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Crowdsourcing coordinates a large group of workers online to do self-contained small tasks that are published by job requesters on a crowdsourcing platform. Many papers propose incentive strategies to motivate workers to participate in crowdsourcing. In this paper, we shift the focus from the workers to the job requesters by addressing two of their issues: how to design a good payment scheme to maximize...
We study an energy-efficient routing problem in static ad hoc networks. The problem, referred to as maxR, is to maximize the number of routing requests that can be satisfied in the network, under the constraint that each node has finite battery power. The online version of the problem, where the sequence of messages that has to be routed over the network is not known ahead of time, has been studied...
Wireless sensor networks (WSNs) have attracted a great deal of study due to the low cost of sensors and their wide range of applications. Most of the sensors used so far are point sensors which have disc-shaped sensing and communication areas. Energy-efficient communication is an important issue in WSNs because of the limited power resource and the inconvenience to recharge sensor batteries frequently...
Even though channel assignment has been studied for years, most IEEE 802.11-based multi-hop wireless networks such as WSN, WMN, MANET are limited by channel interference. Properly assigning orthogonal channels to wireless links can improve the throughput of multi-hop network. To solve the dynamic channel assignment problem, a routing-based channel assignment algorithm R-CA is proposed. R-CA can allocate...
To achieve the remote control and automation of ultrasonic testing equipment, a Bluetooth-based ultrasonic testing system was developed with single-chip microcomputer as the core and wireless communication technology for data transmission. The system is composed of master and slave units. The slave unit includes the ultrasonic transmitter and receiver circuits, Bluetooth communication module and the...
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