检索结果-南通市图书馆

Structural design of aeroengine radiators:State of the art and perspectives

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Propulsion and Power Research 2024年第3期13卷 319-334页

作者： Cheng-Wei Fei Chen Li jia-Yi Lin yao-jia han Yat-Sze Choy Chuan-Hai Chen Department of Aeronautics and Astronautics Fudan UniversityShanghai 200433China Department of Mechanical Engineering Hong Kong Polytechnic UniversityHong Kong 999077China Key Laboratory of CNC Equipment Reliability Ministry of EducationJilin UniversityChangchun 130015China

Structural modularization,lightweight and functional integration are the urgent devel-opment directions for next generation high-performance *** concentration during aeroengine operation would lead to local high temperature,which tremendously negative impacts on aeroengine structural life and ***,the design and optimization of radiator structures are significant for the efficiency and reliability of *** structural geometry design and layout optimization of radiators is promising to improve the heat dissipation efficiency and reduce aerodynamic *** purpose of this study is to investigate the state of the art and perspectives of aeroengine radiator structural design by a comprehensive literature *** main contents involve the review on the structural design and layout optimization technologies of radiator structures,the analyses of the structural features,design theory and methods of existed radiator structures,the induction of the theory and method of different radiators structural opti-mization design,and the discussion on the application perspectives of advanced structures in aeroengine radiators,the report on the current challenges and development directions of the design of radiator structures,including smart materials,lattice structures,variable structures,advanced optimization theories and methods,heat dissipation methods and so *** efforts of this study are promising to support the high-performance and lightweight design of aeroengine structures besides radiators,and thermal management system.

关键词： Aeroengine Radiator structure Smart structure Structure design Advanced materials

16.48% Efficient solution-processed CIGS solar cells with crystal growth and defects engineering enabled by Ag doping strategy

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 Energy Chemistry 2025年第1期100卷 59-65页

作者： Mengyu Xu Shaocong Yan Ting Liang jia jia Shengjie Yuan Dongxing Kou Zhengji Zhou Wenhui Zhou Yafang Qi Yuena Meng Litao han Sixin Wu Key Laboratory for Special Functional Materials of MOE National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology School of Nanoscience and Materials Engineering Henan University

Solution-processed Cu（In,Ga）Se2（CIGS） solar cells suffer from serious carrier recombination and power conversion efficiency（PCE） loss because of the poor film properties and easy formation of ***, we propose Ag&Se co-selenization strategy to enhance the crystallization and passivate harmful defects of the CIGS films. The formation of Ag-Se phase during the selenization process enables the formation of large grains and suppresses the deep level defects. It is found that Ag doping can enlarge the depletion region width, lower the Urbach energy and prolong the carrier lifetime. As a result, a champion solution-processed CIGS solar cell presents a high efficiency of 16.48% with the highly improved opencircuit voltage（VOC） of 662 m V and fill factor（FF） of 75.8%. This work provides an efficient strategy to prepare high quality solution-processed CIGS films for high-performance CIGS solar cells.

关键词： CIGS solar cells Solution-processed method Ag doping Crystal growth Defects engineering

Anomalous quality factor evolution of induced transparency in a virtualized coupled-oscillator system

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 148-155页

作者： Yunhan Yang han jia Tuo Liu Yuzhen Yang Jun Yang Key Laboratory of Noise and Vibration Research Institute of Acoustics Chinese Academy of Sciences University of Chinese Academy of Sciences State Key Laboratory of Acoustics Institute of Acoustics Chinese Academy of Sciences

The phenomenon of induced transparency, characterized by a high quality(Q) factor, holds significant importance in the fields of high-precision sensing, energy storage and wave manipulation. Conventional transparency systems are often constrained by the limited experimentally accessible parameter space and the lack of independent control over intrinsic parameters, thereby hindering advanced research on high-Q effects. Here we propose a virtualized coupled-oscillator system that enables reconfigurable induced transparency in the reflection spectrum. By virtually incorporating a pair of coupled oscillators into an individual acoustic meta-atom, we achieve the manipulation of induced transparency in a decoupled, wide-ranging, and elaborate manner. Exploiting the diverse evolutions across the intrinsic parameter space, we show experimentally a counter-intuitive increase in the Q-factor of the transparency window, which is attributed to the enhanced dissipation of the bright ***, a constant group delay at the center frequency is observed accompanying this evolution. Our work demonstrates an intriguing platform as well as a novel strategy to engineer high-Q induced transparency phenomenon, and paves the way towards applications in programmable acoustic sensors, filters and slow-wave devices.

