另类免费视频,欧美亚洲精品一区二三,我要看免费毛片,久久一er精这里有精品,日韩精品视频在线免费观看,成人亚洲在线,欧美亚洲在线

《2005ATS ERS肺功能測定的一般事項》內(nèi)容預(yù)覽

All terms and abbreviations used here are based on a report of the American College of Chest Physicians/ATS Joint Committee on Pulmonary Nomenclature. The metrology definitions agreed by the International Standards Organization (ISO) are recommended  and some important terms are defined as follows.
Accuracy is the closeness of agreement between the result of a measurement and the conventional true value. Repeatability is the closeness of agreement between the results of successive measurements of the same item carried out, subject to all of the following conditions: same method, same observer, same instrument, same location, same condition of use, and repeated over a short space of time. In previous documents, the term reproducibility was used in this context, and this represents a change towards bringing this document  in line with the ISO.
Reproducibility is the closeness of agreement of the results of successive measurements of the same item where the individual measurements are carried out with changed conditions, such as: method of measurement, observer, instrument, location, condi-tions of use, and time. Thus, if a technician tests a subject several times, this is looking at the repeatability of the test. If the subject is then given a bronchodilator drug and tested again after 30 min, one needs to know the reproducibility of the test in order to make a decision on this comparison. The measurement range for a recording device is the range over which the manufacturer indicates the device complies with the recommendations below.
Equipment resolution is the smallest detectable change in measurement.


點擊下載完整版：《2005ATS ERS肺功能測定的一般事項》