检索结果-南通市图书馆

Design and evaluation of UHPP steel bridge deck pavement for high-temperature and rainy regions

Journal of Southeast University(English Edition) 2024年第3期40卷 257-265页

作者： Qian Zhendong Zhang Shaojin Min Yitong Zhao xinyuan Intelligent Transportation System Research Center Southeast UniversityNanjing 211189China College of Architectural Science and Engineering Yangzhou UniversityYangzhou 510000China

To enhance the serviceability of steel bridge deck pavement(SBDP)in high-temperature and rainy regions,a concept of rigid bottom and flexible top was summarized using engineering practices,which led to the proposal of a three-layer ultra-high-performance pavement(UHPP).The high-temperature rutting resistance and wet-weather skid resistance of UHPP were evaluated through composite structure *** internal temperature distribution within the pavement under typical high-temperature conditions was analyzed using a temperature field ***,a temperature-stress coupling model was employed to investigate the key load positions and stress response characteristics of the *** results indicate that compared with the traditional guss asphalt+stone mastic asphalt structure,the dynamic stability of the UHPP composite structure can be improved by up to 20.4%.Even under cyclic loading,UHPP still exhibits superior surface skid resistance compared to two traditional *** thickness composition of UHPP significantly impacts its rutting resistance and skid *** exhibits relatively low tensile stress but higher shear stress levels,with the highest shear stress occurring between the UHPP and the steel *** suggests that the potential risk of damage for UHPP primarily lies within the interlayer of the *** on engineering examples,introducing interlayer gravel and optimizing the amount of bonding layer are advised to ensure that UHPP possesses sufficient interlayer shear resistance.

关键词： steel bridge deck pavement(SBDP) high-temperature environment rainy weather rigid bottom and flexible top temperature field composite structure

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

进气弯管对离心压气机特性影响及弯管结构优化

引用

兵工学报 2021年第4期42卷 706-714页

作者：佟鼎田红艳刘欣源刘烨高超李欣中国北方发动机研究所柴油机增压技术重点实验室天津300400 河北工业大学机械工程学院天津300130

离心压气机进口常采用弯管导流进气,弯管中的二次流动会导致压气机进口气流出现畸变,影响压气机的气动性能。针对这一问题,通过数值仿真与台架试验相结合的方式,研究弯管对离心压气机特性的影响规律及产生机理。在此基础上提出在弯管内... 详细信息

离心压气机进口常采用弯管导流进气,弯管中的二次流动会导致压气机进口气流出现畸变,影响压气机的气动性能。针对这一问题,通过数值仿真与台架试验相结合的方式,研究弯管对离心压气机特性的影响规律及产生机理。在此基础上提出在弯管内增加导流肋片的改进方法,并进行数值仿真与试验验证。研究结果表明:在压气机进口增加弯管后,压比和效率特性都发生了一定程度的恶化,在大流量工况时,性能的下降尤其显著;采用内部布置导流肋片的弯管结构,能够进一步规范弯管内部气流的流动特征,改善压气机进口流动状态,使流动变得相对均匀,从而使性能得到全方位的提升。

关键词：跨声速离心压气机进气弯管导流肋片数值模拟

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

中国基础教育发展的时代理念与实践遵循

引用

教育科学 2016年第5期32卷 53-57页

作者：柳欣源杨清溪华东师范大学教育学部上海200062 长春师范大学教育科学学院吉林长春130032

教育理念是形而上的基础教育改革指导、精神引领、发展哲学或行动取向。党的十八届五中全会提出了中国经济社会发展的"五大理念",《国家中长期教育改革和发展规划纲要(2010-2020年)》确立了未来十年中国的教育发展观。本文吸收这两大文... 详细信息

教育理念是形而上的基础教育改革指导、精神引领、发展哲学或行动取向。党的十八届五中全会提出了中国经济社会发展的"五大理念",《国家中长期教育改革和发展规划纲要(2010-2020年)》确立了未来十年中国的教育发展观。本文吸收这两大文件的基本精神,阐释了当前中国基础教育应予秉持的时代理念的基本内涵及其实践遵循。这些理念是:育人为本、改革创新、素质教育、均衡发展、提高质量和开放发展。

关键词：基础教育时代理念实践遵循

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

Electronic structure engineering of single atomic sites by plasmoninduced hot electrons for highly efficient and selective photocatalysis

引用

Nano Research 2024年第8期17卷 6960-6967页

作者： Xiaoya Huang xinyuan Li Akang Chen Hongfei Gu Shouyuan Li Tailei Hou Shuwen Zhu Shuang Yu Yin Song Jiatao Zhang Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications MIIT Key Laboratory of Medical Molecule Science and Pharmaceutical EngineeringMOE Key Laboratory of Cluster ScienceSchool of Chemistry and Chemical EngineeringSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China MIIT Key Laboratory of Complex-field Intelligent Exploration School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China

