检索结果-南通市图书馆

Evaluation of the Bioavailability of Metals in Sediment from the Southern Coastal Wetland of the Qiantang Estuary by Using Diffusive Gradients in Thin Films Technique

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Ocean University of China 2022年第2期21卷 375-387页

作者： FENG Weihua WANG Zhifu ZHU Wenzhuo ZHENG Fangqin zhang dongrong XU Hengtao Key Laboratory of Engineering Oceanography Second Institute of OceanographyMNRHangzhou 310012China College of Marine Science&Technology Zhejiang Ocean UniversityZhoushan 316022China

Metal pollution has become an major issue governing the wetland ecosystem *** southern coastal wetland of the Qiangtang Estuary are facing unusual perturbation due to rapid development along the embayment in recent *** study evaluated the bioavailability of metals(Cu,Pb,Cd,Cr and Zn)in the sediment of the southern coastal wetland of the Qiangtang Es-tuary using diffusive gradients in thin films(DGT)techniques and compared with several methods based on total metal *** results showed that the contents of Cr,Pb,Cd and Cu in sediment,as detected using DGT,were considerably correlated with the exchangeable fraction and the content in Phragmites australis roots,while a weak correlation was observed for ***,DGT analysis could be used to evaluate the bioavailability and potential risk of Cr,Cd,Pb and Cu for *** indices,such as DGT concentration,bioaccumulation in ***,geoaccumulation index(Igeo)and potential ecological risk index(RI),revealed that Cd was a major potential ecological risk factor along the southern coast wetland of the Qiantang Estuary,especially in the upstream region,which is potentially more vulnerable to the anthropogenic pollution.

关键词： diffusive gradients in thin films estuarine wetland metal bioavailability

Responding of zooplankton to environmental factor changes in the Changjiang River estuarine regions in spring-summer from 2016 to 2020

在线全文

学校读者我要写书评

暂无评论

Journal of Oceanology and Limnology 2024年第2期42卷 544-559页

作者： Jieqing YANG dongrong zhang Yuange CHEN Longling OUYANG Yangyang YANG Jin ZHOU Yunrong SHI East China Sea Fisheries Research Institute Chinese Academy of Fishery SciencesKey Laboratory of East China Sea Fishery Resources ExploitationMinistry of Agriculture and Rural AffairsShanghai 200090China Key Laboratory of Engineering Oceanography Second Institute of OceanographyMinistry of Natural ResourcesHangzhou 310012China College of Marine Ecology and Environment Shanghai Ocean UniversityShanghai 201306China

The estuarine areas are under frequent influence from freshwater intrusion and ocean currents,in which zooplankton species are diversified and variable as they are sensitive to physio-chemical variations in ***,understanding the relationships between zooplankton and environmental factors help us know the water *** achieve co-existence with species in similar ecological group or habit,they could inevitably alter themselves to fit the ecology and adjust the function according to the competitive exclusion in ecological ***,information of the co-existence of dominant species in the Changjiang(Yangtze)River estuary(CRE)and adjacent waters remains *** explored the relationships between dominant zooplankton and environmental factors in the study region in spring-summer from 2016 to 2020,involving particularly the composition of dominant species,ecological groups,their relationships with environmental factors,and co-existence of important species,using the non-multidimensional scale analysis(nMDS)method and redundancy *** show that Labidocera euchaeta and Tortanus vermiculus were dominant species in the study *** turnover rate of dominant zooplankton was greater(>50%)in spring while the species number was higher in *** dominant species were estuarine,offshore,and eurytopic based on the adaptation to *** spring,the ecological groups were dominated by estuarine species,while in summer by estuarine and offshore *** addition,the nMDS showed that the dominant species in the same ecological group were more dispersed and not prominently clustered;the dominant species were staggered among different ecological *** temperature,salinity,pH,dissolved oxygen,and chlorophyll a were the main environmental factors on the distribution of the dominant species in spring,while in summer were dissolved oxygen,temperature,salinity,and *** domination of medusae of Nemopsis bachei and Pleurobrachia globosa in zo

关键词： Changjiang River estuary(CRE) zooplankton dominant species ecological group environmental factor co-existence

Developing institutional repositories network:Taking IR Grid at Chinese Academy of Sciences as an example

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Library and Information Science 2011年第Z1期4卷 24-34页

作者： Zhongming ZHU dongrong zhang Lin LI Jianxia MA Xiwen LIU National Science Library Lanzhou BranchChinese Academy of Sciences National Science Library Beijing HeadquartersChinese Academy of Sciences

This paper introduces the current practice of building a network of institutional repositories(IRs) at Chinese Academy of Sciences(CAS), which is named CAS IR *** Science Library(NSL) of CAS plays a leading role in the construction, promotion and implementation of CAS IR Grid. It aims to promote each institute of CAS to build IR of its own, and finally form the IR network of CAS institutes. NSL's experience is introduced in coordinating and supporting institutes' building of their respective IRs and promoting IR services by adopting collaborative and progressive development strategies. Achievements made during the development of CAS IR Grid are described and challenges for its future development are discussed. The authors aim to provide best practices for developing a network of institutional repositories in research institute settings, which can serve as a practical reference to other institutions engaged in the similar task.

