THE GEOMETRY OF MULTIVARIATE OBJECT PREPROCESSING     

STANLEY N.DEMING  JOHN A.PALASOTA Department of Chemistry  University of Houston  Houston  TX -  U.S.A.AND JOHN M.NOCERINO United States Environmental Protection Agency  Environmental Monitoring Systems Laboratory  Las Vegas  NV -  U.S.A. Author to whom correspondence should be addressed. 《地理学报(英文版)》1993,(5)

The geometric properties of three common object-preprocessing transformations(constant sum,orclosure;constant length,or normalization;and maximum value,or ratioing)are investigated.Anargument is made for using absolute values in the constant sum and maximum value transformations.In general,each transformation distorts the shape and dimensionality of patterns in the data:transformed data lie on(C-l)-dimensional surfaces in the original C-dimensional space.A data set thathas been closed by one of these transformations can be reopened if a vector containing the constant sums,constant lengths or maximum values of the original objects was retained.Transformed data sets may befreely interconverted among these three transformations without the loss of information.  相似文献   

The　optimum　source－time　function　for　generating　finite－difference　synthetic　seismograms     

Abdolrahim JAVAHERIAN 《地震学报(英文版)》1994,7(1):23-31

Ｔｈｅｏｐｔｉｍｕｍｓｏｕｒｃｅ－ｔｉｍｅｆｕｎｃｔｉｏｎｆｏｒｇｅｎｅｒａｔｉｎｇｆｉｎｉｔｅ－ｄｉｆｆｅｒｅｎｃｅｓｙｎｔｈｅｔｉｃｓｅｉｓｍｏｇｒａｍｓＡｂｄｏｌｒａｈｉｍＪＡＶＡＨＥＲＩＡＮ（ＩｎｓｔｉｔｕｔｅｏｆＧｅｏｐｈｙｓｉｃｓ，ｔｈｅ...  相似文献   

Characteristics of the mantle source region of sodium lamprophyres and petrogenetic tectonic setting in northeastern Hunan,China   总被引：2，自引：0，他引：2  

JIA Dacheng    HU Ruizhong  LU Yan  XIE Guiqing & QIU Xuelin .Key Laboratory of Ore Deposit Geochemistry  Institute of Geochemistry  Chinese Academy of Sciences  Guiyang 《中国科学D辑(英文版)》2004,47(6):559-569

~~Characteristics of the mantle source region of sodium lamprophyres and petrogenetic tectonic setting in northeastern Hunan,China~~  相似文献   

杨村煤矿2702工作面水害分析及防治措施     

陈玉玲  冯超  路志堂 《煤田地质与勘探》2004,32(Z1):114-117

杨村煤矿2702工作面受底板奥灰、十四灰水威胁,采用音频透视技术对底板的富水性进行了探测,并施工了井下钻孔.本文从水质分析、安全水压、相对隔水层厚度和突水系数等方面论证了2702工作面存在的水害威胁,对工作面开采可行性进行了论证,并制订了防治水措施,保证了工作面的安全回采.  相似文献   

COARSE-PARTICLE TRANSPORT IN A GRAVEL-BED RIVER     

William W.EMMETT  Robert L.BURROWS  and Edward F.CHACHO  Jr. 《国际泥沙研究》1996,(2)

ＣＯＡＲＳＥ－ＰＡＲＴＩＣＬＥＴＲＡＮＳＰＯＲＴＩＮＡＧＲＡＶＥＬ－ＢＥＤＲＩＶＥＲＷｉｌｌｉａｍＷ．ＥＭＭＥＴＴ１，ＲｏｂｅｒｔＬ．ＢＵＲＲＯＷＳ２，ａｎｄＥｄｗａｒｄＦ．ＣＨＡＣＨＯ，Ｊｒ３．（１Ｕ．Ｓ．ＧｅｏｌｏｇｉｃａｌＳｕｒｖｅｙ，Ｗａｔｅ...  相似文献   

Seasonal　Transition　of　Summer　Rainy　Season　over　Indochina　and　Adjacent　Monsoon　Region   总被引：10，自引：0，他引：10  

Jun MatsumotoDepartment of Geography  University of Tokyo --  Hongo  Bunkyo-ku  Tokyo  Japan 《大气科学进展》1997,(2)

