Precise manipulation of payloads is difficult with large cranes. Oscillation can be induced into the lightly damped system by motion of the overhead support point, or from environmental disturbances. A combined feedback and input shaping controller is presented here. The controller uses feedback to detect and compensate for positioning error in the overhead support unit (e.g. the bridge or trol...

This study investigates whether personal taxes are related to asset valuations. The effective tax rate of investment income fluctuated considerably since federal income taxes were introduced. The main result of the paper demonstrates that there is an economically and statistically significant relationship between asset valuations and personal tax rates. Stock valuations tend to be higher when t...

The time that containerships or transportation trucks spend in marine container terminals for loading and unloading their cargo is a real cost scenario which affects, not only the smooth operation of ports, but also affect the overall cost of container trade. The operators of shipping lines and container terminals are required to realize the importance of this issue and the costs associated wit...

Due to its high capital investment, operating and maintenance cost, a port should be managed as efficiently as possible. Learning from the best practices ports operating under similar conditions is a very useful strategy for maintaining competiveness. Under such a competitive environment, port performance measurement is not only a powerful management tool for port operations, but also constitut...

Abstract Combined with the operation specification of building tower cranes, three-dimensional path planning technology cranes and optimization points are studied. The improved RRT-Connect algorithm is proposed. By introducing heuristic information in search, search efficiency quality improved. eliminating invalid path, control burden crane reduced, optimized lifting point movement transformed ...