A Research for Regional Contribution Rate of Internal Source and External Source of PM_(2.5) Based on Set Pair Analysis Method

A problem of the air pollution control in China is getting to know a regional contribution rate of internal and external source of PM2.5. In this paper,Set Pair Analysis（ SPA） method is proposed to calculate the contribution rate of PM2.5in Dongguan City. Due to geographic,meteorological factors and the low concentration of air pollutants in Qingxi area,the PM2.5in this place is mainly contributed by the regional transport of air pollutants from other inside areas of Dongguan,and less affected by the outside of Dongguan. So the concentration of PM2.5in Qingxi area can reflect the Dongguan＇s basic background concentration of PM2.5. On the basis of the basic background concentration,firstly the concentration of each pollutant components is divided into the internal part and the mixed part. Secondly using the source apportionment samples of five monitoring sites in Dongguan we can respectively construct a sample set A and an evaluation set B. Thirdly the SPA is operated onto the mixed part in terms of set B.At last the connection degree between the concentration of each pollutant components and external source and internal source will be calculated,that is the contribution rate. The research reveals that the contribution rate of internal source and external source of PM2.5in Dongguan City is 83%and 17% respectively,which roughly met expectations. This method is simple and effective and it can provide a reference for the government taking reduction measures to control PM2.5pollutants emission.

江西省旅游产业对地区经济贡献的实证研究

江西旅游业对地区经济发展贡献日渐提高,但是否可定位为支柱产业,需要客观地评价旅游产业的经济贡献。以支柱产业的经济贡献标准为出发点,用产业增加值占GDP比重、需求收入弹性、就业容量、行业关联度四个指标构建旅游产业经济贡献评价体系,并对江西省旅游产业经济贡献进行实证分析结论:目前江西省旅游产业宜定位为"准支柱产业"来培育。

需求侧资源促进可再生能源消纳贡献度综合评价体系

通过需求侧资源促进可再生能源并网消纳,能够降低系统对燃煤备用机组和输电线路扩容的需求,具有显著的经济、环保效益。考虑到系统动力学系统性、动态性的特点,构建了基于系统动力学的需求侧资源贡献度的综合评价体系。首先,分析了需求侧资源促进可再生能源并网消纳的驱动关系;然后,构建了需求侧资源促进可再生能源并网消纳贡献度的测算栈流图,具体包括分布式发电优化负荷预测测算环节、提高供电可靠性测算环节、发电组合经济性测算环节、可再生能源消纳因子构建环节、可再生能源消纳贡献度测算环节;最后,提出了需求侧资源促进可再生能源并网消纳贡献度综合评价体系建设工作建议。

区域PM_(2.5)内源外源贡献率的集对分析研究

判断某一地区PM_(2.5)来自内源和外源的比例,是大气污染防治的重要问题。该文以东莞市为例,构建了计算区域PM_(2.5)内源外源贡献率的集对分析方法。清溪地区自身的污染排放少,污染物浓度低;又由于地理、气象等原因,该地PM_(2.5)浓度主要由东莞其他地区污染物传输贡献,受东莞市以外地区影响较小,故清溪站PM_(2.5)浓度能基本反映东莞PM_(2.5)的本底浓度。依据本底浓度,把各污染物组分的浓度分为内源段和内外源混合段后,利用东莞5个监测站点源解析样本可分别构造样本集合A与评价等级集合B。根据B集合对混合段的数据进行集对分析,求出各站点污染物组分的浓度与内源、外源的联系度,即贡献比例。研究表明,内源外源对东莞PM_(2.5)的贡献比例分别为83%和17%,大致符合预期。此法简单有效,为政府控制PM_(2.5)制定污染物减排措施提供参考。

复杂网络交叠团模糊分析与信息挖掘

针对复杂网络交叠团的聚类与模糊分析方法设计问题,给出一种新的模糊度量及相应的模糊聚类方法,并以新度量为基础,设计出两种挖掘网络模糊拓扑特征的新指标:团间连接紧密程度和模糊点对交叠团的连接贡献度,并将其用于网络交叠模块拓扑结构宏观分析和团间关键点提取。实验结果表明,使用该聚类与分析方法不仅可以获得模糊团结构,而且能够揭示出新的网络特征。该方法为复杂网络聚类后分析提供了新的视角。