Dear Editor, As a promising multi-agent systems(MASs) operation, autonomous interception has attracted more and more attentions in these years, where defenders prevent intruders from reaching destinations.So far, most...Dear Editor, As a promising multi-agent systems(MASs) operation, autonomous interception has attracted more and more attentions in these years, where defenders prevent intruders from reaching destinations.So far, most of the relevant methods are applied in ideal environments without agent damages. As a remedy, this letter proposes a more realistic interception method for MASs suffered by damages.展开更多
Nitrogen-14(^(14)N)overtone(OT)spectroscopy under fast magic angle spinning(MAS)conditions(>60 kHz)has emerged as a powerful technique for observing correlations and distances between ^(14)N and ^(1)H,owing to the ...Nitrogen-14(^(14)N)overtone(OT)spectroscopy under fast magic angle spinning(MAS)conditions(>60 kHz)has emerged as a powerful technique for observing correlations and distances between ^(14)N and ^(1)H,owing to the absence of the first-order quadrupolar broadenings.In addition,^(14)N^(OT) allows selective manipulation of ^(14)N nuclei for each site.Despite extensive theoretical and experimental studies,the spin dynamics of ^(14)N^(OT) remains under debate.In this study,we conducted experimental investigations to assess the spin dynamics of ^(14)N^(OT) using the rotational-echo saturation-pulse double-resonance(RESPDOR)sequence,which monitors population transfer induced by a^(14)N^(OT) pulse.The ^(14)N^(OT) spin dynamics is well represented by a model of a two-energy-level system.Unlike spin-1/2,the maximum excitation efficiency of ^(14)N^(OT) coherences of powdered solids,denoted by p,depends on the radiofrequency field(rf-field)strength due to orientation dependence of effective nutation fields even when pulse lengths are optimized.It is also found that the p factor,contributing to the ^(14)N^(OT) spin dynamics,is nearly independent of the B0 field.Consequently,the filtering efficiency of RESPDOR experiments exhibits negligible dependence on B0 when the ^(14)N^(OT) pulse length is optimized.The study also identifies the optimal experimental conditions for ^(14)N^(OT)/^(1)H RESPDOR correlation experiments.展开更多
基金supported by the Science and Technology Project of State Grid Corporation of China, China (5100202199557A-0-5-ZN)。
文摘Dear Editor, As a promising multi-agent systems(MASs) operation, autonomous interception has attracted more and more attentions in these years, where defenders prevent intruders from reaching destinations.So far, most of the relevant methods are applied in ideal environments without agent damages. As a remedy, this letter proposes a more realistic interception method for MASs suffered by damages.
文摘目的探讨血清Mas相关G蛋白偶联受体X2(Mas-related G protein-coupled receptor X2,MRGPRX2)以及细胞因子白介素(interleukin,IL)-4、IL-5、IL-6、IL-13、IL-23、IL-33水平与慢性自发性荨麻疹(chronic spontaneous urticaria,CSU)的相关性。方法收集2021年2月至2023年9月在复旦大学附属华山医院皮肤科就诊的55例CSU患者及同期21例健康体检者的基本临床信息和实验室数据,并评估CSU患者的疾病活动度和严重程度。采集所有受试者的外周血,通过酶联免疫吸附试验(enzyme-linked immunosorbent assay,ELISA)检测MRGPRX2,用Luminex多重检测技术检测血清IL-4、IL-5、IL-6、IL-13、IL-23、IL-33水平。采用Spearman相关性分析评价CSU患者的生物标志物与其他参数的相关性,logistic回归分析CSU发生的影响因素。结果CSU组患者血清MRGPRX2水平高于对照组[2.41(0,11.51)ng/mL vs 0(0,2.86)ng/mL,P=0.015],IL-23水平高于对照组[0.09(0.04,0.56)pg/mL vs 0.05(0.03,0.08)pg/mL,P=0.033]。两组受试者其他细胞因子水平差异无统计学意义。重度和非重度CSU患者MRGPRX2及细胞因子水平差异无统计学意义。相关性分析结果显示,CSU患者的血清MRGPRX2水平与IL-4(r=0.345,P=0.010)、IL-6(r=0.395,P=0.003)水平正相关。Logistic回归分析显示,血清MRGPRX2≥0.055 ng/mL、IL-23≥0.135 pg/mL是CSU发生的独立危险因素(P<0.05)。结论CSU患者血清MRGPRX2和IL-23水平升高,二者可能参与CSU发病。
文摘Nitrogen-14(^(14)N)overtone(OT)spectroscopy under fast magic angle spinning(MAS)conditions(>60 kHz)has emerged as a powerful technique for observing correlations and distances between ^(14)N and ^(1)H,owing to the absence of the first-order quadrupolar broadenings.In addition,^(14)N^(OT) allows selective manipulation of ^(14)N nuclei for each site.Despite extensive theoretical and experimental studies,the spin dynamics of ^(14)N^(OT) remains under debate.In this study,we conducted experimental investigations to assess the spin dynamics of ^(14)N^(OT) using the rotational-echo saturation-pulse double-resonance(RESPDOR)sequence,which monitors population transfer induced by a^(14)N^(OT) pulse.The ^(14)N^(OT) spin dynamics is well represented by a model of a two-energy-level system.Unlike spin-1/2,the maximum excitation efficiency of ^(14)N^(OT) coherences of powdered solids,denoted by p,depends on the radiofrequency field(rf-field)strength due to orientation dependence of effective nutation fields even when pulse lengths are optimized.It is also found that the p factor,contributing to the ^(14)N^(OT) spin dynamics,is nearly independent of the B0 field.Consequently,the filtering efficiency of RESPDOR experiments exhibits negligible dependence on B0 when the ^(14)N^(OT) pulse length is optimized.The study also identifies the optimal experimental conditions for ^(14)N^(OT)/^(1)H RESPDOR correlation experiments.
