In this paper,we prove that there exists a unique local solution for the Cauchy problem of a system of the incompressible Navier-Stokes-Landau-Lifshitz equations with the Dzyaloshinskii-Moriya interaction and V-flow t...In this paper,we prove that there exists a unique local solution for the Cauchy problem of a system of the incompressible Navier-Stokes-Landau-Lifshitz equations with the Dzyaloshinskii-Moriya interaction and V-flow term inR^(2) and R^(3).Our methods rely upon approximating the system with a perturbed parabolic system and parallel transport.展开更多
目的探讨血清高迁移率族蛋白B1(high mobility group box protein 1,HMGB1)及降钙素原(procalcitonin,PCT)水平对新生儿坏死性小肠结肠炎(necrotizing enterocolitis,NEC)诊断和病情评估的价值。方法选取2017年1月~2020年3月海口市妇幼...目的探讨血清高迁移率族蛋白B1(high mobility group box protein 1,HMGB1)及降钙素原(procalcitonin,PCT)水平对新生儿坏死性小肠结肠炎(necrotizing enterocolitis,NEC)诊断和病情评估的价值。方法选取2017年1月~2020年3月海口市妇幼保健院收治的75例新生儿NEC作为病例组和60例健康新生儿作为对照组。75例NEC新生儿根据修正Bell分期分为Ⅰ期(n=28),Ⅱ期(n=37)和Ⅲ期(n=10),根据75例患儿30天的预后情况,将其分为存活组(n=58)和死亡组(n=17)。对照组于出生3天后、病例组于治疗前检测血清HMGB1及PCT水平变化。应用ROC曲线分析血清HMGB1及PCT水平对新生儿NEC诊断及病情评估的价值。结果病例组血清HMGB1(15.60±4.85μg/L vs 3.18±1.14μg/L)及PCT(1.74±0.92ng/ml vs 0.03±0.01 ng/ml)水平明显高于对照组(t=13.628,10.427,P<0.05)。死亡组血清HMGB1(24.50±7.13μg/L vs 9.24±3.18μg/L)及PCT(3.02±1.35ng/ml vs 0.85±0.38 ng/ml)水平明显高于存活组(t=16.217,12.308,P<0.05),差异均有统计学意义。Ⅱ~Ⅲ期血清HMGB1(20.16±6.37μg/L vs 10.54±3.20μg/L)及PCT(2.85±1.30 ng/ml vs 0.94±0.42 ng/ml)水平均明显高于Ⅰ期,差异均有统计学意义(t=8.263,7.624,均P<0.05)。ROC曲线分析显示,HMGB1及PCT两项联合诊断新生儿NEC的曲线下面积(0.872,95%CI:0.814~0.930)最大,其敏感度和特异度较高,分别为87.4%和83.5%。HMGB1及PCT两项联合预测新生儿NEC死亡的曲线下面积(0.893,95%CI:0.836~0.952)最大,其敏感度和特异度较高,分别为89.0%和86.4%。结论血清HMGB1及PCT水平在新生儿NEC中明显升高,且与患儿病情严重程度相关,两项联合检测对新生儿NEC诊断及病情评估具有一定价值。展开更多
文摘In this paper,we prove that there exists a unique local solution for the Cauchy problem of a system of the incompressible Navier-Stokes-Landau-Lifshitz equations with the Dzyaloshinskii-Moriya interaction and V-flow term inR^(2) and R^(3).Our methods rely upon approximating the system with a perturbed parabolic system and parallel transport.
文摘目的探讨血清高迁移率族蛋白B1(high mobility group box protein 1,HMGB1)及降钙素原(procalcitonin,PCT)水平对新生儿坏死性小肠结肠炎(necrotizing enterocolitis,NEC)诊断和病情评估的价值。方法选取2017年1月~2020年3月海口市妇幼保健院收治的75例新生儿NEC作为病例组和60例健康新生儿作为对照组。75例NEC新生儿根据修正Bell分期分为Ⅰ期(n=28),Ⅱ期(n=37)和Ⅲ期(n=10),根据75例患儿30天的预后情况,将其分为存活组(n=58)和死亡组(n=17)。对照组于出生3天后、病例组于治疗前检测血清HMGB1及PCT水平变化。应用ROC曲线分析血清HMGB1及PCT水平对新生儿NEC诊断及病情评估的价值。结果病例组血清HMGB1(15.60±4.85μg/L vs 3.18±1.14μg/L)及PCT(1.74±0.92ng/ml vs 0.03±0.01 ng/ml)水平明显高于对照组(t=13.628,10.427,P<0.05)。死亡组血清HMGB1(24.50±7.13μg/L vs 9.24±3.18μg/L)及PCT(3.02±1.35ng/ml vs 0.85±0.38 ng/ml)水平明显高于存活组(t=16.217,12.308,P<0.05),差异均有统计学意义。Ⅱ~Ⅲ期血清HMGB1(20.16±6.37μg/L vs 10.54±3.20μg/L)及PCT(2.85±1.30 ng/ml vs 0.94±0.42 ng/ml)水平均明显高于Ⅰ期,差异均有统计学意义(t=8.263,7.624,均P<0.05)。ROC曲线分析显示,HMGB1及PCT两项联合诊断新生儿NEC的曲线下面积(0.872,95%CI:0.814~0.930)最大,其敏感度和特异度较高,分别为87.4%和83.5%。HMGB1及PCT两项联合预测新生儿NEC死亡的曲线下面积(0.893,95%CI:0.836~0.952)最大,其敏感度和特异度较高,分别为89.0%和86.4%。结论血清HMGB1及PCT水平在新生儿NEC中明显升高,且与患儿病情严重程度相关,两项联合检测对新生儿NEC诊断及病情评估具有一定价值。
