新建住宅小区噪声验收监测方法初探

住宅小区噪声监测是近年来房地产验收过程中的重要环节,围绕新建住宅小区噪声验收监测方法、评价标准、布点原则等方面进行初步探讨,并根据某住宅小区噪声验收监测实例,提出了相应的建议。     

电镀企业竣工环保验收监测及后续监管中存在问题探讨

结合电镀企业竣工环保验收监测工作实践,对单位产品基准排水量和排气量的计算和评价,电镀标准中对污染物处理设施排气量的规定,第一类污染物在不同采样点评价标准的选择,重金属排放总量计算以及后续电镀企业废水、废气、污泥监管中存在的问题进行了探讨,并提出了相应的建议。     

公众灾害风险可接受性与避灾意愿的初探——以川渝地区旱灾风险为例

在综述前人研究的基础上,以川渝地区旱灾为例,通过实地调查与访谈,从公众可接受的旱灾损失与频率、假定旱灾风险情景下的避险意愿等角度,对公众旱灾风险可接受性进行了初步探讨。结果表明,公众合理可接受的旱灾损失与频率分别在26.5%~52.8%与32.0%~64.3%区间范围内;并以一般旱灾、严重旱灾风险情景为限制线,确定了公众合理可接受风险区域;随着灾害损失风险增加,公众规避风险投资意愿呈现出中间高两头低的趋势,当灾害损失达到约50%~70%时,公众避险投资意愿达到最高,意愿避险投资占可能损失的比重约为62%。鉴于川渝地区的旱灾形势,今后旱灾风险管理的关键,一是加强对旱灾的监测与预警预报;二是完善旱灾风险的常规化管理,发展高效灌溉农业,充分利用客水资源,完善提高现有农田水网建设;三是积极探索公众-企业-政府多方共同参与的高效风险管理模式。     

Effective EU and Member State policies for stimulating CCS

Although CO₂ capture and storage (CCS) is widely recognised as an option to mitigate climate change, consistent and effective EU policies to advance CCS are still absent. This paper discusses policy instruments for advancing large-scale deployment of CCS in the European Union, and evaluates them in a multi-criteria analysis. The EU Emissions Trading Scheme (EU-ETS) is a cost-effective instrument for limiting greenhouse gas emissions, but it is questionable whether its currently limited time horizon and short-trading periods will lead to substantial CCS diffusion. Complementary policies at the EU and the Member State level may repair this and provide sufficient incentives for CCS. Potential policies include financial instruments such as investment subsidies, a feed-in scheme, or a CO₂ price guarantee, as well as a CCS mandate or a low-carbon portfolio. These policy options differ with respect to their environmental effectiveness, possible interaction with the EU-ETS, costs and financial risk involved, and their competition with other mitigation options. Interactions between Member State policies and the EU-ETS are smaller in scope than those of EU-wide policies, but they are more likely to lead to displacement of financial resources from other low-carbon technologies. In addition, national policies may pose a significant part of the financial risk of CCS operations with Member States, reducing the operator's incentive to innovate. Overall, structural policies at the EU level, such as a mandate or a low-carbon portfolio standard would be more conducive for realising large-scale deployment of CCS across the EU as well as more acceptable to environmental organisations.     

Oviposition of carrot fly (Psila rosae) in response to foliage and leaf surface extracts of host plants

Summary. Foliage of twelve host and two non-host species and surrogate leaves treated with the respective leaf extracts were presented to laboratory populations of the carrot fly (Psila rosae) in oviposition choice assays. The stimulatory activity of dichloromethane surface extracts and the diethyl ether fraction of hot water extracts did not reflect accurately the differences in acceptability observed among intact leaves. A better correlation was found using hexane extracts prepared in a microwave oven. Two out of five fractions of this crude hexane extract obtained by silica gel column chromatography stimulated oviposition. The diethyl ether fraction, which contained the previously identified oviposition stimulants (propenylbenzenes, furanocoumarins, polyacetylenes), could account for only a minor part of the variation in the acceptability of host leaves. The preference hierarchy for intact leaves corresponded better to the ranking of species according to activity of the methanolic fraction, which apparently contains unknown stimulatory compounds.? The water fractions of the hot water extracts were shown to reduce egg-laying underneath surrogate leaves treated with a stimulatory extract. This oviposition-deterring effect was particularly strong with the non-preferred species Pimpinella major, which is also highly resistant in the field. Hence, unidentified inhibitory compounds may also contribute to differential accept ability of host plants. It is concluded that antixenotic (non-preference) resistance of host plants to carrot fly attack depends on complex mixtures of semiochemicals. Received 11 June 1997; accepted 26 November 1997.     

高校毕业生结构性失衡问题探讨

高校毕业生结构性失衡是指随着我国经济结构的变化,毕业生的供给结构与需求结构不协调。通过高校毕业生结构性失衡的实证分析,本文觉得其症结主要是高等教育层次结构和科类结构的失衡。这在很大程度上决定毕业生资源的供给结构,因此,高等教育结构的调整是解决高校毕业生结构性失衡关键。     

建设项目竣工环境保护验收监测的若干思考

分析了竣工验收监测工作中存在的问题,提出了对策建议.     

关于完善建设项目环保设施竣工验收监测报告的几点思考

结合工作实践，归纳了目前建设项目环保设施竣工验收监测报告中存在的几个突出问题，提出了完善竣工验收监测报告的几点建议。     

试论现代广告文案的写作问题

广告文案是广告创作的主体，在文案创作中，应做到主题明确、内容真实、结构简明，另外，还要注意语言科学，要求用词简明扼要、生动新颖，具有适应性和心理鼓动性。     

CFB发电机组环保设施竣工验收废气污染物监测浅议

通过循环流化床（CFB）废气污染源验收监测，CFB锅炉的总脱硫效率可达93．46～96．74％，总除尘率99．66％左右。并结合其他大型煤粉锅炉的验收监测经验，提出了在CFB废气污染源验收监测过程中应注意的问题及对策。