老年性退行性心脏瓣膜病临床分析

为了更好的认识老年性退行性心瓣膜病(SDHVD)及该病特点，笔者观察了30例经彩超检出的SDHVD患者，结果认为SDHVD的年龄标准以50岁为宜，SDHVD是老年人心律失常的主要病因，左心房扩大为其病理生理基础之一，室上性心律失常为其典型的心律失常；从超声上观察SDHVD主要为左心瓣膜受累，尤其是主动脉瓣．     

体育事业与市场经济的协调发展

在市场经济发展的条件下，我国体育功能发生着极为深刻的、显的、实质性的变化。市场经济下体育功能的发挥是与市场经济下体育运行的特点相联系的，是由体育特有的功能结构所决定的，它们极大地推动我国体育事业的发展。     

城市路面径流雨水铅含量的测定

采用微波消解技术作为测定城市路面径流雨水中铅的预处理方法，研究了碘化钾一甲基异丁基甲酮（KI—MIBK）萃取火焰原子吸收分光光度法（AAS）测定城市路面径流雨水中的微量铅。这种消解方法只需12min就可达到对含铅水样完全消解的目的，该方法无论从时间上还是从能耗上明显优于样品的传统电热板加热消解法。测定结果表明，这种方法的精密度和准确度均取得了满意的效果，变异系数为1．93％～3．82％，加标回收率为95％～105％。     

满足Hamilton图必要条件的非Hamilton图的最小例子

找到一个满足Hamilton图必要条件的非Hamilton图的最小例子.     

Superconvergence of Continuous Finite Elements with Interpolated Coeffcients for Initial Value Problems of Nonlinear Ordinary Differential Equation

In this paper, n-degree continuous finite element method with interpolated coefficients for nonlinear initial value problem of ordinary differential equation is introduced and analyzed. An optimal superconvergence u-uh = O(hn+2), n ≥ 2, at (n + 1)-order Lobatto points in each element respectively is proved. Finally the theoretical results are tested by a numerical example.     

低阶C-Bézier曲线的升阶

C- Bézier曲线是在 Bézier曲线基础上作了改进 ,因此具有与 Bézier曲线类似的性质 .本文主要研究的是 C- Bézier曲线从 3阶到 4阶 ,4阶到 5阶 ,5阶到 6阶的升阶转换     

Dating formation of natural gas pools using fluid inclusion data from reservoirs

A method has been suggested which is based on the homogenization temperatures and other data of fluid inclusions from a reservoir rock, with the combination of burial and geothermal history of the hosted rock, to date the gas reservoir formation. On the basis of this, a case study of the Carboniferous-Permiangas pools in the Ordos Basin has been conducted. The results have shown that the reservoir sandstones of the gas pool were filled by gases during 125-150 Ma, earlier in the southern area and later in the northern area, which is consistentwith the basin's geological and geochemical background under which the gas pools formed.