The phrase "a more complex system" is correct and usable in written English.
It can be used when discussing systems that have multiple components or interactions that make them intricate or difficult to understand.
Example: "The new software integrates with a more complex system that requires additional training for users."
Alternatives: "a more intricate system" or "a more complicated system".
Mr. Simon estimates that a full-service installation would cost about $200 for a basic system and a few hundred more for a more complex system.
A more complex system, ReAqua+, costs an extra £1,000 but will also recover 50% of the heat in the greywater.
This MEA is part of a more complex system, which has been designed to stimulate, detect and amplify electrical signals.
This system can now be used and integrated into a more complex system which could potentially be an intelligent indoor autonomous navigating helicopter.
These divisions were later reorganized into a more complex system of Manufacturing Divisions (geographic), Product Units (types of products), and Profit Centres (types of products and services).
The method presented is used in a power flow analysis of a simple rod truss system and in a more complex system as demonstrated.
As an application to a more complex system of conservation laws lacking an exact conservative linearization, we solve the ideal magnetohydrodynamics equations in two spatial dimensions.
Batch and column adsorption experiments of model adsorbate systems were successfully transferred to a more complex system of an α-lactalbumin hydrolysate containing a multitude of species.
Dan King knows these things, and informs me that it is through a process of chance, sometimes the simple tossing of a coin, but on other occasions a more complex system of drawing a card from a pack.
Clay Nessler, vice president of global energy and sustainability at Johnson Controls, helped develop a more complex system for the Citigroup tower in Long Island City, Queens, that helps keep cleaning crews on schedule.
But a more complex system would use global positioning satellite technology to present the driver with a map of the parking complex, his location, and directions for the best route to the nearest empty spot.