Single atom(SA)catalysts have achieved great success on highly selective heterogeneous catalysis due to their abundant and homogeneous active *** electronic structures of these active sites,restrained by their localized coordination environments,significantly determine their catalytic performances,which are difficult to ***,we investigated the effect of localized surface plasmon resonance(LSPR)on engineering the electronic structures of single atomic ***,core–shell structures consisted of Au core and transition metal SAs loaded N-doped carbon(CN)shell were constructed,namely Au@M-SA/CN(M=Ni,Fe,and Co).It was demonstrated that plasmon-induced hot electrons originated from Au were directionally injected to the M-SAs under visible light irradiation,which significantly changed their electronic structures and meanwhile facilitated improved overall charge separation *** as-prepared Au@Ni-SA/CN exhibited highly efficient and selective photocatalytic CO_(2) reduction to CO performance,which is 20.8,17.5,and 6.9 times those of Au nanoparticles,Au@CN,and Ni-SA/CN,*** spectroscopy analysis and theoretical calculations confirmed that the plasmon enhanced Ni-SA/CN sites featured increased charge density for efficient intermediate activation,contributing to the superb photocatalytic *** work provides a new insight on plasmon and atomic site engineering for efficient and selective catalysis.

关键词： single atom catalysts plasmon enhancement coupling effect photocatalysis CO_(2) reduction

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

The effect on the Wnt signaling pathwayof tumor suppressor gene TSLC1 and its inhibitory actionto hepatoma carcinoma cell

The effect on the Wnt signaling pathwayof tumor suppressor g...

引用

华东六省一市生物化学与分子生物学学会2014年学术交流大会暨浙江省第十一届学会会员代表大会

作者： Panpan Huang Keni Guo Buyun Ma Rong Zhang Chang Ying xinyuan liu Yigang Wang College of Life Sciences ZhejiangSci-TechUniversity

Wnt signaling pathway is one of important intracellular signaling transduction system,and participates in the tumorigenesis,signal transduction,cell cycle control and proliferation,cell migration and differentiation,cell adhesion *** also plays an important role in embryonic development and cell *** pathway is highly conserved signal pathway,and its members are high homolog from lower organism Drosophila to *** suppressor in lung cancer 1(TSLC1)is a tumor suppressor gene recently discovered in non-small cell lung ***1 plays an important role in cell adhesion,immune surveillance,cell motility and signal transduction *** studies showed that expression of TSLC1 is loss or low level in most human cancer cells,which closely correlate with the tumorigenesis,invasion and ***,the study on molecular mechanism and intracellular signal transduction pathway of TSLC1 in liver cancer is unclear and needs to be further *** study primarily investigated the relationship between tumor suppressor TSLCl and the Wnt signal pathway,and the suppression effect to hepatoma cell of *** oncolytic adenovirus ***-E1A(A24)-TSLC1 was constructed by using the dual-targeted oncolytic adenovirus ***-E1 A(A24)to deliver TSLCl *** constructed virus was designed with replacing the endogenous promoter of E1 A with tumor-specific survivin promoter(sp),and deleting the 24bp sequence of E1 A-CR2 region to target Rb signal abnormal *** we detected the influence of TSLCl on Wnt signal pathway by the luciferase reporter assay,real-time PCR and western blotting ***,we evaluated the antitumor effect andthe safety on normal cell lines of TSLC1 by MTT and Hoechst 33342 staining ***,we used the cell scratch assay and transwell small chamber method to detect the effect on liver cancer cell migration and invasion of *** results indicated that TSLCl expression in hepatoma cell lines is significantly l

关键词： TSLC1 oncolytic adenovirus Wnt signal pathway hepatocellular carcinoma

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

关于加法补集的一个注记(英文)

引用

数学进展 2016年第4期45卷 533-536页

作者：刘鑫媛方金辉南京信息工程大学数学与统计学院南京江苏210044

设A和B是正整数集合,若它们的和A+B=a+b:a∈A,b∈B}包含所有充分大的整数,则称A,B为加法补集.本文推广了陈永高和方金辉关于加法补集的一个结论,特别证明了:存在加法补集A,B满足lim sup_(x→∞)(A(x)B(x))/x=(22)/(13),而且存在无穷多... 详细信息

设A和B是正整数集合,若它们的和A+B=a+b:a∈A,b∈B}包含所有充分大的整数,则称A,B为加法补集.本文推广了陈永高和方金辉关于加法补集的一个结论,特别证明了:存在加法补集A,B满足lim sup_(x→∞)(A(x)B(x))/x=(22)/(13),而且存在无穷多个正整数x使得A(x)B(x)-x=1.

关键词：加法补集无穷计数函数

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

Here and There

引用

China Book International 2024年第5期 116-117页

作者： Lu xinyuan 不详

This original picture book is inspired by a true story about the daily lives of A-Dan,a coffee shop owner in a small town with roots,and A-Qi,a seafaring crew member who loves to *** seemingly different lives,but in the depths of their minds,they have the same sense of *** encounter,a conversation,and a story made the two complete each other's lives and shorten the distance between themselves and the vast world.

