Privacy Preserving Time Efficient Access Control Aware Keyword Search Over Encrypted Data on Cloud Storage

Wireless Personal Communications - Cloud computing delivers storage service to users accessed via Internet. Infrastructure used to store outsourced data is under the control of the cloud service...     

Task Failure Prediction using Combine Bagging Ensemble (CBE) Classification in Cloud Workflow

Wireless Personal Communications - Scientific applications adopt cloud environment for executing its workflows as tasks. When a task fails, dependency nature of the workflows affects the overall...     

Event Detection and Information Passing Using LEACH Protocol in Wireless Sensor Networks

Wireless Personal Communications - Wireless Sensor Networks plays an important role in creating and developing smart environments. It includes sensors geographically distributed which are...     

Dynamic Ensemble Multivariate Time Series Forecasting Model for PM2.5

In forecasting real time environmental factors, large data is needed to analyse the pattern behind the data values. Air pollution is a major threat towards developing countries and it is proliferating every year. Many methods in time series prediction and deep learning models to estimate the severity of air pollution. Each independent variable contributing towards pollution is necessary to analyse the trend behind the air pollution in that particular locality. This approach selects multivariate time series and coalesce a real time updatable autoregressive model to forecast Particulate matter (PM) PM2.5. To perform experimental analysis the data from the Central Pollution Control Board (CPCB) is used. Prediction is carried out for Chennai with seven locations and estimated PM’s using the weighted ensemble method. Proposed method for air pollution prediction unveiled effective and moored performance in long term prediction. Dynamic budge with high weighted k-models are used simultaneously and devising an ensemble helps to achieve stable forecasting. Computational time of ensemble decreases with parallel processing in each sub model. Weighted ensemble model shows high performance in long term prediction when compared to the traditional time series models like Vector Auto-Regression (VAR), Autoregressive Integrated with Moving Average (ARIMA), Autoregressive Moving Average with Extended terms (ARMEX). Evaluation metrics like Root Mean Square Error (RMSE), Mean Absolute Error (MAE) and the time to achieve the time series are compared.