英语事序及其基本表达方式

事序是英语的重要语言现象。事序深刻地反映一事物与他事物之间的关系，表达语篇内的命题或交际行为的句子之间的语义连贯，确切地体现作者的思想。笔者探讨了英语事序的内涵、结构要素和属性，研究了事序表达的基本方法，并归纳了事序的五个基本特点。     

方阵A的伴随矩阵A*的性质

本文讨论了n阶方阵A的伴随矩阵的性质.     

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。     

一类广义Liénard型方程的极限环

本文讨论广义Lienard系统(E):x+(f(x)+k(x)x)+g(x)=0,获得了系统(E)的极限环存在,至多有一个或两个的充分条件.这些条件不仅简单和易于验证,而且推广了〔5,6〕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.     

新疆西准地区古生界火山岩岩石特征及其与金矿化的关系

新疆西准噶尔地区三个构造层各有其相应的火山建造:前泥盆系为基底构造层,细碧角斑岩建造位于该层加里东期俯冲碰撞型蛇绿杂岩带内.中晚泥盆系至早石炭系为弧后盆地构造层,西区火山岩为张裂早期形成的钙碱性岛弧火山岩,安齐火山岩带石炭系火山岩为亚碱性低钾拉斑玄武岩.晚石炭——二叠系为陆相火山——磨拉石沉积构造层,其中的火山岩以壳源的流纹岩为主,含少量碱性大陆玄武岩.石炭系太勒古拉组玄武岩是西准最重要的矿源层,哈图金矿即位于该层的破火山口中,为火山晚期热液成因.     

<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.     

基于个人信用卡消费分析的客户分类指标研究

随着信用卡业务的蓬勃发展,信用风险成为金融风险的一项重要内容。在加强事后监控进行风险监控的理念下,基于个人信用卡消费分析建立了若干指标,可用于对持卡人的信用进行分类和授信控制。     

一对称矩阵方程组解的研究

给出了四元数体上一对称矩阵方程组有斜埃尔米特解的充分必要条件,并得到了此方程组的斜埃尔米特解的一般表达式。应用主要结果讨论了四元数矩阵A和B矩阵有共同的斜埃尔米特广义逆的充要条件及斜埃尔米特广义逆的表示。