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101.
V. A. Pashkov 《Mechanics of Composite Materials》1973,9(6):982-984
The statistical characteristics of the static strength of AG-4s entering into the equations of the strength criteria for anisotropic materials are determined. The agreement between a series of existing criteria and the test data is estimated. A theoretical estimate of the mathematical expectation and variance of the function for the criterion best adapted to the material in question is obtained on the basis of the method of linearization of a function of several random arguments. The theoretical and experimental data are compared.Moscow Aviation Technological Institute. Translated from Mekhanika Polimerov, No. 6, pp. 1117–1120, November–December, 1973. 相似文献
102.
Dybtsev DN Yutkin MP Peresypkina EV Virovets AV Serre C Férey G Fedin VP 《Inorganic chemistry》2007,46(17):6843-6845
Chiral-layered building motifs of zinc(II) camphorate are linked through linear N-donor ligands, forming series of three-dimensional isoreticular porous homochiral frameworks. The lengths of these linear ligands control the pore sizes and free accessible volumes of the homochiral metal-organic structures. 相似文献
103.
104.
乙醇由于具有无毒、理论能量密度高、易存储等优点,被广泛用于直接醇类燃料电池研究.乙醇电氧化是直接醇类燃料电池中重要的阳极反应,通常涉及C1和C2反应路径.C1路径中乙醇分子主要转化成二氧化碳,但该过程涉及C-C键断裂,会有COad和CH(x)ad等中间体产生;C2路径中乙醇分子转化成乙醛,最终转化成乙酸或乙酸根.为提升... 相似文献
105.
Maxim N. Sokolov Rita Hernndez‐Molina Danil N. Dybtsev Elena V. Chubarova Sergei F. Solodovnikov Natalia V. Pervukhina Cristian Vicent Rosa Llusar Vladimir Fedin 《无机化学与普通化学杂志》2002,628(11):2335-2339
Reaction of heterometal cuboidal clusters [Mo3(MCl)S4(H2O)9]3+ (M = Ni, Pd) with PhSO2Na in aqueous HCl leads to the substitution at Ni or Pd to give the [Mo3(M(PhSO2))(H2O)9—xClx](3—x)+species, isolated as supramolecular adducts with cucurbituril (Cuc) [Mo3(Ni(PhSO2))S4Cl1.17(H2O)7.83][Mo3(Ni(PhSO2))S4Cl2.22(H2O)6.78]Cl2.61 · Cuc · 15H2O ( 1 ) and [Mo3(Pd(PhSO2))S4Cl1.12(H2O)7.88][Mo3(Pd(PhSO2))S4Cl2.29(H2O)6.71]Cl2.59 · Cuc · 11H2O ( 2 ), respectively. Crystal structure of 1 and 2 was determined, revealing that the PhSO2 is coordinated via its sulfur atom (Ni — S 2.182 Å, Pd — S 2.305 Å). The structure of these isostructural compounds is built from triple aggregates {(cluster)(Cuc)(cluster)} united into zigzag chains via hydrogen bonds between coordinated PhSO2 and H2O ligands. 相似文献
106.
107.
Boris V. Paponov Danil A. Rakityansky Marina S. Samokhvalova Gleb L. Denisov Andrey Yu. Potapov Khidmet S. Shikhaliev 《Mendeleev Communications》2021,31(3):407-408
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108.
109.
L. I. Isaenko S. V. Melnikova A. A. Merkulov V. M. Pashkov A. Yu. Tarasova 《Physics of the Solid State》2009,51(3):589-592
Single crystals of K
x
Rb1 − x
Pb2Br5 solid solutions have been grown and investigated using X-ray diffraction and polarized light microscopy in the temperature
range 270–640 K. The regions of existence of the tetragonal (I4/mcm) and monoclinic (P21/c) phases have been determined. It has been demonstrated that the partial introduction of rubidium into KPb2Br5 leads to an increase in the temperature of the ferroelastic phase transition (P21/c↔mmm), so that it approaches the melting temperature. In the solid solutions with x ≈ 0.4−0.5, the temperature region of existence of the orthorhombic phase is narrowed to ≈ 1−2 K. It has been revealed that
an increase in the potassium content in the material results in a considerable increase in the incorporation coefficient of
Er3+ ions.
Original Russian Text ? L.I. Isaenko, S.V. Mel’nikova, A.A. Merkulov, V.M. Pashkov, A.Yu. Tarasova, 2009, published in Fizika
Tverdogo Tela, 2009, Vol. 51, No. 3, pp. 554–557. 相似文献
110.
A.Yu. Tarasova L.I. Isaenko V.G. Kesler V.M. Pashkov A.P. Yelisseyev N.M. Denysyuk O.Yu. Khyzhun 《Journal of Physics and Chemistry of Solids》2012,73(5):674-682
X-ray photoelectron core-level and valence-band spectra for pristine and Ar+-ion irradiated (001) surfaces of KPb2Br5, K0.5Rb0.5Pb2Br5, and RbPb2Br5 single crystals grown by the Bridgman method have been measured and fundamental absorption edges of the ternary bromides have been recorded in the polarized light at 300 K and 80 K. The present X-ray photoelectron spectroscopy (XPS) results reveal high chemical stability of (001) surfaces of KxRb1?xPb2Br5 (x=0, 0.5, and 1.0) single crystals. Substitution of potassium for rubidium in KxRb1?xPb2Br5 does not cause any changes of binding energy values and shapes of the XPS constituent element core-level spectra. Measurements of the fundamental absorption edges indicate that band gap energy, Eg, increases by about 0.14 and 0.19 eV when temperature decreases from 300 K to 80 K in KPb2Br5 and RbPb2Br5, respectively. Furthermore, there is no dependence of the Eg value for KPb2Br5 upon the light polarization, whilst the band gap energy value for RbPb2Br5 is bigger by 0.03–0.05 eV in the case of E6c compared to those in the cases of E6a and E6b. 相似文献