非常规思维方法在数学中的应用

在数学解题中除了要重视常规的解题思想方法外,也应注重非常规思维方法的训练,这样做可以培养学生求异创新的精神,也是克服思维定势、发展发散思维的一种好方法或有效途径。本文以微积分内容为例,从五个方面介绍了非常规思维方法在数学解题中的应用。     

城市可持续发展与城市安全体系

城市是人口、产业、财富高度聚集的地区,是现代经济社会活动最集中、最活跃的核心地域,是现代社会生活和生产的主要场所。随着我国城市化水平的逐步提高,城市的规模与数量都在快速增长,城市所聚集的人口和积累的财富使城市的重要性日趋明显,城市的特殊功能使其成为国家防灾、减灾的中心和重点;建立集政策、法规、技术、管理于一体的城市安全系统,对于增强城市安全保障能力,应付意外事故及突发自然灾害,具有重要意义。     

基于群体协同的突发公共事件应急管理研究

群体协同能形成高于个体线性和的效应,为提高应急管理水平提供思路和方向。文章结合危机事件的特点,分析了应急管理群体协同的动因,并通过该视角多角度的提出应急管理对策及建议。     

加强国际合作推动非常规天然气开发

“十二五”时期是我国非常规天然气开发迎来快速发展的关键阶段。从加强国际合作的视角,以致密气、高含硫气、页岩气、煤层气、天然气水合物等非常规天然气为研究对象,重点分析了非常规天然气开发面临的主要问题,包括资源情况、开发难点、国际合作开发的必要性与合作现状、配套政策体系等,提出了解决问题的可行性建议与思路。     

军队应对非常规突发事件资源协调优化研究

着眼军队应对非常规突发事件及其对资源保障体系的新要求,从军队应对非常规突发事件的角度,研究了军队应对非常规突发事件资源保障体系设计内容,分析了资源优化模型设计并给出了软件原型设计思路。     

Exchange rates,central bank news and the zero lower bound*

The zero lower bound (ZLB) may restrict the responsiveness of exchange rates to news. A proxy for central bank communication is added as a determinant in a model of exchange rate movements. Two reserve currencies, the British pound and euro, and two currencies of small open economies, the Canadian dollar and Swedish krona, are examined. Reserve currencies are more vulnerable to the ZLB constraint, while the currencies of small open economies become more responsive to foreign central bank announcements. Certain unconventional monetary policy announcements were found to significantly impact exchange rates at the ZLB.     

我国海水淡化产业区域发展特点及建议

基于我国海水淡化产业发展现状,分析环渤海、长三角和泛珠三角沿海地区海水淡化产业发展的特点和存在问题;针对各区域规模化发展的态势,综合考虑区域布局、产业发展等因素,从淡化水进市政管网、品牌建设、海岛分类示范等方面对我国海水淡化产业区域发展提出了发展建议。     

Local economic impacts of an unconventional energy boom: the coal seam gas industry in Australia

Complementing the scarce economic literature about local impacts of energy extraction booms, this paper empirically investigates economic outcomes related to the new coal seam gas (CSG) industry located across southern Queensland. This Australian state has seen an unprecedented inflow of investments into the extraction of this previously unexploited unconventional natural gas over the last decade. We analyse census data to study income and employment effects associated with the CSG boom, exploiting the quasi‐experimental conditions provided by CSG extraction areas (treatment regions) and regions without this development (control regions). Findings show that treatment regions have higher income growth than control areas during 2001–2011 for families residing locally and for individuals present on census night. Employment in the mining sector also shows higher growth as has non‐mining employment in some areas. We include comparisons between CSG areas with no major mining history (the Surat basin) and CSG areas where mining was important before the CSG boom (the Bowen basin), to better understand boom effects in areas with different initial mining industry importance in their economies. Local job multipliers are also analysed for Surat basin CSG areas, where positive impacts (job spillovers) are restricted to construction and professional services jobs, while agricultural jobs have decreased.     

基于物元可拓的军地协同处置重大突发事件应急管理

为解决重大突发事件应急管理能力评价问题,将军队和地方政府协同处置重大突发事件作为研究对象,根据应急管理全生命周期的发展阶段,建立能力评价指标体系。再将熵权法和物元可拓学理论运用于军地协同处置重大突发事件应急管理能力评价模型。然后将上海、深圳、天津、成都、昆明的相关数据代入模型并计算。结果表明,上海和成都军地协同处置重大突发事件应急管理能力较其他城市更具有优势,并由爬虫数据验证该模型的可靠性和计算结果的准确性。最后从应急准备、组织协调、应急响应、应急保障、灾后重建5个方面提出建议,以期为当地军地应急管理建设做出贡献。     

ECB monetary policy and commodity prices

We assess the impact of ECB monetary policy on global aggregate and sectoral commodity prices over 2001–2019. We employ an SVAR model and separately assess periods before and after the global financial crisis. Our key results indicate that contractionary monetary policy shocks have positive effects on commodity prices during both conventional and unconventional monetary policy periods, indicating the effectiveness of unconventional monetary policy tools. The largest impact is documented on energy (fuel) and food commodities. Our results also suggest that the effect of ECB monetary policy on commodity prices transmits through the exchange rate channel, which influences European market demand.