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International Conference and Workshop on engineering of computer-Based Systems

作者： Andrzej Wytyczak-Partyka Jan Nikodem Ryszard Klempous Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Poland

The following paper presents the effects of work on evaluating application of structure-from-motion 3D reconstruction algorithms to the purpose of computer-guided surgical training. In the paper a system for laparoscopic surgery training is presented. The key part of the system is a novel approach to training, where a 3D model of the operating fields serves as a base of the interaction between the trainee and the system. Outline of the 3D processing pipeline is presented, results are shown and discussed.

关键词： Application software Instruments Cameras Layout Minimally invasive surgery Injuries Hazards Sensor fusion Conferences computer applications

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The discrete part of the discrete-continuous scheduling problems - New properties

The discrete part of the discrete-continuous scheduling prob...

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作者： Gorczyca, Mateusz Janiak, Adam Janiak, W.A. Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Z. Janiszewskiego 11/17 50-372 Wroclaw Poland Institute of Industrial Engineering and Management Wroclaw University of Technology Smoluchowskiego 25 50-372 Wroclaw Poland

ISBN: (纸本)9783902661555

The problems of scheduling of tasks described with dynamic models appear in the real-world situations, where management of the processes described with differential equations is needed. Possible applications contains e.g: refuelling of the fleet of the boats in the given critical time, scheduling of tasks in the multiple computer systems and the forging process in the steel plants. The solution for such problems consists of two parts: continuous one (the allocation of the continuously divisible resource) and the discrete one (sequence of task subsets). The research has been done mostly for the former part so far, where the latter one was neglected. In the paper we recollect properties of the discrete part of the solution space and we prove some new properties. These new properties can be used to construct more efficient algorithms for the scheduling problems with the dynamic models of tasks.

关键词： Convex optimization

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Preemptive single processor scheduling with distinct due windows and minimization of maximum earliness and tardiness

Preemptive single processor scheduling with distinct due win...

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作者： Janiak, A. Janiak, W.A. Januszkiewicz, R. Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Janiszewskiego 11/17 50-372 Wroclaw Poland Faculty of Computer Science and Management Wroclaw University of Technology Lukasiewicza 5 50-371 Wroclaw Poland

ISBN: (纸本)9783902661555

Problem of scheduling n preemptive jobs on a single processor is studied, in which for each job a distinct due window is given in advance. If a job is completed within its due window, then it incurs no penalty. Otherwise, it incurs a job-independent earliness or tardiness cost. The objective is to find a job schedule such that a maximum of weighted costs associated with earliness and tardiness is minimized. Properties of optimal solutions of this problem are established and an algorithm based on them is presented. It is proved that the analysed problem is solvable in O(n2) time.

关键词： Scheduling algorithms

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Calculation of the Pareto Set for Some Civil engineering Design Problem

Calculation of the Pareto Set for Some Civil Engineering Des...

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International Symposium on Logistics and Industrial Informatics, LINDI

作者： Jerzy W. Greblicki Jerzy F. Kotowski Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

The aim of this paper is to show, using chosen example, the possibility to analyze a set of feasible solutions for a certain dual-criteria, complex decision making problem. The analyzed problem concerns, in particular, the designing of a detached one-family cottage. The criteria include the total cost of building the house and its durability. The area of decision variables contains 22 elements, for which each element can have one of five values corresponding to the available building technology. The effect of the analysis carried out is the determination of the set of optimal solutions in the Pareto sense for the designing task. This set contains only five elements.

关键词： Civil engineering Pareto analysis Costs Buildings Object oriented modeling control engineering computing Design engineering Robot control Decision making Investments

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Analysis of Critical Situations in Discrete Transport Systems

Analysis of Critical Situations in Discrete Transport System...

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International Conference on Dependability of computer Systems (DepCos-RELCOMEX)

作者： Tomasz Walkowiak Jacek Mazurkiewicz Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

A paper presents an approach to critical situations analysis related to discrete transport systems (DTS). The critical situation is understood as sudden shortage of some system recourses resulting in the transport system performance degradation. The analysis is realized based on availability calculation of DTS. The system is described by the formal model, which includes reliability and functional parameters of DTS. The availability and average availability of the system - defined in a functional way by delayed tasks realization, is discussed as a function of different essential parameters when the DTS is organized. The proposed analysis is based on the modeling and simulating of the system behavior using Monte Carlo approach. The paper presents some exemplar systems, based on real Polish Post DTS, modeling and results.

