Greening the state? The framing of sustainability in Dutch infrastructure governance

This paper investigates how the notion of ‘sustainability’ is strategically framed in the context of Dutch infrastructure governance in the Netherlands. By conducting a frame analysis (based on policy documents, websites and semi-structured interviews), the paper discerns six sustainability frames. These frames concern substantive (e.g., more focus on ecology), process (activating new networks) and organizational (e.g., new practices of work) aspects. The paper also illustrates how these sustainability frames relate to the changing institutional context of infrastructure policy and governance more broadly. The paper discusses some of the productive and challenging implications of the dynamics of sustainability in today’s complex and multi-dimensional world of governance.     

State-of-the-art of ecological modelling with emphasis on development of structural dynamic models

The paper deals with two major problems in ecological modelling today, namely how to get reliable parameters? and how to build ecosystem properties into our models? The use of new mathematical tools to answer these questions is mentioned briefly, but the main focus of the paper is on development of structural dynamic models which are models using goal functions to reflect a current change of the properties of the biological components in the models. These changes of the properties are due to the enormous adaptability of the biological components to the prevailing conditions. All species in an ecosystem attempt to obtain most biomass, i.e. to move as far away as possible from thermodynamic equilibrium which can be measured by the thermodynamic concept exergy. Consequently, exergy has been proposed as a goal function in ecological models with dynamic structure, meaning currently changed properties of the biological components and in model language currently changed parameters. An equation to compute an exergy index of a model is presented. The theoretical considerations leading to this equation are not presented here but references to literature where the basis theory can be found are given. Two case studies of structural dynamic modelling are presented: a shallow lake where the structural dynamic changes have been determined before the model was developed, and the application of biomanipulation in lake management, where the structural dynamic changes are generally known. Moreover. it is also discussed how the same idea of using exergy as a goal function in ecological modelling may be applied to facilitate the estimation of parameters.     

浅谈南阳市滨水型新农村生态建设

在滨水型新农村建设现状问题透析和生态农村理论与规划技术策略解读的基础上,对滨水型新农村建设规划的思路进行论述,从技术层面提出高效、和谐的理想农村形态,归纳得出具体的综合指导原则框架。     

文山州环境保护对策研究

针对文山州存在的主要环境问题，结合文山州社会经济发展实际情况及自然环境和污染分布特点，提出相应的环境保护对策。     

从头越,再创环境质量新高

“九五”以来，昆山市在经济结构调整力度加大、经济总量快速增长的同时，环境保护工作同两个重点、打好“三个战役”、加大了三个力度，建成了国家环境保护模范城市。对今后一段时间环境保护工作提出了新的目标和任务，并在工作中要“实现三个转变、落实三项措施”，以推进昆山市经济和环境的协调发展。     

城市近郊农村生态环境问题浅析

近郊农村受城市化发展的影响，经济生产方式和社会结构发生了很大的变化，原有的循环系统被打破，产生了一系列的环境问题。生活废水任意排放、垃圾堆放无序、不合理的使用农药化肥等因素造成的面源污染已经成为我国农村环境污染的主要成因。本文以成都市金牛区为例，分析近郊农村存在的主要环境问题，并提出一些措施建议。     

当前排污费征收中的问题和发展方向

本文针对在2000年“一控双达标”工作后排污费征收中出现的问题，提出了相应的解决办法，同时对排污费今后的发展作了简要阐述。     

生态城市,城市规划与建设的目标—论南宁市的生态环境保护与可持续发展

分析了南宁市城市发展中存在的生态环境问题，探讨了南宁市的生态优势，指出创建生态城市已是南宁市城市规划建设与城市综合整治的当务之急，根据生态学原理，结合南宁市的具体情况提出相应的对策     

对风险投资中若干问题的探析

风险投资或称为风险资本、创业资本,是指以股权、准股权或具有附带条件的债仅形式投资于新颖或未经试用技术项目或未来具有高度不确定性的项目,并愿意为所投资的项目或企业提供管理或经营服务,期望通过项目的高成长率并最终以某种方式出售产权以取得高额中长期收益的一种投资方式.风险投资经过了将近20 a发展,从发展实践看,还是比较慢的,与国外先进的风险投资业相比,我国的风险投资业还存在着许多方面的问题急需解决.本文针对风险投资中现存的问题,对风险投资中的组织形式的选择、政府的定位、融资的解决、人才的管理及资本退出机制的确定等问题进行了探讨,并提出了相应的解决方法.     

Daphne: a new multimetric benthic index for the quality assessment of marine coastal environment in the Northern Adriatic Sea

A new benthic index, named Daphne, is proposed for the Northern Adriatic coastal area, near the Po river delta. It is based on six characteristics of the community that do not require in-depth taxonomic expertise: number of mollusc species, % of bivalves, % of polychaetes, abundance of the opportunistic species Corbula gibba, % of amphipods and number of 'typical mollusc species' that are individuated by multivariate analysis. The application of the index in selected stations along a gradient of decreasing disturbance shows that it is simple to use in regular monitoring campaigns and that the results are consistent with environmental quality data in the special conditions of this area subjected to considerable river runoff. The index can be used in addition and as a complement to more widespread indices (such as M-AMBI); a comparison of the two indices performance is discussed.