The inherent selfishness of each node for the enhancement of message successful delivery ratio and the network overall performance improvement are reflected in the contradiction relationship of competition and coopera...The inherent selfishness of each node for the enhancement of message successful delivery ratio and the network overall performance improvement are reflected in the contradiction relationship of competition and cooperation in delay/disruption tolerant networks (DTN). In particular, the existence of malicious node aggravates this contradiction. To resolve this contradiction, social relationship theory and group theory of social psychology were adopted to do an in-depth analysis. The concrete balancing approach which leveraged Nash equilibrium theory of game theory was proposed to resolve this contradiction in reality. Thus, a new congestion control routing algorithm for security defense based on social psychology and game theory (CRSG) was put forward. Through the experiment, this algorithm proves that it can enhance the message successful delivery ratio by more than 15% and reduce the congestion ratio over 15% as well. This algorithm balances the contradiction relationship between the two key performance targets and made all nodes exhibit strong cooperation relationship in DTN.展开更多
The purpose of this study was to analyze the relationship between psychosocial working conditions and perceived safety climate onboard the Swedish merchant fleet. Data was collected by a cross-sectional survey. The sa...The purpose of this study was to analyze the relationship between psychosocial working conditions and perceived safety climate onboard the Swedish merchant fleet. Data was collected by a cross-sectional survey. The sample consisted of 640 Swedish employed engine room officers. A strong relationship was found between the psychosocial working conditions and perceived safety climate onboard （RZ = .204; P 〈 .001）. While role conflict and role ambiguity showed a negative association, social support associated positively with safety climate onboard, lob demands and control showed no relation to safety climate. The conclusion is that the safety climate onboard is strongly associated with social and relational factors.展开更多
基金Projects(61202488, 61070199, 61103182) supported by the National Natural Science Foundation of China
文摘The inherent selfishness of each node for the enhancement of message successful delivery ratio and the network overall performance improvement are reflected in the contradiction relationship of competition and cooperation in delay/disruption tolerant networks (DTN). In particular, the existence of malicious node aggravates this contradiction. To resolve this contradiction, social relationship theory and group theory of social psychology were adopted to do an in-depth analysis. The concrete balancing approach which leveraged Nash equilibrium theory of game theory was proposed to resolve this contradiction in reality. Thus, a new congestion control routing algorithm for security defense based on social psychology and game theory (CRSG) was put forward. Through the experiment, this algorithm proves that it can enhance the message successful delivery ratio by more than 15% and reduce the congestion ratio over 15% as well. This algorithm balances the contradiction relationship between the two key performance targets and made all nodes exhibit strong cooperation relationship in DTN.
文摘The purpose of this study was to analyze the relationship between psychosocial working conditions and perceived safety climate onboard the Swedish merchant fleet. Data was collected by a cross-sectional survey. The sample consisted of 640 Swedish employed engine room officers. A strong relationship was found between the psychosocial working conditions and perceived safety climate onboard （RZ = .204; P 〈 .001）. While role conflict and role ambiguity showed a negative association, social support associated positively with safety climate onboard, lob demands and control showed no relation to safety climate. The conclusion is that the safety climate onboard is strongly associated with social and relational factors.
