نتایج جستجو برای: sample prediction

تعداد نتایج: 650561  

2013
Frank Dudbridge

Polygenic scores have recently been used to summarise genetic effects among an ensemble of markers that do not individually achieve significance in a large-scale association study. Markers are selected using an initial training sample and used to construct a score in an independent replication sample by forming the weighted sum of associated alleles within each subject. Association between a tr...

Journal: :Int. J. Computational Intelligence Systems 2010
Yuanquan Shi XiaoJie Liu Tao Li Xiaoning Peng Wen Chen Ruirui Zhang Yanming Fu

To solve chaotic time series prediction problem, a novel Prediction approach for chaotic time series based on Immune Optimization Theory (PIOT) is proposed. In PIOT, the concepts and formal definitions of antigen, antibody and affinity being used for time series prediction are given, and the mathematical models of immune optimization operators being used for establishing time series prediction ...

2001
Frank Van Overwalle Dirk Van Rooy

The statistical law of large numbers prescribes that estimates are more reliable and accurate when based on a larger sample of observations. This effect of sample size was investigated on causal attributions. Subjects received fixed levels of consensus and distinctiveness covariation, and attributions were measured after a varying number of trials. Whereas prominent statistical models of causal...

2016
B Van Calster EW Steyerberg T Bourne D Timmerman GS Collins

External validation studies of prediction models are of utmost importance in order to assess the performance of a predictionmodel in different locations (Altman et al., 2009).We therefore readwith interest the recent external validation study of the ADNEX model (Szubert et al., 2016). For patients with a persistent adnexal tumor who are scheduled for surgery, the ADNEXmodel predicts the risk of...

Journal: :Trans. GIS 2006
Edzer J. Pebesma

Although many geostatistical studies only study a measured attribute in relation to its spatial coordinates, this paper argues that other layers in the GIS database can be of additional use for spatial prediction purposes. They may enter the prediction equations as predictors in a regression model, or as correlated measurements. In an example we will show how this is done for predicting PCB138,...

Journal: :Bioinformatics 2007
Ignacio Medina David Montaner Joaquín Tárraga Joaquín Dopazo

UNLABELLED Sample classification and class prediction is the aim of many gene expression studies. We present a web-based application, Prophet, which builds prediction rules and allows using them for further sample classification. Prophet automatically chooses the best classifier, along with the optimal selection of genes, using a strategy that renders unbiased cross-validated errors. Prophet is...

Journal: :Genetic epidemiology 2015
Chia-Yen Chen Jiali Han David J Hunter Peter Kraft Alkes L Price

Polygenic prediction using genome-wide SNPs can provide high prediction accuracy for complex traits. Here, we investigate the question of how to account for genetic ancestry when conducting polygenic prediction. We show that the accuracy of polygenic prediction in structured populations may be partly due to genetic ancestry. However, we hypothesized that explicitly modeling ancestry could impro...

2013
Tao FENG Harry J.P. TIMMERMANS

This paper proposes a map matching algorithm using Bayesian belief network for GPS traces to generate the spatial-temporal information of individuals. The algorithm incorporates the road network topology, distance from trace nodes to road segments, the angle between two lines, direction difference, accuracy of measured GPS log point, and position of roads. The GPS data collected in the Eindhove...

2007
Takeyasu M. Ito

The previous two SAMPLE experiments yielded a measurement of the axial e-N form factor GA substantially different from the theoretical estimate. In order to confirm this observation, a third SAMPLE experiment was carried out at a lower beam energy of 125 MeV (Q = 0.038 (GeV/c)) on a deuterium target. The data analysis is now at the final stage and the results are consistent with the theoretical...

2004
Mordehai Milgrom Robert H. Sanders

We examine two corollaries of MOND pertaining to properties of the equivalent darkmatter halo. MOND predicts for pure exponential discs a tight relation involving the halo and disc scale lengths and the mean acceleration in the disc, which we find to test favorably against the Verheijen sample of Ursa Major galaxies. A correlation between halo and disc length scales is also apparent when the “m...

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