高速公路匝道回归神经网络控制器的设计

提出用回归神经网络进行入口匝道控制的思路。阐述了Elman回归神经网络原理与入口匝道控制原理,选取上、下游时间占有率和车速作为匝道控制器的输入量,并设计了Elman回归神经网络入口匝道控制器,采用一种改进的算法对回归神经网络进行训练。仿真实验表明,该控制器学习误差小,泛化能力好,具有良好的应用前景。     

电压互感器二次回路压降的分析及改善措施

介绍了电力系统电能的综合误差及产生二次压降的原理。提出了对现有电压互感器二次回路进行压降改造的方法。     

基于TCP/IP协议的电厂远程抄表系统

介绍了自动抄表系统的基本组成,分析了目前应用较为广泛的串口抄表系统的不足,并结合当今计算机、通信和网络技术的发展,设计出用以太网为通信渠道、基于TCP/IP协议的远程抄表系统,并对其的应用情况和推广前景作了简要分析.     

龙海地区农村配电变压器计量装置的完善

分析了龙海地区农村配电变压器计量装置存在的问题,对由此产生的电量损失进行了计算;分析了计量装置故障原因,提出了完善农村配电变压器计量装置的措施,并对改造后的农村配电变压器计量装置进行跟踪调查以说明改造效果.     

Effect of temporal aggregation on multiple time series in the frequency domain

The effect of temporal aggregation on bivariate spectral measures is investigated. First, the low‐frequency regression coefficient turns out to be invariant under aggregation irrespective of differencing, with the exception of when the aggregation of flow and stock variables is combined. Second, the long‐run squared coherency is invariant with respect to aggregation irrespective of differencing. Third, for frequencies different from zero, limiting results for a growing aggregation level m are obtained equal to those at frequency 0 of the underlying basic series. Hence, all frequency domain information is distorted by aggregation apart from the long‐run one. This also holds true for the phase angle that always approaches zero with growing aggregation level m. The sole exception to these findings is the case of the skip sampling stationary series. Moreover, for finite aggregation level, one may exactly quantify the aggregational effect on each cycle of interest. Numerical examples illustrate our results.     

Air-conditioning Australian households: The impact of dynamic peak pricing

International mandates for smart metering are enabling variable and real-time pricing regimes such as dynamic peak pricing (DPP), which charges 10–40 times the off-peak rate for electricity during short periods. This regime aims to reduce peak electricity demand (predominantly due to increase in residential air-conditioning usage) and curb greenhouse gas emissions. Although trials indicate that DPP can achieve significant demand reductions, particularly in summer, little is known about how or why households change their cooling practices in response to this strategy. This paper discusses the outcomes of a small qualitative study assessing the impact of a DPP trial on household cooling practices in the Australian state of New South Wales. The study challenges common assumptions about the necessity of air-conditioning and impact of price signals. It finds that DPP engages households as co-managers of their cooling practices through a series of notification signals (SMS, phone, in-home display, email, etc.). Further, by linking the price signal to air-conditioning, some householders consider this practice discretionary for short periods of time. The paper concludes by warning that policy makers and utilities may serve to legitimise air-conditioning usage and/or negate demand reductions by failing to acknowledge the non-rational dynamics of DPP and household cooling practices.     

八钢893计量网通讯不稳定原因分析及系统优化

文章对八钢893计量网络运行中存在的问题进行了分析。提出了优化改进方案，其中包括调整网络拓扑结构、改变避雷器安装方式、双绞线屏蔽层接入总线等方案，确保了893计量网络运行正常。     

中平能化集团以客户为导向的煤炭质量管理

从加强煤质管理、完善储装运系统、提高商品煤计量装备水平的角度,给出了中平能化集团以客户为导向的煤炭质量管理的具体措施。     

主井提升系统的技术改造

介绍了对主井提升系统的多项技术改造及取得效果     

高炉料车轮轴的断裂分析

本文对断轴进行了宏观断口检查并对化学成分、力学性能、高低倍组织及微观断口进行了分析。提出了断裂原因及防范措施。