"theory system" is correct and usable in written English.
You can use it when referring to a system of theories, for example: "This research paper develops a unified theory system to address the issue."
Then, according to Lyapunov stability theory, system (7) is asymptotically stable.
Some results in this theory have found applications to control theory, system theory, and optimization problems.
Those who collect the most golden tickets for apps on the Queueing Theory system, will then receive discounts on additional "super queue" stickers in the future.
Some results in this theory have found their applications to control theory, system theory and optimization problems.
From this knowledge-based perspective, "ontology is defined as a theory (system) of concepts/vocabulary used as building blocks of an information processing system" (Mizoguchi et al. 1995).
As one of the naturally originated medical systems, Chinese herbal medicine (CHM) has developed for several thousand years and accumulated plenty of clinical experiences and pharmacological information to form its own integrated theory system [1].
If so, he had done a masterful end-run around all the old verities of our own western economic development theory, systems and experience.
Instead it is inherent to coherent, bias-free theory systems.
According to Lyapunov stability theory, systems (7) when (h(t)=0) are asymptotically stable.
They included elementary courses like FORTRAN and ALGOL and more advanced courses like data structures, artificial intelligence, non-arithmetic programming, automation theory, systems programming, and so on".
Typical examples are elementary particle physics, the theory of evolution, superconductivity, neural networks, chaos theory, systems biology, nanoscience, or network theory.
