共查询到20条相似文献,搜索用时 976 毫秒
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通过掌握微机防误闲锁系统的组成、防误原理、操作步骤、功能,及制定五防系统管理制度、五防钥匙管理机的使用等,来防止误拉合断路器;误入带电间隔;带负荷拉隔离开关;带接地刀闸或接地线合隔离开关;带电挂接地线或合接地刀闸五种误操作,保证安顺电网的安全运行。 相似文献
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加强信息建设要着眼于提高信息系统的应用水平,提升用户服务满意度。目前国家电网公司已经实现了应用系统的统一化和高度集成,避免了"信息孤岛"现象,当务之急是破解"重建设、轻应用"的顽疾,深化对现有信息系统的应用。甘肃公司通过建立统一的信息运行呼叫中心,推进信息客服化、标准化管理,提升公司信息系统客户服务水平,实现信息系统建设与应用的统一。通过信息运行呼叫中心建设,为公司信息运行服务提供统一的接入平台和规范的处理流程,提高信息运行工作效率与服务质量,降低运营成本,为信息系统深化应用提供稳定、高效的运行服务保障。 相似文献
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Xiangguo Li 《IEEJ Transactions on Electrical and Electronic Engineering》2014,9(4):415-420
This paper presents an improved two‐stage image registration algorithm for super‐resolution. The algorithm is based on the rotation–translation (RT) model and the coarse‐to‐fine strategy. It first uses the phase correlation algorithm to estimate large‐scale displacements with pixel‐level accuracy after image motion compensation, and then uses the Keren algorithm to obtain high‐accuracy sub‐pixel estimation. Moreover, from the non‐commutative property between rotation and translation in the RT model, synthesis formulae are derived and used to combine the two results together, which could further improve the accuracy without extra computational costs. The algorithm can achieve high‐accuracy sub‐pixel registration for large‐scale displacements, which also has the advantage of good computational efficiency. To illustrate the effectiveness of the algorithm, both simulations and practical super‐resolution reconstruction experiments are performed. © 2014 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. 相似文献
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江苏省电力公司首次将呼叫中心的运营理念引入电力行业,将电力服务热线95598的运营模式由各地市公司自行运营升级为省统一集中管理。介绍呼叫中心知识库的设计和内容,提高一线坐席的一次问题解决率、业务回答的准确率。 相似文献
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Fabien Prgaldiny Franois Krummenacher Birahim Diagne Franois Pêcheux Jean‐Michel Sallese Christophe Lallement 《International Journal of Numerical Modelling》2006,19(3):239-256
This paper presents a new compact model for the undoped, long‐channel double‐gate (DG) MOSFET under symmetrical operation. In particular, we propose a robust algorithm for computing the mobile charge density as an explicit function of the terminal voltages. It allows to greatly reduce the computation time without losing any accuracy. In order to validate the analytical model, we have also developed the 2D simulations of a DG MOSFET structure and performed both static and dynamic electrical simulations of the device. Comparisons with the 2D numerical simulations give evidence for the good behaviour and the accuracy of the model. Finally, we present the VHDL‐AMS code of the DG MOSFET model and related simulation results. Copyright © 2006 John Wiley & Sons, Ltd. 相似文献
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CMT‐CQA: Cross‐layer QoS‐aware adaptive concurrent multipath data transfer in heterogeneous networks
Yuanlong Cao Changqiao Xu Jianfeng Guan Hongke Zhang 《IEEJ Transactions on Electrical and Electronic Engineering》2015,10(1):75-84
