The phrase "a relatively simple system" is correct and usable in written English.
You can use it when describing a system that is not overly complex compared to others, often in technical or analytical contexts.
Example: "The software operates on a relatively simple system, making it user-friendly for beginners."
Alternatives: "a fairly straightforward system" or "an uncomplicated system."
Additionally, Virgin's Trainline (www.thetrainline.com) offers a relatively simple system of planning journeys and purchasing tickets online.
A relatively simple system of differential equations was used for predicting growth of eucalypt coppice stands.
It is a relatively simple system and has proved quite effective in easing the pain of Mumbai's ever-present jams, but it certainly hasn't eradicated them.
A relatively simple system of linear equations was developed to compute the free parameters of the polynomial using the available training data.
Proton exchange membrane fuel cells (PEMFCs) with a dead-ended anode and cathode can reach high hydrogen and oxygen utilization by a relatively simple system.
In order to validate our many-body Wigner Monte Carlo method, as a case study we simulate a relatively simple system consisting of two particles in several different situations.
It is recognized that the Lyapunov function method serves as a main technique to reduce a given complicated system into a relatively simpler system and provides useful applications to control theory, but finding Lyapunov functions is still a difficult task (see, e.g., [1 3, 12, 13]).
Instead, we will focus on a relatively simpler system in which we assume equilibrium levels of scaffold complexes have formed, and that the no-signal resting state for the system involves all three enzymes bound to the scaffold, although not in an orientation which is immediately permissive of processive phosphorylation [14].
The midgut of fruit flies presents a relatively simple stem cell system for study, and has the added advantage that its cells behave in ways that are similar to the cells that make up the intestines of mammals.
We used this relatively simple system as the basis for a mathematical model of segmented musculature.
Here, we use the relatively simple system of the larval zebrafish spinal cord to study how single oligodendrocytes contribute to the dynamic regulation of myelination over time.
