The aim of reverse engineering is to draw out many kinds of information from existing software and using this information for system renovation and program understanding. Based on traditional practice, reverse enginee...
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Humans have two distinct features with compared to any other living being;unique physical nature and emotions / feelings. Anybody who studies on humans or trying to construct human like machines should consider these ...
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This paper presents the practical experience gained in the process of implementing the human-centered automation design methodology to an electric power utility management automation function, along with the analytica...
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The method of using in-network aggregation for energy efficient data collection often results in processing delay and additional time for gathering related data at an intermediate node. This unfortunately may make the...
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ISBN:
(纸本)1595936955
The method of using in-network aggregation for energy efficient data collection often results in processing delay and additional time for gathering related data at an intermediate node. This unfortunately may make the scheme undesirable for networks deployed for emergent event monitoring. In this paper, we propose ReCoDa - Reliable forwarding of Correlated Data with low latency, an energy-efficient and reliable delivery scheme benefiting from data correlation among sensor nodes but without performing in-network aggregation. Our idea is to allow each node to determine the data transmission reliability it shall obtain based on the preceding transmissions from other nodes, subjecting to the overall information reliability requirement. This in turn is achieved through controllab.e multi-path forwarding. Simulation shows that ReCoDa can successfully reduce redundancy up to 2.9 times compared with schemes not exploiting data redundancy and achieves energy efficiency up to 4.79 times higher. Copyright 2007 ACM.
In component-based software development, it is important to use formal models to describe component composition. However, the existing component composition models generally ignore real-time issues. We present a forma...
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An approach to the design of robust tracking controllers is proposed for a class of large-scale interconnected linear uncertain systems with time-delays. The systems may contain time-delays in both states and controls...
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ISBN:
(纸本)7900719229
An approach to the design of robust tracking controllers is proposed for a class of large-scale interconnected linear uncertain systems with time-delays. The systems may contain time-delays in both states and controls. With the decentralized controller, the closed-loop system will asymptotically track the reference output. Numerical simulations have demonstrated the effectiveness of the approach proposed.
This paper presents the design of a comprehensive Multi-layer Architecture for Trajectory Replanning and intelligent execution (MATRIX) system and its evaluation through high-fidelity simulations of the R-50 helicopte...
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ISBN:
(纸本)1563479044
This paper presents the design of a comprehensive Multi-layer Architecture for Trajectory Replanning and intelligent execution (MATRIX) system and its evaluation through high-fidelity simulations of the R-50 helicopter in the Real-time Interactive Prototype Technology Integration/Development Environment (RIPTIDE). The main feature of the MATRIX system is that it assures effective real-time obstacle detection & avoidance in a cluttered environment. Specifically, this paper discusses the (i) Design of the MATRIX System;(ii) Design, implementation & testing of individual modules;(iii) Integration & implementation under RIPTIDE;and (iv) Study of the features and limitations of the proposed architecture and algorithms. The MATRIX system consists of several subsystems including: Path Planner based on Rapidly-exploring Random Trees (RRT), shortest path algorithm for pruning of redundant waypoints, a safety corridor for preventing collisions with obstacles, 4D trajectory generator, nonlinear adaptive outer-loop controller, representation of obstacles using Quadtrees, and obstacle detection using a scanning laser and Interacting Multiple Model Kalman Filters (IMM-KF). These subsystems were developed and integrated within RIPTIDE, and extensive testing was carried out using R-50 helicopter dynamics. It was found that the MATRIX system rapidly generates new paths and trajectories to avoid unknown obstacles, is highly robust, and achieves excellent overall performance.
While null space based linear discriminant analysis (NLDA) obtains a good discriminant performance, the ability easily suffers from an implicit assumption of Gaussian model with same covariance each class. Meanwhile, ...
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In this paper, an agent matching architecture for bilateral contracts of a multi agent market is proposed. The bilateral market contains a number of sellers and buyers who face opponents for negotiation and signing bi...
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In this paper, an agent matching architecture for bilateral contracts of a multi agent market is proposed. The bilateral market contains a number of sellers and buyers who face opponents for negotiation and signing bilateral contracts. Each agent has a hierarchical representation of trading commodity attributes, where based on that it will create a tree structure of attributes. Using this structure, we apply a modified version of fuzzy similarity algorithm to compute similarity between each pair of buyer and seller agents' trees. Then, we use game theory and the concept of Stackelberg equilibrium to assess the matchmaking among the seller and buyer agents. Agents who lose contract or want to sign a new contract have a chance to restart the procedure. Through a case study for bilateral contracts in energy market, the applicability of our agent matching architecture is illustrated.
This paper addresses the problem of clock offset in end-to-end network time synchronization. Firstly, an algorithm for measuring the end-to-end clock offset is proposed. Secondly, the traditional linear-compensation m...
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ISBN:
(纸本)7900719229
This paper addresses the problem of clock offset in end-to-end network time synchronization. Firstly, an algorithm for measuring the end-to-end clock offset is proposed. Secondly, the traditional linear-compensation method is analyzed and an algorithm to obtain the compensation line using least-squared algorithm is proposed. Finally, a new method of dynamic non-linear predicting compensation and its realization algorithm are proposed. Through experiments, it shows that the method of dynamic non-linear predicting compensation could compensate clock offset better than linear-compensation method. The superiority, validity and feasibility of the new method are proved.
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