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We give sharp and explicit upper bounds for the first positive eigenvalue $$\lambda _1({\Box _{b}})$$ λ1(□b) of the Kohn–Laplacian on compact strictly pseudoconvex hypersurfaces in $${\mathbb {C}}^{n+1}$$ Cn+1 in terms of their defining functions. As an application, we show that in the family of real ellipsoids, $$\lambda _1({\Box _{b}})$$ λ1(□b) has a unique maximum value at the CR sphere.
The article puts forward a distributed control system based on CAN fieldbus, which achieves remotely to monitor intelligently system and diagnose fault in crusher product line MITSUBISHI Q00CPU PLC and CAN bus is used in the system MITSUBISHI GT1575-VNBA touch screen is chosen to monitor the product line. Several measured signals are transmitted to PLC via CAN and distributed I/O modules. This article...
Dielectric Electro Active Polymers (DEAP) have shown great potential as actuator materials. Their predomination in transforming mechanical to electrical energy in a generator mode are less well known. This work investigates the materials characterization and fundamentals of DEAP generators, simulation verification of the phenomenon, practical issues, and potential applications. DEAP works as a variable...
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