The Method of Communication System Fault Diagnosis Based on Deep Belief Net

To meet the need of fault diagnosis for military communication system, an effective method based on deep belief (DBN) net is proposed. During the fault diagnosis, the bottom layer of DBN model is used to receive the input fault signals to extract the fault features and the fault classification results will be outputted after softmax classified. Accordingly, algorithms for DBN model and training and RBM parameter learning have been designed. To reduce the running time, parallel solutions based on MapReduce framework have been provided. In order to test and verify the effect of DBN fault diagnosis, the communication experiment system is built in the laboratory which the output signals of the transmitter and the receiver are measured and collected as the original data for further learning and training. Compared with the traditional fault diagnosis methods, it can be found that DBN method has high accuracy in fault diagnosis and the process is simple and friendly. It is impossible to realize real-time diagnosis and online diagnosis for the communication system. The research can be applicated to the health management of communication equipment, and it will provide advanced technical support and software program for the health of communication equipment

Flood Risk Literacy: Communication and Implications for Protective Action

Flooding is among the costliest natural disasters in the United States. Research indicates that flood risk perceptions and knowledge often shape flood-related decision making; however, relatively less is known about specific individual differences in flood risk literacy. The current study presents data from 630 participants who completed a flood risk communication experiment and a general decision-making inventory (e.g., numeracy, risk perceptions, knowledge). Structural equation modeling revealed that both numeracy and flood knowledge partially explain differences in vulnerability, including effects on risk comprehension, weather risk perceptions, and decision quality (i.e., taking protective action). Limitations and implications for enhancing flood risk literacy are discussed.