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Based on the structural features of projectile and concrete target, projectile damage mechanism and destroyed mode of target materials, utilizing the LS-DYNA which is a program that analyze dynamics to simulate the process of the target being intruded and damaged. The result is cohesive with theory and rules. At the same time, analyzing and validating the result by contrasting result and test result...
Frequency synthesizer is an important component part of a communication system, whose performance will directly affect the performance of equipment, especially on the sensitivity and selectivity of the receiver. The PLL frequency synthesizing technology, which develops fast recent years, has been the main design scheme of signal source, because of its performance advantage. Frequency synthesizer development...
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