关键词： induced transparency acoustic meta-atom high quality-factor scattering programmable intrinsic parameter

Synergistic promotion strategy of “dual-site” and “dual-path” to enhance the C–C coupling between CO2 and HCHO driven by photoelectrocatalysis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2025年第1期100卷 39-49页

作者： Hongqiang Yang jianfeng Zheng Guoyu Wang Yifei Gao Yatao Yang jia Li Xiaojin han Yan Cui Zhanggen Huang National Key Laboratory of High Efficiency and Low Carbon Utilization of Coal Institute of Coal Chemistry Chinese Academy of Science University of Chinese Academy of Science Shenyang University of Chemical Technology

Photoelectrocatalytic coupling CO2and volatile organic compounds （VOCs） is a promising green strategy for the synergistic conversion of the two carbon-containing resources to *** catalytic efficiency is always at the mercy of chemical inertness of CO2and the competitive hydrogen evolution of ***,a modified g-C3N4/ZnAl-LDH Z-scheme heterojunction catalyst with dual reaction site was rationally designed and precisely *** Faraday efficiency of ethanol reached 68.67%with a corresponding formation rate of 227.3μmol *** revealed by in-situ characterizations and density functional theory calculations,CO2and HCHO were absorbed at Zn site and N site,***,*CO generated from CO2and HCHO was converted to*CH3O and*CHO on the dual-active-site *** detailed reaction mechanism experiments indicated that C–C coupling only occurred between*CO and*CH3O in electrocatalysis *** from the“*CO+*CH3O”path,another“*CO+*CHO”coupling path was also detected in photoelectrocatalytic *** selectivity of ethanol was significantly enhanced due to the synthesis of dual-site catalyst and the dual-path coupling path between CO2and HCHO simultaneously driven by light and electricity.

关键词： Photoelectrocatalysis Z-scheme C–C coupling Ethanol

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

益生菌调节肠上皮细胞免疫反应的研究进展

微生物学免疫学进展 2018年第1期46卷 80-84页

作者：杜仁佳张瑶吕佳韩蓓西安交通大学医学部公共卫生学院营养与食品安全系陕西西安710061

肠道不仅是消化吸收的场所,而且是人体重要的免疫器官。益生菌通常被认为是胃肠道共生菌,摄入适量时,可对宿主产生益处。现就益生菌可调节肠道屏障功能,并通过固有免疫和适应性免疫反应来调节肠上皮细胞介导的免疫反应的相关研究作一综... 详细信息

肠道不仅是消化吸收的场所,而且是人体重要的免疫器官。益生菌通常被认为是胃肠道共生菌,摄入适量时,可对宿主产生益处。现就益生菌可调节肠道屏障功能,并通过固有免疫和适应性免疫反应来调节肠上皮细胞介导的免疫反应的相关研究作一综述,为开发新型益生菌制剂,抑制肠道病原菌提供了研究思路。

关键词：益生菌肠黏膜屏障固有免疫适应性免疫

维普期刊数据库

在线全文

学校读者我要写书评

暂无评论

干细胞的趋电性迁移及机制

中国组织工程研究 2025年第23期29卷 4984-4992页

作者：韩芳舒晴贾绍辉田峻武汉体育学院运动医学院湖北省武汉市430079 武汉大学中南医院骨科康复科湖北省武汉市430071

背景:随着对干细胞技术研究的深入,如何使其准确归巢成为临床应用中的一大难题。除药物和趋化因子等信号的诱导外,电场也被广泛应用于指导干细胞的定向迁移,并可增强其迁移速度和定向性。目的:旨在分析总结电场对干细胞迁移特性的影响,... 详细信息

背景:随着对干细胞技术研究的深入,如何使其准确归巢成为临床应用中的一大难题。除药物和趋化因子等信号的诱导外,电场也被广泛应用于指导干细胞的定向迁移,并可增强其迁移速度和定向性。目的:旨在分析总结电场对干细胞迁移特性的影响,同时综述可能的作用机制。方法:通过检索Pub Med和中国知网数据库,收集截至2024年3月的相关文献,英文检索词:“stem cells,direct current electric field,pulsed electric field,migration,electric field device,mechanism”;中文检索词:“干细胞,直流电场,脉冲电场,迁移,电场装置,机制”。排除不能获取全文和与主题无关的文献。结果与结论:根据筛选要求共纳入58篇文献,包括中文文献15篇及英文文献43篇。文献以脂肪间充质干细胞、骨髓间充质干细胞、神经干细胞、表皮干细胞、人胚胎干细胞和人诱导性多功能干细胞为研究对象,在迁移装置中研究电场的不同参数对上述干细胞迁移的影响及其机制。(1)电场作为一种简单、无创且稳定的干预方式在指导干细胞定向迁移的过程中起着积极作用;(2)不同类型的干细胞发生趋电性迁移的方向不同,同时大部分干细胞的迁移速度和定向性是随着电场强度增加而增加的;(3)不同的电场装置在观测干细胞迁移时的侧重点不同,可根据实验目的而择优选择相关装置;(4)不同干细胞趋电性迁移的机制不完全相同,多数干细胞迁移过程中有MAPK通路、ROCK活化以及PI3K功能的参与,同时还有其他蛋白质复合物与信号通路参与调控该过程;(5)除电场参数不同之外,细胞本身的衰老情况和培养环境也会对趋电性迁移的结果产生影响。总而言之,电场作为一种影响干细胞迁移特性的重要信号,与其他新兴材料结合在组织工程应用中展现出了一定的潜力,有望在指导干细胞归巢方面发挥更加重要的作用,促进骨组织再生和修复以及神经系统、自身免疫系统以及肿瘤等疾病的研究取得更大的突破。

