ID	原文	译文
39916	（2）PPG和RPPG测量时存在环境光学噪声，以及肤色不同形成的个体差异性较大；	（2） there is ambient optical noise in the PPG and RPPG measurement, and individual difference due to skin color is obvious；
39917	（3）ECG和PPG检测属于接触式，容易带给患者不适感。	（3） the detections of ECG and PPG belong to contact type, which can easily bring discomfort to patients.
39918	基于以上不足，提出了一种基于心冲击图（Ballistocardiogram，BCG）的HRV分析方法，	Based on the shortcomings of the above methods, a HRV analysis method based on ballistocardiogram （BCG） is proposed.
39919	该方法降低了传统设备用于HRV分析的成本，利用非接触检测减轻了患者不适感，	It reduces the cost of traditional equipment for HRV analysis, and uses non-contact detection to alleviate the discomfort of patients.
39920	独特的检测原理避免了个体差异性问题，在长期心血管疾病检测中起着至关重要的作用。	The unique detection principle avoids the problem of individual differences, which plays a vital role in long-term cardiovascular disease prediction.
39921	实验中采用逆传播（Back propagation，BP）神经网络模型对心率异常进行预测分类，准确率达到80%，表明了该方法的先进性和可靠性。	In the experiment, the model of back propagation （BP） neural network is used to predict and classify abnormal heart rate with an accuracy rate of 80%, showing the advancement and reliability of the proposed method.
39922	针对现代电子战电磁环境复杂，复合干扰信号有效特征难提取，识别难度大的问题，提出了一种基于伪平滑魏格纳-威利分布（Smoothed pseudo Wigner-Ville distribution，SPWVD）和改进AlexNet的复合干扰识别算法。	In view of the complex electromagnetic environment of modern electronic warfare, it is difficult to extract the effective features of composite jamming signals and identify them. In this paper, a combined jamming recognition algorithm based on smoothed pseudo Wigner-Ville distribution （SPWVD） and improved AlexNet is proposed.
39923	该算法利用SPWVD对复合干扰信号进行时频分析，	The algorithm uses the SPWVD to analyze the time and frequency of the composite jamming signal.
39924	再利用图像处理技术对时频特征进行降维，	Then the image processing technology is used to reduce the dimension of time-frequency characteristics.
39925	最后结合改进的AlexNet模型，采用多个小的卷积核替代大的卷积核，删除全连接层7和局部响应归一化模块等手段，来减小网络参数从而加快计算速度，完成复合干扰信号的识别。	Finally, combined with the improved AlexNet model, the algorithm uses several small convolution kernels to replace the large convolution kernel, removes the full-connection layer 7 and the local response normalization module to reduce the network parameters and speed up the calculation, so as to realize the recognition of composite jamming signals.