The shrinking silicon feature size causes the continuous increment of the aging effect due to the negative bias temperature instability （NBTI）, which becomes a potential stopper for IC development. As the basis of c...The shrinking silicon feature size causes the continuous increment of the aging effect due to the negative bias temperature instability （NBTI）, which becomes a potential stopper for IC development. As the basis of circuit-level aging protection, an efficient aging critical-gate identification method is crucially required to select a set of gates for protection to guarantee the normal lifetime of the circuits. The existing critical-gate identification methods always depend on a critical path set which contains so many paths that its generation procedure requires undesirable CPU runtime; furthermore, these methods can achieve a better solution with taking account of the topological connection. This paper proposes a time-efficient critical gates identification method with topological connection analysis, which chooses a small set of critical gates. Experiments over many circuits of ITC99 and ISCAS benchmark demonstrate that, to guarantee the normal lifetime （e.g., 10 years） of each circuit, our method achieves a 3.97x speedup and saves as much as 27.21% area overhead compared with the existing methods.展开更多
Failure of one or multiple critical nodes may partition wireless sensor networks into disjoint segments, and thus brings negative effect on the applications. We propose DCRS, a Distributed Connectivity Restoration Str...Failure of one or multiple critical nodes may partition wireless sensor networks into disjoint segments, and thus brings negative effect on the applications. We propose DCRS, a Distributed Connectivity Restoration Strategy to tolerate the failure of one critical node. Because of the energy restriction of sensor nodes, the energy overhead of the recovery process should be minimized to extend the lifetime of the network. To achieve it, we first design a novel algorithm to identify 2-critical nodes only relying on the positional information of 1-hop neighbors and some 2-hop neighbors, and then we present the criteria to select an appropriate backup for each critical node. Finally, we improve the cascaded node movement algorithm by determining whether a node can move to another non-adjacent node directly or not to reduce the number of nodes moved. The effectiveness of DCRS is validated through extensive simulation experiments.展开更多
One of the fundamental properties of an ad hoc network is its connectivity. Maintaining connectivity in wireless networks is extremely difficult due to dynamic changing topology of MANETs. There are several techniques...One of the fundamental properties of an ad hoc network is its connectivity. Maintaining connectivity in wireless networks is extremely difficult due to dynamic changing topology of MANETs. There are several techniques to understand the connectivity level for a given network topology. In this paper, we examine the existing methods and discuss the issues and challenges that are still insurmountable in order to enhance the connectivity properties of wireless multi hop networks.展开更多
随着网联化逐渐成为当今汽车技术发展的主流趋势之一,车载端信息安全问题也随之日益紧迫。作为加固信息安全风险点、制定安全技术要求的必要条件之一,研究科学合理的车载端信息安全评价方法,对于提升车载端信息安全水平具有重要意义。...随着网联化逐渐成为当今汽车技术发展的主流趋势之一,车载端信息安全问题也随之日益紧迫。作为加固信息安全风险点、制定安全技术要求的必要条件之一,研究科学合理的车载端信息安全评价方法,对于提升车载端信息安全水平具有重要意义。文章基于熵值法、基于指标相关性的指标权重确定方法(Criteria Importance Through Intercriteria Correlation,CRITIC)和前期工作成果,介绍了一种新型的综合主、客观权重信息的定量评价方法,并基于对车载端信息安全风险点的梳理,给出了智能网联汽车信息安全评价权重具体计算过程。通过对熵值法和CRITIC法的组合运用,全面考虑了原始评价数据的离散型、冲突性以及变异性,使所得综合权重更加合理。展开更多
A graph G is called k-critically n-connected or simply (n, k)-graph, (n≥k≥1), if for all V′(?)V(G) with |V′|≤k, we have k(G-V′)=n-|V′|, where k(G) denotes the connectivity of G. This notion is introduced by Mau...A graph G is called k-critically n-connected or simply (n, k)-graph, (n≥k≥1), if for all V′(?)V(G) with |V′|≤k, we have k(G-V′)=n-|V′|, where k(G) denotes the connectivity of G. This notion is introduced by Maurer and Slater in (1)The following conjecture on a (n, k)-graph is proposed.展开更多
