构建"川陕苏区研究数据库"的探讨

阐述了"川陕苏区研究数据库"建设的意义,介绍了目前本课题的研究现状,讨论了"川陕苏区研究数据库"建设中的主要内容和创新点.     

西部大开发中四川高校科技成果转化的对策分析

随着西部大开发战略的实施,四川的经济社会发展迅速,四川高校科技事业取得了较大的成绩,科技实力大为增强,高校科技成果转化成效显著,但各种原因,限制了高校科技成果转化,必须统筹协调,完善发展思路,促进高校科技成果转化全面协调可持续发展。     

第二次"湖广填四川"与三峡井盐业及社会的发展变迁

明末清初,四川人口锐减.在清政府“招抚外省民众入川垦殖“的宽优政策的鼓励之下,第二次“湖广填四川“的移民运动渐次涌上高潮.雍正年间,已涌动近五十年的移民大潮,似乎得到有效控制而宣告结束,但实际上却并未完全消歇,乾隆时期,则又再次涌现高峰.在渝东三峡地区,长期遭受战乱破坏的井盐业,随着移民的不断涌入,逐渐兴旺发达起来.盐业的兴盛亦带动了整个三峡地区煤炭工业和水陆运输业的发展以及城镇商业的繁荣和文化的复苏.乾隆之后,渝东三峡地区各大盐场所在地,已呈现出标准的移民社会形态.     

REE composition in scheelite and scheelite Sm-Nd dating for the Xuebaoding W-Sn-Be deposit in Sichuan

The scheelite with large size and euhedral shape from Xuebaoding, Sichuan Province is an ideal min- eral to study REE patterns and Sm-Nd dating of non-gold deposits. The scheelite has diameters of 1― 10 cm and colors of pale beige to deep orange. Most of these scheelites occur in association with beryl, cassiterite and muscovite. The rare earth elements indicate that scheelite samples from Xuebaoding W-Sn-Be deposits contain high concentrations of rare earth elements with total ΣREE Y contents in the range of 369―1725 μg·g?1 and nearly all of these scheelite samples are enriched in LREE and depleted in HREE and have negative Eu anomalies. The REE patterns of the scheelites are similar to those of A-type granite with obvious tetrad effect, similar to that of type II scheelites. Based on reported fluid inclusion studies, the mineralizing-fluid of the Xuebaoding W-Sn-Be deposit indicates low Na activity. The REE patterns of the scheelite are probably controlled by partition coefficient in hydrothermal fluid. In the 147Sm/144Nd-143Nd/144Nd diagram, the scheelites show a linear array corresponding to an isochron age of 182.0±9.2 Ma (MSWD = 0.52). The Sm-Nd age represents the formation age of the scheelite and can indicate that the W, Sn and Be mineralization at Xuebaoding took place in the Early Yanshanian. The Sm-Nd dating result is important for the study of the multi-metal resources in western Sichuan Province.     

中国四川荞麦属(蓼科)一新种——花叶野荞麦

描述了采自中国四川阿坝州蓼科(Polygonaceae)荞麦属(Fagopyrum)新种花叶野荞麦(Fagopyrum polychromofolium A.H.Wang J.L.Liu et P.Yang)。新种叶片上面叶脉紫红色,极明显,叶面绿色,腊质层灰白色,较厚,叶片显花叶,花被片背面中下部显紫红色。果三棱形,长4～6mm,宽约3～4mm,微露出于宿存花被。     

东西方体育文化与中国现代学校体育思想

本文根据教育学、学校体育学及比较学、决策学等有关理论知识,从东西方体育文化的发展入手,采用文献资料综述的研究方法,从宏观角度,对中国现代学校体育思想的构建进行了阐述,旨在挖掘和完善学校体育指导思想的理论体系.     

甲骨文中的 字与 字

甲骨文中的 字从网从双手，会意，像两手张网之形，在卜辞中用为动词。 字从鱼从 ，会意，像两手张网以捕鱼之形。或以为二字乃一字而异体，误。从新近出土的殷墟花园庄东地卜辞来看， 亦可与诸如豕、 等其他动物组成文字。     

A 780-year record of explosive volcanism from DT263 ice core in east Antarctica

Ice cores recovered from polar ice sheet received and preserved sulfuric acid fallout from explosive volcanic eruptions. DT263 ice core was retrieved from an east Antarctic location. The ice core is dated using a combination of annual layer counting and volcanic time stratigraphic horizon as 780 years (1215-1996 A.D.). The ice core record demonstrates that during the period of approximately 1460-1800 A.D., the accumulation is sharply lower than the levels prior to and after this period. This period coincides with the most recent neoglacial climatic episode, the "Little Ice Age (LIA)", that has been found in numerous Northern Hemisphere proxy and historic records. The non-sea-salt SO42- concentrations indicate seventeen volcanic events in DT263 ice core. Compared with those from previous Antarctic ice cores, significant discrepancies are found between these records in relative volcanic flux of several well-known events. The discrepancies among these records may be explained by the differences in surface topography, accumulation rate, snow drift and distribution which highlight the potential impact of local glaci-ology on ice core volcanic records, analytical techniques used for sulfate measurement, etc. Volcanic eruptions in middle and high southern latitudes affect volcanic records in Antarctic snow more intensively than those in the low latitudes.