The article deals with the analysis of experimental data on reconstruction of cement mill axles by the auxiliary machine at the place of operation. Based on the experimental research in repair the regression models of large-size equipment are developed, coefficients of equations of regression are defined. Importance of coefficients is estimated, and the adequacy of regression models is checke
High-resolution synchrotron x-ray diffraction measurements were performed on
single crystalline and powder samples of BiMn2O5. A linear temperature
dependence of the unit cell volume was found between T_{N}=38Kand100K,suggestingthatalow−energylatticeexcitationmayberesponsibleforthelatticeexpansioninthistemperaturerange.BetweenT∗65KandTN,alllatticeparametersshowedincipientmagnetoelasticeffects,duetoshort−rangespincorrelations.Ananisotropicstrainalongthea−directionwasalsoobservedbelowT∗.BelowTN,arelativelylargecontractionofthea−parameterfollowingthesquareoftheaveragesublatticemagnetizationofMnwasfound,indicatingthatasecond−orderspinhamiltonianaccountsforthemagneticinteractionsalongthisdirection.Ontheotherhand,themorecomplexbehaviorsfoundforbandc$ suggest additional magnetic transitions below
T_{N} and perhaps higher-order terms in the spin hamiltonian. Polycrystalline
samples grown by distinct routes and with nearly homogeneous crystal structure
above T_{N} presented structural phase coexistence below T_{N}, indicating a
close competition amongst distinct magnetostructural states in this compound.Comment: 23 pages, 7 figure