检索结果-南通市图书馆

The Drivers of Child Mortality During the 2012–2016 Drought in La Guajira, Colombia

International Journal of Disaster Risk Science 2020年第1期11卷 87-104页

作者： Diana Contreras alex Voets Jana Junghardt Srirama Bhamidipati Sandra Contreras Research Center for Integrated Disaster Risk Management(CIGIDEN) Pontifical Catholic University of Chile7820436 MaculSantiagoChile School of Engineering Newcastle UniversityNewcastle upon TyneNorthumbria NE17RUUK Caritas Switzerland BogotaD.C.110231Colombia Caritas Switzerland 6002 Luzern LucernaSwitzerland Faculty of Technology Policy and ManagementDelft University of Technology2628 BX DelftThe Netherlands Communication and Language Pontifical Xavierian UniversityBogotaD.C.110231Colombia

During the 2012–2016 drought in La Guajira,Colombia, child mortality rates rose to 23.4 out of *** of these children belonged to the Wayuu indigenous community, the largest and one of the most vulnerable in Colombia. At the municipal level, this study found a significant positive correlation between the average child mortality rate and households with a monthly income of less than USD 100, the number of people without access to health insurance, being part of the indigenous population,being illiterate, lacking sewage systems, living in rural areas, and large households with members younger than5 years old and older than 65 years old. No correlation was found with households without access to a water *** stepwise regression analysis showed that households with a monthly income of less than USD 100, no members older than 65 years old, but several children younger than5 years old, account for 90.4% of the child mortality *** study concludes that, if inhabitants had had better incomes or assets, as well as an adequate infrastructure,they could have faced the drought without the observed increase in child mortality.

关键词： Child mortality Climate change Drought Socioeconomic vulnerability Water management Wayuu indigenous community

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

Determination of Bulk Volume of Asphalt Specimens with Image-based Modeling

引用

International Journal of Transportation Science and Technology 2013年第1期2卷 1-13页

作者： Eyal Levenberg alex Manevich Technion-Israel Institute of Technology Technion CityHaifa 32000Israel

An approach is explored for modernizing the determination of bulk density of compacted asphalt *** is based on calculating the bulk volume of the specimen in a three-dimensional model reconstructed from its *** paper presents the basics of image-based modeling,founded upon the science of photogrammetry and computer ***,a demonstrative application is described,in which a field core is photographed from many viewpoints with a consumer grade camera,and the images are combined into a sparse point *** cloud is subsequently‘meshed’with planar polygons into a closed 3D shape and its volume *** was found that the model-core volume was very close to that measured with a traditional liquid-displacement *** was also found that while the volume was relatively insensitive to the quantity and quality of the images used for the reconstruction,the computational time varied significantly from minutes to *** on the favorable findings of this limited application,the approach is deemed promising and viable,worthy of more in-depth examination.

关键词： polygon viable planar

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

PERFORMANCE EVALUATION OF THREE DIFFERENT FAÇADE MODELS FOR SUSTAINABLE OFFICE BUILDINGS

引用

Journal of Green Building 2006年第4期1卷 91-103页

作者： Matthias Haase alex Amato Hong Kong University Department of ArchitecturePokfulam RoadHong Kong

Sustainable development issues are currently the driving forces of many building *** building façade is critical for the architectural expression and has a large affect upon large parts of the building’s environmental *** study investigates the advantages of using multidimensional computer aided modeling and simulation to produce a sustainable façade design.A first step towards green building design is to establish a list of parameters which can then be used as design criteria,*** performance,thermal visual and acoustic comfort,*** simulation and an analysis of recent projects in Hong Kong can help to determine the performance according to these design parameters whilst environmental impacts due to energy consumption are considered to be an important design parameter,it is also important for comfort criteria to be considered.