关键词： Institutional repository(IR) Institutional repositories network Knowledge asset management Chinese Academy of Sciences(CAS)

科技智库的社会经济数据需求及其建设模式案例分析

在线全文

学校读者我要写书评

暂无评论

图书情报工作 2015年第11期59卷 98-105页

作者：李纯张冬荣中国科学院文献情报中心北京100190 中国科学院大学北京100049

[目的/意义]从科技智库的需求出发,研究社会经济数据对其发展建设及影响力发挥的重要意义。[方法/过程]参考宾夕法尼亚大学2014 Global Go to Think Tank Index Report中的科技智库排行以及哈佛大学图书馆"Think Tank Search"智库名录资... 详细信息

[目的/意义]从科技智库的需求出发,研究社会经济数据对其发展建设及影响力发挥的重要意义。[方法/过程]参考宾夕法尼亚大学2014 Global Go to Think Tank Index Report中的科技智库排行以及哈佛大学图书馆"Think Tank Search"智库名录资源,提取4个典型科技智库,采用案例分析方法对比分析各科技智库对社会经济数据需求和建设的现状与差异。[结果/结论]以实证阐明社会经济数据是提升科技智库影响力不可或缺的重要研究资源,并提出可供借鉴的社会经济数据建设方案。

关键词：智库科技智库智库建设社会经济数据

新时期图书情报档案管理学生就业能力提升路径研究——基于CMES-LIS的模型

在线全文

学校读者我要写书评

暂无评论

图书馆工作与研究 2021年第9期 111-119页

作者：刘惠张冬荣中国科学院文献情报中心

针对目前图情档人才培养面临的市场需求端与人才供给端之间存在的阶段性矛盾挑战,本文采用文献调研法和归纳分析法,结合人力资本理论、社会资本理论和信号传递理论,对图书情报档案管理学生就业能力体系进行深入解析;基于经典就业能力模... 详细信息

针对目前图情档人才培养面临的市场需求端与人才供给端之间存在的阶段性矛盾挑战,本文采用文献调研法和归纳分析法,结合人力资本理论、社会资本理论和信号传递理论,对图书情报档案管理学生就业能力体系进行深入解析;基于经典就业能力模型的综合比对分析,构建图情档学生的就业能力结构CMES-LIS复合模型;根据该模型框架对图情档人才新时期就业能力的要求,从学科教育、培养模式和理论体系3个角度为未来图情档人才培养的发展方向提供一些建议参考。

关键词：图书情报档案管理就业能力人才培养教育变革学科转型

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

第二代学科馆员与学科化服务

图书情报工作 2008年第2期52卷 6-10,68页

作者：初景利张冬荣中国科学院国家科学图书馆北京100080

在分析学科化服务背景的基础上,提出第二代学科馆员的概念,阐释了两代学科馆员在服务地点、服务的逻辑起点、服务深度、服务内容、服务的责任、角色定位和服务手段等方面的区别,从实践中总结国家科学图书馆在建立基于第二代学科馆员的... 详细信息

在分析学科化服务背景的基础上,提出第二代学科馆员的概念,阐释了两代学科馆员在服务地点、服务的逻辑起点、服务深度、服务内容、服务的责任、角色定位和服务手段等方面的区别,从实践中总结国家科学图书馆在建立基于第二代学科馆员的学科化服务方面的探索,包括战略目标、战略任务和措施、服务要求、管理保障和服务效果。

关键词：学科馆员第二代学科馆员学科化服务国家科学图书馆

专业图书馆学科馆员组织模式探讨——以中国科学院文献情报中心学科馆员制度建设为例

在线全文

学校读者我要写书评

暂无评论

图书情报工作 2005年第1期49卷 112-114页

作者：张冬荣姜晓岗中国科学院文献情报中心北京100080

概述学科馆员制度的发展现状;与高校图书馆相比,指出中国科学院文献情报中心开展学科馆员制度建设面临的问题,阐述建立学科馆员制度的原则,并从组织模式的定位、组织模式的机构设置两个方面重点分析基于这种模式的学科馆员制度建设方略。

关键词：学科馆员制度组织模式专业图书馆中国科学院文献情报中心

在线全文

学校读者我要写书评

暂无评论

高精度平台式惯导系统的实现

弹箭与制导学报 2011年第3期31卷 59-62页

作者：张东荣叶斌党进西北工业大学自动化学院西安710072

惯导系统的导航精度随着导航时间的增加而增加,其中惯性测量元件是影响惯导系统的主要因素。旋转调制技术能够在现有惯性元件精度的条件下大幅提高系统导航性能,是提高惯导系统长时间导航精度的主要方法之一。文中在国产平台式标准惯导... 详细信息

惯导系统的导航精度随着导航时间的增加而增加,其中惯性测量元件是影响惯导系统的主要因素。旋转调制技术能够在现有惯性元件精度的条件下大幅提高系统导航性能,是提高惯导系统长时间导航精度的主要方法之一。文中在国产平台式标准惯导系统的基础上,通过改进算法和方位施矩回路,将由惯性测量元件水平方向上随时间发散误差量调制为常值误差,并通过阻尼进行消除,从而实现系统的高精度性能。仿真和试验验证结果表明,文中所设计的系统达到了预期的目的,具有较好的实用价值。

关键词：平台式惯导系统方位旋转惯性测量元件陀螺漂移

An H_2O flare in GGD25

在线全文

学校读者我要写书评

暂无评论

Chinese Science Bulletin 2001年第1期46卷 35-39页

作者： XU Ye, ZHENG Xingwu JIANG dongrong, zhang Fujun& YU Zhiyao1. Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China 2. Chinese National Observatories, Chinese Academy of Sciences, Beijing 100080, China 3. Department of Astronomy, Nanjing University, Nanjing 210093, China Shanghai Astronomical Observatory Chinese Academy of Sciences Shanghai China Chinese National Observatories Chinese Academy of Sciences Beijing China Department of Astronomy Nanjing University 210093 China

We report the observing results of a short time scale monitoring of the 22 GHz water maser emission in GGD25. A rapid water maser outburst with the time scales of 4 d has been detected, and the variations are accompanied by some changes in the line width. The time variations were probably caused by a collision pump which led to changes in the pump input.

关键词： interstellar masers (ISM) individual GGD25 masers.