REGRESSION ON MULTIVARIATE IMAGES:PRINCIPAL COMPONENT REGRESSION FOR MODELING,PREDICTION AND VISUAL DIAGNOSTIC TOOLS     

PAUL GELADI Research Group for Chemometries  University of Ume  S- Ume  Sweden  Center for Peat Research Box  S- Ume  SwedenKIM ESBENSEN Norwegian Computing Center  PB  Blindern  N- Oslo  Norway 《地理学报(英文版)》1991,(2)

Regression between two blocks(usually called‘dependent’or Y and‘independent’or X)of data is a veryimportant scientific and data-analytical tool.Regression on multivariate images is possible and constitutesa meaningful addition to existing univariate and multivariate techniques of image analysis.The regressioncan be used as a modeling tool or for prediction.The form of the regression equation chosen is dependentupon problem specification and information at hand.This paper describes the use of principal componentregression(PCR).Both model building and prediction are presented for continuous Y-variables.The finalgoal is to supply new image material that can be used for visual inspection on a screen.Also,visual toolsfor diagnosis of model and prediction are provided,often based on derived image material.Examplesof modeling and prediction are given for six channels in a seven-channel satellite image  相似文献   

关于我国生产力宏观布局“西进”和“东回”战略转移的评价     

邬翊光 《云南地理环境研究》1990,2(2):1-7

本文对我国40年来生产力宏观布局几次大的变化,特别是60—70年代“西进”和近十年“东回”战略,进行了总体评价。作者肯定了“西进”战略决策的成绩,并就“东回”战略转移中存在的问题提出了自己的看法。指出在新的形势下认真总结我国生产力布局的历史经验和教训,具有重要的理论和现实意义。  相似文献   

用PANDA对GPS和CHAMP卫星精密定轨   总被引：5，自引：3，他引：2  

赵齐乐  刘经南  葛茂荣  施闯  杜瑞林 《大地测量与地球动力学》2005,25(2):113-117

介绍了武汉大学自主研制的卫星导航系统综合处理软件PANDA；利用全球45个IGS站以及CHAMP卫星星载GPS数据．在不同条件下分别实现了GPS卫星的精密定轨．以及CHAMP卫星和GPS导航星座联合精密定轨。结果与IGS的最终精密星历以及GFZ提供的CHAMP卫星精密轨道的比较说明：PANDA软件求解的GPS导航星座和CHAMP卫星轨道精度处于同等水平。  相似文献   

影响准东西向切变线运动的一些因子分析     

许习华 《成都信息工程学院学报》1987,(2)

本文认为江淮切变线是由于纬向风的不连续切变形成涡层的表现形式,且呈准东西向。对此涡层的分析得到一些关系到切变线移动的因素。  相似文献   

计算机多元统计在渔船主要参数分析中的应用     

李华祥  揣华建 《广东海洋大学学报》1989,(Z1)

本文用多元统计方法在计算机上对我国目前广泛使用的36种漁船作了对应分析和动态聚类分析。其中9个指标为CB、Cp、Cw、L/B、L/D、B/D、B/T、VF/LBD和P/△。漁船被聚成三类。其中参数P/△、VF/LBD对聚类起最大作用。  相似文献   

柳家坡滑坡群调研及其成因分析     

缪祥生 《地球科学与环境学报》1989,(3)

本文在对岚皋县柳家坡滑坡群进行野外调研的基础上,论述和分析了该滑坡群的自然地质环境、工程地质特征及形成滑坡的主要因素。文章认为,因有构成河流阶地基座的软弱的千枚糜棱岩充当滑床和在滑床与滑体间有充分起润滑作用的水的供给,是柳家坡滑坡产生的根本原因。本章最后还对滑坡群的防护和治理措施提出了看法和意见。  相似文献   

TESTING FOR REDUNDANCY IN PRODUCT QUALITY CONTROL TEST CRITERIA:AN APPLICATION TO AVIATION TURBINE FUEL     

JOHNM.DEANE  HALLIDAYJ.H.MACFIE 《地理学报(英文版)》1989,(2)

