运行可靠性在线短期评估方案

运行可靠性短期评估基于能量管理系统/广域测量系统（EMS/WAMS），研究电力系统在实时运行状态下的短期可靠性水平。建立了一套运行可靠性在线短期评估方案，给出了指标体系、评估算法和应用框架。进一步介绍了方案实施中所采用的关键技术:通过建立元件实时模型，评估系统在当前运行状态下的可靠性;基于瞬时状态概率评估系统的短期可靠性;采用快速排序技术进行系统状态选择，协调评估精度和速度的矛盾，实现在线评估;基于系统实时运行工况分析系统状态在预测时刻的后果。通过IEEE-RTS系统验证了整套方案的可行性和有效性。     

信号检测对二分群体决策的模拟

用信号检测系统模拟二分群体决策问题，在４个假设条件下，定义了测试者的检测能力指数，从而计算群体决策绩效。用二元信号检测的最大后验概率最大似然准则作为个体决策者的判决依据。     

晶面标准极射赤面投影图的讨论

以往工作对晶面极射赤面投影原理及投影图阐述甚简[1,2 ] .本文在讨论的基础上 ,运用已知的晶面晶向间夹角[3 ] ,和晶面指数相关规律 ,绘制了立方晶系常用的低指数晶面标准极射赤面投影图     

Determination of oil palm fruit phenolic compounds and their antioxidant activities using spectrophotometric methods

There is scarce information on the phenolics of oil palm fruits (Elaeis guineensis). In this study, phenolics were extracted from oil palm fruits and analysed using spectrophotometry for information on the different types of palm phenolics and their antioxidative activities. Analyses of the total phenolic content (TPC), total flavonoid content (TFC), o‐diphenols index, hydroxycinnamic acid index, flavonols index and phenol index showed ranges between 5.64 and 83.97 g L^?1 gallic acid equivalent (GAE), 0.31–7.53 g L^?1 catechin equivalent, 4.90–93.20 g L^?1 GAE, 23.74–77.46 g L^?1 ferulic acid equivalent, 3.62–95.33 g L^?1 rutin equivalent and 15.90–247.22 g L^?1 GAE, respectively. The antioxidant assay, 2,2‐diphenyl‐2‐picrylhydrazyl radical scavenging assay, showed antioxidative activities in all the extracts with results ranging from 4.41 to 61.98 g L^?1 trolox equivalent. The high antioxidant activities of the oil palm fruit phenolics were also found to increase with increasing TPC and TFC.     

应用RMI指标进行工程岩体分类的方法

RMI岩体分类法成功地吸收了CSIR和NGI分类法的优点，能更好地反映岩块强度和结构面性态对岩体强度的影响，可适用于任何“完整－破碎”岩体的工程分类。本文详细阐述了该方法的基本原理、分类步骤以及参数的确定，并与其它分类法进行了比较。     

基于人工神经网络的矿业城市循环经济综合指标评价

通过参考不同的循环经济评价体系,构建了一套新的矿业城市循环经济评价体系。提出了一种构建指标和它们的权重的实践方法,并且讨论了使用改进BP神经网络方法评价矿业城市循环经济发展的原理。改进的BP神经网络方法是一种极好的矿业城市循环经济发展的综合评价方法。     

煤炭质量控制问题的研究

分析了目前煤炭企业质量控制管理中存在的问题和原因,提出了解决煤炭质量控制问题应以市场为导向,科学地确定煤炭质量控制的指标、重点控制工序、因素,以及围绕重点控制,制定相应的控制标准和对策。     

Analysis of spontaneous combustion liability indices and coal recording standards/basis

The characterization of the physical and chemical properties of coal on a standard provides an understanding of its characteristics towards spontaneous combustion. The trend of linear relationships between coal recording standards (% air-dried (ad), % dry (db) and % dry ash free (daf) basis) of 30 selected coal samples from the Witbank coalfields and spontaneous combustion liability indices were evaluated. The spontaneous combustion liability indices of these samples were evaluated by crossing point temperature (XPT), Stage II Slope, FCC (Feng, Chakravorty, Cochrane) and the Wits-Ehac tests, while the coal properties were determined from the proximate and ultimate analyses. The results obtained from these coal properties were related to different liability indices to develop trends of linear relationships using regression analysis. The ad basis indicated higher correlation coefficients than the db and daf basis for the XPT and FCC index, while the daf showed higher correlation coefficients than the ad and db basis for the Wits-Ehac index. It was found that the trend of linear relationships of these coal properties differs from one liability index to the next. The XPTs showed a better trend followed by the Stage II Slope on the coal properties among the spontaneous combustion liability indices evaluated.     

基于新能源产业导向的电力系统能源效率评估及影响因素分析

提高电力系统能源效率有助于社会经济的可持续绿色发展。首先建立电力系统能源效率评估指标的选取原则,据此在现有常用的评估指标的基础上,从电力系统能源技术效率、能源经济效率、能源环境效率三方面建立基于新能源产业导向的电力系统能源效率评估指标体系。利用Min-max标准化法对指标进行归一化处理,根据专家意见和层次分析法建立电力系统综合能源效率评估模型。以某实际地区电力系统为例,评估分析其系统能源效率,分析影响地区电力系统能源效率的主要因素,以及各因素可带来的系统能源效率提升空间,最后给出提升电力系统能源效率的措施建议。