台区线损管理瓶颈的突破

随着台区线损精益化管理的逐步深入,台区线损承包人为完成台区线损考核指标弄虚作假的现象时有发生,使台区线损统计失真。问题的关键是公司线损管理层不掌握台区线损统计中的供电量,这也是制约公司对台区线损进一步深入管理的一个瓶颈。廊坊供电公司从科技化管理方面入手,用时两年建设了台区集中抄表系统和负控系统,通过发布台区供电量的方式来堵塞线损管理环节出现的漏洞,从电源侧将线损管理的压力真正传递到台区管理人员,从而达到降损目的。     

The dynamics of disruption from altered auditory feedback: Further evidence for a dissociation of sequencing and timing.

Three experiments were designed to test whether perception and action are coordinated in a way that distinguishes sequencing from timing (Pfordresher, 2003). Each experiment incorporated a trial design in which altered auditory feedback (AAF) was presented for varying lengths of time and then withdrawn. Experiments 1 and 2 included AAF that resulted in action-effect asynchronies (delayed auditory feedback) during simple tapping (Experiment 1) and melody production (Experiment 2). Asynchronous AAF immediately slowed production; this effect then diminished rapidly after removal of AAF. By contrast, sequential alterations of feedback pitch during melody production (Experiment 3) had an effect that varied over successive presentations of AAF (by increasing error rates) that lasted after its withdrawal. The presence of auditory feedback after withdrawal of asynchronous AAF (Experiments 1 and 2) led to overcompensation of timing, whereas the presence of auditory feedback did not influence performance after withdrawal of AAF in Experiment 3. Based on these results, we suggest that asynchronous AAF perturbs the phase of an internal timekeeper, whereas alterations to feedback pitch over time degrade the internal representation of sequence structure. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

基于ISODATA算法的土地利用状况调查

针对现有利用遥感影像进行土地利用状况调查的需求,从统计模式识别的角度出发,在分析ISODATA算法基本原理的基础上,通过visual C＋＋语言编程实现,并将其运用于武汉市某地区的土地利用调查工作中,同时对照ER—DASIMAGINE软件处理结果对分类结果进行分析,提出了改进意见,证明了该方法的可行性与实用性。     

利用PLC进行液体自动混合控制设计

以三种液体混合控制为例,利用PLC的强大功能,对液体混合搅拌进行了自动控制设计,以液体混合控制系统为中心,从控制系统的硬件系统组成、软件选用到系统的设计过程(包括设计方案、设计流程、设计要求、梯形图设计、外部连接通信等)均作了详细阐述,旨在对传统的液体混合控制工作进行自动化改造。     

基于PC104总线的变电站自动抄表系统

介绍了一种基于PC104总线的变电站自动抄表系统,对PC104的应用特点进行了描述,给出了系统的硬件结构及软件流程图,阐述了系统软、硬件的设计思想和具体实现方法。     

Maximum oscillation frequencies and ft sensitivities of two groups of single-VFOA active-RC oscillators

Two groups of three active-RC oscillators that use a single voltage feedback op amp (VFOA) are compared. Linear analysis using a first-order VFOA model shows that all six oscillators have the same maximum oscillation frequency (OF) of 16.67% of the op amp gain-bandwidth product (GBP), despite the fact that based on an ideal VFOA the gain required in the oscillator amplifier section is 3 for one group and 1.5 for the other.Sensitivity of OF to op amp GBP is found to be the same for both groups. Simulation results using a nonlinear VFOA macromodel give good agreement with linear analysis.     

Particle Size Estimation Based on Edge Density

Given image sequences of closely packed particles, the underlying aim is to estimate diameters without explicit segmentation. In a way, this is similar to the task of counting objects without directly counting them. Such calculations may, for example, be useful）Cast estimation of particle size in different application areas. The topic is that of estimating average size （=average diameter） of packed particles, from formulas involving edge density, and the edges from moment-based thresholding are used. An average shape factor is involved in the calculations, obtained for some frames from crude partial segmentation. Measurement results from about 80frames have been analyzed.     

基于强化学习的列车驾驶曲线节能优化算法

在保证安全和准时性的前提下,自动化列车运行可以有效减少列车耗能。为了灵活应对列车运行种的动态变化,提出了一种基于强化学习的方法,可以优化列车控制策略且不采用之前关于列车动力学的知识和设计的列车速度曲线。这个优化模型将列车节能作为目标,把准点到达、列车限速、停车位置作为限制条件。大量的列车运行经验可以被用来训练深度神经网络直到得到最优化行为价值函数,通过对训练过的神经网络输入状态,可以准确输出每个行为的价值,然后再根据行为价值的大小来选择最优的驾驶策略。     

基于外挂式虚拟仪器的军用电台测试

为了对军用电台的多种参数进行综合测试,研究了虚拟仪器技术在电台综合检测中的具体应用,归纳提取出电台指标测试的基本动作语义集合。提出采用通用串行总线USB与虚拟仪器开发系统LabVIEW相结合而形成外挂式的军用电台综合测试平台,兼顾了通用性与专用性,达到减小体积提高效率的目的。