Given a set of test criteria that determine a quality specification,the question often arises whether anyof the tests are redundant because of intercorrelations.Simple selection of tests on the basis of partialcorrelations with the other tests is rejected on the basis that the random error in the data may be causingspurious correlations.One method is to use cross-validation to define the systematic principal components and examine thecorrelation structure in this reduced space.It is shown that the presence of principal componentsdominated by individual tests(‘variable specific’PCs),which are indicated by cross-validation as beingnon-systematic,must be taken into account.Having defined the dimensionality,a variable reductionmethod based on Procrustes rotation selects subsets of tests that preserve the structure of the samples inmultivariate space.This is an attractive proposition in the context of maintaining a quality controlspecification.It is also shown that the variable reduction technique can be used to aid the identificationof the true dimensionality of the data space.This approach is applied to a number of routine tests carriedout on aviation turbine fuel.  相似文献   

Consolidation and Break-up of the South American Platform in Southeastern Brazil: Tectonothermal and Denudation Histories   总被引：1，自引：0，他引：1  

P.C. Hackspacher  L.F.B. Ribeiro  M.C.S. Ribeiro  A.H. Fetter  J.C. Hadler Neto  C.E.S. Tello  E.L. Dantas 《Gondwana Research》2004,7(1):91-101

The different tectonic stages that occurred at the end of the Proterozoic and during the Phanerozoic have an important bearing on the tectonothermal history of the South American Platform and its consolidation. Geochronological data (U/Pb monazite, ⁴⁰Ar/³⁹Ar whole rock) and apatite fission-track analysis, from Precambrian rocks of the southeastern Brazilian coastline, permit the modeling of a long-term thermal history of the crust and constrain variable denudation rates.Using these data, a temperature-time diagram reflects a period of accelerated exhumation during the end of the Brasiliano Orogeny, followed by long stability and reactivation of the platform during the Rifting Phase of the South Atlantic Ocean.U/Pb zircon and monazite (blocking temperature of ca. 650° C) data from a series of igneous bodies suggest that a tangential and transpressional tectonic regime occurred between 625 and 610 Ma. During the following escape tectonics, between 610 and 590 Ma the exhumation process indicates cooling rates of ca. 12°C/Ma. ⁴⁰Ar/³⁹Ar biotite ages between 540 and 510 Ma (ca. 300°C) and a corrected fission-track age on apatites (100°C) of 480 Ma indicate an exhumation event related to block tectonics with huge vertical displacement along shear zones.A long stabilization phase, with low exhumation, and cooling rate around 0.25°C/Ma was recorded from the Cambro/Ordovician to the Mesozoic. At 65 Ma an acceleration of the exhumation through denudation and reworking of the South American surface with cooling rate of 1.5°C/Ma is observed.The uplift of the Mantiqueira and Serra do Mar mountain ranges along the southeast Brazilian coastline works as a climatic barrier provoking lateral erosional processes causing long-term scarp retreat, combined with intense, but progressive denudation towards the continent. A denudation of 2.5 to 4 km was calculated for such processes. This lateral retreat of escarpments and flexural response can provide important insights regarding marginal isostatic uplift and the evolution of offshore sedimentary basins of southeast Brazil.  相似文献   

江门"12.19"强对流天气分析     

郑芙蓉 《广东气象》2003,(3):24-25

2002年12月份江门地区出现大范围的冰雹，这在历史资料中是绝无仅有的，本文对这次强对流天气成因进行了分析，分析表明，此次强对流天气是在低层暖湿气流短时加强进退，江南锋生的有利环境背景下发生的。  相似文献   

青海瓦里关大气气溶胶元素富集特征及其来源   总被引：15，自引：3，他引：15       下载免费PDF全文

温玉璞  徐晓斌等 《应用气象学报》2001,12(4):400-408

利用中子活化及PIXE和可见光灰度仪, 对青海瓦里关大气本底基准监测站的大气气溶胶样品进行了测量。通过元素相对浓度、富集因子和主因子分析等数据统计分析, 并结合同期的气团后退轨迹分布资料, 讨论了瓦里关大气气溶胶元素的组成及来源。结果表明, 位于青藏高原偏远地区的瓦里关大气气溶胶以土壤及地壳等自然来源为主, 因子分析的方差百分数给出瓦里关气溶胶中自然源的贡献率平均在70%以上。燃煤、交通及冶炼等人为源也占有一定比例。大气黑碳气溶胶的观测也表明人类活动影响的存在。人为源的影响多与来自东部及河西走廊等经济发达地区的气流有关。  相似文献