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Although the problem of $k$-area coverage has been intensively investigated for dense wireless sensor networks (WSNs), how to arrive at a $k$-coverage sensor deployment that optimizes certain objectives in relatively sparse WSNs still faces both theoretical and practical difficulties. Moreover, only a handful of centralized algorithms have been proposed to elevate 2-D area coverage to 3-D surface...
Made use of the vibration signals of main shaft which were measured from a normal direct-driven wind turbine and a fault one, the vibration characteristics of main shaft bearing were analyzed and studied. From time domain, frequency domain and cepstrum domain, analyzed and compared the vibration signal characteristics between normal and fault units, then narrowband envelope analysis had been made...
Although the problem of k-area coverage has been intensively investigated for dense wireless sensor networks (WSNs), how to arrive at a k-coverage sensor deployment that optimizes certain objectives in relatively sparse WSNs still faces both theoretical and practical difficulties. In this paper, we present a practical algorithm LAACAD (Load balancing k-Area Coverage through Autonomous Deployment)...
Mobile power equipment is an important measure to reduce customer outages. It enables power-uninterrupted repairs and maintenance. It can be added to the networks to quickly restore power service after fault occurrence and hence reduce power outage time. This paper presents the results of a project recently performed within the Smart Grids R&D program at the power company Vattenfall, in Sweden...
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