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- Moreover, it is very important to introduce the equal frequency surface (EFS) method because the trajectory of the refraction can be predicted basically by this useful method. 法,因为此方法基本上可以预测电磁波经过介质后折射的行进轨迹。
- Keywords photonic crystal;self-collimation;equal frequency surface;subwavelength lensing; 光子晶体;自准直;等频面;亚波长成像;
- Equal frequency surface 等频率面
- Any one of the numbers or values in a series dividing the distribution of the individuals in the series into ten groups of equal frequency. 十分位数指把一系列的数字或价格按相等的出现频率分成十组后的其中任何一个数字或价格
- Wave speed equals frequency times wavelength. 波速等于频率乘以波长。
- A set of ac power-supply circuits (usually three) carrying currents of equal frequency with uniformly-spaced phase differences. 一组频率相同,相位彼此相差均匀的交流供电电路(一般是三相)。
- A set of ac power-supply circuits(usually three) carrying currents of equal frequency with uniformly-spaced phase differences. 一组频率相同,相位彼此相差均匀的交流供电电路(一般是三相)。
- Method The concept of instantaneous median frequency surface EMG signal was discussed. 目的采用时频分析法分析表面肌电信号瞬时中值频率。
- A set of acpower - supply circuits(usually three)carrying currents of equal frequency with uniformly - spaced phase differences. 一组频率相同,相位彼此相差均匀的交流供电电路(一般是三相)。
- The frequency spectrum energy of time - frequency surface of Short - time Fourier Transform, especially peak value has distinct difference to different swept extent. 油层水淹程度不同,短时博里叶变换时频面上频谱能量,尤其峰值能量大小存在显著差异。
- Volvulus is most common in adults, where it occurs with equal frequency in small intestine (around a twisted mesentery) and colon (in either sigmoid or cecum which are more mobile). 成年人肠扭转较常见,发生在小肠(围绕着扭曲的肠系膜)和结肠(发生在乙状结肠或是盲肠,它不固定)机会是均等的。
- A unit of frequency equal to one cycle per second. 赫兹频率的单位,等于每秒一周
- high frequency surface ware radar 高频地波雷达
- The effect of the detuning of the stiffness of drilling spindle on the frequency of double spindle drilling machine is discussed by using perturbation theory of nearly equal frequencies. 运用近频摄动理论分析了双轴钻床钻轴刚度失谐后对钻轴系统固有振动频率的影响。
- High Frequency Surface Wave Radar 高频表面波雷达
- It is equal to me whether he comes or not. 他来不来对我都一样。
- high frequency surface wave radar (HFSWR) 高频地波雷达
- I was bored with work not equal to my abilities. 我对于那些跟自己能力不相称的工作感到厌倦。
- The treaty was concluded on equal terms. 在平等的基础上订立了条约。
- He speaks Arabic and English with equal ease. 他说阿拉伯语和英语都一样自如。