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In terms of spectral graph theory, the graph spectrums represent more accurate structural properties and robust characteristics of the network topologies. In this study, the authors study the stability characteristics of the normalised Laplacian spectrum associated with the interactive growth mechanism for the increasing of nodes in the generation of large-scale autonomous systems (AS) graphs. With...
The coaxial corrugated horn is an important dual-band feed used in reflector antennas. The inner conductor of the coaxial feed is the high frequency feed, and the coaxial zone is the low frequency feed. The main research content is how to improve the performance of the low frequency feed. The paper studies the technique routes to realize the equal E-plane and H-plane pattern of the coaxial feed by...
Soybean meal (SBM) is commonly used for livestock feeds, but its application in diets for livestock is limited due to some antinutritional factors. The contents of methionine and lysine of soybean meal were promoted by Bacillus natto and Leuconostoc mesenteroides fermentation, benefial for the livestock feeds. It was crude protein (CP) 56.8%, methionine 43.56 mg • g −1 , and lysine 74.87 mg...
In this paper, equations are derived for solving the important geometrical parameters of the ring-focus antenna with a variable focal distance for forming an elliptic beam, a simple and efficient method for this antenna is presented, and measured and calculated patterns are given. This antenna can form a high-efficiency elliptic beam.
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