Helena Ribeiro

发表

Consecutive customer losses in oscillating GIX/M//n systems with state dependent services rates

António Pacheco, Helena Ribeiro, A. Pacheco, 2008, Ann. Oper. Res..

Numbers of Served and Lost Customers in Busy-Periods of M/M/1/n Systems with Balking

Fátima Ferreira, António Pacheco, Helena Ribeiro, 2020, ICCSA.

Dye-sensitized solar cells: A safe bet for the future.

Helena Ribeiro, Verónica de Zea Bermudez, Luís Moreira Gonçalves, 2008 .

Consecutive customer loss probabilities in M/G/1/n and GI/M(m)//n systems

Helena Ribeiro, António Pacheco, 2006, SMCtools '06.

Moments of losses during busy-periods of regular and nonpreemptive oscillating MX/G/1/n systems

Fátima Ferreira, António Pacheco, Helena Ribeiro, 2017, Ann. Oper. Res..

A B-LEARNING POSTGRADUATE COURSE IN ADVANCED COSMETOLOGY OF ULISBOA: THE IMPORTANCE OF QUALITY EVALUATION FRAMEWORKS FOR THE SUCCESS OF ONLINE COURSES

Neuza Pedro, Helena Ribeiro, Nikoletta Agonács, 2018 .

On the Blocking Probability and Loss Rates in Nonpreemptive Oscillating Queueing Systems

Fátima Ferreira, António Pacheco, Helena Ribeiro, 2016, ASMTA.

From coffee industry waste materials to skin-friendly products with improved skin fat levels

Helena Ribeiro, Pedro C. Simões, Alexandre Paiva, 2013 .

ANALYSIS OF FINITE OSCILLATING GIX/M(m)//N QUEUEING SYSTEMS

Fátima Ferreira, António Pacheco, Helena Ribeiro, 2009 .

Consecutive customer losses in regular and oscillating MX/G/1/n systems

António Pacheco, Helena Ribeiro, 2008, Queueing Syst. Theory Appl..

Part 2: Delivery Systems and Nanocarriers for Topical Route: Examples and Illustration of Some Therapeutic and Cosmetic Applications

Helena Ribeiro, Andreia Ascenso, Sandra Simões, 2017 .

Distribution of the Number of Losses in Busy-Periods of {M}^{X}/G/1/n Systems

Fátima Ferreira, Helena Ribeiro, António Pacheco, 2013 .

Pollen-based predictive modelling of wine production: application to an arid region

Helena Ribeiro, Mário Cunha, M. Cunha, 2016 .

Influence of atmospheric ozone, PM10 and meteorological factors on the concentration of airborne pollen and fungal spores

Helena Ribeiro, Fernando G. Martins, Maria do Carmo Pereira, 2008 .