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对北京地区既有居住建筑热计量改造工程进行了抽样调研,通过对调研统计数据的分析,得出供暖季室内温度分布状况、实测每平米耗热量、室外平均温度下的每平米耗热量、典型楼栋耗热量、低能耗楼栋耗热量及高能耗楼栋耗热量分布状况,并与我国居住建筑节能设计标准进行比较,为今后既有建筑节能改造和热计量政策的实施提供参考。 相似文献
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通过对燃气采暖热水炉测试装置热损失进行理论计算、实验测试与数据分析,发现对于同一测试装置,测试装置单位时间热损失Φ_0和循环水温度与环境温度的温差ΔT之间存在线性关系。可根据循环水温度与环境温度的温差ΔT,按照由实验数据拟合的关系式直接计算测试装置单位时间热损失(拟合值)Φ_0,然后根据供暖热效率的测试时间,计算得到测试装置热损失(拟合值) Q_0,然后计算供暖热效率。用Q_0计算得到的供暖热效率与用测试装置热损失(实测值)得到的供暖热效率的偏差的绝对值小于或等于0. 1%。这样,可以简化测试流程,缩短测试时间,提高工作效率。 相似文献
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以天津地区16个计量供暖小区3个供暖期单位面积供暖耗热量作为研究样本,采用单因素方差分析法评价节能引导措施(向高用热量用户发送用热量信息、入户进行节能措施宣传与指导,旨在调动用户主动节能行为)对供暖耗热量影响的显著性。根据实测数据,评价实施节能引导措施的节能效果。由显著性评价结果可知,节能引导措施对高耗热量小区的供暖耗热量影响显著,对低耗热量小区影响不显著。由实测数据可知,3个供暖期16个小区平均室内外温差修正后的单位面积耗热量分别为0. 375、0. 355、0. 338 GJ/m~2。对于高耗热量小区,与第1个供暖期的单位面积耗热量相比,第2个供暖期下降8. 7%,第3个供暖期下降14. 2%。节能引导措施对降低供暖耗热量有一定效果。 相似文献
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针对乌鲁木齐市实施“煤改气”工程后的供暖系统现状,提出定额供热方案.以某热力公司为例,应用能耗模拟软件DeST-h、DeST-c分别模拟典型居住建筑、公共建筑在不同室外温度下供暖热负荷指标及耗热量,计算出在满足室内设计温度的要求下,定额分配给各热力站的耗气量.与上一供暖期实际消耗燃气量进行对比分析,拟采用的定额供热方案可节约14.7%的燃气量. 相似文献
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结合目前高速公路施工项目招投标活动的实际情况,阐述了最低评标价法的概念,归纳了其优点及存在问题,对完善最低评标价法提出几点策略,以期促进招标投标市场更加规范有序。 相似文献
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This article analyses state-led place-making practices in Melbourne. The two levels of government that influence planning in Melbourne make much of the city as ‘culturally vibrant’ and ‘creative’, and have incorporated creative city-inspired place-making principles into many layers of the planning system. An examination of the development of two mixed-use megaprojects in central Melbourne reveals however that ideals of culturally engaging public places, and indeed of creative landscapes for middle-class consumption, wither in the face of more basic imperatives for economic development. In these case studies the ‘creative city’, no matter how the idea is interpreted, has little traction either as a set of inclusive place-making principles or as a gentrification strategy. The article concludes that the creative city-inspired place-making objectives in the planning system at both state and local levels are ambiguous in their overall intents and completely unsupported by statutory controls. Such place-making objectives as are realised are the compromised results of the interplay of uncoordinated decisions, delivered at the pleasure of the developer. 相似文献
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Vo Thi Yen-Phi Andrea Rechenburg Joachim Clemens 《The Science of the total environment》2010,408(9):2050-2053
Septage is widely acknowledged as a major source of infectious pathogens while disposal of septage, and the operation and maintenance of septic tanks, is not regulated in many developing countries. Twenty untreated septage and septage sludge samples were taken from Can Tho City, Vietnam to examine their pathogen content, and indicator micro-organisms. Escherichia coli and Enterococcus spp. were detected in all samples, regardless of sludge storage time. Phages were detected in 80% of