检索结果-南通市图书馆

Lu Xun in the Rhetoric of the Sino-Soviet Split： A View from Contemporary Russia

在线全文

学校读者我要写书评

暂无评论

Frontiers of Literary Studies in China-Selected Publications from Chinese Universities 2013年第3期7卷 483-493页

作者： Olga medvedeva Department of AHKR University of Bergen Postbox 7805 NO-5020 Bergen Norway

The historical role of the prominent Chinese writer, social activist and thinker Lu Xun （1881-1936）, is difficult to overestimate. His works influenced social change within China and became recognized internationally. For these and other reasons, he was of particular interest in the Soviet Union. Since 1932, his works have been published in numerous editions in Russian and have received a great deal of scholarly attention in the Soviet Union. Such unprecedented attention was initially based on the idea that he held similar revolutionary sentiments to those prevailing in the Soviet Union. Later, from the second half of the 1960s to the early 1970s, the ideological disagreements between the Soviet Union and China influenced the direction of Lu Xun studies in the Soviet Union. Soviet leader Khrushchev called for peaceful coexistence with the capitalist West, while Mao Zedong stressed the universal character of the proletarian revolution. Lu Xun was highly respected in both the USSR and China, and thus became an influential tool in this polemic. But, for Soviet scholars, this renewed focus on Lu Xun offered an opportunity to provide a new perspective on the writer＇s works. This paper analyzes how the Sino-Soviet split influenced Russian academics＇ positions on Lu Xun. The focus is on the three main points of contention in the ideological disagreements between the PRC and the USSR. First, Soviet critics focused on the psychological aspects and individualism in the Lu Xun＇s works. Second, a special focus on humanistic elements in the writer＇s ideas can be seen as a result of the Soviet disagreement with the Cultural Revolution＇s period. Third, by pointing to the internationalist aspects of Lu Xun＇s writings, Soviet scholars attempted to expose the Sinocentric political attitudes of the ruling circles in China.

关键词： Lu Xun Sino-Soviet split Russian intellectual history

Homogenization of Linear Parabolic Equations with a Certain Resonant Matching Between Rapid Spatial and Temporal Oscillations in Periodically Perforated Domains

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2019年第2期35卷 340-358页

作者： tatiana LOBKOVA Department of Mathematics and Science Education Mid Sweden University

In this article, we study homogenization of a parabolic linear problem governed by a coefficient matrix with rapid spatial and temporal oscillations in periodically perforated domains with homogeneous Neumann data on the boundary of the holes. We prove results adapted to the problem for characterization of multiscale limits for gradients and very weak multiscale convergence.

关键词： Homogenization two-scale convergence multiscale convergence periodically perforated domains

Role of social and individual experience in interaction of the meadow ant Formica pratensis （Hymenoptera： Formicidae） with ladybird imagines and hoverfly larvae

在线全文

学校读者我要写书评

暂无评论

Insect Science 2015年第3期22卷 440-450页

作者： tatiana A. Novgorodova Institute of Systematics and Ecology of Animals Siberian Branch of the Russian Academy of Sciences Frunze str. 11 Novosibirsk 630091 Russia

The ability to recognize aphidophages is one of the key points in the protection ants provide aphids against their natural enemies. Behavior of honeydew collectors from nature （＂field,＂ control） and laboratory reared ＂naive＂ ants of Formica pratensis Retzius, which had never met either ＂mature＂ workers or aphids and aphidophages, was observed during their pairwise interactions with ladybird imagines and hoverfly larvae. The majority of the ＂naive＂ ants perceived ladybirds as an enemy at their first encounter attacking them immediately without any prior antennation. Ants seem to have a certain innate ＂enemy image＂ that lets them react very quickly to protect aphids. Hoverfly larvae were rarely attacked by both ＂field＂ and ＂naive＂ ants （〉 15%）. During tests with ladybirds ants from nature attacked them and also demonstrated the most aggressive reactions （series of bites and ＂death grip＂） less frequently than the ＂naive＂ ants. The percentage of ants avoiding aphidophages after a contact with their chemical defense （reflex bleeding and glue-like saliva） was significantly higher in the control group. Whereas the ＂naive＂ ants did not learn to avoid danger, foragers from nature usually tried to avoid negative experience and used tactics of ＂short bites.＂ Overall, experience has been proved to be unimportant for displaying key behavioral reactions underlying ant-ladybird interaction. However, accumulation of experience has been assumed to play an important role in the formation of behavioral strategy that allows honeydew collectors to drive aphidophages away with lower energy costs and avoid or minimize negative consequences of aphidophages＇ chemical defense.

