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NICE^k Metrics: Unified and Multidimensional Framework for Evaluating Deterministic Solar Forecasting Accuracy
Voyant, Cyril, Despotovic, Milan, Garcia-Gutierrez, Luis, Silva, Rodrigo Amaro e, Lauret, Philippe, Soubdhan, Ted, Bailek, Nadjem
Accurate solar energy output prediction is key for integrating renewables into grids, maintaining stability, and improving energy management. However, standard error metrics such as Root Mean Squared Error (RMSE), Mean Absolute Error (MAE), and Skill Scores (SS) fail to capture the multidimensional nature of solar irradiance forecasting. These metrics lack sensitivity to forecastability, rely on arbitrary baselines (e.g., clear-sky models), and are poorly suited for operational use. To address this, we introduce the NICEk framework (Normalized Informed Comparison of Errors, with k = 1, 2, 3, Sigma), offering a robust and interpretable evaluation of forecasting models. Each NICEk score corresponds to an Lk norm: NICE1 targets average errors, NICE2 emphasizes large deviations, NICE3 highlights outliers, and NICESigma combines all. Using Monte Carlo simulations and data from 68 stations in the Spanish SIAR network, we evaluated methods including autoregressive models, extreme learning, and smart persistence. Theoretical and empirical results align when assumptions hold (e.g., R^2 ~ 1.0 for NICE2). Most importantly, NICESigma consistently shows higher discriminative power (p < 0.05), outperforming traditional metrics (p > 0.05). The NICEk metrics exhibit stronger statistical significance (e.g., p-values from 10^-6 to 0.004 across horizons) and greater generalizability. They offer a unified and operational alternative to standard error metrics in deterministic solar forecasting.
- Europe > Portugal > Coimbra > Coimbra (0.04)
- Africa > Middle East > Algeria > Adrar Province > Adrar (0.04)
- Europe > Serbia > Šumadija and Western Serbia > Šumadija District > Kragujevac (0.04)
- (7 more...)
- Research Report > New Finding (1.00)
- Research Report > Experimental Study (1.00)
- Energy > Renewable > Solar (1.00)
- Energy > Power Industry (1.00)
FASSILA: A Corpus for Algerian Dialect Fake News Detection and Sentiment Analysis
Abdedaiem, Amin, Dahou, Abdelhalim Hafedh, Cheragui, Mohamed Amine, Mathiak, Brigitte
Building a corpus become an important topic in natural language processing (NLP) and especially for low resource languages (ex: AD), due to the importance that the corpus plays in the development of several tools, such as: Machine Translation Babaali and Salem [2022], Part of speech tagging Chiche and Yitagesu [2022], Named entities recognition Jarrar et al. [2022], etc. in particular with the emergence of techniques based on statistics, machine learning and deep learning. Who exploits this mass of information to develop, train and evaluate models. However, building a corpus is not an easy task Bakari et al. [2016]; it is extremely time-consuming and requires a lot of work, for the good reason that the volume and quality of the corpus are two important parameters. Despite the recent emergence of techniques that consume fewer resources, such as few-shot learning Tunstall et al. [2022]. Over the last few years, a lot of studies in NLP have focused on languages or variants of languages called low resources Mengoni and Santucci [2023]. This change of direction is mainly due to the emergence of social media such as Facebook, Twitter, RenRen, LinkedIn, Google+, and Tuenti, as a means of communication where people exchange messages and comments.
- Africa > Middle East > Algeria > Adrar Province > Adrar (0.04)
- Europe > Germany (0.04)
- North America > United States (0.04)
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A Survey on Semantic Modeling for Building Energy Management
Aniakor, Miracle, Cogo, Vinicius V., Ferreira, Pedro M.
Buildings account for a substantial portion of global energy consumption. Reducing buildings' energy usage primarily involves obtaining data from building systems and environment, which are instrumental in assessing and optimizing the building's performance. However, as devices from various manufacturers represent their data in unique ways, this disparity introduces challenges for semantic interoperability and creates obstacles in developing scalable building applications. This survey explores the leading semantic modeling techniques deployed for energy management in buildings. Furthermore, it aims to offer tangible use cases for applying semantic models, shedding light on the pivotal concepts and limitations intrinsic to each model. Our findings will assist researchers in discerning the appropriate circumstances and methodologies for employing these models in various use cases.
- North America > United States > California > Santa Clara County > Palo Alto (0.04)
- North America > United States > California > Alameda County > Berkeley (0.04)
- Europe > Portugal > Lisbon > Lisbon (0.04)
- (3 more...)
