CBZ-5000变电站自动化系统在我公司总变电所改造中的应用

介绍了许继日立公司CBZ-5000变电站自动化系统的结构、功能及软硬件配置，对总变电所改造后的综合效益进行了评价，认为该变电站自动化系统是工厂变电站改造比较理想的方式，也指出了该系统存在的一些问题。     

CBZ-5000自动化系统在川化总变电所改造中的应用

介绍了许继日立公司CBZ-5000变电站自动化系统的结构、功能及软、硬件配置,对总变电所改造后的效益进行了评价。认为该变电站自动化系统是工厂变电站改造比较理想的方式,也指出了该系统存在的一些问题。     

变电站自动化系统技术升级及应用

根据旧系统的一些特点和局限性,结合以太网技术在变电站自动化系统中的应用,提出了早期变电站自动化系统如何升级改造的思路和方案。并以实际的升级改造工程为例,介绍了老综自系统采用Atop公司SE5116型串口通信服务器的实施情况。     

变电站微机综合自动化系统的应用

介绍HSPASAⅡ型变电站综合自动化系统在工厂中的应用，该系统实现了变电站的微机继电保护和实时集中监控以及用电的自动化管理。     

工厂110 kV变电站综合自动化改造分析与设计

广西鱼峰集团有限公司已运行有20多年的110kV变电站存在有老化、损坏及由此引起的误动作等众多问题。为彻底解决这些问题,鱼峰公司于2011年7月对该变电站实施了综合自动化系统改造,并于2011年8月改造完成并投入运行,取得了比较理想的运行效果。     

变电所自动化系统中安全自动装置关键技术的深析

本文着重探讨变电站自动化系统中安全自动装置的几个方面的问题，列举了本人在参加变电所自动化改造中的一些研究心得和思考，以供大家参考。     

2×2000t/d生产线高压综保装置的改造

我公司一分公司有2条2　000t/d熟料生产线，1999年投运的高压综保（装置）是DVP-600S变电站综合自动化系统，当时较为先进的产品技术已经不能适应现在的生产状况，为此公司决定改造高压综保系统。经调查市场，对比同类产品，最终采用了集保护、监控于一体的DMP-300变电站综合自动化系统。     

变电站实现综合自动化的优越性

变电站综合自动化系统取代传统的变电站二次系统，已成为电力系统的发展趋势。叙述了变电站综合自动化系统的特点以及自动化监控系统的构成、内容及特点。以此体现变电站实现综合自动化的优越性。     

浅谈自动化系统在变电站中的发展前景

随着科学技术的发展,自动化在航天航空、化工、电力系统中的广泛应用。变电站自动化技术经过十多年的发展已经达到一定的水平,在我国城乡电网改造与建设中不仅中低压变电站采用了自动化技术实现无人值班,而且在220kV及以上的超高压变电站建设中也大量采用自动化新技术。随着智能化开关、光电式互感器等机电一体化设备的出现,变电站自动化技术即将进入数字化自动化系统新阶段。     

苏独仑110kV变电站综合自动化改造工程

本文介绍了内蒙古巴彦淖尔市苏独仑110kV变电站综合自动化系统改造情况。     

Metabolism of trideuterated iso-lignoceric acid in rats in Vivo and in human fibroblasts in culture

