检索结果-南通市图书馆

Description of martensitic transformation kinetics in Fe-C-X(X = Ni,Cr,Mn,Si) system by a modified model

International Journal of Minerals,Metallurgy and Materials 2024年第5期31卷 1026-1036页

作者： Xiyuan Geng Hongcan Chen Jingjing Wang Yu Zhang qun luo Qian Li State Key Laboratory of Advanced Special Steels&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Ansteel Beijing Research Institute Co. LtdBeijing 102211China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China National Key Laboratory of Advanced Casting Technologies Chongqing UniversityChongqing 400044China

Controlling the content of athermal martensite and retained austenite is important to improving the mechanical properties of high-strength steels,but a mechanism for the accurate description of martensitic transformation during the cooling process must be *** present,frequently used semi-empirical kinetics models suffer from huge errors at the beginning of transformation,and most of them fail to exhibit the sigmoidal shape characteristic of transformation *** describe the martensitic transformation process accurately,based on the Magee model,we introduced the changes in the nucleation activation energy of martensite with temperature,which led to the varying nucleation rates of this model during martensitic *** to the calculation results,the relative error of the modified model for the martensitic transformation kinetics curves of Fe-C-X(X = Ni,Cr,Mn,Si) alloys reached 9.5% compared with those measured via the thermal expansion *** relative error was approximately reduced by two-thirds compared with that of the Magee *** incorporation of nucleation activation energy into the kinetics model contributes to the improvement of its precision.

关键词： Fe-C-X system martensitic transformation kinetics curve semi-empirical model nucleation activation energy

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Prediction of the thermal conductivity of Mg–Al–La alloys by CALPHAD method

引用

International Journal of Minerals,Metallurgy and Materials 2024年第1期31卷 129-137页

作者： Hongxia Li Wenjun Xu Yufei Zhang Shenglan Yang Lijun Zhang Bin Liu qun luo Qian Li State Key Laboratory of Advanced Special Steels&Shanghai Key Laboratory of Advanced Ferrometallurgy&School of Materials Science and Engineering Shanghai UniversityShanghai 200444China National Engineering Research Center for Magnesium Alloys Chongqing UniversityChongqing 400044China State Key Laboratory of Powder Metallurgy Central South UniversityChangsha 410083China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China National Key Laboratory of Advanced Casting Technologies Chongqing UniversityChongqing 400044China

Mg-Al alloys have excellent strength and ductility but relatively low thermal conductivity due to Al *** accurate prediction of thermal conductivity is a prerequisite for designing Mg-Al alloys with high thermal ***,databases for predicting temperature-and composition-dependent thermal conductivities must be *** this study,Mg-Al-La alloys with different contents of Al2La,Al3La,and Al11La3phases and solid solubility of Al in the α-Mg phase were *** influence of the second phase(s) and Al solid solubility on thermal conductivity was *** results revealed a second phase transformation from Al_(2)La to Al_(3)La and further to Al_(11)La_(3)with the increasing Al content at a constant La *** degree of the negative effect of the second phase(s) on thermal diffusivity followed the sequence of Al2La>Al3La>Al_(11)La_(3).Compared with the second phase,an increase in the solid solubility of Al in α-Mg remarkably reduced the thermal *** the basis of the experimental data,a database of the reciprocal thermal diffusivity of the Mg-Al-La system was established by calculation of the phase diagram (CALPHAD)*** a standard error of±1.2 W/(m·K),the predicted results were in good agreement with the experimental *** established database can be used to design Mg-Al alloys with high thermal conductivity and provide valuable guidance for expanding their application prospects.

