生活垃圾简易堆放场的稳定化判别及综合整治

在20世纪80年代以前,我国各大、中城市几乎均采用简易填埋方式处理生活垃圾。目前，大多数简易填埋场面临着二次污染控制和封场利用的问题。综合分析了国内外对填埋场稳定化的研究成果，提出了生活垃圾堆放场稳定化状态的简易判别指标,并对国内简易堆放场的污染治理和场地恢复利用提出了相应的技术措施和土地再利用原则。     

城市生活垃圾处理前沿动态

随着经济的发展、城市居民生活水平的提高,城市生活垃圾已经成为当前世界性的严重公害之一.本文综述了国内外城市生活垃圾处理最新前沿动态,介绍了最先进的垃圾管理方法和处理技术.各个地区生活垃圾的特性不同,其生活垃圾的处理方式亦有所差异.但采用分选回收再生材料、焚烧回收能源和卫生填埋于一体的综合处理方法是各国处理生活垃圾的趋势.     

Knowledge, consumption, and endogenous growth

In neoclassical theory, knowledge generates increasing returns – and therefore growth – because it is a public good that can be costlessly reused once created. In fact, however, much knowledge in the economy is actually tacit and not easily transmitted –and thus not an obvious source of increasing returns. Several writers have responded to this alarming circumstances by affirming hopefully that knowledge today is increasingly codified, general, and abstract – and increasingly less tacit. This paper disputes such a trend. But all is not lost: for knowledge does not have to be codified to be reused and therefore to generate economic growth.     

城市垃圾资源化及其对策研究

一面是当代城市疲于应付的巨量垃圾,一面是白白浪费的大量资源。这种尴尬的情景,我们该如何应付?本文从分析各种垃圾处理手段、垃圾的资源性以及垃圾资源化的可行性入手,得出结论:垃圾资源化是解决城市垃圾问题的根本出路。同时我们研究了垃圾资源化的瓶颈——处理技术和回收通道,并提出了突破相关瓶颈的策略建议。     

D2D通信中一种资源分配与功率控制结合的方案

以underlay方式工作的D2D(Device-to-Device)通信通过资源共享复用蜂窝网络中的资源,在提高系统资源利用率的同时,对已有蜂窝链路带来了同频干扰。为了减小因无线资源复用带来的干扰,提出了一种资源分配与功率控制相结合的方法。以最小化系统干扰为目的,通过在D2D链路之间合理地分配资源,保证了蜂窝链路的通信质量;同时动态地调整D2D链路的发射功率,在保证相应蜂窝链路干扰可控的情况下,合理提高了D2D链路的通信质量。仿真结果表明,与现有方案相比,所提出的算法能够有效地提高D2D通信与蜂窝用户共存场景下的系统性能。     

改造性再利用——一种再生产的开发方式

当前许多传统工业因经济结构和产业结构的调整而闲置了大量的旧厂房、仓库和码头等设备 ,同时因城市数量和面积的迅速扩大 ,蚕食了大量用地。为此 ,根据城市和建筑发展的历史 ,作者认为一种再生产的开发模式———改造性再利用应该立即引入 ,并指出它的发展动力和价值在于 :有利于盘活存量 ,优化土地资源配置 ;有利于环境的改善 ;有利于发掘和保护地方文化。     

撂荒农地再利用的生态经济效益及其影响因素——基于粤赣100家农业经营主体的调查

研究目的:通过对粤赣100家农业经营主体调查,研究撂荒农地再利用的生态经济效益及其影响因素,并提出相应的建议。研究方法:首先应用DEA模型中的CCR方法测度了撂荒农地再利用的生态经济效益,并进一步应用半对数回归模型和主成分分析法,实证分析了撂荒农地再利用的生态经济效益的影响因素。研究结果:总体上,撂荒农地再利用的生态经济效益最高的是种植业,最低的是养殖业;发达地区撂荒农地再利用的生态经济效益总体上低于不发达地区;绿色、生态农产品的出售比例,绿色、生态农产品与非绿色、非生态农产品的产值比,政府补贴额度,银行信贷额度,社会服务机构数量,主要农业经营者的文化程度、见识广度等因素对撂荒农地再利用的生态经济效益均产生正向的影响,而年龄则对其产生负向影响。研究结论:政府需要在绿色、生态农产品市场,财政补贴,信用贷款,社会服务机构和吸引优秀农民返乡进行绿色、生态创业上提供政策支持。     

初探国外废旧纺织品回收再利用发展现状

大量的废旧纺织品不仅造成资源的浪费,也带来了一系列环境问题。通过阐述德国、英国、日本、美国等国家的废旧纺织品回收再利用现状和主要的回收再利用方式及数量,还有相应各国的循环经济相关政策,为进一步推动我国废旧纺织品的循环利用提供参考和借鉴。     

Examining Corporate Communications of Environmental Responsibility on Corporate Websites: Main Themes,Linguistic Features,and Text Reuse

Abstract

The present study intends to examine environmental corporate social responsibility (ECSR) disclosure on official corporate websites within and across a collection of companies. Through an automated content analysis, the findings suggest two broad themes underlying corporate disclosure, and significant associations between personal pronoun usage/lexical diversity and corporate CSR performance were found. In addition, text reuse analysis illuminated certain communication patterns across different industries. Overall, the present study implicates not only theoretical research on ECSR disclosure, but also practical ECSR reporting on corporate websites.     

Does food processing mitigate consumers’ concerns about crops grown with recycled water?

This paper presents results from a field experiment designed to evaluate whether food processing alleviates consumers’ concerns about crops grown with recycled water. Recycled water has emerged as a potentially safe and cost-effective way to replace or supplement traditional irrigation water. However, adoption of recycled water by U.S. agricultural producers has been modest, in part, because of concerns that consumers will be reluctant to accept their products. Our results suggest that simple processing of foods such as drying or liquefying can relieve some of consumers’ concerns about use of recycled irrigation water. While consumers of processed foods are indifferent between irrigation with recycled and conventional water, they are less willing to pay for fresh foods irrigated with recycled water relative to conventional water. We also found that consumers would experience a welfare gain from a labeling policy communicating the use of recycled irrigation water on both processed and fresh foods. Our analysis further reveals that informational nudges that provide consumers with messages about benefits, risks, and both the benefits and risks of using recycled water have no statistically significant effect on consumers’ willingness to pay for fresh and processed foods irrigated with recycled water relative to a no-information control group.