In this paper, we present our investigations on the use of single objective and multiobjective genetic algorithms based optimisation algorithms to improve the design of OFDM pulses for radar. We discuss these optimization procedures in the scope of a waveform design intended for two different radar processing solutions. Lastly, we show how the encoding solution is suited to permit the optimizat...

The purpose of this work is to offer some mathematical analysis of the dynamics of a two prey one predator system in the presence of a time delay due to gestation. We derived criteria which guarantee the persistence of the three species and the global dynamics of the model system. Our study also shows that, the time delay may play a significant role on the stability of the system. Lastly, some ...

In this article, we shall discuss the general characteristics of french nasal vowels, and then introduce a pole-zero model in the frequency region selected by local optimization of the spectral matching. Lastly we combine the LP all-pole model with this local optimised zero-pole model for the recognition of a data base (325 words) of natural french nasal vowels prononced by thirteen male speakers.

We present the state of development of the practical low-loss and low-dispersion terahertz fibers. We investigate the optical characteristics of two-wire plasmonic waveguides, porous, and foam-based dielectric waveguides and highlight their advantages and disadvantages. Our research group demonstrated a hybrid metal-dielectric fiber resulting from fusion of the two aforementioned types of waveg...

Arvid Carlsson was awarded the Nobel Prize for his discovery of the neurotransmitter dopamine and its clinical relevance to a condition known as Parkinson’s disease. Paul Greengard was awarded the Nobel Prize for his contributions on the mechanism of action of dopamine and other neurotransmitters. Lastly, Eric Kandel was rewarded for his discovery of the molecular mechanisms in the formation of...

In this paper we introduce filtration pairs for isolated invariant sets of continuous maps. We prove the existence of filtration pairs and show that, up to shift equivalence, the induced map on the corresponding pointed space is an invariant of the isolated invariant set. Moreover, the maps defining the shift equivalence can be chosen canonically. Lastly, we define partially ordered Morse decom...

The (q, r)-Whitney numbers were recently defined in terms of the q-Boson operators, and several combinatorial properties which appear to be q-analogues of similar properties were studied. In this paper, we obtain elementary and complete symmetric polynomial forms for the (q, r)-Whitney numbers, and give combinatorial interpretations in the context of A-tableaux. We also obtain convolution-type ...

The introduction and spread of invasive species is increasingly driven by the expansion of human-made transportation routes. We formulate a network model of biotic invasion incorporating logistic growth and dispersal along a network, and present analyses of the model. We introduce small world networks and use them to investigate the role of network properties and long-distance dispersal on spre...

The paper takes the web information of product quality safety as research object. Aiming at its transmission characteristic at social network, information transmission model based on government intervention is presented. Meanwhile, the influence of information transmission with government intervention is analyzed. Lastly we adopted BA network to build human relation model, used MATLAB tool to s...