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B Salimbahrami B Lohmann T Bechtold JG Korvink 《Mathematical and Computer Modelling of Dynamical Systems: Methods, Tools and Applications in Engineering and Related Sciences》2013,19(1):79-93
In this paper we introduce a two-sided Arnoldi method for the reduction of high order linear systems and we propose useful extensions, first of all a stopping criterion to find a suitable order for the reduced model and secondly, a selection procedure to significantly improve the performance in the multi-input multi-output (MIMO) case. One application is in micro-electro-mechanical systems (MEMS). We consider a thermo-electric micro thruster model, and a comparison between the commonly used Arnoldi algorithm and the two-sided Arnoldi is performed. 相似文献
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The acid-base and complexing properties of a naturally occurring antibiotic ionophore-monensin (MonH)-were studied in anhydrous methanol solutions primarily by potentiometric measurements. The pK
a of the acid was found to be 10.30±0.05 at 25°C. Complexes of silver, thallium, and alkali ions with the undissociated ligand were also studied, and their stability constants were determined. The acid dissociation constant of MonH as well as the stability constants of Mon– Na+ and MonH·NaClO4 complexes were determined in the 5–45°C temperature range, and the enthalpy and entropy of the acidity and stability constants were determined from van't Hoff's plots. The formation of MonH and Mon–Na+ species are both enthalpy and entropy stabilized, but the formation of the MonH·NaClO4 complex is enthalpy stabilized but entropy destabilized. 相似文献
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Reversed-phase high-performance liquid chromatography peptide mapping of bovine somatotropin 总被引:1,自引:0,他引:1
P A Hartman J D Stodola G C Harbour J G Hoogerheide 《Journal of chromatography. A》1986,360(2):385-395
Reversed-phase high-performance liquid chromatography peptide mapping techniques have been used to examine the primary structure of bovine somatotropin (bSt) isolated from Escherichia coli modified by recombinant DNA techniques (rbSt) and from bovine pituitary (pbSt). Peptide fragments arising from tryptic digestion of bSt were separated on Baker wide pore C4 or C8 columns with linear gradients (acetonitrile-water with 0.1% trifluoroacetic acid). Major peaks eluted in a consistent order, but significant day-to-day variation in retention times was observed. Isolated peptide fragments were analyzed via acid hydrolysis followed by formation and separation of the phenylthiocarbamyl amino acids. These correspond to expected tryptic fragments. 相似文献
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Munshi G Mustafa Sudhir Raniwala T Awes B Rai RS Bhalerao JG Contreras RV Gavai SK Ghosh P Jaikumar GC Mishra AP Mishra H Mishra B Mohanty J Nayak J-Y Ollitrault SC Phatak L Ramello R Ray PK Sahu AM Srivastava DK Srivastava VK Tiwari 《Pramana》2006,67(5):961-981
This is the report of Heavy Ion Physics and Quark-Gluon Plasma at WHEPP-09 which was part of Working Group-4. Discussion and
work on some aspects of quark-gluon plasma believed to have created in heavy-ion collisions and in early Universe are reported. 相似文献
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We demonstrate the formation of nanoscale volcano-like structures induced by ion-beam irradiation of nanoscale pores in freestanding silicon nitride membranes. Accreted matter is delivered to the volcanoes from micrometer distances along the surface. Volcano formation accompanies nanopore shrinking and depends on geometrical factors and the presence of a conducting layer on the membrane's back surface. We argue that surface electric fields play an important role in accounting for the experimental observations. 相似文献
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本文对目前广泛应用于结构非线性分析之中的弧长法进行改进。改进后的弧长法除保持原有优点外,能够在自动跟踪结构非线性平衡路径的同时,进一步求得位于结构平衡睡径任一区段的任意预先指定的荷载水平及相应的变形。本文的方法可以推广应用于求解预先指定的应力或位移。数值算例表明了本文方法的计算精度、效率及可靠性。 相似文献