钢铁冶金工程的演化过程与规律

Ferrous metals have been the basic material used by human beings. In 600 BC, China started to enjoy the Iron Age, so in the long-term practice, iron-smelting had come to be a skillful technique. Accompanied with the economic development of human society, iron-smelting had been transformed into handicraft iron making workshops in addition to farming and stock-raising. The Industrial Revolution boosted the increasing demand for iron and steel products in society and the technological innovation had brought the birth of steel industry and had formed the ferrous metallurgical engineering. In the course of rapid growth of economy in the 20th century, driven by technological innovations, steel industry has made tremendous development. In the 21st century, iron and steel will still be the important materials for human society, and the development of steel industry will be continuing. The history of human society, as a whole, has been an everlasting course of evolution for the survival of human being and the needs for the development of human society. Human race has endeavored to improve economic growth. The evolution of ferrous metallurgical engineering has been just one constituent in the evolution course of utilization, application and fabrication of tools for human society.     

变频器在大型电厂直接空冷系统中的应用

文章介绍了电厂空冷系统的定义，电厂采用空冷系统的优点，空冷风机的变频控制组成，变频柜的构成及其变频器参数、选型要求，空冷风机群的控捌逻辑及转速级配置表。     

Design to Self-Assembly

The increasing power of design software, the widespread availability of digital fabrication and growing complexity of our built environment are in stark contrast to the inefficient techniques that currently plague the construction industry. Today's processes of assembly can be fundamentally re-imagined by looking at biological systems that are building structures with far more complexity, information capacity and assembly instructions than even the most advanced structures possible with current technologies. Skylar Tibbits explains that the key ingredient embedded within these natural systems is self-assembly. He outlines four principles for designing systems that build themselves, and shows a number of projects that demonstrate first steps towards this new mode of architectural production. Copyright © 2012 John Wiley & Sons, Ltd.     

振动磨机介质运动状态及入料粒度分析

分析了振动磨机的介质运动状态，提出工作过程中介质群可以刚化为一个刚体的概念，给出了介质群自转角速度。公转角速度的计算方法：依据介质运动状态分析，导出振动磨机的最大入料粒度，啮角2a的计算公式。     

特殊时代的特殊建造——江西省吉安市井冈山大桥桥头堡的设计与施工

该文基于实际调查采访,叙述和阐释了江西省吉安市井冈山大桥桥头堡的建造历史,并由此透视一个特殊年代的特殊的建造方式。     

“十三五”时期北京市能源消费总量及结构变化趋势预测

"十三五"时期是北京全面建设国际一流和谐宜居之都,加快构建清洁高效安全可持续现代能源体系的重要时期,对北京市能源消费总量控制和结构优化提出了新要求。本文在测算北京市潜在经济增长率的基础上,运用自上而下的方法对"十三五"时期北京市能源消费总量及结构进行了预测。结果显示,到2020年,全市能源消费总量将达到8600万tce,煤炭比重下降到7.4%,天然气比重超过30%,新能源和可再生能源比重提升至8.1%,超前完成《北京市进一步促进能源清洁高效安全发展的实施意见》中提出的总量和结构目标,节能减排工作继续走在全国前列。     

The Builder's Name: SHoP and the Ethics of Knowledge Transfer

Since its inception in 1996 in New York City, SHoP Architects has fixed its sights on reshaping the relationship between design and construction; not only by pioneering the use of new building and modelling technologies, but by assuming a new level of responsibility for the management and assembly of components. Philip Nobel , architectural author and Editorial Director at SHoP, describes how the practice's longstanding engagement with construction has led to an awareness of the importance of the empowerment of builders, leading to responsiveness to local conditions and a proper connection between designers and those who deliver their designs.     

Conviction Into Tectonics: The Work of Rintala Eggertsson

Guest-Editor Christian Hermansen Cordua describes how the work of Norwegian practice Rintala Eggertsson Architects is informed by the principals' strong socio-cultural convictions. They believe that raw capitalism alone cannot create a positive environment; as it renders the landscape no more than a site of mechanised production in which as little as possible is invested with a view to gaining as much as possible in the shortest time possible.     

信息时代的新地理模式

文章试图从结构体系与节点操作两个层次的角度来剖析当下新城市空间背后的地理学体系,并由此引发对建筑师与规划师的社会角色任务的思考。