1∶2000成图比例尺数字航空摄影测量质量控制与保障

通过《太原市1∶2 000成图比例尺数字航空摄影测量》项目实践,以该项目中1∶2 000数字线划图制作为例,结合数据分层详细介绍了数字摄影测量中的质量控制与保障的措施,以供类似测量工作借鉴。     

矩形暗埋段隧道的估算

以太原市南沙河沿岸中矩形暗埋段隧道为例,结合其场地岩土构成与工程特性,对建筑安装工程费(人工费、材料费、机械费)、工程建设其他费用以及基本预备费进行了估算预测,为项目决策提供了参考依据。     

Lignite mining and electricity generation in Poland: The current state and future prospects

This opinion paper presents the current state and future scenarios of Polish lignite mining. For many years, over 1/3 of domestic electricity, that is about 53–55 TWh, has been generated by lignite-fired power plants. Currently, with 63–66 million tons of extraction, Poland is the fourth lignite producer worldwide and the second in the European Union. There are three possible scenarios for the development of lignite mining in Poland by 2050. Unfortunately, despite the huge lignite resources, amounting to more than 23.5 billion tons, and great potential of the mining industry, the future of Polish lignite mining does not look optimistic from the economic point of view. This is associated with social and environmental problems, including the European Union's climate and energy policy. However, this may change in the event of a global economic crisis and unstable geopolitical conditions. Therefore, a new energy doctrine for Poland at least by 2050 is urgently needed.     

SJ型虹吸式雨量计的日常维护及常见故障排除

文章阐述了SJ型虹吸式雨量计的结构和工作原理;介绍了日常使用中的维护和保养方法;对仪器的常见故障现象进行了详细地分析,并给出了相应的处理方法。     

Timing-based business models for flexibility creation in the electric power sector

Energy policies in many countries push for an increase in the generation of wind and solar power. Along these developments, the balance between supply and demand becomes more challenging as the generation of wind and solar power is volatile, and flexibility of supply and demand becomes valuable. As a consequence, companies in the electric power sector develop new business models that create flexibility through activities of timing supply and demand. Based on an extensive qualitative analysis of interviews and industry research in the energy industry, the paper at hand explores the role of timing-based business models in the power sector and sheds light on the mechanisms of flexibility creation through timing. In particular we distill four ideal-type business models of flexibility creation with timing and reveal how they can be classified along two dimensions, namely costs of multiplicity and intervention costs. We put forward that these business models offer ‘coupled services’, combining resource-centered and service-centered perspectives. This complementary character has important implications for energy policy.     

建筑设计防火规范中的疏散问题辨析

针对设计和审图实践中常见的防火疏散问题,对规范相关条款进行了解读,并且提出了建设性的意见,根据疏散人群的行为特点,并充分发挥消防设施的效能,使安全疏散设计更加合理。     

当前形势下施工企业工程造价控制的对策

围绕建筑业宏观经济形势下施工企业产值利润率低下、建造成本加大的现状,对各种影响因素进行了分析研究,提出了施工全过程应对的思路与对策,以期降低造价成本,为类似施工企业提供帮助与借鉴。     

北京地铁16号线对周边环境影响分析

本文以北京地铁16号线建设为例,初步分析了地铁建设及运营期间对周边环境可能产生的几种影响,如降水引起的地面沉降、地铁施工导致的水质环境恶化、地下水流场和水位变化以及地铁对沿线水源三厂、四厂保护区的影响等方面,并针对每种情况采用定性与定量相结合的手段展开分析,以期合理地评判出地铁建设及运营对周边环境的影响。研究表明:16号线沿线以卵石层为主,基坑降水所导致的地面沉降相对较小;地铁建设过程中必然会对地下水水质产生一定影响,因此必须规范施工,将对地下水水质的影响降低到最小;地铁施工期间,基坑降水影响范围内存在部分开采水源井,考虑到沿线含水层以卵石为主,渗透性好,降水停止后水位恢复较快,因此认为地铁施工会对水源保护区产生暂时性影响;地铁运营后,相当于在原有地下水环境中设置了隔水帷幕,这种对地下水的"拦截"作用必将导致迎水面地下水位抬升和背水面地下水位的下降,但是不论升降,变化幅度都不是很大,且离地铁越远,地下水状态受影响越小。     

谈公路施工测量

分别阐述了公路工程施工测量的重要性及其原理,着重介绍了公路建设过程中施工前准备阶段和施工中的工作内容及应注意事项,对提高施工测量水平,提高工程质量有一定的积极意义。     

晋中市龙湖街立交人非系统的设计

通过对晋中市龙湖街立交人非系统的设计的介绍,指出了设计城市互通立交与公路互通立交的主要区别;明确了人非系统平面依据整个立交形式设计,其竖向设计直接影响到立交整体工程量以及景观效果;人非系统设计注重以人为本的原则,减少行人和非机动车的绕行距离,使行人、非机动车辆在整个立交中通行安全、便捷。