We investigate the possibility of the usage of displaced current in Langmuir probe measurement theoretically and experimentally.The displaced current flows through the self-generated or artificial capacitance of the r...We investigate the possibility of the usage of displaced current in Langmuir probe measurement theoretically and experimentally.The displaced current flows through the self-generated or artificial capacitance of the reference electrode under an alternative sweep voltage.It can increase the total current afforded by the reference electrode,and eliminate the interference deriving from the finite plasma sheath resistance of the reference electrode.The results in both theory and experiment lead to the conclusion that the usage of displaced current is valid and more efficient with a floating probe method.This method is applied in some harsh plasma environments when the grounded chamber wall can easily be contaminated by the dielectric.展开更多
目的:探讨降钙素原(procalcitonin,PCT)、C反应蛋白(C-reactive protein,CRP)、白细胞介素-6(interleukin-6,IL-6)及肺功能指标与儿童喘息性肺炎严重程度的关系。方法:选取2021年10月—2022年10月福建医科大学附属闽东医院收治的126例...目的:探讨降钙素原(procalcitonin,PCT)、C反应蛋白(C-reactive protein,CRP)、白细胞介素-6(interleukin-6,IL-6)及肺功能指标与儿童喘息性肺炎严重程度的关系。方法:选取2021年10月—2022年10月福建医科大学附属闽东医院收治的126例喘息性肺炎患儿为研究对象。收集所有患儿的临床资料,根据病情的严重程度将所有患儿分为轻中度组和重度组。分析分组情况,并比较两组临床资料,分析肺功能指标及PCT、CRP、IL-6与儿童喘息性肺炎严重程度的相关性。结果:126例喘息性肺炎患儿中轻中度患儿87例,重度患儿39例。轻中度组CRP、IL-6、PCT水平均低于重度组患儿,第1秒用力呼气容积(forced expiratory volume in one second,FEV_(1))、用力肺活量(forced vital capacity,FVC)、FEV_(1)占预计值的百分比(FEV_(1)%pred)、FEV_(1)占FVC的比值(forced expiratory volume in one second/forced vital capacity,FEV_(1)/FVC%)、呼气峰流速(peak expiratory flow,PEF)均高于重度组,差异有统计学意义(P<0.05)。儿童喘息性肺炎严重程度与PCT、CRP、IL-6水平均呈正相关,与FEV_(1)、FVC、FEV_(1)pred%、FEV_(1)/FVC%、PEF均呈负相关(P<0.05)。结论:PCT、CRP、IL-6及肺功能指标与儿童喘息性肺炎病情严重程度密切相关,对临床诊疗有着较强的指导意义。展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 10675121,10705028 and 10835009the ITER Domestic Program of China under Grant Nos 2009GB107000 and 2010GB107000.
文摘We investigate the possibility of the usage of displaced current in Langmuir probe measurement theoretically and experimentally.The displaced current flows through the self-generated or artificial capacitance of the reference electrode under an alternative sweep voltage.It can increase the total current afforded by the reference electrode,and eliminate the interference deriving from the finite plasma sheath resistance of the reference electrode.The results in both theory and experiment lead to the conclusion that the usage of displaced current is valid and more efficient with a floating probe method.This method is applied in some harsh plasma environments when the grounded chamber wall can easily be contaminated by the dielectric.
文摘目的:探讨降钙素原(procalcitonin,PCT)、C反应蛋白(C-reactive protein,CRP)、白细胞介素-6(interleukin-6,IL-6)及肺功能指标与儿童喘息性肺炎严重程度的关系。方法:选取2021年10月—2022年10月福建医科大学附属闽东医院收治的126例喘息性肺炎患儿为研究对象。收集所有患儿的临床资料,根据病情的严重程度将所有患儿分为轻中度组和重度组。分析分组情况,并比较两组临床资料,分析肺功能指标及PCT、CRP、IL-6与儿童喘息性肺炎严重程度的相关性。结果:126例喘息性肺炎患儿中轻中度患儿87例,重度患儿39例。轻中度组CRP、IL-6、PCT水平均低于重度组患儿,第1秒用力呼气容积(forced expiratory volume in one second,FEV_(1))、用力肺活量(forced vital capacity,FVC)、FEV_(1)占预计值的百分比(FEV_(1)%pred)、FEV_(1)占FVC的比值(forced expiratory volume in one second/forced vital capacity,FEV_(1)/FVC%)、呼气峰流速(peak expiratory flow,PEF)均高于重度组,差异有统计学意义(P<0.05)。儿童喘息性肺炎严重程度与PCT、CRP、IL-6水平均呈正相关,与FEV_(1)、FVC、FEV_(1)pred%、FEV_(1)/FVC%、PEF均呈负相关(P<0.05)。结论:PCT、CRP、IL-6及肺功能指标与儿童喘息性肺炎病情严重程度密切相关,对临床诊疗有着较强的指导意义。
