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121.
将灰色系统理论中的灰色因素分析技术引入运动训练过程,对运动训练中影响运动员成绩的诸因素进行动态分析。该方法克服了常规分析中样本量及样本分布规律的约束,分析结果具有较高的可信度,可为运动训练提供一定的理论参考。 相似文献
122.
论体育教育理念的三个层次 总被引:9,自引:0,他引:9
张建平 《成都体育学院学报》2002,28(5):57-59
体育教学理念直接关系到体育的发展方向与成效。确立科学的体育教育理念:一是宏观理念中的快乐体育、终身体育与创意体育;二是中观理念,尊重学生体育地位,关注学生个性发性,重视体育教育价值,突出教育民主精神;三是微观理念,即教育目标、内容、模式、来源和评价等。 相似文献
123.
王建平 《南宁师范高等专科学校学报》2008,25(3):3-6
从历史学和文艺学的角度勾勒和评述广西电视剧在1998年至2007年的发展轨迹。1998年是广西电视剧创作的拐点,此后它经历了两个阶段。在走向崛起的阶段(1998-2002)里,短篇剧获得突破,掀起创作高潮;中篇剧平稳发展,取得骄人成绩;长篇剧初显繁荣。在走进市场的阶段(2003-2007)里,广西电视剧发展以长篇剧为主,呈现出七个突出现象;广西电视剧创作和生产在2008年将走上新的高潮。近10年来,广西电视剧艺术家艰苦奋斗,寻求突破,与时俱进,屡创佳绩,担当起了时代文化所赋予的历史使命。 相似文献
124.
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126.
The Xizang (Tibetan) flora with numerous endemics is of importance in Chi-
nese flora. According to recent statistics there are in Xizang 27 genera of spermatophytes
endemic to China, being only 2.25% percent of the total number of genera in the Xizang flora.
Four of them are regarded as palaeoendemics (14.81%) and the others as neoendemics (85.19%).
These endemic genera, of 30 species and 3 varieties, belong to 17 families, of which, Umbelli-
ferae contains 6 genera, 7 species and 3 varieties; Compositae has 6 genera and 7 species, and
Gentianaceae 1 genus and 2 species. All the other families each comprises one genus with a
single species.
The cosmopolitan families together comprising 14 genera with 15 species have the highest
perecentage (52.92%) and the tropical ones (5 families, 5 genera with 5 species) come to the next
(29.42%), followed by the temperate ones (3 families, 10 genera with 10 species) (17.66%). It
shows that these endemic genera are obviously related to the tropical flora and temperate one
in essence.
According to the number of species, the genera endemic to China and occurring in Xi-
zang flora may be grouped as fallows.
Monotypic endemic ones 14 (51.85%)
Ditypic endemic ones 6 (22.22%)
Oligotypic endemic ones 4 (14.81%)
Small endemic ones 3 (11.11%)
The formation of the endemic genera is correlated with the topography, climate and en-
vironmental conditions, and they may have resulted from the diversification in geography and
climatic influence for a long time. The southeastern part of Xizang Plateau is of very diverse
ecological conditions, with the adequate precipitation, which may explain the concentration of
these endemic genera in this region.
The largest similarity coefficient (38.30%) of the genera endemic to China and occurring
in Xizang is with those in Qinghai Plateau, next, with those in Yunnan and in Sichuan pro-
vinces (both 27.60%), which shows that these endemic genera are related to the floras of the
regions mentioned above.
The difference in the horizontal distribution of these endemic genera is obviously between
the southern and northern parts of Xizang Plateau. The vertical distribution of the genera is
also rather obvious, from 800 m to 5200 m above sea level, but concentrated in the zone of 3000
m to 4500 mm. Therefore their occurrence in Xizang is not only affected by the historical
environmental conditions but also controlled by the horizontal and vertical distribution.
The origin and evolution of some endemic genera, such as Psammosilene, Parateropyrum,
Sphaerotylos, Salweenia, Ajaniopsis, Xizangia, Sinoleontopodium, are discussed in this paper.
Parateropyrum, a monotypic palaeotropic endemic, belongs to the tribe Atraphaxideae in-
cluding Atraphaxis, Calligonum and Pteropyrum. It may be a comparatively advanced group
in the tribe, and is closely related to the genus Pteropyrum which is distributed in western
Asia. The genus Parapteropyrum has possibly survived as a palaetropic-tertiary relic in this
region.
Sphaerotylos, a member of the subtribe Sphaerotylinae, the tribe Boehmerieae in the family
Urticaceae, is a comparatively primitive genus in the tribe Boehmerieae so far known. As the
other subtribes, such as Boehmerinae, Sarconchlamydinae, Orecnidinae and Maoutinae, are dis-
tributed in the tropics, rarely in the subtropics, the genus is no doubt a palaetropic -tertiary
relic.
Sinoleontopodium, belonging to the tribe lnuleae in Compositae, is also related to the ge-
nus Leontopodium. It is probable that the genus Sinoleontopodium arised later than the other.
We come to the conclusion that the southern part of Xizang Plateau is also one of thecentres of the origin and differentiation of genera endemic to China. 相似文献
127.
128.
简述了文献计量学和引文分析对图书情报工作的作用;阐明对我国天文学期刊引文统计分析的目的;提出一般引文统计的原则;介绍了这次引文统计所涉及的内容。其中包括:(1)文献老化的量度——中国天文学近6年文献的半衰期和D.Price指数值;(2)天文学期刊引文率按年代分布的特征;(3)引文按语种分布比例;(4)引文按不同时间段反映出天文系统科技人员利用文献资料的引用率,(5)引文按文献类型统计结果;(6)篇引率及与国外同类刊物的比较。最后引出了对天文学期刊引文统计结果分析的6点认识。 相似文献
129.
振兴海峡西岸经济区的区域化经济,科技信息资源是关键。为此,提出创建海峡两岸科技信息资源共享,促进海峡西岸经济区的崛起和台湾经济的共同发展。 相似文献
130.
本文从上海工业企业的现状出发,结合上海经济外向型、高科技、高档次的发展方向,探讨了开发上海企业信息咨询业的5个重点,即产品市场服务、技术改进服务、工业设计服务、政策管理服务和企业形象塑造服务,以及它们的具体内容。 相似文献