关键词： magnesium alloy thermal conductivity thermodynamic calculations materials computation

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Large-Area Gravure-Printed AgNWs Electrode on Water/Oxygen Barrier Substrate for Long-Term Stable Large-Area Flexible Organic Solar Cells

引用

Chinese Journal of Chemistry 2024年第5期42卷 478-484页

作者： Hao Wang Yaqin Pan Yunfei Han Zhuo Chen Tianyu Liu Lianping Zhang qun luo Chang-Qi Ma Printable Electronics Research Center & i-Lab Suzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of Sciences (CAS)SuzhouJiangsu215123 China Nano Science and Technology Institute University of Science and Technology of China166 Ren Ai RoadSEID SIPSuzhouJiangsu215123 China

Large-area AgNWs electrodes(25 cm×10 cm)were fabricated through roll-to-roll printing on the polyvinyl alcohol(PVA)modified water and oxygen barrier *** modification of the barrier film with PVA improved the wettability of silver nanowires on the barrier films and led to the formation of homogenous large-area AgNWs *** mechanical flexibility,especially the adhesion force between the silver electrode and the barrier film substrate was dramatically improved through PVA *** efficiency of 13.51%for the flexible OSCs with an area of 0.64 cm2 was achieved based on the PET/barrier film/PVA/AgNWs *** long-term stability showed the flexible OSCs based on the PET/barrier film/PVA/AgNWs electrode have a significantly improved stability relative to the device on PET/AgNWs electrode,and comparable air stability as the rigid device with glass/ITO *** unencapsulated devices maintained nearly 50%of the original efficiency after storage for 600 h in *** a simple top encapsulation,the flexible devices remained at 60%of the initial efficiency after 2000 h in the ***,the flexible AgNWs electrode based on the barrier film would have the potential to improve the air storage stability of organic flexible solar cells.

关键词： Flexible organic solar cell AgNWs electrode Air storage stability Barrier films substrate Energy conversion Flexible electronics Interface

来源：

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

Unfolding rates of 1:1 and 2:1 complex of CX-5461 and c-MYC promoter G-quadruplexes revealed by single-molecule force spectroscopy

引用

Biophysics Reports 2024年第3期10卷 180-189页

作者： Hui Peng Yashuo Zhang qun luo Xinyu Wang Huijuan You Hubei Key Laboratory of Natural Medicinal Chemistry and Resource Evaluation School of Pharmacy Tongji Medical College Huazhong University of Science and Technology College of Physics Science and Technology Yangzhou University

CX-5461, also known as pidnarulex, is a strong G4 stabilizer and has received FDA fast-track designation for BRCA1-and BRCA2-mutated cancers. However, quantitative measurements of the unfolding rates of CX-5461-G4 complexes which are important for the regulation function of G4s, remain ***, we employ single-molecule magnetic tweezers to measure the unfolding force distributions of c-MYC G4s in the presence of different concentrations of CX-5461. The unfolding force distributions exhibit three discrete levels of unfolding force peaks, corresponding to three binding modes. In combination with a fluorescent quenching assay and molecular docking to previously reported ligand-c-MYC G4 structure, we assigned the ～69 pN peak corresponding to the 1:1（ligand:G4） complex where CX-5461binds at the G4's 5'-end. The ～84 p N peak is attributed to the 2:1 complex where CX-5461 occupies both the 5' and 3'. Furthermore, using the Bell-Arrhenius model to fit the unfolding force distributions,we determined the zero-force unfolding rates of 1:1, and 2:1 complexes to be（2.4 ± 0.9） × 10-8s-1and（1.4 ± 1.0） × 10-9s-1respectively. These findings provide valuable insights for the development of G4-targeted ligands to combat c-MYC-driven cancers.

关键词： Single-molecule G-quadruplex Magnetic tweezers Stoichiometry Force spectroscopy Pidnarulex

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Multi-site Passivation of ZnO Metal Oxides via Biomolecules for Efficient and Highly Stable Organic Solar Cells

引用

Chinese Journal of Chemistry 2024年第14期42卷 1582-1592页

作者： Irfan Ismail Maria Khalil Xiaomei Gao Xingze Chen Muhammad Jawad Rong Huang Zhiyun Li Emmanuel Acheampong Tsiwah Wei-shi Li qun luo Chang-Qi Ma i-Lab&Printable Electronics Research Center Suzhou Institute of Nano-Tech and Nano-Bionics(SINANO)Chinese Academy of Sciences(CAS)SuzhouJiangsu215123 China University of Chinese Academy of Sciences(UCAS) Beijing100040 China School of Nano-Tech and Nano-Bionics University of Science and Technology of China(USTC)HefeiAnhui230027 China Shanghai Institute of Organic Chemistry(SIOC) Chinese Academy of Sciences(CAS)Shanghai200032 China Vacuum Interconnected Nanotech Workstation(Nano-X) SuzhouJiangsu215123 China

