SDS—1型教学用程控交换系统的开发与研制

作者在文中介绍重庆邮电学院开发研制的ＳＤＳ－１型教学用程控交换系统，阐述了该系统的组成结构，各个功能的实现方法，灵活的体系结构及其突出的新特点，它应用于程控教学与实验，提高了教学效果和实验水平。     

非线性映象零点定理的推广

本文引入一类次单调映象，给出了这类映象方程的一个零点定理     

杜氏藻同步化生长及核型分析

经１２ｈ光照和１２ｈ黑暗的光周期诱导，杜氏藻（Ｄｕｎａｌｉｅｌａ）出现同步化生长．以０．０５％秋水仙素处理、低渗及高位（６０ｃｍ）滴片，获得４种杜氏藻的核型．它们都是单倍体．染色体大多呈圆点状，极小．最长的染色体约为１．６μｍ，最短的染色体仅约０．５μｍ．染色体数分别是：Ｄ．ｐａｒｖａ１６条，Ｄ．ｂｉｏｃｕｌａｔａ２２条，Ｄ．ｐｅｉｒｃｅｉ２６条和Ｄ．ｍｉｎｕｔａ２８条．只有Ｄ．ｐｅｉｒｃｅｉ的第１至第４号和第７号染色体可见较明显的中间缢痕     

对象关系数据库系统模型及映射规则

在业务逻辑层和关系数据库的物理存储结构中间增加一个O R代理层,提出了一个对象关系数据库系统的三层模型,并对系统模型的各个层次进行了详细的功能设计和分析;总结出了代理层O R映射的4条基本规则,并对各自的优缺点进行了比较.结果表明,该模型在实际应用中存在有效性.     

关于强增生型变分包含问题解的Mann型迭代法

研究P-一致光滑的实Banach空间（1〈P≤2）中一类强增生型变分包含问题解的Mann型迭代逼近问题．在仅假设强增生映象的连续性下，利用徐宗本教授等人（1991年）给出的对偶映象L的HSlder连续性，证明了具误差的Mann迭代法强收敛到这类变分包含的唯一解．     

双局扇双电源自动切换装置在煤矿安全生产中的应用

介绍了双局扇双电源自动切换装置在煤矿安全生产中的具体应用,阐述了实现局扇连续运转的根本途径,从而可以保证采掘工作面的安全生产。     

机载脉冲多普勒雷达回波信号模拟

回波信号作为雷达信号处理之源,它的模拟对研究雷达系统仿真具有非常重要的实际意义。在研究雷达回波特性的基础上,获得雷达回波信号的准确表达式,采用映象法将地面分成大杂波单元和小杂波单元,对各小杂波单元产生的回波采用矢量相加以求得相干视频信号,计算整个距离环的回波获得完整的雷达回波信号。最后的仿真结果证明了计算的正确性。     

Mapping of the rice （Oryza sativa L.） thermo-sensitive genic male sterile gene tms5 with EST and SSR markers

VELOPING“TWO-LINE”HYBRID RICE.THE POLLEN FERTILITY OF TGMS IS REGULATED BY THE TEMPERATURE OF ENVIRONMENT.THE POLLENS OF TGMS LINES ARE STERILE WHEN THE ENVI-RONMENT TEMPERATURE IS ABOVE A CRITICAL POINT,BUT FERTILE BELOW THIS POINT.SO FAR,A NUMBER OF T…     

Strategy for the mapping of interactive genes using bulked segregant analysis method and Mapmaker/Exp software

A qualitative trait is usually controlled by a single gene, but it may be sometimes controlled by two or even more genes. This phenomenon is called gene interaction. Rapidly searching for linked mo- lecular markers via bulked segregant analysis (BSA) and then constructing regional linkage map with Mapmaker/Exp has become a common approach to mapping single major genes. However, methods and computer programs developed for mapping single major genes cannot be simply applied to interactive genes because the genetic patterns of gene interac- tions are quite different from that of single-gene in- heritance. Up to now, experimental methods for quickly screening molecular markers linked to inter- active genes and statistical methods and corre- sponding computer softwares for simultaneously analyzing the linkage relationships of multiple mo- lecular markers to an interactive gene have not been available. To solve this problem, in this paper, we propose a strategy for mapping interactive genes using BSA and Mapmaker/Exp. We demonstrate that all interactive genes can be mapped by the 'BSA Mapmaker/Exp' strategy using F2 generation (in a few cases, F3 generation is also needed). As BSA and Mapmaker/Exp have been broadly used in gene mapping studies and are well known by many re- searchers, the strategies proposed in this paper will be useful for practical researches.     

Genetic analysis and molecular mapping of a presenescing leaf gene psll in rice （Oryza sativa L.）

A rice psl1 （presenescing leaf） mutant was obtained from a japonica variety Zhonghua 11 via radiation of ^60Co-γ in M2 generation. Every leaf of the mutant began to wither after it reached the biggest length, while the leaves of the wild variety could keep green for 25--35 d. In this study, genetic analysis and gene mapping were carried out for the mutant identified. The SSR marker analysis showed that the mutant was controlled by a single recessive gene （psl1） located on chromosome 2. Fine mapping of the psl1 locus was conducted with 34 new STS markers developed around psl1 anchored region based on the sequence diversity between Nipponbare and 93-11. The psl1 was further mapped between two STS markers, STS2-19 and STS2-26, with genetic distances of 0.43 and 0.11 cM, respectively, while cosegregated with STS2-25. A BAC contig was found to span the psl1 locus, the region being delimited to 48 kb. This result was very useful for cloning of the psl1 gene.