Internal-corrosion inhibitors for pipelines carrying deaerated heating water

The effect of internal-corrosion inhibitors on heating-system pipelines is investigated. Tests were conducted on a testing device for polarization measurements under conditions corresponding to the Rostov Heat-Supply System. The concentration of OEDP-zinc, which provides a high degree of protection from general corrosion, is determined. The reagent has been successfully incorporated into the Rostov No. 2 TPP. __________ Translated from élektricheskie Stantsii, No. 7, July 2007, pp. 37–43.     

Internal-corrosion inhibitors for pipelines in heat-supply systems carrying water with a high oxygen content

The reliability of heat-supply systems is determined primarily by internal corrosion of the pipelines. The concentration of oxygen in the water exerts a major influence on the corrosion. In systems with a standard oxygen content, OéDF-Zn is a highly effective corrosion inhibitor. However, there are systems in which the quality of deaeration of the make-up water of the heat-supply system is low (or deaeration is nonexistent), and the concentration of oxygen is considerably above the standard value. Classed among these systems, for example, are the HWS systems, which are incorporated into closed heat-supply systems. The oxygen concentration in these systems is analyzed to assess the situation. __________ Translated from élektricheskie Stantsii, No. 6, June 2007, pp. 35–39.     

无线通讯在热电厂供热系统中的应用与实现

论述了在热电厂供热系统中采用无线通讯的方法以及实现数据采集和控制的系统组成.简要介绍了数传电台的基本工作原理和数据传输过程.并根据系统数据采集和控制要求,设计了RS485硬件接口电路.详细介绍了在上位机中,采用MCGS组芯软件情况下,为保证上、下位机之间的正常数据通讯,所需要的RS232通讯时的接口软件的编程方法,并给出了一段参考主程序.系统功能完善,结构灵活,可靠性和安全性强,实现了供热自动控制功能.     

Facebook User Research Using a Probability‐Based Sample and Behavioral Data

Research on Facebook users is often based on small convenience samples and on usage data collected through survey self‐reports. The current research contributes to Facebook user research, as it is based on a large, nationally representative, probability‐based, U.S. sample with Internet usage data collected from meters. Results revealed that 50% of sample members are recent Facebook users. However, within this group, there is wide variation in amount of usage between heavy, medium, and light users. Finally, based on a multivariate analysis, Facebook users are significantly more likely to be women, teens, whites, and adults with at least a high school diploma. These demographic patterns apply to heavy, medium, and light Facebook users.     

Current Therapies and Technological Advances in Aqueous Aerosol Drug Delivery

Recent advances in aerosolization technology have led to renewed interest in pulmonary delivery of a variety of drugs. Pressurized metered dose inhalers (pMDIs) and dry powder inhalers (DPIs) have experienced success in recent years; however, many limitations are presented by formulation difficulties, inefficient delivery, and complex device designs. Simplification of the formulation process as well as adaptability of new devices has led many in the pharmaceutical industry to reconsider aerosolization in an aqueous carrier. In the acute care setting, breath-enhanced air-jet nebulizers are controlling and minimizing the amount of wasted medication, while producing a high percentage of respirable droplets. Vibrating mesh nebulizers offer advantages in higher respirable fractions (RFs) and slower velocity aerosols when compared with air-jet nebulizers. Vibrating mesh nebulizers incorporating formulation and patient adaptive components provide improvements to continuous nebulization technology by generating aerosol only when it is most likely to reach the deep lung. Novel innovations in generation of liquid aerosols are now being adapted for propellant-free pulmonary drug delivery to achieve unprecedented control over dose delivered and are leading the way for the adaptation of systemic drugs for delivery via the pulmonary route. Devices designed for the metered dose delivery of insulin, morphine, sildenafil, triptans, and various peptides are all currently under investigation for pulmonary delivery to treat nonrespiratory diseases. Although these devices are currently still in clinical testing (with the exception of the Respimat®), metered dose liquid inhalers (MDLIs) have already shown superior outcomes to current pulmonary and systemic delivery methods.     

集中供热系统水处理设施的维护及新技术

对供热系统水处理设施中水过滤器、钠离子交换器(软化设备)的维护工作要点进行分析,对电磁法软化水技术进行了探讨。     

集中供热系统水处理方法选用

以某供热单位为研究对象,介绍了离子交换法、加药法、电磁法3种水处理方法。对3种水处理方法进行比较,提出其适用场所。采用集中水处理比现有分散式水处理有优势。     

基于GSM热网远程监测主站系统的设计与实现

针对集中供热网络中运行参数的远程监测问题,提出了基于GSM的热网远程监测系统主站系统的总体设计方案,介绍了主站系统硬件和软件设计并设计了具体的以PC机为平台的主站系统.利用GSM短消息方式实现热网系统远程遥测和遥控的数据传递和命令传达,会使整个系统较好地解决了低投入和高效率之间的矛盾.通过热网工程实际应用说明,这种通讯方式不受系统地理条件的限制,在数据传递过程中能够确保传输的快捷性和数据的可靠性.     

对CJJ／T81—98摩擦系数相关条文的修订建议

介绍了EN13941标准对直埋供热管道管线区摩擦层周围回填材料的技术要求及对应的摩擦系数，有别于我国现行标准CJJ／T81-98《城镇直埋供热管道工程技术规程》的相关规定。我国近年来进行的相关试验结果也证明了EN13941标准的正确性，建议对CJJ／T81-98的相关条文进行修订。     

CAPL均热室供热制度对炉温及带钢热瓢曲的影响

通过模拟实验研究和现场实际测试，找出了ＣＡＰＬ均热室在不同供热制度下，炉温和带温的分布规律，分析了它们对带钢产生热瓢曲的影响，提出了改进的措施。