Description of Aphelopus mangshanensis, a new species of Dryinidae from China

Aphelopus mangshanensis n. sp., from Mount Mangshan (Hunan Province, P. R. China), is described. The new taxon is different from all other Oriental species of Aphelopus Dalman, because of the tridentate distal apex of the aedeagus

Optimal Piezoelectric Actuators and Sensors Configuration for Vibration Suppression of Aircraft Framework Using Particle Swarm Algorithm

Numbers and locations of sensors and actuators play an important role in cost and control performance for active vibration control system of piezoelectric smart structure. This may lead to a diverse control system if sensors and actuators were not configured properly. An optimal location method of piezoelectric actuators and sensors is proposed in this paper based on particle swarm algorithm (PSA). Due to the complexity of the frame structure, it can be taken as a combination of many piezoelectric intelligent beams and L-type structures. Firstly, an optimal criterion of sensors and actuators is proposed with an optimal objective function. Secondly, each order natural frequency and modal strain are calculated and substituted into the optimal objective function. Preliminary optimal allocation is done using the particle swarm algorithm, based on the similar optimization method and the combination of the vibration stress and strain distribution at the lower modal frequency. Finally, the optimal location is given. An experimental platform was established and the experimental results indirectly verified the feasibility and effectiveness of the proposed method

Description of Anteon diaoluoshanense sp. nov. from China (Hymenoptera: Dryinidae)

Anteon diaoluoshanense sp. nov. is described from a male collected on Mt. Diaoluoshan, Hainan Province, China. The new species is similar to Anteon henanense Xu, He & Olmi 2001. Keys to the Oriental species of Anteon are modified to include the new species