检索结果-南通市图书馆

Microstructural Evolutions and Mechanical Properties of Energetic Al_(1) (TiZrNbTaMoCr)_(15) High-Entropy Alloys

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 Metallurgica Sinica(English Letters) 2024年第4期37卷 620-632页

作者： Xuan-Hong Cai Zhen-Hua Wang ben Niu jin-Feng Li Qing Wang Show authors Key Laboratory of Materials Modification By Laser Ion and Electron Beams(Ministry of Education)Engineering Research Center of High Entropy Alloy Materials(Liaoning Province)School of Materials Science and EngineeringDalian University of TechnologyDalian116024China Institute of Materials China Academy of Engineering PhysicsMianyang621908China

The present study focuses on investigating the microstructural evolutions and mechanical properties of energetic Al_(1)(TiZrNbTaMoCr)_(15) refractory high-entropy alloys with the different heat trea.ments at low Al content state. It is found that even with a reduction in the Al content, the strength of these alloys remains unaffected at room temperature and high temperature, while the plasticity improves significantly. In particular, the coherent BCC/B_(2) microstructure with needle-like B_(2) nanoprecipitates dispersed into the BCC matrix is formed in 873 K-aged Al_(1)Ti_(6)Zr_(2)Nb_(3)Ta_(3)Mo_(0.5)Cr_(0.5) alloy. Therefore, this alloy exhibits the highest compression yield strength (σ_(YS) = 1333 and 717 MPa) at room temperature and 1073 K, respectively. After 973 K-aged, the coherent BCC/B_(2) microstructure underwent destabilization, and the B_(2) phase transforms into the brittle Zr5Al3 phase which then coarsens and dominates the microstructure of S3-AlTa_(3) alloy after 1073 K-aged. Moreover, these current alloys exhibit exceptionally high theoretical exothermic enthalpy (ΔH), surpassing 11606 j·g^(−1), which highlights their significant potential as innovative high-performance energetic structural materials.

关键词： Refractory high-entropy alloy Coherent microstructure Mechanical property Exothermic enthalpy

MXene Enhanced 3D Needled Waste Denim Felt for High‑Performance Flexible Supercapacitors

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-Micro Letters 2024年第2期16卷 383-394页

作者： Wei Fan Qi Wang Kai Rong Yang Shi Wanxi Peng Handong Li Zhanhu Guo ben Bin Xu Hua Hou Hassan Algadi Shengbo Ge Key Laboratory of Functional Textile Material and Product of the Ministry of Education School of Textile Science and EngineeringInstitute of Flexible electronics and Intelligent TextileXi’an Polytechnic UniversityXi’an 710048People’s Republic of China Co‑Innovation Center of Efficient Processing and Utilization of Forest Resources College of Materials Science and EngineeringNanjing Forestry UniversityNanjing 210037People’s Republic of China Henan Province International Collaboration Lab of Forest Resources Utilization School of ForestryHenan Agricultural UniversityZhengzhou 450002People’s Republic of China Integrated Composites Lab Department of Mechanical and Construction EngineeringNorthumbria UniversityNewcastle Upon Tyne NE18STUK College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024People’s Republic of China Department of Electrical Engineering Faculty of EngineeringNajran University11001 NajranSaudi Arabia

MXene,a transition metal carbide/nitride,has been prominent as an ideal electrochemical active material for ***,the low MXene load limits its practical *** environmental concerns and sustainable development become more widely recognized,it is necessary to explore a greener and cleaner technology to recycle textile by-products such as *** present study proposes an effective 3D fabrication method that uses MXene to fabricate waste denim felt into ultralight and flexible supercapacitors through needling and *** 3D structure provided more sites for loading MXene onto Z-directional fiber bundles,resulting in more efficient ion exchange between the electrolyte and ***,the carbonization process removed the specific adverse groups in MXenes,further improving the specific capacitance,energy density,power density and electrical conductivity of *** electrodes achieve a maximum specific capacitance of 1748.5 mF cm-2 and demonstrate remarkable cycling stability maintaining more than 94%after 15,000 galvanostatic charge/discharge ***,the obtained supercapacitors present a maximum specific capacitance of 577.5 mF cm^(-2),energy density of 80.2μWh cm^(-2)and power density of 3 mW cm^(-2),*** resulting supercapacitors can be used to develop smart wearable power devices such as smartwatches,laying the foundation for a novel strategy of utilizing waste cotton in a high-quality manner.

