检索结果-南通市图书馆

microcellular foamed polyamide 6/carbon nanotube composites withsuperior electromagnetic wave absorption

Journal of materials science & Technology 2022年第22期117卷 215-224页

作者： menglong Xu Linfeng Wei Li ma Jiawei Lu Tao Liu Ling Zhang Ling Zhao Chul b.Park state Key Laboratory of Chemical Engineering School of Chemical EngineeringEast China University of Science and TechnologyShanghai 200237China Department of mechanical and Industrial Engineering University of Toronto5 King’s College RoadTorontoOntario M5S 3G8Canada shanghai Engineering Research Center of Hierarchical Nanomaterials School of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China

Electromagnetic (Em) wave pollution causing damage to precision equipment and threatening thehealth of living organisms has attracted considerable attention. Herein, promising microcellular foamedpolyamide 6 (PA6)/carbon nanotube (CNT) composites for highly efficient Em wave absorption were successfully fabricated using supercritical CO_(2) foaming. Nanocomposites foams with a void fraction rangingfrom 38.7% to 85.1% were achieved, providing a platform to assess the correlation of the electrical conductivity, the dielectric permittivity and the Em wave absorption properties with porosity. Notably, theFoam-257.5C sample with a void fraction of 38.7% exhibited outstanding Em wave absorption characteristics at a thickness of only 1.59 mm and an ultra-low reflection loss value of -55.3 db (99.9997% wave absorption). most importantly, the effective absorption bandwidth (EAb) of the Foam-257.5C sample couldcover the entire Ku band (12.4–18 GHz) by slightly adjusting the thickness from 1.20 to 1.60 mm. Thesuperior Em wave absorption performance of the Foam-257.5C sample was attributed to multiple reflections and scattering at the solid-gas interfaces, favorable impedance matching due to the existence ofa large polymer-air interface area, conductive loss near the interfaces and interfacial polarization. Thus,this study offers an eco-friendly, simple and versatile methodology to develop high-efficiency, flexiblepolymer-based Em wave absorbents.

关键词： Polymer nanocomposites supercritical CO_(2)foaming Void fraction Dielectric properties Electromagnetic wave absorption

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

Research advances of magnesium and magnesium alloys worldwide in 2021

引用

Journal of magnesium and Alloys 2022年第4期10卷 863-898页

作者： Jiangfeng song Jing Chen Xiaoming Xiong Xiaodong Peng Daolun Chen Fusheng Pan National Engineering Research Center for magnesium Alloys Chongqing UniversityChongqing 400044China Department of mechanical and Industrial Engineering Ryerson UniversityTorontoOntario M5B 2K3Canada

more than 4000 papers in the field of mg and mg alloys were published and indexed in Web of science(Wos)Core Collection database in *** bibliometric analyses indicate that the microstructure,mechanical properties,and corrosion of mg alloys still are the main research *** ion batteries and hydrogen storage mg materials have attracted much *** contributions to the research and development of magnesium alloys were made by Chongqing University,shanghai Jiaotong University,and Chinese Academy of sciences in China,Helmholtz Zentrum Hereon in Germany,Ohio state University in the United states,the University of Queensland in Australia,Kumanto University in Japan,and seoul National University in Korea,University of Tehran in Iran,etc..This review is aimed to summarize the progress in the development of structural and functional mg and mg alloys in *** on the issues and challenges identified here,some future research directions are suggested.

关键词： magnesium alloys Cast magnesium alloys Wrought magnesium alloys bio-magnesium alloys mg based energy storage materials Processing technologies Corrosion and protection

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

sifting for small primes from an arithmetic progression

引用

science China mathematics 2023年第12期66卷 2715-2730页

作者： John b.Friedlander Henryk Iwaniec Department of mathematics University of TorontoTorontoON M5S 2E4Canada Department of mathematics Rutgers UniversityPiscatawayNJ 08903USA

In this work and its sister paper(Friedlander and Iwaniec(2023)),we give a new proof of the famous Linnik theorem bounding the least prime in an arithmetic *** sieve machinery in both papers,we are able to dispensh with the log-free zero density bounds and the repulsion property of exceptional zeros,two deep innovations begun by Linnik and relied on in earlier proofs.

