Oc..+. 95" TI1is paper describes a system which assists in the strategic placement of RF base stations within buildings. Known as the Site Modeling Tool (SMT), this system allows the user to display graphical floor plans and to select base station transceiver parameters. including location and orientation. interactively. The system then computes ancl highlights estimated coverage regions for ea...

In this paper, we propose a variant of Chord system that is resilient to routing attacks. By routing attacks, we mean the attacks which detour the looking up messages, aiming to disrupt the performance of data look-up systems by increasing the path length of queries. Chord routes messages uni-directionally and has no bi-directional edges. While its performance in the absence of routing attacks ...

Aiming at the problem that the traditional control methods can’t satisfactorily complete the trajectory tracking task, so a multi point preview control method based on automobile driving is designed for the motion control of four-wheel drive omni-directional mobile robot. Lateral position error and curvature of each preview point are calculated based on the robot’s lateral position error model....

There is a widespread belief among linguists that a predicate's subcategorization frames are largely determined by its lexical-semantic properties [23, 11, 12]. Consider the domain of movement verbs. Following Talmy [23], these can he semantically classified with reference to the meaning components: MOTION, MANNER, CAUSATION, THEME (MOVING ENTITY), PATH AND REFERENCE LOCATIONS (GOAL, SOURCE). L...

This paper explores the use of variable wing dihedral and variable wing twist (in conjunction with a conventional horizontal elevator) to control an aircraft performing a perching maneuver. A choice of controller architecture wherein the dihedral is employed in the forward path and the elevator and twist are employed in the feedback path, is considered. The aircraft is modeled as a multivariabl...

We analysed pigeon flock flights using GPS trajectory data to reveal the most important kinematic aspects of flocking behaviour. We quantitatively investigated the internal motion of the flock based on pairwise statistics and found the following general relationships in all datasets: i) the temporal order of decisions characterised by the delay between directional changes is strictly related to...

When humans interface with machines, the control interface is usually passive and its response contains little information pertinent to the state of the environment. Usually, information flows through the interface from human to machine but not so often in the reverse direction. This work proposes a control architecture in which bi-directional information transfer occurs across the control inte...

The recovery of writing trajectory from offline handwritten image is generally regarded as a difficult problem [1]. This paper introduced a method to recover the writing trajectory from multiple stroked images by searching the best matching writing paths of template strokes. The searching procedure is guided by a matching cost function which is defined as the summation of positional distortion ...

In a hostile environment, it is important for a transmitter to make its wireless transmission invisible to adversaries because an adversary can detect the transmitter if the received power at its antennas is strong enough. This paper defines a detection probability model to compute the level of a transmitter being detected by a detection system at arbitrary location around the transmitter. Our ...