Amplitude estimate of the radio signal with unknown duration and initial phase

Trifonov, A. P.; Korchagin, Yu. E.; Trifonov, M. V.; Chernoyarov, Oleg V.; Artemenko, A.A.

doi:10.12988/ams.2014.47588

Cited by 8 publications

(3 citation statements)

References 2 publications

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“…In this connection, it is sufficient to say that in the real world is not practically observed, and on the microlevel there is always a boundary layer whose thickness depends on the purity of the object of surface treatment and the conditions of reflection and refraction of light waves on the interfaces. For the simulation of object boundaries in real conditions to use a Gaussian distribution with a double convex-concave and an inflection point (point of the equality to zero of the second derivative of the color function on the coordinate) is proposed [11,12]; depending on the definition, the width of the interval between two horizontal tangents will vary in various ranges [13]. Presenting this value in the form of a flat scale, you can calculate the distance from the observer to the object.…”

Section: S L D σR R D Vrmentioning

confidence: 99%

“…One of the directions of such simplifications is the refusal to use, in addition to cameras, coupled with them detection devices (radar, various sensors). If this is an attempt to create such algorithms that would help to get all necessary information about the object only by its image or series of images [11][12][13]. To obtain the images using conventional video detectors, video cameras, which can generate a graphic image of a high-definition view of all available on a photo or video colors.…”

Section: Introductionmentioning

confidence: 99%

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Determination of object location by analyzing the image blur

Loktev¹,

Loktev²,

Federation³

2015

ces

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Problems of automation of individual modules and entire segments of integrated monitoring and surveillance systems for the transport infrastructure in areas with large concentrations of people and everywhere where it necessary to recognize certain objectives and their parameters are very relevant and timely. In this paper, the idea of determining the parameters of an object by its blurring is developed. It is assumed that a blurring is different for different colors, which decomposes a single image. It is offered as separate element of the study to consider the object boundary, which determines the sharpness. Placing objects according to the flat reference scale of blur changes, it can determine the distance from the observer to each of them.

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Section: S L D σR R D Vrmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Determination of object location by analyzing the image blur

Loktev¹,

Loktev²,

Federation³

2015

ces

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“…1). The developed computational algorithms are also suitable for determining the dynamic characteristics [12] of the behavior of the plate's points under impact load. Figure 2 shows the dependence of the maximum contact force on the dimensionless thickness of the plate with different values of the initial impact velocity.…”

Section: Numerical Investigationmentioning

confidence: 99%

The method of determining the locations of reinforcing elements in a composite orthotropic plate undergoing dynamic impact. Part 2. Calculation algorithm

Loktev

Гридасова²,

Kramchaninov

et al. 2015

ams

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In this investigation, we realize the idea to link reinforcement positions of plane constructions with points of origin of the largest kinematic and dynamic characteristics after impact on the target. It is assumed that the largest dynamic characteristics, e.g. stresses, arise in the intersection points of wave surfaces, which 3542 Alexey A. Loktev et al. have experienced multiple reflections from the boundaries of the target. The origin and propagation of wave surfaces with finite velocities in the proposed model of the deformation of a flat target become possible due to the use of hyperbolic equations of Uflyand-Mindlin-Reissner type describing dynamic displacements of the points of the plate with consideration of the transverse shear deformation and rotational inertia of cross-sections. In this paper, we propose an algorithm taking into account different rheological properties of the interacting bodies, which is based on the analytical method of representation of unknown quantities in the form of expansions in a spatial coordinate and time, initial and boundary conditions, compatibility conditions. The final integro-differential equations are solved using numerical computational schemes. Moreover, the creation of algorithms for calculating impact interactions with a given wave portrait in colliding bodies, as well as their implementation in a software application with a simple and intuitive interface are desirable. In this paper, we developed a computational algorithm and a software system and tested them on the example of a flat target composed of materials with various mechanical characteristics. Furthermore, we provide specific recommendations for locations of reinforcing filaments or rods in the composite material.

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