陶瓷先驱体聚硅烷的合成与表征

以甲基氢二氯硅烷为单体,利用超声波条件下Wurtz聚合的方法,合成了可溶性聚硅烷,研究了对二溴苯和萘对反应的影响,并用红外光谱(IR)、凝胶渗透色谱(GPC)、X射线衍射(XRD)对产物进行了表征.结果表明:对二溴苯和萘均能使聚合反应平稳进行;在含有对二溴苯的反应体系中,所得聚硅烷的分子量较大,聚硅烷的陶瓷产率较高.对聚合机理作了初步探讨.     

三色Ramsey数尺（Cm1，Cm2，Cm3）研究

用r种颜色对图G的所有边着色，记着第i色的边构成的子图为G1,如果存在一种着色方法使得对所有的1≤i≤r都满足Hi￠Gi，则称图G对于（H1，H1，…．Hr）可r着色．Ramsey数尺（H1，H2，…，Hr）是使得完全图Kn对于（H1．H2，…，Hr）不可r着色的最小正整数n，令m1〉m2≥m3，Erdoes等给出了当m1足够大时R（Cm1，Cm2，Cm3）的值．通过对m1不是足够大的情况进行研究，证明了当m≥5时，R（Cm，C3m,C3）=5m=4；并给出了当m1≤7时R（Cm1，Cm2，Cm3）的值．     

一种新的分类方法——属性均值聚类属性支持向量机(AMC-ASVM)

在属性均值聚类(AMC)与支持向量机(SVM)的基础上,提出了一个新的模式分类算法——基于(属性)聚类的属性支持向量机算法(AMC-ASVM)。主要思想是利用属性均值聚类网络得到的具有概率信息(权重)的样本,来训练属性支持向量机,从而得到分类器。这种方法结合了属性聚类的稳定性与属性支持向量机可以利用加权样本的优点,适合处理具有强噪声的数据。另外,该方法也可以看作是堆近邻分类法的自然推广。在实验部分,将其用于结肠癌基因表达数据的处理。实验结果显示了AMC-ASVM在一定程度上优于最近邻,Boosting,堆近邻,SVM等方法。     

一种基于FP-tree的最大频繁项目集挖掘算法

挖掘最大频繁项目集是许多数据挖掘中的关键问题．为克服早期基于Apriori的最大频繁项目集算法中的缺点,相继有多种挖掘最大频繁项目集方法被提出．其中对基于FP-tree的最大频繁项目集挖掘算法比较多,但对FP-tree中的结点的频度计数关注的很少．通过对FP-tree结构进行了仔细分析后,在FP-tree中结点的频度计数和集合理论的基础上,提出了一种新的最大频繁项目集挖掘算法USDMFIA(using set to discover maximum frequent itemsets algorithm)．通过分析比较,显示此算法是有效的．     

FTSC薄板坯四孔水口冶金特点

利用PHOENICS软件对FTSC薄板坯结晶器四孔浸入式水口形成的结晶器流场、冶金特点进行了优化研究,FTSC薄板坯采用四孔浸人式水口,出口流速小,使紊流和弯月面下速度减至最小.钢流冲击深度浅,对凝固前沿冲击小,有利于初期坯壳的形成及夹杂物的上浮:该水口有两流钢液向上流出,结晶器钢液面温度高,适应了薄板坏连铸保护渣熔化速度快的需要:水口插入深度260mm、水口倾角20°,可保证任何浇铸条件下的最佳流体动力学.     

