检索结果-南通市图书馆

International Journal of Smart and Nano Materials 2024年第2期15卷 312-329页

作者： Yuliang Xia Tong Mu yanju Liu Jinsong Leng Centre for Composite Materials and Structures Harbin Institute of Technology(HIT)HarbinPeople's Republic of China Department of Astronautical Science and Mechanics Harbin Institute of Technology(HIT)HarbinPeople's Republic of China

Liquid Crystal Elastomers(LCEs)are renowned for their reversible deformation ***,enhancing their mechanical strength while retaining such flexibility has posed a considerable *** overcome this,we utilized 4D printing to develop an innovative composite of LCE with carbon fiber fabric(LCEC).This approach has notably increased the tensile strength of LCE by eightfold,all the while maintaining its exceptional capacity for reversible *** adjusting the alignment angle between carbon fiber and the LCE printing direction from 0°to 90°,the LCEC demonstrates an array of new deformation patterns,including bending,twisting,wrapping,and S-shaped transformations,which are distinct from pure LCE *** study unveils that LCE composites exhibit deformation processes markedly different from their pure material counterparts,with the ability of pure LCE to sustain tensile strains exceeding 1900%.These findings,previously undocumented and unexplored,represent a substantial contribution to the field of smart *** finite element analysis,we explored the carbon fiber and LcE matrix dynamics,revealing bending mechanics in *** combined experimental and simulation approach yields crucial insights for crafting durable,high-strength LCECs with diverse deformational properties,advancing smart material technology.

关键词： Liquid crystal elastomer composites 4D printing Smart materials

Shape Memory Polymer Composites:4D Printing,Smart Structures,and Applications

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 2024年第3期2023卷 319-343页

作者： Shiyu Yan Fenghua Zhang Lan Luo Linlin Wang yanju Liu Jinsong Leng Centre for Composite Materials and Structures Harbin Institute of Technology(HIT)No.2 Yikuang StreetHarbin 150000People's Republic of China Department of Astronautic Science and Mechanics Harbin Institute of Technology(HIT)No.92 West Dazhi StreetHarbin 150000People's Republic of China.

Shape memory polymers (SMPs) and their composites (SMPCs) are smart materials that can be stably deformed and then return to their original shape under external stimulation, thus having a memory of their shape. Three-dimensional (3D) printing is an advanced technology for fabricating products using a digital software tool. Four-dimensional (4D) printing is a new generation of additive manufacturing technology that combines shape memory materials and 3D printing technology. Currently, 4D-printed SMPs and SMPCs are gaining considerable research attention and are finding use in various fields, including biomedical science. This review introduces SMPs, SMPCs, and 4D printing technologies, highlighting several special 4D-printed structures. It summarizes the recent research progress of 4D-printed SMPs and SMPCs in various fields, with particular emphasis on biomedical applications. Additionally, it presents an overview of the challenges and development prospects of 4D-printed SMPs and SMPCs and provides a preliminary discussion and useful reference for the research and application of 4D-printed SMPs and SMPCs.

关键词： composites printing Smart

Theoretical Analysis of the Buckling Behaviors of Inhomogeneous Shape Memory Polymer Composite Laminates Considering Prestrains

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Solida Sinica 2024年第2期37卷 271-284页

作者： Hanxing Zhao Pengyu Cao Fengfeng Li Xin Lan Liwu Liu yanju Liu Jinsong Leng Centre of Composite Materials and Structures Harbin Institute of Technology(HIT)Harbin150080China Department of Astronautical Science and Mechanics Harbin Institute of Technology(HIT)Harbin150001China

The mismatch in thermal expansion coefficients between the fiber-rich and resin-rich regions of a shape memory polymer composite(SMPC)laminate,along with the residual strain during SMPC fabrication,results in buckling deformation of the inhomogeneous *** paper presents a macroscopic model for buckling of an inhomogeneous SMPC laminate under initial biaxial *** linear and nonlinear buckling analyses are carried out using the energy *** influences of prestrain biaxiality,temperature,and ply angle on the buckling wavelength,critical buckling prestrain,and buckling amplitude are *** results demonstrate that the critical buckling wavelength of the SMPC laminate is independent of the prestrain,while the amplitude is almost independent of *** addition,the optimal fiber stacking configuration with the maximum critical buckling prestrains of inhomogeneous SMPC laminates is determined by a genetic algorithm.

