检索结果-南通市图书馆

A multicenter uroflowmetry study of healthy women in China

中华医学杂志(英文版) 2024年第10期137卷 1225-1227页

作者： liu xiaodong Meng Lingfeng Wang Jiawen Ma Tianming Shi Benkang Huang Hai Wang Qingwei Chen Min Liao Limin Shen Hong Wei Zhongqing Xiao Yuansong Pan Tiejun Ren Jian Zhang Peng Tian Xiaojun Zhang Yaoguang Department of Urology The Second Affiliated Hospital of Nanjing Medical University Nanjing Jiangsu China Department of Urology General Hospital of Southern Theatre Command Guangzhou Guangdong China Department of Urology General Hospital of Central Theatre Command Wuhan Hubei China Department of Urology China-Japan Friendship Hospital Beijing China Department of Urology Beijing Chao-Yang Hospital Beijing China Department of Urology Peking University Third Hospital Beijing China Department of Urology Beijing Hospital National Center of Gerontology Institute of Geriatric Medicine Chinese Academy of Medical Sciences &amp Peking Union Medical College Beijing China Graduate School of Peking Union Medical College Beijing China Department of Urology Qilu Hospital Shandong University Jinan Shandong China Department of Urology SUN YAT-SEN Memorial Hospital Guangzhou Guangdong China Department of Urology The First Affiliated Hospital of Zhengzhou University Zhengzhou Henan China Department of Urology Tongji Hospital Tongji Medical College of Huazhong University of Science and Technology Wuhan Hubei China Department of Urology China Rehabilitation Research Center Beijing China Department of Urology West China Hospital Chengdu Sichuan China

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

MEIC-global-CO_(2):A new global CO_(2)emission inventory with highly-resolved source category and sub-country information

引用

Science China Earth Sciences 2024年第2期67卷 450-465页

作者： Ruochong XU Dan TONG Qingyang XIAO Xinying QIN Cuihong CHEN liu YAN Jing CHENG Can CUI Hanwen HU Wenyu liu Xizhe YAN Huaxuan WANG xiaodong liu Guannan GENG Yu LEI Dabo GUAN Kebin HE Qiang ZHANG Department of Earth System Science Ministry of Education Key Laboratory for Earth System ModelingInstitute for Global Change StudiesTsinghua UniversityBeijing100084China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Chinese Academy of Environmental Planning Beijing100041China Institute for Carbon Neutrality Tsinghua UniversityBeijing100084China

CO_(2)emission inventory provides fundamental data for climate research and emission mitigation.Currently,most global CO_(2)emission inventories were developed with energy statistics from International Energy Agency(IEA)and were available at country level with limited source categories.Here,as the first step toward a high-resolution and dynamic updated global CO_(2)emission database,we developed a data-driven approach to construct seamless and highly-resolved energy consumption data cubes for 208 countries/territories,797 sub-country administrative divisions in 29 countries,42 fuel types,and 52 sectors,with the fusion of activity data from 24 international statistics and 65 regional/local statistics.Global CO_(2)emissions from fossil fuel combustion and cement production in 1970–2021 were then estimated with highly-resolved source category(1,484 of total)and sub-country information(797 of total).Specifically,73%of global CO_(2)emissions in 2021 were estimated with sub-country information,providing considerably improved spatial resolution for global CO_(2)emission accounting.With the support of detailed information,the dynamics of global CO_(2)emissions across sectors and fuel types were presented,representing the evolution of global economy and progress of climate mitigation.Remarkable differences of sectoral contribution were found across sub-country administrative divisions within a given country,revealing the uneven distribution of energy and economic structure among different regions.Our estimates were generally consistent with existing databases at aggregated level for global total or large emitters,while large discrepancies were observed for middle and small emitters.Our database,named the Multiresolution Emission Inventory model for Climate and air pollution research(MEIC)is publicly available through http://*** with highly-resolved information and timely update,which provides an independent carbon emission accounting data source for climate research.

