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作者： Bocewicz, Grzegorz Wójcik, Robert Banaszak, Zbigniew A. Dept. of Computer Science and Management Koszalin University of Technology Koszalin Poland Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland Faculty of Management Dept. of Business Informatics Warsaw University of Technology Warsaw Poland

ISBN: (纸本)9783642199332

The paper presents a new modeling framework enabling to evaluate the cyclic steady state of a given system of concurrently flowing cyclic processes (SCCP) on the base of the assumed topology of transportation routes, dispatching rules employed, resources and operation times as well as an initial processes allocation. The objective is to provide the rules useful in the course of routing and scheduling executed in SCCP where local cyclic processes interact on the base of a mutual exclusion protocol. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Transportation routes

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Synthesis of Generalised Threshold Gates and Multi Threshold Threshold Gates

Synthesis of Generalised Threshold Gates and Multi Threshold...

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IEEE International Conference on Systems Engineering

作者： Maciej Nikodem Marek A. Bawiec Janusz Biernat Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

We present formal models and efficient synthesis algorithms for threshold gates of Generalised Threshold Gate (GTG) and Multi Threshold Threshold Gate (MTTG) structures. For GTG synthesis our method does not require to calculate thresholds, that separate function onset and offsets, which greatly simplifies and speeds up the synthesis algorithm. For MTTG we propose a novel synthesis method that determines structure and circuit parameters efficiently. As complexity of MTTG circuit increases with number of thresholds we have developed a dedicated heuristic for efficiently determining the number of required thresholds. The number of resulting thresholds is smaller compared to the number of thresholds calculated using other methods.

关键词： Logic gates Boolean functions HEMTs MODFETs CMOS integrated circuits Integrated circuit modeling Mathematical model

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Competitive and self-contained gene set analysis methods applied for class prediction

Competitive and self-contained gene set analysis methods app...

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Federated Conference on Computer Science and Information Systems (FedCSIS)

作者： Henryk Maciejewski Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

This paper compares two methodologically different approaches to gene set analysis applied for selection of features for sample classification based on microarray studies. We analyze competitive and self-contained methods in terms of predictive performance of features generated from most differentially expressed gene sets (pathways) identified with these approaches. We also observe stability of features returned. We use the features to train several classifiers (e.g., SVM, random forest, nearest shrunken centroids, etc.) We generally observe smaller classification errors and better stability of features produced by the self-contained algorithm. This comparative study is based on the leukemia data set published in [3].

关键词： Prediction algorithms Stability analysis Algorithm design and analysis Support vector machines Radiation detectors Training data Logistics

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Upper Bounds on Network Lifetime for Clustered Wireless Sensor Networks

Upper Bounds on Network Lifetime for Clustered Wireless Sens...

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New Technologies, Mobility and Security (NTMS)

作者： Maciej Nikodem Bartosz Wojciechowski Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

This paper focuses on the theoretical aspects of clustering in wireless sensor networks, as a mean to improve network lifetime. We investigate whether clustering itself (with no data aggregation) can improve network lifetime in particular application when compared to non-clustered networks. We use integer linear programming to analyse 1D and 2D networks, taking into account capabilities of real-life nodes. Our results show that clustering itself cannot improve network lifetime so additional techniques and means are required to be used in synergy with clustering.

关键词： Wireless sensor networks Routing Upper bound Monitoring Proposals Energy consumption Iris

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Fast and accurate thermal simulation and modelling of workloads of many-core processors

Fast and accurate thermal simulation and modelling of worklo...

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International Workshop on Thermal Investigation of ICs and Systems (THERMINIC)

作者： B. Wojciechowski K. S. Berezowski Piotr Patronik Janusz Biernat Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

In this work we use the Fourier expansion to characterize and model many-core processor workloads for the purpose of computing accurate predictions of individual core thermal statuses. We demonstrate, that even if the workload is modeled with only a few components of its Fourier expansion, not only we obtain improved accuracy of aggregate performance measures like throughput or power consumption, but also we obtain highly accurate thermal profiles of individual cores. In this work we present the measurement and simulation results and accuracy analysis of our proposed approach. Our experiments show that assuming average activity of threads in a multi-threaded workload run on a many-core processor may lead to as much as 25% error in the estimation of the overall throughput of the system, and even larger discrepancies in the estimates of individual core's temperature traces, while applying even a few-component Fourier expansion of the benchmark traces reduce these errors by large margins.

