On estimation of stability in the problem of reconstructing symmetric types of distributions

New estimates of the stability of characterization of distribution types are obtained both for additive and complete types under the additional assumption that all distributions belong to symmetric types. Proceedings of the Seminar on Stability Problems for Stochastic Models, Moscow, Russia, 1996, Part II     

Reaction of <Emphasis Type="Italic">N,N</Emphasis>-dichlorosulfonamides with tribromoethylene

Reaction of aryl-and trifluoromethanesulfonic acids N,N-dichloroamides with tribromoethylene led to the formation of a mixture of N-(2,2-dibromo-2-chloroethylidene)-and N-(2,2,2-tribromoethylidene)amides of the corresponding sulfonic acids. The azomethines ratio is governed by the reaction temperature.     

Photosensitive n-Ox/p-CuIn3Se5 heterostructures

We have created photosensitive heterostructures n-Ox/p-CuIn₃Se₅ for the first time. The synthesis process is based on thermal reaction of the ternary compound with atmospheric oxygen. We have studied the voltage-current characteristics and the photoconversion quantum efficiency spectra of the indicated structures. We discuss charge transport mechanisms and photosensitivity of the created structures. We show that n-Ox/p-CuIn₃Se₅ heterostructures can be used in designing solar cells and photoanalyzers for linearly polarized radiation. __________ Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 73, No. 6, pp. 782–785, November–December, 2006.     

催化光度法测定痕量钒——钒(Ⅴ)-溴甲酚紫-过氧化氢体系

催化光度法测定钒已有报道[1～3],在0.45 mol·L-1磷酸介质及加热条件下,过氧化氢氧化溴甲酚紫褪色反应非常缓慢,而痕量钒对此反应具有较高的催化活性,且在一定浓度范围内,钒量与褪色反应程度呈线性关系,据此可建立测定痕量钒的方法.方法的检出限为1.9×10-6g·L-1,测定范围为0.003～1.8 mg·L-1.方法操作简便,重现性好,用于钢样中痕量钒的测定,结果满意.     

Optimization algorithms for three-dimensional grids in domains of rotation

Optimization algorithms for three-dimensional structured grids in domains of rotation are described.     

Classification of hexahedral cells

For three-dimensional structured grids, a classification of hexahedral cells and a criterion for their division into classes are proposed.     

Ion conductivity type and thermodynamics of dissolution of binary sulfides Sm2S3 and Tm2S3 in BaSm2S4

Solid solutions of Sm₂S₃ and Tm₂S₃ based on BaSm₂S₄ (the structural type of CaFe₂O₄) are obtained. The samples are studied using microprobe analysis and the XRD technique. The length of the solid solution region is determined. The type of ion conductivity and thermodynamics of dissolution of the binary sulfides of Sm₂S₃ and Tm₂S₃ in BaSm₂S₄ are studied. Partial molar enthalpies of dissolution of binary sulfides in basic thiosamarate are determined. A possible mechanism of defect formation is suggested.     

Calorimetric investigations of phase transitions in the cryolites (NH4)3Ga1−x ScxF6(x=1.0,0.1,0)

The specific heat of the cryolites (NH₄)₃Ga_1−x Sc_xF₆ with x=1.0, 0.1, and 0 was measured. The thermodynamic parameters of the phase transitions were determined. A previously unknown phase transition was found in the scandium compound at T=243 K. Fiz. Tverd. Tela (St. Petersburg) 41, 523–528 (March 1998)     

Synthesis of complex sulfide phases BaSm<Subscript>2</Subscript>S<Subscript>4</Subscript>-Tm<Subscript>2</Subscript>S<Subscript>3</Subscript> and studies of their electrolytic properties

The possibility of synthesizing complex sulfide phases in the BaSm₂S₄-Tm₂S₃ system has been studied. Tm₂S₃ solid solutions were obtained with BaSm₂S₄ (CaFe₂O₄ structural type). The samples were identified by X-ray diffraction analysis and electron microscopy. The range of the solid solutions was determined. The total conductance was studied, and the conductance activation energy was calculated for samples with different dopant contents. The electrolytic properties of basic ternary sulfide and complex sulfide phases in the BaSm₂S₄-x mol % Tm₂S₃ system were investigated. A possible mechanism of defect formation was proposed.