关键词： MXene 3D needled waste denim felt Supercapacitors Carbonization

Dark Matter Search in Dwarf Irregular Galaxies with Ten Years of Data from the Ice Cube Neutrino Observatory

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrophysics 2024年第3期24卷 75-82页

作者： Yi-Fei Lü ben-Yang Zhu Rong-Lan Li Xue-Kang Guo Tian-Ci Liu Yong-Bo Huang Yun-Feng Liang Guangxi Key Laboratory for Relativistic AstrophysicsSchool of Physical Science and TechnologyGuangxi University Nanning 530004China

Dwarf irregular galaxies(dIrrs),as rotationally supported systems,have more reliable j-factor measurements than dwarf spheroidal galaxies and have received attention as targets for dark matter detection in recent *** this paper,we use 10 yr of IceCube muon-track data and an unbinned maximum-likelihood-ratio method to search for neutrino signals beyond the background from the directions of seven dIrrs,aiming to detect neutrinos produced by heavy annihilation dark *** do not detect any significant *** on such null results,we calculate the upper limits on the velocity-averaged annihilation cross section for 1 TeV–10 PeV dark *** limits,although weaker than the strictest constraints in the literature in this mass range,are also a good complement to the existing results considering the more reliable j-factor measurements of dIrrs.

关键词： (cosmology) dark matter-cosmology theory-galaxies dwarf

Experimental design of paraffin/methylated melamine-formaldehyde microencapsulated composite phase change material and the application in battery thermal management system

在线全文

学校读者我要写书评

暂无评论

journal of Materials Science & Technology 2024年第2期169卷 124-136页

作者： Que Huang Silong Wang jichun He Dengji Xu Safaa NAbdou Mohamed MIbrahim Shiqi Sun Yanjun Chen Handong Li ben Bin Xu Changcheng Liu Zeinhom M.El-Bahy Zhanhu Guo School of Environment and Safety Engineering North University of ChinaTaiyuan 030051China Institute of Advanced Energy Materials and Systems North University of ChinaTaiyuan 030051China School of Resources and Safety Engineering Central South UniversityChangsha 410010China School of Medical and BioInformation Engineering Northeastern UniversityShenyang 110819China Department of Chemistry Khurmah University CollegeTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Department of Chemistry College of ScienceTaif UniversityP.O.Box 11099Taif 21944Saudi Arabia Mechanical and Construction Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle Upon Tyne NE18STUK College of Materials Science and Engineering Taiyuan University of Science and TechnologyTaiyuan 030024China Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt

In order to maintain the optimal operating temperature of the battery surface and meet the demand for thermal storage technology,battery thermal management system based on phase change materials has attracted increasing *** this work,a kind of core-shell structured microcapsule was synthesized by an in-situ polymerization,where paraffin was used as the core,while methanol was applied to mod-ify the melamine-formaldehyde shell to reduce toxicity and improve thermal ***,three different types of heat conductive fillers with the same content of 10 wt.%,i.e.,nano-Al_(2)O_(3),nano-ZnO and carbon nanotubes were added,generating *** microcapsules were uniform,and were not affected by the thermal fillers,which were evenly dispersed *** composite sample with carbon nanotubes(10 wt.%)showed the highest thermal conductivity of 0.50 W/(m K)and latent heat of 139.64 j/***,according to the leakage testing and battery charge/discharge experiments,compared with Al_(2)O_(3)and ZnO,the addition of carbon nanotubes remarkably enhances the heat storage ability as latent heat from 126.98 j/g for the prepared sample with Al_(2)O_(3)and 125.86 j/g for the one with ZnO,then to 139.64 j/g,as well as dissipation performance as a cooling effect by decreasing the sur-face temperature of battery from 2%to 12%of microcapsule,composite sample with carbon nanotubes presents a broad application prospect in battery thermal management system and energy storage field.

