Ghaemi, M.S., Agard, B., Trepanier, M. and Partovi Nia, V. (2017) A Visual Segmentation Method for Temporal Smart Card Data,
Transportmetrica A: Transport Science, Vol 13, Issue 5, 381-404.
This work is an intuitive visual map from a binary vector into a three-dimensional clock-like three-dimensional space to reveal the underlying temporal pattern of public transit users.
Mirshahi, M., Partovi Nia, V., and Adjengue, L. (2017) An Online Data Validation Algorithm for Electronic Nose,
Lecture Notes in Computer Science 10163, 104-120.
This is the extended version of the ICPRAM paper with some discussions about the computational complexity of our online outlier detection algorithm.
Mirshahi, M., Partovi Nia, V., and Adjengue, L. (2016) Statistical Measurement Validation with Application to Electronic Nose Technology,
Proceedings of the International Conference on Pattern Recognition Applications and Methods (ICPRAM), 407-414.
How do we predict odors? It seems easy at the first sight, since odor and chemicals are closely related, but
a mixture of several chemicals changes the odor perception. Sensors data are often unreliable. Here we describe and automatic method to validate the sensors data.
Partovi Nia, V. and Ghannad-Rezaie, M. (2016) Agglomerative Joint Clustering of
Metabolic Data with Spike at Zero: A Bayesian
Perspective, Biometrical Journal, Vol 58, Issue 2, 387-396.
Dendrogram is a visualization tool to demonstrate evolution of data groupings. We generalized dendrogram to forestogram.
Homaie, A. H., Partovi Nia, V., Gamache, M. and Agard, B. (2016) Flight deck crew reserve: from data to forecasting,
Engineering Applications of Artificial Intelligence, Vol 50, 106-114.
We develop a new version of a the random forest to predict the flight crew absence of airlines.
Davtalab-Olyaie, M., Roshdi, I., and Partovi Nia, V., and Asgharian, M. (2015)
On Characterizing Full Dimensional Weak Facets in DEA with
Variable Returns to Scale Technology, Optimization, Vol 64, Issue 11, 2455-2476.
Data envelopment analysis is a widely used technique for computing the relative efficiency over decision making units.
It turns out that the frontier of the envelop
is composed of two sort of facets, strong facts and weak facets. We developed a theory for characterizing the weak facets of the envelop and provided
a mixed-integer programming that computes all of them.
Kijko, G., Jolliet, O., Partovi Nia, V., Doudrich G., and Margni M. (2015) Impact of occupational exposure to chemicals in life
cycle assessment: A novel characterization model based on measured concentrations and labour hours, Environmental Science and Technology, Vol 49, Issue 14, 8741-8750.
We show how uncertainty can be quantified using Monte Carlo method in life cycle data analysis.
Partovi Nia, V. and Davison, A. C. (2015) A Simple Model-Based Approach to
Variable Selection in Classification and Clustering, Canadian Journal of Statistics, Vol 43, Issue 2, 157-175.
We show that a simple Bayesian variable selection adapted for classification and clustering
is comparable with many sophisticated exisiting variable selection methods.
Ghaemi, M. S., Agard, B., Partovi Nia, V., and Trepanier, M. (2015) Challenges in Spatial-Temporal Data
Analysis Targeting Public Transport, 15th IFAC Symposium on Information Control Problems in Manufacturing (INCOM), Vol 48, Issue 3, 442-447.
We discuss complex challenges in public transport data mining and resolve some of the issues with simple tricks.
Ghaemi, M. S., Agard, B., Partovi Nia, V., and Trepanier, M. (2015) Identifying Temporal User Behavior through Smart Card
Data, Conference on Advanced Systems in Public Transport (CASPT), to appear.
We discuss different methods for analyzing temporal data in public transport.
Tilouche, S., Bassetto, S., and Partovi Nia, V. (2014)
Classification Algorithms for Virtual Metrology,
Proceedings of IEEE International Conference on Management of Innovation and Technology (ICMIT),
We reviewed algorithms that could be applied as a tool in virtual metrology.
Our simulation shows the neural networks regression is a strong candidate.
Mouret, G., Brault, J.-J., and Partovi Nia, V. (2013) Generalized Elastic Net Regression,
JSM Proceedings, Section on Statistical Learning and Data Mining, Montreal, American Statistical Association, 3457-3464.
Elastic Net penalty is an effective tool for variable selection
in linear regression. This work generalizes the elastic net regularization penalty. We suggest a Bayesian perspective for estimation of the
Partovi Nia, V., Asgharian, M., and Bassetto, S. (2013) A Formal Test for Binary R&R Measurement Systems,
JSM Proceedings, SSC Section, Montreal, American Statistical Association, 2865-2872
Repeatability and Reproducability, called R&R, are minimum requirments of a measurement system.
A test of R&R is often required as an improtant part of statistical process control. Here we show that Pearson statistic can be used in order to build a
formal statistical test of repeatability and reproducability for a pass-fail inspection measurement.
Trepanier, M., Partovi Nia, V. and Agard, B. (2013) Assessing Public Transport Travel Behaviour from Smart Card Data with Advanced Data Mining Techniques,
13th World Conference on Transport Research (WCTR)
We discuss various challenges in public transport data analysis. We show various handy tricks to analyze complex public transport data.
Drikvandi, R., Verbeke, G., Khodadadi, A, and Partovi Nia, V. (2013) Testing Multiple Variance Components in Linear Mixed Effects Models,
Biostatistics, Vol 14, Issue 1, 144-159.
Testing multiple variance components is a non-standard, important, and a difficult problem with a lot of applications in biology, medicine, ecology and many others.
Here we propose a permutation test based on a simple test statistic. This work introduces a methodology for testing even a subset of variance components with zero.
Partovi Nia, V. and Davison A. (2012) High-Dimensional Bayesian Clustering with Variable Selection: The R Package bclust,
Jounral of Statistical Software, Vol 47, Issue 5, 1-22.
We show how Bayesian clustering with variable selection can be done using our package bclust.
The bclust package implements a new Bayesian framework for variable selection in high-dimensional clustering.
Partovi Nia, V. and Stephens D. A. (2011) Dendrogram Representation of Stochastic Clustering,
Probability: Interpretation, Theory and Applications, Nova Publishers, Chapter 6, 203-217.
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We show how a hierarchical tree can be extracted from random samples of groupings. We also explain the ideas using one of our R packages published on CRAN.
Partovi Nia, V. (2009) Fast High-Dimensional Bayesian Classification and Clustering,
Ecole Polytechnique Federale de Lausanne, Ph.D. Thesis.
Parchami, A., Mashinchi, M., and Partovi Nia, V. (2008) A Consistent Confidence Interval for Fuzzy Capability Index, Applied and Computational Mathematics, Vol. 7, no. 1, 119-125.
Messerli, G., Partovi Nia, V., Trevisan, M.,
Kolbe, A., Schauer, N., Geigenberger, P., Chen, J.,
Davison, A. C., Fernie, A. R. and Zeeman, S. C. (2007) Rapid Classification of Phenotypic Mutants of Arabidopsis Via Metabolite Fingerprinting, Plant Physiology,
Vol. 143, 1484-1492.
We show metabolite fingerprinting
is an effective method of classification forward genetic mutants of Arbidopsis Thaliana.
Partovi Nia, V. (2006) Gauss-Hermite Quadratures: Numerical or Statistical Method? The 8th. Iranian Statistical Conference Proceedings (invited and refereed papers), 209-215