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Open Access
Article
Publication date: 13 August 2020

Mariam AlKandari and Imtiaz Ahmad

Solar power forecasting will have a significant impact on the future of large-scale renewable energy plants. Predicting photovoltaic power generation depends heavily on climate…

10651

Abstract

Solar power forecasting will have a significant impact on the future of large-scale renewable energy plants. Predicting photovoltaic power generation depends heavily on climate conditions, which fluctuate over time. In this research, we propose a hybrid model that combines machine-learning methods with Theta statistical method for more accurate prediction of future solar power generation from renewable energy plants. The machine learning models include long short-term memory (LSTM), gate recurrent unit (GRU), AutoEncoder LSTM (Auto-LSTM) and a newly proposed Auto-GRU. To enhance the accuracy of the proposed Machine learning and Statistical Hybrid Model (MLSHM), we employ two diversity techniques, i.e. structural diversity and data diversity. To combine the prediction of the ensemble members in the proposed MLSHM, we exploit four combining methods: simple averaging approach, weighted averaging using linear approach and using non-linear approach, and combination through variance using inverse approach. The proposed MLSHM scheme was validated on two real-time series datasets, that sre Shagaya in Kuwait and Cocoa in the USA. The experiments show that the proposed MLSHM, using all the combination methods, achieved higher accuracy compared to the prediction of the traditional individual models. Results demonstrate that a hybrid model combining machine-learning methods with statistical method outperformed a hybrid model that only combines machine-learning models without statistical method.

Details

Applied Computing and Informatics, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2634-1964

Keywords

Open Access
Article
Publication date: 22 September 2023

Richard Kwame Adom, Mulala Danny Simatele, Dillip Kumar Das, Kalumba Ahmed Mukalazi, Mazinyo Sonwabo, Lindelani Mudau, Mikateko Sithole, Serge Kubanza, Coleen Vogel and Leocadia Zhou

Globally, climate change governance continues to be a significant challenge to policymakers, environmentalists and politicians despite international summits, conferences and…

1251

Abstract

Purpose

Globally, climate change governance continues to be a significant challenge to policymakers, environmentalists and politicians despite international summits, conferences and programmes designed to find sustainable solutions to the climate change crises. Climate change continues to be viewed primarily as a challenge for the future, whereas many leaders and administrators globally regard it as an environmental issue rather than a challenge that encompasses all aspects of life. In South Africa, these misleading perceptions of climate change continue to prevail both at national and local levels. The government and private organisations do not attach the required levels of urgency needed to address the climate change crisis. While numerous policies and institutions have been established to address these challenges, they lack financial backing, coordination and synergy that cut across the broad objectives of environmental, social and economic agendas. Additionally, weak, eroding trust and manipulating of institutions continue to hinder effective policy implementation and focus-driven governance. This paper aims to explore the structural and governance weaknesses of climate change administration in the KwaZulu-Natal province and South Africa in general.

Design/methodology/approach

This paper used extensive literature reviews and a triangulated approach to investigate the weaknesses of the current governance structure in the context of institutional and capacity constraints.

Findings

The findings uncovered that most institutions and organisations mandated to address climate change challenges operate in silos, lack required investment and capacity and have weak accountability mechanisms with a shallow understanding of climate change governance.

Originality/value

This paper recommends better coordination between national, provincial and local governments as well as the private sector towards climate change activities and capacity to ensure that climate change actions are effectively implemented.

Details

International Journal of Climate Change Strategies and Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 1756-8692

Keywords

Open Access
Article
Publication date: 29 April 2024

Dada Zhang and Chun-Hsing Ho

The purpose of this paper is to investigate the vehicle-based sensor effect and pavement temperature on road condition assessment, as well as to compute a threshold value for the…

Abstract

Purpose

The purpose of this paper is to investigate the vehicle-based sensor effect and pavement temperature on road condition assessment, as well as to compute a threshold value for the classification of pavement conditions.

Design/methodology/approach

Four sensors were placed on the vehicle’s control arms and one inside the vehicle to collect vibration acceleration data for analysis. The Analysis of Variance (ANOVA) tests were performed to diagnose the effect of the vehicle-based sensors’ placement in the field. To classify road conditions and identify pavement distress (point of interest), the probability distribution was applied based on the magnitude values of vibration data.

Findings

Results from ANOVA indicate that pavement sensing patterns from the sensors placed on the front control arms were statistically significant, and there is no difference between the sensors placed on the same side of the vehicle (e.g., left or right side). A reference threshold (i.e., 1.7 g) was computed from the distribution fitting method to classify road conditions and identify the road distress based on the magnitude values that combine all acceleration along three axes. In addition, the pavement temperature was found to be highly correlated with the sensing patterns, which is noteworthy for future projects.

Originality/value

The paper investigates the effect of pavement sensors’ placement in assessing road conditions, emphasizing the implications for future road condition assessment projects. A threshold value for classifying road conditions was proposed and applied in class assignments (I-17 highway projects).

Details

Built Environment Project and Asset Management, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2044-124X

Keywords

Open Access
Article
Publication date: 25 March 2021

Fareed Sheriff

This paper presents the Edge Load Management and Optimization through Pseudoflow Prediction (ELMOPP) algorithm, which aims to solve problems detailed in previous algorithms;…

2014

Abstract

Purpose

This paper presents the Edge Load Management and Optimization through Pseudoflow Prediction (ELMOPP) algorithm, which aims to solve problems detailed in previous algorithms; through machine learning with nested long short-term memory (NLSTM) modules and graph theory, the algorithm attempts to predict the near future using past data and traffic patterns to inform its real-time decisions and better mitigate traffic by predicting future traffic flow based on past flow and using those predictions to both maximize present traffic flow and decrease future traffic congestion.

Design/methodology/approach

ELMOPP was tested against the ITLC and OAF traffic management algorithms using a simulation modeled after the one presented in the ITLC paper, a single-intersection simulation.

Findings

The collected data supports the conclusion that ELMOPP statistically significantly outperforms both algorithms in throughput rate, a measure of how many vehicles are able to exit inroads every second.

Originality/value

Furthermore, while ITLC and OAF require the use of GPS transponders and GPS, speed sensors and radio, respectively, ELMOPP only uses traffic light camera footage, something that is almost always readily available in contrast to GPS and speed sensors.

Details

Applied Computing and Informatics, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2634-1964

Keywords

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