排序方式： 共有7条查询结果，搜索用时 15 毫秒
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Jacques Savoy 《Information Retrieval》2007,10(6):509-529
This paper reports on the underlying IR problems encountered when indexing and searching with the Bulgarian language. For
this language we propose a general light stemmer and demonstrate that it can be quite effective, producing significantly better
MAP (around + 34%) than an approach not applying stemming. We implement the GL2 model derived from the Divergence from Randomness paradigm and find its retrieval effectiveness better than other probabilistic, vector-space and language models. The resulting
MAP is found to be about 50% better than the classical tf idf approach. Moreover, increasing the query size enhances the MAP by around 10% (from T to TD). In order to compare the retrieval
effectiveness of our suggested stopword list and the light stemmer developed for the Bulgarian language, we conduct a set
of experiments on another stopword list and also a more complex and aggressive stemmer. Results tend to indicate that there
is no statistically significant difference between these variants and our suggested approach. This paper evaluates other indexing
strategies such as 4-gram indexing and indexing based on the automatic decompounding of compound words. Finally, we analyze
certain queries to discover why we obtained poor results, when indexing Bulgarian documents using the suggested word-based
approach. 相似文献
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Angela Cannon 《Slavic & East European Information Resources》2013,14(2-3):91-119
Nikola V. Mikhov (1877–1962) set the standard for modern bibliographers in Bulgaria. He compiled major bibliographies of Bulgarica, or foreign works on Bulgaria, concentrating on the history and economics of Bulgaria and Turkey before 1878, the year Bulgaria gained autonomy from the Ottomans. Mikhov combed the collections of important Western European libraries in France, Belgium, Germany, Austria, and other countries to examine works for inclusion in his bibliographies. Using both published and archival sources, the author surveys his life, his bibliographic method, and his more important bibliographies. 相似文献
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Wojciech Zalewski 《Slavic & East European Information Resources》2013,14(1):52-57
Szwede Slavic Books, the largest Slavic bookstore in the United States, ceased operations in May 2010. However, throughout its operation, the bookstore made an enormous contribution to Slavic culture and Slavic library collections in the United States. In this article, the author introduces the owners, Irena and Jerzy Szwede, and longtime employee Vera Shemelis. Additionally, he discusses the firm, its books, and the special atmosphere of the store. 相似文献
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Kaloyan Stanev 《国际体育史杂志》2013,30(15):1674-1694
AbstractBulgaria was one of the leading sport nations of the second half of the twentieth century; however, the Bulgarian national anthem has not been played at Olympic Games since 2008. In the current article, historical records on planning are compared to the results of athletes to determine the factors behind the remarkable rise and decline of Bulgarian sport during the last six decades. Historical geographical information systems (GISs) are used to analyze the spatial distribution of Olympic medals in each of the successfully developed sports. The data reveal that often the central Bulgarian planners failed to achieve the goals set in the ambitious programme of the totalitarian communist state. In spite of the efforts for diversification, Bulgaria’s success came from only seven sports mainly: less than any other of the leading sport nations during the 1970s and the 1980s. At the same time, the victories of Bulgarian athletes had little impact on the sport activity of the common Bulgarian. 相似文献
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目的：探讨负重深蹲练习与保加利亚蹲练习两种不同的下肢力量训练方式对冰球运动员专项移动能力的影响,并比较两种训练方式对提升冰球运动员滑行能力的差异。方法：将18名U16冰球运动员随机分为保加利亚蹲组和负重深蹲组,对其训练前后冰上30米滑行、冰上重复冲刺、8字滑行以及陆地30米跑、立定三级跳、侧跨跳、Y-Balance成绩变化进行测试。结果：两种下肢力量训练方式均可提高冰球运动员的冰上滑行能力、下肢爆发力及下肢平衡能力。在冰上滑行能力方面,保加利亚蹲组冰上重复冲刺能力提高优于负重深蹲组,具有显著性差异,冰上8字滑行速度两组间不存在显著性差异;在下肢爆发力方面,保加利亚蹲组30米冲刺跑成绩显著优于负重深蹲组。在下肢Y-Balance测试方面,两组不具有显著性差异。结论：保加利亚蹲与负重深蹲练习均可以显著提高男子U16冰球运动员的直线加速滑行能力,前者在提高重复冲刺能力方面显著优于手者,两种练习均可以提升男子U16冰球运动员的下肢爆发力与平衡能力。 相似文献
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Angela Cannon 《Slavic & East European Information Resources》2013,14(4):305-368
This article describes the development of the Bulgarian collection at the Library of Congress from its beginnings in the late nineteenth century to the present. It covers international exchanges, approval plans, special purchases, and federal library transfers. In addition to the chronological narrative, there are separate sections for the newspaper, rare book, and émigré collections. The article relates the growth of the Bulgarian collection to overall trends within the Library of Congress and discusses the contributions of key individuals. 相似文献
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