检索结果-南通市图书馆

Multilevel Modeling of PM2.5 and Risk of Cardiovascular Disease and Diabetes Mellitus in Adults Aged 65 and Older

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 Geoscience and Environment Protection 2022年第7期10卷 266-278页

作者： Longjian liu Jessica Grimm Qing Wang Rose Ann DiMaria-Ghalili charles N. Haas Arthur Frank Department of Epidemiology and Biostatistics Dornsife School of Public Health Drexel University Philadelphia PA USA School of Public Health Shandong University Jinan China Department of Graduate Nursing College of Nursing and Health Professions Drexel University Philadelphia PA USA Department of Civil Architectural and Environmental Engineering College of Engineering Drexel University Philadelphia PA USA Department of Environment and Occupational Health Dornsife School of Public Health Drexel University Philadelphia PA USA

We aimed to test a hypothesis that elevated ambient particulate matter (PM) 2.5 concentrations are significantly associated with risk of coronary heart disease (CHD), stroke, and diabetes mellitus (DM) in adults aged 65 and older. We analyzed data (2010-2013) from U.S. 1118 counties to examine the association between PM2.5 concentrations and risk of prevalent CHD, stroke, and DM, and mortality from cardiovascular disease (CVD), CHD, stroke, and DM in adults aged ≥ 65. Multilevel regression analysis technique was applied to test these associations. The results show that the annual mean of PM2.5 concentration was 8.7 μg/m3 in the total study sample. Significant differences in mean PM2.5 concentrations were observed across counties and states in the U.S. Multilevel regression analysis indicates that an average annual concentration of 1 μg/m3 increase in PM2.5 concentration was significantly associated with an increased prevalence of CHD, stroke, and DM by 4.9‰ (95% CI: 3.1‰ - 6.7‰), 0.8‰ (0.5‰ - 1.1‰), and 3.3‰ (2.9‰ - 4.4‰), respectively. State-level correlation analyses indicate that increased PM2.5 concentrations were significantly associated with increased age-adjusted mortality from CVD (r = 0.76, p < 0.001), CHD (r = 0.0.40, p = 0.004), stroke (r = 0.60, p p = 0.02). In conclusion, Elevated PM2.5 concentrations were significantly associated with an increased risk of the prevalence and mortality from CVD, CHD, stroke, and DM. Continued effort to control ambient PM2.5 concentrations could play an important role in risk reduction of cardiovascular disease and diabetes in the elderly.

关键词： PM2.5 Cardiovascular Disease Coronary Heart Disease Stroke Diabetes Mellitus

On semi-global stabilization of minimum phase nonlinear systems without vector relative degrees

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 in China(Series F) 2009年第11期52卷 2153-2162页

作者： liu XinMin LIN ZongLi charles L. Brown Department of Electrical and Computer Engineering University of Virginia P.O. Box 400473 Charlottesville VA 22904-4743 USA

Recently, we developed a structural decomposition for multiple input multiple output nonlinear systems that are affine in control but otherwise general. This structural decomposition simplifies the conventional backstepping design and allows a new backstepping design procedure that is able to stabilize some systems on which the conventional backstepping is not applicable. In this paper we further exploit the properties of such a decomposition for the purpose of solving the semi-global stabilization problem for minimum phase nonlinear systems without vector relative degrees. By taking advantage of special structure of the decomposed system, we first apply the low gain design to the part of system that possesses a linear dynamics. The low gain design results in an augmented zero dynamics that is locally stable at the origin with a domain of attraction that can be made arbitrarily large by lowering the gain. With this augmented zero dynamics, backstepping design is then applied to achieve semi-global stabilization of the overall system.

