multiple period中文什么意思

例句与用法

1. in this thesis, the main contents are following : 1 . reviewing the theory of nonlinear frequency conversion . quasi-phase-matching is discused . presenting the method for configuring periodically poled as well as multiple period superlattice
   阐述了非线性频率变换的原理，讨论了相位匹配和准相位匹配技术，着重说明了周期和准周期光学超晶格的工作原理。
2. the method can be used in the measurement of periodic and nonperiodic signal . according to the high accuracy and fixed gate-time measurement method, based on the multiple period synchronization method, the high speed, high accuracy and continuous frequency measurement is accomplished
   将其再与一种从多周期同步法发展而来的高精度、定闸门法相结合，从而实现了高速、高精度、连续频率测量，这非常适合非频率量的频率传感信号的测量。
3. analysis of ambiguity-function of lfmcw radar, including symmetrical triangular lfmcw signal and multiple periods ’ symmetrical triangular lfmcw signal . 3 . this dissertation advances new theories of lfmcw radar signal detection and estimation, including method for acceleration and velocity estimation based on polynomial phase transform; method for multi-target acceleration and velocity estimation based on modification polynomial phase transform
   包括基于多项相位变换的lfmcw雷达速度和加速度估计方法;基于修正多项相位变换的多目标lfmcw雷达速度和加速度估计方法;基于一般高斯噪声环境下的lfmcw雷达速度和加速度联合估计方法;另外提出了基于频域增采样内插方法以提高lfmcw雷达测距精度。
4. in the paper, prescale technology, interpolate method, averaging method and multiple period synchronization method are used to measure the frequency accurately . diode demodulating technology, and power attenuated method or probe coupling & water load technology are employed to measure the power of high power microwave . isothermal technology is used to improve the stability of demodulator and to expend the range of square linear region
   本文采用预分频法、内插法、多周期同步法、平均法实现了频率的精确测量;利用二极管检波技术,结合衰减法或探针耦合+水负载技术实现了大功率微波功率的测量;采用恒温技术提高了二极管检波器稳定度;完成了单片机串口通信协议设计和系统电磁兼容的分析和设计。
5. in this paper, a mixed method with the combination of advantages of analog and digital is discussed . it consists of two parts, analog and digital . first capacitance is converted to frequency by analog part, which makes the relations between capacitance and frequency, then high accuracy and instantaneous frequency measurement is accomplished by digital part based on the multiple period synchronization method
   随着数字电路的成熟,也有数字方法。本文结合模拟和数字方法两者的优点,采用模/数混合方法。该方法由模拟和数字电路两部分组成,首先由模拟电路建立电容到频率的函数对应关系;然后由数字电路对频率计数。