The Fuzzy Synthesizing Evaluation of City''''s Environmental Quality Based on GIOWA Operator:A Case of 13 Cities of Jiangsu Province

1 INTRODUCTION In China, cities have been undergoing a rapid development in recent years. On the one hand, the level of urbanization rises continuously and a large population gathers in a city. The number and the scale of city increase and enlarge continuously. On the other hand, large population gathering in a city brings a huge pressure to the ecological environment of the city. The environmental pollution of the city is becoming more serious. This is a terrible and heavy cost for city…     

二氧化碳灭火系统误喷事故分析及预防措施探讨

根据二氧化碳灭火系统在工程中的实际应用,系统分析灭火系统误喷事故原因,建立引起二氧化碳灭火系统误喷事故树。通过事故树计算各基本事件的结构重要度,确定基本事件对误喷事故产生的影响程度,最后为防止误喷事故发生制定了预防措施。     

2013年11月23日山东莱州4.6级地震序列初步分析

2013年11月23日山东省莱州市发生Ms4.6级地震,该地震发生在沂沭断裂带东侧.该地震序列类型为主余型,但是地震序列的h值小于1.根据地震的等震线长轴、震源机制解和地质资料分析认为发震断层呈NE向.该地震打破了华北地区6个月的ML4级地震平静,可能预示着华北地区中强地震活动复苏,拉开华北地区中强地震活动序幕,对华北地区6级地震具有指示意义.此外,该地震是1995年苍山Ms5.2级地震后,山东内陆地区发生的最大地震,引起了广泛的政府和社会关注,具有重要的社会影响.     

Emission factors of polycyclic aromatic hydrocarbons from domestic coal combustion in China

Domestic coal stove is widely used in China, especially for countryside during heating period of winter, and polycyclic aromatic hydrocarbons （PAHs） are important in flue gas of the stove. By using dilution tunnel system, samples of both gaseous and particulate phases from domestic coal combustion were collected and 18 PAH species were analyzed by GC-MS. The average emission factors of total 18 PAH species was 171.73 mg/kg, ranging from 140.75 to 229.11 mg/kg for bituminous coals, while was 93.98 mg/kg, ranging from 58.48 to 129.47 mg/kg for anthracite coals. PAHs in gaseous phases occupied 95% of the total of PAHs emission of coal combustion. In particulate phase, 3-ring and 4- ring PAHs were the main components, accounting for 80% of the total particulate PAHs. The total toxicity potency evaluated by benzo[a]pyrene-equivalent carcinogenic power, sum of 7 carcinogenic PAH components and 2,3,7,8-tetrachlorodibenzodioxin had a similar tendency. And as a result, the toxic potential of bituminous coal was higher than that of anthracite coal. Efficient emission control should be conducted to reduce PAH emissions in order to protect ecosystem and human health.     

Humic acid transport in saturated porous media: Influence of flow velocity and influent concentration

Understanding the transport of humic acids（HAs） in porous media can provide important and practical evidence needed for accurate prediction of organic/inorganic contaminant transport in different environmental media and interfaces. A series of column transport experiments was conducted to evaluate the transport of HA in different porous media at different flow velocities and influent HA concentrations. Low flow velocity and influent concentration were found to favor the adsorption and deposition of HA onto sand grains packed into columns and to give higher equilibrium distribution coefficients and deposition rate coefficients, which resulted in an increased fraction of HA being retained in columns.Consequently, retardation factors were increased and the transport of HA through the columns was delayed. These results suggest that the transport of HA in porous media is primarily controlled by the attachment of HA to the solid matrix. Accordingly, this attachment should be considered in studies of HA behavior in porous media.     

蕹菜镉积累典型品种的根际土壤酶研究

通过在镉含量高、低不同的2种土壤上的自制根箱试验并对所种植作物的镉含量进行相关性分析,研究了两种蕹菜镉积累典型品种,强坤柳叶白骨（QK,Cd-PSC）和台湾308纯白柳叶（T-308,非Cd-PSC）的根际土壤酶区系.结果表明：品种间茎叶镉含量差异极显著;在高镉条件下,蕹菜茎叶Cd含量与根际转化酶活性呈显著正相关;在低镉条件下,与根际碱性磷酸酶活性呈显著负相关.     

磨盘山水库水质污染现状特征及防治措施研究

饮用水安全关系到千百万人民群众的身体健康,保证饮用水安全、确保人民群众身体健康是＂建设和谐社会、实现人与自然和谐以及经济社会全面、协调和可持续发展＂的头等大事。磨盘山水库是哈尔滨市居民饮用水源地。本文通过分析哈尔滨市磨盘山水库水质现状,评定出磨盘山水库的富营养化状态处于中营养状态,提出了磨盘山水源地当前存在的环境问题,并提出了相应的污染防治措施。最后给出结论,对水库进行污染防治是必要的,具有一定的社会、政治和环境效益。     

构建重点企业清洁生产监管信息平台系统功能的探讨

清洁生产是实现可持续发展的必由之路,建设重点企业清洁生产监管信息乎台是有效推行清洁生产的重要环节。根据国内外推行清洁生产的发展趋势,建设重点企业清洁生产监管信息平台意义重大而深远。根据目前环保部清洁生产管理工作需要,确定了系统设计目标,对系统的功能模块进行了初步研究,从实用、高效、前瞻性角度构建重点企业清洁生产监管信息平台系统进行了探讨。     

抗污净化减噪植物在石化生产厂区选择性种植的探索

从石油石化生产厂区抗污减噪植物选择性种植入手,根据工厂的总平面布置、生产特点、污染性质及程度,以及所要达到的绿化效果,确定各类植物的比例与配置方式,从而达到调节小气候、降污减污,净化环境,减少噪声污染等生态功能。     

黄河水质监测的分析方法研究

随着对黄河水的治理工作的逐渐深入,关于黄河水质的监测事业都取得了快速的发展并有着不小的进步,当然仍然存在着一些问题,比如监测的条件较为单一且技术落后、监测的断面也不够多、资料信息缺乏等.随着时代的发展,现有的一些关于水质监测的方法已经不能满足监测的要求,所以本文对于黄河水质监测的分析方法做了一定得研究,希望对于水质监测方面有一定的帮助.