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I. D. Kashcheev S. N. Sychev M. N. Dunaeva L. A. Karpets P. A. Emel’yanov O. S. Ryakhova 《Refractories and Industrial Ceramics》2008,49(2):131-134
Compositions have been developed for nonshrinking vibrocast thermally insulating light refractory concretes with densities
of 1.0, 1.3, 1.5, and 1.8 g/cm3 for temperatures of use up to 1400°C. The structure and properties have been examined for the concrete of density 1.3 g/cm3.
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Translated from Novye Ogneupory, No. 4, pp. 29–32, April, 2008. 相似文献
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Reset controllers are linear controllers that reset some of their states to zero when their input is zero. We are interested in their feedback connection with linear plants, and in this paper we establish fundamental closed-loop properties including stability and asymptotic tracking. This paper considers more general reset structures than previously considered, allowing for higher-order controllers and partial-state resetting. It gives a testable necessary and sufficient condition for quadratic stability and links it to both uniform bounded-input bounded-state stability and steady-state performance. Unlike previous related research, which includes the study of impulsive differential equations, our stability results require no assumptions on the evolution of reset times. 相似文献
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Orhan Gazi A. Ozgur Yilmaz 《Communications Letters, IEEE》2007,11(2):173-175
Decoding delay is an important consideration for the use of turbo codes in practical applications. We propose a new structure for turbo codes which is very suitable for parallel decoding. It is shown by union bound analysis and simulation results that the proposed system performance is comparable to that of the classical turbo codes 相似文献
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The influence of the chemical reactions occurring in the gas phase of a gas suspension flowing in a channel with penetrable
walls and the combustion of the condensed-impurity particles in this flow on its gasdynamic structure has been investigated.
It is shown that the order of the system of equations defining a flow of a chemically reactive gas suspension with a homogeneous
exothermic reaction proceeding at a definite rate and a heterogeneous combustion of the condensed-phase particles can be decreased
if certain assumptions are mode. The distributions of the parameters of the gas and dispersed phases were calculated as functions
of the rate of blow and the sizes of the particles.
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Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 80, No. 4, pp. 91–98, July–August, 2007. 相似文献
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Results are provided for an experimental study of forming trajectories during drilling and the effect on them of cutting speed
and drilling depth.
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Translated from Izmeritel’naya Tekhnika, No. 8, pp. 31–33, August, 2006. 相似文献
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The quality of coke has a strong effect on the performance indices of a blast furnace. For a furnace to operate with high productivity and a low coke rate, it is necessary to use coke with high strength characteristics. The Novolipetsk Metallurgical Combine has conducted studies of the effect of coke quality on the operation of blast furnaces of different sizes. The quality of the coke was evaluated on the basis of the following indices: CSR, CRL, the cold-strength indices M10 and M25, and the integral coke-quality index Ig.c used by the Sidmar company. Furnace productivity, coke rate, and the totterman index (DMI) were also used for the sake of comparison. 相似文献