频率

Its purpose is to develop an all digital method that can complish despreading and carrier frequency measuring by the use of modern signal processing technique and to manufacture a set of frequence measuring and correcting system to fit the project demand.

论文的目的是利用现代信号处理技术，研究一种全数字化的解扩及载波频率测量方法，并利用该方法研制一套频率测量及校正系统，以满足工程需要。

We note from the further studies that in the crystals, which sharing the similar crystal structures and coordinational environments, the magnitude of the Stokes shift of the luminescence of the dopant ion is in line with the average covalency of the replaced lattice site. This is because that the nature of Stokes shift is the energy transfer from the luminescent ion to the host lattice. The value of this energy is determined by the frequency of the host lattice in which the frequency is controlled by the chemical bond characters.

更深入的研究发现，在晶体结构和中心离子配位环境非常相似的系列晶体中，掺杂离子发射光的Stokes位移值与其所取代格位的平均共价性成正比的关系，这是由于Stokes位移的本质是发光离子在发光过程中向基质以光波辐射的形式传递能量，这一能量的大小是由基质的振动频率决定的，而基质的化学键性质恰恰决定着基质的振动频率。

Then based on CWMS, we propose a new method to enhance the resolution of seismic traces. Firstly, we divide the seismic signal into proper segments by Gabor molecule-windows adaptive to the signal, where each segment is regarded stationary, and then transform it into the Gabor domain. Secondly, we deal with the amplitude spectrum for each segment to expand the frequency band of the spectrum in the Gabor domain. Finally, taking inverse Gabor transform on modified time-frequency coefficients, we get the high-resolution signal.

然后基于变子波模型，提出了一种新的提高地震记录分辨率的方法：第一步，用自适应于地震记录的Gabor分子窗把地震记录恰当地划分成若干片断，每段内信号近似平稳，然后将地震记录变换到时间-频率域；第二步，在变换域对每个分子窗内信号的振幅谱进行处理以拓宽频带；最后把处理后的时间-频率域函数反变换回时间域得到提高分辨率后的结果。

In different nuclear background materials, except for the 1st editing site of 48-2, editing frequency of sterile cytoplasms was all lower than that of fertile cytoplasms.

在不同核背景材料中，除48-2材料的第1位点外，不育胞质的编辑频率均低于可育胞质的编辑频率。

Under the same experimental condition as ever but changing the frequency of magnetic field, we discover that descaling is the best when the frequency of magnetic field is 700 Hz.

在其它实验条件不变的情况下，若仅改变电磁场的频率，发现当频率为700赫兹左右时除垢效果最佳。

It is based on the Jaynes-Cummings model with a large detuning.

其中，原子跃迁频率与各腔场频率是大失谐的。

When the detuning between the atomic transition frequency and the frequency of each mode is much large, the probability of atomic transition can be neglected.

当原子上、下能级的跃迁频率与腔场的每个模的频率都失谐较大时，原子的跃迁几率可以忽略。

In the electronics technique, the frequency is one of the most basic parameters, and with many give or get an electric shock three quantity of the diagraph projects, diagraphs all have a very close relation as a result, so the diagraphs of frequency seem to be more important.

毕业论文字数：9647 页数：27）摘要在电子技术中，频率是最基本的参数之一，并且与许多电参量的测量方案、测量结果都有十分密切的关系，因此频率的测量就显得更加重要。

The spontaneous firing rate of NE-ergic neurons was positively correlated with the discharge of estradiol injection in the diestrus rats.

非发情期雌鼠LC中NE能神经元自发放电频率与注射雌二醇后放电频率之间存在着正相关。

Effects of the downhole temperature on axial vibration natural frequency of drill string in deep wells is investigated.

分析了井下温度对钻柱轴向振动固有频率的影响，推导出了井下任意温度时钻柱轴向振动固有频率的计算公式。

Do not gum up the work by telling mother what we are going to do .

别告诉母亲我们要干的事，那会把事情搞糟的。

In recent years, application of the partial prestressed concrete beam s is developed.

近年来，随着部分预应力砼梁应用的推广，发现我国规范所采用的名义拉应力法的计算结果不稳定。