检索结果-南通市图书馆

在线全文

学校读者我要写书评

暂无评论

戴安邦与《化学通报》

化学通报 2001年第4期64卷 255-257页

作者：王治浩 <化学通报>编辑部北京100080

戴安邦，1901年4月30日生于江苏丹徒县，1999年4月17日在南京逝世。他是我国著名的化学家、教育家、编辑家和中国科学院资深院士。曾历任金陵大学化学系主任、理学院院长，南京大学化学系主任、配位化学研究所所长，中国化学会常务理事... 详细信息

戴安邦，1901年4月30日生于江苏丹徒县，1999年4月17日在南京逝世。他是我国著名的化学家、教育家、编辑家和中国科学院资深院士。曾历任金陵大学化学系主任、理学院院长，南京大学化学系主任、配位化学研究所所长，中国化学会常务理事、江苏省化学化工学会理事长，第三届全国人大代表，第五、六届全国政协委员和第25届国际配位化学会议主席等职。他是《化学》和《无机化学学报》的创始人，并任两刊总编辑、主编和《高等学校化学学报》副主编多年。在戴安邦先生诞辰100周年之际，我们非常怀念他对《化学通报》的无私奉献精神和高尚的道德风范。戴安邦亲手创办的《化学》(即现今的《化学通报》)至今已有67年历史，他先后担任该刊总编辑、总经理、常务编委、编委和顾问等职，为该刊的创建和发展呕心沥血，做出了不朽的贡献。1933年8月，在南京召开的中国化学会常务理事会上决定创办《化学》期刊。会长陈裕光是金陵大学校长，便把创刊任务交给了在该校化学系任教的戴安邦先生。当年32岁的戴先生愉快地接受了这一任务，但各方面条件都非常艰难，筹措经费、组织稿件、审定稿件、编辑加工、跑印刷厂和联系发行等工作，在创刊初期，全由他一人承担。他经常审阅和修改稿件工作到深夜，第二天照常给学生讲课，把业余时间全部用到了这个刊物上，而且觉得很有乐趣。因为他对办好刊物有一颗强烈的事业心和高度的责任感。

关键词：中国化学家戴安邦《化学通报》

Optimization Strategies of Beijing Elderly Care Service Stations Based on Questionnaire Survey Method: A Case Study of Zhanlan Road Street of Xicheng District

在线全文

学校读者我要写书评

暂无评论

Journal of Landscape Research 2024年第3期16卷 15-20,26页

作者： YUAN Shuai PENG Li wang zhihao REN Pengyu DING Yuqi North China University of Technology Beijing 100144China

4 elderly care service stations in Zhanlan Road Street,Xicheng District,Beijing are selected,and questionnaires are designed and distributed to the surrounding elderly population to understand their needs and satisfaction with the station *** observing elderly care service stations on site,the characteristics,obstacles,and shortcomings of the environment are recorded,and relevant data are collected and analyzed,such as the characteristics of the elderly population being interviewed,the planning and design data of the station environment,and the distribution of service *** overall characteristics of the spatial environment of elderly care stations are summarized,and renovation measures and optimization suggestions are provided for the current shortcomings,thereby providing some basis for the spatial design of community elderly care service stations in the future.

关键词： Old people Community elderly care service station Space renovation Optimization strategy

Spatial Pattern of Compulsory Education Resources in Shijingshan District of Beijing under the Background of Big Data

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Landscape Research 2023年第6期15卷 95-100页

作者： LIU Ping wang zhihao DING Yuqi MA Minghao REN Pengyu North China University of Technology Beijing 100144China

With the continuous development of promoting high-quality and balanced basic education and the continuous advancement of research on spatial layout of school,it aims to ensure that the public enjoys educational resources *** on 63 items of POI data of primary and secondary schools in Shijingshan District,Beijing,this study analyzes the spatial layout,degree supply,and coverage of primary and secondary schools in Shijingshan District using three spatial analysis methods:ArcGIS average nearest neighbor,kernel density analysis,and standard deviation *** results show that the spatial layout of primary and secondary schools in Shijingshan District,Beijing is characterized by overall clustering:the central region is high-density distribution,while the eastern and western parts are ***,this spatial structure continues to develop along the northwest-southeast *** the high-density population areas in the nine streets correspond to the high-density distribution of schools,the service scope of primary and secondary schools does not cover all residential areas,and the distribution of residential areas within the coverage range is *** the same time,the actual degree supply in Shijingshan District is insufficient.

