Under the conditions of multiple hits and quadratic effects,the aircraft vulnerability assessment method is proposed by means of kill-tree diagram and state transition matrix.Four instances of the quadratic effects ar...Under the conditions of multiple hits and quadratic effects,the aircraft vulnerability assessment method is proposed by means of kill-tree diagram and state transition matrix.Four instances of the quadratic effects are investigated:non-redundant components to non-redundant components,non-redundant to redundant,redundant to non-redundant and redundant to redundant.The application of the proposed method to the calculation of quadratic effects is also studied.展开更多
With the rapid development of Internet of Things (IoT),the issue of trust in distributed routing systems has attracted more research attention.The existing trust management frameworks,however,suffer from some possible...With the rapid development of Internet of Things (IoT),the issue of trust in distributed routing systems has attracted more research attention.The existing trust management frameworks,however,suffer from some possible attacks in hostile environments,such as false accusation,collusion,on-off,and conflicting behavior.Therefore,more comprehensive models should be proposed to predict the trust level of nodes on potential routes more precisely,and to defeat several kinds of possible attacks.This paper makes an attempt to design an attack-resistant trust management model based on beta function for distributed routing strategy in IoT.Our model can evaluate and propagate reputation in distributed routing systems.We first describe possible attacks on existing systems.Our model is then proposed to establish reliable trust relations between self-organized nodes and defeat possible attacks in distributed routing systems.We also propose a theoretical basis and skeleton of our model.Finally,some performance evaluations and security analyses are provided to show the effectiveness and robustness of our model compared with the existing systems.展开更多
This paper sets up a framework for analyzing the policies of the US and the People＇s Republic of China toward the Republic of China （Taiwan）. It surveys how the two powers＇ policies have evolved during the period ...This paper sets up a framework for analyzing the policies of the US and the People＇s Republic of China toward the Republic of China （Taiwan）. It surveys how the two powers＇ policies have evolved during the period 1949-2009 and makes numerical evaluations of the degree of ＂supportiveness＂ of American policy toward the ROC and the degree of ＂aggressiveness＂ of the PRC＇s policies. The evaluations are charted. The paper observes that the US and the PRC have been engaged in a kind of ＂ negotiation-by-move-and-countermove＂ over this period. This form of interaction is found to be slow-motion and not very effective for resolving differences between the two sides. However, the need for a formal resolution of the island＇s political-legal status becomes less important as the trade, investment, and people-to-people linkages between the two Chinese entities increase. There appears to be a huge potential for an ever-greater convergence of the two powers＇ economic desires for Taiwan even while the issue of their respective stances towards its legal-political-military status may not be resolved for quite a while.展开更多
文摘Under the conditions of multiple hits and quadratic effects,the aircraft vulnerability assessment method is proposed by means of kill-tree diagram and state transition matrix.Four instances of the quadratic effects are investigated:non-redundant components to non-redundant components,non-redundant to redundant,redundant to non-redundant and redundant to redundant.The application of the proposed method to the calculation of quadratic effects is also studied.
基金supported by the National Natural Science Foundation of China under Grant No.61100219the Fundamental Research Funds for the Central Universities under Grant No.2012JBM010the Key Program of National Natural Science Foundation of China under Grant No.60833002
文摘With the rapid development of Internet of Things (IoT),the issue of trust in distributed routing systems has attracted more research attention.The existing trust management frameworks,however,suffer from some possible attacks in hostile environments,such as false accusation,collusion,on-off,and conflicting behavior.Therefore,more comprehensive models should be proposed to predict the trust level of nodes on potential routes more precisely,and to defeat several kinds of possible attacks.This paper makes an attempt to design an attack-resistant trust management model based on beta function for distributed routing strategy in IoT.Our model can evaluate and propagate reputation in distributed routing systems.We first describe possible attacks on existing systems.Our model is then proposed to establish reliable trust relations between self-organized nodes and defeat possible attacks in distributed routing systems.We also propose a theoretical basis and skeleton of our model.Finally,some performance evaluations and security analyses are provided to show the effectiveness and robustness of our model compared with the existing systems.
文摘This paper sets up a framework for analyzing the policies of the US and the People＇s Republic of China toward the Republic of China （Taiwan）. It surveys how the two powers＇ policies have evolved during the period 1949-2009 and makes numerical evaluations of the degree of ＂supportiveness＂ of American policy toward the ROC and the degree of ＂aggressiveness＂ of the PRC＇s policies. The evaluations are charted. The paper observes that the US and the PRC have been engaged in a kind of ＂ negotiation-by-move-and-countermove＂ over this period. This form of interaction is found to be slow-motion and not very effective for resolving differences between the two sides. However, the need for a formal resolution of the island＇s political-legal status becomes less important as the trade, investment, and people-to-people linkages between the two Chinese entities increase. There appears to be a huge potential for an ever-greater convergence of the two powers＇ economic desires for Taiwan even while the issue of their respective stances towards its legal-political-military status may not be resolved for quite a while.
