Results 41 to 50 of about 432 (121)
Zhongguo youzhi为满足工业化生产过程中对植物油基多元醇性能的在线快速检测，以环氧大豆油为原料，合成了57个不同羟基含量的植物油基多元醇〔羟基值（KOH）94.1~229.4 mg/g、环氧值0~3.68%、聚合羟基值（KOH）85.1~207.5 mg/g〕，采用傅里叶红外光谱（FTIR）仪对样品进行扫描，以43个样品作为建模集，14个样品作为验证集，建立基于FTIR的不同植物油基多元醇的羟基值、环氧值和聚合羟基值的定量模型。考察了归一化、二阶导数、标准正态变量变换、多元散射校正、正交散射校正（OSC ...
李文龙1，叶子寒2，王琰1，孙悦文1，毕艳兰1，彭丹1，李军1LI Wenlong1, YE Zihan2, WANG Yan1, SUN Yuewen1, BI Yanlan1, PENG Dan1, LI Jun1
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Shelf Life Identification and Quality Analysis of Golden Delicious Apples Based on Hyperspectral Imaging and Near Infrared Spectroscopy [PDF]
In order to achieve non-destructive analysis of shelf life, soluble solid content (SSC) and pH of Golden Delicious apples, the spectral information of six different shelf life (postharvest 0, 7, 14, 21, 28 and 35 d) of apple was collected by ...
Han CHEN +5 more
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Spatial Load Forecasting Method Based on Multiscale LDTW and TCN [PDF]
Spatial Load Forecasting(SLF) provides necessary guidance for the rational construction and use of substations and feeders, and it has become an indispensable aspect of distribution network planning.
Yue MA, Mi WEN
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Gaoya dianqi, 2015 为解决常规阴性选择方法在故障诊断领域存在漏诊和故障难以有效细分检测的缺陷,文中提出一种结合核主成分分析（KPCA）的实值阴性选择自适应分类算法,采用实值编码,以欧氏距离衡量被检样本与检测器的亲和度,具备学习和分类的能力,实现了故障的细分类。针对电力变压器油中溶解气体数据（DGA）,应用核主成分分析技术提取样本特征量,经归一化处理后对所提出的算法进行训练,测试结果证明了该方法的有效性,与BP神经网络、最小二乘支持向量机相比,获得了更高的故障检出率,对电力变压器典型的4类故障检出率达到了90%以上。
陈鹏
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Application of Complex Three-Order Cumulants to Fault Diagnosis of Hydraulic Valve [PDF]
, 2013 为了提高故障诊断正确率,提出了一种基于复数三阶累积量的机械故障诊断方法.三阶累积量的不同定义的复数形式包含了信号间不同的耦合信息,利用这些信息进行了故障诊断.在溢流阀故障诊断实验中,利用这些不同的耦合信息,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,上述方法可以提高故障诊断正确率.同时还对实数三阶累积量也进行了相同的实验,这些实验所取得的诊断效果证明了采用本文方法的有效性.In order to improve the ...
吴文兵, 周桃庚, 杨淑群
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Photovoltaic Output Prediction Based on Improved Long Short-Term Memory Network Using White Shark Optimization Algorithm [PDF]
ObjectivesIn order to ensure the safety, stability, and economic operation of the power system after photovoltaic integration, a photovoltaic power prediction model based on improved long short-term memory (LSTM) network using white shark optimization ...
LI Lanqing +5 more
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A Novel Distributed Photovoltaic Output Interval Prediction Method [PDF]
ObjectivesDistributed photovoltaic power prediction is of great significance for the operation and scheduling of photovoltaic power plants. Point prediction methods are difficult to comprehensively describe the uncertainty of distributed photovoltaic ...
CHEN Jin +7 more
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Kalman filter algorithm for short-term jam traffic prediction based on traffic parameter correlation [PDF]
, 2014 A Kalman filter model considering the correlation property of traffic flow parameters is proposed to realize network short-term traffic flow prediction under jam traffic.
Dong, Chunjiao +4 more
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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
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Information monitor method of RFID system based on logarithm spectrum RF fingerprint identification [PDF]
, 2014 To make up for the shortcomings of the information control in RFID systems, an information monitor method of passive RFID systems based on emitter identification was proposed.
Hong-lin YUAN, Yan YAN, Zhi-hua BAO
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