关键词： OFFICE computer architectural

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

Thrust characteristics of nano-carbon/Al/oxygenated salt nanothermites for micro-energetic applications

引用

Defence Technology（防务技术） 2023年第12期30卷 55-69页

作者： Ahmed Fahd alex Baranovsky Charles Dubois Jamal Chaouki Sherif Elbasuney Shady Shokry Chemical Engineering Department Ecole Polytechnique de MontrealMontrealH3C 3A7Canada Energetic Materials and Nanotechnology Research Center Technical Research CenterCairo11765Egypt Mechanical and Mechatronics Engineering Department University of WaterlooOntarioN2L 3G1Canada Head of Nanotechnology Research Center Military Technical CollegeCairo11767Egypt Laser and Optoelectronics Research Center Technical Research CenterCairo11765Egypt

Combustion within small motors is key in the application-specific development of nanothermite-based micro-energetic systems. This study evaluates the performance of nanothermite mixtures in a converging-diverging nozzle and an open tube. Mixtures were prepared using nano-aluminum(n-Al),potassium perchlorate(KClO_(4)), and different carbon nanomaterials(CNMs) including graphene-oxide(GO), reduced GO, carbon nanotubes(CNTs) and nanofibers(CNFs). The mixtures were packed at different densities and ignited by laser beam. Performance was measured using thrust measurement,high-speed imaging, and computational fluid dynamics modeling, respectively. Thrust, specific impulse(ISP), volumetric impulse(ISV), as well as normalized energy were found to increase notably with CNM content. Two distinctive reaction regimes(fast and slow) were observed in combustion of low and high packing densities(20% and 55%TMD), respectively. Total impulse(IFT) and ISPwere maximized in the 5%GO/Al/KClO_4 mixture, producing 7.95 m N·s and 135.20 s respectively at 20%TMD, an improvement of 57%compared to a GO-free sample(5.05 m N·s and 85.88 s). CFD analysis of the motors over predicts the thrust generated but trends in nozzle layout and packing density agree with those observed experimentally;peak force was maximized by reducing packing density and using an open tube. The numerical force profiles fit better for the nozzle cases than the open tube scenarios due to the rapid nature of combustion. This study reveals the potential of GO in improving oxygenated salt-based nanothermites,and further demonstrates their applicability for micro-propulsion and micro-energetic applications.

关键词： Nanothermites Graphene oxide Reduced graphene oxide Carbon nano material Oxygenated salts Laser ignition Computational fluid dynamics

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 Review on Primary and Secondary Controls of Inverter-interfaced Microgrid

引用

Journal of Modern Power Systems and Clean Energy 2021年第5期9卷 969-985页

作者： Kafeel Ahmed Mehdi Seyedmahmoudian Saad Mekhilef N.M.Mubarak alex Stojcevski School of Software and Electrical Engineering Swinburne University of TechnologyVIC 3122VictoriaAustralia Power Electronics and Renewable Energy Research Laboratory Department of Electrical EngineeringUniversity of Malaya50603 Kuala LumpurMalaysia Department of Chemical Engineering Faculty of Engineering and ScienceCurtin University of Technology98009 SarawakMalaysia

The demand of electricity and environmental issues associated with conventional power generation plants are increasing *** technology has transformed the conventional power system through the integration of distributed generation(DG).With the help of modern power electronic technology,the conventional power system is able to support the integration of DGs based on renewable energy sources(RESs).The systematic combination of DGs with energy storage system forms a microgrid(MG),which can operate in islanded mode or grid-connected *** intermittent nature of RES and varying load pose substantial obstacles such as voltage and frequency instability,and the unreliability of *** feeder impedances and non-linear loads are considered as present challenges in MG *** control has been useful in undertaking solutions to these *** paper covers the deep insight of different control methods applied at the primary and secondary control levels in hierarchical *** primary control,the classification based on droop and non-droop controls is *** virtual synchronization machine(VSM)based control method is *** and frequency restoration control and economical operations at decentralized and centralized secondary control are analyzed in *** on the existing literature,critical discussion on MG control and future trends are also presented to provide future research perspectives.

