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《中国石油和化工标准与质量》2021,(5)
随着我国现代化大都市进程的不断加快,人们生活工作用电量也在逐步攀升,电力施工规划越来越受到关注和重视。为了能够有效地缓解用电压力,提供高质量用电服务,电力行业一直以来致力于创新发展,优化架空输电线路施工工程,合理对杆塔、路径、防雷等进行规划设计,完善架空输电线路施工措施,为我国电力建设提供重要的支持。 相似文献
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《玻璃钢/复合材料》2016,(11)
正十三五电力发展主基调:重视绿色高效风电将加快增速国家发改委、国家能源局11月7日正式发布了《电力发展"十三五"规划》,这份新出台的规划从供应能力、电源结构、电网发展、电力体制改革、民生用电保障、节能减排、科技装备发展、综合调节能力8个方面绘制了电力发展"十三五"蓝图。规划期为2016年到2020年,涵盖了水电、核电、气电、风电、太阳能发电等各类电源和输配电网。《规划》指出,在供应能力方面,预计2020年全社会用电 相似文献
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针对当前营销算法,设置用电量约束范围较广,导致电力节能业务营销精准度较低的问题,提出差异化密度聚类下的电力节能业务精准营销算法。构建用户用电数据挖掘决策树,深入挖掘用户用电数据,采用差异化密度聚类算法,划分用户电力数据,确定电力节能用户分布。从用户用电效用和供电公司收益两方面,建立营销目标函数,设置用电量约束和最小用电量约束,实现电力节能业务精准营销。实验结果表明:所提算法的用户耗电量、用电总容量和交易电量,与其实际值相差较小,能够有效提高电力节能业务营销精准度,为用户提供精准的电力节能业务。 相似文献
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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。 相似文献
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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. 相似文献
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The proportions of the different lecithin fractions have been determined in HeLa and KB tissue culture cells and Ehrlich Ascites
tumor. 82.8% of the total phosphatidyl choline phosphorus is found in fraction 3 of HeLa cells. The major phosphatidyl cholines
found in KB cells and Ehrlich Ascites tumor are in fractions 3 and 4 and representing 66.6% and 88.7% of the total phosphatidyl
choline P, respectively. The incorporation of 1,2-14C-choline and 1,2-14C-ethanolamine into the various phosphatidyl choline fractions has been assayed to determine their biosynthesis in Ehrlich
Ascites tumor. The incorporation of 1,2-14C-choline into fractions 3 and 4 is 100 times the 1,2-14C-ethanolamine. This evidence indicates that the methylation pathway of phosphatidyl choline synthesis is very low in HeLa,
KB and Ehrlich Ascites cells.
One of 13 papers presented at the symposium “Lipid Metabolism in Cells in Culture,” AOCS Meeting, Houston, May 1971.
Part of a thesis submitted to the Graduate School of the University of North Dakota in partial fulfillment of the Degree of
Master of Science. 相似文献