关键词： lives roots story

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

Achieving Seconds-to-Hours Duration-Tunable Organic Long Persistent Luminescence from Carbon Dots-Based Exciplex Systems by Energy Gaps Regulation

引用

Chinese Journal of Chemistry 2024年第12期42卷 1407-1417页

作者： Yixuan Xu Kai Jiang Linger Feng xinyuan Tong Zuxu Zhou Fengshi Li Yi Zhang Jiaren Du Hengwei Lin International Joint Research Center for Photo-responsive Molecules and Materials School of Chemical and Material EngineeringJiangnan UniversityWuxiJiangsu214122China State Key Laboratory of Food Science and Resources Jiangnan UniversityWuxiJiangsu 214122China

Comprehensive Summary Duration-tunable afterglow materials have garnered considerable attention in various ***,carbon dots(CDs)-based long persistent luminescence(LPL)composites with a tunable duration in an ultrawide range of seconds-to-hours levels were designed and prepared for the first *** contrast to the established CD-based afterglow materials,we reported that CD-based composites exhibit LPL in the form of exciplexes and long-lived charge-separated states,enabling the LPL to be prolonged from several seconds to over one hour,exceeding the typical regulation range(limited to 1 min).Further studies revealed that the relationship between the excited and charge-transfer states of CDs plays a pivotal role in activating the LPL and regulating its ***,these composites exhibited high photoluminescence(PL)quantum yields of up to 60.63%,and their LPL was robust under ambient conditions,even in aqueous *** robust and superior LPL performance endows these composites with a strong competitive advantage in dynamic display systems,such as tags for time-resolved data encryption and displays of the remaining time of *** study offers an approach to preparing CDs-based LPL composites with tunable durations and may provide new insights for the development of rare-earth-free LPL materials.

关键词： Carbon dots Composites Charge separation Exciplex Persistent luminescence

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

Enhanced charge separation by incomplete calcination modified co-doped TiO_(2)nanoparticle for isothiazolinone photocatalytic degradation

引用

Nano Research 2024年第6期17卷 4834-4843页

作者： Zhiren Guo Xiao Zhang xinyuan Li Chang Cui Zilei Zhang Hansheng Li Dongxiang Zhang Jinying Li Xiyan Xu Jiatao Zhang School of Chemistry and Chemical Engineering Beijing Institute of TechnologyBeijing 102488China Department of Chemistry MSU-BIT UniversityShenzhen 517182Chin

Photocatalytic oxidation techniques are promising for degradation of the highly ecotoxic and refractory isothiazolinone bactericides in relevant industrial ***,low charge separation and directional transport efficiency under solar light radiation restrain their practical ***,we report a nanostructured photocatalyst doped with Gd and B in TiO_(2)with carbon incorporation and defect formation through incomplete *** specific surface area,grain size,and hydrophilicity of TiO_(2)are improved,which is beneficial for the interfacial reaction between the photocatalyst and *** reduction of the bandgap,the broadening of the photo-absorption range,and the retarded electron-hole recombination promote the photocatalytic performance due to the improved oxygen vacancies based on the electron distribution *** difference in partial density of states(ΔPDOS)between the current catalyst and raw TiO_(2)indicates that the co-doping of Gd and B with incomplete calcination changes the electronic hybridization of conduction band and valence band near the Fermi level,and affects the band gap *** improved charge separation and directional transport efficiency and benefited the formation of main active species,including•OH and O_(2)•−,for the pollutant *** rate of photocatalytic removal of benzisothiazolinone(BIT)by the current photocatalyst reaches 1.25 h^(−1),being 4.31 times that of TiO_(2).The current work offers a constructive approach to the design and synthesis of nanostructured photocatalysts for the photocatalytic degradation of refractory organic pollutants.

关键词： TiO_(2)nanoparticle charge separation oxygen vacancies electron distribution modification photocatalytic degradation

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

中共早期土地制度变革与革命合法性的建构

引用

湖北行政学院学报 2009年第4期 77-80页

作者：柳新元张晒武汉大学湖北武汉430072

土地制度是中国社会、经济、政治的根源,中国过去的政治改革与农民暴动在很多情况下都是与土地制度变革密切相关的。在近代中国,根据农民的需要,进行土地制度变革和颁布新的土地政策本身就蕴涵着某种意义上的合法性。中国共产党在早期... 详细信息

土地制度是中国社会、经济、政治的根源,中国过去的政治改革与农民暴动在很多情况下都是与土地制度变革密切相关的。在近代中国,根据农民的需要,进行土地制度变革和颁布新的土地政策本身就蕴涵着某种意义上的合法性。中国共产党在早期革命活动中,正是借助于土地制度变革和实施新的土地政策,建构了革命的合法性,从而赢得了广大农民的拥护与支持,并最终取得了革命的成功。

关键词：中国共产党早期的土地制度变革革命合法性建构

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：