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      Computer vision by unsupervised machine learning in seed drying process Translated title: Visão computacional por aprendizado de máquina não supervisionado no processo de secagem de sementes

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          Abstract

          ABSTRACT Analyzing the impact of harvest-time drying data is crucial for successful storage and maintaining regulatory seed quality. This study aimed to assess the performance of fixed and mobile dryers using machine learning techniques. Data were collected from convective dryers, including the total number of dryers used, drying time (in hours), moisture percentages at the product’s entrance and exit, and the humidity difference between them. The study employed the Filtered Clusterer model, which utilizes the Simple K-Means technique and the Resample filter to group data based on similarities. The findings indicated distinct differences between fixed and mobile drying systems, with well-defined variations within each system. The algorithm, combined with the applied filters, proved effective in unsupervised classification by identifying and reducing inter-cluster similarity within the fixed system, thereby creating distinct classes within the dataset. In conclusion, the algorithm successfully clustered the scattered dataset and accurately classified and minimized inter-cluster similarity within the fixed system. Conversely, the mobile system exhibited low drying efficiency.

          Translated abstract

          RESUMO Analisar os efeitos de dados de secagem em época de safra é primordial para o sucesso do armazenamento, além de manter a qualidade fisiológica das sementes. O objetivo com este trabalho foi avaliar o desempenho de secagem em secadores fixo e móveis através de aprendizado de máquinas. Os dados foram coletados de secadores convectivos, com base em: i) total de secadores trabalhados; ii) tempo de duração de secagem (horas); iii) percentual de umidade na entrada e saída do produto (%); e iv) diferenças de umidade entres ambas (%). Foi utilizado o modelo Filtered Clusterer, baseado na técnica Simple K-Means e filtro Resample, para agrupar dados com base em suas similaridades. Os resultados apresentados demonstram que o sistema de secagem é distinto entre os equipamentos fixo e móvel, com diferenças bem definidas dentro dos sistemas de secagem estabelecidos. O algoritmo juntamente com os filtros demonstrou ser eficiente na classificação não supervisionada, identificando e minimizando similaridade inter-cluster do sistema fixo definindo em classes distintas dentro do conjunto de dados. Conclui-se, que o conjunto de dados dispersos são agrupados de modo que o algoritmo classifica e minimiza similaridade inter-cluster do sistema fixo com alta precisão. Por outro lado, o desempenho da secagem em sistema móvel apresentou baixa eficiência.

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          Vector Quantization and Signal Compression

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            Interactive machine learning for health informatics: when do we need the human-in-the-loop?

            Machine learning (ML) is the fastest growing field in computer science, and health informatics is among the greatest challenges. The goal of ML is to develop algorithms which can learn and improve over time and can be used for predictions. Most ML researchers concentrate on automatic machine learning (aML), where great advances have been made, for example, in speech recognition, recommender systems, or autonomous vehicles. Automatic approaches greatly benefit from big data with many training sets. However, in the health domain, sometimes we are confronted with a small number of data sets or rare events, where aML-approaches suffer of insufficient training samples. Here interactive machine learning (iML) may be of help, having its roots in reinforcement learning, preference learning, and active learning. The term iML is not yet well used, so we define it as “algorithms that can interact with agents and can optimize their learning behavior through these interactions, where the agents can also be human.” This “human-in-the-loop” can be beneficial in solving computationally hard problems, e.g., subspace clustering, protein folding, or k-anonymization of health data, where human expertise can help to reduce an exponential search space through heuristic selection of samples. Therefore, what would otherwise be an NP-hard problem, reduces greatly in complexity through the input and the assistance of a human agent involved in the learning phase.
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              Phenolic acids from vegetables: A review on processing stability and health benefits

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                Author and article information

                Journal
                cagro
                Ciência e Agrotecnologia
                Ciênc. agrotec.
                Editora da UFLA (Lavras, MG, Brazil )
                1413-7054
                1981-1829
                2023
                : 47
                : e018922
                Affiliations
                [3] Pelotas Rio Grande do Sul orgnameUniversidade Federal de Pelotas orgdiv1Faculdade de Agronomia Eliseu Maciel/FAEM Brazil
                [2] Pelotas Rio Grande do Sul orgnameUniversidade Federal de Pelotas orgdiv1Centro de Engenharias/CENG Brazil
                [1] Rio Branco AC orgnameInstituto Nacional de Pesquisas da Amazônia/INPA orgdiv1Núcleo de Pesquisas do Acre/NPAC Brazil
                Article
                S1413-70542023000100223 S1413-7054(23)04700000223
                10.1590/1413-7054202347018922
                89f6e1a1-6298-4ae6-9b65-45d7af797afe

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 18 December 2022
                : 17 March 2023
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 22, Pages: 0
                Product

                SciELO Brazil

                Categories
                Agricultural Sciences

                Inteligência artificial,post-harvest technology.,digital agriculture,Artificial intelligence,tecnologia de pós-colheita.,agricultura digital

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