Solar quiet daily variation(Sq)are dependent on local time.Herein,we applied the moving superposition method to separate the Sq component of correction observatory data and performed a time diff erence correction on t...Solar quiet daily variation(Sq)are dependent on local time.Herein,we applied the moving superposition method to separate the Sq component of correction observatory data and performed a time diff erence correction on the Sq component according to the longitudinal diff erence between the correction observatory and the field station while maintaining the time of other data components.The data were then reconstructed and used for diurnal-variation correction to improve the accuracy of the daily variations correction resu;lts The moving superposition method employs data of“nonmagnetic disturbance days”obtained 15 d before and after to perform the superposing average calculation on a daily basis,aiming to obtain the Sq of continuous morphological changes.The effect of longitude correction was tested using the observatory record and field survey data.The average correction distance of the test observatories was 2114 km,and the correction accuracies of the H(horizontal component of geomagnetic field),D(geomagnetic declination),and Z(vertical component of geomagnetic field)were improved by 28.4%,45.0%,and 21.7%,respectively;the average correction distance of the field stations was 2130 km,and the correction accuracies of the F(geomagnetic total intensity),D,I(geomagnetic inclination)components were improved by 35.2%,26.7%,and 13.9%,respectively.The test results also demonstrated that the longitude correction eff ect was greater with an increased correction distance.展开更多
基金supported by The Earthquake Science and Technology Program of Hebei Province (Grant Number DZ20190422046).
文摘Solar quiet daily variation(Sq)are dependent on local time.Herein,we applied the moving superposition method to separate the Sq component of correction observatory data and performed a time diff erence correction on the Sq component according to the longitudinal diff erence between the correction observatory and the field station while maintaining the time of other data components.The data were then reconstructed and used for diurnal-variation correction to improve the accuracy of the daily variations correction resu;lts The moving superposition method employs data of“nonmagnetic disturbance days”obtained 15 d before and after to perform the superposing average calculation on a daily basis,aiming to obtain the Sq of continuous morphological changes.The effect of longitude correction was tested using the observatory record and field survey data.The average correction distance of the test observatories was 2114 km,and the correction accuracies of the H(horizontal component of geomagnetic field),D(geomagnetic declination),and Z(vertical component of geomagnetic field)were improved by 28.4%,45.0%,and 21.7%,respectively;the average correction distance of the field stations was 2130 km,and the correction accuracies of the F(geomagnetic total intensity),D,I(geomagnetic inclination)components were improved by 35.2%,26.7%,and 13.9%,respectively.The test results also demonstrated that the longitude correction eff ect was greater with an increased correction distance.
文摘目的探讨感染性心内膜炎(infective endocarditis,IE)患者外周血中性粒细胞外诱捕网(neutrophil extracellular trap nets,NETs)水平与T细胞水平表达和预后的相关性。方法选取2018年11月~2021年2月在青岛阜外心血管病医院治疗的53例IE患者作为IE组,选取同期进行体检的50例健康人群,作为对照组。比较两组血浆NETs水平和T细胞表达水平之间的差异,采用Pearson相关性检验分析血浆NETs水平和T细胞水平表达的相关性。根据IE患者生存情况分为存活组(29例)和死亡组(24例),采用受试者工作特征曲线(ROC曲线)分析血浆NETs水平对IE患者死亡的预测价值。结果IE组患者cf-DNA/NETs(465.15±146.38μg/L),WBC(16.14±5.36)×10^(9)/L,NEUT(75.42±10.25)%,hs-CRP(39.38±10.75g/L),CD3^(+)(66.23±6.74)%,CD4^(+)(44.35±4.26)%和CD4^(+)/CD8^(+)(1.65±0.43)水平均显著高于对照组[135.76±37.52μg/L,(6.24±1.53)×10^(9)/L,(62.28±6.45)%,2.37±1.04g/L,(54.21±5.13)%,(35.14±3.52)%,1.34±0.33],差异有统计学意义(t=18.093,11.036,7.352,22.960,9.505,10.298,5.289,均P<0.01)。血清Alb(35.38±10.75g/L vs 42.15±9.78 g/L)和CD8^(+)水平[(23.75±3.68)%vs(26.75±3.66)%]显著低于对照组,差异有统计学意义(t=-4.039,-4.961,均P<0.01)。IE死亡组cf-DNA/NETs水平显著高于存活组(611.46±102.15μg/L vs 407.53±76.49μg/L),差异均有统计学意义(t=7.007,P<0.01)。血浆cf-DNA/NETs水平与CD8^(+)水平、患者预后不良呈正相关(r=0.282,0.352,均P<0.05),与CD3^(+),CD4^(+)和CD4^(+)/CD8^(+)水平呈负相关(r=-0.424,-0.535,-0.328,均P<0.05)。ROC曲线分析NETs预测IE患者死亡的曲线下面积为0.736(95%CI:0.684~0.829,P<0.01)。结论感染性心内膜炎患者血浆NETs水平显著升高,血浆NETs水平与T细胞水平表达及患者预后不良显著相关,对预测IE患者死亡有一定临床价值。
