共查询到20条相似文献,搜索用时 46 毫秒
1.
用电路分析法对直流闪光回路进行分析,查找故障,找到了故障原因,并据此进行改进,保证了闪光回路正常工作,为变电所安全运行打下基础。 相似文献
2.
3.
变电所二次回路中保护回路的设计王德山(齐齐哈尔化工总厂生产技术处161033)前言二次回路设计是变电所设计中的一个重要内容。它包括交、直流操作电源的选择,测量回路的设计、控制、信号回路以及保护回路的设计。保护回路的设计是其中最为重要而又复杂的环节。保... 相似文献
4.
在笔者多年对低压电气设备的设计和现场调试中,发现几个比较重要而又容易被大家忽略的问题。下面通过几个事例来进行说明,谨供同行参考交流,并提醒用户在使用中注意或加以改进。 相似文献
5.
针对国产化型胶生产线主电机因过热而烧毁的问题,就主机控制回路和保护回路进行了分析。并提出了改进与完善的措施,收到较好的效果。 相似文献
6.
7.
针对使用离心泵时产生的问题,基于离心泵自身的使用特点,结合使用环境,对其控制回路进行了改进,实现了离心泵的保护,延长了检修周期。 相似文献
8.
针对国产化型胶生产线主电机因过热而烧毁的问题,就主机控制回路和保护回路进行了分析,并提出了改进与完善的措施,收到较好的效果。 相似文献
9.
本文就学习者在《普通物理学》(电磁学部分 )或《电磁学》学习阶段 ,运用基尔霍夫第二定律列回路方程问题 ,从以往有关教材及参考书的通常提法出发 ,针对运用中常存在的问题 ,结合实例 ,提出了列基尔霍夫第二方程组应遵循的原则及简捷方法 相似文献
10.
动态层次分析法在客户关系管理系统中的应用 总被引:1,自引:0,他引:1
提出了一种基于动态的层次分析方法(AnalyticHierarchyProcess)的最优客户选择算法。根据AHP方法确定权重矢量和评价矩阵,再通过运算求出决策矢量,最终实现对候选客户的排序和选择,以帮助解决客户关系管理系统中的最优客户选择问题。 相似文献
11.
通过对二乙酰单肟法测定微量尿素方法存在的问题进行分析试验,改进试剂配制的配比用量,消除空白带色对试验结果的影响,总结试验实施效果与经验. 相似文献
13.
14.
V. YU. ARISTOVICH YU. V. ARISTOVICH A. YU. SOKOLOV J. W. FULMER CHANDRASEKHAR KRISHNAN M. V. RAMANI 《Chemical Engineering Communications》2013,200(6):844-859
The conventional rectification method to separate and purify chemical mixtures has the disadvantage of being an energy-intensive unit operation. The innovative method proposed in this article employs vapor and liquid recycles to the trays that in turn reduce the reflux rate and vapor boil-up rate, resulting in energy reduction without compromising the separations. These findings were supported with examples of ethanol-water and butane- pentane system separations. With ethanol-water system, the experiments were conducted without overhead liquid recycle and using 16 and 5 vapor recycles. The energy saved was found to be 25–35% for 16 recycles and 20–30% for 5 recycles. Butane-pentane system was chosen as an example of industrial use of the proposed method. A liquid overhead reflux ratio of 0.5 (L/D) was used with vapor recycles, compared to a reflux ratio of 1.25 for the conventional separation without vapor recycles. This resulted in 30–35% saving in energy while giving the same productivity of the column. Butane-pentane separation was also simulated using a commercial process simulator (ASPEN©PLUS). 相似文献
15.
16.
17.
18.
V. Yu. Aristovich Yu. V. Aristovich A. Yu. Sokolov J. W. Fulmer Chandrasekhar Krishnan M. V. Ramani Prashant Tatake 《Chemical Engineering Communications》2004,191(6):844-859
The conventional rectification method to separate and purify chemical mixtures has the disadvantage of being an energy-intensive unit operation. The innovative method proposed in this article employs vapor and liquid recycles to the trays that in turn reduce the reflux rate and vapor boil-up rate, resulting in energy reduction without compromising the separations.
These findings were supported with examples of ethanol-water and butane- pentane system separations. With ethanol-water system, the experiments were conducted without overhead liquid recycle and using 16 and 5 vapor recycles. The energy saved was found to be 25-35% for 16 recycles and 20-30% for 5 recycles. Butane-pentane system was chosen as an example of industrial use of the proposed method. A liquid overhead reflux ratio of 0.5 (L/D) was used with vapor recycles, compared to a reflux ratio of 1.25 for the conventional separation without vapor recycles. This resulted in 30-35% saving in energy while giving the same productivity of the column. Butane-pentane separation was also simulated using a commercial process simulator (ASPEN©PLUS). 相似文献
These findings were supported with examples of ethanol-water and butane- pentane system separations. With ethanol-water system, the experiments were conducted without overhead liquid recycle and using 16 and 5 vapor recycles. The energy saved was found to be 25-35% for 16 recycles and 20-30% for 5 recycles. Butane-pentane system was chosen as an example of industrial use of the proposed method. A liquid overhead reflux ratio of 0.5 (L/D) was used with vapor recycles, compared to a reflux ratio of 1.25 for the conventional separation without vapor recycles. This resulted in 30-35% saving in energy while giving the same productivity of the column. Butane-pentane separation was also simulated using a commercial process simulator (ASPEN©PLUS). 相似文献
19.
简要介绍了利用永磁体吊挂工件的方法,较好地解决了小型无孔工件的静电喷塑问题,并对在使用该方法时应注意的若干问题进行了阐述。 相似文献
20.
A. E. O. MUNSELL 《Journal of the American Ceramic Society》1923,6(7):777-782
Clear thinking on color is important. The Munsell System clarifies; shows color in three dimensions: hue, value, chroma. The method of measuring color on solid, sphere, irregular solid, vertical and horizontal slices through the solid. Method of notation. Summary. 相似文献