IEEE

Using the Directional Derivative Trace Transform for Seismic Wavefield Separation

Abstract: We address the directional derivative trace transform (DDTT) for seismic wavefield separation. The goal is to separate the different seismic waves, which is a practical requirement for ...
IEEE

Integrated Directional Derivative Gradient Operator

Abstract: Accurate edge direction information is required in many image processing applications. A variety of operators for computing local edge direction have been proposed, many of them estimating a ...
Nature

Evaluation of the Directional Derivative Approach for Timely and Accurate Satellite‐Based Emission Estimation Using Chemical Transport Model Simulation of Nitrogen Oxides

The Nature Index 2025 Research Leaders — previously known as Annual Tables — reveal the leading institutions and countries/territories in the natural and health sciences, according to their output in ...
JSTOR Daily

Directional Rates of Change under Spatial Process Models

Spatial process models are now widely used for inference in many areas of application. In such contexts interest is often in the rate of change of a spatial surface at a given location in a given ...