianjin 300072 School of Opto-Electronic Engineering Zaozhuang UniversityZaozhuang 277160

A novel patterned metamaterial,composed of graphene layer and metal periodic array of split ring resonators （SRRs） and cross-shapedresonators （CSRs）, with broadband terahertz （THz） wave modulation was proposed and theoretically studied. It demonstrated that a broad passband high transmission of over 96.1% in the frequency range from 1.02 THz to 1.66 THz and two narrow band resonance frequencies f1 and f2 could be generated. The modulation depth of transmission was 29.2% when the graphene layer was covered on the metal metamaterial surface, and the modulation depth could be further increased by increasing the Fermi energy of graphene layer and reached approximately 79.5% at 1.0 eV in a broadband THz frequency range. The resonance frequencies of f1 and f2 were blue-shifted, and their modulation depths reached about 63.2% and 18%, respectively. These results show that the ultrathin graphene-metal metamaterial exhibits potential to achieve highperformance active THz devices and may offer widespread applications.

关键词： Graphene metamaterial modulator terahertz

Flavonoids from mulberry leaves inhibit fat production and improve fatty acid distribution in adipose tissue in finishing pigs

在线全文

学校读者我要写书评

暂无评论

Animal Nutrition 2024年第1期16卷 147-157页

作者： Yingying Liu Yinglin Peng Chen Chen Huibo Ren Ji Zhu Yuan Deng Qingming Cui Xionggui Hu Jianhua He Huali Li Xinghui Zhu Yulong Yin Jun He Yi Xiao College of Animal science and Technology Hunan Agricultural UniversityChangsha410128China Hunan Institute of Animal and Veterinary science Changsha410131China key Laboratory of Conservation and Genetic Analysis of Local Pig Breed Germplasm Resources Changsha410131China College of Information and Intelligence Hunan Agricultural UniversityChangsha410128China Institute of Subtropical Agriculture Chinese Academy of SciencesChangsha410125China

This study evaluated the effects of flavonoids from mulberry leaves(FML)on plasma biochemical indices,serum activities of lipid metabolism-related enzymes,fat morphology,fatty acid composition,and lipid metabolism in different adipose tissues of finishing *** used 120 Chinese hybrid barrows of Berkshire and Bama mini-pigs with an average initial body weight of 45.11±4.23 *** pigs were randomly assigned to five treatment groups and fed a control diet based on corn,soybean meal,and wheat bran or a control diet supplemented with 0.02%,0.04%,0.08%,or 0.16%*** experimental group had six replicates(pens),with four pigs per *** a 7-d adaptation period,the feeding trial was conducted for 58 *** and adipose tissue samples were collected from 30 pigs(one pig per pen)at the end of the *** results showed that FML supplementation significantly decreased the feed intake to body gain ratio,the plasma concentrations of total cholesterol and free fatty acids,and the serum activity of 3-hydroxy-3-methylglutaryl coenzyme A reductase(linear or quadratic effects,P<0.05),and decreased the plasma triglyceride concentration(quadratic,P=0.07).Increasing FML supplementation increased the average daily gain and serum activities of lipoprotein lipase(linear and quadratic effects,P<0.05)and adipose triglyceride lipase(linear,P<0.05).Dietary FML supplementation decreased the adipocyte area in the dorsal subcutaneous adipose(DSA)tissue of finishing pigs(linear,P=0.05)and increased the adipocyte area in the visceral adipose tissue(quadratic,P<0.01).Increasing FML supplementation decreased the C20:1 content in DSA,abdominal subcutaneous adipose,and visceral adipose tissues of finishing pigs(P<0.05)and increased the C18:3n3 and n-3 PUFA contents(P<0.05).The lipid metabolism genes were regulated by the PPARγ-LXRa-ABCA1 signaling pathway,and their expressions differed in different adipose *** findings suggest that FML improved growth performance,regulated lipid met

关键词： Finishing pig Mulberry leaf Flavonoid Lipid metabolism Fatty acid Lard

Advances and challenges in thermal runaway modeling of lithium-ion batteries

在线全文

学校读者我要写书评

暂无评论

The Innovation 2024年第4期5卷 172-186,171页

作者： Gongquan Wang Ping Ping Depeng Kong Rongqi Peng Xu He Yue Zhang Xinyi Dai Jennifer Wen Center for Offshore Engineering and Safety Technology China University of Petroleum(East China)Qingdao 266580China College of Chemical Engineering China University of Petroleum(East China)Qingdao 266580China Centre for Energy Resilience School of Mechanical Engineering SciencesUniversity of SurreyGuildfordSurrey GU27XHUK

The broader application of lithium-ion batteries(LIBs)is constrained by safety concerns arising from thermal runaway(TR).Accurate prediction of TR is essential to comprehend its underlying mechanisms,expedite battery design,and enhance safety protocols,thereby significantly promoting the safer use of *** complex,nonlinear nature of LIB systems presents substantial challenges in TR modeling,stemming from the need to address multiscale simulations,multiphysics coupling,and computing efficiency *** paper provides an extensive review and outlook on TR modeling technologies,focusing on recent advances,current challenges,and potential future *** begin with an overview of the evolutionary processes and underlying mechanisms of TR from multiscale perspectives,laying the foundation for TR *** a comprehensive understanding of TR phenomena and mechanisms,we introduce a multiphysics coupling model framework to encapsulate these *** this framework,we detail four fundamental physics modeling approaches:thermal,electrical,mechanical,and fluid dynamic models,highlighting the primary challenges in developing and integrating these *** address the intrinsic trade-off between computational accuracy and efficiency,we discuss several promising modeling strategies to accelerate TR simulations and explore the role of AI in advancing next-generation TR ***,we discuss challenges related to data availability,model scalability,and safety standards and regulations.

