一类一级饱和反应系统的极限环

本文研究了一类具有常量输出的多分子一级饱和反应系统,得到极限环存在性和唯一性的条件,推广和改进了文[3]中结论。     

一泛函微分系统的稳定性和Hopf分支

本文给出了一3维泛函微分系统的平衡点的全时滞稳定的代数判据,并讨论给出了该系统存在Hopf分支的条件。     

沼泽红假单胞菌B.9菌株类胡萝卜素的组份及稳定性的研究

沼泽红假单胞菌Ｂ．９菌株类胡萝卜素粗制品通过薄层层析和柱层析分离纯化,各组份的吸收光谱表明,Ｂ．９菌株含有单甲基螺菌黄素和／或螺菌黄素、３,４－脱氢紫菌红素和／或脱水紫菌红醇和／或紫菌红醇、番茄红素和／或紫菌红素、四氢番茄红素等多种类胡萝卜素。黑暗、常温及Ｎａ＾＋对Ｂ．９菌株类胡萝卜素粗提液的稳定性影响较小。     

中立型泛函微分方程解的稳定性和有界性

本文讨论了具有无限时滞的中立型泛函微分方程解的稳定性和有界性,利 用Ｌｙａｐｕｎｏｖ泛函方法得到了相应的充分条件,一些近期文献中的结果得到了推广。     

武术旋风脚720°接跌叉稳定性的研究

武术旋风脚 72 0°接跌叉是九运会武术指定动作之一。通过对该组动作落地技术的动力学以及构成稳定性条件的分析 ,提出合理的落地技术和训练中需解决的问题。     

一类多分子反应模型的定性分析

文章对一类多分子反应模型进行了定性分析,证明了在第一象限内存在平衡点时系统是全局稳定的．     

自由基稳衡动态性与运动的关系

从自由基穗衡动态性这个全新的概念出发，介绍了科学的训练和机体自身及外源性抗氧化荆和营养因素之间相互影响和协调对机体的影响，讨论了它与运动之间的关系。     

DSP技术在图像火检中的应用

现代火焰检测系统对于火焰图像处理技术的实时性和系统的稳定性提出了更高的要求,在对检测方法进行优化的同时,对硬件设备的优化成为现在研究的重点。利用DSP技术作为图像火检的平台,通过串口实现与上位机数据进行传输,提高了检测处理的速度,检测过程不占用CPU资源,提高了炉膛火焰检测系统的实时性和稳定性。     

Measuring the impact of spammers on e-mail and Twitter networks

This paper investigates the research question if senders of large amounts of irrelevant or unsolicited information – commonly called “spammers” – distort the network structure of social networks. Two large social networks are analyzed, the first extracted from the Twitter discourse about a big telecommunication company, and the second obtained from three years of email communication of 200 managers working for a large multinational company. This work compares network robustness and the stability of centrality and interaction metrics, as well as the use of language, after removing spammers and the most and least connected nodes. The results show that spammers do not significantly alter the structure of the information-carrying network, for most of the social indicators. The authors additionally investigate the correlation between e-mail subject line and content by tracking language sentiment, emotionality, and complexity, addressing the cases where collecting email bodies is not permitted for privacy reasons. The findings extend the research about robustness and stability of social networks metrics, after the application of graph simplification strategies. The results have practical implication for network analysts and for those company managers who rely on network analytics (applied to company emails and social media data) to support their decision-making processes.