查询词典 signal noise ratio

In the third chapter, the problem of WCDMA network capacity has been introduced from the point of wireless planning. Through the analysis on WCDMA system load factor, the interference level allowance as well as the signal to noise ratio, the relation among WCDMA system capacity, coverage and the grade of service is demonstrated. The method to compute system parameters, such as traffic volume, system capacity, load factor, disturbance allowance and plot radius is also presented.

第三章则从无线规划的角度提出了WCDMA网络的容量问题，通过对WCDMA系统的负荷因子、干扰电平容限以及信噪比的分析计算，阐述了WCDMA系统中容量和覆盖范围及服务质量三者之间的关系，并详细讨论了WCDMA无线规划中业务量、系统容量、负荷因子、干扰容限和小区半径等系统参数的确定。

In this paper,it presents that the two parameters of objective evaluation of color image quality,color difference mean square error and color difference peak signal-to-noise ratio based on the model of S-CIELAB.

对JEPG2000、加白噪音和图像传输中产生位错的三类失真共180幅彩色图像进行了CD-PSNR参量计算，并与国际上已经给出的主观评价结果进行了比较。

A high-performance compander system guarantees extremely high dynamic range, an optimal signal-to-noise ratio and an ultra-wide audio transmission range.

具有互调功能的压缩扩展器确保极大的动态范围，极佳的信噪比和极好的有效频宽。

If the thickness of the colored glass and the band width of the narrow-band filter now on hand is encreased properly, fine signal-to-noise ratio and resolving capability of fluorescence imaging can be obtained.

根据有色玻璃的吸收特性，实验时适当增加光在玻璃中的行程和带宽，使信号和背景光的透过率之比增大，从而得到较好的荧光像的信噪比和分辨本领，提高了图像目视探测的灵敏度。

Parameters of the exciters were optimized to determine the operating point in saturation curves,and obtain the optimal signal-to-noise ratio.

建立了缺陷漏磁场的有限元仿真模型，研究了励磁线圈的形状、励磁电流对检测信号的影响，获得最佳的信噪比。

To improve the measuring accuracy and increase the signal-to-noise ratio in ultrasonic detection of concrete damage, a frequency-modulated ultrasound transmission method was firstly developed.

为提高混凝土超声检测的信号噪声比，提高测量精度，研究脉冲压缩调频超声发射的方法。

Pre-Tertiary oil reservoirs in the South Yellow Sea are old and deeply buried, and there are some difficult problems to be solved in the seismic explorations such as weak reflection energy, low signal-to-noise ratio and poor imaging quality.

南黄海前古近系油气储层时代老、埋藏深，地震勘探中仍存在反射能量弱、信噪比低和成像质量差等难题。

Simulations show the effectiveness and feasibility to reduce the loss of surds and to enhance the SNR (Signal-to-noise Ratio).

该方法在很大程度上抑制了噪声，又减少了语音段清音的损失，提高了信噪比。仿真结果表明了该方法的可行性和有效性。

Applying the method in Tuwu porphyry copper deposit terrain covered with loose stones or soil, signal-to-noise ratio and accuracy have been improved significantly over the traditional refraction.

该法在土屋斑岩铜矿区的应用，表明在提高信噪比方面比较传统方法有明显的提高。

Only oneA/D converter is needed to complete complex quadrature translation and digital downconversion, get in-phase component and quadrature component in digital field, and also,after intra-pulse compression is done, the signal-to-noise ratio is raised, and inter-pulsecompression is done in digital field, and finally, high range resolution profile is got.Two-step stretch processing method for MMW high-resolution RADAR is presented.

计算并优化了毫米波雷达中频信号带通采样的最佳采样频率，应用现有的集成电路技术实现对中频信号的直接采样、用一个A／D转换器在数字域完成复数正交变换，在数字域完成下变频、获得同相信号和正交相信号、完成对子脉冲的脉内压缩、完成对脉内压缩信号的第二次脉间压缩，从而获得高分辨一维距离像。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。