检索结果-南通市图书馆

Enhanced Electrical Properties of Bi_(2−x)Sb_(x)Te_(3)Nanoflake Thin Films Through Interface Engineering

在线全文

学校读者我要写书评

暂无评论

Energy & Environmental Materials 2024年第6期7卷 359-366页

作者： Xudong Wu Junjie Ding wenjun Cui Weixiao Lin Zefan Xue Zhi Yang Jiahui Liu Xiaolei Nie Wanting Zhu Gustaaf Van Tendeloo Xiahan Sang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China NRC(Nanostructure Research Centre) Wuhan University of TechnologyWuhan 430070China EMAT(Electron Microscopy for Materials Science) University of AntwerpGroenenborgerlaan 171Antwerp 2023Belgium

The structure–property relationship at interfaces is difficult to probe for thermoelectric materials with a complex interfacial *** thermoelectric materials with a simple,structurally-uniform interface provides a facile way to understand how these interfaces influence the transport ***,we synthesized Bi_(2−x)Sb_(x)Te_(3)(x=0,0.1,0.2,0.4)nanoflakes using a hydrothermal method,and prepared Bi_(2−x)Sb_(x)Te_(3)thin films with predominantly(0001)interfaces by stacking the nanoflakes through spin *** influence of the annealing temperature and Sb content on the(0001)interface structure was systematically investigated at atomic scale using aberration-corrected scanning transmission electron *** and Sb doping facilitate atom diffusion and migration between adjacent nanoflakes along the(0001)*** such it enhances interfacial connectivity and improves the electrical transport *** reactions create new interfaces that increase the scattering and the Seebeck *** to the simultaneous optimization of electrical conductivity and Seebeck coefficient,the maximum power factor of the Bi_(1.8)Sb_(0.2)Te_(3)nanoflake films reaches 1.72 mW m^(−1)K^(−2),which is 43%higher than that of a pure Bi_(2)Te_(3)thin film.

关键词： Bi_(2)Te_(3)nanoflakes interface engineering scanning transmission electron microscopy thermoelectric thin film

Enlarged DNA unwinding by Nme2Cas9 permits a broadened base editing window beyond the protospacer

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

Science China(Life Sciences) 2024年第2期67卷 424-427页

作者： Ziting Chen Xiangyang Li Qian Zhang wenjun Sun Xiaoxuan Song Xia Zhang Xingxu Huang Bo Sun School of Life Science and Technology and Gene Editing Center ShanghaiTech UniversityShanghai 201210China Zhejiang Lab HangzhouZhejiang 311121China CAS Center for Excellence in Molecular Cell Science Shanghai Institute of Biochemistry and Cell BiologyChinese Academy of SciencesShanghai 200031China University of Chinese Academy of Sciences Beijing 100049China

Dear Editor,Base editing has been developed to be one of the effective CRISPR-based gene editing techniques(Rees and Liu,2018).Base editors(BEs)take advantage of DNAmodifying enzymes fused with a catalytically impaired CRISPR protein to install base *** BE,DNA-modifying enzymes often process nontarget singlestranded DNA(NTS)generated by Cas proteins.

关键词： install base winding

Characteristics of rural domestic sewage discharge and their driving mechanisms: evidence from the Northern Region, China

在线全文

学校读者我要写书评

暂无评论

Frontiers of Environmental Science & Engineering 2024年第7期18卷 47-58页

作者： Jianguo Liu Ziyu Zhou Pengyu Li Zixuan Wang Ying Yan Xuezheng Yu Wenkai Li Tianlong Zheng Yingnan Cao wenjun Wu Wenqian Cai Zhining Shi Junxin Liu Key Laboratory of Environmental Pollution Control and Remediation at Universities of Inner Mongolia Autonomous Region College of Resources and Environmental EngineeringInner Mongolia University of TechnologyHohhot 010051China State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China SCEGC No.12 Construction Engineering Group Co. Ltd.Ankang 725000China State Environmental Protection Key Laboratory of Environmental Planning and Policy Simulation Chinese Academy of Environmental PlanningBeijing 100041China Technical Centre for Soil Agriculture and Rural Ecology and EnvironmentMinistry of Ecology and EnvironmentBeijing 100012China Sustainable Infrastructure and Resource Management(SIRM) UniSA STEMUniversity of South AustraliaSouth AustraliaMawson LakesSA 5095Australia

