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In order to improve the dynamic pressure measurement's accuracy with pressure pipelines, the dynamic modeling of equal diameter pressure pipelines and signal reconstruction were studied. Through the theoretic analysis, dynamic calibration with SPG and parameters identification, more accurate dynamic models of the equal diameter pressure pipelines were upbuilded. With the dynamic models and FFT method,...
Stray current corrosion (SCC) is one of the most severe forms of electrochemical corrosion. In the paper, the mechanism and character of stray current from DC electric traction systems and its influence upon buried pipe were briefly introduced. The stray current testing methods and testing equipments were reviewed. A new system for monitoring the stray current, based upon virtual instrument, was put...
This paper introduces the principle of 3DES encryption algorithm and the detailed description of the algorithm design and implementation on FPGA. For the improvement of the S-box, it uses a single S-box to replace the original eight S-boxes. This will not only greatly reduces the size of circuit but also reduces the power consumption of the entire circuit. In the design, pipelining technology is used...
This paper presents a new method to implement the butterfly unit of FFT processor, based on the coordinate transformation and CORDIC algorithm. The butterfly unit uses less resource and reaches higher speed, also can be configured by parameter and satisfied by the real time operations. Finally, it can work on the frequency of 50 MHz after the design is downloaded to a chip EP2C20F484C7.
In this paper, the design for a dual core FFT processor based on CORDIC algorithm is presented. This design extracts the 2-base successions as the foundation, takes the FFT butterfly-shaped arithmetical unit as the object, uses the CORDIC algorithm superiority in the vector computation to simply the revolving factor calculation, and employs the assembly line technology to enhance the turnover rate...
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