关键词： Microcapsule Phase change material Battery Carbon nanotube Safety

Fjord-Type AIEgens Based on Inherent Through-Space Conjugation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CCS Chemistry 2024年第7期6卷 1739-1747页

作者： Ye-Qiang Han Yuan Xie jianyu Zhang Shiyu Tan Haoke Zhang ben Zhong Tang jonathan L.Sessler Feihe Huang Stoddart Institute of Molecular Science Department of ChemistryZhejiang UniversityHangzhou 310058 Zhejiang-Israel joint Laboratory of Self-Assembling Functional Materials ZJU-Hangzhou Global Scientific and Technological Innovation CenterZhejiang UniversityHangzhou 311215 MOE Key Laboratory of Macromolecular Synthesis and Functionalization Department of Polymer Science and EngineeringZhejiang UniversityHangzhou 310058 Center for AIE Research College of Materials Science and EngineeringShenzhen UniversityShenzhen 518061 Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionThe Hong Kong University of Science and TechnologyKowloonHong Kong 999077 School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen(CUHK-Shenzhen)Guangzhou 518172 Department of Chemistry The University of Texas at AustinAustinTexas 78712-1224 Green Catalysis Center and College of Chemistry Zhengzhou UniversityZhengzhou 450001

Through-space conjugation(TSC)is a noncovalently electronic interaction that is emerging as a potential complement to through-bond conjugation(TBC)-based strategies for constructing luminescent ***,the design of efficient luminogens based on TSC is currently challenging due to a lack of established structure-property *** is particularly true in the case of luminogens displaying aggregation-induced emission(AIE)*** this work,three terphenyl derivatives were prepared,and their photophysical properties were systemically *** was found that relative to the corresponding m-and p-linked analogues,the electronic interaction of TBC is weakened while the strength of TSC is commensurately enhanced in the constitutional isomer containing an o-linked fjordtype *** this set of luminogens,the presence of a fjord-type arrangement promotes a transformation from aggregation-caused quenching to *** investigations involving congeneric quaterphenyl and pentphenyl isomers support the universality of the fjord-type unit as a framework for synthesizing AIE-active luminogens(AIEgens)with inherent *** work not only provides a novel set of AIEgens but also establishes the utility of TSC in controlling the photophysical properties of nonconventional and twisted luminogens.

关键词： fjord-type through-space conjugation through-bond conjugation aggregation-induced emission luminescence twisted conformation

振动疗法联合悬吊训练前交叉韧带重建后患者运动及膝关节功能的变化

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

中国组织工程研究 2025年第11期29卷 2225-2230页

作者：陈文汉门杰杨伟赵小宇山西医科大学汾阳学院山西省吕梁市032200

背景:物理疗法对前交叉韧带重建术后恢复至关重要。近年来,许多医师都在优化前交叉韧带重建术后的物理康复方案,但仍然缺乏高效的前交叉韧带重建术后康复训练疗法。目的:探讨振动疗法联合悬吊训练对前交叉韧带重建患者术后运动及膝关节... 详细信息

背景:物理疗法对前交叉韧带重建术后恢复至关重要。近年来,许多医师都在优化前交叉韧带重建术后的物理康复方案,但仍然缺乏高效的前交叉韧带重建术后康复训练疗法。目的:探讨振动疗法联合悬吊训练对前交叉韧带重建患者术后运动及膝关节功能的影响。方法:纳入在上海体育大学附属体育医院就诊的80例首次行单侧前交叉韧带重建患者,按照随机数字表法将患者随机分为振动疗法组和振动疗法+悬吊训练组,每组40例。振动疗法组患者在前交叉韧带重建术后第13周开始进行振动疗法训练(每次10 min,1次/d,每周6次),振动疗法+悬吊训练组患者在前交叉韧带重建术后第13周开始进行振动疗法(每次10 min,1次/d,每周6次)联合悬吊训练(每周2次),共训练8周。训练前及训练8后,采用膝关节Lysholm评分评价膝关节功能,采用等速肌力评估训练系统评估屈膝对称性指数,采用平衡测试系统评估双侧多轴平均轨迹误差差值。结果与结论:(1)与训练前比较,两组患者训练8周后的膝关节Lysholm评分、屈膝与伸膝对称性指数均升高(P<0.05),双侧多轴平均轨迹误差差值降低(P<0.05);与振动疗法组比较,振动疗法+悬吊训练组患者膝关节Lysholm评分、屈膝与伸膝对称性指数均升高(P<0.05),双侧多轴平均轨迹误差差值降低(P<0.05);(2)结果表明,与单独进行振动疗法相比,振动疗法联合悬吊训练可显著改善前交叉韧带重建患者的膝关节功能,增加肌肉力量和对称性,提高平衡稳定性。