关键词： CO_(2)emissions Data-driven approach Highly-resolved source category Sub-country information

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

Recent Advances of Stable Phenoxyl Diradicals

引用

Chemical Research in Chinese Universities 2023年第2期39卷 170-175页

作者： ZHANG Hanjun MIAO Fang liu xiaodong WANG Dongsheng ZHENG Yonghao School of Optoelectronic Science and Engineering University of Electronic Science and Technology of China(UESTC)Chengdu610054P.R.China Institute of Electronic and Information Engineering of UESTC in Guangdong Dongguan523808P.R.China

Organic radicals with unpaired electrons have shown great semiconducting properties with potential applications in the field of organic photodetectors,organic light-emitting diodes and organic spintronics.A major problem for limiting radicals from laboratory research to practical applications is the relatively low chemical and physical stabilities.Therefore,the right selection of radical core is the key to meaningful scientific research.Phenoxyl radical is one of the few stable radicals with spin distribution properties.Moreover,phenoxyl diradicals provide extract stability due to multiple resonance structures.Due to the long-distance spin distribution,which makes phenoxyl diradicals show interesting electronic and magnetic properties.In this review,we summarize the progress of phenoxyl diradicals in recent years in terms of syntheses,properties and future perspective.

关键词： Phenoxyl Diradical Conjugation Stability

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

Efficient and fair coin mixing for Bitcoin

引用

High Technology Letters 2022年第3期28卷 259-271页

作者：龚循武 HU Bin liu xiaodong ZHAO Xiaofang Institute of Computing Technology Chinese Academy of SciencesBeijing 100190P.R.China University of Chinese Academy of Sciences Beijing 100049P.R.China Institute of Intelligent Computing Technology Chinese Academy of SciencesSuzhou 215000P.R.China

Bitcoin transactions are pseudo-anonymous,which can be exploited to reveal a user’s private information.To eliminate this threat,this paper presents FairMixer,a highly secure and efficient Bitcoin mixing system using the trusted execution environments(TEEs).With the TEE’s confidentiality and integrity guarantees for code and data,FairMixer enables a correct and privacy-preserving mixing process.However,a TEE-based implementation cannot prevent the manipulation of inputs to the mixer,such as mixing request submissions and blockchain feeds.Against this background,FairMixer captures users’ mixing requests via Bitcoin transactions for deterring a malicious service provider from dropping benign participants.To constrain misbehavior during a mixing mission,a misconduct monitoring mechanism and a penalty mechanism are introduced.The proposed scheme is fully compatible with Bitcoin and forces mixes to be accountable.Finally,a prototype of FairMixer is provided using Intel Software Guard Extensions(SGX) and its performance is evaluated in the Bitcoin Testnet.FairMixer mixes 700 inputs in just 8.39 s,which outperforms most existing decentralized mixers.

关键词： coin mixing trusted execution environment(TEE) blockchain accountable anonymity

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

A Multifunctional {P_(2)Mo_(5)}-based Hybrid Applying to Catalysis, Electrocatalysis and Dye Adsorption

引用

Chemical Research in Chinese Universities 2022年第6期38卷 1553-1560页

作者： liu xiaodong WANG Xiangchen XU Na ZHANG Zhong LI Xiaohui liu Guocheng WANG Xiuli Liaoning Professional Technology Innovation Center of Liaoning Province for Conversion Materials of Solar Cell College of Chemistry and Materials EngineeringBohai UniversityJinzhou121013P.R.China

As a common environmental pollutant, thioether can cause serious environmental pollution, so selective oxidation of thioether has become one of the current research hotspots. In this paper, an inorganic-organic hybrid based on a Standberg-type polyoxometalate, [Hbiz]_(5)[HP_(2)Mo_(5)O_(23)]·5H_(2)O(1)(biz=benzimidazole), was obtained by adjusting pH under hydrothermal conditions. The structure was characterized by infrared spectroscopy, thermogravimetric analysis, and single-crystal X-ray diffraction. Compound 1 can be used as an excellent catalyst for the oxidation of thioanisole. The experimental results showed that thioanisole could be catalytically oxidized to methyl phenyl sulfoxide by compound 1 as a catalyst within 40 min. The conversion rate and selectivity reached 99%. Compound 1 had good cycling stability as a heterogeneous catalyst. In addition, the electrocatalytic reduction of H_(2)O_(2) and Cr_(2)O_(7)^(2−) for hybrid 1 was preliminarily investigated. In addition, the adsorption performance of hybrid 1 on cationic dye crystal violet and methylene blue was tested, and the adsorption efficiencies can reach 98.5% and 86.3%, respectively.

