... ABSTRACT Wave directional spectrum can be used to analyze local wave conditions and extract wave statistical parameters. Existing real-time measuring instruments, such as buoys and pressure wave meters, can be used to observe two-dimentional (2D) wave spectrum, but installation and maintenance...

... spectra application frequency directional distribution proceedings directional spectrum wave buoy heave sea trial artificial intelligence spectrum wave spectrum upstream oil & gas sea state run 2 weather condition procedure transfer function directional wave spectra Full-Scale...

... of the multi-directional irregular waves was rarely studied. Most studies concerning to multi-directional irregular waves simulation are mainly focused on satisfying the consistency of the wave statistical parameters and corresponding directional spectrum, for example, the researches of Li et. al. in 1999...

... tank. wave gauge array artificial intelligence good agreement directional spectrum spectrum deviation frequency dependent correction factor machine learning spectra reconstruction error example directional spectrum output statistical output energy loss characterisation renewable...

... incident boundary spectrum random wave wave transformation component wave wave height directional spectrum coupling method energy balance equation model artificial intelligence Generation of Random Waves for Distribution of Directional Spectra on Variable Bathymetry Katsuya Hirayama Wave Group...

..., but not the desired spatial resolution and domain size. A single constraint on the probability distribution of the wave vectors, and the amplitude variances of the components allows the SS surface to conform to any prescribed spectral density. sea surface directional spectrum spectral energy density...

... directional spectra were studied using a third-generation wave model. The evolution of the spectra suggests narrowing of directionality as a precursor to a high probability of freak-wave generation. KEY WORDS: GPS wave buoy; JKEO observation; freak wave; WAVEWATCH III; directional spectrum; quasi-resonance...

... with the directorial wave meters, a wider range of users are now provided with high-accuracy directional spectra, which used to be available only by using an array of wave height meters or large-scale wave observation system. spectrum surface elevation estimation directional spectrum estimation upper layer...

... A new modification in a practical method for directional spectrum parameters by HF radar is presented. This new method is a further modification of Bayesian method reported by Hashimoto and Tokuda (1998). In this paper, a formulation of directional spectrum is characterized by an exponential...

...-dimensional spectrum ( )~ ,E f is to multiply the frequency spectrum E(f) by an empirically determined directional spreading function D. The basic premise of all parametric spreading function is that the single peak directional spectrum can be described by: ( ) ( ) ( )~ , . ,E f E f D f = (10) in which f...

... direction in the limited narrow area. However, the coastal currents may give the significant influences to stability of artificial beach and so on. vacuum generator basin renewable energy spectrum ocean energy directional random wave generator directional spectrum current action directional...

... spectra engineering international conference nagai wave direction frequency band observed directional directional spectrum port new analysis method frequency infra-gravity wave wave height spectrum hashimoto wave observation A New Analysis Method of Observed Directional and Infra...

... I L Ca.,J 0.5 1 1.5 2 frequency (Hz) Fig. 3 Comparison of target and simulated wave spectra for 2D irregular wave. Reproduction f3D Multi-directional Wave In order to generate the 3D multi-directional random sea characterized by a wave directional spectrum, the dual-face-snake-type wavemaker...

... wind wave directional directional spectrum bimodal distribution spectrum mlm directional distribution fetch-limited wind wave banner frequency ewan bimodality angular separation analysis technique nlwi bdm flume frequency range Proceedings of the Tenth (2000) International...

...-direction variance spectrum (the so-called << directional spectrum from in-situ measurements is not a straightforward task. Several measuring devices are available, including co-located gauges (e.g. directional buoys), arrays of wave probes or remote-sensing systems (e.g. synthetic aperture radar). Each...

... za t ions o f R ice ' s fo rmula . They are i l l us t ra ted by comput ing these d i s t r ibut ions fo r an example o f d i rec t iona l Gauss ian sea . KEY WORDS: directional spectrum, Gaussian sea, Rice's formula, veloc- ity of local maxima, velocity of level-crossings, level crossing contours...

... the experimental results for frequency spectrum and two dimensional directional spectrum. In the figures, the two-dimensional directional spectrum is represented. The directional distribution is given by, In the all measurement points, the frequency spectrum agrees with the target spectrum. At 1., P2 and P4...

... waves and directional waves with oblique principal wave directiolL Results from a series of wave genemtion tests demonstrate that the dual-face genemtor system is suitable to reproduce the the lalget wave conditions with good accuracy. KEY WORDS: Directional random waves, directional spectrum, dual-face...

..., it considers traight coastlines with slowly varying bathymetry, the extension to the usual three dimensional bottom not in- volving special difficulties. The bottom friction process is for- malized through a scheme which gives the relevant directional spectrum for the effective flow regime (laminar, rough...

... that short wave spectra rapidly broaden in direction with propagation through the MIZ, while long wave spectra initially narrow and then broaden to eventually also become isotropic. directional spectrum propagation thickness meylan equation floe diameter floe wave period frequency spectrum...