- Research Report > New Finding (1.00)
- Overview (1.00)
- Energy > Power Industry (1.00)
- Construction & Engineering (1.00)
- Transportation > Ground > Road (0.46)
RS5M and GeoRSCLIP: A Large Scale Vision-Language Dataset and A Large Vision-Language Model for Remote Sensing
Zhang, Zilun, Zhao, Tiancheng, Guo, Yulong, Yin, Jianwei
Pre-trained Vision-Language Models (VLMs) utilizing extensive image-text paired data have demonstrated unprecedented image-text association capabilities, achieving remarkable results across various downstream tasks. A critical challenge is how to make use of existing large-scale pre-trained VLMs, which are trained on common objects, to perform the domain-specific transfer for accomplishing domain-related downstream tasks. A critical challenge is how to make use of existing large-scale pre-trained VLMs, which are trained on common objects, to perform the domain-specific transfer for accomplishing domain-related downstream tasks. In this paper, we propose a new framework that includes the Domain pre-trained Vision-Language Model (DVLM), bridging the gap between the General Vision-Language Model (GVLM) and domain-specific downstream tasks. Moreover, we present an image-text paired dataset in the field of remote sensing (RS), RS5M, which has 5 million RS images with English descriptions. The dataset is obtained from filtering publicly available image-text paired datasets and captioning label-only RS datasets with pre-trained VLM. These constitute the first large-scale RS image-text paired dataset. Additionally, we fine-tuned the CLIP model and tried several Parameter-Efficient Fine-Tuning methods on RS5M to implement the DVLM. Experimental results show that our proposed dataset is highly effective for various tasks, and our model GeoRSCLIP improves upon the baseline or previous state-of-the-art model by $3\%\sim20\%$ in Zero-shot Classification (ZSC), $3\%\sim6\%$ in Remote Sensing Cross-Modal Text-Image Retrieval (RSCTIR) and $4\%\sim5\%$ in Semantic Localization (SeLo) tasks. Dataset and models have been released in: \url{https://github.com/om-ai-lab/RS5M}.
- North America > United States > California > San Francisco County > San Francisco (0.14)
- North America > United States > Maryland > St. Mary's County (0.14)
- South America > Chile > Santiago Metropolitan Region > Santiago Province > Santiago (0.04)
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- Research Report > New Finding (0.65)
- Research Report > Promising Solution (0.47)
Pneumonia Detection on chest X-ray images Using Ensemble of Deep Convolutional Neural Networks
Mabrouk, Alhassan, Redondo, Rebeca P. Díaz, Dahou, Abdelghani, Elaziz, Mohamed Abd, Kayed, Mohammed
neumonia is a life-threatening lung infection resulting from several different viral infections. Identifying and treating pneumonia on chest X-ray images can be difficult due to its similarity to other pulmonary diseases. Thus, the existing methods for predicting pneumonia cannot attain substantial levels of accuracy. Therefore, this paper presents a computer-aided classification of pneumonia, coined as Ensemble Learning (EL), to simplify the diagnosis process on chest X-ray images. Our proposal is based on Convolutional Neural Network (CNN) models, which are pre-trained CNN models that have been recently employed to enhance the performance of many medical tasks instead of training CNN models from scratch. We propose to use three well-known CNN pre-trained (DenseNet169, MobileNetV2 and Vision Transformer) using the ImageNet database. Then, these models are trained on the chest X-ray data set using fine-tuning. Finally, the results are obtained by combining the extracted features from these three models during the experimental phase. The proposed EL approach outperforms other existing state-of-the-art methods, and it obtains an accuracy of 93.91% and a F1-Score of 93.88% on the testing phase. Identifying and treating pneumonia on chest X-ray images can be difficult due to its similarity to other pulmonary diseases. Thus, the existing methods for predicting pneumonia cannot attain substantial levels of accuracy. Therefore, this paper presents a computer-aided classification of pneumonia, coined as Ensemble Learning (EL), to simplify the diagnosis process on chest X-ray images. Our proposal is based on Convolutional Neural Network (CNN) models, which are pretrained CNN models that have been recently employed to enhance the performance of many medical tasks instead of training CNN models from scratch.
