Evidences of Holocene transgression on Domingos Petrolini Swamp, southern coastal plain, Rio Grande do Sul, Brazil

The Domingos Petrolini Swamp, located on the Southern Coastal Plain of Rio Grande do Sul, near the town of Rio Grande, constitutes an ample holocene lagoonal deposit. Events related to the holocene transgression and their diverse phases of glacial-eustatic ocillations were found through palynological analysis. Bases on these palynological data, four distinct phases to the paleoenvironmental evolution of the ecosystem were identified. It has also shown a transgressive restricted marine sequence on the base , which suggests the existence of a coastal brackish lagoon or a marisme type of environment. Later, there was a gradation for continentality conditions along with a scarce pollinical record. The third phase is characterized by the presence of marine components and halophyte vegetation, showing another transgressive event in that place. Lastly, the end of direct marine influence over the swamp was recorded and also the vegetation development as it appears these days.     

重力仪垂直标定基线(武汉)

国家地震局地震研究所(中国武汉)(ISSSB)和汉诺威大学大地测量研究所(联邦德国汉诺威)(IFE)合作在武汉建立了一条用于拉柯斯特一隆贝格(简称LCR)重力仪标定的垂直标定基线。这条基线由20(10~(-5)m/S~2)和2(10~(-5)m/S~2)的二部份组成,前者共有19个站,后者11个站。该标定基线布设在武汉一座高层建筑里。为了获得所用重力仪的长波和中波的标定参数,在北京、武汉、广州三个绝对重力点间进行了飞机联测,在总段差为230(10~(-5)m/S~2)的庐山重力基线的24个测站上进行了联测。所有这些观测使用了6台LCR重力仪。平差后重力段差达到的精度对庐山基线优于±5(10~(-8)m/S~2),垂直基线优于±2(10~(-8)m/S~2)。     

一个地面天文观测的远红外光度计

我们共同研制成功了一个适用于毫米波段大气窗口的红外光度计。它由锗—镓测辐射热计组成,工作温度在1.0K 输入量AW=0.3cm~2sr,而NET=1mk/Hz~(1/2)。两个金属的网格建立了两个窗,频率分别为10cm~(-1)和5cm~(-1)。我们的光度计的特点是:(1)灵敏度高到足以达到大气辐射的量子涨落的极限,但又特别简单易于控制。(2)我们的系统不需要使用外部的泵,因此,在望远镜的焦平面上易于操作。     

聚落模型的距离与方向分析

长期以来,地理学者对主要人口中心分布于空间所形成的模型很感兴趣。     

澳大利亚奥林匹克坝铜-铀-金矿床

澳大利亚奥林匹克坝矿床以铜、铀为主,铜品位约为2～3%,铀0.5～1.5公斤/吨,矿区面积20平方公里,矿化垂直厚度从几十至数百米,矿石储量尚待发表.此外,还有相当含量的稀土、金和银.该矿床位于阿得雷德西北约650公里的洛克斯比当斯牧场一带(图1).这里地势平缓,有砂丘和一些粘土盆地,是在上元古代和寒武纪沉积物上发育形成的.     

Some Experiments with Multivariate Objective Analysis Scheme of Heights and Winds Using Optimum Interpolation

A two-dimensional, multitvariate objective analysis scheme for simultaneous analysis of geopotential height and wind fields has been developed over Indian and adjoining region for use in numerical weather prediction. The height-height correlations calculated using daily data of four July months (1976-1979), are used to derive the other autocorrelations and cross-correlations assuming geostropic relationship. A Gaussian function is used to model the autocorrelation function. Since the scheme is multivariate the regression coefficients (weights) are matrix.Near the equator, the geostrophic approximation relating mass and wind is decoupled in a way similar to Bergman (1979). The objective analyses were made over Indian and adjoining region for 850, 700, 500, 300 and 200 hPa levels for the period from 4 July to 8 July 1979, 12 GMT. The analyses obtained using multivariate optimum interpolation scheme depict the synoptic situations satisfactorily. The analyses were also compared with the FGGE analyses (from     

National capital region of India: a case of metropolitan growth management

The author examines the process of urbanization in Delhi, India's National Capital Region. An urban plan for the metropolitan area that emphasizes decentralization is assessed, and the spatial distribution of the population is described. The central city, suburban areas, and transportation and communication systems that link them are also considered.     

Preliminary report on radiocarbon dating of cryptoendolithic microorganisms

The existence of microbial communities living inside desert rocks has been reported by FRIEDMANN et al. (1967, 1976), first in rocks collected from the hot and dry Negev desert and later in rocks in the frigid Ross Desert of Southern Victoria Land, Antarctica. The extremely inhospitable climatic conditions in both places has led to the suggestion that these organisms have very low rates of metabolism and may, in addition, be very old (FRIEDMANN 1982). Our preliminary measurements showed a 14C deficiency indicating a carbon age in the order of magnitude of 10(3) years.     

VGI技术研究进展及其在旅游业的应用

从自发地理信息(VGI)的概念与应用出发,对国内外相关研究中较有代表性的文献进行分析,并从数据的管理理论基础及其对实践活动的积极作用两个方面入手,对VGI技术的管理与应用进行探讨。结果表明:在全球范围内,VGI数据的研究热度不断增加,并主要集中于极具实践意义的两个方面:一是对VGI数据的管理研究,包括对数据的质量评价及高效管理方式的探索;二是在诸如地面信息采集、旅游景观研究、灾害监控预防等维度对VGI数据的应用研究。同时,随着Web技术、GIS技术的成熟以及社交媒体、便携式GPS终端设备的普及,VGI数据将得到更为广泛的应用,并将在旅游业领域扮演日益重要的角色。