This paper investigates the problem of energy consumption in wireless sensor networks. Wireless nodes deployed harsh environment where conditions change drastically suffer from sudden changes link quality and node status. The end-to-end delay each varies due to variation On other hand, are supplied with limited it is a great concern extend network lifetime. To cope those problems, this proposes...

Abstract In view of the disadvantages high energy consumption, short life cycle, low throughput and no application correlation in heterogeneous WSN, a two-level clustering chain routing protocol is proposed under WSN intelligent water-saving irrigation system ecological agriculture Hexi Gobi. The subnets are divides into clusters according to actual layout wireless network nodes cluster form on...

this paper explains a model for analyzing and measuring the propagation of order amplifications (i.e. bullwhip effect) for a single-product supply network topology considering exogenous uncertainty and linear and time-invariant inventory management policies for network entities. the stream of orders placed by each entity of the network is characterized assuming customer demand is ergodic. in fa...

Kenneth Arrow's impossibility theorem in social choice theory is remarkable for being at once both definitive and inscrutable. It seems to disallow a rational procedure for collective choice without suggesting practical ways to reduce the probability or magnitude of the problem. To shed light on this issue, and considering the difficulties of recreating real-world political dynamics in the lab,...

The development of a Wireless Sensor Network (WSN) gateway is challenging for sites where limited infrastructures lead to frequent power shortages and network unreliability. In this paper, we present a low-power, low-cost 802.15.4 and 802.11 compatible solution which uses open source software to meet local conditions. Using the SunSPOT motes on a system which is mostly platform independent, our...

This paper presents the important issues about the design of a low cost, micro power, indoor light energy harvesting system to supply a node of a wireless sensor network (WSN). Possible technology options, available for the photovoltaic (PV) cells, are discussed. Light power and irradiance measurements, in a real indoor environment, are performed and results are presented. From these results, a...

Wireless Sensor Networks (WSNs) consists of huge number of Sensor Nodes (SNs) with sensing, communication and processing capabilities. SNs have limited energy supply, storage and computational capacity. In recent years energy efficient computation is a major concern in WSN. The critical aspects include reduction in the energy consumption of SNs so that the network lifetime can be extended to re...

[1] A wireless sensor network (WSN) was deployed as part of a water balance instrument cluster across a forested 1 km headwater catchment in the southern Sierra Nevada of California. The network, which integrates readings from over 300 sensors, provides spatially representative measurements of snow depth, solar radiation, relative humidity, soil moisture, and matric potential. The ability of th...

Wireless Sensor Networks (WSN) represent a new dimension in the field of network research. The cluster algorithm can significantly reduce the energy consumption of wireless sensor networks and prolong the network lifetime. This paper uses neuron to describe the WSN node and constructs neural network model for WSN. The neural network model includes three aspects: WSN node neuron model, WSN node ...

This paper presents a review on energy efficient clustering protocols for heterogeneous wireless sensor network. Energy consumption is the critical design issue in the wireless sensor network since each node has a battery and each battery has limited lifetime. Therefore using the battery in efficient way became an important task for prolonging the lifetime and stability of the wireless sensor n...