检索结果-南通市图书馆

International Journal of Minerals,Metallurgy and Materials 2012年第2期19卷 122-130页

作者： jiao luo Bin Wu Miao-quan Li School of Materials Science and Engineering Northwestern Polytechnical UniversityXi'an 710072China

The physically-based internal state variable （ISV） models were used to describe the changes of dislocation density, grain size, and flow stress in the high temperature deformation of titanium alloys in this study. The constants of the present models could be identified based on experimental results, which were conducted at deformation temperatures ranging from 1093 K to 1303 K, height reductions ranging from 20% to 60%, and the strain rates of 0.001, 0.01, 0.1, 1.0, and 10.0 s-1. The physically-based internal state variable models were implemented into the commercial finite element （FE） code. Then, a three-dimensional （3D） FE simulation system coupling of deformation, heat transfer, and microstructure evolution was developed for the blade forging of Ti-6Al-4V alloy. FE analysis was carried out to simulate the microstructure evolution in the blade forging of Ti-6Al-4V alloy. Finally, the blade forging tests of Ti-6Al-4V alloy were performed to validate the results of FE simulation. According to the tensile tests, it is seen that the mechanical properties, such as tensile strength and elongation, satisfy the application requirements well. The maximum and minimum differences between the calculated and experimental grain size of primary α phase are 11.71% and 4.23%, respectively. Thus, the industrial trials show a good agreement with FE simulation of blade forging.

关键词： titanium alloys forging microstructure evolution internal state variables mechanical properties

Reversible aqueous aluminum metal batteries enabled by a water-in-salt electrolyte

在线全文

学校读者我要写书评

暂无评论

Green Energy & Environment 2024年第7期9卷 1183-1191页

作者： Wenjing Tang Lijun Deng Longyuan Guo Shoubin Zhou Qinhai Jiang Jiayan luo Shanghai Key Lab of Advanced High-Temperature Materials and Precision Forming State School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai200240China School of Science Harbin Institute of TechnologyShenzhenGuangdong518055China Key Laboratory for Green Chemical Technology of Ministry of Education School of Chemical Engineering and TechnologyTianjin UniversityTianjin300072China HuaFu High Technology Energy Storage CO. LTDYangzhou225600China Shanghai jiao Tong University Shaoxing Research Institute of Renewable Energy and Molecular Engineering Shaoxing312000China

Aluminum(Al),the most abundant metallic element on the earth crust,has been reckoned as a promising battery material for its the highest theoretical volume capacity(8046 mAh cm^(-3)).Being rechargeable in ionic liquid electrolytes,however,the Al anode and battery case suffer from *** the other hand,Al is irreversible in aqueous electrolyte with severe hydrogen evolution ***,we demonstrate a water-in-salt aluminum ion electrolyte(WISE)based on Al and lithium salts to tackle the above *** the WISE system,water molecules can be confined within the Li^(+)solvation *** diminished Al^(3+)-H_(2)O interaction essentially eliminates the hydrolysis effect,effectively protecting Al anode from ***,long-term Al plating/stripping can be ***,two types of high-performance full batteries have been demonstrated using copper hexacyanoferrate(CuHCF,a Prussian Blue Analogues)and LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)(NCM)as *** reversibility of Al anode laid the foundation for low cost rechargeable batteries suffering for large-scale energy *** context:Al batteries are expected to become a safe and sustainable alternative to lithium *** decades,chase for a feasible Al secondary battery has not been *** key challenge is to find suitable cathode and electrolyte materials,together with which Al anode battery can function ***,fatal drawbacks have impeded the practical application of Al metal batteries(AMBs),such as sustained corrosion of Al anode and battery case in ionic liquid electrolytes,irreversibility issues as well as severe hydrogen evolution reaction during cycling in aqueous ***,electrolyte and their electrochemical kinetics play a vital role in the performance and environmental operating limitations of high-energy Al metal *** this work,we demonstrate a nearly neutral Al ion water-in-salt electrolyte(WISE)to tackle the above chal

