Showing 2,221 - 2,240 results of 14,154 for search '(improved OR improve) model algorithm', query time: 0.31s Refine Results
  1. 2221

    Study on Short Term Temperature Forecast Model in Jiangxi Province based on LightGBM Machine Learning Algorithm by Kanghui SUN, An XIAO, Houjie XIA

    Published 2024-12-01
    “…In order to achieve further improvement in the forecast accuracy of station temperatures and enhance the forecast capability for extreme temperatures, this study establishes a 24-hour national station daily maximum (minimum) temperature forecast model for Jiangxi Province based on the LightGBM machine-learning algorithm and the MOS forecast framework by using the surface observation data of 91 national stations in Jiangxi Province and the upper-air and surface forecast data of the ECMWF model from 2017 to 2019.The results of the 2020 evaluation show that the LightGBM model daily maximum (minimum) temperature forecast is consistent with the observed trend, and the annual average forecast is better than that of three numerical models, ECMWF, CMA-SH9 and CMA-GFS, two machine learning products, RF and SVM, and subjective revision products.In terms of the spatial and temporal distribution of forecast errors, the model's daily maximum (minimum) temperature forecast errors in winter and spring are slightly larger than those in summer and autumn; the daily maximum temperature forecast errors show the spatial distribution characteristics of "larger in the south and smaller in the north, and larger in the periphery than in the centre", while the opposite is true for the daily minimum temperatures.In terms of important weather processes, the LightGBM model has the best prediction effect among the seven products in the high temperature process; in the strong cold air process, the LightGBM model is still better than the three numerical model products and the other two machine-learning models, but the prediction effect of the daily minimum temperature is not as good as that of the subjective revision products.After a simple empirical correction for the low-temperature forecast error in the strong cold air process, the model low-temperature forecast effect is close to that of the subjective revision product.The model significance analysis shows that the recent surface observation features also contribute to the model construction, and the results can be used as a reference for model improvement and temperature forecast product development.At present, the LightGBM model temperature forecast products have been applied to meteorological operations in Jiangxi Province.…”
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  2. 2222

    Auxiliary Model-Based Multiple Innovation Recursive Algorithm on Nonlinear Systems utilizing KeyTerm Separation Technique by Fang Qiu, Yan Ji

    Published 2025-02-01
    “…For further improving the parameter estimation accuracy, an auxiliary model-based multi-innovation extended least-squares algorithm is presented by using the multi-innovation identification theory. …”
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    Predictive Model for Diagnosis of Gestational Diabetes in the Kurdistan Region by a Combination of Clustering and Classification Algorithms: An Ensemble Approach by Rasool Jader, Sadegh Aminifar

    Published 2022-01-01
    “…Intelligent systems designed by machine learning algorithms are remodelling all fields of our lives, including the healthcare system. …”
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  5. 2225

    A Unique Bifuzzy Manufacturing Service Composition Model Using an Extended Teaching-Learning-Based Optimization Algorithm by Yushu Yang, Jie Lin, Zijuan Hu

    Published 2024-09-01
    “…Next, we address the multi-objective optimization issue through the application of extended teaching-learning-based optimization (ETLBO) algorithm. The improvements of the ETLBO algorithm include utilizing the adaptive parameters and introducing a local search strategy combined with a genetic algorithm (GA). …”
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  6. 2226

    Integrated Modeling and Optimal Operation Strategy of Building Cooling System Combining the Standardized Thermal Resistance and Genetic Algorithm by Liang Tian, Bohong Lai, Tianzhen Yang, Xingce Wang, Junhong Hao, Kaicheng Liu

    Published 2025-01-01
    “…ABSTRACT Integrated modeling and operation optimization of building energy systems is significant for improving the energy utilization efficiency and reducing carbon emission. …”
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    Revolutionizing proton exchange membrane fuel cell modeling through hybrid aquila optimizer and arithmetic algorithm optimization by Manish Kumar Singla, S. A. Muhammed Ali, Ramesh Kumar, Pradeep Jangir, Mohammad Khishe, G. Gulothungan, Haitham A. Mahmoud

    Published 2025-02-01
    “…For each datasheet, both Current–Voltage (I/V) and Power–Voltage (P/V) characteristics of the PEMFCs scenarios closely aligned with those observed in experimental data, affirming AOAAO’s superior accuracy, robustness, and time efficiency for real-time fuel cell modeling. In terms of computational efficiency, AOAAO runtime is significantly faster than all compared algorithms, demonstrating an efficiency improvement of approximately 98%.…”
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  10. 2230

    Estimating Nurse Workload Using a Predictive Model From Routine Hospital Data: Algorithm Development and Validation by Paul Meredith, Christina Saville, Chiara Dall’Ora, Tom Weeks, Sue Wierzbicki, Peter Griffiths

    Published 2025-07-01
    “…ObjectiveThe objective of this study is to explore whether an algorithm could estimate ward workload using existing routinely recorded data. …”
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    Heat Pump Temperature Trajectory Planning Algorithm for Bus Voltage Sag Suppression by Yangyang ZHAO, Lan LIU, Wei ZHAO, Shuang ZENG, Anqi LIANG, Hanqiu WANG, Kai MA

    Published 2023-05-01
    “…The simulation results show that the proposed algorithm can significantly suppress the transient sag of DC bus voltage in the process of heat pump temperature regulation, which are well suited to the smooth control and improving stability of building’s DC microgrid system.…”
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    Feedforward Factorial Hidden Markov Model by Zhongxing Peng, Wei Huang, Yinghui Zhu

    Published 2025-04-01
    “…In the direct FFHMM, alterations to one sub-hidden Markov model (HMM) do not affect the others, enabling individual improvements in HMM estimation. …”
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