Saturated very long chain fatty acids (fatty acids with greater than 22 carbon atoms; VLCFA) accumulate in peroxisomal disorders, but there is little information on their turnover in patients. To determine the suitability of using stable isotope-labeled VLCFA in patients with these disorders, the metabolism of 22-methyl[23,23,23-²H₃]tricosanoic (iso-lignoceric) acid was studied in rats in vivo and in human skin fibroblasts in culture. The deuterated iso-VLCFA was degraded to the corresponding 16- and 18-carbon iso-fatty acids by rats in vivo and by normal human skin fibroblasts in culture, but there was little or no degradation in peroxisome-deficient (Zellweger’s syndrome) fibroblasts, indicating that its oxidation was peroxisomal. Neither the 14-, 20-, and 22-carbon iso-fatty acids nor the corresponding odd-chain metabolites could be detected. In the rat, the organ containing most of the iso-lignoceric acid, and its breakdown products, was the liver, whereas negligible amounts were detected in the brain, suggesting that little of the fatty acid crossed the blood-brain barrier. Our data indicate that VLCFA labeled with deuterium at the ω-position of the carbon chain are suitable derivatives for the in vivo investigation of patients with defects in peroxisomal β-oxidation because they are metabolized by the same pathways as the corresponding n-VLCFA. Moreover, as iso-VLCFA and their β-oxidation products are readily separated from the corresponding n-fatty acids by normal chromatographic procedures, the turnover of VLCFA can be more precisely measured. A preliminary report of part of this work (Reference 18) was presented at the 5th International Symposium on the Synthesis and Applications of Isotopes and Isotopically Labelled Compounds, Strasbourg, France, June 20–24, 1994.     

佛山市顺德新城区降水中污染物的监测和分析

为掌握佛山市顺德新城区降水中污染物的情况,2015年7月至8月,文章作者分别在雨天进行了降水取样,对降水中的pH、电导率、常见阴离子(F-、Cl~-、NO_3~(2-)、SO_4~(2-))及部分重金属(铅和镉)进行监测分析。选择有相关数据的珠江三角洲和石家庄、厦门等地的降水中污染物的情况进行对比。结果表明,顺德新城区降水中的p H和部分阴离子浓度优于珠江三角洲平均值,酸雨类型属于硫酸和硝酸混合型;其水体洁净程度略差于石家庄;铅和镉的浓度也高于厦门,甚至部分超出了人体能直接接触的安全范围。     

Denitrification in shallow groundwater in a coastal agricultural area in Japan

In a coastal agricultural area in the central part of Japan (Shizuoka), we found decreasing nitrate concentration with depth in a shallow groundwater, where the depth to water table varied between 0.6 and 1.2 m below ground surface. High nitrate concentrations (5–29 mg N L^–1) were often observed in the upper layer (0–2 m) of the groundwater, but the concentration decreased to less than 1 mg N L^–1 in the deeper layer. Ammonium was scarcely detected, and the concentration of dissolved oxygen was usually low (< 1 mgO₂ L^–1) in the groundwater. Nitrate in the groundwater often had very heavy nitrogen stable isotope ratios (>20{}). There was a negative relationship between nitrogen stable isotope ratio of nitrate and its concentration. When nitrate was injected into the groundwater with acetylene and bromide (a conservative tracer), nitrate concentration decreased to 20% of the initial level within 5 days, accompanied by the increase in nitrite and nitrous oxide concentration and a little change in bromide concentration. These results indicate that microbial denitrification plays a potential role in the decrease of nitrate in shallow groundwater at the study site.     

我国硝酸工业生产技术新进展

系统叙述了我国硝酸工业2000-2007年生产现状及主要技术成果,尤其指出了国产"四合一"机组的成功投运,使我国硝酸国产化装置取得较大的进步,表现在吨酸的铂耗、氨耗和能耗等方面接近国外引进装置水平,同时介绍了国外双加压法硝酸生产技术的进展.我国已成为硝酸生产大国,仍需以先进的技术改造和发展我国硝酸工业,确保我国硝酸工业健康有序地发展,加快从硝酸生产大国向强国迈进的步伐.     

高效液相色谱法分析化妆品中微量成分的研究进展

综述了高效液相色谱法在化妆品中防腐剂、防晒剂中紫外线吸收剂以及性激素的检测等几个方面的应用;同时,介绍了分析所用的色谱柱、流动相、使用的检测手段以及样品的提取方法;最后针对目前存在的问题,提出了高效液相色谱用于化妆品中微量成分分析的研究方向和发展前景。