This data set contains 4096 observations of inductance plethsymography data sampled at 50Hz starting at 1229.98 seconds. This is a regular time series object.
在50Hz开始在1229.98秒的的电感plethsymography采样数据，该数据集包含4096个观察。这是一个普通的时间序列对象。
I am grateful to David Moshal and Andrew Black of the Department of Anaesthesia, University of Bristol for permission to include this data set.
我感谢大卫Moshal和安德鲁·黑部麻醉，英国布里斯托尔大学的许可，包括这组数据。
This data set was used in Nason, 1996 to illustrate noise reduction with wavelet shrinkage and using cross-validation for choosing the threshold.
利晨，1996年，该数据集被用于说明降噪小波收缩，并使用交叉验证选择的阈值。
A plethysmograph is an apparatus for measuring variations in the size of parts of the body. In this experiment the inductance plethysmograph consists of a coil of wire encapsulated in a belt. A radio-frequency carrier signal is passed through the wire and size variations change the inductance of the coil that can be detected as a change in voltage. When properly calibrated the output voltage of the inductance plethysmograph is proportional to the change in volume of the part of the body under examination.
甲体积描记器是一种装置，用于测量的身体部位的大小的变化。在这个实验中的电感体积描记器由皮带封装在一个线圈。的无线频率载波信号是通过改变电感的线圈的电压变化，可以检测到的电线和大小变化。当正确校准的电感体积描记器的输出电压是检查身下的部分的体积的变化成比例。
It is of both clinical and scientific interest to discover how anaesthetics or analgesics may alter normal breathing patterns post-operatively. Sensors exist that measure blood oxygen saturation but by the time they indicate critically low levels the patient is often apnoeic (cease breathing) and in considerable danger. It is possible for a nurse to continually observe a patient but this is expensive, prone to error and requires training. In this examples the plethysmograph is arranged around the chest and abdomen of a set of patients and is used to measure the flow of air during breathing. The recordings below were made by the Department of Anaesthesia at the Bristol Royal Infirmary after the patients had undergone surgery under general anaesthetic. The data set (shown below) shows a section of plethysmograph recording lasting approximately 80 seconds. The two main sets of regular oscillations correspond to normal breathing. The disturbed behaviour in the centre of the plot where the normal breathing pattern disappears corresponds to the patient vomiting.
它是发现麻醉剂或止痛剂可能会改变正常的呼吸方式，手术后的临床和科研的兴趣。传感器存在测量血氧饱和度的时候，他们表示极低水平患者往往apnoeic的（停止呼吸），并在相当大的危险。这是可能的，不断地观察病人的护士，但，这是昂贵的，容易出错，需要培训。在本实施例的体积描记器的周围配置的一组患者的胸部和腹部，和被用于测量呼吸过程中的空气流动。下面的录音在布里斯托尔皇家医院的麻醉科后，患者在全身麻醉下接受手术。的数据集（如下所示）示出了部分的体积描记器记录，持续约80秒。定期振荡的两个主要对应于正常的呼吸。在中心的行为紊乱的正常呼吸模式消失的图对应的患者的呕吐。
实例----------Examples----------
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data(ipd)
## Not run: ts.plot(ipd)[＃不运行：ts.plot（IPD）]
发表于 2012-10-1 17:22:52
