15885692
Localization in Wireless Sensor Grids
This work reports experiences on using radio ranging to position sensors in a grid topology. The implementation is simple, efficient, and could be practically distributed. The paper describes an implementation and experimental result based on RSSI distance estimation. Novel techniques such as fuzzy membership functions and table lookup are used to obtain more accurate result and simplify the computation. An 86% accuracy is achieved in the experiment in spite of inaccurate RSSI distance estimates with errors up to 60%.
17608561
Safety and Hazard Analysis in Concurrent Systems
Safety is a well-known and important class of property of software programs [4] (for instance, partial correctness is a safety property), and of systems in general. The work done here is for the purpose of laying a theoretical and mathematical foundation for allowing static analyses of systems to further safety. States where safety still exists but is liable to be compromised later are further divided into di fferent kinds, with functions giving the nature of the system state. Also considered is a notion of a hazard, which can be informally characterized by saying that hazard exists in safe states that may lead to undesirable events. Details, including proofs of theorems, and further theoretical development (including applications to system composition), may be seen in [8].
5598037
Supporting Information Reuse for Video Data Indexing by Using Color Information
In this paper, an object tracking framework assisted by image segmentation and color indexing techniques to support information reuse for video data is proposed. In order to obtain more accurate results of object tracking, a color indexing method called Color Label Criteria (CLC) is adopted to relax some of the restrictions and assumptions in object tracking in our previous work with low additional cost. Our experiment results on a real video sequence show that the CLC color indexing method is very helpful to achieve more robust object tracking.
17086856
A note about shortest cycle covers
Let G be a graph with odd edge-connectivity r. It is proved in this paper that if r>3, then G has a 3-cycle (1,2)-cover of total length at most ((r+1)|E(G)|)/r.
5113927
An unsupervised segmentation framework for texture image queries
In this paper a novel unsupervised segmentation framework for texture image queries is presented. The proposed framework consists of an unsupervised segmentation method for texture images, and a multi-filter query strategy. By applying the unsupervised segmentation method on each texture image, a set of texture feature parameters for that texture image can be extracted automatically. Based upon these parameters, an effective multi-filter query strategy which allows the users to issue texture-based image queries is developed The test results of the proposed framework on 318 texture images obtained from the MIT VisTex and Brodatz database are presented to show its effectiveness.
1804026
PRISM is research in aSpect mining
Aspect oriented programming (AOP) provides programmers with a new level of modularization capability. Although improving the aspect oriented languages seems to be the most eminent task, we recognize that it is equally important for (professional) software developers to properly leverage the power of AOP and to apply AOP at large scales. As many researchers have realized, one of the best ways to assess the practicality of AOP is to retrofit AOP onto legacy software systems [6, 7, 1]. One of the important activities in doing so is aspect mining. Aspect mining aims at finding non-localized programming concerns of very large software systems, which in turn provide opportunities for aspect oriented modularization and aspect oriented refactoring. Existing work of aspect mining focuses on aspect visualization and aspect browsing [3, 2]. These tools often involve tedious human interactions for complex pattern definition over large code base. Inspired by AMT [3], AMTEX [5] is a step towards building an aspect mining environment which facilitates either autonomous or assisted aspect discovery. Prism is a major extension of AMTEX, which is designed for IDE integration, cross-language mining support, and multimodal analysis. Prism is also an extensible mining platform, which is open for supporting new mining techniques. The current implementation of Prism is built as an Eclipse plugin. It supports Java systems and partially supports C# programs. Through Prism, users can define complex lexical, semantic, and syntactical patterns. The Prism engine
45852164
An Agent-Based Hybrid Intelligent System for Financial Investment Planning
Many complex problems including financial investment planning require hybrid intelligent systems that integrate many intelligent techniques including expert systems, fuzzy logic, neural networks, and genetic algorithms. however, hybrid intelligent systems are difficult to develop due to complicated interactions and technique incompatibilities. this paper describes a hybrid intelligent system for financial investment planning that was built from agent points of view. this system currently consists of 13 different agents. the experimental results show that all agents in the system can work cooperatively to provide reasonable investment advice. the system is very flexible and robust. the success of the system indicates that agent technologies can significantly facilitate the construction of hybrid intelligent systems.