关键词： Polyoxometalate Catalysis Electrocatalysis Dye adsorption

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

模分复用系统中的CPR-MIMO-CMA研究

引用

光学学报 2024年第5期44卷 69-76页

作者：杨步高田凤刘小东北京邮电大学电子工程学院信息光子学与光通信国家重点实验室天地互联与融合北京市重点实验室北京100876 北京安科慧生科技有限公司北京101102

针对模分复用系统中由于模式耦合引入的信道串扰(XT)的问题,提出一种基于信号相关峰提取的XT相关比测量方法,并将XT相关系数应用于多进多出恒模盲均衡算法(CPR-MIMO-CMA)中以提升信道均衡效果。搭建了少模光纤传输的实验平台,利用CPR-MI... 详细信息

针对模分复用系统中由于模式耦合引入的信道串扰(XT)的问题,提出一种基于信号相关峰提取的XT相关比测量方法,并将XT相关系数应用于多进多出恒模盲均衡算法(CPR-MIMO-CMA)中以提升信道均衡效果。搭建了少模光纤传输的实验平台,利用CPR-MIMO-CMA对接收端数据进行处理,研究结果表明,在满足前向纠错(FEC)为3.8×10^(-3)的门限下,所提出的CPR-MIMO-CMA在LP01、LP11、LP21三模信道中比传统CMA分别具有1.3 dB、0.9 dB、1.0 dB的性能增益,并且3个模式下的平均收敛时间减少约50%。

关键词：光通信模分复用模间串扰信号相关峰模式均衡

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

新主流电视剧对中国国家形象的呈现与建构

引用

艺术传播研究 2024年第1期 121-127页

作者：刘晓东山东农业大学公共管理学院

国家形象是国家文化软实力的重要表征,这一点已成为全球共识。文艺作品对塑造国家形象的功用巨大。新主流电视剧所建构的丰富、立体且兼具写实质感的中国国家形象,已经成为中国发展历程与成就的生动剪影。而研究其样态呈现及建构路径,... 详细信息

国家形象是国家文化软实力的重要表征,这一点已成为全球共识。文艺作品对塑造国家形象的功用巨大。新主流电视剧所建构的丰富、立体且兼具写实质感的中国国家形象,已经成为中国发展历程与成就的生动剪影。而研究其样态呈现及建构路径,则既要基于文化强国战略对当下电视剧创作展开考察,也要尝试针对电视剧提升国际传播能力和传播效能的具体实践做出梳理。同时,面对当前复杂变幻的国际局势和以中国式现代化全面推进中华民族伟大复兴的时代背景,新主流电视剧中的中国国家形象在表意方式的更新、想象边界的建立等方面亦存在提升空间,值得继续探讨。

关键词：新主流电视剧国家形象理念新释新塑经典

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

Response of Vegetation in the Qinghai-Tibet Plateau to Global Warming

引用

Chinese Geographical Science 2007年第2期17卷 151-159页

作者： XU Weixin liu xiaodong Institute of Earth Environment Chinese Academy of Sciences Xi ＇an 710075 China MeteorologicalInstitute of Qinghai Province Xining 810001 China Graduate University of Chinese Academy of Sciences Beijing 100049 China

Using satellite-observed Normalized Difference Vegetation Index (NDVI) dada and station-observed surface air temperature anomalies for the Northern Hemisphere (NH), we analyze the spatio-temporal characteristics of vege- tation variations in the Qinghai-Tibet Plateau and their correlations with global warming from 1982 to 2002. It is found that the late spring and early summer (May-June) are the months with the strongest responses of vegetation to global warming. Based on the Rotated Empirical Orthogonal Function (REOF) method, the study shows that the first REOF spatial pattern of average NDVI for May-June reveals the northern and southern zones with great inter-annual variations of vegetation, the northern zone from the eastern Kunlun Mountains to the southwestern Qilian Mountain and southern zone from the northern edge of the Himalayas eastward to the Hengduan Mountains. The vegetation, especially grassland, in the two zones increases significantly with global warming, with a correlation coefficient of 0.71 between the first REOF of May-June vegetation and the April-May surface air temperature anomaly in the NH during 1982-2002. A long-term increasing trend in May-June vegetation for the plateau region as a whole is also attributed mainly to global warming although there are considerable regional differences. The areas with low NDVI (grassland and shrubland) usually respond more evidently to global warming, especially since the 1990s, than those with moderate or high NDVI values.

