否定毛细永动机的唯象理论

本文从毛细现象自身所满足的规律、弯曲液面所具有的性质着手，给出了一种否定毛细永动机的唯象理论。     

大型阀门动水关闭试验与分析

本文介绍了Ф2500蝴蝶阀的动水关闭试验试验的方法和过程,描述了试验过程中出现的各种现象及产生的原因.     

大体积混凝土施工温度应力分析与控制

文章采用有限元结构分析软件对某拱座进行了混凝土施工期间的温度应力计算分析,计算过程考虑了混凝土的弹性模量、徐变等参数随龄期变化和分层浇筑对拱座温度应力产生的影响,提出了防止施工过程中由于外界温度变化及水泥水化热等因素引起裂缝的措施,并通过部分监控数据对拱座温度变化规律进行了分析。     

Misuses of biology in the context of the paranormal

Summary Public suspicion of science stems from science's challenging of perceptions and myths about reality, and a public fear of new technology. The result is a susceptibility to pseudoscience. In claiming that creation science is as valid as evolution the creationists misquote scientists and seek to spread their own scientific myths concerning a young age for the earth, an act of creation based on a particular literalist interpretation of the Christian Bible and a single worldwide flood. They use methods of debate and politics, rather than scientific research. A selection of their arguments is examined and the nature of the evidence for evolution is discussed. Problems with the creation science model are noted. In the myth of the hundredth monkey phenomenon, original research is misquoted to denigrate scientific research and support sentimental ideas of paranormal events. The misuse of science is seen as damaging to society because it reduces the effective gathering and application of scientific information. However, pseudoscience provides a valuable guide to gaps in public scientific education.     

“变截面管中跨声速气流”一文引理的证明

本文对T·P·Liu教授关于“变截面管中跨声速气流”一文的关键性引理给出一个清楚的证明,以使这篇有影响的开创性论文更加完美。     

支承松动故障转子系统共振区动态特性分析

根据工程实际,建立了松动故障转子系统的非线性动力学模型,利用KBM法对模型进行分析,得到故障转子在共振区的动力学行为特征如共振区提前且持续区间较长,二倍频、三倍频等高次谐波明显以及故障转子系统具有"软式"非线性特性等;分析了支承刚度、转轴刚度等系统参数对松动故障转子系统非线性特性的影响·与已有文献的实验结果比较,结论与实验结果比较吻合·结果可为该类故障转子系统的监测和故障诊断提供参考·     

Classification of Medical Brain Images

Since brain tumors endanger people‘s living quality and even their lives, the accuracy of classification becomes more important. Conventional classifying techniques are used to deal with thosedatasets with characters and numbers. It is difficult, however, to apply them to datasets that include brain images and medical history (alphanumeric data), especially to guarantee the accuracy.For these datasets, this paper combines the knowledge of medical field and improves the traditional decision tree. The new classification algorithm with the direction of the medical knowledge not only adds the interaction with the doctors, but also enhances the quality of classification. The algorithm has been used on real brain CT images and a precious rule has been gained from the experiments. This oaoer shows that the ahzorithm works well for real CT data.     

关于湍流统计模式局限性的讨论

湍流是极为普遍的流动现象,湍流统计模式是目前预测复杂湍流的唯一工具.本文讨论了Navier Stokes方程与湍流的关系,分析了湍流统计模式的局限性,认为一个好的湍流统计模式应当包含尽可能多的湍流脉动结构信息.     

超声喷泉灼热的实验方法

本文提出了超声喷泉灼热的实验方法．并测量到由自来水组成的这种超声喷泉使塑料靶灼热到大约250℃的温度．作者认为，超声空化的热效应和机械效应的协同传递是这种超声喷泉的热现象的机制．     

生物活性材料义眼台

本文采用羟基磷灰石与生物活性玻璃制做义眼台。用液态化学反应法合成羟基磷灰石，取适宜数量的生物活性玻璃与之混合，经高温烧结制成义眼台，并进行了动物实验和临床应用。动物实验表明材料具有优异的生物相容性和一定的生物活性，临床应用效果良好。本材料是制做义眼台的新型材料。本文就材料研究、动物实验、义眼台的制做工艺进行了探讨。