检索结果-南通市图书馆

Exposure Response Relationship of Acute Effects of Air Pollution on Respiratory Diseases-China,2013−2018

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

China CDC weekly 2021年第45期3卷 943-947页

作者： Hongtao Niu Tao Yu Xuexin Li Hanna Wu Meilin Yan Ruirui Duan Ting Yang Department of Pulmonary and Critical Care Medicine Center of Respiratory MedicineChina-Japan Friendship HospitalBeijingChina National Center for Respiratory Medicine BeijingChina Institute of Respiratory Medicine Chinese Academy of Medical SciencesBeijingChina National Clinical Research Center for Respiratory Diseases BeijingChina Peking Union Medical College Chinese Academy of Medical SciencesBeijingChina Peking University China-Japan Friendship School of Clinical Medicine BeijingChina BIC-esat and SKL-ESPC College of Environmental Sciences and EngineeringPeking UniversityBeijingChina Center for Environment and Health Peking UniversityBeijingChina Department of Pulmonary and Critical Care Medicine The Second Hospital of Dalian Medical UniversityDalianLiaoningChina

Summary What is already known about this topic?Short-term exposure to air pollutants has been associated with chronic obstructive pulmonary disease(COPD)and asthma,which needs continuous *** is added by this report?This study uses the longest time series data so far from 2013 to 2018 and adds additional data analysis for ozone(O_(3))to existing studies.

关键词： asthma Acute ozone

Co-doped IT-M0S2 nanosheets embedded in N,S-doped carbon nanobowls for high-rate and ultra-stable sodium-ion batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2019年第9期12卷 2218-2223页

作者： Peihao Li Yong Yang Sheng Gong Fan Lv Wei Wang Yiju Li Mingchuan Luo Yi Xing Qian Wang Shaojun Guo Department of Materials Science & Engineering College of EngineeringPeking UniversityBeijing 100871China Department of Materials Science and Engineering Massachusetts Institute of TechnologyCambridgeMA 02139USA Center far Applied Physics and Technology College of EngineeringPeking UniversityBeijing 100871China BIC-esat College of EngineeringPeking UniversityBeijing 100871China

Despite various 2H-MoS/carbon hybrid nanostructures have been constructed and committed to improve the performance for sodium-ion batteries(SIBs),they still show the limited cycle stability due to the relatively large volumetric expansion during the charge-discharge process Herein,we report the construction of cobalt-doped few-layered 1T-MoS2 nanosheets embedded in N,S-doped carbon(CMS/NSC)nanobowls derived from metal-organic framework(MOF)precursor via a simple in situ sulfurization *** unique hierarchical structure enables the uniformly dispersed Co-doped 1T-MoS2 nanosheets intimately couple with the highly conductive carbon nanobowls,thus efficiently preventing the *** particular,the Co-doping plays a crucial role in maintaining the integrity of structure for MoS2 during cycling tests,confirmed by first-principles *** with pristine MoS2,the volume deformation of Co-doped MoS2 can be shrunk by a prominent value of 52%during ***,the few-layered MoS2 nanosheets with 1T metalic phase endow higher conductivity,and thus can surpass its counterpart 2H semiconducting phase in battery *** virtue of the synergistic effect of stable structure,appropriate doping and high conductivity,the resulting CMS/NSC hybrid shows superior rate capability and cycle *** capacity of CMS/NSC can still be 235.9 mAh·g^-1 even at 25 A·g^-1,which is 51.3%of the capacity at 0.2 A·g^-***,the capacity can still remain 218.6 mAh·g^-1 even over 8,240 cycles at 5 Ag·g^-1 with a low decay of 0.0044%per cycle,one of the best performances among the reportec MoS2-based anode materials for SIBs.