ＳｅａｓｏｎａｌＴｒａｎｓｉｔｉｏｎｏｆＳｕｍｍｅｒＲａｉｎｙＳｅａｓｏｎｏｖｅｒＩｎｄｏｃｈｉｎａａｎｄＡｄｊａｃｅｎｔＭｏｎｓｏｏｎＲｅｇｉｏｎＪｕｎＭａｔｓｕｍｏｔｏＤｅｐａｒｔｍｅｎｔｏｆＧｅｏｇｒａｐｈｙ，ＵｎｉｖｅｒｓｉｔｙｏｆＴｏｋｙｏ...  相似文献   

区域磁异常研究的系统性论述——评介《乌克兰地盾地壳磁模型及构造》     

郭武林  .A.Крутиховс-кая  И.К.Памкевич  И.М.Силина 《吉林大学学报(地球科学版)》1985,(1)

克鲁奇霍夫斯卡娅的《乌克兰地盾地壳磁模型及构造》一书,是迄今利用区域磁异常研究地壳深部构造及其所取得的成果较为系统、而又全面的一本论著。它对我国开展这方面工作无疑有较大参考价值,并对有关方面的研究具有指导意义。 书中,作者着重讨论了地磁场与地壳深部带构造的关系,以及按作者制定的区域磁异常解释方法(其中最重要的是全面分析地壳上部磁性体  相似文献   

非洲—阿拉伯克拉通的环形构造及其矿床成因的几点看法     

Е.Л.Сулиди-Кондратьев  Б.Е.Забродин  王仁章 《华北地质》1984,(3)

在非洲—阿拉伯克拉通的范围内,发育着(可以划分出)不同成因,不同延长和延深的各种各样的环形构造(见插图)。它们不同程度地影响到地壳各时代的堆积物以至整个地图。陆核是最大的环形构造,在形成时代上相当于古老的原始变质岩层形成的时间。对非洲—阿拉伯克拉通基底上的这些新构造,首次采用遥感探测方法进行了研究。它分为西非(1),阿拉伯—努比亚(2),中非(3),塔恩扎尼(4),索马里(5),南非(6)以及莫三鼻给(7)等七个陆核。  相似文献   

LOCAL SCOUR ESTIMATION AT BRIDGE SITE: MODIFICATION AND APPLICATION OF LACEY FORMULA   总被引：1，自引：0，他引：1  

Md. Munsur RAHMAN  iwfm.buet.ac.bd  at present: Post Doctoral Research fellow  Ujigawa Open Laboratory  Disaster Prevention Research Institute  Kyoto University  Shimomisu  Yoko-Oji  Fushimi-Ku  Kyoto -  Japan  M. Anisul HAQUE 《国际泥沙研究》2003,18(4)

In the recent years, it has been established that b/h or h/b (b = length of the structure in the lateral direction and h = approach flow depth) is the dominant factor for the estimation of local scour depth around abutments and piers. One of the major limitations of the Lacey formula is that it predicts only one value of the scour depth for a specific river because of the absence of important parameters b and h. Therefore, its application is quite uncertain for variable b and h. Considering its limitations and experimental facts of flow concentration and shear stress amplification close to above structures, the original Lacey formula is modified introducing the parameters b and h. The applicability of the original as well as modified Lacey formula is tested to the data collected from major rivers in Bangladesh.  相似文献   

Conodonts from the Upper Cambrian Sesong and Hwajeol Formations in the Sabuk Area, South Korea     

LEE Byung-SuDepartment of Earth Science Education  Chonbuk National University  Jeonju  -  Korea Zhu Xiling 《《地质学报》英文版》2002,76(2):155-165

This paper presents a conodont biostratigraphic study on the Upper Cambrian Sesong and Hwajeol Formations in the Sabuk area, Korea. Two samples near the base of the Sesong Slate at the Pukil section contain lower Upper Cambrian conodonts, comprising Furnishina furnishi, F. kranzae, F. pernical, F. triangulate, Hertzina elongata, Laiwugnathus doidyxus?, Phakelodus elongatus, Muellerodus? obliquus, Westergaardodina matsushitai and W. moessebergensis. This is the first conodont record of the Upper Cambrian formations recovered yet in the northern limb of the Paekunsan syncline. The faunal assemblage is correctable with the lower Upper Cambrian W. matsushitai Zone of North China. Four local biozones are recognized in the Hwajeol Formation, i.e. the Proconodontus, Eoconodontus notchpeakensis, Cambrooistodus minutus and Cordylodus proavus Zones in ascending order. This zonal scheme is essentially equivalent to that of the southern limb of the Paekunsan syncline and they are correlatable with zones in other pa  相似文献