The traits of rural domestic sewage emission are unclear,negatively affecting rural domestic sewage treatment and sewage *** study used data from the Second National Pollution Source Census Bulletin to establish a data *** spatial distribution characteristics and main factors influencing rural sewage discharge in the Northern Region were studied using spatial autocorrelation analysis and structural *** findings demonstrated that(l)a significant Spearman correlation between drainage water volume(DwV),chemical oxygen demand(COD),ammonia nitrogen(NH_(3)-N),total nitrogen(TN),and total phosphorus(TP)and that the correlation coefficients between DWV and COD,NH,-N,TNand TP were 0.87**,1.0**,0.99**,0.99**,respectively;(2)rural sewage discharge showed spatial autocorrelation,and rural domestic sewage discharge in the districts and counties with an administration was significantly higher than in the surrounding areas;and(3)social development was the main driver rural domestic sewage changes(path coefficient was 0.407**),and the main factors influencing rural domestic sewage discharge were the urbanization rate,years of education,and population age *** study obtained the spatial variation law and clarified the main influencing factors of rural domestic sewage to provide data support and a theoretical basis for subsequent rural sewage collection and *** of the Inner Mongolia Autonomous Region in northern China as a typical case,provides a theoretical foundation for scientific decision-making on rural domestic sewage treatment at the national and regional levels and offers new perspectives for managing pollutants.

关键词： Rural domestic sewage Emission characteristics Spatial autocorrelation analysis Influencing factors

风景名胜区社区的价值认知及调控规划——以阳河国家级风景名胜区为例

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

中国城市林业 2017年第3期15卷 30-34,38页

作者：张琳邓文君同济大学建筑与城市规划学院上海200092

社区发展是风景名胜区规划和管理的重要问题,对社区价值进行全面、科学、系统的认知,直接关系到风景区规划管理的方法和途径。文中以阳河国家级风景名胜区为例,从生活价值、游憩价值、保护价值等3个方面建立了风景区社区价值评价的指... 详细信息

社区发展是风景名胜区规划和管理的重要问题,对社区价值进行全面、科学、系统的认知,直接关系到风景区规划管理的方法和途径。文中以阳河国家级风景名胜区为例,从生活价值、游憩价值、保护价值等3个方面建立了风景区社区价值评价的指标体系,将社区的价值特征与风景区生态敏感性、景观资源重要性进行用地叠加分析,有针对性地提出风景区社区调控的类型,并结合经济发展引导规划提出切实可行的调控措施。通过资源保护、游憩利用与社区发展3个方面的有机融合和相互促进,实现风景名胜区的可持续发展。

关键词：风景名胜区规划社区价值评价

青少年时间管理倾向与自我和谐发展及相关研究

在线全文

学校读者我要写书评

暂无评论

中国健康心理学杂志 2008年第5期16卷 531-534页

作者：邓文君傅宏南京师范大学心理系中国中国210097

目的对青少年时间管理倾向与自我和谐进行初步的相关性研究,以探讨在时间管理倾向的3个维度:时间价值感、时间监控观和时间效能感上对自我和谐的影响。方法通过分层取样的方法,采用"时间管理倾向量表"(TMD)和"自我和谐量表"对不同年龄层... 详细信息

目的对青少年时间管理倾向与自我和谐进行初步的相关性研究,以探讨在时间管理倾向的3个维度:时间价值感、时间监控观和时间效能感上对自我和谐的影响。方法通过分层取样的方法,采用"时间管理倾向量表"(TMD)和"自我和谐量表"对不同年龄层的152名青少年施测。结果时间价值感的高低与自我和谐无显著相关,而时间监控观与时间效能感对自我和谐有显著影响。结论时间管理作为一项动力性人格特征,是影响自我和谐的一个因素。

关键词：青少年时间管理倾向自我和谐

An ensemble machine learning model to uncover potential sites of hazardous waste illegal dumping based on limited supervision experience

在线全文

学校读者我要写书评

暂无评论

Fundamental Research 2024年第4期4卷 972-978页

作者： Jinghua Geng Yimeng Ding wenjun Xie Wen Fang Miaomiao Liu Zongwei Ma Jianxun Yang Jun Bi State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023 China

With the soaring generation of hazardous waste(HW)during industrialization and urbanization,HW illegal dumping continues to be an intractable global *** in developing regions with lax regulations,it has become a major source of soil and groundwater *** dominant challenge for HW illegal dumping supervision is the invisibility of dumping sites,which makes HW illegal dumping difficult to be found,thereby causing a long-term adverse impact on the *** to utilize the limited historic supervision records to screen the potential dumping sites in the whole region is a key challenge to be *** this study,a novel machine learning model based on the positive-unlabeled(PU)learning algorithm was proposed to resolve this problem through the ensemble method which could iteratively mine the features of limited historic *** of the random forest-based PU model showed that the predicted top 30%of high-risk areas could cover 68.1%of newly reported cases in the studied region,indicating the reliability of the model *** novel framework will also be promising in other environmental management scenarios to deal with numerous unknown samples based on limited prior experience.

