Economic development and environmental protection: an ecological economics perspective

This paper argues on both theoretical and empirical grounds that, beyond a certain point, there is an unavoidable conflictbetween economic development (generally taken to mean 'materialeconomic growth') and environmental protection. Think for a moment of natural forests, grasslands, marine estuaries, salt marshes, and coral reefs; and of arable soils, aquifers, mineraldeposits, petroleum, and coal. These are all forms of 'natural capital' that represent highly-ordered self-producing ecosystemsor rich accumulations of energy/matter with high use potential (low entropy). Now contemplate despoiled landscapes, eroding farmlands, depleted fisheries, anthropogenic greenhouse gases,acid rain, poisonous mine tailings and toxic synthetic compounds.These all represent disordered systems or degraded forms of energy and matter with little use potential (high entropy). The main thing connecting these two states is human economic activity. Ecological economics interprets the environment-economyrelationship in terms of the second law of thermodynamics. The second law sees economic activity as a dissipative process. Fromthis perspective, the production of economic goods andservices invariably requires the consumption of available energy and matter. To grow and develop, the economynecessarily 'feeds' on sources of high-quality energy/matter first produced by nature. This tends to disorder and homogenizethe ecosphere, The ascendance of humankind has consistently been accompanied by an accelerating rate of ecological degradation, particularly biodiversity loss, the simplificationof natural systems and pollution. In short, contemporary political rhetoric to the contrary, the prevailing growth-oriented global development paradigm is fundamentally incompatible with long-term ecological and social sustainability. Unsustainability is not a technical nor economic problem as usually conceived, but rather a state of systemic incompatibilitybetween a economy that is a fully-contained, growing, dependent sub-system of a non-growing ecosphere. Potential solutions fly inthe face of contemporary development trends and cultural values.     

金鱼藻对Cu2+的生物吸附特征

研究了沉水植物金鱼藻对Cu2 的吸附动力学及热力学特征.结果表明,金鱼藻对Cu2 的吸附在20min内达到平衡,吸附动力学的实验结果符合伪二级动力学方程,其相关系数达到0.9937,表明该吸附为多种反应同时作用的复杂过程.用Langmuir和Freundlich2种吸附等温式拟合吸附热力学的实验结果表明,以Langmuir模型拟合效果更好,相关系数为0.9977,其最大吸附量为7.79mg/g.在解吸实验中,各浓度组的解吸率均在1%以下,表明金鱼藻对Cu2 的吸持作用较强.     

MFC在UG二次开发CAD系统中的应用

针对UG开发中的困难,目前还没有在UG/OPENAPI中调用MicrosoftFundamentClass(MFC)的方法,着重介绍了如何应用MFC开发UG的方法以及辅助开发模块UG/Open MenuScript的使用。并用一个完整的例子来说明如何利用UG/OPENAPI,MFC,及MenuScript进行联合开发CAD系统。     

处理含锌铅钢铁厂粉尘的Inmetco工艺

Ｉｎｍｅｔｃｏ工艺是处理含锌铅钢铁厂粉尘的重要方法。本文在实验的基础上，对该工艺处理我国含锌铅钢铁厂粉尘的可行性和合理性作了论述。     

Environmental perceptions of second home tourism impacts in Finland

Experiencing nature and enjoying natural amenities have long been identified as key motives for rural second home tourism. However, the more people travel and spend time in the natural environment, the more it is disturbed by their actions and activities. In this paper, we examine how people perceive the environmental impacts of rural second home tourism and how they justify their views. The study focuses on Finland where rural second homes are widespread. Analysis is based on a questionnaire survey conducted among Finns in 2012 (n?=?1189). Responses from different groups of respondents (second home owners, regular users of second homes and non-users) are quantitatively and qualitatively analysed. The results indicate that the Finnish respondents generally think that second home tourism poses some degree of harmful environmental impacts. However, it is the second home owners who are least worried about these environmental impacts. They generally justify their opinions using a “place-related” perspective, that is, by referring to their own experiences and actions at the cottage site. In contrast, the non-users see environmental impacts more often from a broader perspective by referring to the wider environmental interconnections with second home tourism. In our discussion, we introduce the notions of place-based (relative) and phenomenon-based (relational) environmental perceptions as a potential framework for future research on this topic. In mitigating the increasing environmental impacts of second home tourism, understanding the environmental perceptions and awareness of second home owners and users is crucial to be successful in mobilising sustainable options and environmental governance.     

垃圾焚烧中抑制二恶英二次生成的方法探讨

根据生活垃圾焚烧技术中二恶英的生成机理,余热锅炉的烟气在低温区急冷可以避免二恶英在低温区的再次合成,但目前在余热锅炉烟气低温区急冷是不可行的。提出一种从垃圾焚烧系统设计上进行烟气的急冷,从而抑制二恶英低温区二次生成的新方法。     

三相电力有源滤波器（APF）控制策略的研究

介绍了有源电力滤波器控制策略,提出了PWM控制技术在电网电压畸变情况下对电网中滤波电流进行连续动态补偿。建立了PWM控制的逆变系统模型并进行仿真研究,结果验证了该控制策略能有效补偿谐波电流。