Gaoya dianqi, 2013 笔者采用数字图像处理算法提取了紫外图像中的放电光斑区域并定义了"光斑面积"参数,试验研究了10、35、110 kV复合绝缘子高压侧电晕放电时的紫外图像和放电量的变化特性,得到了光斑面积与视在放电量之间的关系曲线。获得了光斑面积随仪器增益和观测距离变化时的试验数据并利用MATLAB的CFTOOL工具箱函数进行了拟合分析,研究表明光斑面积与增益之间近似满足于指数变化规律,光斑面积与距离之间近似满足于幂函数变化规律。在此基础上论文给出了50%、60%、70%、80%4种增益 ...
陈磊 +4 more
doaj
Comparative research on multiple estimation models of magnesium content in honey pummelo leaves based on spectral indices [PDF]
[Objectives] Guanxi honey pummelo [Citrus grandis (L.) Osbeck] has a large planting area in Pinghe County, Fujian Province, China. For a long time, honey pummelo farmers have often only focused on the application of fertilizers containing large amounts ...
KONG Qingbo, LI Fangliang, ZHANG Qing
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Long-term intuitionistic fuzzy time series forecasting model based on DTW [PDF]
, 2016 In existing fuzzy time series forecasting models,the intuitionistic fuzzy relationship groups and deterministic transition rules excessively relied on scale of the training data.A long-term intuitionistic fuzzy time series (IFTS) fore-casting model based
Xiao-shi FAN +3 more
core +1 more source
The performance analysis of power spectrum in a regulating valve′s fault diagnosis [PDF]
, 2011 利用小波包分别提取调速阀振动时的正常信号和故障信号的Ar功率谱的特征值,之后利用提取的特征值作为lSSVM的输入,对调速阀的故障进行诊断,取得了良好效果,并与原始信号的效果进行了对比,并阐明了原因。By means of wavelet packet, this paper first extracts features from the AR power spectrum of signals in normal and fault state respectively, then the ...
吴文兵, 黄宜坚
core
The Effect of Bispectrum Coupling Property on Fault Diagnosis [PDF]
, 2013 为了对双谱的耦合性质进行分析,同时利用三阶累积量和双谱对溢流阀进行故障诊断。由于双谱与三阶累积量相比,可以用来描述二次相位耦合,对比实验结果表明,故障的种类不同,其耦合信息对于这些故障判断的影响也不一样。实验中还通过二维小波在不同的方向上对故障信号和正常信号进行特征提取,然后将这些特征值输入支持向量机进行故障判别,实验结果表明,无论考虑耦合因素与否,这些故障信号在不同的频率部分与其正常状态的区分程度都不一样。In order to analyze the coupling properties of ...
吴文兵, 陈文芗, 黄宜坚
core
Research and application of integrated grey support vector machine model [PDF]
, 2009 对灰色预测gM(1,1)模型进行了分析,提出了集成灰色支持向量机的预测模型。分别对影响灰色预测gM(1,1)模型精度的背景值的计算、初值的选取以及数据序列的光滑度进行改进,提出了背景gM模型、初值gM模型、光滑度gM模型,并结合支持向量机的特点,将一维原始数据序列通过三个灰色模型得到的三组值作为支持向量机的输入,原始序列作为支持向量机的输出,训练得到最佳支持向量回归机模型。仿真结果表明了该模型的有效性。Based on grey prediction GM (1,1) model,an ...
吴顺祥, 周忠眉, 林耀进
core
Application of Whole Cell Biosensors in Food Safety Detection [PDF]
Food safety has increasingly become a global concern for human health. Whole cell biosensors are a type of sensing devices that use cells as signal collectors to produce identifiable signals.
ZHANG Hanlei, ZHOU Junjun, LIU Bingbing, LIU Anqi, HAN Junying, ZHAI Dandan
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Environmental quality evalution based on SVM [PDF]
, 2009 为了快速准确地对地区综合环境质量进行评价,提出了基于支持向量机的环境质量评估模型。并以某地区环境监测数据值为样本,进行了环境质量评估分析。实验结果表明,支持向量机应用于环境质量评估无需构建复杂的参数方程,且具有基于知识学习的特性,结构简单实用,具有客观性和通用性。The issue of applying Support Vector Machines(SVM) to evaluate comprehensive environmental quality is explored,and an ...
吴长庆, 程勇, 罗键
core
Research on Emotion Recognition Model Based on Hybrid Feature Extraction of EEG [PDF]
, 2017 随着计算机技术尤其是人工智能的快速发展，拥有情感、具备表达情感和理解情感的能力已经成为人类与机器之间的重要区别。为了加强人机之间的交流和互动，尤其是发展人机之间带有情感交流的感性沟通，情感计算变得越来越重要，而作为其研究过程中不可或缺的重要环节，情绪识别也逐渐发展成为一大热门的研究领域。情绪识别主要是通过人类用户脸上的表情、说话的语气和语调、身体的姿势和行为以及生理信号等特征，来识别和判断人类用户的情绪状态，而基于生理信号的识别由于难以伪装和隐藏显得更加可靠和真实。 本文以人类脑电图 ...
张仕婧
core
Analysis of the Influence of Furnace Side Heat Storage Coefficient on Primary Frequency Modulation Capacity Under Deep Modulation Condition of Thermal Power Unit [PDF]
In order to study the influence of the heat storage coefficient of the furnace side evaporation section and superheating section on the primary frequency modulation capacity of the thermal power unit under the deep modulation working conditions, a ...
CHEN Zhensan +5 more
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