检索结果-南通市图书馆

Relationship of Corrosion Behavior Between Single-Phase Equiatomic CoCrNi,CoCrNiFe,CoCrNiFeMn Alloys and Their Constituents in NaCl Solution

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

Acta Metallurgica Sinica(English Letters) 2021年第11期34卷 1574-1584页

作者： D.P.wang j.w.Shen Z.Chen F.G.Chen P.Y.guo Y.X.Geng Y.X.wang School of Materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China

The composition is a significant issue for corrosion resistance of metallic *** reveal the correlation of corrosion behavior between multiprinciple alloys and their constituents,a series of single-phase equiatomic alloys of CoCrNi,CoCrNiFe and CoCrNiFeMn was *** electrochemical and scanning electron microscope results demonstrated that corrosion resistance of the equiatomic alloys in 0.1 M NaCl solution is located in the range but not the average value of their constituents.X-ray photoelectron spectroscopy analysis indicated that the protective performance of passive film is mainly determined by the constituent with the highest corrosion resistance and the breakdown of passive film is mainly dominated by the elements with the highest corrosion *** findings can guide the materials design of multiprinciple alloys with expected corrosion performance.

关键词： High-entropy alloy Corrosion Constituent X-ray photoelectron spectroscopy(XPS) Passive films

Mechanical properties and simulated thermal conductivity of biomimetic structured PS-PVD(Gd_(0.9)Yb_(0.1))_(2)Zr_(2)O_(7) thermal barrier coatings

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15期182卷 33-40页

作者： Yiqian guo Lei guo Keyi Liu Shiyi Qiu Hongbo guo Huibin Xu School of Materials Science and Engineering Beihang UniversityBeijing 100191China School of Materials Science and Engineering Tianjin UniversityTianjin 300072China Chinese Aeronautical Establishment Beijing 100012China Tianmushan Laboratory Yuhang DistrictHangzhou 311115China Research Institute for Frontier Science Beihang UniversityBeijing 100191China

Plasma spray physical vapor deposition(PS-PVD)(Gd_(0.9)Yb_(0.1))_(2)Zr_(2)O_(7)(GYbZ)thermal barrier coatings(TBCs)exhibited better silicate-phobicity than coatings produced by electron beam physical vapor *** combination with PS-PVD and ultrafast laser direct writing technology,biomimetic structured GYbZ TBCs,with a triple-scale micro/nano surface microstructure,were *** ablating on the PS-PVD GYbZ coating enhanced the surface roughness,improving its wear resistance without increasing the surface ***,during the laser ablation processing,numerous nanoparticles were deposited in-situ in the gaps between columns of the coating,reducing the coating Young’s *** simulated temperature field and heat flux field demonstrated that the presence of numerous interfaces between small columns of the PS-PVD coatings is beneficial to thermal ***,laser ablation decreased the coating thickness,reducing the thermal insulation by around 20%-30%as compared to its PS-PVD counterpart,suggesting that a moderate increase in the coating thickness should be considered when designing an efficient TBC system.

关键词： Thermal barrier coatings(TBCs) Plasma spray physical vapor deposition (PS-PVD) Laser ablation Biomimetic structure Mechanical properties Thermal insulation

长期施肥下土壤氮素指标与小麦/玉米产量关系研究

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

核农学报 2025年第1期39卷 157-169页

作者：丁世杰黄绍敏张水清郭斗斗宋晓张珂珂岳克郭腾飞河南省农业科学院植物营养与资源环境研究所河南郑州450002 信阳市农业科学院河南信阳464000

为明确施肥对典型潮土区土壤氮素指标的影响以及氮素指标与作物产量的量化关系,本研究利用长期定位施肥试验系统评估施肥对土壤全氮、碱解氮、酸解有机氮组分、微生物量氮含量的影响,并进一步定量分析氮素指标与小麦、玉米产量间的关系... 详细信息

为明确施肥对典型潮土区土壤氮素指标的影响以及氮素指标与作物产量的量化关系,本研究利用长期定位施肥试验系统评估施肥对土壤全氮、碱解氮、酸解有机氮组分、微生物量氮含量的影响,并进一步定量分析氮素指标与小麦、玉米产量间的关系。结果表明,与单施化肥或不施肥相比,长期化肥与秸秆或有机肥配施在显著提高土壤全氮含量的同时,对碱解氮、酸解总氮、酸解铵态氮、氨基酸态氮与微生物量氮含量的提高也有明显的促进作用。除土壤全氮外的其他氮素指标含量在高量化肥-有机肥配施、化肥-秸秆还田和常量化肥-有机肥配施处理间无显著差异。土壤全氮、微生物量氮和碱解氮含量是对作物产量影响程度相对较大的氮素指标。土壤全氮含量每增加0.1 g·kg^(−1),小麦和玉米分别增产822.7和968.2 kg·hm^(-2)。土微生物量氮与碱解氮含量每增加1 mg·kg^(−1),小麦增产195.2与58.1 kg·hm^(-2);玉米增产189.9与79.1 kg·hm^(-2)。酸解总氮与氨基酸态氮含量对小麦产量也有显著影响,酸解总氮与氨基酸态氮含量每增加1 mg·kg^(−1),小麦分别增产15.8与30.0 kg·hm^(-2)。综上所述,化肥与秸秆或有机肥配施可提高潮土氮素库容与供氮能力。小麦、玉米产量随土壤全氮、微生物量氮与碱解氮含量的提高呈线性增长,小麦产量与酸解总氮和氨基酸态氮含量呈显著正相关。本研究为典型潮土区地力培育与粮食丰产提供了理论依据和技术支撑。

