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In this paper, a new analytical method is presented to determine the stress intensity factors (SIFs) of a generally orthotropic plate with cracks emanating from a circular hole. Therefore, using the Schwartz integration method, for the first time, the analytical solution is provided based on the complex variable method. In order to use the Schwartz's theorem in solving complex integrals, a new presentation...
This paper proposes and models an efficient data aggregation method for wireless sensor networks (WSNs). In the proposed data aggregation method, every cluster head (CH) node incorporates a local forwarding history to decide whether to forward or to drop a recently received packet. When a new packet arrives at a CH node, a threshold value is calculated based on the information of the forwarding history;...
Sending and receiving redundant packets in Wireless Sensor Networks (WSN), increase the congestion ratio as well as energy consumption in WSNs. In this regard, several data aggregation methods for WSNs have been presented to identify and to aggregate redundant packets. In this paper, we present an efficient on-line data aggregation method, OLDA, for real-time WSNs. OLDA method assigns different priorities...
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