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bias of reactive power-voltage droop characteristic, so that the reactive power sharing accuracy can be improved. The objective function was proposed with the optimization index of circulate current and load voltage deviation, and the system parameters were optimized and designed. The results show that the improved droop controller can achieve load reactive power precisely without affecting......
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on improved semi-supervised locality preserving projections YANG Wangcan, ZHANG Peilin, WU Dinghai, CHEN Yanlong (Seventh Department, Ordnance Engineering College, Shijiazhuang 050003, China) Abstract: In order to diagnose the fault effectively with a small number of labeled samples, a method of fault diagnosis based on improved semi-supervised locality preserving projections was proposed......
DOI: 10.11817/j.issn.1672-7207.2020.08.012 (1) 其中: (2) (3) (4) 式中:为总场;m为发射磁矩;为TE极化的反射数;h为飞机的飞行高度;为零阶贝塞尔函数;r为接收线圈与发射线圈的距离;为本征面波阻抗;为本征阻抗;与分别为第n层的磁导率和电导率,通常认为大地磁导率等于自由空间的磁导率,即;为发射线圈发射角频率;为第n层的波速. 反演处理中所使用的是总场去除一次场并归一化后的数据[20]: (5) 式中:为一次场;d为归一化垂直磁场分量.层状介质电磁响应公式含有零阶贝塞尔函数的广义积分,为保证计算速度与精度,本文采用快速汉克尔变换数值积分进......
parts (cavity) as an example, using a hardened 4Cr5MoSiV1 steel and AlTiN coated carbide end-milling tool, the empirical model of the cutting force model was carried out with the improved BP neural... optimization of hard milling of the plastic mold parts and its manufacture. Key words: hard milling of mold parts; improved BP neural network; milling force model; parameters optimization 在高速硬切削条件下,切削力直接影响切削热......
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; 文献标志码:A 文章编号:1672-7207(2017)09-2432-09 Analysis of stress and failure mechanism on composite foundation improved by rigid piles under... analytical model of composite foundation improved by rigid piles with concrete damage plasticity model. Stress and failure mechanism of piles were studied in the process of embankment reclamation and loading......
Railway Construction, Central South University, Changsha 410004, China) Abstract: The improved wave superposition method for simulating spatial fluctuating wind field of long-span bridges... be adopted for the curve of the factorized spectral function changed sharply and sparser interpolation points in high frequency section should be used for smoother curve. The improved wave superposition......
nanoparticles[J]. ACS Nano, 2018, 12(4): 3623-3628. [17] ZHANG Hui, JIN Xiating, WU Q M J, et al. Automatic visual detection system of railway surface defects with curvature filter and improved Gaussian mixture......
to separate bubble objects into solitary bubbles, small overlapping bubbles and large overlapping bubbles. The overlapping bubbles were segmented into solitary bubbles by using improved watershed... of Sauter mean diameter and the maximum diameter has an average value of 0.72. Key words: image processing technology; bubble size distribution; improved watershed algorithm; Sauter mean diameter 底吹熔池熔炼是......