This article had simulation by MATLAB / Simulink software, as well analyzed, simulated, compared the common modulation techniques such as the stepped-wave modulation method, the carrier vertical phase-shifting method and carrier level phase-shifting method. 利用MATLAB/simulink仿真软件对常用的调制技术如阶梯波调制法、载波是垂直移相法和载波水平移相法进行了分析仿真比较。
Study of the stiffness of tool carrier of a vertical lathe 关于立式车床刀架刚度的研究
Particulate matter is the main carrier for carbon vertical transportation in the sea, it plays important role in Earth's Carbon Cycle. 海水中的颗粒物是碳元素垂直转移的主要载体,,因此在全球碳循环中有重要作用。
By analyzing mechanism of the influence of ship motion on carrier launching, the vertical component of exit velocity is treated as a key parameter for evaluating launching safety. 通过分析航母运动对舰载机起飞的影响机理,选择飞机离舰爬升率作为评价起飞安全性的关键参数;