关键词： Computational modeling Microprocessors Instruction sets Benchmark testing Approximation methods Mathematical model

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Gestures recognition by using ultrasonic range-finders

Gestures recognition by using ultrasonic range-finders

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International Conference on Methods and Models in Automation and robotics (MMAR)

作者： Bogdan Kreczmer Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

In this paper an approach to gesture recognition is presented. It is based on application of simple ultrasonic range-finders. A set of five gestures is described which can be distinguish in this way. The described met... 详细信息

关键词： Acoustics Gesture recognition Sonar Sensors Humans Mobile robots

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(n+r)D systems and their control with reduced sensitivity to parametric uncertainties

(n+r)D systems and their control with reduced sensitivity to...

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International Workshop on Multidimensional (nD) Systems

作者： Ewaryst Rafajlowicz Wojciech Rafajlowicz Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

Our aim is to propose an extension of nD systems by treating uncertain parameters of a system as additional independent variables. We recall known results on deriving equations for the sensitivity of the system state to parameter changes. Then, the problem of optimal control of linear systems extended by sensitivity equations with the quadratic criterion is stated. Its solution is relatively easy using the well known results for LQ optimal systems, but in our case the optimal controller is fed additionally by sensitivity signals. A numerical example indicates that the behavior of control system with reduced sensitivity is different than the behavior of classical systems, which is the price that we pay for parameter uncertainty.

关键词： Sensitivity Optimal control Equations Mathematical model Uncertainty Linear systems

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Expressing emotions on robotic companions with limited facial expression capabilities

Expressing emotions on robotic companions with limited facia...

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Lecture Notes in Computer Science

作者： Ribeiro, Tiago Leite, Iolanda Kedziersski, Jan Oleksy, Adam Paiva, Ana INESC-ID Instituto Superior Técnico Universidade Técnica de Lisboa Portugal Institute of Computer Engineering Control and Robotics Wrocaw University of Technology Wroclaw Poland

ISBN: (纸本)9783642239731

Facing the challenge of accurately expressing emotions with robots and characters with limited expressive capabilities, we developed an abstraction model for generating emotional expressions based on the atomic features that enable human beings to recognize emotions in other humans' faces. The model is also augmented by animation theory from movies and puppetry. A small evaluation of the expressions showed that some expressions were well recognized, in particular Anger and Sadness. © 2011 Springer-Verlag.

关键词： robotics

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Application of quaternion scale space approach for motion processing

Advances in Intelligent and Soft Computing

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Advances in Intelligent and Soft Computing 2011年 102卷 141-148页

作者： Jabloński, Bartosz Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wybrzeze Wyspianskiego 27 Wroclaw 50-370 Poland

ISBN: (纸本)9783642231537

Scale space approach turned out to be a powerful framework for image processing purposes. In this paper we introduce proposal of a scale space concept generalized for datasets of quaternions e.g trajectories representing motion capture data. We introduce equivalents of non-linear and anisotropic simplification operators which exhibit a completely new set of properties. Three groups of applications are considered: trajectory smoothing, meaningful features detection and parameterized signal synthesis. We present a theoretical analysis and the results of numerical experiments. © 2011 Springer-Verlag Berlin Heidelberg.

关键词： Computers

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How to predict future in a world of antibody-antigen chromosomes

How to predict future in a world of antibody-antigen chromos...

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Federated Conference on Computer Science and Information Systems (FedCSIS)

作者： Zbigniew Pliszka Olgierd Unold Wroclaw Public Library Wroclaw Poland Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

The paper deals with a representation of the antibody-antigen chromosomes. The proposed new binary decoding allows us to prove the dependence between subsequent generations of chromosomes, using quick and simple operations on chromosomes indices, instead of processing the binary strings. Some formal properties of the immune system were expressed based on this representation. A consistency theoretical proof for epistatic properties as well as exploration possibilities of a crossover operator was given.

关键词： Biological cells Mathematical model Immune system Encoding Aerospace electronics Equations Indexes

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