The paper is devoted to the problem of modeling demand for inventory management of slow-moving items in the case of reporting errors. It is proposed a generalization of the beta-binomial demand model that takes into a...
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The paper is devoted to the problem of modeling demand for inventory management of slow-moving items in the case of reporting errors. It is proposed a generalization of the beta-binomial demand model that takes into account possible reporting errors in the learning sample. For the new model, there are developed identification and forecasting algorithms that provide consistent estimators of the model parameters and mean square optimal forecasts. The efficiency of the proposed approach is illustrated by an application example for slow-moving car parts.
New developments in computer networks and communications provide new possibilities for control purposes. control systems for highly complex plants are themselves very complex and heterogeneous. A new software infrastr...
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This paper represents a new technique for remapping the distributed object-oriented software methods to target architecture. This technique takes into consideration the advantages of the structure inherit in object-or...
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The present paper considers the problem of hazard in combinatorial logic structures . We start from time constants method but we shall prove that this is not error free (there are situations when this method fails to ...
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The present paper considers the problem of hazard in combinatorial logic structures . We start from time constants method but we shall prove that this is not error free (there are situations when this method fails to point hazards in a combinatorial logic circuit). So we shall define an improvement for this method, improvement that will consider, among other features, the specific function implemented by the gates used (we are mostly interested by the inverting characteristic). In this endeavor we shall define a new type of operator and a new type of variable, both of them applicable when propagating the switching times for a specific circuit. The mentioned method is a very laborious one (considers all the possibilities disregarding the specific function implemented by a circuit). We shall prove that only a strictly limited number of situations should be considered in conjunction with the function that is being implemented by the circuit analyzed. In order to achieve this goal we shall express the logic function with respect to a new logic variable that is dependent by time. Operations with this new variable prove to have some very interesting properties (that we prove in the paper) that will allow us to restrain the window of possibilities of hazardous functioning to a very narrow one.
A technique for real time path planning of under-actuated robots is developed. The real time path-planning problem is posed as a finite time nonlinear control problem, which is solved in parallel with an optimization ...
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A technique for real time path planning of under-actuated robots is developed. The real time path-planning problem is posed as a finite time nonlinear control problem, which is solved in parallel with an optimization technique in the real time. A new controller that is called the Fault Tolerant Motion controller (FTM) is developed. Also a new measure that we called the Reliability Index (RI) is proposed to monitor, instantly, the performance of the FTM. Simulation studies are presented.
This paper is concerned with an application study of model-based fault detection method to a ship propulsion system. When modeling the object system, Quasi-ARMAX model with multi-model form is used. In this model, the...
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New developments in computer networks and communications provide new possibilities for control purposes. control systems for highly complex plants are themselves very complex and heterogeneous. A new software infrastr...
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New developments in computer networks and communications provide new possibilities for control purposes. control systems for highly complex plants are themselves very complex and heterogeneous. A new software infrastructure is needed that exploits these new emerging software technologies. An essential activity to be pursued is that of education and of including new technology in control education. The aim of this paper is to describe some of our activities and experiences in teaching of information techniques and technologies included in open control platforms of complex control systems.
This article contains information about computer network and system remote management technologies such as SNMP, DMI and WBM, including an architectural overview and mutual comparison. There is also a look in a practi...
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This article contains information about computer network and system remote management technologies such as SNMP, DMI and WBM, including an architectural overview and mutual comparison. There is also a look in a practical usage of these technologies as well as in management problems. In the main, it describes the author's provided management mechanism based on SNMP modifications. Finally, several pieces of advice are given about what has to be taken into account when implementing computer network and system remote management systems.
This paper is concerned with an application study of model-based fault detection method to a ship propulsion system. When modeling the object system, Quasi-ARMAX model with multi-model form is used. In this model, the...
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This paper is concerned with an application study of model-based fault detection method to a ship propulsion system. When modeling the object system, Quasi-ARMAX model with multi-model form is used. In this model, the system non-linearity is incorporated into model parameters by using non-linear non-parametric models (NNMs). Kullback discrimination Information (KDI) is introduced as fault detection index to evaluate the distortion in identified model, which is caused by a fault. The effectiveness of the method is verified through simulation studies on the ship propulsion system.
The paper presents a new filtering scheme for the removal of impulsive noise in color images. It is based on estimating the probability density function for color pixels in a filter window by means of the kernel densi...
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The paper presents a new filtering scheme for the removal of impulsive noise in color images. It is based on estimating the probability density function for color pixels in a filter window by means of the kernel density estimation method. A quantitative comparison of the proposed filter with the vector median filter shows its excellent ability to reduce noise while simultaneously preserving fine image details.
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