| 1. | Non - nyquist sampling method research on extent modulate wave signal
幅度调制波信号的欠采样方法研究 |
| 2. | The driving circuit was designed . 5 . on the control mode , the pwm wave produced by mcu to control the dcmotive
在控制方式上，采用单片机的定时中断，产生脉宽调制波，对直流电动机进行控制。 |
| 3. | 4 . the generation of modulation wave by wide band multiplier is designed after deep discussion on theory of the modulation wave generation
4 .在深入探讨调制波的产生原理基础上，设计了一个基于乘法器的调制波发生电路。 |
| 4. | The three - phase spwm pulses are generated through sine wave compared with triangular wave . during design , we make use of a changed structure of nco ( numerically controlled oscillator ) to
数字化设计是本系统的特点,系统最终生成的三相spwm脉冲是基于三相正弦调制波和三角载波比较得到的。 |
| 5. | The performance of the electric vehicle is improved greatly in which the harmonic wave of output voltage , power loss and torque pulsation of the system are decreased by controlling the switch angles
它运用规则采样法产生正弦脉宽调制波，通过开关角的控制抑制逆变器输出电压中的谐波分量，降低了电动机的损耗和转矩脉动，使电动车的运行性能得到了较大改善。 |
| 6. | They pointed out that modulation wave fronts ( such as those in the front of a light pulse ) in a negative index material are aligned the same way as they are in a positive index material ? anything else would violate basic causality and require parts of the wave to travel with infinite velocity
他们指出在负折射率材料中调制波前（例如光脉冲前端的波前）的方向，与在正折射率材料中相同；若非如此，就会违反基本因果律，且部份波的前进速度将成为无限大。 |
| 7. | Step power is the key for step magnetic potential , the pulse width modulate technology that selects the triangle wave as the carrier and ladder sine wave as the modulate wave is researched , furthermore the design of the actuator drive adopts dsp as the digital controller is introduced
步进电源是产生步进磁势的关键，文章研究了三角波为载波，阶梯正弦波为调制波的脉宽调制技术，进而介绍了采用dsp组成全数字控制器，完成步进电源触发的执行器驱动器的设计。 |
| 8. | To show the designing and analyzing process of the control system , the article mainly discussed two parts . one is the power circuit part , which includes designing of the output fiher and the power transformer for the system , and also the way for igbt controlling and protecting . the other is control system for the inverter , which includes the way of producing spwm wave using microprocessor , the hard ware system of the inverter and the other assistant circuits
文中重点从两个方面分析了逆变电源控制装置的工作原理和系统设计，包括逆变电源输出滤波器的设计、逆变电源变压器的设计、 igbt的控制保护等，用单片机通过软件编程生成spwm调制波的方法、控制器硬件电路组成以及其它附属电路的开发设计等。 |
| 9. | Based on the features of modulate - wave and unmodulate - wave , different methods being suitable for these two kinds signals is respectively discussed by theory and simulation . the result of simulation can be used in the practice . in this chapter , the research about the tdoa extraction method of the unmodulate - wave is also the relevant technologies needed to be study in the " life detection and orientation of earthquake emergency response system "
论文第二部分重点对连续波信号的时差提取技术进行了系统的分析研究，从连续波信号时差提取的各种方法的信号模型与原理出发，利用调制波和基波信号的特点，通过理论分析和仿真比较，分别分析了适用于这两种信号的时差提取方法及其相关技术，为工程实现提供参考。 |
