信噪比

The signal-to-noise ratio is always a key factor to limit the development of passive laser detection system.

系统信噪比一直是制约激光探测武器性能的关键性因素之一。

But NMR imaging technique is a technique of low signal-to-noise ratio and long imaging time.

但是，磁共振成象技术是一种信噪比很难提高的成象时间长的技术。

Signal-to-noise ratio is determined by the ratio of the desired signal power to the sum of all of .

信噪比是有效信号功率和其他所有信号功率的比率。

Experimental results indicate a pronounced improvement in signal-to-noise ratio by using the proposed algorithm.

试验结果表明，改进演算法的信噪比得到明显改善。

The explicit expression of the output signal-to-noise ratio of the system was obtained based on linear system theory.

基于线性系统理论，得到了系统输出信噪比的表达式。

Features are: small loss of luminous energy, simple structure, and small size.

这种激光接收及回波装置具有光能量损耗小、结构简单、体积小等特点；同时它能够提高信噪比，增大通信和识别距离；另外，这种激光接收及回波装置由于采用了布拉格声光调制器，从而具有更好的调制效果。

Taken CDF9/7 filter as an example,this method can decrease the multiplications of lifting scheme by 25%,and can improve the performance considerably.

以CDF9／7滤波器为例，该简化措施能够减少25％的乘法，并可以使JPEG2000的峰值信噪比有一定的提高。

And the coherent interaction of light and atoms has provided the effective way for quantum information transmission exactly from the quantum state of light field to the quantum state of particles.

在量子信息的存储和传输过程中，光场的量子噪声将会对信息提取的信噪比产生一定的影响。

In the end, the photoelectric preamplifier's output Signal Noise Ratio and the laser frequency stability are tested.

最后，对光电前放输出信噪比和稳频精度进行了测试。

As we know, if one mode of the electromagnetic field is prepared in a squeezed state, the quantum fluctuation of one of its quadrature components can be lower than that of the corresponding part in a coherent state and that of the other is higher, and we can tune the signal-to-noise ratios of its quadrature components: one of the quadratures can be used to absorb the quantum-mechanical noise, while the other one serves to transmit an extremely well-defined signal.

由于压缩态中光场某一分量的量子涨落可以小于相干态中的量子涨落，即可以小于量子涨落的最小值，因此可以用来改变信号传递的信噪比，从而在低噪声通讯、弱信号探测、高精密测量等方面具有重要的应用前景。

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。