东亚金融危机与中国

经历时间长、影响范围广的东亚金融危机是由多方面的原因造成的。它的基础是广泛存在的泡沫经济。金融业的全球一体化,离岸金融中心和金融衍生工具的出现,国际炒家的掀风作浪,加剧了危机的深度。中国由于实质经济比较稳固,对金融业开放持谨慎态度等原因,受到的冲击相对较小。危机给中国敲响了警钟,要求中国尽快进行金融体制的改革。     

黄河北干流晋陕蒙接壤地区环境冲突分析研究

黄河北干流晋陕蒙接壤地区在全国能源工业发展和能源基地建设布局中具有特殊重要的战略地位。但是, 由于富足的能矿资源与干旱、风沙、严重的水土流失等脆弱生态环境并存, 且呈异向关系, 历来生态问题比较突出, 近年来, 随着区内煤炭资源的大量开发和能源基地建设的快速发展,产生了一系列新的环境冲突,成为区域可持续发展的重要障碍。本文对研究区的环境脆弱形势和环境冲突因素进行了初步分析,指出了缓解环境冲突, 促进区域可持续发展的途径。     

磁测资料处理新方法及在危机矿山挖潜中的应用

研究了危机矿山深部找矿的高精度磁测资料处理解释新方法技术:基于三度体数值积分法的三维可视化精细反演, 小波分析方法提取深部弱磁信号,起伏地形下高精度磁测资料快速化平处理的等效偶层法,以及旧资料 换算为 并与新资料对比的综合处理解释等方法。将这些新方法运用于大冶铁矿危机矿山的深部找矿,获得明显的地质效果。2005年根据解释结果在15线布置的钻孔打到了26.65 m厚的磁铁矿体,说明在危机矿山进一步挖潜中,新方法技术的运用是十分必要的。     

周口地区水资源现状及保护措施

分析了地表水与地下水资源盈亏和水污染现状，阐明了水资源面临的危机和水环境恶化的严峻形势；预测了２０００年水资源供需趋势和水环境污染趋势，提出了水资源保护和水污染防治的具体措施和建议。     

危机矿山深边部隐伏矿体立体定量预测研究——以广西大厂锡多金属矿床为例

危机矿山及老矿山深边部具有巨大的资源潜力,但深部潜在资源的寻找面临着巨大的困难和风险,这是由老矿山具有勘探开发程度高、预测评价及找矿向深部三维空间发展、矿山生产对物化探异常信息产生干扰等固有特点所决定的,因此,采用适合危机矿山找矿特点的预测评价新方法,是老矿山深边部资源评价找矿取得突破的重要因素之一.本文针对危机矿山可接替资源的评价和找矿问题,采用数据驱动和知识驱动相结合的方法,确立了隐伏矿体立体定量预测工作的核心流程即"地质数据集成-成矿信息定量提取-立体定量预测".论文从场分析的观点出发,提出和建立了岩浆岩、地层岩性、断层和褶皱控矿作用的场模型以及矿化分布场模型,并通过连续模型的离散化实现了对地质控矿作用场模型的求解.采用统计分析和非线性规划方法,分析了地质控矿作用场与矿化指标之间的关联关系,提取出了地质因素控制矿化富集的定位定量参数,并根据这些参数得到了控矿地质因素定量指标集.基于矿化指标与控矿地质因素指标之间的关系,建立了立体定量预测模型,包括矿化数学模型和含矿性估计模型,对大厂矿区深边部区域进行了隐伏矿体的三维定位定量预测,建立了预测结果数据库,绘制了按标高水平的单元预测图,开发了预测结果可视化查询系统.按照预测结果设计施工的深部找矿钻孔在大厂长坡区深部和铜坑深部区发现了新的隐伏矿体,验证了预测模型及预测结果的有效性.     