关键词： lithium thermal modeling

Dielectric nanocomposites with superb high-temperature capacitive performance based on high intrinsic dielectric constant polymer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2024年第9期17卷 8504-8512页

作者： Ding Ai Yuan Chang Haoliang Liu Chenglong Wu Yao Zhou Yuting Han Hao Yu Bing Xiao Yonghong Cheng Guanglei Wu Zirui Jia State key Laboratory of Electrical Insulation and Power Equipment School of Electrical EngineeringXi’an Jiaotong UniversityXi’an 710049China Institute of Materials for Energy and Environment State Key Laboratory of Bio-Fibers and Eco-TextilesCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China

Advancements in power electronics necessitate dielectric polymer films capable of operating at high temperatures and possessing high energy *** significant strides have been achieved by integrating inorganic fillers into high-temperature polymer matrices,the inherently low dielectric constants of these matrices have tempered the magnitude of *** this work,we report an innovative nanocomposite based on sulfonylated polyimide(SPI),distinguished by the incorporation of sulfonyl groups within the SPI backbone and the inclusion of wide bandgap hafnium dioxide(HfO_(2))*** nanocomposite has demonstrated notable enhancements in thermal stability,dielectric properties,and capacitive performance at elevated *** simulations at both molecular and mesoscopic levels have elucidated the mechanisms behind these improvements,which could be attributed to confined segmental motion,an optimized electronic band structure,and a diminished incidence of dielectric breakdown ascribed to the presence of sulfonyl ***,the SPI-HfO_(2)nanocomposite demonstrates a high charge-discharge efficiency of 95.7%at an elevated temperature of 150℃and an applied electric field of 200 MV/***,it achieves a maximum discharged energy density of 2.71 J/cm^(3),signalling its substantial potential for energy storage applications under extreme conditions.

关键词： dielectric polymer nanocomposites high-temperature high dielectric constant sulfonyl groups energy storage performance

MMLUP: Multi-Source & Multi-Task Learning for User Profiles in Social Network

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2019年第9期61卷 1105-1115页

作者： Dongjie Zhu Yuhua Wang Chuiju You Jinming Qiu Ning Cao Chenjing Gong Guohua Yang Helen Min Zhou School of Computer science and Technology Harbin Institute of TechnologyWeihai264209China College of Information Engineering Sanming University365004SanmingChina Fujian province University key Lab for Industry Big Data Analysis and Application FujianChina College of Information Engineering Qingdao Binhai UniversityQingdaoChina Jiangsu province Wireless Sensing System Application Engneering Technology Research and Development Centre China School of Engineering Manukau Institute of TechnologyAuckland2241New Zealand

With the rapid development of the mobile Internet,users generate massive data in different forms in social network every day,and different characteristics of users are reflected by these social media *** to integrate multiple heterogeneous information and establish user profiles from multiple perspectives plays an important role in providing personalized services,marketing,and recommendation *** this paper,we propose Multi-source&Multi-task Learning for User Profiles in Social Network which integrates multiple social data sources and contains a multi-task learning framework to simultaneously predict various attributes of a ***,we design their own feature extraction models for multiple heterogeneous data ***,we design a shared layer to fuse multiple heterogeneous data sources as general shared representation for multi-task ***,we design each task’s own unique presentation layer for discriminant output of ***,we design a weighted loss function to improve the learning efficiency and prediction accuracy of each *** experimental results on more than 5000 Sina Weibo users demonstrate that our approach outperforms state-of-the-art baselines for inferring gender,age and region of social media users.

关键词： User profiles multi-source multi-task learning social network

Deformation Mechanism of Bimodal Structured 2205 Duplex Stainless Steel in Two Yield Stages

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials science) 2023年第1期38卷 184-191页

作者：盛捷 DU Mingchen LI Yufeng MA Guocai CHEN Weiqian ZHENG Yuehong ZHAN Faqi REN Junqiang G I Raab 喇培清 State key Laboratory of Gansu Advanced Non-Ferrous Metal Materials Lanzhou University of TechnologyLanzhou 730050China Jiuquan Iron and Steel(Group)Co. Ltd.Jiayuguan 735100China key Laboratory of Solar Power System Engineering Jiuquan Vocational and Technical CollegeJiuquan 735000China Institute of Physics of Advanced Materials Ufa State Aviation Technical University12 K.Marx StreetUfa 450008Russia

A kind of micro/nanostructured 2205 duplex stainless steel(DSS)with uniform distribution of nanocrystals was prepared via aluminothermic reaction *** analysis of stress-strain curve showed that the fracture strength and elongation of the specimen were 946 MPa and 24.7%,*** present,the research on microstructure of bimodal 2205 DSS at room temperature(RT)mainly depended on scanning electron microscope(SEM)observation after loading *** test result indicates that there are two different yield stages in stress-strain curve of specimen during tensile *** microstructure of duplex bimodal structured stainless steel consists of two pairs of soft hard regions and *** studying deformation mechanism of bimodal structured stainless steel,the interaction between soft phase and hard phase are *** principle of composition design and microstructure control of typical duplex stainless steel is obtained,which provides an important research basis for designing of advanced duplex stainless steel.

关键词： 2205 duplex stainless steel bimodal structure in-situ tensile test deformation mechanism two different yield stages