Using radar direct wave for concrete condition assessment: Correlation with electrical resistivity

This paper demonstrates that the direct wave of a radar ground-coupled antenna may be used for the nondestructive assessment of the physical condition of concrete, which directly influences the corrosion of the reinforcing bars in the structure. The validity of this method was evaluated by a comparison with the electrical resistivity method, which is frequently used for the evaluation of corrosion probability. Both methods were implemented in the laboratory on 72 concrete samples (25 × 25 × 8 cm³) with various degrees of saturation and chloride contamination levels. On-site investigations were also carried out on the concrete slab (1080 m²) of a car-park.The results of the laboratory tests show that the radar direct signal is strongly affected by variations in concrete moisture and chloride contamination level. The tests performed in real conditions confirm the good correlation between radar direct wave attenuation and electrical resistivity and, thus, the aptitude of the radar direct wave to detect concrete conditions leading to reinforcement corrosion.     

西部开发过程中土地利用控制的必要性及措施

从西部开发的历史经验与教训、土地利用的不合理现状等方面，阐述国家在实施西部地区大开发战略中加强土地利用控制的必要性及其重要意义。在此基础上，提出土地利用控制的目标与任务。分析了对西部经济发展、自然生态环境建设与保护等密切相关的耕地、林地和草地等在土地利用与控制中存在的问题，进而提出相应的土地利用控制措施与对策。     

天时、气候与中国历史(Ⅰ):太阳黑子周长与中国气候

依据太阳黑子周期长度 (SCL)资料 ,将过去 2 5 0 0年分为“好天时代”(SCL <11年 )和“坏天时代”(SCL >11年 ) ,发现在“坏天时代”中国旱灾频率显著高于“好天时代”。“好 (坏 )天世纪”与气候暖(冷 )期有好的对应 ;并提出了太阳活动影响气候的过程链     

测震学多项指标综合预测概率分析

通过对测震学各单项指标的预测效能调研，为进一步提取前兆信息，选择了7项测震学指标：频次、地震蠕变、6值、缺震、η值、GL值和调制比，进行综合概率分析。7项指标对关注地区的全时空扫描并考虑了空间单元异常与中强震地点对应的模糊关系，得到指标在各空间单元异常后发生中强震的条件概率。根据历史上每个单项指标的预报效能求计算综合概率时的指标权重，按贝叶斯定律得到相应不同指标在不同时间窗和不同空间单元时中强震发生的加权综合概率。计算结果（1970年以来）表明，对华北地区和川滇地区这一综合概率方法预测效能的R值评估超过0.5。     

柴达木资源开发中的几个问题探讨

重点探讨了与柴达木资源开发相关的五个问题。一是柴达木在青海发展和西部地区资源开发中的地位和作用问题 ;二是格尔木市发展中的几个问题 ,重点探讨了格尔木的城市性质 ,格尔木在国家资源安全中的作用和格尔木进一步发展的问题 ;三是讨论了西部大开发中 ,资源的地位和作用问题 ;四是讨论了投资补偿理论和柴达木盆地矿业城市可持续发展问题 ;最后探讨了柴达木资源综合利用和工业可持续发展问题     

我国西部开发中生态环境保护及其对策

西部地区生态环境脆弱 ,在实施西部开发战略中如何保护和优化生态环境显得尤为重要。在分析西部地区存在的生态环境问题的基础上 ,提出了适度调整资源开发导向战略 ;科技先行 ,强化生态环境建设 ;调整产业结构 ,加快城市化进程 ;制定合理的政策 ,加强环境立法、执法等对策和建议 ,保护和优化生态环境     

Globalisation, Regionalisation and Local Voices: The Asian Development Bank and Rescaled Politics of Environment in the Mekong Region

Globalisation is manifested in the Mekong Region both through processes and discourses that reflect the ideology of a borderless world allowing easy passage of capital and commodities, and through resistance to such processes in an increasingly transnationalised civil society movement. However, more immediately significant supranational integrative agendas take the form of regionalisation, a process that has received less attention but which raises analogous concerns of re-scaled governance. The Asian Development Bank (ADB) has been a catalysing force for regionalisation amidst a host of regional processes and initiatives; as such it has found itself the object of critique as an institution and through the specific projects it has supported that have impacted on local communities and ecosystems. Meanwhile, local and NGO voices associated with the emergence of a vibrant civil society in Thailand and nascent civil society responses in neighbouring countries have challenged claims on resources made in the name of national development and regional integration.
This paper considers some key issues of re-scaling resource and environmental politics in the Mekong Region, and the extent to which challenges have been recast from national to regional development agendas. Politics of environment are shown to exist as a general rather than exceptional response to the region's development direction, and it is suggested that equitable and sustainable development increasingly needs to address simultaneously the re-scaling and reconfigurations of power in both environmental politics and the "infrapolitics" of environment. The paper is illustrated with case studies of dams in Laos and Thailand.     

金沙江流域（云南段）砂金成因类型及其找矿前景

根据成矿作用、成矿环境及矿床特征，金沙江流域（云南段）砂金矿床，可划分为：残坡积、洪积、冲洪积、冲积和冰碛等五种类型。成矿主要受碰撞带、深大断裂、大断裂及其派生断裂、基底岩石、地貌、水质和水化学环境等综合控制。以巨甸－大具及中江街－金江街两片区最具有找矿前景。     

成矿预测研究现状及发展趋势

随着地表露头矿，易识别矿越来越少，找矿难度越来越大。GIS高新技术普及应用，为成矿预测展示了新的前景。本文通过成矿预测发展历史的回顾，概述今后一段时期地勘行业成矿预测的主要思路：在新的成矿理论指导下，借助GIS技术，实现科学化，系统化，信息化，动态化和可视化多源信息综合预测找矿，为普查立项提供依据，并提出了具体工作步骤。     

浏阳市旅游资源概况及其开发建议

本文介绍了注浏阳市主要的旅游资源，并对境内旅游资源开发的优势条件进行了分析，在此基础上提出了开发的建议。