Polysaccharide's SAR is the relationship of. a polysaccharide's junior structure, senior structure and its physical and chemical properties with its biological activity.

The formula of actuating force produced by multiple piezoelectric patches and the control equations of multi layer beam are derived based on the constitutive relations of different materials.

Structural description is a key step in the QSAR studies. Whether the structural descriptors can reflect the structural variations determines the success of QSAR studies.