An NMRC (N-modular redundancy with comparison) system is presented. It surpasses all existing NMR systems in fault tolerance capability. The extra logic needed by NMRC is simpler than that of the other NMR systems. The relation between the interconnection topology and the fault tolerance capability of the NMRC system investigated. Three types of optimal NMRC systems and their characterization and structure are studied. NMRC can be viewed as a diagnosable system. The comparison approach is applied to t1/s-diagnosable systems, whereas previously it had been applied only to t0 - and t1-diagnosable systems. A laboratory 3-MRC system has been built as a node computer for a fault-tolerant multicomputer system for industrial process control. The test results confirm the high reliability and effectiveness of NMRC 相似文献
An interconnection network with multistage redundant paths is introduced for using in high-performance multiprocessor systems.The routing algorithm of the proposed network is simple and dynamically reroutable.The analysis of the fault-tolerance and performance of the network are given.It is shown that the probability of acceptance and the performance-to-cost ration of the network are better than those of F and Gamma Networks.Another advantages of the proposed network is the smaller amount of interstage links compared with F network. 相似文献
Nowadays, the scale of the user’s personal social network (personal network, a
network of the user and their friends, where the user we call “center user”) is becoming
larger and more complex. It is difficult to find a suitable way to manage them
automatically. In order to solve this problem, we propose an access control model for
social network to protect the privacy of the central users, which achieves the access
control accurately and automatically. Based on the hybrid friend circle detection
algorithm, we consider the aspects of direct judgment, indirect trust judgment and
malicious users, a set of multi-angle control method which could be adapted to the social
network environment is proposed. Finally, we propose the solution to the possible
conflict of rights in the right control, and assign the rights reasonably in the case of
guaranteeing the privacy of the users. 相似文献
As a kind of noise, mislabeled training data exist in many applications. Because of their negative effects on learning, many filter techniques have been proposed to identify and eliminate them. Ensemble learning-based filter (EnFilter) is the most widely used filter which employs ensemble classifiers. In EnFilter, first the noisy training dataset is divided into several subsets. Each noisy subset is then checked by the multiple classifiers which are trained based on other noisy subsets. It is noted that since the training data used to train multiple classifiers are noisy, the quality of these classifiers cannot be guaranteed, which might generate poor noise identification result. This problem is more serious when the noise ratio in the training dataset is high. To solve this problem, a straightforward but effective approach is proposed in this work. Instead of using noisy data to train the classifiers, nearly noise-free (NNF) data are used since they are supposed to train more reliable classifiers. To this end, a novel NNF data extraction approach is also proposed. Experimental results on a set of benchmark datasets illustrate the utility of our proposed approach.