Study on center frequency of tomato water stress based on virtual instrument
基于虚拟仪器的番茄水胁迫中心频率的研究
In this paper,developed are a method and correspondent software for calculating formation permeability from the center frequency shift and travel time delay in direct Stoneley wave.
利用多极子阵列声波测井资料提取直达斯通利波、计算斯通利波中心频率偏移和时间延迟来进行地层渗透率反演的方法已被研究了多年。
This paper derives the universal formulas for three characteristic parameters, center frequency, gain of center frequency and quality factor of bandpass filter, calculates the theoretical values of the three characteristic parameters; analyzes the effects of center frequency migration of bandpass filter on logs.
双侧向测井仪电子线路中的带通滤波器中心频率偏移直接影响地层电阻率测量值准确性，文章从理论上导出了带通滤波器的三个特性参数：中心频率、中心频率处增益、品质因素的通用表达式。
mid-frequency luminance nonlinearity
中间频率亮度非线性
The middle part of an audio frequency.
中声频，中频声波频率的中间部分
center frequency
中心频率未调制频率
They typically center on a range of 1. 5 to 4 cycles per second.
频率集中在每秒1．5周至每秒4周之间。
Power Budgets for Two-way Satellite Time Transfer Link
卫星双向时间频率传递链路中的功率预算分析
Influence of Interaction Time on Frequency Shift Quantity of Frequency Change in Photonic Crystal
光子晶体频率变换中作用时间对频率变化量的影响分析
The interval between any two frequencies having a ratio of2 to1.
倍频程频率比率为2比1的两个频率的间隔
Intermediate frequency amplifier center frequency
中频放大器的中心频率
THE RESEARCH OF PHASE NOISE AND FREQUENCY STABILITY IN TIME FREQUENCY SIGNAL
时间频率信号测量中噪声表征方法的研究
Time-to-digital converter for frequency synthesis in 0.18 μm CMOS
0.18m CMOS中用于频率综合的时间数字转换器
"bandwidth:The numerical difference between the upper and lower frequencies of a band of electromagnetic radiation, especially an assigned range of radio frequencies."
带宽:电磁辐射频带中高频与低频之间的数值差,尤指某设定的无线电频率范围。
The numerical difference between the upper and lower frequencies of a band of electromagnetic radiation, especially an assigned range of radio frequencies.
带宽电磁辐射频带中高频与低频之间的数值差，尤指某设定的无线电频率范围
The Relation and Its Application Between Time Interval Measurement and Phase Comparison in the Process of Time Comparison
时间比对中时间间隔测量与频率源比相的关系及其应用
SFTS (Standard Frequency and Time Signals)
标准频率和时间信号
optical spatial frequency filter
光学空间频率滤色器
frequency and duration method
停电频率和持续时间法
time and frequency synchronization
时间同步与频率同步
indirect digital frequency synthesizer
间接式数字频率合成器