关键词： Shape memory polymer composite Buckling behavior Inhomogeneous laminate Biaxial prestrains

Icephobic materials and strategies:From bio-inspirations to smart systems

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Droplet 2024年第3期3卷 1-26页

作者： Xinlin Li Yan Liu Zhichun Zhang yanju Liu Jinsong Leng Centre for Composite Materials and Structures School of AstronauticsHarbin Institute of TechnologyHarbinChina Key Laboratory of Bionic Engineering(Ministry of Education) College of Biological and Agricultural EngineeringJilin UniversityChangchunChina Institute of Structured and Architected Materials Liaoning Academy of MaterialsShenyangChina Department of Astronautical Science and Mechanics Harbin Institute of TechnologyHarbinChina

Unwanted ice formations may cause severe functional degradations of facilities and also have a negative impact on their *** and removing ice accumula-tion is always a hot topic in the industrial and technological *** functional surfaces have been greatly studied for several decades and have proved to be excel-lent candidates for passive anti-/deicing ***,the drawbacks limit their potential industrial uses under harsh conditions,like low temperatures and high *** researches on bionic surfaces are focused on a certain function of nat-ural creatures and their underlined fundamental theories are revealed by taking the interface as the ***,living organisms,either plants or animals,are often sensitive and responsive to their surroundings,avoiding risks and even self-repairing upon *** this prospect,a novel view of the bionic icephobic materials has been proposed in the present review,which is expected to be studied and designed by taking the biological species as a *** two representative icephobic mate-rials,the anti-/deicing theories of superhydrophobic and slippery surfaces are first ***,the recent progress of smart icephobic strategies is summarized from interfaces to *** aim to provide new bionic insights on designing future icephobic strategies.

关键词： removing smart summarized

Apolipoprotein E4 interferes with lipid metabolism to exacerbate depression-like behaviors in 5xFAD mice

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Animal Models and Experimental Medicine 2024年第3期7卷 347-361页

作者： yanju Gong Mingfeng Li Min Liu Xinghan Wu Yanhong Li Chuan Qin Ling Zhang iNHC Key Laboratory of Human Disease Comparative Medicine Beijing Engineering Research Center for Experimental Animal Models of Human Critical DiseasesInternational Center for Technology and lnnovation of Animal ModelComparative Medicine CenterInstitute of Laboratory Animal SciencesChinese Academy of Medical Sciences(CAMS)and Peking Union Medical College(PuMC)BeijingChina Changping National Laboratory(CPNL) BeijingChina

Background:Apolipoprotein E4(ApoE4)allele is the strongest genetic risk factor for late-onset Alzheimer's disease,and it can aggravate depressive symptoms in non-AD ***,the impact of ApoE4 on AD-associated depression-l ike behaviors and its underlying pathogenic mechanisms remain ***:This study developed a 5xFAD mouse model overexpressing human ApoE4(E4FAD).Behavioral assessments and synaptic function tests were conducted to explore the effects of ApoE4 on cognition and depression in 5xFAD *** in peripheral and central lipid metabolism,as well as the levels of serotonin(5-HT)andγ-aminobutyric acid(GABA)neurotransmitters in the prefrontal cortex,were *** addition,the protein levels of 2.-dehydrocholesterol reductase/glycogen synthase kinase-3 beta/mammalian target of rapamycin(DHCR2./GSK3β/m TOR)and postsynaptic density protein 95/calmodulin-dependent protein kinase II/brain-derived neurotrophic factor(PSD95/CaMK-II/BDNF)were measured to investigate the molecular mechanism underlying the effects of ApoE4 on AD ***:Compared with 5xFAD mice,E4FAD mice exhibited more severe depressionlike behaviors and cognitive *** mice also exhibited increased amyloid-beta deposition in the hippocampus,increased astrocyte numbers,and decreased expression of depression-related neurotransmitters 5-HT and GABA in the prefrontal ***,lipid metabolism disorders were observed in E4FAD,manifesting as elevated low-density lipoprotein cholesterol and reduced high-density lipoprotein cholesterol in peripheral blood,decreased cholesterol level in the prefrontal cortex,and reduced expression of key enzymes and proteins related to cholesterol synthesis and *** expression of proteins related to the DHCR2./GSK3β/m TOR and PSD95/CaMK-II/BDNF pathways was also ***:This study found that ApoE4 overexpression exacerbates depressionlike behaviors in 5xFAD mice and confirmed that ApoE4 reduces co

关键词： 5xFAD mice Alzheimer's disease ApoE4 allele depression like

维普期刊数据库

Different processing methods and pharmacological effects of Atractylodis Rhizoma

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Natural Medicines 2024年第8期22卷 756-768页

作者： GUO Dongmei XU Kang WAN Qianyun YU Songyang MA Chaoyang ZHANG Baohui LIU yanju QU Linghang College of Pharmacy Hubei University of Chinese MedicineWuhan 430065China Center for Hubei TCM Processing Technology Engineering Wuhan 430065China Hubei Shizhen Laboratory Wuhan 430065China

Atractylodis Rhizoma,a traditional Chinese medicine with an extensive history of treating gastrointestinal disorders and other diseases,undergoes various processing methods in China to enhance its therapeutic efficacy for specific ***,a comprehensive report detailing the changes in chemical composition and pharmacological effects due to these processing methods is currently *** article provides a systematic review of the commonly employed processing techniques for Atractylodis Rhizoma,including raw Atractylodis Rhizoma(SCZ),bran-fried Atractylodis Rhizoma(FCZ),deep-fried Atractylodis Rhizoma(JCZ),and rice water-processed Atractylodis Rhizoma(MCZ).It examines the alterations in chemical constituents and pharmacological activities resulting from these processes and elucidates the mechanisms of action of the primary components in the various processed forms of Atractylodis Rhizoma in the treatment of gastrointestinal diseases.