关键词：前交叉韧带重建振动疗法悬吊训练膝关节功能肌肉力量对称性平衡稳定性

同方期刊数据库

马华文人的本土化书写(1927-1941):乡土、身份与认同

在线全文

学校读者我要写书评

暂无评论

华文文学 2024年第2期 41-51页

作者：肖奔暨南大学国际关系学院暨南大学华侨华人研究院

马华文人的本土化书写过程,可以说是一个乡土再定位和身份再找寻的过程。从20世纪20年代末至40年代初,马华文人从自发的本土情怀出发,努力地向马来亚寻求写作环境和写作素材,以期达到“本土生活”的再现。在这个过程中,马华文人“乡土... 详细信息

马华文人的本土化书写过程,可以说是一个乡土再定位和身份再找寻的过程。从20世纪20年代末至40年代初,马华文人从自发的本土情怀出发,努力地向马来亚寻求写作环境和写作素材,以期达到“本土生活”的再现。在这个过程中,马华文人“乡土”和“身份”中的中国元素逐渐得到解构,并加入了马来亚元素进行重构,使得马华文人形成了“鱼尾狮”般的认同。虽然“鱼尾狮”般的认同并未彻底消除华人的“被放逐感”,但毕竟为该群体提供了一个新的共同体意象。由此可见,马华文人的本土化书写不仅是一种侨民文学走向的探索,也是一种侨民归属意识的探索。

关键词：马华文人本土化书写乡土身份认同

Potential of ginsenoside Rh_(2)and its derivatives as anti-cancer agents

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Chinese journal of Natural Medicines 2022年第12期20卷 881-901页

作者： LI Keke LI Zhongyu men Lei LI Wei GONG Xiaojie Key Laboratory of Biotechnology and Bioresources Utilization Ministry of EducationDalian Minzu UniversityDalian 116600China College of Chinese Medicinal Materials Jilin Agricultural UniversityChangchun 130118China

As a steroid skeleton-based saponin,ginsenoside Rh_(2)(G-Rh_(2))is one of the major bioactive ginsenosides from the plants of genus Panax *** studies have reported the notable pharmacological activities of G-Rh_(2)such as anticancer,antiinflammatory,antiviral,antiallergic,antidiabetic,and anti-Alzheimer’s *** preclinical studies have demonstrated the great potential of G-Rh_(2)in the trea.ment of a wide range of carcinomatous diseases in vitro and in vivo.G-Rh_(2)is able to inhibit proliferation,induce apoptosis and cell cycle arrest,retard metastasis,promote differentiation,enhance chemotherapy and reverse multi-drug resistance against multiple tumor *** present review mainly summarizes the anticancer effects and related mechanisms of G-Rh_(2)in various models as well as the recent advances in G-Rh_(2)delivery systems and structural modification to ameliorate its anticancer activity and pharmacokinetics characteristics.

关键词： Ginsenoside Rh_(2) Anticancer Mechanisms of action Synergistic effect Drug delivery systems

“固-激-增-强-育”式《药物化学》教学创新探索与实践

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

云南化工 2024年第2期51卷 162-166页

作者：门吉英王立敏赵林秀中北大学化学与化工学院国家级实验教学示范中心山西太原030054

基于传统教学中以教师为中心的不足,进行了药物化学课程创新改革。坚持“两性一度”课程建设标准,采用卡片学习固基础、案例分析激兴趣、任务驱动增水平、科教融合强工科、课程思政育新人的创新教学方法,并进行合理地课程评价。实践结... 详细信息

基于传统教学中以教师为中心的不足,进行了药物化学课程创新改革。坚持“两性一度”课程建设标准,采用卡片学习固基础、案例分析激兴趣、任务驱动增水平、科教融合强工科、课程思政育新人的创新教学方法,并进行合理地课程评价。实践结果表明,创新性教学方法能够培养具有创新能力、问题解决能力以及能够完成具有挑战高难度任务的有担当的制药专业人才。

关键词：创新教学案例分析任务驱动科教融合课程思政