巧用HyperSnap-DX软件来制作数学课件

介绍了HyperSnap-DX软件的抓图技巧,灵活地抓取了其他文稿中的数学图形和数学公式等,再将这些内容以图片的形式插入课件中,避免了在课件制作过程中重复画图和编辑公式。     

西藏高原植物区系中特有属的研究

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.     

我国天文学期刊引文统计分析

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。     

创建海峡两岸科技信息资源共享的初步探讨

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。     

高校职称评定的群体决策行为分析及其规范研究

通过深入分析高校职称评定的全过程，指出职称评定过程中的非正式组织，职称申报人与评审人之间的信息不对称、评审人的机会主义行为和内部人控制等是导致评审过程与结果出现不公正的主要原因，并对高校职称评定过程进行了重新设计。     

浅谈期刊编辑在编辑出版活动中如何贯彻实践《著作权法》

编辑工作是整个出版工作的中心环节,但是一些期刊编辑人员由于对《著作权法》的法律法规意识比较淡薄,从而造成在实际工作中存在一些违法侵权问题。本文指出了期刊编辑在工作中违背法规的症结,分析了一些不良做法的原因,讨论了编辑恪守《著作权法》的意义,并提出了贯彻实施《著作权法》的一些措施。     

国外城市公共图书馆服务体系建设及其启示

纽约、伦敦、东京三大城市公共图书馆服务体系建设在管理模式、资源配置、地域分布等方面表现出国外城市公共图书馆服务体系建设的特点。新时期我国城市公共图书馆服务体系建设应该借鉴国外的有益经验,在推行总分馆制、合理规划公共图书馆服务网点、完善城市图书馆资源配置及管理方式、增强公共图书馆分馆设置和服务效果等方面继续努力。     

浅论地方高校图书馆的可持续发展

作为地方高校信息服务中心,地方高校图书馆对高等教育质量的提高和学校的发展有着举足轻重的作用。地方高校图书馆的可持续发展关系到地方高校的可持续发展。在阐述地方高校图书馆可持续发展涵义的基础上,分析了地方高校图书馆可持续发展的基本条件,探讨了实现地方高校图书馆可持续发展的对策。