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分析了城市建筑与城市环境的关系,阐述了城市建筑对城市环境的不利影响,提出了减少城市建筑对环境污染的措施,以实现城市的可持续发展。 相似文献
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介绍了城市地下空间开发利用的重要性,就城市防灾及目前城市地下空间开发利用存在的问题进行了分析,提出了相应对策,以有效提高城市容量,改善城市环境,提升城市生活品质。 相似文献
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在城市建设过程中,各地根据当前城市建设任务重,建设资金缺乏的情况,对城市基础设施建设、经营、管理等方面进行了改革,缓解了城市基础设施建设的资金压力,对改善城市基础设施状况,增强城市功能起到了重要作用。由此,无论在观念上,还是在实践上,经营城市在全国颇为流行,一些省(市)还推行了经营城市的试点工作。 相似文献
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近十年来,是建国以来我国城市建设的高峰期,城市亮化得到了前所未有的重视,由以往满足道路等公共设施、场所的功能性照明发展到城市景观照明。应该说,有品质的城市亮化是一种高效的广告形式,它可以从总体上展现都市或城镇的特点,以培养地方荣誉感,同时城市亮化也是24小时经济的主要成分。通过近年来城市亮化工作的实施,许多城市的白天延长了,夜晚更美丽了,城市品位提升了,经济旅游发展了,城市亮化为城市的发展起到了一定的促进作用。 相似文献
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城市照明总体规划与详细规划研究 总被引:1,自引:0,他引:1
近年来,随着社会经济的发展,人民生活水平的提高,人们的夜间活动需求越来越强烈;顺应时代的发展,各地城市广泛开展城市照明建设,给夜间城市带来极大繁荣,也大大的改善了城市夜间形象,并延长了广大市民的夜间活动范围,刺激了消费,促进了城市经济发展,可以说城市照明建设已深入人心。但是由于受到城市照明建设的投入机制、管理手段等诸多因素的影响,城市缺乏统一规划和设计;从而造成城市照明重点不突出,特色不明显,城市总体亮度分布不合理,并带来了严重的光污染与能源浪费。 相似文献
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介绍了城市设计的过程,对几种城市设计的途径做了简单的比较,并着重分析与引伸城市意象途径,预示了城市意象应用的前景。用城市意象的理论分析了意大利圣马可广场和中国成都中山广场的城市意象,将两者进行对比,以理解城市意象途径在现今城市设计中起到的举足轻重的作用,从而提出城市设计者应注意的问题。 相似文献
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《Stahlbau》2012,81(12):915-915
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The study of the ozonization of phenol, substituted phenols and some phenoxyacetic acids (2-4-D and MCPA) was carried out taking into consideration on the one hand the rate and the mechanism of the reaction leading to the opening of the aromatic cycle and on the other the consumption of ozone in relation to the degree of degradation.We were able to show that in a diluted solution the opening of the aromatic cycle could be obtained with a ratio O3/ΦOH roughly equal to 5 and that the reaction rate depended on the amount of ozone produced.The existence of reactional intermediates and the development of a u.v. spectrum of the substances during the ozonization allowed us to show that the reaction could evolve with the formation of o and p benzoquinone and that the nature and position of the substituent along the aromatic cycle seemed to be a determinant factor in the orientation of the reaction.The degradation of the substances is influenced by the pH, both as far as the rate and the reactional mechanism are concerned.The decrease in the rate of consumption of ozone resulting from the opening of the aromatic cycle leads us to define an optimum production of ozone, which depends on the concentration in aromatics to be degraded and susceptible of leading to the formation of substances which will be more easily biodegradable. 相似文献
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The polysaccharide fraction has been isolated on activated sludges treating domestic sewage and industrial wastewater. It appears that the carbohydrates and related compounds (galacturonic acid and rhamnose) present are partly incorporated into activated sludge mucilage. In the contact-stabilization process, exopolysaccharides synthetized during the contact period are assimilated during the sludge stabilization. Activated sludge exopolysaccharides are believed to be related with some morphological features of the floc particles, i.e. in the case of filamentous bulking. 相似文献
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Bien qu'elles se rapportent principalement aux exigences optimales pour les portes et les fenêtres que doivent utiliser des personnes handicapées, des études effectuées à l'Institut royal de technologie de Stockholm ont montré que certains genres de joints de calfeutrement peuvent assurer une bonne étanchéité à l'air sans obliger à de gros efforts de fermeture. Toutefois, par extension, des joints de caifeutrement plus sophistiqués peuvent améliorer considérablement l'étanchéité à l'air et permettre des économies d'énergie pour un coût relativement faible. 相似文献
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Application of the safety concept of the civil engineering to decisions on investment. In the field of civil engineering in case of scattered sizes on the actions side and resistance side, a safety concept is applied in order to restrict the probability of failure to determined values. In the sector of investment in real estate such a method is not yet common practice. This has in a multitude of cases led to the fact that investment in construction sites failed on the one hand due to the exceed of construction costs or on the other hand, due to exorbitant rents which are not likely to be achieved on the market. In this paper the safety concept of civil engineering is applied to decisions on investment. This is done by equating the construction costs to actions on structures and the value of the real estate to the resistance. The need for further research is stated. 相似文献