国内外空气质量监测网络设计方法研究进展

如何设计效率高、代表性好、目的性强的空气质量监测网络,是长期以来空气质量监测工作的难点与关键。随着环境管理水平的提高,环境空气质量监测网络的设计成为当前研究的热点之一,国内外很多学者对其进行了广泛的研究。文章对美国、欧盟和我国关于空气质量监测网络设计的规范进行了简要评述和比较分析,并参考国内外一些关于空气质量监测网络设计的研究和应用实例,对当前主要的设计方法及应用进展进行了综述。     

The role of symbolic capital in stakeholder disputes: decision-making concerning intractable wastes

This paper examines almost 30 years of disputation concerning the disposal of the world's largest stockpile of the toxic organochlorine, hexachlorbenzene. It describes the study of a chemicals company in its attempt to manage the disposal of the toxic waste in a collaborative fashion with government, environmentalists and the local community. The study describes the new processes and structures specifically designed to address the decision-making and the issues of stakeholder perception and identity construction which have influenced the outcomes. Decision-making in such disputes is often theorized from the perspective of the emergence of highly individualized and reflexive risk communities and changing modes and expectations of corporate responsibility as a result of detraditionalization. We argue that the stakeholder interaction in this study reflects competing discourses in which corporate actors prioritize the building and maintaining of identity and symbolic capital rather than an active collaboration to solve the ongoing issue of the waste. As well, issues of access to expert knowledge highlight the relationship between conditions of uncertainty, technoscientific expertise and identity. The events of the study highlight the challenges faced by contemporary technoscientific corporations such as chemicals companies as they must deliver on requirements of transparency and openness, while maintaining technoscientific capacity and strong internal identity. We conclude that the study demonstrates the co-existence of social processes of individualization and detraditionalization with quasi-traditions which maintain authority, thus challenging the radical distinctions made in the literature between modernity and late or reflexive modernity.     

电改电袋复合除尘器在220MW机组上的应用

分析了某电厂220MW机组燃煤锅炉电改电袋复合除尘器的设计优化、运行调试和关键参数,重点对比了改造后电袋复合除尘器和常规袋式除尘器的清灰周期、运行阻力等参数变化,为燃煤锅炉电改电袋复合除尘器设计和运行维护的提供参考。     

How green is your thumb? Environmental gardening identity and ecological gardening practices

For gardeners, the garden is a significant aspect of identity. The number of people who garden and consider themselves environmentally friendly is growing. This exploratory study investigated whether “environmental gardening identity” is a measurable construct that motivates environmentally-friendly home gardening cultivation practices above that predicted by the previously validated environmental identity scale (EID, Clayton, 2003). A mail questionnaire was sent to a random sample of 800 urban-suburban self-identified gardeners (61% return rate.) The survey contained four sections: (1) the environmental identity scale (EID); (2) a new scale instrument designed to measure environmental gardening identity (EGID), (3) multiple choice questions addressing specific gardening practices, and (4) demographic questions. Results show that environmental identity, as measured by the EID, significantly predicts ecological gardening behavior. Additionally, it was found that the environmental gardening identity scale (EGID) comprises five subscales, all of which are highly correlated with the environmental identity scale (EID), and three of which explain the variability in gardening practices above that explained by the EID. However, it does not appear that these three subscales of the EGID specifically measure identity. Additional analyses show that respondents' reasons to have a garden are linked to the strength of both EID and EGID, especially for those respondents who garden as a way to connect with nature.     

市政污水处理场的景观设计

论述景观设计在市政污水处理场建设中的重要性。从景观设计分类的角度，对市政污水处理场建筑造型设计、造景组合进行分析和探讨，并结合具体设计方案讨论这一课题。     

Conflict and Coalitions: An Examination of Outdoor Recreation Magazines

We examined whether value differences between various recreation interest/activity groups are created and sustained by the textual information presented to their readers in magazines. Using a two-stage qualitative approach, our research sought to explore the exact nature of the dialogue in the magazines. We sought detailed, intimate information on a selected number of magazines to assess how the popular press socially constructs knowledge about recreation groups, and we sought to better understand how various recreation group members assign meaning to their activities and interpret the interests of other groups. Findings revealed limited negativity of activity users towards one another; most of the conflict found in the text of the articles in recreational magazines was characterized as macrodispositional. Accordingly, in the articles most of the antipathy was directed towards government because of stricter regulation of activity or towards commercial consumers whose exploitation of resources is perceived to threaten groups' activities. Moreover, such conflict crosscuts various groups whose issues and concerns are often similar. Since environmental battles are no longer any one group's issue, many have coalesced and engaged in conflict with lawmakers and commercial consumers. It is clear that the recreational magazines do play a role in shaping readers' attitudes.     

武夷山风景名胜区景观要素斑块特征分析

针对近年来开展生态旅游等人类活动的强烈干扰给风景区带来巨大生态影响的问题，在武夷山风景名胜区景观类型划分的基础上，从景观要素斑块特征的角度对武夷山风景名胜区的景观格局及破碎化进行初步的研究，以期为今后武夷山风景名胜区的景观生态保护提供科学的依据．研究结果表明，在武夷山风景名胜区中，马尾松林、茶园与农田是风景区中3个主要景观类型，三者面积与周长之和分别占全区的84．581％和81．669％；景观要素的面积、周长、斑块数的分布极不平衡，尤其在3类主要景观类型中，在斑块面积、周长方面差异显著；各景观要素面积与周长的分布极为相似，而斑块数的分布却没有明显的规律性；景观要素面积、周长、斑块数等斑块特征分析表明，茶园、居住地、经济林等人工或半人工经营景观的破碎化程度高，而马尾松各天然林景观的破碎化程度低，从而证明了人类经营活动的干扰是导致自然风景区景观破碎的主要因素之一．表3参18     

观光农业生态园的规划设计

发展观光农业是“绿色经济”大背景下的一种自然选择。许多观光农业生态园因为缺乏科学的规划设计和经营管理，造成旅游形象定位模糊，观光性、生态示范作用以及科普教育和农业科技示范性不强。文章提出观光农业生态园规划时应遵循因地制宜、培植精品、效益兼顾的原则，结合实例探讨了具体规划方案，将生态园建成一个“生态农业示范园”、“观光农业旅游园”、“绿色食品生产园”及“科普教育和农业科技示范园”，最终实现生态园生态、经济和社会效益的统一和可持续发展。     

CB125T手把管的弯管机弯曲模具设计

介绍了CB125T摩托车手把管的弯管机弯曲工艺及模具,并以该件为例介绍了CNC弯管机弯模设计中的几何尺寸计算方法。     

空气幕技术在阻断矿井漏风中的应用

在通风系统改造过程中,应用“有效压力理论”充分利用闲置设备,自行设计制造了节能空气幕,既节省了空气幕的成品购置费用,又解决了系统的漏风问题。