关键词：长期定位试验施肥土壤氮素指标作物产量

Study on a 5.0 w/80 K single stage Stirling type pulse tube cryocooler

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

journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第9期9卷 1277-1282页

作者： Zhi-hua GAN guo-jun LIU Ying-zhe wO Qiang CAO Li-min QIU guo-bang CHEN j.M. PFOTENHAUER Cryogenics Laboratory Institute of Refrigeration and Cryogenics School of Mechanical and Energy Engineering Zhejiang University Hanghzou 310027 China Cryogenic Engineering Laboratory University of Wisconsin-Madison Madison WI 53706 USA

A single stage Stifling pulse tube cryocooler was designed based on REGEN 3.2 and fabricated for testing. The experimental results show that the cooler can provide a cooling capacity of 5.0 w at 79.1 K, and produce a no-load temperature of 57.0 K, operating with an average pressure of 2.50 MPa and a frequency of 60 Hz, performance results that are very close to the calculated values. The cryocooler can be cooled from room temperature to 80 K in 8.5 min. The fast cooldown time is a result of the small regenerator.

关键词： Cryocooler Regenerator High frequency Pulse tube

Novel transcatheter aortic heart valves exhibiting excellent hemodynamic performance and low-fouling property

在线全文

学校读者我要写书评

暂无评论

journal of Materials Science & Technology 2019年第1期35卷 207-215页

作者： F.guo K.jiao Y.Bai j.guo Q.Chen R.Yang X.Zhang Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences School of Materials Science and Engineering University of Science and Technology of China School of Textile and Material Engineering Dalian Polytechnic University Lumenous Peiertech

Transcatheter aortic heart valves(TAHVs) have been widely used for aortic valve replacements, with less trauma and lower clinical risk compared with traditional surgical heart valve replacements. In the present study, composites of poly(ethylene glycol) diacrylate(PEGDA) hydrogels and anisotropic highshrinkage polyethylene terephthalate/polyamide6(PET-PA6) fabric(PEGDA/PET-PA6) were fabricated as artificial heart valve leaflets. Dynamic mechanical analyses(DMA) indicated that PEGDA/PET-PA6 composites possessed anisotropic mechanical properties(i.e., storage moduli ~23.30 ± 1.36 MPa parallel to the aligned fabric fibers and ~9.68 ± 0.90 MPa perpendicular to the aligned fibers at 1 Hz) that were comparable to aortic valve leaflets. The PEGDA/PET-PA6 composites with smooth surfaces were highly hydrophilic(contact angle ~41.6°± 3.8°) and had low-fouling properties without platelet adhesion,suggesting a low risk of thrombogenicity when they interacted with blood. Furthermore, transcatheter aortic heart valves were fabricated using nitinol self-expanding frames and PEGDA/PET-PA6 composites as artificial leaflets, which presented excellent hemodynamic performance with a large orifice area(1.75cm2) and low regurgitation(3.41%), thus meeting the requirements of ISO 5840-3 standard. Therefore,PEGDA/PET-PA6 composites had suitable mechanical properties, good biocompatibility, and low-fouling properties, indicating that they might be used for TAHVs in the future.

关键词： Transcatheter aortic heart valve Textile fabric Poly(ethylene glycol)diacrylate Anti-fouling

Liquid metal compartmented by polyphenol-mediated nanointerfaces enables high-performance thermal management on electronic devices

在线全文

学校读者我要写书评

暂无评论

InfoMat 2024年第1期6卷 83-95页

作者： Chaojun Zhang Yang Tang Tianyu guo Yizhou Sang Ding Li Xiaoling wang Orlando j.Rojas junling guo BMI Center for Biomass Materials and Nanointerfaces College of Biomass Science and EngineeringSichuan UniversityChengduSichuanthe People's Republic of China Bioproducts Institute Departments of Chemical and Biological EngineeringThe University of British ColumbiaVancouverBritish ColumbiaCanada Institute of Development Studies Southwestern University of Finance and EconomicsChengduSichuanthe People's Republic of China National Engineering Laboratory for Clean Technology of Leather Manufacture Sichuan UniversityChengduSichuanthe People's Republic of China State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengduSichuanthe People's Republic of China

