{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,2]],"date-time":"2026-05-02T07:00:03Z","timestamp":1777705203175,"version":"3.51.4"},"reference-count":39,"publisher":"SAGE Publications","issue":"4","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IFS"],"published-print":{"date-parts":[[2024,4,18]]},"abstract":"<jats:p>This study proposes a weighted composite approach for grey relational analysis (GRA) that utilizes a numerical weather prediction (NWP) and support vector machine (SVM). The approach is optimized using an improved grey wolf optimization (IGWO) algorithm. Initially, the dimension of NWP data is decreased by t-distributed stochastic neighbor embedding (t-SNE), then the weight of sample coefficients is calculated by entropy-weight method (EWM), and the weighted grey relational of data points is calculated for different weather numerical time series data. At the same time, a new weighted composite grey relational degree is formed by combining the weighted cosine similarity of NWP values of the historical day and to be measured day. The SVM\u2019s regression power prediction model is constructed by the time series data. To improve the accuracy of the system\u2019s predictions, the grey relational time series data is chosen as the input variable for the SVM, and the influence parameters of the ideal SVM are discovered using the IGWO technique. According to the simulated prediction and analysis based on NWP, it can be observed that the proposed method in this study significantly improves the prediction accuracy of the data. Specifically, evaluation metrics such as root mean squared error (RMSE), regression correlation coefficient (r2), mean absolute error (MAE) and mean absolute percent error (MAPE) all show corresponding enhancements, while the computational burden remains relatively low.<\/jats:p>","DOI":"10.3233\/jifs-237333","type":"journal-article","created":{"date-parts":[[2024,3,8]],"date-time":"2024-03-08T10:16:09Z","timestamp":1709892969000},"page":"10847-10862","source":"Crossref","is-referenced-by-count":0,"title":["Method for wind power forecasting based on support vector machines optimized and weighted composite gray relational analysis"],"prefix":"10.1177","volume":"46","author":[{"given":"Miaona","family":"You","sequence":"first","affiliation":[{"name":"Zhanjiang University of Science and Technology, Zhanjiang, China"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sumei","family":"Zhuang","sequence":"additional","affiliation":[{"name":"Zhanjiang University of Science and 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