A method for extracting anomaly map of Au and As using combination of U-statistic and Euclidean dist

来源 :中南大学学报(英文版) | 被引量 : 0次 | 上传用户:joyancy_baby
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Quantitative descriptions of geochemical patts and providing geochemical anomaly map are important in applied geochemistry. Several statistical methodologies are presented in order to identify and separate geochemical anomalies. The U-statistic method is one of the most important structural methods and is a kind of weighted mean that surrounding points of samples are considered in U value determination. However, it is able to separate the different anomalies based on only one variable. The main aim of the presented study is development of this method in a multivariate mode. For this purpose, U-statistic method should be combined with a multivariate method which devotes a new value to each sample based on several variables. Therefore, at the first step, the optimump is calculated inp-norm distance and then U-statistic method is applied onp-norm distance values of the samples becausep-norm distance is calculated based on several variables. This method is a combination of efficient U-statistic method and p-norm distance and is used for the first time in this research. Results show thatp-norm distance ofp=2 (Euclidean distance) in the case of a fact that Au and As can be considered optimizedp-norm distance with the lowest error. The samples indicated by the combination of these methods as anomalous are more regular, less dispersed and more accurate than using just the U-statistic or other nonstructural methods such as Mahalanobis distance. Also it was observed that the combination results are closely associated with the defined Au ore indication within the studied area. Finally, univariate and bivariate geochemical anomaly maps are provided for Au and As, which have been respectively prepared using U-statistic and its combination with Euclidean distance method.
其他文献
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
关于吴楚七国之乱的战略指导问题,学术界现有研究成果很多。而本文则是立足于军事地理,侧重从人文地理的角度对吴楚七国之乱双方军事战略进行的一次再研究。  进行一场战争,考
今注《北史》集校勘和注释为一体,充分利用古今的研究成果、考古和新发现的史料,创造出一整套代表当代学术水准的、权威的现代善本。  今注《北史》以百衲本为底本,宋本、
京剧是中国戏曲的代表性剧种,是中国戏曲艺术发展的高峰。  清代乾嘉(1736-1820)时期,文人士大夫崇尚的昆曲艺术受到了新兴戏曲声腔的冲击,这些声腔种类繁多,被统称为“花部”
二零一四年金枫十月,北京市建筑设计研究院有限公司(BIAD)迎来了六十五周年华诞。六十五年来,BIAD在不同历史时期以不胜枚举的设计作品,记录了中国城市建筑发展的历程,也奠定
期刊
1933年7月15日,《申报月刊》发行了“中国现代化问题”特辑,共收录了26篇文章,包括10篇小短文和16篇专论。这是中国历史上首次对中国现代化问题展开的讨论。本文在对“现代化”
本文通过对荣华二采区10
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥
17、18世纪是英国的重要发展时期。伦敦是全国的政治、经济、文化和贸易中心,也是国内外各类人最为集中的地方,当然也是饮品零售场所种类最多、最集中的地点,因此研究伦敦的饮品
期刊