HRV时域与频域指标与左室收缩功能指标之间几乎均无相关性（P>0 .0 5 ） ；
The indexes between HRV and left ventricular systolic function revealed no correlation (P>0.05);
目的：应用心率变异性的频域指标探讨肌电生物反馈中的心脏自主神经系统功能活动的量化改变。
Objective: to explore the change of activities of the cardiac autonomic nervous system in the EMG biofeedback with the quantified index of heart rate variability (HRV).
方法对63例老年糖尿病合并高血压患者(分为不伴有LVH组和伴有LVH组)，分别与对照组进行频域指标分析对比。
Method We studied the frequency domain of 63 aging patients with the disease of diabetes combining hypertension (with LVH and without LVH), comparing with that of control group respectively.
研究了基于积分最小二乘指标的SISO时滞系统频域辨识与频域模型降阶问题。
Based on the integral least_squares index, a new approach to frequency_domain identification and model reduction of SISO systems with delay is proposed.
由参数模型计算的阶跃响应与频率特性上计算时域与频域的动态性能指标才比较合理。
It is more reasonable that the dynamic performance index both in frequency domain and in time domain should be calculated from model calculated frequency response and unit-step response.
应用信号处理相关处理方法对数据进行预处理，时域、频域分析，进行平稳性指标、舒适度计算，得出相关处理结果，输出报表。
Use relative signal processing method to pre-processing data, make time domain and frequency domain analysis, calculate the ride index and comfort, obtain relative results and export reports form.
应用信号处理相关处理方法对数据进行预处理，时域、频域分析，进行平稳性指标、舒适度计算，得出相关处理结果，输出报表。
Use relative signal processing method to pre-processing data, make time domain and frequency domain analysis, calculate the ride index and comfort, obtain relative results and export reports form.
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