samples. Salmonella spp. were detected in 70% of the untreated septage and 60% of septage sludge samples. Concentrations of phages and bacteria tested in septage sludge after many years of tank storage were much higher than the expected levels. Helminth ova were present in 95% of untreated septage samples with an average of 450 ova l− 1, and were detected in all septage sludge samples with an average of 16,000 ova l− 1. Twelve varieties of helminth ova were identified. More helminth ova varieties in higher concentrations were found in septage than those reported from stool samples. The varieties' frequency ranged from 10% to 50% and Ascaris lumbricoides predominated. Results show that pathogens and indicator micro-organisms, especially helminth ova, accumulate in sludge. Thus helminth ova should be considered when septage sludge is treated and used for agriculture. Proper health protection measures must be applied for people handling septage. 相似文献
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近两年来,工程公司在提高市场竞争意识、推动市场化进程中做了大量工作,其中坚持走出去的方针是我们自我加压、推行加快市场化步伐的一个重要战略步骤。 相似文献
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新时期广东城市化的新特点 总被引:4,自引:0,他引:4
新时期广东城市化出现以下特点:知识源导向、城市由单体向群体化发展、产业集群推动、政府主导自上而下的集约化发展、城镇化向城市化转变、由重“数量”发展向重“质量”发展的转变。 相似文献
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《Planning》2022,(5)
在市场条件下高校基建财务人员在加强日常财务管理的同时,必须树立起高度的工作责任心,抓好事前监督、事中监督、事后监督三个环节,全面理解、贯彻执行《高等学校财务制度》,管好用好各项基本建设资金,提高基建财务管理水平,更好地完成高校各项基建任务,以有限的投资,最快的建设速度,获得最大的投资效益。 相似文献
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北京中原房地产经纪公司市场研究部 《建设科技(建设部)》2005,(4):47-48
趋势一:CBD区域写字楼集中放量从各区域规划方案上看,CBD区域多数项目在03~04年处于项目的报批手续及拆阶段,预计2005年正式推向市场,因此2005年CBD区域将成为北京市场供应集中的域,区域即将供应的项目有北京财富中心(二期)、金地国际花园、万达广场、SOHO尚都、万通中心、世纪财富中心、怡禾国际中心、光华国际等。除去未知项目,2005CBD写字楼办公面积的供应量为60万平方米左右。中关村区域经过一段时间的集中供后开始逐步放缓,2005年供应的体量相对较大的项目有中关村金融中心、新中关。金街区域可能开盘的项目只有2个:英蓝国际中… 相似文献
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浅谈我国工程项目建设成本控制存在的问题 总被引:2,自引:0,他引:2
结合目前我国施工企业工程项目成本管理现状,对工程项目成本管理过程中存在的问题进行了较详细的分析,并提出了一些解决问题的办法,以做好项目成本控制工作,进而增强企业经济实力。 相似文献
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Jesse E. Raine 《The Annals of Regional Science》1972,6(1):135-144
Conclusions It may be reasonably concluded from this study that the range of variation in these ratios of assessed to actual value are of a reasonable size for the great majority of cases. The frequency distribution of these sample ratios was not normal, however, as was assumed a process of this type would produce. On the other hand, the failure of the regression analysis to identify any significant variables which would explain these variations would tend to re-enforce the assumption that the fluctuations were indeed of a random nature.To sum it up in one paragraph, aside from a few extreme cases, the assessing process appears to give estimates which are more consistent than would be expected under the assumption that any errors would be of a random nature, but the regression analysis was unable to isolate any particular socioeconomic characteristics which would explain the variation which was present.Financial support for this research project was furnished by the University of Tulsa. 相似文献