关键词： Distributed generation(DG) hierarchical control droop control non-droop control inverter

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

Rheological properties of rare earth minerals flotation pulp in the presence of anions

引用

Journal of Rare Earths 2024年第11期42卷 2172-2182,I0007页

作者： Moonchul Jung Bogale Tadesse Craig Dick alex Logan Laurence Dyer Boris Albijanic Western Australia School of Mines Curtin UniversityKalgoorlieWA 6430Australia Lynas Rare Earths Ltd Mt Weld Elora RoadLavertonWA 6440Australia

Water quality has been found to significantly influence the flotation operations due to the alteration of surface properties of *** effect of cations on the flotation of RE minerals has been studied,however,there are still very limited information regarding the effect of *** present study examined the impact of specific anions such as Cl^(-),SO_(4)^(2-),and HCO_(3)^(-)on the flotation performance of rare earth(RE) *** study integrates flotation experiments,rheology measurements,entrainment experiments,zeta potential measurements and settling *** is observed that an increase in the concentration of these anions lead to a decrease in the recovery of RE minerals and an increase in the recovery of FeO minerals and thus negatively affecting flotation *** adverse effect is most pronounced with Cl^(-)and least noticeable with HCO_(3)^(-).An increase in the non-selective entrainment of gangue minerals is observed when the flotation pulp has higher *** reduction in the zeta potential of fine particles in the presence of these results in a higher pulp viscosity due to increased attractive forces between *** findings were verified by settling experiments and calculations based on the DLVO theory.

关键词： Flotation Rare earth ore Anions Pulp rheology Entrainment DLVO theory

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

Scleral remodelling in myopia and its manipulation:a review of recent advances in scleral strengthening and myopia control

引用

Annals of Eye Science 2018年第1期3卷 29-43页

作者： Simon Backhouse alex Gentle School of Medicine Deakin UniversityGeelongVictoriaAustralia

The biological mechanisms of eye growth and refractive development are increasingly well characterised,a result of many careful studies that have been carried out over many *** the outer coat of the eye,the sclera has the ultimate impact on the restraint or facilitation of eye growth,thus any changes in its biochemistry,ultrastructure,gross morphology and/or biomechanical properties are critical in refractive error development and,in particular,the development of *** current review briefly revisits our basic understanding of the structure and biomechanics of the sclera and how these are regulated and modified during eye growth and myopia *** review then applies this knowledge in considering recent advances in our understanding of how the mechanisms of scleral remodelling may be manipulated or controlled,in order to constrain eye growth and limit the development of myopia,in particular the higher degrees of myopia that lead to vision loss and *** doing so,the review specifically considers recent approaches to the strengthening of the sclera,through collagen cross-linking,scleral transplantation,implantation or injection of biomaterials,or the direct therapeutic targeting and manipulation of the biochemical mechanisms known to be involved in myopia *** latest approaches to the control of scleral changes in myopia are,where possible,placed in the context of our understanding of scleral biology,in order to bring a more complete understanding of current and future therapeutic interventions in myopia,and their consequences.

关键词： Myopia sclera myopia control scleral strengthening

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

Failure of levees induced by toe uplift:Investigation of post-failure behavior using material point method

引用

Journal of Rock Mechanics and Geotechnical Engineering 2023年第4期15卷 970-983页

作者： Veronica Girardi Francesca Ceccato alex Rohe Paolo Simonini Fabio Gabrieli University of Padua Department of CivilEnvironmental and Architectural EngineeringVia Ognissanti 39PaduaItaly GeoHal Graswinckelstraat 50DelftNetherlands

