Vasile Lazarescu

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– In this paper we present a method of evolving the contrast characteristics of a satellite image by employing a real-coded genetic algorithm with subjective fitness. The contrast properties of an image are given by its contrast-stretching curve, and the task of the Genetic Algorithm is to evolve this curve in order to find the best shape according to some(More)
—With a continuous increase in the number of Earth Observation satellites, leading to the development of satellite image time series (SITS), the number of algorithms for land cover analysis and monitoring has greatly expanded. This paper offers a new perspective in dynamic classification for SITS. Four similarity measures (correlation coefficient,(More)
– This paper introduces a new method of performing mutation in a real-coded Genetic Algorithm (GA), a method driven by Principal Component Analysis (PCA). We present both theoretical and empirical results which show that our mutation operator attains higher levels of diversity in the search space, as compared to other mutation operators, meaning that by(More)
Power or energy meter systems can be incorporated with embedded controllers such as micro Web-servers with Ethernet port to transmit the reader data over the Internet. Such data can be then fed and integrated into existing energy management systems located at power companies and organizations. The problem of efficiently collecting data from a large number(More)
The current energy saving technologies rely on conventional data logging systems, where the current methods in retrieving the energy data is not convenient, and the cost of the data logging systems is high. The Automatic energy Meter Reading (AMR) technology is network-based applications used by electric/energy companies to increase performance and(More)
–This paper presents a method to increase the lifetime of Wireless Sensor Networks (WSN) with grid topologies. In order to achieve this, an adaptive routing algorithm (ARA) was developed. The paths used for routing data are chosen with respect to the residual energy of the sensor nodes. This way, a leveling of energy and a load balance of data in the(More)