关键词： Postal services Availability System performance Analytical models Performance analysis Containers Degradation Time measurement control engineering computing Robot control

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Fuzzy immune approach to biomedical data processing

Fuzzy immune approach to biomedical data processing

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IEEE International Conference on Systems, Man and Cybernetics

作者： Olgierd Unold The Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

Classification is an important data mining task in biomedicine. For easy comprehensibility, rules are preferrable to another functions in the analysis of biomedical data. The aim of this work is to use a new fuzzy immune rule-based classification system for biomedical data. The performance of the proposed approach, in terms of classification accuracy and area under the ROC curve, was compared with traditional classifier schemes: C4.5, Naive Bayes, K*, and Meta END.

关键词： Immune system Bioinformatics Fuzzy systems Fuzzy sets Data mining Fuzzy logic Genetic algorithms Cybernetics USA Councils Fuzzy control

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Information Systems Performance Analysis Using Task-Level Simulator

Information Systems Performance Analysis Using Task-Level Si...

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International Conference on Dependability of computer Systems (DepCos-RELCOMEX)

作者： Tomasz Walkowiak Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wroclaw Poland

The paper presents the approach to modeling and simulation of information systems. The systems are being analyzed from the point of services realized by them. Therefore, the system is modeled as a network of interacting tasks and technical infrastructure required for the service realization. Paper, presents the formal model of a system, accompanied with model of a task realization. Moreover, a description of developed simulator, a case study with exemplar results and simulator performance analysis is given.

关键词： Information systems Performance analysis Analytical models Computational modeling computer simulation Information analysis Discrete event simulation computer networks Logic control engineering computing

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Design of Totally Self-Checking Sequential Circuits

Design of Totally Self-Checking Sequential Circuits

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International Symposium on Logistics and Industrial Informatics, LINDI

作者： Jerzy W. Greblicki Jerzy Kotowski Institute of Computer Engineering Control and Robotics Wrocław University of Technology Wroclaw Poland

Methods of designing of totally self checking sequential machines are presented in this paper. The main problem in TSC sequential machines (TSC SM) designing is synthesis TSC functional excitation circuit. Formal condition of self testing (ST) property for AND-OR structures are given. New method of circuit minimization is presented and ST of minimized circuits is proofed. We also present a methodology of designing of TSC SM. Owing to our methods we can design TSC circuits in a fully automatic way.

关键词： Sequential circuits Samarium Circuit faults Design methodology Built-in self-test Circuit synthesis Automatic testing Aerospace safety Electrical fault detection Fault detection

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Minimizing cycle time in the manufacturing system based on the flow of various jobs

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IFAC Proceedings Volumes 2009年第4期42卷 1137-1142页

作者： Czeslaw Smutnicki Institute of Computer Engineering Control and Robotics Wroclaw University of Technology Wybrzeze Wyspianskiego 27 50-370 Wrocław Poland

The paper deals with cyclic production system providing a mixture of various products, each of which is manufactured by unique sequence of operations on machines called job. The aim is to find the cyclic schedule of minimal cycle length under “no store” policy. The problem belongs to scheduling area, is called the job shop scheduling problem with no-store constraints, is strongly NP-hard, and has been considered very rarely in the literature. In this paper there are shown: mathematical model of the problem, some of its theoretical properties, two-level solution method with special algorithm based on paths in a graph on the lower level and TSAB-relative procedure on the upper level.

关键词： Scheduling algorithms optimization problems manufacturing systems cycle length

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Efficiency of double nonholonomic mobile manipulators

Efficiency of double nonholonomic mobile manipulators

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作者： Ilnicki, R. Zadarnowska, K. Institute of Machines Design and Operation Wrocaw University of Technology ul. Lukasiewicza 7/9 50-371 Wrocaw Poland Institute of Computer Engineering Control and Robotics Wroclaw University of Technology ul. Janiszewskiego 11/17 50-372 Wroclaw Poland

ISBN: (纸本)9783902661555

This paper deals with the problem of defining performance measures of doubly nonholonomic mobile manipulators composed of a nonholonomic mobile platform and a nonholonomic manipulator mounted on the platform. We introduce the kinematic theory of such mobile manipulators in frame of the endogenous configuration space approach, which assumes that: the kinematics of mobile manipulators is represented by a pair of driftless control systems driven by platform and manipulator controls, and sharing output function that describes position and orientation of the end-effector;the kinematic performance measures refer to the analytic Jacobian of the system;a locally controllable system yields nontrivial performance measures. Our results consist in a definition of the following local performance characteristics: the dexterity ellipsoid, the local dexterity, the energy efficiency and the motion efficiency. The usefulness of new local measures is demonstrated on the example of determining efficient configurations of a 3 d.o.f. planar nonholonomic manipulator fixed to a kinematic car type platform.

关键词： Energy efficiency

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