咸海危机的起因与解决途径

根据成海国际会议的论文以及近年苏联的资料,并结合笔者的实地考察,本文阐述了咸海危机的因由、后果与解决途径。     

Legume dreams: The contested futures of sustainable plant-based food systems in Europe

With the intensification of agriculture, the simplification of crop rotations, and the rise in demand for meat, dairy and cereal products, legume production and consumption are at an historic low in Europe. But as the environmental consequences of agriculture (biodiversity loss, high greenhouse gas emissions, water pollution) and the health outcomes of modern diets (heart disease, cancer, diabetes, obesity) become better known, so great and varied hopes are being expressed about the future role of legumes in the food system. This paper catalogues and scrutinises these hopes, mapping the promissory narratives now orbiting around legumes. It identifies six food futures, each of which is made possible through the greater use of legumes in various production, processing, marketing and consumption contexts. These promissory narratives are theorised as contrasting responses to three major areas of contestation in the food systems literature. Namely i) the sustainability of livestock management, ii) the role of technology in different visions of the ‘good diet’, and iii) the merits of different models for how to make agricultural management more sustainable. It identifies the promiscuity of legumes – in terms of the range of food futures they permit – before distilling three points of consensus amongst advocates of the potential of legumes. These points of consensus relate to their nitrogen fixing capacity, their high protein content, and their long-standing historical role in the context of European food and farming. This map of legume dreams serves to guide deliberations amongst researchers, policymakers and industry stakeholders about the futures of plant-based food in Europe.     

Regional positioning services as economic and construction activity indicators: the case study of Andalusian Positioning Network (Southern Spain)

The Andalusian Positioning Network (RAP) is a regional GNSS permanent network in Southern Spain that offers two public services for precise positioning: real-time (RAP-Internet Protocol [IP]) and post processing (RAP-File Transfer Protocol [FTP]). Most of the registered users are linked to the construction sector, so the collapse of the housing bubble and the Spanish economic crisis influenced the use of RAP services from 2008. The behaviour of these services has differed somewhat, although analysis for the years 2008–2013 reveals a general decline. Since 2009, the RAP-FTP service demand fell by 50%, but the RAP-IP service was stable until October 2011, when it began a steep decline in December 2012. Analysing the temporal demand and the geospatial connections of RAP-IP with economic impact indicators, we found a high linear correlation between this service and jobs in the construction sector (.98) and permit building (.96). The real-time and associated geoinformation are its main advantages.     

避难国政策影响下的欧洲难民危机时空格局及迁移优化

欧洲是“一带一路”倡议的重点覆盖地域,是亚欧大陆经济走廊的重要组成,维护其地区安全稳定,排除干扰中欧两大市场合作互联的潜在安全隐患,对于“一带一路”倡议的稳固推进十分必要。基于地理学视角,考虑难民安置政策因素,采用灰色关联分析、层次分析、多目标规划等方法对2015-2017年欧洲难民危机时空演变过程及迁移格局优化进行分析。① 时空演化分析显示难民集中于2015年登陆欧洲,欧洲各国登陆难民、接收难民数量极化突出,双重失衡;② 灰色关联分析显示难民迁移决策具有福利优先、收入优先的导向,各国难民政策调整为迁移决策带来不确定性,既有迁移格局难以长期维持;③ 层次分析显示北欧西欧国家难民宜居性较高,东欧南欧国家宜居性相对较差,部分避难国承担安置难民数量与其宜居性不符;④ 多目标规划的优化格局显示,由于欧洲各国忽视全球化背景致使难民政策指向错误,迁移网络更加混乱失衡,优化后来自土耳其、乌克兰的难民迁移趋势向西欧集中,来自希腊、匈牙利的难民迁移趋势在空间上更加平均分散,来自意大利的难民迁移趋势向西欧南欧呈扇形分散。优化后迁移格局有助于缓解地区安全局势、为“一带一路”建设创造良好的政治、经济环境,平衡劳动力资源配置,为建设投资提供潜在市场。最后在研究结果的基础上提出若干协同合作调整难民迁移格局的危机缓解措施。     

Large-eddy simulation of the flow past a circular cylinder at sub- to super-critical Reynolds numbers

Large-eddy simulation of turbulent flow past a circular cylinder at sub- to super-critical Reynolds numbers is performed using a high-fidelity orthogonal curvilinear grid solver. Verification studies investigate the effects of grid resolution, aspect ratio and convection scheme. Monotonic convergence is achieved in grid convergence studies. Validation studies use all available experimental benchmark data. Although the grids are relatively large and fine enough for sufficiently resolved turbulence near the cylinder, the grid uncertainties are large indicating the need for even finer grids. Large aspect ratio is required for sub-critical Reynolds number cases, whereas small aspect ratio is sufficient for critical and super-critical Reynolds number cases. All the experimental trends were predicted with reasonable accuracy, in consideration the large facility bias, age of most of the data, and differences between experimental and computational setup in particular free stream turbulence and roughness. The largest errors were for under prediction of turbulence separation.