adj.

shaped or conditioned or disciplined by training; often used as a combining form

"a trained mind"; "trained pigeons"; "well-trained servants"

having acquired necessary skills by e.g. undergoing a course of study

"a trained nurse"; "a trained voice"; "trained manpower"; "psychologically trained workers"

Poselets: Body part detectors trained using 3D human pose annotations
Evaluation of protein requirements for trained strength athletes
Context-Dependent Pre-Trained Deep Neural Networks for Large-Vocabulary Speech Recognition
Analysis of hidden units in a layered network trained to classify sonar targets
Clinical significance of abnormal electrocardiographic patterns in trained athletes.
Neurocontrol of nonlinear dynamical systems with Kalman filter trained recurrent networks
Survey and critique of techniques for extracting rules from trained artificial neural networks
Survey and critique of techniques for extracting rules from trained artificial neural networks
Word-sense disambiguation using statistical models of Roget's categories trained on large corpora
Cardiac Disease in Young Trained Athletes Insights Into Methods for Distinguishing Athlete’s Heart From Structural Heart Disease, W...