'in the first level' is a correct and usable phrase in written English.
For example, you can use it in a sentence such as, "We have seen success in the first level of the project."
By raising money to finance tranches in the first level of securitizations, it indirectly helped to finance home buyers.
In the first level, a separate ELM-E classifier is trained for every image descriptor.
In the first level, the SOFM is used to form a two-dimensional feature map.
In the first level, a preprocessing unit to the input data is performed.
In the first level, the optimum column layout is achieved by an exhaustive search.
In the first level, the column sections are selected yielding a candidate configuration.
In the first level, simple features are extracted from the incoming sensory data.
There are three horizontal filters in the first level (level 1).
In the first level, only planning decisions are made, and the objective function is the maximization of the overall profit.
In the first level, optimized schemes are constructed for all candidate stencils by minimizing the error in the wavenumber space.
These are used to train a binary support vector machine (SVM) in the first level to identify the CRC samples.
