This design aims to build a sinusoidal wave generator based on double MCU 89S52 and the DDS,which can obtain the wide signal frequency output.
采用直接数字频率合成(DDS)芯片AD9850,设计了基于双单片机AT89S52的正弦信号源电路。
Preparation and Property of Dual Monomer Grafted PP;
双单体接枝聚丙烯的制备及性能研究
Coordination polymer {[La(NO3)3]2·L3}n {L= 1,4-bis{[2'-(benzylaminocarbonyl)-phenoxyl]-methyl} benzene has been synthesized by the reaction of an aryl amide type bis-monodentate ligand and La(NO3)3·6H2O, and the crystal structure of this complex has been characterized by X-ray diffraction analysis.
通过硝酸镧和双-单齿芳香酰胺型配体L {L=1,4-双[(2’-苄胺甲酰基苯氧基)-甲基]苯}之间的反应得到了配位聚合物{[La(NO3)3]2·L3)n,并用X射线单晶衍射测定了配合物的晶体结构。
Random optimal vibration-control for a double-part combination of isolated structures;
双单体组合隔震结构振动随机最优控制
In order to solve the problem of health monitoring at local area of large bridges, a double-element substructure method to identify the physical parameters of bridge structures is proposed.
为了解决大型桥梁结构局部区域的健康监测问题,提出了一种用于桥梁结构物理参数识别的双单元子结构法。