I. C. Demetriou

发表

Separation theorems for the extrema of best piecewise monotonic approximations to successive data

I. C. Demetriou, 2020, Optim. Methods Softw..

DATA ANALYSIS BY DIMINISHING RATES OF CHANGE AND ℓ1 APPROXIMATION

S. S. Papakonstantinou, I. C. Demetriou, 2015, IMECS 2015.

An Algorithm for Distributed Lag Estimation Subject to Piecewise Monotonic Coe-cients

I. C. Demetriou, E. E. Vassiliou, 2009 .

Discrete piecewise monotonic approximation by a strictly convex distance function

I. C. Demetriou, 1995 .

Least Squares Smoothing of Univariate Data to achieve Piecewise Monotonicity

M. J. D. Powell, I. C. Demetriou, M. Powell, 1991 .

The Minimum Sum of Squares Change to Univariate Data that gives Convexity

M. J. D. Powell, I. C. Demetriou, M. Powell, 1991 .

On the Sensitivity of Least Squares Data Fitting by Nonnegative Second Divided Differences

I. C. Demetriou, 2015 .

Sigmoid Data Fitting by Least Squares Adjustment of Second and Third Divided Differences

I. C. Demetriou, 2014 .

On Distributed-Lag Modeling Algorithms by r-Convexity and Piecewise Monotonicity

I. C. Demetriou, E. E. Vassiliou, 2014 .

Data Engineering by the Best ` 1 Convex Data Fitting Method

I. C. Demetriou, S. Papakonstantinou, 2014 .

Applications of the Discrete Least Squares 3-Convex Fit To Sigmoid Data

I. C. Demetriou, 2012 .

Optimality Conditions for Best L1 Data Fitting subject to Nonnegative Second Difierences

I. C. Demetriou, S. Papakonstantinou, 2008 .

Signs of divided differences yield least squares data fitting with constrained monotonicity or convexity

Ioannis C. Demetriou, I. C. Demetriou, 2002 .

CXFTV2: A Fortran subroutine for the discrete least squares convex approximation

I. C. Demetriou, 1997 .

A O(n) algorithm for the discrete best L4 monotonic approximation problem

I. C. Demetriou, 2020 .

Peak Estimation of Univariate Spectraby the Best L1 Piecewise Monotonic Approximation Method

I. C. Demetriou, Ioannis N. Perdikas, 2020, WSEAS TRANSACTIONS ON SYSTEMS AND CONTROL.

The Effectiveness of the Piecewise Monotonic Approximation Method for the Peak Estimation of Noisy Univariate Spectra

I. C. Demetriou, Ioannis N. Perdikas, 2019, 2019 International Conference on Control, Artificial Intelligence, Robotics & Optimization (ICCAIRO).

A Decomposition Theorem for the Least Squares Piecewise Monotonic Data Approximation Problem

I. C. Demetriou, 2019, Approximation and Optimization.

Peak Estimation of a Spectrum from Noisy Measurements by Least Squares Piecewise Monotonic Data Approximation

I. C. Demetriou, 2018 .

An Example of Peak Finding in Univariate Data by Least Squares Approximation and Restrictions on the Signs of the First Differences

I. C. Demetriou, 2015 .

On Signal Restoration by Piecewise Monotonic Data Approximation

I. C. Demetriou, V. Koutoulidis, 2013 .

An Application of Best L1 Piecewise Monotonic Data Approximation to Signal Restoration

I. C. Demetriou, 2013 .

A Distributed Lag Estimator with Piecewise Monotonic Coe-cients

I. C. Demetriou, E. E. Vassiliou, 2008 .

A theorem for piecewise convex-concave data approximation

I. C. Demetriou, 2004 .

A characterization theorem for the discrete best monotonic approximation problem

Ioannis C. Demetriou, I. C. Demetriou, 1990 .

Convex-Concave fitting to successively updated data and its application to covid-19 analysis

I. C. Demetriou, Demetrius E. Davos, 2022, Journal of Combinatorial Optimization.

A binary search algorithm for univariate data approximation and estimation of extrema by piecewise monotonic constraints

Ioannis C. Demetriou, I. C. Demetriou, 2021, Journal of Global Optimization.

Computational Statistics and Data Analysis a Linearly Distributed Lag Estimator with R-convex Coefficients

Ioannis C. Demetriou, I. C. Demetriou, E. E. Vassiliou, 2022 .

L2CXCV: A Fortran 77 package for least squares convex/concave data smoothing

Ioannis C. Demetriou, I. C. Demetriou, 2006, Comput. Phys. Commun..

L1PMA: A Fortran 77 package for best L1 piecewise monotonic data smoothing

I. C. Demetriou, 2003 .

Certain positive definite submatrices that arise from binomial coefficient matrices

I. C. Demetriou, E. A. Lipitakis, 2001 .

ALGORITHM XXX : L 2 WPMA , A FORTRAN 77 PACKAGE FOR WEIGHTED LEAST SQUARES PIECEWISE MONOTONIC DATA APPROXIMATION

Ioannis C. Demetriou, I. C. Demetriou, 2006 .

An adaptive algorithm for least squares piecewise monotonic data fitting

Ioannis C. Demetriou, I. C. Demetriou, E. E. Vassiliou, 2005, Comput. Stat. Data Anal..

A Characterization Theorem for the Best L 1 Piecewise Monotonic Data Approximation Problem

I. C. Demetriou, 2016 .

Infant Mortality and Income per Capita of World Countries for 1998–2016: Analysis of Data and Modeling by Increasing Returns

I. C. Demetriou, P. Tzitziris, 2017, Transactions on Engineering Technologies.

Smoothing Yield Curve Data by Least Squares and Concavity or Convexity

I. P. Kandylas, I. C. Demetriou, 2018 .

Infant Mortality and Economic Growth: Modeling by Increasing Returns and Least Squares

I. C. Demetriou, P. Tzitziris, 2017 .

Least Squares Data Fitting Subject to Decreasing Marginal Returns

I. C. Demetriou, 2013 .

The Karush-Kuhn-Tucker Test of Convexity of Univariate Observations and Certain Economic Applications

Ioannis C. Demetriou, I. C. Demetriou, Sofia A. Georgiadou, 2007, World Congress on Engineering.

EFFICIENT USE OF TOEPLITZ MATRICES FOR LEAST SQUARES DATA FITTING BY NONNEGATIVE DIFFERENCES

I. C. Demetriou, E. A. Lipitakis, E. E. Vassiliou, 2006 .

EXAMPLES ON AN ALGORITHM FOR LEAST SQUARES DATA FITTING BY NONNEGATIVE DIFFERENCES

I. C. Demetriou, E. A. Lipitakis, E. E. Vassiliou, 2005 .

Algorithm 742: L2CXFT: a Fortran subroutine for least-squares data fitting with nonnegative second divided differences

Ioannis C. Demetriou, I. C. Demetriou, 1995, TOMS.

An Example of Nondecomposition in Data Fitting by Piecewise Monotonic Divided Differences of Order Higher Than Two

I. C. Demetriou, 2018 .

Best L1 piecewise monotonic data modelling

I. C. Demetriou, 1994 .