Active matrix is sharper and has more contrast than less expensive passive matrix screens. Active matrix does not suffer from the "submarining" effect, in which the cursor disappears when moved ...

They are not as sharp and have less contrast than active matrix screens, and they suffer from the "submarining" effect, in which the cursor disappears when moved rapidly. Passive matrix LCD ...

The estimated covariance matrix of the parameter estimates is computed as the inverse Hessian matrix, and for unconstrained problems it should be positive definite. If the final parameter estimates ...