In this paper, we find that under a diffeomorphic of nonlinear geodesic equations are concerned with light-like extremal surfaces in curved spaeetimes. It is interesting to transformation of variables, the light-like ...In this paper, we find that under a diffeomorphic of nonlinear geodesic equations are concerned with light-like extremal surfaces in curved spaeetimes. It is interesting to transformation of variables, the light-like extremal surfaces can be described by a system Particularly, we investigate the light-like extremal surfaces in Schwarzschild spacetime in detail and some new special solutions are derived systematically with aim to compare with the known results and to illustrate the method.展开更多
In this paper we investigate the equations for light-like extremal surfaces in Minkowski space R^1＋（1＋n）. We show that the light-like assumption is compatible with the Cauchy problem and give a necessary and suff...In this paper we investigate the equations for light-like extremal surfaces in Minkowski space R^1＋（1＋n）. We show that the light-like assumption is compatible with the Cauchy problem and give a necessary and sufficient condition on the global existence of classical solutions of the Cauchy problem. Based on this, we obtain entire light-like extremal surfaces by solving the Cauchy problem explicitly when such necessary and sufficient condition holds. Finally, some discussions and related remarks are given.展开更多
目的通过研究缺氧缺血性脑病(HIE)新生儿血清神经纤维轻链(NF-L)、水通道蛋白9(AQP9)、纤维蛋白原样蛋白2(FGL2)水平的变化,分析三者与新生儿行为神经评估(NABA)评分的相关性。方法选取2022年1月~2024年7月山西省儿童医院收治的203例HI...目的通过研究缺氧缺血性脑病(HIE)新生儿血清神经纤维轻链(NF-L)、水通道蛋白9(AQP9)、纤维蛋白原样蛋白2(FGL2)水平的变化,分析三者与新生儿行为神经评估(NABA)评分的相关性。方法选取2022年1月~2024年7月山西省儿童医院收治的203例HIE患儿为研究组,根据病情程度分为轻度组(n=63)、中度组(n=81)和重度组(n=59),另选同期的健康新生儿203例为对照组,酶联免疫吸附试验(ELISA)检测血清NF-L、AQP9、FGL2水平,收集分析一般临床资料。受试者操作特征(ROC)曲线分析NF-L、AQP9、FGL2及NABA评分对新生儿重度HIE的诊断价值;Pearson法分析血清NF-L、AQP9、FGL2与NABA评分的相关性。结果与对照组相比,研究组血清NF-L(14.78±1.67ng/ml vs 10.65±1.21ng/ml)、AQP9(61.82±6.29pg/ml vs 42.62±4.31pg/ml)、FGL2(189.69±20.26ng/ml vs 132.51±14.84ng/ml)水平显著升高,差异具有统计学意义(t=28.533、35.877、32.440,均P<0.05);中度组、重度组血清NF-L(14.68±1.67ng/ml、18.62±2.03ng/ml),AQP9(63.51±6.44pg/ml、69.63±7.03pg/ml),FGL2(195.68±20.84ng/ml、210.65±22.36ng/ml)水平显著高于轻度组(11.32±1.33ng/ml、52.32±5.41pg/ml、162.35±17.55ng/ml),NABA(34.89±3.51分、29.88±3.43分)评分显著低于轻度组(36.54±1.52分),差异具有统计学意义(t_(中度组)=4.616~16.729,t_(重度组)=17.276~33.701,均P<0.05);NF-L、AQP9、FGL2与NABA评分均呈负相关(r=-0.432、-0.421、-0.402,均P<0.05);NF-L、AQP9、FGL2、NABA联合诊断患儿重度病情的曲线下面积(AUC)显著高于各项单独诊断,差异具有统计学意义(Z=2.066~3.307,均P<0.05)。结论HIE患儿血清NF-L、AQP9、FGL2水平显著升高,与NABA评分相关,可能成为评估HIE患儿病情的标志物。展开更多
基金Supported by National Natural Science Foundation of China under Grant Nos.11026151,11101001the Anhui Provincial University’s Natural Science Foundation under Grant No.KJ2010A130
文摘In this paper, we find that under a diffeomorphic of nonlinear geodesic equations are concerned with light-like extremal surfaces in curved spaeetimes. It is interesting to transformation of variables, the light-like extremal surfaces can be described by a system Particularly, we investigate the light-like extremal surfaces in Schwarzschild spacetime in detail and some new special solutions are derived systematically with aim to compare with the known results and to illustrate the method.
文摘In this paper we investigate the equations for light-like extremal surfaces in Minkowski space R^1＋（1＋n）. We show that the light-like assumption is compatible with the Cauchy problem and give a necessary and sufficient condition on the global existence of classical solutions of the Cauchy problem. Based on this, we obtain entire light-like extremal surfaces by solving the Cauchy problem explicitly when such necessary and sufficient condition holds. Finally, some discussions and related remarks are given.
文摘目的通过研究缺氧缺血性脑病(HIE)新生儿血清神经纤维轻链(NF-L)、水通道蛋白9(AQP9)、纤维蛋白原样蛋白2(FGL2)水平的变化,分析三者与新生儿行为神经评估(NABA)评分的相关性。方法选取2022年1月~2024年7月山西省儿童医院收治的203例HIE患儿为研究组,根据病情程度分为轻度组(n=63)、中度组(n=81)和重度组(n=59),另选同期的健康新生儿203例为对照组,酶联免疫吸附试验(ELISA)检测血清NF-L、AQP9、FGL2水平,收集分析一般临床资料。受试者操作特征(ROC)曲线分析NF-L、AQP9、FGL2及NABA评分对新生儿重度HIE的诊断价值;Pearson法分析血清NF-L、AQP9、FGL2与NABA评分的相关性。结果与对照组相比,研究组血清NF-L(14.78±1.67ng/ml vs 10.65±1.21ng/ml)、AQP9(61.82±6.29pg/ml vs 42.62±4.31pg/ml)、FGL2(189.69±20.26ng/ml vs 132.51±14.84ng/ml)水平显著升高,差异具有统计学意义(t=28.533、35.877、32.440,均P<0.05);中度组、重度组血清NF-L(14.68±1.67ng/ml、18.62±2.03ng/ml),AQP9(63.51±6.44pg/ml、69.63±7.03pg/ml),FGL2(195.68±20.84ng/ml、210.65±22.36ng/ml)水平显著高于轻度组(11.32±1.33ng/ml、52.32±5.41pg/ml、162.35±17.55ng/ml),NABA(34.89±3.51分、29.88±3.43分)评分显著低于轻度组(36.54±1.52分),差异具有统计学意义(t_(中度组)=4.616~16.729,t_(重度组)=17.276~33.701,均P<0.05);NF-L、AQP9、FGL2与NABA评分均呈负相关(r=-0.432、-0.421、-0.402,均P<0.05);NF-L、AQP9、FGL2、NABA联合诊断患儿重度病情的曲线下面积(AUC)显著高于各项单独诊断,差异具有统计学意义(Z=2.066~3.307,均P<0.05)。结论HIE患儿血清NF-L、AQP9、FGL2水平显著升高,与NABA评分相关,可能成为评估HIE患儿病情的标志物。
基金supported by the National Natural Science Foundation of China (21077007)the Discipline and Postgraduate Education Foundation (005000541212014)+1 种基金the Funding Project for Academic Human Resources Development in Institutions of Higher Learning under the Jurisdiction of Beijing Municipality (PHR201107104)Hong Kong Baptist University Foundation (FRG2/09‐10/023)~~