关键词： Water-in-salt electrolyte Rechargeable aluminum anode Solvation sheath Hybrid battery Abundance

旅游仪式理论视域下旅游仪式感的内涵及多维测度研究

在线全文

学校读者我要写书评

暂无评论

人文地理 2024年第2期39卷 173-180页

作者：骆晶晶吕兴洋焦彦唐孜彦西南财经大学工商管理学院成都611130 南开大学旅游与服务学院天津300350 四川大学文化科技协同创新研发中心成都610065

旅游仪式感是满足旅游者深度精神体验需求的重要途径,但对其内涵维度缺乏统一的认识和科学有效的测量指标,限制了后续的理论发展。本文从旅游仪式理论视角出发,提出一个更加综合、更具包容性的旅游仪式感定义,并通过质性研究,识别出旅... 详细信息

旅游仪式感是满足旅游者深度精神体验需求的重要途径,但对其内涵维度缺乏统一的认识和科学有效的测量指标,限制了后续的理论发展。本文从旅游仪式理论视角出发,提出一个更加综合、更具包容性的旅游仪式感定义,并通过质性研究,识别出旅游仪式感的六个属性维度:象征性、场域性、形式性、反结构性、区分性、隔离性。在此基础上,开发出包含22个题项的旅游仪式感量表,并对量表的效度进行了检验。研究结果揭示了旅游仪式感的抽象本质,弥补了以往旅游仪式感概念界定模糊与遗漏的缺点,为未来深入开展旅游仪式感研究提供了理论参照和技术保障。

关键词：旅游仪式感属性维度量表开发

在线全文

学校读者我要写书评

暂无评论

河虾过敏原原肌球蛋白的基因克隆与原核表达

食品科学 2024年第13期45卷 89-95页

作者：骆叶晴郑双艳孙耀斌陈娇刘鑫陈红兵谢彦海南昌大学食品科学与资源挖掘全国重点实验室江西南昌330047 南昌大学中德联合研究院江西南昌330047 南昌大学食品学院江西南昌330047

为了探寻天然原肌球蛋白的可替代物作为诊断和治疗虾类过敏的基础材料,本研究从河虾中提取总RNA,利用cDNA末端快速扩增技术克隆河虾过敏原原肌球蛋白基因的全长序列。以此序列设计表达引物,构建表达载体,最后通过异丙基-β-D-硫代半乳糖... 详细信息

为了探寻天然原肌球蛋白的可替代物作为诊断和治疗虾类过敏的基础材料,本研究从河虾中提取总RNA,利用cDNA末端快速扩增技术克隆河虾过敏原原肌球蛋白基因的全长序列。以此序列设计表达引物,构建表达载体,最后通过异丙基-β-D-硫代半乳糖苷(isopropyl-β-D-thiogalactopyranoside,IPTG)诱导表达重组原肌球蛋白。结果显示,河虾的原肌球蛋白基因cDNA序列全长1658 bp,开放阅读框855 bp,编码284个氨基酸,预测蛋白等电点4.70,预测分子质量32.8 kDa。河虾原肌球蛋白cDNA序列已上传至GenBank数据库,登录号为OP974621。本研究成功构建河虾原肌球蛋白重组表达质粒pET-30a-TM,并用IPTG进行体外诱导表达,最佳诱导条件为IPTG浓度1 mmol/L、37℃诱导4 h。可溶性分析结果表明重组原肌球蛋白主要以可溶性形式存在于细胞破碎液的上清液中,分子质量约38 kDa。

关键词：河虾原肌球蛋白基因克隆原核表达重组蛋白

Synthesis of Multi-Walled Carbon Nanotubes/ZnO Nanocomposites Using Absorbent Cotton

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2011年第2期3卷 115-120页

作者： jiao Qu Chunqiu luo Qiao Cong School of Chemistry and Chemical Engineering Bohai University School of Urban and Environmental Sciences Northeast Normal University

