无线通信中的定位技术及其业务

无线定位已应用于导航、交通、工程与抢险等许多领域。目前，通过无线通信系统进行定位正以其廉价和灵活的特点受到各方面的关注。基于此项技术的产品与业务已经推出并得到了广泛的应用。随着无线通信技术的发展，数据速率和处理能力的不断提高，它必将有一个美好的前景。文章首先引入了无线通信中的定位技术，介绍了基于此项技术的定位业务，在国内外的应用情况，最后指出了无线定位业务发展需注意的问题。     

松山引水工程输水隧洞开挖施工

：针对松江河梯级电站松山引水洞围岩地质条件复杂、地下水分布和活动情况对输水隧洞开挖施工影响较大的特点，为了预防发生塌方、涌水等重大施工事故，在围岩破碎洞段和不良地质段采用一次光面爆破成型、锚喷支护、变形监测的方法进行施工，保证了工程质量，取得较好的施工效果。     

极对壳绝缘局部放电试验对电容器绝缘老化的评定作用

电容器是一种全密封设备，其绝缘老化状况的判定十分困难。本文试图根据电容器极对壳绝缘的局部放电试验结果，对其绝缘老化进行判断。所得出的结果，对电容器运行有一定的参考价值。     

Using hybrid modeling for life cycle assessment of motor bike and electric bike

Life-cycle assessment (LCA) is environmental evaluation of products, materials, and processes over their life cycle. Truncation uncertainty and corresponding uncertainty are main problems occurred in process life cycle assessment (PLCA) modeling and economic input-output life cycle assessment (EIOLCA) modeling. Through combination of these two modelings in different life cycle stage and use of an uncertainty reduction strategy, a hybrid life cycle assessment modeling method was proposed in this study. Case studies were presented on gasoline-powered motorbikes (M-bike) and electricity-powered electric bike (E-bike). Web-based software was developed to analyze process environmental impacts. Results show that the largest part of life cycle energy (LCE) is consumed at use stage. Less energy is consumed in life cycle of E-bike than that of M-bike. GWP (Global Warming Potential), CO (Carbon Monoxide), PM10 (particulate matter) emission of M-bike are higher than that of E-bike, especially at use stage, AP (acidification Potential) emission of E-bike is higher than that of M-bike. Comprehensively, E-bike is energy efficient and less emitting, and better choice for urban private transportation.     

KDON-170/350型全低压流程空分设备的操作

简述了KDON 170 /35 0型全低压流程空分设备的操作原理、操作方法和操作依据 ,并探讨了实行间断制氧的可行性     

6500m~3/h空分设备分子筛纯化器电加热器改造

介绍了6 5 0 0m3 /h空分设备分子筛纯化器新配电加热器电加热管烧断的故障现象,分析了故障原因,后通过增加气体挡板解决了问题;并通过改造,既达到了分子筛纯化再生的技术要求,又实现了电加热器的一用一备     

空分设备项目投资经济性分析

以一具体项目为例描述了如何用净现值法和内含报酬率法来进行空分设备项目投资的经济性分析及进口(合资)和国产空分设备方案的选择。     

Surface oxidation behavior of Mg-Y-Ce alloys at high temperature

After the Mg-Y-Ce magnesium alloy was exposed to air at a temperature up to 1173 K for 0.5 hours, the dense and compact oxide film formed on the surface. Accordingly, oxidation and ignition of magnesium alloys at elevated temperature was successfully retarded by the Y and Ce additions. Thermogravimetric measurements in air revealed that the oxidation dynamics curves measured at 673 and 773 K followed the parabolic-line law and the curve investigated at 873 K followed the complicate quartic law. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis indicated that the oxide film on the surface of Mg-Y-Ce alloys exhibited a duplex structure, which agreed with the results of thermodynamic analysis. The oxidation film included two layers: the outer layer was a multiple structure of Ce_0.202Y_0.798O_1.601 and Y₂O₃, and the inner layer mainly consisted of metal Mg and MgO.     

以客户为中心，建立紧密客户关系

从武汉钢铁股份有限公司对客户认识上的三次飞跃入手，从公司赢得客户的具体做法、与客户接触、处理客户的投诉、改进与客户的关系等四个方面论述了武汉钢铁股份有限公司以客户为中心，不断更新认识观念、改进服务技术、提高服务能力，从而赢得客户，与客户建立紧密的相互关系。     

探索城市改造中的建筑设计策略--深圳市盐田区深盐路建筑改造设计

以现代城市设计理论为指导,阐述深盐路建筑改造设计的原则,方案构思及项目实施成果。