Levees are essential structures in flood defense systems,and their failures can lead to devastating consequences on the surrounding *** of the failure mechanisms mostly controlled by the foundation soil stratigraphy is the instability of the land side slope,triggered by the development of high uplift pressures in the *** complex phenomenon has been investigated experimentally with centrifuge tests or large-scale tests and numerically with the limit equilibrium method(LEM)and the finite element method(FEM).In this work,we applied a multiphase formulation of the material point method(MPM)to analyze the development of toe uplift instability mechanism,from the onset of failure to large *** numerical model is inspired by an experiment carried out in a geotechnical centrifuge test by Allersma and Rohe(2003).The comparison with the experiment allows for understanding critical pore pressure triggering large displacements in the foundation ***,we numerically evaluated the impact of different values of foundation soils’hydraulic conductivity on the failure *** results show that hydraulic conductivity mainly influences the time of failure onset and the extension of shear localization at ***,the advantages of using large displacement approaches in the safety assessment of earth structures are *** FEM,there are no issues with element distortions generating difficulties with numerical convergence,allowing for full postfailure *** capability permits precise quantification of earth structure damages and post-failure *** ensuing reinforcement systems’design is no longer over-conservative,with a significant reduction in associated costs.

关键词： Slopes safety assessment Levees Uplift pressure Large deformation analysis

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

The Strength of Structural Diversity in Online Social Networks

引用

Research 2021年第1期2021卷 1203-1212页

作者： Yafei Zhang Lin Wang Jonathan JHZhu Xiaofan Wang alex‘Sandy’Pentland Department of Automation Shanghai Jiao Tong University and Key Laboratory of System Control and Information ProcessingMinistry of Education of ChinaShanghai 200240China Department of Media and Communication and School of Data Science City University of Hong KongHong Kong S.A.R.China Department of Automation Shanghai UniversityShanghai 200444China Media Lab Massachusetts Institute of TechnologyCambridgeMA 02139USA

Understanding the way individuals are interconnected in social networks is of prime significance to predict their collective *** a large-scale dataset from a knowledge-sharing website,this paper presents an exploratory investigation of the way to depict structural diversity in directed networks and how it can be utilized to predict one’s online social *** capture the structural diversity of an individual,we first consider the number of weakly and strongly connected components in one’s contact neighborhood and further take the coexposure network of social neighbors into *** show empirical evidence that the structural diversity of an individual is able to provide valuable insights to predict personal online social reputation,and the inclusion of a coexposure network provides an additional ingredient to achieve that *** synthetically controlling several possible confounding factors through matching experiments,structural diversity still plays a nonnegligible role in the prediction of personal online social *** work constitutes one of the first attempts to empirically study structural diversity in directed networks and has practical implications for a range of domains,such as social influence and collective intelligence studies.

关键词： collective networks founding

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

A review on exosome-based cancer therapy

引用

Journal of Cancer Metastasis and Treatment 2020年第1期6卷 521-530页

作者： alex Von Schulze Fengyan Deng Department of Molecular and Integrative Physiology University of Kansas Medical CenterKansas CityKS 66160USA

Cancer is one of the leading causes of mortality and morbidity *** types of cancer treatments have been developed,such as chemotherapy,surgery,radiotherapy,and ***,these therapies can also kill healthy cells and lead to severe side ***,scientists are looking for new strategies to eliminate cancerous cells ***,nanometer-sized lipid bilayer-enclosed vesicles secreted from various cell types,exist in nearly all body fluids,including blood,breast milk,saliva,urine,bile,pancreatic juice,cerebrospinal,and peritoneal *** carry myriad donor cell-derived bioactive molecules such as proteins,lipids,and RNAs(including microRNA and lncRNA)and can deliver them to both nearby and distant recipient *** to these characteristics,exosomes have attracted great interest in cancer treatment(especially serving as a biological carrier for some drugs,microRNA,lncRNA,inhibitors,and antibodies).In this paper,we will review the current knowledge of exosome therapeutic applications in cancer.

关键词： Exosomes cancer cancer therapy gene carrier drug carrier

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

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：