用MUX实现组合逻辑的卡诺图列解法

本文采用卡诺图列解法来处理MUX组件的地址变量少于待发生逻辑函数变量的设计问题。方法简单易行、适用范围广。尤其是对于含有任意项的逻辑函数中任意项的处理,提供了寻找最佳方案的途径。     

基因工程菌株EscherichiacoliC600（pRLK14）的流加培养

在１Ｌ搅拌发酵罐中对含有重组质粒ｐＲＬＫ１４的大肠杆菌进行了培养。结果表明，采用二段培养法，于３４℃增殖细菌，在对数增殖后期升温到４２℃进行诱导，可以高效表达基因产品半乳糖激酶。诱导期，醋酸浓度增长较快，模拟实验表明，控制醋酸浓度可进一步提高半乳糖缴酶产率。     

论地理信息系统的发展机理与发展趋势

从地理信息系统（ＧＩＳ）的发展渊源出发，总结了地理信息系统发展的４个阶段：６０年代起步阶段；７０年代发展阶段；８０年代应用阶段；９０年代成熟阶段．提出了地理信息系统的４个发展趋势：体系结构日臻完善；向多用途综合化方向发展；向智能型辅助决策方向发展；向实用型产业化方向发展     

点态化Fuzzy域及其性质

本文从点的角度重新定义了Ｆｕｚｚｙ域，并讨论了它的一些性质。     

带有Ornstein-Uhlenbeck 过程的随机logistic种群模型

研究带有均值回复Ornstein-Uhlenbeck过程的随机logistic种群模型的动力学行为。证明收获努力E＊可以控制随机微分方程模型的随机灭绝和持续:若E≥E＊并且满足一些其他条件,则种群灭绝;若E     

对“有机化合物命名”中存在问题的商榷

按照《有机化学命名原则》（１９８０）,对目前高校有机化学教材中化合物命名中存在的问题进行了讨论。     

The neodymium isotopic characteristic and geological significance of Kuokesu plagioclase amphibolites from the Kuruktag, Xinjiang, China

The plagioclase amphibolites from Kuokesu area, Kuruktag, Xinjiang occur as enclaves embedded in the granodioritic gneiss. In the light of major elements and REE data, the parent rocks of the plagioclase amphibolites belong to weak_alkaline basalts. Their Nd model ages mainly range from 2 832 to 3 075 Ma. The seven plagioclase amphibolites yield a reasonable good isochron age of (828±86) Ma(2σ) with I Nd =0.510 981±82, ε Nd ( t )=-11.5±1.6. Such a case shows the existence of great proportion of the Archaean mafic crustal basement on the Kuokesu area. The strong tectonic_thermal event at about 820 Ma made the Sm_Nd isotope of the metamorphic rocks homogenization. This event would be associated with the Tarim Movement.     

一类不确定性决策问题的变权分析方法

以灰色系统理论和模糊数学为基础,探讨了多属性决策问题中所包含的不确定性可以用灰色模糊数表示的情况,提出了基于灰色模糊信息的多属性决策的概念.利用分析方法和技巧,融合变权和熵权误差分析法,构建了灰色模糊多属性决策问题的算法,直接由灰色模糊决策矩阵确定变权的基础权重和上确界,使算法在理论上更加严谨可靠,为不确定型多属性决策方法研究提供了一条新思路.给出的算例说明了算法的可行性.     

具有混合策略的二人有限零和灰色博弈

基于灰色系统理论的思想和方法，探讨了具有混合策略的二人有限零和博弈问题．提出了具有混合策略的二人有限零和灰色博弈的概念．以及相应的平衡解、上、下临界平衡解、理想平衡解、口定位平衡解、均值定位平衡解等概念．证明了具有混合策略的二人有限零和灰色博弈问题平衡解的存在性．并且推证过程也提供了求解上、下临界平衡解、口定位平衡解和均值定位平衡解的方法．指出了灰色博弈问题的最优值与其上、下临界博弈问题最优值之间的关系．以及理想平衡解存在的一个充分条件．中的实例说明了有关概念及结论的合理性与求解方法的有效性。     

Nd isotopic characteristics of Proterozoic metasedimentary rocks and constraints on their provenance in the eastern segment of Central Tianshan Belt, Xinjiang

Sm-Nd isotopic characteristics, εNd(t) values and Nd model ages (TDM) of Proterozoic metasedimentary rocks in the eastern segment of Central Tianshan Belt (ESCTB), Xinjiang, are used to constrain the sedimentary provenance as well as to evaluate their tectonic implications. εNd(t) and TDM values of these samples range from -4.00 to +6.36 and from 1.29 to 2.29 Ga, respectively. These feature values are distinguished from those of Archean Tarim Craton. Their average εNd(t) values of the Weiya, the Kumishi and the south to the Dikar samples are -2.46, +2.06 and +1.37, respectively. Nd model ages of the Weiya samples vary between 1.86 and 2.29 Ga, but those of the Kumishi and the south to the Dikar samples show a significant concentration at 1.6～1.9 Ga and the youngest Nd model age is 1.29 Ga. Those Nd isotopic characteristics suggest that these metasedimentary rocks could be derived from a significant proportion of Paleoproterozoic crustal source and a participation of young arc materials, rather than Archean Tarim Craton. Furthermore, the data also indicate that these two sources were paleogeographically separated. Thus we can deduce that the Kumishi and the south to the Dikar metasedimentary rocks were formed proximal to the arc side of the back-arc basin, but the Weiya metasedimentary rocks were closer to the continental side of the back-arc basin.