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The interaction of components in the TlSe-Pr2Se3 system was studied by differential thermal, X-ray powder diffraction, and microstructural analyses and also by microhardness and density measurements. The state diagram of this system was constructed. It was found that the section TlSe-Pr2Se3 is a quasi-binary section of the Tl-Pr-Se ternary system. In the TlSe-Pr2Se3 system at the component ratio 1: 1, a new chemical compound, TlPr2Se4, forms, which melts congruently at 1295°C. In the system based on TlSe, solid solutions form until 3.5 mol % Pr2Se3, and in the system based on Pr2Se3, solid solutions occur until 2.5 mol % TlSe.  相似文献   
2.
The Er-Sn-Se system was studied by differential thermal analysis, X-ray powder diffraction, and microstructure examination and also by microhardness and density measurements. A congruent triangulation scheme and a liquidus surface projection were constructed. Fourteen primary crystallization fields, including those of the ternary compounds ErSnSe2, Er2SnSe4, Er2SnSe5, and Er2Sn3Se9, were found, and the types and coordinates of nonvariant and monovariant equilibria were determined.  相似文献   
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Every submartingale SS of class DD has a unique Doob–Meyer decomposition S=M+AS=M+A, where MM is a martingale and AA is a predictable increasing process starting at 0.  相似文献   
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In this paper, we study the Edgeworth expansion for a pre-averaging estimator of quadratic variation in the framework of continuous diffusion models observed with noise. More specifically, we obtain a second order expansion for the joint density of the estimators of quadratic variation and its asymptotic variance. Our approach is based on martingale embedding, Malliavin calculus and stable central limit theorems for continuous diffusions. Moreover, we derive the density expansion for the studentized statistic, which might be applied to construct asymptotic confidence regions.  相似文献   
5.
The interaction character of the InS-Sb2Te3 system was studied by differential thermal analysis, X-ray powder diffraction, microstructure examinations, microhardness measurements, and density determinations, and its phase diagram was constructed. The InS-Sb2Te3 phase diagram is a partially non-quasi-binary section of the In,Sb∥S,Te ternary reciprocal system. Two compounds are formed in the InS-Sb2Te3 system, namely: In3Sb2S3Te3 and InSb2Te3S. Sb2Te3-based solid solutions at room temperature have an extent of up to 6 mol % InS, while InS-based solid solutions are virtually nonexistent.  相似文献   
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