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Your search keyword '"Martinez, Roberto"' showing total 226 results
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226 results on '"Martinez, Roberto"'

1. Data-Driven Model For Heat Load Prediction In Buildings Connected To District Heating Networks

Author

Hajri, Alaeddine, Garay-Martinez, Roberto, Macarulla, Ana Maria, and Sassi, Mohamed Amin Ben

Subjects
Statistics - Applications
Abstract

In this study we investigate the heat load patterns in one building using multi-step forecasting model. We combine the Autoregressive models that use multiple eXogenous variables (ARX) with Seasonally adaptable Time of Week and Climate dependent models (S-TOW-C) (to correct model inaccuracies), to obtain a robust and accurate regression model that we called S-TOW-C-ARX used in time series forecasting. Based on the experiment results, it has been shown that the proposed model is suitable for short term heat load forecasting. The best forecasting performance is achieved in winter term where the prediction values are from 4 to 20 % away from the targets, which are commonly seen as very good values.

Published
2023

6. CONSUMO DE FRUTAS TROPICAIS NA AMAZÔNIA OCIDENTAL

Author

Lima, Marcus Vinicius Gonçalves, primary, Melo, Edmar Rober de, additional, Neto, Leila Santos, additional, Santi, Adalberto, additional, Martinez, Roberto Antonio Savelli, additional, Magalhães, Marcio Osvaldo Lima, additional, Lima, Mateus Bandeira, additional, and Castro, Pedro Ivo Prudêncio, additional

Published
2024
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12. Recent Update on the Recovery of Various Metals from Wastewater

Author

Rubio-Franchini, Isidoro, Alvarado-Flores, Jesús, Martínez, Roberto Rico, G. Kostianoy, Andrey, Series Editor, Carpenter, Angela, Editorial Board Member, Younos, Tamim, Editorial Board Member, Scozzari, Andrea, Editorial Board Member, Vignudelli, Stefano, Editorial Board Member, Kouraev, Alexei, Editorial Board Member, Singh, Pardeep, editor, Verma, Pramit, editor, and Singh, Ravindra Pratap, editor

Published
2023
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13. Recovery of Nutrients from Wastewater

Author

Pérez-Legaspi, Ignacio Alejandro, Santos-Medrano, Gustavo Emilio, Rubio-Franchini, Isidoro, Martínez, Roberto Rico, G. Kostianoy, Andrey, Series Editor, Carpenter, Angela, Editorial Board Member, Younos, Tamim, Editorial Board Member, Scozzari, Andrea, Editorial Board Member, Vignudelli, Stefano, Editorial Board Member, Kouraev, Alexei, Editorial Board Member, Singh, Pardeep, editor, Verma, Pramit, editor, and Singh, Ravindra Pratap, editor

Published
2023
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14. Future Research on the Sustainable Utilization of Wastewater as Resources with Emphasis on Plastics

Author

Santos-Medrano, Gustavo Emilio, Robles-Vargas, Daniel, Pérez-Legaspi, Ignacio Alejandro, Rico-Martínez, Roberto, G. Kostianoy, Andrey, Series Editor, Carpenter, Angela, Editorial Board Member, Younos, Tamim, Editorial Board Member, Scozzari, Andrea, Editorial Board Member, Vignudelli, Stefano, Editorial Board Member, Kouraev, Alexei, Editorial Board Member, Singh, Pardeep, editor, Verma, Pramit, editor, and Singh, Ravindra Pratap, editor

Published
2023
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23. Introduction

Author

Garay-Martinez, Roberto, Garrido-Marijuan, Antonio, Garay-Martinez, Roberto, editor, and Garrido-Marijuan, Antonio, editor

Published
2022
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36. A data-driven model for the analysis of energy consumption in buildings

Author

Borgato Nicola, Prataviera Enrico, Bordignon Sara, Garay-Martinez Roberto, and Zarrella Angelo

Subjects
Environmental sciences, GE1-350
Abstract

Data-driven models are gaining traction in Building Energy Simulation, driven by the increasing role of smart metering and control in buildings. This paper aims to enhance the knowledge in this sector by introducing a practical method to analyse heating consumption. The methodology involves the analysis of hourly total heating demand and outdoor temperature measurements to create and calibrate Energy Signature Curves. Importantly, the building Energy Signature Curve is calibrated independently for each daily hour, resulting in a subset of 24 data-driven models. After calibration, a disaggregation algorithm is proposed to distinguish space heating from domestic hot water usage. The method also evaluates the building’s thermal inertia, examining the correlation between the hourly global energy consumption and the outdoor air temperature moving average. It also presents a methodology for improving the DHW heat consumption model. The methodology is applied to a case study of 51 buildings in Tartu, Estonia, with complete yearly demand measurements from the district heating operator. Thanks to the hourly calibration approach, R2 is 0.05 higher on average than the yearly Energy Signature Curve approach. The difference between estimated and measured annual energy consumption is 8% on average, demonstrating the practicality and effectiveness of the proposed method.

Published
2024
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43. Contemporary Research and Debated Issues on John the Baptist.

Author

Martinez, Roberto

Subjects
*SCHOLARLY method, *ESCHATOLOGY, *PREACHING
Abstract

This article surveys recent studies about John the Baptist, focusing on disputed issues in contemporary research about this historical figure. After briefly reviewing the history of research as a framework for this survey, a presentation of the major contributions on John during the last decades follows. The article then reports on the status quaestionis of some still debated subjects related to the Baptist, such as the content of his message, portrayal as Elijah, relationship to Jesus, baptism, the account in Josephus, association with the Essenes/Qumran, and other minor matters. The work concludes by assessing what the author considers the most important research shifts and contributions of studies on John the Baptist in recent scholarship. [ABSTRACT FROM AUTHOR]

Published
2024
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45. Acoustic response of structured and randomized porous blunt trailing edges subject to turbulent boundary layers.

Author

Arcondoulis, Elias J. G., Ragni, Daniele, Fiscaletti, Daniele, Merino-Martinez, Roberto, and Liu, Yu

Subjects
TURBULENT boundary layer, NOISE control, POROUS materials, ACOUSTIC radiators, FLOW velocity
Abstract

The attachment of porous media to a blunt trailing edge (TE) can significantly suppress vortex shedding processes and the related tonal noise, yet the near-wall and internal flow fields of porous media are difficult to analyze experimentally and rely on numerical simulations to elucidate the internal flow features. A structured porous trailing edge (SPTE) has been recently designed that follows a methodology of a structured porous coated cylinder. The SPTE acoustic response was compared against randomized porous media with 10 and 30 pores/in. in an anechoic wind tunnel over a range of flow velocities. Acoustic beamforming revealed that the dominant acoustic sources were at the end of the solid plate, even when a porous TE was attached. A region of integration was used to extract acoustic spectra without additional noise sources, revealing that the SPTE possesses superior noise reduction capability. Dipolar directivity patterns were observed at the vortex shedding frequency for each TE, and the coherence between microphones revealed the complex acoustic propagation of the high-frequency content. A wavelet analysis revealed how the SPTE breaks periodic vortex shedding cycles into smaller cycles over a wider frequency range, leading to an overall noise reduction relative to the other TEs. [ABSTRACT FROM AUTHOR]

Published
2024
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