Zigong Light Industry Design Institute (China)

Upon the basis of variable structure control with bilinear constant value and proportion variable structure control systems, the sliding mode of proportion differentiation variable structure control of generalized bilinear systems with multi input is studied. The ordering truncating operator /spl Omega//sub m/ is led to represent the control of n controlled variance using m control signal. The condition to generate stable sliding mode motion for this kind of system is acquired by employing Lyapunov method.

Abstract In this paper, we report the syntheses of a series of title complexes from the reaction of azine, imine or azo ligands with Pd(OAc)2 and with different bridging groups. Moreover we have investigated the mesomorphic properties of these complexes using DSC and polarizing microscopy. The results show that the mesophase temperature ranges of complexes are wider than that of corresponding organic ligands. The role of the central organic ligands, the bridging ligands between two metallic nuclei, and terminal carbon number on the mesomorphic behavior was also determined. When the bridging ligands contain an optically active group, the complexes appear to exhibit chiral smectic C phase (S* c ).