广义最小二乘模型与判别分类

一、引言经典最小二乘模型常用于一般的曲线拟合。设变量x,y有函数关系 y=f(x,β) ε (1)式中β是待定参数,ε为误差。x和β通常是向量,f是它们的线性或非线性函数。问题是给出n次观测数据(x_k,y_k),k=1,…,n,要求确定β使Q=sum from k=1 to n W_k〔y_k-f(x_k,β)〕~2→min     

关于生成L-Fuzzy子群

主要研究生成L—Fuzzy子群。首先引入生成L—Fuzzy子群的概念，给出了生成L—Fuzzy子群的代数刻画式：[A](x)=A(x)=∨{[A(%1)∨A(%1)^-1]…∧[A(xn)∨A(xn^-1)]，x=x1…xn}，任意x∈Co基于L-Fuzzy集上的Zadeh型映射和双诱导映射理论，深入地研究了生成L-Fuzzy子群的若干性质，得到L—Fuzzy正规子群A，B的并A∪B的生成子群仍是L—Fuzzy正规子群，L—Fuzzy子集A的同态映象的生成子群[(fφ)(A)]等于L—Fuzzy子集A的生成子群的同态映象（fφ)[A]等一系列颇有意义的结论。     

索引

英文中文Adelaide FaultA f riea,x℃eently diseovered depositsAgnieo Eagl。(Canada)A jo(A:1 2 0 n a U SA)A 1 asl:a,gold rus}lesAI!u、ial plaeersA n aeonda System人5 ia,reeently diseovered deposits气tox,lie nun:ber\to:n ie strtzeture、\to,11 iC认厂e 1 9 ht、:a rifcro一:5 depo:its diseordant in volea- n。一sedimentary Context:\:1 stralasia,reeently diseovered depositsAustraliagold rL:shes reeentl了diseovered depositsRagt:10(PhilipPines)Ballarat(人 ustralia)Barbertnn入lotlntain LandBeaeh …     

用趋势面分析方法研究区域水文地质规律

一、基本原理趋势面分析是用数学方法将地质现象的观测值z分为趋势(?)=f=(x,y) 和偏差ε两部份,前者反映了受大范围的系统性的因素控制的区域性变化,后者反映了受局部的随机的因素控制的局部性变化。水文地质现象是随空间和时间而变化的,即z=f(x,y,t)+ε。为了求得某个观测点(x_1,y_1)上的随时间而变化的规律,可以用曲线平滑方法除去随机干扰,得到(?)=f(t),使锯齿状的曲线变为波状起伏。同样,为了求得某一时刻t_1的平面上的变化规律,可以     

有界域上涉及临界增长含任意特征值的一类共振问题

给出了半线性椭圆方程-△u=λu|u|^2*-2u-f(x,u),λ∈[λ1,λk]；-△u=λu-γ（x,u) h(x),limu→∞γ（x，u）/|u|= ∞ λ∈[λ1,λk]的Dirichent问题的非平凡解的存在性定理等。     

起伏地形上规则二度体复重磁场正演和直接反演 连载3

上接 119页9　反演方法推导中的有关公式为了对复场展开式作简化表示 ,将会多次用到2个递推公式 ,这里预先导出。设 :x1=∑ni=1σi,　x2 =∑ni,j=1σiσj,(i 相似文献   

最基本的三种混合信号分离法的综述

一、信号(波形)的混合形式经常遇到的信号混合形式,最基本的有下列三种形式:(a)加性:如 x(t)=s(t)+n(t)(b)乘性:如 x(t)=a(t)×c(t)(c)褶积性:如 x(t)=b(t)*r(t)当然,更复杂的混合形式可以通过以上三种运算的复合得到。滤波含有把信号分离的意思,即在混合信号中分离出所需要的信号分量,而同时压制其它分量。当然,这里所说的需要的分量也是相对的,由实际问题而定。     

贵州1∶5万耕地质量地球化学调查评价方法技术

利用矩阵的分块及矩阵的奇异值分解,探讨了矩阵及其扰动后的矩阵阶数不同时特征值的扰动界,得到了Hermite矩阵特征值的Wielandt-Hoffman-残差型扰动界。进一步将所得结果推广到可对称化矩阵,给出了可对称化矩阵特征值新的Wielandt-Hoffman-残差型扰动界,且所得结论推广了原有结果。     