关键词： sieve small primes Linnik theorem

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

Recent progress in bio-inspired macrostructure array materials with special wettability—from surface engineering to functional applications

引用

International Journal of Extreme manufacturing 2024年第1期6卷 208-256页

作者： Zhongxu Lian Jianhui Zhou Wanfei Ren Faze Chen Jinkai Xu Yanling Tian Huadong Yu school of mechanical and Aerospace Engineering Jilin UniversityChangchun 130022People’s Republic of China ministry of Education Key Laboratory for Cross-scale micro and Nano manufacturing Changchun University of Science and TechnologyChangchun 130022People’s Republic of China College of mechanical and Electrical Engineering Changchun University of Science and TechnologyChangchun 130022People’s Republic of China school of mechanical Engineering Tianjin UniversityTianjin 300350People’s Republic of China school of Engineering University of WarwickCoventry CV47ALUnited Kingdom

bio-inspired macrostructure array(mAA,size:submillimeter to millimeter scale)materials with special wettability(mAAms-sW)have attracted significant research attention due to their outstanding performance in many applications,including oil repellency,liquid/droplet manipulation,anti-icing,heat transfer,water collection,and oil–water *** this review,we focus on recent developments in the theory,design,fabrication,and application of bio-inspired *** first review the history of the basic theory of special wettability and discuss representative structures and corresponding functions of some biological surfaces,thus setting the stage for the design and fabrication of bio-inspired *** then summarize the fabrication methods of special wetting mAAs in terms of three categories:additive manufacturing,subtractive manufacturing,and formative manufacturing,as well as their diverse functional applications,providing insights into the development of these ***,the challenges and directions of future research on bio-inspired mAAms-sW are briefy *** efforts,progress,and breakthroughs from surface engineering to functional applications elaborated herein will promote the practical application of bio-inspired mAAms-sW.

关键词： macrostructure arrays superhydrophobic 3D printing laser droplet manipulation

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

spatial and temporal evolution of electromagnetic pulses from solid target irradiated with multi-hundred-terawatt laser pulse inside target chamber

引用

Plasma science and Technology 2024年第2期26卷 62-69页

作者：何强友邓志刚张智猛夏亚东张博孟令彪贺书凯黄华杨雷刘红杰范伟林晨周维民李廷帅颜学庆 state Key Laboratory of Nuclear Physics and Technology and Key Laboratory of HEDP of the Ministry of EducationCAPTPeking UniversityBeijing 100871People's Republic of China science and Technology on Plasma Physics Laboratory Research Center of Laser FusionChina Academy of Engineering PhysicsMianyang 621900People's Republic of China school of materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731People's Republic of China beijing Laser Acceleration Innovation Center Beijing 101400People's Republic of China

Giant electromagnetic pulses(EmPs) induced by high-power laser irradiating solid targets interfere with various experimental diagnoses and even damage equipment,so unveiling the evolution of EmPs inside the laser chamber is crucial for designing effective EmP *** this work,the transmission characteristics of EmPs as a function of distances from the target chamber center(TCC) are studied using b-dot *** mean EmP amplitude generated by picosecond laser-target interaction reaches 561 kV m^(-1),357 kV m^(-1),395 kV m^(-1),and 341 kV m^(-1)at 0.32 m,0.53 m,0.76 m,and 1 m from TCC,which decreases dramatically from 0.32 m to 0.53 ***,it shows a fluctuation from 0.53 m to 1 *** temporal features of EmPs indicate that time-domain EmP signals near the target chamber wall have a wider full width at half maximum compared to that close to TCC,mainly due to the echo oscillation of electromagnetic waves inside the target chamber based on simulation and *** conclusions of this study will provide a new approach to mitigate strong electromagnetic pulses by decreasing the echo oscillation of electromagnetic waves inside the target chamber during laser coupling with targets.

关键词： target electromagnetic pulses spatial distribution

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

Enhancing the Interaction of Carbon Nanotubes by metal-Organic Decomposition with Improved mechanical strength and Ultra-broadband EmI shielding Performance

引用

Nano-micro Letters 2024年第7期16卷 281-294页

作者： Yu-Ying shi si-Yuan Liao Qiao-Feng Wang Xin-Yun Xu Xiao-Yun Wang Xin-Yin Gu You-Gen Hu Peng-Li Zhu Rong sun Yan-Jun Wan shenzhen Institute of Advanced Electronic materials Shenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055People’s Republic of China southern University of science and Technology Shenzhen 518055People’s Republic of China National Key Laboratory of materials for Integrated Circuits Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050People’s Republic of China

