Design and Application of Large-CapacityKaplan-Type Turbine Governor

随着社会对可持续发展和节能减排的日益重视，水电已成为优先发展的清洁能源，大容量轴流转桨式机组在水电建设中已得到普遍采用，但其调速系统的控制机理复杂，安全性与可靠性要求较高。 本文在可编程计算机控制器（PCC）的基础上对该类机型的调速器进行了研究和设计，并对现场应用及试验情况进行了详细介绍。 针对轴流机组控制复杂的特点及当前调速器测频的精度和可靠性不高的缺点，通过对比分析，采用高可靠性的PCC模块作为机组调速器的硬件，并设计了PCC调速器的电气控制系统结构，阐述了频率测量的原理及实现方法。 本文对调速器采用的PID控制算法进行了研究，分析了对积分环节以及调差的反馈信号所取位置进行改进之后的...With increasing emphasis on sustainable development and energy conservation of society, Hydropower has become a priority to the development of clean energy Large-capacity Kaplan-type turbine in hydropower construction has been universally adopted. The mechanism of control of the Governor system is complex and also it has high safety and reliability requirements. The research and design has been ...学位：工程硕士院系专业：软件学院_工程硕士(软件工程)学号：X201023018

Studies of the Synthesis of FeMo-co Modeling Compounds 1. Spectroscopic Studies of the Strategy in the Design of the Synthetic Method.

[中文文摘]本文讨论了以K_2MoS_4,FeCl_2,KOR(R=-CH_2CH_2OH或-CH_3)为基本原料,合成固氮酶铁钼辅因子(FeMo-co)模型物合成方案的设计依据。系统地考察这种体系的电子吸收光谱和激光拉曼光谱特征及其随时间的变化。实验结果支持了所提出合成方案的设计依据。[英文文摘]The strategy in the design of synthetic method for the synthesis of dicnbane-type modeling compounds of FeMo-co,with K2MoS4,FeCl2,KOR (R=-CH2CH2OH,or-CH3),and NaHS (or KHS) as the principal starting materials,has been discussed.A systematic study of the characteristic electronic absorption spectra and Laser Raman spectra of such systems,as well as the changes in spectral characteristics with time,has been made.The experimental results provide support for the strategy in the design of the synthetic method

甲烷氧化偶联制C_2烃La_2O_3基催化剂的研究

本文的实验结果表明,具有开放型本征构型的La_2O_3对甲烷氧化偶联反应有相当好的活性和选择性,在750℃、原料气空速6.O×10~4ml.g~(-1).h~(-1),CH_4:O_2:N_2=3.7:l.0:9.0(V/V)的反应条件下,氧接近全部转化,甲烷转化率达25.4％,C_2烃选择性为43.6％,添加碱土金属(Ca、Sr、Ba)氧化物或碳酸盐能显著地改善催化剂的性能,在上述反应条件下,60mol％Ba-La_2O_3催化剂的C_2烃选择性达到58％