地面辐射供暖设计的几点参考意见

本文阐述低温热水地面辐射供暖设计中应注意的几个问题,供设计与应用时参考。     

萘系高效减水剂的合成

萘系高效减水剂是一种用途较广性能优越的高效减水剂。探讨了它的合成方法、反应控制因素、成品对混凝土性能的影响。     

浅谈不同含水量下的地基加固

结合砖混结构地基灰土挤密加固的工程实例，介绍了在不同含水量情况下用灰土挤密法加固地基的施工工艺，并对其施工要点及特殊情况的处理进行了探讨，经实践验证了该地基加固的可行性。     

刍议散热器设计选型

列举了经常使用的各种散热器,分析其材质及使用条件,并从散热器施工安装形式、热媒水质、散热器材质、金属热强度及热价比等方面进行分析并指出了工程设计选用中应注意的事项.     

Haloacetic acids and trihalomethanes in finished drinking waters from heterogeneous sources

Trihalomethanes (THM) and haloacetic acids (HAA) are the most frequent chlorination by-products (CBP) in finished drinking waters. Traditionally, THM have been used as surrogates for CBP although the quantitative association between THM and other CBP is not well established. This problem is addressed in the present study from the analysis of THM and HAA in drinking water samples from four Spanish regions, representing areas with very different CBP composition, e.g. between 86 and 8.0 microg/l of THM and 50-3.0 microg/l of HAA.The resulting dataset exhibit a statistically significant correlation between total THM and HAA (Pearson's correlation coefficient, r(p)=0.815,p<0.0005). Furthermore, specific HAA are highly correlated with specific THM or their combinations. Accordingly, multivariate linear regression analysis of the concentrations observed show that the levels in total and specific HAA can be predicted from the THM content. These results are relevant for epidemiological studies on health effects from CBP exposure since they usually involve comparison of populations consuming waters of very distinct quality.     

水煤气两段炉生产过程报警与联锁

介绍了水煤气两段炉生产过程中参数报警的原因及处理措施，并介绍了安全联锁的设置部位及其作用。     

从工程事故谈地下室抗浮问题

本文针对地下室抗浮问题提出一些看法和应对措施,以防止地下室浮升、结构破坏、底板裂缝、漏水等事故的发生。     

Probabilistic Modelling in the Water Industry

The water authorities in England and Wales, which have now become water companies, recently had to provide anticipated costs for maintaining the water supply and sewerage systems over the next 20 years. Probabilistic models and statistical inference provide an opportunity to quantify the uncertainty in such exercises. Their use in a study undertaken by a water authority in the north-east of England is described and illustrated with interim data which were available at an early stage in the exercise.     

火电厂ZYGL-Ⅲ型专用在线工业离子色谱分析测量装置的研制及应用

针对传统的水质分析仪器在大机组火电厂应用过程中存在阻抗不匹配、测量信号衰减,静电、电磁场干扰,以及传统高效离子色谱分析法代表性不强,测量数据传输不及时,受环境温湿度影响大等问题,研制了电极常数为0.001 cm^-1、测量范围0~0.001的专用在线工业离子色谱分析测量装置,并在内蒙古京隆发电有限责任公司投入使用。实际使用情况表明,该装置可以准确测量出各种离子的质量分数,应用效果良好。     

农村及偏远地区饮用水除氟研究

研究了农村及偏远地区地下饮用水的除氟方法及其工艺流程、发展中的除氟新方法及新材料;分析了现有饮用水除氟设施存在的问题及其原因;提出了适合于农村及偏远郊区的除氟方法及其设施的发展方向.