关键词： ants aphidophages defense enemy recognition Harmonia axyridis Meligramma triangulifera

Influence of atmospheric circulation on precipitation in Altai Mountains

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Mountain Science 2017年第1期14卷 46-59页

作者： MALYGINA Natalia PAPINA tatiana KONONOVA Nina BARLYAEVA tatiana Institute for Water and Environmental Problems Siberian Branch of the Russian Academy of SciencesBarnaul 656038Russia Institute of Geography Russian Academy of SciencesMoscow 117312Russia Laboratoire d'Astrophysique de Marseille UMR 7326 CNRS-INSUMarseille13388France

We analyzed the changes in precipitation regime in the Altai Mountains for 1959-2014 and estimate the influence of atmospheric circulations on these changes. Our study showed that during last 56 years the changes in the precipitation regime had a positive trend for the warm seasons(April-October),but weakly positive or negative trends for the cold seasons(November-March). It was found that these changes correspond to the decreasing contribution of "Northern meridional and Stationary anticyclone(Nm-Sa)" and "Northern meridional and East zonal(Nm-Ez)" circulation groups and to the increasing contribution of "West zonal and Southern meridional(Wz-Sm)" circulation groups,accordingly to the Dzerdzeevskii classification. In addition,it was found that the variation of precipitation has a step change point in 1980. For the warm seasons,the precipitation change at this point is associated with the reduced influence of "West zonal(Wz)","Northern meridional and Stationary anticyclone(Nm-Sa)" and "Northern meridional and Southern meridional(Nm-Sm)" circulation groups. For the cold seasons,a substantialincrease of "Wz-Sm" and a decrease of "Nm-Sa","Nm-Ez" circulation groups are responsible for the precipitation change in the two time periods(1959-1980 and 1981-2014).

关键词： Altai Mountains Precipitation Atmospheric circulation

Effects of long-term medieval agriculture on soil properties:A case study from the Kislovodsk basin,Northern Caucasus,Russia

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2018年第6期15卷 1171-1185页

作者： CHERNYSHEVA Elena KHOMUTOVA tatiana FORNASIER Flavio KUZNETSOVA tatiana BORISOV Alexandr Institute of Physicochemical and Biological Problems in Soil Science Russian Academy of Sciences Institutskaya 14229o Pushchino Moscow region Russia 2 CREA - VE Consiglio per la ricerca in Agricoltura e rAnalisi della Economia Agraria Centro di Ricerea Viticoltura ed Enologia Via Trieste 23 34170 Gorizia Italy

The chemical properties and biological activities of soils were studied in the vicinity of the medieval settlement Podkumskoe-3 in the Kislovodsk basin(Northern Caucasus, Russia). Between the 5 th and 8 th centuries this area was ploughed regularly, but it was then abandoned up to the present day. It has been established that past human activity leads to soil undergoing significant transformations in terms of microbial communities and enzyme activity, and that such changes are maintained over long periods. Long-term manuring in the middle of the first millennium AD led to an increase in organic carbon content and the accumulation of nitrate nitrogen. Soils of ancient abandoned fields are associated with increases in microbial biomass, number of saprotrophic bacteria, urease activity, and fungal mycelium biomass. The observed changes in the microbiological and biochemical properties of soil were conditioned by secondary anthropogenically induced succession after the abandonment of arable lands.

关键词： Anthropogenic soils Manuring Enzymeactivity Microbial biomass North Caucasus MiddleAges

Alternating-Current Transport Properties in Nd0.7Sr0.3MnO3 Ceramic with Secondary Phases

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2012年第7期29卷 226-229页

作者： CHEN Shun-Sheng YANG Chang-Ping LUO Xiao-Jing medvedeva I V School of Mathematics and Physics Hubei Polytechnic UniversityHuangshi 435003 Faculty of Physics and Electronic Technology Hubei UniversityWuhan 430062 Institute of Metal Physics Ural Division of the Russian Academy of SciencesEkaterinburg 620219

Nd0.7 Sr0.3MnO3 ceramics with secondary phases were prepared by ball-milling and post heat- treatment at 1623 K for 3,7 and 13h,*** results from x-ray diffraction and energy dispersed spectroscopy show that some secondary phases are introduced and grow gradually with sintering *** secondary phases have significant effects on the ac *** all the samples,the real part of impedance (Zr) decreases with increasing frequency and the Zr peak moves to a higher ***,for a given frequency the Zr peak decreases with sintering ***,for samples B and C which were sintered for a longer time than sample A,an additional Zr peak appears at a higher temperature and gradually increases with sintering *** reposition of trapped charges in phase/grain boundaries or secondary phases is supposed to be responsible for the unusual relaxation process.

