COMPARISON OF GDM AND LM ALGORITHMS IN ANN MODELING FOR THE ESTIMATION OF GROUND WATER LEVEL FLUCTUATIONS
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING
Author(s): ATUL KUMAR RAHUL , ISHU BANSAL , K.K. PANDEY
Abstract: The study evaluates forecasting of groundwater level for short period of data by utilizing the standard artificial neural network (ANN) model, trained with two back propagation (BP) training algorithms namely Levenberg-Marquardt (LM) and Gradient Descent with Momentum (GDM). Data of five wells, Annual rainfall, Temperature, Relative humidity and river stage are chosen as input parameters.The model efficiency and accuracy were measured based on the root mean square error (RMSE) and regression coefficient (R).R-values approach towards the unity for most of the wells in LM method. LM method is recommended for forecasting ground water level for short duration of data and also it is anticipated that this method will give fairly accurate result for long duration of data under consideration. In case of constraint on data availability mentioned above, the LM Method is found to be suitable for ground water forecasting even when we take river water level as one of the inputs in ANN model.
- Publication Date: 26-Oct-2014
- DOI: 10.15224/978-1-63248-030-9-21
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EFFECTS OF SODIUM SILICATE AND CITRATE ON MAGNESIUM OXYSULFATE CEMENT
Published In: 2ND INTERNATIONAL CONFERENCE ON ADVANCES IN CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING
Author(s): JIEFEI WANG , MINGFANG BA , SIMIN ZHAO , YINGYING YANG
Abstract: In order to improve the properties of Magnesium Oxysulfate (MOS) Cement, the effects of Citrate and Sodium Silicate with single or double-doped way on water resistance and mechanical strength of MOS cement were investigated. Also scanning electron microscope (SEM) technique was adopted to explain the morphology of phase composition. The experimental results showed that under the condition of 15±3°C，RH=70±5% single Citrate increasing improve the compressive and flexural strength of MOS cement while exert less effect on water resistance of MOS cement. The double-doped Citrate and Sodium Silicate by the mass ratio of 1:2 could both increased 7d flexural strength by twice and compressive strength by 50% and simultaneously largely improve water resistance of MOS cement. SEM results showed that a large number of connected wheat-like-needle hydration products were formed in hardened MOS cement paste with double-doped Citrate and Sodium Silicate.
- Publication Date: 26-Oct-2014
- DOI: 10.15224/978-1-63248-030-9-22
- Views: 0
- Downloads: 0