The importance of market interdependencies in modeling energy systems - The case of the European electricity generation market

The analysis of complex electricity generation systems such as the European one require large scale models based on extensive databases of the relevant infrastructures. Such models are increasingly used to assist policymaking by developing scenarios to investigate the impact of certain policies on generation capacities, investments and prices. The continuing liberalization and interconnection of energy markets thereby requires the considerations of multiple interdependencies with other markets. Most models, however, do not take this into account. This paper develops and applies a large scale electricity investments and dispatch and natural gas market dispatch model to highlight the importance of recognizing interdependencies between power generation and the gas market. In an exemplary analysis, it is demonstrated that seasonal gas price patterns resulting from temperature-dependent household gas demand have a significant impact on the competitiveness of gas-fired power stations in competition with other technologies. Spatially, we show that competitive cost-based gas prices would lead to a relocation of such plants closer to the sources of natural gas.     

微棱镜反光阵列超声振动刨削试验研究

通过超声振动刨削加工微棱镜阵列的正交试验,分析了刀具材料、刀具工作前角、切削速度、第三次切削深度对微棱镜阵列表面质量和刀具寿命的影响。结果表明：刀具材料是试验指标粗糙度Ra、V形槽夹角β、加工后刀尖圆弧半径R的第一影响因素;第三次切削深度ap是磨损量NB的第一影响因素;切削速度v是四个试验指标的第二影响因素;当刀具材料选用PCD,刀具前角为-3.8°,切削速度为900mm/min,第三次切深为2μm时,微棱镜阵列表面加工质量好,刀具寿命高。     

高负荷GSM网络的优化技术

文章给出了现有GSM网络高负荷区域的定义,结合高负荷区域的特点和面临的问题,从网络结构调整、频率规划与载频配置、业务均衡分担、网络参数调整4个方面讨论了相应的优化技术,以期解决网络建设运营中的一些实际问题.     

基于可持续发展的节约型城市规划设计

对于我国资源紧缺的现象,建设节约型城市是我国当前的必然趋势,是贯彻落实可持续发展目标的重要途径。本文从可持续发展的角度出发,探讨了规划设计节约型城市的思路和策略。     

浅谈龙门刨床的电气技术改造

简要叙述了龙门刨床的电气技术改造方案。即主传动系统由SCR－D取代原K－F－D系统，电控部分用可编程序控制器PLC取代原继电器－接触器控制方式。改造后效果良好。     

A low-carbon future: Spatial planning's role in enhancing technological innovation in the built environment

The scope of spatial planning activity includes issues of governance, corporate organisation, policy integration, statutory and regulatory frameworks, and technical analysis and design. The nature of its potential contribution to achieving low-carbon built environments will vary according to the resolution of tensions between pressures for leadership, consistent decision making and speed of change and the value placed on diversity, flexibility and innovation.     

冷再生铣刨回收沥青混合料微表处技术研究

研究了铣刨回收沥青混合料在微表处中的应用，通过实例介绍了铣刨回收沥青混合料的检验与评价、冷再生稀浆混合料材料选择技术要点及配合比设计流程和方法。研究了冷再生稀浆混合料的施工性能和路用性能，并做对比试验路段对研究成果进行了验证。     

核电工程经济数据库

核电工程经济数据库由核电厂经济数据库、核燃料循环经济数据库和核电规划与环境经济数据库三部分组成，用ＯＲＡＣＬＥ Ｖ６．０实现。核电厂经济数据库包括公共经济数据、电厂技术参数、工程投资数据、经济效益数据等内容。核燃料循环经济数据库燃料技术参数和价格数据。核电规划与环境经济数据库由历史经济、预测经济、能源平衡、电力、能源设施等数据组成。     

Feature-based Integrated CAD/CAPP/CAM System For Concurrent Engineering

Ｆｅａｔｕｒｅ＿ｂａｓｅｄＩｎｔｅｇｒａｔｅｄＣＡＤ／ＣＡＰＰ／ＣＡＭＳｙｓｔｅｍＦｏｒＣｏｎｃｕｒｅｎｔＥｎｇｉｎｅｒｉｎｇＷａｎｇＨｕｉｃｈｅｎｇＺｈａｎｇＸｉｎｆａｎｇＺｈｏｕＪｉ（ＣＡＤＣｅｎｔｅｒｏｆＨ．Ｕ．Ｓ．Ｔ）ＡｂｓｔｒａｃｔＴｈｉｓ...     

机场跑道加铺超薄沥青层施工

广州白云国际机场跑道应急整修工程,在不停航条件下,采用单层5cm超薄国产SBS改性沥青混凝土加铺 层的施工技术进行夜间施工取得成功。文章介绍了超薄沥青加铺层的施工要点,特别是超长距离平接缝大面积铣刨、 六机联铺全幅热接缝摊铺和碾压等新工艺和新技术;提出施工的注意事项和预控措施。