This letter focuses on the synthesis of multi-walled carbon nanotubes(MWNTs) and MWNTs/ZnO nanocomposites using absorbent *** MWNTs have been synthesized by a rapid heating of absorbent cotton at different temperature(400,550,600).The MWNTs/ZnO nanocomposites have been synthesized by heating mixtures of Zn(OH)_2/H_2O/absorbent cotton at different temperature(at about 550 and600).The X-ray diffraction(XRD) pattern and energy dispersive spectrum(EDS) clearly show that the pure MWNTs and ZnO nanocomposites(with a mean size of 35.9 nm) were *** scanning electron microscopy(SEM) images demonstrate that the structure of synthesized MWNTs was middle-hollow,with inner and outer diameter of around 10 and 80 *** ZnO nanocomposites that had grown on the walls of MWNTs were nonuniform and agglomerated,with an outer diameter of around 110 *** selected area diffraction(SAD) patterns and Raman spectrum indicate that the MWNTs were well-crystallised,and there are a few defects in the *** absorption spectroscopy(IR) spectra suggest that the surface of MWNTs has been covered by ZnO.

关键词： MWNT MWNTs/ZnO nanocomposites Characteristic

Measurement and analysis of the surface roughness of Ag film used in plasmonic lithography

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2017年第1期26卷 363-368页

作者： Gao-Feng Liang jiao jiao Xian-Gang luo Qing Zhao School of Physical Electronics University of Electronic Science and Technology of China Chengdu 610054 China State Key Laboratory of Optical Technologies for Microfabrication Institute of Optics and Electronics Chinese Academy of Sciences Chengdu 610209 China

The silver（Ag）/photoresist（PR）/Ag structure, widely used in plasmonic photolithography, is fabricated on silicon substrate. The surface roughness of the top Ag film is measured and analyzed systematically. In particular, combined with template stripping technology, the lower side of the top Ag film is imaged by an atomic force microscope. The topographies show that the lower side surface is rougher than the initial surface of the subjacent PR film, which is mainly attributable to the deformation caused by particle collisions during the deposition of the Ag film. Additionally, further measurements show that the Ag film deposited on the PR exhibits a flatter upper side morphology than that directly deposited on the silicon substrate. This is explained by the different growth modes of Ag films on different substrates. This work will be beneficial to morphology analysis and performance evaluation for the films in optical and plasmonic devices.

关键词： surface roughness lithography silver film deposition

Internal state variable models for micro-structure in high temperature deformation of titanium alloys

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2008年第11期51卷 1921-1929页

作者： luo jiao LI MiaoQuan LI XiaoLi School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China

There exists an interaction between microstructural evolution and deformation behavior in high temperature deformation of titanium alloys. And the microstruc- ture of titanium alloys is very sensitive to the process parameters of plastic de- formation process. In this paper, on the basis of plastic deformation mechanism of metals and alloys, a microstructural model including dislocation density rate equa- tion and grain growth rate equation is established with the dislocation density rate being an internal state variable. Applying the model to the high temperature de- formation process of Ti60 titanium alloy, the average relative errors of grain sizes between the experiments and the predictions are 9.47% for sampled data, and 13.01% for non-sampled data.

关键词： titanium alloy grain size dislocation density models parameter recognition

疏风解毒胶囊治疗慢性阻塞性肺疾病急性加重期的Meta分析及药物经济学评价

在线全文

学校读者我要写书评

暂无评论

中药药理与临床 2024年第6期40卷 83-88页

作者：任慧君许晶晶罗娇徐敏杨艳付昆成都市第三人民医院药学部成都610014

目的:系统评价疏风解毒胶囊(SFJDC)联合西医常规与西医常规治疗慢性阻塞性肺疾病加重期(AECOPD)的临床疗效和经济性。方法:检索中国学术期刊全文数据库(CNKI)、万方数据知识服务平台、维普中文科技期刊数据库(VIP)、PubMed、EMbase数据... 详细信息