ZnO nanoparticles(nps)among metal oxide(MOs)are proven to be essential electron transporting layers(ETLs)applied in organic solar cells(OSCs).However,intrinsic defects,interfacial charge recombination,and catalytic behavior towards the active layer restrict the applications of ZnO nps for efficient and long-term stable *** commonly available biomolecule cytidine 5'-monophosphate(CMP-OH)with phosphonic acid,its salt cytidine 5'-monophosphate disodium salt(CMP-ONa)with a phosphate group as an anchoring group and conjugated terminal functional in both analogous molecules provide carrier transfer bridge at bottom interface of the active *** theoretical investigations and characterizations have discovered the multi-site coordination of CMP-OH towards acceptor molecules and ZnO *** dual-side alignment of CMP analogous molecules hinders interfacial charge recombination and enhances charge transfer potential at ***,PM6:L8-BO-based OSCs with modified ETL obtain 18.13%efficiency,12%higher than that of unmodified *** higher efficiency,CMP-OH-based OSC devices illustrate remarkably improved thermal stability for 500 h at 85℃with 72%of initial PCE and operation stability for 2000 h with 90.1%of initial *** work reveals the passivation mechanism of multi-anchoring groups towards MOs and single-functional groups towards the active layer to optimize the interface for efficient and highly stable OSCs.

关键词： Organic solar cells Nanoparticles Nucleotides Interfacial interactions Surface chemistry Multi-site passivation

来源：

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

面向DNA甲基化修饰分析的质谱技术

引用

化学通报 2024年第1期87卷 27-35页

作者：唐朝罗群江汉大学环境与健康学院武汉430056 中国科学院化学研究所北京100190

DNA甲基化作为表观遗传修饰中一种重要的调控方式,通过调控基因的表达,从而影响机体内一系列的生物学过程。色谱-质谱法是研究DNA甲基化修饰的重要研究手段。随着对哺乳动物DNA甲基化的生物学功能的深入研究,应用于研究表观遗传修饰的... 详细信息

DNA甲基化作为表观遗传修饰中一种重要的调控方式,通过调控基因的表达,从而影响机体内一系列的生物学过程。色谱-质谱法是研究DNA甲基化修饰的重要研究手段。随着对哺乳动物DNA甲基化的生物学功能的深入研究,应用于研究表观遗传修饰的手段与仪器设备越来越先进。为了对DNA修饰进行定性与定量的分析检测,除了高效液相色谱整合不同种类质量分析器的质谱联用(HPLC-MS)技术外,目前还开发应用了基质辅助激光解析质谱技术(MALDI-ToF-MS)和气相色谱-质谱联用技术(GC-MS),从而极大拓展了DNA甲基化修饰研究的手段。本文对分析表观遗传DNA甲基化修饰的质谱技术发展进行综述,希望为DNA甲基化修饰分析提供有价值的研究策略。

关键词：表观遗传修饰 DNA甲基化同位素标记液相色谱与质谱联用技术

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

元素俘获测井在页岩储层古沉积环境辨识中的应用

引用

核技术 2024年第7期47卷 65-78页

作者：李斌董振国罗群韩山师范学院潮州521014 神华地质勘查有限责任公司北京102211 中国石油大学北京102249

元素俘获测井可以获取地层中的岩石元素含量,为了查明页岩气储层发育和展布规律,以中扬子地区保靖区块寒武统牛蹄塘组首口页岩气参数井—BY2井为研究对象,通过对伽马元素俘获测井仪(Gamma Elemental Mineralogical Analysis Logging Too... 详细信息

