药物学领域的电子束辐射技术——一种新型抗结核制剂

为了根除疾病,药物学研究的重点已经从单纯的药物化学领域扩展到化学、生物学、电子学等多学科结合领域.本文介绍了俄罗斯科研人员运用电子束加速器固定技术研制的新型抗结核药物制剂,该制剂改善了原有的抗结核药物的内涵,加强了药物制剂中生物活性物质的作用.     

一个新的正项级数敛散性判别定理及应用

利用偶数项、奇数项与一般项的关系 :a2n ≤pan,a2n+ 1≤qan+ 1(p +q<1)和a2n≥pan,a2n+ 1≥qan+ 1(p,q>0 ,p +q≥ 1) ,给出了正项级数一个简捷而又较常规方法更为精细的敛散性判别法 ,它是一个全新的定理 ,有广泛的适用性 .     

双比值判别法与对数判别法的比较

双比值判别法是近年来提出的判别正项级数敛散性的一种新方法，它强于传统的达朗贝尔判别法与拉贝判别法．关于双比值判别法与对数判别法的强弱关系问题是值得探讨的．通过对这两种判别法中所含极限的存在性关系的研究，可以得出对数判别法强于双比值判别法的结论．     

4—导数量子引力的重整化

对４—导数量子引力进行图图类型和发散度分析，并且利用系数、场和规范交换重整化方法使该４—导数理论重整化。     

面向稀疏数据集的聚类算法

在聚类过程中数据可能呈现稀疏性,如果仍用传统的欧式距离作为聚类指标,则聚类的质量和效率将会受到严重的影响。受到信息论中KL(Kullback-Leibler)散度的启发,采用基于KL散度的相似性度量方法,先描述数据的整体分布,进而对数据进行聚类。研究结果表明,最后通过实验验证本算法的有效性。这种方法可以利用簇中元素提供的信息来度量不同簇之间的相互关系,克传统欧式距离的缺点,提升算法准确度。     

引力三顶点的计算与4—导数量子引力的发散分析

通过计算引力三顶点的４－导数项贡献，并由此分析了４－导数量子引力的发散圈图，结果表明，仍有一些新的发散存在于该种高导数引力理论     

一种有效特征词发现的贝叶斯文本分类方法

根据信息学理论和贝叶斯语义模型，提出一种有效特征词发现方法，利用该方法对训练文本的原始文本特征词集进行聚类，对测试文本进行分类计算和类别标注。闭式测试的结果表明，文本识别的正确率达到了90％以上，该算法对互联网信息处理有较好的应用价值。     

Phylogeography of regional fauna on the Tibetan Plateau: A review

The studies of uplift and glaciations of the Tibetan Plateau are summarized, and a series of recent case studies of the endemic species based on DNA sequences are detailed. In general, these molecular data show that all the organisms originated from Early Pliocene to Late Miocene, and then multi-stages of divergence/speciation occurred within each taxa following their original occupation on the plateau, mainly as a result of periodic glacial cycles and geographic isolation. The regional fauna may have undergone several range contractions and expansions during the Pleistocene glaciations. However, the population expansion and refugia may vary in space, time, and extent. The regional fauna of the Tibetan Plateau may be combinations of ancient movement from adjacent zoogeographical regions, speciation in situ, and postglacial colonization from adjacent areas. Geomorphic and climatic changes on the plateau definitely have a remarkable influence on the regional and adjacent biogeographic patterns, and the mechanism is very complex.     

谈“别解”的理解过程和生成基础

探讨修辞的生成过程和理解过程可以为修辞的研究打开新的视窗,同时也是深化修辞研究的一条必由之路。别解作为一种修辞方式,其实质是人们换用了另外一个语言样板来对词义进行重新理解。别解的理解大致可以分为异质感的产生、自返性排查、语义类推、意义潜势的激活等几个具体过程。别解的生成必须以语言知识、百科知识等作为基础,但同时也离不开人的认知习惯。别解可能会使词语的意义发生“歧变”,成为词义发展演变的一种特殊途径。     

A comparison between two distance-based discriminant principles

A distance-based classification procedure suggested by Matusita (1956) has long been available as an alternative to the usual Bayes decision rule. Unsatisfactory features of both approaches when applied to multinomial data led Goldstein and Dillon (1978) to propose a new distance-based principle for classification. We subject the Goldstein/Dillon principle to some theoretical scrutiny by deriving the population classification rules appropriate not only to multinomial data but also to multivariate normal and mixed multinomial/multinormal data. These rules demonstrate equivalence of the Goldstein/Dillon and Matusita approaches for the first two data types, and similar equivalence is conjectured (but not explicitly obtained) for the mixed data case. Implications for sample-based rules are noted.