Experiment 1: AC voltage-current characteristics of the human skin memristor.

<b>Description</b><br>The AC voltage-current (V-I) characteristics of the human skin memristor were studied in experiment 1. The data was collected from three different skin sites (earlobe, fingertip, forehead) simultaneously. The recordings were done on 28 test subjects. <br><br><b>Experimental Design</b><br>Sinusoidal (with amplitudes of 0.4 V, 0.8 V, and 1.2 V), triangular (amplitude of 1.2 V) and non-periodic voltage signals were applied with six different frequencies (0.05 Hz, 0.1 Hz, 0.25 Hz, 0.5 Hz, 1Hz, 2.5 Hz) for three periods each. The resulting current, i, through the skin was recorded. The sign of each applied voltage signal was randomized. Furthermore, shape and amplitude appeared in a random sequence. For each of these five combinations, a frequency sweep over all six frequencies in a randomized order was applied. The waiting time before a signal with a new frequency was applied was 1 second. The waiting time before a run with a new signal shape or amplitude was 2 seconds. The number of samples per signal period was always 500.<br><br><b>File information</b><br>The recordings are presented in the same order as they were conducted.<br><br><i>"Data_experiment_1 (AC V_I_characteristics)"</i>: The Samples 1 to 1501 in each line reflect 3 periods of the corresponding signal. Sample 1 of each measurement run was distorted by the instrumentation and was set to NaN (not a number) which can be handled by Matlab.<br><br>"<i>Data_EDA (Small signal conductance G, susceptance and DC potential)_Before_and_after_Experiment_1</i>": This file contains EDA data that was measured before and after experiment 1. <br> <br>

<b>数据集说明</b><br>实验1针对人体皮肤忆阻器（human skin memristor）的交流电压-电流（V-I）特性展开研究。数据从28名受试对象的3个不同皮肤部位（耳垂、指尖、前额）同步采集获得。<br><br><b>实验设计</b><br>实验施加了正弦（幅值分别为0.4 V、0.8 V及1.2 V）、三角波（幅值为1.2 V）以及非周期性电压信号，信号覆盖6种不同频率（0.05 Hz、0.1 Hz、0.25 Hz、0.5 Hz、1 Hz、2.5 Hz），且每种信号均持续3个周期，同步记录流经皮肤的感应电流<i>i</i>。每一路施加的电压信号极性均经随机化处理，信号波形与幅值的切换顺序亦为随机。针对上述5种信号组合，均按照随机顺序完成全部6种频率的扫频测试。更换至新频率信号的等待时长为1秒，更换信号波形或幅值的等待时长为2秒。每个信号周期的采样点数固定为500。<br><br><b>文件信息</b><br>所有记录数据均按照实验开展的先后顺序进行排布。<br><br><i>Data_experiment_1（AC V-I特性数据集）</i>：每行数据中的第1至1501号采样点对应单组信号的3个周期。每轮测量的第1个采样点因仪器干扰发生畸变，故被标记为NaN（非数值，Not a Number），可通过Matlab进行处理。<br><br><i>Data_EDA（小信号电导G、电纳与直流电位——实验1前后）</i>：该文件存储了实验1开展前后采集的EDA数据。