关键词： POI data Spatial analysis Educational resources Coverage

Commuting Space of Primary and Secondary Schools in the Context of Child Friendly Cities:A Case Study of Bajiao Street of Shijingshan District

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Landscape Research 2024年第1期16卷 22-26,30页

作者： LIU Ping PENG Li wang zhihao CONG Jing DING Yuqi North China University of Technology Beijing 100144

With the continuous promotion of the construction of child friendly cities,the school commuting space is an important component of the construction of child friendly *** on the background of child friendly cities,the commuting space of 11 primary and secondary schools in Bajiao Street is analyzed through literature analysis and field research ***,the relevant literature on school commuting space is sorted out,and the characteristics of school commuting space are summarized,including transportation,landscape,culture,leisure,and ***,the characteristics of commuting space of primary and secondary schools in Bajiao Street are analyzed from three aspects:in front of the school gate,path space,and node *** paper aims to provide reference and guidance for the future construction of children’s walking school commuting and promote the construction of a child friendly city.

关键词： Child friendly cities School commuting space Bajiao Street Primary and secondary schools

Research Characteristics of Thermal Comfort of Urban Block Landscape Based on Knowledge Graph Analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Landscape Research 2024年第2期16卷 42-46,50页

作者： FENG Shutong PENG Li MA Minghao wang zhihao CONG Jing North China University of Technology Beijing 100144China

The landscape environment of urban blocks plays a significant role in improving the comfort of urban thermal environment and promoting green and high-quality *** 342 papers related to the research on the impact of urban block landscape environment on thermal comfort in China,collected by CNKI(China National Knowledge Infrastructure)from 2002 to 2022,are used as the research *** bibliometric statistical analysis,LLR algorithm,and cluster analysis,the current research status of the impact of urban block landscape environment on thermal comfort in China is analyzed and processed,and its external characteristics are *** the information visualization software CiteSpace,the research topics in the field of the impact of urban block landscape environment on thermal comfort are presented in the form of knowledge *** co-occurrence analysis of keywords and trend of word frequency changes,the development trends of research hotspots and cutting-edge fields of the impact of urban block landscape environment on thermal comfort are determined,hoping to provide reference for future research in this field.

关键词： Urban block landscape environment Thermal comfort CiteSpace visualization analysis Research hotspots Research frontiers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

复合方钢管混凝土短柱的轴压承载力

清华大学学报（自然科学版） 2005年第12期45卷 1596-1599,1612页

作者：王志浩成戎清华大学土木工程系结构工程与振动教育部重点试验室北京100084

用试验与数值计算方法研究了普通方钢管混凝土柱的轴压承载能力。设计了2种复合截面方钢管混凝土短柱,与普通方钢管混凝土短柱做了对比轴压试验。试验结果表明,在受压柱变形的过程中,加劲肋有效地抵抗了管壁的屈曲,加肋复合方钢管混凝... 详细信息

用试验与数值计算方法研究了普通方钢管混凝土柱的轴压承载能力。设计了2种复合截面方钢管混凝土短柱,与普通方钢管混凝土短柱做了对比轴压试验。试验结果表明,在受压柱变形的过程中,加劲肋有效地抵抗了管壁的屈曲,加肋复合方钢管混凝土柱的轴压承载力有明显提高。用数值方法对加肋复合方钢管混凝土柱的轴力应变全过程进行了计算。计算结果和试验结果吻合较好。提出了轴压承载力的简化计算方法。加劲肋是提高方钢管混凝土柱承载力的有效途径。

关键词：方钢管混凝土柱复合截面加劲肋轴压承载力数值计算

Manipulating single oxygen at Cu_(2)O-island surfaces through thermomechanical coupling

