气田采出水处理系统优化运行效果评价

长北天然气处理厂气田采出水处理系统自投运以来,在生产运行过程中存在采出水悬浮物含量高、油份处理效果差的状况,回注水中含油、悬浮物较高,回注泵故障频发,回注压力高。分析水质变差原因,同时对现有采出水处理系统进行分析,优化缓蚀剂加注方案,制定加药程序,引入新设备、新工艺提升采出水处理效果,使回注水含油量、悬浮物含量达到回注标准。     

基于空间构成效率的历史古城人流空间分布研究 — —以平遥古城主要商业街道为例

本文针对历史古城中因人流分布不 均衡带来的街道空间活力问题,以空间句法 理论与方法为技术手段,选取平遥古城为研 究对象,通过对实测人流与空间句法模型指 标的回归分析得出与实测人流关联度最高的 句法参数,探讨平遥古城街道空间形态和商 业的空间布局对人流空间分布的联动影响机 制。研究表明：平遥古城的大尺度空间构成 效率与人流量强相关,行人出行活动的差异 是低效的街道空间形态和不完善的商业等级 结构所导致的。针对此问题,本文提出了织 补道路网络结构与锚固局部商业核心节点的 提升策略,旨在为历史古城的发展和保护提 供新的研究思路。     

“科技部建筑节能示范楼”屋顶绿化的设计与施工

介绍了一个节能示范楼的屋顶绿化的案例。采用国内外较先进的屋顶绿化技术和材料,充分展示屋顶绿化植物生态环境;后期养护管理利用建筑贮存雨水的回灌技术,初步验证屋顶绿化在建筑节能方面的作用,总结了屋顶绿化工程实施的技术要点,以及适合北京地区屋顶绿化的建植技术;借此为北京地区屋顶绿化的推广提供技术参考。     

夏热冬冷地区架空平板通风屋顶的节能设计标准研究

依据《夏热冬冷地区居住建筑节能设计标准》的相关规定．对D值达不到要求的架空平板通风屋顶进行隔热验算,得出其节能设计的直观标准,方便广大设计人员在实际工程中采用。     

Energy and exergy analysis of the Greek hotel sector: An application

Energy consumption in buildings vary significantly, depending on factors as the use of the building, the construction type, maintenance, existing heating, cooling and lighting systems and other types of services. Hotel buildings have high energy consumption rate, as a result of their unique operational characteristics. Energy consumption in hotels is among the highest in the non-residential building sector in absolute values. Available specific information on the energy characteristics, thermal performance, energy losses, electric loads, and comfort conditions play significant role for the sustainable development of hotel's systems. These data can also be used to identify whether there is space for improvement in new or existing hotels by comparing them against predicted or actual building energy performance. The aim of the present paper is to analyze the energy and exergy utilization in four hotels in Rethimno, Crete (Southern Greece) and in Kassandra, Halkidiki (Northern Greece).     

真空精炼对铝合金组织和性能的影响

研究了真空精炼的工艺以及对ＺＬ１０１合金组织和性能的影响。试验结果表明：真空精炼有很高的除气效率，针孔度最大可降低４级，它还有提高合金的致密性、力学性能和细化晶粒的作用。     

信息时代医院建筑医疗服务效率探究

本文着重讨论了在信息时代新的医院管理和医院环境设计理念影响下,医院建筑的发展应如何体现医疗服务的效率,并提出核心医院网络的概念及其对中国医院未来发展的指导意义。     

分布筋对ECC压杆性能的影响研究

为了研究分布筋对ECC压杆性能的影响,对5个ECC独立压杆进行了受压试验。研究表明,在ECC压杆中有必要布置钢筋,且仅配竖向分布筋不利于裂缝的控制;双向配置0.001 6的分布筋更有利于充分发挥材料的性能和控制试件使用阶段的裂缝;试验得到的ECC的压杆有效影响系数均大于1.6;减少50%的分布筋用量后ECC压杆仍可获得与混凝土类似的压杆强度。     

Tribological Study of Grease Lubricated Plastic Wormgear for Automotive Applications

Plastic wormgear has many application opportunities in automotive industry because of its low noise and lightweight properties. Three major concerns about plastic wormgear are bending strength, efficiency or friction, and wear. Since standard worm and wormgear designs are developed mainly for metal gears, they are not applicable for the design of plastic wormgear. This paper presented a non-standard design to increase the bending strength of plastic wormgear. By increasing gear contact ratio, the maximum contact stress on the plastic gear tooth was reduced to prevent wear of the plastic wormgear flank. The load, speed, and grease effects on gearbox efficiency and friction coefficient were experimentally studied. While load had a major effect on friction coefficient of grease lubricated plastic wormgear, the speed had much less influence on the friction coefficient of the plastic wormgear. Misalignment of the worm shaft had significant impact on the efficiency of the worm gearbox.     

AC-anodising of aluminium: Contribution to electrical and efficiency study

AC-anodising of AA1050 aluminium alloy in sulphuric and phosphoric acid solutions has been examined, with the contributions of the anodic and cathodic processes evaluated from the electrical signal analysis. The porous anodic film morphology and the potential-time behaviour confirm the similarity with DC-anodising, although lower anodic charge and film formation efficiencies are evident from gravimetric measurements. The anodic charge loss is mainly related to the capacitive current required to re-establish (between successive charge cycles) the electric field strength for ionic migration across the pre-existing and healed barrier layer oxide. Cathodic hydrogen gas evolution is considered to proceed at flaw sites in the barrier layer oxide, leading to high localized current densities that result in high cathodic potentials. Hydrogen gas retention at flaws and pores of the anodic film also contributes to the high cathodic potentials.