米列符号之几何意义

在几何上面之方程式,不外三种写法:(1)Ax+By+Cz+D=o,(2)x/a+y/b+z/c=1,(3)λx+μv+z~(1/2)=ρ或为A/(A~2+B~2+C~2)~(1/2)x+B/(A~2-B~2+C~2)~(1/2)y+C/(A~2+B~2+C~2)~(1/2)z=D/(A~2+B~2+C~2)~(1/2)。此三式之中,(2)式名为截轴式,(Intercept lotm of equation of aplane)式中abc之值,为此面在x,y,z三轴上,相截之长度。亦即结晶学上,Weiss符号之指数(Index),故以Weiss符号,表示此面,可以写成a;b;c。     

偶层场强分量表达式在求磁异常各阶导数上的应用

根据位场理论,将观测曲面上测得的△T(或Za)视为位函数,代入偶层位公式的极限形式,求解出对应于△T(或Za)的等效偶层的磁化强度J(α,β,γ)。将J(α,β,γ,)代入偶层场强分量表达式 (α)/(α)n(1/r)dS 只要给定了方向u,就可得到△T沿该方向的一阶导数。将J(α,β,γ)代入(α)T/(α)x,(α)T/(α)y,(α)T/(α)z的积分表达式就能得到△T的二阶导数。因为使用的是二重积分形式的导数的精确表达式,它克服了空间域差商求导的致命弱点。特别是该方法能将起伏地形曲面上的场值向上延拓(包括曲化平)和求一阶(或二阶)导数两个转换过程集中在一个积分表达式中,一次计算完毕。     

The terrestrial fauna of the Late Triassic Pant-y-ffynnon Quarry fissures,South Wales,UK and a new species of Clevosaurus (Lepidosauria: Rhynchocephalia)

Pant-y-ffynnon Quarry in South Wales yielded a rich cache of fossils in the early 1950s, including articulated specimens of new species (the small sauropodomorph dinosaur Pantydraco caducus and the crocodylomorph Terrestrisuchus gracilis), but no substantial study of the wider fauna of the Pant-y-ffynnon fissure systems has been published. Here, our overview of existing specimens, a few described but mostly undescribed, as well as freshly processed material, provides a comprehensive picture of the Pant-y-ffynnon palaeo-island of the Late Triassic. This was an island with a relatively impoverished fauna dominated by small clevosaurs (rhynchocephalians), including a new species, Clevosaurus cambrica, described here from a partially articulated specimen and isolated bones. The new species has a dental morphology that is intermediate between the Late Triassic Clevosaurus hudsoni, from Cromhall Quarry to the east, and the younger C. convallis from Pant Quarry to the west, suggesting adaptive radiation of clevosaurs in the palaeo-archipelago. The larger reptiles on the palaeo-island do not exceed 1.5?m in length, including a small carnivorous crocodylomorph, Terrestrisuchus, and a possible example of insular dwarfism in the basal dinosaur Pantydraco.     

The effect of water on accessory phase solubility in subaluminous and peralkaline granitic melts

The solubilities of columbite, tantalite, wolframite, rutile, zircon and hafnon were determined as a function of the water contents in peralkaline and subaluminous granite melts. All experiments were conducted at 1035 °C and 2 kbar and the water contents of the melts ranged from nominally dry to approximately 6 wt.% H₂O. Accessory phase solubilities are not affected by the water content of the peralkaline melt. By contrast, solubilities are affected by the water content of the subaluminous melt, where the solubilities of all the accessory phases examined increase with the water content of the melt, up to 2 wt.% H₂O. At higher water contents, solubilities are nearly constant. It can be concluded that water is not an important control of accessory phase solubility, although the water content will affect diffusivities of components in the melt, thus whether or not accessory phases will be present as restite material. The solubility behaviour in the subaluminous and peralkaline melts supports previous spectroscopic studies, which have observed differences in the coordination of high field strength elements in dry vs. wet subaluminous granitic glasses, but not for peralkaline granitic glasses. Lastly, the fact that wolframite solubility increases with increasing water content in the subaluminous melt suggests that tungsten dissolved as a hexavalent species.     

Quaternary stresses revealed by calcite twinning inversion: insights from observations in the Savonnières underground quarry (eastern France)

Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ₁ roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003).     

HYDROGEOLOGY

正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level     

METAMORPHIC PETROLOGY

正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7),     

SERIALS

正~~     

GEOPHYSICAL EXPLORATION

正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci-     

QUATERNARY GEOLOGY & GEOMORPHOLOGY

正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli-     

PETROLEUM GEOLOGY

正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.)     

GEOCHEMISTRY

正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861