The phrase "involves four aspects" is correct and usable in written English.
You can use this phrase when you need to explain that a certain process or situation has four components. For example, "Teaching a complex topic involves four aspects: knowledge of the subject matter, effective communication with the students, use of suitable teaching materials, and ability to engage the students in learning."
Systematic observation of behaviour involves four aspects: people, activities, setting or space and timing.
According to heart failure guidelines, self-management involves four aspects: medication management, symptom management, dietary modifications, and activity adjustments [ 12, 13].
Training in Karate generally involves four aspects: Kihon (Basic techniques).
A field survey usually involves three aspects: survey items, survey procedures and survey methods.
An extension to high phase fractions is made here and this involves two aspects.
Communication technology of the wide area protection involves two aspects: the communication in the substation area and the wide area communication.
For extracting SAR target segmentation based on partial differential equation, it mainly involves two aspects: establishing a reasonable energy functional to describe SAR image characteristics and finding effective optimization methods of the energy functional.
The innovation of our proposed algorithm involves two aspects: firstly, a novel dynamic state-space model (DSM) is designed to describe aptly the actual spectrum sensing process over TVMFF channel based on matched filtering (MF).
In this paper, this problem is addressed with a variational SAR image segmentation approach which mainly involves two aspects: establishing a reasonable energy functional to describe SAR image characteristics and finding effective optimization methods of the energy functional [12].
The "junction point" involves three aspects, namely: Cutting tool insert indexing, insert changing for single point cutting tool like boring bar; cutting tool dressing for a multi point cutting tool like grinding wheel; cutting tool holder location and clamping aspects; calibration of cutting tool setting in the tool-pre-setting area.
Bacterial chemotaxis pathway design mainly involves two aspects: one is the sensing of attractants or repellents by macromolecules and relaying these signals to the motor; the other is the quantitative relations between the input ligand concentration and output signal controlling motor rotation state.
