城市群相对效率下的广西北部湾经济区城市理性利用DEA评价

本文根据2008年国内4大城市群18个城市的横向数据,利用DEA方法对广西北部湾经济区城市理性利用进行实证研究,针对存在的问题提出了广西北部湾经济区城市理性发展对策,并对非DEA有效的北海市和防城港市进行投影分析,提出了调控方向。     

另类视角的国有股转持政策问题研究

被业界称为＂一石三鸟且重大利好＂的国有股转持政策体现了以行政为主导的部门利益分配,表面调和了部门矛盾但却难以真正实现各利益主体的协调运作,隐含着证券市场是一个相对边缘化的市场,并且社保基金作为财务投资者改善上市公司的法人治理结构难度极大,国有创投遭遇进退维谷的两难困境。长期来看,国有股转持是证券市场的利空措施,而当务之急是尽快出台国有股转持的配套细则。     

数据包络分析有效性理论的一点探索

文章给出经典的基于输入的和基于输出的数据包络分析(DEA)模型,以及把基于输入和基于输出的模型相结合的相对效率模型,并且把这些模型引用到评价证券的相对有效性上,以风险作为输入,期望收益率作为输出,便可以用DEA模型评价每只证券的相对有效性.     

微纳卫星组网星间链路设计及关键技术分析

微纳卫星组网应用可大幅度提高航天装备的能力,较单颗大卫星具有明显的优势。首先,介绍了国内外微纳卫星组网的研究情况,以组网侦察应用为例分析了星间测量与通信链路的技术需求,并进行了系统架构和体制设计;其次,在星座设计基础上开展系统仿真,并提出了一体化设备实现方案;最后,分析了微纳卫星组网系统中几项重要的关键技术及其解决方案,对系统的设计和工程实现具有参考价值。     

盘石头水库河槽段趾板基岩的地质概况与防渗设计分析

盘石头水库河槽段趾板基岩建基面下8m为相对不透水层,如按常规进入不透水层5m设计帷幕,深度只有13m左右,对100m高坝而言,深度偏浅,为安全考虑,帷幕设计为悬挂式帷幕,主帷幕深度按1/3坝高考虑,穿透隔水层,隔水层以上以一排主帷幕和两排副帷幕防渗,隔水层以下以一排主帷幕防渗。     

中国创意服务贸易国际竞争力比较研究——基于TC指数和相对(技术)复杂度指数

在分析中国创意服务贸易特征的基础上,运用贸易竞争力(TC)指数和相对(技术)复杂度指数,采用UNCTAD发布的最新统计数据,对中国以及世界其他五个国家的创意服务贸易的国际竞争力进行了比较研究。结果显示:我国创意服务贸易已具备一定的国际竞争力,在世界创意服务贸易的地位也不断提升,但是各分项发展很不平衡。因此,要加强对进出口市场的了解,优化出口结构,提高创意服务进口的技术水平,同时注重创意服务高端人才的培养与引进。     

Determinants of Intra-GCC Food Trade

Using panel data for six Gulf Cooperation Council (GCC) countries from 1995–2014, we assess the impacts of several major economic variables on intra-GCC food exports, and on GCC food exports to the world. The GCC customs union had minimal impact on intra-GCC food exports, but occasioned a significant reduction in GCC food exports. Unlike GCC food exports, intra-GCC food exports occurred among countries with similar relative factor endowments, in agreement with the Linder Hypothesis. Rising incomes and exchange rates played significant roles in both intra-GCC food exports and GCC food exports, while distance has lost its once-dominant role.     

Reconsidering Media Discourses on Food Crisis from a Quantitative Perspective

In 2007–2008, when food prices started to increase dramatically, purchasing power parity of consumers, especially the urban poor, started to decrease automatically. High food prices were argued to cause poverty, hunger, and food riots among urban populations. Henceforward, “food crisis” became a new storyline in the current debate. In contrast, in the pre-2007 period, when rural farmers had been facing negative welfare effects of low food prices for many years, there were no crisis talks. This article analyzes different media coverage of urban consumers and rural producers under changes in relative incomes for the 2000–2013 period and propounds media bias on the food crisis debate by using content analysis and the OLS regression model.     

一种机载三维音频技术的快速计算方法

针对机载三维音频应用的实时性需求,提出了一种基于单耳相对头相关传递函数和改进型混响模型的机载三维音频快速实现方法,在较传统实现方式性能无明显下降的情况下降低了80%的计算量。对提出的算法在F-16战斗机模拟强噪声环境下进行相关主观试听实验,同时在某型飞机音频系统中实验验证。实验结果表明,所提方法在实时处理3路三维音频时,三维音频方位分辨精度在5°以内,可满足实际机载平台使用需求。     

The contribution of social tourism to sustainable tourism: a case study of seasonally adjusted programmes in Spain

Recent policy from the European Union has attempted to justify social tourism initiatives on the basis that they lead to a more sustainable tourism industry. However, the majority of latest research in the field has been focused on the benefits for participants, with the addition of some evidence on the economic impacts of such programmes on destinations, which have pointed towards sustainability outcomes including: a longer tourism season, more even spread of demand, and longer periods of employment for tourism workers. Yet there is a lack of direct evidence linking such programme to these outcomes. This paper aimed to explore this important disconnect between policy assumptions and evidence-based outcomes through an analysis of the deseasonalising effects of the Spanish social tourism programme for older people. The research found that this programme does have an effect on the seasonal nature of employment and economic activity in most regions studied, but that the huge volume of demand from international tourists in the high seasons masks the quantitative effects in the regions with the highest seasonal concentration of international tourists. Recommendations for policy and practice in sustainable tourism are made that are transferable to many countries and regions that adopt social tourism programmes.