花(鱼骨)胚胎发育及卵黄囊仔鱼形态的初步观察

运用多种处理方法对花的胚胎发育进行连续观察,并对其卵黄囊仔鱼形态变化进行初步观察与测量。观察结果显示:(1)花胚胎发育可以划分为22个明显的时期,包括7个主要的发育阶段;(2)在(20±1)℃条件下,仔鱼在出膜后的第3天开口摄食,卵黄囊在第7天基本消失,此阶段仔鱼的全长平均日增长率为4．67％,而以第4天增长最快。该实验结果将为花的人工繁殖及苗种培育,特别是为仔鱼在营养转换阶段的培育提供了理论参考。     

Lithostratigraphy and faunal aspects of marine Jurassic rocks in Thailand

Thai marine Jurassic rocks are well exposed in the Mae Sot, Umphang, and Phop Phra areas, less extensively near Mae Hong Son, Kanchanaburi, Chumphon, Nakhon Si Thammarat and Krabi. Generally they rest unconformably on Permian and Triassic, and are overlain by Quaternary strata. Fourteen lithostratigraphic units are defined (in ascending order): Pa Lan, Mai Hung, Kong Mu formations of the Huai Pong Group-Mae Hong Son area; Khun Huai, Doi Yot, Pha De formations of the Hua Fai Group-Mae Sot area; Klo Tho, Ta Sue Kho, Pu Khloe Khi, Lu Kloc Tu formations of the Umphang Group-Umphang area; and Khlong Min Formation-Chumphon, Nakhon Si Thammarat, and Krabi areas. Dominant widespread mudstones, siltstones and sandstones; limestones are confined to the Mae Sot, Phob Phra, Umphang, Kanchanaburi and Mae Hong Son areas; marls are found only in Mae Sot. Sequences are approximately 900 m thick (Mae Sot), 450 m thick (Umphang) and thinner elsewhere, especially the south. Based on ammonites, brackish to marine bivalves, and foraminifera, the beds are dated mainly as ToarcianEarly Bajocian.     

Depositional environments of Bathonian sediments from the Jaisalmer Basin, Rajasthan, western India

The pericratonic sedimentary Jaisalmer Basin, west of the Aravalli Ranges, on the westerly dipping eastern flank of the Indus Shelf, is a principal structural element of Rajasthan. Jurassic sediments in the SE comprise non-marine sandstones and conglomerates to nearshore, brackish to marine sands, silts, clays and carbonates, grouped lithostratigraphically into the Lathi, Jaisalmer, Baisakhi, and Bhadasar formations. The Late Bajocian to Oxfordian Jaisalmer Formation is divided, in ascending order, into the Hamira, Joyan, Fort, Badabag, Kuldhar, and Jajiya members. Fossil records providing a Bajocian to Bathonian age for the lower and middle parts of the formation include: a Late Bajocian coral Isastraea bernardiana (d’Orbigny) in the uppermost Joyan Member; Bathonian ammonite Clydoniceras in the basal part of the Badabag Member; Bathonian foraminiferal/bivalve assemblages in the Fort Member. The topmost bed of the Joyan Member represents the peak of first marine transgression of the Jaisalmer Basin, probably contemporaneous with the Late Bajocian one in the neighbouring Kachchh Basin. Based on faunal studies Bajocian to Bathonian sediments of the Jaisalmer Basin can be broadly correlated with those of the Kachchh Basin. The Fort and Badabag members represent the following depositional environments, in chronological order: (a) brackish to shallow fully marine; (b) fully marine with rapidly fluctuating water energy and sedimentation rates; (c) near-shore to lower shoreface with fluctuating energy conditions, salinity and sedimentation rates; (d) near-shore to shoreface channels and storm-dominated marine above fair-weather wave-base; (e) lagoon with fluctuating low to moderate energy, salinity and sedimentation rates; (f) stormdominated shelf to lower shoreface.     

受污染水源水的生物处理工艺试验研究

通过预曝气增加进水DO含量，改进了生物处理装置的实际运行效果。试验采用常用的陶粒滤池工艺，安装两套相同的反应器，一套反应器采用传统的曝气方法供氧，原水直接进入反应器，另一套反应器的原水先进行纯氧预曝气，使之DO达到超饱和状态，反应器内不再进行曝气。试验结果表明，原水预先充氧达到超饱和状态后进行生物处理，原水中的DO可以满足微生物的需求，各项污染物的去除效果优于采用传统曝气方法供氧的生物处理装置。试验结果表明，开发适用于饮用水生物处理的无泡供氧装置具有现实意义。