频率

The dither deviation of the master oscillator frequency is unidirectional and lower than the undithered frequency.

主振荡器的频率抖动偏差是单向的，比undithered频率较低。

The average zero-crossing frequency of zero crossing detector is divided, the former generation is evaluated, the characteristic of Dopper frequency tracking loop in SPA-Ⅱ system is summarized by comparison between the two systems.

本文还对过零截点器的平均过零频率进行了推导，由此对处理机-Ⅱ型的前一代系统作了估价，在此基础上，通过比较，总结了处理机-Ⅱ型系统多卜勒频率跟踪环的特点。

To measure the satellite oscillator frequency accurately is of great significance for transmitting time and frequency information by satellite,and the difficult point of the measurement is to deal with the Doppler frequency shift.

星载振荡器频率的测量对利用通信卫星进行标准时间和频率传递有重要的意义，测量的难点是多普勒频移的处理。

The numerical results indicated that the mixing time decreases about linearly with increasing current intensity. The mixing time decreases first then increases with increasing current frequency and comes up to its minimum value at 30Hz. Applying the traveling magnetic field to the uptake or downtake when the exciting current intensity is 200 A at 10 Hz, the mixing time can be shortened by 9%~17%. With the operating conditions kept unchanged, shorter mixing time is available if applying the traveling magnetic field to the uptake instead of downtake, and the time can be shortened by 18%~26% if applying the magnetic field to both the uptake and downtake. Moreover, the mixing time decreases with increasing argon blowing flowrate, and the time comes down to its minimum value if the argon blowing flowrate is 1 600 NL/min. After the moment, the mixing time increases with argon blowing flowrate.

计算结果表明：混匀时间随电流强度的增大而减小，并且近似成线性关系；混匀时间随电流频率的增加先减小后增大，并且在30Hz 时达到极小值；在励磁电流强度为200A ，频率为10Hz 的条件下，在上升管或下降管施加行波磁场混匀时间可缩短9%~17%；在相同操作条件下，在上升管处施加行波磁场混匀时间小于在下降管施加行波磁场的混匀时间；同时在上升管和下降管施加行波磁场，混匀时间可缩短18%~26%；混匀时间随吹氩量的增大而减小，在吹氩量为1600NL/min 时混匀时间达到极小值，吹氩量继续增大时，混匀时间反而增大。

The measurement method includes adopting two vertically superposed position sensors and one capacitive sensor to measure the time for the liquid drop to pass through, adopting a frequency counter to count frequency and adopting microprocessor to calculate the liquid drop volume.

其方法是采用两个垂直重叠的位置传感器和一个电容传感器，测量液滴下落经过的时间，并由频率记数器对频率记数，而由微处理器计算出液滴体积。

Results:(1) the frequency of menstruation disorder is as high as 49.03 percent, the frequency of dysmenorrhea is up to 90.20 percent.

结果：(1)水上项目女运动员月经不调的发生频率高达49.02%，痛经的发生频率高达90.20%。

The wave velocities of sandstone samples within ultrasonic frequency band are explained by pore fluid local flow and elastic wave scattering mechanism.

同时测量了超声波频段速度和频率的关系，指出在25KHz-1.2MHz的频率范围内存在一个速度的峰值，局部流机制和弹性散射机制对速度频散同时起作用。

Experiment shows that any liquid has its own especial electrical resonance frequency, and electrical resonance frequency is related with the characters of the liquid itself. As soon as any of the characteristics of the liquid changed such as component,thickness,density and viscidity,the frequency of the liquid electrical resonance will changed.

利用液体的这种电谐振特性，我们来测量血浆凝固过程中谐振频率的变化；当血浆任何性质发生变化，那么这时的血浆已经不是原来的血浆了，其谐振频率一定会发生变化。

When any of the characteristics of the blood plasma are changed,the electrical resonance frequency of the blood plasma will changed immediately. In the process of blood coagulation, the characteristics of the blood plasma are changed fundamentally. Therefore, it can reflect the process of blood coagulation by measuring the electrical resonance frequency.

实验采用了液体谐振测量装置来测量血浆的电谐振频率，测量系统包括待测溶液，指叉型传感器，振荡电路，SP312等精度频率检测仪，USB数据传输，PC机数据显示以及相应的上位机软件部分组成。

The characteristics of the MHD structure observed in the soft x-ray tomography are as follows. It is constructed with m=2 mode oscillation, so that the magnetic surface is made up of two islands. The structure of the magnetic surface is relatively stable. It rotates in the direction of the electron dia-magnetic drift, and the rotation frequency is the half of the oscillation frequency of soft x-ray signals.

通过SX反演图象分析，MHD型磁面结构的特点：一是m=2模的振荡构成，因而此磁面始终有两个岛组成；二是磁面结构相当稳定，在MHD放电过程中没有明显变化；三是磁面结构整体沿电子逆磁方向极向旋转，旋转的频率是软X射线测量的信号频率的一半。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。