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971.
Ján Jakubík 《Mathematica Slovaca》2008,58(6):719-738
We use the concept of generalized MV-algebra (GMV-algebra, in short) in the sense of Galatos and Tsinakis; the main tool in their investigation was a truncation construction.
The relations between radical classes of GMV-algebras and radical classes of lattice ordered groups are investigated in the present paper. Further, we apply the truncation
construction for dealing with weak retract mappings of GMV-algebras.
This work has been partially supported by the Slovak Academy of Sciences via the project Center of Excellence — Physics of
Information (Grant I/2/2005). 相似文献
972.
Models of two important characterisation procedures for oil and oil fractions, ASTM D86 (ASTM = American Society for Testing
of Materials) and EFV (Equilibrium Flash Vaporization), were presented. The purpose was to provide a basis for the construction
of substitute mixtures of real components used in modelling and simulation of chemical engineering processes instead of original
complex mixtures. It was shown how to deal with a possible problem of higher index of differential-algebraic model of the
ASTM D86. A number of examples proved the adequacy of the presented models.
Presented at the 34th International Conference of the Slovak Society of Chemical Engineering, Tatranské Matliare, 21–25 May
2007. 相似文献
973.
Zoltán B. Szabó Mihály Herczeg Anikó Fekete Gyula Batta Anikó Borbás András Lipták Sándor Antus 《Tetrahedron: Asymmetry》2009,20(6-8):808-820
Three regioisomers of the linear pentasaccharide part of the Skp1 glycoprotein, found in Dictyostelium discoideum, were prepared in the form of (2-trimethylsilyl)ethyl glycosides by means of 2+3 block syntheses using the disaccharide donor at the non-reducing end, and three different trisaccharide acceptors at the reducing end. Fucosylation of (2-trimethylsilyl)ethyl 3,4,6-tri-O-benzyl-β-d-galactopyranosyl-(1→3)-4,6-O-benzylidene-2-deoxy-2-NPhth-β-d-glucopyranoside with different fucosyl donors carrying an O-(2-naphthyl)methyl ether as a temporary-protecting group at positions C2, C3 or C4 gave rise to the protected core trisaccharides. After selective removal of the (2-naphthyl)methyl group, the resulting acceptors were glycosylated with the α(1→6) linked digalactosyl donor to yield the respective three regioisomeric pentasaccharides. Transformation of the phthalimido moiety into an N-acetyl group, followed by catalytic hydrogenation of the reducible-protecting groups furnished the free target pentasaccharides, which should be able to assist during the elucidation of the exact structure of the natural pentasaccharide. 相似文献
974.
The interaction of sulfonated tetraphenylporphins H2 TPPS4(HCl)2 and in CuTPPS4 with poly-N-vinylpyrrolidone (PVP) is studied using small-angle neutron scattering, dynamic light scattering, visible spectrophotometry, and viscometry. It is shown that porphyrin molecules form complexes with PVP, thus charging the polymeric chain. 相似文献
975.
976.
T. Zemčík 《Hyperfine Interactions》1990,55(1-4):1099-1102
A systematic increase of the average hyperfine magnetic induction at57Fe measured at room temperature during interrupted isothermal annealing was found to be inherent to the irreversible relaxation
processes in the Fe−B based soft magnetic alloys at moderately elevated temperatures. Assuming superimposed asymptotic exponential
field vs. time dependences. several processes can be distinguished, their relaxation times determined and from the Arrhenius-like
log τ vs. 1/T plots average activation enthalpies estimated. Results on the Fe70Co10B20 and Fe85−x
Co
x
B15 (x=17, 19 and 21 at. % Co) amorphous ribbons between 100 and 200°C are compared and discussed in terms of possible stress relief,
free volume annihilation and short range ordering mechanisms. 相似文献
977.
The Conroy integration method is re-considered and new sets of parameters are provided which permit to use as much as 150 000 sample points for twelve-fold integrals. The method is applied to various functions important in theories of liquids and compared with the approach based on the spherical harmonic expansion where it is possible. 相似文献
978.
K. Kovařík I. Ďuran I. Boshakova R. Holyaka V. Erashok 《Czechoslovak Journal of Physics》2006,56(2):B104-B110
Hall sensors offer an attractive true non-inductive method of magnetic field measurements for fusion devices. However, there is only limited experience in using of these sensors in such demanding environment (high heat loads, radiation, and electromagnetic noise). Recently, a combined magnetic probe was developed for CASTOR tokamak, which contains 3 Hall sensors and 3 coils arranged to measure all three components of magnetic field approximately in a single point of space. The probe is compatible with in-vessel use well in confinement region of CASTOR. It is fully controlled by multi-functional electronic system that drives the Hall probes, amplifies their output signals, performs the A/D conversion and stores the measured data on PC. The bandwidth of the system is up to 200 kHz. Design of the system and its implementation on CASTOR is reviewed. Results obtained using this diagnostic on CASTOR tokamak is presented. Radial profile of the poloidal magnetic field is used to deduce radial profile of safety factor. 相似文献
979.
Surface analysis of ripple pattern on PS and PEN induced with ring‐shaped mask due to KrF laser treatment
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O. Neděla P. Slepička P. Sajdl M. Veselý V. Švorčík 《Surface and interface analysis : SIA》2017,49(1):25-33
The approach for ripple nanopattern construction on surface of two polymer substrates [polyethylene naphthalate (PEN) and polystyrene (PS)] exposed by a KrF pulse excimer UV laser through a contact lithographic mask with circular slit was proposed in this paper. Thin layer of gold was deposited on samples after the laser treatment. Changes in the morphology of the surface of both the shielded and exposed areas of the substrates, as well as the dimensions of the laser‐induced periodic surface structures, were determined (by atomic force microscopy, laser confocal microscopy and scanning electron microscopy), compared with observations and measurements made on samples treated directly (without a contact mask) under the same conditions. The morphology of the interface between the treated and untreated regions was also closely studied. Surface chemistry of treated samples was studied in detail by X‐ray Photoelectron Spectroscopy. The detailed study of surface chemistry of modified PEN and PS revealed a significant increase of oxygen concentration for laser treated PS and increase of carboxyl groups in case of PEN. The potential application of this research can be found in biotechnology, micro technology and several other fields. Copyright © 2016 John Wiley & Sons, Ltd. 相似文献
980.