1,037 research outputs found
The SVM Classifier Based on the Modified Particle Swarm Optimization
The problem of development of the SVM classifier based on the modified
particle swarm optimization has been considered. This algorithm carries out the
simultaneous search of the kernel function type, values of the kernel function
parameters and value of the regularization parameter for the SVM classifier.
Such SVM classifier provides the high quality of data classification. The idea
of particles' {\guillemotleft}regeneration{\guillemotright} is put on the basis
of the modified particle swarm optimization algorithm. At the realization of
this idea, some particles change their kernel function type to the one which
corresponds to the particle with the best value of the classification accuracy.
The offered particle swarm optimization algorithm allows reducing the time
expenditures for development of the SVM classifier. The results of experimental
studies confirm the efficiency of this algorithm.Comment: 9 page
Konus-Wind and Helicon-Coronas-F Observations of Solar Flares
Results of solar flare observations obtained in the Konus-Wind experiment
from November, 1994 to December, 2013 and in the Helicon Coronas-F experiment
during its operation from 2001 to 2005, are presented. For the periods
indicated Konus-Wind detected in the trigger mode 834 solar flares, and
Helicon-Coronas-F detected more than 300 solar flares.
A description of the instruments and data processing techniques are given. As
an example, the analysis of the spectral evolution of the flares
SOL2012-11-08T02:19 (M 1.7) and SOL2002-03-10T01:34 (C5.1) is made with the
Konus-Wind data and the flare SOL2003-10-26T06:11 (X1.2) is analyzed in the
2.223 MeV deuterium line with the Helicon-Coronas-F data.Comment: Published version. A list of the Konus-Wind solar flare triggers and
figures of their time profiles are available at
http://www.ioffe.ru/LEA/Solar
Algorithmic approach based on logical qualifiers of subcontractors during creation of large machine-building complexes
The currently stepped price competition stage, in other words, the quality of competition is defined by whether the quality of engineering products depends both on the assembly and on those parts of the product, which is going. The suggested information-analytical tender system, including remote maintenance, connects with the help of web technologies the enterprise financial structure of the workstations operators and authorized persons of contractors located in different geographical areas of the world to form an effective infrastructure for the production, including the incorporation of Russian and foreign small and medium-sized businesses in the technological chain of transnational corporations
Psychological and pedagogical support for the social workers professional development
The effectiveness of psychological andpedagogical support is determined by the following factors: self-determination and voluntary participation; activating education results; taking into account and developing social workers’ educational needs; the use of the dichotomic and humanistic approaches; social workers’ selfdetermination; interactive mode of cooperation, democratic style of communicatio
Topological energy barrier for skyrmion lattice formation in MnSi
We report the direct measurement of the topological skyrmion energy barrier
through a hysteresis of the skyrmion lattice in the chiral magnet MnSi.
Measurements were made using small-angle neutron scattering with a custom-built
resistive coil to allow for high-precision minor hysteresis loops. The
experimental data was analyzed using an adapted Preisach model to quantify the
energy barrier for skyrmion formation and corroborated by the minimum-energy
path analysis based on atomistic spin simulations. We reveal that the skyrmion
lattice in MnSi forms from the conical phase progressively in small domains,
each of which consisting of hundreds of skyrmions, and with an activation
barrier of several eV.Comment: Final accepted versio
The accumulation of proteins with chitinase activity in the culture media of the parent and mutant Serratia marcescens strain grown in the presence of mitomycin C | Dinamika nakopleniia belkov s khitinaznoi aktivnost'iu v kul'tural'noi zhidkosti mutantnogo shtamma i iskhodnogo shtamma Serratia marcescens v prisutstvii mitomitsina C.
The study of the accumulation pattern of extracellular proteins with chitinase activity in the parent Serratia marcescens strain Bú 211 (ATCC 9986) grown in the presence of mitomycin C and its mutant strain with the constitutive synthesis of chitinases grown in the absence of the inducer showed that chitinase activity appeared in the culture liquids of both strains at the end of the exponential phase (4 h of growth) and reached a maximum in the stationary phase (18-20 h of growth). The analysis of the culture liquids (12 h of growth) by denaturing electrophoresis in PAAG followed by the protein renaturation step revealed the presence of four extracellular proteins with chitinase activity and molecular masses of 21, 38, 52, and 58 kDa
Biosynthesis of endochitinase of Serratia marcescens
The growth of a mutant strain of Serratia marcescens with high chitinase activity and the biosynthesis of endochitinase by this strain were investigated. The study was carried out using semisynthetic culture medium without inducers and culture medium containing colloidal chitin as a sole nitrogen and carbon source, with and without mitomycin C. The mutant strain, unlike the native one, was shown to produce endochitinase and to secrete the enzyme into the medium during the growth on culture medium without the inducers, chitin and mitomycin C. During growth on the medium with chitin the mutant strain differed from the native one with a short lag-phase of growth, the early appearance of endochitinase in the culture liquid and a high level of endochitinase activity. The difference between the strains disappeared after the addition of mitomycin C, an inducer of the cell SOS-response, to the culture medium containing chitin. Specific endochitinase activity of S. marcescens mutant strain grown on various culture media had two maxima, namely at the beginning and at the end of the stationary phase. Mitomycin C increased the specific activity in a second peak of endochitinase activity during the growth of the mutant strain
Role of photochemical and microbial degradation of phenol in water
The present work is aimed at spectroscopic and luminescent investigations of the microbial
cleavage efficiency of phenol in the water solution upon expose to UV light. With increasing time of irradiation
of phenol in the saline solution,the absorption intensity increases throughout the spectrum. The efficiency
of photoalteration of phenol in the saline solution is higher compared to that in water. The results obtained
have shown that the efficiency of complex photobiological phenol destruction increases sharply compared
to the photochemical or microbial destruction
時系列解析による感染症流行の長期趨勢および周期特性 ; 第1報
The growth of a mutant strain of Serratia marcescens with high chitinase activity and the biosynthesis of endochitinase by this strain were investigated. The study was carried out using semisynthetic culture medium without inducers and culture medium containing colloidal chitin as a sole nitrogen and carbon source, with and without mitomycin C. The mutant strain, unlike the native one, was shown to produce endochitinase and to secrete the enzyme into the medium during the growth on culture medium without the inducers, chitin and mitomycin C. During growth on the medium with chitin the mutant strain differed from the native one with a short lag-phase of growth, the early appearance of endochitinase in the culture liquid and a high level of endochitinase activity. The difference between the strains disappeared after the addition of mitomycin C, an inducer of the cell SOS-response, to the culture medium containing chitin. Specific endochitinase activity of S. marcescens mutant strain grown on various culture media had two maxima, namely at the beginning and at the end of the stationary phase. Mitomycin C increased the specific activity in a second peak of endochitinase activity during the growth of the mutant strain
The accumulation of proteins with chitinase activity in the culture liquids of the parent and mutant Serratia marcescens strains grown in the presence of mitomycin C
The study of the accumulation pattern of extracellular proteins with chitinase activity in the parent Serratia marcescens strain Bú 211 (ATCC 9986) grown in the presence of mitomycin C and its mutant strain with the constitutive synthesis of chitinases grown in the absence of the inducer showed that chitinase activity appeared in the culture liquids of both strains at the end of the exponential phase (4 h of growth) and reached a maximum in the stationary phase (18-20 h of growth). The analysis of the culture liquids (12 h of growth) by denaturing electrophoresis in PAAG followed by the protein renaturation step revealed the presence of four extracellular proteins with chitinase activity and molecular masses of 21, 38, 52, and 58 kDa. © 2002 MAIK "Nauka/Interperiodica"
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