Stream control transport protocol (SCTP)‐based concurrent multipath transfer (CMT) can help multi‐homed devices to increase their throughput by making use of parallel transmissions over multiple paths and bandwidth aggregation. However, if CMT cannot identify wireless error, it cannot really achieve the desired performance. Furthermore, if CMT only utilizes all available paths for data delivery, it will undoubtedly degrade application‐level performance since the asymmetric paths may involve large quality differences. This paper proposes a novel cross‐layer quality‐of‐service (QoS)‐aware adaptive CMT (CMT‐CQA) with the following aims: (i) to provide an adaptive ‘CMT‐to‐partial CMT’ adjustment strategy for efficient bandwidth aggregation by jointly considering transport layer QoS, MAC layer QoS, and path history information; (ii) to address an enhanced congestion window (cwnd) fast recovery mechanism to reduce bursty transmission in multi‐homed wireless network environments where fail‐over occurs frequently; and (iii) to introduce a proper multimedia transmission behavior to improve users' quality of experience (QoE) for multimedia streaming service. Simulation results show that CMT‐CQA outperforms the existing CMT solutions in terms of performance and QoS. © 2014 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. 相似文献
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当含分布式电源的智能配电网发生大规模停电事故时,必须尽快制定供电恢复计划,减少停电面积。在保证配电网安全运行的前提下,考虑以甩负荷最少及开关操作次数最少两方面因素建立含分布式电源的智能配电网供电恢复模型,提出采用多智能体粒子群优化算法快速恢复孤岛外非故障断电区域负荷供电。该算法在二进制粒子群优化算法基础上引入Multi-Agent概念,每一个Agent相当于一个粒子,通过粒子Agent之间的竞争与合作操作使其快速有效地收敛到全局最优解。算例结果证明了所提算法的可行性和有效性。 相似文献
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基于分数阶小波变换的电力谐波检测方法是一项新兴的研究成果,其可较好地解决新型电力系统中谐波检测受噪声干扰的问题,提高谐波检测精度。然而传统离散分数阶小波变换均基于Mallat算法完成,其实现过程中的下采样操作将影响谐波信号的检测精度。针对这一问题,文章将非下采样多孔算法与分数阶小波变换相结合得到一种改进的离散分数阶小波变换实现方法,并在此基础上提出一种基于多孔分数阶小波变换的谐波检测新方法。此外,文章采用基于分数阶频谱四阶原点矩的方法确定最佳分数阶变换阶次,有效降低计算复杂度。实验结果表明,新方法对稳态谐波、短时谐波及时变谐波均能有效实现信号降噪和分离,并能对信号分量的幅值、频率及定位信息实现高精度检测。 相似文献
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现有电压暂降严重程度评估方法未充分考虑多元线路特征因素对输电线路故障概率的影响,从而导致评估结果出现较大误差。由此,本文提出了基于多元线路特征因素融合的电压暂降严重程度评估方法。首先,基于线路历史故障数据,采用关联规则量化多元线路特征因素对线路故障的影响程度。然后,通过改进D-S证据理论融合多元线路特征因素建立准确的线路年故障概率模型;并采用基于最大熵模型的故障点法评估节点的电压暂降水平。最后,提出了一种同时考虑系统侧电压暂降严重程度和用户敏感设备耐受特性的综合电压暂降严重程度指标用于评估节点电压暂降严重程度。通过与某区域电网实际电能质量监测数据对比,本文所提方法的准确率可达到90%以上。同时通过与未充分考虑线路特征因素的评估案例对比,所提方法的准确率明显提高。因此,在进行电压暂降严重程度评估时,综合考虑线路特征因素可以有效的提高评估结果的准确率。 相似文献
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发电机-变压器组过励磁保护若干问题的研究 总被引:2,自引:0,他引:2
对大型发电机 — 变压器组过励磁保护的3个问题进行了分析,分别是:保护动作特性曲线与设备过励磁曲线的配合、保护算法的性能以及保护应用中的相关问题。针对前2个问题,通过对不同动作特性曲线、算法的性能对比分析结果表明,基于分段原理的动作特性曲线和基于反时限保护动作状态与动作量基本关系的算法具有更好的性能,由这两者构成的过励磁保护方案能对机组起到更有效的保护作用。对于第3个问题,通过对保护的电压、定值和动作出口方式进行合理的选取和设置,可以在保证机组安全的基础上,充分发挥机组的效益。 相似文献
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Yali Zheng Hong Cheng Yuan Yan Tang Bin Fang 《IEEJ Transactions on Electrical and Electronic Engineering》2014,9(2):200-206
In this paper, we propose an optimized trajectory recovery algorithm for on‐road vehicles from monocular videos, which considers multiple constraints between frames in a sliding window. We build a linear system to optimally estimate the camera rotation matrix corresponding to the first frame in each sliding window, and calculate the camera center estimation. The camera centers are determined by the estimation and prediction eventually. The whole process is applied to the sequential video frames by sliding the window. The advantage of the proposed algorithm is that it is able to reduce the drift error, which is a challenge for the existing algorithms, since multiple constraints in a sliding window are used to optimize the camera poses. We test the algorithm both on synthetic data and real data, and compare it with existing algorithms. It shows a higher accuracy of reconstruction and is suitable to recover a better trajectory of on‐road vehicles from monocular videos. © 2014 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. 相似文献
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