Analysis of the influencing factors of PAEs volatilization from typical plastic products

The primary emphasis of this research was to investigate the foundations of phthalate(PAEs) pollutant source researches and then firstly confirmed the concept of the coefficient of volatile strength, namely phthalate total content in per unit mass and unit surface area of pollutant sources. Through surveying and evaluating the coefficient of volatile strength of PAEs from typical plastic products, this research carried out reasonable classification of PAEs pollutant sources into three categories and then investigated the relationship amongst the coefficient of volatile strength as well as other environmental factors and the concentration level of total PAEs in indoor air measured in environment chambers.Research obtained phthalate concentration results under different temperature, humidity,the coefficient of volatile strength and the closed time through the chamber experiment. In addition, this study further explored the correlation and ratio of influencing factors that affect the concentration level of total PAEs in environment chambers, including environmental factors, the coefficient of volatile strengths of PAEs and contents of total PAEs in plastic products. The research created an improved database system of phthalate the coefficient of volatile strengths of each type of plastic goods, and tentatively revealed that the volatile patterns of PAEs from different typical plastic goods, finally confirmed that the coefficient of volatile strengths of PAEs is a major factor that affects the indoor air total PAEs concentration, which laid a solid foundation for further establishing the volatile equation of PAEs from plastic products.     

安钢冶炼系统工伤事故统计与分析

安阳钢铁集团公司工伤事故统计分析表明，冶炼系统是发生事故较多的系统，各类工伤事故约占事故总数的38％。冶炼系统中，第二炼钢厂是安钢集团公司核心单位，工伤事故特点具有一定代表性。对该厂近10年工伤事故进行了统计分析，总结了事故规律，提出了加强和改进工作的建议和措施，对搞好钢铁冶炼的安全生产具有指导意义。     

控制爆破拆除工程中的安全管理

控制爆破拆除工程是一项危险性极高的工作,因此对工程从设计到施工进行全过程的安全管理是十分重要的。以《爆破安全规程》为基础,提出了一套行之有效的安全管理方法,并通过实例对该安全管理方法的实施作了详细论述。     

物理污染及其对人类的危害

本文从噪声、放射性和电磁辐射三个方面对物理性污染的来源及其危害作了详尽的阐述，指出了物理性污染的形成及其诱发疾病的常见症状，提醒人们在日常生活中注意对物理性污染的防范。     

燃油锅炉噪声控制设计

为改善大气质量环境,多数城市市区淘汰了小型燃煤锅炉,以集中供热或燃油锅炉取而代之,由于燃油锅炉多安装在机关小院或居民小区内,运行中辐射较强的噪声,影响人们的工作和生活,必须加以控制。针对燃油锅炉噪声频谱特性进行分析,提出合理的治理措施,并通过工程实施验证了设计方案的正确性,给燃油锅炉噪声控制提供了可借鉴的经验。     

四川省农用土地资源卫星遥感宏观监测技术方法研究

通过对土地利用类型区的分层技术、卫星遥感抽样技术、样方调查方法、数据库建立、数据汇总与外推方法、数理统计分析与精度评估等６个专题的重点研究，探索出一套四川省农用土地利用现状卫星遥感抽样调查与监测的技术方法。该技术方法实用性和可操作性较强，已在四川省实施应用，完成了１∶１０万农用土地利用现状抽样调查。土地利用类型区分为７个层２５个亚层，抽样数为１１８个，样方大小为１０ｋｍ×１０ｋｍ（即１００ｋm₂），实际抽样率为２．０％。应用结果表明：在合理分层的基础上，采用卫星遥感抽样与地理信息系统相结合的方法，能满足土地利用现状宏观调查与监测的精度要求。     

大学英语作文中的词语搭配错误分析

本文主要采用错误分析的研究方法对大学英语专业一年级学生的英语作文中的词语搭配现象进行分析、探讨，试图对英语学习者写作过程中出现的搭配性错误进行归类，探其成园，并据此对英谔搭配教学提出建议。     

渤海湾西岸入海径流量和输沙量的变化及其环境效应

以渤海湾西岸天津段入海河流的径流量和输沙量数据为基础,采用Kendall秩相关检验法和Mann-Kendall法对近50年入海径流量和输沙量进行了趋势分析和突变性检验.结果表明,近50年来渤海湾西岸天津段入海径流量和输沙量均呈显著下降的趋势.近50年来华北地区降水量减少、天然径流偏低是导致入海径流量减少的自然因素,而流域人类活动如水库和防潮闸的建设,以及沿河取水取沙也是不可忽视的重要因素.该段海岸入海径流量和输沙量的减少已导致河口区盐度上升、水质恶化、沉积物污染等问题,最终会影响河口生态系统的结构和生物资源的可持续发展与利用.     

Research on low emission MSW gasification and melting system

In order to eliminate secondary pollution caused by municipal solid waste (MSW) incineration, a MSW gasification and melting process is proposed. The process is expected to reduce the emission of pollutants, especially heavy-metals and dioxins. In this paper, the combustible components of MSW and simulated MSW were gasified in a lab-scale fluidized bed at 400°C–700°C when the excess air ratio (ER) was between 0.2 and 0.8. The experimental results indicated that the MSW could be gasified effectively in a fluidized bed at approximately 600°C–700°C when excess air ratio was 0.2–0.4. The melting characteristics of two typical fly ash samples from MSW incinerators were investigated. The results indicated that fly ash of pure MSW incineration could be melted at approximately 1,300°C and that of MSW and coal co-combustion could be melted at approximately 1,400°C. When temperature was over 1,100°C, more than 99.9% of the dioxins could be decomposed and most of the heavy-metals could be solidified in the slag. Based on the above experiments, two feasible MSW gasification and melting processes were proposed for low calorific value MSW: (1) sieved MSW gasification and melting system, which was based on an idea of multi-recycle; (2) gasification and melting scheme of MSW adding coal as assistant fuel.     

面向问题的自然灾害监测与评估集成系统研究

本文描述具体应用在诸如洪水、林火、地震、雪灾、旱灾、虫害等重大自然灾害遥感监测与评估的面向问题的地理信息专题系统。简称灾害集成系统。该系统运行在ＵＮＩＸ平台上，采用面向要素的数据模型，用广义的关系数据库系统实现空间数据和非空间数据的存储管理。