Search Results - subject:"plot"

Designed experiments to characterize PEMFC material properties and performance

Flick, Sarah; Schwager, Maximilian; McCarthy, Edward; … - In: Applied Energy 129 (2014) C, pp. 135-146

of a micro-porous layer (MPL) for the first time. Two full factorial split-plot designs were used based on six operating …

Persistent link: https://www.econbiz.de/10011041034

A coordinate-exchange two-phase local search algorithm for the D- and I-optimal designs of split-plot experiments

Sambo, Francesco; Borrotti, Matteo; Mylona, Kalliopi - In: Computational Statistics & Data Analysis 71 (2014) C, pp. 1193-1207

Many industrial experiments involve one or more restrictions on the randomization. In such cases, the split-plot design … number of independent settings of the hard-to-change factors. Several criteria can be adopted for optimizing split-plot … of split-plot experiments, the coordinate-exchange two-phase local search (CE-TPLS), is proposed. The CE-TPLS algorithm …

Persistent link: https://www.econbiz.de/10010871339

Optimizing backup power systems through Six Sigma : An Indian case study of diesel genset

Jit Singh, Bikram; Bakshi, Yash - In: International Journal of Lean Six Sigma 5 (2014) 2, pp. 168-192

Purpose – The aim of this paper is to follow an analytic-deductive approach to realize the issues related to the present power crisis and growing demand of backup power systems (BPSs), especially in India. It not only explores the need of high-cost BPSs in the current scenario but also puts an...

Persistent link: https://www.econbiz.de/10014782838

Enterprise self-assessment analytics for sustainability, resilience and robustness

Edgeman, Rick; A. Williams, Joseph - In: The TQM Journal 26 (2014) 4, pp. 368-381

Purpose – The purpose of this paper is to integrate resilience , robustness , and resplendence ( R 3 ) with sustainable enterprise excellence (SEE) and social-ecological innovation (SEI) that assist firms to progress toward continuously relevant performance proceeding from continuously...

Persistent link: https://www.econbiz.de/10015032085

Sequence analysis with Stata

Brzinsky-Fay, Christian; Kohler, Ulrich; Luniak, Magdalena - In: Stata Journal 6 (2006) 4, pp. 435-460

We describe a general strategy to analyze sequence data and introduce SQ-Ados, a bundle of Stata programs implementing the proposed strategy. The programs include several tools for describing and visualizing sequences as well as a Mata library to perform optimal matching using the Needleman –...

Persistent link: https://www.econbiz.de/10005583354

Speaking Stata: Graphs for all seasons

Cox, Nicholas - In: Stata Journal 6 (2006) 3, pp. 397-419

Time series showing seasonality- marked variation with time of year- are of interest to many scientists, including climatologists, other environmental scientists, epidemiologists, and economists. The usual graphs plotting response variables against time, or even time of year, are not always the...

Persistent link: https://www.econbiz.de/10005583355

Graphical representation of interactions

Barthel, Friederike Maria-Sophie; Royston, Patrick - In: Stata Journal 6 (2006) 3, pp. 348-363

We provide a program to illustrate interactions between treatment and covariates or between two covariates by using forest plots under either the Cox proportional hazards or the logistic regression model. The program is flexible in both the possibility of illustrating more than one interaction...

Persistent link: https://www.econbiz.de/10005748361

Analysis of data from nonorthogonal multi-stratum designs

GILMOUR, Steven G.; GOOS, Peter - Faculteit Toegepaste Economische Wetenschappen, … - 2006

Split-plot and other multi-stratum structures are widely used in factorial and response surface experiments and … factors on the drying rate for freeze dried coffee and find that the main-plot variance component is estimated to be zero. We …. In the classical approach, it is possible to fix the main-plot variance at some positive value, but this is not …

Persistent link: https://www.econbiz.de/10005350864

Guinea; Selected Issues and Statistical Appendix

International Monetary Fund (IMF); International … - 2006

This Selected Issues paper examines the sources of real growth in Guinea. It identifies and quantifies the impact on real GDP growth of both the exogenous shocks and the policy changes that have occurred since 2000. The paper offers, first, some empirical evidence on real GDP growth in Guinea...

Persistent link: https://www.econbiz.de/10005825469

The Utilization-Adjusted Output Gap; Is the Russian Economy Overheating?

Oomes, Nienke; Dynnikova, Oksana - International Monetary Fund (IMF) - 2006

This paper estimates the output gap in Russia using a utilization-adjusted production function approach, which we argue is preferable to traditional output gap methods. The approach amounts to (1) using available surveys to estimate the "natural rates" of capacity and labor utilization above...

Persistent link: https://www.econbiz.de/10005826561