Location sharing services are becoming increasingly popular. Although many location sharing services allow users to set up privacy policies to control who can access their location, the use made by service providers remains a source of concern. Ideally, location sharing providers and middleware should not be able to access users’ location data without their consent. In this paper, we propose a ...

Abstract The results of laser spot location have an important influence on the accuracy a measurement system. Laser diode (LD) sources been widely used in recent years because its low cost and easy integration. Based low-power LD source, conventional system was built to study factors that affect location. We analyzed influencing from two aspects driven charge coupled device (CCD) imaging, exper...

Aiming at improving the precision of nodes’ localization, this paper analyses the source of the localization error when using the least square algorithm, and proposes the principle to choose the benchmark anchor nodes in reducing the power of equation. Based on this principle, the algorithm choosing the nearest node as the benchmark anchor node in LSM and the algorithm choosing the synthetic ne...

Sink location is considered as a basic service in geographic routing in wireless sensor networks. Obtaining the location of sink node by source node using an efficient method with low complexity has always been a challenging issue in research. In this paper, a sink location algorithm based on Fano plane is proposed. The research challenge is how to ensure the intersection of two SLQ (Location Q...

The method of fundamental solutions (also known as the singularity or the source method) is a useful technique for solving linear partial di erential equations such as the Laplace or the Helmholtz equation. The procedure involves only boundary collocation or boundary tting and hence is a very fast procedure for the solution of these classes of problems. The resulting coe cient matrix, is howeve...