抗癌药物L-天冬酰胺酶摇瓶发酵研究

对大肠杆菌 Ｌ－ 天冬酰胺酶的摇瓶发酵进行了研究。在最适条件下发酵 １２ｈ，可使产酶达到６０ｕ／ｍ ｌ。在培养基中添加 ００１％ 硫酸亚铁和 ２％ 的 Ｗ 试剂可分别提高产酶能力 １５％ 和２８％ 。该发酵过程是一个耗氧很大的过程。     

垂柳(Salix babylonica L.)雌雄植株的早期鉴别

用聚丙烯酰胺凝胶电泳法对已经开花的垂柳植株和经扦插由营养枝转变为幼苗状态的不同性别植株进行了过氧化物酶同工酶的测定,发现在每月份内成年雄株的过氧化物酶同工酶带均多于雌株,而幼苗状态的植株在该种的开花季节同工酶谱带的状况与成年株相似,雄株明显多于雌株,在其余月份里差别不显著,只在A区内,雄株有一条活性很弱的酶带,而雌株中缺失。实验表明过氧化物酶同工酶可以作为鉴别垂柳苗木雌雄性别的生化指标,但在该种的开花季节内较明显。     

Searching for Strange Attractor in Sliver Irregularity Series

The chaotic nonlinear time series method isapplied to analyze the sliver irregularity in textileprocessing. Because it unifies the system's determinacy andrandonmess, it seems more adaptive to describe the sliverirregularity than conventional methods. Firstly, the chaoscharacter, i. e. fractal dimension, positive Lyapunovexponent, and state space parameters, including time delayand reconstruction dimension, are calculated respectively.As a result, a positive Lyapunov exponent and a fractaldimension are obtained, which demonstrates that the systemis chaotic in fact. Secondly, both local linear forecast andglobal forecast models based on the reconstructed state areadopted to predict a segment part of the sliver irregularityseries, which proves the validity of this analysis.Therefore, the sliver irregularity series shows the evidenceof chaotic phenomena, and thus laying the theoreticalfoundation for analyzing and modeling the sliver irregularityseries by applying the chaos theory, and providing a newway to understand the complexity of the sliver irregularitymuch better.     

Distinction of influenza viruses of different host cell origin

Summary Influenza A viruses grown in different animal or human cells retain their antigenic make-up as tested by the usual immunological assays. With the aid of aSambucus nigra (L.) extract containing its lectins the viruses can be distinguished after one single passage in a different cell type by a change in their hemagglutinating properties. Binding of such lectins to influenza viruses may be a means for a more subtle classification, relating to the host cell origin of the virus.     

检疫性有害生物菟丝子的形态比较研究

本文通过对检疫性有害生物菟丝子种子的形态特征的研究，为口岸制检疫性杂草菟丝子的实验室检疫鉴定方法，提高检出率，防止其传人、传播、扩散，为口岸快速、准确的检疫鉴定提供资料依据。     

时滞非线性系统的耗散哈密顿实现和L2干扰抑制

研究时滞非线性系统的耗散哈密顿实现以及时滞哈密顿系统的L2干扰抑制问题．首先考虑了非线性系统的常值实现，提出了几个结论．然后针对时滞哈密顿系统提出了L2增益问题，并扩展了拉萨尔不变集原理．最后讨论了受控时滞哈密顿系统的L2干扰抑制控制问题．基于零状态可观性和所获得的拉萨尔不变集原理，提出了系统渐近稳定的充分条件．     

Lω-空间中的ωδ-Lindelff性质

在Lω-空间中引入ωδ-Lindelǒff性质和弱ωδ-Lindelǒff性质的概念，证明了ωδ-Lindelǒff性质和弱ωδ-Lindelǒff性质是ωδ-闭遗传的，并且在（ω1,ω2）δ-同胚映射下，它们是弱拓扑不变性质。     

316L不锈钢表面自身纳米化疲劳性能研究

文章分析研究了表面纳米层的微观组织结构特征,并对试件进行了疲劳试验,分析结果后,简述了表面自身纳米化对材料疲劳性能的影响。     

Robust exponential smoothing

The paper is devoted to robust modifications of exponential smoothing for time series with outliers or long-tailed distributions. Classical exponential smoothing applied to such time series is sensitive to the presence of outliers or long-tailed distributions and may give inadequate smoothing and forecasting results. First, simple and double exponential smoothing in the L₁ norm (i.e. based on the least absolute deviations) are discussed in detail. Then, general exponential smoothing is made robust, replacing the least squares approach by M-estimation in such a way that the recursive character of the final formulas is preserved. The paper gives simple algorithmic procedures which preserve advantageous features of classical exponential smoothing and, in addition, which are less sensitive to outliers. Robust versions are compared numerically with classical ones.     

稀土拌种处理对胡麻生长及产量的影响

探索了稀土拌种处理对胡麻生长和产量的影响,实验证明:稀土能明显提高胡麻种子的发芽指数,促进侧根的形成,增加根冠比值,使折合亩产提高4.6%,稀土拌种处理的最佳剂量为10～10mg.g~(-1)。