在线全文

学校读者我要写书评

暂无评论

Science China Materials 2024年第10期67卷 3288-3297页

作者： Huanhuan Yang Xiao Jiang zhihao wang Hanpu Liang Xie Zhang Pengfei Guan Materials and Energy Division Beijing Computational Science Research CenterBeijing 100193China School of Materials Science and Engineering Northwestern Polytechnical UniversityXi’an 710072China

Single oxygen diffusion event,the most favorable rate-limiting process of epitaxial Cu_(2)O oxide-island layerby-layer growth kinetics,may lead to oxygen defects due to thermomechanical ***,the formation rules of oxygen defects remain unclear,preventing the realization of controllable oxygen defects on oxide-island ***,we utilize the first-principles method to investigate the formation rules of intrinsic oxygen defects in the surface layers of prototypical metal-oxide(Cu_(2)O)surfaces under thermomechanical coupling *** establish the thermodynamic phase diagram for oxygen-defect-modulated Cu_(2)O surfaces,enabling the prediction of the growth of oxide islands during Cu oxidation,which aligns closely with in-situ environmental transmission electron microscopy(ETEM)experiment *** exploring the strain-modulated phase diagrams,we propose a potential strategy for controlling the type and concentration of oxygen defects on oxide-island *** findings provide an effective approach to theoretically understanding the oxidation process of metal surfaces,thus enabling the computational design of high-performance corrosion-resistant surfaces.

关键词： first-principles calculations Cu_(2)O-island surfaces oxygen defects biaxial strains thermodynamic phase diagram

Influence of lignin content on enzymatic saccharification of poplar wood chips by different pretreatment methods

在线全文

学校读者我要写书评

暂无评论

Journal of Bioresources and Bioproducts 2018年第3期3卷 96-100页

作者： zhihao wang Min Zhang Saisai Li Yue Zhang Qiang wang Shanshan Liu Key Lab of Paper Science and Technology of Ministry of Education Qilu University of TechnologyJinanShandong Province250353China

Bioconversion of lignocellulose to fermentable sugars is a promising approach to produce potential bio-based energy and *** is the key step to remove or delocalize lignin in lignocellulose,thus improving enzymatic saccharification *** this study,three kinds of pretreatment methods(ethanol,bisulfite and sulfate)were employed to produce substrates with various lignin contents which were subsequently subjected to biological saccharification *** showed that a lower lignin content led to a higher fermentable sugar yield based on reducing sugar release for all ***,the sulfate pretreatment improved the enzymatic saccharification efficiency in a greater extent than the *** transform infrared(FTIR)spectroscopy confirmed the structure changes during pretreatment.

关键词： Poplar wood chip Pretreatment Kappa number Enzymatic Saccharification

基于光学和SAR遥感图像融合的洪灾区域检测方法

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

雷达学报（中英文） 2020年第3期9卷 539-553页

作者：王志豪李刚蒋骁清华大学电子工程系北京100084

基于光学和合成孔径雷达(SAR)图像融合的洪灾区域检测方法可以全天候、高时效地检测洪灾区域。由于SAR图像中存在大量随机分布的相干斑噪声,传统洪灾区域检测方法的检测结果存在较高的虚警率。该文在模糊C均值聚类方法(FCM)的基础上提... 详细信息

基于光学和合成孔径雷达(SAR)图像融合的洪灾区域检测方法可以全天候、高时效地检测洪灾区域。由于SAR图像中存在大量随机分布的相干斑噪声,传统洪灾区域检测方法的检测结果存在较高的虚警率。该文在模糊C均值聚类方法(FCM)的基础上提出了分级聚类算法(H-FCM),该方法将洪灾后的SAR图像与洪灾前的光学图像融合。基于融合图像,该方法利用提出的分级聚类模型获得洪灾区域的初步检测结果。此外,该算法在利用所提出的区域生长算法获得洪灾前河流位置后,将其作为初步检测结果的空间约束,进一步筛除疑似洪灾区域,并显著地提升了检测性能。该文的实验数据包括1999年英国格洛斯特洪灾前后的遥感图像和2019年中国南昌洪灾前后的遥感图像。通过对比实验,H-FCM算法的有效性得到验证。

关键词：遥感图像融合光学合成孔径雷达分级C均值聚类算法分级聚类区域生长空间约束