5-Br-PADAT和3,5-Br_2-PADAT作为络合滴定指示剂的应用

研究了 5 [(5 溴 2 吡啶 )偶氮 ] 2 ,4 二氨基甲苯和 5 [(3,5 二溴 2 吡啶 )偶氮 ] 2 ,4 二氨基甲苯作为直接滴定铜和以铜为回滴剂的指示剂的应用 ,以及以前者为指示剂滴定铜与锌等离子总量 ,并借助掩蔽剂以提高选择性 ,成功应用于铜合金等样品的分析。     

Direct and mediate assessment of acidity in hydromorphic habitats in West Siberian Plain

The paper aims to show that mediate indication of environmental acidity conditions in hydromorphic habitats in the West Siberian Plain is possible by means of using indicator values for soil moisture and nutrient factors as substitute predictors. These factors are viewed as interrelated for plant communities located in the wetlands in the West Siberian Plain. Regression equations are introduced to assess the pH of soil solution in wetland plant communities.     

科技指标体系研究与系统实现

本文针对上海市科技统计工作的特点与需要,在参考现有的科技统计指标信息系统的基础上,提出了一套适合上海的科技指标体系,在此基础上进行了设计与实现,实际应用表明提升了科技统计信息的利用率,提高了科研人员统计的工作效率。     

Understanding industrial energy use: Physical energy intensity changes in Indian manufacturing sector

This study develops and examines physical energy intensity indicators in five industrial sub-sectors—iron and steel, aluminum, textiles, paper, and cement—and investigates mitigation options for energy related CO₂ emissions (during 1991–2005). Decomposition analysis has been employed to separate the structural effect (share of different products in the sector) from pure intensity effect (efficiency increase through technical improvement) for each industry. The results show that the combined effect (considering both structural and intensity effects together) on both iron and steel and paper and pulp industries is negative while it is positive for aluminum and textiles. The intensity effect for all the industries, barring textiles, is negative showing improvement in energy efficiency; iron and steel in particular, has seen a decrease of 134 PJ in energy consumption owing to improvements in efficiency. However, energy intensity in textiles has risen by 47 PJ due to increased mechanization. Structural effect is positive in aluminum and iron and steel industries indicating a movement towards higher energy-intensive products. In the case of aluminum, positive structural effect dominates over negative intensive effect whereas negative intensive effect dominates iron and steel industry. The paper helps in designing policies for improving productivity and reduce energy consumption in India's manufacturing sector.     

系统化的信息安全评估方法

信息安全评估是保证信息安全保障长效机制的关键。以动态系统控制理论为基础,针对信息系统的信息安全评佑问题进行了研究,设计了系统化信息安全保障框架模型,提出了信息安全系统化的评佑模型,给出了系统化评估的方法和流程,以为信息系统的信息安全评估打下基础。     

高校"两课"实践教学效果的评估指标体系建立探析

探讨了高校“两课”教学过程中实践教学的意义，并对影响高校“两课”实践教学效果的因素进行了分析，这些因素即是完成评估体系时的评估指标。使用由美国首先引入到教育评价领域解决权系数确定问题的层次分析法。     

指针的入门及详解

指针是C语言中一种非常重要的数据类型,是C语言的精华和特色之一,灵活地运用指针可以处理各种复杂的数据结构,它可以使程序简洁、紧凑、高效,学习和使用C语言就要深入学习和掌握指针。     

新型故障指示器检测平台研究与应用

为了提升故障指示器测试的自动化水平,有效解决传统故障指示器测试速度慢、难以模拟各种接地情况下的配网故障波形,研制了电压-电流隔离控制的新型故障指示器测试平台,采用不可控整流与可控整流融合的拓扑结构,采用自适应模糊PI控制算法,准确设置电压、电流幅值、相位、频率等参数,通过上位机控制实现自动循环周期测试,装置目前在江西电力科学研究院故障指示器测试实验室应用,测试证明该装置不仅具备短路、防误动常规性测试功能,同时具备事故波形反演功能。     

碳酸盐中碳酸钙的测定

提出了碳酸盐中利用硫酸铵预先沉淀分离碳酸钡、碳酸锶后,以K-B作指示剂,用EDTA标准溶液滴定碳酸钙的方法.     

容量法测定水质总硬度时对分析结果误差的分析

EDTA络合滴定法测定水质总硬度、常规使用的指示剂——EBT指示剂和K-B指示剂对Ca^2 、Mg^2 两离子的显示灵敏度差异较大，故在分析中会造成系统误差通过我们的多次实验和实践使用Cu-PA指示剂得到的分析结果位于常规指示剂带来的正偏差和负偏差之间，这是因为Cu-PAU指示剂对Ca^2 、Mg^2 两离子的显示灵敏度差异较小的原故。