"trained according to" is a grammatically correct phrase and can be used in written English.
It is commonly used to describe the manner or method in which someone or something was trained. Example: The new employees were trained according to the company's strict guidelines and procedures.
Previous DIY experience is not required: the men are trained according to their aptitude and preference.
Aren't you glad that the pilots were trained according to reason?
This was composed of lesser noblemen, whom he trained according to Prussian rules and dressed in Prussian uniforms, like those instituted by his father.
It was in this battalion, two years later, that an antiterrorist squadron called Scorpion was trained, according to the army's Web page.
In those first months of the war, the Army was underequipped and poorly trained, according to Col. David R. Hughes, now retired, who as a lieutenant earned a Distinguished Service Cross and two Silver Stars in Korea.
That is the province of another cadre of M.P.s, known as internment and resettlement M.P.s, who are trained according to the Army's extensive doctrine on handling all manner of wartime captives and displaced persons.
The order and structure of the school is planned according to the perceived needs of the majority: lessons of a given length, teachers trained according to the government's standards to deliver a curriculum that has been planned by a committee.
In the 1960s, New York mental health officials, outraged at his attacks on the state system, blocked Dr. Szasz from teaching at a state hospital where residents trained, according to two former colleagues.
ANN and ANFIS controllers are trained according to the model.
Both networks were two-layer-perceptrons trained according to back-propagation algorithm.
A cascade classifier is trained according to the process that is described in [39].
