This issue’s articles are devoted to analysis of underwater robotics current state and prospects of its development for the purpose of studies of hydro physical processes in the ocean; approaches, criteria and algorithms for evaluating effectiveness of solving the object detection problem by using multichannel information system. Moreover, issue presents papers of the first young scientists’ «Applied Technology of Hydroacoustics and Hydrophysics» conference participants. Their papers are devoted to physical modeling of target detection capabilities by using various hydroacoustic facilities; development of the shadow devices image formation methods.
This issue’s articles are devoted to studies of hydrodynamics and dynamics of marine objects and their physical fields; solving relevant hydrophysical problems by applying traditional theoretical and experimental methods, as well as using some new information technologies; solution in linear formulation of the three-dimensional problem related to ship motions in shallow water; solution of the motion of a cone near the free surface linear problem by using potential theory methods; solution of the problem of effect of wave motion, dissipative forces of hydrodynamic resistance and internal friction in rope on the lifted load dynamics; algorithm of the underwater objects` external architecture design based on computer design technology in the absence of prototype; computational and theoretical study of the impact of elongated object on its movement capacity needs; the adjusted approximate dependency for calculating hydrodynamic loads on wire ropes while towing objects; ways of ensuring hydroacoustic compatibility on one carrier in solving various problems.
This issue’s articles are devoted to current state, trends and directions in the development of hydroacoustics and hydrophysics; the study results of regularities of internal waves in the deep ocean propagation, which showed that there exists quite large number of stratifications admitting ”non-reflective” wave propagation; study of transformation of harmonic surface-waves in deep water; possibility of using the large-eddy simulation method for solving various hydrophysical problems; description of the advanced operational forecasting system of the Gulf of Finland hydrodynamic characteristics on the basis of hydrodynamic module of the Baltic Sea eutrophication model, which is designed in St. Petersburg; need to create hydroacoustic databases and geoacoustic seabed models; algorithm for determining frequency-contrast characteristics of aqueous layers based on brightness of laser pulse scattered by water; overview of the aperture synthesis methods of hydroacoustic antennas in passive mode, results of their tests on real and test signals.
This issue’s articles are devoted to current state and development trends in dynamics of sea waves in coastal zone and their effect on shore and its facilities; mechanisms of abnormal (rogue) waves appearance near the vertical barriers and regularities of waves hitting anterior flat front on a vertical plate; the results of laboratory experiments and numerical simulations; statistical aspects of characteristics of irregular long sea waves rolling onto a constant slope shore in the framework of nonlinear theory of shallow water; models and methods for calculating short-term storm deformations on sandy shores of ponds and long-term coastal evolution depending on the sea level changes and the sediment budget imbalance; sustainability evaluation of shallow sea coastal slopes, trapezoidal or triangular channel cross sections based on the approximate solution of three-dimensional wave equations; analysis of spatial and long-term changes in the properties of wind waves of the Gulf of Finland based on visual observations and model calculations of high resolution wind fields for the Baltic Sea; mathematical modeling features of wave and hydrodynamic regimes in protected waters.