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51.
Andrey V. Savkin 《Systems & Control Letters》1998,33(5):281-289
This paper considers the problem of simultaneous H∞ control of a finite collection of linear time-invariant systems via a nonlinear digital output feedback controller. The main result is given in terms of the existence of suitable solutions to Riccati algebraic equations and a dynamic programming equation. Our main result shows that if the simultaneous H∞ control problem for k linear time-invariant plants of orders n1,n2,…,nk can be solved, then this problem can be solved via a nonlinear time-invariant controller of order nn1+n2++nk. 相似文献
52.
Nikolaev AG Oks EM Savkin KP Yushkov GY Brown IG 《The Review of scientific instruments》2012,83(2):02A501
Vacuum arc ion sources have been made and used by a large number of research groups around the world over the past twenty years. The first generation of vacuum arc ion sources (dubbed "Mevva," for metal vapor vacuum arc) was developed at Lawrence Berkeley National Laboratory in the 1980s. This paper considers the design, performance parameters, and some applications of a new modified version of this kind of source which we have called Mevva-V.Ru. The source produces broad beams of metal ions at an extraction voltage of up to 60 kV and a time-averaged ion beam current in the milliampere range. Here, we describe the Mevva-V.Ru vacuum arc ion source that we have developed at Tomsk and summarize its beam characteristics along with some of the applications to which we have put it. We also describe the source performance using compound cathodes. 相似文献
53.
This paper presents measurements of the angular distribution of the plasma components and different charge states of metal ions generated by a MEVVA-type ion source and measured by a time-of-flight mass-spectrometer. The experiments were performed for different cathode materials (Al, Cu, and Ti) and for different parameters of the vacuum arc discharge. The results are compared with prior results reported by other authors. The influence of different discharge parameters on the angular distribution in a vacuum arc source is discussed. 相似文献
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A. V. Krokhalev O. A. Avdeyuk K. V. Prikhod’kov A. N. Savkin S. V. Kuz’min V. I. Lysak 《Russian Engineering Research》2014,34(2):85-88
Attention focuses on the application of powder coatings and the shaping of hard alloys from powder mixtures (chromium carbide + metals) in explosive machining. The loading conditions are investigated as a function of the properties of the metal binder, as well as its structure, hardness, and antifrictional behavior. 相似文献
57.
Long‐term expansion of human induced pluripotent stem cells in a microcarrier‐based dynamic system 下载免费PDF全文
58.
A. L. Vorontsov N. M. Sultan-Zade A. Yu. Albagachiev A. I. Savkin 《Russian Engineering Research》2010,30(12):1241-1247
The problem is formulated, and the basic mathematical equations required to construct a theory of thermal cutting processes
are outlined. 相似文献
59.
AV Kabashin Ph Delaporte A Pereira D Grojo R Torres Th Sarnet M Sentis 《Nanoscale research letters》2010,5(3):454-463
An overview of pulsed laser-assisted methods for nanofabrication, which are currently developed in our Institute (LP3), is
presented. The methods compass a variety of possibilities for material nanostructuring offered by laser–matter interactions
and imply either the nanostructuring of the laser-illuminated surface itself, as in cases of direct laser ablation or laser
plasma-assisted treatment of semiconductors to form light-absorbing and light-emitting nano-architectures, as well as periodic
nanoarrays, or laser-assisted production of nanoclusters and their controlled growth in gaseous or liquid medium to form nanostructured
films or colloidal nanoparticles. Nanomaterials synthesized by laser-assisted methods have a variety of unique properties,
not reproducible by any other route, and are of importance for photovoltaics, optoelectronics, biological sensing, imaging
and therapeutics. 相似文献
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