复合因素作用下人体功能状态的评价

Evaluation of Somatic Eigenstate Under Combined Hypoxia, Heat, Noise and Vibration

实验采用区组正交设计,安排144人次的试验条件。各试验因素选定4种量级水平(缺氧高度:3、4、5、6km;温度:25、30、35、40℃;振动:0.2、0.4、0.6、0.8g·40Hz;噪声:85、90、95、100dBA)。受试者为24名健康男性青年。测试指标有:呼吸、循环、脑电、功效、体温、暂时听阈改变、症状及体征等。运用主成分分析法,求取了各指标与各系统的生理反应特征值。采用专家经验与统计学分析、定量指标与定性指标相结合的方法,结合各系统的特征,划分了不同实验人次中各系统的状态——舒适、功效、安全、耐限。取各系统的最重状态为各次实验的人体功能状态。

Twenty-four young men were exposed to hypoxia (simulated altitude: 3、4、5、6 km), heat (25、30、 35、40℃), vibration (0.2、0.4、0.6、0.8、peak g, 40 Hz), and noise (85、90、95、100 dBA). Orthogonal block design was employed to assign combined stresses to each of the 144 tests. Measurements were made of respiration, circulation, EEG, performance, auditory temporary threshold shift (TTS), body temperature, symptoms and signs. Evaluation values of the parameters and measurements were computed by means of principal component anaiysis. Expert evaluation principle was introduced as one of the criteria for the classification of the state of each measurement (comfort, performance, safety and tolerable limit), which was carried out using statistical analysis in combination with the magnitude estimation of certain physiological reactions. The most serious state of measurements of every system was chosen as the somatic eigenstate in the test.