关键词： sodium-ion battery anode IT-MoS2 cobalt-doping metal-organic framework(MOF)

Investigation of a complete squeeze-film damping model for MEMS devices

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2021年第4期7卷 67-79页

作者： Qianbo Lu Weidong Fang Chen Wang Jian Bai Yuan Yao Jiaxiao Chen Xiang Xu Wei Huang Ningbo Institute of Northwestern Polytechnical University Frontiers Science Center for Flexible Electronics(FSCFE)MIIT Key Laboratory of Flexible Electronics(KLoFE)Shaanxi Key Laboratory of Flexible Electronics(KLoFE)Institute of Flexible Electronics(IFE)Northwestern Polytechnical University710072 Xi'anShaanxiChina College of Optical Science and Engineering State Key Laboratory of Modern Optical InstrumentationZhejiang University310027 HangzhouChina Department of Electrical Engineering and Computer Science University of LiegeLiegeBelgium esat-MNS University of Leuven3001 LeuvenBelgium Huazhong University of Science and Technology-Wuhan National Laboratory for Optoelectronics 430074 HubeiChina Huazhong Institute of Electro-Optics-Wuhan National Lab for Optoelectronics 430074 HubeiChina

Dynamic performance has long been critical for micro-electro-mechanical system(MEMS)devices and is significantly affected by *** structural vibration conditions lead to different damping effects,including border and amplitude effects,which represent the effect of gas flowing around a complicated boundary of a moving plate and the effect of a large vibration amplitude,*** models still lack a complete understanding of damping and cannot offer a reasonably good estimate of the damping coefficient for a case with both *** efforts have been undertaken to consider these two effects,yet a complete model has remained *** paper investigates the dynamic performance of vibrated structures via theoretical and numerical methods simultaneously,establishing a complete model in consideration of both effects in which the analytical expression is given,and demonstrates a deviation of at least threefold lower than current studies by simulation and experimental *** complete model is proven to successfully characterize the squeeze-film damping and dynamic performance of oscillators under comprehensive ***,a series of simulation models with different dimensions and vibration statuses are introduced to obtain a quick-calculating factor of the damping coefficient,thus offering a previously unattainable damping design guide for MEMS devices.

关键词： film complete offering

Efficient adsorption of europium(Ⅲ)and uranium(Ⅵ)by titanate nanorings:Insights into radioactive metal species

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Environmental Science and Ecotechnology 2020年第2期2卷 76-85页

作者： Maosheng Zheng Haodong Ji Jun Duan Chenyuan Dang Xingmin Chen Wen Liu The Key Laboratory of Water and Sediment Sciences Ministry of EducationCollege of Environmental Sciences and EngineeringPeking UniversityBeijing100871China The Key Laboratory of Resources and Environmental Systems Optimization Ministry of EducationCollege of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing102206China The Beijing Innovation Center for Engineering Science and Advanced Technology(BIC-esat) Peking UniversityBeijing100871China Beijing Engineering Research Center for Advanced Wastewater Treatment Department of Environmental EngineeringPeking UniversityBeijing100871China College of Environmental Science and Engineering Ocean University of ChinaQingdao266100China

Radioactive wastewater containing high concentration of radionuclides poses severe threats to ecosystem and human health,so efficient removal of these toxic heavy metals is urgently *** nanomaterials have been demonstrated good adsorbents for heavy metals due to ion exchange *** this study,titanate nanorings(TNRs)were synthesized using the facile hydrothermal-cooling *** TNRs were composed of sodium trititanate,with a chemical formula of Na_(0.66)H_(1.34)-Ti_(3)O_(7)·0.27H_(2)O and a Na content of 2.38 mmol/*** TNRs demonstrated sufficient adsorption performance to radionuclides europium(Eu)and uranium(U)***,even at a high initial concentration of 50 mg/L,86.5% and 92.6% of the two metal ions can be rapidly adsorbed by the TNRs within 5 min,and equilibrium was reached within 60 min at pH *** maximum adsorption capacity(Qmax)obtained by the Langmuir isotherm model was 115.3 mg/g for Eu(Ⅲ)and 282.5 mg/g for uranium U(Ⅵ)at pH 5,*** adsorption capacities of the two metals under various water chemical conditions were highly related to their *** exchange between metal cations and Na^(+) in the TNR interlayers was the dominant adsorption mechanism,and adsorption of U(Ⅵ)was more complicated because of the co-existence of various uranyl(UO_(2)^(2+))and uranyl-hydroxyl *** spent TNRs were effectively regenerated through an acid-base or ethylenediamine tetraacetic acid(EDTA)treatment and *** the large adsorption capacity and quick kinetic,TNRs are promising materials to remove radionuclides in environmental purification applications,especially emergent treatment of leaked radionuclides.

