用气相色谱最佳分离条件的特征值rt0／β确定GC／MS的操作条件

作者从理论和实践上证明了在检测器、载气及色谱柱参数不同的条件下，通过改变死时间ｔ０和升温速率ｒ，保持特征值ｒｔ０／β不变，能达到气相色谱图与气质联用仪总离子科一致的。     

连续范畴

将定向完备偏序集上的way-below关系推广到任意小范畴上,从而在任意小范畴上引入了连续性.并进一步讨论了连续范畴的性质,证明了连续范畴有许多类似于连续偏序集的好的性质.     

论陈寅恪的文学研究方法

探索了陈寅恪的文学研究方法,认为可分为四种:诗史互证、多重证据法、科学思维法、从文化的视野视察文学,并对此分别加以阐述。     

Analysis of viscose fiber for spinning process principles

粘胶纤维是一种广泛应用的化纤产品,它具有与棉一样好的吸湿性和染色性,其纺织品色彩鲜艳、光泽如丝.文章结合作者在工作中的体会,对粘胶连续纺丝的工艺原理进行简要的分析.     

Identification and gene mapping of a narrow and upper-albino leaf mutant in rice (Oryza sativa L.)

The leaf blade consists of color and shape traits. Studies of leaf-blade development are important for improvement of rice yield and quality because it is an essential organ for photosynthesis. A narrow and upper-albino leaf mutant (nul1) was identified from among progeny of the indica restorer line Jinhui10 raised from seeds treated with ethyl methane sulfonate. Under field conditions, the mutant displayed narrow and upper-albino leaf blades with significantly decreased photosynthetic pigment contents throughout their development. The narrow-leaf trait is caused by a decreased number of small veins. In contrast to the wild type, the growth period was extended by approximately 8 d and agronomic traits, such as effective panicle number, percentage seed set and 1000-grain weight, declined significantly in the nul1 mutant. Genetic analysis suggested that the narrow and upper-albino leaf characteristics showed coseparation and were controlled by one recessive gene. The Nul1 gene was mapped onto chromosome 7 between the Indel marker Ind07-1 and the Simple Sequence Repeat marker RM21637. The physical distance between the markers was 75 kb and eight genes were annotated in this region based on the rice Nipponbare genome sequence. These results provide a foundation for cloning and function analysis of Nul1.     

基于人工神经网络BP算法的可编程控制器的设计与应用

本文介绍了一种基于人工神经网络ＢＰ算法的可编程控制器的设计法，此种方法可用于对复杂的工业生产过程量进行控制。     

三阶张弛振子的临界行为

本文报道最简单三阶张弛振子的实验电路、映象描述,及对其从准周期向混沌过渡的临界行为的实验研究,并说明了这些临界行为的普遍意义。我们测得沿临界线准周期集的分数维为:D=0.88±0.01;以及当绕数逼近黄金分割比时,映象参数的收敛比平均值为:■-2.85±0.1。这些结果与圆映象理论很好地符合,从而对Cumming等人得出的D=0.795±0.005及δ_n 的值在-3.3±0.1与-2.7±0.2之间的结论作了较圆满的解释。     

最大需量问题处理中的算法研究

本文给出了处理最大需量问题的算法1和算法2，讨论了算法2的数据结构。     

一类线性不等式组的代数特征解法

按本文的方法，由ｎ×（ｎ＋１）阶欠线性方程组Ａ＾ＴＹ＝０的一个非零解，便能确定线性不等式组ＡＸ≤ｂ之解集合有哪些顶点和棱，以及这些顶点和棱是哪些ｎ×ｎ阶线性方程组的解，从而求得解集合。