刚果(布)国家1号公路边坡防护设计

研究目的:结合刚果(布)国家1号公路的边坡设计与施工,阐述工程边坡防护形式及发达国家边坡生态防护的理念和一些基本做法,并对边坡开挖过程中出现的病害提出了处理措施,希望能为我国工程设计人员提供有益的借鉴。研究结论:边坡生态防护是工程建设的重要内容之一,防护工程应树立"尊重自然、恢复自然"的理念;边坡生态防护形式需根据气候、水文、地形、土质、材料来源等情况综合考虑,因地制宜,合理布局;边坡生态防护需与周围环境相协调,即保持生态环境的相对平衡,又能起到美化的作用。     

南疆铁路吐鱼段风沙活动规律研究

通过对南疆铁路吐鱼段戈壁大风区风沙流进行现场观测研究,得出该地区大风显现明显的季节性变化,每年的春季是大风高发季节,年平均大风日数高达136d。大风携沙量的垂直分布十分明显,集沙量与高度显现e的负指数变化,高度越高集沙量越小;2m以下区域是风沙灾害防护的重点区域,其大风携沙量占总携沙量的96%左右。沙粒颗分试验结果表明,戈壁风沙运动存在较明显的分层现象,沙粒粒径以0.1~0.25mm为主。     

The Prince Edward Islands pelagic ecosystem, south Indian Ocean: a review of achievements, 1976–1990

This review summarizes the main research findings of the multi-year oceanographic and biological studies conducted in the vicinity of the Prince Edward Archipelago during the period 1976 to 1990. The Prince Edward Islands represent a flow-through system on the mainstream of the Antarctic Circumpolar Current. Although there are no taxonomic differences between the pelagic communities of the upstream, inter-island and downstream regions, these mesoscale subsystems may operate differently. The mesoscale oceanographic and biological processes appear to be affected by the position of the Subantarctic Front (SAF) in the vicinity of the islands. Both the rich benthic community, which is supported by the local enhancement of primary production, and the strong advection of zooplankton/micronekton from the upstream region provide the food resources necessary for the survival of the huge community of land-based predators present on the islands. Collectively this is termed the ‘life-support system'. Future studies should concentrate on the meridional shifts in the position of the SAF and its influence on background productivity upstream and downstream of the Prince Edward Archipelago.     

城市群城际客运空间联系分布特征研究——以苏南地区为例

作者运用熵值反映系统差异程度的特点,提出客流分布熵的概念,并用以分析地区客流空间分布的均衡性;利用集中度、运输联系强度以及空间断裂点方法,分析空间运输联系的分布特征.以苏南地区为例,对分析方法和模型运用进行实证.结果表明:苏南地区城际客运空间联系具有双中心的特点,中心城市指向性较明显,且空间客流分布具有不均衡性.     

尖锐湿疣中人乳头瘤病毒DNA检测及存在情况初探

尖锐湿疣的发病与人乳头瘤病毒密切相关。本文用打点杂交法检测了28例尖锐湿疣病理标本,其中14例与HPV-11探针杂交阳性,阳性率50%(14/28)。对其中杂交信号较强的9例进一步分别用BamI Ⅱ、PstI酶解,Southem转印后与HPV-11探针杂交,对病毒DNA存在形式进行分析,结果证实HPV-11在尖锐湿疣细胞中主要以游离形式存在。