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Mobile traffic data collected by network operators is a rich source of information about human habits, and its analysis provides insights relevant to many fields, including urbanism, transportation, sociology and networking. In this paper, we present an original approach to infer both spatial and temporal structures hidden in the mobile demand, via a first-time tailoring of Exploratory Factor Analysis...
In the paper the problems of modeling and investigating the behavior of complex socio-economic systems are considered. Authors are deeply concerned about decision-making support issues in the case of evaluation for such complex socio-economic systems. To solve these problems, the totality of the development goals of the object and the priorities of these goals are determined, then the indicators are...
The use of asynchronous cellular automata models to remove noise from images is considered in the article. The use of cellular automata allows to simplify calculations, eliminating floating point operations, and enable parallel processing of image points.
It is shown that virtual laboratory complexes identical to real physical stands may provide an alternative in laboratory workshop for students of technical specialties of higher educational establishments. The basic requirements for virtual complexes are formulated and graphic programming medium LabVIEW is proposed as a platform for their creation. An example of a virtual laboratory complex for the...
Mathematical models of the acoustic emission signal origin forerunners at the level of the atomic interactions, allowing to receive the equation of motion of point masses of the structure of materials which are in a far from equilibrium condition are presented in the paper.
Transition to electric heating, connection of renewable sources of energy are the main reasons, stipulating the necessity of reconstruction or modernization of the existing distribution electric grids. The research suggests the selection technique of optimal supply circuit of electric energy consumers from various sources on the base of the analysis of the given expenses and integral index of functioning...
Two new nonlinear controllers for voltage source AC-DC converter are presented. The first control algorithm is based on control of the system stored energy and guarantees a global exponential stability of the DC voltage regulation together with decoupled stabilization of the input reactive power on zero level. Second result is a simple feedback linearizing controller, which is developed using a two...
On the basis of a mathematical apparatus of the mixed Markov processes for discrete time optimum and quasioptimum adaptive algorithms of filtration of parameters of the UAV movement on data from its location calculated on the basis the time difference of arrival method are synthesized. Devices that they are realized, are multichannel and belongs to the class of devices with feedback between channels...
This paper raises the problem of regulatory limitation in port-controlled Hamiltonian energy-shaping control system (PCH ESCS). For this solution, it is proposed to use regulatory actions on directly uncontrollable loops, which can be formed during synthesis and always are discarded due to impossible implementation, by transmitting these actions through controllable loops in two different ways: first...
This paper deals with the investigation of flux and stator current maximal values of autonomous induction generator with DC link voltage and rotor angular speed below the rated values. The dependence of the maximum flux from DC link voltage is analytically determined based on the stator circuit electrical equilibrium equations in a steady state. The maximum value of the stator current active component...
This paper deals with analyzing the steady-state regulation of possibly uncertain multivariable discrete-time systems in the presence of arbitrary unmeasurable but bounded disturbances. The pseudo-inverse model-based control approach as a unified concept to cope with possible noninvertability and to achieve a desired behavior of a wide class of both linear and of nonlinear multivariable square and...
Linear structural equation models (SEMs) have been very successful in identifying the topology of complex graphs, such as those representing tactical, social and brain networks. The rising popularity of multilayer networks, presents the need for tools that are tailored to leverage the layered structure of the underlying network. To this end, a multilayer SEM is put forth, to infer causal relations...
Privacy issues are confronting rapidly increasing challenges in this big data era. There is an increasing trend that more adversaries and hackers are aiming at individual privacy with updated technology, which leads to financial loss and safety issues. We have an observation that existing models, for example, classic differential privacy, provide certain privacy protection to statistical databases...
The work is devoted to three-dimensional computer simulations of nanotube network formed in non-conductive volume and studies the electrical properties of the model network considering various types of conductivity mechanisms. Results of the simulation for nanotube networks with different geometrical parameters are presented.
The work offers a new method for analyzing and optimizing the topologie observability of cognitive maps of complex spatially distributed systems in terms of various approaches to setting the optimization problems. Such method is based on a new criterion of optimal level of its observability. The method has been elaborated on the basis of the well-known topologic observability analysis technique applicable...
This paper represents design procedure of control system for interleaved bidirectional dc-dc converter. Dynamic model of the converter was compiled with help of steady-state analysis. The theoretical results were verified by means of modeling in PSIM package.
Glyphosate is a commonly used herbicide which carries some risks of ecotoxicity and has been shown to be harmful to human beings with high levels of exposure. Existing methods of glyphosate detection often struggle to achieve the level of sensitivity required to meet regulatory requirements without the use of complicated analytical methods with multiple intermediary steps. We propose the use of microwave...
The analysis of electromagnetic processes in an electric circuit with the semiconductor converter is presented in the paper. The mathematical model for the analysis of electromagnetic processes in the semiconductor converter with power width regulation of the output voltage has been created. The problem of using the method of multiple parameter modulating function has been solved in the research work.
Since the introduction of artificial neural networks (ANN) the numerous investigations of concrete systems had been proposed. But further development of the theory and applications of networks follows to the investigations of new examples of dependent of time systems with anticipatory property. New special class of anticipatory systems had been introduced by D, Dubois — namely the system with strong...
VANETs can benefit by using an infrastructure-less model such as Floating Content (FC) in absence of infrastructures or as support to these latter. This work presents FC performances in vehicular context by using Random Waypoint mobility model.
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