| 1. | Raw thermal images acquired by pulsed thermography ( pt ) usually have low signal noise ratio ( snr ) and temperature contrast
摘要脉冲热像检测中直接获取的原始热像往往信噪比较低、对比度较差。 |
| 2. | Experiment results show that in low bit rate environment , the new image compression scheme performs better than jpeg in the aspects of perception and psnr ( peak signal noise ratio )
实验结果表明该算法在低码率下，相比jpeg ，获得了在视觉效果和峰值信噪比方面更好的恢复图像质量。 |
| 3. | Finally , by using mismatched filter technique , optimized code is studied and searched . this kind of code will be used broadly in the future because it has the property of no sidelobe and low snr ( signal noise ratio ) loss
最后，采用失配滤波器技术，研究并计算机搜索了距离旁瓣为零而信噪比损失很小的优化码，该优化码可有良好的应用前景。 |
| 4. | In order to improve signal noise ratio ( snr ) , wavelet denoising is used , and the radar in - pulse characteristics is extracted by wavelet - ridge , radar emitter signal sorting is realized by neural networks
该方法首先对接收到的雷达信号进行小波去噪，达到提高信噪比的目的，然后利用小波脊线法准确提取其脉内特征参数，最后基于神经网络实现信号的分选。 |
| 5. | The maximum likelihood estimator ( mle ) approach is an important one in frequency estimation domain . this approach has the merit such as exhibiting best performance and requiring minimum threshold of signal noise ratio in calculation
最大似然频率估计法是该领域中的一种重要的研究方法；该方法具有估计结果准确，计算所要求的信噪比门限值低等特点。 |
| 6. | This kind of sensor should have enough defect quantitative differentiation and high signal noise ratio . and the data dealing and recognizing is also a very difficult task in the nondestructive defect detection of the wire rope
传感器应该具有足够的缺陷定量分辨能力和高的信噪比，而且对检测信号进行数据处理和定量识别也是钢丝绳缺陷检测系统研究中的难点。 |
| 7. | Not only can gain mismatch of the sigma - delta modulator be minimized , but the overload of the later stage sigma - delta modulator can also b e resolved without sacrificing the signal noise ratios ( snr ) of the over all system
不仅可以减轻积分三角调变器增益不匹配之困扰，并且可以解决后级积分三角调变器容易过负载之问题；然而，却不会让整体系统的讯号杂讯比( snr )降低。 |
| 8. | Based on adaptive quad - tree fractal image encoding scheme , the concept and algorithm of peak signal noise ratio ( psnr ) based on the fractal codes is put forward , and is used to match the similarities between images
本文以自适应四叉树分割的分形图像编码为基础，提出了图像的分形码峰值信噪比的概念和算法，在无须解码的情况下，直接对分形码来量化图像间的相似性。 |
| 9. | Moreover , an optimized lna structure - inter - stage inductor matching - is presented , which can achieve conjugate match of two stages , maximize the forward transmission , sequentially increase the signal noise ratio ( snr ) and reduce the noise figure
并提出了级间匹配电感的设计方案,此优化结构能实现两级之间的共轭匹配,使信号的正向传输最大化,从而增大信噪比,降低了噪声。 |
| 10. | It is difficult for moving dim target to tracking and detect because the signal noise ratio ( snr ) of target is low and it has not texture etc . first of all , this paper introduces the state of researches of dim target detection and tracking in domestic and abroad
本文重点研究了弱小目标检测及其跟踪的方法。研究低信噪比弱小目标的实时检测及跟踪算法,其困难主要为:目标信噪比低,无纹理特征。 |
