检索结果-南通市图书馆

Assessing environmental impacts of urban growth using remote sensing

Geo-Spatial Information Science 2020年第1期23卷 20-39页

作者： john trinder Qingxiang Liu School of Civil and Environmental Engineering University of NSWSydneyAustralia

This paper provides a study of the changes in land use in urban environments in two cities,Wuhan,China and western Sydney in *** mixed pixels are a characteristic of medium resolution images such as Landsat,when used for the classification of urban areas,due to changes in urban ground cover within a pixel,Multiple Endmember Spectral Mixture Analysis(MESMA)together with Super-Resolution Mapping(SRM)are employed to derive class fractions to generate classification maps at a higher spatial resolution using an Artificial Neural Network(ANN)predicted Wavelet *** images over the two cities for a 30-year period,are classified in terms of vegetation,buildings,soil and *** classifications are then processed using Indifrag software to assess the levels of fragmentation caused by changes in the areas of buildings,vegetation,water and soil over the 30 *** extents of fragmentation of vegetation,buildings,water and soil for the two cities are compared,while the percentages of vegetation are compared with recommended percentages of green space for urban areas for the benefit of health and well-being of *** in Ecosystem Service Values(ESVs)resulting from the urbanization have been assessed for Wuhan and *** UN Sustainable Development Goals(SDG)for urban areas are being assessed by researchers to better understand how to achieve the sustainability of cities.

关键词： Urban classification Multiple Endmember Mixture Analysis(MESMA) Super-Resolution Mapping(SRM) fragmentation of urban areas urban sustainability Sustainable Development Goals(SDG) Ecosystem Service Values(ESV)

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

Mapping landslide susceptibility at the Three Gorges Reservoir, China, using gradient boosting decision tree,random forest and information value models

引用

Journal of Mountain Science 2020年第3期17卷 670-685页

作者： CHEN Tao ZHU Li NIU Rui-qing trinder C john PENG Ling LEI Tao Institute of Geophysics and Geomatics China University of GeosciencesWuhan 430074China Geomatics Technology and Application key Laboratory of Qinghai Province Xining 810001China School of Civil and Environmental Engineering The University of New South WalesSydneyNSW 2052Australia China Institute of Geo-Environment Monitoring Beijing 100081China School of Electronical and Information Engineering Shaanxi University of Science and TechnologyXi’an 710021China

This work was to generate landslide susceptibility maps for the Three Gorges Reservoir(TGR) area, China by using different machine learning models. Three advanced machine learning methods, namely, gradient boosting decision tree(GBDT), random forest(RF) and information value(InV) models, were used, and the performances were assessed and compared. In total, 202 landslides were mapped by using a series of field surveys, aerial photographs, and reviews of historical and bibliographical data. Nine causative factors were then considered in landslide susceptibility map generation by using the GBDT, RF and InV models. All of the maps of the causative factors were resampled to a resolution of 28.5 m. Of the 486289 pixels in the area,28526 pixels were landslide pixels, and 457763 pixels were non-landslide pixels. Finally, landslide susceptibility maps were generated by using the three machine learning models, and their performances were assessed through receiver operating characteristic(ROC) curves, the sensitivity, specificity,overall accuracy(OA), and kappa coefficient(KAPPA). The results showed that the GBDT, RF and In V models in overall produced reasonable accurate landslide susceptibility maps. Among these three methods, the GBDT method outperforms the other two machine learning methods, which can provide strong technical support for producing landslide susceptibility maps in TGR.

关键词： Mapping landslide susceptibility Gradient boosting decision tree Random forest Information value model Three Gorges Reservoir

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

Iron:An emerging factor in colorectal carcinogenesis

引用

World Journal of Gastroenterology 2010年第6期16卷 663-672页

作者： Anita CG Chua Borut Klopcic Ian C Lawrance john K Olynyk Debbie trinder Debbie trinder School of Medicine and PharmacologyThe University of Western AustraliaFremantle Hospital Western Australian Institute for Medical Research Fremantle Hospital The Centre for Inflammatory Bowel Diseases Fremantle Hospital

The carcinogenic potential of iron in colorectal cancer(CRC) is not fully *** is able to undergo reduction and oxidation,making it important in many physiological *** inherent redox property of iron,however,also renders it toxic when it is present in ***-mediated generation of reactive oxygen species via the Fenton reaction,if uncontrolled,may lead to cell damage as a result of lipid peroxidation and oxidative DNA and protein *** may promote carcinogenesis through increased genomic instability,chromosomal rearrangements as well as mutations of proto-oncogenes and tumour suppressor genes. Carcinogenesis is also affected by inflammation which is exacerbated by *** studies indicate an association between high dietary iron intake and CRC *** this editorial,we examine the link betweeniron-induced oxidative stress and inflammation on the pathogenesis of CRC.

关键词： Iron Haem Colorectal cancer Oxidative stress Inflammation Haemochromatosis

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

Liver iron transport

引用

World Journal of Gastroenterology 2007年第35期13卷 4725-4736页

作者： Ross M Graham Anita CG Chua Carly E Herbison john K Olynyk Debbie trinder School of Medicine and Pharmacology Fremantle HospitalUniversity of Western AustraliaFremantleWestern AustraliaAustralia School of Medicine and Pharmacology Fremantle HospitalUniversity of Western AustraliaFremantleWestern AustraliaAustralia Western Australian Institute for Medical ResearchNedlandsWestern AustraliaAustralia

The liver plays a central role in iron metabolism. It is the major storage site for iron and also expresses a complex range of molecules which are involved in iron transport and regulation of iron homeostasis. An increasing number of genes associated with hepatic iron transport or regulation have been identified. These include transferrin receptors （TFRI and 2）, a ferrireductase （STEAP3）, the transporters divalent metal transporter-1 （DMT1） and ferroportin （FPN） as well as the haemochromatosis protein, HFE and haemojuvelin （HJV）, which are signalling molecules. Many of these genes also participate in iron regulatory pathways which focus on the hepatic peptide hepcidin. However, we are still only beginning to understand the complex interactions between liver iron transport and iron homeostasis. This review outlines our current knowledge of molecules of iron metabolism and their roles in iron transport and regulation of iron homeostasis.

关键词： Liver Iron homeostasis Iron uptake Iron release Iron transporters Hereditary haemochromatosis

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

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

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：