目的:系统评价疏风解毒胶囊(SFJDC)联合西医常规与西医常规治疗慢性阻塞性肺疾病加重期(AECOPD)的临床疗效和经济性。方法:检索中国学术期刊全文数据库(CNKI)、万方数据知识服务平台、维普中文科技期刊数据库(VIP)、PubMed、EMbase数据库,检索日期截至2023年6月,按照纳入与排除标准筛选文献,提取数据,通过Meta分析与成本效果分析法对2种方案治疗慢性阻塞性肺疾病临床疗效和经济性进行评价。结果:临床疗效:疏风解毒胶囊联合方案与常规方案治疗AECOPD总有效率分别为88.43%和73.69%,且安全性无显著差异。经济性:疏风解毒胶囊联合方案与常规方案治疗AECOPD住院与非住院患者总有效率的成本效果分析发现,疏风解毒胶囊联合方案组成本效果比(CER)小于常规方案组,表明疏风解毒联合方案更具有经济性。敏感性分析结果较为稳健。结论:疏风解毒胶囊联合常规方案在治疗AECOPD的临床疗效和经济性方面,都优于常规治疗方案,为优势方案。

关键词：疏风解毒胶囊 Meta分析成本效果分析慢性阻塞性肺病急性加重期

Detection and isolation of false data injection attack via adaptive Kalman filter bank

在线全文

学校读者我要写书评

暂无评论

Journal of Control and Decision 2024年第1期11卷 60-72页

作者： Xiaoyuan luo Minggao Zhu Xinyu Wang Xinping Guan School of Electrical Engineering Yanshan UniversityQinhuangdaoPeople’s Republic of China Jiangsu Collaborative Innovation Center for Smart Distribution Network NanjingPeople’s Republic of China School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghaiPeople’s Republic of China

Due to the integration of cyber–physical systems,smart grids have faced the new security risks caused by false data injection attacks(FDIAs).FDIAs can bypass the traditional bad data detection techniques by falsifying the process of state *** this reason,this paper studies the detection and isolation problem of FDIAs based on the adaptive Kalman filter bank(AKFB)in smart *** the covert characteristics of FDIAs into account,a novel detection method is proposed based on the designed ***,the adaptive threshold is proposed to solve the detection delay caused by a priori threshold in the current detection *** the case of multiple attacked sensor nodes,the AKFB-based isolation method is *** reduce the number of isolation iterations,a logical decision matrix scheme is ***,the effectiveness of the proposed detection and isolation method is demonstrated on an IEEE 22-bus smart grids.

关键词： Smart grids false data inject attack detection and isolation Kalman filter bank

小金丸组方药物与生产工艺的风险分析与控制策略

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

中华中医药杂志 2024年第2期39卷 826-831页

作者：宋娇廖维张定堃罗传红曾嵘许润春韩丽成都中医药大学药学院西南特色中药资源国家重点实验室成都611137 成都九芝堂金鼎药业有限公司成都610051

小金丸是中医临床治疗乳腺增生的首选中成药。近年来,随着对小金丸研究的不断深入,有关其质量控制问题及不良反应的报道逐渐增多。复杂的药物来源、多变的药材质量、不同的物料性质与特殊的生产工艺多因素综合叠加,严重影响小金丸质量... 详细信息

小金丸是中医临床治疗乳腺增生的首选中成药。近年来,随着对小金丸研究的不断深入,有关其质量控制问题及不良反应的报道逐渐增多。复杂的药物来源、多变的药材质量、不同的物料性质与特殊的生产工艺多因素综合叠加,严重影响小金丸质量的稳定可控性、均一性、一致性与临床应用的安全性、有效性,这也是传统中药制剂品质提升面临的共性瓶颈问题。文章基于理论分析与生产实践,从组方药物质量与生产工艺过程控制两大视角对小金丸的质量影响因素与风险控制点进行分析与总结,并提出改进策略与建议,以期为小金丸的品质保障提供科学依据,也为其他传统丸剂的精细制造与创新提升提供思路参考。

关键词：小金丸质量控制风险评控安全性一致性组方药物生产工艺策略