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Due to the diffusion of Internet of Things (IoT), many devices such as water meters, smart dumpsters, and many other objects have the capacity to record data. Gathering these data from the devices is a problem that could be solved in three ways: by building a huge network infrastructure, by using regular workforce or by using opportunistic IoT networks, i.e. by using as mobile hotspots the devices...
This paper highlights the concepts related to the fuzzy Sumudu transform (FST). Few important theorems are illustrated for uncovering the properties of FST. By utilizing the generalized FST, the fuzzy differential equations (FDEs) are resolved. The suggested technique is validated by laying down two real examples.
The emergency medical system is an important element of the city's infrastructure. A method for solving the problem of ambulances distribution, using simulation tools in combination with the multi-periodicity of the system is considered.
In this study, we derive the Bayesian estimators of polytomous item response theory (IRT) models with an approximated conditional likelihood function and consider their mathematical optimalities. First, we derive Bayesian estimators of the rating scale model (RSM) and related IRT models with a conditional type approximated likelihood function proposed by [10]. Then, we evaluate the admissibility and...
Using Walsh functions the solution of a linear periodic delay differential equation is approximated. The monodromy operator is then constructed based in the solution obtained. Dominant eigenvalues of the monodromy operator are calculated to determine the stability charts of the delayed Mathieu equation.
The paper presents a cooperative scheme for controlling arbitrary formations of low speed experimental UAVs based on a distributed LQR design methodology. Each UAV acts as an independent agent in the formation and its dynamics are described by a 6-DOF (degrees of freedom) nonlinear model. This is linearized for control design purposes around an operating point corresponding to straight flight conditions...
In this paper, we propose a level-set method to identify urban areas using a nighttime light data of Suomi National Polar-orbiting Partnership (NPP) Visible Infrared Imaging Radiometer Suite (VIIRS). Our method is compared to two standard methods, called the Otsu's threshold-based method and the k-mean clustering method. The experimental results indicates significant improvement in terms of the Kappa...
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