Intelligent acoustic rotor speed estimation for an autonomous helicopter

Acoustic sensing to gather information about a machine can be highly beneficial, but processing the data can be difficult. In this work, a variety of methodologies have been studied to extract rotor speed information from the sound signature of an autonomous helicopter, with no a-priori knowledge of its underlying acoustic properties.     

GKS—The First Graphics Standard

For the first time, an international graphics standard is possible. After years of research and redesign, the GKS emerges as the most likely candidate.     

GKS-94: an overview

A revision of the Graphical Kernel System (GKS), the first ISO standard for computer graphics programming, was completed in 1994. This summary of GKS-94 also describes an implementation of part of its new functionality. We have demonstrated that fast selection is possible with GKS-94. Thus, an application can use namesets and selection criteria as its main method of subdivision, selection and creating hierarchy within the application, and performance is acceptable given a reasonable implementation. European organizations are showing interest in implementing GKS-94, and new products are anticipated early in 1996     

Location Prediction Based on a Sector Snapshot for Location-Based Services

In location-based services (LBSs), the service is provided based on the users’ locations through location determination and mobility realization. Most of the current location prediction research is focused on generalized location models, where the geographic extent is divided into regular-shaped cells. These models are not suitable for certain LBSs where the objectives are to compute and present on-road services. Such techniques are the new Markov-based mobility prediction (NMMP) and prediction location model (PLM) that deal with inner cell structure and different levels of prediction, respectively. The NMMP and PLM techniques suffer from complex computation, accuracy rate regression, and insufficient accuracy. In this paper, a novel cell splitting algorithm is proposed. Also, a new prediction technique is introduced. The cell splitting is universal so it can be applied to all types of cells. Meanwhile, this algorithm is implemented to the Micro cell in parallel with the new prediction technique. The prediction technique, compared with two classic prediction techniques and the experimental results, show the effectiveness and robustness of the new splitting algorithm and prediction technique.     

The road to graphics standards

There has been a concerted effort over the last few years to define international standards for computer graphics. This paper outlines the history leading up to GKS being lodged with the International Standards Organization as a Draft Proposal for an international standard.