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With the development of modern computer technology, the growth of purchase funds for storage equipment is far behind the growth of data. How to effectively use the limited storage resources to store data becomes the focus of our research and the data compression technology is the key to solve this problem. The traditional compression technology on the CPU platform could not meet the requirements for...
As a result of the development of higher speed and heavier load of rail networks, rail defects have been more serious than ever before. This paper introduces the least squares method (LSM) to demodulate multi-frequency signals in electromagnetic rail inspection using eddy current detection. The demodulation speed of LSM is faster than other methods because it can estimate frequencies with one time...
Multiple Sequence Alignment (MSA) is a fundamental process in bioinformatics in which phylogenetic tree reconstruction is an essential operation. Neighbor-Joining algorithm is the best approach to reconstruct phylogenetic tree with its less time and space costs. With the rapid increase of biological sequences, it will take many hours or even days to reconstruct phylogenetic tree because of the complex...
Proportional plus derivative controller suffers from non-zero steady-state error due to no integral element. Meanwhile, ignoring ripple in the design process weakens the steady-state performance for switching dc-dc converters. In this paper, a new algorithm is proposed and studied to realize zero steady-state error for proportional plus derivative controller. The proposed algorithm also eliminates...
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