关键词： Titanate nanorings Ion exchange Radionuclides Species Adsorption

新生儿复温期间脑血流量和氧合作用的持续测定

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

世界核心医学期刊文摘（儿科学分册） 2005年第4期1卷 15-15页

作者： Naulaers G. Cossey V. Morren G. 平智广 Department of Paediatrics University Hospital Leuven ESAT-SCD (SISTA) Leuven Belgium

目的:调查复温对住院的低体温早产儿的治疗效果。方法:测定了8例体温<350℃的住院早产儿的组织氧合指数(TOI)、脑血流量变化(△CBV)和血管内氧合度变化(△HbD)。结果:4例患儿(A组)的HbD和TOI显著升高,另外4例患儿(B组)的CBV明显升高而Hb... 详细信息

目的:调查复温对住院的低体温早产儿的治疗效果。方法:测定了8例体温<350℃的住院早产儿的组织氧合指数(TOI)、脑血流量变化(△CBV)和血管内氧合度变化(△HbD)。结果:4例患儿(A组)的HbD和TOI显著升高,另外4例患儿(B组)的CBV明显升高而HbD降低。回顾性分析表明A组患儿曾有明显的围生期窒息征象。结论:围生期有明显窒息征象的新生儿在复温过程中其体内氧合作用明显提高,而在无窒息征象的新生儿中则没有明显改变。

关键词：氧合作用复温围生期窒息脑血流量血管内氧合氧合指数低体温 oxygenation admission 程中

Crystal-phase engineering of PdCu nanoalloys facilitates selective hydrodeoxygenation at room temperature

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

The Innovation 2022年第1期3卷 31-37页

作者： Shaopeng Li Minghua Dong Mi Peng Qingqing Mei Yanyan Wang Junjuan Yang Youdi Yang Bingfeng Chen Shulin Liu Dequan Xiao Huizhen Liu Ding Ma Buxing Han Beijing National Laboratory for Molecular Sciences Key Laboratory of Colloid and Interface and ThermodynamicsCAS Research/Education Center for Excellence in Molecular SciencesInstitute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Science University of Chinese Academy of SciencesBeijing 100049China Beijing National Laboratory for Molecular Engineering College of Chemistry and Molecular Engineering and College of EngineeringBIC-ESATPeking UniversityBeijing 100871China Center for Integrative Materials Discovery Department of Chemistry and Chemical EngineeringUniversity of New HavenWest HavenCT 06516USA

Selective hydrodeoxygenation of biomass-derived aromatic alcohols to value-added chemical or fuel is of great importance for sustainable biomass upgrading,and hydrodeoxygenation of 5-hydroxymethylfurfural(HMF)to 2,5-dimethylfuran(DMF)is one of the most attractive *** the conversion of HMF to DMF using H_(2)at ambient temperature is *** this work,we used PdCu nanoalloys to catalyze the selective hydrodeoxygenation reaction of HMF to DMF using H_(2)as the reducing *** reaction path and the product selectivity are governed by the crystallographic phase of the PdCu *** was discovered that body-centered cubic(BCC)PdCu nanoalloys supported on activated carbon(AC)exhibited outstanding performance with 93.6%yield of DMF at room temperature(PdCu/AC-BCC).A combination of experimental and density functional theory(DFT)studies showed that the tilted adsorption modes of furanic intermediates on PdCu-BCC nanoalloy surfaces accounted for the high selectivity of DMF;however,furan ring was activated on PdCu face-centered cubic(FCC)nanoalloy ***,PdCu/AC-BCC could also catalyze the hydrodeoxygenation of other aromatic alcohols at room temperature while maintaining the aromatic *** work opens the way for selective hydrodeoxygenation of the aromatic alcohols at room temperature with the aromatic ring intact.