关键词： nonlinear systems structural decomposition semi-global stabilization low gain feedback

大气悬浮颗粒的长途输送及其对台湾空气质量的影响(英文)

在线全文

学校读者我要写书评

暂无评论

干旱区资源与环境 2004年第S1期18卷 153-156页

作者： Shaw C. liu charles C.-K. Chou Saint-Jer Huang Chung-Ming liu Chea-Yuan Young Institute of Earth Sciences Academia Sinica Taipei Taiwan ROCInstitute of Earth Sciences Academia Sinica Taipei Taiwan ROCInstitute of Earth Sciences Academia Sinica Taipei Taiwan ROCDepartment of Atmospheric Science National Taiwan University Taiwan ROCEnvironmental Protection Agency Taipei Taiwan ROC

在线全文

学校读者我要写书评

暂无评论

模拟消落带水华暴发行为的数值沙堆模型

环境科学学报 2006年第7期26卷 1126-1134页

作者：刘信安张毅力 charles Q.Jia 重庆大学化学化工学院 Chemical Engineering & Applied Chemistry College University of Toronto CanadaM5S3E5

以长江最大支流汉江近年来水华污染的现场资料为例,通过氮磷浓度、水温、流速和光照等实测数据构建了消落带开放水域环境体系的数值沙堆模型,描述了藻类生长及水华暴发的动力学机制;利用数值沙堆系统崩塌行为反映出的频率-尺度幂律关系... 详细信息

以长江最大支流汉江近年来水华污染的现场资料为例,通过氮磷浓度、水温、流速和光照等实测数据构建了消落带开放水域环境体系的数值沙堆模型,描述了藻类生长及水华暴发的动力学机制;利用数值沙堆系统崩塌行为反映出的频率-尺度幂律关系作为判断消落带水域是否暴发水华以及规模大小的依据,采用有限尺度标度分析从不同侧面验证了水华暴发系统的自组织临界性,并揭示出各种拟合参数与水华暴发规模之间的定量关系.研究表明,沙堆模型如果存在良好的幂律关系,相应的消落带水域将暴发水华,且幂律指数越大,水华污染程度越严重.

关键词：数值沙堆模型自组织临界性消落带水域水华暴发

叶面肥对柑橘全爪螨生长发育和繁殖及柑橘苗生长的影响

在线全文

学校读者我要写书评

暂无评论

昆虫学报 2021年第9期64卷 1104-1111页

作者：刘喆 George Andrew charles BEATTIE 岑伊静徐长宝华南农业大学昆虫生态研究室/广东省生物农药创制与应用重点实验室广州510642 扬州大学园艺与植物保护学院江苏扬州225009 School of Science and Health Western Sydney University Penrith NSW 2751 Australia

【目的】柑橘全爪螨Panonychus citri在中国是一种重要的柑橘害虫,叶面肥在橘园的应用很普遍。本研究是为了明确柑橘施用尿素和复合氨基酸2种叶面肥对这种害螨生长发育和繁殖及柑橘苗生长的影响。【方法】在室内分别用尿素(0.50%)和复... 详细信息

【目的】柑橘全爪螨Panonychus citri在中国是一种重要的柑橘害虫,叶面肥在橘园的应用很普遍。本研究是为了明确柑橘施用尿素和复合氨基酸2种叶面肥对这种害螨生长发育和繁殖及柑橘苗生长的影响。【方法】在室内分别用尿素(0.50%)和复合氨基酸(0.17%)2种叶面肥喷施盆栽沙糖橘Citrus reticulata Blanco ***苗,以喷施清水为对照,探究叶面施肥对柑橘全爪螨生命表参数[净增殖率(R0)、平均代时(T)、内禀增长率(rm)、周限增长率(λ)和种群趋势指数(I)]及柑橘苗生长参数(叶长、宽和面积,茎长,株高,新梢的长度和数量)和叶片养分(N,P和K)含量的影响。【结果】柑橘全爪螨未成熟螨态的发育历期没有受到叶面肥的影响,但施用0.50%尿素的柑橘苗上第2若螨的存活率(95.40%)显著高于施用清水的对照(78.26%)和喷施0.17%复合氨基酸的处理(75.61%),其雌螨的繁殖力(42.1/♀)也显著高于对照(33.1/♀)。复合氨基酸处理柑橘苗上的雌螨寿命(19.5 d)显著长于尿素处理柑橘苗上的雌螨寿命(14.8 d)和对照(14.5 d),复合氨基酸处理柑橘苗上的雄螨寿命(17.6 d)也显著长于对照(13.1 d)。总体上,在尿素处理的柑橘苗上柑橘全爪螨的净增殖率(R0)(17.88)和种群趋势指数(I)(18.08)值最高,2个参数都显著高于对照(分别为10.08和11.17)。施用2种叶面肥显著促进了柑橘苗叶片生长(叶长、叶宽、叶面积),其N,P和K含量以及氮钾比(N/K)也显著增加。【结论】柑橘苗叶面喷施尿素和复合氨基酸都可促进柑橘苗生长,喷施尿素会导致柑橘全爪螨种群的显著增长,而喷施复合氨基酸没有导致柑橘全爪螨种群显著增长。因此,推荐使用复合氨基酸代替尿素作为柑橘的叶面肥施用。但是,喷施复合氨基酸可显著延长柑橘全爪螨成螨的寿命,所以在使用时还应该加强对其种群的监测。

