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Designing an energy efficient algorithm is one of the most important challenges in wireless sensor networks (WSNs). In this paper, we present a node sleeping algorithm based on the minimum hop routing protocol to minimize energy consumption. The proposed scheme divides all the nodes except the sink node into terminal nodes and intermediate nodes according(More)
In ZigBee networks, the classical Tree Routing algorithm only utilizes the father-child relationship between nodes to establish routes, thus the path usually may not be optimal, which leads to some extra overhead. To address this problem, in this paper, we propose an improved Tree Routing algorithm which utilizes the information of neighbors within two(More)
In ZigBee wireless networks that use DAAM (Distributed Address Assignment Mechanism), the scheme may prohibit a node from accepting a child by network parameters. To address the problem, we propose BAIR (Borrowed Address Assignment based on Inheritance Relation) algorithm. Firstly the orphan is divided into the orphan router and the orphan end device, then(More)
In the existing wireless network coding mechanism, the packets used to coded are always with equal length, which is always called symmetric network coding. This coding method can effectively improve the network performance. But it also limits the further improvement of network performance in the multimedia application environment, where data packets length(More)
As a typical multi-hop clustering routing algorithm for wireless sensor networks (WSNs), RBMC (ring-based multi-hop clustering routing algorithm) needs to select cluster heads in every round and the nodes with little energy still have chance to become cluster heads. This leads to extra and uneven consumption of nodes' energy. to address the problem, we(More)
In wireless sensor networks, it has been shown that collecting data using a mobile sink can drastically reduce energy consumption at the cost of increasing delivery delay of data. In order to decrease the delay, we propose an approach of sink mobility, in which the sink moves along a ring-like route instead of a reciprocal one. Thus, a part of data packets(More)
OBJECTIVE To observe the effect of garlic oil combined with 5-FU induced apoptosis of adenoid cystic carcinoma cell line ACC-M. METHOD Human salivary in adenoid cystic carcinoma cell line AC-M was cultured, divided into the experimental group (5-FU group, garlic oil group, garlic oil + 5-FU group) and the control group, to observe the growth activity of(More)
This paper proposes a high energy-efficient clustering algorithm for WSNs (HEEC). In HEEC, an improved threshold of cluster head election based on optimal probability is presented. The threshold doesn't only consider the remaining energy of nodes, but also take the cluster heads number into account even when nodes have little energy. When the ordinary nodes(More)
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