Statistics

1811 Submissions

[4] viXra:1811.0505 [pdf] submitted on 2018-11-29 14:45:29

Compressed Monte Carlo for Distributed Bayesian Inference

Authors: L. Martino, V. Elvira
Comments: 16 Pages.

Bayesian models have become very popular over the last years in several fields such as statistics, signal processing, and machine learning. Bayesian inference needs the approximation of complicated integrals involving the posterior distribution. For this purpose, Monte Carlo (MC) methods such as Markov Chain Monte Carlo (MCMC) and Importance Sampling (IS) algorithms, are often employed. In this work, we introduce a compressed MC (C-MC) scheme in order to compress the information obtained previously by MC sampling. The basic C-MC version is based on the stratification technique, well-known for variance reduction purposes. Deterministic C-MC schemes are also presented, which provide very good performance. The compression problem is strictly related to moment matching approach applied in different filtering methods, often known as Gaussian quadrature rules or sigma-point methods. The connections to herding algorithms and quasi-Monte Carlo perspective are also discussed. C-MC is particularly useful in a distributed Bayesian inference framework, when cheap and fast communications with a central processor are required. Numerical results confirm the benefit of the introduced schemes, outperforming the corresponding benchmark methods.
Category: Statistics

[3] viXra:1811.0412 [pdf] submitted on 2018-11-27 01:41:50

On the Distributional Expansions of Powered Extremes from Maxwell Distribution

Authors: Jianwen Huang, Jianjun Wang, Zhongquan Tan, Jingyao Hou, Hao Pu
Comments: 13 Pages.

In this paper, asymptotic expansions of the distributions and densities of powered extremes for Maxwell samples are considered. The results show that the convergence speeds of normalized partial maxima relies on the powered index. Additionally, compared with previous result, the convergence rate of the distribution of powered extreme from Maxwell samples is faster than that of its extreme.
Category: Statistics

[2] viXra:1811.0392 [pdf] submitted on 2018-11-24 12:05:42

Human Papillomavirus is the Cause of Human Prostate Cancer

Authors: Ilija Barukčić
Comments: 31 pages. Copyright © 2018 by Ilija Barukčić, Jever, Germany. All rights reserved. Published by

Background: Human papillomavirus (HPV) has an important role in the oncogenesis of several malignant diseases. Some observational studies demonstrated the presence of HPV even in human prostate cancer (PC) while other studies failed on this point. The relationship between HPV infection and PC remains unclear. The aim of the present meta-analysis study is to investigate whether HPV serves as a cause or as the cause of PC. Methods: The PubMed database was searched for suitable articles. Previously published expert reviews and systematic meta-analysis were used as an additional source to identify appropriate articles. Articles selected for this meta-analysis should fulfill the following inclusion criteria: (a) no data access barrier, (b) polymerase chain reaction (PCR) DNA based identification of HPV. The method of the conditio sine qua non relationship was used to prove the hypotheses whether being married is a necessary condition (a conditio sine qua non) of PC. In other words, without being married no PC. The method of the conditio per quam relationship (sufficient condition) was used to prove the hypotheses if HPV is present in human prostate tissues then PC is present too. The mathematical formula of the causal relationship k was used to prove the hypothesis, whether there is a cause effect relationship between HPV and PC. Significance was indicated by a p-value (two sided) of less than 0.05. Results: In toto more than 136 000 000 cases and controls were re-analysed while more than 33 studies were considered for a meta-analysis. Several studies support the hypotheses without being married no PC. All the studies considered for a re-analyses support the null-hypotheses if HPV then PC, while the cause effect relationship between HPV and PC was highly significant. Conclusions: Human papillomavirus is the cause of human prostate cancer.
Category: Statistics

[1] viXra:1811.0323 [pdf] submitted on 2018-11-20 06:40:32

Neutrosophic Decision Making & Neutrosophic Decision Tree (Arabic Version).

Authors: A. A. Salama, Rafif Alhabib
Comments: 26 Pages.

In this research, we present neutrosophic decision-making, which is an extension of the classical decision-making process by expanding the data to cover the non-specific cases ignored by the classical logic, which in fact support the decision-making problem. The lack of information besides its inaccuracy is an important constraint affecting The effectiveness of the decision-making process, and we will rely on the decision tree model, which is one of the most powerful mathematical methods used to analyze many decisionmaking problems, where we extend it according to the neutrosophic logic by adding some indeterminate data (in the absence of probability) or by substituting the classical probabilities with the neutrosophic probabilities (in case of probability). We call this extended model the neutrosophic decision tree, which results in its use to reach the best decision among the available alternatives because it is based on data that is more general and accurate than the classical model.
Category: Statistics