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IrinaA.Andreeva Vyacheslav I.Kovalenko Vladimir B.Naumov 《中国科技期刊研究》2007,23(1):73-82
Crystalline and melt inclusions were studied in garnet, diopside, potassium feldspar, and sphene from the garnet syenite porphyry of the carbonatite-bearing complex Mushugai-Khuduk, southern Mongolia. Phlogopite, clinopyroxene, albite, potassium feldspar, sphene, wollastonite, magnetite, Ca and Sr sulfates, fluorite, and apatite were identified among the crystalline inclusions. The melt inclusions were homogenized at 1010℃～1080℃ and analyzed on an electron microprobe. Silicate, salt, and combined silicate-salt melt inclusions were found. Silicate melts show considerable variations in SiO2 concentration （56 to 66wt% ）, high Na2O ＋ K20 （up to 17wt% ）, and elevated Zr, F, and Cl contents. In terms of bulk rock chemistry, the silicate melts are alkali syenites. During thermometric experiments, salt melt inclusions quenched into homogeneous glasses of predominantly sulfate compositions containing no more than 1.3wt% SiO2. These melts are enriched in alkalis, Ba, Sr, P, F, and Cl. The investigation of the silicate and salt melt inclusions in minerals of the garnet syenite porphyries indicate that these rocks were formed under influence of the processes of crystallization differentiation and magma separation into immiscible silicate and salt （sulfate）liquids. 相似文献
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Based on field research conducted in 1997-98 in St Petersburg, Russia, this paper explores the contemporary status and viability of the postcommunist elementary and secondary private schools. Findings from in-depth qualitative interviews, observations and analysis of documents suggest that the Russian private schools find themselves in a perplexed and precarious situation. Although formally legalised, they operate amidst the anomic situation of legal contradictions. Financially unstable, they engage in a dual economy with heavy reliance on informal networks, sometimes criminal in nature. It is predicted that the current socioeconomic crisis will diminish the number and diversity of private schools. It is argued that private schools' survival depends on the stabilisation of the Russian economy, and political and legal protection of minority rights. 相似文献
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The relevance of the present study is due to the importance of developing creativity which is considered to be the target and the result of education. Modern society demands from individuals non-standard actions and approaches, flexibility, an ability to formulate new ideas and original ways of thinking when solving urgent problems in the course of life. Facilitating the formation of a personality with a strong intellectual potential capable of creative thinking is set as one of the priorities in the federal and regional documents that determine the direction of educational institutions’ development. The generalized cognitive ability to create and solve tasks is the specific feature of intelligence. The tasks are used in the educational process as a means of presentation, consolidation and acquisition of new knowledge. Thus, the aim of our research is to explore whether using the system of open type tasks can be an effective way of improving the level of creativity development in secondary school students. The main methods in this experiment are modeling the system of open type tasks and the system analysis of large samples of experimental data based on assessment according to a two-point scale of four parameters: the optimality of ideas suggested by students, the efficiency of students’ reasoning, the originality of their answers and the degree of the investigation of solutions. Our experimental research made it possible to design new methods of developing creativity in secondary school students. 相似文献
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IrinaP.Solovova Theodoros Ntaflos Andrei Girnis Natalya N.Kononkova Vyacheslav V.Akinin 《中国科技期刊研究》2007,23(1):83-92
Melt and fluid inclusions were studied in the minerals of Cenozoic olivine melanephelinites from the Chukehi Peninsula, Russia. The rock contain several generations of olivine phenocrysts varying in composition at mg=0.88 - 0.77. The phenocrysts bear fluid and melt inclusions recording various stages of melt crystallization in volcanic conduits and shallow magma chambers. Primary fluid inclusions are CO2-dominated with a density of up to 0.93 g/cm^3. All fluid inclusions are partially leaked, which is indicated by haloes of tiny fluid bubbles around large fluid inclusions in minerals. Melt inclusions contain various daughter crystals, which were completely resorbed in thermometric experiments at about 1230~C. Assuming that this temperature corresponds to the entrapment conditions of the CO2 fluid inclusions, the minimum pressure of the beginning of magma degassing is estimated as 800MPa. Variations in the compositions of homogenized silicate melt inclusions indicate that olivine was the earliest crystalline phase followed by clinopyroxene, nepheline and orthoclase. This sequence is in agreement with the mineralogy of the rocks. The melts are strongly enriched in incompatible trace elements and volatiles （in addition to CO2 , high C1, F, and S contents were detected）. There are some differences between the compositions of melts trapped in minerals from different samples. Variations in SiO2 , FeO, and incompatible element contents are probably related to melt generations at various levels in a homogeneous mantle reservoir. 相似文献
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V. E. Karpov 《Scientific and Technical Information Processing》2013,40(5):286-291
This paper critically examines a number of methodological issues of evolutionary computations. The conclusion is made that under the existing notions the evolutionary branch of AI is unlikely to go beyond search optimization methods. A number of issues, whose solution could turn evolutionary computing into the truly mainstream of development of intelligent systems, are provided. 相似文献
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V. E. Karpov 《Scientific and Technical Information Processing》2016,43(5-6):281-288
This paper deals with mobile robot control-system (CS) architecture from the point of view of a sign system. The approach is based on the interpretation of a sign as the symbol–denotatum–signification triad in terms of the CS semantic network. It is shown how the mechanisms for the generation and perception of phrases can be implemented within the proposed approach. An important role in communication via language between robots is the emotion mechanism. The problem of the implementation of contagious behavior is considered as an example. 相似文献
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