along with more and more trajectory dataset being collected into application servers, the research in trajectory clustering has become increasingly important topic. This paper proposes a new mobile object trajectory Clustering algorithm (Trajectory Clustering based Improved Minimum Hausdorff Distance under Translation, TraClustMHD). In this framework, improved Minimum Hausdorff Distance under Translation is presented to measure the similarity between sub-segments. In additional, R-Tree is employed to improve the efficiency. The experimental results showed that this algorithm better than based on Hausdorff distance and based on line Hausdorff distance has good trajectory clustering performance.

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In this article we are talking about particularities of usage of different e-learning courses in teaching Chinese students of the first term Russian as a foreign language. The author describes in detail the difficulties faced by Chinese students in the process of learning Russian as a foreign language, and also gives a brief description of experience of Russian authors of various courses of the Russian language, designed for Chinese students. The author also provides a comparative description of e-courses for foreign students, analyzing the advantages and disadvantages of these courses. The main electronic courses analyzed by the author were: Success+, Learn Russian, Russian for Everyone, Education in Russian, Paints, 3 ears, Interactive author's courses of the Pushkin Institute and A modern electronic textbook "Golden Ring 1. Russian language course Interactive author's courses of the Pushkin Institute was considered by the author to be the most suitable course for teaching Chinese students in the first year of Russian language training, since it presents the most complete and well-structured learning system, including texts, audio and video materials, as well as numerous diverse tasks aimed at improving the effectiveness of the process of mastering the Russian language. As a result, the author emphasizes that in the process of using e-courses in teaching Chinese students Russian, the main emphasis should be placed on the development of the secondary language personality of the student, as well as on the formation of a number of necessary competencies of Chinese students of the first term.

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