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ZverovichIE ZverovichOI 《高校应用数学学报(英文版)》2004,19(2):125-132
Two new hereditary classes of P5-free graphs where the stability number can be found in polynomial time are proposed. They generalize several known results. 相似文献
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循环流化床气固曳力模型 总被引:1,自引:0,他引:1
气固曳力是稠密气固两相流动,尤其是垂直流动中的主要作用力,相应的模型也是数值模拟中准确描述气固两相运动的关键.为了解决现有经验或半经验模型的普适性问题,合理描述流动中经常发生的颗粒团聚现象及其对气固曳力的影响,从理论分析入手,运用最小能量的概念,将传统的CFD方法与宏观的系统分析方法相结合,建立了一个新的计及颗粒团聚效应的气固曳力理论模型.与现有模型相比,新模型不仅具有相同的函数变化关系,可合理地描述气固两相相互作用的物理过程,而且避免了以往经验系数不准确导致的各种误差,为稠密气固两相流动的数值描述提供了重要依据. 相似文献
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Sergii A. Trofymchuk Andrij O. Tolmachov Kostàntyn M. Kondratyuk Yulian M. Volovenko Pavlo S. Lebed Mykhaylo V. Vovk 《合成通讯》2013,43(12):1984-1989
β-Chlorocinnamonitriles react with methylene-active compounds containing N-substituted carboxamide group in DMSO solution in the presence of potassium hydroxide, forming 3-functionally substituted 1,2-dihydropyridin-2-ones. 相似文献
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Volkova KD Kovalska VB Losytskyy MY Fal KO Derevyanko NO Slominskii YL Tolmachov OI Yarmoluk SM 《Journal of fluorescence》2011,21(2):775-784
In present paper series of trimethine cyanines modified in 5,5′- or 6,6′- position with hydroxy- or methoxy- substituents
is studied for their ability to interact selectively with fibrillar formations. Processes of dye aggregation that accompany
this interaction were also investigated. Meso-methyl trimethynecyanines with 5,5′- methoxy (7519) and hydroxy (7515) substituents
strongly (up to 40 times) increase fluorescence intensity in the presence of fibrillar insulin, and also give noticeable fluorescent
response on the presence of various aggregated proteins (lysozyme, β-lactoglobulin, α-synuclein A53T). 7519 and 7515 dyes
can be used for fluorometric detection of fibrillar insulin at concentrations of approximately 1.5–120 microg/ml. For meso-ethyl
substituted dye 7514 the ability to form H- and J-aggregates upon interaction with insulin fibrils was suggested. The model
of the H- and J-aggregate packing in the protein fibrillar structure has been proposed. 相似文献
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