水上溢油鉴别体系的研究

溢油鉴别是溢油事故调查处理的重要取证手段,文章介绍了国内外溢油鉴别体系及最新溢油鉴别方法研究情况,对国内主要鉴别方法的特点进行了对比.认为应把这些单一的、孤立的溢油鉴别技术和数据信息处理技术发展成系统的、快速的、能够实现计算机自动比对的、支持溢油应急决策的集成化技术.     

4株邻苯二甲酸二丁酯降解菌的分离鉴定及其相关降解基因的克隆

从土壤中分离纯化出4株能降解邻苯二甲酸二丁酯(DBP)的菌株,分别命名为JDC-1、JDC-8、JDC-9、JDC-12,并对其进行了形态学、生理生化及分子生物学鉴定.菌株革兰氏染色阳性,16S rDNA序列分析显示4株菌均与节杆菌属(Arthrobacter sp.)有99%以上的序列相似性,初步判断这4株菌为Arthrobacter sp..通过PCR扩增及克隆,均获得了1个约900 bp的DNA片段,测序结果显示该片段与Arthrobacter keyseri的邻苯二甲酸3,4-双加氧酶基因的核苷酸序列相似性为96%以上.对4株菌的最适生长条件及对DBP的降解能力进行了分析,结果显示,4株菌的最适生长条件为pH 7.0~8.5,温度30~35℃.以DBP作为目标测试物,在适宜条件下测试了4株菌的降解能力,显示这4株菌均为高效降解菌,效率最高的JDC-1能在28 h内将500 mg/L的DBP降解完全,最慢的JDC-8经40 h能将500 mg/L的DBP降解完全,本研究对于DBP降解机制的研究及微生物资源的开发都具有重要意义.     

工艺安全管理系统的适用范围——危险化学品目录及临界量的确定

从工艺安全管理（PSM）的角度,对美国、欧盟等的工艺安全管理系统适用范围的定义进行分析,结合目前国内《重大危险源辨识》中给出的部分危险化学品的临界量,以此为基础制定适合我国国情的危险化学品目录并确定各物质的临界量,提出在我国推行工艺安全管理系统的建议。     

炼油厂环境风险分析及防范措施

对炼油厂可能存在的环境风险进行了识别,分析了其可能造成的环境影响,得出炼油厂油品火灾和气体泄漏的环境风险最大,并从技术设备、职工教育、企业管理和应急预案4个方面提出了降低环境风险的措施。     

工业水处理作业中的隐患识别与排除

剖析了中国石化金陵分公司公用工程部供水二工区工业水处理水场设备运行、检修中存在的问题,提出了解决办法。     

小波熵去噪在微差爆破延时精确识别中的应用

在小波熵去噪理论的基础上,对实际隧道爆破工程采集到的爆破振动信号进行了小波熵方法去噪。利用db8小波对去噪后的信号在尺度a=16进行了连续小波变换得到其模极大值,准确识别了隧道多段别微差爆破实际延期时间间隔,并验证了小波熵方法去噪的可靠性。结果表明,小波熵去噪方法能够有效滤除和抑制爆破振动非线性信号所夹杂的高频噪声分量,并且很好地保留了爆破振动信号的突变细节。对滤波后的信号进行模极大值变换,信号局部奇异点的辨识更准确,可以精确识别隧道微差爆破延时间隔。     

Social identity and applicant attraction: Exploring the role of multiple levels of self

Applicant attraction is a critical objective of recruitment. Common predictor variables of applicant attraction are limited in that they do not provide a comprehensive understanding of the process that shapes the perceptions and beliefs of job applicants about the firms for which they aspire to work for. Because individuals have the inherent desire to expand and enhance their social identities (e.g., personal, relational, and collective identities), they are likely to be attracted to organizations that allow them to do so. Building on recent work on levels of self, our paper suggests that social identities mediate the relation between currently established predictor variables of applicant attraction (e.g., compensation, type of work, and organizational image) and important applicant attraction outcomes. Common predictor variables of applicant attraction can lead to the activation, evaluation, and identification processes described by social identity theory. A theoretical framework is presented that illustrates the mediating influence of social identity on the relations between common predictor variables and applicant attraction outcomes. This framework may lead to more effective recruitment strategies. Copyright © 2015 John Wiley & Sons, Ltd.     

聚类分析和标识指数法在苏州城区河道的应用

选取2013—2014年苏州市古城区河道8个监测断面的水质监测数据,应用层次聚类分析法和改进的综合水质标识指数法对苏州市古城区河道水质进行综合评价,并对各监测断面综合水质达标率进行计算。结果表明:苏州市古城区主河道水质在2013年5月份后明显好转,但小河道水质改善较小;在空间上呈现出城北河道水质较城南好,纵向河道水质比横向好的特点。根据评价结果与实际工程情况对比发现,层次聚类分析和水质标识指数法可以有效、准确地对城区河道水质进行总体评价。     

Quantifying the characteristics of particulate matters captured by urban plants using an automatic approach

It is widely accepted that urban plant leaves can capture airborne particles. Previous studies on the particle capture capacity of plant leaves have mostly focused on particle mass and/or size distribution. Fewer studies, however, have examined the particle density, and the size and shape characteristics of particles, which may have important implications for evaluating the particle capture efficiency of plants, and identifying the particle sources. In addition, the role of different vegetation types is as yet unclear. Here, we chose three species of different vegetation types, and firstly applied an object-based classification approach to automatically identify the particles from scanning electron microscope(SEM)micrographs. We then quantified the particle capture efficiency, and the major sources of particles were identified. We found(1) Rosa xanthina Lindl(shrub species) had greater retention efficiency than Broussonetia papyrifera(broadleaf species) and Pinus bungeana Zucc.(coniferous species), in terms of particle number and particle area cover.(2) 97.9% of the identified particles had diameter ≤10 μm, and 67.1% of them had diameter ≤2.5 μm. 89.8% of the particles had smooth boundaries, with 23.4% of them being nearly spherical.(3) 32.4%–74.1% of the particles were generated from bare soil and construction activities, and 15.5%–23.0% were mainly from vehicle exhaust and cooking fumes.     

常州市环境空气质量功能区划调整研究

以尊重自然、顺应自然为原则,立足常州大气环境质量分布特征及污染源排放规律,以自然保护区、风景名胜区和其他需要特殊保护的区域为基线,综合气象环境均一性分析、大气环境敏感区域识别的结果进行优化,再与城市总规"四区划定"进行协调性分析后最终确定环境空气质量功能区划调整方案。