The exponentially increasing heat generation in electronic devices,induced by high power density and miniaturization,has become a dominant issue that affects carbon footprint,cost,performance,reliability,and *** metals(LMs)with high thermal conductivity are promising candidates for effective thermal management yet are facing pump-out and surface-spreading *** in the form of metallic particles can address these problems,but apparent alloying processes elevate the LM melting point,leading to severely deteriorated ***,we propose a facile and sustainable approach to address these challenges by using a biogenic supramolecular network as an effective diffusion barrier at copper particle-LM(EGaIn/Cu@TA)interfaces to achieve superior thermal *** supramolecular network promotes LM stability by reducing unfavorable alloying and fluidity *** EGaIn/Cu@TA exhibits a record-high metallic-mediated thermal conductivity(66.1 w m^(-1) K^(-1))and fluidic ***,mechanistic studies suggest the enhanced heat flow path after the incorporation of copper particles,generating heat dissipation suitable for computer central processing units,exceeding that of commercial *** results highlight the prospects of renewable macromolecules isolated from biomass for the rational design of nanointerfaces based on metallic particles and LM,paving a new and sustainable avenue for high-performance thermal management.

关键词： Electronic devices High thermal conductivity Liquid metals Natural polyphenols Thermal management

High-Performance InTiZnO Thin-Film Transistors Deposited by Magnetron Sputtering

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

Chinese Physics Letters 2013年第12期30卷 126-129页

作者： LIU Ao LIU guo-Xia SHAN Fu-Kai ZHU Hui-Hui B.C.Shin w.j.Lee C.R.Cho College of Physics Science Qingdao UniversityQingdao 266071 Lab of New Fiber Materials and Modern Textile Growing Base for State Key LaboratoryQingdao UniversityQingdao 266071 Electronic Ceramics Center DongEui UniversityBusan 614714South Korea College of Nanoscience and Nanotechnology Pusan National UniversityBusan 609735South Korea

InTiZnO thin-film transistors(ITZO TFTs)with Al_(2)O_(3)gate dielectrics are fabricated by magnetron sputtering at room *** bottom-gate-type ITZO TFTs with amorphous Al_(2)O_(3)gate dielectrics are operated in the enhancement mode and exhibit a mobility of 50.4 cm^(2)/V·s,threshold voltage of 1.2 V,subthreshold swing of 94.5 mV/decade,and on/off-current ratio of 7×10^(6).we believe that ITZO deposited at room temperature is an appropriate semiconductor material to produce high-mobility TFTs for developing flexible electronic devices.

关键词： temperature mobility film

企业数实技术融合与新质生产力发展——来自企业专利信息的经验证据

在线全文

学校读者我要写书评

暂无评论

华东经济管理 2025年第1期39卷 1-9页

作者：郭娜陈东晖胡丽宁天津财经大学金融学院天津300222

文章以2013—2023年我国上市企业为研究对象,通过手工整理208万条企业专利信息,借助深度学习算法测算专利文本语义以构建企业数实技术融合指数与新质生产力指标。实证检验发现,企业数实技术融合能够有效促进新质生产力发展,且对创新突... 详细信息

文章以2013—2023年我国上市企业为研究对象,通过手工整理208万条企业专利信息,借助深度学习算法测算专利文本语义以构建企业数实技术融合指数与新质生产力指标。实证检验发现,企业数实技术融合能够有效促进新质生产力发展,且对创新突破和绿色转型两类新质生产力均有促进作用,两者存在显著的杠杆效应。机制分析表明,数实技术融合通过降低企业生产成本、提高管理能力、抑制研发操纵以推动企业新质生产力发展。异质性分析发现,在大型国有企业和管理层创新意识、数字化思维较强的企业,数实技术融合的赋能效果更明显。经济后果检验显示,数实技术融合对企业新质生产力的赋能作用是实现经济高质量发展的关键路径。

关键词：企业数实技术融合新质生产力深度学习专利文本语义高质量发展

Preparation and application of microfluidic SERS substrate:Challenges and future perspectives

维普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

journal of Materials Science & Technology 2020年第2期37卷 96-103页

作者： jiuchuan guo Fanyu Zeng jinhong guo Xing Ma School of Information and Communication Engineering University of Electronic Science and Technology of ChinaChengdu 610054China State Key Laboratory of Advanced welding and joining Harbin Institute of Technology(Shenzhen)Shenzhen 518055China Flexible Printed Electronic Technology Center School of Materials Science and EngineeringHarbin Institute of Technology(Shenzhen)Shenzhen 518055China

Surface-enhanced Raman spectroscopy(SERS),as a highly sensitive molecular analysis technique,can realize fast and non-destructive detection of the information of molecular bonds to identify the component of analytes by"fingerprint"*** preparation of SERS substrates plays an extremely important role in the development of SERS technology and the application of SERS *** integrating SERS enhancement substrates into microfluidic chips,researchers have developed the microfluidic SERS chips which expand the function of microfluidic chips and provide an efficient platform for on-site biochemical analysis equipped with the powerful sensing capability of SERS *** this paper,we will first briefly give a review of the current microfluidic SERS-active substrates preparation technology and present the perspective on the application prospects of microfluidic SERS-active *** then the challenges in the preparation of microfluidic SERS-active substrates will be pointed out,as well as realistic issues of using this technology for biochemical application.

关键词： SERS substrate Microfluidics Biochemical sensing On-site analysis