1990—1991年中国天文学科研文献的统计和分析

通过对1991年《中国天学》提供的1990－1991年间的中国天学科研献利用献计量学进行统计与分析，给出了描述中国天学科研生产率、献单位和献数量之间关系及献分布的数学模型，得到了中国天学研究必须提高工作效率的结论及反映各分支学科内各类单位和各位活跃与否的统计数据，这些教学模型和统计数据能为科研管理的组织和献情报部门提供实现有效科学管理和优质服务的可靠依据，进而促进直接生产力的转化，同时本的讨论方法和分析结果也能适合于其他学科领域。     

国土资源部4项成果获国家科技进步奖

3月28日在北京隆重举行的国家科学技术奖励大会上，国土资源部的4项成果荣获国家科学技术进步奖。这些项目分别是：国家科学技术进步奖一等奖：罗布泊地区钾盐资源开发利用研究。国家科学技术进步奖二等奖：中国主要成矿区带矿产资源远景评价、四川省巴塘县夏塞银铅锌矿床普查评价和上海地面沉降监测标技术与重大典型建筑密集区地面沉降防治研究。据统计，国土资源部成立以来。共有20个项目获国家科技进步奖。     

应对全球气候变暖:中国的责任和气度

今年2月,联合国政府间气候变化专门委员会(IPCC)相继在法国巴黎和比利时布鲁塞尔召开全球气候变暖评估会议,尽管各国代表在许多问题上争议     

从昭陵、昭阳到邵阳

邵阳古称昭陵、邵陵、邵州、邵阳、宝庆,是一座历史古城。西周召伯,甘棠布政;春秋白善,垒土筑城,距今已有2500余年。西汉初（前202）置昭陵县,这是邵阳有史以来第一个县名,也是第一个汉民族政权。     

Spatial structure of central places in Jilin Central Urban Agglomeration,Jilin Province,China

Using the radius of gyration from fractal theory, this paper describes the calculation of fractal dimensions for the four tiers of central places in the Jilin Central Urban Agglomeration(JCUA), Jilin Province, China and the structural characteristics of each tier: 1) the 1st tier central place, Changchun Proper(not including Shuangyang District), provides the most service functions and has the most stable primate position; 2) the 2nd tier central places, Jilin Proper, Siping Proper, Liaoyuan Proper and Songyuan Proper have unclear statuses and do not provide certain functions; 3) the 3rd tier central places comprise 23 county-level cities, counties and urban districts(including Shuangyang District of Changchun), exhibiting a dense spatial structure that agrees with theory; 4) the 4th tier contains the largest number of central places(248 designated towns), but they are loosely distributed. In this study, a spatial image of the JCUA was created, based on vectorized data of the urban settlement distribution, which was then modified and abstracted to create a hexagonal network covering the JCUA. Compared to the traditional central place model, the modified spatial image conforms to the K = 3 principle. In reality, however, the growth of some 3rd tier central places should be increased with the cities being upgraded to the 2nd tier so as to overcome that tier′s functional deficiency. The loose distribution in the 4th tier should also be changed. This apparent anomaly can be explained by the fact that the classic hexagon model used to describe the way market areas layout does not exist in the real world. However, this should not be viewed as an obstacle to using central place theory. If its assumptions are properly applied, it can still assist research into the spatial structure of regions.     

市井人物

劳动20岁当工人那年,任市郊煤矿青年突击队队长,三天三夜不下第一线,刷新了日掘煤省纪录。尔后时来运转入党提干读大专。以前周身黑煤的拼命三邓变为白领阶层。劳动就任的第二个官职是食堂主任。好个劳主任挖煤是好手炒菜亦达标,上任首月便使食堂扭亏为盈,虽然累得眼眶像涂了墨、脚步像踩了棉,但第三个月却被撤了职下工区当     

环球

正美国:成为全球最大石油生产国美国能源信息署(EIA)公布的最新报告显示,得益于页岩革命,美国石油产量达到25年来的高位,随之而来的是,2013年美国的原油进口量比5年前下降了15%。EIA还预测,到2016年,美国的原油日产量可能达到950万桶,接近960万桶的历史峰值,而960万桶的辉煌出现在久已过去的1970年。国际能源署(IEA)也在其年度能源展望报告中预测,美国将在2016年前取代沙特,成为全球最大石油生产国。(中国能源报)     

Sedimentary Features and Their Implications of Microdigital Stromatolites from the Mesoproterozoic Wumishan Formation at the Jixian Section in North China

<正>The Mesoproterozoic Wumishan Formation at the Jixian section in Tianjin is a set of more than 3000-m-thick stromatolitic carbonate succession.In this succession,several lithofacies units,that is,the subtidal stromatolitic biostrome,the thrombolitic bioherm,tidal-flat micritic dolomite and lagoon dolomitic shale,make up many meter-scale cycles of the peritidal carbonate type that have been nominated as the Wumishan cycles.Importantly,many microdigital stromatolites make up the stromatolitic biostrome unit of the Wumishan cycles in the lower part of the Wumishan Formation. These microdigital stromatolites have been grouped as a stromatolitic assemblage by paleontologists, that is,Pseudogymnosolen mopanyuensis-Scuphus-Yangzhuang columnarisassemblage.These microdigital stromatolites had also been interpreted as the aragonite(tufa) sea-floor precipitates by sedimentologists,and has further been thought as the special products of the transitional period from the sea-floor aragonite precipitates of the Archean to the clastic and muddy carbonates of the Neoproterozoic.Although there are some restrictions for the stratigraphic meaning of the concept of the stromatolitic assemblage,detailed studies on classification by paleontologists provide an important clue to understand the sedimentological meaning of the microdigital stromatolites.Furthermore,an important and obvious horizon for the end of the microdigital stromatolites was recorded in the Mesoproterozoic Wumishan Formation at the Jixian section,which provides useful information to understand the stromatolite decline occurred at c.1250 Ma and the evolving carbonate world of the Precambrian.     

兔年百公斤贺岁金条“抢”光之谜待破 中国金币南京宝祥金店特许店解谜

中国金币总公司每年发行的贺岁金条成了抢手货。兔年尚未到来,且兔年贺岁金条的价格为羊年贺岁金条的3倍,但分到南京的100kg金条还没正式上柜就被及早订购的客户先下手为强了。     

政策

中国银行近日,中国银行下发通知,将首套房的优惠利率由7折升至8．5折。与此同时,中行已经全面停止了与中介的二手房合作。