关键词：干细胞电场趋电性迁移机制归巢效应物理因子电场装置细胞衰老培养环境

维普期刊数据库

Detection of Hydrazine at MXene/ZIF-8 Nanocomposite Modified Electrode

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Chemistry 2021年第2期39卷 330-336页

作者： Yanqing yao Xuhui han Xuanhe Yang jia Zhao Chunpeng Chai School of Materials Science and Engineering Beijing Institute of TechnologyBeijing100081 China

ZIF-8 with excellent chemical and physical properties is a promising material for the field of electrochemical ***,the poor electrical conductivity of ZIF-8 severely limits its electrochemical ***,we report a method that can significantly improve the conductivity of ZIF-8 by intercalating Ti_(3)C_(2)T_(x) MXene as a conductive *** from higher conductivity and unique electrocatalytic activity,the obtained MXene/ZIF-8 nanocomposite presented the worthy analytical performance for hydrazine *** successful fabrication of MXene/ZIF-8 holds great promise for the design of electrochemical sensors,and it is a promising material to promote the development of new electrode materials.

关键词： ZIF-8 MXene Hydrazine detection Electrochemistry Cyclic voltammetry

Parametric Dimensional Analysis on the Structural Response of An Innovative Subsurface Tension Leg Platform in Ultra-Deep Water

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China Ocean Engineering 2018年第4期32卷 482-489页

作者： ZHEN Xing-wei WU jia-hao HUANG Yi han Yue yao Jin-jiang School of Naval Architecture and Ocean Engineering Faculty of Vehicle Engineering and Mechanics Dalian University of Technology

The innovative Subsurface Tension Leg Platform(STLP), which is designed to be located below Mean Water Level(M.W.L) to minimize direct wave loading and mitigate the effect of strong surface currents, is considered as a competitive alternative system to support shallow-water rated well completion equipment and rigid risers for large ultra-deep water oil field development. A detailed description of the design philosophy of STLP has been published in the series of papers and patents. Nonetheless, design uncertainties arise as limited understanding of various parameters effects on the structural response of STLP, pertaining to the environmental loading, structural properties and hydrodynamic characteristics. This paper focuses on providing quantitative methodology on how each parameter affects the structural response of STLP, which will facilitate establishing the unique design criteria as regards to STLP. Firstly, the entire list of dimensionless groups of input and output parameters is proposed based on VaschyBuckingham theory. Then, numerical models are built and a series of numerical tests are carried out for validating the obtained dimensionless groups. On this basis, the calculation results of a great quantity of parametric studies on the structural response of STLP are presented and discussed in detail. Further, empirical formulae for predicting STLP response are derived through nonlinear regression analysis. Finally, conclusions and discussions are made. It has been demonstrated that the study provides a methodology for better control of key parameters and lays the foundation for optimal design of STLP. The obtained conclusions also have wide ranging applicability in reference to the engineering design and design analysis aspects of deepwater buoy supporting installations, such as Grouped SLOR or TLR system.

关键词： subsurface tension leg platform structural response dimensional analysis ultra-deep water

维普期刊数据库

Alternatively mechanistic insights into acetylation in p53-mediated transcriptional regulation of cancer cell-intrinsic PD-1

在线全文

学校读者我要写书评

暂无评论

Fundamental Research 2023年第4期3卷 647-654页

作者： jia Wen han yao Zhijie Cao Donglai Wang State Key Laboratory of Medical Molecular Biology&Department of Medical Genetics Institute of Basic Medical Sciences&School of Basic MedicineChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100005China

Since the recent discovery of cancer cell-intrinsic programmed cell death protein-1(PD-1),the mechanisms that manipulate PD-1 functions in tumor development beyond its immune checkpoint roles have become attractive research topics in *** previous study validated that PD-1 exists in lung cancer cells and is directly transactivated by p53 in a DNA-binding domain(DBD)acetylation-dependent ***,we report that the carboxyl-terminal domain(CTD)of p53 likewise participates in PD-1 transcriptional regulation in cancer cells under different regulatory *** mutating the lysine residues within the CTD to mimic either acetylationdeficient or fully acetylated status,we proved that acetylated CTD dramatically impeded p53-mediated transactivation of ***,we identified bromodomain-containing protein 4(BRD4)as a transcriptional coactivator of p53 that facilitates p53-mediated PD-1 ***,BRD4 specifically bound to the unacetylated CTD of p53,while CTD acetylation almost completely destroyed the BRD4-p53 interaction and thus led to compromised PD-1 ***,this study unveils an alternative mechanism of p53 acetylation-directed PD-1 transcriptional regulation,which would broaden our current understanding of the molecular regulatory network of cancer cell-intrinsic PD-1.

关键词： p53 Acetylation PD-1 BRD4 Carboxyl-terminal Domain(CTD)