关键词： Hazardous waste Illegal dumping site Positive-unlabeled machine learning Probability prediction Model interpretation

Atomic-resolution Interfacial Microstructure and Thermo-electro-magnetic Energy Conversion Performance of Gd/Bi0.5Sb1.5Te3 Composites

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

Energy & Environmental Materials 2024年第4期7卷 355-363页

作者： Chengshan Liu Wenjie Xu Ping Wei Shaoqiu Ke wenjun Cui Longzhou Li Dong Liang Xianfeng Ye Tiantian Chen Xiaolei Nie Wanting Zhu Wenyu Zhao Qingjie Zhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory

Thermo-electro-magnetic materials with simultaneously large magnetocaloric(MC) and thermoelectric (TE) effects are the core part for designing TE/MC all-solid-state cooling *** MC phase with TE material is an effective ***,the elemental diffusion and chemical reaction occurring at the two-phase interfaces could significantly impair the cooling performance.

关键词： interfacial reaction magnetocaloric performance thermoelectric performance thermo-electro-magnetic materials

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

犁压-切削工艺制备纯铜槽形带材的研究

现代制造工程 2020年第6期 5-10页

作者：邹银辉邓文君范显琪何迪华南理工大学机械与汽车工程学院广州510640

金属车削加工中往往会产生大量的切屑,造成资源浪费与环境污染。现有的切屑回收工艺大多针对已成形的切屑进行回收再利用,工艺繁琐,经济性差。作为一种新的切屑回收工艺,犁压-切削(Ploughing-Cutting,PC)工艺可以在正常车削过程中,将切... 详细信息

金属车削加工中往往会产生大量的切屑,造成资源浪费与环境污染。现有的切屑回收工艺大多针对已成形的切屑进行回收再利用,工艺繁琐,经济性差。作为一种新的切屑回收工艺,犁压-切削(Ploughing-Cutting,PC)工艺可以在正常车削过程中,将切屑直接转变为具有工业价值的槽形带材,生产效率高,回收成本低。采用控制变量法,在不同的切削速度vc、进给量f与刀具前角γo下,对T2纯铜管材分别采用PC工艺和传统切削(Traditional Cutting,TC)工艺进行了车削对比试验,并且探究了两者切屑的成形效果及工件被加工面的表面粗糙度。试验结果表明:2种工艺的切屑塑性变形程度及工件被加工面的表面粗糙度均随着切削速度vc与刀具前角γo的增大而减小,随着进给量f的增大而增大,采用PC工艺制备的槽形带材表面具有裂纹、褶皱等丰富的亚结构,在热交换领域具有潜在的应用价值;因此,PC工艺具有很大的发展潜力。

关键词：金属车削切屑回收犁压-切削槽形带材

基于教务管理系统的数据分析工具的研究与设计

在线全文

学校读者我要写书评

暂无评论

中国电化教育 2014年第5期 138-143页

作者：邓文俊曹阳波刘英群程建钢清华大学教育研究院教育技术研究所北京100084

基于大数据的学习分析受到越来越多的关注,但能够直接用于教育教学实践的分析技术和工具则非常有限。随着教育信息化发展,高校普遍应用了综合教务管理系统,积累了大量的数据。该文收集并分析了教学管理者最迫切的数据分析需求,选择了常... 详细信息

基于大数据的学习分析受到越来越多的关注,但能够直接用于教育教学实践的分析技术和工具则非常有限。随着教育信息化发展,高校普遍应用了综合教务管理系统,积累了大量的数据。该文收集并分析了教学管理者最迫切的数据分析需求,选择了常用的数据分析方法,设计并实现了一个基于教务管理系统的数据分析工具系统。该系统由统计分析工具集、数据计算方法模块、分析结果可视化模块三个部分组成,其中统计分析工具集包含学生、教师、师生比、教师工作量和成绩分析等方面的七个常用工具。应用该系统对某高校教务管理系统中16年的数据进行分析,结果验证了数据分析工具对于教务管理者的决策支持价值,体现了嵌入教学系统的数据分析工具的优势。

关键词：教务管理系统数据分析工具大数据分析决策支持