关键词： NDVI REOF 青藏高原植被全球升温生态

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

Carbon isotope ratios of n-alkanoic acids: new organic proxies for paleo-productivity in Antarctic ponds

引用

Advances in Polar Science 2023年第4期34卷 304-317页

作者： CHEN Xin JIN Jing NIE Yaguang ZHANG Jifeng DONG Liang HUANG Xianyu Steven DEMSLIE liu xiaodong Anhui Province Key Laboratory of Polar Environment and Global Change School of Earth and Space SciencesUniversity of Science and Technology of ChinaHefei 230026China School of Oceanography Shanghai Jiao Tong UniversityShanghai 200030China Key Laboratory for Polar Ecosystem and Climate Change of Ministry of Education School of OceanographyShanghai Jiao Tong UniversityShanghai 200030China Information Materials and Intelligent Sensing Laboratory of Anhui Province Institutes of Physical Science and Information TechnologyAnhui UniversityHefei 230601China Research Center for Ecology College of ScienceTibet UniversityLhasa 850000China Key Laboratory of Polar Science MNRPolar Research Institute of ChinaShanghai 200136China Hubei Key Laboratory of Critical Zone Evolution School of Geography and Information EngineeringChina University of GeosciencesWuhan 430078China Department of Biology and Marine Biology University of North CarolinaWilmingtonNC 28403USA

Primary productivity in the Antarctic aquatic environment with simple ecosystems is sensitive to climate and environmental fluctuations.We investigatedδ13C values for n-alkanoic acids derived from phototrophic organisms in a lacustrine sediment core(IIL3)to indicate primary productivity in ponds on Inexpressible Island in the western Ross Sea,Antarctica.Short-chain n-alkanoic acids(C14–C18)were abundant in the IIL3 sediment profile.The carbon isotope ratios of short-chain n-alkanoic acids in the sediment samples and floating microbial mats were similar,indicating that the short-chain n-alkanoic acids in the IIL3 sediment profile predominantly originated from phototrophic organisms.Theδ13C values for the short-chain n-alkanoic acids varied widely through the sediment profile,and 13C-enrichment of n-alkanoic acids was most likely related to high productivity due to carbon-limited conditions caused by enhanced photosynthetic efficiency.Theδ13C values for the n-alkanoic acids changed over the past 3200 years in similar ways to organic proxies for aquatic productivity(n-alkanoic acid and sterol sedimentary fluxes).C16 n-alkanoic acid was enriched in 13C in periods of high aquatic productivity~750–1650 and 3000–3200 a BP but depleted in 13C in periods of relatively low productivity~150–600 and 2500–3000 a BP.The results indicated that carbon isotope ratios of lipids from phototrophic organisms could be used as new proxies to reconstruct paleo-productivity in Antarctic lakes and ponds and therefore improve our understanding of past climate changes.

关键词： East Antarctica lipid biomarkers carbon isotopic ratios pond primary productivity climate change

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

高精度煤质成分快速定量分析LIBS系统研究

引用

光学精密工程 2024年第10期32卷 1470-1480页

作者：刘树林王猛李安张颖刘晓东刘瑞斌西安科技大学机械工程学院陕西西安710054 北京理工大学物理学院北京100081

煤质成分的快速、高精度定量分析是工厂对能源高效利用的重要环节。本文通过利用搭建的激光诱导击穿技术煤质快速分析仪,对所采集煤样工业特性固定碳(FixC),灰分(Ash),干燥无灰基的挥发分(Vdaf),热值(Q)进行了定量测量,并对测得的数据... 详细信息

煤质成分的快速、高精度定量分析是工厂对能源高效利用的重要环节。本文通过利用搭建的激光诱导击穿技术煤质快速分析仪,对所采集煤样工业特性固定碳(FixC),灰分(Ash),干燥无灰基的挥发分(Vdaf),热值(Q)进行了定量测量,并对测得的数据与实验室人工测量数据进行对比分析,检验得出该方法在煤质分析方面准确快速。通过对设备稳定性和动态精密度的测试,结果表明了快速煤质分析仪具有较高的稳定性,满足国标规定值。在预测灰分值分布跨度为5%~60%的煤样时,通过增加样品量,增加模型中对大灰分煤样的预测权重,实现预测均方根误差RMSEP<1%的预测精度,挥发分和全硫的RMSEP<1%,热值的RMSEP<0.18 MJ/kg。预测结果均达到工业分析要求,可以满足工业现场的应用需求,具有应用于煤质在线检测方面的广阔前景。

关键词：激光诱导击穿光谱定量分析快速煤质分析稳定性

来源：

维普期刊数据库

同方期刊数据库博看期刊评论

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：