Based on the computational theory of geostrophic current in ocean dynamics, the gradient computation methods of marine dynamic grid data are discussed and analysed, and the basical matters of gradient computation needing attention are expounded.

Specially,the rate of evolutional learning is increased by gradient descent algorithm,it is very useful to optimum the real-time craft process.

Based on different properties of the coefficient modulus of the signal in different scale wavelet transform,conjunction the best estimate of gra dient algorithm an edge detecting method is proposed.

Algorithm for Edge Detection Based on Fast Weighting Gradient Operator;

Finally,the whole continuous and close face contour is obtained by extracting upper face contour in the face region and by extracting chin contour through a gradient operator.

Meanwhile, the problem of solutions to second order system and a type of gradient operators equations in Hilbert space are studied by means of critical point theory.

A Combination Algorithm for Structural Optimization Based on Ge netic Algorithm and Gradient Algorithm;

Convergence of gradient algorithm for BP neural network with multiple output units;

A new gradient algorithm based on the model is presented, which is called Orth-ExtBS algorithm.