关键词：柑橘全爪螨叶螨叶面肥尿素复合氨基酸柑橘生长

Crustal structure beneath Cameroon from EGM2008

在线全文

学校读者我要写书评

暂无评论

Geodesy and Geodynamics 2014年第1期5卷 1-10页

作者： Ngatchou Heutchi Evariste liu Genyou Tabod charles Tabod Kamguia Joseph Nguiya Severin Tiedeu Alain KE Xiaoping State Key Laboratory of Geodesy and Earth's Dynamics Institute of Geodesy and GeophysicsChinese Academy of Sciences Department of Physics Faculty of ScienceUniversity of Yaoundé I National Institute of Cartography Industrial Engineering Faculty University of Douala Ecole Nationale Supérieure Polytechnique Université de Yaoundé I

We used the Earth Gravitational Model （EGM2008） data sets to analyze the regional gravity anoma- lies and to study the underground structures in Cameroon. We first created a high-resolution Free-Air anomaly database, then corrected the gravity field of the topographic effect by using ETOPO1 DEM with a resolution of 0.01~ to obtain the Bouguer anomaly, then applied a multi-scale wavelet-analysis technique to separate the gravity-field components into different parts of shallow-to-deep origins, and finally used the logarithmic power spectrum technique to obtain detailed images and corresponding source depths as well as certain lateral inho- mogeneity of structure density. The anomalies of shallow origin show successive elongated gravity ＂highs＂ and ＂lows＂ attributable to subsurface Tertiary and lower Cretaceous undulations. Our results are in good agreement with previous investigations.

关键词： Cameroon EGM2008 gravity anomalies wavelet transform power spectrum crustal structure

在线全文

学校读者我要写书评

暂无评论

第一家居室

城市住宅 1998年第6期5卷 58-60页

作者： charles Fung Dick liu Pollux Design Interor Architects & Consultants

面积:55平方米(建筑面积)间隔:二室一厅遮光帘也有天使图案,是与天使窗帘挂勾一同购买的。镶在客厅木围身的幅镜子,成格子状与现时常见的镜子全墙身铺砌别有果,给人以工整、巧的观感。

关键词：遮光帘建筑面积格子状天使图案镜子平方米窗帘铺砌观感

在线全文

学校读者我要写书评

暂无评论

实用居室㈠

城市住宅 2000年第7期7卷 74-76页

作者： charles Fung Dick liu Pollux Design

关键词：墙纸壁纸图案设计师

Advanced precision modeling reveals divergent responses of hepatocellular carcinoma to combinatorial immunotherapy

在线全文

学校读者我要写书评

暂无评论

Cancer Communications 2023年第6期43卷 706-710页

作者： Jinping liu Lan Cheng Hilana El-Mekkoussi charles-Antoine Assenmacher Michelle Y.Y.Lee Danielle R.Jaffe Kaisha Garvin-Darby Ashleigh Morgan Elisabetta Manduchi Jonathan Schug Klaus H.Kaestner Department of Genetics and Center for Molecular Studies in Digestive and Liver Disease University of PennsylvaniaPhiladelphiaPAUSA Institute for Diabetes Obesity and MetabolismPerelman School of Medicine at the University of PennsylvaniaPhiladelphiaPAUSA Department of Pathobiology School of Veterinary MedicineUniversity of PennsylvaniaPhiladelphiaPAUSA

Dear Editor Combinatorial immunotherapy has provided patients with advanced hepatocellular carcinoma(HCC)the potential for long-term ***,sustained responses are seen only in a minority of patients[1].Thus,there is an unmet need for precision modeling to understand the different responses and uncover predictive biomarkers for treatment stratification.

关键词： immunotherapy hepatocellular sustained