The controller selects and adjusts composition of the gas and flow rate according to contaminants present within the ion beam, or lack thereof, as well as total or partialpressureanalysis.
METHODS: Partial correlation analysis was used to analyze correlation between blood pressure and anthropometric parameters among children.
方法:用偏相关分析法分析儿童血压与人体测量指标之间的相关关系。
3
Constant conductance method USES partialpressure measurement technology, which has no strict request to outgassing rate of mass spectrum analysis chamber.