求解化学反应动力学参数的一种方法

反应级数的确定在化学动力学研究中非常重要,现给出了利用计算机和用微分法确定反应级数的方法.为了使编程的程序简短、高效,采用MATLAB语言作为编程语言.     

三相异步电动机断相保护选择探讨

小型三相异步电动机的断相保护方法，不少刊物都有过介绍。此处仅根据我单位的实际情况和使用经验，介绍根据不同情况采取的三种较为有效的方法。     

和函数S（z）连续的一个充要条件

本文给出了复变连续函数项级数∑Un(z)的和函数S(z)连续的一个充要条件，即给出亚一致收敛的概念，使得对在复平面内有界闭集D上的复变连续函数Um(z)(n=1，2，……)，∑Un(z)=S(z)在D上连续的充要条件是∑Un(z)在D上亚一致收敛于S(z)。     

关于Ermakoff定理的注记

本文将著名的ErTnakoff定理进行引伸,使之应用到正项级数敛散性判定上更加灵活,并同时获得了一些有趣的结果.     

关于Lucas函数的三次均值计算

研究了Lucas函数的三次均值计算问题,采用了递推,归纳,猜想等方法,给出一个精确的计算公式：Ar（N）=∑n n〈N α′（n）（r=1,2,3）.     

丁广义割圆序列的线性复杂度

Minimal polynomials and linear complexity of binary Ding generalized cyclotomic sequences of order 2 with the two-prime residue ring Zpq are obtained by Bai in 2005. In this paper, we obtain linear complexity and minimal polynomials of all Ding generalized cyclotomic sequences. Our result shows that linear complexity of these sequences takes on the values pq and pq-1 on our necessary and sufficient condition with probability 1/4 and the lower bound （pq - 1）/2 with probability 1/8. This shows that most of these sequences are good. We also obtained that linear complexity and minimal polynomials of these sequences are independent of their orders. This makes it no more difficult in choosing proper p and q.     

关于AR-MA双重时序模型平稳解的存在性

本文在参考文献[1]、[2]的基础上讨论了AR-MA双重时序模型存在平稳解的条件,获得了AR(1)-MA(1)和AR(1)-MA(2)存在平稳解的充要条件(不必假定白噪声序列为正态)。本文的方法完全适用于讨论一般的AR(1)-MA(q)模型的平稳解的存在性,而且对讨论AR-AR模型也有所启发。     

<Emphasis Type="Italic">Mrakia psychrophila</Emphasis> sp. nov., a new species isolated from Antarctic soil

The yeast strain （Y18） was isolated from a soil sample collected from Fildes Peninsula, Antarctica. The strain is a psychrophilic yeast with optimum and maximum growth temperatures of 10 ℃ and 18 ℃, respectively. Teliospores were formed after 7 d on malt agar, when the germination of teliospores was observed. Both inositol and D-glucuronate were assimilated. Positive results of the DBB （diazonium blue B） color reaction, urease test, and starch formation were observed. The major CoQ is Qs. All results indicated that Y18 belongs to the genes of Mrakia. The 18S rDNA sequence analyses showed that Y18 is closely related to Mrakiafrigida. DNA-DNA relatedness study, and some biochemistry characteristics indicated that Y18 represents a new species for which Mrakia psychrophila sp. nov. is proposed.     

二项式函数f(x)=(1+x)α(α≠0)的幂级数展开式及其应用

详细介绍了二项式函数f(x)=(1+x)α(α≠0)的幂级数展开式、收敛域的确定及其二项式级数在数学中的应用.     

蛋白质序列的一种新的二维图形表示

基于氨基酸的五字母模型,提出蛋白质序列的一种二维图形表示方法,然后证明这种图是非退化的.最后用该方法给出了8个物种的β球蛋白序列的图形表示.