The phrase "a three step scheme" is correct and usable in written English.
You can use it when describing a plan or method that consists of three distinct stages or actions.
Example: "The project will be implemented through a three step scheme: planning, execution, and evaluation."
Alternatives: "a three phase plan" or "a three part strategy".
To detect all these artifacts accurately, a three step detection scheme is developed.
One concerns a kind of four step scheme approach introduced by Ma et al. [25], which can be regarded as a method combining partial differential equations and probability theory.
Synthesis of mesoporous silicas with immobilized oligosaccharide groups comprised three steps (Scheme 1).
Cyclisation, S-benzylation and deprotection using trifluoroacetic acid gave 9-cyclopropyl substituted derivative 53 in 46% yield over the three steps (Scheme 5).
The synthetic utility of the methodology was further demonstrated by the preparation of the novel proline/nicotine hybrid molecule (2 S,3 R,5 S)- 16, 14 containing three well-defined stereogenic centers, in just three steps (Scheme 4).
Reductive amination is an efficient method that is readily adaptable to parallel format and, hence, we adapted this reaction to couple compound 2, synthesized in three steps (Scheme 1) starting from 1 according to the modified reported method, with twenty-one commercially available aldehydes.
In previous work, Ma et al. (1994) studied the solvability of the adapted solution to the FBSDEs, in particular, they designed a direct scheme, called the four step scheme to solve the FBSDEs explicitly.
First, by the four step scheme, we introduce a partial differential Eq. (PDE) used to represent the solution of the FBSDE system.
Combining the four step scheme and the Euler Scheme, we defined a new numerical solution of the FBSDE system by branching particle systems in a random environment and proved related convergent results.
Then, by the result of the four step scheme, we define (Y^{n,delta,{epsilon }}(t)=u^{n,delta,{epsilon }} t,tilde {X}^{n,delta,{epsilon }}_{t})) as the numerical solution of Y t) in FBSDE (1.1).
