A Review of Green's Function Methods for Tracer Timescales and Pathways in Ocean Models
Abstract Understanding advective‐diffusive dispersal of trace substances in environmental fluids like the global ocean is a ubiquitous challenge in geophysics. Since the turn of the millennium, substantial progress has been made in the theory, implementation in models, and application of such tracers in oceanography.
Thomas W. N. Haine+3 more
wiley +1 more source
Dimensionality Reduction in Full‐Waveform Inversion Uncertainty Analysis
ABSTRACT The uncertainty of model parameters obtained by full‐waveform inversion can be determined from the Hessian of the least‐squares error functional. A description of uncertainty characterisation is presented that takes the null space of the Hessian into account and does not rely on the Bayesian formulation.
W. A. Mulder, B. N. Kuvshinov
wiley +1 more source
Spatial and spatiotemporal volatility models: A review
Abstract Spatial and spatiotemporal volatility models are a class of models designed to capture spatial dependence in the volatility of spatial and spatiotemporal data. Spatial dependence in the volatility may arise due to spatial spillovers among locations; that is, in the case of positive spatial dependence, if two locations are in close proximity ...
Philipp Otto+4 more
wiley +1 more source
A Video Dual-Domain Blind Watermarking Algorithm Based on Hadamard Transform
Addressing the compatibility challenges surrounding the robustness and reversibility of existing video watermarking techniques, this study introduces a novel video dual-domain blind watermarking algorithm leveraging the Hadamard transform.
Yucheng Liang+4 more
doaj +1 more source
Discrete Hartley matrix transform precoding-based OFDM system to reduce the high PAPR
The high peak-to-average power ratio (PAPR) is one of the major drawbacks of the orthogonal frequency division multiplexing (OFDM) systems that make non-linear distortion in practical implementation of high power amplifier (HPA).
Abbas Ali Sharifi
doaj
Walsh–Hadamard Transform Based Non-Orthogonal Multiple Access (NOMA) and Interference Rejection Combining in Next-Generation HetNets [PDF]
Muhammad Rehan Usman+6 more
openalex +1 more source
The Robin problems for the coupled system of reaction–diffusion equations
This article investigates the local well-posedness of Turing-type reaction–diffusion equations with Robin boundary conditions in the Sobolev space. Utilizing the Hadamard norm, we derive estimates for Fokas unified transform solutions for linear initial ...
Po-Chun Huang, Bo-Yu Pan
doaj +1 more source
Robust Watermarking in Multiresolution Walsh-Hadamard Transform [PDF]
Gaurav Bhatnagar, Balasubramanian Raman
openalex +1 more source
A Proposed SAFER Plus Security algorithm using Fast Walsh Hadamard transform for Bluetooth Technology [PDF]
R.Neelaveni D.Sharmila
openalex +1 more source
Contribution of Using Hadamard Fractional Integral Operator via Mellin Integral Transform for Solving Certain Fractional Kinetic Matrix Equations [PDF]
Mohamed Abdalla, Mohamed Akel
openalex +1 more source