米力农治疗新生儿持续肺动脉高压的临床研究

目的:探讨米力农治疗中重度新生儿持续肺动脉高压的有效剂量.方法:将49例中重度肺动脉高压新生儿分为4组.对照组以硫酸镁治疗.米力农低、中、高剂量组维持量分别为0.25 μ g/(kg·min)、0.5 μ g/(kg·min)、0.75 μ g/(kg·min).结果:(1)米力农中、高剂量组治疗后血气、经皮血氧及肺动脉压均有改善.(2)米力农中、高剂量组治疗后肺动脉压均有下降.结论:米力农治疗新生儿中重度肺动脉高压有效且安全的维持量为0.75 μ g/(kg·min).     

Leakage of an eagle flight feather and its influence on the aerodynamics

We investigate how the barb of bird feathers is changed along both the rachis and barb.To investigate the microstructures and the mechanical behaviors of barbs,a series of barbs are manually cut from an eagle’s primary feather to observe the cross sections.Aλ-like cross section with a tiny hook is observed at the right feet at each section.Afterwards,a measurement of the setup system is developed to evaluate the leakage ratio of a feather followed by a numerical predicting approach based on the CFD method.It is found that the air leakage increases linearly against the pressure,and the predicted results coincide well with the experimental results.Finally,the influences of leakage of the flight feather on both steady and unsteady aerodynamics are studied.     

Brusselator方程解的存在性和稳定性

本文研究了一种Brusselator方程的。用不变区域证明了解的全局存在性，并通过构造上下解给出了非常数定态解渐进稳定的条件。最后推出吸引域。     

一类艾滋病传播的数学模型的定态非负解

利用分歧理论讨论带扩散问题艾滋病传播数学模型定态非负解及全局性质．     

净化污水的能手——水葫芦

水葫芦又名凤眼兰,是人们熟悉的多年生漂浮性缩根性水生草本植物。它的繁殖力特别强,能不断地长出腋芽,发育成新的植株。据各地试验,十株水葫芦生长八个月,就能繁殖成六十万株。它的须根特别发达,在水中能大量吸收水中的污泥和有毒物质,     

COUPLED FIXED POINTS OF SKEW INCREASING OPERATORS AND APPLICATIONS

1Intr0ducti0nIllthisPaPerwestudythefordpointsandcouPledfiXedpointsofskewincreasing0PeratorsandtheiraPplicaion.LetXbeaBanachsPaCcwithapartialorderingintr0ducedbythcc0neK-LctF:X-Xbean0peraorinX.FiscaJledinCreasingifF2SFgf0raJl2Sy.Asiswellkllown,inthetheorerns0fhapointforincreasingoPerbo,thereisaninterestinginterreboi0nbetweenPr0pertiesofKandF,thatisThoorem1l1I'I2ILetXbeaBanachpee,partiaJlyorderedbythecolleKGX.Let[a,b]beanordeintervalandF:[a,b]- [a,b]increasin.ThenFhasabop0intif0…     

铰接式自卸汽车平顺性仿真

针对开发的重型铰接式自卸汽车,应用多体动力学分析软件ADAMS建立了铰接式自卸汽车虚拟样机模型,并进行了随机路面下的平顺性仿真研究,为评价铰接式自卸汽车驾驶员乘坐舒适性提供了一定的参考依据。     

带扩散系数的艾滋病传播模型的定态非负解

利用算子的固有值性质、α性质、半内部性质及分歧理论讨论了一类带扩散系数的艾滋病传播的数学模型，对定态非负解的分布及全局性质给出了具有理论及实际意义的结论．     

一类单种群模型的非负群及其渐近性质

讨论了具有迁移现象且环境非均匀的单种群Ｌｏｇｉｓｔｉｃ模型的非负解，利用上、下解方法讨论了非负解的存在性及其渐近状态。     

实H空间对称线性单调算子固有值问题及应用

本文在实Ｈｉｌｂｅｒｔ空间中讨论了带权算子的对称线性单调算子的固有值问题，得出了最小正固有值及其相应的固有向量的一些相关结论，并给出了它们在某些边值、初边值问题等方面的应用