城市大气环境质量的协同评价

根据系统科学思想,在城市大气环境质量（ＡＡＱ）评价中,对＂本质＂与＂异质＂ＡＡＱ等量齐观,并强调污染物的低浓度长时间效应．本文探讨了两者的协同评价方法,利用常规监测资料对５个城市作了实例分析．研究结果与实际情况有较好的一致性．     

Risk Assessment of Riparian Plant Invasions into Protected Areas

Abstract:  Protected areas are becoming increasingly isolated. River corridors represent crucial links to the surrounding landscape but are also major conduits for invasion of alien species. We developed a framework to assess the risk that alien plants in watersheds adjacent to a protected area will invade the protected area along rivers. The framework combines species- and landscape-level approaches and has five key components: (1) definition of the geographical area of interest, (2) delineation of the domain into ecologically meaningful zones, (3) identification of the appropriate landscape units, (4) categorization of alien species and mapping of their distribution and abundance, and (5) definition of management options. The framework guides the determination of species distribution and abundance through successive, easily followed steps, providing the means for the assessment of areas of concern. We applied the framework to Kruger National Park (KNP) in South Africa. We recorded 231 invasive alien plant species (of which 79 were major invaders) in the domain. The KNP is facing increasing pressure from alien species in the upper regions of the drainage areas of neighboring watersheds. On the basis of the climatic modeling, we showed that most major riparian invaders have the ability to spread across the KNP should they be transported down the rivers. With this information, KNP managers can identify areas for proactive intervention, monitoring, and resource allocation. Even for a very large protected area such as the KNP, sustainable management of biodiversity will depend heavily on the response of land managers upstream managing alien plants. We suggest that this framework is applicable to plants and other passively dispersed species that invade protected areas situated at the end of a drainage basin.     

CO2加氢低压合成甲醇CuO—ZnO催化剂性能的研究

本文详细论述了CuO-ZnO的特性与沉淀过程中pH值变化、沉淀剂种类、沉淀剂的加料方式和催化剂的热处理条件,以及活化气氛等因素之间的相互关系,实验中运用了XRD,BET,XPS等测试手段,对催化剂的结构及其表面性质进行了深入探讨,得到了催化剂的最佳含量组成和催化剂活性组份可能的存在状态。     

Spatial and Temporal Features of Ambient Air-Quality over Taiwan

This study analyzed a time series data of daily subPSI values to determine the temporal and spatial characteristics of ambient air-quality in Taiwan by employing the Varimax rotational method. The first and second rotational principal components nearly accounted for 54 and 19% for the variation of subPSI values over Taiwan. The factor loadings between rotational principal components and subPSI values of air pollutants identified the first and second components as combustion and photochemical sources, respectively. Time series analysis of rotational component scores associated with regions showed the relationships between rotational components and subPSI values and also revealed the optimum simulation period for combustion and photochemical sources.     

密相流态化气力输送技术的工业试验研究

对燃煤电厂密相流态化气力输送系统的不同工况进行1：1工业试验研究。在不影响粉煤灰正常输送的前提下，采集系统核心部件仓泵的压力曲线及数据，对其进行分析。研究认为，仓泵的设计压力至少可以降低为0.8MPa，并对管路系统提出改进方案，为密相流态化气力输送的设计和运行提供参考依据。     

Environmental Impact of Undular Tidal Bores in Tropical Rivers

A tidal bore impacts significantly on the estuarine ecosystem, although little is known on the flow field, mixing and sediment motion beneath tidal bores. In the absence of detailed systematic field measurements, a quasi-steady flow analogy was applied to investigate undular tidal bores with inflow Froude numbers between 1.25 and 1.6. Experimental results indicated that rapid flow redistributions occur beneath the free-surface undulations, with significant variations in bed shear stress between wave crests and troughs. Dynamic similarity was used to predict detailed flow characteristics of undular tidal bores. The effects of periodic loading on river sediments, scour of river bed and flow mixing behind the bore are discussed. A better understanding of these processes will contribute to better management practices in tidal bore affected rivers, including the Styx and Daly rivers in tropical Australia.     

介绍一种新编制的环境试验用相对湿度查算表

介绍了一种新的环境试验用相对湿度查算表及其编制目的、编制方法,该查算表用较小的篇幅实现更宽的温度和相对湿度的查算范围(与GB6999鄄86《环境试验用相对湿度查算表》比较)。该查算表中对风速与大气压的修正方法有与其他查算表不同的特点,它对提高相对湿度测量(查算)精度有一定的作用。     

脉冲电晕等离子体活化纯CO2的反应

研究了在常温常压下，脉冲电晕等离子体对温室气体CO2的活化与转化分别考察了反应气体流速、脉冲电压峰值、放电频率对纯CO2转化的影响．结果表明，CO2主要分解为CO和O2，另有少量积碳和臭氧产生；随着反应气体流速的增加，CO2转化率、CO产率和选择性降低；随着脉冲电压峰值和放电频率的升高，CO2转化率、CO产率增大，CO选择性降低．     

高能等离子体分解CO_2气体研究

为治理温室气体ＣＯ_２，本工作在低温常压条件下，利用超高压脉冲电晕放电产生的高能量（２０～５０ｅＶ）非平衡等离子体作用于ＣＯ_２气体分子，使ＣＯ_２分子化学结合键断裂，在定向化学反应作用下，将ＣＯ_２气体分解成单原子气体分子Ｏ_２和单质固体微粒Ｃ。ＣＯ_２分解率在９０％以上。     

Thriving on challenge stressors? Exploring time pressure and learning demands as antecedents of thriving at work

In the conceptualization of thriving at work, it is emphasized that employees' learning and vitality are two equally important components of thriving and that thriving is facilitated by contextual features and available resources. In this study, we examined the effects of two challenge stressors (time pressure and learning demands) on thriving at work. Based on the literature on challenge and hindrance stressors, we proposed that challenge stressors positively affect learning and negatively affect vitality. To uncover underlying mechanisms, we measured challenge appraisal and hindrance appraisal of work situations in a diary study. A sample of 124 knowledge workers responded to three daily surveys (before the lunch break, during the afternoon, and at the end of the workday) for a period of five workdays. Results indicate that the indirect effects of learning demands and time pressure on learning are mediated by challenge appraisal, whereas indirect effects of learning demands on vitality are mediated by hindrance appraisal. Overall, our study shows that challenge stressors have a positive total effect on learning but no total effect on vitality. These differential relationships call for a finer distinction between the two components of thriving at work in future research. Copyright © 2016 The Authors Journal of Organizational Behavior Published by John Wiley & Sons Ltd.