Pseudorandom signals are widely used as input signals for system identification, but they have the drawback that there are many different kinds, each with a sparse range of possible periods. This paper shows how objec...
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Pseudorandom signals are widely used as input signals for system identification, but they have the drawback that there are many different kinds, each with a sparse range of possible periods. This paper shows how object-oriented concepts can be used in a single Matlab program to create pseudorandom signals with specified levels and spectral or correlation properties for which very large numbers of periods are available. The signals are suitable for single-input and multi-input system identification, and the program can be used independently or in combination with Matlab Toolboxes.
Operator interface for a controlled water tank process has been developed in Java. The task of the system is to control the water level in a tank, to give the user an opportunity to interact with the controller, and t...
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Operator interface for a controlled water tank process has been developed in Java. The task of the system is to control the water level in a tank, to give the user an opportunity to interact with the controller, and to present data in a lucid way. The P-, I- and D-part of the control signal are shown in a graph and thereby give a clear insight in the function of the controller. Taking use of the Java standard libraries has made the program small but at the same time powerful.
For some time now, NGC has been developing on-line transient stability analysis tools. A particular need is the development of a facility that will help in the monitoring of intertrip schemes. This paper, therefore, d...
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For some time now, NGC has been developing on-line transient stability analysis tools. A particular need is the development of a facility that will help in the monitoring of intertrip schemes. This paper, therefore, describes the features of the General Intertrip Monitoring System (GIMS) facility developed for the NGC system and currently running on-line at the National Control Centre. The paper also demonstrates the operational experience in using this tool.
We propose a theoretical device for modeling the creation of new indiscernible semantic objects during program execution. The method fits well with the semantics of imperative, functional, and object-oriented language...
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We propose a theoretical device for modeling the creation of new indiscernible semantic objects during program execution. The method fits well with the semantics of imperative, functional, and object-oriented languages and promotes equational reasoning about higher-order state.
An expert system was developed to assist lime growers and agricultural extension agents in the cultivation of lime. The program, LIMEX, includes assessment, irrigation, fertilization, and pest control recommendations....
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An expert system was developed to assist lime growers and agricultural extension agents in the cultivation of lime. The program, LIMEX, includes assessment, irrigation, fertilization, and pest control recommendations. A methodology interactively using knowledge engineering and software engineering processes and based on KADS was used to design and develop LIMEX. LIMEX was implemented on the CLIPS shell integrated with C++. Verification and validation procedures were conducted throughout the design and development of LIMEX. The paper examines the structure and capabilities of the field prototype of LIMEX, which precedes the final product.
The method of image transformation based on fractal geometry is developed. The method is based on building an image based on the Hilbert curve. The image is based on the principle of conformity of the contrast of the ...
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The method of image transformation based on fractal geometry is developed. The method is based on building an image based on the Hilbert curve. The image is based on the principle of conformity of the contrast of the image of the filling density of the plane with lines. The mathematical substantiation of the method is given. The corresponding software is built with the use of postscript language. The work of the method is illustrated by figures. The method is used for images protection.
A component-centred approach to the derivation of the diagnostic rules for continuous processes is presented below. It strongly relies on the causal representation of fault propagation within the basic process units w...
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A component-centred approach to the derivation of the diagnostic rules for continuous processes is presented below. It strongly relies on the causal representation of fault propagation within the basic process units where the modelling convention of Hunt et al. (1993) is adopted. Basic information concerning the disturbance and fault propagation is stored in terms of the unit mini-fault tree. Additional information on special process structures is treated systematically by making use of template trees. The diagnostic rules for the entire process are obtained by chaining the mini-trees and combining the deviations caused by a fault. The paper presents some improvements concerning more efficient on-line use of the resulting rules. A major contribution concerns the realisation of the CAD environment for the prototyping of the diagnostic systems based on the process flowsheet and library of process components. Such a concept enables the re-usability of the basic process component models and the incremental development of the components library.
Nowadays, distributed computing systems are widely used due to the great advances that have been achieved in computer networks in the past few years, and partly due to their low cost. Developing software for these sys...
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Nowadays, distributed computing systems are widely used due to the great advances that have been achieved in computer networks in the past few years, and partly due to their low cost. Developing software for these systems turns out to be complicated, mainly due to the heterogeneity of the distributed system components and the underground communication layers. MMS is a suitable language to carry out the communication between devices in a heterogeneous manufacturing system because it provides uniformity in the access to them. This work proposes the use of the ORB specified in CORBA from the OMG to communicate MMS events.
This paper presents an object-oriented extension to the real-time programming language PEARL. The new language preserves PEARL’s expressiveness for timeliness and industrial processes and, at same time, improves the ...
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This paper presents an object-oriented extension to the real-time programming language PEARL. The new language preserves PEARL’s expressiveness for timeliness and industrial processes and, at same time, improves the language’s readability and manageability (through the better encapsulation paradigm derived from the object concept). The proposed language is fully backward compatible with PEARL and, moreover, with the resulting object model one is in a position to define inter and intra object parallelism in a transparent and simple way.
Logistics simulation plays critical roles to design factories and to verify production schedules. It is time-consuming, in general, to simulate large-scale logistic models in details. We have developed a discrete-even...
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Logistics simulation plays critical roles to design factories and to verify production schedules. It is time-consuming, in general, to simulate large-scale logistic models in details. We have developed a discrete-event simulator (SIMXPERT), which employed a rule-based inference engine. The engine equips algorithms for pattern matching and conflict resolution that are far higher in performance than those used in the conventional inference engines. We have developed a system using the SIMXPERT to simulate behaviors of autonomous guided vehicles (AGVs) that were constructed in a factory at Kimitsu-Works of Nippon Steel Co. This system was useful to examine the valid number of vehicles and reasonable ways to control them. Operators of the factory validate schedules of mills and vehicles based on future inventory levels of products predicted by the system. It takes one minute to simulate the precise movements of hundreds of products carried by several vehicles. This paper describes the overall system design and presents the simulation result based on real data.
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