关键词： ceramics relaxation Phase

ON AUGMENTED LAGRANGIAN METHODS FOR SADDLE-POINT LINEAR SYSTEMS WITH SINGULAR OR SEMIDEFINITE （1, 1） BLOCKS

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Computational Mathematics 2014年第3期32卷 297-305页

作者： tatiana S. Martynova Computing Center Southern Federal University Rostov-on-Don Russia

An effective algorithm for solving large saddle-point linear systems, presented by Krukier et al., is applied to the constrained optimization problems. This method is a modification of skew-Hermitian triangular splitting iteration methods. We consider the saddle-point linear systems with singular or semidefinite （1, 1） blocks. Moreover, this method is applied to precondition the GMRES. Numerical results have confirmed the effectiveness of the method and showed that the new method can produce high-quality preconditioners for the Krylov subspace methods for solving large sparse saddle-point linear systems.

关键词： Hermitian and skew-Hermitian splitting Saddle-point linear system Constrained optimization Krylov subspace method.

General techniques for constructing variational integrators

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Mathematics in China 2012年第2期7卷 273-303页

作者： Melvin LEOK tatiana SHINGEL Department of Mathematics University of California San Diego La Jolla CA 92093 USA

The numerical analysis of variational integrators relies on variational error analysis, which relates the order of accuracy of a variational integrator with the order of approximation of the exact discrete Lagrangian by a computable discrete Lagrangian. The exact discrete Lagrangian can either be characterized variationally, or in terms of Jacobi＇s solution of the Hamilton- Jacobi equation. These two characterizations lead to the Galerkin and shooting constructions for discrete Lagrangians, which depend on a choice of a numerical quadrature formula, together with either a finite-dimensional function space or a one-step method. We prove that the properties of the quadrature formula, finite-dimensional function space, and underlying one-step method determine the order of accuracy and momentum-conservation properties of the associated variational integrators We also illustrate these systematic methods for constructing variational integrators with numerical examples.

关键词： Geometric numerical integration geometric mechanics symplectic integrator variational integrator Lagrangian mechanics

Land use in agricultural landscapes with chernozems contaminated after Chernobyl accident: Can we be confident in radioecological safety of plant foodstuff?

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Soil and Water Conservation Research 2019年第2期7卷 158-166页

作者： Olga Komissarova tatiana Paramonova Radioecology&Ecotoxicology Department Soil Science FacultyLomonosov Moscow State UniversityLeninskie Gory 1-12Moscow 119991Russia

Agricultural land use in the area of the post-Chemobyl Plavsk radioactive hotspot (Tula region,Central Russia) has raised a problem of radioecological safety of obtained plant *** of 137Cs activities and inventories in components of 'soil-plant' systems of the territory has been conducted in 2014-2017 in 10 agrosystems and 2 semi-natural *** was revealed that density of 137Cs contamination of arable chernozems and alluvial calcareous soils nowadays varies in a range 140-220 kBq/m2 and exceeds radiation safety standard by^3.5-6 *** plowing of the arable soils up to 30-cm in 1986-1987 resulted in decreasing of 137Cs inventories in rooting zone by ≈ 70% for crops cultivated with shallow disk plowing (wheat,barley),and by ≈ 35% for crops cultivated with middle plowing (buckwheat,amaranth,white mustard).The investigated plants and their compartments can be grouped on the basis of transfer factor values as follows:maize (stems and leaves)> amaranth> bromegrass > vegetation of dry meadow,galega,sunflower (seeds),vegetation of wet meadow > maize (grain),soybean (pods),barley (grain),buckwheat (grain),potatoes (tubers)> white mustard (seeds),wheat (grain).It is noticeable that generative plant compartments are characterized by less 137Cs activities in comparison with stems and leaves;and that 137Cs root uptake is not coincide with total flux of mineral nutrients in 'soil-plant' *** sum,137Cs soil-to-plant transfer in the area of the Plavsk radioactive hotspot is characterized by considerable discrimination,so 137Cs activities in plants are completely in accordance with national standards.

关键词： Radioactive soil contamination Caesium-137 137Cs Arable soils 'Soil-plant' system Chernobyl accident Radioecologically safe land use