A new polychaete genus and species of the Kongsfjorden,Spitsbergen, Svalbard

Glyphochaeta laudieni, a new genus and species of the “Spionidae”, is described from the Arctic. The specimens were collected from the Kongsfjorden, Spitsbergen, Svalbard, in a marine grotto. Glyphochaeta laudieni was associated with colonies of unidentified Bryozoa. This new genus and species is characterized by a prostomium with frontal horns, the absence of branchiae and sabre chaetae, and the presence of grooved spines which replace hooded hooks in some chaetigers of the middle body region. These spines are associated with glandular organs situated in neuropodia. The significance of characters for determining the systematic position of Glyphochaeta within “Spionidae” is discussed. Glyphochaeta laudieni is probably related to Pygospio elegans.     

Cytogenetic studies of Hynobiidae (Urodela). XIV. Analysis of the chromosome of a Chinese salamander, Batrachuperus pinchonii (David)

The chromosome number of a Chinese salamander, Batrachuperus pinchonii, was re-examined. Adults and embryonic specimens had a diploid number of 66, with 33 bivalents during meiosis, in contrast to previous reported results. Furthermore, when C-banding analysis was performed with embryos, chromosomes with banding patterns homoeologous to those of Salamandrella keyserlingii and Hynobius species were found. It appears, therefore, that Batrachuperus, Salamandrella and Hynobius might be derived from a common ancestral species in eastern Asia. Received 22 August 1997; received after revision 14 October 1997; accepted 20 November 1997     

最重要的学问是汉字

不欣赏汉字者,是因为不懂汉字,特别是不懂汉字的笔画结构和发音原理,只有弄懂之后才会明白,原来人类文明是从汉字开始的,任何学科的起点,都应该从汉字开始。     

图的L(d~■,1~■)-标号

将图的L(d ,1) 标号问题推广到L(dm,1n) 标号 ,并将其转化成该图的m 方图的L(d ,1n) 标号 .给出了求一般简单图的L(d ,1n) 标号的两种算法 .     

(m,n)-GP内射模

给出了(m，n)—GP内射模的定义，得到了(m，n)—GP内射模的特征截面，并利用所得的结果给出了(m，n)—GP内射模的方程组特征．     

3n+1问题证明范围的减缩及其叠代数列的构造性质

证明了3n 1问题中对数列{T(n)}（n∈N）的讨论。可归结得到{To(m)}(m=3（mod6）的情形，利用分类分段法得到了相应奇数列{To(m）}(m=3(mod6））的构造性质，同时对3n 1问题直接证明的条件进行了探讨。     

中心构型和线性方程组

利用线性方程组给出了经典n-体问题中中心构型的一个等价定义，并以此来确定某构型是否是中心构型。这给出了一个统一而又简洁的方法来理解已知结果并给出一些新结果。     

我国开放式基金实际价值评价研究

对开放式基金实际价值进行科学合理的评价是开放式基金发展的关键环节，这种评价需要一个完整的评价体系来充分反映和描述。静态评价是指对基金资产的净值进行评价，动态评价是指对基金资产的流动性进行评价。     

相同元素分组数的简便算法

n个相同元素分成r(r相似文献   

普通高校军训工作制度化问题的探讨

本从国家对普通高校学生军训的法规及条例的逐步完善，各省军区承训部队在普通高校军训中的作用，以及目前各普通高校的军训现状等方面，提出了促进普通高校军训工作制度化问题。