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Feature Selection Based on Term Frequency and T-Test for Text Categorization
feature selection term frequency t-test text classification
2013/6/14
Much work has been done on feature selection. Existing methods are based on document frequency, such as Chi-Square Statistic, Information Gain etc. However, these methods have two shortcomings: one is...
The student's dilemma: ranking and improving prediction at test time without access to training data
The student's dilemma ranking improving prediction test time without access training data
2013/4/27
The standard approach to rank the performance of several classifiers for a given classification problem is via an independent labeled validation dataset. However, in various applications only unlabele...
Anti-retroviral therapy for HIV: who should we test and who should we treat?
Anti-retroviral therapy for HIV who should we test who should we treat?
2012/9/18
In most countries CD4+ cell counts are still used for deciding when to start HIV-positive people on anti-retroviral therapy. However, various CD4+ thresholds, 200, 350 or 500/ μL, are chosen arbitrar...
Test MaxEnt in Social Strategy Transitions with Experimental Two-Person Constant Sum 2$\times$2 Games
maximum entropy principle social strategy transitions constant sum game experimental eco-nomics
2012/9/18
Using laboratory experimental data, we test the uncertainty of social state transitions in various competing environments of fixed paired two-person constantsum 2×2 games. It firstly shows that,the di...
Test for bandedness of high-dimensional covariance matrices and bandwidth estimation
Banded covariance matrix bandwidth estimation high data dimension largep, small n nonparametric.
2012/9/17
Motivated by the latest effort to employ banded matrices to esti-mate a high-dimensional covariance Σ, we propose a test for Σbeing banded with possible diverging bandwidth. The test is adaptive to th...
Modification of Tukey's Additivity Test
two-way ANOVA additivity tests Tukey additivity test
2012/9/19
In this paper we discuss testing for an interaction in the two–way ANOVA with just one observation per cell. The known results are reviewed anda simulation study is performed to evaluate type I and ty...
Change point analysis of an exponential model based on Phi-divergence test-statistics: simulated critical points case
Change poin Exponential model Likelihood ratio test
2011/7/19
Recently Batsidis \textit{et al.} (2011) have presented a new procedure based on divergence measures for testing the hypothesis of the existence of a change point in exponential populations.
The V/S test of long-range dependence in random fields
Long memory V/S statistic random fields
2009/9/16
Recently, Giraitis et al. (2003, [10]) proposed the $V/S$ statistic for testing long memory in random sequences. We generalize this statistic to the setting of random fields. The null hypothesis is co...
A powerful test based on tapering for use in functional data analysis
functional data analysis quadratic forms high-dimensional testing rates of testing Fourier decomposition
2009/9/16
A test based on tapering is proposed for use in testing a global linear hypothesis under a functional linear model. The test statistic is constructed as a weighted sum of squared linear combinations o...