The remarkable properties of carbon nanotubes(CNTs)have led to promising applications in the field of electromagnetic inter-ference(EmI)***,for macroscopic CNT assemblies,such as CNT film,achieving high electrical and mechanical properties remains challenging,which heavily depends on the tube-tube interac-tions of ***,we develop a novel strategy based on metal-organic decomposition(mOD)to fabricate a flexible silver-carbon nanotube(Ag-CNT)*** Ag particles are introduced in situ into the CNT film through annealing of mOD,leading to enhanced tube-tube *** a result,the electrical conductivity of Ag-CNT film is up to 6.82×10^(5) s m^(-1),and the EmI shielding effectiveness of Ag-CNT film with a thickness of~7.8μm exceeds 66 db in the ultra-broad frequency range(3-40 GHz).The tensile strength and Young’s modulus of Ag-CNT film increase from 30.09±3.14 to 76.06±6.20 mPa(~253%)and from 1.12±0.33 to 8.90±0.97 GPa(~795%),***,the Ag-CNT film exhibits excellent near-field shield-ing performance,which can effectively block wireless *** innovative approach provides an effective route to further apply macroscopic CNT assemblies to future portable and wearable electronic devices.

关键词： EmI shielding mechanical strength Carbon nanotubes metal-organic decomposition Flexibility

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

Which psychosocial factors are associated with return to sport following concussion? A systematic review

引用

Journal of sport and Health science 2022年第4期11卷 438-449页

作者： Jacqueline van Ierssel Kaleigh Ferdinand Pennock margaret sampson Roger Zemek Jeffrey G.Caron Children’s Hospital of Eastern Ontario Research Institute OttawaON K1H 8L1Canada Faculty of Kinesiology and Physical Education University of TorontoTorontoON M5S 2W6Canada Department of Pediatrics Faculty of MedicineUniversity of OttawaOttawaON K1H 8M5Canada Faculty of medicine University of MontrealMontrealQC H3T 1J4Canada Center for Interdisciplinary Research in Rehabilitation MontrealQC H3S 1M9Canada

background:Psycho social factors predict recurrent inj ury and return to preinjury level of performance following orthopedic injury but are poorly understood following *** management protocols prioritize physical measures of ***,the objective of this study was to describe the psychosocial factors associated with return to sport(RTs) and how they are measured in athletes who sustained a ***:mEDLINE,Embase,APA PsycINFO,CINAHL,and sPORTDiscus were searched through February 2,*** studies included original peer-reviewed publications describing psychosocial factors associated with RTs following a diagnosed *** primary outcome was scales or measures employed and/or key thematic ***:Of the 3615 studies identified,10 quantitative cohort studies(Oxford Centre for Evidence-based medicine Level-3) representing 2032 athletes(85% male;high-school and collegiate collision/contact athletes) and 4 qualitative studies representing 66 athletes(74% male;70% American football;aged 9-28 years) were *** identified 3 overarching themes and 10 outcome measures related to psychosocial factors associated with RTs following concussion:(a) fear(e.g,of recurrent concussion,of RTs,of losing playing status);(b) emotional factors(e.g,depression,anxiety,perceived stress,mental health,disturbance mood);and(c) contextual factors(e.g,social support,pressure,sense of identity).Conclusion:Although current medical clearance decisions prioritize physical measures of recovery,evidence suggests diverse psychosocial factors influence RTs following *** remains unclear which psychosocial factors contribute to a successful RTs,including the influence of sex/gender and *** studies should evaluate the association of psychological readiness with physical measures of recovery at medical clearance,preinjury level of performance,and risk of recurrent concussion to support RTs clinical decision-making.

关键词： Concussion Recovery Rehabilitation sport psychology sporting injuries

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

Diamond-Like Carbon Depositing on the surface of Polylactide membrane for Prevention of Adhesion Formation During Tendon Repair

引用

Nano-micro Letters 2024年第9期16卷 478-499页

作者： Yao Xiao Zaijin Tao Yufeng Ju Xiaolu Huang Xinshu Zhang Xiaonan Liu Pavel A.Volotovski Chao Huang Hongqi Chen Yaozhong Zhang shen Liu Department of Orthopaedics Shanghai Jiao Tong University School of Medicine Affiliated Sixth People’s Hospital600 Yishan RdShanghai 200233People’s Republic of China shanghai Tongji Hospital 389 Xincun RdShanghai 200065People’s Republic of China Key Laboratory for Thin Film and microfabrication of ministry of Education Research Institute of Micro/Nano Science and TechnologyShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China Orthopedic Trauma Department Belarus Republic Scientific and Practical Center for Traumatology and OrthopedicsKizhevatova str.60/4220024 MinskBelarus shanghai Haohai biological Technology Limited Liability Company 1386 Hongqiao RdShanghai 200336People’s Republic of China Department of General surgery Shanghai Jiao Tong University School of Medicine Affiliated Sixth People’s Hospital600 Yishan RdShanghai 200233People’s Republic of China shanghai Key Laboratory for High Temperature materials and Precision Forming School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240People’s Republic of China