- Europe > Spain (0.14)
- Africa > Middle East > Egypt > Beni Suef Governorate > Beni Suef (0.05)
- Asia > Middle East > UAE > Ajman Emirate > Ajman (0.04)
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- Research Report > Promising Solution (0.48)
- Research Report > New Finding (0.46)
Medical Image Classification Using Transfer Learning and Chaos Game Optimization on the Internet of Medical Things
Mabrouk, Alhassan, Dahou, Abdelghani, Elaziz, Mohamed Abd, Redondo, Rebeca P. Díaz, Kayed, Mohammed
The Internet of Medical Things (IoMT) has dramatically benefited medical professionals that patients and physicians can access from all regions. Although the automatic detection and prediction of diseases such as melanoma and leukemia is still being researched and studied in IoMT, existing approaches are not able to achieve a high degree of efficiency. Thus, with a new approach that provides better results, patients would access the adequate treatments earlier and the death rate would be reduced. Therefore, this paper introduces an IoMT proposal for medical images classification that may be used anywhere, i.e. it is an ubiquitous approach. It was design in two stages: first, we employ a Transfer Learning (TL)-based method for feature extraction, which is carried out using MobileNetV3; second, we use the Chaos Game Optimization (CGO) for feature selection, with the aim of excluding unnecessary features and improving the performance, which is key in IoMT. Our methodology was evaluated using ISIC-2016, PH2, and Blood-Cell datasets. The experimental results indicated that the proposed approach obtained an accuracy of 88.39% on ISIC-2016, 97.52% on PH2, and 88.79% on Blood-cell. Moreover, our approach had successful performances for the metrics employed compared to other existing methods.
- Europe > Spain (0.14)
- Africa > Middle East > Egypt > Beni Suef Governorate > Beni Suef (0.04)
- Asia > Middle East > UAE > Ajman Emirate > Ajman (0.04)
- (3 more...)
- Research Report > New Finding (0.92)
- Instructional Material > Course Syllabus & Notes (0.71)
- Instructional Material > Online (0.61)
- Health & Medicine > Therapeutic Area > Neurology (1.00)
- Health & Medicine > Therapeutic Area > Immunology (1.00)
- Health & Medicine > Diagnostic Medicine > Imaging (1.00)
- Health & Medicine > Therapeutic Area > Oncology > Skin Cancer (0.35)
Flickr Africa: Examining Geo-Diversity in Large-Scale, Human-Centric Visual Data
Naggita, Keziah, LaChance, Julienne, Xiang, Alice
Biases in large-scale image datasets are known to influence the performance of computer vision models as a function of geographic context. To investigate the limitations of standard Internet data collection methods in low- and middle-income countries, we analyze human-centric image geo-diversity on a massive scale using geotagged Flickr images associated with each nation in Africa. We report the quantity and content of available data with comparisons to population-matched nations in Europe as well as the distribution of data according to fine-grained intra-national wealth estimates. Temporal analyses are performed at two-year intervals to expose emerging data trends. Furthermore, we present findings for an ``othering'' phenomenon as evidenced by a substantial number of images from Africa being taken by non-local photographers. The results of our study suggest that further work is required to capture image data representative of African people and their environments and, ultimately, to improve the applicability of computer vision models in a global context.
- Asia > Brunei (0.14)
- North America > Canada > Quebec > Montreal (0.06)
- Africa > Sierra Leone (0.06)
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- Health & Medicine (0.92)
- Information Technology > Services (0.75)
- Government > Regional Government (0.46)
- Information Technology > Communications > Social Media (1.00)
- Information Technology > Artificial Intelligence > Vision (1.00)
Multi-Step Short-Term Wind Speed Prediction with Rank Pooling and Fast Fourier Transformation
Short-term wind speed prediction is essential for economical wind power utilization. The real-world wind speed data is typically intermittent and fluctuating, presenting great challenges to existing shallow models. In this paper, we present a novel deep hybrid model for multi-step wind speed prediction, namely LR-FFT-RP-MLP/LSTM (Linear Fast Fourier Transformation Rank Pooling Multiple-Layer Perception/Long Short-Term Memory). Our hybrid model processes the local and global input features simultaneously. We leverage Rank Pooling (RP) for the local feature extraction to capture the temporal structure while maintaining the temporal order. Besides, to understand the wind periodic patterns, we exploit Fast Fourier Transformation (FFT) to extract global features and relevant frequency components in the wind speed data. The resulting local and global features are respectively integrated with the original data and are fed into an MLP/LSTM layer for the initial wind speed predictions. Finally, we leverage a linear regression layer to collaborate these initial predictions to produce the final wind speed prediction. The proposed hybrid model is evaluated using real wind speed data collected from 2010 to 2020, demonstrating superior forecasting capabilities when compared to state-of-the-art single and hybrid models. Overall, this study presents a promising approach for improving the accuracy of wind speed forecasting.
- North America > Trinidad and Tobago > Trinidad > Arima > Arima (0.05)
- North America > United States > North Dakota (0.04)
- North America > United States > Colorado > Jefferson County > Golden (0.04)
- (6 more...)