干支线混合区域的协调控制方案

为解决传统区域协调控制方案因算法复杂、输入量多、非实时性导致协调效果不佳的问题,提出一套以干线为主的区域协调控制方案.首先将区域预设为若干个子区并基于周期原则动态地对子区进行合并与拆分,然后在子区内部对干线采用绿波协调控制算法,获得子区最佳周期和各交叉口最佳相位差,最后对所有交叉口采用基于饱和度估计的单点绿信比优化算法,选择出下一周期最佳绿信比方案.与传统区域协调控制方案相比,该方案计算的复杂度降低、需要的输入量变少、能实时动态地对区域进行协调控制、协调效果更好.通过算例分析和系统仿真,使用该方案后,子区内部能获得大于30％的绿波带宽度,单个交叉口的平均停车次数比传统方案减少65％.     

天线引导数据对伺服跟踪的影响分析

针对目前在天线跟踪系统中普遍采用的数字引导工作方式,结合设计实例详细分析了数字引导方法在引导数据传输率等方面对系统跟踪精度造成的影响.最后结合工程实践,给出了几种减小或消除此类影响的方法,对提高伺服系统的跟踪精度有较大作用.     

Polyethylene glycol as an efficient and reusable solvent medium for the synthesis of thiohydantoins using K2CO3 as catalyst

Polyethylene glycol was found to be an inexpensive, non-toxic, recyclable and an effective medium for the synthesis of thiohydantoin derivatives in the presence of K₂CO₃ as the catalyst. The procedure is operationally simple and environmentally benign.     

装饰表层低压一体注射绿色模具研究与应用

介绍了装饰表层低压一体注射绿色模具的优势和技术原理,从热流道系统、模架、面料挂针机构、面料压块机构、电控柜顺序控制系统、冷却系统等几个方面阐述了该类模具的关键技术和解决方案,将其应用到中低端汽车内饰件的生产制造,可更好地解决新车的环保问题,消除车内残存的有害物质,具有广阔的市场前景。     

Translating Singapore architects' environmental awareness into decision making

Construction activity is known to have a major impact on the environment. Construction is a major consumer of a wide range of naturally occurring and synthesized resources. The extraction, processing and utilization of these resources can have various negative impacts on the environment. With increased awareness and knowledge of these impacts, efforts are being made to avoid these adverse effects. Among these is the selection and specification of appropriate materials. This paper studies the level of environmental awareness and knowledge of architects in Singapore when selecting and specifying materials during the design stage. Responses to a questionnaire indicate that the architects are aware of the environmental impacts of building materials, and knowledgeable about possible measures which could help avoid the problems. However, they are not adopting green design approaches. Key policy directions for government, professional bodies, educators and clients are made to enable Singapore architects to apply their knowledge of environmental issues in their design decisions.     

星级旅游酒店建筑设计之探讨

以大理苍洱国际观光酒店设计为例,通过对我国星级旅游酒店的动态趋势分析,从地域与企业文化、人性化、生态观、与时共进等几方面提出当代星级旅游酒店的动态设计趋向,阐述设计师对当代星级旅游酒店设计手法的运用。     

应用生物酸化技术开发高档啤酒的研究

利用短乳杆菌培养液作为糖化下料水和麦汁煮沸前的ｐＨ值调节剂来生产啤酒，经实验室和生产实践证明是完全可行的。其生产的啤酒达到了ＧＢ４９２７—９１优质酒的标准。     

Energy management in metro-transit systems: An innovative proposal toward an integrated and sustainable urban mobility system including plug-in electric vehicles

The energy consumptions growth, the upward interest for environmental sustainability and the technological evolution carry to the necessity to review the planning criteria of urban mobility systems in large cities and metropolitan areas. With this aim, new studies and projects are in progress, especially dealing with the power systems for metro-transit lines and surface electric vehicles. In this framework, the authors perform a study that, from an overview about the main energy management issues connected to the city transport, provides an innovative proposal for the design of sustainable urban mobility system: the integration of the metro-lines with surface plug-in electric vehicles. The present paper includes the energy analysis results, obtained by an application on a real case study of an home-made simulation software, describes the proposal in terms of power systems architecture and business models, pointing out the potential advantages that its implementation could give in terms of energy saving, environmental sustainability and reduced economic impact, as a result of the maximum exploitation of existing electric power plant.     

变电站绿色工业建筑设计

从优化总平面布置设计、建筑节能与环保设计、太阳资源的利用以及环境友好等几个方面介绍了郑州姚砦110 kV变电站和京汉微波站迁址工程设计中,贯彻"可持续发展"设计理念所采取的具体做法,为绿色工业建筑评价的研究及其标准的形成提供基础性资料。     

Dicistronic regulation of fluorescent proteins in the budding yeast Saccharomyces cerevisiae

Fluorescent proteins are convenient tools for measuring protein expression levels in the budding yeast Saccharomyces cerevisiae. Co‐expression of proteins from distinct vectors has been seen by fluorescence microscopy; however, the expression of two fluorescent proteins on the same vector would allow for monitoring of linked events. We engineered constructs to allow dicistronic expression of red and green fluorescent proteins and found that expression levels of the proteins correlated with their order in the DNA sequence, with the protein encoded by the 5′‐gene more highly expressed. To increase expression levels of the second gene, we tested four regulatory elements inserted between the two genes: the IRES sequences for the YAP1 and p150 genes, and the promoters for the TEF1 gene from both S. cerevisiae and Ashbya gossypii. We generated constructs encoding the truncated ADH1 promoter driving expression of the red protein, yeast‐enhanced Cherry, followed by a regulatory element driving expression of the green protein, yeast‐enhanced GFP. Three of the four regulatory elements successfully enhanced expression of the second gene in our dicistronic construct. We have developed a method to express two genes simultaneously from one vector. Both genes are codon‐optimized to produce high protein levels in yeast, and the protein products can be visualized by microscopy or flow cytometry. With this method of regulation, the two genes can be driven in a dicistronic manner, with one protein marking cells harbouring the vector and the other protein free to mark any event of interest. Copyright © 2009 John Wiley & Sons, Ltd.