Spatial Variability of Soil Water Controlled by the Topographical Factors
Shuitu baochi yanjiu, 2008 The Loess Plateau,in western China,is a water limited agricultural region,and water is the most important factor lim- iting agricultural production as well as re-vegetation in this region.Therefore,understanding the spatial distribution of soil water is ...
HE Xiao-hui~
doaj
An asymptotic and empirical smoothing parameters selection method for smoothing spline ANOVA models in large samples. [PDF]
Biometrika, 2021 Sun X, Zhong W, Ma P.
europepmc +1 more source
Spline Smoothing: A Special Case of Diffusion Smoothing [PDF]
Procedings of the Alvey Vision Conference 1989, 1989 Diffusion Smoothing (DS) implements the smoothing by directly solving a boundary value problem of the diffusion equation — = b V2u with explicit or implicit numerical schemes, it provides a uniform theoretical base for some other smoothing methods. It has shown that the elegant Gaussian smoothing (GS) is equivalent to the initial value problem of DS ...
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Life Cycle Pricing and the Measurement of Inflation [PDF]
This paper explores the extent to which goods follow systematic pricing patterns over their life cycle. The theoretical literature, and anecdotal evidence, often suggests that new products are often introduced at high prices which decline as the good ...
Syed, Iqbal, Melser, Daniel
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Vector-valued Lg-splines II. Smoothing splines
Journal of Mathematical Analysis and Applications, 1984 In the first part of this series of papers [ibid. 70, 505-529 (1979; Zbl 0435.65007)] the authors have been concerned with the interpolation problem for vector-valued Lg-splines. In the present part, they continue their studies by considering the smoothing problem in the same vein.
Sidhu, Gursharan S., Weinert, Howard L.
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An Improved CH4 Profile Retrieving Method for Ground-Based Differential Absorption Lidar
AtmosphereRange-resolved CH4 concentration measurement is important prior data for atmospheric physical and chemical models. Ground-based differential absorption lidar (DIAL) can measure the vertical distribution of CH4 concentration in the atmosphere.
Lu Fan, Yong Wan, Yongshou Dai
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Spline methods for extracting interest rate curves from coupon bond prices [PDF]
Cubic splines have long been used to extract the discount, yield, and forward rate curves from coupon bond data. McCulloch used regression splines to estimate the discount function, and, more recently, Fisher, Nychka, and Zervos used smoothed splines ...
Daniel F. Waggoner
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Unemployment Duration in Germany – A comprehensive study with dynamic hazard models and P-Splines [PDF]
This paper makes use of data from the German socio-economic panel to gain new insights into the determinants of unemployment duration in Germany. Due to substantial differences with respect to labour market outcomes we follow a stratified approach with ...
Torben Kuhlenkasper +1 more
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Oracally Efficient Two-Step Estimation of Generalized Additive Model [PDF]
Generalized additive models (GAM) are multivariate nonparametric regressions for non-Gaussian responses including binary and count data. We propose a spline-backfitted kernel (SBK) estimator for the component functions.
Wolfgang Karl Härdle +2 more
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Cubic spline population density functions and subcentre delimitation. The case of Barcelona [PDF]
The presence of subcentres cannot be captured by an exponential function. Cubic spline functions seem more appropriate to depict the polycentricity pattern of modern urban systems.
Anna Galindo +2 more
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