关键词： Atractylodis Rhizoma Processing method Pharmacological effect Change in chemical composition Gastrointestinal disease

维普期刊数据库

在线全文

学校读者我要写书评

暂无评论

多措并举标本兼治有力有效做好基督教工作

中国宗教 2024年第5期 33-34页

作者： 1.中共山东省委统战部 2.山东省民宗委中共山东省委统战部山东省民宗委

近年来,山东省结合实际,采取有力举措,扎实做好基督教工作,有效推进基督教中国化山东实践,全省基督教领域呈现出和谐稳定的良好局面。一、严格落实宗教工作责任制,着力构建齐抓共管的宗教事务管理格局山东严格落实各级各部门宗教工作责... 详细信息

近年来,山东省结合实际,采取有力举措,扎实做好基督教工作,有效推进基督教中国化山东实践,全省基督教领域呈现出和谐稳定的良好局面。一、严格落实宗教工作责任制,着力构建齐抓共管的宗教事务管理格局山东严格落实各级各部门宗教工作责任制,通过强化组织保障“小切口”,推动基层宗教事务管理“大文章”。一是压实主体责任。将宗教工作纳入各级党委重要议事日程,构建起各级党委齐抓共管的工作体制。

关键词：基督教中国化齐抓共管宗教事务管理主体责任工作责任制和谐稳定严格落实标本兼治

维普期刊数据库

永恒的丰碑：“大陈岛垦荒红色档案”建设侧记

在线全文

学校读者我要写书评

暂无评论

浙江档案 2024年第5期 10-11+16页

作者： 1.台州市档案馆 2.台州市椒江区档案馆台州市档案馆台州市椒江区档案馆

在台州市椒江区档案馆的特藏馆内，挂着一幅由团中央在1956年赠给温州青年志愿垦荒队的旗帜“建设伟大祖国的大陈岛”，这面旗帜承载着一件件珍贵的档案史料和一个个生动的历史场景，大陈岛激情燃烧的垦荒史、波澜壮阔的发展史，宛如画...

在台州市椒江区档案馆的特藏馆内，挂着一幅由团中央在1956年赠给温州青年志愿垦荒队的旗帜“建设伟大祖国的大陈岛”，这面旗帜承载着一件件珍贵的档案史料和一个个生动的历史场景，大陈岛激情燃烧的垦荒史、波澜壮阔的发展史，宛如画卷般展现在眼前。“大陈岛垦荒精神”是台州的城市精神，是这座城市发展生生不息的力量源泉。1956年到1960年，温州、台州两地467名青年陆续上岛支援建设，他们卷起裤管，咬紧牙关，用血和汗锻炼成了一个个生产能手，在荒岛上发展出种植业、畜牧业和海洋养殖业。一代垦荒人用青春和汗水孕育了“艰苦创业、奋发图强、无私奉献、开拓创新”

关键词：

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

要闻

上海国资 2024年第4期 9-10页

作者： 1.新华社 2.国家数据局新华社国家数据局

国务院国资委全面深化改革领导小组召开2.2.年第一次全体会议2.2.年3月2.日，国务院国资委全面深化改革领导小组召开2.2.年第一次全体会议。会议指出，今年是深入实施国有企业改革深化提升行动承上启下的关键一年，要聚焦重点难点任务...

国务院国资委全面深化改革领导小组召开2.2.年第一次全体会议2.2.年3月2.日，国务院国资委全面深化改革领导小组召开2.2.年第一次全体会议。会议指出，今年是深入实施国有企业改革深化提升行动承上启下的关键一年，要聚焦重点难点任务全力攻坚，紧盯重点任务和关键时点，全力以赴抓好各项任务落实。

关键词：

来源：博看期刊

在线全文

学校读者我要写书评

暂无评论

中国免签的“朋友圈”持续扩容

重庆与世界 2024年第6期 38-43页

作者： 1.中国领事服务网 2.新华网中国领事服务网新华网

今年以来，中国与巴勒斯坦、新加坡、泰国、安提瓜和巴布达等国签署的互免签证协定相继生效，中国对外单方面免签和互免签证的力度越来越大。外交部发言人表示，中国免签的“朋友圈”持续扩容，与越来越多国家正式迈入“免签时代”，其...

今年以来，中国与巴勒斯坦、新加坡、泰国、安提瓜和巴布达等国签署的互免签证协定相继生效，中国对外单方面免签和互免签证的力度越来越大。外交部发言人表示，中国免签的“朋友圈”持续扩容，与越来越多国家正式迈入“免签时代”，其积极效应正在不断显现。截至5月10日，中国已与157个国家缔结涵盖不同护照的互免签证协定；与44个国家达成简化签证手续协定或安排；与2.个国家实现全面互免签证；还有60多个国家和地区给予中国公民免签或落地签证便利。

关键词：