An underwater wireless sensor network (UWSN) consists of numerous sensor nodes deployed below the water to monitor physical and environmental changes. But to locate the deployed sensor nodes is an issue. Global positioning system (GPS) doesn’t work below the water because of water
depth and dense medium. Also manual and stable configuration of sensor nodes is not possible in case of UWSN due to water drift of 3 m/s. This gives the challenge of locating the sensor node to fetch data from that node. So, localization plays a vital role in many applications wherein the
absence of GPS and manual configuration. Various localization schemes widespread motivation for the purpose of data tagging, node tracking and target detection. Here we are classifying various localization methods by which we can deploy various sensors under the deep sea water. Here, the authors
have also compared some existing UWSN techniques with the help of network simulator to guide the research fraternity.
In the present paper, we focus on reexamination of unified three step iteration scheme in more general infinite-dimensional manifolds i.e. in geodesic CAT(0) spaces for asymptotically non-expansive mappings. The findings hold true for both asymptotically non-expansive type mappings and asymptotically quasi nonexpansive mappings. Since, numerous iteration schemes have been introducing for so long and also claimed new and different from other which shows huge lacking of existing iteration based literature. It is to be noted that there are several iteration schemes which are claimed to be different and unique but is special case of some existing scheme. Our results improve the existing iteration scheme based literature.
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