元素俘获测井可以获取地层中的岩石元素含量,为了查明页岩气储层发育和展布规律,以中扬子地区保靖区块寒武统牛蹄塘组首口页岩气参数井—BY2井为研究对象,通过对伽马元素俘获测井仪(Gamma Elemental Mineralogical Analysis Logging Tool,GEM)资料的解释和处理,获取精准的页岩储层元素组成及含量,建立牛蹄塘组地球化学指标剖面,利用元素地球化学指标开展古沉积环境的辨识和反演。研究结果表明:牛蹄塘组页岩中元素以Si、Al、Fe为主,少量的K、Ca、Mg、S等,页岩中Si、Fe、S等元素含量较高,页岩可压性较好;牛蹄塘组页岩属活动大陆边缘沉积,沉积物源岩的原始物质应来自西北端康滇古陆,基本为活动大陆构造带、有热液参与的正常沉积;牛蹄塘组上段沉积期气候干燥,为缺氧的滞留盆地边缘缓坡沉积,水体盐度高,陆源供给充分,古生产力低下;牛蹄塘组下段沉积期气候湿润,为深水滞留型盆地沉积,陆源供给不足,水体盐度较高,具有较高的古生产力,有利于有机质的形成,水体环境以贫氧相为主,有利于有机质保存,为页岩气形成和富集的有利沉积环境。

关键词：页岩储层元素测井解释处理地球化学沉积环境

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

革命·建设·发展·治理——中国共产党边疆认知与边疆话语的百年流变

引用

中国边疆史地研究 2024年第1期34卷 1-16,213页

作者：罗群邓旭云南大学历史与档案学院昆明市650091

中国共产党的边疆话语植根于党对边疆问题的深刻认知与长期实践。在中国革命、社会主义建设、改革发展、迈向新时代国家治理的历史进程与实践中,边疆的含义、地位、功能和历史角色不断煊变,党对边疆的认知也不断发展。随着时代语境和党... 详细信息

中国共产党的边疆话语植根于党对边疆问题的深刻认知与长期实践。在中国革命、社会主义建设、改革发展、迈向新时代国家治理的历史进程与实践中,边疆的含义、地位、功能和历史角色不断煊变,党对边疆的认知也不断发展。随着时代语境和党自身理论与实践的发展、完善,党的边疆话语也愈加全面、立体,由原来的“革命宣传型话语”转变为“建设实践型话语”“发展改革型话语”“治理建构型话语”,并通过不断的实践反馈和制度革新,引领理论创新。

关键词：中国共产党边疆认知边疆话语

来源：

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

“为政在人”:民国时期云南边政人员研究

引用

思想战线 2024年第4期50卷 82-96页

作者：罗群张燕舞云南大学历史与档案学院云南昆明650091

在民国开发边疆、改革边政的共识与努力下,从中央到地方,强化边疆行政管理,颁行政策法规,设立各级边疆行政机构,任用边地行政人员,着眼于推进边政建设与边疆开发的现代化。边政人选关系民心向背及国防外交,而云南地方政府在对边政人员... 详细信息

在民国开发边疆、改革边政的共识与努力下,从中央到地方,强化边疆行政管理,颁行政策法规,设立各级边疆行政机构,任用边地行政人员,着眼于推进边政建设与边疆开发的现代化。边政人选关系民心向背及国防外交,而云南地方政府在对边政人员的选拔任用、考绩奖惩、监督管理中既遵从中央政令,又具有鲜明的边地特色,经历了由地方自主向中央主导的转变,展现了边疆内地化进程中政治整合与统一下的融合关系与特点。

关键词：边政边地行政人员 “为政在人”

来源：

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

中华优秀传统文化与职业院校思政教育的融合研究——以文化自信视角为例

引用

湖北开放职业学院学报 2024年第11期37卷 104-105,108页

作者：罗群六安职业技术学院思政部安徽六安237011

在职业院校思政课程的落实上,以中华传统优秀文化进行融合,能够改变教学方式,也可以提升教学实效。但是,在实践中如果未迎合时代发展进行观念更新,必然会导致存有诸多问题。对此,只有做到以时代发展为前提,积极应对时代发展带来的挑战,... 详细信息

在职业院校思政课程的落实上,以中华传统优秀文化进行融合,能够改变教学方式,也可以提升教学实效。但是,在实践中如果未迎合时代发展进行观念更新,必然会导致存有诸多问题。对此,只有做到以时代发展为前提,积极应对时代发展带来的挑战,改变传统教学思维,使中华优秀传统文化的渗透更加全面,才能在关注学生专业技能培养的同时,使学生的综合素质得以提升,真正使思政教育的落实发挥积极作用。

关键词：职业院校思政课程中华优秀传统文化

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：