关键词： alcohols aromatic selectivity

Description of the Cover Picture

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 Harbin Institute of Technology(New series) 2018年第5期 4-4页

作者： Wei Li Yanglong Hou Beijing Key Laboratory for Magnetoelectric Materials and Devices ( BKLMMD) Beijing Innovation Center for Engineering Science and Advanced Technology ( BIC-esat) Peking University Department of Materials Science and Engineering College of EngineeringPeking University

The cover picture is taken from the article"Review:Controllable Synthesis of Two-Dimensional（2D） MoS;by Chemical Vapor Deposition Process". Molybdenum disulfide （MoS;）,as a prototypical member of TMDs family,has drawn tremendous attention due to its great potential in a range of electronic devices in recent years. However,it is still a challenge for us to grow large-scale,single-crystalline MoS;monolayer films suitable for practical applications. Here we present in detail

关键词： Description of the Cover Picture

行走暴露于交通污染对于健康和患有心/肺疾病人群心肺系统的健康影响（英文）

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

行走暴露于交通污染对于健康和患有心/肺疾病人群心肺系统的健康...

Association of PM_(2.5)Reduction with Improved Kidney Function:A Nationwide Quasiexperiment among Chinese Adults

2017环境与公共健康学术会议暨中国环境科学学会环境医学与健康分会、中国毒理学会生化与分子毒理专业委员会2017年年会

作者： Jicheng Gong Rudy Sinharay Benjamin Barratt Pamela Ohman-Strickland Sabine Ernst Frank Kelly Junfeng(Jim) Zhang Peter Collins Paul Cullinan Kian Fan Chung College of Environmental Science and Engineering and BIC-esat Peking University Nicholas School of Environment & Duke Global Health Institute Duke University National Heart & Lung Institute & MRC-PHE Centre for Environment and Health Imperial College MRC-PHE Centre for Environment and Health King's College London

There are no data to indicate whether patients with chronic obstructive pulmonary disease(COPD) or ischemic heart disease(IHD) suffer detrimental effects when walking in areas with high air *** studied 40 healthy volunteers,40 patients with COPD and 39 with IHD andmeasured components of air pollution during each *** measured over 24 hours after each walk included respiratory symptoms,lung function,impulse oscillometry,pulse wave velocity

关键词：

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

Health Data Science 2022年第1期2022卷 115-123页

作者： Yiqun Han Tao Xue Frank J.Kelly Yixuan Zheng Yao Yao Jiajianghui Li Jiwei Li Chun Fan Pengfei Li Tong Zhu Environmental Research Group MRC Centre for Environment and HealthImperial College LondonLondonUK BIC-esat and SKL-ESPC College of Environmental Sciences and EngineeringCenter for Environment and HealthPeking UniversityBeijing 100871China Institute of Reproductive and Child Health/Ministry of Health Key Laboratory of Reproductive Health and Department of Epidemiology and Biostatistics School of Public HealthPeking UniversityBeijingChina Center of Air Quality Simulation and System Analysis Chinese Academy of Environmental Planning100012 BeijingChina China Center for Health Development Studies Peking UniversityBeijingChina College of Computer Science and Technology Zhejiang UniversityHangzhouChina Computer Center Peking University and Peng Cheng LaboratoryChina Advanced Institute of Information Technology Peking UniversityChina

*** evidence from human studies has revealed the adverse impact of ambient fine particles(PM_(2.5))on health outcomes related to metabolic disorders and distant *** exposure to ambient PM_(2.5)leads to kidney impairment remains *** rapid air quality improvement driven by the clean air actions in China since 2013 provides an opportunity for a quasiexperiment to investigate the beneficial effect of PM_(2.5)reduction on kidney *** on two repeated nationwide surveys of the same population of 5115 adults in 2011 and 2015,we conducted a difference-indifference *** in long-term exposure to ambient PM_(2.5)were associated with changes in kidney function biomarkers,including estimated glomerular filtration rate by serum creatinine(GFRscr)or cystatin C(GFRcys),blood urea nitrogen(BUN),and uric acid(UA).*** a 10μg/m^(3)reduction in PM_(2.5),a significant improvement was observed for multiple kidney functional biomarkers,including GFRscr,BUN and UA,with a change of 0.42(95%confidence interval[CI]:0.06,0.78)mL/min/1.73m^(2),-0.38(-0.64,-0.12)mg/dL,and-0.06(-0.12,-0.00)mg/dL,respectively.A lower socioeconomic status,indicated by rural residence or low educational level,enhanced the adverse effect of PM_(2.5)on kidney *** results support a significant nephrotoxicity of PM_(2.5)based on multiple serum biomarkers and indicate a beneficial effect of improved air quality on kidney function.

关键词： Kidney organs ambient