Post-traumatic peritendinous adhesion presents a significant challenge in clinical *** study proposes the use of diamond-like carbon(DLC)deposited on polylactic acid(PLA)membranes as a biophysical mechanism for anti-adhesion barrier to encase ruptured tendons in tendon-injured *** results indicate that PLA/DLC composite membrane exhibits more efficient anti-adhesion effect than PLA membrane,with histological score decreasing from 3.12±0.27 to 2.20±0.22 and anti-adhesion effectiveness increasing from 21.61%to 44.72%.mechanistically,the abundant C=O bond functional groups on the surface of DLC can reduce reactive oxygen species level effectively;thus,the phosphorylation of NF-κb and m1 polarization of macrophages are ***,excessive inflammatory response augmented by m1 macrophage-originated cytokines including interleukin-6(IL-6),interleukin-1β(IL-1β),and tumor necrosis factor-α(TNF-α)is largely *** biocompatibility evaluation,PLA/DLC membrane is slowly absorbed within tissue and displays prolonged barrier effects compared to traditional PLA *** studies show the DLC depositing decelerates the release of degradation product lactic acid and its induction of macrophage m2 polarization by interfering esterase and PLA ester bonds,which further delays the fibrosis *** was found that the PLA/DLC membrane possess an efficient biophysical mechanism for treatment of peritendinous adhesion.

关键词： Diamond-like carbon Reactive oxygen species scavenging Foreign body reaction biodegradation Antioxidant Peritendinous adhesion

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

Epinephrine promotes tumor progression and m2 polarization of tumor-associated macrophages by regulating the TRIm2-NF-kb pathway in colorectal cancer cells

引用

Genes & Diseases 2024年第4期11卷 141-144页

作者： Zhengyi Liu Chenxing Jian Wenzheng Yuan Guiqing jia Donghui cheng Yanzhuo Liu Yanling Zhang bin Zhang Zili Zhou Gaoping Zhao Department of breast surgery Henan Provincial People's HospitalThe People's Hospital of Zhengzhou UniversityThe People's Hospital of Henan UniversityZhengzhouHenan 450003China microbiome Laboratory Henan Provincia People's Hospital Zhengzhou University People's HospitalZhengzhouHenan 450000China Department of Gastrointestinal surgery Union HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhanHubei 430022China Department of Gastrointestinal surgeryll Renmin Hospital of Wuhan UniversityWuhanHubei 430060China Department of Gastrointestinal surgery Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072China Department of Hepatobiliary surgery Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072China

Tumor-associated inflammation is an important component of the tumor microenvironment,and an important factor affecting tumor *** the tumor microenvironment,tumor-associated macrophages(TAms)receive different stimuli and can be polarized into classically activated m1 macrophages and alternatively activated m2 *** studies have indicated that the polarization of TAms is closely related to tumor progression.

关键词： nephrin tumor inflammation

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

Catalytic co-combustion of biomass and brown coal in a fluidized bed:Economic and environmental benefits

引用

Journal of Environmental sciences 2024年第6期140卷 24-36页

作者： Yury V.Dubinin Nikolay A.Yazykov Petr m.Yeletsky Roman b.Tabakaev Aleksandra I.belyanovskaya Vadim A.Yakovlev Federal Research Center boreskov Institute of Catalysis sb RAs Lavrentiev Ave.5Novosibirsk630090Russia University of Tyumen Volodarskogo str.6Tyumen625003Russia

The work is devoted to the study of combustion of brown coal,pine sawdust,and their mixtures in a fluidized bed of catalyst at 600-750℃.It is shown that an increase in the content of sawdust in a mixture with brown coal leads to an increase in the burnout degree of solid fuel from 94.4%to 99.9%,while the emission of greenhouse gases in the form of CO_(2)CO and NOxis reduced(CO_(2)from the biomass is not included in the balance).The high content of alkaline earth metal oxides(CaO and mgO)in the mineral part of brown coal,sawdust,and their mixtures eliminates the emission of sulfur oxides and the slagging of heat-exchange surfaces during the combustion in a fluidized bed of *** optimal temperature,when the highest burnout degree of the above fuels is achieved in the combustion is 750℃.It is also shown that the increase in temperature and the content of sawdust in the composition of the fuel mixtures has a positive effect on the economic and environmental process indicators.

关键词： Co-combustion Fluidized catalyst bed biomass Coal Economic effect Environmental impact

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

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：