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In this paper, a phase quantization method named appropriate recursive comparative compensation method (ARCCM) is presented. ARCCM develops on the basis of recursive comparative compensation method (RCCM) using the phased array antenna virtual bit technology (VBT). In allusion to one-dimensional uniform linear array, ARCCM is analyzed and simulated. Compared with other methods, the beam pointing accuracy...
Piezoelectric ceramic actuators have wide application prospects in precision positioning and measurement technology, but its hysteresis characteristics cause a lot of restrictions to their applications. To solve this problem, in this paper, the hysteresis characteristic of piezoelectric ceramics is analyzed, and the data of the experiment are collected, the piezoelectric ceramic hysteresis curves...
This paper takes the dichloropropane tank area in a chemical company in service for an example, and adopts the fire simulation software FDS to make numerical simulation for the whole-area pool fire accident in the dichloropropane tank. The variation of flame and the flue gas in the combustion process of pool fire is obtained from the simulation. For the flame, in the early pool fire, the flame is...
Spatial panel models of inter-provincial carbon emissions impact factors were established based on STIRPAT model in China. A spatial autocorrelation test of carbon emissions of each province in China from 1997 to 2007 had been done. Then, a spatial panel analysis of carbon emissions impact factors including total population, per capita GDP, and energy intensity was done. Conclusion: the activities...
In order to reduce the sound pressure level (SPL) of the car interior noise at idle speed, the sound packages were analyzed and optimized. When the car interior noise was reduced, the weights of the sound packages were lightest at the same time. Acoustic characteristic prediction method of multi-layered porous materials was demonstrated. Some domestic car statistical energy analysis (SEA) model was...
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