调谐

In this paper,we introduced the progress of chirped fiber grating and its application in optical communication field and sensor field.

文章简要介绍了Chirped光纤光栅的制作方法与传感应用，分析了Chirped光纤光栅的调谐原理和调谐性能。

Outstanding tuning performance can be achieved by using this scheme, other periodical poled crystals can be analyzed in fixed wavelength band with similar method too.

该方案有极佳的调谐性能，并适用于其他晶体，以实现在特定波段上的宽带高速OPA波长调谐。

A grating tuned directional output device consisting of a rotating platform,a infrared grating and a plane mirror is introduced based on an optical angle reflector to realize the directional and positional outputs of different wavelengths,which has obtained 60 laser spectral lines with a resolution of 0.01 μm.

介绍了该激光器中基于光学角反射器原理设计的光栅调谐定向输出装置，并对其进行了理论计算和论证，实现了不同波长激光的定向、定位输出，获得调谐激光输出谱线超过60条，谱线分辨率优于0.01 μm。

D Since this antenna is really a tuned circuit, it also acts as a preselector. It only receives well in a narrow bandwidth of a few hundred kilohertz.

d这个天线具有调谐电路，因此它伴演预调谐器的角色，它对几百千赫的窄带信号接收得很好。

With a flip of this lever you can instantly lower the tuning from E b down to low B. A fine tuner allows this detuned note to be precisely set.

这个杠杆您可以立即降低的 E b从低到乙的罚款，调谐器调谐允许此失谐照会精确设定。

Sapphire dopped with Ti3+ is the best material of the tunable solid laser.

钛蓝宝石是目前最优异的固体宽带调谐激光材料，用于制作飞秒脉冲可调谐激光器。

In the system a HCN gas absorption cell has been used as wavelength reference.

为实现高精度光纤非本征法布里-珀罗传感器和布拉格光纤光栅波长解调，设计并实现了一种基于可调谐光纤激光器的光纤传感波长解调系统，系统采用具有51条吸收谱线的氰化氢气体吸收池为波长参考基准，采用三次多项式拟合的方法来确定可调谐光纤F-P滤波器的波长与驱动电压的对应关系。

Thus, the neurons with sharp frequency tuning and high Q 10 -dB values showed that there was certain relationship between echolocation call and frequency tuning of IC neurons in the leaf-nosed bats.

结果表明，大蹄蝠回声定位信号与下丘神经元频率调谐存在相关性，表现为最佳频率在回声定位信号主频附近的神经元频率调谐曲线的Q10-dB值较大，具有很强的频率分析能力。

In order to explore the relationship between the echolocation call or signal of leaf-nosed bats and frequency tuning of inferior collicular neurons, the echolocation calls of the leaf-nosed bats were recorded using bat detector and frequency tuning curves of inferior collicular neurons were obtained by extracellular recording.

采用超声监测仪录制超声信号和细胞外电生理记录下丘神经元的频率调谐曲线(frequency tuning curves， FTCs)的方法，探讨了大蹄蝠回声定位信号与下丘(inferior colliculus， IC)神经元频率调谐之间的相关性。

The results showed that the echolocation calls of the leaf-nosed bats were constant frequency-frequency modulation signals with 2-3 harmonics and the second one among these three harmonics was its dominant frequency. The constant frequency components of three harmonics (Mean±SD, n=18 ) were 33.3±0.2 kHz, 66.5±0.3 kHz, and 99.4±0.5 kHz, respectively. In examined FTCs of 72 IC neurons, their Q 10 -dB values ranged from 0.5 to 95.4 (9.2±14.6) and the neurons whose best frequency around the dominant frequency had sharp frequency tuning.

结果发现，大蹄蝠回声定位叫声为恒频-调频(constant frequency-frequency modulated，CF-FM)信号，一般含有2~3个谐波，第二谐波为其主频，CF成分频率(Mean±SD，n=18)依次为：(33.3±0.2)、(66.5±0.3)、(99.4±0.5)kHz；电生理实验共获得72个神经元的频率调谐曲线，Q10-dB值的范围是0.5~95.4(9.2±14.6， n=72)，最佳频率(best frequency，BF)在回声定位主频附近的神经元具有尖锐的频率调谐特性。

Plunder melds and run with this jewel!

掠夺melds和运行与此宝石！

My dream is to be a crazy growing tree and extend at the edge between the city and the forest.

此刻，也许正是在通往天国的路上，我体验着这白色的晕旋。