Results 11 to 20 of about 18,445,969 (262)

Features of the Stressed-Strain State of a Steel-Reinforced-Concrete Span Structure with Preliminary Bending of a Steel Beam

open access: yesNauka ta progres transportu, 2022
Purpose. The authors aim to determine the features of the operation of a steel-reinforced concrete span structure with beams reinforced with an I-beam, with their pre-stressing using the bending of a steel I-beam. Methodology.
M. M. Popovych, S. V. Kliuchnyk
doaj   +1 more source

Water Quality Evaluation and Prediction Based on a Combined Model

open access: yesApplied Sciences, 2023
Along with increasingly serious water pollution, water environmental problems have become major factors that hinder the sustainable development of our economy and society.
Guimei Jiao   +8 more
doaj   +1 more source

A Combined Model Based on CEEMDAN, Permutation Entropy, Gated Recurrent Unit Network, and an Improved Bat Algorithm for Wind Speed Forecasting

open access: yesIEEE Access, 2020
Accurate and reliable wind speed forecasting is crucial for wind farm planning and grid operation security. To improve the accuracy of wind speed forecasting, a novel combined model is proposed for wind speed forecasting in this article.
Tao Liang   +3 more
doaj   +1 more source

Using Field Spectroradiometer to Estimate the Leaf N/P Ratio of Mixed Forest in a Karst Area of Southern China: A Combined Model to Overcome Overfitting

open access: yesRemote Sensing, 2021
The ratio between nitrogen and phosphorus (N/P) in plant leaves has been widely used to assess the availability of nutrients. However, it is challenging to rapidly and accurately estimate the leaf N/P ratio, especially for mixed forest. In this study, we
Wen He   +6 more
doaj   +1 more source

Combined modal split and assignment model for the multimodal transportation network of the economic circle in China [PDF]

open access: yesTransport, 2009
Economic circles have been formed and developing in China. An economic circle consists of more than one closely adjoining central cities and their influence zones.
Sh. Li, W. Deng, Y. Lv
doaj   +3 more sources

Combined Training Center, no. 1.

open access: yes, 2021
Attached is a report covering the combined operations training offered by the Combined Training Center no. 1, located on Madh Island, near Bombay. The report also outlines the cycle of combined operations training for a brigade and its supporting Beach ...
Joint Intelligence Collection Agency; JICA/CBI/SLA; Directorate of Combined Operations (India)
core   +1 more source

Source apportionment of fine particulate matter using combined receptor models in Tehran [PDF]

open access: yesمهندسی عمران شریف, 2022
Currently, one of the most important air pollutants in Tehran is fine particulate matter. The composition and sources of these particles are poorly known; therefore, in order to distinguish the status of PM2.5 pollutants from their chemical compounds, 24-
M. Zare Shahneh, M. Arhami
doaj   +1 more source

Hybrid Short-Term Wind Power Prediction Based on Markov Chain

open access: yesFrontiers in Energy Research, 2022
This article proposes a combined prediction method based on the Markov chain to realize precise short-term wind power predictions. First, three chaotic models are proposed for the prediction of chaotic time series, which can master physical principles in
Liangsong Zhou   +4 more
doaj   +1 more source

Combined Model of Displacement Prediction for Concrete Arch Dam Based onDecomposition and Reconstruction of Monitoring Time Series

open access: yes工程科学与技术, 2022
For the complexity of deformation mechanism of the concrete arch dam and the highly non-linearity of measured value, the explanatory performance of prediction model for dam deformation is important.
Bowen WEI   +4 more
doaj  

Forecasting Emergency Calls With a Poisson Neural Network-Based Assemble Model

open access: yesIEEE Access, 2019
Forecasting emergency calls are of great importance in practice. By forecasting the occurrence of unfortunate events, we can learn from these events and further prevent their occurrence in the future.
Hongyun Huang   +3 more
doaj   +1 more source

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