The spinal cord,a vital bridge connecting the brain and peripheral nerves,plays a pivotal role in governing motor functions and coordinating basic life activities of the body,mainly through a rare and critical group o...The spinal cord,a vital bridge connecting the brain and peripheral nerves,plays a pivotal role in governing motor functions and coordinating basic life activities of the body,mainly through a rare and critical group of cells within the spinal cord called motor neurons.As the“command center”for human movement and basic organ autonomous activities.展开更多
基金supported by the National Natural Science Foundation of China under Grant No.61274036,No.61371025,No.61204027,and No.61474036
文摘The shrinking silicon feature size causes the continuous increment of the aging effect due to the negative bias temperature instability （NBTI）, which becomes a potential stopper for IC development. As the basis of circuit-level aging protection, an efficient aging critical-gate identification method is crucially required to select a set of gates for protection to guarantee the normal lifetime of the circuits. The existing critical-gate identification methods always depend on a critical path set which contains so many paths that its generation procedure requires undesirable CPU runtime; furthermore, these methods can achieve a better solution with taking account of the topological connection. This paper proposes a time-efficient critical gates identification method with topological connection analysis, which chooses a small set of critical gates. Experiments over many circuits of ITC99 and ISCAS benchmark demonstrate that, to guarantee the normal lifetime （e.g., 10 years） of each circuit, our method achieves a 3.97x speedup and saves as much as 27.21% area overhead compared with the existing methods.
文摘Failure of one or multiple critical nodes may partition wireless sensor networks into disjoint segments, and thus brings negative effect on the applications. We propose DCRS, a Distributed Connectivity Restoration Strategy to tolerate the failure of one critical node. Because of the energy restriction of sensor nodes, the energy overhead of the recovery process should be minimized to extend the lifetime of the network. To achieve it, we first design a novel algorithm to identify 2-critical nodes only relying on the positional information of 1-hop neighbors and some 2-hop neighbors, and then we present the criteria to select an appropriate backup for each critical node. Finally, we improve the cascaded node movement algorithm by determining whether a node can move to another non-adjacent node directly or not to reduce the number of nodes moved. The effectiveness of DCRS is validated through extensive simulation experiments.
文摘One of the fundamental properties of an ad hoc network is its connectivity. Maintaining connectivity in wireless networks is extremely difficult due to dynamic changing topology of MANETs. There are several techniques to understand the connectivity level for a given network topology. In this paper, we examine the existing methods and discuss the issues and challenges that are still insurmountable in order to enhance the connectivity properties of wireless multi hop networks.
文摘随着网联化逐渐成为当今汽车技术发展的主流趋势之一,车载端信息安全问题也随之日益紧迫。作为加固信息安全风险点、制定安全技术要求的必要条件之一,研究科学合理的车载端信息安全评价方法,对于提升车载端信息安全水平具有重要意义。文章基于熵值法、基于指标相关性的指标权重确定方法(Criteria Importance Through Intercriteria Correlation,CRITIC)和前期工作成果,介绍了一种新型的综合主、客观权重信息的定量评价方法,并基于对车载端信息安全风险点的梳理,给出了智能网联汽车信息安全评价权重具体计算过程。通过对熵值法和CRITIC法的组合运用,全面考虑了原始评价数据的离散型、冲突性以及变异性,使所得综合权重更加合理。
文摘A graph G is called k-critically n-connected or simply (n, k)-graph, (n≥k≥1), if for all V′(?)V(G) with |V′|≤k, we have k(G-V′)=n-|V′|, where k(G) denotes the connectivity of G. This notion is introduced by Maurer and Slater in (1)The following conjecture on a (n, k)-graph is proposed.
文摘The spinal cord,a vital bridge connecting the brain and peripheral nerves,plays a pivotal role in governing motor functions and coordinating basic life activities of the body,mainly through a rare and critical group of cells within the spinal cord called motor neurons.As the“command center”for human movement and basic organ autonomous activities.
